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cookbooks:devel:pseudovariables [2017/08/11 19:48] mslehto [$T(name)] add: reply_reason, reply_last |
cookbooks:devel:pseudovariables [2021/04/27 09:34] miconda |
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- | {{ : | + | ====== |
- | ====== | + | |
- | ===== Introduction ===== | + | Version: Kamailio SIP Server v5.6.x (devel) |
- | The term “pseudo-variable” is used for special tokens that can be given as parameters to different script functions and they will be replaced with a value before the execution of the function. | + | ===== Overview ===== |
- | The beginning of a “pseudo-variable” is marked | + | This tutorial collects the functions and parameters exported |
- | There is a set of predefined pseudo-variables, | + | **Note:** The parameters on this page are **NOT** in alphabetical order. |
- | Pseudo-Variables are implemented by various modules, most of them are provided by **pv** (if there is no special reference to a module, expect that the pseudo-variable is provided by **pv** module). | + | ===== Structure ===== |
- | ===== Pseudo-variables usage ===== | + | The structure of the kamailio.cfg can be seen as three parts: |
+ | * global parameters | ||
+ | * modules settings | ||
+ | * routing blocks | ||
- | Pseudo-variables can be used with many modules, among them: | + | For clarity and making it easy to maintain, it is recommended to keep them in this order, although some of them can be mixed. |
- | * acc | + | ==== Global Parameters Section ==== |
- | * avpops | + | |
- | * htable | + | |
- | * textops | + | |
- | * uac | + | |
- | * xlog | + | |
- | ===== The list of pseudo-variables ===== | + | This is the first part of the configuration file, containing the parameters for the core of kamailio and custom global parameters. |
+ | Typically this is formed by directives of the form: | ||
- | Predefined pseudo-variables are listed in alphabetical order. | + | < |
+ | name=value | ||
+ | </ | ||
- | ==== $$ - Pseudo-variable marker ==== | + | The name corresponds to a core parameter as listed in one of the next sections of this document. If a name is not matching a core parameter, then Kamailio will not start, rising an error during startup. |
- | **$$** - represents the character ' | + | The value is typically an integer, boolean or a string. |
- | ==== $_s(format) - Evaluate dynamic format ==== | + | Several parameters can get a complex value which is formed from a group of integer, strings or identifiers. For example, such parameter is **listen**, which can be assigned a value like **proto: |
- | **$_s(format)** - returns the string after evaluating all pseudo-variables in format | + | Example of content: |
- | < | + | < |
- | | + | log_facility=LOG_LOCAL0 |
- | # is equivalent of: | + | children=4 |
- | $var(x) | + | disable_tcp=yes |
+ | |||
+ | alias=" | ||
+ | |||
+ | listen=udp: | ||
</ | </ | ||
- | ==== $ai - URI inP-Asserted-Identity header ==== | + | Usually setting a parameter is ended by end of line, but it can be also ended with **;** (semicolon). This should be used when the grammar of a parameter allows values on multiple lines (like **listen** or **alias**) and the next line creates a conflict by being swallowed as part of value for previous parameter. |
- | **$ai** - reference to URI in request' | + | <code c> |
+ | alias=" | ||
+ | </ | ||
- | ==== $adu - Auth Digest URI ==== | + | If you want to use a reserved config keyword as part of a parameter, you need to enclose it in quotes. See the example below for the keyword " |
- | **$adu** - URI from Authorization or Proxy-Authorization header. This URI is used when calculating the HTTP Digest Response. | + | <code c> |
+ | listen=tcp: | ||
+ | </ | ||
+ | ==== Modules Settings Section ==== | ||
- | ==== $aa - Auth algorithm ==== | + | This is the second section of the configuration file, containing the directives to load modules and set their parameters. |
- | **$aa** - algorithm from Authorization or Proxy-Authorization header. | + | It contains the directives |
- | ==== $ar - Auth realm ==== | + | Example of content: |
- | **$ar** - realm from Authorization or Proxy-Authorization header | + | <code c> |
+ | loadmodule " | ||
+ | ... | ||
+ | modparam(" | ||
+ | </ | ||
+ | ==== Routing Blocks Section ==== | ||
- | ==== $au - Auth username user ==== | + | This is the last section of the configuration file, typically the biggest one, containing the routing blocks with the routing logic for SIP traffic handled by Kamailio. |
- | **$au** - user part of username from Authorization or Proxy-Authorization header | + | The only mandatory routing block is **request_route**, which contains the actions for deciding the routing for SIP requests. |
+ | See the chapter **Routing Blocks** in this document for more details about what types of routing blocks can be used in the configuration file and their role in routing SIP traffic and Kamailio behaviour. | ||
- | ==== $ad - Auth username domain ==== | + | Example of content: |
- | **$ad** - domain part of username from Authorization or Proxy-Authorization header | + | <code c> |
+ | request_route { | ||
+ | # per request initial checks | ||
+ | route(REQINIT); | ||
- | ==== $aU - Auth whole username ==== | + | ... |
+ | } | ||
- | **$aU** - whole username from Authorization or Proxy-Authorization header | + | branch_route[MANAGE_BRANCH] { |
+ | xdbg(" | ||
+ | route(NATMANAGE); | ||
+ | } | ||
+ | </ | ||
- | ==== $Au - Acc username | + | ===== Generic Elements ===== |
- | **$Au** - username for accounting purposes. It's a selective pseudo variable (inherited from acc module). It returns auth username ($au) if exists or From username ($fU) otherwise. | + | ==== Comments ==== |
+ | Line comments start with **#** (hash/pound character - like in shell) or **/ /** (double forward slash - like in C++/Java). | ||
- | ==== $branch(name) - Branch attributes ==== | + | Block comments start with /* (forward slash and asterisk) and are ended by */ (sterisk and forward slash) (like in C, C++, Java). |
- | **$branch(name)** - reference to attribute ' | + | Example: |
- | This pseudo variable gives you access to the " | + | < |
+ | # this is a line comment | ||
+ | |||
+ | // this is another line comment | ||
+ | |||
+ | /* this | ||
+ | is | ||
+ | a | ||
+ | | ||
+ | | ||
+ | </ | ||
- | The ' | + | Important: be aware of preprocessor directives that start with **#!** (hash/pound and exclamation) - those are no longer line comments. |
- | * uri - return uri of the branch | + | ==== Values ==== |
- | * dst_uri - return destination uri (next hop address) | + | |
- | * path - return the path vector for the branch | + | There are three types of values: |
- | * q - return the q value of the branch | + | |
- | * send_socket - return the socket to be used to send the branch | + | * integer |
- | * count - return the number | + | * boolean |
- | * flags - return the branch flags value | + | * string |
- | * ruid - return the ruid of the branch (Record internal Unique ID from usrloc) | + | |
- | The PV can take an index to access a specif branch: $(branch(name)[index]) | ||
Example: | Example: | ||
<code c> | <code c> | ||
- | $var(i)=0; | + | // next two are strings |
- | while($var(i)< | + | |
- | { | + | "this is a string value" |
- | xlog("$(branch(uri)[$var(i)])\n"); | + | ' |
- | $var(i) = $var(i) + 1; | + | |
- | } | + | // next is a boolean |
+ | |||
+ | yes | ||
+ | |||
+ | // next is an integer | ||
+ | |||
+ | 64 | ||
</ | </ | ||
- | Starting with 3.1.0, you can assign value per attribute. Index can be used to update a specific branch: | + | ==== Identifiers ==== |
+ | |||
+ | Identifiers are tokens which are not enclosed in single or double quotes and to match the rules for integer or boolean values. | ||
+ | |||
+ | For example, the identifiers are the core parameters and functions, module functions, core keywords and statements. | ||
+ | |||
+ | Example: | ||
<code c> | <code c> | ||
- | $(branch(attr)[index]) = value; | + | return |
</ | </ | ||
- | If index is missing, first branch is used. If index is -1 the last branch is used. | + | ==== Variables ==== |
- | Assigning | + | The variables start with **$** (dollar character). |
+ | |||
+ | You can see the list with available variables in the Pseudo-Variables Cookbook. | ||
+ | |||
+ | Example: | ||
<code c> | <code c> | ||
- | $(branch(uri)[2]) = "sip:test@kamailio.org; | + | $var(x) = $rU + " |
</ | </ | ||
+ | ==== Actions ==== | ||
- | ==== $br - Request' | + | An action is an element used inside routing blocks ended by **;** (semicolon). It can be an execution of a function from core or a module, a conditional or loop statement, an assignment expression. |
- | **$br** - reference to request' | + | Example: |
- | <fc #0000ff>It is R/W variable, you can assign values to it directly in configuration file (will add a new branch).</fc> | + | <code c> |
+ | sl_send_reply(" | ||
+ | exit; | ||
+ | </code> | ||
- | ==== $bR - Request' | + | ==== Expressions |
- | **$bR** - reference to request' | + | An expression is an association group of statements, variables, functions and operators. |
- | ==== $bf - Branch flags ==== | + | Example: |
- | **$bf** - reference to branch flags of branch 0 (RURI) - decimal output | + | <code c> |
+ | if(!t_relay()) | ||
- | <fc # | + | if($var(x)>10) |
- | ==== $bF - Branch flags ==== | + | |
- | **$bF** - reference to branch flags of branch 0 (RURI) - hexa output | + | " |
+ | </ | ||
- | <fc # | + | ===== Config Pre-Processor Directives ===== |
- | ==== $bs - Body size ==== | + | ==== include_file |
- | **$bs** - body size | + | < |
- | + | include_file " | |
- | ==== $ci - Call-Id ==== | + | </ |
- | **$ci** - reference to body of call-id header | + | Include the content |
- | ==== $cl - Content-Length ==== | + | The path_to_file can be relative or absolute. If it is not absolute path, first attempt is to locate it relative to current directory, and if fails, relative to directory of the file that includes it. There is no restriction where include can be used or what can contain |
- | **$cl** - reference to body of content-length header | + | If the included file is not found, the config file parser throws error. You can find this error message at the logging destination, |
- | ==== $cnt(pv) - Count number of pvs ==== | + | You can use also the syntax **# |
- | **$cnt(avp)** - return the number | + | Example |
<code c> | <code c> | ||
- | xlog("$$avp(x) fount $cnt($avp(x)) times\n"); | + | route { |
+ | ... | ||
+ | include_file | ||
+ | ... | ||
+ | } | ||
+ | |||
+ | --- / | ||
+ | |||
+ | | ||
+ | | ||
+ | | ||
+ | } | ||
+ | |||
+ | --- | ||
</ | </ | ||
- | ==== $conid - TCP Connection ID ==== | ||
- | **$conid** - The TCP connection ID of the connection the current message arrived on for TCP, TLS, WS, and WSS. Set to $null for SCTP and UDP. | + | ==== import_file ==== |
- | ==== $cs - CSeq ==== | + | < |
+ | | ||
+ | </ | ||
- | **$cs** - reference to the sequence number in the cseq header. The method in the CSeq header | + | Similar to **include_file**, but does not throw error if the included file is not found. |
- | ==== $ct - Contact header | + | ==== define |
- | **$ct** | + | Control in C-style what parts of the config file are executed. The parts in non-defined zones are not loaded, ensuring lower memory usage and faster execution. |
+ | Available directives: | ||
+ | * **#!define NAME** - define a keyword | ||
+ | * **#!define NAME VALUE** - define a keyword with value | ||
+ | * **#!ifdef NAME** - check if a keyword is defined | ||
+ | * **# | ||
+ | * **#!else** - switch to false branch of ifdef/ | ||
+ | * **#!endif** - end ifdef/ | ||
+ | * **# | ||
+ | * **# | ||
- | ==== $cT - Content-Type ==== | + | Predefined keywords: |
+ | * **KAMAILIO_X[_Y[_Z]]** | ||
+ | * **MOD_X** | ||
+ | See ' | ||
- | **$cT** - reference to body of content-type header | + | Among benefits: |
+ | | ||
+ | | ||
+ | | ||
- | ==== $dd - Domain of destination URI ==== | + | Example: how to make config to be used in two environments, |
- | **$dd** - reference to domain of destination uri (without port) | + | <code c> |
+ | ... | ||
+ | #!define TESTBED_MODE | ||
- | ==== $di - Diversion header URI ==== | + | #!ifdef TESTBED_MODE |
+ | debug=5 | ||
+ | log_stderror=yes | ||
+ | listen=192.168.1.1 | ||
+ | #!else | ||
+ | debug=2 | ||
+ | log_stderror=no | ||
+ | listen=10.0.0.1 | ||
+ | #!endif | ||
- | **$di** - reference to Diversion header URI | + | ... |
- | ==== $dip - Diversion | + | #!ifdef TESTBED_MODE |
+ | modparam("acc|auth_db|usrloc", " | ||
+ | " | ||
+ | #!else | ||
+ | modparam(" | ||
+ | " | ||
+ | #!endif | ||
- | **$dip** - reference to Diversion header " | + | ... |
- | ==== $dir - Diversion " | + | #!ifdef TESTBED_MODE |
+ | route[DEBUG] { | ||
+ | xlog(" | ||
+ | } | ||
+ | #!endif | ||
- | **$dir** - reference to Diversion header " | + | ... |
- | ==== $dic - Diversion " | + | route { |
+ | #!ifdef TESTBED_MODE | ||
+ | route(DEBUG); | ||
+ | #!endif | ||
- | **$dic** - reference to Diversion header " | + | ... |
+ | } | ||
- | ==== $dp - Port of destination URI ==== | + | ... |
+ | </ | ||
- | **$dp** - reference to port of destination uri | + | |
- | ==== $dP - Transport protocol of destination URI ==== | + | <code c> |
+ | #!define MYINT 123 | ||
+ | #!define MYSTR " | ||
+ | </ | ||
- | **$dP** - reference to transport protocol of destination uri | + | |
- | ==== $ds - Destination set ==== | + | <code c> |
+ | $var(x) | ||
+ | </ | ||
- | **$ds** - reference to destination set | + | |
+ | <code c> | ||
+ | $var(x) = 100 + 123; | ||
+ | </ | ||
- | ==== $du - Destination URI ==== | + | * you can have multi-line defined IDs |
- | **$du** - reference to destination uri | + | <code c> |
+ | #!define IDLOOP | ||
+ | while($var(i)< | ||
+ | xlog(" | ||
+ | $var(i) = $var(i) + 1; \ | ||
+ | } | ||
+ | </ | ||
- | If loose_route() returns TRUE a destination uri is set according to the first Route header. | + | |
- | $du is also set if lookup() function of ' | + | |
- | set $du to any SIP URI. | + | |
- | | + | |
- | | + | |
- | | + | |
- | <fc #0000ff>It is R/W variable (you can assign values to it directly in configuration file)</fc> | + | <code c> |
+ | route { | ||
+ | ... | ||
+ | IDLOOP | ||
+ | ... | ||
+ | } | ||
+ | </code> | ||
- | To reset $du: | + | * number of allowed defines is now set to 256 |
- | $du = $null; | + | |
- | ==== $fd - From URI domain ==== | + | * notes: |
+ | * multilines defines are reduced to single line, so line counter should be fine | ||
+ | * column counter goes inside the define value, but you have to omit the ' | ||
+ | * text on the same line as the directive will cause problems. Keep the directive lines clean and only comment on a line before or after. | ||
- | **$fd** - reference to domain in URI of ' | + | ==== defenv ==== |
- | ==== $fn - From display | + | Preprocessor directive to define an ID to the value of an environment variable with the name ENVVAR. |
- | **$fn** - reference to display name of ' | + | <code c> |
+ | #!defenv ID=ENVVAR | ||
+ | </ | ||
- | ==== $fs - Forced socket ==== | + | It can also be just **$!defenv ENVVAR** and the defined ID is the ENVVAR name. |
- | **$fs** - reference to the forced socket for message sending (if any) in the form proto:ip:port | + | Example: |
- | <fc #0000ff> | + | <code c> |
+ | #!defenv SHELL | ||
+ | </code> | ||
- | ==== $ft - From tag ==== | + | If environment variable |
- | **$ft** - reference to tag parameter of ' | + | <code c> |
+ | #!define SHELL /bin/bash | ||
+ | </ | ||
- | ==== $fti - Initial From tag ==== | + | Full expression variant: |
- | **$fti** - reference to tag parameter of ' | + | <code c> |
+ | #!defenv ENVSHELL=SHELL | ||
+ | </ | ||
- | The value From tag in the initial request can be in the To tag, if the request within the dialog | + | Then it is like: |
- | It is exported by **rr** module and has to be used after loose_route(). The append_fromtag parameter is required to be set to 1 in order to have this variable returning the right value. | + | <code c> |
- | ==== $fu - From URI ==== | + | #!define ENVSHELL /bin/bash |
+ | </ | ||
- | **$fu** - reference to URI of ' | + | It is a simplified alternative of using **# |
+ | |||
+ | ==== subst ==== | ||
- | <fc # | + | * perform substitutions inside the strings of config |
+ | * #!subst offers an easy way to search and replace inside strings before cfg parsing. E.g.,: | ||
- | Note that changing the From: header may break backwards compatibility with SIP 1.0 devices. | + | <code c> |
- | ==== $fU - From URI username ==== | + | #!subst "/ |
+ | </ | ||
- | **$fU** | + | |
- | <fc # | + | Example: |
- | Note that changing the From: header may break backwards compatibility with SIP 1.0 devices. | + | <code c> |
- | ==== $mb - SIP message buffer ==== | + | #!subst "/ |
+ | modparam(" | ||
+ | </ | ||
- | **$mb** - reference to SIP message buffer | + | |
- | ==== $mf - Flags ==== | + | ==== substdef |
- | **$mf** - reference to message/transaction flags set for current SIP request | + | <code c> |
+ | #!substdef "/ID/ | ||
+ | </ | ||
- | <fc # | + | Similar |
- | ==== $mF - Flags in hexadecimal | + | ==== substdefs |
- | **$mF** -reference to message/transaction flags set for current SIP request in hexa-decimal | + | <code c> |
+ | #!substdefs "/ID/ | ||
+ | </ | ||
- | <fc # | + | Similar |
+ | ===== Core Keywords ===== | ||
- | ==== $mi - SIP message id ==== | + | Keywords specific to SIP messages which can be used mainly in '' |
- | **$mi** - reference to SIP message id | + | ==== af ==== |
- | ==== $ml - SIP message | + | The address family of the received |
- | **$ml** - reference to SIP message length | + | Exampe of usage: |
- | ==== $mt - SIP Message | + | <code c> |
+ | if (af==INET6) { | ||
+ | log("Message | ||
+ | } | ||
+ | </ | ||
- | **$mt** - returns 1 if the sip message is a request, returns 2 if the sip message is a reply | + | ==== dst_ip ==== |
+ | The IP of the local interface where the SIP message was received. When the proxy listens on many network interfaces, makes possible to detect which was the one that received the packet. | ||
- | ==== $od - Domain original R-URI ==== | + | Example of usage: |
- | **$od** - reference to domain in request' | + | <code c> |
+ | | ||
+ | log(" | ||
+ | }; | ||
+ | </ | ||
- | ==== $op - Port in original R-URI ==== | + | ==== dst_port |
- | **$op** - reference to port of original R-URI | + | The local port where the SIP packet was received. When Kamailio is listening on many ports, it is useful to learn which was the one that received the SIP packet. |
- | ==== $oP - Protocol | + | Example |
+ | <code c> | ||
+ | | ||
+ | { | ||
+ | | ||
+ | }; | ||
+ | </ | ||
- | **$oP** - reference to transport protocol of original R-URI | ||
- | ==== $ou - Original R-URI ==== | + | ==== from_uri |
- | **$ou** - reference to request's original | + | This script variable is a reference to the URI of 'From' header. It can be used to test ' |
- | ==== $oU - Username in original R-URI ==== | + | Example of usage: |
- | **$oU** - reference to username in request' | + | <code c> |
+ | if(is_method(" | ||
+ | { | ||
+ | log(" | ||
+ | }; | ||
+ | </ | ||
- | ==== $pd - Domain in P-Preferred-Identity header URI ==== | + | ==== method |
- | **$pd** - reference to domain in request' | + | The variable is a reference to the SIP method of the message. |
- | ==== $pn - Display Name in P-Preferred-Identity header ==== | + | Example of usage: |
- | **$pn** - reference to Display Name in request' | + | <code c> |
+ | if(method==" | ||
+ | { | ||
+ | | ||
+ | }; | ||
+ | </ | ||
- | ==== $pp - Process id ==== | + | ==== msg: |
- | **$pp** - reference to process id (pid) | + | The variable is a reference to the size of the message. It can be used in ' |
- | ==== $pr - Protocol of received message ==== | ||
- | **$pr** or **$proto** - protocol | + | Example |
+ | <code c> | ||
+ | if(msg: | ||
+ | { | ||
+ | sl_send_reply(" | ||
+ | exit; | ||
+ | }; | ||
+ | </ | ||
- | ==== $pU - User in P-Preferred-Identity header URI ==== | ||
- | **$pU** - reference to user in request' | + | . |
- | ==== $pu - URI in P-Preferred-Identity header | + | ==== proto ==== |
- | **$pu** - reference | + | This variable can be used to test the transport protocol of the SIP message. |
+ | Example of usage: | ||
+ | <code c> | ||
+ | if(proto==UDP) | ||
+ | { | ||
+ | log(" | ||
+ | }; | ||
+ | </ | ||
+ | ==== status ==== | ||
- | ==== $rb - Body of request/reply ==== | + | If used in onreply_route, |
- | **$rb** - reference to message body | + | Example of usage: |
+ | <code c> | ||
+ | if(status==" | ||
+ | { | ||
+ | log(" | ||
+ | }; | ||
+ | </ | ||
- | ==== $rc - Returned code ==== | ||
- | **$rc** - reference to returned code by last invoked function | + | ==== snd_af ==== |
- | **$retcode** - same as **$rc** | + | ==== snd_ip ==== |
- | ==== $rd - Domain in R-URI ==== | + | ==== snd_port |
- | **$rd** - reference to domain in request' | + | ==== snd_proto ==== |
- | <fc # | + | ==== src_ip ==== |
- | ==== $rdir(key) - Request Direction ==== | + | Reference to source IP address of the SIP message. |
- | **$rdir(key)** - get the direction of the request within dialog. | + | Example of usage: |
+ | <code c> | ||
+ | if(src_ip==127.0.0.1) | ||
+ | { | ||
+ | log("the message was sent from localhost!\n" | ||
+ | }; | ||
+ | </ | ||
- | The direction is ' | + | ==== src_port ==== |
- | The key can be: | + | Reference to source port of the SIP message (from which port the message was sent by previous hop). |
- | * id - the returned value is an integer: 1 - for direction downstream, 2 - for direction upstream | + | Example of usage: |
- | * name - the returned value is a string: ' | + | <code c> |
+ | if(src_port==5061) | ||
+ | { | ||
+ | log(" | ||
+ | } | ||
+ | </ | ||
- | Example: | + | ==== to_ip ==== |
+ | ==== to_port ==== | ||
+ | |||
+ | ==== to_uri ==== | ||
+ | |||
+ | This variable can be used to test the value of URI from To header. | ||
+ | |||
+ | Example of usage: | ||
<code c> | <code c> | ||
- | if($rdir(name)=="upstream" | + | |
- | | + | |
- | } | + | log("this is a request |
+ | }; | ||
</ | </ | ||
- | The variable is exported by **rr** module and append_fromtag parameter must be enabled. The variable has to be used after loose_route() function. | + | ==== uri ==== |
- | ==== $re - Remote-Party-ID header URI ==== | + | |
- | **$re** - reference to Remote-Party-ID header URI | ||
- | ==== $rm - SIP method ==== | + | This variable can be used to test the value of the request URI. |
- | **$rm** - reference to request' | + | Example of usage: |
+ | <code c> | ||
+ | if(uri=~" | ||
+ | { | ||
+ | log("this is a request for kamailio.org users\n" | ||
+ | }; | ||
+ | </ | ||
- | ==== $rmid - SIP Method ID ==== | ||
- | **$rmid** - returns internal integer representation of SIP method type | ||
- | ==== $route_uri - URI in first Route header | + | ===== Core Values ===== |
- | **$route_uri** - returns the string with URI field in the first Route header | + | Values that can be used in ''' |
- | ==== $rp - Port in R-URI ==== | + | ==== INET ==== |
- | **$rp** - reference | + | This keyword can be used to test whether the SIP packet was received over an IPv4 connection. |
- | <fc # | + | Example of usage: |
- | ==== $rP - Protocol of R-URI ==== | + | <code c> |
+ | if (af==INET) { | ||
+ | log(" | ||
+ | } | ||
+ | </ | ||
- | **$rP** - reference to transport protocol of R-URI | + | ==== INET6 ==== |
- | ==== $rr - SIP reply reason phrase ==== | + | This keyword can be used to test whether the SIP packet was received over an IPv6 connection. |
- | **$rr** - reference to reply' | + | Example of usage: |
+ | <code c> | ||
+ | if(af==INET6) | ||
+ | { | ||
+ | log("the SIP message was received over IPv6\n" | ||
+ | }; | ||
+ | </ | ||
- | ==== $rs - SIP reply code ==== | + | ==== SCTP ==== |
- | **$rs** - reference | + | This keyword can be used to test the value of 'proto' and check whether the SIP packet was received over SCTP or not. |
- | ==== $rt - Refer-to URI ==== | + | Example of usage: |
+ | <code c> | ||
+ | if(proto==SCTP) | ||
+ | { | ||
+ | log(" | ||
+ | }; | ||
+ | </ | ||
- | **$rt** - reference to URI of refer-to header | + | ==== TCP ==== |
- | ==== $ru - Request URI ==== | + | This keyword can be used to test the value of ' |
- | **$ru** - reference to request' | + | Example of usage: |
+ | <code c> | ||
+ | if(proto==TCP) | ||
+ | { | ||
+ | log("the SIP message was received over TCP\n"); | ||
+ | }; | ||
+ | </ | ||
- | <fc # | + | ==== TLS ==== |
- | ==== $rU - Username in R-URI ==== | + | This keyword can be used to test the value of ' |
- | **$rU** - reference to username in request' | + | Example |
+ | <code c> | ||
+ | if(proto==TLS) | ||
+ | { | ||
+ | log(" | ||
+ | }; | ||
+ | </ | ||
+ | ==== UDP ==== | ||
- | <fc # | + | This keyword |
- | ==== $rv - SIP message | + | Example of usage: |
+ | <code c> | ||
+ | if(proto==UDP) | ||
+ | { | ||
+ | log(" | ||
+ | }; | ||
+ | </ | ||
- | **$rv** - reference to SIP message (reply or request) version | + | ==== WS ==== |
- | ==== $ruid - Record internal Unique ID ==== | + | |
- | **$ruid** - the Record internal Unique ID for the location record selected by calling registrar: | + | This keyword can be used to test the value of ' |
- | ==== $rz - URI Scheme | + | Example |
+ | <code c> | ||
+ | if(proto==WS) | ||
+ | { | ||
+ | log(" | ||
+ | }; | ||
+ | </ | ||
- | **$rz** - returns R-URI scheme, possible values: sip, sips, tel, tels and urn, R-URI scheme parsing error should be reflected by value: none | ||
- | ==== $RAi - Received advertised IP address | + | ==== WSS ==== |
- | **$RAi** - reference | + | This keyword can be used to test the value of ' |
- | ==== $RAp - Received advertised port ==== | + | Example of usage: |
+ | <code c> | ||
+ | if(proto==WSS) | ||
+ | { | ||
+ | log(" | ||
+ | }; | ||
+ | </ | ||
+ | ==== max_len | ||
- | **$RAp** - reference to advertised port where the request has been received, or $Rp if no advertised port. | + | Note: This command was removed. |
- | ==== $Ri - Received IP address ==== | ||
- | **$Ri** - reference to IP address of the interface where the request has been received | + | ==== myself |
- | ==== $Rp - Received port ==== | + | |
- | **$Rp** - reference to the port where the message was received | + | This is a reference to the list of local IP addresses, hostnames and aliases that has been set in the Kamailio configuration file. This lists contain the domains served by Kamailio. |
- | ==== $RAu - Advertised socket | + | The variable can be used to test if the host part of an URI is in the list. The usefulness of this test is to select the messages that has to be processed locally or has to be forwarded to another server. |
- | **$RAu** - local socket where the SIP messages was received in URI format, without transport parameter for UDP, using advertised address when available. | + | See " |
- | ==== $RAut - Advertised socket URI ==== | + | Example of usage: |
+ | <code c> | ||
+ | if(uri==myself) { | ||
+ | log(" | ||
+ | }; | ||
+ | </ | ||
- | **$RAut** - local socket where the SIP messages was received in URI format, always with transport parameter, using advertised address when available. | + | Note: You can also use the is_myself() function. |
+ | ===== Core parameters ===== | ||
- | ==== $Ru - Received socket URI ==== | + | ==== advertised_address |
- | **$Ru** - local socket where the SIP messages was received in URI format, without transport parameter for UDP. | + | It can be an IP address or string and represents the address advertised in Via header. If empty or not set (default value) the socket |
+ | address from where the request will be sent is used. | ||
- | ==== $Rut - Received socket URI ==== | + | WARNING: |
+ | | ||
+ | - you can set anything here, no check is made (e.g. foo.bar will be accepted even if foo.bar doesn' | ||
- | **$Rut** - local socket where the SIP messages was received in URI format, always with transport parameter. | + | Example of usage: |
- | ==== $sbranch(attr) - Static Branch ==== | + | advertised_address=" |
+ | advertised_address=" | ||
- | **$sbranch(attr)** - class of variables allowing to manage the values of attributes | + | Note: this option may be deprecated and removed in the near future, it is recommended to set **advertise** option |
+ | ==== advertised_port ==== | ||
- | The **attr** can be any of the supported values for **$branch(attr)** class of variables -- see above for proper details. | + | The port advertised in Via header. If empty or not set (default value) the port from where the message will be sent is used. Same warnings as for ' |
Example of usage: | Example of usage: | ||
- | <code c> | + | advertised_port=5080 |
- | sbranch_reset(); | + | |
- | $sbranch(uri) = "sip:127.0.0.1: | + | Note: this option may be deprecated and removed in the near future, it is recommended to set **advertise** option for **listen** parameter. |
- | $sbranch(dst_uri) | + | ==== alias ==== |
- | $sbranch(path) = " | + | |
- | $sbranch(send_socket) | + | Parameter to set alias hostnames for the server. It can be set many times, each value being added in a list to match the hostname when ' |
- | sbranch_set_ruri(); | + | |
+ | It is necessary to include the port (the port value used in the "port=" | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | < | ||
+ | alias=other.domain.com:5060 | ||
+ | alias=another.domain.com:5060 | ||
</ | </ | ||
- | ==== $sf - Script flags ==== | + | Note: the hostname has to be enclosed in between quotes if it has reserved tokens such as **forward**, |
+ | ==== async_workers | ||
- | **$sf** - reference | + | Specify how many child processes (workers) |
- | ==== $sF - Script flags ==== | + | Default: 0 (asynchronous framework is disabled). |
- | **$sF** - reference to script flags - hexa output | + | Example: |
- | ==== $si - Source IP address ==== | + | < |
+ | async_workers=4 | ||
+ | </ | ||
- | **$si** - reference to IP source address of the message - see also $siz | + | ==== async_nonblock ==== |
- | ==== $siz - Source IP address ==== | + | Set the non-block mode for the internal sockets used by default group of async workers. |
- | **$siz** - reference to IP source address of the message, with enclosing square brackets for IPv6 | + | Default: 0 |
- | ==== $sp - Source port ==== | + | Example: |
- | **$sp** - reference to the source port of the message | + | < |
+ | async_nonblock=1 | ||
+ | </ | ||
- | ==== $stat(name) - Statistics | + | ==== async_usleep |
- | **$stat(name)** - return | + | Set the number |
- | ==== $su - Source address as URI ==== | + | Default: 0 |
+ | Example: | ||
- | **$su** - returns the representation of source address (ip, port, proto) as SIP URI. If the proto is UDP, then it is not added (being the default transport protocol). | + | < |
+ | async_usleep=100 | ||
+ | </ | ||
- | Its value looks like: | + | ==== async_workers_group ==== |
+ | |||
+ | Define groups of asynchronous worker processes. | ||
+ | |||
+ | Prototype: | ||
< | < | ||
- | "sip: | + | async_workers_group="name=X; |
- | " | + | |
</ | </ | ||
- | Note that WS and WSS are both represented by transport=ws, | + | The attributes |
- | ==== $sut - Source address | + | * **name** |
+ | * **workers** - the number of processes to create for this group | ||
+ | * **nonblock** - set or not set the non-block flag for internal communication socket | ||
+ | * **usleep** - the number of microseconds to sleep before trying to receive next task (can be useful if nonblock=1) | ||
- | **$sut** - returns the representation of source address (ip, port, proto) as full SIP URI. The proto UDP is added also as transport parameter. | + | Default: "" |
- | Its value looks like: | + | Example: |
< | < | ||
- | "sip:ip:port;transport=proto" | + | async_workers_group="name=reg; |
</ | </ | ||
- | ==== $td - To URI Domain ==== | ||
- | **$td** - reference to domain in URI of ' | + | If the **name** is default, then it overwrites the value set by **async_workers**. |
- | ==== $tn - To display name ==== | + | See also **event_route[core: |
- | **$tn** - reference to display name of ' | + | ==== auto_aliases ==== |
- | ==== $tt - To tag ==== | + | Kamailio by default discovers all IPv4 addresses on all interfaces and does a reverse DNS lookup on these addresses to find host names. Discovered host names are added to aliases list, matching the **myself** condition. |
- | **$tt** - reference to tag parameter of ' | + | Example: |
- | ==== $tti - Initial To tag ==== | + | < |
+ | auto_aliases=no | ||
+ | </ | ||
+ | ==== auto_bind_ipv6 | ||
- | **$tti** - reference | + | When turned on, Kamailio will automatically bind to all IPv6 addresses |
- | The value To tag in the initial transaction can be in the From tag, if the request within the dialog is sent by the callee. This variable detect who sent the request within the dialog and returns the proper value that was in the To tag of the transaction initiating the dialog. | + | Example: |
- | It is exported by **rr** module and has to be used after loose_route(). The append_fromtag parameter is required to be set to 1 in order to have this variable returning the right value. | + | < |
- | ==== $tu - To URI ==== | + | auto_bind_ipv6=1 |
+ | </ | ||
- | **$tu** - reference to URI of ' | + | ==== bind_ipv6_link_local ==== |
- | ==== $tU - To URI Username ==== | + | If set to 1, try to bind also IPv6 link local addresses by discovering the scope of the interface. This apply for UDP socket for now, to be added for the other protocols. Default is 0. |
- | **$tU** - reference to username in URI of ' | + | Example: |
- | ==== $Tb - Startup timestamp | + | < |
+ | bind_ipv6_link_local=1 | ||
+ | </ | ||
+ | ==== check_via | ||
- | **$Tb** - reference to unix timestamp of the time at which kamailio was started | + | Check if the address in top most via of replies is local. Default value is 0 (check disabled). |
- | ==== $Tf - String formatted time - cached ==== | + | Example of usage: |
- | **$Tf** - reference string formatted time | + | check_via=1 |
- | Note: the system time is retrieved only once for each processed SIP message. Subsequent calls of $Tf for same SIP message will return same value. | + | ==== children ==== |
- | ==== $TF - String formatted time - current ==== | + | Number of children to fork for the UDP interfaces (one set for each interface |
- | **$TF** - reference string formatted time | + | For configuration of the TCP/TLS worker threads see the option " |
- | Note: the system time is computed for each call of $TF. Subsequent calls of $TF for same SIP message may return different values. | + | Example of usage: |
- | ==== $Ts - Unix time stamp - cached ==== | + | children=16 |
- | **$Ts** - reference to unix time stamp | + | ==== chroot ==== |
- | Note: the system | + | The value must be a valid path in the system. |
- | ==== $TS - Unix time stamp - current ==== | + | Example of usage: |
- | **$TS** - reference to unix time stamp | + | chroot=/ |
- | Note: the system time is computed for each call of $TS. Subsequent calls of $TS for same SIP message may return different values. | ||
- | ==== $ua - User agent header | + | ==== corelog |
- | **$ua** - reference | + | Set the debug level used to print some log messages from core, which might become annoying and don't represent critical errors. For example, such case is failure to parse incoming traffic from the network as SIP message, due to someone sending invalid content. |
- | ==== $version() - version ==== | + | Default value is -1 (L_ERR). |
- | **$version(num)** - version as number | + | Example of usage: |
- | **$version(full)** - full version string "name version architecture/platform" | + | < |
+ | corelog=1 | ||
+ | </code> | ||
+ | ==== debug ==== | ||
- | **$version(hash)** - TBA | + | Set the debug level. Higher values make Kamailio to print more debug messages. Log messages are usually sent to syslog, except if logging to stderr was activated |
- | ===== $env(NAME) - environment variables ===== | + | The following log levels are defined: |
- | **$env(NAME)** | + | |
+ | | ||
+ | | ||
+ | | ||
+ | | ||
+ | | ||
+ | | ||
+ | | ||
+ | | ||
- | ===== $avp(id) - AVPs ===== | + | A log message will be logged if its log-level is lower than the defined debug level. Log messages are either produced by the the code, or manually in the configuration script using log() or xlog() functions. For a production server you usually use a log value between |
- | **$avp(id)** - the value of the AVP identified by ' | + | Default value: L_WARN |
- | **$(avp(id)[N])** - represents the value of N-th AVP identified by ' | + | Examples |
- | The ' | + | * debug=3: print all log messages. This is only useful for debugging of problems. Note: this produces a lot of data and therefore should not be used on production servers (on a busy server this can easily fill up your hard disk with log messages) |
+ | * debug=0: This will only log warning, errors and more critical messages. | ||
+ | * debug=-6: This will disable all log messages. | ||
- | * " | + | Value of 'debug' |
- | | + | |
- | | + | |
+ | kamcmd cfg.set_now_int core debug -- -1 | ||
- | $(avp(id)[0]) can be written in shorter form as $avp(id) and $avp(s:name) as $avp(name). | + | Note: There is a difference in log-levels between Kamailio 3.x and Kamailio< |
+ | |||
+ | For configuration of logging of the memory manager see the parameters | ||
+ | |||
+ | Further information | ||
+ | |||
+ | ==== description ==== | ||
+ | |||
+ | **Alias name: descr desc** | ||
+ | |||
+ | ==== disable_core_dump ==== | ||
+ | |||
+ | Can be ' | ||
+ | |||
+ | Default value is ' | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | disable_core_dump=yes | ||
+ | |||
+ | ==== disable_tls ==== | ||
+ | |||
+ | **Alias | ||
+ | |||
+ | Global parameter to disable TLS support in the SIP server. Default value is ' | ||
+ | |||
+ | Note: Make sure to load the " | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | disable_tls=yes | ||
+ | |||
+ | In Kamailio TLS is implemented | ||
+ | http:// | ||
+ | ==== enable_tls ==== | ||
+ | |||
+ | **Alias | ||
+ | |||
+ | Reverse Meaning of the disable_tls parameter. See disable_tls parameter. | ||
+ | |||
+ | enable_tls=yes # enable tls support in core | ||
+ | |||
+ | ==== exit_timeout ==== | ||
+ | |||
+ | **Alias name: ser_kill_timeout** | ||
+ | |||
+ | How much time Kamailio will wait for all the shutdown procedures to complete. If this time is exceeded, all the remaining processes are immediately killed and Kamailio exits immediately (it might also generate a core dump if the cleanup part takes too long). | ||
+ | |||
+ | Default: 60 s. Use 0 to disable. | ||
+ | |||
+ | | ||
+ | |||
+ | ==== flags ==== | ||
+ | |||
+ | SIP message (transaction) flags can have string names. | ||
+ | The //name// for flags cannot be used for **branch** or **script flags**(*) | ||
- | AVPs are special variables that are attached to SIP transactions. It is a list of pairs (name, | ||
- | To delete the first AVP with name ' | ||
<code c> | <code c> | ||
- | $avp(id) = $null; | + | ... |
+ | flags | ||
+ | FLAG_ONE | ||
+ | FLAG_TWO | ||
+ | ... | ||
</ | </ | ||
- | To delete all the AVP with name ' | + | (*) The named flags feature was propagated from the source code merge back in 2008 and is not extensively tested. The recommended way of defining flags is using [[cookbooks: |
<code c> | <code c> | ||
- | $(avp(id)[*]) = $null; | + | #!define FLAG_NAME FLAG_BIT |
</ | </ | ||
- | To overwrite | + | |
+ | |||
+ | ==== force_rport ==== | ||
+ | |||
+ | yes/no: Similar to the force_rport() function, but activates symmetric response routing globally. | ||
+ | |||
+ | ==== fork ==== | ||
+ | |||
+ | If set to ' | ||
+ | |||
+ | When set to ' | ||
+ | |||
+ | Default value is 'yes'. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | fork=no | ||
+ | |||
+ | ==== fork_delay ==== | ||
+ | |||
+ | Number of usecs to wait before forking a process. | ||
+ | |||
+ | Default is 0 (don't wait). | ||
+ | |||
+ | Example of usage: | ||
<code c> | <code c> | ||
- | $(avp(id)[*]) | + | fork_delay=5000 |
</ | </ | ||
+ | ==== group ==== | ||
- | The value of an AVP can be integer or string. To assign | + | **Alias name: gid** |
+ | |||
+ | The group id to run Kamailio. | ||
+ | |||
+ | Example | ||
+ | |||
+ | group=" | ||
+ | |||
+ | ==== http_reply_parse ==== | ||
+ | |||
+ | Alias: http_reply_hack | ||
+ | |||
+ | When enabled, Kamailio | ||
+ | |||
+ | Default | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | http_reply_parse=yes | ||
+ | |||
+ | ==== ip_free_bind ==== | ||
+ | |||
+ | Alias: ipfreebind, ip_nonlocal_bind | ||
+ | |||
+ | Control if Kamailio should attempt | ||
+ | |||
+ | Default is 0 (do not bind to non local ip). | ||
Example of usage: | Example of usage: | ||
<code c> | <code c> | ||
- | $avp(x) | + | ip_free_bind |
- | $avp(x) = 2; | + | |
- | $avp(y) = " | + | |
- | if($(avp(x)[1])==1) { | + | |
- | ... | + | |
- | } | + | |
- | $(avp(x)[1]) = $null; | + | |
</ | </ | ||
- | It is R/W variable (you can assign values to it directly in configuration file). | ||
- | ===== $expires(key) - Expires Values ===== | + | ==== ipv6_hex_style |
- | Return the min and max of expires value for current SIP message. Contact headers are checked with higher priority, if no expires parameter there, then Expires header is used | + | Can be set to " |
- | If none is found, $null is returned. | + | Default |
- | Possible ' | + | " |
- | * $expires(min) - the minimum value for expires | + | Example of usage: |
- | * $expires(max) - the maximum value for expires | + | |
- | When there is only one expires value, then min and max return the same. | + | <code c> |
+ | ipv6_hex_style = " | ||
+ | </ | ||
+ | ==== kemi.onsend_route_callback ==== | ||
- | Example | + | Set the name of callback function in the KEMI script to be executed as the equivalent of `onsend_route` block (from the native configuration file). |
+ | |||
+ | Default value: ksr_onsend_route | ||
+ | |||
+ | Set it to empty string or " | ||
+ | |||
+ | Example: | ||
<code c> | <code c> | ||
- | if($expires(max)!=$null) { | + | kemi.onsend_route_callback="ksr_my_onsend_route" |
- | xlog("max expires value is: $expires(max)\n"); | + | |
- | } | + | |
</ | </ | ||
- | ===== $xavp(id) - XAVPs ===== | + | ==== kemi.received_route_callback |
+ | |||
+ | Set the name of callback function in the KEMI script to be executed as the equivalent of `event_route[core: | ||
+ | |||
+ | Default value: none | ||
+ | |||
+ | Set it to empty string or " | ||
+ | |||
+ | Example: | ||
- | xavp - extended AVP's - are structures that can store multiple values. They work like a stack, much like AVPs, and are attached to SIP transactions. Each xavp has a name and can contain multiple named values, the structure name and the value name are separated by < | ||
<code c> | <code c> | ||
- | $xavp(root=> | + | kemi.received_route_callback="ksr_my_receieved_route" |
</ | </ | ||
- | Like avps, xavp act like a stack. To refer to an existing value, use an index. The newest xavp has index zero [0]. | + | ==== kemi.reply_route_callback ==== |
+ | |||
+ | Set the name of callback function in the KEMI script | ||
+ | |||
+ | Default value: ksr_reply_route | ||
+ | |||
+ | Set it to empty string or " | ||
+ | |||
+ | Example: | ||
<code c> | <code c> | ||
- | $xavp(root[0]=> | + | kemi.onsend_route_callback=" |
</ | </ | ||
- | If you assign a value without an index, a new xavp is allocated and the old one is pushed up the stack, becoming index [1]. Old index [1] becomes [2] etc. | + | ==== kemi.pre_routing_callback ==== |
+ | |||
+ | Set the name of callback function in the KEMI script to be executed as the equivalent of `event_route[core: | ||
+ | |||
+ | Default value: none | ||
+ | |||
+ | Set it to empty string or " | ||
+ | |||
+ | Example: | ||
<code c> | <code c> | ||
- | $xavp(example=> | + | kemi.pre_routing_callback="ksr_pre_routing" |
- | #create new | + | |
- | $xavp(example=> | + | |
- | #add extra value to " | + | |
- | $xavp(example[0]=> | + | |
- | #add value to first variable - " | + | |
- | $xavp(example[1]=> | + | |
</ | </ | ||
+ | ==== latency_cfg_log ==== | ||
+ | |||
+ | If set to a log level less or equal than debug parameter, a log message with the duration in microseconds of executing request route or reply route is printed to syslog. | ||
+ | |||
+ | Default value is 3 (L_DBG). | ||
+ | |||
+ | Example: | ||
- | Another example: | ||
<code c> | <code c> | ||
- | # Create new xavp | + | latency_cfg_log=2 |
- | $xavp(sf=>uri)=" | + | </code> |
- | #assign values | + | ==== latency_limit_action ==== |
- | $xavp(sf[0]=> | + | |
- | $xavp(sf[0]=> | + | |
- | $xavp(sf[0]=> | + | |
- | #create new xavp, moving previous one to sf[1] | + | Limit of latency in us (micro-seconds) for config actions. If a config action executed by cfg interpreter takes longer than its value, a message is printed in the logs, showing config path, line and action name when it is a module function, as well as internal action id. |
- | $xavp(sf=>uri)=" | + | |
- | $xavp(sf[0]=> | + | |
- | $xavp(sf[0]=> | + | |
- | #Create a third xavp | + | Default value is 0 (disabled). |
- | $xavp(sf=>uri)=" | + | |
- | $xavp(sf[0]=> | + | <code c> |
- | $xavp(sf[0]=>fr_inv_timer)=15; | + | latency_limit_action=500 |
- | $xavp(sf[0]=> | + | |
</ | </ | ||
+ | |||
+ | ==== latency_limit_db ==== | ||
- | xavps are read and write variables. You can create multilevel xavps, as xavps may contain xavps. | + | Limit of latency in us (micro-seconds) for db operations. If a db operation executed via DB API v1 takes longer that its value, a message is printed in the logs, showing the first 50 characters of the db query. |
- | ===== $hdr(name) - Headers ===== | ||
+ | Default value is 0 (disabled). | ||
- | **$hdr(name)** - represents the body of first header identified by ' | + | <code c> |
+ | latency_limit_db=500 | ||
+ | </ | ||
- | **$(hdr(name)[N])** - represents the body of the N-th header identified by ' | ||
- | If [N] is omitted then the body of the first header is printed. The first header is got when N=0, for the second N=1, a.s.o. In case of a comma-separated multi-body headers, it returns all the bodies, comma-separated. To print the last header of that type, use -1, or other negative values to count from the end. No white spaces are allowed inside the specifier | + | ==== latency_log ==== |
+ | |||
+ | Log level to print the messages related to latency. | ||
+ | |||
+ | |||
+ | Default value is -1 (L_ERR). | ||
+ | |||
+ | <code c> | ||
+ | latency_log=3 | ||
+ | </ | ||
+ | |||
+ | ==== listen ==== | ||
- | The module | + | Set the network addresses the SIP server |
Example of usage: | Example of usage: | ||
<code c> | <code c> | ||
- | if($hdr(From)=~" | + | listen=10.10.10.10 |
- | ... | + | |
- | } | + | listen=udp: |
</ | </ | ||
- | <fc # | + | If you omit this directive then the SIP server will listen on all interfaces. On start the SIP server reports all the interfaces that it is listening on. Even if you specify |
- | ===== $hdrc(name) - Number of Headers ===== | + | If you specify IPv6 addresses, you should put them into square brackets, e.g.: |
- | **$hdrc(name)** - get the number of headers with the respective name | + | <code c> |
+ | listen=udp: | ||
+ | </ | ||
- | Example of usage: | + | You can specify an advertise address (like ip:port) per listening socket - it will be used to build headers such as Via and Record-Route: |
<code c> | <code c> | ||
- | if($hdrc(Via) | + | listen=udp: |
- | ... | + | |
- | } | + | |
</ | </ | ||
- | ===== $var(name) - Private memory variables | + | The advertise address must be the format ' |
- | **$var(name)** - refers to variables | + | A typical use case for advertise address is when running SIP server behind a NAT/ |
+ | |||
+ | A unique name can be set for sockets to simplify the selection of the socket for sending out. For example, the rr and path modules can use the socket name to advertise it in header URI parameter and use it as a shortcut to select the corresponding socket for routing subsequent requests. | ||
+ | |||
+ | The name has to be provided as a string enclosed in between quotes after the **name** | ||
+ | |||
+ | <code c> | ||
+ | listen=udp: | ||
+ | listen=udp: | ||
+ | listen=udp: | ||
+ | listen=udp: | ||
+ | ... | ||
+ | $fsn = " | ||
+ | t_relay(); | ||
+ | </ | ||
+ | |||
+ | Note that there is no internal check for uniqueness of the socket names, the admin has to ensure it in order to be sure the desired socket is selected, otherwise the first socket with a matching name is used. | ||
+ | ==== loadmodule ==== | ||
+ | |||
+ | Loads a module for later usage in the configuration script. The modules is searched in the path specified by **loadpath**. | ||
+ | |||
+ | Prototype: **loadmodule " | ||
+ | |||
+ | If modulepath is only modulename | ||
Example of usage: | Example of usage: | ||
+ | <code c> | ||
+ | loadpath "/ | ||
+ | |||
+ | loadmodule "/ | ||
+ | loadmodule " | ||
+ | loadmodule " | ||
+ | loadmodule " | ||
+ | </ | ||
+ | |||
+ | ==== loadmodulex ==== | ||
+ | |||
+ | Similar to **loadmodule** with the ability to evaluate variables in its parameter. | ||
+ | |||
+ | ==== loadpath ==== | ||
+ | |||
+ | **Alias name: mpath** | ||
+ | |||
+ | Set the module search path. loadpath takes a list of directories separated by ':' | ||
+ | |||
+ | This can be used to simplify the loadmodule parameter and can include many paths separated by colon. First module found is used. | ||
+ | |||
+ | Example of usage: | ||
<code c> | <code c> | ||
- | $var(a) = 2; #-- sets the value of variable ' | + | loadpath |
- | $var(a) = "2"; #-- sets the value of variable ' | + | |
- | $var(a) = "sip:" | + | |
- | $var(a) = 3 + (7& | + | |
- | if( $var(a) & 4 ) { | + | loadmodule " |
- | xlog("var a has third bit set\n"); | + | |
- | } | + | |
+ | loadmodule " | ||
+ | loadmodule " | ||
</ | </ | ||
- | **Note:** Setting | + | The proxy tries to find the modules in a smart way, e.g: loadmodule " |
+ | |||
+ | ==== local_rport ==== | ||
+ | |||
+ | Similar to **add_local_rport()** function, but done in a global scope, so the function does not have to be executed for each request. | ||
+ | |||
+ | Default: off | ||
+ | |||
+ | Example: | ||
<code c> | <code c> | ||
- | $var(x) | + | local_rport |
+ | </ | ||
- | if($var(x)==0) { # this is true | + | ==== log_engine_data ==== |
- | ... | + | |
- | } | + | Set specific data required by the log engine. See also the **log_engine_type**. |
+ | |||
+ | <code c> | ||
+ | log_engine_type=" | ||
+ | log_engine_data=" | ||
</ | </ | ||
- | **Note:** A script variable persists over the Kamailio process in which it was initialized, | ||
- | <fc #0000FF>It is R/W variable (you can assign values to it directly in configuration file)</fc> | + | ==== log_engine_type ==== |
+ | |||
+ | Specify what logging engine to be used and its initialization data. A logging engine is implemented as a module. Supported values are a matter of the module. | ||
+ | |||
+ | For example, see the readme of **log_custom** module for more details. | ||
+ | |||
+ | <code c> | ||
+ | log_engine_type=" | ||
+ | log_engine_data=" | ||
+ | </code> | ||
- | **pv** module can be used to initialize the script variables. | ||
- | ===== $vz(name) - Private memory variables (zero) ===== | + | ==== log_facility |
- | Same as $var(name) -- added to pair with $vn(name). | + | If Kamailio logs to syslog, you can control the facility for logging. Very useful when you want to divert all Kamailio logs to a different log file. See the man page syslog(3) for more details. |
- | ===== $vn(name) | + | For more see: http:// |
- | Similar to $var(name) and able to hold $null (which is the default | + | Default |
Example of usage: | Example of usage: | ||
- | <code c> | + | log_facility=LOG_LOCAL0 |
- | $vn(x) | + | |
- | $vn(x) = " | + | |
- | $vn(x) = $null; | + | |
- | if($vn(x) | + | ==== log_name ==== |
+ | |||
+ | Allows to configure a log_name prefix which will be used when printing to syslog -- it is also known as syslog tag, and the default value is the application name or full path that printed the log message. This is useful to filter log messages when running many instances of Kamailio on same server. | ||
+ | |||
+ | < | ||
+ | log_name=" | ||
</ | </ | ||
- | ===== $shv(name) - Shared memory variables ===== | ||
- | **$shv(name)** | + | ==== log_prefix ==== |
- | Example - shv(name) pseudo-variable usage: | + | Specify the text to be prefixed to the log messages printed by Kamailio while processing a SIP message (that is, when executing route blocks). It can contain script variables that are evaluated at runtime. |
+ | See [[# | ||
+ | |||
+ | |||
+ | If a log message is printed from a part of the code executed out of routing blocks actions (e.g., can be timer, evapi worker process, ...), there is no log prefix set, because this one requires a valid SIP message structure to work with. | ||
+ | |||
+ | Example - prefix with message type (1 - request, 2 - response), CSeq and Call-ID: | ||
< | < | ||
- | ... | + | log_prefix="{$mt $hdr(CSeq) $ci} " |
- | modparam(" | + | |
- | ... | + | |
- | if ($shv(debug) == 1) { | + | |
- | xlog(" | + | |
- | } | + | |
- | ... | + | |
</ | </ | ||
- | <fc # | + | ==== log_prefix_mode ==== |
- | ===== $time(name) | + | Control if [[# |
- | **$time(name)** - the PV provides access to broken-down time attributes in the local timezone. | + | If set to 0 (default), then log prefix is evaluated when the sip message is received and then reused (recommended if the **log_prefix** has only variables that have same value for same message). This is the current behaviour of **log_prefix** evaluation. |
- | The ' | + | If set to 1, then the log prefix is evaluated before/ |
- | | + | |
- | | + | |
- | | + | |
- | | + | |
- | * mon - return the month (int 1-12) | + | |
- | * year - return the year (int, e.g., 2008) | + | |
- | * wday - return the day of week (int, 1=Sunday - 7=Saturday) | + | |
- | * yday - return the day of year (int, 1-366) | + | |
- | * isdst - return daylight saving time status (int, 0 - DST off, >0 DST on) | + | |
- | Example - time(name) pseudo-variable | + | Example: |
+ | |||
+ | < | ||
+ | log_prefix_mode=1 | ||
+ | </ | ||
+ | ==== log_stderror ==== | ||
+ | |||
+ | With this parameter you can make Kamailio to write log and debug messages to standard error. Possible values are: | ||
+ | |||
+ | - " | ||
+ | |||
+ | - " | ||
+ | |||
+ | Default value is " | ||
+ | |||
+ | For more see: http:// | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | log_stderror=yes | ||
+ | |||
+ | ==== cfgengine ==== | ||
+ | |||
+ | Set the config interpreter engine for execution of the routing logic inside the configuration file. Default is the native interpreter. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | cfgengine=" | ||
+ | cfgengine " | ||
+ | |||
+ | If name is " | ||
+ | |||
+ | The name can be the identifier of an embedded language interpreter, | ||
+ | |||
+ | cfgengine " | ||
+ | |||
+ | ==== maxbuffer ==== | ||
+ | |||
+ | The size in bytes not to be exceeded during the auto-probing procedure of descovering the maximum buffer size for receiving UDP messages. Default value is 262144. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | maxbuffer=65536 | ||
+ | |||
+ | ==== max_branches ==== | ||
+ | |||
+ | The maximum number of outgoing branches for each SIP request. It has impact on the size of destination set created in core (e.g., via append_branch()) as well as the serial and parallel forking done via tm module. It replaces the old defined constant MAX_BRANCHES. | ||
+ | |||
+ | The value has to be at least 1 and the upper limit is 31. | ||
+ | |||
+ | Default value: 12 | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | < | ||
+ | max_branches=16 | ||
+ | </ | ||
+ | |||
+ | ==== max_recursive_level ==== | ||
+ | |||
+ | The parameters set the value of maximum recursive calls to blocks of actions, such as sub-routes or chained IF-ELSE (for the ELSE branches). Default is 256. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | max_recursive_level=500 | ||
+ | |||
+ | |||
+ | ==== max_while_loops ==== | ||
+ | |||
+ | The parameters set the value of maximum loops that can be done within a " | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | max_while_loops=200 | ||
+ | |||
+ | ==== mcast ==== | ||
+ | |||
+ | This parameter can be used to set the interface that should join the multicast group. This is useful if you want to **listen** on a multicast address and don't want to depend on the kernel routing table for choosing an interface. | ||
+ | |||
+ | The parameter is reset after each **listen** parameter, so you can join the right multicast group on each interface without having to modify kernel routing beforehand. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | mcast=" | ||
+ | listen=udp: | ||
+ | |||
+ | ==== mcast_loopback ==== | ||
+ | |||
+ | It can be ' | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | mcast_loopback=yes | ||
+ | |||
+ | ==== mcast_ttl ==== | ||
+ | |||
+ | Set the value for multicast ttl. Default value is OS specific (usually 1). | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | mcast_ttl=32 | ||
+ | |||
+ | ==== memdbg ==== | ||
+ | |||
+ | **Alias name: mem_dbg** | ||
+ | |||
+ | This parameter specifies on which log level the memory debugger messages will be logged. If memdbg is active, every request (alloc, free) to the memory manager will be logged. (Note: if compile option NO_DEBUG is specified, there will never be logging from the memory manager). | ||
+ | |||
+ | Default value: L_DBG (memdbg=3) | ||
+ | |||
+ | For example, memdbg=2 means that memory debugging is activated if the debug level is 2 or higher. | ||
+ | |||
+ | debug=3 | ||
+ | memdbg=4 | ||
+ | |||
+ | debug=3 | ||
+ | memdbg=2 | ||
+ | |||
+ | Please see also [[#memlog]] and [[# | ||
+ | |||
+ | ==== memlog ==== | ||
+ | |||
+ | **Alias name: mem_log** | ||
+ | |||
+ | This parameter specifies on which log level the memory statistics will be logged. If memlog is active, Kamailio will log memory statistics on shutdown (or if requested via signal SIGUSR1). This can be useful for debugging of memory leaks. | ||
+ | |||
+ | Default value: L_DBG (memlog=3) | ||
+ | |||
+ | For example, memlog=2 means that memory statistics dumping is activated if the debug level is 2 or higher. | ||
+ | |||
+ | debug=3 | ||
+ | memlog=4 | ||
+ | |||
+ | debug=3 | ||
+ | memlog=2 | ||
+ | |||
+ | Please see also [[#memdbg]] and [[# | ||
+ | |||
+ | ==== mem_join ==== | ||
+ | |||
+ | If set to 1, memory manger (e.g., q_malloc) does join of free fragments. It is effective if MEM_JOIN_FREE compile option is defined. | ||
+ | |||
+ | It can be set via config reload framework. | ||
+ | |||
+ | Default is 1 (enabled). | ||
<code c> | <code c> | ||
- | ... | + | mem_join=1 |
- | if ($time(year) | + | |
- | xlog(" | + | |
- | } | + | |
- | ... | + | |
</ | </ | ||
- | ===== $utime(name) - Broken-down time ===== | + | To change its value at runtime, **kamcmd** needs to be used and the modules **ctl** and **cfg_rpc** loaded. Enabling it can be done with: |
- | **$utime(name)** - the PV provides access to broken-down time attributes in UTC. | + | < |
+ | kamcmd cfg.set_now_int core mem_join 1 | ||
+ | </ | ||
- | See **$time(name)** above for the possible attributes | + | To disable, set its value to 0. |
- | ===== $timef(format) - Strftime Formatted Time ===== | + | ==== mem_safety |
- | **$timef(format)** - return current time as formatted by strftime ' | + | If set to 1, memory free operation does not call abort() for double freeing a pointer or freeing an invalid address. The server still prints the alerting log messages. If set to 0, the SIP server stops by calling abort() to generate a core file. |
- | Example: | + | It can be set via config reload framework. |
+ | |||
+ | Default is 1 (enabled). | ||
<code c> | <code c> | ||
- | xlog(" | + | mem_safety=0 |
</ | </ | ||
- | ===== $utimef(format) - Strftime Formatted UTC Time ===== | + | ==== mem_status_mode |
- | **$utimef(format)** - return current time in UTC as formatted by strftime ' | + | If set to 1, memory status dump for qm allocator will print details about used fragments. If set to 0, the dump contains only free fragments. It can be set at runtime via cfg param framework (e.g., via kamcmd). |
- | Example: | + | Default is 0. |
<code c> | <code c> | ||
- | xlog(" | + | mem_status_mode=1 |
</ | </ | ||
- | ===== $sel(name) - Selects ===== | + | ==== mem_summary |
- | **$sel(name)** - return the value of **select** specified by name. **select** refers a class of config variables introduced by SER 2.0, allowing to select and return parts of sip messages and not only. | + | Parameter to control printing of mmemory debugging information displayed on exit or SIGUSR1. The value can be composed by following flags: |
+ | | ||
+ | | ||
+ | | ||
+ | | ||
- | List of available selects: | + | If set to 0, nothing is printed. |
- | * http:// | + | |
+ | Default value: 3 | ||
Example: | Example: | ||
<code c> | <code c> | ||
- | + | mem_summary=15 | |
- | if($sel(via[1].host)==" | + | |
- | { | + | |
- | ... | + | |
- | } | + | |
</ | </ | ||
- | ===== Send Address Attributes ===== | ||
- | ==== $sndfrom(name) | + | ==== mhomed |
- | **$snd(name)** - return attributes of the address from where the request is going to be sent (local socket). | + | Set the server to try to locate outbound interface on multihomed host. This parameter affects the selection of the outgoing socket for forwarding requests. By default is off (0) - it is rather time consuming. When deactivated, |
- | **$sndfrom(name)** - return attributes | + | Example |
- | The name can have same values as for $sndto(...). | + | mhomed=1 |
- | ==== $sndto(name) | + | ==== mlock_pages |
+ | Locks all Kamailio pages into memory making it unswappable (in general one doesn' | ||
- | **$sndto(name)** - return attributes of the address to where the request is going to be sent (remote socket). | + | mlock_pages = yes |no (default no) |
- | They are available in **onsend_route**. The name can be: | + | ==== modinit_delay ==== |
- | * ip - IP address | + | Number |
- | * af - address family | + | |
- | * port - port of destination address | + | Default value is 0 (no wait). |
- | * proto - transport protocol to be used to send (numeric) | + | |
- | * sproto - transport protocol to be used to send (string) | + | < |
- | * buf - entire send buffer as string | + | modinit_delay=100000 |
- | * len - length | + | </ |
+ | |||
+ | ==== modparam ==== | ||
+ | |||
+ | The modparam command will be used to set the options | ||
Example: | Example: | ||
- | <code c> | + | modparam(" |
+ | modparam(" | ||
- | onsend_route | + | See the documenation of the respective module to find out the available options. |
- | if($snd(ip)=="10.10.10.10") | + | |
- | | + | ==== modparamx ==== |
- | ... | + | |
- | } | + | Similar to **modparam**, |
- | } | + | ==== onsend_route_reply ==== |
+ | |||
+ | If set to 1 (yes, on), onsend_route | ||
+ | |||
+ | onsend_route_reply=yes | ||
+ | |||
+ | ==== open_files_limit ==== | ||
+ | |||
+ | If set and bigger than the current open file limit, Kamailio will try to increase its open file limit to this number. Note: Kamailio must be started as root to be able to increase a limit past the hard limit (which, for open files, is 1024 on most systems). " | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | open_files_limit=2048 | ||
+ | |||
+ | ==== phone2tel ==== | ||
+ | By enabling this feature, Kamailio internally treats SIP URIs with user=phone parameter as TEL URIs. If you do not want this behavior, you have to turn it off. | ||
+ | |||
+ | Default value: 1 (enabled) | ||
+ | |||
+ | | ||
+ | |||
+ | |||
+ | ==== pmtu_discovery ==== | ||
+ | If enabled, the Don't Fragment (DF) bit will be set in outbound IP packets. | ||
+ | |||
+ | pmtu_discovery = 0 | 1 (default 0) | ||
+ | |||
+ | ==== port ==== | ||
+ | |||
+ | The port the SIP server listens to. The default value for it is 5060. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | | ||
+ | |||
+ | ==== pv_buffer_size ==== | ||
+ | |||
+ | The size in bytes of internal buffer to print dynamic strings with pseudo-variables inside. The default value is 8192 (8kB). Please keep in mind that for xlog messages, there is a dedicated module parameter to set the internal buffer size. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | < | ||
+ | pv_buffer_size=2048 | ||
</ | </ | ||
- | ===== Benchmark module Pseudo-Variables ===== | + | ==== pv_buffer_slots |
- | ==== $BM_time_diff ==== | + | The number |
- | $BM_time_diff - the time difference elapsed between calls of bm_start_timer(name) and bm_log_timer(name). The value is 0 if no bm_log_timer() was called. | + | |
- | ===== Dialog module Pseudo-Variables ===== | + | Example of usage: |
- | ==== $dlg(attr) ==== | + | < |
+ | pv_buffer_slots=12 | ||
+ | </ | ||
- | Return the attribute of the current processed dialog. | + | ==== pv_cache_limit ==== |
- | <fc # | + | The limit how many pv declarations in the cache after which an action |
- | The ' | + | < |
- | * h_id - hash id | + | pv_cache_limit=1024 |
- | * h_entry - hash entry | + | </ |
- | * ref - reference count | + | |
- | * state - state of dialog | + | |
- | * to_rs - To route set | + | |
- | * from_rs - From route set | + | |
- | * dflags - dialog internal flags | + | |
- | * sflags - dialog script flags | + | |
- | * callid - sip call id | + | |
- | * to_uri - To uri | + | |
- | * to_tag - To tag | + | |
- | * from_uri - From uri | + | |
- | * from_tag - From tag | + | |
- | * toroute - timeout route | + | |
- | * lifetime - timeout inteval | + | |
- | * start_ts - start timestamp | + | |
- | * to_cseq - To CSeq | + | |
- | * from_cseq - From CSeq | + | |
- | * to_contact - To contact address | + | |
- | * from_contact - From contact address | + | |
- | * to_bindaddr - To bind address | + | |
- | * from_bindaddr - From bind address | + | |
- | ==== $dlg_ctx(attr) | + | ==== pv_cache_action |
- | Return | + | Specify what action to be done when the size of pv cache is exceeded. If 0, print an warning log message when the limit is exceeded. If 1, warning log messages is printed and the cache systems tries to drop a $sht(...) declaration. Default is 0. |
- | <fc #0000ff>Some of the attributes are R/W variables.</fc> | + | <code> |
+ | pv_cache_action=1 | ||
+ | </code> | ||
- | The ' | + | ==== rundir ==== |
- | * set - returns 1 if the dialog for current context is set, 0 otherwise | + | |
- | * flags - get/set dialog flags | + | |
- | * timeout_route - get/set route name to be executed on timeout | + | |
- | * timeout_route_id - get internal id for the route to be executed on timeout | + | |
- | * timeout_bye - set to 1 if BYE has to be sent when dialog lifetime elapses | + | |
- | * timeout - set the dialog lifetime (in seconds) | + | |
- | * on - get/set an integer value associated with the context (cfg usage) | + | |
- | * dir - get direction of the request for the dialog of the current context (0 - unknown, 1 - downstream, 2 - upstream) | + | |
- | ==== $dlg_var(key) ==== | + | Alias: run_dir |
- | Store and retrieve custom variable | + | Set the folder |
- | <fc # | + | Default: |
- | The ' | + | Example of usage: |
- | ===== Erlang module Pseudo-Variables ===== | + | < |
+ | rundir="/ | ||
+ | </ | ||
- | ==== Erlang pseudo-variable attributes | + | ==== received_route_mode ==== |
- | * type - get variable type. Possible types are: atom, integer, list, string, tuple, pid and ref. | + | Enable or disable the execution of event_route[core:msg-received] routing block or its corresponding Kemi callback. |
- | * length - get length of list or tuple. | + | Default value: 0 (disabled) |
- | * format - prints a term, in clear text. It tries to resemble the term printing in the Erlang shell. | + | Example of usage: |
- | ==== $erl_atom(name) | + | <code c> |
- | // | + | received_route_mode=1 |
- | Erlang atom is a literal, a constant with name. Formatted output pseudo variable | + | </ |
- | atom could be enclosed | + | |
- | lower-case letter or if it contains | + | ==== reply_to_via |
- | underscore | + | |
+ | If it is set to 1, any local reply is sent to the IP address advertised | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | reply_to_via=0 | ||
+ | |||
+ | |||
+ | ==== route_locks_size ==== | ||
+ | |||
+ | Set the number of mutex locks to be used for synchronizing the execution of config script for messages sharing the same Call-Id. In other words, enables Kamailio to execute the config script sequentially for the requests and replies received within the same dialog -- a new message received within the same dialog waits until the previous one is routed out. | ||
+ | |||
+ | For smaller impact on parallel processing, its value it should be at least twice the number of Kamailio processes | ||
Example: | Example: | ||
<code c> | <code c> | ||
- | $erl_atom(A) | + | route_locks_size |
- | + | ||
- | xlogl(" | + | |
</ | </ | ||
- | ==== $erl_list(name) | + | Note that ordering of the SIP messages can still be changed by network transmission (quite likely for UDP, especially on long distance paths) or CPU allocation for processes when executing pre-config and post-config tasks (very low chance, but not to be ruled out completely). |
- | Compound data type with a variable number of terms. Formally, a list is either | + | ==== server_id |
- | the empty list [] or consists of one or more elements. | + | |
- | Example: | + | A configurable unique server id that can be used to discriminate server instances within a cluster of servers when all other information, |
<code c> | <code c> | ||
- | $erl_atom(E) | + | server_id |
- | $erl_list(L) = " | + | </ |
- | $erl_list(L) = " | + | |
- | $erl_list(L) = $erl_atom(E); | + | |
- | xlogl(" | + | ==== server_header ==== |
- | # empty list | + | Set the value of Server header for replies generated by Kamailio. It must contain the header name, but not the ending CRLF. |
- | $erl_tuple(E[*]) | + | |
+ | Example of usage: | ||
+ | |||
+ | <code c> | ||
+ | server_header=" | ||
</ | </ | ||
- | ==== $erl_tuple(name) | + | ==== server_signature |
- | From the Erlang point of view the tuple compound data type with a fixed number | + | |
- | of terms. The module implementation of tuple has the same behavior as the list. | + | |
- | Example: | + | This parameter controls the " |
+ | |||
+ | Example | ||
+ | |||
+ | | ||
+ | |||
+ | If it is enabled (default=yes) a header is generated as in the following example: | ||
+ | |||
+ | | ||
+ | |||
+ | ==== shm_force_alloc ==== | ||
+ | Tries to pre-fault all the shared memory, before starting. When " | ||
+ | |||
+ | shm_force_alloc = yes | no (default no) | ||
+ | |||
+ | ==== shm_mem_size ==== | ||
+ | |||
+ | Set shared memory size (in Mb). | ||
+ | |||
+ | shm_mem_size = 64 (default 64) | ||
+ | |||
+ | ==== sip_parser_log ==== | ||
+ | |||
+ | Log level for printing debug messages for some of the SIP parsing errors. | ||
+ | |||
+ | Default: 0 (L_WARN) | ||
<code c> | <code c> | ||
- | $erl_atom(e) | + | sip_parser_log |
+ | </ | ||
- | $erl_tuple(T) | + | ==== sip_parser_mode ==== |
- | $erl_tuple(T) | + | |
- | xlogl(" | + | Control sip parser behaviour. |
+ | |||
+ | If set to 1, the parser is more strict in accepting messages that have invalid headers | ||
+ | |||
+ | If set to 0, the parser is less strict on checking validity of headers. | ||
+ | |||
+ | Default: 1 | ||
+ | |||
+ | <code c> | ||
+ | sip_parser_mode | ||
</ | </ | ||
- | ==== $erl_pid(name) ==== | + | ==== sip_warning |
- | Holds Eralng process identifier. Provides access to Erlang PID value and could | + | |
- | be used in send message. | + | |
- | ==== $erl_ref(name) ==== | + | Can be 0 or 1. If set to 1 (default |
- | Holds Erlang reference. Provides access | + | The header contains several details that help troubleshooting using the network traffic dumps, but might reveal details of your network infrastructure and internal SIP routing. |
- | send message. | + | |
- | ==== $erl_xbuff(name) ==== | + | Example of usage: |
- | Generic pseudo variable to acts as other pseudo variables exported from Erlang | + | |
- | module. | + | |
- | ===== HTable module Pseudo-Variables ===== | + | sip_warning=0 |
- | ==== $sht(htable=> | + | ==== socket_workers |
- | Access hash table entries. | + | Number of workers to process SIP traffic per listen socket - typical use is before a **listen** global parameter. |
- | <fc # | + | * when used before **listen** on UDP or SCTP socket, it overwrites **children** or **sctp_children** value for that socket. |
+ | * when used before **listen** on TCP or TLS socket, | ||
- | The “htname” must be a hash table name defined via “htable” parameter. | + | The value of **socket_workers** is reset with next **listen** socket definition that is added, thus use it for each **listen** socket where you want custom number of workers. |
- | The “key” can be: | + | If this parameter is not used at all, the values for **children**, |
- | * static string - set of characters without pseudo-variables | + | Example for udp sockets: |
- | * dynamic string - set of characters that include pseudo-variables. The pseudo-variables will be evaluated at runtime. | + | |
- | < | + | < |
- | ... | + | children=4 |
- | modparam(" | + | socket_workers=2 |
- | ... | + | listen=udp: |
- | $sht(a=> | + | listen=udp:127.0.0.1:5070 |
- | $sht(a=>$ru) = $fu; | + | listen=udp:127.0.0.1:5060 |
- | ... | + | |
</ | </ | ||
- | ==== $shtex(htable=> | + | * it will start 2 workers to handle traffic on udp: |
- | Access hash table entry expire value. Value represents the seconds until the htable entry will expire and be deleted from htable. | + | Example for tcp sockets: |
- | <fc #0000ff>It is R/W variable, you can assign values to it directly in configuration file.</fc> | + | <code c> |
+ | children=4 | ||
+ | socket_workers=2 | ||
+ | listen=tcp: | ||
+ | listen=tcp: | ||
+ | listen=tcp: | ||
+ | </code> | ||
- | The “htname” must be a hash table name defined via “htable” parameter | + | * it will start 2 workers to handle traffic on tcp: |
- | The “key” can be: | + | ==== sql_buffer_size ==== |
- | * static string - set of characters without pseudo-variables | + | The size in bytes of the SQL buffer created for data base queries. For database drivers that use the core db_query library, this will be maximum size object that can be written or read from a database. Default value is 65535. |
- | * dynamic string - set of characters that include pseudo-variables. The pseudo-variables | + | |
+ | Example of usage: | ||
+ | |||
+ | sql_buffer_size=131070 | ||
+ | |||
+ | |||
+ | ==== statistics ==== | ||
+ | |||
+ | Kamailio has built-in support for statistics counter. This means, these counters can be increased, decreased, read and cleared. The statistics counter are defined either by the core (e.g. tcp counters), by modules (e.g. 2xx_transactions by " | ||
+ | |||
+ | The statistics counters are read/ | ||
+ | |||
+ | Following are some examples how to access statistics variables: | ||
+ | |||
+ | **script** | ||
< | < | ||
- | ... | + | modparam(" |
- | modparam(" | + | |
- | ... | + | (if method |
- | $sht(a=> | + | update_stat(" |
- | $shtex(a=>$au) = 10; | + | } |
- | ... | + | |
+ | xlog(" | ||
</ | </ | ||
+ | **MI** | ||
+ | < | ||
+ | # get counter value | ||
+ | kamctl fifo get_statistics NOTIFY | ||
+ | # set counter to zero | ||
+ | kamctl fifo reset_statistics NOTIFY | ||
+ | # get counter value and then set it to zero | ||
+ | kamctl fifo clear_statistics NOTIFY | ||
+ | # or use the kamcmd tool | ||
+ | kamcmd mi get_statistics 1xx_replies | ||
+ | </ | ||
- | ==== $shtcn(htable=> | ||
- | Count items matching the name by regexp. | + | ==== stats_name_separator ==== |
- | The “htname” must be a hash table name defined via “htable” parameter. | + | Specify the character used as a separator for the internal statistics' |
+ | Default value is " | ||
- | The **exp** can be: | + | Example of usage: |
- | * reqexp - match by regular expression ' | + | stats_name_separator |
- | * ~~regexp - match by regular expression ' | + | |
- | * ~%prefix - match by right prefix | + | |
- | * %~prefix - match by left prefix | + | |
- | * ==value - match by string value | + | |
- | * eqvalue - match by integer value | + | |
- | * * * - (two asterisks next to each other) | + | |
- | The **exp** can contain pseudo-variables. | + | ==== tos ==== |
- | < | + | The TOS (Type Of Service) to be used for the sent IP packages (both TCP and UDP). |
- | ... | + | |
- | modparam(" | + | Example of usage: |
- | ... | + | |
- | $sht(a=>abc) = 1; | + | tos=IPTOS_LOWDELAY |
- | $shtex(a=> | + | tos=0x10 |
- | xlog("$shtcn(a=>a.*)"); | + | tos=IPTOS_RELIABILITY |
- | ... | + | |
+ | ==== udp_mtu ==== | ||
+ | Fallback to another protocol (udp_mtu_try_proto must be set also either globally or per packet) if the constructed request size is greater then udp_mtu. | ||
+ | |||
+ | RFC 3261 specified size: 1300. Default: 0 (off). | ||
+ | |||
+ | udp_mtu | ||
+ | |||
+ | ==== udp_mtu_try_proto ==== | ||
+ | |||
+ | If udp_mtu !=0 and udp forwarded request size (after adding all the "local" headers) | ||
+ | |||
+ | **Warning:** Although RFC3261 mandates automatic transport protocol changing, enabling this feature can lead to problems with clients which do not support other protocols or are behind a firewall or NAT. Use this only when you know what you do! | ||
+ | |||
+ | See also udp_mtu_try_proto(proto) function. | ||
+ | |||
+ | Default: UDP (off). Recommended: | ||
+ | |||
+ | udp_mtu_try_proto = TCP|TLS|SCTP|UDP | ||
+ | |||
+ | |||
+ | ==== uri_host_extra_chars ==== | ||
+ | |||
+ | Specify additional chars that should be allowed in the host part of URI. | ||
+ | |||
+ | <code c> | ||
+ | uri_host_extra_chars = " | ||
</ | </ | ||
+ | ==== user ==== | ||
- | ==== $shtcv(htable=> | + | **Alias name: uid** |
- | Count items matching the value by regexp. | + | The user id to run Kamailio (Kamailio will suid to it). |
- | The “htname” must be a hash table name defined via “htable” parameter. | + | Example of usage: |
- | The **exp** must follow same rules as for **$shtcn(...)**. | + | <code c> |
+ | user=" | ||
+ | </ | ||
- | < | + | ==== user_agent_header ==== |
- | ... | + | |
- | modparam(" | + | Set the value of User-Agent header for requests generated by Kamailio. It must contain header name as well, but not the ending CRLF. |
- | ... | + | |
- | $sht(a=>abc) = " | + | <code c> |
- | $shtex(a=> | + | user_agent_header="User-Agent: My Super SIP Server" |
- | xlog(" | + | |
- | ... | + | |
</ | </ | ||
- | ==== $shtinc(htable=> | + | ==== verbose_startup |
- | Atomic increment of the value for the hash table item. | + | Control if printing routing tree and udp probing buffer debug messages should be printed at startup. |
- | < | + | Default is 0 (don't print); set to 1 to get those debug messages. |
- | ... | + | |
- | modparam(" | + | Example of usage: |
- | ... | + | |
- | $sht(a=>$au) = 1; | + | <code c> |
- | xlog(" | + | |
- | ... | + | |
</ | </ | ||
- | ==== $shtdec(htable=> | + | ==== version_table |
- | Atomic decrement | + | Set the name of the table holding |
- | < | + | Example of usage: |
- | ... | + | |
- | modparam(" | + | < |
- | ... | + | version_table="version44" |
- | $sht(a=> | + | |
- | xlog("==== $shtdec(a=> | + | |
- | ... | + | |
</ | </ | ||
- | ==== $shtitkey(iname) | + | ==== wait_worker1_mode |
- | The key at the current position in the iterator. | + | Enable waiting for child SIP worker one to complete initialization, |
- | ==== $shtitval(iname) ==== | + | Default: 0 (do not wait for child worker one to complete initialization). |
- | The value at the current position in the iterator. | + | Example: |
+ | |||
+ | <code c> | ||
+ | wait_worker1_mode = 1 | ||
+ | </ | ||
+ | |||
+ | ==== wait_worker1_time ==== | ||
+ | |||
+ | How long to wait for child worker one to complete | ||
+ | |||
+ | Default: 4000000 (micro-seconds = 4 seconds). | ||
Example: | Example: | ||
<code c> | <code c> | ||
- | sht_iterator_start(" | + | wait_worker1_time = 1000000 |
- | while(sht_iterator_next(" | + | |
- | xlog(" | + | |
- | } | + | |
- | sht_iterator_end(" | + | |
</ | </ | ||
- | ==== $shtrecord(id) | + | ==== wait_worker1_usleep |
- | Get the key or the value of expired item inside the event_route[htable: | + | How long to wait for child worker one to complete |
- | The id can be: | + | Default: 100000 (micro-seconds = 0.1 seconds). |
- | * key | + | Example: |
- | * value | + | |
+ | <code c> | ||
+ | wait_worker1_usleep = 50000 | ||
+ | </ | ||
+ | |||
+ | ==== workdir ==== | ||
+ | |||
+ | **Alias name: wdir** | ||
+ | |||
+ | The working directory used by Kamailio at runtime. You might find it useful when it comes to generating core files :) | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | | ||
+ | or | ||
+ | | ||
+ | |||
+ | ==== xavp_via_params ==== | ||
+ | |||
+ | Set the name of the XAVP of which subfields will be added as local //Via// -header parameters. | ||
+ | |||
+ | If not set, XAVP to Via header parameter manipulation is not applied (default behaviour). | ||
+ | |||
+ | If set, local Via header gets additional parameters from defined XAVP. Core flag FL_ADD_XAVP_VIA_PARAMS needs to be set¹. | ||
+ | |||
+ | Example: | ||
+ | | ||
+ | [1] See function // | ||
+ | |||
+ | ==== xavp_via_fields ==== | ||
+ | |||
+ | Set the name of xavp from where to take Via header field: address and port. | ||
+ | Use them to build local Via header. | ||
Example: | Example: | ||
<code c> | <code c> | ||
- | event_route[htable: | + | xavp_via_fields=" |
- | | + | |
+ | request_route | ||
+ | | ||
+ | | ||
+ | | ||
+ | via_use_xavp_fields(" | ||
+ | t_relay(); | ||
} | } | ||
</ | </ | ||
- | ===== Memcached | + | |
+ | See function // | ||
- | ==== $mct(key) | + | ===== DNS Parameters ===== |
- | Access hash table entries stored in the memcached server. | + | Note: See also file doc/dns.txt for details about Kamailio' |
- | <fc # | + | Kamailio has an internal DNS resolver with caching capabilities. If this caching resolver |
- | The “key” can be: | + | ^ DNS resolver comparison |
+ | | Caching of resolved records | yes | no* | | ||
+ | | NAPTR/SRV lookups with correct weighting | yes | yes | | ||
+ | | DNS based failover | yes | no | | ||
- | | + | * Of course you can use the resolving name servers configured in /etc/resolv.conf as caching nameservers. |
- | * dynamic string - set of characters that include pseudo-variables. The pseudo-variables will be evaluated at runtime. | + | |
- | When assigning values, | + | If the internal resolver/ |
+ | dns.add_srv, | ||
- | < | + | Note: During startup of Kamailio, before the internal resolver is loaded, the system resolver will be used (it will be used for queries done from module register functions or modparams fixups, but not for queries done from mod_init() or normal fixups). |
- | ... | + | |
- | $mct($au) = 1; | + | Note: The dns cache uses the DNS servers configured on your server (/ |
- | $mct($ru) = $fu; | + | |
- | $mct(test) = 1; | + | Kamailio also allows you to finetune the DNS resolver settings. |
- | xlog("stored value is $mct(test)"); | + | |
- | $mct(test) = null; # delete | + | The maximum time a dns request can take (before failing) is (if dns_try_ipv6 is yes, multiply it again by 2; if SRV and NAPTR lookups are enabled, it can take even longer!): |
- | xlog("stored | + | |
- | ... | + | (dns_retr_time*(dns_retr_no+1)*dns_servers_no)*(search_list_domains) |
+ | |||
+ | Note: During DNS lookups, the process which performs the DNS lookup blocks. To minimize the blocked time the following parameters can be used (max 2s): | ||
+ | |||
+ | dns_try_ipv6=no | ||
+ | dns_retr_time=1 | ||
+ | | ||
+ | dns_use_search_list=no | ||
+ | |||
+ | ==== dns ==== | ||
+ | |||
+ | This parameter controls if the SIP server will try doing a DNS lookup on the address in the Via header of a received sip request to decide if adding a received=< | ||
+ | DNS names (instead of IPs) should have received= added, so turning dns to yes is not recommended. | ||
+ | |||
+ | Default is no. | ||
+ | |||
+ | ==== rev_dns ==== | ||
+ | |||
+ | This parameter controls if the SIP server will try doing a reverse DNS lookup on the source IP of a sip request | ||
+ | to decide if adding a received=< | ||
+ | See also dns (the effect is cumulative, both can be turned on and in that case if the DNS lookup | ||
+ | DNS test will be tried). | ||
+ | Note that Vias containing DNS names (instead of IPs) should have received= added, so turning rev_dns to yes is not recommended. | ||
+ | |||
+ | |||
+ | Default is no. | ||
+ | |||
+ | ==== dns_cache_del_nonexp ==== | ||
+ | |||
+ | **Alias name: dns_cache_delete_nonexpired** | ||
+ | |||
+ | dns_cache_del_nonexp = yes | no (default: no) | ||
+ | allow deletion of non-expired records from the cache when there is no more space | ||
+ | left for new ones. The last-recently used entries are deleted first. | ||
+ | |||
+ | ==== dns_cache_rec_pref ==== | ||
+ | dns_cache_rec_pref = number (default 0) | ||
+ | dns cache record preference, determines how new DNS records are stored | ||
+ | Possible values: | ||
+ | 0 - do not check duplicates | ||
+ | 1 - prefer old records | ||
+ | 2 - prefer new records | ||
+ | 3 - prefer records with longer lifetime | ||
+ | |||
+ | ==== dns_cache_flags ==== | ||
+ | dns_cache_flags = number (default 0) - | ||
+ | dns cache specific resolver flags, used for overriding the default behaviour (low level). | ||
+ | Possible values: | ||
+ | 1 - ipv4 only: only DNS A requests are performed, even if Kamailio also listens on ipv6 addresses. | ||
+ | 2 - ipv6 only: only DNS AAAA requests are performed. Ignored if dns_try_ipv6 is off or Kamailio | ||
+ | doesn' | ||
+ | 4 - prefer ipv6: try first to resolve a host name to an ipv6 address (DNS AAAA request) and only | ||
+ | if this fails try an ipv4 address (DNS A request). By default the ipv4 addresses are preferred. | ||
+ | |||
+ | ==== dns_cache_gc_interval ==== | ||
+ | Interval in seconds after which the dns cache is garbage collected (default: 120 s) | ||
+ | |||
+ | dns_cache_gc_interval = number | ||
+ | |||
+ | |||
+ | ==== dns_cache_init ==== | ||
+ | |||
+ | If off, the dns cache is not initialized at startup and cannot be enabled runtime, that saves some memory. | ||
+ | |||
+ | dns_cache_init = on | off (default on) | ||
+ | |||
+ | ==== dns_cache_max_ttl ==== | ||
+ | dns_cache_max_ttl = time in seconds (default MAXINT) | ||
+ | |||
+ | ==== dns_cache_mem ==== | ||
+ | Maximum memory used for the dns cache in KB (default 500 K) | ||
+ | |||
+ | dns_cache_mem = number | ||
+ | |||
+ | |||
+ | ==== dns_cache_min_ttl ==== | ||
+ | dns_cache_min_ttl = time in seconds (default 0) | ||
+ | |||
+ | ==== dns_cache_negative_ttl ==== | ||
+ | |||
+ | Tells how long to keep negative DNS responses in cache. | ||
+ | |||
+ | ==== dns_naptr_ignore_rfc ==== | ||
+ | |||
+ | If the DNS lookup should ignore the remote side's protocol preferences, | ||
+ | |||
+ | dns_naptr_ignore_rfc = yes | no (default yes) | ||
+ | |||
+ | ==== dns_retr_no ==== | ||
+ | |||
+ | Number of dns retransmissions before giving up. Default | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | dns_retr_no=3 | ||
+ | |||
+ | ==== dns_retr_time ==== | ||
+ | |||
+ | Time in seconds before retrying a dns request. Default value is system specific, depends also on the '/ | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | dns_retr_time=3 | ||
+ | |||
+ | ==== dns_search_full_match ==== | ||
+ | When name was resolved using dns search list, check the domain added in the answer matches with one from the search list (small performance hit, but more safe) | ||
+ | |||
+ | dns_search_full_match | ||
+ | |||
+ | ==== dns_servers_no ==== | ||
+ | |||
+ | How many dns servers from the ones defined in '/ | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | dns_servers_no=2 | ||
+ | |||
+ | ==== dns_srv_lb ==== | ||
+ | |||
+ | **Alias name: dns_srv_loadbalancing** | ||
+ | |||
+ | Enable dns srv weight based load balancing (see doc/ | ||
+ | |||
+ | dns_srv_lb = yes | no (default no) | ||
+ | |||
+ | ==== dns_try_ipv6 ==== | ||
+ | |||
+ | Can be ' | ||
+ | for ipv6 (AAAA record). Default value is ' | ||
+ | |||
+ | Note: If dns_try_ipv6 is off, no hostname resolving that would result in an ipv6 address would succeed - it doesn' | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | dns_try_ipv6=yes | ||
+ | |||
+ | ==== dns_try_naptr ==== | ||
+ | Enable NAPTR support according to RFC 3263 (see doc/dns.txt for more info) | ||
+ | |||
+ | dns_try_naptr = yes | no (default no) | ||
+ | |||
+ | ==== dns_sctp_pref, | ||
+ | |||
+ | **Alias name: dns_sctp_preference, | ||
+ | |||
+ | Set preference for each protocol when doing naptr lookups. By default dns_udp_pref=30, | ||
+ | dns_tls_pref=10 and dns_sctp_pref=20. To use the remote site preferences set all dns_*_pref to the same positive value (e.g. dns_udp_pref=1, | ||
+ | dns_tcp_pref=1, | ||
+ | preference to -1 (or any other negative number). (see doc/dns.txt for more info) | ||
+ | |||
+ | dns_{udp, | ||
+ | |||
+ | ==== dns_use_search_list ==== | ||
+ | |||
+ | Can be ' | ||
+ | |||
+ | HINT: even if you don't have a search list defined, setting this option to ' | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | dns_use_search_list=no | ||
+ | |||
+ | ==== use_dns_cache ==== | ||
+ | |||
+ | Tells if DNS responses are cached - this means that the internal DNS resolver (instead of the system' | ||
+ | |||
+ | ==== use_dns_failover ==== | ||
+ | use_dns_failover = on | off (default off) | ||
+ | |||
+ | ===== TCP Parameters ===== | ||
+ | |||
+ | The following parameters allows to tweak the TCP behaviour. | ||
+ | |||
+ | ==== disable_tcp ==== | ||
+ | |||
+ | Global parameter to disable TCP support in the SIP server. Default | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | disable_tcp=yes | ||
+ | |||
+ | ==== tcp_accept_aliases ==== | ||
+ | |||
+ | If a message received over a tcp connection has " | ||
+ | |||
+ | Based on draft-ietf-sip-connect-reuse-00.txt, | ||
+ | |||
+ | See force_tcp_alias for more details. | ||
+ | |||
+ | Note: For NAT traversal of TCP clients it is better to not use tcp_accept_aliases but just use nathelper module and fix_nated_[contact|register] functions. | ||
+ | |||
+ | Default is "no" (off) | ||
+ | |||
+ | | ||
+ | |||
+ | ==== tcp_accept_haproxy ==== | ||
+ | |||
+ | Enable the internal TCP stack to expect a PROXY-protocol-formatted header as the first message of the connection. Both the human-readable (v1) and binary-encoded (v2) variants of the protocol are supported. This option is typically useful if you are behind a TCP load-balancer, | ||
+ | |||
+ | Please note that enabling this option | ||
+ | |||
+ | For reference: A PROXY protocol - https://www.haproxy.org/ | ||
+ | |||
+ | Default value is **no**. | ||
+ | |||
+ | <code c> | ||
+ | tcp_accept_haproxy=yes | ||
</ | </ | ||
- | ==== $mct(key=> | + | ==== tcp_accept_hep3 |
- | Using this alternative format, the default expiry may be overidden by including | + | Enable internal TCP receiving stack to accept HEP3 packets. This option has to be set to **yes** on a Kamailio instance acting as Homer SIPCapture server that is supposed to receive HEP3 packets over TCP/TLS. |
- | < | + | Default |
- | ... | + | |
- | $mct(test=> | + | <code c> |
- | xlog(" | + | tcp_accept_hep3=yes |
- | # sleep 30 seconds | + | |
- | xlog(" | + | |
- | ... | + | |
</ | </ | ||
- | ==== $mcinc(key) | + | ==== tcp_accept_no_cl |
- | Do a atomic increment operation on the value stored | + | Control whether to throw or not error when there is no Content-Length header for requests received over TCP. It is required to be set to **yes** for XCAP traffic sent over HTTP/1.1 which does not use Content-Length header, but splits large bodies |
- | <fc # | + | Default value is **no**. |
- | The “key” can be: | + | <code c> |
+ | tcp_accept_no_cl=yes | ||
+ | </ | ||
- | * static string - set of characters without pseudo-variables | + | ==== tcp_accept_unique ==== |
- | * dynamic string - set of characters that include pseudo-variables. The pseudo-variables will be evaluated at runtime. | + | |
- | < | + | If set to 1, reject duplicate connections coming from same source IP and port. |
- | ... | + | |
- | $mct(cnt) | + | Default set to 0. |
- | $mcinc(cnt) = 2; # increment by 2 | + | |
- | xlog(" | + | < |
- | ... | + | tcp_accept_unique |
</ | </ | ||
+ | ==== tcp_async ==== | ||
- | ==== $mcdec(key) ==== | + | **Alias name: tcp_buf_write** |
- | Do a atomic decrement operation on the value stored in memcached. You need to add a value previously. | + | If enabled, all the tcp writes that would block / wait for connect |
- | <fc #0000ff>It is R/W variable, you can assign values to it directly in configuration file.</fc> | + | **Note: |
- | The “key” can be: | + | tcp_async = yes | no (default yes) |
+ | | ||
- | * static string - set of characters without pseudo-variables | + | ==== tcp_children ==== |
- | * dynamic string - set of characters that include pseudo-variables. The pseudo-variables will be evaluated at runtime. | + | |
- | < | + | Number of children processes to be created for reading from TCP connections. If no value is explicitly set, the same number of TCP children as UDP children |
- | ... | + | |
- | $mct(cnt) = 10; | + | Example of usage: |
- | $mcdec(cnt) | + | |
- | xlog(" | + | tcp_children=4 |
- | ... | + | |
+ | ==== tcp_clone_rcvbuf ==== | ||
+ | |||
+ | Control if the received buffer should be cloned from the TCP stream, needed by functions working inside the SIP message buffer | ||
+ | |||
+ | Default is 0 (don't clone), set it to 1 for cloning. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | tcp_clone_rcvbuf=1 | ||
+ | ==== tcp_connection_lifetime ==== | ||
+ | |||
+ | Lifetime in seconds for TCP sessions. TCP sessions which are inactive for longer than **tcp_connection_lifetime** will be closed by Kamailio. Default value is defined is 120. Setting this value to 0 will close the TCP connection pretty quick ;-). | ||
+ | |||
+ | Note: As many SIP clients are behind NAT/ | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | tcp_connection_lifetime=3605 | ||
+ | |||
+ | ==== tcp_connection_match ==== | ||
+ | |||
+ | If set to 1, try to be more strict in matching outbound TCP connections, | ||
+ | |||
+ | Default is 0. | ||
+ | |||
+ | <code c> | ||
+ | tcp_connection_match=1 | ||
</ | </ | ||
+ | ==== tcp_connect_timeout ==== | ||
- | ===== XMLOPS Pseudo-Variables ===== | + | Time in seconds before an ongoing attempt to establish a new TCP connection will be aborted. Lower this value for faster detection of TCP connection problems. The default value is 10s. |
- | ==== $xml(name=> | + | Example of usage: |
- | * name - id to refer the documet | + | tcp_connect_timeout=5 |
- | * spec - specifier: | + | |
- | * doc - set/get the document as text | + | |
- | * xpath: | + | |
- | Example: | + | ==== tcp_conn_wq_max ==== |
- | < | + | Maximum bytes queued for write allowed per connection. Attempting to queue more bytes would result in an error and in the connection being closed (too slow). If tcp_buf_write is not enabled, it has no effect. |
- | $xml(x=>doc) = '<? | + | |
- | xlog(" | + | tcp_conn_wq_max = bytes (default 32 K) |
- | $xml(x=>xpath:/a/b) = "1234"; | + | |
+ | ==== tcp_crlf_ping ==== | ||
+ | Enable SIP outbound TCP keep-alive using PING-PONG (CRLFCRLF - CRLF). | ||
+ | |||
+ | tcp_crlf_ping | ||
+ | |||
+ | |||
+ | ==== tcp_defer_accept ==== | ||
+ | |||
+ | Tcp accepts will be delayed until some data is received (improves performance on proxies with lots of opened tcp connections). See linux tcp(7) TCP_DEFER_ACCEPT or freebsd ACCF_DATA(0). For now linux and freebsd only. | ||
+ | |||
+ | WARNING: the linux TCP_DEFER_ACCEPT is buggy (<=2.6.23) and doesn't work exactly as expected | ||
+ | |||
+ | On FreeBSD: | ||
+ | tcp_defer_accept = yes | no (default no) | ||
+ | |||
+ | On Linux: | ||
+ | tcp_defer_accept = number of seconds before timeout (default disabled) | ||
+ | |||
+ | ==== tcp_delayed_ack ==== | ||
+ | Initial ACK for opened connections will be delayed and sent with the first data segment (see linux tcp(7) TCP_QUICKACK). For now linux only. | ||
+ | |||
+ | tcp_delayed_ack | ||
+ | |||
+ | ==== tcp_fd_cache ==== | ||
+ | |||
+ | If enabled FDs used for sending will be cached inside the process calling tcp_send (performance increase for sending over tcp at the cost of slightly slower connection closing and extra FDs kept open) | ||
+ | |||
+ | tcp_fd_cache = yes | no (default yes) | ||
+ | |||
+ | ==== tcp_keepalive ==== | ||
+ | Enables keepalive for tcp (sets SO_KEEPALIVE socket option) | ||
+ | |||
+ | tcp_keepalive = yes | no (default yes) | ||
+ | |||
+ | ==== tcp_keepcnt ==== | ||
+ | Number of keepalives sent before dropping the connection (TCP_KEEPCNT socket option). Linux only. | ||
+ | |||
+ | tcp_keepcnt = number (not set by default) | ||
+ | |||
+ | ==== tcp_keepidle ==== | ||
+ | |||
+ | Time before starting to send keepalives, if the connection is idle (TCP_KEEPIDLE socket option). Linux only. | ||
+ | |||
+ | tcp_keepidle | ||
+ | |||
+ | ==== tcp_keepintvl ==== | ||
+ | Time interval between keepalive probes, when the previous probe failed (TCP_KEEPINTVL socket option). Linux only. | ||
+ | |||
+ | tcp_keepintvl = seconds (not set by default) | ||
+ | |||
+ | ==== tcp_linger2 ==== | ||
+ | Lifetime of orphaned sockets in FIN_WAIT2 state (overrides tcp_fin_timeout on, see linux tcp(7) TCP_LINGER2). Linux only. | ||
+ | |||
+ | tcp_linger2 = seconds (not set by default) | ||
+ | |||
+ | ==== tcp_max_connections ==== | ||
+ | |||
+ | Maximum number of tcp connections (if the number is exceeded no new tcp connections will be accepted). Default is defined in tcp_init.h: #define DEFAULT_TCP_MAX_CONNECTIONS 2048 | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | tcp_max_connections=4096 | ||
+ | |||
+ | ==== tcp_no_connect ==== | ||
+ | |||
+ | Stop outgoing TCP connects (also stops TLS) by setting tcp_no_connect to yes. | ||
+ | |||
+ | You can do this any time, even even if Kamailio is already started (in this case using the command " | ||
+ | |||
+ | ==== tcp_poll_method ==== | ||
+ | |||
+ | Poll method used (by default the best one for the current OS is selected). For available types see io_wait.c and poll_types.h: | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | tcp_poll_method=select | ||
+ | |||
+ | ==== tcp_rd_buf_size ==== | ||
+ | |||
+ | Buffer size used for tcp reads. A high buffer size increases performance on server with few connections and lot of traffic on them, but also increases memory consumption (so for lots of connection is better to use a low value). Note also that this value limits the maximum message size (SIP, HTTP) that can be received over tcp. | ||
+ | |||
+ | The value is internally limited to 16MByte, for higher values recompile Kamailio with higher limit in tcp_options.c (search for "rd_buf_size" | ||
+ | |||
+ | Default: 4096, can be changed at runtime. | ||
+ | |||
+ | <code c> | ||
+ | tcp_rd_buf_size=65536 | ||
</ | </ | ||
+ | ==== tcp_send_timeout ==== | ||
- | ===== TMX module Pseudo-Variables ===== | + | Time in seconds after a TCP connection will be closed if it is not available for writing in this interval (and Kamailio wants to send something on it). Lower this value for faster detection of broken TCP connections. The default value is 10s. |
- | ==== $T_branch_idx ==== | + | Example of usage: |
- | * the index (starting with 1 for the first branch) of the branch for which is executed the branch_route[]. If used outside of branch_route[] block, the value is ' | + | tcp_send_timeout=3 |
- | ==== $T_reply_ruid | + | ==== tcp_source_ipv4, |
- | * the ruid stored in the current branch of the transaction. The ruid is stored in a branch from the details in a contact binding. In a event_route[tm: | + | Set the source IP for all outbound TCP connections. If setting |
+ | tcp_source_ipv4 = IPv4 address | ||
+ | tcp_source_ipv6 = IPv6 address | ||
- | ==== $T_reply_code | + | ==== tcp_syncnt |
+ | Number of SYN retransmissions before aborting a connect attempt (see linux tcp(7) TCP_SYNCNT). Linux only. | ||
- | | + | |
- | ==== $T_req(pv) | + | ==== tcp_wq_blk_size |
+ | Block size used for tcp async writes. It should be big enough to hold a few datagrams. If it's smaller then a datagram (in fact a tcp write()) size, it will be rounded up. It has no influenced on the number of datagrams queued (for that see tcp_conn_wq_max or tcp_wq_max). It has mostly debugging and testing value (can be ignored). | ||
- | * can be used in reply routes | + | Default: 2100 (~ 2 INVITEs), can be changed at runtime. |
+ | |||
+ | ==== tcp_wq_max ==== | ||
+ | |||
+ | Maximum bytes queued for write allowed globally. It has no effect if tcp_buf_write is not enabled. | ||
+ | |||
+ | tcp_wq_max = bytes (default 10 Mb) | ||
+ | |||
+ | ==== tcp_reuse_port ==== | ||
+ | |||
+ | Allows reuse of TCP ports. This means,for example, that the same TCP ports on which Kamailio is listening on, can be used as source ports of new TCP connections when acting as an UAC. Kamailio must have been compiled | ||
+ | |||
+ | tcp_reuse_port = yes (default no) | ||
+ | |||
+ | ===== TLS Parameters ===== | ||
+ | |||
+ | Most of TLS layer attributes can be configured via TLS module parameters. | ||
+ | |||
+ | ==== tls_port_no ==== | ||
+ | |||
+ | The port the SIP server listens to for TLS connections. | ||
+ | |||
+ | Default value is 5061. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | tls_port_no=6061 | ||
+ | |||
+ | ==== tls_max_connections ==== | ||
+ | |||
+ | Maximum number of ls connections (if the number is exceeded no new ls connections will be accepted). It cannot exceed tcp_max_connections. | ||
+ | |||
+ | Default value is 2048. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | tls_max_connections=4096 | ||
+ | ===== SCTP Parameters ===== | ||
+ | |||
+ | ==== disable_sctp ==== | ||
+ | |||
+ | Global parameter to disable SCTP support in the SIP server. see enable_sctp | ||
+ | |||
+ | Default value is ' | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | disable_sctp=yes | ||
+ | |||
+ | ==== enable_sctp ==== | ||
+ | |||
+ | enable_sctp = 0/1/2 - SCTP disabled (0)/ SCTP enabled (1)/auto (2), | ||
+ | | ||
+ | |||
+ | ==== sctp_children ==== | ||
+ | sctp children no (similar to udp children) | ||
+ | sctp_children = number | ||
+ | |||
+ | ==== sctp_socket_rcvbuf ==== | ||
+ | Size for the sctp socket receive buffer | ||
+ | |||
+ | **Alias name: sctp_socket_receive_buffer** | ||
+ | |||
+ | sctp_socket_rcvbuf = number | ||
+ | |||
+ | ==== sctp_socket_sndbuf ==== | ||
+ | Size for the sctp socket send buffer | ||
+ | |||
+ | **Alias name: sctp_socket_send_buffer** | ||
+ | |||
+ | sctp_socket_sndbuf = number | ||
+ | |||
+ | ==== sctp_autoclose ==== | ||
+ | Number of seconds before autoclosing an idle association (default: 180 s). Can be changed at runtime, but it will affect only new associations. E.g.: | ||
+ | $ kamcmd cfg.set_now_int sctp autoclose 120 | ||
+ | |||
+ | sctp_autoclose = seconds | ||
+ | |||
+ | ==== sctp_send_ttl ==== | ||
+ | Number of milliseconds before an unsent message/ | ||
+ | $ kamcmd cfg.set_now_int sctp send_ttl 180000 | ||
+ | |||
+ | sctp_send_ttl = milliseconds - n | ||
+ | |||
+ | ==== sctp_send_retries ==== | ||
+ | How many times to attempt re-sending a message on a re-opened association, | ||
+ | |||
+ | WARNING: use with care and low values (e.g. 1-3) to avoid " | ||
+ | |||
+ | sctp_send_retries = 1 | ||
+ | |||
+ | ==== sctp_assoc_tracking ==== | ||
+ | Controls whether | ||
+ | |||
+ | Can be changed at runtime (" | ||
+ | |||
+ | Note: turning sctp_assoc_tracking on/off will delete all the tracking information for all the currently tracked associations and might introduce a small temporary delay in the sctp processing if lots of associations were tracked. | ||
+ | |||
+ | Config options depending on sctp_assoc_tracking being on: sctp_assoc_reuse. | ||
+ | |||
+ | sctp_assoc_tracking = yes/no | ||
+ | |||
+ | ==== sctp_assoc_reuse ==== | ||
+ | Controls sctp association reuse. For now only association reuse for replies is affected by it. Default: yes. | ||
+ | Depends on sctp_assoc_tracking being on. | ||
+ | |||
+ | Note that even if turned off, if the port in via corresponds | ||
+ | Can be changed at runtime (sctp assoc_reuse), | ||
+ | |||
+ | sctp_assoc_reuse = yes/no | ||
+ | |||
+ | ==== sctp_max_assocs ==== | ||
+ | Maximum number of allowed open sctp associations. -1 means maximum allowed by the OS. Default: -1. | ||
+ | Can be changed at runtime (e.g.: | ||
+ | |||
+ | When Kamailio tries to open a new association and the max_assocs is exceeded the exact behaviour depends on whether or not | ||
+ | sctp_assoc_tracking is on. If on, the send triggering the active open will gracefully fail, before actually opening the new association and no packet will be sent. However if sctp_assoc_tracking is off, the association will first be opened and then immediately closed. In general this means that the initial sip packet will be sent (as part of the 4-way handshake). | ||
+ | |||
+ | |||
+ | |||
+ | sctp_max_assocs = number | ||
+ | |||
+ | ==== sctp_srto_initial ==== | ||
+ | Initial value of the retr. timeout, used in RTO calculations (default: OS specific). | ||
+ | |||
+ | Can be changed at runtime (sctp srto_initial) but it will affect only new associations. | ||
+ | |||
+ | sctp_srto_initial = milliseconds | ||
+ | |||
+ | ==== sctp_srto_max ==== | ||
+ | Maximum value of the retransmission timeout (RTO) (default: OS specific). | ||
+ | |||
+ | WARNING: values lower then the sctp sack_delay will cause lots of retransmissions and connection instability (see sctp_srto_min for more details). | ||
+ | |||
+ | Can be changed at runtime (sctp srto_max) but it will affect only new associations. | ||
+ | |||
+ | sctp_srto_max = milliseconds | ||
+ | |||
+ | ==== sctp_srto_min ==== | ||
+ | Minimum value of the retransmission timeout (RTO) (default: OS specific). | ||
+ | |||
+ | WARNING: values lower then the sctp sack_delay of any peer might cause retransmissions and possible interoperability problems. According | ||
+ | |||
+ | Can be changed at runtime (sctp srto_min) but it will affect only new associations. | ||
+ | |||
+ | sctp_srto_min = milliseconds | ||
+ | |||
+ | ==== sctp_asocmaxrxt ==== | ||
+ | Maximum retransmissions attempts per association (default: OS specific). It should be set to sctp_pathmaxrxt * no. of expected paths. | ||
+ | |||
+ | Can be changed at runtime (sctp asocmaxrxt) but it will affect only new associations. | ||
+ | |||
+ | sctp_asocmaxrxt | ||
+ | |||
+ | ==== sctp_init_max_attempts ==== | ||
+ | Maximum INIT retransmission attempts (default: OS specific). | ||
+ | |||
+ | Can be changed at runtime (sctp init_max_attempts). | ||
+ | |||
+ | sctp_init_max_attempts = number | ||
+ | |||
+ | ==== sctp_init_max_timeo ==== | ||
+ | Maximum INIT retransmission timeout (RTO max for INIT). Default: OS specific. | ||
+ | |||
+ | Can be changed at runtime (sctp init_max_timeo). | ||
+ | |||
+ | sctp_init_max_timeo = milliseconds | ||
+ | |||
+ | |||
+ | ==== sctp_hbinterval ==== | ||
+ | sctp heartbeat interval. Setting it to -1 will disable the heartbeats. Default: OS specific. | ||
+ | |||
+ | Can be changed at runtime (sctp hbinterval) but it will affect only new associations. | ||
+ | |||
+ | sctp_hbinterval = milliseconds | ||
+ | |||
+ | ==== sctp_pathmaxrxt ==== | ||
+ | Maximum retransmission attempts per path (see also sctp_asocmaxrxt). Default: OS specific. | ||
+ | |||
+ | Can be changed at runtime (sctp pathmaxrxt) but it will affect only new associations. | ||
+ | |||
+ | sctp_pathmaxrxt = number | ||
+ | |||
+ | ==== sctp_sack_delay ==== | ||
+ | Delay until an ACK is generated after receiving a packet. Default: OS specific. | ||
+ | |||
+ | WARNING: a value higher then srto_min can cause a lot of retransmissions (and strange problems). A value higher then srto_max will result in very high connections instability. According to the standard the sack_delay value should be between 200 and 500 ms. | ||
+ | |||
+ | Can be changed at runtime (sctp sack_delay) but it will affect only new associations. | ||
+ | |||
+ | sctp_sack_delay = milliseconds | ||
+ | |||
+ | ==== sctp_sack_freq ==== | ||
+ | Number of packets received before an ACK is sent (without waiting for the sack_delay to expire). | ||
+ | |||
+ | Note: on linux with lksctp up to and including 1.0.9 is not possible to set this value (having it in the config will produce a warning on startup). | ||
+ | |||
+ | Can be changed at runtime (sctp sack_freq) but it will affect only new associations. | ||
+ | |||
+ | sctp_sack_freq = number | ||
+ | |||
+ | ==== sctp_max_burst ==== | ||
+ | Maximum burst of packets that can be emitted by an association. Default: OS specific. | ||
+ | |||
+ | Can be changed at runtime (sctp max_burst) but it will affect only new associations. | ||
+ | |||
+ | sctp_max_burst = number | ||
+ | |||
+ | |||
+ | ===== UDP Parameters ===== | ||
+ | |||
+ | ==== udp4_raw ==== | ||
+ | |||
+ | Enables raw socket support for sending UDP IPv4 datagrams (40-50% performance increase on linux multi-cpu). | ||
+ | |||
+ | Possible values: 0 - disabled (default), 1 - enabled, -1 auto. | ||
+ | |||
+ | In " | ||
+ | |||
+ | The parameter can be set at runtime as long as sr was started with enough privileges (core.udp4_raw). | ||
< | < | ||
- | route { | + | udp4_raw = on |
- | | + | </ |
- | t_relay(); | + | |
- | } | + | |
- | onreply_route[1] { | + | ==== udp4_raw_mtu ==== |
- | | + | |
- | } | + | MTU value used for UDP IPv4 packets when udp4_raw is enabled. |
+ | |||
+ | The parameter can be set at runtime (core.udp4_raw_mtu). | ||
+ | |||
+ | ==== udp4_raw_ttl ==== | ||
+ | |||
+ | TTL value used for UDP IPv4 packets when udp4_raw is enabled. By default it is set to auto mode (-1), meaning that the same TTL will be used as for normal UDP sockets. | ||
+ | |||
+ | The parameter can be set at runtime (core.udp4_raw_ttl). | ||
+ | |||
+ | |||
+ | ===== Blocklist Parameters ===== | ||
+ | |||
+ | ==== dst_blocklist_expire ==== | ||
+ | |||
+ | **Alias name: dst_blocklist_ttl** | ||
+ | |||
+ | How much time a blocklisted destination will be kept in the blocklist (w/o any update). | ||
+ | |||
+ | | ||
+ | |||
+ | ==== dst_blocklist_gc_interval ==== | ||
+ | How often the garbage collection will run (eliminating old, expired entries). | ||
+ | |||
+ | dst_blocklist_gc_interval = time in s (default 60 s) | ||
+ | |||
+ | ==== dst_blocklist_init ==== | ||
+ | If off, the blocklist is not initialized at startup and cannot be enabled runtime, that saves some memory. | ||
+ | |||
+ | dst_blocklist_init = on | off (default on) | ||
+ | |||
+ | ==== dst_blocklist_mem ==== | ||
+ | Maximum shared memory amount used for keeping the blocklisted destinations. | ||
+ | |||
+ | dst_blocklist_mem = size in Kb (default 250 Kb) | ||
+ | |||
+ | ==== use_dst_blocklist ==== | ||
+ | Enable the destination blocklist: Each failed send attempt will cause the destination to be added to the blocklist. Before any send, this blocklist will be checked and if a match is found, the send is no longer attempted (an error is returned immediately). | ||
+ | |||
+ | Note: using the blocklist incurs a small performance penalty. | ||
+ | |||
+ | See also doc/ | ||
+ | |||
+ | use_dst_blocklist = on | off (default off) | ||
+ | |||
+ | ===== Real-Time Parameters ===== | ||
+ | ==== real_time ==== | ||
+ | |||
+ | Sets real time priority for all the Kamailio processes, or the timers (bitmask). | ||
+ | | ||
+ | 1 - the "fast" timer | ||
+ | 2 - the " | ||
+ | 4 - all processes, except the timers | ||
+ | | ||
+ | |||
+ | real_time = < | ||
+ | |||
+ | ==== rt_policy ==== | ||
+ | Real time scheduling policy, 0 = SCHED_OTHER, | ||
+ | |||
+ | rt_policy= < | ||
+ | |||
+ | ==== rt_prio ==== | ||
+ | Real time priority used for everything except the timers, if real_time is enabled. | ||
+ | |||
+ | rt_prio = <int> (default 0) | ||
+ | |||
+ | ==== rt_timer1_policy ==== | ||
+ | |||
+ | **Alias name: rt_ftimer_policy** | ||
+ | |||
+ | Like rt_policy but for the " | ||
+ | |||
+ | rt_timer1_policy=< | ||
+ | |||
+ | ==== rt_timer1_prio ==== | ||
+ | |||
+ | **Alias name: rt_fast_timer_prio, | ||
+ | |||
+ | Like rt_prio but for the "fast" timer process (if real_time & 1). | ||
+ | |||
+ | rt_timer1_prio=< | ||
+ | |||
+ | ==== rt_timer2_policy ==== | ||
+ | |||
+ | **Alias name: rt_stimer_policy** | ||
+ | |||
+ | Like rt_policy but for the " | ||
+ | |||
+ | rt_timer2_policy=< | ||
+ | |||
+ | ==== rt_timer2_prio ==== | ||
+ | |||
+ | **Alias name: rt_stimer_prio** | ||
+ | |||
+ | Like rt_prio but for the " | ||
+ | |||
+ | rt_timer2_prio=< | ||
+ | ===== Core Functions ===== | ||
+ | |||
+ | Functions exported by core that can be used in route blocks. | ||
+ | |||
+ | ==== add_local_rport ==== | ||
+ | |||
+ | Add **rport** parameter to local generated Via header -- see RFC3581. In effect for forwarded SIP requests. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | <code c> | ||
+ | add_local_rport(); | ||
</ | </ | ||
- | ==== $T_rpl(pv) | + | ==== avpflags ==== |
+ | ==== break ==== | ||
- | * can be used in failure routes | + | ' |
- | < | + | |
- | route { | + | |
- | t_on_failure(" | + | |
- | t_relay(); | + | |
- | } | + | |
- | failure_route[1] { | + | ==== drop ==== |
- | xlog("Reply SRCIP: | + | |
- | } | + | Stop the execution of the configuration script and alter the implicit action which is done afterwards. |
+ | |||
+ | If the function is called in a ' | ||
+ | |||
+ | If the function is called in the default ' | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | onreply_route { | ||
+ | if(status==" | ||
+ | drop(); # this works | ||
+ | } | ||
+ | } | ||
+ | |||
+ | onreply_route[FOOBAR] { | ||
+ | if(status=="200") { | ||
+ | drop(); # this is ignored | ||
+ | } | ||
+ | } | ||
+ | |||
+ | ==== exit ==== | ||
+ | |||
+ | Stop the execution of the configuration script -- it has the same behaviour as return(0). It does not affect the implicit action to be taken after script execution. | ||
+ | |||
+ | route { | ||
+ | if (route(2)) { | ||
+ | xlog(" | ||
+ | } else { | ||
+ | xlog(" | ||
+ | }; | ||
+ | } | ||
+ | |||
+ | route[2] { | ||
+ | if (is_method(" | ||
+ | return(1); | ||
+ | } else if (is_method(" | ||
+ | return(-1); | ||
+ | } else if (is_method(" | ||
+ | sl_send_reply(" | ||
+ | exit; | ||
+ | }; | ||
+ | } | ||
+ | |||
+ | ==== error ==== | ||
+ | |||
+ | ==== exec ==== | ||
+ | |||
+ | ==== force_rport ==== | ||
+ | |||
+ | Force_rport() adds the rport parameter to the first Via header of the received message. Thus, Kamailio will add the received | ||
+ | |||
+ | This is useful for NAT traversal, to enforce symmetric response signaling. | ||
+ | |||
+ | The rport parameter is defined in RFC 3581. | ||
+ | |||
+ | Note: there is also a force_rport parameter which changes the gobal behavior of the SIP proxy. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | force_rport(); | ||
+ | |||
+ | ==== add_rport ==== | ||
+ | Alias for force_rport(); | ||
+ | |||
+ | ==== force_send_socket ==== | ||
+ | |||
+ | |||
+ | Force to send the message from the specified socket (it _must_ be one of the sockets specified with the " | ||
+ | |||
+ | This function does not support pseudo-variables, | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | < | ||
+ | force_send_socket(10.10.10.10: | ||
+ | force_send_socket(udp: | ||
</ | </ | ||
+ | ==== force_tcp_alias ==== | ||
+ | |||
+ | **Alias name: add_tcp_alias** | ||
+ | |||
+ | force_tcp_alias(port) | ||
+ | |||
+ | adds a tcp port alias for the current connection (if tcp). | ||
+ | Useful if you want to send all the trafic to port_alias through | ||
+ | the same connection this request came from [it could help | ||
+ | for firewall or nat traversal]. | ||
+ | With no parameters adds the port from the message via as the alias. | ||
+ | When the " | ||
+ | much time), all the port aliases are removed. | ||
+ | |||
+ | ==== forward ==== | ||
+ | |||
+ | Forward the SIP request to destination stored in $du in stateless mode. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | $du = " | ||
+ | forward(); | ||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | |||
+ | ==== isavpflagset ==== | ||
+ | |||
+ | ==== isflagset ==== | ||
+ | |||
+ | Test if a flag is set for current processed message (if the flag value is 1). The value of the parameter can be in range of 0..31. | ||
+ | |||
+ | For more see: https:// | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | if(isflagset(3)) { | ||
+ | log(" | ||
+ | }; | ||
+ | |||
+ | |||
+ | Kamailio also supports named flags. They have to be declared at the beginning of the config file with: | ||
+ | |||
+ | | ||
+ | |||
+ | Example: | ||
+ | flags test, a:1, b:2 ; | ||
+ | | ||
+ | setflag(test); | ||
+ | if (isflagset(a)){ # equiv. to isflagset(1) | ||
+ | .... | ||
+ | } | ||
+ | resetflag(b); | ||
+ | |||
+ | ==== is_int ==== | ||
+ | Checks if a pseudo variable argument contains integer value. | ||
+ | |||
+ | if(is_int(" | ||
+ | log(" | ||
+ | } | ||
+ | |||
+ | ==== log ==== | ||
+ | |||
+ | Write text message to standard error terminal or syslog. You can specify the log level as first parameter. | ||
+ | |||
+ | For more see: http:// | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | log(" | ||
+ | |||
+ | |||
+ | ==== prefix ==== | ||
+ | |||
+ | Add the string parameter in front of username in R-URI. | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | prefix(" | ||
+ | |||
+ | ==== resetavpflag ==== | ||
+ | |||
+ | ==== resetflag ==== | ||
+ | |||
+ | ==== return ==== | ||
+ | |||
+ | The return() function allows you to return any integer value from a called route() block. | ||
+ | You can test the value returned by a route using [[devel# | ||
+ | |||
+ | return(0) is same as [[devel# | ||
+ | |||
+ | In bool expressions: | ||
+ | |||
+ | * Negative is FALSE | ||
+ | * Positive is TRUE | ||
- | ==== $T_inv(pv) ==== | + | If no value is specified, or a route reaches its end without executing a return statement, it returns 1. If return is used in the top level route is equivalent with exit [val]. |
- | * can be used in request routes or inside the modules to get access to attributes of the INVITE request while processing a CANCEL. | + | Example usage: |
< | < | ||
route { | route { | ||
- | if(is_method("CANCEL")) | + | if (route(2)) { |
- | { | + | xlog("L_NOTICE"," |
- | | + | } else { |
- | | + | xlog(" |
- | # first flag is set in the INVITE transaction | + | |
- | | + | } |
- | } | + | </ |
+ | < | ||
+ | route[2] | ||
+ | if (is_method(" | ||
+ | return(1); | ||
+ | } else if (is_method(" | ||
+ | | ||
+ | } else { | ||
+ | return(0); | ||
+ | }; | ||
} | } | ||
</ | </ | ||
- | ==== $T(name) ==== | + | See also the FAQ for how the function return code is evaluated: |
- | * pseudo-variable class to access TM attributes | + | * https:// |
+ | ==== revert_uri ==== | ||
- | The **name** can be: | + | Set the R-URI to the value of the R-URI as it was when the request was received by server (undo all changes of R-URI). |
- | * id_index - return the internal index of current transaction or $null if not transaction is found | + | Example |
- | * id_label - return the internal label of current transaction or $null if not transaction is found | + | |
- | * id_index_n - return the internal index of current transaction, | + | |
- | * id_label_n - return the internal label of current transaction, | + | |
- | * reply_code - reply code (alias to $T_reply_code) | + | |
- | * reply_reason - reply reason | + | |
- | * reply_last - last received reply code | + | |
- | * branch_index - branch index (alias to $T_branch_idx) | + | |
- | * ruid - return the internal location ruid field for current branch | + | |
- | * reply_type - 1 if it is a local generated reply, 0 - if no reply for transaction or it is a received reply | + | |
- | Note: the pair (id_index, | + | revert_uri(); |
- | ==== $T_branch(name) | + | ==== rewritehostport |
- | | + | **Alias name: sethostport, |
- | The **name** can be: | + | Rewrite the domain part and port of the R-URI with the value of function' |
- | * flags - Flags of the branch. In a event_route[tm:branch-failure] block, this is the flags of the branch that sent a failure reply. In a failure_route[] block, this is the flags of the winning failure response. | + | Example |
- | * uri - the R-URI of the branch. Can be used in onreply_route[id] - reply route blocks executed by tm module. For other routing blocks handling requests, the R-URI is returned by $ru | + | |
+ | rewritehostport(" | ||
- | ===== UAC module Pseudo-Variables ===== | + | ==== rewritehostporttrans |
- | ==== $uac_req(key) ==== | + | **Alias name: sethostporttrans, |
- | * used to build the input for uac_send_req() | + | Rewrite |
- | The key can be: | + | Example |
- | * method - SIP method | + | |
- | * ruri - request URI | + | |
- | * furi - From URI | + | |
- | * turi - To URI | + | |
- | * ouri - Outbound proxy URI | + | |
- | * hdrs - SIP Headers | + | |
- | * body - Body | + | |
- | * auser - authentication username | + | |
- | * apasswd - authentication password | + | |
- | * sock - local socket to be used for sending (proto: | + | |
- | * callid - SIP-Call-ID | + | |
- | * all - alias useful to reset all fields - $uac_req(all) = $null; | + | |
- | * evroute - it has to be set to 1 in order to execute event_route[uac:reply] when reply is received | + | |
- | * evcode - reply code for the request sent with uac_req_send(), | + | |
- | * evtype - is 1 if the reply was received via network, 2 if the reply was locally generated (e.g., retransmission timeout), available inside event_route[uac: | + | |
- | * evparam - generic data buffer associated with the request that can be set before sending it and retrieved when executing the event route. It has a size of 128 characters. | + | |
- | <code c> | + | rewritehostporttrans("1.2.3.4:5080"); |
- | $uac_req(method)="OPTIONS"; | + | |
- | $uac_req(ruri)=" | + | |
- | $uac_req(furi)=" | + | |
- | $uac_req(turi)=" | + | |
- | $uac_req(evroute) = 1; | + | |
- | uac_req_send(); | + | |
- | ... | + | |
- | event_route[uac:reply] { | + | |
- | xlog(" | + | |
- | } | + | |
- | </ | + | |
- | ===== Nathelper module Pseudo-Variables ===== | + | |
- | ==== $rr_count | + | ==== rewritehost |
- | | + | **Alias name: sethost, seth** |
- | ==== $rr_top_count ==== | + | Rewrite the domain part of the R-URI with the value of function' |
- | * If topmost Record Route in received SIP request or reply is a double Record Route, value of $rr_top_count is 2. If it a single Record Route, value of $rr_top_count is 1. If there is no Record Route(s), value of $rr_top_count is 0. | + | Example |
- | ===== MQueue module Pseudo-Variables ===== | + | rewritehost(" |
- | ==== $mqk(q) | + | ==== rewriteport |
- | | + | **Alias name: setport, setp** |
- | ==== $mqv(q) ==== | + | Rewrites/ |
+ | Example of usage: | ||
- | * return the value of fetched item from queue q | + | rewriteport(" |
- | <code c> | + | ==== rewriteuri ==== |
- | ... | + | |
- | mq_add(" | + | |
- | ... | + | |
- | while(mq_fetch(" | + | |
- | { | + | |
- | | + | |
- | } | + | |
- | ... | + | |
- | </ | + | |
- | ===== TimeVal ===== | + | **Alias name: seturi** |
- | ==== $TV(name) ==== | + | Rewrite the request URI. |
- | Seconds and microseconds taken from struct timeval. | + | Example of usage: |
- | * $TV(s) - seconds (cached at first call per sip message) | + | rewriteuri("sip: |
- | * $TV(u) - microseconds (cached at first call per sip message) | + | |
- | * $TV(sn) - seconds (not cached) | + | |
- | * $TV(un) - microseconds (not cached) | + | |
- | * $TV(Sn) - string representation seconds.microseconds (not cached) | + | |
- | ===== Next hop address ===== | + | ==== rewriteuserpass |
- | ==== $nh(key) ==== | + | **Alias name: setuserpass, |
- | Return attributes | + | Rewrite the password part of the R-URI with the value of function' |
- | * $nh(u) - uri (lower case u) | + | Example of usage: |
- | * $nh(U) - username (upper case u) | + | |
- | * $nh(d) - domain | + | |
- | * $nh(p) - port (lower case p) | + | |
- | * $nh(P) - transport protocol (upper case p) | + | |
- | ===== GeoIP module Pseudo-Variables ===== | + | rewriteuserpass(" |
+ | ==== rewriteuser | ||
- | ==== $gip(pvc=> | + | **Alias name: setuser, setu** |
- | Variables exported by GeoIP module, returning geo-location attributes. The attributes are populated upon calling | + | Rewrite the user part of the R-URI with the value of function's parameter. |
- | **pvc** (container id) is second parameter | + | Example |
- | * cc - country code | + | rewriteuser(" |
- | * tz - time zone | + | |
- | * zip - postal code | + | |
- | * lat - latitude | + | |
- | * lon - longitude | + | |
- | * dma - dma code | + | |
- | * ips - ip start | + | |
- | * ipe - ip end | + | |
- | * city - city | + | |
- | * area - area code | + | |
- | * regc - region | + | |
- | * regn - region name | + | |
- | * metro - metro code | + | |
- | * contc - continent code | + | |
- | You can call several time **geoip_match(ipaddr, | + | ==== route ==== |
+ | |||
+ | Execute route block given in parameter. | ||
+ | |||
+ | Examples | ||
+ | |||
+ | route(REGISTER_REQUEST); | ||
+ | route(@received.proto + " | ||
+ | |||
+ | |||
+ | ==== selval ==== | ||
+ | |||
+ | Select | ||
+ | |||
+ | Prototype: | ||
<code c> | <code c> | ||
- | geoip_match(" | + | selval(evalexpr, valexp1, valexpr2) |
- | geoip_match(" | + | </ |
- | if($gip(src=> | + | This is a core statement that return the 2nd parameter |
- | { | + | |
- | # source and destination from same country | + | |
- | } | + | |
+ | Example: | ||
+ | |||
+ | <code c> | ||
+ | $var(x) = selval($Ts mod 2, " | ||
</ | </ | ||
- | ===== TLS module Pseudo-Variables ===== | + | The first parameter is a conditional expression, like those used for IF, the 2nd and 3rd parameters can be expressions like those used in the right side of assignments. |
+ | ==== set_advertised_address | ||
- | ==== $tls_version ==== | + | Same as ' |
- | The TLS/SSL version which is used on the TLS connection from which the message | + | |
- | ==== $tls_description ==== | + | |
- | The TLS/SSL description of the TLS connection from which the message was received. String type. | + | |
- | ==== $tls_cipher_info ==== | + | |
- | The TLS/SSL cipher which is used on the TLS connection from which the message was received. String type. | + | |
- | ==== $tls_cipher_bits ==== | + | |
- | The number of cipher bits which are used on the TLS connection from which the message was received. String and Integer type. | + | |
- | ==== $tls_peer_version ==== | + | |
- | The version of the certificate. String type. | + | |
- | ==== $tls_my_version ==== | + | |
- | The version of the certificate. String type. | + | |
- | ==== $tls_peer_serial ==== | + | |
- | The serial number of the certificate. String and Integer type. | + | |
- | ==== $tls_my_serial ==== | + | |
- | The serial number of the certificate. String and Integer type. | + | |
- | ==== $tls_peer_subject ==== | + | |
- | ASCII dump of the fields in the subject section of the certificate. String type. Example: | + | |
- | / | + | |
- | ==== $tls_peer_issuer ==== | + | |
- | ASCII dump of the fields in the issuer section of the certificate. String type. | + | |
- | ==== $tls_my_subject ==== | + | |
- | ASCII dump of the fields in the subject section of the certificate. String type. | + | |
- | ==== $tls_my_issuer ==== | + | |
- | ASCII dump of the fields in the issuer section of the certificate. String type. | + | |
- | ==== $tls_peer_subject_cn ==== | + | |
- | commonName in the subject section of the certificate. String type. | + | |
- | ==== $tls_peer_issuer_cn ==== | + | |
- | commonName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_my_subject_cn ==== | + | |
- | commonName in the subject section of the certificate. String type. | + | |
- | ==== $tls_my_issuer_cn ==== | + | |
- | commonName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_peer_subject_locality ==== | + | |
- | localityName in the subject section of the certificate. String type. | + | |
- | ==== $tls_peer_issuer_locality ==== | + | |
- | localityName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_my_subject_locality ==== | + | |
- | localityName in the subject section of the certificate. String type. | + | |
- | ==== $tls_my_issuer_locality ==== | + | |
- | localityName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_peer_subject_country ==== | + | |
- | countryName in the subject section of the certificate. String type. | + | |
- | ==== $tls_peer_issuer_country ==== | + | |
- | countryName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_my_subject_country ==== | + | |
- | countryName in the subject section of the certificate. String type. | + | |
- | ==== $tls_my_issuer_country ==== | + | |
- | countryName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_peer_subject_state ==== | + | |
- | stateOrProvinceName in the subject section of the certificate. String type. | + | |
- | ==== $tls_peer_issuer_state ==== | + | |
- | stateOrProvinceName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_my_subject_state ==== | + | |
- | stateOrProvinceName in the subject section of the certificate. String type. | + | |
- | ==== $tls_my_issuer_state ==== | + | |
- | stateOrProvinceName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_peer_subject_organization ==== | + | |
- | organizationName in the subject section of the certificate. String type. | + | |
- | ==== $tls_peer_issuer_organization ==== | + | |
- | organizationName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_my_subject_organization ==== | + | |
- | organizationName in the subject section of the certificate. String type. | + | |
- | ==== $tls_my_issuer_organization ==== | + | |
- | organizationName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_peer_subject_unit ==== | + | |
- | organizationalUnitName in the subject section of the certificate. String type. | + | |
- | ==== $tls_peer_issuer_unit ==== | + | |
- | organizationalUnitName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_my_subject_unit ==== | + | |
- | organizationalUnitName in the subject section of the certificate. String type. | + | |
- | ==== $tls_my_issuer_unit ==== | + | |
- | organizationalUnitName in the issuer section of the certificate. String type. | + | |
- | ==== $tls_peer_san_email ==== | + | |
- | email address in the " | + | |
- | ==== $tls_my_san_email ==== | + | |
- | email address in the " | + | |
- | ==== $tls_peer_san_hostname ==== | + | |
- | hostname (DNS) in the " | + | |
- | ==== $tls_my_san_hostname ==== | + | |
- | hostname (DNS) in the " | + | |
- | ==== $tls_peer_san_uri ==== | + | |
- | URI in the " | + | |
- | ==== $tls_my_san_uri ==== | + | |
- | URI in the " | + | |
- | ==== $tls_peer_san_ip ==== | + | |
- | ip address in the " | + | |
- | ==== $tls_my_san_ip ==== | + | |
- | ip address in the " | + | |
- | ==== $tls_peer_verified ==== | + | Example of usage: |
- | Returns 1 if the peer's certificate was successfully verified. Otherwise it returns 0. String and Integer type. | + | |
- | ==== $tls_peer_revoked ==== | + | set_advertised_address(" |
- | Returns 1 if the peer's certificate was revoked. Otherwise it returns 0. String and Integer type. | + | |
- | ==== $tls_peer_expired | + | ==== set_advertised_port |
- | Returns 1 if the peer's certificate is expired. Otherwise it returns 0. String and Integer type. | + | |
- | ==== $tls_peer_selfsigned ==== | + | Same as 'advertised_port' |
- | Returns 1 if the peer's certificate is selfsigned. Otherwise | + | |
- | ==== $tls_peer_notBefore ==== | + | Example |
- | Returns the notBefore validity date of the peer's certificate. String type. | + | |
- | ==== $tls_peer_notAfter ==== | + | set_advertised_port(5080); |
- | Returns the notAfter validity date of the peer's certificate. String type. | + | |
- | ==== $tls_peer_server_name ==== | + | ==== set_forward_no_connect |
- | The SNI server name of the peer | + | |
- | ===== SIP Message Attributes ===== | + | |
- | ==== $msg(attr) ==== | + | The message will be forwarded only if there is already an existing connection to the destination. It applies only to connection oriented protocols like TCP and TLS (TODO: SCTP), for UDP it will be ignored. The behavior depends in which route block the function is called: |
- | Return attributes of SIP message: | + | * normal request route: affects stateless forwards and tm. For tm it affects all the branches and the possible retransmissions (in fact there are no retransmission for TCP/TLS). |
- | * $msg(len) - sip message length | + | * onreply_route[0] |
- | | + | |
- | * $msg(body) - sip message body | + | |
- | | + | |
- | * $msg(hdrs) - sip message headers | + | |
- | * $msg(fline) - sip message first line | + | |
- | ===== XHTTP module Pseudo-Variables ===== | + | * onreply_route[!=0] < |
- | ==== $hu ==== | + | * branch_route: |
- | * URL of http request. | + | * onsend_route: |
- | ===== MSRP Module Pseudo Variables ===== | + | Example of usage: |
- | This class of pseudo-variables is exported by MSRP module and give access | + | route { |
- | ==== $msrp(buf) ==== | + | ... |
+ | if (lookup()) { | ||
+ | // | ||
+ | //to establish a new TCP connection | ||
+ | set_forward_no_connect(); | ||
+ | t_relay(); | ||
+ | } | ||
+ | ... | ||
+ | } | ||
- | The entire content of MSRP frame - first line, headers, body and end-line. | + | ==== set_forward_close |
- | ==== $msrp(body) | + | |
- | The body of MSRP frame. | + | Try to close the connection (the one on which the message is sent out) after forwarding the current message. Can be used in same route blocks as set_forward_no_connect(). |
- | ==== $msrp(code) ==== | + | |
- | The code of MSRP replies. | + | Note: Use with care as you might not receive the replies |
- | ==== $msrp(hdrs) ==== | + | |
- | The headers in a MSRP frame. | ||
- | ==== $msrp(msgid) ==== | ||
- | The body of Message-Id header. | + | ==== set_reply_no_connect |
- | ==== $msrp(method) | + | |
- | The method of a MSRP request. | + | Like set_forward_no_connect(), but for replies to the current message (local generated replies and replies forwarded by tm). The behavior depends in which route block the function is called: |
- | ==== $msrp(buflen) ==== | + | |
- | The length of entire MSRP frame. | + | * normal request route: affects all replies sent back on the transaction |
- | ==== $msrp(sessid) ==== | + | |
- | The session id for MSRP frame. It is taken from the first MSRP URI in To-Path header. | + | * onreply_route: |
- | ==== $msrp(reason) ==== | + | |
- | The reason text in a MSRP reply. | + | * branch_route: |
- | ==== $msrp(crthop) ==== | + | |
- | The URI for current hop - it is the first URI in To-Path header. | + | * onsend_route: |
- | ==== $msrp(bodylen) ==== | + | |
- | The length of the body in MSRP frame. | ||
- | ==== $msrp(transid) ==== | + | Example of usage: |
- | The transaction ID from the first line of MSRP frame. | + | route[4] { |
- | ==== $msrp(prevhop) ==== | + | // |
+ | //to establish a new TCP connection for the replies | ||
+ | set_reply_no_connect(); | ||
+ | // do authentication and call routing | ||
+ | ... | ||
+ | } | ||
- | The MSRP URI of the previous hop - the first address in From-Path header. | + | ==== set_reply_close |
- | ==== $msrp(nexthop) | + | |
- | The URI of the next hop - the second address | + | Like set_reply_no_connect, |
- | ==== $msrp(lasthop) ==== | + | |
- | The last hop URI - the last address in To-Path header. | + | Example of usage: |
- | ==== $msrp(srcaddr) ==== | + | |
- | The address of the previous hop set as MSRP URI using received source IP and port. | + | route { |
- | ==== $msrp(srcsock) ==== | + | ... |
+ | if (...caller-is-not-registered...) { | ||
+ | // reject unregistered client | ||
+ | // if request was received via TCP/TLS close the connection, | ||
+ | // this may trigger re-registration of the client. | ||
+ | | ||
+ | sl_send_reply(" | ||
+ | exit; | ||
+ | } | ||
+ | ... | ||
+ | } | ||
- | The local socket where the MSRP frame was received, set as **proto: | ||
- | ==== $msrp(firsthop) ==== | ||
- | The URI of the first hop - the last address in From-Path header. | + | ==== setavpflag |
- | ==== $msrp(prevhops) | + | |
- | The number of previous hops - it is the number of addresses in From-Path header. | + | ==== setflag |
- | ==== $msrp(nexthops) | + | |
- | The number | + | Set a flag for current processed message. |
- | ==== $msrp(conid) ==== | + | For more see: https:// |
- | The internal integer id for TCP/TLS connection. | + | Example of usage: |
- | ===== SIPT module Pseudo-Variables ===== | + | setflag(3); |
- | ==== $sipt(calling_party_number.presentation) / $sipt_presentation | + | ==== strip ==== |
- | Returns the value of the Address presentation restricted indicator contained in the Calling Party Number header of the IAM message if it exists. Returns -1 if there isn't a Calling Party Number header. | + | |
- | The following values can be returned: | + | Strip the first N-th characters from username of R-URI (N is the value of the parameter). |
- | * 0 presentation allowed | + | |
- | * 1 resentation restricted | + | Example of usage: |
- | | + | |
- | * 3 spare | + | |
+ | |||
+ | ==== strip_tail ==== | ||
+ | |||
+ | Strip the last N-th characters from username of R-URI (N is the value of the parameter). | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | | ||
+ | |||
+ | ==== udp_mtu_try_proto(proto) ==== | ||
+ | |||
+ | * proto - TCP|TLS|SCTP|UDP - like udp_mtu_try_proto global parameter but works on a per packet basis and not globally. | ||
Example: | Example: | ||
- | < | + | < |
- | if($sipt(calling_party_number.presentation) | + | if($rd==" |
- | { | + | |
- | append_hf(" | + | |
- | $fn = " | + | |
- | } | + | |
</ | </ | ||
+ | ==== userphone ==== | ||
- | ==== $sipt(calling_party_number.screening) / $sipt_screening ==== | + | Add "user=phone" parameter to R-URI. |
- | Returns the value of the Screening Indicator contained in the Calling Party Number header of the IAM message if it exists. Returns | + | |
- | Can return | + | ===== Custom Global Parameters ===== |
- | * 0 Reserved (user provided, not verified) | + | |
- | * 1 User Provided, Verified and Passed | + | These are parameters that can be defined by the writer of kamailio.cfg in order to be used inside routing blocks. One of the important properties for custom global parameters is that their value can be changed at runtime via RPC commands, without restarting Kamailio. |
- | * 2 Reserved (user provided, verified and failed) | + | |
- | * 3 Network provided | + | The definition of a custom global parameter must follow the pattern: |
+ | |||
+ | < | ||
+ | group.variable = value desc " | ||
+ | |||
+ | </ | ||
+ | |||
+ | The value can be a quoted string or integer number. | ||
Example: | Example: | ||
+ | |||
<code c> | <code c> | ||
- | # remove P-Asserted-Identity header if the screening isn't verified | + | pstn.gw_ip = "1.2.3.4" desc "PSTN GW Address" |
- | # or network provided | + | |
- | $avp(s: | + | |
- | if($avp(s: | + | |
- | { | + | |
- | remove_hf("P-Asserted-Id"); | + | |
- | } | + | |
</ | </ | ||
+ | The custom global parameter can be accessed inside a routing block via: | ||
- | ==== | + | < |
- | Returns the value of the Hop Counter for the IAM message if it exists. Returns -1 if there isn't a hop counter. | + | $sel(cfg_get.group.variable) |
+ | </ | ||
Example: | Example: | ||
+ | |||
+ | <code c> | ||
+ | $ru = " | ||
+ | </ | ||
+ | |||
+ | **Note:** Some words cannot be used as (part of) names for custom variables or groups, and if they are used a syntax error is logged | ||
+ | |||
+ | ===== Routing Blocks ===== | ||
+ | |||
+ | The routing blocks are the parts of the configuration file executed by kamailio at runtime. They can be seen as blocks of actions similar to functions (or procedures) from common programming languages. | ||
+ | |||
+ | A routing block is identified by a specific token, followed by a name in between square brackets and actions in between curly braces. | ||
+ | |||
<code c> | <code c> | ||
- | # get the hop counter and update the Max-Forwards header if it exists | + | route_block_id[NAME] |
- | $avp(s:hop) = $sipt(hop_counter); | + | |
- | if($avp(s: | + | |
- | { | + | |
- | | + | |
- | append_hf(" | + | |
} | } | ||
</ | </ | ||
- | ==== $sipt(calling_party_category) / $sipt(cpc) / $sipt_cpc ==== | + | The name can be any alphanumeric string, with specific routing blocks enforcing |
- | Returns the value of the Calling Party Category for the IAM message. Returns -1 if there is a parsing error. | + | |
- | ==== $sipt(calling_party_number.nature_of_address) / $sipt.(calling_party_number.nai) / $sipt_calling_party_nai ==== | + | <fc # |
- | Returns the value of the Nature of Address Indicator of the Calling Party for the IAM message. Returns -1 if there is a parsing error or if the Calling Party Number is not present. | + | |
- | Can return the following values: | + | Route blocks can be executed on network events |
- | * 0 Spare | + | |
- | * 1 Subscriber Number | + | There can be so called sub-route blocks, which can be invoked from another route blocks, like a function. Invocation is done with ' |
- | * 2 Unknown | + | |
- | * 3 National (significant) number (national use) | + | |
- | * 4 International use | + | |
Example: | Example: | ||
+ | |||
<code c> | <code c> | ||
- | # get the Calling Nai and add country | + | request_route{ |
- | if($sipt(calling_party_number.nai) == 3) | + | ... |
- | { | + | route(" |
- | $fU = "32" | + | ... |
+ | } | ||
+ | |||
+ | route[" | ||
+ | ... | ||
+ | } | ||
+ | </ | ||
+ | |||
+ | ==== request_route ==== | ||
+ | |||
+ | Request routing block - is executed for each SIP request. | ||
+ | |||
+ | It contains a set of actions to be executed for SIP requests received from the network. It is the equivalent of *main()* function for handling the SIP requests. | ||
+ | |||
+ | < | ||
+ | |||
+ | The implicit action after execution of the main route block is to drop the SIP request. To send a reply or forward the request, explicit actions (e.g., sl_send_reply(), | ||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | <code c> | ||
+ | request_route { | ||
+ | | ||
+ | # send reply for each options request | ||
+ | sl_send_reply(" | ||
+ | exit(); | ||
+ | } | ||
+ | | ||
+ | } | ||
+ | route[FWD] { | ||
+ | # forward according to uri | ||
+ | | ||
+ | } | ||
+ | </ | ||
+ | |||
+ | ==== route ==== | ||
+ | |||
+ | This block is used to define ' | ||
+ | |||
+ | The definition of the sub-route block follows the general rules, with a name in between square brackets and actions between curly braces. A sub-route can return an integer value back to the routing block that executed it. The return code can be retrieved via $rc variables. | ||
+ | |||
+ | Evaluation of the return of a subroute is done with following rules: | ||
+ | * negative value is evaluated as false | ||
+ | * 0 - is interpreted as **exit** | ||
+ | * positive value is evaluated as true | ||
+ | |||
+ | |||
+ | <code c> | ||
+ | request_route { | ||
+ | if(route(POSITIVE)) { | ||
+ | | ||
+ | } | ||
+ | if( ! route(NEGATIVE)) | ||
+ | xlog("return number is negative\n"); | ||
+ | } | ||
+ | if( route(ZERO)) { | ||
+ | xlog("this log message does not appear\n"); | ||
+ | } | ||
+ | } | ||
+ | |||
+ | route[POSITIVE] { | ||
+ | return 10; | ||
+ | } | ||
+ | |||
+ | route[NEGATIVE] { | ||
+ | return -8; | ||
+ | } | ||
+ | |||
+ | route[ZERO] { | ||
+ | return 0; | ||
} | } | ||
</ | </ | ||
- | ==== $sipt(called_party_number.nature_of_address) / $sipt(called_party_number.nai) / $sipt_called_party_nai ==== | + | A sub-route can execute another sub-route. There is a limit to the number |
- | Returns | + | |
- | Can return | + | The sub-route blocks allow to make the configuration file modular, simplifying the logic and helping to avoid duplication of actions. |
+ | ==== branch_route ==== | ||
- | * 0 Spare | + | Request' |
- | * 1 Subscriber Number | + | |
- | * 2 Unknown | + | Example of usage: |
- | * 3 National | + | |
- | * 4 International use | + | <code c> |
- | * 5 Network-specific number | + | request_route { |
+ | lookup(" | ||
+ | | ||
+ | | ||
+ | | ||
+ | } | ||
+ | } | ||
+ | branch_route[OUT] { | ||
+ | if(uri=~" | ||
+ | # discard branches that go to 10.10.10.10 | ||
+ | drop(); | ||
+ | } | ||
+ | } | ||
+ | </ | ||
+ | |||
+ | ==== failure_route ==== | ||
+ | |||
+ | Failed transaction routing block. It contains a set of actions to be taken each transaction that received only negative replies (>=300) for all branches. The ' | ||
+ | |||
+ | Note that in ' | ||
+ | |||
+ | |||
+ | Example of usage: | ||
+ | |||
+ | <code c> | ||
+ | request_route { | ||
+ | lookup(" | ||
+ | t_on_failure(" | ||
+ | if(!t_relay()) { | ||
+ | sl_send_reply(" | ||
+ | } | ||
+ | } | ||
+ | failure_route[TOVOICEMAIL] { | ||
+ | if(is_method(" | ||
+ | # call failed | ||
+ | | ||
+ | } | ||
+ | } | ||
+ | </ | ||
+ | |||
+ | ==== reply_route ==== | ||
+ | |||
+ | Main SIP response (reply) handling block - it contains a set of actions to be executed for SIP replies. It is executed for all replies received from the network. | ||
+ | |||
+ | It does not have a name and it is executed by the core, before any other module handling the SIP reply. It is triggered only by SIP replies received on the network. | ||
+ | |||
+ | There is no network route that can be enforced for a SIP reply - it is sent based on Via header, according to SIP RFC3261 - therefore no dedicated actions for forwarding the reply must be used in this block. | ||
+ | |||
+ | This routing block is optional, if missing, the SIP reply is sent to the address in 2nd Via header. | ||
+ | |||
+ | One can decide to drop a SIP reply by using **drop** action. | ||
Example: | Example: | ||
+ | |||
<code c> | <code c> | ||
- | # get the Called Nai and add country code if national | + | reply_route { |
- | if($sipt(called_party_number.nai) | + | if(status==" |
- | { | + | drop; |
- | $rU = " | + | } |
} | } | ||
</ | </ | ||
- | ==== $sipt(event_info) === | + | <fc # |
- | Returns | + | |
- | Can return the following values: | + | ==== onreply_route ==== |
- | * 0 Spare | + | |
- | * 1 ALERTING | + | |
- | * 2 PROGRESS | + | |
- | * 3 In-band information or an appropriate pattern is now available | + | |
- | * 4 Call forward on busy | + | |
- | * 5 Call forward on no reply | + | |
- | * 6 Call forward unconditional | + | |
- | ==== $sipt(backward_call_indicator.charge_indicator) === | + | SIP reply routing block executed by **tm** module. It contains a set of actions to be taken for SIP replies in the contect |
- | Returns the value of the charge indication | + | |
- | indicator header in the ACM or COT message. Returns -1 if there is a | + | |
- | parsing error | + | |
- | Can return | + | The ' |
- | * 0 no indication | + | |
- | * 1 no charge | + | |
- | * 2 charge | + | |
- | * 3 spare | + | |
+ | Core ' | ||
- | ===== $cfg(key) - Config File Attributes ===== | + | <code c> |
+ | request_route { | ||
+ | lookup(" | ||
+ | t_on_reply(" | ||
+ | if(!t_relay()) { | ||
+ | sl_send_reply(" | ||
+ | } | ||
+ | } | ||
- | Attributes related to configuration file. | + | reply_route { |
+ | if(!t_check_trans()) { | ||
+ | drop; | ||
+ | } | ||
+ | } | ||
- | The key can be: | + | onreply_route[LOGRPL] { |
+ | if(status=~" | ||
+ | | ||
+ | } | ||
+ | } | ||
+ | </ | ||
+ | ==== onsend_route ==== | ||
- | * line - return | + | The route is executed in when a SIP request is sent out. Only a limited number of commands are allowed (drop, if + all the checks, msg flag manipulations, |
- | * name - return | + | |
- | * file - return | + | In this route the final destination |
- | | + | |
+ | This route is executed only when forwarding requests | ||
Example: | Example: | ||
<code c> | <code c> | ||
- | send_reply(" | + | onsend_route { |
+ | if(to_ip==1.2.3.4 && !isflagset(12)){ | ||
+ | log(1, " | ||
+ | drop; | ||
+ | } | ||
+ | } | ||
</ | </ | ||
- | ===== $dns(pvid=> | + | * snd_ip, snd_port - behave like src_ip/ |
+ | * to_ip, to_port - like above, but contain the ip/port the message will be sent to (not to be confused with dst_ip/ | ||
+ | * snd_proto, snd_af | ||
+ | * msg:len - when used in an onsend_route, | ||
- | This variable stores the DNS result details after a call of dns_query(hostname, | + | ==== event_route ==== |
- | * pvid can be any string | + | Generic |
- | * key can be: | + | |
- | * count - number of addresses | + | |
- | * ipv4 - set to 1 if at least one ipv4 address (otherwise 0) | + | |
- | * ipv6 - set to 1 if at least one ipv6 address (otherwise 0) | + | |
- | * addr[index] - the address as string from position index in the list (0 based indexing) | + | |
- | * type[index] - the type of address from position index in the list (0 based indexing), the value is 4 for ipv4 and 6 for ipv6 | + | |
- | The index can be an integer or a variable with integer value. First address has the index 0. If negative value, | + | Prototype: event_route[groupid: |
+ | * groupid - should | ||
+ | * eventid - some meaningful short text describing | ||
+ | |||
+ | === Core Event Routes === | ||
+ | |||
+ | Implementations: | ||
+ | |||
+ | * **event_route[core: | ||
+ | * note that due to forking, other sip workers can get faster to listening for sip traffic | ||
<code c> | <code c> | ||
- | if(dns_query(" | + | event_route[core:worker-one-init] |
- | { | + | xlog("L_INFO","Hello world\n"); |
- | xlog(" number of addresses: $dns(xyz=> | + | |
- | xlog(" ipv4 address found: $dns(xyz=> | + | |
- | xlog(" ipv6 address found: $dns(xyz=> | + | |
- | $var(i) = 0; | + | |
- | while($var(i)& | + | |
- | xlog(" | + | |
- | " | + | |
- | $var(i) = $var(i) + 1; | + | |
- | } | + | |
} | } | ||
</ | </ | ||
- | ===== $HN(key) - Hostname details ===== | + | * **event_route[core: |
+ | * it has to be enabled with received_route_mode global parameter. For usage via Kemi, set kemi.received_route_callback global parameter. | ||
+ | * if drop is executed, the received message is no longer processed | ||
- | Give local hostname details | + | <code c> |
+ | event_route[core: | ||
+ | xlog("rcv on $rcv(af)/ | ||
+ | if($rcv(srcip) == "1.2.3.4" | ||
+ | drop; | ||
+ | } | ||
+ | } | ||
+ | </ | ||
- | The key can be: | + | * **event_route[core:pre-routing]** - executed by core on receiving SIP traffic before running request_route or reply_route. |
- | * n - the hostname | + | * if drop is used, then the message is not processed further with request_route or reply_route in the same process. This can be useful together with sworker module which can delegate |
- | | + | |
- | * d - the domain | + | |
- | * i - the ip address | + | |
<code c> | <code c> | ||
- | xlog("local hostanme is $HN(n)\n"); | + | async_workers_group="name=reg; |
+ | ... | ||
+ | event_route[core: | ||
+ | xinfo(" | ||
+ | if(is_method(" | ||
+ | # delegate processing of REGISTERs to a special group of workers | ||
+ | if(sworker_task(" | ||
+ | drop; | ||
+ | } | ||
+ | } | ||
+ | } | ||
</ | </ | ||
- | ===== $RANDOM | + | * ** event_route[core: |
+ | * note that the SIP message is broken in this case, but it gets access to source and local socket addresses (ip, port, proto, af) as well as the whole message buffer and its size | ||
- | Returns a random value from the [0 - 2^31) range. | + | <code c> |
+ | event_route[core: | ||
+ | xlog(" | ||
+ | } | ||
+ | |||
+ | </ | ||
+ | |||
+ | === Module Event Routes === | ||
+ | |||
+ | Here are only a few examples, to see if a module exports event_route blocks and when they are executed, check the readme of the module. | ||
- | (Part of the cfgutils module) | ||
+ | * **event_route[htable: | ||
<code c> | <code c> | ||
- | if (rand_event()) { | + | modparam(" |
- | $avp(i:10) = ($RANDOM / 16777216); # 2^24 | + | |
- | if ($avp(i:10) < 10) { | + | event_route[htable: |
- | | + | $sht(a=> |
+ | | ||
+ | } | ||
+ | |||
+ | request_route { | ||
+ | if(is_method(" | ||
+ | { | ||
+ | switch($rd) { | ||
+ | case " | ||
+ | lock(" | ||
+ | $sht(a=> | ||
+ | $sht(a=> | ||
+ | unlock(" | ||
+ | if($sht(a=> | ||
+ | { | ||
+ | | ||
+ | | ||
+ | } | ||
+ | break; | ||
+ | ... | ||
+ | } | ||
} | } | ||
- | append_to_reply(" | + | } |
- | | + | </ |
- | | + | * **event_route [tm:local-request]** - executed on locally generated requests. |
- | }; | + | <code c> |
- | # normal message processing follows | + | event_route [tm:local-request] { # Handle locally generated requests |
+ | | ||
+ | | ||
+ | } | ||
</ | </ | ||
- | ===== JSONRPCS Variables ===== | + | * **event_route [tm: |
+ | <code c> | ||
+ | request_route { | ||
+ | ... | ||
+ | t_on_branch_failure(" | ||
+ | t_relay(); | ||
+ | } | ||
- | ==== $jsonrpl(key) - JSONRPC Reply ==== | + | event_route[tm: |
+ | xlog(" | ||
+ | if (t_check_status(" | ||
+ | unregister(" | ||
+ | if (t_next_contact_flow()) { | ||
+ | t_relay(); | ||
+ | } | ||
+ | } | ||
+ | } | ||
- | This variable gives access to JSONRPC reply after executing jsonrpc_exec(...) in kamailio.cfg. | + | </ |
- | The key can be: | + | ===== Script Statements ===== |
- | * code - code for the JSONRPC response | + | |
- | * text - text of the code for the JSONRPC response | + | |
- | * body - the body of the JSONRPC response | + | |
- | ===== Presence Module Pseudo-Variables ===== | + | ==== if ==== |
+ | IF-ELSE statement | ||
- | ==== $subs(key) - Subscription Attributes ==== | + | Prototype: |
- | This variable gives access to attributes of the current subscription. The variable has to be used after executing // | + | < |
+ | if(expr) { | ||
+ | | ||
+ | } else { | ||
+ | | ||
+ | } | ||
+ | </code> | ||
- | The key can be: | + | The ' |
- | * uri - subscription URI. Useful in particular for subscriptions within the dialog, when the request URI in SUBSCRIBE is the Contact address from the initial subscription. | + | |
- | ===== Registrar Module Pseudo-Variables ===== | + | The logical operators that can be used in ' |
- | ==== $ulc(profile=>attr) - Registered Contact Attributes ==== | + | < |
+ | | ||
+ | != not equal | ||
+ | | ||
+ | !~ regular expression not-matching | ||
+ | > | ||
+ | >= | ||
+ | < | ||
+ | <= less or equal | ||
+ | && | ||
+ | || logical OR | ||
+ | ! | ||
+ | </ | ||
- | Access the attributes | + | Example |
- | It must be used after a call of “reg_fetch_contacts()”. | + | if(is_method(" |
+ | { | ||
+ | log(" | ||
+ | } else { | ||
+ | log(" | ||
+ | } | ||
- | ===== sipcapture Module Pseudo-Variables ===== | + | See also the FAQ for how the function return code is evaluated: |
- | ==== $hep(key) - HEP Packet Attributes | + | * https:// |
+ | ==== switch | ||
- | The key refers | + | SWITCH statement - it can be used to test the value of a pseudo-variable. |
- | * version | + | IMPORTANT NOTE: ' |
- | * src_ip | + | |
- | * dst_ip - destination IP address | + | |
- | * 0x000 - HEP attribute 0x000 | + | |
- | * 0x999 - HEP attribute 0x999 | + | |
- | ===== $C(xy) - Foreground and background colors ===== | ||
- | $C(xy) - reference to an escape sequence. “x” represents the foreground color and “y” represents the background color. | + | Example of usage: |
+ | < | ||
+ | route { | ||
+ | route(1); | ||
+ | switch($retcode) | ||
+ | { | ||
+ | case -1: | ||
+ | log(" | ||
+ | break; | ||
+ | case 1: | ||
+ | log(" | ||
+ | break; | ||
+ | case 2: | ||
+ | case 3: | ||
+ | log(" | ||
+ | break; | ||
+ | default: | ||
+ | log(" | ||
+ | } | ||
- | Colors could be: | + | # switch of R-URI username |
+ | switch($rU) | ||
+ | { | ||
+ | case " | ||
+ | log(" | ||
+ | break; | ||
+ | case " | ||
+ | log(" | ||
+ | break; | ||
+ | case " | ||
+ | case " | ||
+ | log(" | ||
+ | break; | ||
+ | default: | ||
+ | log(" | ||
+ | } | ||
+ | } | ||
- | * x : default color of the terminal | + | route[1]{ |
- | * s : Black | + | |
- | * r : Red | + | { |
- | * g : Green | + | |
- | * y : Yellow | + | }; |
- | * b : Blue | + | |
- | * p : Purple | + | |
- | * c : Cyan | + | } |
- | * w : White | + | |
+ | return(2); | ||
+ | } | ||
+ | if(is_method(" | ||
+ | return(3); | ||
+ | } | ||
+ | return(-2); | ||
+ | } | ||
+ | </ | ||
+ | NOTE: take care while using ' | ||
+ | ==== while ==== | ||
- | ===== Examples ===== | + | while statement |
+ | Example of usage: | ||
+ | | ||
+ | $var(i) = 0; | ||
+ | while($var(i) < 10) | ||
+ | { | ||
+ | xlog(" | ||
+ | $var(i) = $var(i) + 1; | ||
+ | } | ||
- | A few examples of usage. | + | ===== Script Operations ===== |
- | Example 1. Pseudo-variables usage | + | Assignments together with string and arithmetic operations can be done directly in configuration file. |
- | <code c> | + | ==== Assignment ==== |
- | ... | + | |
- | avp_aliases=" | + | Assignments can be done like in C, via '=' (equal). The following pseudo-variables can be used in left side of an assignment: |
- | ... | + | * Unordered List Item AVPs - to set the value of an AVP |
- | route { | + | * script variables ($var(...)) - to set the value of a script variable |
- | ... | + | * shared variables ($shv(...)) |
- | $avp(uuid)=" | + | |
- | $avp(i: | + | |
- | | + | * $rU - to set user part of R-URI |
- | ... | + | * $rp - to set the port of R-URI |
- | } | + | |
- | ... | + | * $fs - to set send socket |
+ | * $br - to set branch | ||
+ | * $mf - to set message flags value | ||
+ | * $sf - to set script flags value | ||
+ | * $bf - to set branch flags value | ||
+ | |||
+ | < | ||
+ | $var(a) = 123; | ||
</ | </ | ||
- | ==== Request-URI | + | For avp's there a way to remove all values |
+ | < | ||
+ | $(avp(i: | ||
+ | $(avp(i: | ||
+ | </ | ||
- | Following are some examples how RURI and DURI are parsed, for SIP-URIs, tel-URIs and Service-URNs: | + | ==== String Operations ==== |
+ | For strings, ' | ||
< | < | ||
- | === Request URI contains SIP URI === | + | $var(a) |
- | $ru = "sip:example.com" | + | $var(b) |
- | $rz = "sip" | + | </code> |
- | $rU = "<null>" | + | ==== Arithmetic Operations ==== |
- | $rd = " | + | |
- | $rp = " | + | |
- | $rP = " | + | |
- | === Request URI contains SIP URI === | + | For numbers, one can use: |
- | $ru = "sips:john.q.public:hispw@example.com:6061; | + | * + : plus |
- | | + | * - : minus |
- | | + | * / : divide |
- | | + | |
- | | + | |
- | | + | |
+ | | ||
+ | | ||
+ | * ~ : bitwise NOT | ||
+ | * < | ||
+ | * < | ||
- | === Request URI contains service URN === | ||
- | $ru = " | ||
- | $rz = " | ||
- | $rU = " | ||
- | $rd = " | ||
- | $rp = " | ||
- | $rP = " | ||
- | === Request URI contains tel: URI === | + | Example: |
- | $ru = "tel:+1-201-555-0123" | + | |
- | | + | < |
- | | + | $var(a) |
- | $rd = "<null>" | + | </ |
- | | + | |
- | | + | NOTE: to ensure the priority of operands in expression evaluations do use __parenthesis__. |
+ | |||
+ | Arithmetic expressions can be used in condition expressions. | ||
+ | |||
+ | < | ||
+ | if( $var(a) & 4 ) | ||
+ | log(" | ||
+ | </ | ||
+ | |||
+ | ===== Operators ===== | ||
+ | |||
+ | - type casts operators: (int), (str). | ||
+ | - string comparison: eq, ne | ||
+ | - integer comparison: ieq, ine | ||
+ | |||
+ | Note: The names are not yet final (use them at your own risk). Future version might use ==/!= only for ints (ieq/ine) and eq/ne for strings (under debate). They are almost equivalent to == or !=, but they force the conversion of their operands (eq to string and ieq to int), allowing among other things better type checking on startup and more optimizations. | ||
+ | |||
+ | Non equiv. examples: | ||
+ | |||
+ | 0 == "" (true) is not equivalent to 0 eq "" | ||
+ | |||
+ | " | ||
+ | |||
+ | Note: internally == and != are converted on startup to eq/ | ||
+ | |||
+ | - Kamailio tries to guess what the user wanted when operators that support multiple types are used on different typed operands. In general convert the right operand to the type of the left operand and then perform the operation. Exception: the left operand is undef. This applies to the following operators: +, == and !=. | ||
+ | | ||
+ | For +: undef + expr -> undef is converted to string => "" | ||
+ | For == and !=: undef == expr -> undef is converted to type_of expr. | ||
+ | If expr is undef, then undef == undef is true (internally is converted | ||
+ | to string). | ||
+ | |||
+ | | ||
+ | int(undef)==0, | ||
+ | str(undef)=="", str(123)==" | ||
+ | |||
+ | | ||
+ | defined expr - returns true if expr is defined, and false if not. | ||
+ | Note: only a standalone avp or pvar can be | ||
+ | | ||
+ | strlen(expr) | ||
+ | strempty(expr) - returns true if expr evaluates to the empty | ||
+ | | ||
+ | | ||
+ | |||
+ | ===== Command Line Parameters ===== | ||
+ | |||
+ | Kamailio can be started with a set of command line parameters, providing more flexibility to control what is doing at runtime. Some of them can be quite useful when running on containerised environments. | ||
+ | |||
+ | To see the the available command line parameters, run **kamailio -h**: | ||
+ | |||
+ | <code> | ||
+ | # kamailio -h | ||
+ | |||
+ | version: kamailio 5.4.0-dev4 (x86_64/ | ||
+ | Usage: kamailio [options] | ||
+ | Options: | ||
+ | -a mode Auto aliases mode: enable with yes or on, | ||
+ | disable with no or off | ||
+ | --alias=val | ||
+ | (like for ' | ||
+ | -A define | ||
+ | -A ' | ||
+ | -b nr Maximum receive buffer size which will not be exceeded by | ||
+ | auto-probing procedure even if OS allows | ||
+ | -c Check configuration file for syntax errors | ||
+ | -d | ||
+ | -D | ||
+ | -D..do not fork (almost) anyway; | ||
+ | -DD..do not daemonize creator; | ||
+ | -DDD..daemonize (default) | ||
+ | -e Log messages printed in terminal colors (requires -E) | ||
+ | -E Log to stderr | ||
+ | -f file Configuration file (default: / | ||
+ | -g gid | ||
+ | -G file Create a pgid file | ||
+ | -h This help message | ||
+ | --help | ||
+ | -I Print more internal compile flags and options | ||
+ | -K Turn on " | ||
+ | -l address | ||
+ | mean listening on more addresses). The address format is | ||
+ | [proto: | ||
+ | where proto=udp|tcp|tls|sctp, | ||
+ | addr_lst= addr|(addr, addr_lst), | ||
+ | addr=host|ip_address|interface_name and | ||
+ | advaddr=addr[: | ||
+ | E.g: -l localhost, -l udp: | ||
+ | -l udp: | ||
+ | -l "sctp: | ||
+ | The default behaviour is to listen on all the interfaces. | ||
+ | --loadmodule=name load the module specified by name | ||
+ | --log-engine=log engine name and data | ||
+ | -L path Modules search path (default: / | ||
+ | -m nr Size of shared memory allocated in Megabytes | ||
+ | --modparam=modname: | ||
+ | type has to be ' | ||
+ | example: --modparam=corex: | ||
+ | -M nr Size of private memory allocated, in Megabytes | ||
+ | -n processes Number of child processes to fork per interface | ||
+ | (default: 8) | ||
+ | -N | ||
+ | -O nr Script optimization level (debugging option) | ||
+ | -P file Create a pid file | ||
+ | -Q | ||
+ | -r Use dns to check if is necessary to add a " | ||
+ | field to a via | ||
+ | -R Same as `-r` but use reverse dns; | ||
+ | (to use both use `-rR`) | ||
+ | --server-id=num set the value for server_id | ||
+ | --subst=exp set a subst preprocessor directive | ||
+ | --substdef=exp set a substdef preprocessor directive | ||
+ | --substdefs=exp set a substdefs preprocessor directive | ||
+ | -S | ||
+ | -t dir | ||
+ | -T | ||
+ | -u uid | ||
+ | -v | ||
+ | --version | ||
+ | -V | ||
+ | -x name Specify internal manager for shared memory (shm) | ||
+ | - can be: fm, qm or tlsf | ||
+ | -X name Specify internal manager for private memory (pkg) | ||
+ | - if omitted, the one for shm is used | ||
+ | -Y dir | ||
+ | -w dir | ||
+ | -W type poll method (depending on support in OS, it can be: poll, | ||
+ | epoll_lt, epoll_et, sigio_rt, select, kqueue, / | ||
+ | </ | ||
+ | |||
+ | ==== Log Engine CLI Parameter ==== | ||
+ | |||
+ | The **--log-engine** parameter allows to specify what logging engine to be used, which is practically about the format of the log messages. If not set at all, then Kamailio does the classic style of line-based plain text log messages. | ||
+ | |||
+ | The value of this parameter can be **--log-engine=name** or **--log-engine=name: | ||
+ | |||
+ | The name of the log engine can be: | ||
+ | |||
+ | | ||
+ | * the **data** for **json** log engine can be a set of character flags: | ||
+ | * **a** - add log prefix as a special field | ||
+ | * **A** - do not add log prefix | ||
+ | * **c** - add Call-ID (when available) as a dedicated JSON attribute | ||
+ | * **M** - strip EOL (' | ||
+ | * **N** - do not add EOL at the end of JSON document | ||
+ | |||
+ | Example of JSON logs when running Kamailio with " | ||
+ | |||
+ | < | ||
+ | { " | ||
- | === Request URI contains tel: URI with phone-context === | + | { " |
- | $ru = "tel:7042; | + | |
- | $rz = "tel" | + | |
- | $rU = "7042" | + | |
- | $rd = "< | + | |
- | $rp = "5060" | + | |
- | $rP = "UDP" | + | |
- | === Destination URI (must be a SIP(S) URI) === | ||
- | $du = " | ||
- | $dd = " | ||
- | $dp = " | ||
- | $dP = " | ||
</ | </ |