Table of Contents
List of Examples
db_url parametersdp_mangle_ip usagesdp_mangle_port usageencode_contact usagedecode_contact usagedecode_contact_header usageTable of Contents
First char of this parameter is used as separator for encoding/decoding Contact header. If you set this parameter to "-", then an encoded uri might look sip:user-password-ip-port-protocol@PublicIP
First char of this field must be set to a value which is not used inside username,password or other fields of contact.Otherwise it is possible for the decoding step to fail/produce wrong results.
Default value is "*".
Changes IP addresses inside SDP package in lines describing connections like c=IN IP4 . Currently this function only changes IP4 addresses since IP6 probably will not need to traverse NAT :)
The function returns negative on error, or number of replacements + 1.
Meaning of the parameters is as follows:
pattern - A ip address/mask pair used to match IP's located inside SDP package in lines c=IN IP4 ip. This line will only be changed if located IP is in the network described by this pattern. Examples of valid patterns are "10.0.0.0/255.0.0.0" or "10.0.0.0/8" etc.
newip - A string representing the new IP to be put inside SDP package if old IP address matches pattern.
Changes ports inside SDP package in lines describing media like m=audio 13451.
The function returns negative on error, or number of replacements + 1.
Meaning of the parameters is as follows:
offset - A string representing an integer which will be added/subtracted from the located port.
This function will encode uri-s inside Contact header in the following manner sip:username:password@ip:port;transport=protocol goes sip:enc_pref*username*ip*port*protocol@public_ip. "*" (asterisk) is the default separator.
The function returns negative on error, 1 on success.
Meaning of the parameters is as follows:
encoding_prefix - Something to allow us to determine that a contact is encoded public ip--a routable IP, most probably you should put your external IP of your NAT box.
Example 1.4. encode_contact usage
...
if (src_ip == 10.0.0.0/8) encode_contact("enc_prefix","193.175.135.38");
...
This function will decode the URI in first line in packets which come with encoded URI in the following manner sip:enc_pref*username*ip*port*protocol*src_ip*src_port*src_proto@public_ip;parameters is converted to sip:username:password@ip:port;parameters and will set destination URI to sip:src_ip:src_port;transport=src_proto (so that the next forward() or t_relay() will send the message back to src_ip:src_port using src_proto). It uses the default set parameter for contact encoding separator.
The function returns negative on error, 1 on success.
This function will decode URIs inside Contact header in the same manner as decode_contact(). The difference is that no dst_uri is set (src_ip, src_port and src_proto are ignored) and instead of changing the request uri, the Contact header URI is modified. It uses the default set parameter for contact encoding separator.
The function returns negative on error, 1 on success.