18 Sep
2020
18 Sep
'20
12:25 p.m.
I can confirm there is a change in behaviour between 5.3 and 5.4 (I tested with master,
but it is the same code).
I made some small changes to the config to have more debug messages and be able to test
with OPTIONS sent by sipsak -- the full config is next:
```
####### Global Parameters #########
debug = 2
log_stderror = no
children = 2
####### Modules Section ########
# mpath="/usr/lib64/kamailio/modules/"
loadmodule "jsonrpcs.so"
loadmodule "kex.so"
loadmodule "corex.so"
loadmodule "tm.so"
loadmodule "tmx.so"
loadmodule "sl.so"
loadmodule "rr.so"
loadmodule "pv.so"
loadmodule "maxfwd.so"
loadmodule "textops.so"
loadmodule "siputils.so"
loadmodule "xlog.so"
loadmodule "sanity.so"
loadmodule "ctl.so"
loadmodule "debugger.so"
loadmodule "htable.so"
# ----- tm params -----
modparam("tm", "failure_reply_mode", 3)
modparam("tm", "remap_503_500", 0)
modparam("tm", "contacts_avp", "tm_contacts")
modparam("tm", "contact_flows_avp", "tm_contact_flows")
# ----- rr params -----
modparam("rr", "enable_full_lr", 0)
modparam("rr", "append_fromtag", 1)
# ----- htable params -----
modparam("htable", "htable", "gateways=>size=4")
request_route
{
if (!is_method("ACK")) {
if(t_precheck_trans()) {
t_check_trans();
exit;
}
t_check_trans();
}
if (!sanity_check("1535", "7")) {
exit;
}
if (!mf_process_maxfwd_header("10")) {
send_reply("483", "Too Many Hops");
exit;
}
if (has_totag()) {
if (is_method("INVITE")) {
record_route();
}
if (loose_route()) {
route(RELAY);
}
if (is_method("ACK")) {
if (t_check_trans()) {
route(RELAY);
}
exit;
}
send_reply("481", "Call Leg/Transaction Does Not Exist");
exit;
}
if (is_method("CANCEL")) {
if (t_check_trans()) {
route(RELAY);
} else {
send_reply("481", "Call leg/transaction does not exist");
}
exit;
} else if (is_method("ACK")) {
if (t_check_trans()) {
route(RELAY);
}
exit;
}
remove_hf("Route");
record_route();
$var(i) = 1;
while ($var(i) < 10) {
$sht(gateways=>$var(i)) = "host=" +
$_s($var(i).$var(i).$var(i).$var(i)) + ";priority=" + $var(i);
xnotice("==== Storing: $sht(gateways=>$var(i))\n");
$var(i) = $var(i) + 1;
}
sht_iterator_start("i", "gateways");
while(sht_iterator_next("i")) {
xnotice("==== Appending: sip:$rU@$(shtitval(i){param.value,host}) - p:
$_s(0.$(shtitval(i){param.value,priority}))\n");
append_branch("sip:$rU@$(shtitval(i){param.value,host})",
"$_s(0.$(shtitval(i){param.value,priority}))");
}
sht_iterator_end("i");
t_load_contacts();
xwarn("Route order:\n");
$var(i) = 1;
while (t_next_contacts()) {
xinfo("==== $var(i): $ru\n");
$var(i) = $var(i) + 1;
}
sl_send_reply("404", "Not routing");
exit;
route(RELAY);
}
route[RELAY] {
xlog ("L_INFO", "Routing to $rd/$du\n");
t_on_failure("OB_FAILURE");
if (!t_relay()) {
sl_reply_error();
}
exit;
}
failure_route[OB_FAILURE] {
if (t_is_canceled()) {
xlog("L_INFO", "Transaction cancelled\n");
exit;
}
if (!t_next_contacts() && $ru==$ou) {
send_reply("503", "Service Unavailable");
exit;
}
t_on_failure("OB_FAILURE");
route(RELAY);
exit;
}
```
The output with 5.3 branch was:
```
1(42162) NOTICE: <script>: ==== Storing: host=1.1.1.1;priority=1
1(42162) NOTICE: <script>: ==== Storing: host=2.2.2.2;priority=2
1(42162) NOTICE: <script>: ==== Storing: host=3.3.3.3;priority=3
1(42162) NOTICE: <script>: ==== Storing: host=4.4.4.4;priority=4
1(42162) NOTICE: <script>: ==== Storing: host=5.5.5.5;priority=5
1(42162) NOTICE: <script>: ==== Storing: host=6.6.6.6;priority=6
1(42162) NOTICE: <script>: ==== Storing: host=7.7.7.7;priority=7
1(42162) NOTICE: <script>: ==== Storing: host=8.8.8.8;priority=8
1(42162) NOTICE: <script>: ==== Storing: host=9.9.9.9;priority=9
1(42162) NOTICE: <script>: ==== Appending: sip:1234@6.6.6.6 - p: 0.6
1(42162) NOTICE: <script>: ==== Appending: sip:1234@7.7.7.7 - p: 0.7
1(42162) NOTICE: <script>: ==== Appending: sip:1234@4.4.4.4 - p: 0.4
1(42162) NOTICE: <script>: ==== Appending: sip:1234@5.5.5.5 - p: 0.5
1(42162) NOTICE: <script>: ==== Appending: sip:1234@2.2.2.2 - p: 0.2
1(42162) NOTICE: <script>: ==== Appending: sip:1234@3.3.3.3 - p: 0.3
1(42162) NOTICE: <script>: ==== Appending: sip:1234@1.1.1.1 - p: 0.1
1(42162) NOTICE: <script>: ==== Appending: sip:1234@9.9.9.9 - p: 0.9
1(42162) NOTICE: <script>: ==== Appending: sip:1234@8.8.8.8 - p: 0.8
1(42162) WARNING: <script>: Route order:
1(42162) INFO: <script>: ==== 1: sip:1234@9.9.9.9
1(42162) INFO: <script>: ==== 2: sip:1234@8.8.8.8
1(42162) INFO: <script>: ==== 3: sip:1234@7.7.7.7
1(42162) INFO: <script>: ==== 4: sip:1234@6.6.6.6
1(42162) INFO: <script>: ==== 5: sip:1234@5.5.5.5
1(42162) INFO: <script>: ==== 6: sip:1234@4.4.4.4
1(42162) INFO: <script>: ==== 7: sip:1234@3.3.3.3
1(42162) INFO: <script>: ==== 8: sip:1234@2.2.2.2
1(42162) INFO: <script>: ==== 9: sip:1234@1.1.1.1
1(42162) INFO: <script>: ==== 10: sip:1234@127.0.0.1
```
The output with 5.4 (master) is:
```
1(41335) NOTICE: <script>: ==== Storing: host=1.1.1.1;priority=1
1(41335) NOTICE: <script>: ==== Storing: host=2.2.2.2;priority=2
1(41335) NOTICE: <script>: ==== Storing: host=3.3.3.3;priority=3
1(41335) NOTICE: <script>: ==== Storing: host=4.4.4.4;priority=4
1(41335) NOTICE: <script>: ==== Storing: host=5.5.5.5;priority=5
1(41335) NOTICE: <script>: ==== Storing: host=6.6.6.6;priority=6
1(41335) NOTICE: <script>: ==== Storing: host=7.7.7.7;priority=7
1(41335) NOTICE: <script>: ==== Storing: host=8.8.8.8;priority=8
1(41335) NOTICE: <script>: ==== Storing: host=9.9.9.9;priority=9
1(41335) NOTICE: <script>: ==== Appending: sip:1234@6.6.6.6 - p: 0.6
1(41335) NOTICE: <script>: ==== Appending: sip:1234@7.7.7.7 - p: 0.7
1(41335) NOTICE: <script>: ==== Appending: sip:1234@4.4.4.4 - p: 0.4
1(41335) NOTICE: <script>: ==== Appending: sip:1234@5.5.5.5 - p: 0.5
1(41335) NOTICE: <script>: ==== Appending: sip:1234@2.2.2.2 - p: 0.2
1(41335) NOTICE: <script>: ==== Appending: sip:1234@3.3.3.3 - p: 0.3
1(41335) NOTICE: <script>: ==== Appending: sip:1234@1.1.1.1 - p: 0.1
1(41335) NOTICE: <script>: ==== Appending: sip:1234@9.9.9.9 - p: 0.9
1(41335) NOTICE: <script>: ==== Appending: sip:1234@8.8.8.8 - p: 0.8
1(41335) WARNING: <script>: Route order:
1(41335) INFO: <script>: ==== 1: sip:1234@127.0.0.1
1(41335) INFO: <script>: ==== 2: sip:1234@8.8.8.8
1(41335) INFO: <script>: ==== 3: sip:1234@7.7.7.7
1(41335) INFO: <script>: ==== 4: sip:1234@6.6.6.6
1(41335) INFO: <script>: ==== 5: sip:1234@5.5.5.5
1(41335) INFO: <script>: ==== 6: sip:1234@4.4.4.4
1(41335) INFO: <script>: ==== 7: sip:1234@3.3.3.3
1(41335) INFO: <script>: ==== 8: sip:1234@2.2.2.2
1(41335) INFO: <script>: ==== 9: sip:1234@1.1.1.1
```
I run kamailio from source directory of each version with the command:
```
./src/kamailio -f ../kamailio-t-load-contacts-order.cfg -L src/modules/ -w . -a no -E -e
-dd
```
The sent an OPTIONS with sipsak:
```
sipsak -s sip:1234@127.0.0.1
```
The 5.3 keeps the original R-URI, but becomes the last destination, having the priority 0.
The 5.4 keeps the original URI on the top of the list and loses the address with highest
priority added by append branch.
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