22 Feb
2024
22 Feb
'24
6:40 p.m.
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### Description
The uri parser seems to fail in multiple ways on username-parameters. The ways it fails
depends on the presence of user-params in the incoming request and on adjustments to $ru,
$rd and $rU in the script.
My expectation is that the whole username, including user-params is *always* visible in
$rU. In reality, the user-params are absent or present depending on manipulations to the
uri in the script.
When setting $rU to a value with a user-param, that user-param is represented when reading
$ru, but not in $rU.
<!--
Explain what you did, what you expected to happen, and what actually happened.
-->
### Troubleshooting
#### Reproduction
I used below config script to test various scenario's.
```
debug=2
memlog=4
#fork=no # This option should not be present to enable forking but disable daemonize,
also -D commandline parameter is needed
log_stderror=yes
log_name="kamailio-test"
log_facility=LOG_LOCAL5
sip_warning=no
children=2
shm_mem_size=128
check_via=no # (cmd. line: -v)
dns=no # (cmd. line: -r)
rev_dns=no # (cmd. line: -R)
dns_use_search_list=no
use_dns_failover=yes
dns_srv_lb=yes
disable_tcp=yes
auto_aliases=no
listen=172.16.1.19:7060
loadmodule "sl.so"
loadmodule "pv.so"
loadmodule "xlog.so"
modparam("xlog", "prefix", "")
route {
xnotice("Incoming $rm to $rU\n");
xinfo("$$ru = $ru\n");
switch ($rU) {
case "100":
xnotice("Set $$rU = \"1234;first=yes\"\n");
$rU = "1234;first=yes";
xinfo("$$ru: $ru\n");
xinfo("$$rU: $rU\n");
if ($rU != "1234;first=yes") {
xerr("Fail!\n");
} else {
xinfo("Success!\n");
}
break;
case "200":
xnotice("Set $$rd = \"example.com;transport=udp\"\n");
$rd = "example.com;transport=udp";
xinfo("$$ru: $ru\n");
xinfo("$$rU: $rU\n");
xnotice("Set $$rU = \"1234;first=yes\"\n");
$rU = "1234;first=yes";
xinfo("$$ru: $ru\n");
xinfo("$$rU: $rU\n");
if ($rU != "1234;first=yes") {
xerr("Fail!\n");
} else {
xinfo("Success!\n");
}
break;
case "300":
xnotice("Set $$ru = \"sip:1234@example.com;transport=udp\"\n");
$ru = "sip:1234@example.com;transport=udp";
xinfo("$$ru: $ru\n");
xinfo("$$rU: $rU\n");
xnotice("Set $$rU = \"1234;first=yes\"\n");
$rU = "1234;first=yes";
xinfo("$$ru: $ru\n");
xinfo("$$rU: $rU\n");
if ($rU != "1234;first=yes") {
xerr("Fail!\n");
} else {
xinfo("Success!\n");
}
break;
case "400":
xnotice("Set $$ru =
\"sip:1234;first=yes@example.com;transport=udp\"\n");
$ru = "sip:1234;first=yes@example.com;transport=udp";
xinfo("$$ru: $ru\n");
xinfo("$$rU: $rU\n");
if ($rU != "1234;first=yes") {
xerr("Fail!\n");
} else {
xinfo("Success!\n");
}
xnotice("Set $$rU = \"1234;second=yes\"\n");
$rU = "1234;second=yes";
xinfo("$$ru: $ru\n");
xinfo("$$rU: $rU\n");
if ($rU != "1234;second=yes") {
xerr("Fail!\n");
} else {
xinfo("Success!\n");
}
break;
}
sl_send_reply(500, "Done");
exit;
}
```
Outputs:
---
```
1(2206122) NOTICE: Incoming INVITE to 100
1(2206122) INFO: $ru = sip:100@172.16.1.19:7060;user=phone
1(2206122) NOTICE: Set $rU = "1234;first=yes"
1(2206122) INFO: $ru: sip:1234;first=yes@172.16.1.19:7060;user=phone
1(2206122) INFO: $rU: 1234
1(2206122) ERROR: Fail!
```
Setting $rU with a user-param sets it correctly in $ru, but reading $rU back fails.
---
```
1(2206122) NOTICE: Incoming INVITE to 200
1(2206122) INFO: $ru = sip:200@172.16.1.19:7060;user=phone
1(2206122) NOTICE: Set $rd = "example.com;transport=udp"
1(2206122) INFO: $ru: sip:200@example.com;transport=udp:7060;user=phone
1(2206122) INFO: $rU: 200
1(2206122) NOTICE: Set $rU = "1234;first=yes"
1(2206122) INFO: $ru: sip:1234;first=yes@example.com;transport=udp:7060;user=phone
1(2206122) INFO: $rU: 1234
1(2206122) ERROR: Fail!
```
Same when setting $rd in advance.
---
```
1(2206122) NOTICE: Incoming INVITE to 300
1(2206122) INFO: $ru = sip:300@172.16.1.19:7060;user=phone
1(2206122) NOTICE: Set $ru = "sip:1234@example.com;transport=udp"
1(2206122) INFO: $ru: sip:1234@example.com;transport=udp
1(2206122) INFO: $rU: 1234
1(2206122) NOTICE: Set $rU = "1234;first=yes"
1(2206122) INFO: $ru: sip:1234;first=yes@example.com;transport=udp
1(2206122) INFO: $rU: 1234;first=yes
1(2206122) INFO: Success!
```
When setting $ru first with no user-param lets a later asssignment to $rU with user-param
succeed.
---
```
1(2206122) NOTICE: Incoming INVITE to 400
1(2206122) INFO: $ru = sip:400@172.16.1.19:7060;user=phone
1(2206122) NOTICE: Set $ru = "sip:1234;first=yes@example.com;transport=udp"
1(2206122) INFO: $ru: sip:1234;first=yes@example.com;transport=udp
1(2206122) INFO: $rU: 1234;first=yes
1(2206122) INFO: Success!
1(2206122) NOTICE: Set $rU = "1234;second=yes"
1(2206122) INFO: $ru: sip:1234;second=yes@example.com;transport=udp
1(2206122) INFO: $rU: 1234;second=yes
1(2206122) INFO: Success!
```
Setting $ru with a user-params succeeds. Subsequently overwriting the user part with $rU
with a user-param also succeeds.
---
```
1(2206122) NOTICE: Incoming INVITE to 400
1(2206122) INFO: $ru = sip:400;existing=yes@172.16.1.19:7060;user=phone
1(2206122) NOTICE: Set $ru = "sip:1234;first=yes@example.com;transport=udp"
1(2206122) INFO: $ru: sip:1234;first=yes@example.com;transport=udp
1(2206122) INFO: $rU: 1234;first=yes
1(2206122) INFO: Success!
1(2206122) NOTICE: Set $rU = "1234;second=yes"
1(2206122) INFO: $ru: sip:1234;second=yes@example.com;transport=udp
1(2206122) INFO: $rU: 1234;second=yes
1(2206122) INFO: Success!
```
Same as previous, but with incoming user-param.
---
```
1(2206122) NOTICE: Incoming INVITE to 100
1(2206122) INFO: $ru = sip:100;existing=yes@172.16.1.19:7060;user=phone
1(2206122) NOTICE: Set $rU = "1234;first=yes"
1(2206122) INFO: $ru: sip:1234;first=yes;existing=yes@172.16.1.19:7060;user=phone
1(2206122) INFO: $rU: 1234
1(2206122) ERROR: Fail!
```
This one fails in an interesting way. The incoming uri has a user-param. When overwriting
$rU with a user-param, the user-param from the incoming request is kept in addition to the
new one instead of being overwritten. $rU still misses (both) user-params.
#### Debugging Data
I have no build (yet) with EXTRA_DEBUG enabled.
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22 Feb
22 Feb
7:10 p.m.
Debug log with EXTRA_DEBUG enabled for call scenario 100:
```
1(2262224) DEBUG: <core> [core/udp_server.c:494]: udp_rcv_loop(): received on udp
socket: (106/100/493) [[INVITE sip:100@172.16.1.19:7060;user=phone SIP/2.0 0D 0A Via:
SIP/2.0/UDP 172.16.1.19:7001;branch=z9hG4bK]]
1(2262224) DEBUG: <core> [core/parser/parse_fline.c:249]: parse_first_line(): first
line type 1 (request) flags 1
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:677]: parse_msg(): SIP Request:
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:678]: parse_msg(): method:
<INVITE>
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:680]: parse_msg(): uri:
<sip:100@172.16.1.19:7060;user=phone>
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:682]: parse_msg(): version:
<SIP/2.0>
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:324]: parse_headers(): flags=2
1(2262224) DEBUG: <core> [core/parser/parse_hname2.c:301]: parse_sip_header_name():
parsed header name [Via] type 1
1(2262224) DEBUG: <core> [core/parser/parse_via.c:1300]: parse_via_param(): Found
param type 232, <branch> = <z9hG4bKa1-1>; state=16
1(2262224) DEBUG: <core> [core/parser/parse_via.c:2639]: parse_via(): end of header
reached, state=5
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:555]: parse_headers(): Via
found, flags=2
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:557]: parse_headers(): this is
the first via
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:618]: parse_headers(): header
field type 1, name=<Via>, body=<SIP/2.0/UDP
172.16.1.19:7001;branch=z9hG4bKa1-1>
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:709]: parse_msg(): first via:
<SIP/2.0/UDP> <172.16.1.19:7001(7001)> 1(2262224) DEBUG: <core>
[core/parser/msg_parser.c:717]: parse_msg(): ;<> 1(2262224) DEBUG: <core>
[core/parser/msg_parser.c:720]: parse_msg():
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:740]: parse_msg(): exiting
parse_msg
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:324]: parse_headers(): flags=78
1(2262224) DEBUG: <core> [core/parser/parse_hname2.c:301]: parse_sip_header_name():
parsed header name [From] type 4
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:618]: parse_headers(): header
field type 4, name=<From>, body=<"test"
<sip:+12345678@172.16.1.19:7001>;tag=1>
1(2262224) DEBUG: <core> [core/parser/parse_hname2.c:301]: parse_sip_header_name():
parsed header name [To] type 3
1(2262224) DEBUG: <core> [core/parser/parse_addr_spec.c:884]: parse_addr_spec():
end of header reached, state=10
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:172]: get_hdr_field():
<To> [39]; uri=[sip:100@172.16.1.19:7060;user=phone]
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:174]: get_hdr_field(): to body
(39)[<sip:100@172.16.1.19:7060;user=phone>
], to tag (0)[]
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:618]: parse_headers(): header
field type 3, name=<To>, body=<<sip:100@172.16.1.19:7060;user=phone>>
1(2262224) DEBUG: <core> [core/parser/parse_hname2.c:301]: parse_sip_header_name():
parsed header name [Call-ID] type 6
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:618]: parse_headers(): header
field type 6, name=<Call-ID>, body=<1-2262234(a)172.16.1.19>
1(2262224) DEBUG: <core> [core/parser/parse_hname2.c:301]: parse_sip_header_name():
parsed header name [CSeq] type 5
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:152]: get_hdr_field(): cseq
<CSeq>: <1> <INVITE>
1(2262224) DEBUG: <core> [core/parser/msg_parser.c:618]: parse_headers(): header
field type 5, name=<CSeq>, body=<1 INVITE>
1(2262224) DEBUG: <core> [core/receive.c:389]: receive_msg(): --- received sip
message - request - call-id: [1-2262234(a)172.16.1.19] - cseq: [1 INVITE]
1(2262224) DEBUG: <core> [core/receive.c:261]: ksr_evrt_pre_routing(): event route
core:pre-routing not defined
1(2262224) DEBUG: <core> [core/receive.c:471]: receive_msg(): preparing to run
routing scripts...
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1252]: parse_uri(): state=11
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1253]: parse_uri(): parsed uri:
type=3 user=<100>(3)
passwd=<>(0)
host=<172.16.1.19>(11)
port=<7060>(4): 7060
params=<>(0)
headers=<>(0)
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1264]: parse_uri(): uri flags :
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1266]: parse_uri(): sip_user_phone
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1267]: parse_uri(): value=2
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1268]: parse_uri(): uri params:
transport=<>, val=<>, proto=0
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1271]: parse_uri():
user-param=<user=phone>, val=<phone>
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1274]: parse_uri():
method=<>, val=<>
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1277]: parse_uri():
ttl=<>, val=<>
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1280]: parse_uri():
maddr=<>, val=<>
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1283]: parse_uri():
lr=<>
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1284]: parse_uri():
r2=<>
1(2262224) DEBUG: <core> [core/pvapi.c:1509]: pv_printf_mode(): final buffer length
23
1(2262224) NOTICE: Incoming INVITE to 100
1(2262224) DEBUG: <core> [core/pvapi.c:1509]: pv_printf_mode(): final buffer length
42
1(2262224) INFO: $ru = sip:100@172.16.1.19:7060;user=phone
1(2262224) DEBUG: <core> [core/pvapi.c:1509]: pv_printf_mode(): final buffer length
27
1(2262224) NOTICE: Set $rU = "1234;first=yes"
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1252]: parse_uri(): state=11
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1253]: parse_uri(): parsed uri:
type=3 user=<1234>(4)
passwd=<>(0)
host=<172.16.1.19>(11)
port=<7060>(4): 7060
params=<first=yes>(9)
headers=<>(0)
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1264]: parse_uri(): uri flags :
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1266]: parse_uri(): sip_user_phone
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1267]: parse_uri(): value=2
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1268]: parse_uri(): uri params:
transport=<>, val=<>, proto=0
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1271]: parse_uri():
user-param=<user=phone>, val=<phone>
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1274]: parse_uri():
method=<>, val=<>
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1277]: parse_uri():
ttl=<>, val=<>
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1280]: parse_uri():
maddr=<>, val=<>
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1283]: parse_uri():
lr=<>
1(2262224) DEBUG: <core> [core/parser/parse_uri.c:1284]: parse_uri():
r2=<>
1(2262224) DEBUG: <core> [core/pvapi.c:1509]: pv_printf_mode(): final buffer length
52
1(2262224) INFO: $ru: sip:1234;first=yes@172.16.1.19:7060;user=phone
1(2262224) DEBUG: <core> [core/pvapi.c:1509]: pv_printf_mode(): final buffer length
10
1(2262224) INFO: $rU: 1234
1(2262224) DEBUG: <core> [core/pvapi.c:1509]: pv_printf_mode(): final buffer length
6
1(2262224) ERROR: Fail!
```
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5 Mar
5 Mar
4:14 p.m.
Well this all is caused by the phone2tel parameter defaulting to "on" and the
fact that the pseudovars $rU/$rp/$$rz/etc are *NOT* in sync with what is in $ru.
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17 Apr
17 Apr
4:39 a.m.
New subject: [kamailio/kamailio] pseudovar $ru not in sync with $rz,$rU,$rp, etc (Issue #3762)
This issue is stale because it has been open 6 weeks with no activity. Remove stale label
or comment or this will be closed in 2 weeks.
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1 May
1 May
4:42 a.m.
New subject: [kamailio/kamailio] pseudovar $ru not in sync with $rz,$rU,$rp, etc (Issue #3762)
Closed #3762 as not planned.
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