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It seems that problem is not in contact parsing. I think that object are in failed some state
In core dump we have what it seems to be a valid Contact field
#0 0x00007f0b29e26979 in fill_contact (ci=0x7fffff6755a0, m=0x7f0b2a68e780) at cmd.c:271
"<sip:alice@10.2.16.36:5060;gr=00F54E59-1172-EC11-9AC7-7D467C83D9C2>
----
INVITE sip:bob@ims.mnc001.mcc001.3gppnetwork.org SIP/2.0
Via: SIP/2.0/UDP 10.2.16.36:5060;branch=z9hG4bK8019dd952e72ec119bd47d467c83d9c2;rport
From: "PhonerLite" <sip:alice@ims.mnc001.mcc001.3gppnetwork.org>;tag=4116302762
To: <sip:bob@ims.mnc001.mcc001.3gppnetwork.org>
Call-ID: 8019DD95-2E72-EC11-9BD3-7D467C83D9C2@10.2.16.36
CSeq: 1 INVITE
Contact: <sip:alice@10.2.16.36:5060;gr=00F54E59-1172-EC11-9AC7-7D467C83D9C2>
Content-Type: application/sdp
Allow: INVITE, ACK, BYE, CANCEL, INFO, MESSAGE, NOTIFY, OPTIONS, REFER, UPDATE, PRACK
Max-Forwards: 69
Supported: 100rel, replaces, from-change, gruu
User-Agent: PhonerLite/2.97
P-Preferred-Identity: <sip:alice@ims.mnc001.mcc001.3gppnetwork.org>
Content-Length: 340
We have normal pointer to parsed object but object itself contains garbage. This is why no parsing is performed and this check passes.
(gdb) p req->contact.parsed
$45 = (void *) 0x7f0b2a69b778
(gdb) p *(contact_body_t*)req->contact.parsed
$46 = {
star = 3 '\003', <---- this
contacts = 0x38 <---- and this
}
If we take next header than the parsed pointer will contain even stranger things
(gdb) p *req->contact.next
$49 = {
type = HDR_CONTENTTYPE_T,
name = {
s = 0x7f0b238ab6c3 "Content-Type: application/sdp\r\nAllow: INVITE, ACK, BYE, CANCEL, INFO, MESSAGE, NOTIFY, OPTIONS, REFER, UPDATE, PRACK\r\nMax-Forwards: 69\r\nSupported: 100rel, replaces, from-change, gruu\r\nUser-Agent: Phon"...,
len = 12
},
body = {
s = 0x7f0b238ab6d1 "application/sdp\r\nAllow: INVITE, ACK, BYE, CANCEL, INFO, MESSAGE, NOTIFY, OPTIONS, REFER, UPDATE, PRACK\r\nMax-Forwards: 69\r\nSupported: 100rel, replaces, from-change, gruu\r\nUser-Agent: PhonerLite/2.97\r\nP"...,
len = 15
},
len = 31,
parsed = 0x30003, <------- this
next = 0x7f0b238ac088
}
I am not much into this code and unfortunately I am unable to find where this values are set. Are messages reused or created from scratch each time? The m variable (reply message) that passed into this method seems to be ok by the way.
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