25 Mar
2005
25 Mar
'05
8:53 p.m.
Jan Janak writes:
This cannot be done in the current version bucause
there is no way of
retrieving the information from contacts when a 3xx comes. Juha Heinanen
<jh(a)tutpro.com> had it working, he might point you in the right
direction.
yes, i implemented a function called move that turned 302 to invite, but
that code relied on a patch to tm module that gave me access to contact
header of reply in reply route.
i found the function and it is below. someone who needs this
functionality has to check if same kind of access to the contact header
of the reply is still possible or if the access method is now different
and modify the code accordingly.
also, all contacts would need to be taken from 302, not just the first.
contact_re was compiled during module initialization:
regcomp(&contact_re, "^Contact:(.*)$", REG_EXTENDED|REG_NEWLINE);
needless to say, i'm not proud of this code, but it gives an idea on how
it can be done.
-- juha
/*
* Appends a new branch to request using the first Contact URI of the (302)
* reply (if any) as the Request URI. Returns 1 if appending succeeded and -1
* if it failed.
*/
int move(struct sip_msg* _m, char* _s1, char* _s2)
{
struct sip_msg* reply;
regmatch_t pmatch[2];
struct hdr_field hf;
contact_t* first;
reply = _m->final_reply;
if (!reply) {
LOG(L_ERR, "move(): No reply found\n");
return -1;
}
LOG(L_ERR, "move(): unparsed part of reply: %s\n", reply->unparsed);
if ((regexec(&contact_re, reply->unparsed, 2, &(pmatch[0]), 0) != 0) ||
(pmatch[1].rm_so == -1)) {
LOG(L_ERR, "move(): No Contact header found\n");
return -1;
}
hf.type = HDR_CONTACT;
hf.name.len = 0;
hf.body.len = pmatch[1].rm_eo - pmatch[1].rm_so - 1;
hf.body.s = &(reply->unparsed[pmatch[1].rm_so]);
hf.len = hf.body.len + 2;
hf.parsed = NULL;
hf.next = NULL;
LOG(L_ERR, "hf.body: '%.*s'\n", hf.body.len, hf.body.s);
if (parse_contact(&hf) < 0) {
LOG(L_ERR, "move(): Error while parsing Contact\n");
goto failure;
}
if (((contact_body_t*)hf.parsed)->star == 1) {
LOG(L_ERR, "move(): Contact is *\n");
goto failure;
}
first = ((contact_body_t*)hf.parsed)->contacts;
if (first) {
if (append_branch(_m, first->uri.s, first->uri.len) == 1) {
goto success;
} else {
LOG(L_ERR, "move(): Appending branch failed\n");
}
} else {
LOG(L_ERR, "move(): No contacts in Contact header\n");
}
failure:
if (hf.parsed) {
free_contact((contact_body_t**)(&(hf.parsed)));
}
return -1;
success:
free_contact((contact_body_t**)(&(hf.parsed)));
return 1;
}