static int matching_3261( struct sip_msg *p_msg, struct cell **trans,
enum request_method skip_method)
{
struct cell *p_cell;
struct sip_msg *t_msg;
struct via_body *via1;
int is_ack;
int dlg_parsed;
int ret;
via1=p_msg->via1;
is_ack=p_msg->REQ_METHOD==METHOD_ACK;
dlg_parsed=0;
/* update parsed tid */
via1->tid.s=via1->branch->value.s+MCOOKIE_LEN;
via1->tid.len=via1->branch->value.len-MCOOKIE_LEN;
for ( p_cell = get_tm_table()->entrys[p_msg->hash_index].first_cell;
p_cell; p_cell = p_cell->next_cell )
{
t_msg=p_cell->uas.request;
if (!t_msg) continue; /* don't try matching UAC transactions */
if (skip_method & t_msg->REQ_METHOD) continue;
/* dialog matching needs to be applied for ACK/200s */
if (is_ack && p_cell->uas.status<300) {
/* make sure we have parsed all things we need for dialog
* matching */
if (!dlg_parsed) {
dlg_parsed=1;
if (!parse_dlg(p_msg)) {
LOG(L_ERR, "ERROR: tid_matching: dlg parsing failed\n");
return 0;
}
}
ret=ack_matching(p_cell /* t w/invite */, p_msg /* ack */);
if (ret>0) {
*trans=p_cell;
return ret; /* 2: e2e proxied ACK, 1 e2e UAS ACK */
}
/* this ACK is neither local "negative" one, nor a proxied
* end-2-end one, nor an end-2-end one for a UAS transaction
* -- we failed to match */
continue;
}
/* now real tid matching occurs for negative ACKs and any
* other requests */
if (!via_matching(t_msg->via1 /* inv via */, via1 /* ack */ ))
continue;
/* all matched -- we found the transaction ! */
DBG("DEBUG: RFC3261 transaction matched, tid=%.*s\n",
via1->tid.len, via1->tid.s);
*trans=p_cell;
return 1;
}
/* :-( ... we didn't find any */
DBG("DEBUG: RFC3261 transaction matching failed\n");
return 0;
}
static int matching_3261( struct sip_msg *p_msg, struct cell **trans,
enum request_method skip_method, int* cancel)
{
struct cell *p_cell;
struct sip_msg *t_msg;
struct via_body *via1;
int is_ack;
int dlg_parsed;
int ret = 0;
struct cell *e2e_ack_trans;
*cancel=0;
e2e_ack_trans=0;
via1=p_msg->via1;
is_ack=p_msg->REQ_METHOD==METHOD_ACK;
dlg_parsed=0;
/* update parsed tid */
via1->tid.s=via1->branch->value.s+MCOOKIE_LEN;
via1->tid.len=via1->branch->value.len-MCOOKIE_LEN;
for ( p_cell = get_tm_table()->entrys[p_msg->hash_index].first_cell;
p_cell; p_cell = p_cell->next_cell )
{
t_msg=p_cell->uas.request;
if (!t_msg) continue; /* don't try matching UAC transactions */
/* we want to set *cancel for transaction for which there is
* already a canceled transaction (e.g. re-ordered INV-CANCEL, or
* INV blocked in dns lookup); we don't care about ACKs */
if ((is_ack || (t_msg->REQ_METHOD!=METHOD_CANCEL)) &&
(skip_method & t_msg->REQ_METHOD))
continue;
/* here we do an exercise which will be removed from future code
versions: we try to match end-2-end ACKs if they appear at our
server. This allows some applications bound to TM via callbacks
to correlate the e2e ACKs with transaction context, e.g., for
purpose of accounting. We think it is a bad place here, among
other things because it is not reliable. If a transaction loops
via SER the ACK can't be matched to proper INVITE transaction
(it is a separate transactino with its own branch ID) and it
matches all transaction instances in the loop dialog-wise.
Eventually, regardless to which transaction in the loop the
ACK belongs, only the first one will match.
*/
/* dialog matching needs to be applied for ACK/200s */
if (is_ack && p_cell->uas.status<300 && e2e_ack_trans==0) {
/* make sure we have parsed all things we need for dialog
* matching */
if (!dlg_parsed) {
dlg_parsed=1;
if (!parse_dlg(p_msg)) {
LOG(L_ERR, "ERROR: matching_3261: dlg parsing failed\n");
return 0;
}
}
ret=ack_matching(p_cell /* t w/invite */, p_msg /* ack */);
if (ret>0) {
e2e_ack_trans=p_cell;
break;
}
/* this ACK is neither local "negative" one, nor a proxied
* end-2-end one, nor an end-2-end one for a UAS transaction
* -- we failed to match */
continue;
}
/* now real tid matching occurs for negative ACKs and any
* other requests */
if (!via_matching(t_msg->via1 /* inv via */, via1 /* ack */ ))
continue;
if (t_msg->REQ_METHOD==METHOD_CANCEL){
if ((p_msg->REQ_METHOD!=METHOD_CANCEL) && !is_ack){
/* found an existing cancel for the searched transaction */
*cancel=1;
}
if (skip_method & t_msg->REQ_METHOD) continue;
}
/* all matched -- we found the transaction ! */
DBG("DEBUG: RFC3261 transaction matched, tid=%.*s\n",
via1->tid.len, via1->tid.s);
*trans=p_cell;
return 1;
}
/* :-( ... we didn't find any */
/* just check if it we found an e2e ACK previously */
if (e2e_ack_trans) {
*trans=e2e_ack_trans;
return ret;
}
DBG("DEBUG: RFC3261 transaction matching failed\n");
return 0;
}
