/* is the ACK (p_msg) in p_msg dialog-wise equal to the INVITE (t_msg)
* except to-tags? */
static inline int partial_dlg_matching(struct sip_msg *t_msg, struct sip_msg *p_msg)
{
struct to_body *inv_from;
if (!EQ_LEN(callid)) return 0;
if (get_cseq(t_msg)->number.len!=get_cseq(p_msg)->number.len)
return 0;
inv_from=get_from(t_msg);
if (!inv_from) {
LOG(L_ERR, "ERROR: partial_dlg_matching: INV/From not parsed\n");
return 0;
}
if (inv_from->tag_value.len!=get_from(p_msg)->tag_value.len)
return 0;
if (!EQ_STR(callid))
return 0;
if (memcmp(get_cseq(t_msg)->number.s, get_cseq(p_msg)->number.s,
get_cseq(p_msg)->number.len)!=0)
return 0;
if (memcmp(inv_from->tag_value.s, get_from(p_msg)->tag_value.s,
get_from(p_msg)->tag_value.len)!=0)
return 0;
return 1;
}
/* function lookups transaction being canceled by CANCEL in p_msg;
* it returns:
* 0 - transaction wasn't found
* T - transaction found
*/
struct cell* t_lookupOriginalT( struct sip_msg* p_msg )
{
struct cell *p_cell;
unsigned int hash_index;
struct sip_msg *t_msg;
struct via_param *branch;
int foo;
int ret;
/* start searching in the table */
if (!(p_msg->msg_flags & FL_HASH_INDEX)){
/* parse all*/
if (check_transaction_quadruple(p_msg)==0)
{
LOG(L_ERR, "ERROR: TM module: t_lookupOriginalT:"
" too few headers\n");
/* stop processing */
return 0;
}
p_msg->hash_index=hash( p_msg->callid->body , get_cseq(p_msg)->number);
p_msg->msg_flags|=FL_HASH_INDEX;
}
hash_index = p_msg->hash_index;
DBG("DEBUG: t_lookupOriginalT: searching on hash entry %d\n",hash_index );
/* first of all, look if there is RFC3261 magic cookie in branch; if
* so, we can do very quick matching and skip the old-RFC bizzar
* comparison of many header fields
*/
if (!p_msg->via1) {
LOG(L_ERR, "ERROR: t_lookupOriginalT: no via\n");
return 0;
}
branch=p_msg->via1->branch;
if (branch && branch->value.s && branch->value.len>MCOOKIE_LEN
&& memcmp(branch->value.s,MCOOKIE,MCOOKIE_LEN)==0) {
/* huhuhu! the cookie is there -- let's proceed fast */
LOCK_HASH(hash_index);
ret=matching_3261(p_msg, &p_cell,
/* we are seeking the original transaction --
* skip CANCEL transactions during search
*/
METHOD_CANCEL, &foo);
if (ret==1) goto found; else goto notfound;
}
/* no cookies --proceed to old-fashioned pre-3261 t-matching */
LOCK_HASH(hash_index);
/* all the transactions from the entry are compared */
for (p_cell=get_tm_table()->entrys[hash_index].first_cell;
p_cell; p_cell = p_cell->next_cell )
{
t_msg = p_cell->uas.request;
if (!t_msg) continue; /* skip UAC transactions */
/* we don't cancel CANCELs ;-) */
if (t_msg->REQ_METHOD==METHOD_CANCEL)
continue;
/* check lengths now */
if (!EQ_LEN(callid))
continue;
if (get_cseq(t_msg)->number.len!=get_cseq(p_msg)->number.len)
continue;
if (!EQ_LEN(from))
continue;
#ifdef CANCEL_TAG
if (!EQ_LEN(to))
continue;
#else
/* relaxed matching -- we don't care about to-tags anymore,
* many broken UACs screw them up and ignoring them does not
* actually hurt
*/
if (get_to(t_msg)->uri.len!=get_to(p_msg)->uri.len)
continue;
#endif
if (ruri_matching && !EQ_REQ_URI_LEN)
continue;
if (via1_matching && !EQ_VIA_LEN(via1))
continue;
/* check the content now */
if (!EQ_STR(callid))
continue;
if (memcmp(get_cseq(t_msg)->number.s,
get_cseq(p_msg)->number.s,get_cseq(p_msg)->number.len)!=0)
continue;
if (!EQ_STR(from))
continue;
#ifdef CANCEL_TAG
if (!EQ_STR(to))
continue;
#else
if (memcmp(get_to(t_msg)->uri.s, get_to(p_msg)->uri.s,
get_to(t_msg)->uri.len)!=0)
continue;
#endif
if (ruri_matching && !EQ_REQ_URI_STR)
continue;
if (via1_matching && !EQ_VIA_STR(via1))
continue;
/* found */
goto found;
}
notfound:
/* no transaction found */
DBG("DEBUG: t_lookupOriginalT: no CANCEL matching found! \n" );
UNLOCK_HASH(hash_index);
DBG("DEBUG: t_lookupOriginalT completed\n");
return 0;
found:
DBG("DEBUG: t_lookupOriginalT: canceled transaction"
" found (%p)! \n",p_cell );
REF_UNSAFE( p_cell );
UNLOCK_HASH(hash_index);
DBG("DEBUG: t_lookupOriginalT completed\n");
return p_cell;
}
int t_lookup_request( struct sip_msg* p_msg , int leave_new_locked,
int* cancel)
{
struct cell *p_cell;
unsigned int isACK;
struct sip_msg *t_msg;
int ret;
struct via_param *branch;
int match_status;
struct cell *e2e_ack_trans;
/* parse all*/
if (check_transaction_quadruple(p_msg)==0)
{
LOG(L_ERR, "ERROR: TM module: t_lookup_request: too few headers\n");
set_t(0);
/* stop processing */
return 0;
}
/* start searching into the table */
if (!(p_msg->msg_flags & FL_HASH_INDEX)){
p_msg->hash_index=hash( p_msg->callid->body , get_cseq(p_msg)->number);
p_msg->msg_flags|=FL_HASH_INDEX;
}
isACK = p_msg->REQ_METHOD==METHOD_ACK;
DBG("t_lookup_request: start searching: hash=%d, isACK=%d\n",
p_msg->hash_index,isACK);
/* assume not found */
ret=-1;
e2e_ack_trans = 0;
/* first of all, look if there is RFC3261 magic cookie in branch; if
* so, we can do very quick matching and skip the old-RFC bizzar
* comparison of many header fields
*/
if (!p_msg->via1) {
LOG(L_ERR, "ERROR: t_lookup_request: no via\n");
set_t(0);
return 0;
}
branch=p_msg->via1->branch;
if (branch && branch->value.s && branch->value.len>MCOOKIE_LEN
&& memcmp(branch->value.s,MCOOKIE,MCOOKIE_LEN)==0) {
/* huhuhu! the cookie is there -- let's proceed fast */
LOCK_HASH(p_msg->hash_index);
match_status=matching_3261(p_msg,&p_cell,
/* skip transactions with different method; otherwise CANCEL
* would match the previous INVITE trans. */
isACK ? ~METHOD_INVITE: ~p_msg->REQ_METHOD,
cancel);
switch(match_status) {
case 0: goto notfound; /* no match */
case 1: goto found; /* match */
case 2: goto e2e_ack; /* e2e proxy ACK */
}
}
/* ok -- it's ugly old-fashioned transaction matching -- it is
* a bit simplified to be fast -- we don't do all the comparisons
* of parsed uri, which was simply too bloated */
DBG("DEBUG: proceeding to pre-RFC3261 transaction matching\n");
*cancel=0;
/* lock the whole entry*/
LOCK_HASH(p_msg->hash_index);
/* all the transactions from the entry are compared */
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; /* skip UAC transactions */
if (!isACK) {
/* for non-ACKs we want same method matching, we
* make an exception for pre-exisiting CANCELs because we
* want to set *cancel */
if ((t_msg->REQ_METHOD!=p_msg->REQ_METHOD) &&
(t_msg->REQ_METHOD!=METHOD_CANCEL))
continue;
/* compare lengths first */
if (!EQ_LEN(callid)) continue;
/* CSeq only the number without method ! */
if (get_cseq(t_msg)->number.len!=get_cseq(p_msg)->number.len)
continue;
if (!EQ_LEN(from)) continue;
if (!EQ_LEN(to)) continue;
if (ruri_matching && !EQ_REQ_URI_LEN) continue;
if (via1_matching && !EQ_VIA_LEN(via1)) continue;
/* length ok -- move on */
if (!EQ_STR(callid)) continue;
if (memcmp(get_cseq(t_msg)->number.s, get_cseq(p_msg)->number.s,
get_cseq(p_msg)->number.len)!=0) continue;
if (!EQ_STR(from)) continue;
if (!EQ_STR(to)) continue;
if (ruri_matching && !EQ_REQ_URI_STR) continue;
if (via1_matching && !EQ_VIA_STR(via1)) continue;
if ((t_msg->REQ_METHOD==METHOD_CANCEL) &&
(p_msg->REQ_METHOD!=METHOD_CANCEL)){
/* we've matched an existing CANCEL */
*cancel=1;
continue;
}
/* request matched ! */
DBG("DEBUG: non-ACK matched\n");
goto found;
} else { /* it's an ACK request*/
/* ACK's relate only to INVITEs */
if (t_msg->REQ_METHOD!=METHOD_INVITE) continue;
/* From|To URI , CallID, CSeq # must be always there */
/* compare lengths now */
if (!EQ_LEN(callid)) continue;
/* CSeq only the number without method ! */
if (get_cseq(t_msg)->number.len!=get_cseq(p_msg)->number.len)
continue;
if (! EQ_LEN(from)) continue;
/* To only the uri -- to many UACs screw up tags */
if (get_to(t_msg)->uri.len!=get_to(p_msg)->uri.len)
continue;
if (!EQ_STR(callid)) continue;
if (memcmp(get_cseq(t_msg)->number.s, get_cseq(p_msg)->number.s,
get_cseq(p_msg)->number.len)!=0) continue;
if (!EQ_STR(from)) continue;
if (memcmp(get_to(t_msg)->uri.s, get_to(p_msg)->uri.s,
get_to(t_msg)->uri.len)!=0) continue;
/* it is e2e ACK/200 */
if (p_cell->uas.status<300 && e2e_ack_trans==0) {
/* all criteria for proxied ACK are ok */
if (p_cell->relayed_reply_branch!=-2) {
e2e_ack_trans=p_cell;
continue;
}
/* it's a local UAS transaction */
if (dlg_matching(p_cell, p_msg))
goto found;
continue;
}
/* it is not an e2e ACK/200 -- perhaps it is
* local negative case; in which case we will want
* more elements to match: r-uri and via; allow
* mismatching r-uri as an config option for broken
* UACs */
if (ruri_matching && !EQ_REQ_URI_LEN ) continue;
if (via1_matching && !EQ_VIA_LEN(via1)) continue;
if (ruri_matching && !EQ_REQ_URI_STR) continue;
if (via1_matching && !EQ_VIA_STR(via1)) continue;
/* wow -- we survived all the check! we matched! */
DBG("DEBUG: non-2xx ACK matched\n");
goto found;
} /* ACK */
} /* synonym loop */
notfound:
if (e2e_ack_trans) {
p_cell=e2e_ack_trans;
goto e2e_ack;
}
/* no transaction found */
set_t(0);
if (!leave_new_locked) {
UNLOCK_HASH(p_msg->hash_index);
}
DBG("DEBUG: t_lookup_request: no transaction found\n");
return -1;
e2e_ack:
t_ack=p_cell; /* e2e proxied ACK */
set_t(0);
if (!leave_new_locked) {
UNLOCK_HASH(p_msg->hash_index);
}
DBG("DEBUG: t_lookup_request: e2e proxy ACK found\n");
return -2;
found:
set_t(p_cell);
REF_UNSAFE( T );
set_kr(REQ_EXIST);
UNLOCK_HASH( p_msg->hash_index );
DBG("DEBUG: t_lookup_request: transaction found (T=%p)\n",T);
return 1;
}
/* function lookups transaction being canceled by CANCEL in p_msg;
* it returns:
* 0 - transaction wasn't found
* T - transaction found
*/
struct cell* t_lookupOriginalT( struct sip_msg* p_msg )
{
struct cell *p_cell;
unsigned int hash_index;
struct sip_msg *t_msg;
struct via_param *branch;
int ret;
/* already looked for it? */
if (cancelled_T!=T_UNDEFINED)
return cancelled_T;
/* start searching in the table */
hash_index = p_msg->hash_index;
LM_DBG("searching on hash entry %d\n",hash_index );
/* first of all, look if there is RFC3261 magic cookie in branch; if
* so, we can do very quick matching and skip the old-RFC bizzar
* comparison of many header fields
*/
if (!p_msg->via1) {
LM_ERR("no via\n");
cancelled_T = NULL;
return 0;
}
branch=p_msg->via1->branch;
if (branch && branch->value.s && branch->value.len>MCOOKIE_LEN
&& memcmp(branch->value.s,MCOOKIE,MCOOKIE_LEN)==0) {
/* huhuhu! the cookie is there -- let's proceed fast */
LOCK_HASH(hash_index);
ret=matching_3261(p_msg, &p_cell,
/* we are seeking the original transaction --
* skip CANCEL transactions during search
*/
METHOD_CANCEL);
if (ret==1) goto found; else goto notfound;
}
/* no cookies --proceed to old-fashioned pre-3261 t-matching */
LOCK_HASH(hash_index);
/* all the transactions from the entry are compared */
for (p_cell=get_tm_table()->entrys[hash_index].first_cell;
p_cell; p_cell = p_cell->next_cell )
{
t_msg = p_cell->uas.request;
if (!t_msg) continue; /* skip UAC transactions */
/* we don't cancel CANCELs ;-) */
if (t_msg->REQ_METHOD==METHOD_CANCEL)
continue;
/* check lengths now */
if (!EQ_LEN(callid))
continue;
if (get_cseq(t_msg)->number.len!=get_cseq(p_msg)->number.len)
continue;
if (!EQ_LEN(from))
continue;
#ifdef CANCEL_TAG
if (!EQ_LEN(to))
continue;
#else
/* relaxed matching -- we don't care about to-tags anymore,
* many broken UACs screw them up and ignoring them does not
* actually hurt
*/
if (get_to(t_msg)->uri.len!=get_to(p_msg)->uri.len)
continue;
#endif
if (ruri_matching && !EQ_REQ_URI_LEN)
continue;
if (via1_matching && !EQ_VIA_LEN(via1))
continue;
/* check the content now */
if (!EQ_STR(callid))
continue;
if (memcmp(get_cseq(t_msg)->number.s,
get_cseq(p_msg)->number.s,get_cseq(p_msg)->number.len)!=0)
continue;
if (!EQ_STR(from))
continue;
#ifdef CANCEL_TAG
if (!EQ_STR(to))
continue;
#else
if (memcmp(get_to(t_msg)->uri.s, get_to(p_msg)->uri.s,
get_to(t_msg)->uri.len)!=0)
continue;
#endif
if (ruri_matching && !EQ_REQ_URI_STR)
continue;
if (via1_matching && !EQ_VIA_STR(via1))
continue;
/* found */
goto found;
}
notfound:
/* no transaction found */
LM_DBG("no CANCEL matching found! \n" );
UNLOCK_HASH(hash_index);
cancelled_T = NULL;
LM_DBG("t_lookupOriginalT completed\n");
return 0;
found:
LM_DBG("canceled transaction found (%p)! \n",p_cell );
cancelled_T = p_cell;
REF_UNSAFE( p_cell );
UNLOCK_HASH(hash_index);
/* run callback */
run_trans_callbacks( TMCB_TRANS_CANCELLED, cancelled_T, p_msg, 0,0);
LM_DBG("t_lookupOriginalT completed\n");
return p_cell;
}
int t_lookup_request( struct sip_msg* p_msg , int leave_new_locked )
{
struct cell *p_cell;
unsigned int isACK;
struct sip_msg *t_msg;
struct via_param *branch;
int match_status;
isACK = p_msg->REQ_METHOD==METHOD_ACK;
if (isACK) {
if (e2eack_T==NULL)
return -1;
if (e2eack_T!=T_UNDEFINED)
return -2;
}
/* parse all*/
if (check_transaction_quadruple(p_msg)==0) {
LM_ERR("too few headers\n");
set_t(0);
/* stop processing */
return 0;
}
/* start searching into the table */
if (!p_msg->hash_index)
p_msg->hash_index=tm_hash( p_msg->callid->body ,
get_cseq(p_msg)->number ) ;
LM_DBG("start searching: hash=%d, isACK=%d\n",
p_msg->hash_index,isACK);
/* first of all, look if there is RFC3261 magic cookie in branch; if
* so, we can do very quick matching and skip the old-RFC bizzar
* comparison of many header fields
*/
if (!p_msg->via1) {
LM_ERR("no via\n");
set_t(0);
return 0;
}
branch=p_msg->via1->branch;
if (branch && branch->value.s && branch->value.len>MCOOKIE_LEN
&& memcmp(branch->value.s,MCOOKIE,MCOOKIE_LEN)==0) {
/* huhuhu! the cookie is there -- let's proceed fast */
LOCK_HASH(p_msg->hash_index);
match_status=matching_3261(p_msg,&p_cell,
/* skip transactions with different method; otherwise CANCEL
* would match the previous INVITE trans. */
isACK ? ~METHOD_INVITE: ~p_msg->REQ_METHOD);
switch(match_status) {
case 0: goto notfound; /* no match */
case 1: goto found; /* match */
case 2: goto e2e_ack; /* e2e proxy ACK */
}
}
/* ok -- it's ugly old-fashioned transaction matching -- it is
* a bit simplified to be fast -- we don't do all the comparisons
* of parsed uri, which was simply too bloated */
LM_DBG("proceeding to pre-RFC3261 transaction matching\n");
/* lock the whole entry*/
LOCK_HASH(p_msg->hash_index);
/* all the transactions from the entry are compared */
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; /* skip UAC transactions */
if (!isACK) {
/* compare lengths first */
if (!EQ_LEN(callid)) continue;
if (!EQ_LEN(cseq)) continue;
if (!EQ_LEN(from)) continue;
if (!EQ_LEN(to)) continue;
if (ruri_matching && !EQ_REQ_URI_LEN) continue;
if (via1_matching && !EQ_VIA_LEN(via1)) continue;
/* length ok -- move on */
if (!EQ_STR(callid)) continue;
if (!EQ_STR(cseq)) continue;
if (!EQ_STR(from)) continue;
if (!EQ_STR(to)) continue;
if (ruri_matching && !EQ_REQ_URI_STR) continue;
if (via1_matching && !EQ_VIA_STR(via1)) continue;
/* request matched ! */
LM_DBG("non-ACK matched\n");
goto found;
} else { /* it's an ACK request*/
/* ACK's relate only to INVITEs - and we look only for 2 types of
* INVITEs : (a) negative INVITEs or (b) pozitive UAS INVITEs */
if ( t_msg->REQ_METHOD!=METHOD_INVITE || !(p_cell->uas.status>=300
|| (p_cell->nr_of_outgoings==0 && p_cell->uas.status>=200)) )
continue;
/* From|To URI , CallID, CSeq # must be always there */
/* compare lengths now */
if (!EQ_LEN(callid)) continue;
/* CSeq only the number without method ! */
if (get_cseq(t_msg)->number.len!=get_cseq(p_msg)->number.len)
continue;
if (! EQ_LEN(from)) continue;
/* To only the uri -- to many UACs screw up tags */
if (get_to(t_msg)->uri.len!=get_to(p_msg)->uri.len)
continue;
if (!EQ_STR(callid)) continue;
if (memcmp(get_cseq(t_msg)->number.s, get_cseq(p_msg)->number.s,
get_cseq(p_msg)->number.len)!=0) continue;
if (!EQ_STR(from)) continue;
if (memcmp(get_to(t_msg)->uri.s, get_to(p_msg)->uri.s,
get_to(t_msg)->uri.len)!=0) continue;
if (p_cell->uas.status<300) {
/* it's a 2xx local UAS transaction */
if (dlg_matching(p_cell, p_msg))
goto e2e_ack;
continue;
}
/* it is not an e2e ACK/200 -- perhaps it is
* local negative case; in which case we will want
* more elements to match: r-uri and via; allow
* mismatching r-uri as an config option for broken
* UACs */
if (ruri_matching && !EQ_REQ_URI_LEN ) continue;
if (via1_matching && !EQ_VIA_LEN(via1)) continue;
if (ruri_matching && !EQ_REQ_URI_STR) continue;
if (via1_matching && !EQ_VIA_STR(via1)) continue;
/* wow -- we survived all the check! we matched! */
LM_DBG("non-2xx ACK matched\n");
goto found;
} /* ACK */
} /* synonym loop */
notfound:
/* no transaction found */
set_t(0);
e2eack_T = NULL;
if (!leave_new_locked || isACK) {
UNLOCK_HASH(p_msg->hash_index);
}
LM_DBG("no transaction found\n");
return -1;
e2e_ack:
REF_UNSAFE( p_cell );
UNLOCK_HASH(p_msg->hash_index);
e2eack_T = p_cell;
set_t(0);
LM_DBG("e2e proxy ACK found\n");
return -2;
found:
set_t(p_cell);
REF_UNSAFE( T );
set_kr(REQ_EXIST);
UNLOCK_HASH( p_msg->hash_index );
LM_DBG("transaction found (T=%p)\n",T);
if (has_tran_tmcbs( T, TMCB_MSG_MATCHED_IN) )
run_trans_callbacks( TMCB_MSG_MATCHED_IN, T, p_msg, 0,0);
return 1;
}
