/* Determine current transaction
*
* Found Not Found Error (e.g. parsing)
* Return Value 1 0 -1
* T ptr 0 T_UNDEFINED
*/
int t_check( struct sip_msg* p_msg , int *param_branch )
{
int local_branch;
/* is T still up-to-date ? */
LM_DBG("start=%p\n", T);
if ( T==T_UNDEFINED )
{
/* transaction lookup */
if ( p_msg->first_line.type==SIP_REQUEST ) {
/* force parsing all the needed headers*/
if (parse_headers(p_msg, HDR_EOH_F, 0 )==-1) {
LM_ERR("parsing error\n");
return -1;
}
/* in case, we act as UAS for INVITE and reply with 200,
* we will need to run dialog-matching for subsequent
* ACK, for which we need From-tag; We also need from-tag
* in case people want to have proxied e2e ACKs accounted
*/
if (p_msg->REQ_METHOD==METHOD_INVITE
&& parse_from_header(p_msg)<0) {
LM_ERR("from parsing failed\n");
return -1;
}
t_lookup_request( p_msg , 0 /* unlock before returning */ );
} else {
/* we need Via for branch and Cseq method to distinguish
replies with the same branch/cseqNr (CANCEL)
*/
if ( parse_headers(p_msg, HDR_VIA1_F|HDR_CSEQ_F, 0 )==-1
|| !p_msg->via1 || !p_msg->cseq ) {
LM_ERR("reply cannot be parsed\n");
return -1;
}
/* if that is an INVITE, we will also need to-tag
for later ACK matching */
if ( get_cseq(p_msg)->method_id==METHOD_INVITE ) {
if (parse_headers(p_msg, HDR_TO_F, 0)==-1 || !p_msg->to) {
LM_ERR("INVITE reply cannot be parsed\n");
return -1;
}
}
/* first check if the transaction is addressed to us */
if (!tm_reply_replicate(p_msg))
t_reply_matching(p_msg ,
param_branch!=0?param_branch:&local_branch);
else
T = NULL; /* reply replicated
should have never got here */
}
#ifdef EXTRA_DEBUG
if ( T && T!=T_UNDEFINED && T->damocles) {
LM_ERR("transaction %p scheduled for deletion "
"and called from t_check\n", T);
abort();
}
#endif
LM_DBG("end=%p\n",T);
} else {
if (T)
LM_DBG("transaction already found!\n");
else
LM_DBG("transaction previously sought and not found\n");
}
return T ? (T==T_UNDEFINED ? -1 : 1 ) : 0;
}
/* Determine current transaction
*
* Found Not Found Error (e.g. parsing)
* Return Value 1 0 -1
* T ptr 0 T_UNDEFINED
*/
int t_check( struct sip_msg* p_msg , int *param_branch )
{
int local_branch;
int canceled;
/* is T still up-to-date ? */
DBG("DEBUG: t_check: msg id=%d global id=%d T start=%p\n",
p_msg->id,global_msg_id,T);
if ( p_msg->id != global_msg_id || T==T_UNDEFINED )
{
global_msg_id = p_msg->id;
T = T_UNDEFINED;
/* transaction lookup */
if ( p_msg->first_line.type==SIP_REQUEST ) {
/* force parsing all the needed headers*/
if (parse_headers(p_msg, HDR_EOH_F, 0 )==-1) {
LOG(L_ERR, "ERROR: t_check: parsing error\n");
return -1;
}
/* in case, we act as UAS for INVITE and reply with 200,
* we will need to run dialog-matching for subsequent
* ACK, for which we need From-tag; We also need from-tag
* in case people want to have proxied e2e ACKs accounted
*/
if (p_msg->REQ_METHOD==METHOD_INVITE
&& parse_from_header(p_msg)==-1) {
LOG(L_ERR, "ERROR: t_check: from parsing failed\n");
return -1;
}
t_lookup_request( p_msg , 0 /* unlock before returning */,
&canceled);
} else {
/* we need Via for branch and Cseq method to distinguish
replies with the same branch/cseqNr (CANCEL)
and we need all the WWW/Proxy Authenticate headers for
401 & 407 replies
*/
if (tm_aggregate_auth &&
(p_msg->REPLY_STATUS==401 || p_msg->REPLY_STATUS==407)){
if (parse_headers(p_msg, HDR_EOH_F,0)==-1){
LOG(L_WARN, "WARNING: the reply cannot be "
"completely parsed\n");
/* try to continue, via1 & cseq are checked below */
}
}else if ( parse_headers(p_msg, HDR_VIA1_F|HDR_CSEQ_F, 0 )==-1) {
LOG(L_ERR, "ERROR: reply cannot be parsed\n");
return -1;
}
if ((p_msg->via1==0) || (p_msg->cseq==0)){
LOG(L_ERR, "ERROR: reply doesn't have a via or cseq header\n");
return -1;
}
/* if that is an INVITE, we will also need to-tag
for later ACK matching
*/
if ( get_cseq(p_msg)->method.len==INVITE_LEN
&& memcmp( get_cseq(p_msg)->method.s, INVITE, INVITE_LEN )==0 ) {
if (parse_headers(p_msg, HDR_TO_F, 0)==-1
|| !p_msg->to) {
LOG(L_ERR, "ERROR: INVITE reply cannot be parsed\n");
return -1;
}
}
t_reply_matching( p_msg ,
param_branch!=0?param_branch:&local_branch );
}
#ifdef EXTRA_DEBUG
if ( T && T!=T_UNDEFINED && T->flags & (T_IN_AGONY)) {
LOG( L_ERR, "ERROR: transaction %p scheduled for deletion "
"and called from t_check (flags=%x)\n", T, T->flags);
abort();
}
#endif
DBG("DEBUG: t_check: msg id=%d global id=%d T end=%p\n",
p_msg->id,global_msg_id,T);
} else {
if (T)
DBG("DEBUG: t_check: T already found!\n");
else
DBG("DEBUG: t_check: T previously sought and not found\n");
}
return T ? (T==T_UNDEFINED ? -1 : 1 ) : 0;
}
/* Determine current transaction
*
* Found Not Found Error (e.g. parsing)
* Return Value 1 0 -1
* T ptr 0 T_UNDEFINED
*/
int t_check( struct sip_msg* p_msg , int *param_branch )
{
int local_branch;
/* is T still up-to-date ? */
DBG("DEBUG: t_check: msg id=%d global id=%d T start=%p\n",
p_msg->id,global_msg_id,T);
if ( p_msg->id != global_msg_id || T==T_UNDEFINED )
{
global_msg_id = p_msg->id;
T = T_UNDEFINED;
/* transaction lookup */
if ( p_msg->first_line.type==SIP_REQUEST ) {
/* force parsing all the needed headers*/
if (parse_headers(p_msg, HDR_EOH, 0 )==-1) {
LOG(L_ERR, "ERROR: t_check: parsing error\n");
return -1;
}
/* in case, we act as UAS for INVITE and reply with 200,
* we will need to run dialog-matching for subsequent
* ACK, for which we need From-tag; We also need from-tag
* in case people want to have proxied e2e ACKs accounted
*/
if (p_msg->REQ_METHOD==METHOD_INVITE
&& parse_from_header(p_msg)==-1) {
LOG(L_ERR, "ERROR: t_check: from parsing failed\n");
return -1;
}
t_lookup_request( p_msg , 0 /* unlock before returning */ );
} else {
/* we need Via for branch and Cseq method to distinguish
replies with the same branch/cseqNr (CANCEL)
*/
if ( parse_headers(p_msg, HDR_VIA1|HDR_CSEQ, 0 )==-1
|| !p_msg->via1 || !p_msg->cseq ) {
LOG(L_ERR, "ERROR: reply cannot be parsed\n");
return -1;
}
/* if that is an INVITE, we will also need to-tag
for later ACK matching
*/
if ( get_cseq(p_msg)->method.len==INVITE_LEN
&& memcmp( get_cseq(p_msg)->method.s, INVITE, INVITE_LEN )==0 ) {
if (parse_headers(p_msg, HDR_TO, 0)==-1
|| !p_msg->to) {
LOG(L_ERR, "ERROR: INVITE reply cannot be parsed\n");
return -1;
}
}
t_reply_matching( p_msg ,
param_branch!=0?param_branch:&local_branch );
}
#ifdef EXTRA_DEBUG
if ( T && T!=T_UNDEFINED && T->damocles) {
LOG( L_ERR, "ERROR: transaction %p scheduled for deletion "
"and called from t_check\n", T);
abort();
}
#endif
DBG("DEBUG: t_check: msg id=%d global id=%d T end=%p\n",
p_msg->id,global_msg_id,T);
} else {
if (T)
DBG("DEBUG: t_check: T alredy found!\n");
else
DBG("DEBUG: t_check: T previously sought and not found\n");
}
return T ? (T==T_UNDEFINED ? -1 : 1 ) : 0;
}
