inline static int w_t_lookup_cancel(struct sip_msg* msg, char* str, char* str2) { struct cell *ret; if (msg->REQ_METHOD==METHOD_CANCEL) { ret = t_lookupOriginalT( msg ); DBG("lookup_original: t_lookupOriginalT returned: %p\n", ret); if (ret != T_NULL_CELL) { /* The cell is reffed by t_lookupOriginalT, but T is not set. So we must unref it before returning. */ UNREF(ret); set_t(T_UNDEFINED); return 1; } set_t(T_UNDEFINED); } else { LOG(L_WARN, "WARNING: script error t_lookup_cancel() called for non-CANCEL request\n"); } return -1; }
inline static int t_check_trans(struct sip_msg* msg) { struct cell *trans; if (msg->REQ_METHOD==METHOD_CANCEL) { /* parse needed hdrs*/ if (check_transaction_quadruple(msg)==0) { LM_ERR("too few headers\n"); return 0; /*drop request!*/ } if (!msg->hash_index) msg->hash_index = tm_hash(msg->callid->body,get_cseq(msg)->number); /* performe lookup */ trans = t_lookupOriginalT( msg ); return trans?1:-1; } else { trans = get_t(); if (trans==NULL) return -1; if (trans!=T_UNDEFINED) return 1; switch ( t_lookup_request( msg , 0) ) { case 1: /* transaction found -> is it local ACK? */ if (msg->REQ_METHOD==METHOD_ACK) return 1; /* .... else -> retransmission */ trans = get_t(); t_retransmit_reply(trans); UNREF(trans); set_t(0); return 0; case -2: /* e2e ACK found */ return 1; default: /* notfound */ return -1; } } }
inline static int t_check_trans(struct sip_msg* msg, char *foo, char *bar) { struct cell *trans; struct cell *bkup; int ret; if (msg->REQ_METHOD==METHOD_CANCEL) { /* parse needed hdrs*/ if (check_transaction_quadruple(msg)==0) { LOG(L_ERR, "ERROR:tm:t_check_trans: too few headers\n"); return 0; /*drop request!*/ } if (!msg->hash_index) msg->hash_index = hash(msg->callid->body,get_cseq(msg)->number); /* performe lookup */ trans = t_lookupOriginalT( msg ); if (trans) { UNREF( trans ); return 1; } else { return -1; } } else { bkup = get_t(); ret = t_lookup_request( msg , 0); if ( (trans=get_t())!=0 ) UNREF(trans); set_t( bkup ); switch (ret) { case 1: /* transaction found */ return 1; case -2: /* e2e ACK found */ return 1; default: /* notfound */ return -1; } } return ret; }
/* function returns: * 1 - forward successful * -1 - error during forward */ int t_forward_nonack( struct cell *t, struct sip_msg* p_msg , struct proxy_l * proxy, int reset_bcounter, int locked) { str reply_reason_487 = str_init("Request Terminated"); str backup_uri; str backup_dst; int branch_ret, lowest_ret; str current_uri; branch_bm_t added_branches; int i, q; struct cell *t_invite; int success_branch; str dst_uri; struct socket_info *bk_sock; unsigned int br_flags, bk_bflags; int idx; str path; str bk_path; /* make -Wall happy */ current_uri.s=0; /* before doing enything, update the t flags from msg */ t->uas.request->flags = p_msg->flags; if (p_msg->REQ_METHOD==METHOD_CANCEL) { t_invite=t_lookupOriginalT( p_msg ); if (t_invite!=T_NULL_CELL) { t_invite->flags |= T_WAS_CANCELLED_FLAG; cancel_invite( p_msg, t, t_invite, locked ); return 1; } } /* do not forward requests which were already cancelled*/ if (no_new_branches(t)) { LM_INFO("discarding fwd for a 6xx transaction\n"); ser_error = E_NO_DESTINATION; return -1; } if (was_cancelled(t)) { /* is this the first attempt of sending a branch out ? */ if (t->nr_of_outgoings==0) { /* if no other signalling was performed on the transaction * and the transaction was already canceled, better * internally generate the 487 reply here */ if (locked) t_reply_unsafe( t, p_msg , 487 , &reply_reason_487); else t_reply( t, p_msg , 487 , &reply_reason_487); } LM_INFO("discarding fwd for a cancelled transaction\n"); ser_error = E_NO_DESTINATION; return -1; } /* backup current uri, sock and flags... add_uac changes it */ backup_uri = p_msg->new_uri; backup_dst = p_msg->dst_uri; bk_sock = p_msg->force_send_socket; bk_path = p_msg->path_vec; bk_bflags = p_msg->ruri_bflags; /* advertised address/port are not changed */ /* check if the UAS retranmission port needs to be updated */ if ( (p_msg->msg_flags ^ t->uas.request->msg_flags) & FL_FORCE_RPORT ) su_setport( &t->uas.response.dst.to, p_msg->rcv.src_port ); /* if no more specific error code is known, use this */ lowest_ret=E_BUG; /* branches added */ added_branches=0; /* branch to begin with */ if (reset_bcounter) { t->first_branch=t->nr_of_outgoings; /* check if the previous branch is a PHONY one and if yes * keep it in the set of active branches; that means the * transaction had a t_wait_for_new_branches() call prior to relay() */ if ( t->first_branch>0 && (t->uac[t->first_branch-1].flags & T_UAC_IS_PHONY) ) t->first_branch--; } /* as first branch, use current uri */ current_uri = *GET_RURI(p_msg); branch_ret = add_uac( t, p_msg, ¤t_uri, &backup_dst, getb0flags(p_msg), &p_msg->path_vec, proxy); if (branch_ret>=0) added_branches |= 1<<branch_ret; else lowest_ret=branch_ret; /* ....and now add the remaining additional branches */ for( idx=0; (current_uri.s=get_branch( idx, ¤t_uri.len, &q, &dst_uri, &path, &br_flags, &p_msg->force_send_socket))!=0 ; idx++ ) { branch_ret = add_uac( t, p_msg, ¤t_uri, &dst_uri, br_flags, &path, proxy); /* pick some of the errors in case things go wrong; note that picking lowest error is just as good as any other algorithm which picks any other negative branch result */ if (branch_ret>=0) added_branches |= 1<<branch_ret; else lowest_ret=branch_ret; } /* consume processed branches */ clear_branches(); /* restore original stuff */ p_msg->new_uri=backup_uri; p_msg->parsed_uri_ok = 0;/* just to be sure; add_uac may parse other uris*/ p_msg->dst_uri = backup_dst; p_msg->force_send_socket = bk_sock; p_msg->path_vec = bk_path; p_msg->ruri_bflags = bk_bflags; /* update on_branch, _only_ if modified, otherwise it overwrites * whatever it is already in the transaction */ if (get_on_branch()) t->on_branch = get_on_branch(); /* update flags, if changed in branch route */ t->uas.request->flags = p_msg->flags; /* things went wrong ... no new branch has been fwd-ed at all */ if (added_branches==0) { LM_ERR("failure to add branches\n"); ser_error = lowest_ret; return lowest_ret; } /* send them out now */ success_branch=0; for (i=t->first_branch; i<t->nr_of_outgoings; i++) { if (added_branches & (1<<i)) { if (t->uac[i].br_flags & tcp_no_new_conn_bflag) tcp_no_new_conn = 1; do { if (check_blacklists( t->uac[i].request.dst.proto, &t->uac[i].request.dst.to, t->uac[i].request.buffer.s, t->uac[i].request.buffer.len)) { LM_DBG("blocked by blacklists\n"); ser_error=E_IP_BLOCKED; } else { run_trans_callbacks(TMCB_PRE_SEND_BUFFER, t, p_msg, 0, i); if (SEND_BUFFER( &t->uac[i].request)==0) { ser_error = 0; break; } LM_ERR("sending request failed\n"); ser_error=E_SEND; } /* get next dns entry */ if ( t->uac[i].proxy==0 || get_next_su( t->uac[i].proxy, &t->uac[i].request.dst.to, (ser_error==E_IP_BLOCKED)?0:1)!=0 ) break; t->uac[i].request.dst.proto = t->uac[i].proxy->proto; /* update branch */ if ( update_uac_dst( p_msg, &t->uac[i] )!=0) break; }while(1); tcp_no_new_conn = 0; if (ser_error) { shm_free(t->uac[i].request.buffer.s); t->uac[i].request.buffer.s = NULL; t->uac[i].request.buffer.len = 0; continue; } success_branch++; start_retr( &t->uac[i].request ); set_kr(REQ_FWDED); /* successfully sent out -> run callbacks */ if ( has_tran_tmcbs( t, TMCB_REQUEST_BUILT|TMCB_MSG_SENT_OUT) ) { set_extra_tmcb_params( &t->uac[i].request.buffer, &t->uac[i].request.dst); run_trans_callbacks( TMCB_REQUEST_BUILT|TMCB_MSG_SENT_OUT, t, p_msg, 0, 0); } } } return (success_branch>0)?1:-1; }
/* function returns: * 1 - forward successful * -1 - error during forward */ int t_forward_nonack( struct cell *t, struct sip_msg* p_msg , struct proxy_l * proxy) { str backup_uri; str backup_dst; int branch_ret, lowest_ret; str current_uri; branch_bm_t added_branches; int i, q; struct cell *t_invite; int success_branch; str dst_uri; struct socket_info *bk_sock; unsigned int br_flags; unsigned int bk_br_flags; int idx; str path; str bk_path; /* make -Wall happy */ current_uri.s=0; /* before doing enything, update the t falgs from msg */ t->uas.request->flags = p_msg->flags; if (p_msg->REQ_METHOD==METHOD_CANCEL) { t_invite=t_lookupOriginalT( p_msg ); if (t_invite!=T_NULL_CELL) { t_invite->flags |= T_WAS_CANCELLED_FLAG; cancel_invite( p_msg, t, t_invite ); return 1; } } /* do not forward requests which were already cancelled*/ if (was_cancelled(t) || no_new_branches(t)) { LM_ERR("discarding fwd for a cancelled/6xx transaction\n"); ser_error = E_NO_DESTINATION; return -1; } /* backup current uri, sock and flags... add_uac changes it */ backup_uri = p_msg->new_uri; backup_dst = p_msg->dst_uri; bk_sock = p_msg->force_send_socket; bk_br_flags = getb0flags(); bk_path = p_msg->path_vec; /* check if the UAS retranmission port needs to be updated */ if ( (p_msg->msg_flags ^ t->uas.request->msg_flags) & FL_FORCE_RPORT ) su_setport( &t->uas.response.dst.to, p_msg->rcv.src_port ); /* if no more specific error code is known, use this */ lowest_ret=E_BUG; /* branches added */ added_branches=0; /* branch to begin with */ t->first_branch=t->nr_of_outgoings; /* as first branch, use current uri */ current_uri = *GET_RURI(p_msg); branch_ret = add_uac( t, p_msg, ¤t_uri, &backup_dst, &p_msg->path_vec, proxy); if (branch_ret>=0) added_branches |= 1<<branch_ret; else lowest_ret=branch_ret; /* ....and now add the remaining additional branches */ for( idx=0; (current_uri.s=get_branch( idx, ¤t_uri.len, &q, &dst_uri, &path, &br_flags, &p_msg->force_send_socket))!=0 ; idx++ ) { setb0flags(br_flags); branch_ret = add_uac( t, p_msg, ¤t_uri, &dst_uri, &path, proxy); /* pick some of the errors in case things go wrong; note that picking lowest error is just as good as any other algorithm which picks any other negative branch result */ if (branch_ret>=0) added_branches |= 1<<branch_ret; else lowest_ret=branch_ret; } /* consume processed branches */ clear_branches(); /* restore original stuff */ p_msg->new_uri=backup_uri; p_msg->parsed_uri_ok = 0;/* just to be sure; add_uac may parse other uris*/ p_msg->dst_uri = backup_dst; p_msg->force_send_socket = bk_sock; p_msg->path_vec = bk_path; setb0flags(bk_br_flags); /* update on_branch, if modified */ t->on_branch = get_on_branch(); /* update flags, if changed in branch route */ t->uas.request->flags = p_msg->flags; /* things went wrong ... no new branch has been fwd-ed at all */ if (added_branches==0) { LM_ERR("failure to add branches\n"); ser_error = lowest_ret; return lowest_ret; } /* send them out now */ success_branch=0; for (i=t->first_branch; i<t->nr_of_outgoings; i++) { if (added_branches & (1<<i)) { #ifdef USE_TCP if (t->uac[i].br_flags & tcp_no_new_conn_bflag) tcp_no_new_conn = 1; #endif do { if (check_blacklists( t->uac[i].request.dst.proto, &t->uac[i].request.dst.to, t->uac[i].request.buffer.s, t->uac[i].request.buffer.len)) { LM_DBG("blocked by blacklists\n"); ser_error=E_IP_BLOCKED; } else { if (SEND_BUFFER( &t->uac[i].request)==0) { ser_error = 0; break; } LM_ERR("sending request failed\n"); ser_error=E_SEND; } /* get next dns entry */ if ( t->uac[i].proxy==0 || get_next_su( t->uac[i].proxy, &t->uac[i].request.dst.to, (ser_error==E_IP_BLOCKED)?0:1)!=0 ) break; t->uac[i].request.dst.proto = t->uac[i].proxy->proto; /* update branch */ if ( update_uac_dst( p_msg, &t->uac[i] )!=0) break; }while(1); #ifdef USE_TCP tcp_no_new_conn = 0; #endif if (ser_error) { shm_free(t->uac[i].request.buffer.s); t->uac[i].request.buffer.s = NULL; t->uac[i].request.buffer.len = 0; continue; } success_branch++; start_retr( &t->uac[i].request ); set_kr(REQ_FWDED); /* successfully sent out -> run callbacks */ if ( has_tran_tmcbs( t, TMCB_REQUEST_BUILT) ) { set_extra_tmcb_params( &t->uac[i].request.buffer, &t->uac[i].request.dst); run_trans_callbacks( TMCB_REQUEST_BUILT, t, p_msg,0, -p_msg->REQ_METHOD); } } } return (success_branch>0)?1:-1; }
/* function returns: * 1 - forward successful * -1 - error during forward */ int t_forward_nonack( struct cell *t, struct sip_msg* p_msg , struct proxy_l * proxy, int proto) { str backup_uri; int branch_ret, lowest_ret; str current_uri; branch_bm_t added_branches; int first_branch; int i, q; struct cell *t_invite; int success_branch; int try_new; str dst_uri; /* make -Wall happy */ current_uri.s=0; set_kr(REQ_FWDED); if (p_msg->REQ_METHOD==METHOD_CANCEL) { t_invite=t_lookupOriginalT( p_msg ); if (t_invite!=T_NULL_CELL) { e2e_cancel( p_msg, t, t_invite ); UNREF(t_invite); return 1; } } /* backup current uri ... add_uac changes it */ backup_uri = p_msg->new_uri; /* if no more specific error code is known, use this */ lowest_ret=E_BUG; /* branches added */ added_branches=0; /* branch to begin with */ first_branch=t->nr_of_outgoings; /* on first-time forwarding, use current uri, later only what is in additional branches (which may be continuously refilled */ if (first_branch==0) { try_new=1; branch_ret=add_uac( t, p_msg, GET_RURI(p_msg), GET_NEXT_HOP(p_msg), proxy, proto ); if (branch_ret>=0) added_branches |= 1<<branch_ret; else lowest_ret=branch_ret; } else try_new=0; init_branch_iterator(); while((current_uri.s=next_branch( ¤t_uri.len, &q, &dst_uri.s, &dst_uri.len))) { try_new++; branch_ret=add_uac( t, p_msg, ¤t_uri, (dst_uri.len) ? (&dst_uri) : ¤t_uri, proxy, proto); /* pick some of the errors in case things go wrong; note that picking lowest error is just as good as any other algorithm which picks any other negative branch result */ if (branch_ret>=0) added_branches |= 1<<branch_ret; else lowest_ret=branch_ret; } /* consume processed branches */ clear_branches(); /* restore original URI */ p_msg->new_uri=backup_uri; /* don't forget to clear all branches processed so far */ /* things went wrong ... no new branch has been fwd-ed at all */ if (added_branches==0) { if (try_new==0) { LOG(L_ERR, "ERROR: t_forward_nonack: no branched for forwarding\n"); return -1; } LOG(L_ERR, "ERROR: t_forward_nonack: failure to add branches\n"); return lowest_ret; } /* send them out now */ success_branch=0; for (i=first_branch; i<t->nr_of_outgoings; i++) { if (added_branches & (1<<i)) { if (SEND_BUFFER( &t->uac[i].request)==-1) { LOG(L_ERR, "ERROR: t_forward_nonack: sending request failed\n"); if (proxy) { proxy->errors++; proxy->ok=0; } } else { success_branch++; } start_retr( &t->uac[i].request ); } } if (success_branch<=0) { ser_error=E_SEND; return -1; } return 1; }
/* function returns: * 1 - forward successful * -1 - error during forward */ int t_forward_nonack( struct cell *t, struct sip_msg* p_msg , struct proxy_l * proxy, int proto) { str backup_uri; str backup_dst; int branch_ret, lowest_ret; str current_uri; branch_bm_t added_branches; int i, q; struct cell *t_invite; int success_branch; int try_new; str dst_uri; struct socket_info *bk_sock; int rurib_flags; int br_flags; int idx; /* make -Wall happy */ current_uri.s=0; set_kr(REQ_FWDED); if (p_msg->REQ_METHOD==METHOD_CANCEL) { t_invite=t_lookupOriginalT( p_msg ); if (t_invite!=T_NULL_CELL) { t_invite->flags |= T_WAS_CANCELLED_FLAG; e2e_cancel( p_msg, t, t_invite ); UNREF(t_invite); return 1; } } /* do not forward requests which were already cancelled*/ if (was_cancelled(t)) { LOG(L_ERR,"ERROR:tm:t_forward_nonack: discarding fwd for " "a cancelled transaction\n"); return -1; } /* backup current uri, sock and flags ... add_uac changes it */ backup_uri = p_msg->new_uri; backup_dst = p_msg->dst_uri; bk_sock = p_msg->force_send_socket; rurib_flags = p_msg->flags&(~gflags_mask); /* if no more specific error code is known, use this */ lowest_ret=E_BUG; /* branches added */ added_branches=0; /* branch to begin with */ t->first_branch=t->nr_of_outgoings; /* on first-time forwarding, use current uri, later only what is in additional branches (which may be continuously refilled) */ if (t->first_branch==0) { try_new=1; current_uri = *GET_RURI(p_msg); branch_ret = add_uac( t, p_msg, ¤t_uri, &backup_dst, proxy, proto ); if (branch_ret>=0) added_branches |= 1<<branch_ret; else lowest_ret=branch_ret; } else try_new=0; for( idx=0; (current_uri.s=get_branch( idx, ¤t_uri.len, &q, &dst_uri, &br_flags, &p_msg->force_send_socket))!=0 ; idx++ ) { try_new++; p_msg->flags = (p_msg->flags&gflags_mask) | br_flags; branch_ret=add_uac( t, p_msg, ¤t_uri, &dst_uri, proxy, proto); /* pick some of the errors in case things go wrong; note that picking lowest error is just as good as any other algorithm which picks any other negative branch result */ if (branch_ret>=0) added_branches |= 1<<branch_ret; else lowest_ret=branch_ret; } /* consume processed branches */ clear_branches(); /* restore original stuff */ p_msg->new_uri=backup_uri; p_msg->parsed_uri_ok = 0;/* just to be sure; add_uac may parse other uris*/ p_msg->dst_uri = backup_dst; p_msg->force_send_socket = bk_sock; /* update on_branch, if modified */ t->on_branch = get_on_branch(); /* set flags */ p_msg->flags = (p_msg->flags&gflags_mask)|rurib_flags; t->uas.request->flags = p_msg->flags&gflags_mask; /* don't forget to clear all branches processed so far */ /* things went wrong ... no new branch has been fwd-ed at all */ if (added_branches==0) { if (try_new==0) { LOG(L_ERR, "ERROR:tm:t_forward_nonack: no branch for " "forwarding\n"); return -1; } LOG(L_ERR, "ERROR:tm:t_forward_nonack: failure to add branches\n"); return lowest_ret; } /* send them out now */ success_branch=0; for (i=t->first_branch; i<t->nr_of_outgoings; i++) { if (added_branches & (1<<i)) { if (SEND_BUFFER( &t->uac[i].request)==-1) { LOG(L_ERR, "ERROR:tm:t_forward_nonack: sending request " "failed\n"); if (proxy) { proxy->errors++; proxy->ok=0; } } else { success_branch++; } start_retr( &t->uac[i].request ); } } if (success_branch<=0) { ser_error=E_SEND; return -1; } return 1; }