/*only the content*/
void free_sip_msg(struct sip_msg* msg)
{
if (msg->msg_cb) { msg_callback_process(msg, MSG_DESTROY, NULL); }
if (msg->new_uri.s) { pkg_free(msg->new_uri.s); msg->new_uri.len=0; }
if (msg->set_global_address.s) {
pkg_free(msg->set_global_address.s);
msg->set_global_address.s = NULL;
}
if (msg->set_global_port.s) {
pkg_free(msg->set_global_port.s);
msg->set_global_port.s = NULL;
}
if (msg->dst_uri.s) { pkg_free(msg->dst_uri.s); msg->dst_uri.len=0; }
if (msg->path_vec.s) { pkg_free(msg->path_vec.s); msg->path_vec.len=0; }
if (msg->headers) free_hdr_field_lst(msg->headers);
if (msg->sdp) free_sdp(&(msg->sdp));
if (msg->add_rm) free_lump_list(msg->add_rm);
if (msg->body_lumps) free_lump_list(msg->body_lumps);
if (msg->reply_lump) free_reply_lump(msg->reply_lump);
if (msg->multi ) { free_multi_body(msg->multi);msg->multi = 0;}
/* don't free anymore -- now a pointer to a static buffer */
# ifdef DYN_BUF
pkg_free(msg->buf);
# endif
}
inline static void free_faked_req(struct sip_msg *faked_req, struct cell *t)
{
if (faked_req->new_uri.s) {
pkg_free(faked_req->new_uri.s);
faked_req->new_uri.s = 0;
}
if (faked_req->dst_uri.s) {
pkg_free(faked_req->dst_uri.s);
faked_req->dst_uri.s = 0;
}
if (faked_req->path_vec.s) {
pkg_free(faked_req->path_vec.s);
faked_req->path_vec.s = 0;
}
/* SDP in not cloned into SHM, so if we have one, it means the SDP
* was parsed in the fake environment, so we have to free it */
if (faked_req->sdp)
free_sdp(&(faked_req->sdp));
if (faked_req->multi) {
free_multi_body(faked_req->multi);
faked_req->multi = 0;
}
if (faked_req->msg_cb) {
msg_callback_process(faked_req, MSG_DESTROY, NULL);
}
/* free all types of lump that were added in failure handlers */
del_notflaged_lumps( &(faked_req->add_rm), LUMPFLAG_SHMEM );
del_notflaged_lumps( &(faked_req->body_lumps), LUMPFLAG_SHMEM );
del_nonshm_lump_rpl( &(faked_req->reply_lump) );
clean_msg_clone( faked_req, t->uas.request, t->uas.end_request);
}
/* introduce a new uac to transaction; returns its branch id (>=0)
or error (<0); it doesn't send a message yet -- a reply to it
might interfere with the processes of adding multiple branches
*/
static int add_uac( struct cell *t, struct sip_msg *request, str *uri,
str* next_hop, unsigned int bflags, str* path, struct proxy_l *proxy)
{
unsigned short branch;
struct sip_msg_body *body_clone=NO_BODY_CLONE_MARKER;
int do_free_proxy;
int ret;
branch=t->nr_of_outgoings;
if (branch==MAX_BRANCHES) {
LM_ERR("maximum number of branches exceeded\n");
ret=E_CFG;
goto error;
}
/* check existing buffer -- rewriting should never occur */
if (t->uac[branch].request.buffer.s) {
LM_CRIT("buffer rewrite attempt\n");
ret=ser_error=E_BUG;
goto error;
}
/* set proper RURI to request to reflect the branch */
request->new_uri=*uri;
request->parsed_uri_ok=0;
request->dst_uri=*next_hop;
request->path_vec=*path;
request->ruri_bflags=bflags;
if ( pre_print_uac_request( t, branch, request, &body_clone)!= 0 ) {
ret = -1;
goto error01;
}
/* check DNS resolution */
if (proxy){
do_free_proxy = 0;
}else {
proxy=uri2proxy( request->dst_uri.len ?
&request->dst_uri:&request->new_uri,
request->force_send_socket ?
request->force_send_socket->proto : PROTO_NONE );
if (proxy==0) {
ret=E_BAD_ADDRESS;
goto error01;
}
do_free_proxy = 1;
}
msg_callback_process(request, REQ_PRE_FORWARD, (void *)proxy);
if ( !(t->flags&T_NO_DNS_FAILOVER_FLAG) ) {
t->uac[branch].proxy = shm_clone_proxy( proxy , do_free_proxy );
if (t->uac[branch].proxy==NULL) {
ret = E_OUT_OF_MEM;
goto error02;
}
}
/* use the first address */
hostent2su( &t->uac[branch].request.dst.to,
&proxy->host, proxy->addr_idx, proxy->port ? proxy->port:SIP_PORT);
t->uac[branch].request.dst.proto = proxy->proto;
/* do print of the uac request */
if ( update_uac_dst( request, &t->uac[branch] )!=0) {
ret = ser_error;
goto error02;
}
/* things went well, move ahead */
t->uac[branch].uri.s=t->uac[branch].request.buffer.s+
request->first_line.u.request.method.len+1;
t->uac[branch].uri.len=request->new_uri.len;
t->uac[branch].br_flags = request->ruri_bflags;
t->uac[branch].added_rr = count_local_rr( request );
t->nr_of_outgoings++;
/* done! */
ret=branch;
error02:
if(do_free_proxy) {
free_proxy( proxy );
pkg_free( proxy );
}
error01:
post_print_uac_request( request, uri, next_hop, body_clone);
if (ret < 0) {
/* destroy all the bavps added, the path vector and the destination,
* since this branch will never be properly added to
* the UAC list, otherwise we'll have memory leaks - razvanc */
clean_branch(t->uac[branch]);
memset(&t->uac[branch], 0, sizeof(t->uac[branch]));
init_branch(&t->uac[branch], branch, t->wait_tl.set, t);
}
error:
return ret;
}
/* introduce a new uac to transaction; returns its branch id (>=0)
or error (<0); it doesn't send a message yet -- a reply to it
might interfere with the processes of adding multiple branches
*/
static int add_uac( struct cell *t, struct sip_msg *request, str *uri,
str* next_hop, str* path, struct proxy_l *proxy)
{
unsigned short branch;
int do_free_proxy;
int ret;
branch=t->nr_of_outgoings;
if (branch==MAX_BRANCHES) {
LM_ERR("maximum number of branches exceeded\n");
ret=E_CFG;
goto error;
}
/* check existing buffer -- rewriting should never occur */
if (t->uac[branch].request.buffer.s) {
LM_CRIT("buffer rewrite attempt\n");
ret=ser_error=E_BUG;
goto error;
}
/* set proper RURI to request to reflect the branch */
request->new_uri=*uri;
request->parsed_uri_ok=0;
request->dst_uri=*next_hop;
request->path_vec=*path;
if ( pre_print_uac_request( t, branch, request)!= 0 ) {
ret = -1;
goto error01;
}
/* check DNS resolution */
if (proxy){
do_free_proxy = 0;
}else {
proxy=uri2proxy( request->dst_uri.len ?
&request->dst_uri:&request->new_uri, PROTO_NONE );
if (proxy==0) {
ret=E_BAD_ADDRESS;
goto error01;
}
do_free_proxy = 1;
}
msg_callback_process(request, REQ_PRE_FORWARD, (void *)proxy);
if ( !(t->flags&T_NO_DNS_FAILOVER_FLAG) ) {
t->uac[branch].proxy = shm_clone_proxy( proxy , do_free_proxy );
if (t->uac[branch].proxy==NULL) {
ret = E_OUT_OF_MEM;
goto error02;
}
}
/* use the first address */
hostent2su( &t->uac[branch].request.dst.to,
&proxy->host, proxy->addr_idx, proxy->port ? proxy->port:SIP_PORT);
t->uac[branch].request.dst.proto = proxy->proto;
if ( update_uac_dst( request, &t->uac[branch] )!=0) {
ret = ser_error;
goto error02;
}
/* things went well, move ahead */
t->uac[branch].uri.s=t->uac[branch].request.buffer.s+
request->first_line.u.request.method.len+1;
t->uac[branch].uri.len=request->new_uri.len;
t->uac[branch].br_flags = getb0flags();
t->uac[branch].added_rr = count_local_rr( request );
t->nr_of_outgoings++;
/* done! */
ret=branch;
error02:
if(do_free_proxy) {
free_proxy( proxy );
pkg_free( proxy );
}
error01:
post_print_uac_request( request, uri, next_hop);
error:
return ret;
}
int forward_request( struct sip_msg* msg, struct proxy_l * p)
{
union sockaddr_union to;
unsigned int len;
char* buf;
struct socket_info* send_sock;
struct socket_info* last_sock;
str *branch;
buf=0;
/* calculate branch for outbound request - if the branch buffer is already
* set (maybe by an upper level as TM), used it; otherwise computes
* the branch for stateless fwd. . According to the latest discussions
* on the topic, you should reuse the latest statefull branch
* --bogdan */
if ( msg->add_to_branch_len==0 ) {
branch = get_sl_branch(msg);
if (branch==0) {
LM_ERR("unable to compute branch\n");
goto error;
}
msg->add_to_branch_len = branch->len;
memcpy( msg->add_to_branch_s, branch->s, branch->len);
}
msg_callback_process(msg, REQ_PRE_FORWARD, (void *)p);
hostent2su( &to, &p->host, p->addr_idx, (p->port)?p->port:SIP_PORT);
last_sock = 0;
if (getb0flags() & tcp_no_new_conn_bflag)
tcp_no_new_conn = 1;
do {
send_sock=get_send_socket( msg, &to, p->proto);
if (send_sock==0){
LM_ERR("cannot forward to af %d, proto %d no corresponding"
"listening socket\n", to.s.sa_family, p->proto);
ser_error=E_NO_SOCKET;
continue;
}
if ( last_sock!=send_sock ) {
if (buf)
pkg_free(buf);
buf = build_req_buf_from_sip_req(msg, &len, send_sock, p->proto, 0);
if (!buf){
LM_ERR("building req buf failed\n");
tcp_no_new_conn = 0;
goto error;
}
last_sock = send_sock;
}
if (check_blacklists( p->proto, &to, buf, len)) {
LM_DBG("blocked by blacklists\n");
ser_error=E_IP_BLOCKED;
continue;
}
/* send it! */
LM_DBG("sending:\n%.*s.\n", (int)len, buf);
LM_DBG("orig. len=%d, new_len=%d, proto=%d\n",
msg->len, len, p->proto );
if (msg_send(send_sock, p->proto, &to, 0, buf, len)<0){
ser_error=E_SEND;
continue;
}
run_fwd_callbacks( msg, buf, len, send_sock, p->proto, &to);
ser_error = 0;
break;
}while( get_next_su( p, &to, (ser_error==E_IP_BLOCKED)?0:1)==0 );
tcp_no_new_conn = 0;
if (ser_error) {
update_stat( drp_reqs, 1);
goto error;
}
/* sent requests stats */
update_stat( fwd_reqs, 1);
pkg_free(buf);
/* received_buf & line_buf will be freed in receive_msg by free_lump_list*/
return 0;
error:
if (buf) pkg_free(buf);
return -1;
}
