int e2e_cancel_branch( struct sip_msg *cancel_msg, struct cell *t_cancel,
struct cell *t_invite, int branch )
{
int ret;
char *shbuf;
unsigned int len;
if (t_cancel->uac[branch].request.buffer) {
LOG(L_CRIT, "ERROR: e2e_cancel_branch: buffer rewrite attempt\n");
ret=ser_error=E_BUG;
goto error;
}
/* note -- there is a gap in proxy stats -- we don't update
proxy stats with CANCEL (proxy->ok, proxy->tx, etc.)
*/
/* print */
shbuf=print_uac_request( t_cancel, cancel_msg, branch,
&t_invite->uac[branch].uri, &len,
t_invite->uac[branch].request.dst.send_sock,
t_invite->uac[branch].request.dst.proto);
if (!shbuf) {
LOG(L_ERR, "ERROR: e2e_cancel_branch: printing e2e cancel failed\n");
ret=ser_error=E_OUT_OF_MEM;
goto error;
}
/* install buffer */
t_cancel->uac[branch].request.dst=t_invite->uac[branch].request.dst;
t_cancel->uac[branch].request.buffer=shbuf;
t_cancel->uac[branch].request.buffer_len=len;
t_cancel->uac[branch].uri.s=t_cancel->uac[branch].request.buffer+
cancel_msg->first_line.u.request.method.len+1;
t_cancel->uac[branch].uri.len=t_invite->uac[branch].uri.len;
/* success */
ret=1;
error:
return ret;
}
static inline int update_uac_dst( struct sip_msg *request,
struct ua_client *uac )
{
struct socket_info* send_sock;
char *shbuf;
unsigned int len;
send_sock = get_send_socket( request, &uac->request.dst.to ,
uac->request.dst.proto );
if (send_sock==0) {
LM_ERR("failed to fwd to af %d, proto %d "
" (no corresponding listening socket)\n",
uac->request.dst.to.s.sa_family, uac->request.dst.proto );
ser_error=E_NO_SOCKET;
return -1;
}
if (send_sock!=uac->request.dst.send_sock) {
/* rebuild */
shbuf = print_uac_request( request, &len, send_sock,
uac->request.dst.proto);
if (!shbuf) {
ser_error=E_OUT_OF_MEM;
return -1;
}
if (uac->request.buffer.s)
shm_free(uac->request.buffer.s);
/* things went well, move ahead and install new buffer! */
uac->request.dst.send_sock = send_sock;
uac->request.dst.proto_reserved1 = 0;
uac->request.buffer.s = shbuf;
uac->request.buffer.len = len;
}
return 0;
}
int e2e_cancel_branch( struct sip_msg *cancel_msg, struct cell *t_cancel,
struct cell *t_invite, int branch )
{
int ret;
char *shbuf;
unsigned int len;
str bk_dst_uri;
str bk_path_vec;
if (t_cancel->uac[branch].request.buffer.s) {
LM_CRIT("buffer rewrite attempt\n");
ret=ser_error=E_BUG;
goto error;
}
cancel_msg->new_uri = t_invite->uac[branch].uri;
cancel_msg->parsed_uri_ok=0;
bk_dst_uri = cancel_msg->dst_uri;
bk_path_vec = cancel_msg->path_vec;
/* force same path as for request */
cancel_msg->path_vec = t_invite->uac[branch].path_vec;
if ( pre_print_uac_request( t_cancel, branch, cancel_msg)!= 0 ) {
ret = -1;
goto error01;
}
/* force same uri as in INVITE */
if (cancel_msg->new_uri.s!=t_invite->uac[branch].uri.s) {
pkg_free(cancel_msg->new_uri.s);
cancel_msg->new_uri = t_invite->uac[branch].uri;
/* and just to be sure */
cancel_msg->parsed_uri_ok = 0;
}
/* print */
shbuf=print_uac_request( cancel_msg, &len,
t_invite->uac[branch].request.dst.send_sock,
t_invite->uac[branch].request.dst.proto);
if (!shbuf) {
LM_ERR("printing e2e cancel failed\n");
ret=ser_error=E_OUT_OF_MEM;
goto error01;
}
/* install buffer */
t_cancel->uac[branch].request.dst=t_invite->uac[branch].request.dst;
t_cancel->uac[branch].request.buffer.s=shbuf;
t_cancel->uac[branch].request.buffer.len=len;
t_cancel->uac[branch].uri.s=t_cancel->uac[branch].request.buffer.s+
cancel_msg->first_line.u.request.method.len+1;
t_cancel->uac[branch].uri.len=t_invite->uac[branch].uri.len;
t_cancel->uac[branch].br_flags = cancel_msg->flags;
/* success */
ret=1;
error01:
post_print_uac_request( cancel_msg, &t_invite->uac[branch].uri,
&bk_dst_uri);
cancel_msg->dst_uri = bk_dst_uri;
cancel_msg->path_vec = bk_path_vec;
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
*/
int add_uac( struct cell *t, struct sip_msg *request, str *uri, str* next_hop,
struct proxy_l *proxy, int proto )
{
int ret;
short temp_proxy;
union sockaddr_union to;
unsigned short branch;
struct socket_info* send_sock;
char *shbuf;
unsigned int len;
branch=t->nr_of_outgoings;
if (branch==MAX_BRANCHES) {
LOG(L_ERR, "ERROR: add_uac: maximum number of branches exceeded\n");
ret=E_CFG;
goto error;
}
/* check existing buffer -- rewriting should never occur */
if (t->uac[branch].request.buffer) {
LOG(L_CRIT, "ERROR: add_uac: buffer rewrite attempt\n");
ret=ser_error=E_BUG;
goto error;
}
/* check DNS resolution */
if (proxy) {
temp_proxy=0;
proto=get_proto(proto, proxy->proto);
} else {
proxy=uri2proxy( next_hop ? next_hop : uri, proto );
if (proxy==0) {
ret=E_BAD_ADDRESS;
goto error;
}
proto=proxy->proto; /* uri2proxy will fix it for us */
temp_proxy=1;
}
if (proxy->ok==0) {
if (proxy->host.h_addr_list[proxy->addr_idx+1])
proxy->addr_idx++;
else proxy->addr_idx=0;
proxy->ok=1;
}
hostent2su( &to, &proxy->host, proxy->addr_idx,
proxy->port ? proxy->port:SIP_PORT);
send_sock=get_send_socket( request, &to , proto);
if (send_sock==0) {
LOG(L_ERR, "ERROR: add_uac: can't fwd to af %d, proto %d "
" (no corresponding listening socket)\n",
to.s.sa_family, proto );
ret=ser_error=E_NO_SOCKET;
goto error01;
}
/* now message printing starts ... */
shbuf=print_uac_request( t, request, branch, uri,
&len, send_sock, proto );
if (!shbuf) {
ret=ser_error=E_OUT_OF_MEM;
goto error01;
}
/* things went well, move ahead and install new buffer! */
t->uac[branch].request.dst.to=to;
t->uac[branch].request.dst.send_sock=send_sock;
t->uac[branch].request.dst.proto=proto;
t->uac[branch].request.dst.proto_reserved1=0;
t->uac[branch].request.buffer=shbuf;
t->uac[branch].request.buffer_len=len;
t->uac[branch].uri.s=t->uac[branch].request.buffer+
request->first_line.u.request.method.len+1;
t->uac[branch].uri.len=uri->len;
t->nr_of_outgoings++;
/* update stats */
proxy->tx++;
proxy->tx_bytes+=len;
/* done! */
ret=branch;
error01:
if (temp_proxy) {
free_proxy( proxy );
pkg_free( proxy );
}
error:
return ret;
}
int e2e_cancel_branch( struct sip_msg *cancel_msg, struct cell *t_cancel,
struct cell *t_invite, int branch )
{
int ret;
char *shbuf;
unsigned int len;
str bk_dst_uri;
if (t_cancel->uac[branch].request.buffer) {
LOG(L_CRIT, "ERROR: e2e_cancel_branch: buffer rewrite attempt\n");
ret=ser_error=E_BUG;
goto error;
}
/* note -- there is a gap in proxy stats -- we don't update
proxy stats with CANCEL (proxy->ok, proxy->tx, etc.) */
cancel_msg->new_uri = t_invite->uac[branch].uri;
cancel_msg->parsed_uri_ok=0;
bk_dst_uri = cancel_msg->dst_uri;
if ( pre_print_uac_request( t_cancel, branch, cancel_msg)!= 0 ) {
ret = -1;
goto error01;
}
/* force same uri as in INVITE */
if (cancel_msg->new_uri.s!=t_invite->uac[branch].uri.s) {
pkg_free(cancel_msg->new_uri.s);
cancel_msg->new_uri = t_invite->uac[branch].uri;
/* and just to be sure */
cancel_msg->parsed_uri_ok = 0;
}
/* print */
shbuf=print_uac_request( cancel_msg, &len,
t_invite->uac[branch].request.dst.send_sock,
t_invite->uac[branch].request.dst.proto);
if (!shbuf) {
LOG(L_ERR, "ERROR: e2e_cancel_branch: printing e2e cancel failed\n");
ret=ser_error=E_OUT_OF_MEM;
goto error01;
}
/* install buffer */
t_cancel->uac[branch].request.dst=t_invite->uac[branch].request.dst;
t_cancel->uac[branch].request.buffer=shbuf;
t_cancel->uac[branch].request.buffer_len=len;
t_cancel->uac[branch].uri.s=t_cancel->uac[branch].request.buffer+
cancel_msg->first_line.u.request.method.len+1;
t_cancel->uac[branch].uri.len=t_invite->uac[branch].uri.len;
t_cancel->uac[branch].br_flags = cancel_msg->flags&(~gflags_mask);
/* success */
ret=1;
error01:
post_print_uac_request( cancel_msg, &t_invite->uac[branch].uri,
&bk_dst_uri);
cancel_msg->dst_uri = bk_dst_uri;
error:
return ret;
}
