/* WARNING: - dst_cell contains the created cell, but it is un-referenced
* (before using it make sure you REF() it first)
* - if ACK (method==ACK), a cell will be created but it will not
* be added in the hash table (should be either deleted by the
* caller)
*/
static inline int t_uac_prepare(uac_req_t *uac_r,
struct retr_buf **dst_req,
struct cell **dst_cell)
{
struct dest_info dst;
struct cell *new_cell;
struct retr_buf *request;
char* buf;
int buf_len, ret;
unsigned int hi;
int is_ack;
ticks_t lifetime;
#ifdef USE_DNS_FAILOVER
struct dns_srv_handle dns_h;
#endif
long nhtype;
#ifdef WITH_EVENT_LOCAL_REQUEST
struct cell *backup_t;
int backup_branch;
unsigned int backup_msgid;
static struct sip_msg lreq;
char *buf1;
int buf_len1;
int sflag_bk;
int backup_route_type;
#endif
snd_flags_t snd_flags;
tm_xlinks_t backup_xd;
tm_xdata_t local_xd;
ret=-1;
hi=0; /* make gcc happy */
/*if (dst_req) *dst_req = NULL;*/
is_ack = (((uac_r->method->len == 3) && (memcmp("ACK", uac_r->method->s, 3)==0)) ? 1 : 0);
/*** added by dcm
* - needed by external ua to send a request within a dlg
*/
if ((nhtype = w_calculate_hooks(uac_r->dialog)) < 0)
/* if err's returned, the message is incorrect */
goto error2;
if (!uac_r->dialog->loc_seq.is_set) {
/* this is the first request in the dialog,
set cseq to default value now - Miklos */
uac_r->dialog->loc_seq.value = DEFAULT_CSEQ;
uac_r->dialog->loc_seq.is_set = 1;
}
DBG("DEBUG:tm:t_uac: next_hop=<%.*s>\n",uac_r->dialog->hooks.next_hop->len,
uac_r->dialog->hooks.next_hop->s);
/* new message => take the dialog send_socket if set, or the default
send_socket if not*/
SND_FLAGS_INIT(&snd_flags);
#ifdef USE_DNS_FAILOVER
if (cfg_get(core, core_cfg, use_dns_failover)){
dns_srv_handle_init(&dns_h);
if ((uri2dst2(&dns_h, &dst, uac_r->dialog->send_sock, snd_flags,
uac_r->dialog->hooks.next_hop, PROTO_NONE)==0)
|| (dst.send_sock==0)){
dns_srv_handle_put(&dns_h);
ser_error = E_NO_SOCKET;
ret=ser_error;
LOG(L_ERR, "t_uac: no socket found\n");
goto error2;
}
dns_srv_handle_put(&dns_h); /* not needed anymore */
}else{
if ((uri2dst2(0, &dst, uac_r->dialog->send_sock, snd_flags,
uac_r->dialog->hooks.next_hop, PROTO_NONE)==0) ||
(dst.send_sock==0)){
ser_error = E_NO_SOCKET;
ret=ser_error;
LOG(L_ERR, "t_uac: no socket found\n");
goto error2;
}
}
#else /* USE_DNS_FAILOVER */
if ((uri2dst2(&dst, uac_r->dialog->send_sock, snd_flags,
uac_r->dialog->hooks.next_hop, PROTO_NONE)==0) ||
(dst.send_sock==0)){
ser_error = E_NO_SOCKET;
ret=ser_error;
LOG(L_ERR, "t_uac: no socket found\n");
goto error2;
}
#endif /* USE_DNS_FAILOVER */
/* build cell sets X/AVP lists to new transaction structure
* => bakup in a tmp struct and restore afterwards */
memset(&local_xd, 0, sizeof(tm_xdata_t));
tm_xdata_replace(&local_xd, &backup_xd);
new_cell = build_cell(0);
tm_xdata_replace(0, &backup_xd);
if (!new_cell) {
ret=E_OUT_OF_MEM;
LOG(L_ERR, "t_uac: short of cell shmem\n");
goto error2;
}
if (uac_r->method->len==INVITE_LEN && memcmp(uac_r->method->s, INVITE, INVITE_LEN)==0){
new_cell->flags |= T_IS_INVITE_FLAG;
new_cell->flags|=T_AUTO_INV_100 &
(!cfg_get(tm, tm_cfg, tm_auto_inv_100) -1);
#ifdef WITH_AS_SUPPORT
if (uac_r->cb_flags & TMCB_DONT_ACK)
new_cell->flags |= T_NO_AUTO_ACK;
#endif
lifetime=cfg_get(tm, tm_cfg, tm_max_inv_lifetime);
}else
lifetime=cfg_get(tm, tm_cfg, tm_max_noninv_lifetime);
new_cell->flags |= T_IS_LOCAL_FLAG;
/* init timers hack, new_cell->fr_timer and new_cell->fr_inv_timer
* must be set, or else the fr will happen immediately
* we can't call init_new_t() because we don't have a sip msg
* => we'll ignore t_set_fr() or avp timer value and will use directly the
* module params fr_inv_timer and fr_timer -- andrei */
new_cell->fr_timeout=cfg_get(tm, tm_cfg, fr_timeout);
new_cell->fr_inv_timeout=cfg_get(tm, tm_cfg, fr_inv_timeout);
new_cell->end_of_life=get_ticks_raw()+lifetime;
#ifdef TM_DIFF_RT_TIMEOUT
/* same as above for retransmission intervals */
new_cell->rt_t1_timeout_ms = cfg_get(tm, tm_cfg, rt_t1_timeout_ms);
new_cell->rt_t2_timeout_ms = cfg_get(tm, tm_cfg, rt_t2_timeout_ms);
#endif
set_kr(REQ_FWDED);
request = &new_cell->uac[0].request;
request->dst = dst;
request->flags |= nhtype;
if (!is_ack) {
#ifdef TM_DEL_UNREF
INIT_REF(new_cell, 1); /* ref'ed only from the hash */
#endif
hi=dlg2hash(uac_r->dialog);
LOCK_HASH(hi);
insert_into_hash_table_unsafe(new_cell, hi);
UNLOCK_HASH(hi);
}
buf = build_uac_req(uac_r->method, uac_r->headers, uac_r->body, uac_r->dialog, 0, new_cell,
&buf_len, &dst);
if (!buf) {
LOG(L_ERR, "t_uac: Error while building message\n");
ret=E_OUT_OF_MEM;
goto error1;
}
#ifdef WITH_EVENT_LOCAL_REQUEST
if (unlikely(goto_on_local_req>=0)) {
DBG("executing event_route[tm:local-request]\n");
if(likely(build_sip_msg_from_buf(&lreq, buf, buf_len, inc_msg_no())
== 0)) {
/* fill some field in sip_msg */
if (unlikely(set_dst_uri(&lreq, uac_r->dialog->hooks.next_hop))) {
LM_ERR("failed to set dst_uri");
free_sip_msg(&lreq);
} else {
struct onsend_info onsnd_info;
lreq.force_send_socket = uac_r->dialog->send_sock;
lreq.rcv.proto = dst.send_sock->proto;
lreq.rcv.src_ip = dst.send_sock->address;
lreq.rcv.src_port = dst.send_sock->port_no;
lreq.rcv.dst_port = su_getport(&dst.to);
su2ip_addr(&lreq.rcv.dst_ip, &dst.to);
lreq.rcv.src_su=dst.send_sock->su;
lreq.rcv.bind_address=dst.send_sock;
#ifdef USE_COMP
lreq.rcv.comp=dst.comp;
#endif /* USE_COMP */
sflag_bk = getsflags();
tm_xdata_swap(new_cell, &backup_xd, 0);
onsnd_info.to=&dst.to;
onsnd_info.send_sock=dst.send_sock;
onsnd_info.buf=buf;
onsnd_info.len=buf_len;
p_onsend=&onsnd_info;
/* run the route */
backup_route_type = get_route_type();
set_route_type(LOCAL_ROUTE);
/* set T to the current transaction */
backup_t=get_t();
backup_branch=get_t_branch();
backup_msgid=global_msg_id;
/* fake transaction and message id */
global_msg_id=lreq.id;
set_t(new_cell, T_BR_UNDEFINED);
run_top_route(event_rt.rlist[goto_on_local_req], &lreq, 0);
/* restore original environment */
set_t(backup_t, backup_branch);
global_msg_id=backup_msgid;
set_route_type( backup_route_type );
p_onsend=0;
/* restore original environment */
tm_xdata_swap(new_cell, &backup_xd, 1);
setsflagsval(sflag_bk);
if (unlikely(lreq.new_uri.s))
{
pkg_free(lreq.new_uri.s);
lreq.new_uri.s=0;
lreq.new_uri.len=0;
}
if (unlikely(lreq.dst_uri.s))
{
pkg_free(lreq.dst_uri.s);
lreq.dst_uri.s=0;
lreq.dst_uri.len=0;
}
if (unlikely(lreq.add_rm || lreq.body_lumps)) {
LM_DBG("apply new updates to sip msg\n");
buf1 = build_req_buf_from_sip_req(&lreq,
(unsigned int*)&buf_len1,
&dst, BUILD_NO_LOCAL_VIA|BUILD_NO_VIA1_UPDATE|
BUILD_IN_SHM);
if (likely(buf1)){
shm_free(buf);
buf = buf1;
buf_len = buf_len1;
/* a possible change of the method is not handled! */
}
}
lreq.buf=0; /* covers the obsolete DYN_BUF */
free_sip_msg(&lreq);
}
}
}
#endif
new_cell->method.s = buf;
new_cell->method.len = uac_r->method->len;
request->buffer = buf;
request->buffer_len = buf_len;
new_cell->nr_of_outgoings++;
/* Register the callbacks after everything is successful and nothing can fail.
Otherwise the callback parameter would be freed twise, once from TMCB_DESTROY,
and again because of the negative return code. */
if(uac_r->cb && insert_tmcb(&(new_cell->tmcb_hl), uac_r->cb_flags,
*(uac_r->cb), uac_r->cbp, NULL)!=1){
ret=E_OUT_OF_MEM;
LOG(L_ERR, "t_uac: short of tmcb shmem\n");
goto error1;
}
if (has_local_reqin_tmcbs())
run_local_reqin_callbacks(new_cell, 0, 0);
#ifdef DIALOG_CALLBACKS
run_trans_dlg_callbacks(uac_r->dialog, new_cell, request);
#endif /* DIALOG_CALLBACKS */
if (dst_req) *dst_req = request;
if (dst_cell) *dst_cell = new_cell;
else if(is_ack && dst_req==0){
free_cell(new_cell);
}
return 1;
error1:
if (!is_ack) {
LOCK_HASH(hi);
remove_from_hash_table_unsafe(new_cell);
UNLOCK_HASH(hi);
#ifdef TM_DEL_UNREF
UNREF_FREE(new_cell);
}else
#else
}
#endif
free_cell(new_cell);
error2:
return ret;
}
/*!
* helper function for stateless reply
*/
int sl_reply_helper(struct sip_msg *msg, int code, char *reason, str *tag)
{
str buf = {0, 0};
str dset = {0, 0};
struct dest_info dst;
struct bookmark dummy_bm;
int backup_mhomed, ret;
str text;
int rt, backup_rt;
struct run_act_ctx ctx;
struct sip_msg pmsg;
if (msg->first_line.u.request.method_value==METHOD_ACK)
goto error;
init_dest_info(&dst);
if (reply_to_via) {
if (update_sock_struct_from_via(&dst.to, msg, msg->via1 )==-1)
{
LOG(L_ERR, "ERROR: sl_reply_helper: cannot lookup reply dst: %s\n",
msg->via1->host.s);
goto error;
}
} else update_sock_struct_from_ip(&dst.to, msg);
/* if that is a redirection message, dump current message set to it */
if (code>=300 && code<400) {
dset.s=print_dset(msg, &dset.len);
if (dset.s) {
add_lump_rpl(msg, dset.s, dset.len, LUMP_RPL_HDR);
}
}
text.s = reason;
text.len = strlen(reason);
/* add a to-tag if there is a To header field without it */
if ( /* since RFC3261, we append to-tags anywhere we can, except
* 100 replies */
/* msg->first_line.u.request.method_value==METHOD_INVITE && */
code>=180 &&
(msg->to || (parse_headers(msg,HDR_TO_F, 0)!=-1 && msg->to))
&& (get_to(msg)->tag_value.s==0 || get_to(msg)->tag_value.len==0) )
{
if(tag!=NULL && tag->s!=NULL) {
buf.s = build_res_buf_from_sip_req(code, &text, tag,
msg, (unsigned int*)&buf.len, &dummy_bm);
} else {
calc_crc_suffix( msg, tag_suffix );
buf.s = build_res_buf_from_sip_req(code, &text, &sl_tag, msg,
(unsigned int*)&buf.len, &dummy_bm);
}
} else {
buf.s = build_res_buf_from_sip_req(code, &text, 0, msg,
(unsigned int*)&buf.len, &dummy_bm);
}
if (!buf.s)
{
DBG("DEBUG: sl_reply_helper: response building failed\n");
goto error;
}
sl_run_callbacks(SLCB_REPLY_READY, msg, code, reason, &buf, &dst);
/* supress multhoming support when sending a reply back -- that makes sure
that replies will come from where requests came in; good for NATs
(there is no known use for mhomed for locally generated replies;
note: forwarded cross-interface replies do benefit of mhomed!
*/
backup_mhomed=mhomed;
mhomed=0;
/* use for sending the received interface -bogdan*/
dst.proto=msg->rcv.proto;
dst.send_sock=msg->rcv.bind_address;
dst.id=msg->rcv.proto_reserved1;
#ifdef USE_COMP
dst.comp=msg->via1->comp_no;
#endif
dst.send_flags=msg->rpl_send_flags;
ret = msg_send(&dst, buf.s, buf.len);
mhomed=backup_mhomed;
rt = route_lookup(&event_rt, "sl:local-response");
if (unlikely(rt >= 0 && event_rt.rlist[rt] != NULL))
{
if (likely(build_sip_msg_from_buf(&pmsg, buf.s, buf.len,
inc_msg_no()) == 0))
{
char *tmp = NULL;
struct onsend_info onsnd_info;
onsnd_info.to=&dst.to;
onsnd_info.send_sock=dst.send_sock;
onsnd_info.buf=buf.s;
onsnd_info.len=buf.len;
p_onsend=&onsnd_info;
if (unlikely(!IS_SIP(msg)))
{
/* This is an HTTP reply... So fudge in a CSeq into the parsed message
message structure so that $rm will work in the route */
struct hdr_field *hf;
struct cseq_body *cseqb;
char *tmp2;
int len;
if ((hf = (struct hdr_field *) pkg_malloc(sizeof(struct hdr_field))) == NULL)
{
LM_ERR("out of package memory\n");
goto event_route_error;
}
if ((cseqb = (struct cseq_body *) pkg_malloc(sizeof(struct cseq_body))) == NULL)
{
LM_ERR("out of package memory\n");
pkg_free(hf);
goto event_route_error;
}
if ((tmp = (char *) pkg_malloc(sizeof(char) * (msg->first_line.u.request.method.len + 5))) == NULL)
{
LM_ERR("out of package memory\n");
pkg_free(cseqb);
pkg_free(hf);
goto event_route_error;
}
memset(hf, 0, sizeof(struct hdr_field));
memset(cseqb, 0, sizeof(struct cseq_body));
len = sprintf(tmp, "0 %.*s\r\n", msg->first_line.u.request.method.len, msg->first_line.u.request.method.s);
tmp2 = parse_cseq(tmp, &tmp[len], cseqb);
hf->type = HDR_CSEQ_T;
hf->body.s = tmp;
hf->body.len = tmp2 - tmp;
hf->parsed = cseqb;
pmsg.parsed_flag|=HDR_CSEQ_F;
pmsg.cseq = hf;
if (pmsg.last_header==0) {
pmsg.headers=hf;
pmsg.last_header=hf;
} else {
pmsg.last_header->next=hf;
pmsg.last_header=hf;
}
}
backup_rt = get_route_type();
set_route_type(LOCAL_ROUTE);
init_run_actions_ctx(&ctx);
run_top_route(event_rt.rlist[rt], &pmsg, 0);
set_route_type(backup_rt);
p_onsend=0;
if (tmp != NULL)
pkg_free(tmp);
event_route_error:
free_sip_msg(&pmsg);
}
}
pkg_free(buf.s);
if (ret<0) {
goto error;
}
*(sl_timeout) = get_ticks() + SL_RPL_WAIT_TIME;
update_sl_stats(code);
return 1;
error:
update_sl_failures();
return -1;
}