/* Revoke the suspension of the SIP request, i.e.
* cancel the fr timer of the blind uac.
* This function can be called when something fails
* after t_suspend() has already been executed in the same
* process, and it turns out that the transaction should
* not have been suspended.
*
* Return value:
* 0 - success
* <0 - failure
*/
int t_cancel_suspend(unsigned int hash_index, unsigned int label)
{
struct cell *t;
int branch;
t = get_t();
if (!t || t == T_UNDEFINED) {
LOG(L_ERR, "ERROR: t_revoke_suspend: " \
"no active transaction\n");
return -1;
}
/* Only to double-check the IDs */
if ((t->hash_index != hash_index)
|| (t->label != label)
) {
LOG(L_ERR, "ERROR: t_revoke_suspend: " \
"transaction id mismatch\n");
return -1;
}
if(t->async_backup.backup_route != TM_ONREPLY_ROUTE){
/* The transaction does not need to be locked because this
* function is either executed from the original route block
* or from failure route which already locks */
reset_kr(); /* the blind UAC of t_suspend has set kr */
/* Try to find the blind UAC, and cancel its fr timer.
* We assume that the last blind uac called this function. */
for ( branch = t->nr_of_outgoings-1;
branch >= 0 && t->uac[branch].request.buffer;
branch--);
if (branch >= 0) {
stop_rb_timers(&t->uac[branch].request);
/* Set last_received to something >= 200,
* the actual value does not matter, the branch
* will never be picked up for response forwarding.
* If last_received is lower than 200,
* then the branch may tried to be cancelled later,
* for example when t_reply() is called from
* a failure rute => deadlock, because both
* of them need the reply lock to be held. */
t->uac[branch].last_received=500;
} else {
/* Not a huge problem, fr timer will fire, but CANCEL
will not be sent. last_received will be set to 408. */
return -1;
}
}else{
branch = t->async_backup.backup_branch;
LOG(L_DBG,"DEBUG: t_cancel_suspend_reply: This is a cancel suspend for a response\n");
t->uac[branch].reply->msg_flags &= ~FL_RPL_SUSPENDED;
if (t->uas.request) t->uas.request->msg_flags&= ~FL_RPL_SUSPENDED;
}
return 0;
}
static int script_init( struct sip_msg *foo, void *bar)
{
/* we primarily reset all private memory here to make sure
* private values left over from previous message will
* not be used again */
set_t(T_UNDEFINED);
reset_cancelled_t();
reset_e2eack_t();
/* reset the kr status */
reset_kr();
/* reset the static holders for T routes */
t_on_negative( 0 );
t_on_reply(0);
t_on_branch(0);
return 1;
}
static int script_init( struct sip_msg *foo, void *bar)
{
/* we primarily reset all private memory here to make sure
* private values left over from previous message will
* not be used again */
set_t(T_UNDEFINED);
reset_cancelled_t();
reset_e2eack_t();
fr_timeout = timer_id2timeout[FR_TIMER_LIST];
fr_inv_timeout = timer_id2timeout[FR_INV_TIMER_LIST];
/* reset the kill reason status */
reset_kr();
/* reset the static holders for T routes */
t_on_negative( 0 );
t_on_reply(0);
t_on_branch(0);
return SCB_RUN_ALL;
}
/* This is the neurological point of reply processing -- called
* from within a REPLY_LOCK, t_should_relay_response decides
* how a reply shall be processed and how transaction state is
* affected.
*
* Checks if the new reply (with new_code status) should be sent or not
* based on the current
* transaction status.
* Returns - branch number (0,1,...) which should be relayed
* -1 if nothing to be relayed
*/
static enum rps t_should_relay_response( struct cell *Trans , int new_code,
int branch , int *should_store, int *should_relay,
branch_bm_t *cancel_bitmap, struct sip_msg *reply )
{
int branch_cnt;
int picked_code;
int inv_through;
int do_cancel;
/* note: this code never lets replies to CANCEL go through;
we generate always a local 200 for CANCEL; 200s are
not relayed because it's not an INVITE transaction;
>= 300 are not relayed because 200 was already sent
out
*/
LM_DBG("T_code=%d, new_code=%d\n", Trans->uas.status,new_code);
inv_through=new_code>=200 && new_code<300 && is_invite(Trans);
/* if final response sent out, allow only INVITE 2xx */
if ( Trans->uas.status >= 200 ) {
if (inv_through) {
LM_DBG("200 OK for INVITE after final sent\n");
*should_store=0;
Trans->uac[branch].last_received=new_code;
*should_relay=branch;
return RPS_PUSHED_AFTER_COMPLETION;
}
if ( is_hopbyhop_cancel(Trans) && new_code>=200) {
*should_store=0;
*should_relay=-1;
picked_branch=-1;
return RPS_COMPLETED;
}
/* except the exception above, too late messages will
be discarded */
goto discard;
}
/* if final response received at this branch, allow only INVITE 2xx */
if (Trans->uac[branch].last_received>=200
&& !(inv_through && Trans->uac[branch].last_received<300)) {
#ifdef EXTRA_DEBUG
/* don't report on retransmissions */
if (Trans->uac[branch].last_received==new_code) {
LM_DBG("final reply retransmission\n");
} else
/* if you FR-timed-out, faked a local 408 and 487 came, don't
* report on it either */
if (Trans->uac[branch].last_received==408 && new_code==487) {
LM_DBG("487 reply came for a timed-out branch\n");
} else {
/* this looks however how a very strange status rewrite attempt;
* report on it */
LM_DBG("status rewrite by UAS: stored: %d, received: %d\n",
Trans->uac[branch].last_received, new_code );
}
#endif
goto discard;
}
/* no final response sent yet */
/* negative replies subject to fork picking */
if (new_code >=300 ) {
Trans->uac[branch].last_received=new_code;
/* also append the current reply to the transaction to
* make it available in failure routes - a kind of "fake"
* save of the final reply per branch */
Trans->uac[branch].reply = reply;
if (new_code>=600 && !disable_6xx_block) {
/* this is a winner and close all branches */
which_cancel( Trans, cancel_bitmap );
picked_branch=branch;
/* no more new branches should be added to this transaction */
Trans->flags |= T_NO_NEW_BRANCHES_FLAG;
} else {
/* if all_final return lowest */
picked_branch = t_pick_branch( Trans, &picked_code, &do_cancel);
if (picked_branch==-2) { /* branches open yet */
*should_store=1;
*should_relay=-1;
picked_branch=-1;
Trans->uac[branch].reply = 0;
return RPS_STORE;
}
if (picked_branch==-1) {
LM_CRIT("pick_branch failed (lowest==-1) for code %d\n",new_code);
Trans->uac[branch].reply = 0;
goto discard;
}
if (do_cancel) {
branch_bm_t cb = 0;
which_cancel( Trans, &cb );
cleanup_uac_timers(Trans);
cancel_uacs( Trans, cb);
}
}
/* no more pending branches -- try if that changes after
* a callback; save branch count to be able to determine
* later if new branches were initiated */
branch_cnt=Trans->nr_of_outgoings;
reset_kr();
if ( !(Trans->flags&T_NO_DNS_FAILOVER_FLAG) &&
Trans->uac[picked_branch].proxy!=NULL ) {
/* is is a DNS failover scenario, according to RFC 3263 ? */
if (is_3263_failure(Trans)) {
LM_DBG("trying DNS-based failover\n");
/* do DNS failover -> add new branches */
if (do_dns_failover( Trans )!=0) {
/* skip the failed added branches */
branch_cnt = Trans->nr_of_outgoings;
}
}
}
/* run ON_FAILURE handlers ( route and callbacks) */
if ( branch_cnt==Trans->nr_of_outgoings &&
(has_tran_tmcbs( Trans, TMCB_ON_FAILURE) || Trans->on_negative) ) {
run_failure_handlers( Trans );
}
/* now reset it; after the failure logic, the reply may
* not be stored any more and we don't want to keep into
* transaction some broken reference */
Trans->uac[branch].reply = 0;
/* look if the callback perhaps replied transaction; it also
covers the case in which a transaction is replied localy
on CANCEL -- then it would make no sense to proceed to
new branches bellow
*/
if (Trans->uas.status >= 200) {
*should_store=0;
*should_relay=-1;
/* this might deserve an improvement -- if something
was already replied, it was put on wait and then,
returning RPS_COMPLETED will make t_on_reply
put it on wait again; perhaps splitting put_on_wait
from send_reply or a new RPS_ code would be healthy
*/
picked_branch=-1;
return RPS_COMPLETED;
}
/* look if the callback/failure_route introduced new branches ... */
if (branch_cnt<Trans->nr_of_outgoings && get_kr()==REQ_FWDED) {
/* await then result of new branches */
*should_store=1;
*should_relay=-1;
picked_branch=-1;
return RPS_STORE;
}
/* really no more pending branches -- return selected code */
*should_store=0;
*should_relay=picked_branch;
picked_branch=-1;
return RPS_COMPLETED;
}
/* not >=300 ... it must be 2xx or provisional 1xx */
if (new_code>=100) {
/* 1xx and 2xx except 100 will be relayed */
Trans->uac[branch].last_received=new_code;
*should_store=0;
*should_relay= new_code==100? -1 : branch;
if (new_code>=200 ) {
which_cancel( Trans, cancel_bitmap );
return RPS_COMPLETED;
} else return RPS_PROVISIONAL;
}
discard:
*should_store=0;
*should_relay=-1;
return RPS_DISCARDED;
}
/* function triggered from reactor in order to continue the processing
*/
int t_resume_async(int *fd, void *param)
{
static struct sip_msg faked_req;
static struct ua_client uac;
async_ctx *ctx = (async_ctx *)param;
struct cell *backup_t;
struct cell *backup_cancelled_t;
struct cell *backup_e2eack_t;
struct usr_avp **backup_list;
struct socket_info* backup_si;
struct cell *t= ctx->t;
int route;
LM_DBG("resuming on fd %d, transaction %p \n",*fd, t);
if (current_processing_ctx) {
LM_CRIT("BUG - a context already set!\n");
abort();
}
/* prepare for resume route */
uac.br_flags = getb0flags( t->uas.request ) ;
uac.uri = *GET_RURI( t->uas.request );
if (!fake_req( &faked_req /* the fake msg to be built*/,
t->uas.request, /* the template msg saved in transaction */
&t->uas, /*the UAS side of the transaction*/
&uac, /* the fake UAC */
1 /* copy dst_uri too */)
) {
LM_ERR("fake_req failed\n");
return 0;
}
/* enviroment setting */
current_processing_ctx = ctx->msg_ctx;
backup_t = get_t();
backup_e2eack_t = get_e2eack_t();
backup_cancelled_t = get_cancelled_t();
/* fake transaction */
set_t( t );
set_cancelled_t(ctx->cancelled_t);
set_e2eack_t(ctx->e2eack_t);
reset_kr();
set_kr(ctx->kr);
/* make available the avp list from transaction */
backup_list = set_avp_list( &t->user_avps );
/* set default send address to the saved value */
backup_si = bind_address;
bind_address = t->uac[0].request.dst.send_sock;
async_status = ASYNC_DONE; /* assume default status as done */
/* call the resume function in order to read and handle data */
return_code = ctx->resume_f( *fd, &faked_req, ctx->resume_param );
if (async_status==ASYNC_CONTINUE) {
/* do not run the resume route */
goto restore;
} else if (async_status==ASYNC_CHANGE_FD) {
if (return_code<0) {
LM_ERR("ASYNC_CHANGE_FD: given file descriptor shall be positive!\n");
goto restore;
} else if (return_code > 0 && return_code == *fd) {
/*trying to add the same fd; shall continue*/
LM_CRIT("You are trying to replace the old fd with the same fd!"
"Will act as in ASYNC_CONTINUE!\n");
goto restore;
}
/* remove the old fd from the reactor */
reactor_del_reader( *fd, -1, IO_FD_CLOSING);
*fd=return_code;
/* insert the new fd inside the reactor */
if (reactor_add_reader( *fd, F_SCRIPT_ASYNC, RCT_PRIO_ASYNC, (void*)ctx)<0 ) {
LM_ERR("failed to add async FD to reactor -> act in sync mode\n");
do {
return_code = ctx->resume_f( *fd, &faked_req, ctx->resume_param );
if (async_status == ASYNC_CHANGE_FD)
*fd=return_code;
} while(async_status==ASYNC_CONTINUE||async_status==ASYNC_CHANGE_FD);
goto route;
}
/* changed fd; now restore old state */
goto restore;
}
/* remove from reactor, we are done */
reactor_del_reader( *fd, -1, IO_FD_CLOSING);
route:
if (async_status == ASYNC_DONE_CLOSE_FD)
close(*fd);
/* run the resume_route (some type as the original one) */
swap_route_type(route, ctx->route_type);
run_resume_route( ctx->resume_route, &faked_req);
set_route_type(route);
/* no need for the context anymore */
shm_free(ctx);
/* free also the processing ctx if still set
* NOTE: it may become null if inside the run_resume_route
* another async jump was made (and context attached again
* to transaction) */
if (current_processing_ctx) {
context_destroy(CONTEXT_GLOBAL, current_processing_ctx);
pkg_free(current_processing_ctx);
}
restore:
/* restore original environment */
set_t(backup_t);
set_cancelled_t(backup_cancelled_t);
set_e2eack_t(backup_e2eack_t);
/* restore original avp list */
set_avp_list( backup_list );
bind_address = backup_si;
free_faked_req( &faked_req, t);
current_processing_ctx = NULL;
return 0;
}
/* Continues the SIP request processing previously saved by
* t_suspend(). The script does not continue from the same
* point, but a separate route block is executed instead.
*
* Return value:
* 0 - success
* <0 - failure
*/
int t_continue(unsigned int hash_index, unsigned int label,
struct action *route)
{
struct cell *t;
struct sip_msg faked_req;
struct cancel_info cancel_data;
int branch;
struct ua_client *uac =NULL;
int ret;
int cb_type;
int msg_status;
int last_uac_status;
int reply_status;
int do_put_on_wait;
struct hdr_field *hdr, *prev = 0, *tmp = 0;
if (t_lookup_ident(&t, hash_index, label) < 0) {
LM_ERR("transaction not found\n");
return -1;
}
if (t->flags & T_CANCELED) {
/* The transaction has already been canceled,
* needless to continue */
UNREF(t); /* t_unref would kill the transaction */
/* reset T as we have no working T anymore */
set_t(T_UNDEFINED, T_BR_UNDEFINED);
return 1;
}
/* The transaction has to be locked to protect it
* form calling t_continue() multiple times simultaneously */
LOCK_ASYNC_CONTINUE(t);
t->flags |= T_ASYNC_CONTINUE; /* we can now know anywhere in kamailio
* that we are executing post a suspend */
/* which route block type were we in when we were suspended */
cb_type = FAILURE_CB_TYPE;;
switch (t->async_backup.backup_route) {
case REQUEST_ROUTE:
cb_type = FAILURE_CB_TYPE;
break;
case FAILURE_ROUTE:
cb_type = FAILURE_CB_TYPE;
break;
case TM_ONREPLY_ROUTE:
cb_type = ONREPLY_CB_TYPE;
break;
case BRANCH_ROUTE:
cb_type = FAILURE_CB_TYPE;
break;
}
if(t->async_backup.backup_route != TM_ONREPLY_ROUTE){
branch = t->async_backup.blind_uac; /* get the branch of the blind UAC setup
* during suspend */
if (branch >= 0) {
stop_rb_timers(&t->uac[branch].request);
if (t->uac[branch].last_received != 0) {
/* Either t_continue() has already been
* called or the branch has already timed out.
* Needless to continue. */
UNLOCK_ASYNC_CONTINUE(t);
UNREF(t); /* t_unref would kill the transaction */
return 1;
}
/*we really don't need this next line anymore otherwise we will
never be able to forward replies after a (t_relay) on this branch.
We want to try and treat this branch as 'normal' (as if it were a normal req, not async)' */
//t->uac[branch].last_received=500;
uac = &t->uac[branch];
}
/* else
Not a huge problem, fr timer will fire, but CANCEL
will not be sent. last_received will be set to 408. */
reset_kr();
/* fake the request and the environment, like in failure_route */
if (!fake_req(&faked_req, t->uas.request, 0 /* extra flags */, uac)) {
LM_ERR("building fake_req failed\n");
ret = -1;
goto kill_trans;
}
faked_env( t, &faked_req, 1);
/* execute the pre/post -script callbacks based on original route block */
if (exec_pre_script_cb(&faked_req, cb_type)>0) {
if (run_top_route(route, &faked_req, 0)<0)
LM_ERR("failure inside run_top_route\n");
exec_post_script_cb(&faked_req, cb_type);
}
/* TODO: save_msg_lumps should clone the lumps to shm mem */
/* restore original environment and free the fake msg */
faked_env( t, 0, 1);
free_faked_req(&faked_req, t);
/* update the flags */
t->uas.request->flags = faked_req.flags;
if (t->uas.status < 200) {
/* No final reply has been sent yet.
* Check whether or not there is any pending branch.
*/
for ( branch = 0;
branch < t->nr_of_outgoings;
branch++
) {
if (t->uac[branch].last_received < 200)
break;
}
if (branch == t->nr_of_outgoings) {
/* There is not any open branch so there is
* no chance that a final response will be received. */
ret = 0;
goto kill_trans;
}
}
} else {
branch = t->async_backup.backup_branch;
init_cancel_info(&cancel_data);
LM_DBG("continuing from a suspended reply"
" - resetting the suspend branch flag\n");
t->uac[branch].reply->msg_flags &= ~FL_RPL_SUSPENDED;
if (t->uas.request) t->uas.request->msg_flags&= ~FL_RPL_SUSPENDED;
faked_env( t, t->uac[branch].reply, 1);
if (exec_pre_script_cb(t->uac[branch].reply, cb_type)>0) {
if (run_top_route(route, t->uac[branch].reply, 0)<0){
LOG(L_ERR, "ERROR: t_continue_reply: Error in run_top_route\n");
}
exec_post_script_cb(t->uac[branch].reply, cb_type);
}
LM_DBG("restoring previous environment");
faked_env( t, 0, 1);
/*lock transaction replies - will be unlocked when reply is relayed*/
LOCK_REPLIES( t );
if ( is_local(t) ) {
LM_DBG("t is local - sending reply with status code: [%d]\n",
t->uac[branch].reply->first_line.u.reply.statuscode);
reply_status = local_reply( t, t->uac[branch].reply, branch,
t->uac[branch].reply->first_line.u.reply.statuscode,
&cancel_data );
if (reply_status == RPS_COMPLETED) {
/* no more UAC FR/RETR (if I received a 2xx, there may
* be still pending branches ...
*/
cleanup_uac_timers( t );
if (is_invite(t)) cancel_uacs(t, &cancel_data, F_CANCEL_B_KILL);
/* There is no need to call set_final_timer because we know
* that the transaction is local */
put_on_wait(t);
}else if (unlikely(cancel_data.cancel_bitmap)){
/* cancel everything, even non-INVITEs (e.g in case of 6xx), use
* cancel_b_method for canceling unreplied branches */
cancel_uacs(t, &cancel_data, cfg_get(tm,tm_cfg, cancel_b_flags));
}
} else {
LM_DBG("t is not local - relaying reply with status code: [%d]\n",
t->uac[branch].reply->first_line.u.reply.statuscode);
do_put_on_wait = 0;
if(t->uac[branch].reply->first_line.u.reply.statuscode>=200){
do_put_on_wait = 1;
}
reply_status=relay_reply( t, t->uac[branch].reply, branch,
t->uac[branch].reply->first_line.u.reply.statuscode,
&cancel_data, do_put_on_wait );
if (reply_status == RPS_COMPLETED) {
/* no more UAC FR/RETR (if I received a 2xx, there may
be still pending branches ...
*/
cleanup_uac_timers( t );
/* 2xx is a special case: we can have a COMPLETED request
* with branches still open => we have to cancel them */
if (is_invite(t) && cancel_data.cancel_bitmap)
cancel_uacs( t, &cancel_data, F_CANCEL_B_KILL);
/* FR for negative INVITES, WAIT anything else */
/* Call to set_final_timer is embedded in relay_reply to avoid
* race conditions when reply is sent out and an ACK to stop
* retransmissions comes before retransmission timer is set.*/
}else if (unlikely(cancel_data.cancel_bitmap)){
/* cancel everything, even non-INVITEs (e.g in case of 6xx), use
* cancel_b_method for canceling unreplied branches */
cancel_uacs(t, &cancel_data, cfg_get(tm,tm_cfg, cancel_b_flags));
}
}
t->uac[branch].request.flags|=F_RB_REPLIED;
if (reply_status==RPS_ERROR){
goto done;
}
/* update FR/RETR timers on provisional replies */
msg_status=t->uac[branch].reply->REPLY_STATUS;
last_uac_status=t->uac[branch].last_received;
if (is_invite(t) && msg_status<200 &&
( cfg_get(tm, tm_cfg, restart_fr_on_each_reply) ||
( (last_uac_status<msg_status) &&
((msg_status>=180) || (last_uac_status==0)) )
) ) { /* provisional now */
restart_rb_fr(& t->uac[branch].request, t->fr_inv_timeout);
t->uac[branch].request.flags|=F_RB_FR_INV; /* mark fr_inv */
}
}
done:
UNLOCK_ASYNC_CONTINUE(t);
if(t->async_backup.backup_route != TM_ONREPLY_ROUTE){
/* unref the transaction */
t_unref(t->uas.request);
} else {
tm_ctx_set_branch_index(T_BR_UNDEFINED);
/* unref the transaction */
t_unref(t->uac[branch].reply);
LOG(L_DBG,"DEBUG: t_continue_reply: Freeing earlier cloned reply\n");
/* free lumps that were added during reply processing */
del_nonshm_lump( &(t->uac[branch].reply->add_rm) );
del_nonshm_lump( &(t->uac[branch].reply->body_lumps) );
del_nonshm_lump_rpl( &(t->uac[branch].reply->reply_lump) );
/* free header's parsed structures that were added */
for( hdr=t->uac[branch].reply->headers ; hdr ; hdr=hdr->next ) {
if ( hdr->parsed && hdr_allocs_parse(hdr) &&
(hdr->parsed<(void*)t->uac[branch].reply ||
hdr->parsed>=(void*)t->uac[branch].end_reply)) {
clean_hdr_field(hdr);
hdr->parsed = 0;
}
}
/* now go through hdr_fields themselves and remove the pkg allocated space */
hdr = t->uac[branch].reply->headers;
while (hdr) {
if ( hdr && ((void*)hdr<(void*)t->uac[branch].reply ||
(void*)hdr>=(void*)t->uac[branch].end_reply)) {
//this header needs to be freed and removed form the list.
if (!prev) {
t->uac[branch].reply->headers = hdr->next;
} else {
prev->next = hdr->next;
}
tmp = hdr;
hdr = hdr->next;
pkg_free(tmp);
} else {
prev = hdr;
hdr = hdr->next;
}
}
sip_msg_free(t->uac[branch].reply);
t->uac[branch].reply = 0;
}
return 0;
kill_trans:
/* The script has hopefully set the error code. If not,
* let us reply with a default error. */
if ((kill_transaction_unsafe(t,
tm_error ? tm_error : E_UNSPEC)) <=0
) {
LOG(L_ERR, "ERROR: t_continue: "
"reply generation failed\n");
/* The transaction must be explicitely released,
* no more timer is running */
UNLOCK_ASYNC_CONTINUE(t);
t_release_transaction(t);
} else {
UNLOCK_ASYNC_CONTINUE(t);
}
if(t->async_backup.backup_route != TM_ONREPLY_ROUTE){
t_unref(t->uas.request);
} else {
/* unref the transaction */
t_unref(t->uac[branch].reply);
}
return ret;
}
/* function triggered from reactor in order to continue the processing
*/
int t_resume_async(int fd, void *param)
{
static struct sip_msg faked_req;
static struct ua_client uac;
async_ctx *ctx = (async_ctx *)param;
struct cell *backup_t;
struct usr_avp **backup_list;
struct socket_info* backup_si;
struct cell *t= ctx->t;
int route;
LM_DBG("resuming on fd %d, transaction %p \n",fd, t);
if (current_processing_ctx) {
LM_CRIT("BUG - a context already set!\n");
abort();
}
/* prepare for resume route */
uac.br_flags = getb0flags( t->uas.request ) ;
uac.uri = *GET_RURI( t->uas.request );
if (!fake_req( &faked_req /* the fake msg to be built*/,
t->uas.request, /* the template msg saved in transaction */
&t->uas, /*the UAS side of the transaction*/
&uac, /* the fake UAC */
1 /* copy dst_uri too */)
) {
LM_ERR("fake_req failed\n");
return 0;
}
/* enviroment setting */
current_processing_ctx = ctx->msg_ctx;
backup_t = get_t();
/* fake transaction */
set_t( t );
reset_kr();
set_kr(ctx->kr);
/* make available the avp list from transaction */
backup_list = set_avp_list( &t->user_avps );
/* set default send address to the saved value */
backup_si = bind_address;
bind_address = t->uac[0].request.dst.send_sock;
async_status = ASYNC_DONE; /* assume default status as done */
/* call the resume function in order to read and handle data */
return_code = ctx->resume_f( fd, &faked_req, ctx->resume_param );
if (async_status==ASYNC_CONTINUE) {
/* do not run the resume route */
goto restore;
}
/* remove from reactor, we are done */
reactor_del_reader( fd, -1, IO_FD_CLOSING);
if (async_status == ASYNC_DONE_CLOSE_FD)
close(fd);
/* run the resume_route (some type as the original one) */
swap_route_type(route, ctx->route_type);
run_resume_route( ctx->resume_route, &faked_req);
set_route_type(route);
/* no need for the context anymore */
shm_free(ctx);
restore:
/* restore original environment */
set_t(backup_t);
/* restore original avp list */
set_avp_list( backup_list );
bind_address = backup_si;
free_faked_req( &faked_req, t);
current_processing_ctx = NULL;
return 0;
}
