/*Actions are composed as follows:
* (the action length and type as always= 5 bytes)
* 4:uac_id
*
* int request(str* method, str* req_uri, str* to, str* from, str* headers, str* body, transaction_cb c, void* cp)
* TODO performance speedup: instead of using
* dynamically allocated memory for headers,body,totag,reason and my_msg
* use static buffers.
*
*/
int ac_uac_req(as_p the_as,unsigned char processor_id,unsigned int flags,char *action,int len)
{
unsigned int cseq;
char err_buf[MAX_REASON_LEN];
struct sip_msg *my_msg;
struct to_body *fb,*tb;
struct cseq_body *cseqb;
struct as_uac_param *the_param;
dlg_t *my_dlg;
int k,retval,uac_id,sip_error,ret,err_ret;
long clen;
str headers,body,fake_uri;
uac_req_t uac_r;
headers.s=body.s=fake_uri.s=NULL;
my_dlg=NULL;
my_msg=NULL;
the_param=NULL;
k=clen=0;
net2hostL(uac_id,action,k);
if(!(headers.s=pkg_malloc(MAX_HEADER))){
LM_ERR("Out of Memory!!");
goto error;
}
headers.len=0;
LM_DBG("Action UAC Message: uac_id:%d processor_id=%d\n",uac_id,processor_id);
if (!(my_msg = parse_ac_msg(HDR_EOH_F,action+k,len-k))) {
LM_ERR("out of memory!\n");
goto error;
}
if(my_msg->first_line.type==SIP_REPLY){
LM_ERR("trying to create a UAC with a SIP response!!\n");
goto error;
}
if(parse_headers(my_msg,HDR_EOH_F,0)==-1){
LM_ERR("ERROR:seas:ac_uac_req:parsing headers\n");
goto error;
}
if(parse_from_header(my_msg)<0){
LM_ERR("parsing from header ! \n");
goto error;
}
if(check_transaction_quadruple(my_msg)==0){
as_action_fail_resp(uac_id,SE_UAC,"Headers missing (to,from,call-id,cseq)?",0);
LM_ERR("Headers missing (to,from,call-id,cseq)?");
goto error;
}
if(!(get_from(my_msg)) || !(get_from(my_msg)->tag_value.s) ||
!(get_from(my_msg)->tag_value.len)){
as_action_fail_resp(uac_id,SE_UAC,"From tag missing",0);
LM_ERR("From tag missing");
goto error;
}
fb=my_msg->from->parsed;
tb=my_msg->to->parsed;
cseqb=my_msg->cseq->parsed;
if(0!=(str2int(&cseqb->number,&cseq))){
LM_DBG("unable to parse CSeq\n");
goto error;
}
if(my_msg->first_line.u.request.method_value != METHOD_ACK &&
my_msg->first_line.u.request.method_value != METHOD_CANCEL) {
/** we trick req_within */
cseq--;
}
if(seas_f.tmb.new_dlg_uac(&(my_msg->callid->body),&(fb->tag_value),cseq,\
&(fb->uri),&(tb->uri),&my_dlg) < 0) {
as_action_fail_resp(uac_id,SE_UAC,"Error creating new dialog",0);
LM_ERR("Error while creating new dialog\n");
goto error;
}
if(seas_f.tmb.dlg_add_extra(my_dlg,&(fb->display),&(tb->display)) < 0 ) {
as_action_fail_resp(uac_id,SE_UAC,
"Error adding the display names to the new dialog",0);
LM_ERR("failed to add display names to the new dialog\n");
goto error;
}
if(tb->tag_value.s && tb->tag_value.len)
shm_str_dup(&my_dlg->id.rem_tag,&tb->tag_value);
/**Awful hack: to be able to set our own CSeq, from_tag and call-ID we have
* to use req_within instead of req_outside (it sets it's own CSeq,Call-ID
* and ftag), so we have to simulate that the dialog is already in completed
* state so...
*/
server_signature=0;
my_dlg->state = DLG_CONFIRMED;
if(0>(headers.len=extract_allowed_headers(my_msg,1,-1,HDR_CONTENTLENGTH_F|HDR_ROUTE_F|HDR_TO_F|HDR_FROM_F|HDR_CALLID_F|HDR_CSEQ_F,headers.s,MAX_HEADER))) {
LM_ERR("Unable to extract allowed headers!!\n");
goto error;
}
headers.s[headers.len]=0;
/*let's get the body*/
if(my_msg->content_length)
clen=(long)get_content_length(my_msg);
if(clen!=0){
if(!(body.s=pkg_malloc(clen))){
LM_ERR("Out of Memory!");
goto error;
}
memcpy(body.s,get_body(my_msg),clen);
body.len=clen;
body.s[clen]=0;
LM_DBG("Trying to construct a Sip Request with: body:%d[%.*s] headers:%d[%.*s]\n",\
body.len,body.len,body.s,headers.len,headers.len,headers.s);
/*t_reply_with_body un-ref-counts the transaction, so dont use it anymore*/
}else{
body.s=NULL;
body.len=0;
}
/*Now... create the UAC !!
* it would be great to know the hash_index and the label that have been assigned
* to our newly created cell, but t_uac does not leave any way for us to know...
* only that when that transaction transitions its state (ie. a response is received,
* a timeout is reached, etc...) the callback will be called with the given parameter.
*
* So the only way we have to know who we are, is passing as a parameter a structure with
* 2 pointers: one to the app_server and the other, the identifier of the UAC (uac_id).
*
*/
if(!(the_param=shm_malloc(sizeof(struct as_uac_param)))){
LM_ERR("out of shared memory\n");
goto error;
}
the_param->who=my_as;
the_param->uac_id=uac_id;
the_param->processor_id=processor_id;
the_param->destroy_cb_set=0;
shm_str_dup(&my_dlg->rem_target,&my_msg->first_line.u.request.uri);
if (my_msg->route) {
if (parse_rr(my_msg->route) < 0) {
LM_ERR( "Error while parsing Route body\n");
goto error;
}
/* TODO route_set should be a shm copy of my_msg->route->parsed */
my_dlg->route_set=(rr_t*)my_msg->route->parsed;
/** this SHOULD be:
shm_duplicate_rr(&my_dlg->route_set,my_msg->route->parsed);
* but it will last more...
*/
}
calculate_hooks(my_dlg);
if(flags & SPIRAL_FLAG){
memcpy(headers.s+headers.len,SPIRAL_HDR CRLF,SPIRAL_HDR_LEN + CRLF_LEN);
headers.len+=SPIRAL_HDR_LEN+CRLF_LEN;
headers.s[headers.len]=0;
fake_uri.s=pkg_malloc(200);
fake_uri.len=print_local_uri(the_as,processor_id,fake_uri.s,200);
if(fake_uri.len<0){
LM_ERR("printing local uri\n");
goto error;
}
my_dlg->hooks.next_hop=&fake_uri;
}
/* Kamailio and OpenSIPs seem to have diverged quite a bit on flags and events
notified to UACs. Let's see if kamailio gets it right by now, if not
this is a TODO: check PASS_PROVISIONAL
my_dlg->T_flags=T_NO_AUTO_ACK|T_PASS_PROVISIONAL_FLAG ;
this is the same as (TMCB_DONT_ACK|TMCB_LOCAL_RESPONSE_OUT) in Kamailio
*/
set_uac_req(&uac_r, &(my_msg->first_line.u.request.method), &headers,
&body, my_dlg,TMCB_DONT_ACK|TMCB_LOCAL_RESPONSE_OUT, uac_cb,
(void*)the_param);
ret=seas_f.tmb.t_request_within(&uac_r);
/** now undo all the fakes we have put in my_dlg*/
/*because my_dlg->route_set should be shm but we fake it (its pkg_mem)*/
my_dlg->route_set=(rr_t *)0;
if (ret < 0) {
err_ret = err2reason_phrase(ret,&sip_error,err_buf, sizeof(err_buf), "SEAS/UAC");
LM_ERR("failed to send the [%.*s] request\n",uac_r.method->len,uac_r.method->s);
LM_ERR("Error on request_within %s\n",err_buf );
if(err_ret > 0) {
as_action_fail_resp(uac_id,ret,err_buf,0);
}else{
as_action_fail_resp(uac_id,E_UNSPEC,"500 SEAS/UAC error",0);
}
goto error;
}
retval=0;
goto exit;
error:
retval = -1;
if(the_param)
shm_free(the_param);
exit:
seas_f.tmb.free_dlg(my_dlg);
if(headers.s)
pkg_free(headers.s);
if(body.s)
pkg_free(body.s);
if(fake_uri.s)
pkg_free(fake_uri.s);
if(my_msg){
if(my_msg->headers)
free_hdr_field_lst(my_msg->headers);
pkg_free(my_msg);
}
return retval;
}
int ac_cancel(as_p the_as,unsigned char processor_id,unsigned int flags,char *action,int len)
{
unsigned int ret,cancelled_hashIdx,cancelled_label,i;
struct sip_msg *my_msg;
struct as_uac_param *the_param;
struct cell* t_invite;
int k,retval,uac_id;
str headers,body;
body.s=headers.s=NULL;
my_msg=NULL;
the_param=NULL;
i=k=0;
net2hostL(uac_id,action,k);
net2hostL(cancelled_hashIdx,action,k);
net2hostL(cancelled_label,action,k);
if(!(headers.s=pkg_malloc(MAX_HEADER))){
LM_ERR("Out of Memory!!");
goto error;
}
headers.len=0;
if(!(my_msg=pkg_malloc(sizeof(struct sip_msg)))){
LM_ERR("out of memory!\n");
goto error;
}
memset(my_msg,0,sizeof(struct sip_msg));
my_msg->buf=action+k;
my_msg->len=len-k;
LM_DBG("Action UAC Message: uac_id:%d processor_id=%d, message:[%.*s]\n",
uac_id,processor_id,len-4,&action[4]);
if(parse_msg(action+k,len-k,my_msg)<0){
LM_ERR("parsing sip_msg");
goto error;
}
if(my_msg->first_line.type==SIP_REPLY){
LM_ERR("trying to create a UAC with a SIP response!!\n");
goto error;
}
if(parse_headers(my_msg,HDR_EOH_F,0)==-1){
LM_ERR("parsing headers\n");
goto error;
}
if(0>(headers.len=extract_allowed_headers(my_msg,1,-1,HDR_CONTENTLENGTH_F|HDR_ROUTE_F|HDR_TO_F|HDR_FROM_F|HDR_CALLID_F|HDR_CSEQ_F,headers.s,MAX_HEADER))) {
LM_ERR("Unable to extract allowed headers!!\n");
goto error;
}
if(flags & SPIRAL_FLAG){
memcpy(headers.s+headers.len,SPIRAL_HDR CRLF,SPIRAL_HDR_LEN + CRLF_LEN);
headers.len+=SPIRAL_HDR_LEN+CRLF_LEN;
/*headers.s[headers.len]=0;
fake_uri.s=pkg_malloc(200);
fake_uri.len=print_local_uri(the_as,processor_id,fake_uri.s,200);
if(fake_uri.len<0){
SLM_ERR("printing local uri\n");
goto error;
}
my_dlg->hooks.next_hop=&fake_uri;*/
}
headers.s[headers.len]=0;
/*let's get the body*/
i=(unsigned int)get_content_length(my_msg);
if(i!=0){
if(!(body.s=pkg_malloc(i))){
LM_ERR("Out of Memory!");
goto error;
}
memcpy(body.s,get_body(my_msg),i);
body.len=i;
LM_DBG("Trying to construct a Sip Request with: body:%d[%s]"
" headers:%d[%s]\n", body.len,body.s,headers.len,headers.s);
}else{
body.s=NULL;
body.len=0;
}
if(!(the_param=shm_malloc(sizeof(struct as_uac_param)))){
LM_ERR("no more share memory\n");
goto error;
}
if(seas_f.tmb.t_lookup_ident(&t_invite,cancelled_hashIdx,cancelled_label)<0){
LM_ERR("failed to t_lookup_ident hash_idx=%d,"
"label=%d\n", cancelled_hashIdx,cancelled_label);
goto error;
}
seas_f.tmb.unref_cell(t_invite);
the_param->who=my_as;
the_param->uac_id=uac_id;
the_param->processor_id=processor_id;
the_param->destroy_cb_set=0;
/* registers TMCB_RESPONSE_IN|TMCB_LOCAL_COMPLETED tm callbacks */
ret=seas_f.tmb.t_cancel_uac(&headers,&body,cancelled_hashIdx,cancelled_label,uac_cb,(void*)the_param);
if (ret == 0) {
LM_ERR( "t_cancel_uac failed\n");
as_action_fail_resp(uac_id,SE_CANCEL,SE_CANCEL_MSG,SE_CANCEL_MSG_LEN);
goto error;
}else{
the_param->label=ret;
}
seas_f.tmb.unref_cell(t_invite);
retval=0;
goto exit;
error:
retval = -1;
if(the_param)
shm_free(the_param);
exit:
if(headers.s)
pkg_free(headers.s);
if(body.s)
pkg_free(headers.s);
if(my_msg){
if(my_msg->headers)
free_hdr_field_lst(my_msg->headers);
pkg_free(my_msg);
}
return retval;
}
/**
* ac_reply: UAS transaction Reply action. It replies to an incoming request with a response.
* @param the_as The App Server that sent this action.
* @param action action
* @param len length
*
* function description
*
* Returns: what
*/
int ac_reply(as_p the_as,unsigned char processor_id,unsigned int flags,char *action,int len)
{
unsigned int hash_index,label,contentlength;
struct cell *c=NULL;
struct sip_msg *my_msg;
struct to_body *tb;
str new_header,body,totag;
char *ttag;
int i,k,retval;
static char headers[MAX_HEADER];
struct as_uac_param *the_param;
contentlength=0;
ttag=NULL;
my_msg=NULL;
i=k=0;
the_param=NULL;
net2hostL(hash_index,action,k);
net2hostL(label,action,k);
if(seas_f.tmb.t_lookup_ident(&c,hash_index,label)<0){
LM_ERR("Failed to t_lookup_ident hash_idx=%d,label=%d\n",hash_index,label);
goto error;
}
if(use_stats)
action_stat(c);
if(c->uas.status>=200){
LM_ERR("ac_reply: trying to reply to a \"%.*s\" transaction"
"that is already in completed state\n",REQ_LINE(c->uas.request).method.len,REQ_LINE(c->uas.request).method.s);
goto error;
}
if (!(my_msg=parse_ac_msg(HDR_EOH_F,action+k,len-k))) {
LM_ERR("Failed to parse_ac_msg hash_idx=%d,label=%d\n",hash_index,label);
goto error;
}
tb=(struct to_body*)my_msg->to->parsed;
if(tb->tag_value.s && tb->tag_value.len){
totag=tb->tag_value;
}else{
totag.s=NULL;
totag.len=0;
/*if(!(ttag=pkg_malloc(TOTAG_VALUE_LEN))){
LM_ERR("Out of memory !!!\n");
goto error;
}
totag.s=ttag;
calc_crc_suffix(c->uas.request,seas_tag_suffix);
LM_DBG("seas_tags = %.*s\n",TOTAG_VALUE_LEN,seas_tags);
memcpy(totag.s,seas_tags,TOTAG_VALUE_LEN);
totag.len=TOTAG_VALUE_LEN;*/
}
LM_DBG("Using totag=[%.*s]\n",totag.len,totag.s);
if(my_msg->content_length)
contentlength=(unsigned int)(long)my_msg->content_length->parsed;
if(0>(i=recordroute_diff(c->uas.request,my_msg))){/*not likely..*/
LM_DBG("Seems that request had more RecordRoutes than response...\n");
/* This prevents host->proxy->host from working. TODO review recordroute_diff code.
goto error; */
}else
LM_DBG("Recordroute Diff = %d\n",i);
if(0>(i=extract_allowed_headers(my_msg,0,i,HDR_VIA_F|HDR_TO_F|HDR_FROM_F|HDR_CSEQ_F|HDR_CALLID_F|HDR_CONTENTLENGTH_F,headers,MAX_HEADER))){
LM_ERR("ac_reply() filtering headers !\n");
goto error;
}
headers[i]=0;
new_header.s=headers;
new_header.len=i;
/* If it is INVITE and response is success (>=200 && <300), we mark it as local so that
* SER does NOT retransmit the final response (by default, SER retransmit local UAS final
* responses...*/
if(is_invite(c) && my_msg->first_line.u.reply.statuscode>=200 && my_msg->first_line.u.reply.statuscode<300){
c->flags |= T_IS_LOCAL_FLAG;
if(!(the_param=shm_malloc(sizeof(struct as_uac_param)))){
LM_ERR("no more share memory\n");
goto error;
}
the_param->processor_id=processor_id;
the_param->who=my_as;
the_param->destroy_cb_set=0;
if (seas_f.tmb.register_tmcb( 0, c, TMCB_E2EACK_IN,uas_e2e_ack_cb, the_param,¶m_free)<=0) {
LM_ERR("cannot register additional callbacks\n");
goto error;
}
}
/*WARNING casting unsigned int to int*/
body.len=contentlength;
body.s=get_body(my_msg);
LM_DBG("Trying to construct a SipReply with: ReasonPhrase:[%.*s] body:[%.*s] headers:[%.*s] totag:[%.*s]\n",\
my_msg->first_line.u.reply.reason.len,my_msg->first_line.u.reply.reason.s,\
body.len,body.s,new_header.len,new_header.s,totag.len,totag.s);
/* t_reply_with_body un-ref-counts the transaction, so dont use it anymore*/
if(seas_f.tmb.t_reply_with_body(c,my_msg->first_line.u.reply.statuscode,&(my_msg->first_line.u.reply.reason),&body,&new_header,&totag)<0){
LM_ERR("Failed to t_reply\n");
goto error;
}
retval=0;
goto exit;
error:
retval = -1;
if(c)
seas_f.tmb.unref_cell(c);
if(the_param)
shm_free(the_param);
exit:
if(ttag)
pkg_free(ttag);
if(my_msg){
free_sip_msg_lite(my_msg);
pkg_free(my_msg);
}
return retval;
}
/**
* ac_reply: UAS transaction Reply action. It replies to an incoming request with a response.
* @param the_as The App Server that sent this action.
* @param action action
* @param len length
*
* function description
*
* Returns: what
*/
int ac_reply(as_p the_as,char *action,int len)
{
unsigned int flags,hash_index,label;
struct cell *c;
struct sip_msg *my_msg;
struct to_body *tb;
str new_header,body,totag;
char *ttag;
int i,k,retval;
static char headers[MAX_HEADER];
ttag=NULL;
my_msg=NULL;
i=k=0;
net2hostL(flags,action,k);
net2hostL(hash_index,action,k);
net2hostL(label,action,k);
if(seas_f.tmb.t_lookup_ident(&c,hash_index,label)<0){
LM_ERR("Failed to t_lookup_ident hash_idx=%d,label=%d\n",hash_index,label);
goto error;
}
if(use_stats)
action_stat(c);
if(c->uas.status>=200){
LM_ERR("ac_reply: trying to reply to a \"%.*s\" transaction"
"that is already in completed state\n",REQ_LINE(c->uas.request).method.len,REQ_LINE(c->uas.request).method.s);
goto error;
}
if (!(my_msg=parse_ac_msg(HDR_EOH_F,action+k,len-k))) {
LM_ERR("Failed to parse_ac_msg hash_idx=%d,label=%d\n",hash_index,label);
goto error;
}
tb=(struct to_body*)my_msg->to->parsed;
if(tb->tag_value.s && tb->tag_value.len){
totag=tb->tag_value;
}else{
totag.s=NULL;
totag.len=0;
/*if(!(ttag=pkg_malloc(TOTAG_VALUE_LEN))){
LM_ERR("Out of memory !!!\n");
goto error;
}
totag.s=ttag;
calc_crc_suffix(c->uas.request,seas_tag_suffix);
LM_DBG("seas_tags = %.*s\n",TOTAG_VALUE_LEN,seas_tags);
memcpy(totag.s,seas_tags,TOTAG_VALUE_LEN);
totag.len=TOTAG_VALUE_LEN;*/
}
LM_DBG("Using totag=[%.*s]\n",totag.len,totag.s);
if(0>(i=recordroute_diff(c->uas.request,my_msg))){/*not likely..*/
LM_DBG("Seems that request had more RecordRoutes than response...\n");
goto error;
}else
LM_DBG("Recordroute Diff = %d\n",i);
if(0>(i=extract_allowed_headers(my_msg,0,i,HDR_VIA_F|HDR_TO_F|HDR_FROM_F|HDR_CSEQ_F|HDR_CALLID_F|HDR_CONTENTLENGTH_F,headers,MAX_HEADER))){
LM_ERR("ac_reply() filtering headers !\n");
goto error;
}
headers[i]=0;
new_header.s=headers;
new_header.len=i;
/* If it is INVITE and response is success (>=200 && <300), we mark it as local so that
* SER does NOT retransmit the final response (by default, SER retransmit local UAS final
* responses...*/
if(is_invite(c) && my_msg->first_line.u.reply.statuscode>=200 && my_msg->first_line.u.reply.statuscode<300)
c->flags |= T_IS_LOCAL_FLAG;
/*WARNING casting unsigned int to int*/
get_body(my_msg, &body);
LM_DBG("Trying to construct a SipReply with: ReasonPhrase:[%.*s] body:[%.*s] headers:[%.*s] totag:[%.*s]\n",\
my_msg->first_line.u.reply.reason.len,my_msg->first_line.u.reply.reason.s,\
body.len,body.s,new_header.len,new_header.s,totag.len,totag.s);
if(seas_f.tmb.t_reply_with_body(c,my_msg->first_line.u.reply.statuscode,
&(my_msg->first_line.u.reply.reason),&body,&new_header,&totag)<0){
LM_ERR("Failed to t_reply\n");
goto error;
}
seas_f.tmb.unref_cell(c);
retval=0;
goto exit;
error:
retval = -1;
seas_f.tmb.unref_cell(c);
exit:
if(ttag)
pkg_free(ttag);
if(my_msg){
free_sip_msg_lite(my_msg);
pkg_free(my_msg);
}
return retval;
}
