/**
* Creates a new p_dialog structure.
* Does not add the structure to the list.
* @param call_id - call-id of the dialog
* @param host - host that originates/terminates this dialog
* @param port - port that originates/terminates this dialog
* @param transport - transport that originates/terminates this dialog
* @returns the new p_dialog* on success, or NULL on error;
*/
p_dialog* new_p_dialog(str call_id,str host,int port, int transport)
{
p_dialog *d;
if (!p_dialog_count_increment()) return 0;
d = shm_malloc(sizeof(p_dialog));
if (!d) {
LOG(L_ERR,"ERR:"M_NAME":new_p_dialog(): Unable to alloc %d bytes\n",
sizeof(p_dialog));
goto error;
}
memset(d,0,sizeof(p_dialog));
d->hash = get_p_dialog_hash(call_id);
STR_SHM_DUP(d->call_id,call_id,"shm");
STR_SHM_DUP(d->host,host,"shm");
d->port = port;
d->transport = transport;
return d;
error:
out_of_memory:
if (d){
if (d->call_id.s) shm_free(d->call_id.s);
if (d->host.s) shm_free(d->host.s);
shm_free(d);
}
p_dialog_count_decrement();
return 0;
}
/**
* Finds and returns a dialog from the hash table.
* \note the table should be locked already for the call_id in the parameter
* @param call_id - call_id of the dialog
* @param dir - the direction
* @returns the p_dialog* or NULL if not found
*/
p_dialog* get_p_dialog_dir_nolock(str call_id,enum p_dialog_direction dir)
{
p_dialog *d=0;
unsigned int hash = get_p_dialog_hash(call_id);
d = p_dialogs[hash].head;
while(d){
if (d->direction == dir &&
d->call_id.len == call_id.len &&
strncasecmp(d->call_id.s,call_id.s,call_id.len)==0) {
return d;
}
d = d->next;
}
return 0;
}
/**
* Finds and returns a dialog from the hash table.
* \note Locks the hash slot if ok! Call d_unlock(p_dialog->hash) when you are finished)
* @param call_id - dialog's call_id
* @param host - host that originates/terminates this dialog
* @param port - port that originates/terminates this dialog
* @param transport - transport that originates/terminates this dialog
* @param dir - the direction of the dialog. if NULL, it doesn't matter
* \note transport is ignored.
*/
p_dialog* get_p_dialog(str call_id,str host,int port, int transport,enum p_dialog_direction *dir)
{
p_dialog *d=0;
unsigned int hash = get_p_dialog_hash(call_id);
d_lock(hash);
d = p_dialogs[hash].head;
while(d){
if ((!dir || d->direction == *dir) &&
d->port == port &&
/* d->transport == transport &&*/
/* commented because of strange behaviour */
d->host.len == host.len &&
d->call_id.len == call_id.len &&
strncasecmp(d->host.s,host.s,host.len)==0 &&
strncasecmp(d->call_id.s,call_id.s,call_id.len)==0) {
return d;
}
d = d->next;
}
d_unlock(hash);
return 0;
}
/**
* Decode a dialog from a binary data structure
* @param x - binary data to decode from
* @returns the p_dialog* where the data has been decoded
*/
p_dialog* bin_decode_p_dialog(bin_data *x)
{
p_dialog *d=0;
int len,i;
str s;
char c;
unsigned char uc;
len = sizeof(p_dialog);
d = (p_dialog*) shm_malloc(len);
if (!d) {
LOG(L_ERR,"ERR:"M_NAME":bin_decode_p_dialog: Error allocating %d bytes.\n",len);
goto error;
}
memset(d,0,len);
if (!bin_decode_str(x,&s)||!str_shm_dup(&(d->call_id),&s)) goto error;
if (!bin_decode_uchar(x, &uc)) goto error;
d->direction = uc;
if (!bin_decode_str(x,&s)||!str_shm_dup(&(d->host),&s)) goto error;
if (!bin_decode_ushort(x, &d->port)) goto error;
if (!bin_decode_uchar(x, &uc)) goto error;
d->transport = uc;
if (!bin_decode_ushort(x, &d->routes_cnt)) goto error;
len = sizeof(str)*d->routes_cnt;
d->routes = (str*) shm_malloc(len);
if (!d) {
LOG(L_ERR,"ERR:"M_NAME":bin_decode_p_dialog: Error allocating %d bytes.\n",len);
goto error;
}
memset(d->routes,0,len);
for(i=0;i<d->routes_cnt;i++)
if (!bin_decode_str(x,&s)||!str_shm_dup(d->routes+i,&s)) goto error;
if (!bin_decode_char(x, &c)) goto error;
d->method = c;
if (!bin_decode_str(x,&s)||!str_shm_dup(&(d->method_str),&s)) goto error;
if (!bin_decode_int(x, &d->first_cseq)) goto error;
if (!bin_decode_int(x, &d->last_cseq)) goto error;
if (!bin_decode_char(x, &c)) goto error;
d->state = c;
if (!bin_decode_time_t(x, &d->expires)) goto error;
if (!bin_decode_time_t(x, &d->lr_session_expires)) goto error;
if (!bin_decode_str(x,&s)||!str_shm_dup(&(d->refresher),&s)) goto error;
if (!bin_decode_uchar(x,&d->uac_supp_timer)) goto error;
if (!bin_decode_uchar(x, &d->is_releasing)) goto error;
if (!bin_decode_str(x,&s)||!str_shm_dup(&(d->pcc_session_id),&s)) goto error;
if (!bin_decode_dlg_t(x,&(d->dialog_c))) goto error;
if (!bin_decode_dlg_t(x,&(d->dialog_s))) goto error;
d->hash = get_p_dialog_hash(d->call_id);
return d;
error:
LOG(L_ERR,"ERR:"M_NAME":bin_decode_p_dialog: Error while decoding (at %d (%04x)).\n",x->max,x->max);
if (d) {
if (d->call_id.s) shm_free(d->call_id.s);
if (d->host.s) shm_free(d->host.s);
if (d->routes_cnt){
for(i=0;i<d->routes_cnt;i++)
if (d->routes[i].s) shm_free(d->routes[i].s);
shm_free(d->routes);
}
if (d->method_str.s) shm_free(d->method_str.s);
if (d->refresher.s) shm_free(d->refresher.s);
shm_free(d);
}
return 0;
}