modules/jsonrpc-c/jsonrpc_request.c
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 /*
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  * Copyright (C) 2011 Flowroute LLC (flowroute.com)
  *
  * This file is part of Kamailio, a free SIP server.
  *
  * This file is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version
  *
  *
  * This file is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
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  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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  *
  */
 
 #include "../../mod_fix.h"
 #include "../../pvar.h"
 #include "../../lvalue.h"
 #include "../tm/tm_load.h"
 
 #include "jsonrpc_request.h"
 #include "jsonrpc_io.h"
 
 
 struct tm_binds tmb;
 static char *shm_strdup(str *src);
 
 int memory_error() {
 	LM_ERR("Out of memory!");
 	return -1;
 }
 
 int jsonrpc_request(struct sip_msg* _m, char* _method, char* _params, char* _cb_route, char* _err_route, char* _cb_pv)
 {
   str method;
   str params;
   str cb_route;
   str err_route;
 	
 
 	if (fixup_get_svalue(_m, (gparam_p)_method, &method) != 0) {
 		LM_ERR("cannot get method value\n");
 		return -1;
 	}
 	if (fixup_get_svalue(_m, (gparam_p)_params, &params) != 0) {
 		LM_ERR("cannot get params value\n");
 		return -1;
 	}
 	if (fixup_get_svalue(_m, (gparam_p)_cb_route, &cb_route) != 0) {
 		LM_ERR("cannot get cb_route value\n");
 		return -1;
 	}
 
 	if (fixup_get_svalue(_m, (gparam_p)_err_route, &err_route) != 0) {
 		LM_ERR("cannot get err_route value\n");
 		return -1;
 	}
 
 	tm_cell_t *t = 0;
 	t = tmb.t_gett();
 	if (t==NULL || t==T_UNDEFINED)
 	{
 		if(tmb.t_newtran(_m)<0)
 		{
 			LM_ERR("cannot create the transaction\n");
 			return -1;
 		}
 		t = tmb.t_gett();
 		if (t==NULL || t==T_UNDEFINED)
 		{
 			LM_ERR("cannot look up the transaction\n");
 			return -1;
 		}
 	}
 
 	unsigned int hash_index;
 	unsigned int label;
 
 	if (tmb.t_suspend(_m, &hash_index, &label) < 0) {
 		LM_ERR("t_suspend() failed\n");
 		return -1;
 	}
 
 	struct jsonrpc_pipe_cmd *cmd;
 	if (!(cmd = (struct jsonrpc_pipe_cmd *) shm_malloc(sizeof(struct jsonrpc_pipe_cmd))))
 		return memory_error();
 
 	memset(cmd, 0, sizeof(struct jsonrpc_pipe_cmd));
 
 	pv_spec_t *cb_pv = (pv_spec_t*)shm_malloc(sizeof(pv_spec_t));
 	if (!cb_pv)
 		return memory_error();
 
 	cb_pv = memcpy(cb_pv, (pv_spec_t *)_cb_pv, sizeof(pv_spec_t));
 
 	cmd->method = shm_strdup(&method);
 	cmd->params = shm_strdup(&params);
 	cmd->cb_route = shm_strdup(&cb_route);
 	cmd->err_route = shm_strdup(&err_route);
 	cmd->cb_pv = cb_pv;
 	cmd->msg = _m;
 	cmd->t_hash = hash_index;
 	cmd->t_label = label;
 	
 	if (write(cmd_pipe, &cmd, sizeof(cmd)) != sizeof(cmd)) {
 		LM_ERR("failed to write to io pipe: %s\n", strerror(errno));
 		return -1;
 	}
 
 	return 0;
 }
 
 int jsonrpc_notification(struct sip_msg* _m, char* _method, char* _params)
 {
 	str method;
 	str params;
 
 	if (fixup_get_svalue(_m, (gparam_p)_method, &method) != 0) {
 		LM_ERR("cannot get method value\n");
 		return -1;
 	}
 	if (fixup_get_svalue(_m, (gparam_p)_params, &params) != 0) {
 		LM_ERR("cannot get params value\n");
 		return -1;
 	}
 
 	struct jsonrpc_pipe_cmd *cmd;
 	if (!(cmd = (struct jsonrpc_pipe_cmd *) shm_malloc(sizeof(struct jsonrpc_pipe_cmd))))
 		return memory_error();
 
 	memset(cmd, 0, sizeof(struct jsonrpc_pipe_cmd));
 
 	cmd->method = shm_strdup(&method);
 	cmd->params = shm_strdup(&params);
 	cmd->notify_only = 1;
 
 	if (write(cmd_pipe, &cmd, sizeof(cmd)) != sizeof(cmd)) {
 		LM_ERR("failed to write to io pipe: %s\n", strerror(errno));
 		return -1;
 	}
 
 	return 1;
 }
 
 static char *shm_strdup(str *src)
 {
 	char *res;
 
 	if (!src || !src->s)
 		return NULL;
 	if (!(res = (char *) shm_malloc(src->len + 1)))
 		return NULL;
 	strncpy(res, src->s, src->len);
 	res[src->len] = 0;
 	return res;
 }