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/*
* Ouroboros - Copyright (C) 2016 - 2017
*
* The sockets layer to communicate between daemons
*
* Sander Vrijders <sander.vrijders@intec.ugent.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include <ouroboros/config.h>
#include <ouroboros/errno.h>
#include <ouroboros/sockets.h>
#include <ouroboros/utils.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <stdbool.h>
#include <sys/time.h>
int client_socket_open(char * file_name)
{
int sockfd;
struct sockaddr_un serv_addr;
sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
if (sockfd < 0)
return -1;
serv_addr.sun_family = AF_UNIX;
sprintf(serv_addr.sun_path, "%s", file_name);
if (connect(sockfd,
(struct sockaddr *) &serv_addr,
sizeof(serv_addr))) {
close(sockfd);
return -1;
}
return sockfd;
}
int server_socket_open(char * file_name)
{
int sockfd;
struct sockaddr_un serv_addr;
if (access(file_name, F_OK) != -1) {
/* File exists */
if (unlink(file_name))
return -1;
}
sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
if (sockfd < 0)
return -1;
serv_addr.sun_family = AF_UNIX;
sprintf(serv_addr.sun_path, "%s", file_name);
if (bind(sockfd,
(struct sockaddr *) &serv_addr,
sizeof(serv_addr))) {
close(sockfd);
return -1;
}
if (listen(sockfd, 0)) {
close(sockfd);
return -1;
}
return sockfd;
}
static void close_ptr(void * o)
{
close(*(int *) o);
}
static irm_msg_t * send_recv_irm_msg_timed(irm_msg_t * msg, bool timed)
{
int sockfd;
buffer_t buf;
ssize_t count = 0;
irm_msg_t * recv_msg = NULL;
struct timeval tv = {(SOCKET_TIMEOUT / 1000),
(SOCKET_TIMEOUT % 1000) * 1000};
sockfd = client_socket_open(IRM_SOCK_PATH);
if (sockfd < 0)
return NULL;
if (timed)
setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO,
(void *) &tv, sizeof(tv));
buf.len = irm_msg__get_packed_size(msg);
if (buf.len == 0) {
close(sockfd);
return NULL;
}
buf.data = malloc(IRM_MSG_BUF_SIZE);
if (buf.data == NULL) {
close(sockfd);
return NULL;
}
pthread_cleanup_push(close_ptr, &sockfd);
pthread_cleanup_push((void (*)(void *)) free, (void *) buf.data);
irm_msg__pack(msg, buf.data);
if (write(sockfd, buf.data, buf.len) != -1)
count = read(sockfd, buf.data, IRM_MSG_BUF_SIZE);
if (count > 0)
recv_msg = irm_msg__unpack(NULL, count, buf.data);
pthread_cleanup_pop(true);
pthread_cleanup_pop(true);
return recv_msg;
}
irm_msg_t * send_recv_irm_msg(irm_msg_t * msg)
{ return send_recv_irm_msg_timed(msg, true); }
irm_msg_t * send_recv_irm_msg_b(irm_msg_t * msg)
{ return send_recv_irm_msg_timed(msg, false); }
char * ipcp_sock_path(pid_t api)
{
char * full_name = NULL;
char * api_string = NULL;
size_t len = 0;
char * delim = "_";
len = n_digits(api);
api_string = malloc(len + 1);
if (api_string == NULL)
return NULL;
sprintf(api_string, "%d", api);
len += strlen(IPCP_SOCK_PATH_PREFIX);
len += strlen(delim);
len += strlen(SOCK_PATH_SUFFIX);
full_name = malloc(len + 1);
if (full_name == NULL) {
free(api_string);
return NULL;
}
strcpy(full_name, IPCP_SOCK_PATH_PREFIX);
strcat(full_name, delim);
strcat(full_name, api_string);
strcat(full_name, SOCK_PATH_SUFFIX);
free(api_string);
return full_name;
}
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