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#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <linux/un.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <syslog.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
static char json_sockpath[UNIX_PATH_MAX] = "/tmp/ndpid-collector.sock";
static char serv_listen_addr[INET6_ADDRSTRLEN] = "127.0.0.1";
static uint16_t serv_listen_port = 7000;
static int json_sockfd;
static int serv_sockfd;
static int create_listen_sockets(void)
{
json_sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
serv_sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (json_sockfd < 0 || serv_sockfd < 0)
{
syslog(LOG_DAEMON | LOG_ERR, "Error opening socket: %s", strerror(errno));
return 1;
}
// This helps avoid spurious EADDRINUSE when the previous instance of this
// server died.
int opt = 1;
if (setsockopt(json_sockfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0 ||
setsockopt(serv_sockfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0)
{
syslog(LOG_DAEMON | LOG_ERR, "setsockopt with SO_REUSEADDR failed: %s", strerror(errno));
return 1;
}
struct sockaddr_un json_addr;
json_addr.sun_family = AF_UNIX;
if (snprintf(json_addr.sun_path, sizeof(json_addr.sun_path), "%s", json_sockpath) <= 0)
{
syslog(LOG_DAEMON | LOG_ERR, "snprintf failed: %s", strerror(errno));
return 1;
}
struct sockaddr_in serv_addr;
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(serv_listen_port);
if (inet_ntop(AF_INET, &serv_addr.sin_addr, &serv_listen_addr[0], INET_ADDRSTRLEN) == NULL)
{
syslog(LOG_DAEMON | LOG_ERR, "Error converting an internet address: %s", strerror(errno));
return 1;
}
if (bind(json_sockfd, (struct sockaddr *)&json_addr, sizeof(json_addr)) < 0)
{
syslog(LOG_DAEMON | LOG_ERR, "Error on binding a JSON socket: %s", strerror(errno));
return 1;
}
if (bind(serv_sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
{
syslog(LOG_DAEMON | LOG_ERR, "Error on binding the INET socket: %s", strerror(errno));
return 1;
}
if (listen(json_sockfd, 16) < 0 || listen(serv_sockfd, 16) < 0)
{
syslog(LOG_DAEMON | LOG_ERR, "Error on listen: %s", strerror(errno));
return 1;
}
return 0;
}
int main(void)
{
openlog("nDPIsrvd", LOG_CONS | LOG_PERROR, LOG_DAEMON);
if (create_listen_sockets() != 0)
{
return 1;
}
getchar();
close(json_sockfd);
close(serv_sockfd);
unlink(json_sockpath);
return 0;
}
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