| c00get |
12-08-2009 10:31 AM |
Thanks for the replies.
Quote:
Originally Posted by David1357
(Post 3782964)
What have you written so far? Paste your code inside CODE tags.
|
Code:
#include <stdlib.h>
#include <syslog.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#define PORT 81
#define MAXBUF 64
#define SLEEP_TIME 3
#define COUNT_MAX 3
int main(void)
{
pid_t pid, sid;
int status;
/* Fork off the parent process */
pid = fork();
if (pid < 0)
{
syslog(LOG_ERR, "fork(): %m");
exit(EXIT_FAILURE);
}
/* If we got a good PID, then
we can exit the parent process. */
if (pid > 0)
{
exit(EXIT_SUCCESS);
}
/* Change the file mode mask */
umask(0);
/* Create a new SID for the child process */
sid = setsid();
if (sid < 0)
{
syslog(LOG_ERR, "setsid(): %m");
exit(EXIT_FAILURE);
}
/* Change the current working directory */
if ((chdir("/")) < 0)
{
syslog(LOG_ERR, "chdir(): %m");
exit(EXIT_FAILURE);
}
/* Close out the standard file descriptors */
status = close(STDIN_FILENO);
if (status < 0)
{
syslog(LOG_ERR, "close(STDIN_FILENO): %m");
exit(EXIT_FAILURE);
}
status = close(STDOUT_FILENO);
if (status < 0)
{
syslog(LOG_ERR, "close(STDOUT_FILENO): %m");
exit(EXIT_FAILURE);
}
status = close(STDERR_FILENO);
if (status < 0)
{
syslog(LOG_ERR, "close(STDERR_FILENO): %m");
exit(EXIT_FAILURE);
}
//---------------------------------------------------------------------------
int sockfd, clientfd;
struct sockaddr_in self, client_addr;
int addrlen = sizeof(client_addr);
char buffer[MAXBUF], command[8], param[8];
int count;
/* Create streaming socket */
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
{
syslog(LOG_ERR, "socket(): %m");
exit(EXIT_FAILURE);
}
/* Initialize address/port structure */
bzero(&self, sizeof(self));
self.sin_family = AF_INET;
self.sin_port = htons(PORT);
self.sin_addr.s_addr = INADDR_ANY;
/* Assign a port number to the socket */
status = bind(sockfd, (struct sockaddr*) &self, sizeof(self));
if (status < 0)
{
syslog(LOG_ERR, "bind(): %m");
exit(EXIT_FAILURE);
}
/* Make it a "listening socket" */
status = listen(sockfd, 20);
if (status < 0)
{
syslog(LOG_ERR, "listen(): %m");
exit(EXIT_FAILURE);
}
/* The Big Loop */
while (1)
{
/* Accept a connection (creating a data pipe) */
count = COUNT_MAX;
do {
clientfd = accept(sockfd, (struct sockaddr*) &client_addr, &addrlen);
if (clientfd < 0)
{
syslog(LOG_ERR, "accept(): %m");
count--;
sleep(SLEEP_TIME); // Wait
}
} while (status < 0 && count > 0);
if (count <= 0)
exit(EXIT_FAILURE);
/* Receive message */
status = recv(clientfd, buffer, MAXBUF, 0);
if (status < 0)
syslog(LOG_ERR, "recv(): %m");
else if (status > 0)
{
}
/* Close data connection */
count = COUNT_MAX;
do {
status = close(clientfd);
if (status < 0)
{
syslog(LOG_ERR, "close(clientfd): %m");
count--;
sleep(SLEEP_TIME); // Wait
}
} while (status < 0 && count > 0);
if (count <= 0)
exit(EXIT_FAILURE);
}
/* Clean up */
count = COUNT_MAX;
do {
status = close(sockfd);
if (status < 0)
{
syslog(LOG_ERR, "close(sockfd): %m");
count--;
sleep(SLEEP_TIME); // Wait
}
} while (status < 0 && count > 0);
if (count <= 0)
exit(EXIT_FAILURE);
/* Everything went well */
exit(EXIT_SUCCESS);
}
Thanks theNbomr, I'll try that. |
