Skip to content

Instantly share code, notes, and snippets.

/gist:2843348

Created May 31, 2012
Embed
What would you like to do?
Server example
#include <stdio.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netinet/in.h>
#define MAXPENDING 5
#define BUFFSIZE 32
void Die(char *mess) { perror(mess); exit(1); }
void HandleClient(int sock)
{
char buffer[BUFFSIZE];
int received = -1;
if ((received = recv(sock, buffer, BUFFSIZE, 0)) < 0)
{
Die("Failed to receive initial bytes from client");
}
while (received > 0)
{
if (send(sock, buffer, received, 0) != received)
{
Die ("Failed to send bytes to client");
}
if ((received = recv(sock, buffer, BUFFSIZE, 0)) < 0)
{
Die("Failed to receive additional bytes from client");
}
close(sock);
}
}
int main(int argc, char *argv[])
{
int serversock, clientsock;
struct sockaddr_in echoserver, echoclient;
if (argc != 2)
{
fprintf(stderr, "USAGE: server <port>\n");
exit(1);
}
if ((serversock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
{
Die("Failed to create socket");
}
memset(&echoserver, 0, sizeof(echoserver));
echoserver.sin_family = AF_INET;
echoserver.sin_addr.s_addr = htonl(INADDR_ANY);
echoserver.sin_port = htons(atoi(argv[1]));
if (bind(serversock, (struct sockaddr *) &echoserver, sizeof(echoserver)) < 0)
{
Die("Failed to bind the server socket");
}
if (listen(serversock, MAXPENDING) < 0)
{
Die("Failed to listen on server socket");
}
while (1)
{
unsigned int clientlen = sizeof(echoclient);
if ((clientsock = accept(serversock, (struct sockaddr *) &echoclient, &clientlen)) < 0)
{
Die("Failed to accept client connection");
}
fprintf(stdout, "Client connected: %s\n", inet_ntoa(echoclient.sin_addr));
HandleClient(clientsock);
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.