Attachment 748281 Details for Bug 880698 – Uli Drepper's server example code, hacked up slightly by me

Uli Drepper's server example code, hacked up slightly by me

drepper-srv.c (text/x-csrc), 2.39 KB, created by Markus Armbruster on 2013-05-15 13:08:24 UTC

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Creator: Markus Armbruster

Created: 2013-05-15 13:08:24 UTC

Size: 2.39 KB

patch

obsolete

>#include <error.h>
>#include <errno.h>
>#include <netdb.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <unistd.h>
>#include <netinet/in.h>
>#include <sys/poll.h>
>#include <arpa/inet.h>
>
>int
>main (int argc, char *argv[])
>{
>    struct addrinfo *ai;
>    struct addrinfo hints;
>    memset (&hints, '\0', sizeof (hints));
>    hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
>    hints.ai_socktype = SOCK_STREAM;
>    int e = getaddrinfo (NULL, "4567", &hints, &ai);
>    if (e != 0)
>	error (EXIT_FAILURE, 0, "getaddrinfo: %s", gai_strerror (e));
>    int nfds = 0;
>    struct addrinfo *runp = ai;
>    while (runp != NULL)
>    {
>	++nfds;
>	runp = runp->ai_next;
>    }
>    struct pollfd fds[nfds];
>    for (nfds = 0, runp = ai; runp != NULL; runp = runp->ai_next)
>    {
>	char addrbuf[46];
>	printf("Trying %s\n",
>	       inet_ntop(runp->ai_family,
>			 runp->ai_family == AF_INET
>			 ? (void *)&((struct sockaddr_in *)runp->ai_addr)->sin_addr
>			 : (void *)&((struct sockaddr_in6 *)runp->ai_addr)->sin6_addr,
>			 addrbuf, sizeof(addrbuf)));
>	fds[nfds].fd = socket (runp->ai_family, runp->ai_socktype, runp->ai_protocol);
>	if (fds[nfds].fd == -1)
>	    error (EXIT_FAILURE, errno, "socket");
>	fds[nfds].events = POLLIN;
>	int opt = 1;
>	setsockopt (fds[nfds].fd, SOL_SOCKET, SO_REUSEADDR,
>		    &opt, sizeof (opt));
>
>	if (bind (fds[nfds].fd,
>		  runp->ai_addr, runp->ai_addrlen) != 0)
>	{
>	    if (errno != EADDRINUSE)
>		error (EXIT_FAILURE, errno, "bind");
>	    else
>		error (0, errno, "bind");
>	    close (fds[nfds].fd);
>	}
>	else
>	{
>	    if (listen (fds[nfds].fd, SOMAXCONN) != 0)
>		error (EXIT_FAILURE, errno, "listen");
>	    ++nfds;
>        }
>    }
>    freeaddrinfo (ai);
>    while (1)
>    {
>	int n = poll (fds, nfds, -1);
>	if (n > 0)
>	    for (int i = 0; i < nfds; ++i)
>		if (fds[i].revents & POLLIN)
>		{
>		    struct sockaddr_storage rem;
>		    socklen_t remlen = sizeof (rem);
>		    int fd = accept (fds[i].fd, (struct sockaddr *) &rem, &remlen);
>		    if (fd != -1)
>		    {
>			char buf1[200];
>			if (getnameinfo ((struct sockaddr *) &rem, remlen,
>					 buf1, sizeof (buf1), NULL, 0, 0) != 0)
>			    strcpy (buf1, "???");
>			char buf2[100];
>			(void) getnameinfo ((struct sockaddr *) &rem, remlen,
>					    buf2, sizeof (buf2), NULL, 0,
>					    NI_NUMERICHOST);
>			printf ("connection from %s (%s)\n", buf1, buf2);
>			char buf[1000];
>			ssize_t l = read (fd, buf, sizeof (buf));
>			write (fd, buf, l);
>			close (fd);
>		    }
>		}
>    }
>}

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Attachments on bug 880698: 652835 | 748281