src/ctl-server.c

   1 /*
   2  * Copyright (c) 2008 Vincent Bernat <bernat@luffy.cx>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "lldpd.h"
  18
  19 #include <unistd.h>
  20 #include <errno.h>
  21 #include <sys/types.h>
  22 #include <sys/socket.h>
  23 #include <sys/un.h>
  24
  25 static void
  26 ctl_callback(struct lldpd *cfg, struct lldpd_callback *callback)
  27 {
  28         char *buffer;
  29         int n;
  30
  31         if ((buffer = (char *)malloc(MAX_HMSGSIZE)) ==
  32             NULL) {
  33                 LLOG_WARN("failed to alloc reception buffer");
  34                 return;
  35         }
  36         if ((n = recv(callback->fd, buffer,
  37                     MAX_HMSGSIZE, 0)) == -1) {
  38                 LLOG_WARN("error while receiving message");
  39                 free(buffer);
  40                 return;
  41         }
  42         if (n > 0)
  43                 client_handle_client(cfg, callback, buffer, n);
  44         else {
  45                 close(callback->fd);
  46                 lldpd_callback_del(cfg, callback->fd, ctl_callback);
  47         }
  48         free(buffer);
  49 }
  50
  51 void
  52 ctl_accept(struct lldpd *cfg, struct lldpd_callback *callback)
  53 {
  54         int s;
  55         if ((s = accept(callback->fd, NULL, NULL)) == -1) {
  56                 LLOG_WARN("unable to accept connection from socket");
  57                 return;
  58         }
  59         if (lldpd_callback_add(cfg, s, ctl_callback, NULL) != 0) {
  60                 LLOG_WARN("unable to add callback for new client");
  61                 close(s);
  62         }
  63         return;
  64 }