servlink/servlink.c

   1 /************************************************************************
   2  *   IRC - Internet Relay Chat, servlink/servlink.c
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation; either version 1, or (at your option)
   7  *   any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program; if not, write to the Free Software
  16  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  *
  18  *   $Id: servlink.c 6 2005-09-10 01:02:21Z nenolod $
  19  */
  20
  21 #include "setup.h"
  22
  23 #include <sys/types.h>
  24 #include <sys/time.h>
  25 #include <sys/socket.h>
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30 #include <fcntl.h>
  31
  32 #ifdef HAVE_LIBZ
  33 #include <zlib.h>
  34 #endif
  35
  36 #include "servlink.h"
  37 #include "io.h"
  38 #include "control.h"
  39
  40 static void usage(void);
  41
  42 struct slink_state in_state;
  43 struct slink_state out_state;
  44
  45 struct fd_table fds[3] = {
  46         {0, read_ctrl, NULL},   /* ctrl */
  47         {0, NULL, NULL},        /* data */
  48         {0, NULL, NULL},        /* net */
  49 };
  50
  51 /* usage();
  52  *
  53  * Display usage message
  54  */
  55 static void
  56 usage(void)
  57 {
  58         fprintf(stderr, "ircd-ratbox server link v1.2\n");
  59         fprintf(stderr, "2004-03-02\n");
  60         fprintf(stderr, "\n");
  61         fprintf(stderr, "This program is called by the ircd-ratbox ircd.\n");
  62         fprintf(stderr, "It cannot be used on its own.\n");
  63         exit(1);
  64 }
  65
  66 int
  67 main(int argc, char *argv[])
  68 {
  69         int max_fd = 0;
  70         int i, x;
  71 #ifdef SERVLINK_DEBUG
  72         int GDBAttached = 0;
  73
  74         while (!GDBAttached)
  75                 sleep(1);
  76 #endif
  77
  78         /* Make sure we are running under ircd.. */
  79
  80         if(argc != 4 || strcmp(argv[0], "-slink"))
  81                 usage();        /* exits */
  82
  83
  84         for (i = 0; i < 3; i++)
  85         {
  86                 fds[i].fd = atoi(argv[i + 1]);
  87                 if(fds[i].fd < 0)
  88                         exit(1);
  89         }
  90
  91         for (i = 0; i < 3; i++)
  92         {
  93                 /* XXX: Hack alert...we need to do dup2() here for some dumb
  94                  * platforms (Solaris) that don't like select using fds > 255
  95                  */
  96
  97                 if(fds[i].fd >= 255)
  98                 {
  99                         for(x = 0; x < 255; x++)
 100                         {
 101                                 if(x != fds[0].fd && x != fds[1].fd && x != fds[2].fd)
 102                                 {
 103                                         if(dup2(fds[i].fd, x) < 0)
 104                                                 exit(1);
 105                                         close(fds[i].fd);
 106                                         fds[i].fd = x;
 107                                         break;
 108                                 }
 109                         }
 110                 }
 111                 fcntl(fds[i].fd, F_SETFL, O_NONBLOCK);
 112                 if(fds[i].fd > max_fd)
 113                         max_fd = fds[i].fd;
 114         }
 115
 116         /* enter io loop */
 117         io_loop(max_fd + 1);
 118
 119         /* NOTREACHED */
 120         return (0);
 121 }                               /* main() */