extensions/m_webirc.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_webirc.c: Makes CGI:IRC users appear as coming from their real host
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2006 ircd-ratbox development team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  *
  24  *  $Id: m_webirc.c 3458 2007-05-18 19:51:22Z jilles $
  25  */
  26 /* Usage:
  27  * auth {
  28  *   user = "webirc@<cgiirc ip>"; # if identd used, put ident username instead
  29  *   password = "<password>"; # encryption possible
  30  *   spoof = "webirc."
  31  *   class = "users";
  32  * };
  33  * Possible flags:
  34  *   encrypted - password is encrypted (recommended)
  35  *   kline_exempt - k/g lines on the cgiirc ip are ignored
  36  *   gline_exempt - glines on the cgiirc ip are ignored
  37  * dlines are checked on the cgiirc ip (of course).
  38  * k/d/g/x lines, auth blocks, user limits, etc are checked using the
  39  * real host/ip.
  40  * The password should be specified unencrypted in webirc_password in
  41  * cgiirc.config
  42  */
  43
  44 #include "stdinc.h"
  45 #include "client.h"             /* client struct */
  46 #include "irc_string.h"
  47 #include "hostmask.h"
  48 #include "send.h"               /* sendto_one */
  49 #include "numeric.h"            /* ERR_xxx */
  50 #include "ircd.h"               /* me */
  51 #include "msg.h"
  52 #include "parse.h"
  53 #include "modules.h"
  54 #include "s_serv.h"
  55 #include "hash.h"
  56 #include "s_conf.h"
  57 #include "reject.h"
  58
  59 static int mr_webirc(struct Client *, struct Client *, int, const char **);
  60
  61 struct Message webirc_msgtab = {
  62         "WEBIRC", 0, 0, 0, MFLG_SLOW | MFLG_UNREG,
  63         {{mr_webirc, 5}, mg_reg, mg_ignore, mg_ignore, mg_ignore, mg_reg}
  64 };
  65
  66 mapi_clist_av1 webirc_clist[] = { &webirc_msgtab, NULL };
  67 DECLARE_MODULE_AV1(webirc, NULL, NULL, webirc_clist, NULL, NULL, "$Revision: 20702 $");
  68
  69 /*
  70  * mr_webirc - webirc message handler
  71  *      parv[0] = sender prefix
  72  *      parv[1] = password
  73  *      parv[2] = fake username (we ignore this)
  74  *      parv[3] = fake hostname
  75  *      parv[4] = fake ip
  76  */
  77 static int
  78 mr_webirc(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  79 {
  80         struct ConfItem *aconf;
  81         const char *encr;
  82
  83         if (!strchr(parv[4], '.') && !strchr(parv[4], ':'))
  84         {
  85                 sendto_one(source_p, "NOTICE * :Invalid IP");
  86                 return 0;
  87         }
  88
  89         aconf = find_address_conf(client_p->host, client_p->sockhost,
  90                                 IsGotId(client_p) ? client_p->username : "webirc",
  91                                 IsGotId(client_p) ? client_p->username : "webirc",
  92                                 (struct sockaddr *) &client_p->localClient->ip,
  93                                 client_p->localClient->ip.ss_family);
  94         if (aconf == NULL || !(aconf->status & CONF_CLIENT))
  95                 return 0;
  96         if (!IsConfDoSpoofIp(aconf) || irccmp(aconf->name, "webirc."))
  97         {
  98                 /* XXX */
  99                 sendto_one(source_p, "NOTICE * :Not a CGI:IRC auth block");
 100                 return 0;
 101         }
 102         if (EmptyString(aconf->passwd))
 103         {
 104                 sendto_one(source_p, "NOTICE * :CGI:IRC auth blocks must have a password");
 105                 return 0;
 106         }
 107
 108         if (EmptyString(parv[1]))
 109                 encr = "";
 110         else if (IsConfEncrypted(aconf))
 111                 encr = crypt(parv[1], aconf->passwd);
 112         else
 113                 encr = parv[1];
 114
 115         if (strcmp(encr, aconf->passwd))
 116         {
 117                 sendto_one(source_p, "NOTICE * :CGI:IRC password incorrect");
 118                 return 0;
 119         }
 120
 121
 122         strlcpy(source_p->sockhost, parv[4], sizeof(source_p->sockhost));
 123
 124         if(strlen(parv[3]) <= HOSTLEN)
 125                 strlcpy(source_p->host, parv[3], sizeof(source_p->host));
 126         else
 127                 strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host));
 128
 129         del_unknown_ip(source_p);
 130         inetpton_sock(parv[4], (struct sockaddr *)&source_p->localClient->ip);
 131
 132         /* Check dlines now, k/glines will be checked on registration */
 133         if((aconf = find_dline((struct sockaddr *)&source_p->localClient->ip,
 134                                source_p->localClient->ip.ss_family)))
 135         {
 136                 if(!(aconf->status & CONF_EXEMPTDLINE))
 137                 {
 138                         exit_client(client_p, source_p, &me, "D-lined");
 139                         return 0;
 140                 }
 141         }
 142
 143         sendto_one(source_p, "NOTICE * :CGI:IRC host/IP set to %s %s", parv[3], parv[4]);
 144         return 0;
 145 }