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 /* Usage:
  25  * auth {
  26  *   user = "webirc@<cgiirc ip>"; # if identd used, put ident username instead
  27  *   password = "<password>"; # encryption possible
  28  *   spoof = "webirc."
  29  *   class = "users";
  30  * };
  31  * Possible flags:
  32  *   encrypted - password is encrypted (recommended)
  33  *   kline_exempt - klines on the cgiirc ip are ignored
  34  * dlines are checked on the cgiirc ip (of course).
  35  * k/d/x lines, auth blocks, user limits, etc are checked using the
  36  * real host/ip.
  37  * The password should be specified unencrypted in webirc_password in
  38  * cgiirc.config
  39  */
  40
  41 #include "stdinc.h"
  42 #include "client.h"             /* client struct */
  43 #include "match.h"
  44 #include "hostmask.h"
  45 #include "send.h"               /* sendto_one */
  46 #include "numeric.h"            /* ERR_xxx */
  47 #include "ircd.h"               /* me */
  48 #include "msg.h"
  49 #include "parse.h"
  50 #include "modules.h"
  51 #include "s_serv.h"
  52 #include "hash.h"
  53 #include "s_conf.h"
  54 #include "reject.h"
  55
  56 static int mr_webirc(struct MsgBuf *msgbuf_p, struct Client *, struct Client *, int, const char **);
  57
  58 struct Message webirc_msgtab = {
  59         "WEBIRC", 0, 0, 0, 0,
  60         {{mr_webirc, 5}, mg_reg, mg_ignore, mg_ignore, mg_ignore, mg_reg}
  61 };
  62
  63 mapi_clist_av1 webirc_clist[] = { &webirc_msgtab, NULL };
  64 DECLARE_MODULE_AV2(webirc, NULL, NULL, webirc_clist, NULL, NULL, NULL, NULL, NULL);
  65
  66 /*
  67  * mr_webirc - webirc message handler
  68  *      parv[1] = password
  69  *      parv[2] = fake username (we ignore this)
  70  *      parv[3] = fake hostname
  71  *      parv[4] = fake ip
  72  */
  73 static int
  74 mr_webirc(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  75 {
  76         struct ConfItem *aconf;
  77         const char *encr;
  78         struct rb_sockaddr_storage addr;
  79
  80         if ((!strchr(parv[4], '.') && !strchr(parv[4], ':')) ||
  81                         strlen(parv[4]) + (*parv[4] == ':') >=
  82                         sizeof(source_p->sockhost))
  83         {
  84                 sendto_one(source_p, "NOTICE * :Invalid IP");
  85                 return 0;
  86         }
  87
  88         aconf = find_address_conf(client_p->host, client_p->sockhost,
  89                                 IsGotId(client_p) ? client_p->username : "webirc",
  90                                 IsGotId(client_p) ? client_p->username : "webirc",
  91                                 (struct sockaddr *) &client_p->localClient->ip,
  92                                 client_p->localClient->ip.ss_family, NULL);
  93         if (aconf == NULL || !(aconf->status & CONF_CLIENT))
  94                 return 0;
  95         if (!IsConfDoSpoofIp(aconf) || irccmp(aconf->info.name, "webirc."))
  96         {
  97                 /* XXX */
  98                 sendto_one(source_p, "NOTICE * :Not a CGI:IRC auth block");
  99                 return 0;
 100         }
 101         if (EmptyString(aconf->passwd))
 102         {
 103                 sendto_one(source_p, "NOTICE * :CGI:IRC auth blocks must have a password");
 104                 return 0;
 105         }
 106
 107         if (EmptyString(parv[1]))
 108                 encr = "";
 109         else if (IsConfEncrypted(aconf))
 110                 encr = rb_crypt(parv[1], aconf->passwd);
 111         else
 112                 encr = parv[1];
 113
 114         if (encr == NULL || strcmp(encr, aconf->passwd))
 115         {
 116                 sendto_one(source_p, "NOTICE * :CGI:IRC password incorrect");
 117                 return 0;
 118         }
 119
 120         if (rb_inet_pton_sock(parv[4], (struct sockaddr *)&addr) <= 0)
 121         {
 122                 sendto_one(source_p, "NOTICE * :Invalid IP");
 123                 return 0;
 124         }
 125
 126         if (*parv[4] == ':')
 127         {
 128                 source_p->sockhost[0] = '0';
 129                 rb_strlcpy(source_p->sockhost + 1, parv[4],
 130                                 sizeof(source_p->sockhost) - 1);
 131         }
 132         else
 133                 rb_strlcpy(source_p->sockhost, parv[4],
 134                                 sizeof(source_p->sockhost));
 135
 136         if(strlen(parv[3]) <= HOSTLEN)
 137                 rb_strlcpy(source_p->host, parv[3], sizeof(source_p->host));
 138         else
 139                 rb_strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host));
 140
 141         source_p->localClient->ip = addr;
 142
 143         /* Check dlines now, klines will be checked on registration */
 144         if((aconf = find_dline((struct sockaddr *)&source_p->localClient->ip,
 145                                source_p->localClient->ip.ss_family)))
 146         {
 147                 if(!(aconf->status & CONF_EXEMPTDLINE))
 148                 {
 149                         exit_client(client_p, source_p, &me, "D-lined");
 150                         return 0;
 151                 }
 152         }
 153
 154         sendto_one(source_p, "NOTICE * :CGI:IRC host/IP set to %s %s", parv[3], parv[4]);
 155         return 0;
 156 }