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 const char webirc_desc[] = "Adds support for the WebIRC system";
  57
  58 static void mr_webirc(struct MsgBuf *msgbuf_p, struct Client *, struct Client *, int, const char **);
  59
  60 struct Message webirc_msgtab = {
  61         "WEBIRC", 0, 0, 0, 0,
  62         {{mr_webirc, 5}, mg_reg, mg_ignore, mg_ignore, mg_ignore, mg_reg}
  63 };
  64
  65 mapi_clist_av1 webirc_clist[] = { &webirc_msgtab, NULL };
  66
  67 DECLARE_MODULE_AV2(webirc, NULL, NULL, webirc_clist, NULL, NULL, NULL, NULL, webirc_desc);
  68
  69 /*
  70  * mr_webirc - webirc message handler
  71  *      parv[1] = password
  72  *      parv[2] = fake username (we ignore this)
  73  *      parv[3] = fake hostname
  74  *      parv[4] = fake ip
  75  */
  76 static void
  77 mr_webirc(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  78 {
  79         struct ConfItem *aconf;
  80         const char *encr;
  81         struct rb_sockaddr_storage addr;
  82
  83         int secure = 0;
  84
  85         aconf = find_address_conf(client_p->host, client_p->sockhost,
  86                                 IsGotId(client_p) ? client_p->username : "webirc",
  87                                 IsGotId(client_p) ? client_p->username : "webirc",
  88                                 (struct sockaddr *) &client_p->localClient->ip,
  89                                 GET_SS_FAMILY(&client_p->localClient->ip), NULL);
  90         if (aconf == NULL || !(aconf->status & CONF_CLIENT))
  91                 return;
  92         if (!IsConfDoSpoofIp(aconf) || irccmp(aconf->info.name, "webirc."))
  93         {
  94                 /* XXX */
  95                 sendto_one(source_p, "NOTICE * :Not a CGI:IRC auth block");
  96                 return;
  97         }
  98         if (EmptyString(aconf->passwd))
  99         {
 100                 sendto_one(source_p, "NOTICE * :CGI:IRC auth blocks must have a password");
 101                 return;
 102         }
 103         if (!IsSSL(source_p) && aconf->flags & CONF_FLAGS_NEED_SSL)
 104         {
 105                 sendto_one(source_p, "NOTICE * :Your CGI:IRC block requires SSL");
 106                 return;
 107         }
 108
 109         if (EmptyString(parv[1]))
 110                 encr = "";
 111         else if (IsConfEncrypted(aconf))
 112                 encr = rb_crypt(parv[1], aconf->passwd);
 113         else
 114                 encr = parv[1];
 115
 116         if (encr == NULL || strcmp(encr, aconf->passwd))
 117         {
 118                 sendto_one(source_p, "NOTICE * :CGI:IRC password incorrect");
 119                 return;
 120         }
 121
 122         if (rb_inet_pton_sock(parv[4], &addr) <= 0)
 123         {
 124                 sendto_one(source_p, "NOTICE * :Invalid IP");
 125                 return;
 126         }
 127
 128         source_p->localClient->ip = addr;
 129
 130         if (parc >= 6)
 131         {
 132                 char *s;
 133                 for (s = strtok(parv[5], " "); s != NULL; s = strtok(NULL, " "))
 134                 {
 135                         if (!ircncmp(s, "secure", 6) && (s[6] == '=' || s[6] == '\0'))
 136                                 secure = 1;
 137                 }
 138         }
 139
 140         if (secure && !IsSSL(source_p))
 141         {
 142                 sendto_one(source_p, "NOTICE * :CGI:IRC is not connected securely; marking you as insecure");
 143                 return 0;
 144         }
 145
 146         if (!secure)
 147         {
 148                 SetInsecure(source_p);
 149         }
 150
 151         rb_inet_ntop_sock((struct sockaddr *)&source_p->localClient->ip, source_p->sockhost, sizeof(source_p->sockhost));
 152
 153         if(strlen(parv[3]) <= HOSTLEN)
 154                 rb_strlcpy(source_p->host, parv[3], sizeof(source_p->host));
 155         else
 156                 rb_strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host));
 157
 158         /* Check dlines now, klines will be checked on registration */
 159         if((aconf = find_dline((struct sockaddr *)&source_p->localClient->ip,
 160                                GET_SS_FAMILY(&source_p->localClient->ip))))
 161         {
 162                 if(!(aconf->status & CONF_EXEMPTDLINE))
 163                 {
 164                         exit_client(client_p, source_p, &me, "D-lined");
 165                         return;
 166                 }
 167         }
 168
 169         sendto_one(source_p, "NOTICE * :CGI:IRC host/IP set to %s %s", parv[3], parv[4]);
 170 }