extensions/cap_realhost.c

   1 /*
   2  *  Copyright (C) 2020 Ed Kellett
   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 2 of the License, or
   7  *  (at your option) 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  17  *  USA
  18  */
  19
  20 #include <stdinc.h>
  21 #include <modules.h>
  22 #include <capability.h>
  23 #include <s_serv.h>
  24 #include <s_newconf.h>
  25 #include <client.h>
  26 #include <msgbuf.h>
  27
  28 static char cap_realhost_desc[] = "Provides the solanum.chat/realhost oper-only capability";
  29
  30 static bool cap_oper_realhost_visible(struct Client *);
  31 static void cap_realhost_outbound_msgbuf(void *);
  32 static void cap_realhost_umode_changed(void *);
  33 static void cap_realhost_cap_change(void *);
  34
  35 static unsigned CLICAP_REALHOST;
  36 static unsigned CLICAP_OPER_REALHOST;
  37
  38 static struct ClientCapability capdata_oper_realhost = {
  39         .visible = cap_oper_realhost_visible,
  40 };
  41
  42 mapi_cap_list_av2 cap_realhost_caps[] = {
  43         { MAPI_CAP_CLIENT, "solanum.chat/realhost", NULL, &CLICAP_REALHOST },
  44         { MAPI_CAP_CLIENT, "?oper_realhost", &capdata_oper_realhost, &CLICAP_OPER_REALHOST },
  45         { 0, NULL, NULL, NULL },
  46 };
  47
  48 mapi_hfn_list_av1 cap_realhost_hfnlist[] = {
  49         { "outbound_msgbuf", cap_realhost_outbound_msgbuf, HOOK_NORMAL },
  50         { "umode_changed", cap_realhost_umode_changed, HOOK_MONITOR },
  51         { "cap_change", cap_realhost_cap_change, HOOK_MONITOR },
  52         { NULL, NULL, 0 },
  53 };
  54
  55 static bool
  56 cap_oper_realhost_visible(struct Client *client)
  57 {
  58         return false;
  59 }
  60
  61 static void
  62 cap_realhost_outbound_msgbuf(void *data_)
  63 {
  64         hook_data *data = data_;
  65         struct MsgBuf *msgbuf = data->arg1;
  66
  67         if (data->client == NULL || !IsPerson(data->client))
  68                 return;
  69
  70         if (!IsIPSpoof(data->client) && !EmptyString(data->client->sockhost) && strcmp(data->client->sockhost, "0"))
  71         {
  72                 msgbuf_append_tag(msgbuf, "solanum.chat/ip", data->client->sockhost,
  73                                 IsDynSpoof(data->client) ? CLICAP_OPER_REALHOST : CLICAP_REALHOST);
  74         }
  75
  76         if (!EmptyString(data->client->orighost))
  77                 msgbuf_append_tag(msgbuf, "solanum.chat/realhost", data->client->orighost, CLICAP_OPER_REALHOST);
  78 }
  79
  80 static inline void
  81 update_clicap_oper_realhost(struct Client *client)
  82 {
  83         client->localClient->caps &= ~CLICAP_OPER_REALHOST;
  84         if (client->localClient->caps & CLICAP_REALHOST && HasPrivilege(client, "auspex:hostname"))
  85         {
  86                 client->localClient->caps |= CLICAP_OPER_REALHOST;
  87         }
  88 }
  89
  90 static void
  91 cap_realhost_umode_changed(void *data_)
  92 {
  93         hook_data_umode_changed *data = data_;
  94
  95         if (!MyClient(data->client))
  96                 return;
  97
  98         update_clicap_oper_realhost(data->client);
  99 }
 100
 101 static void
 102 cap_realhost_cap_change(void *data_)
 103 {
 104         hook_data_cap_change *data = data_;
 105
 106         update_clicap_oper_realhost(data->client);
 107 }
 108
 109 static int
 110 modinit(void)
 111 {
 112         rb_dlink_node *ptr;
 113
 114         RB_DLINK_FOREACH(ptr, lclient_list.head)
 115         {
 116                 struct Client *client = ptr->data;
 117
 118                 update_clicap_oper_realhost(client);
 119         }
 120
 121         return 0;
 122 }
 123
 124 DECLARE_MODULE_AV2(cap_realhost, modinit, NULL, NULL, NULL, cap_realhost_hfnlist, cap_realhost_caps, NULL, cap_realhost_desc);