/*
  *   Unreal Internet Relay Chat Daemon, src/modules/vhost.c
  *   (C) 2000-2001 Carsten V. Munk and the UnrealIRCd Team
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation; either version 1, or (at your option)
  *   any later version.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program; if not, write to the Free Software
  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include "unrealircd.h"
 
 CMD_FUNC(cmd_vhost);
 
 /* Place includes here */
 #define MSG_VHOST       "VHOST"
 
 ModuleHeader MOD_HEADER
   = {
 	"vhost",	/* Name of module */
 	"5.0", /* Version */
 	"command /vhost", /* Short description of module */
 	"UnrealIRCd Team",
 	"unrealircd-6",
     };
 
 /* This is called on module init, before Server Ready */
 MOD_INIT()
 {
 	CommandAdd(modinfo->handle, MSG_VHOST, cmd_vhost, MAXPARA, CMD_USER);
 	MARK_AS_OFFICIAL_MODULE(modinfo);
 	return MOD_SUCCESS;
 }
 
 /* Is first run when server is 100% ready */
 MOD_LOAD()
 {
 	return MOD_SUCCESS;
 }
 
 
 /* Called when module is unloaded */
 MOD_UNLOAD()
 {
 	return MOD_SUCCESS;	
 }
 
 CMD_FUNC(cmd_vhost)
 {
 	ConfigItem_vhost *vhost;
 	char login[HOSTLEN+1];
 	const char *password;
 	char olduser[USERLEN+1];
 
 	if (!MyUser(client))
 		return;
 
 	if ((parc < 2) || BadPtr(parv[1]))
 	{
 		sendnumeric(client, ERR_NEEDMOREPARAMS, "VHOST");
 		return;
 
 	}
 
 	/* cut-off too long login names. HOSTLEN is arbitrary, we just don't want our
 	 * error messages to be cut off because the user is sending huge login names.
 	 */
 	strlcpy(login, parv[1], sizeof(login));
 
 	password = (parc > 2) ? parv[2] : "";
 
 	if (!(vhost = find_vhost(login)))
 	{
 		unreal_log(ULOG_WARNING, "vhost", "VHOST_FAILED", client,
 		           "Failed VHOST attempt by $client.details [reason: $reason] [vhost-block: $vhost_block]",
 		           log_data_string("reason", "Vhost block not found"),
 		           log_data_string("fail_type", "UNKNOWN_VHOST_NAME"),
 		           log_data_string("vhost_block", login));
 		sendnotice(client, "*** [\2vhost\2] Login for %s failed - password incorrect", login);
 		return;
 	}
 	
 	if (!user_allowed_by_security_group(client, vhost->match))
 	{
 		unreal_log(ULOG_WARNING, "vhost", "VHOST_FAILED", client,
 		           "Failed VHOST attempt by $client.details [reason: $reason] [vhost-block: $vhost_block]",
 		           log_data_string("reason", "Host does not match"),
 		           log_data_string("fail_type", "NO_HOST_MATCH"),
 		           log_data_string("vhost_block", login));
 		sendnotice(client, "*** No vHost lines available for your host");
 		return;
 	}
 
 	if (!Auth_Check(client, vhost->auth, password))
 	{
 		unreal_log(ULOG_WARNING, "vhost", "VHOST_FAILED", client,
 		           "Failed VHOST attempt by $client.details [reason: $reason] [vhost-block: $vhost_block]",
 		           log_data_string("reason", "Authentication failed"),
 		           log_data_string("fail_type", "AUTHENTICATION_FAILED"),
 		           log_data_string("vhost_block", login));
 		sendnotice(client, "*** [\2vhost\2] Login for %s failed - password incorrect", login);
 		return;
 	}
 
 	/* Authentication passed, but.. there could still be other restrictions: */
 	switch (UHOST_ALLOWED)
 	{
 		case UHALLOW_NEVER:
 			if (MyUser(client))
 			{
 				sendnotice(client, "*** /vhost is disabled");
 				return;
 			}
 			break;
 		case UHALLOW_ALWAYS:
 			break;
 		case UHALLOW_NOCHANS:
 			if (MyUser(client) && client->user->joined)
 			{
 				sendnotice(client, "*** /vhost can not be used while you are on a channel");
 				return;
 			}
 			break;
 		case UHALLOW_REJOIN:
 			/* join sent later when the host has been changed */
 			break;
 	}
 
 	/* All checks passed, now let's go ahead and change the host */
 
 	userhost_save_current(client);
 
 	safe_strdup(client->user->virthost, vhost->virthost);
 	if (vhost->virtuser)
 	{
 		strlcpy(olduser, client->user->username, sizeof(olduser));
 		strlcpy(client->user->username, vhost->virtuser, sizeof(client->user->username));
 		sendto_server(client, 0, 0, NULL, ":%s SETIDENT %s", client->id,
 		    client->user->username);
 	}
 	client->umodes |= UMODE_HIDE;
 	client->umodes |= UMODE_SETHOST;
 	sendto_server(client, 0, 0, NULL, ":%s SETHOST %s", client->id, client->user->virthost);
 	sendto_one(client, NULL, ":%s MODE %s :+tx", client->name, client->name);
 	if (vhost->swhois)
 	{
 		SWhois *s;
 		for (s = vhost->swhois; s; s = s->next)
 			swhois_add(client, "vhost", -100, s->line, &me, NULL);
 	}
 	sendnotice(client, "*** Your vhost is now %s%s%s",
 		vhost->virtuser ? vhost->virtuser : "",
 		vhost->virtuser ? "@" : "",
 		vhost->virthost);
 
 	if (vhost->virtuser)
 	{
 		/* virtuser@virthost */
 		unreal_log(ULOG_INFO, "vhost", "VHOST_SUCCESS", client,
 			   "$client.details is now using vhost $virtuser@$virthost [vhost-block: $vhost_block]",
 			   log_data_string("virtuser", vhost->virtuser),
 			   log_data_string("virthost", vhost->virthost),
 			   log_data_string("vhost_block", login));
 	} else {
 		/* just virthost */
 		unreal_log(ULOG_INFO, "vhost", "VHOST_SUCCESS", client,
 			   "$client.details is now using vhost $virthost [vhost-block: $vhost_block]",
 			   log_data_string("virthost", vhost->virthost),
 			   log_data_string("vhost_block", login));
 	}
 
 	userhost_changed(client);
 }

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