unrealircd

- supernets unrealircd source & configuration
git clone git://git.acid.vegas/unrealircd.git
squit.c (4471B)
      1 /*
      2  *   IRC - Internet Relay Chat, src/modules/squit.c
      3  *   (C) 2004 The UnrealIRCd Team
      4  *
      5  *   See file AUTHORS in IRC package for additional names of
      6  *   the programmers.
      7  *
      8  *   This program is free software; you can redistribute it and/or modify
      9  *   it under the terms of the GNU General Public License as published by
     10  *   the Free Software Foundation; either version 1, or (at your option)
     11  *   any later version.
     12  *
     13  *   This program is distributed in the hope that it will be useful,
     14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16  *   GNU General Public License for more details.
     17  *
     18  *   You should have received a copy of the GNU General Public License
     19  *   along with this program; if not, write to the Free Software
     20  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
     21  */
     22 
     23 #include "unrealircd.h"
     24 
     25 CMD_FUNC(cmd_squit);
     26 
     27 #define MSG_SQUIT 	"SQUIT"	
     28 
     29 ModuleHeader MOD_HEADER
     30   = {
     31 	"squit",
     32 	"5.0",
     33 	"command /squit", 
     34 	"UnrealIRCd Team",
     35 	"unrealircd-6",
     36     };
     37 
     38 MOD_INIT()
     39 {
     40 	CommandAdd(modinfo->handle, MSG_SQUIT, cmd_squit, 2, CMD_USER|CMD_SERVER);
     41 	MARK_AS_OFFICIAL_MODULE(modinfo);
     42 	return MOD_SUCCESS;
     43 }
     44 
     45 MOD_LOAD()
     46 {
     47 	return MOD_SUCCESS;
     48 }
     49 
     50 MOD_UNLOAD()
     51 {
     52 	return MOD_SUCCESS;
     53 }
     54 
     55 /*
     56 ** cmd_squit
     57 **	parv[1] = server name
     58 **	parv[parc-1] = comment
     59 */
     60 CMD_FUNC(cmd_squit)
     61 {
     62 	const char *server;
     63 	Client *target;
     64 	const char *comment = (parc > 2 && parv[parc - 1]) ? parv[parc - 1] : client->name;
     65 
     66 	// FIXME: this function is way too confusing, and full of old shit?
     67 
     68 	if (!ValidatePermissionsForPath("route:local",client,NULL,NULL,NULL))
     69 	{
     70 		sendnumeric(client, ERR_NOPRIVILEGES);
     71 		return;
     72 	}
     73 
     74 	if ((parc < 2) || BadPtr(parv[1]))
     75 	{
     76 		sendnumeric(client, ERR_NEEDMOREPARAMS, "SQUIT");
     77 		return;
     78 	}
     79 
     80 	server = parv[1];
     81 
     82 	target = find_server_quick(server);
     83 	if (target && IsMe(target))
     84 	{
     85 		target = client->direction;
     86 		server = client->direction->local->sockhost;
     87 	}
     88 
     89 	/*
     90 	   ** SQUIT semantics is tricky, be careful...
     91 	   **
     92 	   ** The old (irc2.2PL1 and earlier) code just cleans away the
     93 	   ** server client from the links (because it is never true
     94 	   ** "client->direction == target".
     95 	   **
     96 	   ** This logic here works the same way until "SQUIT host" hits
     97 	   ** the server having the target "host" as local link. Then it
     98 	   ** will do a real cleanup spewing SQUIT's and QUIT's to all
     99 	   ** directions, also to the link from which the orinal SQUIT
    100 	   ** came, generating one unnecessary "SQUIT host" back to that
    101 	   ** link.
    102 	   **
    103 	   ** One may think that this could be implemented like
    104 	   ** "hunt_server" (e.g. just pass on "SQUIT" without doing
    105 	   ** nothing until the server having the link as local is
    106 	   ** reached). Unfortunately this wouldn't work in the real life,
    107 	   ** because either target may be unreachable or may not comply
    108 	   ** with the request. In either case it would leave target in
    109 	   ** links--no command to clear it away. So, it's better just
    110 	   ** clean out while going forward, just to be sure.
    111 	   **
    112 	   ** ...of course, even better cleanout would be to QUIT/SQUIT
    113 	   ** dependant users/servers already on the way out, but
    114 	   ** currently there is not enough information about remote
    115 	   ** clients to do this...   --msa
    116 	 */
    117 	if (!target)
    118 	{
    119 		sendnumeric(client, ERR_NOSUCHSERVER, server);
    120 		return;
    121 	}
    122 	if (MyUser(client) && ((!ValidatePermissionsForPath("route:global",client,NULL,NULL,NULL) && !MyConnect(target)) ||
    123 	    (!ValidatePermissionsForPath("route:local",client,NULL,NULL,NULL) && MyConnect(target))))
    124 	{
    125 		sendnumeric(client, ERR_NOPRIVILEGES);
    126 		return;
    127 	}
    128 	/*
    129 	   **  Notify all opers, if my local link is remotely squitted
    130 	 */
    131 	if (MyConnect(target) && !MyUser(client))
    132 	{
    133 		unreal_log(ULOG_INFO, "link", "SQUIT", client,
    134 		           "SQUIT: Forced server disconnect of $target by $client ($reason)",
    135 		           log_data_client("target", target),
    136 		           log_data_string("reason", comment));
    137 	}
    138 	else if (MyConnect(target))
    139 	{
    140 		if (target->user)
    141 		{
    142 			sendnotice(client, "ERROR: You're connected to %s, we cannot SQUIT ourselves",
    143 			           me.name);
    144 			return;
    145 		}
    146 		unreal_log(ULOG_INFO, "link", "SQUIT", client,
    147 		           "SQUIT: Forced server disconnect of $target by $client ($reason)",
    148 		           log_data_client("target", target),
    149 		           log_data_string("reason", comment));
    150 	}
    151 
    152 	exit_client_ex(target, client->direction, recv_mtags, comment);
    153 }