mirror of
https://github.com/matrix-construct/construct
synced 2024-08-23 18:14:46 +02:00
419 lines
12 KiB
C
419 lines
12 KiB
C
/*
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* ircd-ratbox: A slightly useful ircd.
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* m_whois.c: Shows who a user is.
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*
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* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
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* Copyright (C) 1996-2002 Hybrid Development Team
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* Copyright (C) 2002-2005 ircd-ratbox development team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#include "stdinc.h"
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#include "client.h"
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#include "hash.h"
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#include "channel.h"
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#include "hash.h"
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#include "ircd.h"
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#include "numeric.h"
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#include "s_conf.h"
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#include "s_serv.h"
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#include "send.h"
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#include "match.h"
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#include "s_conf.h"
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#include "logger.h"
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#include "msg.h"
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#include "parse.h"
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#include "modules.h"
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#include "hook.h"
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#include "s_newconf.h"
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#include "ipv4_from_ipv6.h"
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#include "ratelimit.h"
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#include "s_assert.h"
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static const char whois_desc[] =
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"Provides the WHOIS command to display information about a user";
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static void do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
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static void single_whois(struct Client *source_p, struct Client *target_p, int operspy);
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static void m_whois(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static void ms_whois(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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struct Message whois_msgtab = {
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"WHOIS", 0, 0, 0, 0,
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{mg_unreg, {m_whois, 2}, {ms_whois, 2}, mg_ignore, mg_ignore, {m_whois, 2}}
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};
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int doing_whois_hook;
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int doing_whois_global_hook;
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int doing_whois_channel_visibility_hook;
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mapi_clist_av1 whois_clist[] = { &whois_msgtab, NULL };
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mapi_hlist_av1 whois_hlist[] = {
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{ "doing_whois", &doing_whois_hook },
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{ "doing_whois_global", &doing_whois_global_hook },
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{ "doing_whois_channel_visibility", &doing_whois_channel_visibility_hook },
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{ NULL, NULL }
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};
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DECLARE_MODULE_AV2(whois, NULL, NULL, whois_clist, whois_hlist, NULL, NULL, NULL, whois_desc);
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/*
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* m_whois
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* parv[1] = nickname masklist
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*/
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static void
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m_whois(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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static time_t last_used = 0;
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if(parc > 2)
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{
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if(EmptyString(parv[2]))
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{
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sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
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me.name, source_p->name);
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return;
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}
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if(!IsOper(source_p))
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{
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/* seeing as this is going across servers, we should limit it */
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if((last_used + ConfigFileEntry.pace_wait_simple) > rb_current_time() || !ratelimit_client(source_p, 2))
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{
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sendto_one(source_p, form_str(RPL_LOAD2HI),
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me.name, source_p->name, "WHOIS");
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sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
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form_str(RPL_ENDOFWHOIS), parv[2]);
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return;
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}
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else
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last_used = rb_current_time();
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}
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if(hunt_server(client_p, source_p, ":%s WHOIS %s :%s", 1, parc, parv) !=
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HUNTED_ISME)
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return;
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parv[1] = parv[2];
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}
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do_whois(client_p, source_p, parc, parv);
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}
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/*
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* ms_whois
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* parv[1] = server to reply
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* parv[2] = nickname to whois
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*/
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static void
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ms_whois(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Client *target_p;
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/* note: early versions of ratbox allowed users to issue a remote
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* whois with a blank parv[2], so we cannot treat it as a protocol
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* violation. --anfl
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*/
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if(parc < 3 || EmptyString(parv[2]))
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{
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sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN),
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me.name, source_p->name);
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return;
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}
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/* check if parv[1] exists */
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if((target_p = find_client(parv[1])) == NULL)
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{
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sendto_one_numeric(source_p, ERR_NOSUCHSERVER,
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form_str(ERR_NOSUCHSERVER),
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IsDigit(parv[1][0]) ? "*" : parv[1]);
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return;
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}
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/* if parv[1] isnt my client, or me, someone else is supposed
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* to be handling the request.. so send it to them
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*/
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if(!MyClient(target_p) && !IsMe(target_p))
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{
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sendto_one(target_p, ":%s WHOIS %s :%s",
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get_id(source_p, target_p),
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get_id(target_p, target_p), parv[2]);
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return;
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}
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/* ok, the target is either us, or a client on our server, so perform the whois
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* but first, parv[1] == server to perform the whois on, parv[2] == person
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* to whois, so make parv[1] = parv[2] so do_whois is ok -- fl_
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*/
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parv[1] = parv[2];
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do_whois(client_p, source_p, parc, parv);
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}
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/* do_whois
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*
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* inputs - pointer to
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* output -
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* side effects -
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*/
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static void
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do_whois(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Client *target_p;
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char *nick;
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char *p = NULL;
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int operspy = 0;
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nick = LOCAL_COPY(parv[1]);
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if((p = strchr(nick, ',')))
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*p = '\0';
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if(IsOperSpy(source_p) && *nick == '!')
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{
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operspy = 1;
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nick++;
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}
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target_p = find_named_person(nick);
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if(target_p != NULL)
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{
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if(operspy)
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{
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char buffer[BUFSIZE];
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snprintf(buffer, sizeof(buffer), "%s!%s@%s %s",
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target_p->name, target_p->username,
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target_p->host, target_p->servptr->name);
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report_operspy(source_p, "WHOIS", buffer);
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}
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single_whois(source_p, target_p, operspy);
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}
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else
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sendto_one_numeric(source_p, ERR_NOSUCHNICK,
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form_str(ERR_NOSUCHNICK),
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nick);
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sendto_one_numeric(source_p, RPL_ENDOFWHOIS,
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form_str(RPL_ENDOFWHOIS), parv[1]);
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}
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/*
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* single_whois()
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*
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* Inputs - source_p client to report to
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* - target_p client to report on
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* Output - if found return 1
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* Side Effects - do a single whois on given client
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* writing results to source_p
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*/
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static void
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single_whois(struct Client *source_p, struct Client *target_p, int operspy)
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{
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char buf[BUFSIZE];
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rb_dlink_node *ptr;
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struct membership *msptr;
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struct Channel *chptr;
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int cur_len = 0;
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int mlen;
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char *t;
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int tlen;
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hook_data_client hdata;
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int extra_space = 0;
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#ifdef RB_IPV6
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struct sockaddr_in ip4;
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#endif
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if(target_p->user == NULL)
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{
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s_assert(0);
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return;
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}
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sendto_one_numeric(source_p, RPL_WHOISUSER, form_str(RPL_WHOISUSER),
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target_p->name, target_p->username,
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target_p->host, target_p->info);
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cur_len = mlen = sprintf(buf, form_str(RPL_WHOISCHANNELS),
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get_id(&me, source_p), get_id(source_p, source_p),
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target_p->name);
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/* Make sure it won't overflow when sending it to the client
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* in full names; note that serverhiding may require more space
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* for a different server name (not done here) -- jilles
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*/
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if (!MyConnect(source_p))
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{
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extra_space = strlen(source_p->name) - 9;
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if (extra_space < 0)
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extra_space = 0;
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extra_space += strlen(me.name) - 2; /* make sure >= 0 */
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cur_len += extra_space;
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}
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t = buf + mlen;
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hdata.client = source_p;
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hdata.target = target_p;
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if (!IsService(target_p))
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{
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RB_DLINK_FOREACH(ptr, target_p->user->channel.head)
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{
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msptr = ptr->data;
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chptr = msptr->chptr;
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hdata.chptr = chptr;
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hdata.approved = ShowChannel(source_p, chptr);
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call_hook(doing_whois_channel_visibility_hook, &hdata);
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if(hdata.approved || operspy)
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{
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if((cur_len + strlen(chptr->chname) + 3) > (BUFSIZE - 5))
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{
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sendto_one(source_p, "%s", buf);
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cur_len = mlen + extra_space;
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t = buf + mlen;
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}
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tlen = sprintf(t, "%s%s%s ",
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hdata.approved ? "" : "!",
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find_channel_status(msptr, 1),
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chptr->chname);
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t += tlen;
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cur_len += tlen;
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}
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}
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}
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if(cur_len > mlen + extra_space)
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sendto_one(source_p, "%s", buf);
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sendto_one_numeric(source_p, RPL_WHOISSERVER, form_str(RPL_WHOISSERVER),
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target_p->name, target_p->servptr->name,
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target_p->servptr->info);
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if(target_p->user->away)
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sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
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target_p->name, target_p->user->away);
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if(IsOper(target_p) && (!ConfigFileEntry.hide_opers_in_whois || IsOper(source_p)))
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{
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sendto_one_numeric(source_p, RPL_WHOISOPERATOR, form_str(RPL_WHOISOPERATOR),
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target_p->name,
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IsService(target_p) ? ConfigFileEntry.servicestring :
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(IsAdmin(target_p) ? GlobalSetOptions.adminstring :
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GlobalSetOptions.operstring));
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}
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if(MyClient(target_p) && !EmptyString(target_p->localClient->opername) && IsOper(source_p))
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{
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char buf[512];
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snprintf(buf, sizeof(buf), "is opered as %s, privset %s",
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target_p->localClient->opername, target_p->localClient->privset->name);
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sendto_one_numeric(source_p, RPL_WHOISSPECIAL, form_str(RPL_WHOISSPECIAL),
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target_p->name, buf);
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}
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if(IsSSLClient(target_p))
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{
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char cbuf[256] = "is using a secure connection";
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if (MyClient(target_p) && target_p->localClient->cipher_string != NULL)
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rb_snprintf_append(cbuf, sizeof(cbuf), " [%s]", target_p->localClient->cipher_string);
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sendto_one_numeric(source_p, RPL_WHOISSECURE, form_str(RPL_WHOISSECURE),
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target_p->name, cbuf);
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if((source_p == target_p || IsOper(source_p)) &&
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target_p->certfp != NULL)
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sendto_one_numeric(source_p, RPL_WHOISCERTFP,
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form_str(RPL_WHOISCERTFP),
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target_p->name, target_p->certfp);
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}
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if(MyClient(target_p))
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{
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if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
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{
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/* trick here: show a nonoper their own IP if
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* dynamic spoofed but not if auth{} spoofed
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* -- jilles */
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ClearDynSpoof(target_p);
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sendto_one_numeric(source_p, RPL_WHOISHOST,
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form_str(RPL_WHOISHOST),
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target_p->name, target_p->orighost,
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show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255");
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SetDynSpoof(target_p);
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}
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else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p))
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sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
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form_str(RPL_WHOISACTUALLY),
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target_p->name, target_p->sockhost);
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#ifdef RB_IPV6
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if (GET_SS_FAMILY(&target_p->localClient->ip) == AF_INET6 &&
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(show_ip(source_p, target_p) ||
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(source_p == target_p && !IsIPSpoof(target_p))) &&
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ipv4_from_ipv6((struct sockaddr_in6 *)&target_p->localClient->ip, &ip4))
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{
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rb_inet_ntop_sock((struct sockaddr *)&ip4,
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buf, sizeof buf);
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sendto_one_numeric(source_p, RPL_WHOISTEXT,
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"%s :Underlying IPv4 is %s",
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target_p->name, buf);
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}
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#endif /* RB_IPV6 */
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sendto_one_numeric(source_p, RPL_WHOISIDLE, form_str(RPL_WHOISIDLE),
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target_p->name,
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(long)(rb_current_time() - target_p->localClient->last),
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(unsigned long)target_p->localClient->firsttime);
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}
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else
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{
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if (IsDynSpoof(target_p) && (IsOper(source_p) || source_p == target_p))
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{
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ClearDynSpoof(target_p);
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sendto_one_numeric(source_p, RPL_WHOISHOST,
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form_str(RPL_WHOISHOST),
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target_p->name, target_p->orighost,
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show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0")? target_p->sockhost : "255.255.255.255");
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SetDynSpoof(target_p);
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}
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else if(ConfigFileEntry.use_whois_actually && show_ip(source_p, target_p) &&
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!EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
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{
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sendto_one_numeric(source_p, RPL_WHOISACTUALLY,
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form_str(RPL_WHOISACTUALLY),
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target_p->name, target_p->sockhost);
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}
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}
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/* doing_whois_hook must only be called for local clients,
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* doing_whois_global_hook must only be called for local targets
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*/
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/* it is important that these are called *before* RPL_ENDOFWHOIS is
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* sent, services compatibility code depends on it. --anfl
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*/
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if(MyClient(source_p))
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call_hook(doing_whois_hook, &hdata);
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else
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call_hook(doing_whois_global_hook, &hdata);
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}
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