| 1 |
/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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* parse_aline.c: All the functions needed for klining etc. |
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* |
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* Copyright (C) 2005 by the past and present ircd coders, and others. |
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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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* $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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#include "conf/conf.h" |
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#include "ircd_defs.h" |
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#include "parse_aline.h" |
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#include "s_serv.h" |
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#include "channel.h" |
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#include "client.h" |
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#include "common.h" |
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#include "hash.h" |
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#include "ircd.h" |
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#include "listener.h" |
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#include "numeric.h" |
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#include "send.h" |
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#include "userhost.h" |
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#include "s_user.h" |
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|
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static int find_user_host(struct Client *, char *, char *, char *, unsigned int); |
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|
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int |
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valid_wild_card_simple(const char *data) |
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{ |
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const unsigned char *p = (const unsigned char *)data; |
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int nonwild = 0; |
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|
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while (*p != '\0') |
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{ |
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if ((*p == '\\' && *++p) || (*p && !IsMWildChar(*p))) |
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if (++nonwild == General.min_nonwildcard_simple) |
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return 1; |
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if (*p != '\0') |
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++p; |
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} |
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|
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return 0; |
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} |
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|
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/* parse_aline |
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* |
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* input - pointer to cmd name being used |
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* - pointer to client using cmd |
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* - parc parameter count |
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* - parv[] list of parameters to parse |
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* - parse_flags bit map of things to test |
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* - pointer to user or string to parse into |
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* - pointer to host or NULL to parse into if non NULL |
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* - pointer to optional tkline time or NULL |
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* - pointer to target_server to parse into if non NULL |
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* - pointer to reason to parse into |
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* |
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* output - 1 if valid, -1 if not valid |
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* side effects - A generalised k/d/x etc. line parser, |
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* "ALINE [time] user@host|string [ON] target :reason" |
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* will parse returning a parsed user, host if |
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* h_p pointer is non NULL, string otherwise. |
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* if tkline_time pointer is non NULL a tk line will be set |
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* to non zero if found. |
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* if tkline_time pointer is NULL and tk line is found, |
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* error is reported. |
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* if target_server is NULL and an "ON" is found error |
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* is reported. |
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* if reason pointer is NULL ignore pointer, |
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* this allows usee of parse_a_line in unkline etc. |
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* |
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* - Dianora |
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*/ |
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int |
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parse_aline(const char *cmd, struct Client *source_p, |
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int parc, char **parv, |
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int parse_flags, char **up_p, char **h_p, time_t *tkline_time, |
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char **target_server, char **reason) |
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{ |
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int found_tkline_time = 0; |
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static char def_reason[] = "No Reason"; |
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static char user[USERLEN * 4 + 1]; |
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static char host[HOSTLEN * 4 + 1]; |
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|
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++parv; |
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--parc; |
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|
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found_tkline_time = valid_tkline(*parv, TK_MINUTES); |
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|
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if (found_tkline_time != 0) |
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{ |
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++parv; |
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--parc; |
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|
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if (tkline_time != NULL) |
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*tkline_time = found_tkline_time; |
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else |
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{ |
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sendto_one(source_p, ":%s NOTICE %s :temp_line not supported by %s", |
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me.name, source_p->name, cmd); |
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return -1; |
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} |
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} |
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|
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if (parc == 0 || EmptyString(*parv)) |
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{ |
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sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), |
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me.name, source_p->name, cmd); |
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return -1; |
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} |
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|
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if (h_p == NULL) |
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*up_p = *parv; |
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else |
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{ |
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if (find_user_host(source_p, *parv, user, host, parse_flags) == 0) |
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return -1; |
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|
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*up_p = user; |
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*h_p = host; |
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} |
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|
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--parc; |
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++parv; |
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|
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if (parc != 0) |
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{ |
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if (!irccmp(*parv, "ON")) |
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{ |
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--parc; |
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++parv; |
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|
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if (target_server == NULL) |
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{ |
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sendto_one(source_p, ":%s NOTICE %s :ON server not supported by %s", |
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me.name, source_p->name, cmd); |
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return -1; |
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} |
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|
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if (!IsOperRemoteBan(source_p)) |
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{ |
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sendto_one(source_p, form_str(ERR_NOPRIVS), |
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me.name, source_p->name, "remoteban"); |
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return -1; |
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} |
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|
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if (parc == 0 || EmptyString(*parv)) |
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{ |
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sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), |
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me.name, source_p->name, cmd); |
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return -1; |
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} |
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|
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*target_server = *parv; |
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--parc; |
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++parv; |
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} |
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else |
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{ |
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/* Make sure target_server *is* NULL if no ON server found |
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* caller probably NULL'd it first, but no harm to do it again -db |
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*/ |
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if (target_server != NULL) |
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*target_server = NULL; |
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} |
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} |
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|
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if (h_p != NULL) |
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{ |
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if (strchr(user, '!') != NULL) |
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{ |
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sendto_one(source_p, ":%s NOTICE %s :Invalid character '!' in kline", |
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me.name, source_p->name); |
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return -1; |
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} |
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|
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if ((parse_flags & AWILD) && !valid_wild_card(source_p, YES, 2, *up_p, *h_p)) |
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return -1; |
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} |
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else |
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if ((parse_flags & AWILD) && !valid_wild_card(source_p, YES, 1, *up_p)) |
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return -1; |
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|
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if (reason != NULL) |
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{ |
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if (parc != 0 && !EmptyString(*parv)) |
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{ |
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*reason = *parv; |
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if (!valid_comment(source_p, *reason, YES)) |
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return -1; |
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} |
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else |
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*reason = def_reason; |
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} |
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|
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return 1; |
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} |
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|
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/* |
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* cluster_a_line |
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* |
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* inputs - client sending the cluster |
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* - command name "KLINE" "XLINE" etc. |
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* - capab -- CAP_KLN etc. from s_serv.h |
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* - cluster type -- CLUSTER_KLINE etc. from s_conf.h |
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* - pattern and args to send along |
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* output - none |
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* side effects - Take source_p send the pattern with args given |
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* along to all servers that match capab and cluster type |
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*/ |
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void |
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cluster_a_line(struct Client *source_p, const char *command, |
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int capab, int cluster_type, const char *pattern, ...) |
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{ |
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va_list args; |
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char buffer[IRCD_BUFSIZE]; |
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dlink_node *ptr = NULL; |
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|
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va_start(args, pattern); |
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vsnprintf(buffer, sizeof(buffer), pattern, args); |
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va_end(args); |
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|
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DLINK_FOREACH(ptr, cluster_confs.head) |
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{ |
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const struct ClusterConf *conf = ptr->data; |
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|
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if ((conf->type & cluster_type)) |
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sendto_match_servs(source_p, conf->server, CAP_CLUSTER|capab, |
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"%s %s %s", command, conf->server, buffer); |
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} |
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} |
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|
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/* valid_comment() |
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* |
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* inputs - pointer to client |
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* - pointer to comment |
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* output - 0 if no valid comment, |
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* - 1 if valid |
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* side effects - truncates reason where necessary |
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*/ |
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int |
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valid_comment(struct Client *source_p, char *comment, int warn) |
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{ |
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if (strchr(comment, '"')) |
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{ |
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if (warn) |
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sendto_one(source_p, ":%s NOTICE %s :Invalid character '\"' in comment", |
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me.name, source_p->name); |
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return 0; |
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} |
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|
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if (strlen(comment) > REASONLEN) |
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comment[REASONLEN-1] = '\0'; |
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|
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return 1; |
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} |
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|
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/* find_user_host() |
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* |
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* inputs - pointer to client placing kline |
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* - pointer to user_host_or_nick |
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* - pointer to user buffer |
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* - pointer to host buffer |
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* output - 0 if not ok to kline, 1 to kline i.e. if valid user host |
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* side effects - |
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*/ |
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static int |
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find_user_host(struct Client *source_p, char *user_host_or_nick, |
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char *luser, char *lhost, unsigned int flags) |
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{ |
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char lnick[NICKLEN]; |
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struct split_nuh_item nuh; |
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|
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if (lhost == NULL) |
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{ |
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strlcpy(luser, user_host_or_nick, USERLEN*4 + 1); |
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return 1; |
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} |
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|
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nuh.nuhmask = user_host_or_nick; |
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nuh.nickptr = lnick; |
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nuh.userptr = luser; |
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nuh.hostptr = lhost; |
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|
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nuh.nicksize = NICKLEN; |
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nuh.usersize = USERLEN*4+1; |
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nuh.hostsize = HOSTLEN*4+1; |
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|
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split_nuh(&nuh); |
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|
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if (!(flags & NOUSERLOOKUP) && irccmp(lnick, "*")) |
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{ |
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const struct Client *target_p = NULL; |
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|
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// Try to find user@host mask from nick |
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if ((target_p = find_chasing(source_p, lnick, NULL)) == NULL) |
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return 0; |
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|
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if (IsExemptKline(target_p)) |
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{ |
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if (!IsServer(source_p)) |
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sendto_one(source_p, ":%s NOTICE %s :%s is E-lined", |
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me.name, source_p->name, target_p->name); |
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return 0; |
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} |
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|
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/* |
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* turn the "user" bit into "*user", blow away '~' |
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* if found in original user name (non-idented) |
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*/ |
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strlcpy(luser, target_p->username, USERLEN*4 + 1); |
| 328 |
|
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if (target_p->username[0] == '~') |
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luser[0] = '*'; |
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|
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if (target_p->sockhost[0] == '\0' || !irccmp(target_p->sockhost, "0")) |
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strlcpy(lhost, target_p->host, HOSTLEN*4 + 1); |
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else |
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strlcpy(lhost, target_p->sockhost, HOSTLEN*4 + 1); |
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return 1; |
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} |
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|
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return 1; |
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} |
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|
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/* |
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* valid_tkline() |
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* |
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* inputs - pointer to ascii string to check |
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* - whether the specified time is in seconds or minutes |
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* output - -1 not enough parameters |
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* - 0 if not an integer number, else the number |
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* side effects - none |
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* Originally written by Dianora (Diane, db@db.net) |
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*/ |
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time_t |
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valid_tkline(const char *in, int minutes) |
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{ |
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time_t result = 0; |
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const unsigned char *p = (const unsigned char *)in; |
| 357 |
|
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for (; *p != '\0'; ++p) |
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{ |
| 360 |
if (!IsDigit(*p)) |
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return 0; |
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|
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result *= 10; |
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result += (*p & 0xF); |
| 365 |
} |
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|
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/* |
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* In the degenerate case where oper does a /quote kline 0 user@host :reason |
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* i.e. they specifically use 0, I am going to return 1 instead |
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* as a return value of non-zero is used to flag it as a temporary kline |
| 371 |
*/ |
| 372 |
if (result == 0) |
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result = 1; |
| 374 |
|
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/* |
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* If the incoming time is in seconds convert it to minutes for the purpose |
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* of this calculation |
| 378 |
*/ |
| 379 |
if (!minutes) |
| 380 |
result = result / (time_t)60; |
| 381 |
|
| 382 |
if (result > MAX_TDKLINE_TIME) |
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result = MAX_TDKLINE_TIME; |
| 384 |
|
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result = result * (time_t)60; /* turn it into seconds */ |
| 386 |
|
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return result; |
| 388 |
} |
| 389 |
|
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/* valid_wild_card() |
| 391 |
* |
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* input - pointer to client |
| 393 |
* - int flag, 0 for no warning oper 1 for warning oper |
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* - count of following varargs to check |
| 395 |
* output - 0 if not valid, 1 if valid |
| 396 |
* side effects - NOTICE is given to source_p if warn is 1 |
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*/ |
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int |
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valid_wild_card(struct Client *source_p, int warn, int count, ...) |
| 400 |
{ |
| 401 |
char *p; |
| 402 |
char tmpch; |
| 403 |
int nonwild = 0; |
| 404 |
va_list args; |
| 405 |
|
| 406 |
/* |
| 407 |
* Now we must check the user and host to make sure there |
| 408 |
* are at least NONWILDCHARS non-wildcard characters in |
| 409 |
* them, otherwise assume they are attempting to kline |
| 410 |
* *@* or some variant of that. This code will also catch |
| 411 |
* people attempting to kline *@*.tld, as long as NONWILDCHARS |
| 412 |
* is greater than 3. In that case, there are only 3 non-wild |
| 413 |
* characters (tld), so if NONWILDCHARS is 4, the kline will |
| 414 |
* be disallowed. |
| 415 |
* -wnder |
| 416 |
*/ |
| 417 |
va_start(args, count); |
| 418 |
|
| 419 |
while (count--) |
| 420 |
{ |
| 421 |
p = va_arg(args, char *); |
| 422 |
if (p == NULL) |
| 423 |
continue; |
| 424 |
|
| 425 |
while ((tmpch = *p++)) |
| 426 |
{ |
| 427 |
if (!IsKWildChar(tmpch)) |
| 428 |
{ |
| 429 |
/* |
| 430 |
* If we find enough non-wild characters, we can |
| 431 |
* break - no point in searching further. |
| 432 |
*/ |
| 433 |
if (++nonwild >= General.min_nonwildcard) |
| 434 |
return 1; |
| 435 |
} |
| 436 |
} |
| 437 |
} |
| 438 |
|
| 439 |
if (warn) |
| 440 |
sendto_one(source_p, ":%s NOTICE %s :Please include at least %d " |
| 441 |
"non-wildcard characters with the mask", |
| 442 |
me.name, source_p->name, General.min_nonwildcard); |
| 443 |
return 0; |
| 444 |
} |
