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/*
* IRC - Internet Relay Chat, ircd/gline.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Finland
*
* 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 2, 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.
*/
/** @file
* @brief Implementation of Gline manipulation functions.
* @version $Id: gline.c,v 1.61.2.1 2006/06/09 02:12:25 entrope Exp $
*/
#include "config.h"
#include "gline.h"
#include "client.h"
#include "ircd.h"
#include "ircd_alloc.h"
#include "ircd_features.h"
#include "ircd_log.h"
#include "ircd_reply.h"
#include "ircd_snprintf.h"
#include "ircd_string.h"
#include "match.h"
#include "numeric.h"
#include "s_bsd.h"
#include "s_debug.h"
#include "s_misc.h"
#include "s_stats.h"
#include "send.h"
#include "struct.h"
#include "msg.h"
#include "numnicks.h"
#include "numeric.h"
#include "whocmds.h"
/* #include <assert.h> -- Now using assert in ircd_log.h */
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define CHECK_APPROVED 0 /**< Mask is acceptable */
#define CHECK_OVERRIDABLE 1 /**< Mask is acceptable, but not by default */
#define CHECK_REJECTED 2 /**< Mask is totally unacceptable */
#define MASK_WILD_0 0x01 /**< Wildcards in the last position */
#define MASK_WILD_1 0x02 /**< Wildcards in the next-to-last position */
#define MASK_WILD_MASK 0x03 /**< Mask out the positional wildcards */
#define MASK_WILDS 0x10 /**< Mask contains wildcards */
#define MASK_IP 0x20 /**< Mask is an IP address */
#define MASK_HALT 0x40 /**< Finished processing mask */
/** List of user G-lines. */
struct Gline* GlobalGlineList = 0;
/** List of BadChan G-lines. */
struct Gline* BadChanGlineList = 0;
/** Find canonical user and host for a string.
* If \a userhost starts with '$', assign \a userhost to *user_p and NULL to *host_p.
* Otherwise, if \a userhost contains '@', assign the earlier part of it to *user_p and the rest to *host_p.
* Otherwise, assign \a def_user to *user_p and \a userhost to *host_p.
*
* @param[in] userhost Input string from user.
* @param[out] user_p Gets pointer to user (or channel/realname) part of hostmask.
* @param[out] host_p Gets point to host part of hostmask (may be assigned NULL).
* @param[in] def_user Default value for user part.
*/
static void
canon_userhost(char *userhost, char **user_p, char **host_p, char *def_user)
{
char *tmp;
if (*userhost == '$') {
*user_p = userhost;
*host_p = NULL;
return;
}
if (!(tmp = strchr(userhost, '@'))) {
*user_p = def_user;
*host_p = userhost;
} else {
*user_p = userhost;
*(tmp++) = '\0';
*host_p = tmp;
}
}
/** Create a Gline structure.
* @param[in] user User part of mask.
* @param[in] host Host part of mask (NULL if not applicable).
* @param[in] reason Reason for G-line.
* @param[in] expire Expiration timestamp.
* @param[in] lastmod Last modification timestamp.
* @param[in] flags Bitwise combination of GLINE_* bits.
* @return Newly allocated G-line.
*/
static struct Gline *
make_gline(char *user, char *host, char *reason, time_t expire, time_t lastmod,
unsigned int flags)
{
struct Gline *gline, *sgline, *after = 0;
if (!(flags & GLINE_BADCHAN)) { /* search for overlapping glines first */
for (gline = GlobalGlineList; gline; gline = sgline) {
sgline = gline->gl_next;
if (gline->gl_expire <= CurrentTime)
gline_free(gline);
else if (((gline->gl_flags & GLINE_LOCAL) != (flags & GLINE_LOCAL)) ||
(gline->gl_host && !host) || (!gline->gl_host && host))
continue;
else if (!mmatch(gline->gl_user, user) /* gline contains new mask */
&& (gline->gl_host == NULL || !mmatch(gline->gl_host, host))) {
if (expire <= gline->gl_expire) /* will expire before wider gline */
return 0;
else
after = gline; /* stick new gline after this one */
} else if (!mmatch(user, gline->gl_user) /* new mask contains gline */
&& (gline->gl_host==NULL || !mmatch(host, gline->gl_host))
&& gline->gl_expire <= expire) /* old expires before new */
gline_free(gline); /* save some memory */
}
}
gline = (struct Gline *)MyMalloc(sizeof(struct Gline)); /* alloc memory */
assert(0 != gline);
DupString(gline->gl_reason, reason); /* initialize gline... */
gline->gl_expire = expire;
gline->gl_lastmod = lastmod;
gline->gl_flags = flags & GLINE_MASK;
if (flags & GLINE_BADCHAN) { /* set a BADCHAN gline */
DupString(gline->gl_user, user); /* first, remember channel */
gline->gl_host = 0;
gline->gl_next = BadChanGlineList; /* then link it into list */
gline->gl_prev_p = &BadChanGlineList;
if (BadChanGlineList)
BadChanGlineList->gl_prev_p = &gline->gl_next;
BadChanGlineList = gline;
} else {
DupString(gline->gl_user, user); /* remember them... */
if (*user != '$')
DupString(gline->gl_host, host);
else
gline->gl_host = NULL;
if (*user != '$' && ipmask_parse(host, &gline->gl_addr, &gline->gl_bits))
gline->gl_flags |= GLINE_IPMASK;
if (after) {
gline->gl_next = after->gl_next;
gline->gl_prev_p = &after->gl_next;
if (after->gl_next)
after->gl_next->gl_prev_p = &gline->gl_next;
after->gl_next = gline;
} else {
gline->gl_next = GlobalGlineList; /* then link it into list */
gline->gl_prev_p = &GlobalGlineList;
if (GlobalGlineList)
GlobalGlineList->gl_prev_p = &gline->gl_next;
GlobalGlineList = gline;
}
}
return gline;
}
/** Check local clients against a new G-line.
* If the G-line is inactive or a badchan, return immediately.
* Otherwise, if any users match it, disconnect them.
* @param[in] cptr Peer connect that sent the G-line.
* @param[in] sptr Client that originated the G-line.
* @param[in] gline New G-line to check.
* @return Zero, unless \a sptr G-lined himself, in which case CPTR_KILLED.
*/
static int
do_gline(struct Client *cptr, struct Client *sptr, struct Gline *gline)
{
struct Client *acptr;
int fd, retval = 0, tval;
if (GlineIsBadChan(gline)) /* no action taken on badchan glines */
return 0;
if (!GlineIsActive(gline)) /* no action taken on inactive glines */
return 0;
for (fd = HighestFd; fd >= 0; --fd) {
/*
* get the users!
*/
if ((acptr = LocalClientArray[fd])) {
if (!cli_user(acptr))
continue;
if (GlineIsRealName(gline)) { /* Realname Gline */
Debug((DEBUG_DEBUG,"Realname Gline: %s %s",(cli_info(acptr)),
gline->gl_user+2));
if (match(gline->gl_user+2, cli_info(acptr)) != 0)
continue;
Debug((DEBUG_DEBUG,"Matched!"));
} else { /* Host/IP gline */
if (cli_user(acptr)->username &&
match(gline->gl_user, (cli_user(acptr))->username) != 0)
continue;
if (GlineIsIpMask(gline)) {
if (!ipmask_check(&cli_ip(acptr), &gline->gl_addr, gline->gl_bits))
continue;
}
else {
if (match(gline->gl_host, cli_sockhost(acptr)) != 0)
continue;
}
}
/* ok, here's one that got G-lined */
send_reply(acptr, SND_EXPLICIT | ERR_YOUREBANNEDCREEP, ":%s",
gline->gl_reason);
/* let the ops know about it */
sendto_opmask_butone(0, SNO_GLINE, "G-line active for %s",
get_client_name(acptr, SHOW_IP));
/* and get rid of him */
if ((tval = exit_client_msg(cptr, acptr, &me, "G-lined (%s)",
gline->gl_reason)))
retval = tval; /* retain killed status */
}
}
return retval;
}
/**
* Implements the mask checking applied to local G-lines.
* Basically, host masks must have a minimum of two non-wild domain
* fields, and IP masks must have a minimum of 16 bits. If the mask
* has even one wild-card, OVERRIDABLE is returned, assuming the other
* check doesn't fail.
* @param[in] mask G-line mask to check.
* @return One of CHECK_REJECTED, CHECK_OVERRIDABLE, or CHECK_APPROVED.
*/
static int
gline_checkmask(char *mask)
{
unsigned int flags = MASK_IP;
unsigned int dots = 0;
unsigned int ipmask = 0;
for (; *mask; mask++) { /* go through given mask */
if (*mask == '.') { /* it's a separator; advance positional wilds */
flags = (flags & ~MASK_WILD_MASK) | ((flags << 1) & MASK_WILD_MASK);
dots++;
if ((flags & (MASK_IP | MASK_WILDS)) == MASK_IP)
ipmask += 8; /* It's an IP with no wilds, count bits */
} else if (*mask == '*' || *mask == '?')
flags |= MASK_WILD_0 | MASK_WILDS; /* found a wildcard */
else if (*mask == '/') { /* n.n.n.n/n notation; parse bit specifier */
++mask;
ipmask = strtoul(mask, &mask, 10);
/* sanity-check to date */
if (*mask || (flags & (MASK_WILDS | MASK_IP)) != MASK_IP)
return CHECK_REJECTED;
if (!dots) {
if (ipmask > 128)
return CHECK_REJECTED;
if (ipmask < 128)
flags |= MASK_WILDS;
} else {
if (dots != 3 || ipmask > 32)
return CHECK_REJECTED;
if (ipmask < 32)
flags |= MASK_WILDS;
}
flags |= MASK_HALT; /* Halt the ipmask calculation */
break; /* get out of the loop */
} else if (!IsIP6Char(*mask)) {
flags &= ~MASK_IP; /* not an IP anymore! */
ipmask = 0;
}
}
/* Sanity-check quads */
if (dots > 3 || (!(flags & MASK_WILDS) && dots < 3)) {
flags &= ~MASK_IP;
ipmask = 0;
}
/* update bit count if necessary */
if ((flags & (MASK_IP | MASK_WILDS | MASK_HALT)) == MASK_IP)
ipmask += 8;
/* Check to see that it's not too wide of a mask */
if (flags & MASK_WILDS &&
((!(flags & MASK_IP) && (dots < 2 || flags & MASK_WILD_MASK)) ||
(flags & MASK_IP && ipmask < 16)))
return CHECK_REJECTED; /* to wide, reject */
/* Ok, it's approved; require override if it has wildcards, though */
return flags & MASK_WILDS ? CHECK_OVERRIDABLE : CHECK_APPROVED;
}
/** Forward a G-line to other servers.
* @param[in] cptr Client that sent us the G-line.
* @param[in] sptr Client that originated the G-line.
* @param[in] gline G-line to forward.
* @return Zero.
*/
int
gline_propagate(struct Client *cptr, struct Client *sptr, struct Gline *gline)
{
if (GlineIsLocal(gline) || (IsUser(sptr) && !gline->gl_lastmod))
return 0;
if (gline->gl_lastmod)
sendcmdto_serv_butone(sptr, CMD_GLINE, cptr, "* %c%s%s%s %Tu %Tu :%s",
GlineIsRemActive(gline) ? '+' : '-', gline->gl_user,
gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire - CurrentTime, gline->gl_lastmod,
gline->gl_reason);
else
sendcmdto_serv_butone(sptr, CMD_GLINE, cptr,
(GlineIsRemActive(gline) ?
"* +%s%s%s %Tu :%s" : "* -%s%s%s"),
gline->gl_user,
gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire - CurrentTime, gline->gl_reason);
return 0;
}
/** Create a new G-line and add it to global lists.
* \a userhost may be in one of four forms:
* \li A channel name, to add a BadChan.
* \li A string starting with $R and followed by a mask to match against their realname.
* \li A user\@IP mask (user\@ part optional) to create an IP-based ban.
* \li A user\@host mask (user\@ part optional) to create a hostname ban.
*
* @param[in] cptr Client that sent us the G-line.
* @param[in] sptr Client that originated the G-line.
* @param[in] userhost Text mask for the G-line.
* @param[in] reason Reason for G-line.
* @param[in] expire Duration of G-line in seconds.
* @param[in] lastmod Last modification time of G-line.
* @param[in] flags Bitwise combination of GLINE_* flags.
* @return Zero or CPTR_KILLED, depending on whether \a sptr is suicidal.
*/
int
gline_add(struct Client *cptr, struct Client *sptr, char *userhost,
char *reason, time_t expire, time_t lastmod, unsigned int flags)
{
struct Gline *agline;
char uhmask[USERLEN + HOSTLEN + 2];
char *user, *host;
int tmp;
assert(0 != userhost);
assert(0 != reason);
if (*userhost == '#' || *userhost == '&') {
if ((flags & GLINE_LOCAL) && !HasPriv(sptr, PRIV_LOCAL_BADCHAN))
return send_reply(sptr, ERR_NOPRIVILEGES);
flags |= GLINE_BADCHAN;
user = userhost;
host = 0;
} else if (*userhost == '$') {
switch (*userhost == '$' ? userhost[1] : userhost[3]) {
case 'R': flags |= GLINE_REALNAME; break;
default:
/* uh, what to do here? */
/* The answer, my dear Watson, is we throw a protocol_violation()
-- hikari */
if (IsServer(cptr))
return protocol_violation(sptr,"%s has been smoking the sweet leaf and sent me a whacky gline",cli_name(sptr));
else {
sendto_opmask_butone(NULL, SNO_GLINE, "%s has been smoking the sweet leaf and sent me a whacky gline", cli_name(sptr));
return 0;
}
break;
}
user = (*userhost =='$' ? userhost : userhost+2);
host = 0;
} else {
canon_userhost(userhost, &user, &host, "*");
if (sizeof(uhmask) <
ircd_snprintf(0, uhmask, sizeof(uhmask), "%s@%s", user, host))
return send_reply(sptr, ERR_LONGMASK);
else if (MyUser(sptr) || (IsUser(sptr) && flags & GLINE_LOCAL)) {
switch (gline_checkmask(host)) {
case CHECK_OVERRIDABLE: /* oper overrided restriction */
if (flags & GLINE_OPERFORCE)
break;
/*FALLTHROUGH*/
case CHECK_REJECTED:
return send_reply(sptr, ERR_MASKTOOWIDE, uhmask);
break;
}
if ((tmp = count_users(uhmask)) >=
feature_int(FEAT_GLINEMAXUSERCOUNT) && !(flags & GLINE_OPERFORCE))
return send_reply(sptr, ERR_TOOMANYUSERS, tmp);
}
}
/*
* You cannot set a negative (or zero) expire time, nor can you set an
* expiration time for greater than GLINE_MAX_EXPIRE.
*/
if (!(flags & GLINE_FORCE) && (expire <= 0 || expire > GLINE_MAX_EXPIRE)) {
if (!IsServer(sptr) && MyConnect(sptr))
send_reply(sptr, ERR_BADEXPIRE, expire);
return 0;
}
expire += CurrentTime; /* convert from lifetime to timestamp */
/* Inform ops... */
sendto_opmask_butone(0, ircd_strncmp(reason, "AUTO", 4) ? SNO_GLINE :
SNO_AUTO, "%s adding %s %s for %s%s%s, expiring at "
"%Tu: %s",
(feature_bool(FEAT_HIS_SNOTICES) || IsServer(sptr)) ?
cli_name(sptr) :
cli_name((cli_user(sptr))->server),
(flags & GLINE_LOCAL) ? "local" : "global",
(flags & GLINE_BADCHAN) ? "BADCHAN" : "GLINE", user,
(flags & (GLINE_BADCHAN|GLINE_REALNAME)) ? "" : "@",
(flags & (GLINE_BADCHAN|GLINE_REALNAME)) ? "" : host,
expire + TSoffset, reason);
/* and log it */
log_write(LS_GLINE, L_INFO, LOG_NOSNOTICE,
"%#C adding %s %s for %s%s%s, expiring at %Tu: %s", sptr,
flags & GLINE_LOCAL ? "local" : "global",
flags & GLINE_BADCHAN ? "BADCHAN" : "GLINE", user,
flags & (GLINE_BADCHAN|GLINE_REALNAME) ? "" : "@",
flags & (GLINE_BADCHAN|GLINE_REALNAME) ? "" : host,
expire + TSoffset, reason);
/* make the gline */
agline = make_gline(user, host, reason, expire, lastmod, flags);
if (!agline) /* if it overlapped, silently return */
return 0;
gline_propagate(cptr, sptr, agline);
return do_gline(cptr, sptr, agline); /* knock off users if necessary */
}
/** Activate a currently inactive G-line.
* @param[in] cptr Peer that told us to activate the G-line.
* @param[in] sptr Client that originally thought it was a good idea.
* @param[in] gline G-line to activate.
* @param[in] lastmod New value for last modification timestamp.
* @param[in] flags 0 if the activation should be propagated, GLINE_LOCAL if not.
* @return Zero, unless \a sptr had a death wish (in which case CPTR_KILLED).
*/
int
gline_activate(struct Client *cptr, struct Client *sptr, struct Gline *gline,
time_t lastmod, unsigned int flags)
{
unsigned int saveflags = 0;
assert(0 != gline);
saveflags = gline->gl_flags;
if (flags & GLINE_LOCAL)
gline->gl_flags &= ~GLINE_LDEACT;
else {
gline->gl_flags |= GLINE_ACTIVE;
if (gline->gl_lastmod) {
if (gline->gl_lastmod >= lastmod) /* force lastmod to increase */
gline->gl_lastmod++;
else
gline->gl_lastmod = lastmod;
}
}
if ((saveflags & GLINE_ACTMASK) == GLINE_ACTIVE)
return 0; /* was active to begin with */
/* Inform ops and log it */
sendto_opmask_butone(0, SNO_GLINE, "%s activating global %s for %s%s%s, "
"expiring at %Tu: %s",
(feature_bool(FEAT_HIS_SNOTICES) || IsServer(sptr)) ?
cli_name(sptr) :
cli_name((cli_user(sptr))->server),
GlineIsBadChan(gline) ? "BADCHAN" : "GLINE",
gline->gl_user, gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire + TSoffset, gline->gl_reason);
log_write(LS_GLINE, L_INFO, LOG_NOSNOTICE,
"%#C activating global %s for %s%s%s, expiring at %Tu: %s", sptr,
GlineIsBadChan(gline) ? "BADCHAN" : "GLINE", gline->gl_user,
gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire + TSoffset, gline->gl_reason);
if (!(flags & GLINE_LOCAL)) /* don't propagate local changes */
gline_propagate(cptr, sptr, gline);
return do_gline(cptr, sptr, gline);
}
/** Deactivate a G-line.
* @param[in] cptr Peer that gave us the message.
* @param[in] sptr Client that initiated the deactivation.
* @param[in] gline G-line to deactivate.
* @param[in] lastmod New value for G-line last modification timestamp.
* @param[in] flags GLINE_LOCAL to only deactivate locally, 0 to propagate.
* @return Zero.
*/
int
gline_deactivate(struct Client *cptr, struct Client *sptr, struct Gline *gline,
time_t lastmod, unsigned int flags)
{
unsigned int saveflags = 0;
char *msg;
assert(0 != gline);
saveflags = gline->gl_flags;
if (GlineIsLocal(gline))
msg = "removing local";
else if (!gline->gl_lastmod && !(flags & GLINE_LOCAL)) {
msg = "removing global";
gline->gl_flags &= ~GLINE_ACTIVE; /* propagate a -<mask> */
} else {
msg = "deactivating global";
if (flags & GLINE_LOCAL)
gline->gl_flags |= GLINE_LDEACT;
else {
gline->gl_flags &= ~GLINE_ACTIVE;
if (gline->gl_lastmod) {
if (gline->gl_lastmod >= lastmod)
gline->gl_lastmod++;
else
gline->gl_lastmod = lastmod;
}
}
if ((saveflags & GLINE_ACTMASK) != GLINE_ACTIVE)
return 0; /* was inactive to begin with */
}
/* Inform ops and log it */
sendto_opmask_butone(0, SNO_GLINE, "%s %s %s for %s%s%s, expiring at %Tu: "
"%s",
(feature_bool(FEAT_HIS_SNOTICES) || IsServer(sptr)) ?
cli_name(sptr) :
cli_name((cli_user(sptr))->server),
msg, GlineIsBadChan(gline) ? "BADCHAN" : "GLINE",
gline->gl_user, gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire + TSoffset, gline->gl_reason);
log_write(LS_GLINE, L_INFO, LOG_NOSNOTICE,
"%#C %s %s for %s%s%s, expiring at %Tu: %s", sptr, msg,
GlineIsBadChan(gline) ? "BADCHAN" : "GLINE", gline->gl_user,
gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire + TSoffset, gline->gl_reason);
if (!(flags & GLINE_LOCAL)) /* don't propagate local changes */
gline_propagate(cptr, sptr, gline);
/* if it's a local gline or a Uworld gline (and not locally deactivated).. */
if (GlineIsLocal(gline) || (!gline->gl_lastmod && !(flags & GLINE_LOCAL)))
gline_free(gline); /* get rid of it */
return 0;
}
/** Find a G-line for a particular mask, guided by certain flags.
* Certain bits in \a flags are interpreted specially:
* <dl>
* <dt>GLINE_ANY</dt><dd>Search both BadChans and user G-lines.</dd>
* <dt>GLINE_BADCHAN</dt><dd>Search BadChans.</dd>
* <dt>GLINE_GLOBAL</dt><dd>Only match global G-lines.</dd>
* <dt>GLINE_LASTMOD</dt><dd>Only match G-lines with a last modification time.</dd>
* <dt>GLINE_EXACT</dt><dd>Require an exact match of G-line mask.</dd>
* <dt>anything else</dt><dd>Search user G-lines.</dd>
* </dl>
* @param[in] userhost Mask to search for.
* @param[in] flags Bitwise combination of GLINE_* flags.
* @return First matching G-line, or NULL if none are found.
*/
struct Gline *
gline_find(char *userhost, unsigned int flags)
{
struct Gline *gline;
struct Gline *sgline;
char *user, *host, *t_uh;
if (flags & (GLINE_BADCHAN | GLINE_ANY)) {
for (gline = BadChanGlineList; gline; gline = sgline) {
sgline = gline->gl_next;
if (gline->gl_expire <= CurrentTime)
gline_free(gline);
else if ((flags & GLINE_GLOBAL && gline->gl_flags & GLINE_LOCAL) ||
(flags & GLINE_LASTMOD && !gline->gl_lastmod))
continue;
else if ((flags & GLINE_EXACT ? ircd_strcmp(gline->gl_user, userhost) :
match(gline->gl_user, userhost)) == 0)
return gline;
}
}
if ((flags & (GLINE_BADCHAN | GLINE_ANY)) == GLINE_BADCHAN ||
*userhost == '#' || *userhost == '&')
return 0;
DupString(t_uh, userhost);
canon_userhost(t_uh, &user, &host, "*");
for (gline = GlobalGlineList; gline; gline = sgline) {
sgline = gline->gl_next;
if (gline->gl_expire <= CurrentTime)
gline_free(gline);
else if ((flags & GLINE_GLOBAL && gline->gl_flags & GLINE_LOCAL) ||
(flags & GLINE_LASTMOD && !gline->gl_lastmod))
continue;
else if (flags & GLINE_EXACT) {
if (((gline->gl_host && host && ircd_strcmp(gline->gl_host, host) == 0)
|| (!gline->gl_host && !host)) &&
(ircd_strcmp(gline->gl_user, user) == 0))
break;
} else {
if (((gline->gl_host && host && match(gline->gl_host, host) == 0)
|| (!gline->gl_host && !host)) &&
(match(gline->gl_user, user) == 0))
break;
}
}
MyFree(t_uh);
return gline;
}
/** Find a matching G-line for a user.
* @param[in] cptr Client to compare against.
* @param[in] flags Bitwise combination of GLINE_GLOBAL and/or
* GLINE_LASTMOD to limit matches.
* @return Matching G-line, or NULL if none are found.
*/
struct Gline *
gline_lookup(struct Client *cptr, unsigned int flags)
{
struct Gline *gline;
struct Gline *sgline;
for (gline = GlobalGlineList; gline; gline = sgline) {
sgline = gline->gl_next;
if (gline->gl_expire <= CurrentTime) {
gline_free(gline);
continue;
}
if ((flags & GLINE_GLOBAL && gline->gl_flags & GLINE_LOCAL) ||
(flags & GLINE_LASTMOD && !gline->gl_lastmod))
continue;
if (GlineIsRealName(gline)) {
Debug((DEBUG_DEBUG,"realname gline: '%s' '%s'",gline->gl_user,cli_info(cptr)));
if (match(gline->gl_user+2, cli_info(cptr)) != 0)
continue;
}
else {
if (match(gline->gl_user, (cli_user(cptr))->username) != 0)
continue;
if (GlineIsIpMask(gline)) {
if (!ipmask_check(&cli_ip(cptr), &gline->gl_addr, gline->gl_bits))
continue;
}
else {
if (match(gline->gl_host, (cli_user(cptr))->realhost) != 0)
continue;
}
}
if (GlineIsActive(gline))
return gline;
}
/*
* No Glines matched
*/
return 0;
}
/** Delink and free a G-line.
* @param[in] gline G-line to free.
*/
void
gline_free(struct Gline *gline)
{
assert(0 != gline);
*gline->gl_prev_p = gline->gl_next; /* squeeze this gline out */
if (gline->gl_next)
gline->gl_next->gl_prev_p = gline->gl_prev_p;
MyFree(gline->gl_user); /* free up the memory */
if (gline->gl_host)
MyFree(gline->gl_host);
MyFree(gline->gl_reason);
MyFree(gline);
}
/** Burst all known global G-lines to another server.
* @param[in] cptr Destination of burst.
*/
void
gline_burst(struct Client *cptr)
{
struct Gline *gline;
struct Gline *sgline;
for (gline = GlobalGlineList; gline; gline = sgline) { /* all glines */
sgline = gline->gl_next;
if (gline->gl_expire <= CurrentTime) /* expire any that need expiring */
gline_free(gline);
else if (!GlineIsLocal(gline) && gline->gl_lastmod)
sendcmdto_one(&me, CMD_GLINE, cptr, "* %c%s%s%s %Tu %Tu :%s",
GlineIsRemActive(gline) ? '+' : '-', gline->gl_user,
gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire - CurrentTime, gline->gl_lastmod,
gline->gl_reason);
}
for (gline = BadChanGlineList; gline; gline = sgline) { /* all glines */
sgline = gline->gl_next;
if (gline->gl_expire <= CurrentTime) /* expire any that need expiring */
gline_free(gline);
else if (!GlineIsLocal(gline) && gline->gl_lastmod)
sendcmdto_one(&me, CMD_GLINE, cptr, "* %c%s %Tu %Tu :%s",
GlineIsRemActive(gline) ? '+' : '-', gline->gl_user,
gline->gl_expire - CurrentTime, gline->gl_lastmod,
gline->gl_reason);
}
}
/** Send a G-line to another server.
* @param[in] cptr Who to inform of the G-line.
* @param[in] gline G-line to send.
* @return Zero.
*/
int
gline_resend(struct Client *cptr, struct Gline *gline)
{
if (GlineIsLocal(gline) || !gline->gl_lastmod)
return 0;
sendcmdto_one(&me, CMD_GLINE, cptr, "* %c%s%s%s %Tu %Tu :%s",
GlineIsRemActive(gline) ? '+' : '-', gline->gl_user,
gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire - CurrentTime, gline->gl_lastmod,
gline->gl_reason);
return 0;
}
/** Display one or all G-lines to a user.
* If \a userhost is not NULL, only send the first matching G-line.
* Otherwise send the whole list.
* @param[in] sptr User asking for G-line list.
* @param[in] userhost G-line mask to search for (or NULL).
* @return Zero.
*/
int
gline_list(struct Client *sptr, char *userhost)
{
struct Gline *gline;
struct Gline *sgline;
if (userhost) {
if (!(gline = gline_find(userhost, GLINE_ANY))) /* no such gline */
return send_reply(sptr, ERR_NOSUCHGLINE, userhost);
/* send gline information along */
send_reply(sptr, RPL_GLIST, gline->gl_user,
gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire + TSoffset,
GlineIsLocal(gline) ? cli_name(&me) : "*",
GlineIsActive(gline) ? '+' : '-', gline->gl_reason);
} else {
for (gline = GlobalGlineList; gline; gline = sgline) {
sgline = gline->gl_next;
if (gline->gl_expire <= CurrentTime)
gline_free(gline);
else
send_reply(sptr, RPL_GLIST, gline->gl_user,
gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire + TSoffset,
GlineIsLocal(gline) ? cli_name(&me) : "*",
GlineIsActive(gline) ? '+' : '-', gline->gl_reason);
}
for (gline = BadChanGlineList; gline; gline = sgline) {
sgline = gline->gl_next;
if (gline->gl_expire <= CurrentTime)
gline_free(gline);
else
send_reply(sptr, RPL_GLIST, gline->gl_user, "", "",
gline->gl_expire + TSoffset,
GlineIsLocal(gline) ? cli_name(&me) : "*",
GlineIsActive(gline) ? '+' : '-', gline->gl_reason);
}
}
/* end of gline information */
return send_reply(sptr, RPL_ENDOFGLIST);
}
/** Statistics callback to list G-lines.
* @param[in] sptr Client requesting statistics.
* @param[in] sd Stats descriptor for request (ignored).
* @param[in] param Extra parameter from user (ignored).
*/
void
gline_stats(struct Client *sptr, const struct StatDesc *sd,
char *param)
{
struct Gline *gline;
struct Gline *sgline;
for (gline = GlobalGlineList; gline; gline = sgline) {
sgline = gline->gl_next;
if (gline->gl_expire <= CurrentTime)
gline_free(gline);
else
send_reply(sptr, RPL_STATSGLINE, 'G', gline->gl_user,
gline->gl_host ? "@" : "",
gline->gl_host ? gline->gl_host : "",
gline->gl_expire + TSoffset,
GlineIsActive(gline) ? '+' : '-',
gline->gl_reason);
}
}
/** Calculate memory used by G-lines.
* @param[out] gl_size Number of bytes used by G-lines.
* @return Number of G-lines in use.
*/
int
gline_memory_count(size_t *gl_size)
{
struct Gline *gline;
unsigned int gl = 0;
for (gline = GlobalGlineList; gline; gline = gline->gl_next)
{
gl++;
*gl_size += sizeof(struct Gline);
*gl_size += gline->gl_user ? (strlen(gline->gl_user) + 1) : 0;
*gl_size += gline->gl_host ? (strlen(gline->gl_host) + 1) : 0;
*gl_size += gline->gl_reason ? (strlen(gline->gl_reason) + 1) : 0;
}
return gl;
}
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