/*
* IRC - Internet Relay Chat, ircd/channel.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Co Center
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: channel.c,v 1.73.2.15 2004/01/11 00:23:32 isomer Exp $
*/
#include "config.h"
#include "channel.h"
#include "client.h"
#include "hash.h"
#include "ircd.h"
#include "ircd_alloc.h"
#include "ircd_chattr.h"
#include "ircd_defs.h"
#include "ircd_features.h"
#include "ircd_log.h"
#include "ircd_reply.h"
#include "ircd_snprintf.h"
#include "ircd_string.h"
#include "list.h"
#include "match.h"
#include "msg.h"
#include "msgq.h"
#include "numeric.h"
#include "numnicks.h"
#include "querycmds.h"
#include "s_bsd.h"
#include "s_conf.h"
#include "s_debug.h"
#include "s_misc.h"
#include "s_user.h"
#include "send.h"
#include "struct.h"
#include "support.h"
#include "sys.h"
#include "whowas.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct Channel* GlobalChannelList = 0;
static unsigned int membershipAllocCount;
static struct Membership* membershipFreeList;
void del_invite(struct Client *, struct Channel *);
const char* const PartFmt1 = ":%s " MSG_PART " %s";
const char* const PartFmt2 = ":%s " MSG_PART " %s :%s";
const char* const PartFmt1serv = "%s%s " TOK_PART " %s";
const char* const PartFmt2serv = "%s%s " TOK_PART " %s :%s";
static struct SLink* next_ban;
static struct SLink* prev_ban;
static struct SLink* removed_bans_list;
/*
* Use a global variable to remember if an oper set a mode on a local channel. Ugly,
* but the only way to do it without changing set_mode intensively.
*/
int LocalChanOperMode = 0;
#if !defined(NDEBUG)
/*
* return the length (>=0) of a chain of links.
*/
static int list_length(struct SLink *lp)
{
int count = 0;
for (; lp; lp = lp->next)
++count;
return count;
}
#endif
struct Membership* find_member_link(struct Channel* chptr, const struct Client* cptr)
{
struct Membership *m;
assert(0 != cptr);
assert(0 != chptr);
/* Servers don't have member links */
if (IsServer(cptr)||IsMe(cptr))
return 0;
/* +k users are typically on a LOT of channels. So we iterate over who
* is in the channel. X/W are +k and are in about 5800 channels each.
* however there are typically no more than 1000 people in a channel
* at a time.
*/
if (IsChannelService(cptr)) {
m = chptr->members;
while (m) {
assert(m->channel == chptr);
if (m->user == cptr)
return m;
m = m->next_member;
}
}
/* Users on the other hand aren't allowed on more than 15 channels. 50%
* of users that are on channels are on 2 or less, 95% are on 7 or less,
* and 99% are on 10 or less.
*/
else {
m = (cli_user(cptr))->channel;
while (m) {
assert(m->user == cptr);
if (m->channel == chptr)
return m;
m = m->next_channel;
}
}
return 0;
}
/*
* find_chasing - Find the client structure for a nick name (user)
* using history mechanism if necessary. If the client is not found, an error
* message (NO SUCH NICK) is generated. If the client was found
* through the history, chasing will be 1 and otherwise 0.
*/
struct Client* find_chasing(struct Client* sptr, const char* user, int* chasing)
{
struct Client* who = FindClient(user);
if (chasing)
*chasing = 0;
if (who)
return who;
if (!(who = get_history(user, feature_int(FEAT_KILLCHASETIMELIMIT)))) {
send_reply(sptr, ERR_NOSUCHNICK, user);
return 0;
}
if (chasing)
*chasing = 1;
return who;
}
/*
* Create a string of form "foo!bar@fubar" given foo, bar and fubar
* as the parameters. If NULL, they become "*".
*/
#define NUH_BUFSIZE (NICKLEN + USERLEN + HOSTLEN + 3)
static char *make_nick_user_host(char *namebuf, const char *nick,
const char *name, const char *host)
{
ircd_snprintf(0, namebuf, NUH_BUFSIZE, "%s!%s@%s", nick, name, host);
return namebuf;
}
/*
* Create a string of form "foo!bar@123.456.789.123" given foo, bar and the
* IP-number as the parameters. If NULL, they become "*".
*/
#define NUI_BUFSIZE (NICKLEN + USERLEN + 16 + 3)
static char *make_nick_user_ip(char *ipbuf, char *nick, char *name,
struct in_addr ip)
{
ircd_snprintf(0, ipbuf, NUI_BUFSIZE, "%s!%s@%s", nick, name,
ircd_ntoa((const char*) &ip));
return ipbuf;
}
/*
* Subtract one user from channel i (and free channel
* block, if channel became empty).
* Returns: true (1) if channel still exists
* false (0) if the channel was destroyed
*/
int sub1_from_channel(struct Channel* chptr)
{
struct SLink *tmp;
struct SLink *obtmp;
if (chptr->users > 1) /* Can be 0, called for an empty channel too */
{
assert(0 != chptr->members);
--chptr->users;
return 1;
}
assert(0 == chptr->members);
/* Channel became (or was) empty: Remove channel */
if (is_listed(chptr))
{
int i;
for (i = 0; i <= HighestFd; i++)
{
struct Client *acptr = 0;
if ((acptr = LocalClientArray[i]) && cli_listing(acptr) &&
(cli_listing(acptr))->chptr == chptr)
{
list_next_channels(acptr, 1);
break; /* Only one client can list a channel */
}
}
}
/*
* Now, find all invite links from channel structure
*/
while ((tmp = chptr->invites))
del_invite(tmp->value.cptr, chptr);
tmp = chptr->banlist;
while (tmp)
{
obtmp = tmp;
tmp = tmp->next;
MyFree(obtmp->value.ban.banstr);
MyFree(obtmp->value.ban.who);
free_link(obtmp);
}
if (chptr->prev)
chptr->prev->next = chptr->next;
else
GlobalChannelList = chptr->next;
if (chptr->next)
chptr->next->prev = chptr->prev;
hRemChannel(chptr);
--UserStats.channels;
/*
* make sure that channel actually got removed from hash table
*/
assert(chptr->hnext == chptr);
MyFree(chptr);
return 0;
}
/*
* add_banid
*
* `cptr' must be the client adding the ban.
*
* If `change' is true then add `banid' to channel `chptr'.
* Returns 0 if the ban was added.
* Returns -2 if the ban already existed and was marked CHFL_BURST_BAN_WIPEOUT.
* Return -1 otherwise.
*
* Those bans that overlapped with `banid' are flagged with CHFL_BAN_OVERLAPPED
* when `change' is false, otherwise they will be removed from the banlist.
* Subsequently calls to next_overlapped_ban() or next_removed_overlapped_ban()
* respectively will return these bans until NULL is returned.
*
* If `firsttime' is true, the ban list as returned by next_overlapped_ban()
* is reset (unless a non-zero value is returned, in which case the
* CHFL_BAN_OVERLAPPED flag might not have been reset!).
*
* --Run
*/
int add_banid(struct Client *cptr, struct Channel *chptr, char *banid,
int change, int firsttime)
{
struct SLink* ban;
struct SLink** banp;
int cnt = 0;
int removed_bans = 0;
int len = strlen(banid);
if (firsttime)
{
next_ban = NULL;
assert(0 == prev_ban);
assert(0 == removed_bans_list);
}
if (MyUser(cptr))
collapse(banid);
for (banp = &chptr->banlist; *banp;)
{
len += strlen((*banp)->value.ban.banstr);
++cnt;
if (((*banp)->flags & CHFL_BURST_BAN_WIPEOUT))
{
if (!strcmp((*banp)->value.ban.banstr, banid))
{
(*banp)->flags &= ~CHFL_BURST_BAN_WIPEOUT;
return -2;
}
}
else if (!mmatch((*banp)->value.ban.banstr, banid))
return -1;
if (!mmatch(banid, (*banp)->value.ban.banstr))
{
struct SLink *tmp = *banp;
if (change)
{
if (MyUser(cptr))
{
cnt--;
len -= strlen(tmp->value.ban.banstr);
}
*banp = tmp->next;
/* These will be sent to the user later as -b */
tmp->next = removed_bans_list;
removed_bans_list = tmp;
removed_bans = 1;
}
else if (!(tmp->flags & CHFL_BURST_BAN_WIPEOUT))
{
tmp->flags |= CHFL_BAN_OVERLAPPED;
if (!next_ban)
next_ban = tmp;
banp = &tmp->next;
}
else
banp = &tmp->next;
}
else
{
if (firsttime)
(*banp)->flags &= ~CHFL_BAN_OVERLAPPED;
banp = &(*banp)->next;
}
}
if (MyUser(cptr) && !removed_bans &&
(len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXBANS)) ||
(cnt >= feature_int(FEAT_MAXBANS))))
{
send_reply(cptr, ERR_BANLISTFULL, chptr->chname, banid);
return -1;
}
if (change)
{
char* ip_start;
struct Membership* member;
ban = make_link();
ban->next = chptr->banlist;
ban->value.ban.banstr = (char*) MyMalloc(strlen(banid) + 1);
assert(0 != ban->value.ban.banstr);
strcpy(ban->value.ban.banstr, banid);
if (feature_bool(FEAT_HIS_BANWHO) && IsServer(cptr))
DupString(ban->value.ban.who, cli_name(&me));
else
DupString(ban->value.ban.who, cli_name(cptr));
assert(0 != ban->value.ban.who);
ban->value.ban.when = TStime();
ban->flags = CHFL_BAN; /* This bit is never used I think... */
if ((ip_start = strrchr(banid, '@')) && check_if_ipmask(ip_start + 1))
ban->flags |= CHFL_BAN_IPMASK;
chptr->banlist = ban;
/*
* Erase ban-valid-bit
*/
for (member = chptr->members; member; member = member->next_member)
ClearBanValid(member); /* `ban' == channel member ! */
}
return 0;
}
struct SLink *next_removed_overlapped_ban(void)
{
struct SLink *tmp = removed_bans_list;
if (prev_ban)
{
if (prev_ban->value.ban.banstr) /* Can be set to NULL in set_mode() */
MyFree(prev_ban->value.ban.banstr);
MyFree(prev_ban->value.ban.who);
free_link(prev_ban);
prev_ban = 0;
}
if (tmp)
removed_bans_list = removed_bans_list->next;
prev_ban = tmp;
return tmp;
}
/*
* find_channel_member - returns Membership * if a person is joined and not a zombie
*/
struct Membership* find_channel_member(struct Client* cptr, struct Channel* chptr)
{
struct Membership* member;
assert(0 != chptr);
member = find_member_link(chptr, cptr);
return (member && !IsZombie(member)) ? member : 0;
}
/*
* is_banned - a non-zero value if banned else 0.
*/
static int is_banned(struct Client *cptr, struct Channel *chptr,
struct Membership* member)
{
struct SLink* tmp;
char tmphost[HOSTLEN + 1];
char nu_host[NUH_BUFSIZE];
char nu_realhost[NUH_BUFSIZE];
char nu_ip[NUI_BUFSIZE];
char* s;
char* sr = NULL;
char* ip_s = NULL;
if (!IsUser(cptr))
return 0;
if (member && IsBanValid(member))
return IsBanned(member);
s = make_nick_user_host(nu_host, cli_name(cptr), (cli_user(cptr))->username,
(cli_user(cptr))->host);
if (IsAccount(cptr)) {
if (HasHiddenHost(cptr))
sr = make_nick_user_host(nu_realhost, cli_name(cptr),
cli_user(cptr)->username,
cli_user(cptr)->realhost);
else {
ircd_snprintf(0, tmphost, HOSTLEN, "%s.%s",
cli_user(cptr)->account, feature_str(FEAT_HIDDEN_HOST));
sr = make_nick_user_host(nu_realhost, cli_name(cptr),
cli_user(cptr)->username,
tmphost);
}
}
for (tmp = chptr->banlist; tmp; tmp = tmp->next) {
if ((tmp->flags & CHFL_BAN_IPMASK)) {
if (!ip_s)
ip_s = make_nick_user_ip(nu_ip, cli_name(cptr),
(cli_user(cptr))->username, cli_ip(cptr));
if (match(tmp->value.ban.banstr, ip_s) == 0)
break;
}
else if (match(tmp->value.ban.banstr, s) == 0)
break;
else if (sr && match(tmp->value.ban.banstr, sr) == 0)
break;
}
if (member) {
SetBanValid(member);
if (tmp) {
SetBanned(member);
return 1;
}
else {
ClearBanned(member);
return 0;
}
}
return (tmp != NULL);
}
/*
* adds a user to a channel by adding another link to the channels member
* chain.
*/
void add_user_to_channel(struct Channel* chptr, struct Client* who,
unsigned int flags)
{
assert(0 != chptr);
assert(0 != who);
if (cli_user(who)) {
struct Membership* member = membershipFreeList;
if (member)
membershipFreeList = member->next_member;
else {
member = (struct Membership*) MyMalloc(sizeof(struct Membership));
++membershipAllocCount;
}
assert(0 != member);
member->user = who;
member->channel = chptr;
member->status = flags;
member->next_member = chptr->members;
if (member->next_member)
member->next_member->prev_member = member;
member->prev_member = 0;
chptr->members = member;
member->next_channel = (cli_user(who))->channel;
if (member->next_channel)
member->next_channel->prev_channel = member;
member->prev_channel = 0;
(cli_user(who))->channel = member;
++chptr->users;
++((cli_user(who))->joined);
}
}
static int remove_member_from_channel(struct Membership* member)
{
struct Channel* chptr;
assert(0 != member);
chptr = member->channel;
/*
* unlink channel member list
*/
if (member->next_member)
member->next_member->prev_member = member->prev_member;
if (member->prev_member)
member->prev_member->next_member = member->next_member;
else
member->channel->members = member->next_member;
/*
* unlink client channel list
*/
if (member->next_channel)
member->next_channel->prev_channel = member->prev_channel;
if (member->prev_channel)
member->prev_channel->next_channel = member->next_channel;
else
(cli_user(member->user))->channel = member->next_channel;
--(cli_user(member->user))->joined;
member->next_member = membershipFreeList;
membershipFreeList = member;
return sub1_from_channel(chptr);
}
static int channel_all_zombies(struct Channel* chptr)
{
struct Membership* member;
for (member = chptr->members; member; member = member->next_member) {
if (!IsZombie(member))
return 0;
}
return 1;
}
void remove_user_from_channel(struct Client* cptr, struct Channel* chptr)
{
struct Membership* member;
assert(0 != chptr);
if ((member = find_member_link(chptr, cptr))) {
if (remove_member_from_channel(member)) {
if (channel_all_zombies(chptr)) {
/*
* XXX - this looks dangerous but isn't if we got the referential
* integrity right for channels
*/
while (remove_member_from_channel(chptr->members))
;
}
}
}
}
void remove_user_from_all_channels(struct Client* cptr)
{
struct Membership* chan;
assert(0 != cptr);
assert(0 != cli_user(cptr));
while ((chan = (cli_user(cptr))->channel))
remove_user_from_channel(cptr, chan->channel);
}
int is_chan_op(struct Client *cptr, struct Channel *chptr)
{
struct Membership* member;
assert(chptr);
if ((member = find_member_link(chptr, cptr)))
return (!IsZombie(member) && IsChanOp(member));
return 0;
}
int is_zombie(struct Client *cptr, struct Channel *chptr)
{
struct Membership* member;
assert(0 != chptr);
if ((member = find_member_link(chptr, cptr)))
return IsZombie(member);
return 0;
}
int has_voice(struct Client* cptr, struct Channel* chptr)
{
struct Membership* member;
assert(0 != chptr);
if ((member = find_member_link(chptr, cptr)))
return (!IsZombie(member) && HasVoice(member));
return 0;
}
int member_can_send_to_channel(struct Membership* member)
{
assert(0 != member);
if (IsVoicedOrOpped(member))
return 1;
/*
* If it's moderated, and you aren't a priviledged user, you can't
* speak.
*/
if (member->channel->mode.mode & MODE_MODERATED)
return 0;
/*
* If you're banned then you can't speak either.
* but because of the amount of CPU time that is_banned chews
* we only check it for our clients.
*/
if (MyUser(member->user) && is_banned(member->user, member->channel, member))
return 0;
return 1;
}
int client_can_send_to_channel(struct Client *cptr, struct Channel *chptr)
{
struct Membership *member;
assert(0 != cptr);
/*
* Servers can always speak on channels.
*/
if (IsServer(cptr))
return 1;
member = find_channel_member(cptr, chptr);
/* You can't speak if your off channel and +n (no external messages) or +m (moderated). */
if (!member) {
if ((chptr->mode.mode & (MODE_NOPRIVMSGS|MODE_MODERATED)) ||
((chptr->mode.mode & MODE_REGONLY) && !IsAccount(cptr)))
return 0;
else
return !is_banned(cptr, chptr, NULL);
}
return member_can_send_to_channel(member);
}
/*
* find_no_nickchange_channel
* if a member and not opped or voiced and banned
* return the name of the first channel banned on
*/
const char* find_no_nickchange_channel(struct Client* cptr)
{
if (MyUser(cptr)) {
struct Membership* member;
for (member = (cli_user(cptr))->channel; member;
member = member->next_channel) {
if (!IsVoicedOrOpped(member) && is_banned(cptr, member->channel, member))
return member->channel->chname;
}
}
return 0;
}
/*
* write the "simple" list of channel modes for channel chptr onto buffer mbuf
* with the parameters in pbuf.
*/
void channel_modes(struct Client *cptr, char *mbuf, char *pbuf, int buflen,
struct Channel *chptr)
{
assert(0 != mbuf);
assert(0 != pbuf);
assert(0 != chptr);
*mbuf++ = '+';
if (chptr->mode.mode & MODE_SECRET)
*mbuf++ = 's';
else if (chptr->mode.mode & MODE_PRIVATE)
*mbuf++ = 'p';
if (chptr->mode.mode & MODE_MODERATED)
*mbuf++ = 'm';
if (chptr->mode.mode & MODE_TOPICLIMIT)
*mbuf++ = 't';
if (chptr->mode.mode & MODE_INVITEONLY)
*mbuf++ = 'i';
if (chptr->mode.mode & MODE_NOPRIVMSGS)
*mbuf++ = 'n';
if (chptr->mode.mode & MODE_REGONLY)
*mbuf++ = 'r';
if (chptr->mode.limit) {
*mbuf++ = 'l';
ircd_snprintf(0, pbuf, buflen, "%u", chptr->mode.limit);
}
if (*chptr->mode.key) {
*mbuf++ = 'k';
if (chptr->mode.limit)
strcat(pbuf, " ");
if (is_chan_op(cptr, chptr) || IsServer(cptr)) {
strcat(pbuf, chptr->mode.key);
} else
strcat(pbuf, "*");
}
*mbuf = '\0';
}
/*
* send "cptr" a full list of the modes for channel chptr.
*/
void send_channel_modes(struct Client *cptr, struct Channel *chptr)
{
static unsigned int current_flags[4] =
{ 0, CHFL_CHANOP | CHFL_VOICE, CHFL_VOICE, CHFL_CHANOP };
int first = 1;
int full = 1;
int flag_cnt = 0;
int new_mode = 0;
size_t len;
struct Membership* member;
struct SLink* lp2;
char modebuf[MODEBUFLEN];
char parabuf[MODEBUFLEN];
struct MsgBuf *mb;
assert(0 != cptr);
assert(0 != chptr);
if (IsLocalChannel(chptr->chname))
return;
member = chptr->members;
lp2 = chptr->banlist;
*modebuf = *parabuf = '\0';
channel_modes(cptr, modebuf, parabuf, sizeof(parabuf), chptr);
for (first = 1; full; first = 0) /* Loop for multiple messages */
{
full = 0; /* Assume by default we get it
all in one message */
/* (Continued) prefix: "<Y> B <channel> <TS>" */
/* is there any better way we can do this? */
mb = msgq_make(&me, "%C " TOK_BURST " %H %Tu", &me, chptr,
chptr->creationtime);
if (first && modebuf[1]) /* Add simple modes (iklmnpst)
if first message */
{
/* prefix: "<Y> B <channel> <TS>[ <modes>[ <params>]]" */
msgq_append(&me, mb, " %s", modebuf);
if (*parabuf)
msgq_append(&me, mb, " %s", parabuf);
}
/*
* Attach nicks, comma seperated " nick[:modes],nick[:modes],..."
*
* Run 4 times over all members, to group the members with the
* same mode together
*/
for (first = 1; flag_cnt < 4;
member = chptr->members, new_mode = 1, flag_cnt++)
{
for (; member; member = member->next_member)
{
if ((member->status & CHFL_VOICED_OR_OPPED) !=
current_flags[flag_cnt])
continue; /* Skip members with different flags */
if (msgq_bufleft(mb) < NUMNICKLEN + 4)
/* The 4 is a possible ",:ov" */
{
full = 1; /* Make sure we continue after
sending it so far */
new_mode = 1; /* Ensure the new BURST line contains the current
mode. --Gte */
break; /* Do not add this member to this message */
}
msgq_append(&me, mb, "%c%C", first ? ' ' : ',', member->user);
first = 0; /* From now on, us comma's to add new nicks */
/*
* Do we have a nick with a new mode ?
* Or are we starting a new BURST line?
*/
if (new_mode)
{
new_mode = 0;
if (IsVoicedOrOpped(member)) {
char tbuf[4] = ":";
int loc = 1;
if (IsChanOp(member))
tbuf[loc++] = 'o';
if (HasVoice(member))
tbuf[loc++] = 'v';
tbuf[loc] = '\0';
msgq_append(&me, mb, tbuf);
}
}
}
if (full)
break;
}
if (!full)
{
/* Attach all bans, space seperated " :%ban ban ..." */
for (first = 2; lp2; lp2 = lp2->next)
{
len = strlen(lp2->value.ban.banstr);
if (msgq_bufleft(mb) < len + 1 + first)
/* The +1 stands for the added ' '.
* The +first stands for the added ":%".
*/
{
full = 1;
break;
}
msgq_append(&me, mb, " %s%s", first ? ":%" : "",
lp2->value.ban.banstr);
first = 0;
}
}
send_buffer(cptr, mb, 0); /* Send this message */
msgq_clean(mb);
} /* Continue when there was something
that didn't fit (full==1) */
}
/*
* pretty_mask
*
* by Carlo Wood (Run), 05 Oct 1998.
*
* Canonify a mask.
*
* When the nick is longer then NICKLEN, it is cut off (its an error of course).
* When the user name or host name are too long (USERLEN and HOSTLEN
* respectively) then they are cut off at the start with a '*'.
*
* The following transformations are made:
*
* 1) xxx -> nick!*@*
* 2) xxx.xxx -> *!*@host
* 3) xxx!yyy -> nick!user@*
* 4) xxx@yyy -> *!user@host
* 5) xxx!yyy@zzz -> nick!user@host
*/
char *pretty_mask(char *mask)
{
static char star[2] = { '*', 0 };
static char retmask[NUH_BUFSIZE];
char *last_dot = NULL;
char *ptr;
/* Case 1: default */
char *nick = mask;
char *user = star;
char *host = star;
/* Do a _single_ pass through the characters of the mask: */
for (ptr = mask; *ptr; ++ptr)
{
if (*ptr == '!')
{
/* Case 3 or 5: Found first '!' (without finding a '@' yet) */
user = ++ptr;
host = star;
}
else if (*ptr == '@')
{
/* Case 4: Found last '@' (without finding a '!' yet) */
nick = star;
user = mask;
host = ++ptr;
}
else if (*ptr == '.')
{
/* Case 2: Found last '.' (without finding a '!' or '@' yet) */
last_dot = ptr;
continue;
}
else
continue;
for (; *ptr; ++ptr)
{
if (*ptr == '@')
{
/* Case 4 or 5: Found last '@' */
host = ptr + 1;
}
}
break;
}
if (user == star && last_dot)
{
/* Case 2: */
nick = star;
user = star;
host = mask;
}
/* Check lengths */
if (nick != star)
{
char *nick_end = (user != star) ? user - 1 : ptr;
if (nick_end - nick > NICKLEN)
nick[NICKLEN] = 0;
*nick_end = 0;
}
if (user != star)
{
char *user_end = (host != star) ? host - 1 : ptr;
if (user_end - user > USERLEN)
{
user = user_end - USERLEN;
*user = '*';
}
*user_end = 0;
}
if (host != star && ptr - host > HOSTLEN)
{
host = ptr - HOSTLEN;
*host = '*';
}
return make_nick_user_host(retmask, nick, user, host);
}
static void send_ban_list(struct Client* cptr, struct Channel* chptr)
{
struct SLink* lp;
assert(0 != cptr);
assert(0 != chptr);
for (lp = chptr->banlist; lp; lp = lp->next)
send_reply(cptr, RPL_BANLIST, chptr->chname, lp->value.ban.banstr,
lp->value.ban.who, lp->value.ban.when);
send_reply(cptr, RPL_ENDOFBANLIST, chptr->chname);
}
/* We are now treating the <key> part of /join <channel list> <key> as a key
* ring; that is, we try one key against the actual channel key, and if that
* doesn't work, we try the next one, and so on. -Kev -Texaco
* Returns: 0 on match, 1 otherwise
* This version contributed by SeKs <intru@info.polymtl.ca>
*/
static int compall(char *key, char *keyring)
{
char *p1;
top:
p1 = key; /* point to the key... */
while (*p1 && *p1 == *keyring)
{ /* step through the key and ring until they
don't match... */
p1++;
keyring++;
}
if (!*p1 && (!*keyring || *keyring == ','))
/* ok, if we're at the end of the and also at the end of one of the keys
in the keyring, we have a match */
return 0;
if (!*keyring) /* if we're at the end of the key ring, there
weren't any matches, so we return 1 */
return 1;
/* Not at the end of the key ring, so step
through to the next key in the ring: */
while (*keyring && *(keyring++) != ',');
goto top; /* and check it against the key */
}
int can_join(struct Client *sptr, struct Channel *chptr, char *key)
{
int overrideJoin = 0;
/*
* Now a banned user CAN join if invited -- Nemesi
* Now a user CAN escape channel limit if invited -- bfriendly
* Now a user CAN escape anything if invited -- Isomer
*/
if(IsInvited(sptr, chptr))
return 0;
/* An oper can force a join on a local channel using "OVERRIDE" as the key.
a HACK(4) notice will be sent if he would not have been supposed
to join normally. */
if (IsLocalChannel(chptr->chname) && HasPriv(sptr, PRIV_WALK_LCHAN) &&
!BadPtr(key) && compall("OVERRIDE",key) == 0
&& compall("OVERRIDE",chptr->mode.key) != 0)
overrideJoin = MAGIC_OPER_OVERRIDE;
if (chptr->mode.mode & MODE_INVITEONLY)
return overrideJoin + ERR_INVITEONLYCHAN;
if (chptr->mode.limit && chptr->users >= chptr->mode.limit)
return overrideJoin + ERR_CHANNELISFULL;
if ((chptr->mode.mode & MODE_REGONLY) && !IsAccount(sptr))
return overrideJoin + ERR_NEEDREGGEDNICK;
if (is_banned(sptr, chptr, NULL))
return overrideJoin + ERR_BANNEDFROMCHAN;
/*
* now using compall (above) to test against a whole key ring -Kev
*/
if (*chptr->mode.key && (EmptyString(key) || compall(chptr->mode.key, key)))
return overrideJoin + ERR_BADCHANNELKEY;
if (overrideJoin)
return ERR_DONTCHEAT;
return 0;
}
/*
* Remove bells and commas from channel name
*/
void clean_channelname(char *cn)
{
int i;
for (i = 0; cn[i]; i++) {
if (i >= CHANNELLEN || !IsChannelChar(cn[i])) {
cn[i] = '\0';
return;
}
if (IsChannelLower(cn[i])) {
cn[i] = ToLower(cn[i]);
#ifndef FIXME
/*
* Remove for .08+
* toupper(0xd0)
*/
if ((unsigned char)(cn[i]) == 0xd0)
cn[i] = (char) 0xf0;
#endif
}
}
}
/*
* Get Channel block for i (and allocate a new channel
* block, if it didn't exists before).
*/
struct Channel *get_channel(struct Client *cptr, char *chname, ChannelGetType flag)
{
struct Channel *chptr;
int len;
if (EmptyString(chname))
return NULL;
len = strlen(chname);
if (MyUser(cptr) && len > CHANNELLEN)
{
len = CHANNELLEN;
*(chname + CHANNELLEN) = '\0';
}
if ((chptr = FindChannel(chname)))
return (chptr);
if (flag == CGT_CREATE)
{
chptr = (struct Channel*) MyMalloc(sizeof(struct Channel) + len);
assert(0 != chptr);
++UserStats.channels;
memset(chptr, 0, sizeof(struct Channel));
strcpy(chptr->chname, chname);
if (GlobalChannelList)
GlobalChannelList->prev = chptr;
chptr->prev = NULL;
chptr->next = GlobalChannelList;
chptr->creationtime = MyUser(cptr) ? TStime() : (time_t) 0;
GlobalChannelList = chptr;
hAddChannel(chptr);
}
return chptr;
}
void add_invite(struct Client *cptr, struct Channel *chptr)
{
struct SLink *inv, **tmp;
del_invite(cptr, chptr);
/*
* Delete last link in chain if the list is max length
*/
assert(list_length((cli_user(cptr))->invited) == (cli_user(cptr))->invites);
if ((cli_user(cptr))->invites >= feature_int(FEAT_MAXCHANNELSPERUSER))
del_invite(cptr, (cli_user(cptr))->invited->value.chptr);
/*
* Add client to channel invite list
*/
inv = make_link();
inv->value.cptr = cptr;
inv->next = chptr->invites;
chptr->invites = inv;
/*
* Add channel to the end of the client invite list
*/
for (tmp = &((cli_user(cptr))->invited); *tmp; tmp = &((*tmp)->next));
inv = make_link();
inv->value.chptr = chptr;
inv->next = NULL;
(*tmp) = inv;
(cli_user(cptr))->invites++;
}
/*
* Delete Invite block from channel invite list and client invite list
*/
void del_invite(struct Client *cptr, struct Channel *chptr)
{
struct SLink **inv, *tmp;
for (inv = &(chptr->invites); (tmp = *inv); inv = &tmp->next)
if (tmp->value.cptr == cptr)
{
*inv = tmp->next;
free_link(tmp);
tmp = 0;
(cli_user(cptr))->invites--;
break;
}
for (inv = &((cli_user(cptr))->invited); (tmp = *inv); inv = &tmp->next)
if (tmp->value.chptr == chptr)
{
*inv = tmp->next;
free_link(tmp);
tmp = 0;
break;
}
}
/* List and skip all channels that are listen */
void list_next_channels(struct Client *cptr, int nr)
{
struct ListingArgs *args = cli_listing(cptr);
struct Channel *chptr = args->chptr;
chptr->mode.mode &= ~MODE_LISTED;
while (is_listed(chptr) || --nr >= 0)
{
for (; chptr; chptr = chptr->next)
{
if (!cli_user(cptr))
continue;
if (chptr->users > args->min_users && chptr->users < args->max_users &&
chptr->creationtime > args->min_time &&
chptr->creationtime < args->max_time &&
(!(args->flags & LISTARG_TOPICLIMITS) || (*chptr->topic &&
chptr->topic_time > args->min_topic_time &&
chptr->topic_time < args->max_topic_time)))
{
if ((args->flags & LISTARG_SHOWSECRET) || ShowChannel(cptr,chptr))
send_reply(cptr, RPL_LIST, chptr->chname, chptr->users,
chptr->topic);
chptr = chptr->next;
break;
}
}
if (!chptr)
{
MyFree(cli_listing(cptr));
cli_listing(cptr) = NULL;
send_reply(cptr, RPL_LISTEND);
break;
}
}
if (chptr)
{
(cli_listing(cptr))->chptr = chptr;
chptr->mode.mode |= MODE_LISTED;
}
update_write(cptr);
}
/*
* Consider:
*
* client
* |
* c
* |
* X --a--> A --b--> B --d--> D
* |
* who
*
* Where `who' is being KICK-ed by a "KICK" message received by server 'A'
* via 'a', or on server 'B' via either 'b' or 'c', or on server D via 'd'.
*
* a) On server A : set CHFL_ZOMBIE for `who' (lp) and pass on the KICK.
* Remove the user immedeately when no users are left on the channel.
* b) On server B : remove the user (who/lp) from the channel, send a
* PART upstream (to A) and pass on the KICK.
* c) KICKed by `client'; On server B : remove the user (who/lp) from the
* channel, and pass on the KICK.
* d) On server D : remove the user (who/lp) from the channel, and pass on
* the KICK.
*
* Note:
* - Setting the ZOMBIE flag never hurts, we either remove the
* client after that or we don't.
* - The KICK message was already passed on, as should be in all cases.
* - `who' is removed in all cases except case a) when users are left.
* - A PART is only sent upstream in case b).
*
* 2 aug 97:
*
* 6
* |
* 1 --- 2 --- 3 --- 4 --- 5
* | |
* kicker who
*
* We also need to turn 'who' into a zombie on servers 1 and 6,
* because a KICK from 'who' (kicking someone else in that direction)
* can arrive there afterwards - which should not be bounced itself.
* Therefore case a) also applies for servers 1 and 6.
*
* --Run
*/
void make_zombie(struct Membership* member, struct Client* who, struct Client* cptr,
struct Client* sptr, struct Channel* chptr)
{
assert(0 != member);
assert(0 != who);
assert(0 != cptr);
assert(0 != chptr);
/* Default for case a): */
SetZombie(member);
/* Case b) or c) ?: */
if (MyUser(who)) /* server 4 */
{
if (IsServer(cptr)) /* Case b) ? */
sendcmdto_one(who, CMD_PART, cptr, "%H", chptr);
remove_user_from_channel(who, chptr);
return;
}
if (cli_from(who) == cptr) /* True on servers 1, 5 and 6 */
{
struct Client *acptr = IsServer(sptr) ? sptr : (cli_user(sptr))->server;
for (; acptr != &me; acptr = (cli_serv(acptr))->up)
if (acptr == (cli_user(who))->server) /* Case d) (server 5) */
{
remove_user_from_channel(who, chptr);
return;
}
}
/* Case a) (servers 1, 2, 3 and 6) */
if (channel_all_zombies(chptr))
remove_user_from_channel(who, chptr);
/* XXX Can't actually call Debug here; if the channel is all zombies,
* chptr will no longer exist when we get here.
Debug((DEBUG_INFO, "%s is now a zombie on %s", who->name, chptr->chname));
*/
}
int number_of_zombies(struct Channel *chptr)
{
struct Membership* member;
int count = 0;
assert(0 != chptr);
for (member = chptr->members; member; member = member->next_member) {
if (IsZombie(member))
++count;
}
return count;
}
/*
* This helper function builds an argument string in strptr, consisting
* of the original string, a space, and str1 and str2 concatenated (if,
* of course, str2 is not NULL)
*/
static void
build_string(char *strptr, int *strptr_i, char *str1, char *str2, char c)
{
if (c)
strptr[(*strptr_i)++] = c;
while (*str1)
strptr[(*strptr_i)++] = *(str1++);
if (str2)
while (*str2)
strptr[(*strptr_i)++] = *(str2++);
strptr[(*strptr_i)] = '\0';
}
/*
* This is the workhorse of our ModeBuf suite; this actually generates the
* output MODE commands, HACK notices, or whatever. It's pretty complicated.
*/
static int
modebuf_flush_int(struct ModeBuf *mbuf, int all)
{
/* we only need the flags that don't take args right now */
static int flags[] = {
/* MODE_CHANOP, 'o', */
/* MODE_VOICE, 'v', */
MODE_PRIVATE, 'p',
MODE_SECRET, 's',
MODE_MODERATED, 'm',
MODE_TOPICLIMIT, 't',
MODE_INVITEONLY, 'i',
MODE_NOPRIVMSGS, 'n',
MODE_REGONLY, 'r',
/* MODE_KEY, 'k', */
/* MODE_BAN, 'b', */
/* MODE_LIMIT, 'l', */
0x0, 0x0
};
int i;
int *flag_p;
struct Client *app_source; /* where the MODE appears to come from */
char addbuf[20]; /* accumulates +psmtin, etc. */
int addbuf_i = 0;
char rembuf[20]; /* accumulates -psmtin, etc. */
int rembuf_i = 0;
char *bufptr; /* we make use of indirection to simplify the code */
int *bufptr_i;
char addstr[BUFSIZE]; /* accumulates MODE parameters to add */
int addstr_i;
char remstr[BUFSIZE]; /* accumulates MODE parameters to remove */
int remstr_i;
char *strptr; /* more indirection to simplify the code */
int *strptr_i;
int totalbuflen = BUFSIZE - 200; /* fuzz factor -- don't overrun buffer! */
int tmp;
char limitbuf[20]; /* convert limits to strings */
unsigned int limitdel = MODE_LIMIT;
assert(0 != mbuf);
/* If the ModeBuf is empty, we have nothing to do */
if (mbuf->mb_add == 0 && mbuf->mb_rem == 0 && mbuf->mb_count == 0)
return 0;
/* Ok, if we were given the OPMODE flag or if it's a server, hide source */
if (mbuf->mb_dest & MODEBUF_DEST_OPMODE || IsServer(mbuf->mb_source))
app_source = &me;
else
app_source = mbuf->mb_source;
/*
* Account for user we're bouncing; we have to get it in on the first
* bounced MODE, or we could have problems
*/
if (mbuf->mb_dest & MODEBUF_DEST_DEOP)
totalbuflen -= 6; /* numeric nick == 5, plus one space */
/* Calculate the simple flags */
for (flag_p = flags; flag_p[0]; flag_p += 2) {
if (*flag_p & mbuf->mb_add)
addbuf[addbuf_i++] = flag_p[1];
else if (*flag_p & mbuf->mb_rem)
rembuf[rembuf_i++] = flag_p[1];
}
/* Now go through the modes with arguments... */
for (i = 0; i < mbuf->mb_count; i++) {
if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
bufptr = addbuf;
bufptr_i = &addbuf_i;
} else {
bufptr = rembuf;
bufptr_i = &rembuf_i;
}
if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE)) {
tmp = strlen(cli_name(MB_CLIENT(mbuf, i)));
if ((totalbuflen - IRCD_MAX(5, tmp)) <= 0) /* don't overflow buffer */
MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
else {
bufptr[(*bufptr_i)++] = MB_TYPE(mbuf, i) & MODE_CHANOP ? 'o' : 'v';
totalbuflen -= IRCD_MAX(5, tmp) + 1;
}
} else if (MB_TYPE(mbuf, i) & MODE_BAN) {
tmp = strlen(MB_STRING(mbuf, i));
if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
else {
bufptr[(*bufptr_i)++] = 'b';
totalbuflen -= tmp + 1;
}
} else if (MB_TYPE(mbuf, i) & MODE_KEY) {
tmp = (mbuf->mb_dest & MODEBUF_DEST_NOKEY ? 1 :
strlen(MB_STRING(mbuf, i)));
if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
else {
bufptr[(*bufptr_i)++] = 'k';
totalbuflen -= tmp + 1;
}
} else if (MB_TYPE(mbuf, i) & MODE_LIMIT) {
/* if it's a limit, we also format the number */
ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
tmp = strlen(limitbuf);
if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
else {
bufptr[(*bufptr_i)++] = 'l';
totalbuflen -= tmp + 1;
}
}
}
/* terminate the mode strings */
addbuf[addbuf_i] = '\0';
rembuf[rembuf_i] = '\0';
/* If we're building a user visible MODE or HACK... */
if (mbuf->mb_dest & (MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK2 |
MODEBUF_DEST_HACK3 | MODEBUF_DEST_HACK4 |
MODEBUF_DEST_LOG)) {
/* Set up the parameter strings */
addstr[0] = '\0';
addstr_i = 0;
remstr[0] = '\0';
remstr_i = 0;
for (i = 0; i < mbuf->mb_count; i++) {
if (MB_TYPE(mbuf, i) & MODE_SAVE)
continue;
if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
strptr = addstr;
strptr_i = &addstr_i;
} else {
strptr = remstr;
strptr_i = &remstr_i;
}
/* deal with clients... */
if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
build_string(strptr, strptr_i, cli_name(MB_CLIENT(mbuf, i)), 0, ' ');
/* deal with bans... */
else if (MB_TYPE(mbuf, i) & MODE_BAN)
build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
/* deal with keys... */
else if (MB_TYPE(mbuf, i) & MODE_KEY)
build_string(strptr, strptr_i, mbuf->mb_dest & MODEBUF_DEST_NOKEY ?
"*" : MB_STRING(mbuf, i), 0, ' ');
/*
* deal with limit; note we cannot include the limit parameter if we're
* removing it
*/
else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_LIMIT)) ==
(MODE_ADD | MODE_LIMIT))
build_string(strptr, strptr_i, limitbuf, 0, ' ');
}
/* send the messages off to their destination */
if (mbuf->mb_dest & MODEBUF_DEST_HACK2)
sendto_opmask_butone(0, SNO_HACK2, "HACK(2): %s MODE %s %s%s%s%s%s%s "
"[%Tu]",
cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
mbuf->mb_source : app_source),
mbuf->mb_channel->chname,
rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
addbuf, remstr, addstr,
mbuf->mb_channel->creationtime);
if (mbuf->mb_dest & MODEBUF_DEST_HACK3)
sendto_opmask_butone(0, SNO_HACK3, "BOUNCE or HACK(3): %s MODE %s "
"%s%s%s%s%s%s [%Tu]",
cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
mbuf->mb_source : app_source),
mbuf->mb_channel->chname, rembuf_i ? "-" : "",
rembuf, addbuf_i ? "+" : "", addbuf, remstr, addstr,
mbuf->mb_channel->creationtime);
if (mbuf->mb_dest & MODEBUF_DEST_HACK4)
sendto_opmask_butone(0, SNO_HACK4, "HACK(4): %s MODE %s %s%s%s%s%s%s "
"[%Tu]",
cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
mbuf->mb_source : app_source),
mbuf->mb_channel->chname,
rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
addbuf, remstr, addstr,
mbuf->mb_channel->creationtime);
if (mbuf->mb_dest & MODEBUF_DEST_LOG)
log_write(LS_OPERMODE, L_INFO, LOG_NOSNOTICE,
"%#C OPMODE %H %s%s%s%s%s%s", mbuf->mb_source,
mbuf->mb_channel, rembuf_i ? "-" : "", rembuf,
addbuf_i ? "+" : "", addbuf, remstr, addstr);
if (mbuf->mb_dest & MODEBUF_DEST_CHANNEL)
sendcmdto_channel_butserv_butone(app_source, CMD_MODE, mbuf->mb_channel, NULL,
"%H %s%s%s%s%s%s", mbuf->mb_channel,
rembuf_i ? "-" : "", rembuf,
addbuf_i ? "+" : "", addbuf, remstr, addstr);
}
/* Now are we supposed to propagate to other servers? */
if (mbuf->mb_dest & MODEBUF_DEST_SERVER) {
/* set up parameter string */
addstr[0] = '\0';
addstr_i = 0;
remstr[0] = '\0';
remstr_i = 0;
/*
* limit is supressed if we're removing it; we have to figure out which
* direction is the direction for it to be removed, though...
*/
limitdel |= (mbuf->mb_dest & MODEBUF_DEST_HACK2) ? MODE_DEL : MODE_ADD;
for (i = 0; i < mbuf->mb_count; i++) {
if (MB_TYPE(mbuf, i) & MODE_SAVE)
continue;
if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
strptr = addstr;
strptr_i = &addstr_i;
} else {
strptr = remstr;
strptr_i = &remstr_i;
}
/* deal with modes that take clients */
if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
build_string(strptr, strptr_i, NumNick(MB_CLIENT(mbuf, i)), ' ');
/* deal with modes that take strings */
else if (MB_TYPE(mbuf, i) & (MODE_KEY | MODE_BAN))
build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
/*
* deal with the limit. Logic here is complicated; if HACK2 is set,
* we're bouncing the mode, so sense is reversed, and we have to
* include the original limit if it looks like it's being removed
*/
else if ((MB_TYPE(mbuf, i) & limitdel) == limitdel)
build_string(strptr, strptr_i, limitbuf, 0, ' ');
}
/* we were told to deop the source */
if (mbuf->mb_dest & MODEBUF_DEST_DEOP) {
addbuf[addbuf_i++] = 'o'; /* remember, sense is reversed */
addbuf[addbuf_i] = '\0'; /* terminate the string... */
build_string(addstr, &addstr_i, NumNick(mbuf->mb_source), ' ');
/* mark that we've done this, so we don't do it again */
mbuf->mb_dest &= ~MODEBUF_DEST_DEOP;
}
if (mbuf->mb_dest & MODEBUF_DEST_OPMODE) {
/* If OPMODE was set, we're propagating the mode as an OPMODE message */
sendcmdto_serv_butone(mbuf->mb_source, CMD_OPMODE, mbuf->mb_connect,
"%H %s%s%s%s%s%s", mbuf->mb_channel,
rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
addbuf, remstr, addstr);
} else if (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) {
/*
* If HACK2 was set, we're bouncing; we send the MODE back to the
* connection we got it from with the senses reversed and a TS of 0;
* origin is us
*/
sendcmdto_one(&me, CMD_MODE, mbuf->mb_connect, "%H %s%s%s%s%s%s %Tu",
mbuf->mb_channel, addbuf_i ? "-" : "", addbuf,
rembuf_i ? "+" : "", rembuf, addstr, remstr,
mbuf->mb_channel->creationtime);
} else {
/*
* We're propagating a normal MODE command to the rest of the network;
* we send the actual channel TS unless this is a HACK3 or a HACK4
*/
if (IsServer(mbuf->mb_source))
sendcmdto_serv_butone(mbuf->mb_source, CMD_MODE, mbuf->mb_connect,
"%H %s%s%s%s%s%s %Tu", mbuf->mb_channel,
rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
addbuf, remstr, addstr,
(mbuf->mb_dest & MODEBUF_DEST_HACK4) ? 0 :
mbuf->mb_channel->creationtime);
else
sendcmdto_serv_butone(mbuf->mb_source, CMD_MODE, mbuf->mb_connect,
"%H %s%s%s%s%s%s", mbuf->mb_channel,
rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
addbuf, remstr, addstr);
}
}
/* We've drained the ModeBuf... */
mbuf->mb_add = 0;
mbuf->mb_rem = 0;
mbuf->mb_count = 0;
/* reinitialize the mode-with-arg slots */
for (i = 0; i < MAXMODEPARAMS; i++) {
/* If we saved any, pack them down */
if (MB_TYPE(mbuf, i) & MODE_SAVE) {
mbuf->mb_modeargs[mbuf->mb_count] = mbuf->mb_modeargs[i];
MB_TYPE(mbuf, mbuf->mb_count) &= ~MODE_SAVE; /* don't save anymore */
if (mbuf->mb_count++ == i) /* don't overwrite our hard work */
continue;
} else if (MB_TYPE(mbuf, i) & MODE_FREE)
MyFree(MB_STRING(mbuf, i)); /* free string if needed */
MB_TYPE(mbuf, i) = 0;
MB_UINT(mbuf, i) = 0;
}
/* If we're supposed to flush it all, do so--all hail tail recursion */
if (all && mbuf->mb_count)
return modebuf_flush_int(mbuf, 1);
return 0;
}
/*
* This routine just initializes a ModeBuf structure with the information
* needed and the options given.
*/
void
modebuf_init(struct ModeBuf *mbuf, struct Client *source,
struct Client *connect, struct Channel *chan, unsigned int dest)
{
int i;
assert(0 != mbuf);
assert(0 != source);
assert(0 != chan);
assert(0 != dest);
if (IsLocalChannel(chan->chname)) dest &= ~MODEBUF_DEST_SERVER;
mbuf->mb_add = 0;
mbuf->mb_rem = 0;
mbuf->mb_source = source;
mbuf->mb_connect = connect;
mbuf->mb_channel = chan;
mbuf->mb_dest = dest;
mbuf->mb_count = 0;
/* clear each mode-with-parameter slot */
for (i = 0; i < MAXMODEPARAMS; i++) {
MB_TYPE(mbuf, i) = 0;
MB_UINT(mbuf, i) = 0;
}
}
/*
* This routine simply adds modes to be added or deleted; do a binary OR
* with either MODE_ADD or MODE_DEL
*/
void
modebuf_mode(struct ModeBuf *mbuf, unsigned int mode)
{
assert(0 != mbuf);
assert(0 != (mode & (MODE_ADD | MODE_DEL)));
mode &= (MODE_ADD | MODE_DEL | MODE_PRIVATE | MODE_SECRET | MODE_MODERATED |
MODE_TOPICLIMIT | MODE_INVITEONLY | MODE_NOPRIVMSGS | MODE_REGONLY);
if (!(mode & ~(MODE_ADD | MODE_DEL))) /* don't add empty modes... */
return;
if (mode & MODE_ADD) {
mbuf->mb_rem &= ~mode;
mbuf->mb_add |= mode;
} else {
mbuf->mb_add &= ~mode;
mbuf->mb_rem |= mode;
}
}
/*
* This routine adds a mode to be added or deleted that takes a unsigned
* int parameter; mode may *only* be the relevant mode flag ORed with one
* of MODE_ADD or MODE_DEL
*/
void
modebuf_mode_uint(struct ModeBuf *mbuf, unsigned int mode, unsigned int uint)
{
assert(0 != mbuf);
assert(0 != (mode & (MODE_ADD | MODE_DEL)));
MB_TYPE(mbuf, mbuf->mb_count) = mode;
MB_UINT(mbuf, mbuf->mb_count) = uint;
/* when we've reached the maximal count, flush the buffer */
if (++mbuf->mb_count >=
(MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
modebuf_flush_int(mbuf, 0);
}
/*
* This routine adds a mode to be added or deleted that takes a string
* parameter; mode may *only* be the relevant mode flag ORed with one of
* MODE_ADD or MODE_DEL
*/
void
modebuf_mode_string(struct ModeBuf *mbuf, unsigned int mode, char *string,
int free)
{
assert(0 != mbuf);
assert(0 != (mode & (MODE_ADD | MODE_DEL)));
MB_TYPE(mbuf, mbuf->mb_count) = mode | (free ? MODE_FREE : 0);
MB_STRING(mbuf, mbuf->mb_count) = string;
/* when we've reached the maximal count, flush the buffer */
if (++mbuf->mb_count >=
(MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
modebuf_flush_int(mbuf, 0);
}
/*
* This routine adds a mode to be added or deleted that takes a client
* parameter; mode may *only* be the relevant mode flag ORed with one of
* MODE_ADD or MODE_DEL
*/
void
modebuf_mode_client(struct ModeBuf *mbuf, unsigned int mode,
struct Client *client)
{
assert(0 != mbuf);
assert(0 != (mode & (MODE_ADD | MODE_DEL)));
MB_TYPE(mbuf, mbuf->mb_count) = mode;
MB_CLIENT(mbuf, mbuf->mb_count) = client;
/* when we've reached the maximal count, flush the buffer */
if (++mbuf->mb_count >=
(MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
modebuf_flush_int(mbuf, 0);
}
/*
* This is the exported binding for modebuf_flush()
*/
int
modebuf_flush(struct ModeBuf *mbuf)
{
return modebuf_flush_int(mbuf, 1);
}
/*
* This extracts the simple modes contained in mbuf
*/
void
modebuf_extract(struct ModeBuf *mbuf, char *buf)
{
static int flags[] = {
/* MODE_CHANOP, 'o', */
/* MODE_VOICE, 'v', */
MODE_PRIVATE, 'p',
MODE_SECRET, 's',
MODE_MODERATED, 'm',
MODE_TOPICLIMIT, 't',
MODE_INVITEONLY, 'i',
MODE_NOPRIVMSGS, 'n',
MODE_KEY, 'k',
/* MODE_BAN, 'b', */
MODE_LIMIT, 'l',
MODE_REGONLY, 'r',
0x0, 0x0
};
unsigned int add;
int i, bufpos = 0, len;
int *flag_p;
char *key = 0, limitbuf[20];
assert(0 != mbuf);
assert(0 != buf);
buf[0] = '\0';
add = mbuf->mb_add;
for (i = 0; i < mbuf->mb_count; i++) { /* find keys and limits */
if (MB_TYPE(mbuf, i) & MODE_ADD) {
add |= MB_TYPE(mbuf, i) & (MODE_KEY | MODE_LIMIT);
if (MB_TYPE(mbuf, i) & MODE_KEY) /* keep strings */
key = MB_STRING(mbuf, i);
else if (MB_TYPE(mbuf, i) & MODE_LIMIT)
ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
}
}
if (!add)
return;
buf[bufpos++] = '+'; /* start building buffer */
for (flag_p = flags; flag_p[0]; flag_p += 2)
if (*flag_p & add)
buf[bufpos++] = flag_p[1];
for (i = 0, len = bufpos; i < len; i++) {
if (buf[i] == 'k')
build_string(buf, &bufpos, key, 0, ' ');
else if (buf[i] == 'l')
build_string(buf, &bufpos, limitbuf, 0, ' ');
}
buf[bufpos] = '\0';
return;
}
/*
* Simple function to invalidate bans
*/
void
mode_ban_invalidate(struct Channel *chan)
{
struct Membership *member;
for (member = chan->members; member; member = member->next_member)
ClearBanValid(member);
}
/*
* Simple function to drop invite structures
*/
void
mode_invite_clear(struct Channel *chan)
{
while (chan->invites)
del_invite(chan->invites->value.cptr, chan);
}
/* What we've done for mode_parse so far... */
#define DONE_LIMIT 0x01 /* We've set the limit */
#define DONE_KEY 0x02 /* We've set the key */
#define DONE_BANLIST 0x04 /* We've sent the ban list */
#define DONE_NOTOPER 0x08 /* We've sent a "Not oper" error */
#define DONE_BANCLEAN 0x10 /* We've cleaned bans... */
struct ParseState {
struct ModeBuf *mbuf;
struct Client *cptr;
struct Client *sptr;
struct Channel *chptr;
int parc;
char **parv;
unsigned int flags;
unsigned int dir;
unsigned int done;
unsigned int add;
unsigned int del;
int args_used;
int max_args;
int numbans;
struct SLink banlist[MAXPARA];
struct {
unsigned int flag;
struct Client *client;
} cli_change[MAXPARA];
};
/*
* Here's a helper function to deal with sending along "Not oper" or
* "Not member" messages
*/
static void
send_notoper(struct ParseState *state)
{
if (state->done & DONE_NOTOPER)
return;
send_reply(state->sptr, (state->flags & MODE_PARSE_NOTOPER) ?
ERR_CHANOPRIVSNEEDED : ERR_NOTONCHANNEL, state->chptr->chname);
state->done |= DONE_NOTOPER;
}
/*
* Helper function to convert limits
*/
static void
mode_parse_limit(struct ParseState *state, int *flag_p)
{
unsigned int t_limit;
if (state->dir == MODE_ADD) { /* convert arg only if adding limit */
if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
return;
if (state->parc <= 0) { /* warn if not enough args */
if (MyUser(state->sptr))
need_more_params(state->sptr, "MODE +l");
return;
}
t_limit = strtoul(state->parv[state->args_used++], 0, 10); /* grab arg */
state->parc--;
state->max_args--;
if ((int)t_limit<0) /* don't permit a negative limit */
return;
if (!(state->flags & MODE_PARSE_WIPEOUT) &&
(!t_limit || t_limit == state->chptr->mode.limit))
return;
} else
t_limit = state->chptr->mode.limit;
/* If they're not an oper, they can't change modes */
if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
send_notoper(state);
return;
}
/* Can't remove a limit that's not there */
if (state->dir == MODE_DEL && !state->chptr->mode.limit)
return;
/* Skip if this is a burst and a lower limit than this is set already */
if ((state->flags & MODE_PARSE_BURST) &&
(state->chptr->mode.mode & flag_p[0]) &&
(state->chptr->mode.limit < t_limit))
return;
if (state->done & DONE_LIMIT) /* allow limit to be set only once */
return;
state->done |= DONE_LIMIT;
if (!state->mbuf)
return;
modebuf_mode_uint(state->mbuf, state->dir | flag_p[0], t_limit);
if (state->flags & MODE_PARSE_SET) { /* set the limit */
if (state->dir & MODE_ADD) {
state->chptr->mode.mode |= flag_p[0];
state->chptr->mode.limit = t_limit;
} else {
state->chptr->mode.mode &= ~flag_p[0];
state->chptr->mode.limit = 0;
}
}
}
/*
* Helper function to convert keys
*/
static void
mode_parse_key(struct ParseState *state, int *flag_p)
{
char *t_str, *s;
int t_len;
if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
return;
if (state->parc <= 0) { /* warn if not enough args */
if (MyUser(state->sptr))
need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +k" :
"MODE -k");
return;
}
t_str = state->parv[state->args_used++]; /* grab arg */
state->parc--;
state->max_args--;
/* If they're not an oper, they can't change modes */
if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
send_notoper(state);
return;
}
if (state->done & DONE_KEY) /* allow key to be set only once */
return;
state->done |= DONE_KEY;
t_len = KEYLEN;
/* clean up the key string */
s = t_str;
while (*s > ' ' && *s != ':' && t_len--)
s++;
*s = '\0';
if (!*t_str) { /* warn if empty */
if (MyUser(state->sptr))
need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +k" :
"MODE -k");
return;
}
if (!state->mbuf)
return;
/* Skip if this is a burst, we have a key already and the new key is
* after the old one alphabetically */
if ((state->flags & MODE_PARSE_BURST) &&
*(state->chptr->mode.key) &&
ircd_strcmp(state->chptr->mode.key, t_str) <= 0)
return;
/* can't add a key if one is set, nor can one remove the wrong key */
if (!(state->flags & MODE_PARSE_FORCE))
if ((state->dir == MODE_ADD && *state->chptr->mode.key) ||
(state->dir == MODE_DEL &&
ircd_strcmp(state->chptr->mode.key, t_str))) {
send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
return;
}
if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
!ircd_strcmp(state->chptr->mode.key, t_str))
return; /* no key change */
if (state->flags & MODE_PARSE_BOUNCE) {
if (*state->chptr->mode.key) /* reset old key */
modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
state->chptr->mode.key, 0);
else /* remove new bogus key */
modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
} else /* send new key */
modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
if (state->flags & MODE_PARSE_SET) {
if (state->dir == MODE_ADD) /* set the new key */
ircd_strncpy(state->chptr->mode.key, t_str, KEYLEN);
else /* remove the old key */
*state->chptr->mode.key = '\0';
}
}
/*
* Helper function to convert bans
*/
static void
mode_parse_ban(struct ParseState *state, int *flag_p)
{
char *t_str, *s;
struct SLink *ban, *newban = 0;
if (state->parc <= 0) { /* Not enough args, send ban list */
if (MyUser(state->sptr) && !(state->done & DONE_BANLIST)) {
send_ban_list(state->sptr, state->chptr);
state->done |= DONE_BANLIST;
}
return;
}
if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
return;
t_str = state->parv[state->args_used++]; /* grab arg */
state->parc--;
state->max_args--;
/* If they're not an oper, they can't change modes */
if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
send_notoper(state);
return;
}
if ((s = strchr(t_str, ' ')))
*s = '\0';
if (!*t_str || *t_str == ':') { /* warn if empty */
if (MyUser(state->sptr))
need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +b" :
"MODE -b");
return;
}
t_str = collapse(pretty_mask(t_str));
/* remember the ban for the moment... */
if (state->dir == MODE_ADD) {
newban = state->banlist + (state->numbans++);
newban->next = 0;
DupString(newban->value.ban.banstr, t_str);
newban->value.ban.who = cli_name(state->sptr);
newban->value.ban.when = TStime();
newban->flags = CHFL_BAN | MODE_ADD;
if ((s = strrchr(t_str, '@')) && check_if_ipmask(s + 1))
newban->flags |= CHFL_BAN_IPMASK;
}
if (!state->chptr->banlist) {
state->chptr->banlist = newban; /* add our ban with its flags */
state->done |= DONE_BANCLEAN;
return;
}
/* Go through all bans */
for (ban = state->chptr->banlist; ban; ban = ban->next) {
/* first, clean the ban flags up a bit */
if (!(state->done & DONE_BANCLEAN))
/* Note: We're overloading *lots* of bits here; be careful! */
ban->flags &= ~(MODE_ADD | MODE_DEL | CHFL_BAN_OVERLAPPED);
/* Bit meanings:
*
* MODE_ADD - Ban was added; if we're bouncing modes,
* then we'll remove it below; otherwise,
* we'll have to allocate a real ban
*
* MODE_DEL - Ban was marked for deletion; if we're
* bouncing modes, we'll have to re-add it,
* otherwise, we'll have to remove it
*
* CHFL_BAN_OVERLAPPED - The ban we added turns out to overlap
* with a ban already set; if we're
* bouncing modes, we'll have to bounce
* this one; otherwise, we'll just ignore
* it when we process added bans
*/
if (state->dir == MODE_DEL && !ircd_strcmp(ban->value.ban.banstr, t_str)) {
ban->flags |= MODE_DEL; /* delete one ban */
if (state->done & DONE_BANCLEAN) /* If we're cleaning, finish */
break;
} else if (state->dir == MODE_ADD) {
/* if the ban already exists, don't worry about it */
if (!ircd_strcmp(ban->value.ban.banstr, t_str)) {
newban->flags &= ~MODE_ADD; /* don't add ban at all */
MyFree(newban->value.ban.banstr); /* stopper a leak */
state->numbans--; /* deallocate last ban */
if (state->done & DONE_BANCLEAN) /* If we're cleaning, finish */
break;
} else if (!mmatch(ban->value.ban.banstr, t_str)) {
if (!(ban->flags & MODE_DEL))
newban->flags |= CHFL_BAN_OVERLAPPED; /* our ban overlaps */
} else if (!mmatch(t_str, ban->value.ban.banstr))
ban->flags |= MODE_DEL; /* mark ban for deletion: overlapping */
if (!ban->next && (newban->flags & MODE_ADD)) {
ban->next = newban; /* add our ban with its flags */
break; /* get out of loop */
}
}
}
state->done |= DONE_BANCLEAN;
}
/*
* This is the bottom half of the ban processor
*/
static void
mode_process_bans(struct ParseState *state)
{
struct SLink *ban, *newban, *prevban, *nextban;
int count = 0;
int len = 0;
int banlen;
int changed = 0;
for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) {
count++;
banlen = strlen(ban->value.ban.banstr);
len += banlen;
nextban = ban->next;
if ((ban->flags & (MODE_DEL | MODE_ADD)) == (MODE_DEL | MODE_ADD)) {
if (prevban)
prevban->next = 0; /* Break the list; ban isn't a real ban */
else
state->chptr->banlist = 0;
count--;
len -= banlen;
MyFree(ban->value.ban.banstr);
continue;
} else if (ban->flags & MODE_DEL) { /* Deleted a ban? */
modebuf_mode_string(state->mbuf, MODE_DEL | MODE_BAN,
ban->value.ban.banstr,
state->flags & MODE_PARSE_SET);
if (state->flags & MODE_PARSE_SET) { /* Ok, make it take effect */
if (prevban) /* clip it out of the list... */
prevban->next = ban->next;
else
state->chptr->banlist = ban->next;
count--;
len -= banlen;
MyFree(ban->value.ban.who);
free_link(ban);
changed++;
continue; /* next ban; keep prevban like it is */
} else
ban->flags &= (CHFL_BAN | CHFL_BAN_IPMASK); /* unset other flags */
} else if (ban->flags & MODE_ADD) { /* adding a ban? */
if (prevban)
prevban->next = 0; /* Break the list; ban isn't a real ban */
else
state->chptr->banlist = 0;
/* If we're supposed to ignore it, do so. */
if (ban->flags & CHFL_BAN_OVERLAPPED &&
!(state->flags & MODE_PARSE_BOUNCE)) {
count--;
len -= banlen;
MyFree(ban->value.ban.banstr);
} else {
if (state->flags & MODE_PARSE_SET && MyUser(state->sptr) &&
(len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXBANS)) ||
count > feature_int(FEAT_MAXBANS))) {
send_reply(state->sptr, ERR_BANLISTFULL, state->chptr->chname,
ban->value.ban.banstr);
count--;
len -= banlen;
MyFree(ban->value.ban.banstr);
} else {
/* add the ban to the buffer */
modebuf_mode_string(state->mbuf, MODE_ADD | MODE_BAN,
ban->value.ban.banstr,
!(state->flags & MODE_PARSE_SET));
if (state->flags & MODE_PARSE_SET) { /* create a new ban */
newban = make_link();
newban->value.ban.banstr = ban->value.ban.banstr;
DupString(newban->value.ban.who, ban->value.ban.who);
newban->value.ban.when = ban->value.ban.when;
newban->flags = ban->flags & (CHFL_BAN | CHFL_BAN_IPMASK);
newban->next = state->chptr->banlist; /* and link it in */
state->chptr->banlist = newban;
changed++;
}
}
}
}
prevban = ban;
} /* for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) { */
if (changed) /* if we changed the ban list, we must invalidate the bans */
mode_ban_invalidate(state->chptr);
}
/*
* Helper function to process client changes
*/
static void
mode_parse_client(struct ParseState *state, int *flag_p)
{
char *t_str;
struct Client *acptr;
int i;
if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
return;
if (state->parc <= 0) /* return if not enough args */
return;
t_str = state->parv[state->args_used++]; /* grab arg */
state->parc--;
state->max_args--;
/* If they're not an oper, they can't change modes */
if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
send_notoper(state);
return;
}
if (MyUser(state->sptr)) /* find client we're manipulating */
acptr = find_chasing(state->sptr, t_str, NULL);
else
acptr = findNUser(t_str);
if (!acptr)
return; /* find_chasing() already reported an error to the user */
for (i = 0; i < MAXPARA; i++) /* find an element to stick them in */
if (!state->cli_change[i].flag || (state->cli_change[i].client == acptr &&
state->cli_change[i].flag & flag_p[0]))
break; /* found a slot */
/* Store what we're doing to them */
state->cli_change[i].flag = state->dir | flag_p[0];
state->cli_change[i].client = acptr;
}
/*
* Helper function to process the changed client list
*/
static void
mode_process_clients(struct ParseState *state)
{
int i;
struct Membership *member;
for (i = 0; state->cli_change[i].flag; i++) {
assert(0 != state->cli_change[i].client);
/* look up member link */
if (!(member = find_member_link(state->chptr,
state->cli_change[i].client)) ||
(MyUser(state->sptr) && IsZombie(member))) {
if (MyUser(state->sptr))
send_reply(state->sptr, ERR_USERNOTINCHANNEL,
cli_name(state->cli_change[i].client),
state->chptr->chname);
continue;
}
if ((state->cli_change[i].flag & MODE_ADD &&
(state->cli_change[i].flag & member->status)) ||
(state->cli_change[i].flag & MODE_DEL &&
!(state->cli_change[i].flag & member->status)))
continue; /* no change made, don't do anything */
/* see if the deop is allowed */
if ((state->cli_change[i].flag & (MODE_DEL | MODE_CHANOP)) ==
(MODE_DEL | MODE_CHANOP)) {
/* prevent +k users from being deopped */
if (IsChannelService(state->cli_change[i].client)) {
if (state->flags & MODE_PARSE_FORCE) /* it was forced */
sendto_opmask_butone(0, SNO_HACK4, "Deop of +k user on %H by %s",
state->chptr,
(IsServer(state->sptr) ? cli_name(state->sptr) :
cli_name((cli_user(state->sptr))->server)));
else if (MyUser(state->sptr) && state->flags & MODE_PARSE_SET) {
send_reply(state->sptr, ERR_ISCHANSERVICE,
cli_name(state->cli_change[i].client),
state->chptr->chname);
continue;
}
}
/* don't allow local opers to be deopped on local channels */
if (MyUser(state->sptr) && state->cli_change[i].client != state->sptr &&
IsLocalChannel(state->chptr->chname) &&
HasPriv(state->cli_change[i].client, PRIV_DEOP_LCHAN)) {
send_reply(state->sptr, ERR_ISOPERLCHAN,
cli_name(state->cli_change[i].client),
state->chptr->chname);
continue;
}
}
/* accumulate the change */
modebuf_mode_client(state->mbuf, state->cli_change[i].flag,
state->cli_change[i].client);
/* actually effect the change */
if (state->flags & MODE_PARSE_SET) {
if (state->cli_change[i].flag & MODE_ADD) {
member->status |= (state->cli_change[i].flag &
(MODE_CHANOP | MODE_VOICE));
if (state->cli_change[i].flag & MODE_CHANOP)
ClearDeopped(member);
} else
member->status &= ~(state->cli_change[i].flag &
(MODE_CHANOP | MODE_VOICE));
}
} /* for (i = 0; state->cli_change[i].flags; i++) { */
}
/*
* Helper function to process the simple modes
*/
static void
mode_parse_mode(struct ParseState *state, int *flag_p)
{
/* If they're not an oper, they can't change modes */
if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
send_notoper(state);
return;
}
if (!state->mbuf)
return;
if (state->dir == MODE_ADD) {
state->add |= flag_p[0];
state->del &= ~flag_p[0];
if (flag_p[0] & MODE_SECRET) {
state->add &= ~MODE_PRIVATE;
state->del |= MODE_PRIVATE;
} else if (flag_p[0] & MODE_PRIVATE) {
state->add &= ~MODE_SECRET;
state->del |= MODE_SECRET;
}
} else {
state->add &= ~flag_p[0];
state->del |= flag_p[0];
}
assert(0 == (state->add & state->del));
assert((MODE_SECRET | MODE_PRIVATE) !=
(state->add & (MODE_SECRET | MODE_PRIVATE)));
}
/*
* This routine is intended to parse MODE or OPMODE commands and effect the
* changes (or just build the bounce buffer). We pass the starting offset
* as a
*/
int
mode_parse(struct ModeBuf *mbuf, struct Client *cptr, struct Client *sptr,
struct Channel *chptr, int parc, char *parv[], unsigned int flags)
{
static int chan_flags[] = {
MODE_CHANOP, 'o',
MODE_VOICE, 'v',
MODE_PRIVATE, 'p',
MODE_SECRET, 's',
MODE_MODERATED, 'm',
MODE_TOPICLIMIT, 't',
MODE_INVITEONLY, 'i',
MODE_NOPRIVMSGS, 'n',
MODE_KEY, 'k',
MODE_BAN, 'b',
MODE_LIMIT, 'l',
MODE_REGONLY, 'r',
MODE_ADD, '+',
MODE_DEL, '-',
0x0, 0x0
};
int i;
int *flag_p;
unsigned int t_mode;
char *modestr;
struct ParseState state;
assert(0 != cptr);
assert(0 != sptr);
assert(0 != chptr);
assert(0 != parc);
assert(0 != parv);
state.mbuf = mbuf;
state.cptr = cptr;
state.sptr = sptr;
state.chptr = chptr;
state.parc = parc;
state.parv = parv;
state.flags = flags;
state.dir = MODE_ADD;
state.done = 0;
state.add = 0;
state.del = 0;
state.args_used = 0;
state.max_args = MAXMODEPARAMS;
state.numbans = 0;
for (i = 0; i < MAXPARA; i++) { /* initialize ops/voices arrays */
state.banlist[i].next = 0;
state.banlist[i].value.ban.banstr = 0;
state.banlist[i].value.ban.who = 0;
state.banlist[i].value.ban.when = 0;
state.banlist[i].flags = 0;
state.cli_change[i].flag = 0;
state.cli_change[i].client = 0;
}
modestr = state.parv[state.args_used++];
state.parc--;
while (*modestr) {
for (; *modestr; modestr++) {
for (flag_p = chan_flags; flag_p[0]; flag_p += 2) /* look up flag */
if (flag_p[1] == *modestr)
break;
if (!flag_p[0]) { /* didn't find it? complain and continue */
if (MyUser(state.sptr))
send_reply(state.sptr, ERR_UNKNOWNMODE, *modestr);
continue;
}
switch (*modestr) {
case '+': /* switch direction to MODE_ADD */
case '-': /* switch direction to MODE_DEL */
state.dir = flag_p[0];
break;
case 'l': /* deal with limits */
mode_parse_limit(&state, flag_p);
break;
case 'k': /* deal with keys */
mode_parse_key(&state, flag_p);
break;
case 'b': /* deal with bans */
mode_parse_ban(&state, flag_p);
break;
case 'o': /* deal with ops/voice */
case 'v':
mode_parse_client(&state, flag_p);
break;
default: /* deal with other modes */
mode_parse_mode(&state, flag_p);
break;
} /* switch (*modestr) { */
} /* for (; *modestr; modestr++) { */
if (state.flags & MODE_PARSE_BURST)
break; /* don't interpret any more arguments */
if (state.parc > 0) { /* process next argument in string */
modestr = state.parv[state.args_used++];
state.parc--;
/* is it a TS? */
if (IsServer(state.sptr) && !state.parc && IsDigit(*modestr)) {
time_t recv_ts;
if (!(state.flags & MODE_PARSE_SET)) /* don't set earlier TS if */
break; /* we're then going to bounce the mode! */
recv_ts = atoi(modestr);
if (recv_ts && recv_ts < state.chptr->creationtime)
state.chptr->creationtime = recv_ts; /* respect earlier TS */
break; /* break out of while loop */
} else if (state.flags & MODE_PARSE_STRICT ||
(MyUser(state.sptr) && state.max_args <= 0)) {
state.parc++; /* we didn't actually gobble the argument */
state.args_used--;
break; /* break out of while loop */
}
}
} /* while (*modestr) { */
/*
* the rest of the function finishes building resultant MODEs; if the
* origin isn't a member or an oper, skip it.
*/
if (!state.mbuf || state.flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER))
return state.args_used; /* tell our parent how many args we gobbled */
t_mode = state.chptr->mode.mode;
if (state.del & t_mode) { /* delete any modes to be deleted... */
modebuf_mode(state.mbuf, MODE_DEL | (state.del & t_mode));
t_mode &= ~state.del;
}
if (state.add & ~t_mode) { /* add any modes to be added... */
modebuf_mode(state.mbuf, MODE_ADD | (state.add & ~t_mode));
t_mode |= state.add;
}
if (state.flags & MODE_PARSE_SET) { /* set the channel modes */
if ((state.chptr->mode.mode & MODE_INVITEONLY) &&
!(t_mode & MODE_INVITEONLY))
mode_invite_clear(state.chptr);
state.chptr->mode.mode = t_mode;
}
if (state.flags & MODE_PARSE_WIPEOUT) {
if (state.chptr->mode.limit && !(state.done & DONE_LIMIT))
modebuf_mode_uint(state.mbuf, MODE_DEL | MODE_LIMIT,
state.chptr->mode.limit);
if (*state.chptr->mode.key && !(state.done & DONE_KEY))
modebuf_mode_string(state.mbuf, MODE_DEL | MODE_KEY,
state.chptr->mode.key, 0);
}
if (state.done & DONE_BANCLEAN) /* process bans */
mode_process_bans(&state);
/* process client changes */
if (state.cli_change[0].flag)
mode_process_clients(&state);
return state.args_used; /* tell our parent how many args we gobbled */
}
/*
* Initialize a join buffer
*/
void
joinbuf_init(struct JoinBuf *jbuf, struct Client *source,
struct Client *connect, unsigned int type, char *comment,
time_t create)
{
int i;
assert(0 != jbuf);
assert(0 != source);
assert(0 != connect);
jbuf->jb_source = source; /* just initialize struct JoinBuf */
jbuf->jb_connect = connect;
jbuf->jb_type = type;
jbuf->jb_comment = comment;
jbuf->jb_create = create;
jbuf->jb_count = 0;
jbuf->jb_strlen = (((type == JOINBUF_TYPE_JOIN ||
type == JOINBUF_TYPE_PART ||
type == JOINBUF_TYPE_PARTALL) ?
STARTJOINLEN : STARTCREATELEN) +
(comment ? strlen(comment) + 2 : 0));
for (i = 0; i < MAXJOINARGS; i++)
jbuf->jb_channels[i] = 0;
}
/*
* Add a channel to the join buffer
*/
void
joinbuf_join(struct JoinBuf *jbuf, struct Channel *chan, unsigned int flags)
{
unsigned int len;
int is_local;
assert(0 != jbuf);
if (!chan) {
if (jbuf->jb_type == JOINBUF_TYPE_JOIN)
sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect, "0");
return;
}
is_local = IsLocalChannel(chan->chname);
if (jbuf->jb_type == JOINBUF_TYPE_PART ||
jbuf->jb_type == JOINBUF_TYPE_PARTALL) {
struct Membership *member = find_member_link(chan, jbuf->jb_source);
if (IsUserParting(member))
return;
SetUserParting(member);
/* Send notification to channel */
if (!(flags & CHFL_ZOMBIE))
sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_PART, chan, NULL,
(flags & CHFL_BANNED || !jbuf->jb_comment) ?
"%H" : "%H :%s", chan, jbuf->jb_comment);
else if (MyUser(jbuf->jb_source))
sendcmdto_one(jbuf->jb_source, CMD_PART, jbuf->jb_source,
(flags & CHFL_BANNED || !jbuf->jb_comment) ?
"%H" : "%H :%s", chan, jbuf->jb_comment);
/* XXX: Shouldn't we send a PART here anyway? */
/* to users on the channel? Why? From their POV, the user isn't on
* the channel anymore anyway. We don't send to servers until below,
* when we gang all the channel parts together. Note that this is
* exactly the same logic, albeit somewhat more concise, as was in
* the original m_part.c */
/* got to remove user here */
if (jbuf->jb_type == JOINBUF_TYPE_PARTALL || is_local)
remove_user_from_channel(jbuf->jb_source, chan);
} else {
/* Add user to channel */
add_user_to_channel(chan, jbuf->jb_source, flags);
/* send notification to all servers */
if (jbuf->jb_type != JOINBUF_TYPE_CREATE && !IsLocalChannel(chan->chname))
sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect,
"%H %Tu", chan, chan->creationtime);
/* Send the notification to the channel */
sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_JOIN, chan, NULL, "%H", chan);
/* send an op, too, if needed */
if (!MyUser(jbuf->jb_source) && jbuf->jb_type == JOINBUF_TYPE_CREATE)
sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_MODE, chan, NULL, "%H +o %C",
chan, jbuf->jb_source);
}
if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
jbuf->jb_type == JOINBUF_TYPE_JOIN ||
is_local)
return; /* don't send to remote */
/* figure out if channel name will cause buffer to be overflowed */
len = chan ? strlen(chan->chname) + 1 : 2;
if (jbuf->jb_strlen + len > BUFSIZE)
joinbuf_flush(jbuf);
/* add channel to list of channels to send and update counts */
jbuf->jb_channels[jbuf->jb_count++] = chan;
jbuf->jb_strlen += len;
/* if we've used up all slots, flush */
if (jbuf->jb_count >= MAXJOINARGS)
joinbuf_flush(jbuf);
}
/*
* Flush the channel list to remote servers
*/
int
joinbuf_flush(struct JoinBuf *jbuf)
{
char chanlist[BUFSIZE];
int chanlist_i = 0;
int i;
if (!jbuf->jb_count || jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
jbuf->jb_type == JOINBUF_TYPE_JOIN)
return 0; /* no joins to process */
for (i = 0; i < jbuf->jb_count; i++) { /* build channel list */
build_string(chanlist, &chanlist_i,
jbuf->jb_channels[i] ? jbuf->jb_channels[i]->chname : "0", 0,
i == 0 ? '\0' : ',');
if (JOINBUF_TYPE_PART == jbuf->jb_type)
/* Remove user from channel */
remove_user_from_channel(jbuf->jb_source, jbuf->jb_channels[i]);
jbuf->jb_channels[i] = 0; /* mark slot empty */
}
jbuf->jb_count = 0; /* reset base counters */
jbuf->jb_strlen = ((jbuf->jb_type == JOINBUF_TYPE_PART ?
STARTJOINLEN : STARTCREATELEN) +
(jbuf->jb_comment ? strlen(jbuf->jb_comment) + 2 : 0));
/* and send the appropriate command */
switch (jbuf->jb_type) {
case JOINBUF_TYPE_CREATE:
sendcmdto_serv_butone(jbuf->jb_source, CMD_CREATE, jbuf->jb_connect,
"%s %Tu", chanlist, jbuf->jb_create);
break;
case JOINBUF_TYPE_PART:
sendcmdto_serv_butone(jbuf->jb_source, CMD_PART, jbuf->jb_connect,
jbuf->jb_comment ? "%s :%s" : "%s", chanlist,
jbuf->jb_comment);
break;
}
return 0;
}
/* Returns TRUE (1) if client is invited, FALSE (0) if not */
int IsInvited(struct Client* cptr, struct Channel* chptr)
{
struct SLink *lp;
for (lp = (cli_user(cptr))->invited; lp; lp = lp->next)
if (lp->value.chptr == chptr)
return 1;
return 0;
}
syntax highlighted by Code2HTML, v. 0.9.1