/** Handle a JOIN message from a client connection.
* See @ref m_functions for discussion of the arguments.
* @param[in] cptr Client that sent us the message.
* @param[in] sptr Original source of message.
* @param[in] parc Number of arguments.
* @param[in] parv Argument vector.
*/
int m_join(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
struct JoinBuf join;
struct JoinBuf create;
char *p = 0;
char *chanlist;
char *name;
char *keys;
if (parc < 2 || *parv[1] == '\0')
return need_more_params(sptr, "JOIN");
if (!IsAnOper(sptr) && IsRestrictJoin(sptr)) {
send_reply(sptr, ERR_BANNEDFROMCHAN, parv[1]);
return 0;
}
joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
joinbuf_init(&create, sptr, cptr, JOINBUF_TYPE_CREATE, 0, TStime());
chanlist = last0(cptr, sptr, parv[1]); /* find last "JOIN 0" */
keys = parv[2]; /* remember where keys are */
for (name = ircd_strtok(&p, chanlist, ","); name;
name = ircd_strtok(&p, 0, ",")) {
char *key = 0;
/* If we have any more keys, take the first for this channel. */
if (!BadPtr(keys)
&& (keys = strchr(key = keys, ',')))
*keys++ = '\0';
/* Empty keys are the same as no keys. */
if (key && !key[0])
key = 0;
if (!IsChannelName(name) || !strIsIrcCh(name))
{
/* bad channel name */
send_reply(sptr, ERR_NOSUCHCHANNEL, name);
continue;
}
if (cli_user(sptr)->joined >= get_client_maxchans(sptr)
&& !HasPriv(sptr, PRIV_CHAN_LIMIT)) {
send_reply(sptr, ERR_TOOMANYCHANNELS, name);
break; /* no point processing the other channels */
}
do_join(cptr, sptr, &join, &create, name, key, 0);
}
joinbuf_flush(&join); /* must be first, if there's a JOIN 0 */
joinbuf_flush(&create);
return 0;
}
/** Handle a JOIN message from a server connection.
* See @ref m_functions for discussion of the arguments.
* @param[in] cptr Client that sent us the message.
* @param[in] sptr Original source of message.
* @param[in] parc Number of arguments.
* @param[in] parv Argument vector.
*/
int ms_join(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
struct Membership *member;
struct Channel *chptr;
struct JoinBuf join;
unsigned int flags;
time_t creation = 0;
char *p = 0;
char *chanlist;
char *name;
if (IsServer(sptr))
{
return protocol_violation(cptr,
"%s tried to JOIN %s, duh!",
cli_name(sptr),
(parc < 2 || *parv[1] == '\0') ? "a channel" :
parv[1]
);
}
if (parc < 2 || *parv[1] == '\0')
return need_more_params(sptr, "JOIN");
if (parc > 2 && parv[2])
creation = atoi(parv[2]);
joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
chanlist = last0(cptr, sptr, parv[1]); /* find last "JOIN 0" */
for (name = ircd_strtok(&p, chanlist, ","); name;
name = ircd_strtok(&p, 0, ",")) {
flags = CHFL_DEOPPED;
if (IsLocalChannel(name) || !IsChannelName(name))
{
protocol_violation(cptr, "%s tried to join %s", cli_name(sptr), name);
continue;
}
if (!(chptr = FindChannel(name)))
{
/* No channel exists, so create one */
if (!(chptr = get_channel(sptr, name, CGT_CREATE)))
{
protocol_violation(sptr,"couldn't get channel %s for %s",
name,cli_name(sptr));
continue;
}
flags |= HasFlag(sptr, FLAG_TS8) ? CHFL_SERVOPOK : 0;
chptr->creationtime = creation;
}
else { /* We have a valid channel? */
if ((member = find_member_link(chptr, sptr)))
{
/* It is impossible to get here --Run */
if (!IsZombie(member)) /* already on channel */
continue;
flags = member->status & (CHFL_DEOPPED | CHFL_SERVOPOK);
remove_user_from_channel(sptr, chptr);
chptr = FindChannel(name);
}
else
flags |= HasFlag(sptr, FLAG_TS8) ? CHFL_SERVOPOK : 0;
/* Always copy the timestamp when it is older, that is the only way to
ensure network-wide synchronization of creation times.
We now also copy a creation time that only 1 second younger...
this is needed because the timestamp must be incremented
by one when someone joins an existing, but empty, channel.
However, this is only necessary when the channel is still
empty (also here) and when this channel doesn't have +A set.
To prevent this from allowing net-rides on the channel, we
clear all modes from the channel.
(Scenario for a net ride: c1 - s1 - s2 - c2, with c1 the only
user in the channel; c1 parts and rejoins, gaining ops.
Before s2 sees c1's part, c2 joins the channel and parts
immediately. s1 sees c1 part, c1 create, c2 join, c2 part;
c2's join resets the timestamp. s2 sees c2 join, c2 part, c1
part, c1 create; but since s2 sees the channel as a zannel or
non-existent, it does not bounce the create with the newer
timestamp.)
*/
if (creation && (creation < chptr->creationtime ||
(!chptr->mode.apass[0] && chptr->users == 0))) {
struct Membership *member;
struct ModeBuf mbuf;
chptr->creationtime = creation;
/* Wipe out the current modes on the channel. */
modebuf_init(&mbuf, sptr, cptr, chptr, MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK3);
modebuf_mode(&mbuf, MODE_DEL | chptr->mode.mode);
chptr->mode.mode &= MODE_BURSTADDED | MODE_WASDELJOINS;
if (chptr->mode.limit) {
modebuf_mode_uint(&mbuf, MODE_DEL | MODE_LIMIT, chptr->mode.limit);
chptr->mode.limit = 0;
}
if (chptr->mode.key[0]) {
modebuf_mode_string(&mbuf, MODE_DEL | MODE_KEY, chptr->mode.key, 0);
chptr->mode.key[0] = '\0';
}
if (chptr->mode.upass[0]) {
modebuf_mode_string(&mbuf, MODE_DEL | MODE_UPASS, chptr->mode.upass, 0);
chptr->mode.upass[0] = '\0';
}
if (chptr->mode.apass[0]) {
modebuf_mode_string(&mbuf, MODE_DEL | MODE_APASS, chptr->mode.apass, 0);
chptr->mode.apass[0] = '\0';
}
for (member = chptr->members; member; member = member->next_member)
{
if (IsChanOp(member)) {
modebuf_mode_client(&mbuf, MODE_DEL | MODE_CHANOP, member->user, OpLevel(member));
member->status &= ~CHFL_CHANOP;
}
if (HasVoice(member)) {
modebuf_mode_client(&mbuf, MODE_DEL | MODE_VOICE, member->user, OpLevel(member));
member->status &= ~CHFL_VOICE;
}
}
modebuf_flush(&mbuf);
}
}
joinbuf_join(&join, chptr, flags);
}
joinbuf_flush(&join); /* flush joins... */
return 0;
}
/** Handle a JOIN message from a client connection.
* See @ref m_functions for discussion of the arguments.
* @param[in] cptr Client that sent us the message.
* @param[in] sptr Original source of message.
* @param[in] parc Number of arguments.
* @param[in] parv Argument vector.
*/
int m_join(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
struct Channel *chptr;
struct JoinBuf join;
struct JoinBuf create;
struct Gline *gline;
char *p = 0;
char *chanlist;
char *name;
char *keys;
if (parc < 2 || *parv[1] == '\0')
return need_more_params(sptr, "JOIN");
joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
joinbuf_init(&create, sptr, cptr, JOINBUF_TYPE_CREATE, 0, TStime());
chanlist = last0(cptr, sptr, parv[1]); /* find last "JOIN 0" */
keys = parv[2]; /* remember where keys are */
for (name = ircd_strtok(&p, chanlist, ","); name;
name = ircd_strtok(&p, 0, ",")) {
char *key = 0;
/* If we have any more keys, take the first for this channel. */
if (!BadPtr(keys)
&& (keys = strchr(key = keys, ',')))
*keys++ = '\0';
/* Empty keys are the same as no keys. */
if (key && !key[0])
key = 0;
if (!IsChannelName(name) || !strIsIrcCh(name))
{
/* bad channel name */
send_reply(sptr, ERR_NOSUCHCHANNEL, name);
continue;
}
if (cli_user(sptr)->joined >= feature_int(FEAT_MAXCHANNELSPERUSER)
&& !HasPriv(sptr, PRIV_CHAN_LIMIT)) {
send_reply(sptr, ERR_TOOMANYCHANNELS, name);
break; /* no point processing the other channels */
}
/* BADCHANed channel */
if ((gline = gline_find(name, GLINE_BADCHAN | GLINE_EXACT)) &&
GlineIsActive(gline) && !IsAnOper(sptr)) {
send_reply(sptr, ERR_BANNEDFROMCHAN, name);
continue;
}
if (!(chptr = FindChannel(name))) {
if (((name[0] == '&') && !feature_bool(FEAT_LOCAL_CHANNELS))
|| strlen(name) > IRCD_MIN(CHANNELLEN, feature_int(FEAT_CHANNELLEN))) {
send_reply(sptr, ERR_NOSUCHCHANNEL, name);
continue;
}
if (!(chptr = get_channel(sptr, name, CGT_CREATE)))
continue;
/* Try to add the new channel as a recent target for the user. */
if (check_target_limit(sptr, chptr, chptr->chname, 0)) {
chptr->members = 0;
destruct_channel(chptr);
continue;
}
joinbuf_join(&create, chptr, CHFL_CHANOP | CHFL_CHANNEL_MANAGER);
} else if (find_member_link(chptr, sptr)) {
continue; /* already on channel */
} else if (check_target_limit(sptr, chptr, chptr->chname, 0)) {
continue;
} else {
int flags = CHFL_DEOPPED;
int err = 0;
/* Check Apass/Upass -- since we only ever look at a single
* "key" per channel now, this hampers brute force attacks. */
if (key && !strcmp(key, chptr->mode.apass))
flags = CHFL_CHANOP | CHFL_CHANNEL_MANAGER;
else if (key && !strcmp(key, chptr->mode.upass))
flags = CHFL_CHANOP;
else if (chptr->users == 0 && !chptr->mode.apass[0]) {
/* Joining a zombie channel (zannel): give ops and increment TS. */
flags = CHFL_CHANOP;
chptr->creationtime++;
} else if (IsInvited(sptr, chptr)) {
/* Invites bypass these other checks. */
} else if (chptr->mode.mode & MODE_INVITEONLY)
err = ERR_INVITEONLYCHAN;
else if (chptr->mode.limit && (chptr->users >= chptr->mode.limit))
err = ERR_CHANNELISFULL;
else if ((chptr->mode.mode & MODE_REGONLY) && !IsAccount(sptr))
err = ERR_NEEDREGGEDNICK;
else if (find_ban(sptr, chptr->banlist))
err = ERR_BANNEDFROMCHAN;
else if (*chptr->mode.key && (!key || strcmp(key, chptr->mode.key)))
err = ERR_BADCHANNELKEY;
/* An oper with WALK_LCHAN privilege can join a local channel
* he otherwise could not join by using "OVERRIDE" as the key.
* This will generate a HACK(4) notice, but fails if the oper
* could normally join the channel. */
if (IsLocalChannel(chptr->chname)
&& HasPriv(sptr, PRIV_WALK_LCHAN)
&& !(flags & CHFL_CHANOP)
&& key && !strcmp(key, "OVERRIDE"))
{
switch (err) {
case 0:
if (strcmp(chptr->mode.key, "OVERRIDE")
&& strcmp(chptr->mode.apass, "OVERRIDE")
&& strcmp(chptr->mode.upass, "OVERRIDE")) {
send_reply(sptr, ERR_DONTCHEAT, chptr->chname);
continue;
}
break;
case ERR_INVITEONLYCHAN: err = 'i'; break;
case ERR_CHANNELISFULL: err = 'l'; break;
case ERR_BANNEDFROMCHAN: err = 'b'; break;
case ERR_BADCHANNELKEY: err = 'k'; break;
case ERR_NEEDREGGEDNICK: err = 'r'; break;
default: err = '?'; break;
}
/* send accountability notice */
if (err)
sendto_opmask_butone(0, SNO_HACK4, "OPER JOIN: %C JOIN %H "
"(overriding +%c)", sptr, chptr, err);
err = 0;
}
/* Is there some reason the user may not join? */
if (err) {
switch(err) {
case ERR_NEEDREGGEDNICK:
send_reply(sptr,
ERR_NEEDREGGEDNICK,
chptr->chname,
feature_str(FEAT_URLREG));
break;
default:
send_reply(sptr, err, chptr->chname);
break;
}
continue;
}
joinbuf_join(&join, chptr, flags);
if (flags & CHFL_CHANOP) {
struct ModeBuf mbuf;
/* Always let the server op him: this is needed on a net with older servers
because they 'destruct' channels immediately when they become empty without
sending out a DESTRUCT message. As a result, they would always bounce a mode
(as HACK(2)) when the user ops himself.
(There is also no particularly good reason to have the user op himself.)
*/
modebuf_init(&mbuf, &me, cptr, chptr, MODEBUF_DEST_SERVER);
modebuf_mode_client(&mbuf, MODE_ADD | MODE_CHANOP, sptr,
chptr->mode.apass[0] ? ((flags & CHFL_CHANNEL_MANAGER) ? 0 : 1) : MAXOPLEVEL);
modebuf_flush(&mbuf);
}
}
del_invite(sptr, chptr);
if (chptr->topic[0]) {
send_reply(sptr, RPL_TOPIC, chptr->chname, chptr->topic);
send_reply(sptr, RPL_TOPICWHOTIME, chptr->chname, chptr->topic_nick,
chptr->topic_time);
}
do_names(sptr, chptr, NAMES_ALL|NAMES_EON); /* send /names list */
}
joinbuf_flush(&join); /* must be first, if there's a JOIN 0 */
joinbuf_flush(&create);
return 0;
}