/** 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;
}
/*
* mo_gline - oper message handler
*
* parv[0] = Sender prefix
* parv[1] = [[+|-]<G-line mask>]
*
* Local (to me) style:
*
* parv[2] = [Expiration offset]
* parv[3] = [Comment]
*
* Global (or remote local) style:
*
* parv[2] = [target]
* parv[3] = [Expiration offset]
* parv[4] = [Comment]
*
*/
int
mo_gline(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
struct Client *acptr = 0;
struct Gline *agline;
unsigned int flags = 0;
time_t expire_off;
char *mask = parv[1], *target = 0, *reason;
if (parc < 2)
return gline_list(sptr, 0);
if (*mask == '!') {
mask++;
if (HasPriv(sptr, PRIV_WIDE_GLINE))
flags |= GLINE_OPERFORCE;
}
if (*mask == '+') {
flags |= GLINE_ACTIVE;
mask++;
} else if (*mask == '-')
mask++;
else
return gline_list(sptr, mask);
if (parc == 4) {
expire_off = atoi(parv[2]);
reason = parv[3];
flags |= GLINE_LOCAL;
} else if (parc > 4) {
target = parv[2];
expire_off = atoi(parv[3]);
reason = parv[4];
} else
return need_more_params(sptr, "GLINE");
if (target)
{
if (!(target[0] == '*' && target[1] == '\0'))
{
if (!(acptr = find_match_server(target)))
return send_reply(sptr, ERR_NOSUCHSERVER, target);
/* manually propagate, since we don't set it */
if (!IsMe(acptr))
{
if (!feature_bool(FEAT_CONFIG_OPERCMDS))
return send_reply(sptr, ERR_DISABLED, "GLINE");
if (!HasPriv(sptr, PRIV_GLINE))
return send_reply(sptr, ERR_NOPRIVILEGES);
sendcmdto_one(sptr, CMD_GLINE, acptr, "%C %s%c%s %s %Tu :%s", acptr,
flags & GLINE_OPERFORCE ? "!" : "",
flags & GLINE_ACTIVE ? '+' : '-', mask, parv[3],
TStime(), reason);
return 0;
}
flags |= GLINE_LOCAL;
}
}
if (!(flags & GLINE_LOCAL) && !feature_bool(FEAT_CONFIG_OPERCMDS))
return send_reply(sptr, ERR_DISABLED, "GLINE");
if (!HasPriv(sptr, (flags & GLINE_LOCAL ? PRIV_LOCAL_GLINE : PRIV_GLINE)))
return send_reply(sptr, ERR_NOPRIVILEGES);
agline = gline_find(mask, GLINE_ANY | GLINE_EXACT);
if (agline) {
if (GlineIsLocal(agline) && !(flags & GLINE_LOCAL)) /* global over local */
gline_free(agline);
else {
if (!GlineLastMod(agline)) /* force mods to Uworld-set G-lines local */
flags |= GLINE_LOCAL;
if (flags & GLINE_ACTIVE)
return gline_activate(cptr, sptr, agline,
GlineLastMod(agline) ? TStime() : 0, flags);
else
return gline_deactivate(cptr, sptr, agline,
GlineLastMod(agline) ? TStime() : 0, flags);
}
}
return gline_add(cptr, sptr, mask, reason, expire_off, TStime(), flags);
}
/*
* ms_gline - server message handler
*
* parv[0] = Sender prefix
* parv[1] = Target: server numeric
* parv[2] = (+|-)<G-line mask>
* parv[3] = G-line lifetime
*
* From Uworld:
*
* parv[4] = Comment
*
* From somewhere else:
*
* parv[4] = Last modification time
* parv[5] = Comment
*
*/
int
ms_gline(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
struct Client *acptr = 0;
struct Gline *agline;
unsigned int flags = 0;
time_t expire_off, lastmod = 0;
char *mask = parv[2], *target = parv[1], *reason = "No reason";
if (*mask == '!')
{
mask++;
flags |= GLINE_OPERFORCE; /* assume oper had WIDE_GLINE */
}
if ((parc == 3 && *mask == '-') || parc == 5)
{
if (!find_conf_byhost(cli_confs(cptr), cli_name(sptr), CONF_UWORLD))
return need_more_params(sptr, "GLINE");
flags |= GLINE_FORCE;
}
else if (parc > 5)
lastmod = atoi(parv[4]);
else
return need_more_params(sptr, "GLINE");
if (parc > 4)
reason = parv[parc - 1];
if (IsServer(sptr))
flags |= GLINE_FORCE;
if (!(target[0] == '*' && target[1] == '\0')) {
if (!( (acptr = FindNServer(target)) ||
(acptr = SeekServer(target)) ) )
return 0; /* no such server */
if (!IsMe(acptr)) { /* manually propagate */
if (!lastmod)
sendcmdto_one(sptr, CMD_GLINE, acptr,
(parc == 3) ? "%s %s" : "%s %s %s :%s", target, mask,
parv[3], reason);
else
sendcmdto_one(sptr, CMD_GLINE, acptr, "%s %s%s %s %s :%s", target,
flags & GLINE_OPERFORCE ? "!" : "", mask, parv[3],
parv[4], reason);
return 0;
}
/* For asuka we don't want glines sent this way treated as local
* flags |= GLINE_LOCAL;
*/
}
if (*mask == '-')
mask++;
else if (*mask == '+') {
flags |= GLINE_ACTIVE;
mask++;
} else
flags |= GLINE_ACTIVE;
expire_off = parc < 5 ? 0 : atoi(parv[3]);
agline = gline_find(mask, GLINE_ANY | GLINE_EXACT);
if (agline) {
if (GlineIsLocal(agline) && !(flags & GLINE_LOCAL)) /* global over local */
gline_free(agline);
else if (!lastmod && ((flags & GLINE_ACTIVE) == GlineIsRemActive(agline)))
return gline_propagate(cptr, sptr, agline);
else if (!lastmod || GlineLastMod(agline) < lastmod) { /* new mod */
if (flags & GLINE_ACTIVE)
return gline_activate(cptr, sptr, agline, lastmod, flags);
else
return gline_deactivate(cptr, sptr, agline, lastmod, flags);
} else if (GlineLastMod(agline) == lastmod || IsBurstOrBurstAck(cptr))
return 0;
else
return gline_resend(cptr, agline); /* other server desynched WRT gline */
} else if (parc == 3 && !(flags & GLINE_ACTIVE)) {
/* U-lined server removing a G-line we don't have; propagate the removal
* anyway.
*/
if (!(flags & GLINE_LOCAL))
sendcmdto_serv_butone(sptr, CMD_GLINE, cptr, "* -%s", mask);
return 0;
} else if (parc < 5)
return need_more_params(sptr, "GLINE");
return gline_add(cptr, sptr, mask, reason, expire_off, lastmod, flags);
}
/** Handle a GLINE message from a server.
*
* \a parv has the following elements:
* \li \a parv[1] is the target server numnick or "*" for all servers
* \li \a parv[2] is the G-line mask (preceded by modifier flags)
* \li \a parv[3] is the G-line lifetime in seconds
* \li \a parv[4] (optional) is the G-line's last modification time
* \li \a parv[\a parc - 1] is the G-line comment
*
* If the issuer is a server or there is no timestamp, the issuer must
* be flagged as a UWorld server. In this case, if the '-' modifier
* flag is used, the G-line lifetime and all following arguments may
* be omitted.
*
* Three modifier flags are recognized, and must be present in this
* order:
* \li '!' Indicates an G-line that an oper forcibly applied.
* \li '-' Indicates that the following G-line should be removed.
* \li '+' (exclusive of '-') indicates that the G-line should be
* activated.
*
* 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_gline(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
struct Client *acptr = 0;
struct Gline *agline = 0;
unsigned int flags = 0;
enum GlineAction action = GLINE_MODIFY;
time_t expire = 0, lastmod = 0, lifetime = 0;
char *mask = parv[2], *target = parv[1], *reason = "No reason", *tmp = 0;
if (parc < 3)
return need_more_params(sptr, "GLINE");
if (IsServer(sptr))
flags |= GLINE_FORCE;
if (*mask == '!') {
mask++;
flags |= GLINE_OPERFORCE; /* assume oper had WIDE_GLINE */
}
switch (*mask) { /* handle +, -, <, and > */
case '+': /* activate the G-line */
action = GLINE_ACTIVATE;
mask++;
break;
case '-': /* deactivate the G-line */
action = GLINE_DEACTIVATE;
mask++;
break;
case '>': /* locally activate the G-line */
action = GLINE_LOCAL_ACTIVATE;
mask++;
break;
case '<': /* locally deactivate the G-line */
action = GLINE_LOCAL_DEACTIVATE;
mask++;
break;
}
/* Is there no mask left? */
if (mask[0] == '\0')
return need_more_params(sptr, "GLINE");
/* Now, let's figure out if it's a local or global G-line */
if (action == GLINE_LOCAL_ACTIVATE || action == GLINE_LOCAL_DEACTIVATE ||
(target[0] == '*' && target[1] == '\0'))
flags |= GLINE_GLOBAL;
else
flags |= GLINE_LOCAL;
/* now figure out if we need to resolve a server */
if ((action == GLINE_LOCAL_ACTIVATE || action == GLINE_LOCAL_DEACTIVATE ||
(flags & GLINE_LOCAL)) && !(acptr = FindNServer(target)))
return 0; /* no such server, jump out */
/* If it's a local activate/deactivate and server isn't me, propagate it */
if ((action == GLINE_LOCAL_ACTIVATE || action == GLINE_LOCAL_DEACTIVATE) &&
!IsMe(acptr)) {
Debug((DEBUG_DEBUG, "I am forwarding a local change to a global gline "
"to a remote server; target %s, mask %s, operforce %s, action %c",
target, mask, flags & GLINE_OPERFORCE ? "YES" : "NO",
action == GLINE_LOCAL_ACTIVATE ? '>' : '<'));
sendcmdto_one(sptr, CMD_GLINE, acptr, "%C %s%c%s", acptr,
flags & GLINE_OPERFORCE ? "!" : "",
action == GLINE_LOCAL_ACTIVATE ? '>' : '<', mask);
return 0; /* all done */
}
/* Next, try to find the G-line... */
if ((flags & GLINE_GLOBAL) || IsMe(acptr)) /* don't bother if it's not me! */
agline = gline_find(mask, flags | GLINE_ANY | GLINE_EXACT);
/* We now have all the pieces to tell us what we've got; let's put
* it all together and convert the rest of the arguments.
*/
/* Handle the local G-lines first... */
if (flags & GLINE_LOCAL) {
assert(acptr);
/* normalize the action, first */
if (action == GLINE_LOCAL_ACTIVATE || action == GLINE_MODIFY)
action = GLINE_ACTIVATE;
else if (action == GLINE_LOCAL_DEACTIVATE)
action = GLINE_DEACTIVATE;
if (action == GLINE_ACTIVATE) { /* get expiration and reason */
if (parc < 5) /* check parameter count... */
return need_more_params(sptr, "GLINE");
expire = atoi(parv[3]); /* get expiration... */
expire = abs_expire(expire); /* convert to absolute... */
reason = parv[parc - 1]; /* and reason */
if (IsMe(acptr)) {
if (agline) /* G-line already exists, so let's ignore it... */
return 0;
/* OK, create the local G-line */
Debug((DEBUG_DEBUG, "I am creating a local G-line here; target %s, "
"mask %s, operforce %s, action %s, expire %Tu, reason: %s",
target, mask, flags & GLINE_OPERFORCE ? "YES" : "NO",
action == GLINE_ACTIVATE ? "+" : "-", expire, reason));
return gline_add(cptr, sptr, mask, reason, expire, lastmod,
lifetime, flags | GLINE_ACTIVE);
}
} else if (IsMe(acptr)) { /* destroying a local G-line */
if (!agline) /* G-line doesn't exist, so let's complain... */
return send_reply(sptr, ERR_NOSUCHGLINE, mask);
/* Let's now destroy the G-line */;
Debug((DEBUG_DEBUG, "I am destroying a local G-line here; target %s, "
"mask %s, operforce %s, action %s", target, mask,
flags & GLINE_OPERFORCE ? "YES" : "NO",
action == GLINE_ACTIVATE ? "+" : "-"));
return gline_destroy(cptr, sptr, agline);
}
/* OK, we've converted arguments; if it's not for us, forward */
/* UPDATE NOTE: Once all servers are updated to u2.10.12.11, the
* format string in this sendcmdto_one() may be updated to omit
* <lastmod> for GLINE_ACTIVATE and to omit <expire>, <lastmod>,
* and <reason> for GLINE_DEACTIVATE.
*/
assert(!IsMe(acptr));
Debug((DEBUG_DEBUG, "I am forwarding a local G-line to a remote server; "
"target %s, mask %s, operforce %s, action %c, expire %Tu, "
"lastmod %Tu, reason: %s", target, mask,
flags & GLINE_OPERFORCE ? "YES" : "NO",
action == GLINE_ACTIVATE ? '+' : '-', expire, TStime(),
reason));
sendcmdto_one(sptr, CMD_GLINE, acptr, "%C %s%c%s %Tu %Tu :%s",
acptr, flags & GLINE_OPERFORCE ? "!" : "",
action == GLINE_ACTIVATE ? '+' : '-', mask,
expire - TStime(), TStime(), reason);
return 0; /* all done */
}
/* can't modify a G-line that doesn't exist, so remap to activate */
if (!agline && action == GLINE_MODIFY)
action = GLINE_ACTIVATE;
/* OK, let's figure out what other parameters we may have... */
switch (action) {
case GLINE_LOCAL_ACTIVATE: /* locally activating a G-line */
case GLINE_LOCAL_DEACTIVATE: /* locally deactivating a G-line */
if (!agline) /* no G-line to locally activate or deactivate? */
return send_reply(sptr, ERR_NOSUCHGLINE, mask);
lastmod = agline->gl_lastmod;
break; /* no additional parameters to manipulate */
case GLINE_ACTIVATE: /* activating a G-line */
case GLINE_DEACTIVATE: /* deactivating a G-line */
/* in either of these cases, we have at least a lastmod parameter */
if (parc < 4)
return need_more_params(sptr, "GLINE");
else if (parc == 4) /* lastmod only form... */
lastmod = atoi(parv[3]);
/*FALLTHROUGH*/
case GLINE_MODIFY: /* modifying a G-line */
/* convert expire and lastmod, look for lifetime and reason */
if (parc > 4) { /* protect against fall-through from 4-param form */
expire = atoi(parv[3]); /* convert expiration and lastmod */
expire = abs_expire(expire);
lastmod = atoi(parv[4]);
flags |= GLINE_EXPIRE; /* we have an expiration time update */
if (parc > 6) { /* no question, have a lifetime and reason */
lifetime = atoi(parv[5]);
reason = parv[parc - 1];
flags |= GLINE_LIFETIME | GLINE_REASON;
} else if (parc == 6) { /* either a lifetime or a reason */
if (!agline || /* gline creation, has to be the reason */
/* trial-convert as lifetime, and if it doesn't fully convert,
* it must be the reason */
(!(lifetime = strtoul(parv[5], &tmp, 10)) && !*tmp)) {
lifetime = 0;
reason = parv[5];
flags |= GLINE_REASON; /* have a reason update */
} else if (lifetime)
flags |= GLINE_LIFETIME; /* have a lifetime update */
}
}
}
if (!lastmod) /* must have a lastmod parameter by now */
return need_more_params(sptr, "GLINE");
Debug((DEBUG_DEBUG, "I have a global G-line I am acting upon now; "
"target %s, mask %s, operforce %s, action %s, expire %Tu, "
"lastmod %Tu, lifetime %Tu, reason: %s; gline %s! (fields "
"present: %s %s %s)", target, mask,
flags & GLINE_OPERFORCE ? "YES" : "NO",
action == GLINE_ACTIVATE ? "+" :
(action == GLINE_DEACTIVATE ? "-" :
(action == GLINE_LOCAL_ACTIVATE ? ">" :
(action == GLINE_LOCAL_DEACTIVATE ? "<" : "(MODIFY)"))),
expire, lastmod, lifetime, reason,
agline ? "EXISTS" : "does not exist",
flags & GLINE_EXPIRE ? "expire" : "",
flags & GLINE_LIFETIME ? "lifetime" : "",
flags & GLINE_REASON ? "reason" : ""));
/* OK, at this point, we have converted all available parameters.
* Let's actually do the action!
*/
if (agline)
return gline_modify(cptr, sptr, agline, action, reason, expire,
lastmod, lifetime, flags);
assert(action != GLINE_LOCAL_ACTIVATE);
assert(action != GLINE_LOCAL_DEACTIVATE);
assert(action != GLINE_MODIFY);
if (!expire) { /* Cannot *add* a G-line we don't have, but try hard */
Debug((DEBUG_DEBUG, "Propagating G-line %s for G-line we don't have",
action == GLINE_ACTIVATE ? "activation" : "deactivation"));
/* propagate the G-line, even though we don't have it */
sendcmdto_serv(sptr, CMD_GLINE, cptr, "* %c%s %Tu",
action == GLINE_ACTIVATE ? '+' : '-',
mask, lastmod);
return 0;
}
return gline_add(cptr, sptr, mask, reason, expire, lastmod, lifetime,
flags | ((action == GLINE_ACTIVATE) ? GLINE_ACTIVE : 0));
}
/** Handle a GLINE message from an operator.
*
* \a parv has the following elements:
* \li \a parv[1] is the G-line mask (preceded by modifier flags)
* \li \a parv[2] (optional) is the target server numnick or '*'
* \li \a parv[N+1] is the G-line lifetime in seconds
* \li \a parv[\a parc - 1] is the G-line comment
*
* Three modifier flags are recognized, and must be present in this
* order:
* \li '!' Indicates an G-line that an oper forcibly applied.
* \li '-' Indicates that the following G-line should be removed.
* \li '+' (exclusive of '-') indicates that the G-line should be
* activated.
*
* 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
mo_gline(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
struct Client *acptr = 0;
struct Gline *agline = 0;
unsigned int flags = 0;
enum GlineAction action = GLINE_MODIFY;
time_t expire = 0;
char *mask = parv[1], *target = 0, *reason = 0, *end;
if (parc < 2)
return gline_list(sptr, 0);
if (*mask == '!') {
mask++;
if (HasPriv(sptr, PRIV_WIDE_GLINE))
flags |= GLINE_OPERFORCE;
}
switch (*mask) { /* handle +, -, <, and > */
case '+': /* activate the G-line */
action = GLINE_ACTIVATE;
mask++;
break;
case '-': /* deactivate the G-line */
action = GLINE_DEACTIVATE;
mask++;
break;
case '>': /* locally activate the G-line */
action = GLINE_LOCAL_ACTIVATE;
mask++;
break;
case '<': /* locally deactivate the G-line */
action = GLINE_LOCAL_DEACTIVATE;
mask++;
break;
}
/* OK, let's figure out the parameters... */
switch (action) {
case GLINE_MODIFY: /* no specific action on the G-line... */
if (parc == 2) /* user wants a listing of a specific G-line */
return gline_list(sptr, mask);
else if (parc < 4) /* must have target and expire, minimum */
return need_more_params(sptr, "GLINE");
target = parv[2]; /* get the target... */
expire = strtol(parv[3], &end, 10) + TStime(); /* and the expiration */
if (*end != '\0')
return send_reply(sptr, SND_EXPLICIT | ERR_BADEXPIRE, "%s :Bad expire time", parv[3]);
flags |= GLINE_EXPIRE; /* remember that we got an expire time */
if (parc > 4) { /* also got a reason... */
reason = parv[parc - 1];
flags |= GLINE_REASON;
}
/* target is not global, interpolate action and require reason */
if (target[0] != '*' || target[1] != '\0') {
if (!reason) /* have to have a reason for this */
return need_more_params(sptr, "GLINE");
action = GLINE_ACTIVATE;
}
break;
case GLINE_LOCAL_ACTIVATE: /* locally activate a G-line */
case GLINE_LOCAL_DEACTIVATE: /* locally deactivate a G-line */
if (parc > 2) { /* if target is available, pick it */
target = parv[2];
if (target[0] == '*' && target[1] == '\0')
return send_reply(sptr, ERR_NOSUCHSERVER, target);
}
break;
case GLINE_ACTIVATE: /* activating/adding a G-line */
case GLINE_DEACTIVATE: /* deactivating/removing a G-line */
if (parc < 3)
return need_more_params(sptr, "GLINE");
if (parc > 3) {
/* get expiration and target */
reason = parv[parc - 1];
expire = strtol(parv[parc - 2], &end, 10) + TStime();
if (*end != '\0')
return send_reply(sptr, SND_EXPLICIT | ERR_BADEXPIRE, "%s :Bad expire time", parv[parc - 2]);
flags |= GLINE_EXPIRE | GLINE_REASON; /* remember that we got 'em */
if (parc > 4) /* also have a target! */
target = parv[2];
} else {
target = parv[2]; /* target has to be present, and has to be '*' */
if (target[0] != '*' || target[1] != '\0')
return need_more_params(sptr, "GLINE");
}
break;
}
/* Is there no mask left? */
if (mask[0] == '\0')
return need_more_params(sptr, "GLINE");
/* Now let's figure out which is the target server */
if (!target) /* no target, has to be me... */
acptr = &me;
/* if it's not '*', look up the server */
else if ((target[0] != '*' || target[1] != '\0') &&
!(acptr = find_match_server(target)))
return send_reply(sptr, ERR_NOSUCHSERVER, target);
/* Now, is the G-line local or global? */
if (action == GLINE_LOCAL_ACTIVATE || action == GLINE_LOCAL_DEACTIVATE ||
!acptr)
flags |= GLINE_GLOBAL;
else /* it's some form of local G-line */
flags |= GLINE_LOCAL;
/* If it's a local activate/deactivate and server isn't me, propagate it */
if ((action == GLINE_LOCAL_ACTIVATE || action == GLINE_LOCAL_DEACTIVATE) &&
!IsMe(acptr)) {
/* check for permissions... */
if (!feature_bool(FEAT_CONFIG_OPERCMDS))
return send_reply(sptr, ERR_DISABLED, "GLINE");
else if (!HasPriv(sptr, PRIV_GLINE))
return send_reply(sptr, ERR_NOPRIVILEGES);
Debug((DEBUG_DEBUG, "I am forwarding a local change to a global gline "
"to a remote server; target %s, mask %s, operforce %s, action %c",
cli_name(acptr), mask, flags & GLINE_OPERFORCE ? "YES" : "NO",
action == GLINE_LOCAL_ACTIVATE ? '>' : '<'));
sendcmdto_one(sptr, CMD_GLINE, acptr, "%C %s%c%s", acptr,
flags & GLINE_OPERFORCE ? "!" : "",
action == GLINE_LOCAL_ACTIVATE ? '>' : '<', mask);
return 0; /* all done */
}
/* Next, try to find the G-line... */
if ((flags & GLINE_GLOBAL) || IsMe(acptr)) /* don't bother if it's not me! */
agline = gline_find(mask, flags | GLINE_ANY | GLINE_EXACT);
/* We now have all the pieces to tell us what we've got; let's put
* it all together and convert the rest of the arguments.
*/
/* Handle the local G-lines first... */
if (flags & GLINE_LOCAL) {
assert(acptr);
/* normalize the action, first */
if (action == GLINE_LOCAL_ACTIVATE || action == GLINE_MODIFY)
action = GLINE_ACTIVATE;
else if (action == GLINE_LOCAL_DEACTIVATE)
action = GLINE_DEACTIVATE;
/* If it's not for us, forward */
/* UPDATE NOTE: Once all servers are updated to u2.10.12.11, the
* format string in this sendcmdto_one() may be updated to omit
* <lastmod> for GLINE_ACTIVATE and to omit <expire>, <lastmod>,
* and <reason> for GLINE_DEACTIVATE.
*/
if (!IsMe(acptr)) {
/* check for permissions... */
if (!feature_bool(FEAT_CONFIG_OPERCMDS))
return send_reply(sptr, ERR_DISABLED, "GLINE");
else if (!HasPriv(sptr, PRIV_GLINE))
return send_reply(sptr, ERR_NOPRIVILEGES);
Debug((DEBUG_DEBUG, "I am forwarding a local G-line to a remote "
"server; target %s, mask %s, operforce %s, action %c, "
"expire %Tu, reason %s", target, mask,
flags & GLINE_OPERFORCE ? "YES" : "NO",
action == GLINE_ACTIVATE ? '+' : '-', expire, reason));
sendcmdto_one(sptr, CMD_GLINE, acptr, "%C %s%c%s %Tu %Tu :%s",
acptr, flags & GLINE_OPERFORCE ? "!" : "",
action == GLINE_ACTIVATE ? '+' : '-', mask,
expire - TStime(), TStime(), reason);
return 0; /* all done */
}
/* check local G-line permissions... */
if (!HasPriv(sptr, PRIV_LOCAL_GLINE))
return send_reply(sptr, ERR_NOPRIVILEGES);
/* let's handle activation... */
if (action == GLINE_ACTIVATE) {
if (agline) /* G-line already exists, so let's ignore it... */
return 0;
/* OK, create the local G-line */
Debug((DEBUG_DEBUG, "I am creating a local G-line here; target %s, "
"mask %s, operforce %s, action %s, expire %Tu, reason: %s",
target, mask, flags & GLINE_OPERFORCE ? "YES" : "NO",
action == GLINE_ACTIVATE ? "+" : "-", expire, reason));
return gline_add(cptr, sptr, mask, reason, expire, 0, 0,
flags | GLINE_ACTIVE);
} else { /* OK, it's a deactivation/destruction */
if (!agline) /* G-line doesn't exist, so let's complain... */
return send_reply(sptr, ERR_NOSUCHGLINE, mask);
/* Let's now destroy the G-line */
Debug((DEBUG_DEBUG, "I am destroying a local G-line here; target %s, "
"mask %s, operforce %s, action %s", target, mask,
flags & GLINE_OPERFORCE ? "YES" : "NO",
action == GLINE_ACTIVATE ? "+" : "-"));
return gline_destroy(cptr, sptr, agline);
}
}
/* can't modify a G-line that doesn't exist...
* (and if we are creating a new one, we need a reason and expiration)
*/
if (!agline &&
(action == GLINE_MODIFY || action == GLINE_LOCAL_ACTIVATE ||
action == GLINE_LOCAL_DEACTIVATE || !reason || !expire))
return send_reply(sptr, ERR_NOSUCHGLINE, mask);
/* check for G-line permissions... */
if (action == GLINE_LOCAL_ACTIVATE || action == GLINE_LOCAL_DEACTIVATE) {
/* only need local privileges for locally-limited status changes */
if (!HasPriv(sptr, PRIV_LOCAL_GLINE))
return send_reply(sptr, ERR_NOPRIVILEGES);
} else { /* global privileges required */
if (!feature_bool(FEAT_CONFIG_OPERCMDS))
return send_reply(sptr, ERR_DISABLED, "GLINE");
else if (!HasPriv(sptr, PRIV_GLINE))
return send_reply(sptr, ERR_NOPRIVILEGES);
}
Debug((DEBUG_DEBUG, "I have a global G-line I am acting upon now; "
"target %s, mask %s, operforce %s, action %s, expire %Tu, "
"reason: %s; gline %s! (fields present: %s %s)", target,
mask, flags & GLINE_OPERFORCE ? "YES" : "NO",
action == GLINE_ACTIVATE ? "+" :
(action == GLINE_DEACTIVATE ? "-" :
(action == GLINE_LOCAL_ACTIVATE ? ">" :
(action == GLINE_LOCAL_DEACTIVATE ? "<" : "(MODIFY)"))),
expire, reason, agline ? "EXISTS" : "does not exist",
flags & GLINE_EXPIRE ? "expire" : "",
flags & GLINE_REASON ? "reason" : ""));
if (agline) /* modifying an existing G-line */
return gline_modify(cptr, sptr, agline, action, reason, expire,
TStime(), 0, flags);
assert(action != GLINE_LOCAL_ACTIVATE);
assert(action != GLINE_LOCAL_DEACTIVATE);
assert(action != GLINE_MODIFY);
/* create a new G-line */
return gline_add(cptr, sptr, mask, reason, expire, TStime(), 0,
flags | ((action == GLINE_ACTIVATE) ? GLINE_ACTIVE : 0));
}
void do_join(struct Client *cptr, struct Client *sptr, struct JoinBuf *join,
struct JoinBuf *create, char *chan, char *key, int level)
{
struct Channel *chptr;
struct Gline *gline;
/* BADCHANed channel */
if ((gline = gline_find(chan, GLINE_BADCHAN | GLINE_EXACT)) &&
GlineIsActive(gline) && !IsAnOper(sptr)) {
send_reply(sptr, ERR_BANNEDFROMCHAN, chan);
return;
}
/* Bouncy +L joins */
if (level > feature_int(FEAT_MAX_BOUNCE)) {
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Couldn't join %s ! - Redirection (+L) setting was too bouncy", sptr, chan);
return;
}
if (!(chptr = FindChannel(chan))) {
if (((chan[0] == '&') && !feature_bool(FEAT_LOCAL_CHANNELS))
|| strlen(chan) > IRCD_MIN(CHANNELLEN, feature_int(FEAT_CHANNELLEN))) {
send_reply(sptr, ERR_NOSUCHCHANNEL, chan);
return;
}
if (feature_bool(FEAT_CHANNEL_CREATE_IRCOPONLY) && !IsAnOper(sptr) && !IsChannelService(sptr)) {
send_reply(sptr, ERR_NOSUCHCHANNEL, chan);
return;
}
if (!(chptr = get_channel(sptr, chan, CGT_CREATE)))
return;
/* 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);
return;
}
joinbuf_join(create, chptr, CHFL_CHANOP | CHFL_CHANNEL_MANAGER);
} else if (find_member_link(chptr, sptr)) {
return; /* already on channel */
} else if (check_target_limit(sptr, chptr, chptr->chname, 0)) {
return;
} else {
int flags = CHFL_DEOPPED;
int err = 0;
int excepted = 0;
int exceptkli = 0;
struct Ban *ban = NULL;
if (*chptr->mode.redir && (*chptr->mode.redir != '\0')) {
if (chptr->users >= chptr->mode.limit) {
if (IsNoLink(sptr))
send_reply(sptr, ERR_LINKCHAN, chptr->chname, chptr->mode.redir);
else if (!IsChannelName(chptr->mode.redir) || !strIsIrcCh(chptr->mode.redir))
send_reply(sptr, ERR_NOSUCHCHANNEL, chptr->mode.redir);
else {
send_reply(sptr, ERR_LINKSET, chptr->chname, chptr->chname, chptr->mode.redir);
do_join(cptr, sptr, join, create, chptr->mode.redir, key, level+1);
}
return;
}
}
if (find_ban(sptr, chptr->exceptlist, EBAN_EXCEPTLIST, 0)) {
if (feature_bool(FEAT_CHMODE_e_CHMODEEXCEPTION))
exceptkli = 1;
excepted = 1;
}
/* Check Apass/Upass -- since we only ever look at a single
* "key" per channel now, this hampers brute force attacks. */
if (feature_bool(FEAT_CHMODE_Z_STRICT) && (chptr->mode.exmode & EXMODE_SSLONLY) && !IsSSL(sptr))
err = ERR_SSLONLYCHAN;
else 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] && !(chptr->mode.exmode & EXMODE_PERSIST)) {
/* Joining a zombie channel (zannel): give ops and increment TS. */
flags = CHFL_CHANOP;
chptr->creationtime++;
} else if (IsXtraOp(sptr)) {
/* XtraOp bypasses all other checks. */
} else if ((chptr->mode.exmode & EXMODE_SSLONLY) && !IsSSL(sptr))
err = ERR_SSLONLYCHAN;
else if (IsInvited(sptr, chptr)) {
/* Invites bypass these other checks. */
} else if (*chptr->mode.key && (!key || strcmp(key, chptr->mode.key)) && !exceptkli)
err = ERR_BADCHANNELKEY;
else if (*chptr->mode.key && feature_bool(FEAT_FLEXIBLEKEYS) && (key && !strcmp(key, chptr->mode.key))) {
/* Assume key checked by previous condition was found to be correct
and allow join because FEAT_FLEXIBLEKEYS was enabled */
} else if ((chptr->mode.mode & MODE_INVITEONLY) && !exceptkli)
err = ERR_INVITEONLYCHAN;
else if (chptr->mode.limit && (chptr->users >= chptr->mode.limit) && !exceptkli)
err = ERR_CHANNELISFULL;
else if ((chptr->mode.mode & MODE_REGONLY) && !IsAccount(sptr))
err = ERR_NEEDREGGEDNICK;
else if ((chptr->mode.exmode & EXMODE_ADMINONLY) && !IsAdmin(sptr))
err = ERR_ADMINONLYCHAN;
else if ((chptr->mode.exmode & EXMODE_OPERONLY) && !IsAnOper(sptr))
err = ERR_OPERONLYCHAN;
else if ((ban = find_ban(sptr, chptr->banlist, EBAN_NONE, 0)) && !excepted)
err = ERR_BANNEDFROMCHAN;
/* 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);
return;
}
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;
case ERR_ADMINONLYCHAN: err = 'a'; break;
case ERR_OPERONLYCHAN: err = 'O'; break;
case ERR_SSLONLYCHAN: err = 'Z'; 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;
}
return;
}
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 */
}
