/*
* ms_account - server message handler
*
* parv[0] = sender prefix
* parv[1] = numeric of client to act on
* parv[2] = account name (12 characters or less)
*/
int ms_account(struct Client* cptr, struct Client* sptr, int parc,
char* parv[])
{
struct Client *acptr;
int hidden;
if (parc < 3)
return need_more_params(sptr, "ACCOUNT");
if (!IsServer(sptr))
return protocol_violation(cptr, "ACCOUNT from non-server %s",
cli_name(sptr));
if (!(acptr = findNUser(parv[1])))
return 0; /* Ignore ACCOUNT for a user that QUIT; probably crossed */
if (IsAccount(acptr))
return protocol_violation(cptr, "ACCOUNT for already registered user %s "
"(%s -> %s)", cli_name(acptr),
cli_user(acptr)->account, parv[2]);
assert(0 == cli_user(acptr)->account[0]);
if (strlen(parv[2]) > ACCOUNTLEN) {
return protocol_violation(cptr, "Received account (%s) longer than %d for %s; ignoring.", parv[2], ACCOUNTLEN, cli_name(acptr));
}
if (parc > 3) {
cli_user(acptr)->acc_create = atoi(parv[3]);
Debug((DEBUG_DEBUG, "Received timestamped account: account \"%s\", "
"timestamp %Tu", parv[2], cli_user(acptr)->acc_create));
}
hidden = HasHiddenHost(acptr);
SetAccount(acptr);
ircd_strncpy(cli_user(acptr)->account, parv[2], ACCOUNTLEN);
if (!hidden)
hide_hostmask(acptr);
sendcmdto_serv_butone(sptr, CMD_ACCOUNT, cptr,
cli_user(acptr)->acc_create ? "%C %s %Tu" : "%C %s",
acptr, cli_user(acptr)->account,
cli_user(acptr)->acc_create);
return 0;
}
/*
* ms_kill - server message handler
*
* NOTE: IsServer(cptr) == true;
*
* parv[0] = sender prefix
* parv[1] = kill victim
* parv[parc-1] = kill path
*/
int ms_kill(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Client* victim;
char* path;
char* msg;
assert(0 != cptr);
assert(0 != sptr);
assert(IsServer(cptr));
/*
* XXX - a server sending less than 3 params could really desync
* things
*/
if (parc < 3) {
protocol_violation(sptr,"Too few arguments for KILL");
return need_more_params(sptr, "KILL");
}
path = parv[parc - 1]; /* Either defined or NULL (parc >= 3) */
if (!(msg = strchr(path, ' '))) /* Extract out the message */
msg = "(No reason supplied)";
else
*(msg++) = '\0'; /* Remove first character (space) and terminate path */
if (!(victim = findNUser(parv[1]))) {
if (IsUser(sptr))
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :KILL target disconnected "
"before I got him :(", sptr);
return 0;
}
/*
* We *can* have crossed a NICK with this numeric... --Run
*
* Note the following situation:
* KILL SAA --> X
* <-- S NICK ... SAA | <-- SAA QUIT <-- S NICK ... SAA <-- SQUIT S
* Where the KILL reaches point X before the QUIT does.
* This would then *still* cause an orphan because the KILL doesn't reach S
* (because of the SQUIT), the QUIT is ignored (because of the KILL)
* and the second NICK ... SAA causes an orphan on the server at the
* right (which then isn't removed when the SQUIT arrives).
* Therefore we still need to detect numeric nick collisions too.
*
* Bounce the kill back to the originator, if the client can't be found
* by the next hop (short lag) the bounce won't propagate further.
*/
if (MyConnect(victim)) {
sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (Ghost 5 Numeric Collided)",
victim, path);
}
return do_kill(cptr, sptr, victim, cli_name(cptr), path, msg);
}
/*
* ms_svsident - server message handler
*
* parv[0] = sender prefix
* parv[1] = Target numeric
* parv[2] = New ident
*/
int ms_svsident(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Client *acptr;
char *s;
char *newident = NULL;
int legalident=1;
if (parc < 3)
return need_more_params(sptr, "SVSIDENT");
/* Ignore SVSIDENT for a user that has quit */
if (!(acptr = findNUser(parv[1])))
return 0;
if (IsChannelService(acptr))
return 0;
newident = strdup(parv[2]);
if (strlen(newident) > USERLEN)
return protocol_violation(sptr, "Ident too long in SVSIDENT command");
for (s = newident; *s; s++)
{
if (!IsUserChar(*s))
{
legalident = 0;
break;
}
}
if (legalident == 0)
return protocol_violation(sptr, "Illegal characters in SVSIDENT ident");
ircd_strncpy(cli_user(acptr)->username, newident, USERLEN);
ircd_strncpy(cli_username(acptr), newident, USERLEN);
sendcmdto_serv_butone(sptr, CMD_SVSIDENT, cptr, "%s%s %s", acptr->cli_user->server->cli_yxx,
acptr->cli_yxx, newident);
return 0;
}
/** Handle a SILENCE command from a server.
* See @ref m_functions for general discussion of parameters.
*
* \a parv[1] may be one of the following:
* \li "*" to indicate a broadcast update (removing a SILENCE)
* \li A client numnick that should be specifically SILENCEd.
*
* \a parv[2] is a comma-separated list of silence updates.
*
* @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_silence(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
if (IsServer(sptr))
return protocol_violation(sptr, "Server trying to silence a user");
if (parc < 3 || EmptyString(parv[2]))
return need_more_params(sptr, "SILENCE");
/* Figure out which silences can be forwarded. */
forward_silences(sptr, parv[2], findNUser(parv[1]));
return 0;
(void)cptr;
}
/*
* ms_quit - server message handler
*
* parv[0] = sender prefix
* parv[parc - 1] = comment
*/
int ms_quit(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
assert(0 != sptr);
assert(parc > 0);
if (IsServer(sptr)) {
protocol_violation(sptr,"Server QUIT, not SQUIT?");
return 0;
}
/*
* ignore quit from servers
*/
return exit_client(cptr, sptr, sptr, parv[parc - 1]);
}
/*
* ms_squit (server)
*
* parv[0] = sender prefix
* parv[1] = server name
* parv[2] = timestamp
* parv[parc-1] = comment
*
* No longer supports wildcards from servers.
* No longer squits a server that gave us an malformed squit message.
* - Isomer 1999-12-18
*
*/
int ms_squit(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
const char* server = parv[1];
struct Client *acptr;
time_t timestamp = 0;
char *comment = 0;
if (parc < 2)
return need_more_params(sptr, "SQUIT");
comment = parv[parc-1];
if (BadPtr(parv[parc - 1]))
comment = cli_name(sptr);
acptr = FindServer(server);
if (!acptr)
acptr = FindNServer(server);
if (!acptr) {
Debug((DEBUG_NOTICE, "Ignoring SQUIT to an unknown server"));
return 0;
}
/* If they are squitting me, we reverse it */
if (IsMe(acptr))
acptr = cptr; /* Bugfix by Prefect */
if (parc > 2)
timestamp = atoi(parv[2]);
else
protocol_violation(cptr, "SQUIT with no timestamp/reason");
/* If atoi(parv[2]) == 0 we must indeed squit !
* It will be our neighbour.
*/
if ( timestamp != 0 && timestamp != cli_serv(acptr)->timestamp)
{
Debug((DEBUG_NOTICE, "Ignoring SQUIT with the wrong timestamp"));
return 0;
}
return exit_client(cptr, acptr, sptr, comment);
}
/** Handle an AWAY message from a server.
*
* \a parv has the following elements:
* \li \a parv[1] (optional) is the new away message.
*
* 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_away(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
char* away_message = parv[1];
assert(0 != cptr);
assert(0 != sptr);
/*
* servers can't set away
*/
if (IsServer(sptr))
return protocol_violation(sptr,"Server trying to set itself away");
if (user_set_away(cli_user(sptr), away_message))
sendcmdto_serv(sptr, CMD_AWAY, cptr, ":%s", away_message);
else
sendcmdto_serv(sptr, CMD_AWAY, cptr, "");
return 0;
}
/*
* ms_pong - server message handler
*
* parv[0] = sender prefix
* parv[1] = origin
* parv[2] = destination
*/
int ms_pong(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
char* origin;
char* destination;
assert(0 != cptr);
assert(0 != sptr);
assert(IsServer(cptr));
if (parc < 2 || EmptyString(parv[1])) {
return protocol_violation(sptr,"No Origin on PONG");
}
origin = parv[1];
destination = parv[2];
ClearPingSent(cptr);
ClearPingSent(sptr);
cli_lasttime(cptr) = CurrentTime;
if (parc > 5)
{
/* AsLL pong */
cli_serv(cptr)->asll_rtt = atoi(militime_float(parv[3]));
cli_serv(cptr)->asll_to = atoi(parv[4]);
cli_serv(cptr)->asll_from = atoi(militime_float(parv[5]));
cli_serv(cptr)->asll_last = CurrentTime;
return 0;
}
if (EmptyString(destination))
return 0;
if (*destination == '!')
{
/* AsLL ping reply from a non-AsLL server */
cli_serv(cptr)->asll_rtt = atoi(militime_float(destination + 1));
}
else if (0 != ircd_strcmp(destination, cli_name(&me)))
{
struct Client* acptr;
if ((acptr = FindClient(destination)))
sendcmdto_one(sptr, CMD_PONG, acptr, "%s %s", origin, destination);
}
return 0;
}
/*
* ms_clearmode - server message handler
*
* parv[0] = Send prefix
* parv[1] = Channel name
* parv[2] = Control string
*/
int
ms_clearmode(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Channel *chptr;
if (parc < 3)
return need_more_params(sptr, "CLEARMODE");
if (!IsPrivileged(sptr)) {
protocol_violation(sptr,"No privileges on source for CLEARMODE, desync?");
return send_reply(sptr, ERR_NOPRIVILEGES);
}
if (!IsChannelName(parv[1]) || IsLocalChannel(parv[1]) ||
!(chptr = FindChannel(parv[1])))
return send_reply(sptr, ERR_NOSUCHCHANNEL, parv[1]);
return do_clearmode(cptr, sptr, chptr, parv[2]);
}
/** Handle a remote user's attempt to set a channel topic.
* \a parv has the following elements:
* \li \a parv[1] is the channel name
* \li \a parv[2] is the channel creation timestamp (optional)
* \li \a parv[2] is the topic's timestamp (optional)
* \li \a parv[\a parc - 1] is the topic
*
* 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_topic(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Channel *chptr;
char *topic = 0, *name, *p = 0;
time_t ts = 0;
if (parc < 3)
return need_more_params(sptr, "TOPIC");
topic = parv[parc - 1];
for (; (name = ircd_strtok(&p, parv[1], ",")); parv[1] = 0)
{
chptr = 0;
/* Does the channel exist */
if (!IsChannelName(name) || !(chptr = FindChannel(name)))
{
send_reply(sptr,ERR_NOSUCHCHANNEL,name);
continue;
}
/* Ignore requests for topics from remote servers */
if (IsLocalChannel(name) && !MyUser(sptr))
{
protocol_violation(sptr,"Topic request");
continue;
}
/* If existing channel is older or has newer topic, ignore */
if (parc > 3 && (ts = atoi(parv[2])) && chptr->creationtime < ts)
continue;
ts = 0; /* Default to the current time if no topic_time is passed. */
if (parc > 4 && (ts = atoi(parv[3])) && chptr->topic_time > ts)
continue;
do_settopic(sptr,cptr,chptr,topic, ts);
}
return 0;
}
/*
* ms_notice - server message handler
*/
int ms_notice(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
char* name;
char* server;
ClrFlag(sptr, FLAG_TS8);
if (parc < 3) {
/*
* we can't deliver it, sending an error back is pointless
*/
return protocol_violation(sptr,"Not enough params for NOTICE");
}
name = parv[1];
/*
* channel msg?
*/
if (IsChannelPrefix(*name)) {
server_relay_channel_notice(sptr, name, parv[parc - 1]);
}
/*
* coming from another server, we have to check this here
*/
else if ('$' == *name && IsOper(sptr)) {
server_relay_masked_notice(sptr, name, parv[parc - 1]);
}
else if ((server = strchr(name, '@'))) {
/*
* XXX - can't get away with not doing everything
* relay_directed_notice has to do
*/
relay_directed_notice(sptr, name, server, parv[parc - 1]);
}
else {
server_relay_private_notice(sptr, name, parv[parc - 1]);
}
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;
}
/*
* ms_invite - server message handler
*
* parv[0] - sender prefix
* parv[1] - user to invite
* parv[2] - channel name
* parv[3] - (optional) channel timestamp
*
* - INVITE now is accepted only if who does it is chanop (this of course
* implies that channel must exist and he must be on it).
*
* - On the other side it IS processed even if channel is NOT invite only
* leaving room for other enhancements like inviting banned ppl. -- Nemesi
*
* - Invite with no parameters now lists the channels you are invited to.
* - Isomer 23 Oct 99
*
* - Invite with too-late timestamp, or with no timestamp from a bursting
* server, is silently discarded. - Entrope 19 Jan 05
*/
int ms_invite(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Client *acptr;
struct Channel *chptr;
time_t invite_ts;
if (IsServer(sptr)) {
/*
* this will blow up if we get an invite from a server
* we look for channel membership in sptr below.
*/
return protocol_violation(sptr,"Server attempting to invite");
}
if (parc < 3 || EmptyString(parv[2])) {
/*
* should have been handled upstream, ignore it.
*/
protocol_violation(sptr,"Too few arguments to invite");
return need_more_params(sptr,"INVITE");
}
if (!IsGlobalChannel(parv[2])) {
/*
* should not be sent
*/
return protocol_violation(sptr, "Invite to a non-standard channel %s",parv[2]);
}
if (!(acptr = FindUser(parv[1]))) {
send_reply(sptr, ERR_NOSUCHNICK, parv[1]);
return 0;
}
if (!(chptr = FindChannel(parv[2]))) {
/*
* allow invites to non existent channels, bleah
* avoid JOIN, INVITE, PART abuse
*/
sendcmdto_one(sptr, CMD_INVITE, acptr, "%C :%s", acptr, parv[2]);
return 0;
}
if (parc > 3) {
invite_ts = atoi(parv[3]);
if (invite_ts > chptr->creationtime)
return 0;
} else if (IsBurstOrBurstAck(cptr))
return 0;
if (!IsChannelService(sptr) && !find_channel_member(sptr, chptr)) {
send_reply(sptr, ERR_NOTONCHANNEL, chptr->chname);
return 0;
}
if (find_channel_member(acptr, chptr)) {
send_reply(sptr, ERR_USERONCHANNEL, cli_name(acptr), chptr->chname);
return 0;
}
if (is_silenced(sptr, acptr))
return 0;
if (MyConnect(acptr)) {
add_invite(acptr, chptr);
sendcmdto_one(sptr, CMD_INVITE, acptr, "%s %H", cli_name(acptr), chptr);
} else {
sendcmdto_one(sptr, CMD_INVITE, acptr, "%s %H %Tu", cli_name(acptr), chptr,
chptr->creationtime);
}
if (feature_bool(FEAT_ANNOUNCE_INVITES)) {
/* Announce to channel operators. */
sendcmdto_channel_butserv_butone(&his, get_error_numeric(RPL_ISSUEDINVITE)->str,
NULL, chptr, sptr, SKIP_NONOPS,
"%H %C %C :%C has been invited by %C",
chptr, acptr, sptr, acptr, sptr);
/* Announce to servers with channel operators. */
sendcmdto_channel_servers_butone(sptr, NULL, TOK_INVITE, chptr, acptr, SKIP_NONOPS,
"%s %H %Tu", cli_name(acptr), chptr,
chptr->creationtime);
}
return 0;
}
/* * ms_burst - server message handler * * -- by Run [email protected] december 1995 till march 1997 * * parv[0] = sender prefix * parv[1] = channel name * parv[2] = channel timestamp * The meaning of the following parv[]'s depend on their first character: * If parv[n] starts with a '+': * Net burst, additive modes * parv[n] = <mode> * parv[n+1] = <param> (optional) * parv[n+2] = <param> (optional) * If parv[n] starts with a '%', then n will be parc-1: * parv[n] = %<ban> <ban> <ban> ... * If parv[n] starts with another character: * parv[n] = <nick>[:<mode>],<nick>[:<mode>],... * where <mode> defines the mode and op-level * for nick and all following nicks until the * next <mode> field. * Digits in the <mode> field have of two meanings: * 1) if it is the first field in this BURST message * that contains digits, and/or when a 'v' is * present in the <mode>: * The absolute value of the op-level. * 2) if there are only digits in this field and * it is not the first field with digits: * An op-level increment relative to the previous * op-level. * First all modeless nicks must be emmitted, * then all combinations of modes without ops * (currently that is only 'v') followed by the same * series but then with ops (currently 'o','ov'). * * Example: * "A8 B #test 87654321 +ntkAl key secret 123 A8AAG,A8AAC:v,A8AAA:0,A8AAF:2,A8AAD,A8AAB:v1,A8AAE:1 :%ban1 ban2" * * <mode> list example: * * "xxx,sss:v,ttt,aaa:123,bbb,ccc:2,ddd,kkk:v2,lll:2,mmm" * * means * * xxx // first modeless nicks * sss +v // then opless nicks * ttt +v // no ":<mode>": everything stays the same * aaa -123 // first field with digit: absolute value * bbb -123 * ccc -125 // only digits, not first field: increment * ddd -125 * kkk -2 +v // field with a 'v': absolute value * lll -4 +v // only digits: increment * mmm -4 +v * * Anti net.ride code. * * When the channel already exist, and its TS is larger than * the TS in the BURST message, then we cancel all existing modes. * If its is smaller then the received BURST message is ignored. * If it's equal, then the received modes are just added. * * BURST is also accepted outside a netburst now because it * is sent upstream as reaction to a DESTRUCT message. For * these BURST messages it is possible that the listed channel * members are already joined. */ int ms_burst(struct Client *cptr, struct Client *sptr, int parc, char *parv[]) { struct ModeBuf modebuf, *mbuf = 0; struct Channel *chptr; time_t timestamp; struct Membership *member, *nmember; struct Ban *lp, **lp_p; unsigned int parse_flags = (MODE_PARSE_FORCE | MODE_PARSE_BURST); int param, nickpos = 0, banpos = 0; char modestr[BUFSIZE], nickstr[BUFSIZE], banstr[BUFSIZE]; if (parc < 3) return protocol_violation(sptr,"Too few parameters for BURST"); if (!(chptr = get_channel(sptr, parv[1], CGT_CREATE))) return 0; /* can't create the channel? */ timestamp = atoi(parv[2]); if (chptr->creationtime) /* 0 for new (empty) channels, i.e. when this server just restarted. */ { if (parc == 3) /* Zannel BURST? */ { /* An empty channel without +A set, will cause a BURST message with exactly 3 parameters (because all modes have been reset). If the timestamp on such channels is only a few seconds older from our own, then we ignore this burst: we do not deop our own side. Likewise, we expect the other (empty) side to copy our timestamp from our own BURST message, even though it is slightly larger. The reason for this is to allow people to join an empty non-A channel (a zannel) during a net.split, and not be deopped when the net reconnects (with another zannel). When someone joins a split zannel, their side increments the TS by one. If they cycle a few times then we still don't have a reason to deop them. Theoretically I see no reason not to accept ANY timestamp, but to be sure, we only accept timestamps that are just a few seconds off (one second for each time they cycled the channel). */ /* Don't even deop users who cycled four times during the net.break. */ if (timestamp < chptr->creationtime && chptr->creationtime <= timestamp + 4 && chptr->users != 0) /* Only do this when WE have users, so that if we do this the BURST that we sent has parc > 3 and the other side will use the test below: */ timestamp = chptr->creationtime; /* Do not deop our side. */ } else if (chptr->creationtime < timestamp && timestamp <= chptr->creationtime + 4 && chptr->users == 0) { /* If one side of the net.junction does the above timestamp = chptr->creationtime, then the other side must do this: */ chptr->creationtime = timestamp; /* Use the same TS on both sides. */ } /* In more complex cases, we might still end up with a creationtime desync of a few seconds, but that should be synced automatically rather quickly (every JOIN caries a timestamp and will sync it; modes by users do not carry timestamps and are accepted regardless). Only when nobody joins the channel on the side with the oldest timestamp before a new net.break occurs precisely inbetween the desync, an unexpected bounce might happen on reconnect. */ } if (!chptr->creationtime || chptr->creationtime > timestamp) { /* * Kick local members if channel is +i or +k and our TS was larger * than the burst TS (anti net.ride). The modes hack is here because * we have to do this before mode_parse, as chptr may go away. */ for (param = 3; param < parc; param++) { int check_modes; if (parv[param][0] != '+') continue; check_modes = netride_modes(parc - param, parv + param, chptr->mode.key); if (check_modes < 0) { if (chptr->users == 0) sub1_from_channel(chptr); return protocol_violation(sptr, "Invalid mode string in BURST"); } else if (check_modes) { /* Clear any outstanding rogue invites */ mode_invite_clear(chptr); for (member = chptr->members; member; member = nmember) { nmember = member->next_member; if (!MyUser(member->user) || IsZombie(member)) continue; /* Kick as netrider if key mismatch *or* remote channel is * +i (unless user is an oper) *or* remote channel is +r * (unless user has an account). */ if (!(check_modes & MODE_KEY) && (!(check_modes & MODE_INVITEONLY) || IsAnOper(member->user)) && (!(check_modes & MODE_REGONLY) || IsAccount(member->user))) continue; sendcmdto_serv_butone(&me, CMD_KICK, NULL, "%H %C :Net Rider", chptr, member->user); sendcmdto_channel_butserv_butone(&his, CMD_KICK, chptr, NULL, 0, "%H %C :Net Rider", chptr, member->user); make_zombie(member, member->user, &me, &me, chptr); } } break; } /* If the channel had only locals, it went away by now. */ if (!(chptr = get_channel(sptr, parv[1], CGT_CREATE))) return 0; /* can't create the channel? */ } /* turn off burst joined flag */ for (member = chptr->members; member; member = member->next_member) member->status &= ~(CHFL_BURST_JOINED|CHFL_BURST_ALREADY_OPPED|CHFL_BURST_ALREADY_VOICED); if (!chptr->creationtime) /* mark channel as created during BURST */ chptr->mode.mode |= MODE_BURSTADDED; /* new channel or an older one */ if (!chptr->creationtime || chptr->creationtime > timestamp) { chptr->creationtime = timestamp; modebuf_init(mbuf = &modebuf, &me, cptr, chptr, MODEBUF_DEST_CHANNEL | MODEBUF_DEST_NOKEY); modebuf_mode(mbuf, MODE_DEL | chptr->mode.mode); /* wipeout modes */ chptr->mode.mode &= MODE_BURSTADDED | MODE_WASDELJOINS; /* wipe out modes not represented in chptr->mode.mode */ 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'; } parse_flags |= (MODE_PARSE_SET | MODE_PARSE_WIPEOUT); /* wipeout keys */ /* mark bans for wipeout */ for (lp = chptr->banlist; lp; lp = lp->next) lp->flags |= BAN_BURST_WIPEOUT; /* clear topic set by netrider (if set) */ if (*chptr->topic) { *chptr->topic = '\0'; *chptr->topic_nick = '\0'; chptr->topic_time = 0; sendcmdto_channel_butserv_butone(&his, CMD_TOPIC, chptr, NULL, 0, "%H :%s", chptr, chptr->topic); } } else if (chptr->creationtime == timestamp) { modebuf_init(mbuf = &modebuf, &me, cptr, chptr, MODEBUF_DEST_CHANNEL | MODEBUF_DEST_NOKEY); parse_flags |= MODE_PARSE_SET; /* set new modes */ } param = 3; /* parse parameters */ while (param < parc) { switch (*parv[param]) { case '+': /* parameter introduces a mode string */ param += mode_parse(mbuf, cptr, sptr, chptr, parc - param, parv + param, parse_flags, NULL); break; case '%': /* parameter contains bans */ if (parse_flags & MODE_PARSE_SET) { char *banlist = parv[param] + 1, *p = 0, *ban, *ptr; struct Ban *newban; for (ban = ircd_strtok(&p, banlist, " "); ban; ban = ircd_strtok(&p, 0, " ")) { ban = collapse(pretty_mask(ban)); /* * Yeah, we should probably do this elsewhere, and make it better * and more general; this will hold until we get there, though. * I dislike the current add_banid API... -Kev * * I wish there were a better algo. for this than the n^2 one * shown below *sigh* */ for (lp = chptr->banlist; lp; lp = lp->next) { if (!ircd_strcmp(lp->banstr, ban)) { ban = 0; /* don't add ban */ lp->flags &= ~BAN_BURST_WIPEOUT; /* not wiping out */ break; /* new ban already existed; don't even repropagate */ } else if (!(lp->flags & BAN_BURST_WIPEOUT) && !mmatch(lp->banstr, ban)) { ban = 0; /* don't add ban unless wiping out bans */ break; /* new ban is encompassed by an existing one; drop */ } else if (!mmatch(ban, lp->banstr)) lp->flags |= BAN_OVERLAPPED; /* remove overlapping ban */ if (!lp->next) break; } if (ban) { /* add the new ban to the end of the list */ /* Build ban buffer */ if (!banpos) { banstr[banpos++] = ' '; banstr[banpos++] = ':'; banstr[banpos++] = '%'; } else banstr[banpos++] = ' '; for (ptr = ban; *ptr; ptr++) /* add ban to buffer */ banstr[banpos++] = *ptr; newban = make_ban(ban); /* create new ban */ strcpy(newban->who, "*"); newban->when = TStime(); newban->flags |= BAN_BURSTED; newban->next = 0; if (lp) lp->next = newban; /* link it in */ else chptr->banlist = newban; } } } param++; /* look at next param */ break; default: /* parameter contains clients */ { struct Client *acptr; char *nicklist = parv[param], *p = 0, *nick, *ptr; int current_mode, last_mode, base_mode; int oplevel = -1; /* Mark first field with digits: means the same as 'o' (but with level). */ int last_oplevel = 0; struct Membership* member; base_mode = CHFL_DEOPPED | CHFL_BURST_JOINED; if (chptr->mode.mode & MODE_DELJOINS) base_mode |= CHFL_DELAYED; current_mode = last_mode = base_mode; for (nick = ircd_strtok(&p, nicklist, ","); nick; nick = ircd_strtok(&p, 0, ",")) { if ((ptr = strchr(nick, ':'))) { /* new flags; deal */ *ptr++ = '\0'; if (parse_flags & MODE_PARSE_SET) { int current_mode_needs_reset; for (current_mode_needs_reset = 1; *ptr; ptr++) { if (*ptr == 'o') { /* has oper status */ /* * An 'o' is pre-oplevel protocol, so this is only for * backwards compatibility. Give them an op-level of * MAXOPLEVEL so everyone can deop them. */ oplevel = MAXOPLEVEL; if (current_mode_needs_reset) { current_mode = base_mode; current_mode_needs_reset = 0; } current_mode = (current_mode & ~(CHFL_DEOPPED | CHFL_DELAYED)) | CHFL_CHANOP; /* * Older servers may send XXYYY:ov, in which case we * do not want to use the code for 'v' below. */ if (ptr[1] == 'v') { current_mode |= CHFL_VOICE; ptr++; } } else if (*ptr == 'v') { /* has voice status */ if (current_mode_needs_reset) { current_mode = base_mode; current_mode_needs_reset = 0; } current_mode = (current_mode & ~CHFL_DELAYED) | CHFL_VOICE; oplevel = -1; /* subsequent digits are an absolute op-level value. */ } else if (IsDigit(*ptr)) { int level_increment = 0; if (oplevel == -1) { /* op-level is absolute value? */ if (current_mode_needs_reset) { current_mode = base_mode; current_mode_needs_reset = 0; } oplevel = 0; } current_mode = (current_mode & ~(CHFL_DEOPPED | CHFL_DELAYED)) | CHFL_CHANOP; do { level_increment = 10 * level_increment + *ptr++ - '0'; } while (IsDigit(*ptr)); oplevel += level_increment; } else /* I don't recognize that flag */ break; /* so stop processing */ } } } if (!(acptr = findNUser(nick)) || cli_from(acptr) != cptr) continue; /* ignore this client */ /* Build nick buffer */ nickstr[nickpos] = nickpos ? ',' : ' '; /* first char */ nickpos++; for (ptr = nick; *ptr; ptr++) /* store nick */ nickstr[nickpos++] = *ptr; if (current_mode != last_mode) { /* if mode changed... */ last_mode = current_mode; last_oplevel = oplevel; nickstr[nickpos++] = ':'; /* add a specifier */ if (current_mode & CHFL_VOICE) nickstr[nickpos++] = 'v'; if (current_mode & CHFL_CHANOP) { if (chptr->mode.apass[0]) nickpos += ircd_snprintf(0, nickstr + nickpos, sizeof(nickstr) - nickpos, "%u", oplevel); else nickstr[nickpos++] = 'o'; } } else if (current_mode & CHFL_CHANOP && oplevel != last_oplevel) { /* if just op level changed... */ nickstr[nickpos++] = ':'; /* add a specifier */ nickpos += ircd_snprintf(0, nickstr + nickpos, sizeof(nickstr) - nickpos, "%u", oplevel - last_oplevel); last_oplevel = oplevel; } if (!(member = find_member_link(chptr, acptr))) { add_user_to_channel(chptr, acptr, current_mode, oplevel); if (!(current_mode & CHFL_DELAYED)) sendcmdto_channel_butserv_butone(acptr, CMD_JOIN, chptr, NULL, 0, "%H", chptr); } else { /* The member was already joined (either by CREATE or JOIN). Remember the current mode. */ if (member->status & CHFL_CHANOP) member->status |= CHFL_BURST_ALREADY_OPPED; if (member->status & CHFL_VOICE) member->status |= CHFL_BURST_ALREADY_VOICED; /* Synchronize with the burst. */ member->status |= CHFL_BURST_JOINED | (current_mode & (CHFL_CHANOP|CHFL_VOICE)); SetOpLevel(member, oplevel); } } } param++; break; } /* switch (*parv[param]) */ } /* while (param < parc) */ nickstr[nickpos] = '\0'; banstr[banpos] = '\0'; if (parse_flags & MODE_PARSE_SET) { modebuf_extract(mbuf, modestr + 1); /* for sending BURST onward */ modestr[0] = modestr[1] ? ' ' : '\0'; } else modestr[0] = '\0'; sendcmdto_serv_butone(sptr, CMD_BURST, cptr, "%H %Tu%s%s%s", chptr, chptr->creationtime, modestr, nickstr, banstr); if (parse_flags & MODE_PARSE_WIPEOUT || banpos) mode_ban_invalidate(chptr); if (parse_flags & MODE_PARSE_SET) { /* any modes changed? */ /* first deal with channel members */ for (member = chptr->members; member; member = member->next_member) { if (member->status & CHFL_BURST_JOINED) { /* joined during burst */ if ((member->status & CHFL_CHANOP) && !(member->status & CHFL_BURST_ALREADY_OPPED)) modebuf_mode_client(mbuf, MODE_ADD | CHFL_CHANOP, member->user, OpLevel(member)); if ((member->status & CHFL_VOICE) && !(member->status & CHFL_BURST_ALREADY_VOICED)) modebuf_mode_client(mbuf, MODE_ADD | CHFL_VOICE, member->user, OpLevel(member)); } else if (parse_flags & MODE_PARSE_WIPEOUT) { /* wipeout old ops */ if (member->status & CHFL_CHANOP) modebuf_mode_client(mbuf, MODE_DEL | CHFL_CHANOP, member->user, OpLevel(member)); if (member->status & CHFL_VOICE) modebuf_mode_client(mbuf, MODE_DEL | CHFL_VOICE, member->user, OpLevel(member)); member->status = (member->status & ~(CHFL_CHANNEL_MANAGER | CHFL_CHANOP | CHFL_VOICE)) | CHFL_DEOPPED; } } /* Now deal with channel bans */ lp_p = &chptr->banlist; while (*lp_p) { lp = *lp_p; /* remove ban from channel */ if (lp->flags & (BAN_OVERLAPPED | BAN_BURST_WIPEOUT)) { char *bandup; DupString(bandup, lp->banstr); modebuf_mode_string(mbuf, MODE_DEL | MODE_BAN, bandup, 1); *lp_p = lp->next; /* clip out of list */ free_ban(lp); continue; } else if (lp->flags & BAN_BURSTED) /* add ban to channel */ modebuf_mode_string(mbuf, MODE_ADD | MODE_BAN, lp->banstr, 0); /* don't free banstr */ lp->flags &= BAN_IPMASK; /* reset the flag */ lp_p = &(*lp_p)->next; } } return mbuf ? modebuf_flush(mbuf) : 0; }
/** Handle a CREATE message from a server.
* Atomically creates a new channel and ops the creator.
*
* \a parv has the following elements:
* \li \a parv[1] Comma-separated list of channels to create.
* \li \a parv[2] Creation timestamp for the channel(s).
*
* 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_create(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
time_t chanTS; /* channel creation time */
char *p; /* strtok state */
char *name; /* channel name */
struct Channel *chptr; /* channel */
struct JoinBuf join; /* join and create buffers */
struct JoinBuf create;
struct ModeBuf mbuf; /* a mode buffer */
int badop; /* a flag */
if (IsServer(sptr))
return protocol_violation(sptr,"%s tried to CREATE a channel", cli_name(sptr));
/* sanity checks: Only accept CREATE messages from servers */
if (parc < 3 || *parv[2] == '\0')
return need_more_params(sptr,"CREATE");
chanTS = atoi(parv[2]);
/* A create that didn't appear during a burst has that servers idea of
* the current time. Use it for lag calculations.
*/
if (!IsBurstOrBurstAck(sptr) && 0 != chanTS)
cli_serv(cli_user(sptr)->server)->lag = TStime() - chanTS;
/* If this server is >1 minute fast, warn */
if (TStime() - chanTS<-60)
{
static time_t rate;
sendto_opmask_ratelimited(0, SNO_NETWORK, &rate,
"Timestamp drift from %C (%is); issuing "
"SETTIME to correct this",
cli_user(sptr)->server,
chanTS - TStime());
/* Now issue a SETTIME to resync. If we're in the wrong, our
* (RELIABLE_CLOCK) hub will bounce a SETTIME back to us.
*/
sendcmdto_prio_one(&me, CMD_SETTIME, cli_user(sptr)->server,
"%Tu %C", TStime(), cli_user(sptr)->server);
}
joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
joinbuf_init(&create, sptr, cptr, JOINBUF_TYPE_CREATE, 0, chanTS);
/* For each channel in the comma separated list: */
for (name = ircd_strtok(&p, parv[1], ","); name;
name = ircd_strtok(&p, 0, ",")) {
badop = 0;
if (IsLocalChannel(name))
continue;
if ((chptr = FindChannel(name)))
{
/* Is the remote server confused? */
if (find_member_link(chptr, sptr)) {
protocol_violation(sptr, "%s tried to CREATE a channel already joined", cli_name(sptr));
continue;
}
/* Check if we need to bounce a mode */
if (TStime() - chanTS > TS_LAG_TIME ||
(chptr->creationtime && chanTS > chptr->creationtime &&
/* Accept CREATE for zannels. This is only really necessary on a network
with servers prior to 2.10.12.02: we just accept their TS and ignore
the fact that it was a zannel. The influence of this on a network
that is completely 2.10.12.03 or higher is neglectable: Normally
a server only sends a CREATE after first sending a DESTRUCT. Thus,
by receiving a CREATE for a zannel one of three things happened:
1. The DESTRUCT was sent during a net.break; this could mean that
our zannel is at the verge of expiring too, it should have been
destructed. It is correct to copy the newer TS now, all modes
already have been reset, so it will be as if it was destructed
and immediately recreated. In order to avoid desyncs of modes,
we don't accept a CREATE for channels that have +A set.
2. The DESTRUCT passed, then someone created the channel on our
side and left it again. In this situation we have a near
simultaneous creation on two servers; the person on our side
already left within the time span of a message propagation.
The channel will therefore be less than 48 hours old and no
'protection' is necessary.
3. The source server sent the CREATE while linking,
before it got the BURST for our zannel. If this
happens, we should reset the channel back to the old
timestamp. This can be distinguished from case #1 by
checking IsBurstOrBurstAck(cli_user(sptr)->server).
*/
#if defined(UNDERNET)
!(chptr->users == 0 && !chptr->mode.apass[0]))) {
#else
!(chptr->users == 0))) {
#endif
if (!IsBurstOrBurstAck(cli_user(sptr)->server)) {
modebuf_init(&mbuf, sptr, cptr, chptr,
(MODEBUF_DEST_SERVER | /* Send mode to server */
MODEBUF_DEST_HACK2 | /* Send a HACK(2) message */
MODEBUF_DEST_BOUNCE)); /* And bounce the mode */
#if defined(UNDERNET)
modebuf_mode_client(&mbuf, MODE_ADD | MODE_CHANOP, sptr, MAXOPLEVEL + 1);
#else
modebuf_mode_client(&mbuf, MODE_ADD | MODE_CHANOP, sptr, 0);
#endif
modebuf_flush(&mbuf);
badop = 1;
} else if (chanTS > chptr->creationtime + 4) {
/* If their handling of the BURST will lead to deopping the
* user, have the user join without getting ops (if the
* server's handling of the BURST keeps their ops, the channel
* will use our timestamp).
*/
badop = 1;
}
if (badop)
joinbuf_join(&join, chptr, 0);
}
}
else /* Channel doesn't exist: create it */
chptr = get_channel(sptr, name, CGT_CREATE);
if (!badop) {
/* Set (or correct) our copy of the TS */
chptr->creationtime = chanTS;
joinbuf_join(&create, chptr, CHFL_CHANOP);
}
}
/*
* m_notice - generic message handler
*/
int m_notice(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
char* name;
char* server;
int ret = 0;
int i;
int j;
int fd = 0;
int count;
char *clean;
char* vector[MAXTARGETS];
char* temp; /* added by Vadtec 02/25/2008 */
char* parv_temp; /* added by Vadtec 02/26/2008 */
int found_g = 0; /* added by Vadtec 02/26/2008 */
int sent = 0; /* added by Vadtec 03/13/2008 */
struct Client* acptr; /* added by Vadtec 02/26/2008 */
struct Channel* chptr; /* added by Vadtec 02/27/2008 */
int isdcc = 0;
assert(0 != cptr);
assert(cptr == sptr);
ClrFlag(sptr, FLAG_TS8);
if (parc < 2 || EmptyString(parv[1]))
return send_reply(sptr, ERR_NORECIPIENT, MSG_NOTICE);
if (parc < 3 || EmptyString(parv[parc - 1]))
return send_reply(sptr, ERR_NOTEXTTOSEND);
if (parv[1][0] == '@' && IsChannelPrefix(parv[1][1])) {
parv[1]++; /* Get rid of '@' */
return m_wallchops(cptr, sptr, parc, parv);
}
count = unique_name_vector(parv[1], ',', vector, MAXTARGETS);
/* Check here to make sure that the client is ours so we dont respond to NOTICES from other server's users. - Vadtec 02/25/2008 */
/* Also, check to make sure that the notice is actually destined for the *server* and not another user. That way we don't process
some user saying "what version do you use" to another user via notice. - Vadtec 03/13/2008 */
if (feature_bool(FEAT_CTCP_VERSIONING) && MyConnect(sptr) && !strcmp(parv[1], cli_name(&me))) {
/*
Added by Vadtec 02/25/2008.
This is so that we can do version checking (and banning) of connecting clients.
Rules: Only one really. CTCP VERSION is not part of the RFC and therefore clients are not required to respond to
a request for their version.
NOTE: If we are lucky enough to have _GNU_SOURCE, we will use it over the standard strstr because its case insensetive.
This should help against clients that like to send lower case CTCPs from slipping through as easily with only one
function call.
*/
for (fd = HighestFd; fd >= 0 && !sent; --fd) { /* Added the "sent" check here so that if we have already sent the notice
we don't needlessly loop through *all* the users - Vadtec 03/13/2008 */
if ((acptr = LocalClientArray[fd])) {
if (!cli_user(acptr))
continue;
#ifdef _GNU_SOURCE
if ((temp = strcasestr(parv[2], "\x01VERSION"))) { /* added \x01 to the string so that it will *only* respond to CTCP version
replies. Seems redundant, but we dont want the users doing
/notice <server> version (and getting away with it) - Vadtec 03/13/2008 */
temp = strchrnul(parv[2], ' '); /* Moved this here to take advantage of strchrnul - added by Vadtec 03/13/2008 */
#else
if ((temp = strstr(parv[2], "\x01VERSION")) || (temp = strstr(parv[2], "\x01version"))) { /* See above comment about \x01 - Vadtec */
temp = strchr(parv[2], ' '); /* Moved this here to take advantage of strchrnul - added by Vadtec 03/13/2008 */
if (temp == 0)
temp = parv[2] + strlen(parv[2]); /* This does the same thing as strchrnul - Vadtec */
#endif
parv_temp = parv[2];
j = 0;
while (j <= (temp - parv[2])) { parv_temp++; j++; }
clean = normalizeBuffer(parv_temp);
doCleanBuffer((char *) clean);
ircd_strncpy(cli_version(sptr), normalizeBuffer(clean), VERSIONLEN);
sendcmdto_serv_butone(&me, CMD_MARK, cptr, "%s %s :%s", cli_name(sptr), MARK_CVERSION, cli_version(sptr));
/* Moved here to solve duplicate MARK's if any of the CTCP_* conditions were false 05/13/2009 */
sent = 1;
if (feature_bool(FEAT_CTCP_VERSIONING_CHAN)) {
sprintf(temp, "%s has version \002%s\002", cli_name(sptr), cli_version(sptr));
/* Announce to channel. */
if ((chptr = FindChannel(feature_str(FEAT_CTCP_VERSIONING_CHANNAME)))) {
if (feature_bool(FEAT_CTCP_VERSIONING_USEMSG))
sendcmdto_channel_butone(&me, CMD_PRIVATE, chptr, cptr, SKIP_DEAF | SKIP_BURST, '\0', "%H :%s", chptr, temp);
else
sendcmdto_channel_butone(&me, CMD_NOTICE, chptr, cptr, SKIP_DEAF | SKIP_BURST, '\0', "%H :%s", chptr, temp);
/* Removed sent=1 from here because it caused the MARK above to be sent
more then once if any of the conditions leading here are false 05/13/2009 */
}
}
if (feature_bool(FEAT_CTCP_VERSIONING_KILL)) {
if ((found_g = find_kill(acptr))) {
sendto_opmask_butone(0, found_g == -2 ? SNO_GLINE : SNO_OPERKILL,
found_g == -2 ? "G-line active for %s%s" :
"K-line active for %s%s",
IsUnknown(sptr) ? "Unregistered Client ":"",
get_client_name(sptr, SHOW_IP));
return exit_client_msg(cptr, acptr, &me, "Banned Client: %s", cli_version(acptr));
}
}
else
return 0;
}
}
}
}
for (i = 0; i < count; ++i) {
name = vector[i];
if (IsChannelPrefix(*name)) {
ret = find_fline(cptr, sptr, parv[parc-1], WFFLAG_CHANNOTICE, name);
if (ret != 0) {
if (ret == 2)
return CPTR_KILLED;
else
return 0;
}
} else {
#ifdef _GNU_SOURCE
if ((temp = strcasestr(parv[2], "\001DCC"))) {
temp = strchrnul(parv[2], ' ');
#else
if ((temp = strstr(parv[2], "\001DCC")) || (temp = strstr(parv[2], "\001dcc"))) {
temp = strchr(parv[2], ' ');
#endif
isdcc = 1;
ret = find_fline(cptr, sptr, parv[parc-1], WFFLAG_DCC, name);
if (ret != 0) {
if (ret == 2)
return CPTR_KILLED;
else
return 0;
}
}
if (!isdcc) {
ret = find_fline(cptr, sptr, parv[parc-1], WFFLAG_NOTICE, name);
if (ret != 0) {
if (ret == 2)
return CPTR_KILLED;
else
return 0;
}
}
}
}
i = 0;
for (i = 0; i < count; ++i) {
name = vector[i];
/*
* channel msg?
*/
if (IsChannelPrefix(*name)) {
relay_channel_notice(sptr, name, parv[parc - 1], count);
}
/*
* we have to check for the '@' at least once no matter what we do
* handle it first so we don't have to do it twice
*/
else if ((server = strchr(name, '@')))
relay_directed_notice(sptr, name, server, parv[parc - 1]);
else
relay_private_notice(sptr, name, parv[parc - 1]);
}
return 0;
}
/*
* ms_notice - server message handler
*/
int ms_notice(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
char* name;
char* server;
ClrFlag(sptr, FLAG_TS8);
if (parc < 3) {
/*
* we can't deliver it, sending an error back is pointless
*/
return protocol_violation(sptr,"Not enough params for NOTICE");
}
name = parv[1];
/*
* channel msg?
*/
if (IsChannelPrefix(*name)) {
server_relay_channel_notice(sptr, name, parv[parc - 1]);
}
/*
* coming from another server, we have to check this here
*/
else if ('$' == *name && IsOper(sptr)) {
server_relay_masked_notice(sptr, name, parv[parc - 1]);
}
else if ((server = strchr(name, '@'))) {
/*
* XXX - can't get away with not doing everything
* relay_directed_notice has to do
*/
relay_directed_notice(sptr, name, server, parv[parc - 1]);
}
else {
server_relay_private_notice(sptr, name, parv[parc - 1]);
}
return 0;
}
/*
* mo_notice - oper message handler
*/
int mo_notice(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
char* name;
char* server;
int i;
int count;
char* vector[MAXTARGETS];
assert(0 != cptr);
assert(cptr == sptr);
ClrFlag(sptr, FLAG_TS8);
if (parc < 2 || EmptyString(parv[1]))
return send_reply(sptr, ERR_NORECIPIENT, MSG_NOTICE);
if (parc < 3 || EmptyString(parv[parc - 1]))
return send_reply(sptr, ERR_NOTEXTTOSEND);
if (parv[1][0] == '@' && IsChannelPrefix(parv[1][1])) {
parv[1]++; /* Get rid of '@' */
return m_wallchops(cptr, sptr, parc, parv);
}
count = unique_name_vector(parv[1], ',', vector, MAXTARGETS);
for (i = 0; i < count; ++i) {
name = vector[i];
/*
* channel msg?
*/
if (IsChannelPrefix(*name))
relay_channel_notice(sptr, name, parv[parc - 1], count);
else if (*name == '$')
relay_masked_notice(sptr, name, parv[parc - 1]);
else if ((server = strchr(name, '@')))
relay_directed_notice(sptr, name, server, parv[parc - 1]);
else
relay_private_notice(sptr, name, parv[parc - 1]);
}
return 0;
}
/* * ms_burst - server message handler * * -- by Run [email protected] december 1995 till march 1997 * * parv[0] = sender prefix * parv[1] = channel name * parv[2] = channel timestamp * The meaning of the following parv[]'s depend on their first character: * If parv[n] starts with a '+': * Net burst, additive modes * parv[n] = <mode> * parv[n+1] = <param> (optional) * parv[n+2] = <param> (optional) * If parv[n] starts with a '%', then n will be parc-1: * parv[n] = %<ban> <ban> <ban> ... * If parv[n] starts with another character: * parv[n] = <nick>[:<mode>],<nick>[:<mode>],... * where <mode> is the channel mode (ov) of nick and all following nicks. * * Example: * "S BURST #channel 87654321 +ntkl key 123 AAA,AAB:o,BAA,BAB:ov :%ban1 ban2" * * Anti net.ride code. * * When the channel already exist, and its TS is larger then * the TS in the BURST message, then we cancel all existing modes. * If its is smaller then the received BURST message is ignored. * If it's equal, then the received modes are just added. */ int ms_burst(struct Client *cptr, struct Client *sptr, int parc, char *parv[]) { struct ModeBuf modebuf, *mbuf = 0; struct Channel *chptr; time_t timestamp; struct Membership *member, *nmember; struct SLink *lp, **lp_p; unsigned int parse_flags = (MODE_PARSE_FORCE | MODE_PARSE_BURST); int param, nickpos = 0, banpos = 0; char modestr[BUFSIZE], nickstr[BUFSIZE], banstr[BUFSIZE]; if (parc < 3) return protocol_violation(sptr,"Too few parameters for BURST"); if (!IsBurst(sptr)) /* don't allow BURST outside of burst */ return exit_client_msg(cptr, cptr, &me, "HACK: BURST message outside " "net.burst from %s", cli_name(sptr)); if (!(chptr = get_channel(sptr, parv[1], CGT_CREATE))) return 0; /* can't create the channel? */ timestamp = atoi(parv[2]); if (!chptr->creationtime || chptr->creationtime > timestamp) { /* * Kick local members if channel is +i or +k and our TS was larger * than the burst TS (anti net.ride). The modes hack is here because * we have to do this before mode_parse, as chptr may go away. */ for (param = 3; param < parc; param++) { if (parv[param][0] != '+') continue; if (strchr(parv[param], 'i') || strchr(parv[param], 'k')) { /* Clear any outstanding rogue invites */ mode_invite_clear(chptr); for (member = chptr->members; member; member = nmember) { nmember=member->next_member; if (!MyUser(member->user) || IsZombie(member)) continue; sendcmdto_serv_butone(&me, CMD_KICK, NULL, "%H %C :Net Rider", chptr, member->user); sendcmdto_channel_butserv_butone(&me, CMD_KICK, chptr, NULL, "%H %C :Net Rider", chptr, member->user); make_zombie(member, member->user, &me, &me, chptr); } } break; } /* If the channel had only locals, it went away by now. */ if (!(chptr = get_channel(sptr, parv[1], CGT_CREATE))) return 0; /* can't create the channel? */ } /* turn off burst joined flag */ for (member = chptr->members; member; member = member->next_member) member->status &= ~CHFL_BURST_JOINED; if (!chptr->creationtime) /* mark channel as created during BURST */ chptr->mode.mode |= MODE_BURSTADDED; /* new channel or an older one */ if (!chptr->creationtime || chptr->creationtime > timestamp) { chptr->creationtime = timestamp; modebuf_init(mbuf = &modebuf, &me, cptr, chptr, MODEBUF_DEST_CHANNEL | MODEBUF_DEST_NOKEY); modebuf_mode(mbuf, MODE_DEL | chptr->mode.mode); /* wipeout modes */ chptr->mode.mode &= ~(MODE_ADD | MODE_DEL | MODE_PRIVATE | MODE_SECRET | MODE_MODERATED | MODE_TOPICLIMIT | MODE_INVITEONLY | MODE_NOPRIVMSGS); parse_flags |= (MODE_PARSE_SET | MODE_PARSE_WIPEOUT); /* wipeout keys */ /* mark bans for wipeout */ for (lp = chptr->banlist; lp; lp = lp->next) lp->flags |= CHFL_BURST_BAN_WIPEOUT; /* clear topic set by netrider (if set) */ if (*chptr->topic) { *chptr->topic = '\0'; *chptr->topic_nick = '\0'; chptr->topic_time = 0; sendcmdto_channel_butserv_butone(&me, CMD_TOPIC, chptr, NULL, "%H :%s", chptr, chptr->topic); } } else if (chptr->creationtime == timestamp) { modebuf_init(mbuf = &modebuf, &me, cptr, chptr, MODEBUF_DEST_CHANNEL | MODEBUF_DEST_NOKEY); parse_flags |= MODE_PARSE_SET; /* set new modes */ } param = 3; /* parse parameters */ while (param < parc) { switch (*parv[param]) { case '+': /* parameter introduces a mode string */ param += mode_parse(mbuf, cptr, sptr, chptr, parc - param, parv + param, parse_flags); break; case '%': /* parameter contains bans */ if (parse_flags & MODE_PARSE_SET) { char *banlist = parv[param] + 1, *p = 0, *ban, *ptr; struct SLink *newban; for (ban = ircd_strtok(&p, banlist, " "); ban; ban = ircd_strtok(&p, 0, " ")) { ban = collapse(pretty_mask(ban)); /* * Yeah, we should probably do this elsewhere, and make it better * and more general; this will hold until we get there, though. * I dislike the current add_banid API... -Kev * * I wish there were a better algo. for this than the n^2 one * shown below *sigh* */ for (lp = chptr->banlist; lp; lp = lp->next) { if (!ircd_strcmp(lp->value.ban.banstr, ban)) { ban = 0; /* don't add ban */ lp->flags &= ~CHFL_BURST_BAN_WIPEOUT; /* not wiping out */ break; /* new ban already existed; don't even repropagate */ } else if (!(lp->flags & CHFL_BURST_BAN_WIPEOUT) && !mmatch(lp->value.ban.banstr, ban)) { ban = 0; /* don't add ban unless wiping out bans */ break; /* new ban is encompassed by an existing one; drop */ } else if (!mmatch(ban, lp->value.ban.banstr)) lp->flags |= CHFL_BAN_OVERLAPPED; /* remove overlapping ban */ if (!lp->next) break; } if (ban) { /* add the new ban to the end of the list */ /* Build ban buffer */ if (!banpos) { banstr[banpos++] = ' '; banstr[banpos++] = ':'; banstr[banpos++] = '%'; } else banstr[banpos++] = ' '; for (ptr = ban; *ptr; ptr++) /* add ban to buffer */ banstr[banpos++] = *ptr; newban = make_link(); /* create new ban */ DupString(newban->value.ban.banstr, ban); DupString(newban->value.ban.who, cli_name(feature_bool(FEAT_HIS_BANWHO) ? &me : sptr)); newban->value.ban.when = TStime(); newban->flags = CHFL_BAN | CHFL_BURST_BAN; /* set flags */ if ((ptr = strrchr(ban, '@')) && check_if_ipmask(ptr + 1)) newban->flags |= CHFL_BAN_IPMASK; newban->next = 0; if (lp) lp->next = newban; /* link it in */ else chptr->banlist = newban; } } } param++; /* look at next param */ break; default: /* parameter contains clients */ { struct Client *acptr; char *nicklist = parv[param], *p = 0, *nick, *ptr; int default_mode = CHFL_DEOPPED | CHFL_BURST_JOINED; int last_mode = CHFL_DEOPPED | CHFL_BURST_JOINED; for (nick = ircd_strtok(&p, nicklist, ","); nick; nick = ircd_strtok(&p, 0, ",")) { if ((ptr = strchr(nick, ':'))) { /* new flags; deal */ *ptr++ = '\0'; if (parse_flags & MODE_PARSE_SET) { for (default_mode = CHFL_DEOPPED | CHFL_BURST_JOINED; *ptr; ptr++) { if (*ptr == 'o') /* has oper status */ default_mode = (default_mode & ~CHFL_DEOPPED) | CHFL_CHANOP; else if (*ptr == 'v') /* has voice status */ default_mode |= CHFL_VOICE; else /* I don't recognize that flag */ break; /* so stop processing */ } } } if (!(acptr = findNUser(nick)) || cli_from(acptr) != cptr) continue; /* ignore this client */ /* Build nick buffer */ nickstr[nickpos] = nickpos ? ',' : ' '; /* first char */ nickpos++; for (ptr = nick; *ptr; ptr++) /* store nick */ nickstr[nickpos++] = *ptr; if (default_mode != last_mode) { /* if mode changed... */ last_mode = default_mode; nickstr[nickpos++] = ':'; /* add a specifier */ if (default_mode & CHFL_CHANOP) nickstr[nickpos++] = 'o'; if (default_mode & CHFL_VOICE) nickstr[nickpos++] = 'v'; } add_user_to_channel(chptr, acptr, default_mode); sendcmdto_channel_butserv_butone(acptr, CMD_JOIN, chptr, NULL, "%H", chptr); } } param++; break; } /* switch (*parv[param]) { */ } /* while (param < parc) { */ nickstr[nickpos] = '\0'; banstr[banpos] = '\0'; if (parse_flags & MODE_PARSE_SET) { modebuf_extract(mbuf, modestr + 1); /* for sending BURST onward */ modestr[0] = modestr[1] ? ' ' : '\0'; } else modestr[0] = '\0'; sendcmdto_serv_butone(sptr, CMD_BURST, cptr, "%H %Tu%s%s%s", chptr, chptr->creationtime, modestr, nickstr, banstr); if (parse_flags & MODE_PARSE_WIPEOUT || banpos) mode_ban_invalidate(chptr); if (parse_flags & MODE_PARSE_SET) { /* any modes changed? */ /* first deal with channel members */ for (member = chptr->members; member; member = member->next_member) { if (member->status & CHFL_BURST_JOINED) { /* joined during burst */ if (member->status & CHFL_CHANOP) modebuf_mode_client(mbuf, MODE_ADD | CHFL_CHANOP, member->user); if (member->status & CHFL_VOICE) modebuf_mode_client(mbuf, MODE_ADD | CHFL_VOICE, member->user); } else if (parse_flags & MODE_PARSE_WIPEOUT) { /* wipeout old ops */ if (member->status & CHFL_CHANOP) modebuf_mode_client(mbuf, MODE_DEL | CHFL_CHANOP, member->user); if (member->status & CHFL_VOICE) modebuf_mode_client(mbuf, MODE_DEL | CHFL_VOICE, member->user); member->status = ((member->status & ~(CHFL_CHANOP | CHFL_VOICE)) | CHFL_DEOPPED); } } /* Now deal with channel bans */ lp_p = &chptr->banlist; while (*lp_p) { lp = *lp_p; /* remove ban from channel */ if (lp->flags & (CHFL_BAN_OVERLAPPED | CHFL_BURST_BAN_WIPEOUT)) { modebuf_mode_string(mbuf, MODE_DEL | MODE_BAN, lp->value.ban.banstr, 1); /* let it free banstr */ *lp_p = lp->next; /* clip out of list */ MyFree(lp->value.ban.who); /* free who */ free_link(lp); /* free ban */ continue; } else if (lp->flags & CHFL_BURST_BAN) /* add ban to channel */ modebuf_mode_string(mbuf, MODE_ADD | MODE_BAN, lp->value.ban.banstr, 0); /* don't free banstr */ lp->flags &= (CHFL_BAN | CHFL_BAN_IPMASK); /* reset the flag */ lp_p = &(*lp_p)->next; } } return mbuf ? modebuf_flush(mbuf) : 0; }
/*
* ms_mark - server message handler
*/
int ms_mark(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Client* acptr;
if (!IsServer(sptr))
return protocol_violation(sptr, "MARK from non-server %s", cli_name(sptr));
if (!strcmp(parv[2], MARK_WEBIRC)) {
if(parc < 4)
return protocol_violation(sptr, "MARK webirc received too few parameters (%u)", parc);
if ((acptr = FindUser(parv[1]))) {
ircd_strncpy(cli_webirc(acptr), parv[3], BUFSIZE);
sendcmdto_serv_butone(sptr, CMD_MARK, cptr, "%s %s :%s", cli_name(acptr), MARK_WEBIRC, parv[3]);
}
} else if (!strcmp(parv[2], MARK_GEOIP)) {
if(parc < 5)
return protocol_violation(sptr, "MARK geoip received too few parameters (%u)", parc);
if ((acptr = FindUser(parv[1]))) {
geoip_apply_mark(acptr, parv[3], parv[4], (parc > 5 ? parv[5] : NULL));
if (parc > 5)
sendcmdto_serv_butone(sptr, CMD_MARK, cptr, "%s %s %s %s :%s", cli_name(acptr), MARK_GEOIP, parv[3], parv[4], parv[5]);
else
sendcmdto_serv_butone(sptr, CMD_MARK, cptr, "%s %s %s %s", cli_name(acptr), MARK_GEOIP, parv[3], parv[4]);
}
} else if (!strcmp(parv[2], MARK_CVERSION)) {
if(parc < 4)
return protocol_violation(sptr, "MARK client version received too few parameters (%u)", parc);
if ((acptr = FindUser(parv[1]))) {
ircd_strncpy(cli_version(acptr), parv[3], VERSIONLEN);
sendcmdto_serv_butone(sptr, CMD_MARK, cptr, "%s %s :%s", cli_name(acptr), MARK_CVERSION, parv[3]);
}
} else if (!strcmp(parv[2], MARK_SSLCLIFP)) {
if(parc < 4)
return protocol_violation(sptr, "MARK SSL client certificate fingerprint received too few parameters (%u)", parc);
if ((acptr = FindUser(parv[1]))) {
ircd_strncpy(cli_sslclifp(acptr), parv[3], BUFSIZE);
sendcmdto_serv_butone(sptr, CMD_MARK, cptr, "%s %s :%s", cli_name(acptr), MARK_SSLCLIFP, parv[3]);
}
} else if (!strcmp(parv[2], MARK_KILL)) {
if(parc < 4)
return protocol_violation(sptr, "MARK kill received too few parameters (%u)", parc);
if ((acptr = FindUser(parv[1]))) {
ircd_strncpy(cli_killmark(acptr), parv[3], BUFSIZE);
sendcmdto_serv_butone(sptr, CMD_MARK, cptr, "%s %s :%s", cli_name(acptr), MARK_KILL, parv[3]);
}
} else if (!strcmp(parv[2], MARK_MARK) || !strcmp(parv[2], MARK_DNSBL_DATA)) {
if(parc < 4)
return protocol_violation(sptr, "MARK MARK (tag) received too few parameters (%u)", parc);
if ((acptr = FindUser(parv[1]))) {
add_mark(acptr, parv[3]);
SetMarked(acptr);
sendcmdto_serv_butone(sptr, CMD_MARK, cptr, "%s %s :%s", cli_name(acptr), MARK_MARK, parv[3]);
}
}
return 0;
}
/*
* ms_settime - server message handler
*
* parv[0] = sender prefix
* parv[1] = new time
* parv[2] = server name (Only used when sptr is an Oper).
*/
int ms_settime(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
time_t t;
long dt;
static char tbuf[11];
struct DLink *lp;
if (parc < 2) /* verify argument count */
return need_more_params(sptr, "SETTIME");
t = atoi(parv[1]); /* convert time and compute delta */
dt = TStime() - t;
/* verify value */
if (t < OLDEST_TS || dt < -9000000)
{
if (IsServer(sptr)) /* protocol violation if it's from a server */
protocol_violation(sptr, "SETTIME: Bad value (%Tu, delta %ld)", t, dt);
else
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :SETTIME: Bad value (%Tu, "
"delta %ld)", sptr, t, dt);
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :SETTIME: Bad value", sptr);
return 0;
}
/* reset time... */
if (feature_bool(FEAT_RELIABLE_CLOCK))
{
ircd_snprintf(0, tbuf, sizeof(tbuf), "%Tu", TStime());
parv[1] = tbuf;
}
if (BadPtr(parv[2])) /* spam the network */
{
for (lp = cli_serv(&me)->down; lp; lp = lp->next)
if (cptr != lp->value.cptr)
sendcmdto_prio_one(sptr, CMD_SETTIME, lp->value.cptr, "%s", parv[1]);
}
else
{
if (hunt_server_prio_cmd(sptr, CMD_SETTIME, cptr, 1, "%s %C", 2, parc,
parv) != HUNTED_ISME)
{
/* If the destination was *not* me, but I'm RELIABLE_CLOCK and the
* delta is more than 30 seconds off, bounce back a corrected
* SETTIME
*/
if (feature_bool(FEAT_RELIABLE_CLOCK) && (dt > 30 || dt < -30))
sendcmdto_prio_one(&me, CMD_SETTIME, cptr, "%s %C", parv[1], cptr);
return 0;
}
}
if (feature_bool(FEAT_RELIABLE_CLOCK))
{
/* don't apply settime--reliable */
if ((dt > 600) || (dt < -600))
sendcmdto_serv_butone(&me, CMD_DESYNCH, 0, ":Bad SETTIME from %s: %Tu "
"(delta %ld)", cli_name(sptr), t, dt);
/* Let user know we're ignoring him */
if (IsUser(sptr))
{
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :clock is not set %ld "
"seconds %s : RELIABLE_CLOCK is defined", sptr,
(dt < 0) ? -dt : dt, (dt < 0) ? "forwards" : "backwards");
}
}
else /* tell opers about time change */
{
sendto_opmask_butone(0, SNO_OLDSNO, "SETTIME from %s, clock is set %ld "
"seconds %s", cli_name(sptr), (dt < 0) ? -dt : dt,
(dt < 0) ? "forwards" : "backwards");
/* Apply time change... */
TSoffset -= dt;
/* Let the issuing user know what we did... */
if (IsUser(sptr))
{
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :clock is set %ld seconds %s",
sptr, (dt < 0) ? -dt : dt,
(dt < 0) ? "forwards" : "backwards");
}
}
return 0;
}
/** Parse a line of data from a server.
* @param[in] cptr Client that sent the data.
* @param[in] buffer Start of input line.
* @param[in] bufend End of input line.
* @return 0 on success, -1 on parse error, or CPTR_KILLED if message
* handler returns it.
*/
int parse_server(struct Client *cptr, char *buffer, char *bufend)
{
struct Client* from = cptr;
char* ch = buffer;
char* s;
int len;
int i;
int numeric = 0;
int paramcount;
struct Message* mptr;
Debug((DEBUG_DEBUG, "Server Parsing: %s", buffer));
if (IsDead(cptr))
return 0;
para[0] = cli_name(from);
/*
* A server ALWAYS sends a prefix. When it starts with a ':' it's the
* protocol 9 prefix: a nick or a server name. Otherwise it's a numeric
* nick or server
*/
if (*ch == ':')
{
/* Let para[0] point to the name of the sender */
para[0] = ch + 1;
if (!(ch = strchr(ch, ' ')))
return -1;
*ch++ = '\0';
/* And let `from' point to its client structure,
opps.. a server is _also_ a client --Nem */
from = FindClient(para[0]);
/*
* If the client corresponding to the
* prefix is not found. We must ignore it,
* it is simply a lagged message traveling
* upstream a SQUIT that removed the client
* --Run
*/
if (from == NULL)
{
Debug((DEBUG_NOTICE, "Unknown prefix (%s)(%s) from (%s)",
para[0], buffer, cli_name(cptr)));
++ServerStats->is_unpf;
while (*ch == ' ')
ch++;
/*
* However, the only thing that MUST be
* allowed to travel upstream against an
* squit, is an SQUIT itself (the timestamp
* protects us from being used wrong)
*/
if (ch[1] == 'Q')
{
para[0] = cli_name(cptr);
from = cptr;
}
else
return 0;
}
else if (cli_from(from) != cptr)
{
++ServerStats->is_wrdi;
Debug((DEBUG_NOTICE, "Fake direction: Message (%s) coming from (%s)",
buffer, cli_name(cptr)));
return 0;
}
}
else
{
char numeric_prefix[6];
int i;
for (i = 0; i < 5; ++i)
{
if ('\0' == ch[i] || ' ' == (numeric_prefix[i] = ch[i]))
{
break;
}
}
numeric_prefix[i] = '\0';
/*
* We got a numeric nick as prefix
* 1 or 2 character prefixes are from servers
* 3 or 5 chars are from clients
*/
if (0 == i)
{
protocol_violation(cptr,"Missing Prefix");
from = cptr;
}
else if (' ' == ch[1] || ' ' == ch[2])
from = FindNServer(numeric_prefix);
else
from = findNUser(numeric_prefix);
do
{
++ch;
}
while (*ch != ' ' && *ch);
/*
* If the client corresponding to the
* prefix is not found. We must ignore it,
* it is simply a lagged message traveling
* upstream a SQUIT that removed the client
* --Run
* There turned out to be other reasons that
* a prefix is unknown, needing an upstream
* KILL. Also, next to an SQUIT we better
* allow a KILL to pass too.
* --Run
*/
if (from == NULL)
{
ServerStats->is_unpf++;
while (*ch == ' ')
ch++;
if (*ch == 'N' && (ch[1] == ' ' || ch[1] == 'I'))
/* Only sent a KILL for a nick change */
{
struct Client *server;
/* Kill the unknown numeric prefix upstream if
* it's server still exists: */
if ((server = FindNServer(numeric_prefix)) && cli_from(server) == cptr)
sendcmdto_one(&me, CMD_KILL, cptr, "%s :%s (Unknown numeric nick)",
numeric_prefix, cli_name(&me));
}
/*
* Things that must be allowed to travel
* upstream against an squit:
*/
if (ch[1] == 'Q' || (*ch == 'D' && ch[1] == ' ') ||
(*ch == 'K' && ch[2] == 'L'))
from = cptr;
else
return 0;
}
/* Let para[0] point to the name of the sender */
para[0] = cli_name(from);
if (cli_from(from) != cptr)
{
ServerStats->is_wrdi++;
Debug((DEBUG_NOTICE, "Fake direction: Message (%s) coming from (%s)",
buffer, cli_name(cptr)));
return 0;
}
}
while (*ch == ' ')
ch++;
if (*ch == '\0')
{
ServerStats->is_empt++;
Debug((DEBUG_NOTICE, "Empty message from host %s:%s",
cli_name(cptr), cli_name(from)));
return (-1);
}
/*
* Extract the command code from the packet. Point s to the end
* of the command code and calculate the length using pointer
* arithmetic. Note: only need length for numerics and *all*
* numerics must have parameters and thus a space after the command
* code. -avalon
*/
s = strchr(ch, ' '); /* s -> End of the command code */
len = (s) ? (s - ch) : 0;
if (len == 3 && IsDigit(*ch))
{
numeric = (*ch - '0') * 100 + (*(ch + 1) - '0') * 10 + (*(ch + 2) - '0');
paramcount = 2; /* destination, and the rest of it */
ServerStats->is_num++;
mptr = NULL; /* Init. to avoid stupid compiler warning :/ */
}
else
{
if (s)
*s++ = '\0';
/* Version Receive Send
* 2.9 Long Long
* 2.10.0 Tkn/Long Long
* 2.10.10 Tkn/Long Tkn
* 2.10.20 Tkn Tkn
*
* Clients/unreg servers always receive/
* send long commands -record
*
* And for the record, this trie parser really does not care. - Dianora
*/
mptr = msg_tree_parse(ch, &tok_tree);
if (mptr == NULL)
{
mptr = msg_tree_parse(ch, &msg_tree);
}
if (mptr == NULL)
{
/*
* Note: Give error message *only* to recognized
* persons. It's a nightmare situation to have
* two programs sending "Unknown command"'s or
* equivalent to each other at full blast....
* If it has got to person state, it at least
* seems to be well behaving. Perhaps this message
* should never be generated, though... --msa
* Hm, when is the buffer empty -- if a command
* code has been found ?? -Armin
*/
#ifdef DEBUGMODE
if (buffer[0] != '\0')
{
Debug((DEBUG_ERROR, "Unknown (%s) from %s",
ch, get_client_name(cptr, HIDE_IP)));
}
#endif
ServerStats->is_unco++;
return (-1);
}
paramcount = mptr->parameters;
i = bufend - ((s) ? s : ch);
mptr->bytes += i;
}
/*
* Must the following loop really be so devious? On
* surface it splits the message to parameters from
* blank spaces. But, if paramcount has been reached,
* the rest of the message goes into this last parameter
* (about same effect as ":" has...) --msa
*/
/* Note initially true: s==NULL || *(s-1) == '\0' !! */
i = 0;
if (s)
{
if (paramcount > MAXPARA)
paramcount = MAXPARA;
for (;;)
{
/*
* Never "FRANCE " again!! ;-) Clean
* out *all* blanks.. --msa
*/
while (*s == ' ')
*s++ = '\0';
if (*s == '\0')
break;
if (*s == ':')
{
/*
* The rest is single parameter--can
* include blanks also.
*/
if (numeric)
para[++i] = s; /* preserve the colon to make do_numeric happy */
else
para[++i] = s + 1;
break;
}
para[++i] = s;
if (i >= paramcount)
break;
for (; *s != ' ' && *s; s++);
}
}
para[++i] = NULL;
if (numeric)
return (do_numeric(numeric, (*buffer != ':'), cptr, from, i, para));
mptr->count++;
return (*mptr->handlers[cli_handler(cptr)]) (cptr, from, i, para);
}
/** Handle a CONNECT message from a server.
*
* \a parv has the following elements:
* \li \a parv[1] is the server that should initiate the connection
* \li \a parv[2] is the port number to connect on (zero for the default)
* \li \a parv[3] is the server to connect to
*
* 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_connect(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
unsigned short port;
unsigned short tmpport;
const char* rule;
struct ConfItem* aconf;
struct Client* acptr;
struct Jupe* ajupe;
assert(0 != cptr);
assert(0 != sptr);
if (!IsPrivileged(sptr))
return send_reply(sptr, ERR_NOPRIVILEGES);
if (parc < 4) {
/*
* this is coming from a server which should have already
* checked it's args, if we don't have parc == 4, something
* isn't right.
*/
protocol_violation(sptr, "Too few parameters to connect");
return need_more_params(sptr, "CONNECT");
}
if (hunt_server_cmd(sptr, CMD_CONNECT, cptr, 1, "%s %s :%C", 3, parc, parv)
!= HUNTED_ISME)
return 0;
/*
* need to find the conf entry first so we can use the server name from
* the conf entry instead of parv[1] to find out if the server is already
* present below. --Bleep
*/
if (0 == (aconf = conf_find_server(parv[1]))) {
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Host %s not listed "
"in ircd.conf", sptr, parv[1]);
return 0;
}
/*
* use aconf->name to look up the server
*/
if ((acptr = FindServer(aconf->name))) {
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Server %s already "
"exists from %s", sptr, parv[1], cli_name(cli_from(acptr)));
return 0;
}
/*
* Evaluate connection rules... If no rules found, allow the
* connect. Otherwise stop with the first true rule (ie: rules
* are ored together. Oper connects are effected only by D
* lines (CRULEALL) not d lines (CRULEAUTO).
*/
if ((rule = conf_eval_crule(aconf->name, CRULE_ALL))) {
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Disallowed by rule: %s", sptr, rule);
return 0;
}
/*
* Check to see if the server is juped; if it is, disallow the connect
*/
if ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe)) {
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Connect: Server %s is juped: %s",
sptr, JupeServer(ajupe), JupeReason(ajupe));
return 0;
}
/*
* Allow opers to /connect foo.* 0 bah.* to connect foo and bah
* using the conf's configured port
*/
port = atoi(parv[2]);
/*
* save the old port
*/
tmpport = aconf->address.port;
if (port)
aconf->address.port = port;
else
port = aconf->address.port;
/*
* Notify all operators about remote connect requests
*/
sendwallto_group(&me, WALL_WALLOPS, 0,
"Remote CONNECT %s %s from %s", parv[1],
parv[2] ? parv[2] : "",
get_client_name(sptr, HIDE_IP));
log_write(LS_NETWORK, L_INFO, 0, "CONNECT From %C : %s %s", sptr, parv[1],
parv[2] ? parv[2] : "");
if (connect_server(aconf, sptr)) {
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Connecting to %s.", sptr,
aconf->name);
}
else {
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** Connection to %s failed",
sptr, aconf->name);
}
aconf->address.port = tmpport;
return 0;
}
