X-Git-Url: http://git.pk910.de/?p=ircu2.10.12-pk.git;a=blobdiff_plain;f=ircd%2Fm_ping.c;fp=ircd%2Fm_ping.c;h=95d747953e3a37d8ede7a9abfac110e0127099f6;hp=0000000000000000000000000000000000000000;hb=0400a5a6479398d82526785c18c0df8bc8b92dce;hpb=d17e10da972ce5776c60b4c317267c6abe0e1ead diff --git a/ircd/m_ping.c b/ircd/m_ping.c new file mode 100644 index 0000000..95d7479 --- /dev/null +++ b/ircd/m_ping.c @@ -0,0 +1,277 @@ +/* + * IRC - Internet Relay Chat, ircd/m_ping.c + * Copyright (C) 1990 Jarkko Oikarinen and + * University of Oulu, Computing Center + * + * See file AUTHORS in IRC package for additional names of + * the programmers. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 1, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * $Id$ + */ + +/* + * Stupid ircd Tricks + * Excerpt from conversation on #coder-com: + * > the number horks it + * yea + * > thinks it's a numeric? + * > no + * hm + * > why would the number hork it + * why is it even looking up servers in a client ping :) + * > it's a server ping + * true + * > oh + * > I know why :) + * > origin = parv[1]; + * > destination = parv[2]; + * > acptr = FindClient(origin); + * > if (acptr && acptr != sptr) + * > origin = cptr->name; + * > heh, that's a bug :) + * yea, client/server handling in the same function sucks :P + * > blindly pass a bogus origin around, and where do you send the reply to? + * I tried /quote ping 12345 uworld.blah.net locally, and uworld + * +recieved -> ":Gte- PING N :Uworld.blah.net" + * oh no, sorry, I did ping N :) + * > right, it's broken + * good thing it doesn't have a fit replying to it + * > hmm + * *** plano.tx.us.undernet.org: PONG received from plano.tx.us.undernet.org + * > you can send a number for the first ping .. but if you ping a remote server + * +it goes to the remote end where it's received as a unsolicited pong by the + * +server closest to the target + * > hahaha + * cool + * Parsing: :Gte PING 12345 :widnes.uk.eu.blah.net + * Sending [:widnes.uk.eu.blah.net PONG widnes.uk.eu.blah.net + * +:12345] to alphatest.blah.net + * Parsing: :alphatest.blah.net 402 widnes.uk.eu.blah.net + * +12345 :No such server + * > oh even better, the pongee sends no such server :) + * > bwhahahah + * for a second, I thought you could trigger a loop, which would be + * +hideously nasty, but it doesn't look like + * > it goes a ------ > b ------- > c ------- > d then c <------- d then c ----- + * +> d :) + * weeee + * [04:15] -> Server: ping Gte- Dallas-R.Tx.US.Undernet.org + * *** PONG from Dallas-R.Tx.US.Undernet.org: Gte- + * there we go + * I can get a ping reply from a server I'm not on :) + */ +/* + * m_functions execute protocol messages on this server: + * + * cptr is always NON-NULL, pointing to a *LOCAL* client + * structure (with an open socket connected!). This + * identifies the physical socket where the message + * originated (or which caused the m_function to be + * executed--some m_functions may call others...). + * + * sptr is the source of the message, defined by the + * prefix part of the message if present. If not + * or prefix not found, then sptr==cptr. + * + * (!IsServer(cptr)) => (cptr == sptr), because + * prefixes are taken *only* from servers... + * + * (IsServer(cptr)) + * (sptr == cptr) => the message didn't + * have the prefix. + * + * (sptr != cptr && IsServer(sptr) means + * the prefix specified servername. (?) + * + * (sptr != cptr && !IsServer(sptr) means + * that message originated from a remote + * user (not local). + * + * combining + * + * (!IsServer(sptr)) means that, sptr can safely + * taken as defining the target structure of the + * message in this server. + * + * *Always* true (if 'parse' and others are working correct): + * + * 1) sptr->from == cptr (note: cptr->from == cptr) + * + * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr + * *cannot* be a local connection, unless it's + * actually cptr!). [MyConnect(x) should probably + * be defined as (x == x->from) --msa ] + * + * parc number of variable parameter strings (if zero, + * parv is allowed to be NULL) + * + * parv a NULL terminated list of parameter pointers, + * + * parv[0], sender (prefix string), if not present + * this points to an empty string. + * parv[1]...parv[parc-1] + * pointers to additional parameters + * parv[parc] == NULL, *always* + * + * note: it is guaranteed that parv[0]..parv[parc-1] are all + * non-NULL pointers. + */ +#include "config.h" + +#include "client.h" +#include "hash.h" +#include "ircd_log.h" +#include "ircd_reply.h" +#include "ircd_string.h" +#include "ircd.h" +#include "msg.h" +#include "numeric.h" +#include "numnicks.h" +#include "opercmds.h" +#include "s_debug.h" +#include "send.h" + +/* #include -- Now using assert in ircd_log.h */ +#include +#include + +/* + * m_ping - generic message handler + * + * parv[0] = sender prefix + * parv[1] = origin + * parv[2] = destination + */ +int m_ping(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) +{ + assert(0 != cptr); + assert(cptr == sptr); + + if (parc < 2 || EmptyString(parv[1])) + return send_reply(sptr, ERR_NOORIGIN); + + sendcmdto_one(&me, CMD_PONG, sptr, "%C :%s", &me, parv[1]); + return 0; +} + +/* + * mo_ping - oper message handler + * + * parv[0] = sender prefix + * parv[1] = origin + * parv[2] = destination + */ +int mo_ping(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) +{ + struct Client* acptr; + char *destination; + assert(0 != cptr); + assert(cptr == sptr); + + if (parc < 2 || EmptyString(parv[1])) + return send_reply(sptr, ERR_NOORIGIN); + + destination = parv[2]; /* Will get NULL or pointer (parc >= 2!!) */ + + if (!EmptyString(destination) && 0 != ircd_strcmp(destination, cli_name(&me))) { + if ((acptr = FindServer(destination))) + sendcmdto_one(sptr, CMD_PING, acptr, "%C :%s", sptr, destination); + else + send_reply(sptr, ERR_NOSUCHSERVER, destination); + } + else { + /* + * NOTE: clients rely on this to return the origin string. + * it's pointless to send more than 64 bytes back tho' + */ + char* origin = parv[1]; + + /* Is this supposed to be here? */ + acptr = FindClient(origin); + if (acptr && acptr != sptr) + origin = cli_name(cptr); + + if (strlen(origin) > 64) + origin[64] = '\0'; + sendcmdto_one(&me, CMD_PONG, sptr, "%C :%s", &me, origin); + } + return 0; +} + +/* + * Extension notes + * + * bleep: here's the change you make to PING: + * F TOK_PING F G 7777777777.7777777 + * then optional parameter for further enhancement + * G TOK_PONG G F 7777777777.7777777 0.1734637 + */ + +/* + * ms_ping - server message handler + */ +int ms_ping(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) +{ + struct Client* acptr; + char* origin; + char* destination; + + assert(0 != cptr); + assert(0 != sptr); + assert(IsServer(cptr)); + + if (parc < 2 || EmptyString(parv[1])) { + /* + * don't bother sending the error back + */ + return 0; + } + origin = parv[1]; + destination = parv[2]; /* Will get NULL or pointer (parc >= 2!!) */ + + if (parc > 3) + { + /* AsLL ping, send reply back */ + int diff = atoi(militime_float(parv[3])); + sendcmdto_one(&me, CMD_PONG, sptr, "%C %s %s %i %s", &me, origin, + parv[3], diff, militime_float(NULL)); + return 0; + } + if (!EmptyString(destination) && 0 != ircd_strcmp(destination, cli_name(&me))) { + if ((acptr = FindServer(destination))) { + /* + * Servers can just forward the origin + */ + sendcmdto_one(sptr, CMD_PING, acptr, "%s :%s", origin, destination); + } + else { + /* + * this can happen if server split before the ping got here + */ + send_reply(sptr, ERR_NOSUCHSERVER, destination); + } + } + else { + /* + * send pong back + * NOTE: sptr is never local so if pong handles numerics everywhere we + * could send a numeric here. + */ + sendcmdto_one(&me, CMD_PONG, sptr, "%C :%s", &me, origin); + } + return 0; +}