]>
jfr.im git - irc/quakenet/snircd.git/blob - ircd/m_ping.c
2 * IRC - Internet Relay Chat, ircd/m_ping.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * See file AUTHORS in IRC package for additional names of
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 1, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * $Id: m_ping.c,v 1.12 2005/09/11 17:40:21 decampos Exp $
28 * Excerpt from conversation on #coder-com:
29 * > the number horks it
31 * > thinks it's a numeric?
34 * > why would the number hork it
35 * <Gte-> why is it even looking up servers in a client ping :)
36 * > it's a server ping
41 * > destination = parv[2];
42 * > acptr = FindClient(origin);
43 * > if (acptr && acptr != sptr)
44 * > origin = cptr->name;
45 * > heh, that's a bug :)
46 * <Gte-> yea, client/server handling in the same function sucks :P
47 * > blindly pass a bogus origin around, and where do you send the reply to?
48 * <Gte-> I tried /quote ping 12345 uworld.blah.net locally, and uworld
49 * +recieved -> ":Gte- PING N :Uworld.blah.net"
50 * <Gte-> oh no, sorry, I did ping N :)
51 * > right, it's broken
52 * <Gte-> good thing it doesn't have a fit replying to it
54 * *** plano.tx.us.undernet.org: PONG received from plano.tx.us.undernet.org
55 * > you can send a number for the first ping .. but if you ping a remote server
56 * +it goes to the remote end where it's received as a unsolicited pong by the
57 * +server closest to the target
60 * <Gte-> Parsing: :Gte PING 12345 :widnes.uk.eu.blah.net
61 * <Gte-> Sending [:widnes.uk.eu.blah.net PONG widnes.uk.eu.blah.net
62 * +:12345] to alphatest.blah.net
63 * <Gte-> Parsing: :alphatest.blah.net 402 widnes.uk.eu.blah.net
64 * +12345 :No such server
65 * > oh even better, the pongee sends no such server :)
67 * <Gte-> for a second, I thought you could trigger a loop, which would be
68 * +hideously nasty, but it doesn't look like
69 * > it goes a ------ > b ------- > c ------- > d then c <------- d then c -----
72 * <Gte-> [04:15] -> Server: ping Gte- Dallas-R.Tx.US.Undernet.org
73 * <Gte-> *** PONG from Dallas-R.Tx.US.Undernet.org: Gte-
75 * <Gte-> I can get a ping reply from a server I'm not on :)
78 * m_functions execute protocol messages on this server:
80 * cptr is always NON-NULL, pointing to a *LOCAL* client
81 * structure (with an open socket connected!). This
82 * identifies the physical socket where the message
83 * originated (or which caused the m_function to be
84 * executed--some m_functions may call others...).
86 * sptr is the source of the message, defined by the
87 * prefix part of the message if present. If not
88 * or prefix not found, then sptr==cptr.
90 * (!IsServer(cptr)) => (cptr == sptr), because
91 * prefixes are taken *only* from servers...
94 * (sptr == cptr) => the message didn't
97 * (sptr != cptr && IsServer(sptr) means
98 * the prefix specified servername. (?)
100 * (sptr != cptr && !IsServer(sptr) means
101 * that message originated from a remote
106 * (!IsServer(sptr)) means that, sptr can safely
107 * taken as defining the target structure of the
108 * message in this server.
110 * *Always* true (if 'parse' and others are working correct):
112 * 1) sptr->from == cptr (note: cptr->from == cptr)
114 * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
115 * *cannot* be a local connection, unless it's
116 * actually cptr!). [MyConnect(x) should probably
117 * be defined as (x == x->from) --msa ]
119 * parc number of variable parameter strings (if zero,
120 * parv is allowed to be NULL)
122 * parv a NULL terminated list of parameter pointers,
124 * parv[0], sender (prefix string), if not present
125 * this points to an empty string.
126 * parv[1]...parv[parc-1]
127 * pointers to additional parameters
128 * parv[parc] == NULL, *always*
130 * note: it is guaranteed that parv[0]..parv[parc-1] are all
137 #include "ircd_log.h"
138 #include "ircd_reply.h"
139 #include "ircd_string.h"
143 #include "numnicks.h"
144 #include "opercmds.h"
148 /* #include <assert.h> -- Now using assert in ircd_log.h */
153 * m_ping - generic message handler
155 * parv[0] = sender prefix
157 * parv[2] = destination
159 int m_ping(struct Client
* cptr
, struct Client
* sptr
, int parc
, char* parv
[])
162 assert(cptr
== sptr
);
164 if (parc
< 2 || EmptyString(parv
[1]))
165 return send_reply(sptr
, ERR_NOORIGIN
);
167 sendcmdto_one(&me
, CMD_PONG
, sptr
, "%C :%s", &me
, parv
[1]);
172 * mo_ping - oper message handler
174 * parv[0] = sender prefix
176 * parv[2] = destination
178 int mo_ping(struct Client
* cptr
, struct Client
* sptr
, int parc
, char* parv
[])
180 struct Client
* acptr
;
181 char *destination
, *origin
;
183 assert(cptr
== sptr
);
185 if (parc
< 2 || EmptyString(parv
[1]))
186 return send_reply(sptr
, ERR_NOORIGIN
);
189 destination
= parv
[2]; /* Will get NULL or pointer (parc >= 2!!) */
191 if (!EmptyString(destination
) && 0 != ircd_strcmp(destination
, cli_name(&me
))) {
192 if ((acptr
= FindServer(destination
)))
193 sendcmdto_one(sptr
, CMD_PING
, acptr
, "%C :%s", sptr
, destination
);
195 send_reply(sptr
, ERR_NOSUCHSERVER
, destination
);
199 * NOTE: clients rely on this to return the origin string.
200 * it's pointless to send more than 64 bytes back tho'
202 char* origin
= parv
[1];
204 /* Is this supposed to be here? */
205 acptr
= FindClient(origin
);
206 if (acptr
&& acptr
!= sptr
)
207 origin
= cli_name(cptr
);
209 if (strlen(origin
) > 64)
211 sendcmdto_one(&me
, CMD_PONG
, sptr
, "%C :%s", &me
, origin
);
219 * <Vek> bleep: here's the change you make to PING:
220 * <Vek> F TOK_PING F G 7777777777.7777777
221 * <Vek> then optional parameter for further enhancement
222 * <Vek> G TOK_PONG G F 7777777777.7777777 0.1734637
226 * ms_ping - server message handler
228 int ms_ping(struct Client
* cptr
, struct Client
* sptr
, int parc
, char* parv
[])
230 struct Client
* acptr
;
236 assert(IsServer(cptr
));
238 if (parc
< 2 || EmptyString(parv
[1])) {
240 * don't bother sending the error back
245 destination
= parv
[2]; /* Will get NULL or pointer (parc >= 2!!) */
249 /* AsLL ping, send reply back */
250 int diff
= atoi(militime_float(parv
[3]));
251 sendcmdto_one(&me
, CMD_PONG
, sptr
, "%C %s %s %i %s", &me
, origin
,
252 parv
[3], diff
, militime_float(NULL
));
255 if (!EmptyString(destination
) && 0 != ircd_strcmp(destination
, cli_name(&me
))) {
256 if ((acptr
= FindServer(destination
))) {
258 * Servers can just forward the origin
260 sendcmdto_one(sptr
, CMD_PING
, acptr
, "%s :%s", origin
, destination
);
264 * this can happen if server split before the ping got here
266 send_reply(sptr
, ERR_NOSUCHSERVER
, destination
);
272 * NOTE: sptr is never local so if pong handles numerics everywhere we
273 * could send a numeric here.
275 sendcmdto_one(&me
, CMD_PONG
, sptr
, "%C :%s", &me
, origin
);