2 * IRC - Internet Relay Chat, ircd/uping.c
3 * Copyright (C) 1994 Carlo Wood ( Run @ undernet.org )
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "ircd_alloc.h"
26 #include "ircd_osdep.h"
27 #include "ircd_string.h"
32 #include "s_bsd.h" /* VirtualHost */
40 #include <arpa/inet.h>
47 #include <sys/socket.h>
51 #define UPINGTIMEOUT 60 /* Timeout waiting for ping responses */
54 #define INADDR_NONE 0xffffffff
57 static struct UPing* pingList = 0;
58 int UPingFileDescriptor = -1; /* UDP listener socket for upings */
61 * pings_begin - iterator function for ping list
63 struct UPing* uping_begin(void)
69 * pings_erase - removes ping struct from ping list
71 static void uping_erase(struct UPing* p)
74 struct UPing* last = 0;
78 for (it = pingList; it; last = it, it = it->next) {
90 * Setup a UDP socket and listen for incoming packets
94 struct sockaddr_in from = { 0 };
97 memset(&from, 0, sizeof(from));
98 from.sin_addr = VirtualHost.sin_addr;
99 from.sin_port = htons(atoi(UDP_PORT));
100 from.sin_family = AF_INET;
102 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
103 Debug((DEBUG_ERROR, "UPING: UDP listener socket call failed: %s",
104 (strerror(errno)) ? strerror(errno) : "Unknown error"));
107 if (!os_set_reuseaddr(fd)) {
108 log_write(LS_SOCKET, L_ERROR, 0,
109 "UPING: set reuseaddr on UDP listener failed: %m (fd %d)", fd);
110 Debug((DEBUG_ERROR, "UPING: set reuseaddr on UDP listener failed: %s",
111 (strerror(errno)) ? strerror(errno) : "Unknown error"));
115 if (bind(fd, (struct sockaddr*) &from, sizeof(from)) == -1) {
116 log_write(LS_SOCKET, L_ERROR, 0,
117 "UPING: bind on UDP listener (%d fd %d) failed: %m",
118 htons(from.sin_port), fd);
119 Debug((DEBUG_ERROR, "UPING: bind on UDP listener failed : %s",
120 (strerror(errno)) ? strerror(errno) : "Unknown error"));
124 if (!os_set_nonblocking(fd)) {
125 Debug((DEBUG_ERROR, "UPING: set non-blocking: %s",
126 (strerror(errno)) ? strerror(errno) : "Unknown error"));
130 UPingFileDescriptor = fd;
136 * max # of pings set to 15/sec.
140 struct sockaddr_in from = { 0 };
141 unsigned int len = 0;
142 static time_t last = 0;
143 static int counter = 0;
144 char buf[BUFSIZE + 1];
146 Debug((DEBUG_DEBUG, "UPING: uping_echo"));
148 if (IO_SUCCESS != os_recvfrom_nonb(UPingFileDescriptor, buf, BUFSIZE, &len, &from))
151 * count em even if we're getting flooded so we can tell we're getting
154 ++ServerStats->uping_recv;
155 if (CurrentTime == last) {
165 sendto(UPingFileDescriptor, buf, len, 0, (struct sockaddr*) &from, sizeof(from));
172 static void uping_start(struct UPing* pptr)
176 sendcmdto_one(&me, CMD_NOTICE, pptr->client, "%C :Sending %d ping%s to %s",
177 pptr->client, pptr->count, (pptr->count == 1) ? "" : "s",
179 pptr->timeout = CurrentTime + UPINGTIMEOUT;
187 void uping_send(struct UPing* pptr)
190 char buf[BUFSIZE + 1];
193 if (pptr->sent == pptr->count)
195 memset(buf, 0, sizeof(buf));
197 gettimeofday(&tv, NULL);
198 sprintf(buf, " %10lu%c%6lu", tv.tv_sec, '\0', tv.tv_usec);
200 Debug((DEBUG_SEND, "send_ping: sending [%s %s] to %s.%d on %d",
202 ircd_ntoa((const char*) &pptr->sin.sin_addr), ntohs(pptr->sin.sin_port),
205 if (sendto(pptr->fd, buf, BUFSIZE, 0, (struct sockaddr*) &pptr->sin,
206 sizeof(struct sockaddr_in)) != BUFSIZE)
208 const char* msg = strerror(errno);
210 msg = "Unknown error";
212 sendcmdto_one(&me, CMD_NOTICE, pptr->client, "%C :UPING: send failed: "
213 "%s", pptr->client, msg);
214 Debug((DEBUG_DEBUG, "UPING: send_ping: sendto failed on %d: %s", pptr->fd, msg));
224 void uping_read(struct UPing* pptr)
226 struct sockaddr_in sin;
229 unsigned int pingtime;
231 char buf[BUFSIZE + 1];
236 gettimeofday(&tv, NULL);
238 ior = os_recvfrom_nonb(pptr->fd, buf, BUFSIZE, &len, &sin);
239 if (IO_BLOCKED == ior)
241 else if (IO_FAILURE == ior) {
242 const char* msg = strerror(errno);
244 msg = "Unknown error";
245 sendcmdto_one(&me, CMD_NOTICE, pptr->client, "%C :UPING: receive error: "
246 "%s", pptr->client, msg);
252 return; /* Broken packet */
257 pingtime = (tv.tv_sec - atol(&buf[1])) * 1000
258 + (tv.tv_usec - atol(buf + strlen(buf) + 1)) / 1000;
260 pptr->ms_ave += pingtime;
261 if (!pptr->ms_min || pptr->ms_min > pingtime)
262 pptr->ms_min = pingtime;
263 if (pingtime > pptr->ms_max)
264 pptr->ms_max = pingtime;
266 pptr->timeout = CurrentTime + UPINGTIMEOUT;
268 Debug((DEBUG_SEND, "read_ping: %d bytes, ti %lu: [%s %s] %lu ms",
269 len, pptr->timeout, buf, (buf + strlen(buf) + 1), pingtime));
271 s = pptr->buf + strlen(pptr->buf);
272 sprintf(s, " %u", pingtime);
274 if (pptr->received == pptr->count)
279 int uping_server(struct Client* sptr, struct ConfItem* aconf, int port, int count)
287 if (INADDR_NONE == aconf->ipnum.s_addr) {
288 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING: Host lookup failed for "
289 "%s", sptr, aconf->name);
294 uping_cancel(sptr, sptr); /* Cancel previous ping request */
296 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
297 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING: Unable to create udp "
298 "ping socket", sptr);
302 if (!os_set_nonblocking(fd)) {
303 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING: Can't set fd non-"
308 pptr = (struct UPing*) MyMalloc(sizeof(struct UPing));
310 memset(pptr, 0, sizeof(struct UPing));
313 pptr->sin.sin_port = htons(port);
314 pptr->sin.sin_addr.s_addr = aconf->ipnum.s_addr;
315 pptr->sin.sin_family = AF_INET;
316 pptr->count = IRCD_MIN(20, count);
319 strcpy(pptr->name, aconf->name);
321 pptr->next = pingList;
330 void uping_end(struct UPing* pptr)
332 Debug((DEBUG_DEBUG, "uping_end: %p", pptr));
335 if (pptr->lastsent) {
336 if (0 < pptr->received) {
337 sendcmdto_one(&me, CMD_NOTICE, pptr->client, "%C :UPING %s%s",
338 pptr->client, pptr->name, pptr->buf);
339 sendcmdto_one(&me, CMD_NOTICE, pptr->client, "%C :UPING Stats: "
340 "sent %d recvd %d ; min/avg/max = %1lu/%1lu/%1lu ms",
341 pptr->client, pptr->sent, pptr->received, pptr->ms_min,
342 (2 * pptr->ms_ave) / (2 * pptr->received), pptr->ms_max);
344 sendcmdto_one(&me, CMD_NOTICE, pptr->client, "%C :UPING: no response "
345 "from %s within %d seconds", pptr->client, pptr->name,
348 sendcmdto_one(&me, CMD_NOTICE, pptr->client, "%C :UPING: Could not "
349 "start ping to %s", pptr->client, pptr->name);
356 ClearUPing(pptr->client);
360 void uping_cancel(struct Client *sptr, struct Client* acptr)
363 struct UPing* ping_next;
365 Debug((DEBUG_DEBUG, "UPING: cancelling uping for %s", sptr->name));
366 for (ping = pingList; ping; ping = ping_next) {
367 ping_next = ping->next;
368 if (sptr == ping->client) {
369 ping->client = acptr;