src/send-announce.cc

   1 /*
   2  * Copyright (C) 1996-2018 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 27    Cache Announcer */
  10
  11 #include "squid.h"
  12 #include "anyp/PortCfg.h"
  13 #include "comm/Connection.h"
  14 #include "event.h"
  15 #include "fd.h"
  16 #include "fde.h"
  17 #include "fs_io.h"
  18 #include "globals.h"
  19 #include "ICP.h"
  20 #include "ipcache.h"
  21 #include "SquidConfig.h"
  22 #include "SquidTime.h"
  23 #include "tools.h"
  24
  25 static IPH send_announce;
  26
  27 void
  28 start_announce(void *)
  29 {
  30     if (0 == Config.onoff.announce)
  31         return;
  32
  33     if (!Comm::IsConnOpen(icpOutgoingConn))
  34         return;
  35
  36     ipcache_nbgethostbyname(Config.Announce.host, send_announce, NULL);
  37
  38     eventAdd("send_announce", start_announce, NULL, (double) Config.Announce.period, 1);
  39 }
  40
  41 static void
  42 send_announce(const ipcache_addrs *ia, const Dns::LookupDetails &, void *)
  43 {
  44     LOCAL_ARRAY(char, tbuf, 256);
  45     LOCAL_ARRAY(char, sndbuf, BUFSIZ);
  46
  47     char *host = Config.Announce.host;
  48     char *file = NULL;
  49     unsigned short port = Config.Announce.port;
  50     int l;
  51     int n;
  52     int fd;
  53
  54     if (ia == NULL) {
  55         debugs(27, DBG_IMPORTANT, "send_announce: Unknown host '" << host << "'");
  56         return;
  57     }
  58
  59     debugs(27, DBG_IMPORTANT, "Sending Announcement to " << host);
  60     sndbuf[0] = '\0';
  61     snprintf(tbuf, 256, "cache_version SQUID/%s\n", version_string);
  62     strcat(sndbuf, tbuf);
  63     assert(HttpPortList != NULL);
  64     snprintf(tbuf, 256, "Running on %s %d %d\n",
  65              getMyHostname(),
  66              getMyPort(),
  67              (int) Config.Port.icp);
  68     strcat(sndbuf, tbuf);
  69
  70     if (Config.adminEmail) {
  71         snprintf(tbuf, 256, "cache_admin: %s\n", Config.adminEmail);
  72         strcat(sndbuf, tbuf);
  73     }
  74
  75     snprintf(tbuf, 256, "generated %d [%s]\n",
  76              (int) squid_curtime,
  77              Time::FormatHttpd(squid_curtime));
  78     strcat(sndbuf, tbuf);
  79     l = strlen(sndbuf);
  80
  81     if ((file = Config.Announce.file) != NULL) {
  82         fd = file_open(file, O_RDONLY | O_TEXT);
  83
  84         if (fd > -1 && (n = FD_READ_METHOD(fd, sndbuf + l, BUFSIZ - l - 1)) > 0) {
  85             fd_bytes(fd, n, FD_READ);
  86             l += n;
  87             sndbuf[l] = '\0';
  88             file_close(fd);
  89         } else {
  90             int xerrno = errno;
  91             debugs(50, DBG_IMPORTANT, "send_announce: " << file << ": " << xstrerr(xerrno));
  92         }
  93     }
  94
  95     Ip::Address S = ia->current();
  96     S.port(port);
  97     assert(Comm::IsConnOpen(icpOutgoingConn));
  98
  99     if (comm_udp_sendto(icpOutgoingConn->fd, S, sndbuf, strlen(sndbuf) + 1) < 0) {
 100         int xerrno = errno;
 101         debugs(27, DBG_IMPORTANT, "ERROR: Failed to announce to " << S << " from " << icpOutgoingConn->local << ": " << xstrerr(xerrno));
 102     }
 103 }
 104