modules/cap_server_time.c

   1 /*
   2  * charybdis: an advanced ircd.
   3  * cap_server_time.c: implement the server-time IRCv3.2 capability
   4  *
   5  * Copyright (c) 2016 William Pitcock <nenolod@dereferenced.org>
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice is present in all copies.
  10  *
  11  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  12  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  13  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  14  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  15  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  16  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  17  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  18  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  19  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  20  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  21  * POSSIBILITY OF SUCH DAMAGE.
  22  */
  23
  24 #include "stdinc.h"
  25 #include "modules.h"
  26 #include "hook.h"
  27 #include "client.h"
  28 #include "ircd.h"
  29 #include "send.h"
  30 #include "s_conf.h"
  31 #include "s_user.h"
  32 #include "s_serv.h"
  33 #include "numeric.h"
  34 #include "chmode.h"
  35 #include "inline/stringops.h"
  36
  37 static const char cap_server_time_desc[] =
  38         "Provides the server-time client capability";
  39
  40 static void cap_server_time_process(hook_data *);
  41 unsigned int CLICAP_SERVER_TIME = 0;
  42
  43 mapi_hfn_list_av1 cap_server_time_hfnlist[] = {
  44         { "outbound_msgbuf", (hookfn) cap_server_time_process },
  45         { NULL, NULL }
  46 };
  47 mapi_cap_list_av2 cap_server_time_cap_list[] = {
  48         { MAPI_CAP_CLIENT, "server-time", NULL, &CLICAP_SERVER_TIME },
  49         { 0, NULL, NULL, NULL }
  50 };
  51
  52 static void
  53 cap_server_time_process(hook_data *data)
  54 {
  55         static char buf[BUFSIZE];
  56         struct MsgBuf *msgbuf = data->arg1;
  57         struct timeval tv;
  58
  59         if (!rb_gettimeofday(&tv, NULL)) {
  60                 if (strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S.", gmtime(&tv.tv_sec)) == 0)
  61                         return;
  62
  63                 if (rb_snprintf_append(buf, sizeof(buf), "%03uZ", (int)tv.tv_usec / 1000) < 0)
  64                         return;
  65
  66                 msgbuf_append_tag(msgbuf, "time", buf, CLICAP_SERVER_TIME);
  67         }
  68 }
  69
  70 DECLARE_MODULE_AV2(cap_server_time, NULL, NULL, NULL, NULL, cap_server_time_hfnlist, cap_server_time_cap_list, NULL, cap_server_time_desc);