miscreply/time.c

   1 /* time.c */
   2
   3 #include "miscreply.h"
   4 #include "../irc/irc.h"
   5 #include "../core/error.h"
   6
   7 #include <stdio.h>
   8
   9
  10
  11 /*
  12  *  Return the current date in the following format:
  13  *          "Day Month DD YYYY -- HH:MM +/-HH:MM"
  14  *     e.g. "Saturday March 27 2010 -- 19:03 +01:00"
  15  *    where the last part is the timezone offset
  16  *
  17  */
  18 static char *timelongdate(void) {
  19   static char buf[64];
  20   unsigned int off;
  21   struct tm *tmp;
  22   time_t gt, lt;
  23   size_t n;
  24   char c;
  25
  26   lt = time(NULL);
  27
  28   tmp = localtime(&lt);
  29
  30   if (tmp == NULL)
  31     return "";
  32
  33   n = strftime(buf, sizeof(buf) - 8, "%A %B %e %Y -- %H:%M", tmp);
  34
  35   if (!n)
  36     return "";
  37
  38   tmp = gmtime(&lt);
  39
  40   if (tmp == NULL)
  41     return "";
  42
  43   gt = mktime(tmp);
  44
  45   if (gt > lt) {
  46     c = '-';
  47     off = (unsigned int) (gt - lt);
  48   } else {
  49     c = '+';
  50     off = (unsigned int) (lt - gt);
  51   }
  52
  53   off = (off / 60) % 6000;
  54   sprintf(&buf[n], " %c%02u:%02u", c, off / 60, off % 60);
  55
  56   return buf;
  57 }
  58
  59
  60
  61 /* handle remote time request
  62  *
  63  * <source numeric> TIME/TI <target server numeric>
  64  *
  65  * cargv[0] = target server numeric
  66  *            can be a * in which case the request is for all servers (snircd extension)
  67  *
  68  */
  69 int handletimemsg(void *source, int cargc, char **cargv) {
  70
  71   nick *snick;                                         /* struct nick for source nick */
  72   long unsigned int timestamp = getnettime();          /* current nettime */
  73   long unsigned int offset = timestamp - time(NULL);   /* offset nettime to system clock */
  74   char *sourcenum = (char *)source;                    /* source user numeric */
  75
  76   /* check parameters */
  77   if (cargc < 1) {
  78     miscreply_needmoreparams(sourcenum, "TIME");
  79     return CMD_OK;
  80   }
  81
  82   /* find source user */
  83   if (!(snick = miscreply_finduser(sourcenum, "TIME")))
  84     return CMD_OK;
  85
  86   /*
  87    * 391 RPL_TIME "source 391 target servername timestamp offset :longdate"
  88    *              "irc.netsplit.net 391 foobar irc.netsplit.net 1269713493 0 :Saturday March 27 2010 -- 19:11 +01:00"
  89    */
  90   irc_send("%s 391 %s %s %lu %ld :%s", getmynumeric(), sourcenum, myserver->content, timestamp, offset, timelongdate());
  91
  92   return CMD_OK;
  93 }