whowas/whowas.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include "../core/hooks.h"
   4 #include "../control/control.h"
   5 #include "../irc/irc.h"
   6 #include "../lib/irc_string.h"
   7 #include "../lib/version.h"
   8 #include "whowas.h"
   9
  10 MODULE_VERSION("");
  11
  12 whowas *whowas_head = NULL, *whowas_tail = NULL;
  13 int whowas_count = 0;
  14
  15 whowas *whowas_fromnick(nick *np) {
  16   whowas *ww;
  17
  18   /* Create a new record. */
  19   ww = malloc(sizeof(whowas));
  20   memset(ww, 0, sizeof(whowas));
  21   strncpy(ww->nick, np->nick, NICKLEN);
  22   strncpy(ww->ident, np->ident, USERLEN);
  23   strncpy(ww->host, np->host->name->content, HOSTLEN);
  24   memcpy(&ww->ip, &np->p_ipaddr, sizeof(struct irc_in_addr));
  25   strncpy(ww->realname, np->realname->name->content, REALLEN);
  26   ww->seen = getnettime();
  27
  28   return ww;
  29 }
  30
  31 void whowas_linkrecord(whowas *ww) {
  32   if (whowas_head)
  33     whowas_head->prev = ww;
  34
  35   ww->next = whowas_head;
  36   whowas_head = ww;
  37
  38   ww->prev = NULL;
  39
  40   if (!whowas_tail)
  41     whowas_tail = ww;
  42
  43   whowas_count++;
  44 }
  45
  46 void whowas_unlinkrecord(whowas *ww) {
  47   if (!ww->next)
  48     whowas_tail = ww->prev;
  49
  50   if (ww->prev)
  51     ww->prev->next = NULL;
  52   else
  53     whowas_head = ww->prev;
  54
  55   whowas_count--;
  56 }
  57
  58 static void whowas_cleanup(void) {
  59   time_t now;
  60
  61   time(&now);
  62
  63   /* Clean up old records. */
  64   while (whowas_tail && (whowas_tail->seen < now - WW_MAXAGE || whowas_count >= WW_MAXENTRIES)) {
  65     whowas_unlinkrecord(whowas_tail);
  66     free(whowas_tail);
  67   }
  68 }
  69
  70 static void whowas_handlequitorkill(int hooknum, void *arg) {
  71   void **args = arg;
  72   nick *np = args[0];
  73   char *reason = args[1];
  74   char *rreason;
  75   char resbuf[512];
  76   whowas *ww;
  77
  78   whowas_cleanup();
  79
  80   /* Create a new record. */
  81   ww = whowas_fromnick(np);
  82
  83   if (hooknum == HOOK_NICK_KILL) {
  84     if ((rreason = strchr(reason, ' '))) {
  85       sprintf(resbuf, "Killed%s", rreason);
  86       reason = resbuf;
  87     }
  88
  89     ww->type = WHOWAS_KILL;
  90   } else
  91     ww->type = WHOWAS_QUIT;
  92
  93   ww->reason = getsstring(reason, WW_REASONLEN);
  94
  95   whowas_linkrecord(ww);
  96 }
  97
  98 static void whowas_handlerename(int hooknum, void *arg) {
  99   void **args = arg;
 100   nick *np = args[0];
 101   char *oldnick = args[1];
 102   whowas *ww;
 103
 104   whowas_cleanup();
 105
 106   ww = whowas_fromnick(np);
 107   ww->type = WHOWAS_RENAME;
 108   ww->newnick = getsstring(ww->nick, NICKLEN);
 109   strncpy(ww->nick, oldnick, NICKLEN);
 110   ww->nick[NICKLEN] = '\0';
 111
 112   whowas_linkrecord(ww);
 113 }
 114
 115 whowas *whowas_chase(const char *nick, int maxage) {
 116   whowas *ww;
 117   time_t now;
 118
 119   now = getnettime();
 120
 121   for (ww = whowas_head; ww; ww = ww->next) {
 122     if (ww->seen < now - maxage)
 123       break; /* records are in timestamp order, we're done */
 124
 125     if (ircd_strcmp(ww->nick, nick) == 0)
 126       return ww;
 127   }
 128
 129   return NULL;
 130 }
 131
 132 void _init(void) {
 133   registerhook(HOOK_NICK_QUIT, whowas_handlequitorkill);
 134   registerhook(HOOK_NICK_KILL, whowas_handlequitorkill);
 135   registerhook(HOOK_NICK_RENAME, whowas_handlerename);
 136 }
 137
 138 void _fini(void) {
 139   deregisterhook(HOOK_NICK_QUIT, whowas_handlequitorkill);
 140   deregisterhook(HOOK_NICK_KILL, whowas_handlequitorkill);
 141   deregisterhook(HOOK_NICK_RENAME, whowas_handlerename);
 142
 143   while (whowas_head)
 144     whowas_unlinkrecord(whowas_head);
 145 }