Implemented IRC function "WHOWAS".
[ngircd-alex.git] / src / ngircd / irc-info.c
index cf283b51d90e8a50280dc547099b6873d37884c9..5a55e3fdeb92b12ef95a92833918acfb7497d112 100644 (file)
@@ -1,6 +1,6 @@
 /*
  * ngIRCd -- The Next Generation IRC Daemon
- * Copyright (c)2001,2002 by Alexander Barton (alex@barton.de)
+ * Copyright (c)2001-2005 Alexander Barton (alex@barton.de)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
 
 #include "portab.h"
 
-static char UNUSED id[] = "$Id: irc-info.c,v 1.28 2005/03/19 18:43:48 fw Exp $";
+static char UNUSED id[] = "$Id: irc-info.c,v 1.29 2005/05/16 12:25:15 alex Exp $";
 
 #include "imp.h"
 #include <assert.h>
 #include <errno.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <strings.h>
 
@@ -722,18 +723,109 @@ IRC_WHOIS( CLIENT *Client, REQUEST *Req )
 } /* IRC_WHOIS */
 
 
+/**
+ * IRC "WHOWAS" function.
+ * This function implements the IRC command "WHOWHAS". It handles local
+ * requests and request that should be forwarded to other servers.
+ */
 GLOBAL bool
 IRC_WHOWAS( CLIENT *Client, REQUEST *Req )
 {
+       CLIENT *target, *prefix;
+       WHOWAS *whowas;
+       int max, last, count, i;
+       char t_str[60];
+       
        assert( Client != NULL );
        assert( Req != NULL );
 
-       /* Falsche Anzahl Parameter? */
-       if(( Req->argc < 1 ) || ( Req->argc > 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
+       /* Wrong number of parameters? */
+       if(( Req->argc < 1 ) || ( Req->argc > 3 ))
+               return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG,
+                                          Client_ID( Client ), Req->command );
 
-       /* ... */
+       /* Search taget */
+       if( Req->argc == 3 )
+               target = Client_Search( Req->argv[2] );
+       else
+               target = Client_ThisServer( );
 
-       return CONNECTED;
+       /* Get prefix */
+       if( Client_Type( Client ) == CLIENT_SERVER )
+               prefix = Client_Search( Req->prefix );
+       else
+               prefix = Client;
+
+       if( ! prefix )
+               return IRC_WriteStrClient( Client, ERR_NOSUCHNICK_MSG,
+                                          Client_ID( Client ), Req->prefix );
+
+       /* Forward to other server? */
+       if( target != Client_ThisServer( ))
+       {
+               if(( ! target ) || ( Client_Type( target ) != CLIENT_SERVER ))
+                       return IRC_WriteStrClient( prefix, ERR_NOSUCHSERVER_MSG,
+                                                  Client_ID( prefix ),
+                                                  Req->argv[2] );
+
+               /* Forward */
+               IRC_WriteStrClientPrefix( target, prefix, "WHOWAS %s %s %s",
+                                         Req->argv[0], Req->argv[1],
+                                         Req->argv[2] );
+               return CONNECTED;
+       }
+       
+       whowas = Client_GetWhowas( );
+       last = Client_GetLastWhowasIndex( );
+       if( last < 0 ) last = 0;
+       
+       if( Req->argc > 1 )
+       {
+               max = atoi( Req->argv[1] );
+               if( max < 1 ) max = MAX_WHOWAS;
+       }
+       else
+               max = DEFAULT_WHOWAS;
+       
+       i = last;
+       count = 0;
+       do
+       {
+               /* Used entry? */
+               if( whowas[i].time > 0 &&
+                   strcasecmp( Req->argv[0], whowas[i].id ) == 0 )
+               {
+                       (void)strftime( t_str, sizeof(t_str),
+                                       "%a %b %d %H:%M:%S %Y",
+                                       localtime( &whowas[i].time ));
+               
+                       if( ! IRC_WriteStrClient( prefix, RPL_WHOWASUSER_MSG,
+                                                 Client_ID( prefix ),
+                                                 whowas[i].id,
+                                                 whowas[i].user,
+                                                 whowas[i].host, 
+                                                 whowas[i].info ))
+                               return DISCONNECTED;
+               
+                       if( ! IRC_WriteStrClient( prefix, RPL_WHOISSERVER_MSG,
+                                                 Client_ID( prefix ),
+                                                 whowas[i].id,
+                                                 whowas[i].server, t_str ))
+                               return DISCONNECTED;
+               
+                       count++;
+                       if( count >= max ) break;
+               }
+               
+               /* previos entry */
+               i--;
+
+               /* "underflow", wrap around */
+               if( i < 0 ) i = MAX_WHOWAS - 1;
+       } while( i != last );
+       
+       return IRC_WriteStrClient( prefix, RPL_ENDOFWHOWAS_MSG,
+                                  Client_ID( prefix ), Req->argv[0] );
 } /* IRC_WHOWAS */