Merge branch 'u2_10_12_branch' of git://git.code.sf.net/p/undernet-ircu/ircu2

[ircu2.10.12-pk.git] / ircd / m_ison.c

diff --git a/ircd/m_ison.c b/ircd/m_ison.c
new file mode 100644 (file)
index 0000000..00adddc
--- /dev/null
+++ b/ircd/m_ison.c
@@ -0,0 +1,144 @@
+/*
+ * IRC - Internet Relay Chat, ircd/m_ison.c
+ * Copyright (C) 1990 Jarkko Oikarinen and
+ *                    University of Oulu, Computing Center
+ *
+ * See file AUTHORS in IRC package for additional names of
+ * the programmers.
+ *
+ * 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
+ * the Free Software Foundation; either version 1, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id$
+ */
+
+/*
+ * m_functions execute protocol messages on this server:
+ *
+ *    cptr    is always NON-NULL, pointing to a *LOCAL* client
+ *            structure (with an open socket connected!). This
+ *            identifies the physical socket where the message
+ *            originated (or which caused the m_function to be
+ *            executed--some m_functions may call others...).
+ *
+ *    sptr    is the source of the message, defined by the
+ *            prefix part of the message if present. If not
+ *            or prefix not found, then sptr==cptr.
+ *
+ *            (!IsServer(cptr)) => (cptr == sptr), because
+ *            prefixes are taken *only* from servers...
+ *
+ *            (IsServer(cptr))
+ *                    (sptr == cptr) => the message didn't
+ *                    have the prefix.
+ *
+ *                    (sptr != cptr && IsServer(sptr) means
+ *                    the prefix specified servername. (?)
+ *
+ *                    (sptr != cptr && !IsServer(sptr) means
+ *                    that message originated from a remote
+ *                    user (not local).
+ *
+ *            combining
+ *
+ *            (!IsServer(sptr)) means that, sptr can safely
+ *            taken as defining the target structure of the
+ *            message in this server.
+ *
+ *    *Always* true (if 'parse' and others are working correct):
+ *
+ *    1)      sptr->from == cptr  (note: cptr->from == cptr)
+ *
+ *    2)      MyConnect(sptr) <=> sptr == cptr (e.g. sptr
+ *            *cannot* be a local connection, unless it's
+ *            actually cptr!). [MyConnect(x) should probably
+ *            be defined as (x == x->from) --msa ]
+ *
+ *    parc    number of variable parameter strings (if zero,
+ *            parv is allowed to be NULL)
+ *
+ *    parv    a NULL terminated list of parameter pointers,
+ *
+ *                    parv[0], sender (prefix string), if not present
+ *                            this points to an empty string.
+ *                    parv[1]...parv[parc-1]
+ *                            pointers to additional parameters
+ *                    parv[parc] == NULL, *always*
+ *
+ *            note:   it is guaranteed that parv[0]..parv[parc-1] are all
+ *                    non-NULL pointers.
+ */
+#include "config.h"
+
+#include "client.h"
+#include "hash.h"
+#include "ircd.h"
+#include "ircd_log.h"
+#include "ircd_reply.h"
+#include "ircd_string.h"
+#include "msgq.h"
+#include "numeric.h"
+#include "send.h"
+
+/* #include <assert.h> -- Now using assert in ircd_log.h */
+#include <string.h>
+
+/*
+ * m_ison
+ *
+ * Added by Darren Reed 13/8/91 to act as an efficient user indicator
+ * with respect to cpu/bandwidth used. Implemented for NOTIFY feature in
+ * clients. Designed to reduce number of whois requests. Can process
+ * nicknames in batches as long as the maximum buffer length.
+ *
+ * format:
+ * ISON :nicklist
+ *
+ * XXX - this is virtually the same as send_user_info, but doesn't send
+ * no nick found, might be refactored so that m_userhost, m_userip, and
+ * m_ison all use the same function with different formatters. --Bleep
+ */
+int m_ison(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
+{
+  struct Client* acptr;
+  char*          name;
+  char*          p = 0;
+  struct MsgBuf* mb;
+  int i;
+
+  if (parc < 2)
+    return need_more_params(sptr, "ISON");
+
+  mb = msgq_make(sptr, rpl_str(RPL_ISON), cli_name(&me), cli_name(sptr));
+
+  for (i = 1; i < parc; i++) {
+    for (name = ircd_strtok(&p, parv[i], " "); name;
+        name = ircd_strtok(&p, 0, " ")) {
+      if ((acptr = FindUser(name))) {
+       if (msgq_bufleft(mb) < strlen(cli_name(acptr)) + 1) {
+         send_buffer(sptr, mb, 0); /* send partial response */
+         msgq_clean(mb); /* then do another round */
+         mb = msgq_make(sptr, rpl_str(RPL_ISON), cli_name(&me),
+                        cli_name(sptr));
+       }
+       msgq_append(0, mb, "%s ", cli_name(acptr));
+      }
+    }
+  }
+
+  send_buffer(sptr, mb, 0); /* send response */
+  msgq_clean(mb);
+
+  return 0;
+}