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

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

diff --git a/ircd/m_xreply.c b/ircd/m_xreply.c
new file mode 100644 (file)
index 0000000..8a3da48
--- /dev/null
+++ b/ircd/m_xreply.c
@@ -0,0 +1,141 @@
+/*
+ * IRC - Internet Relay Chat, ircd/m_xreply.c
+ * Copyright (C) 2010 Kevin L. Mitchell <klmitch@mit.edu>
+ *
+ * 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 "ircd.h"
+#include "ircd_log.h"
+#include "ircd_reply.h"
+#include "ircd_string.h"
+#include "msg.h"
+#include "numeric.h"
+#include "numnicks.h"
+#include "s_auth.h"
+#include "send.h"
+
+#include <string.h>
+
+/*
+ * ms_xreply - extension message reply handler
+ *
+ * parv[0] = sender prefix
+ * parv[1] = target server numeric
+ * parv[2] = routing information
+ * parv[3] = extension message reply
+ */
+int ms_xreply(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
+{
+  struct Client* acptr;
+  const char* routing;
+  const char* reply;
+
+  if (parc < 4) /* have enough parameters? */
+    return need_more_params(sptr, "XREPLY");
+
+  routing = parv[2];
+  reply = parv[3];
+
+  /* Look up the target */
+  if (!(acptr = findNUser(parv[1])) && !(acptr = FindNServer(parv[1])))
+    return send_reply(sptr, SND_EXPLICIT | ERR_NOSUCHSERVER,
+                     "* :Server has disconnected");
+
+  /* If it's not to us, forward the reply */
+  if (!IsMe(acptr)) {
+    sendcmdto_one(sptr, CMD_XREPLY, acptr, "%C %s :%s", acptr, routing,
+                 reply);
+    return 0;
+  }
+
+  /* OK, figure out where to route the message */
+  if (!ircd_strncmp("iauth:", routing, 6)) {
+    /* Forward the reply to the iauth */
+    routing += 6;
+
+    auth_send_xreply(sptr, routing, reply);
+  } else
+    /* If we don't know where to route it, log it and drop it */
+    log_write(LS_SYSTEM, L_NOTICE, 0, "Received unroutable extension reply "
+             "from %#C to %#C routing %s; message: %s", sptr, acptr,
+             routing, reply);
+
+  return 0;
+}