X-Git-Url: http://git.pk910.de/?p=ircu2.10.12-pk.git;a=blobdiff_plain;f=ircd%2Fpacket.c;fp=ircd%2Fpacket.c;h=763440864ab2e84ef722f1656d45a25427c7d87e;hp=0000000000000000000000000000000000000000;hb=0400a5a6479398d82526785c18c0df8bc8b92dce;hpb=d17e10da972ce5776c60b4c317267c6abe0e1ead

diff --git a/ircd/packet.c b/ircd/packet.c
new file mode 100644
index 0000000..7634408
--- /dev/null
+++ b/ircd/packet.c
@@ -0,0 +1,188 @@
+/*
+ * IRC - Internet Relay Chat, common/packet.c
+ * Copyright (C) 1990  Jarkko Oikarinen and
+ *                     University of Oulu, Computing Center
+ *
+ * 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.
+ */
+/** @file
+ * @brief Input packet handling functions.
+ * @version $Id$
+ */
+#include "config.h"
+
+#include "packet.h"
+#include "client.h"
+#include "ircd.h"
+#include "ircd_chattr.h"
+#include "ircd_log.h"
+#include "parse.h"
+#include "s_bsd.h"
+#include "s_misc.h"
+#include "send.h"
+
+/* #include <assert.h> -- Now using assert in ircd_log.h */
+
+/** Add a certain number of bytes to a client's received statistics.
+ * @param[in,out] cptr Client to update.
+ * @param[in] length Number of newly received bytes to add.
+ */
+static void update_bytes_received(struct Client* cptr, unsigned int length)
+{
+  cli_receiveB(&me)  += length;     /* Update bytes received */
+  cli_receiveB(cptr) += length;
+}
+
+/** Add one message to a client's received statistics.
+ * @param[in,out] cptr Client to update.
+ */
+static void update_messages_received(struct Client* cptr)
+{
+  ++(cli_receiveM(&me));
+  ++(cli_receiveM(cptr));
+}
+
+/** Handle received data from a directly connected server.
+ * @param[in] cptr Peer server that sent us data.
+ * @param[in] buffer Input buffer.
+ * @param[in] length Number of bytes in input buffer.
+ * @return 1 on success or CPTR_KILLED if the client is squit.
+ */
+int server_dopacket(struct Client* cptr, const char* buffer, int length)
+{
+  const char* src;
+  char*       endp;
+  char*       client_buffer;
+
+  assert(0 != cptr);
+
+  update_bytes_received(cptr, length);
+
+  client_buffer = cli_buffer(cptr);
+  endp = client_buffer + cli_count(cptr);
+  src = buffer;
+
+  while (length-- > 0) {
+    *endp = *src++;
+    /*
+     * Yuck.  Stuck.  To make sure we stay backward compatible,
+     * we must assume that either CR or LF terminates the message
+     * and not CR-LF.  By allowing CR or LF (alone) into the body
+     * of messages, backward compatibility is lost and major
+     * problems will arise. - Avalon
+     */
+    if (IsEol(*endp)) {
+      if (endp == client_buffer)
+        continue;               /* Skip extra LF/CR's */
+      *endp = '\0';
+
+      update_messages_received(cptr);
+
+      if (parse_server(cptr, cli_buffer(cptr), endp) == CPTR_KILLED)
+        return CPTR_KILLED;
+      /*
+       *  Socket is dead so exit
+       */
+      if (IsDead(cptr))
+        return exit_client(cptr, cptr, &me, cli_info(cptr));
+      endp = client_buffer;
+    }
+    else if (endp < client_buffer + BUFSIZE)
+      ++endp;                   /* There is always room for the null */
+  }
+  cli_count(cptr) = endp - cli_buffer(cptr);
+  return 1;
+}
+
+/** Handle received data from a new (unregistered) connection.
+ * @param[in] cptr Unregistered connection that sent us data.
+ * @param[in] buffer Input buffer.
+ * @param[in] length Number of bytes in input buffer.
+ * @return 1 on success or CPTR_KILLED if the client is squit.
+ */
+int connect_dopacket(struct Client *cptr, const char *buffer, int length)
+{
+  const char* src;
+  char*       endp;
+  char*       client_buffer;
+
+  assert(0 != cptr);
+
+  update_bytes_received(cptr, length);
+
+  client_buffer = cli_buffer(cptr);
+  endp = client_buffer + cli_count(cptr);
+  src = buffer;
+
+  while (length-- > 0)
+  {
+    *endp = *src++;
+    /*
+     * Yuck.  Stuck.  To make sure we stay backward compatible,
+     * we must assume that either CR or LF terminates the message
+     * and not CR-LF.  By allowing CR or LF (alone) into the body
+     * of messages, backward compatibility is lost and major
+     * problems will arise. - Avalon
+     */
+    if (IsEol(*endp))
+    {
+      /* Skip extra LF/CR's */
+      if (endp == client_buffer)
+        continue;
+      *endp = '\0';
+
+      update_messages_received(cptr);
+
+      if (parse_client(cptr, cli_buffer(cptr), endp) == CPTR_KILLED)
+        return CPTR_KILLED;
+      /* Socket is dead so exit */
+      if (IsDead(cptr))
+        return exit_client(cptr, cptr, &me, cli_info(cptr));
+      else if (IsServer(cptr))
+      {
+        cli_count(cptr) = 0;
+        return server_dopacket(cptr, src, length);
+      }
+      endp = client_buffer;
+    }
+    else if (endp < client_buffer + BUFSIZE)
+      /* There is always room for the null */
+      ++endp;
+  }
+  cli_count(cptr) = endp - cli_buffer(cptr);
+  return 1;
+}
+
+/** Handle received data from a local client.
+ * @param[in] cptr Local client that sent us data.
+ * @param[in] length Total number of bytes in client's input buffer.
+ * @return 1 on success or CPTR_KILLED if the client is squit.
+ */
+int client_dopacket(struct Client *cptr, unsigned int length)
+{
+  assert(0 != cptr);
+
+  update_bytes_received(cptr, length);
+  update_messages_received(cptr);
+
+  if (CPTR_KILLED == parse_client(cptr, cli_buffer(cptr), cli_buffer(cptr) + length))
+    return CPTR_KILLED;
+  else if (IsDead(cptr))
+    return exit_client(cptr, cptr, &me, cli_info(cptr));
+
+  return 1;
+}
+
+