[9935] ACE realmd, thanks to Zor and Vladimir for windows.

src/realmd/BufferedSocket.cpp

@@ -0,0 +1,265 @@
+/*
+ * Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
+ *
+ * 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 2 of the License, 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/** \file
+  \ingroup realmd
+  */
+
+#include "BufferedSocket.h"
+
+#include <ace/OS_NS_string.h>
+#include <ace/INET_Addr.h>
+#include <ace/SString.h>
+
+#ifndef MSG_NOSIGNAL
+#define MSG_NOSIGNAL 0
+#endif
+
+BufferedSocket::BufferedSocket(void):
+    input_buffer_(4096),
+    remote_address_("<unknown>")
+{
+}
+
+/*virtual*/ BufferedSocket::~BufferedSocket(void)
+{
+}
+
+/*virtual*/ int BufferedSocket::open(void * arg)
+{
+    if(Base::open(arg) == -1)
+        return -1;
+
+    ACE_INET_Addr addr;
+
+    if(peer().get_remote_addr(addr) == -1)
+        return -1;
+
+    char address[1024];
+
+    addr.get_host_addr(address, 1024);
+
+    this->remote_address_ = address;
+
+    this->OnAccept();
+
+    return 0;
+}
+
+const std::string& BufferedSocket::get_remote_address(void) const
+{
+    return this->remote_address_;
+}
+
+size_t BufferedSocket::recv_len(void) const
+{
+    return this->input_buffer_.length();
+}
+
+bool BufferedSocket::recv_soft(char *buf, size_t len)
+{
+    if(this->input_buffer_.length() < len)
+        return false;
+
+    ACE_OS::memcpy(buf, this->input_buffer_.rd_ptr(), len);
+
+    return true;
+}
+
+bool BufferedSocket::recv(char *buf, size_t len)
+{
+    bool ret = this->recv_soft(buf, len);
+
+    if(ret)
+        this->recv_skip(len);
+
+    return ret;
+}
+
+void BufferedSocket::recv_skip(size_t len)
+{
+    this->input_buffer_.rd_ptr(len);
+}
+
+ssize_t BufferedSocket::noblk_send(ACE_Message_Block &message_block)
+{
+    const size_t len = message_block.length();
+
+    if(len == 0)
+        return -1;
+
+    // Try to send the message directly.
+    ssize_t n = this->peer().send(message_block.rd_ptr(), len, MSG_NOSIGNAL);
+
+    if(n < 0)
+    {
+        if(errno == EWOULDBLOCK)
+            // Blocking signal
+            return 0;
+        else
+            // Error
+            return -1;
+    }
+    else if(n == 0)
+    {
+        // Can this happen ?
+        return -1;
+    }
+
+    // return bytes transmitted
+    return n;
+}
+
+bool BufferedSocket::send(const char *buf, size_t len)
+{
+    if(buf == NULL || len == 0)
+        return true;
+
+    ACE_Data_Block db(
+            len,
+            ACE_Message_Block::MB_DATA,
+            (const char*)buf,
+            0,
+            0,
+            ACE_Message_Block::DONT_DELETE,
+            0);
+
+    ACE_Message_Block message_block(
+            &db,
+            ACE_Message_Block::DONT_DELETE,
+            0);
+
+    message_block.wr_ptr(len);
+
+    if(this->msg_queue()->is_empty())
+    {
+        // Try to send it directly.
+        ssize_t n = this->noblk_send(message_block);
+
+        if(n < 0)
+            return false;
+        else if(n == len)
+            return true;
+
+        // adjust how much bytes we sent
+        message_block.rd_ptr((size_t)n);
+
+        // fall down
+    }
+
+    // enqueue the message, note: clone is needed cause we cant enqueue stuff on the stack
+    ACE_Message_Block *mb = message_block.clone();
+
+    if(this->msg_queue()->enqueue_tail(mb, (ACE_Time_Value *) &ACE_Time_Value::zero) == -1)
+    {
+        mb->release();
+        return false;
+    }
+
+    // tell reactor to call handle_output() when we can send more data
+    if(this->reactor()->schedule_wakeup(this, ACE_Event_Handler::WRITE_MASK) == -1)
+        return false;
+
+    return true;
+}
+
+/*virtual*/ int BufferedSocket::handle_output(ACE_HANDLE /*= ACE_INVALID_HANDLE*/)
+{
+    ACE_Message_Block *mb = 0;
+
+    if(this->msg_queue()->is_empty())
+    {
+        // if no more data to send, then cancel notification
+        this->reactor()->cancel_wakeup(this, ACE_Event_Handler::WRITE_MASK);
+        return 0;
+    }
+
+    if(this->msg_queue()->dequeue_head(mb, (ACE_Time_Value *) &ACE_Time_Value::zero) == -1)
+        return -1;
+
+    ssize_t n = this->noblk_send(*mb);
+
+    if(n < 0)
+    {
+        mb->release();
+        return -1;
+    }
+    else if(n == mb->length())
+    {
+        mb->release();
+        return 1;
+    }
+    else
+    {
+        mb->rd_ptr(n);
+
+        if(this->msg_queue()->enqueue_head(mb, (ACE_Time_Value *) &ACE_Time_Value::zero) == -1)
+        {
+            mb->release();
+            return -1;
+        }
+
+        return 0;
+    }
+
+    ACE_NOTREACHED(return -1);
+}
+
+/*virtual*/ int BufferedSocket::handle_input(ACE_HANDLE /*= ACE_INVALID_HANDLE*/)
+{
+    const ssize_t space = this->input_buffer_.space();
+
+    ssize_t n = this->peer().recv(this->input_buffer_.wr_ptr(), space);
+
+    if(n < 0)
+    {
+        // blocking signal or error
+        return errno == EWOULDBLOCK ? 0 : -1;
+    }
+    else if(n == 0)
+    {
+        // EOF
+        return -1;
+    }
+
+    this->input_buffer_.wr_ptr((size_t)n);
+
+    this->OnRead();
+
+    // move data in the buffer to the beginning of the buffer
+    this->input_buffer_.crunch();
+
+    // return 1 in case there might be more data to read from OS
+    return n == space ? 1 : 0;
+}
+
+/*virtual*/ int BufferedSocket::handle_close(ACE_HANDLE h, ACE_Reactor_Mask m)
+{
+    this->OnClose();
+
+    Base::handle_close();
+
+    return 0;
+}
+
+void BufferedSocket::close_connection(void)
+{
+    this->peer().close_reader();
+    this->peer().close_writer();
+}
+