[Tools] Added the UdpDebugReader

by @dimok789

tools/udp_debug_reader/source/network.c

@@ -0,0 +1,107 @@
+/****************************************************************************
+ * Copyright (C) 2010-2012
+ * by Dimok
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any
+ * damages arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any
+ * purpose, including commercial applications, and to alter it and
+ * redistribute it freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you
+ * must not claim that you wrote the original software. If you use
+ * this software in a product, an acknowledgment in the product
+ * documentation would be appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and
+ * must not be misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+ ***************************************************************************/
+#include <stdio.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "network.h" // Include Winsock Library
+
+static int sock_id = -1;
+static struct sockaddr_in servaddr;
+
+int Bind()
+{
+    memset(&servaddr,0,sizeof(servaddr));
+
+	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+    servaddr.sin_port = htons(LISTEN_PORT);
+    servaddr.sin_family = AF_INET;
+
+    if (bind(sock_id, (struct sockaddr*)&servaddr, sizeof(servaddr)) < 0)
+    {
+        close(sock_id);
+        return -1;
+    }
+
+    return 0;
+}
+
+void CloseSocket()
+{
+    if(sock_id < 0)
+        return;
+
+    close(sock_id);
+    sock_id = -1;
+}
+
+int NetInit()
+{
+    if(sock_id >= 0)
+        return sock_id;
+
+#ifdef WIN32
+	WSADATA wsaData;
+
+	// Initialize Winsock
+	if (WSAStartup(MAKEWORD(2,2), &wsaData) == SOCKET_ERROR)
+		return -1;
+#endif
+    //Get a socket
+    if((sock_id = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP)) == -1)
+        return -1;
+
+#ifdef WIN32
+    u_long mode = 1;
+    ioctlsocket(sock_id, FIONBIO, &mode);
+#else
+    int flags = fcntl(sock_id, F_GETFL, 0);
+    fcntl(sock_id, F_SETFL, flags | O_NONBLOCK);
+#endif
+
+    return sock_id;
+}
+
+int NetRead(void *buffer, unsigned int buf_len)
+{
+	if(sock_id < 0)
+		return sock_id;
+
+    fd_set fdsRead;
+    FD_ZERO(&fdsRead);
+    FD_SET(sock_id, &fdsRead);
+
+    struct timeval tv;
+    tv.tv_sec = 0;
+    tv.tv_usec = 10000;
+
+    if(select(sock_id + 1, &fdsRead, NULL, NULL, &tv) != 1) {
+        return 0;
+    }
+
+	int len = sizeof(servaddr);
+
+	return recvfrom(sock_id,buffer, buf_len, 0,(struct sockaddr *)&servaddr, &len);
+}