- first attempt of socket abstraction (more to do)

2005-11-04 16:27:45 +00:00
parent ae758c7934
commit 45a0721287
6 changed files with 433 additions and 0 deletions
@@ -0,0 +1,131 @@
+/**
+ * @file socket.c
+ * 
+ * @brief management of sockets
+ * 
+ * receiver reads from here, sender writes to here
+ * 
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * 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.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+#include "socket.h"
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <freeswan.h>
+#include <pluto/constants.h>
+#include <pluto/defs.h>
+
+
+
+typedef struct {
+	/**
+	 * public functions
+	 */
+	 socket_t public;
+	 
+	 /**
+	  * currently we only have one socket, maybe more in the future ?
+	  */
+	  int socket_fd;
+} private_socket_t;
+
+
+status_t receiver(private_socket_t *this, packet_t **packet)
+{
+	
+	char buffer[MAX_PACKET];
+	packet_t *pkt = packet_create();
+	
+	/* do the read */
+	pkt->sender.len = sizeof(pkt->sender.addr);
+	pkt->data.len = recvfrom(this->socket_fd, buffer, MAX_PACKET, 0, 
+							&(pkt->sender.addr), &(pkt->sender.len));
+	if (pkt->data.len < 0)
+	{
+		pkt->destroy(pkt);
+		return FAILED;
+	}
+	
+	/* fill in packet */
+	pkt->data.ptr = alloc_bytes(pkt->data.len, "data in packet_t");
+	memcpy(pkt->data.ptr, buffer, pkt->data.len);
+	
+	/* return packet */
+	*packet = pkt;
+	
+	return SUCCESS;	
+}
+	
+status_t sender(private_socket_t *this, packet_t *packet) 
+{
+	ssize_t bytes_sent;
+	
+	printf("@%d\n", __LINE__);
+	/* send data */
+	bytes_sent = sendto(this->socket_fd, packet->data.ptr, packet->data.len, 
+						0, &(packet->receiver.addr), packet->receiver.len);
+				
+	printf("bytes: %d\n", bytes_sent);		
+	if (bytes_sent != packet->data.len) 
+	{
+		return FAILED;
+	}
+	return SUCCESS;
+}
+	
+status_t destroyer(private_socket_t *this)
+{
+	close(this->socket_fd);
+	pfree(this);
+	
+	return SUCCESS;
+}
+
+socket_t *socket_create()
+{
+	private_socket_t *this = alloc_thing(socket_t, "private_socket_t");
+	struct sockaddr_in addr;
+	
+	/* public functions */
+	this->public.send = (status_t(*)(socket_t*, packet_t*))sender;
+	this->public.receive = (status_t(*)(socket_t*, packet_t**))receiver;
+	this->public.destroy = (status_t(*)(socket_t*))destroyer;
+	
+	printf("@%d\n", __LINE__);
+	/* create default ipv4 socket */
+	this->socket_fd = socket(PF_INET, SOCK_DGRAM, 0);
+	if (this->socket_fd < 0) {
+		pfree(this);
+		return NULL;
+	}	
+	
+	printf("@%d\n", __LINE__);
+	addr.sin_family = AF_INET;
+    addr.sin_addr.s_addr = INADDR_ANY;
+    addr.sin_port = 500;
+    if (bind(this->socket_fd,(struct sockaddr*)&addr, sizeof(addr)) < 0) {
+		pfree(this);
+        return NULL;
+    }
+	
+	printf("@%d\n", __LINE__);
+	return (socket_t*)this;
+}