Imported Upstream version 1.9.1upstream/1.9.1upstream

Change-Id: I8ccc371679c730299ebe8068ed5af0ae033c4f7d
Signed-off-by: Cheoleun Moon <chleun.moon@samsung.com>

1 files changed, 195 insertions, 0 deletions

diff --git a/rpcap-protocol.c b/rpcap-protocol.c
new file mode 100644
index 0000000..692f7c5
--- /dev/null
+++ b/rpcap-protocol.c
@@ -0,0 +1,195 @@
+/*
+ * Copyright (c) 2002 - 2005 NetGroup, Politecnico di Torino (Italy)
+ * Copyright (c) 2005 - 2008 CACE Technologies, Davis (California)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Politecnico di Torino, CACE Technologies
+ * nor the names of its contributors may be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>		/* for strlen(), ... */
+#include <stdlib.h>		/* for malloc(), free(), ... */
+#include <stdarg.h>		/* for functions with variable number of arguments */
+#include <errno.h>		/* for the errno variable */
+#include "sockutils.h"
+#include "portability.h"
+#include "rpcap-protocol.h"
+#include <pcap/pcap.h>
+
+/*
+ * This file contains functions used both by the rpcap client and the
+ * rpcap daemon.
+ */
+
+/*
+ * This function sends a RPCAP error to our peer.
+ *
+ * It has to be called when the main program detects an error.
+ * It will send to our peer the 'buffer' specified by the user.
+ * This function *does not* request a RPCAP CLOSE connection. A CLOSE
+ * command must be sent explicitly by the program, since we do not know
+ * whether the error can be recovered in some way or if it is a
+ * non-recoverable one.
+ *
+ * \param sock: the socket we are currently using.
+ *
+ * \param ver: the protocol version we want to put in the reply.
+ *
+ * \param errcode: a integer which tells the other party the type of error
+ * we had.
+ *
+ * \param error: an user-allocated (and '0' terminated) buffer that contains
+ * the error description that has to be transmitted to our peer. The
+ * error message cannot be longer than PCAP_ERRBUF_SIZE.
+ *
+ * \param errbuf: a pointer to a user-allocated buffer (of size
+ * PCAP_ERRBUF_SIZE) that will contain the error message (in case there
+ * is one). It could be network problem.
+ *
+ * \return '0' if everything is fine, '-1' if some errors occurred. The
+ * error message is returned in the 'errbuf' variable.
+ */
+int
+rpcap_senderror(SOCKET sock, uint8 ver, unsigned short errcode, const char *error, char *errbuf)
+{
+	char sendbuf[RPCAP_NETBUF_SIZE];	/* temporary buffer in which data to be sent is buffered */
+	int sendbufidx = 0;			/* index which keeps the number of bytes currently buffered */
+	uint16 length;
+
+	length = (uint16)strlen(error);
+
+	if (length > PCAP_ERRBUF_SIZE)
+		length = PCAP_ERRBUF_SIZE;
+
+	rpcap_createhdr((struct rpcap_header *) sendbuf, ver, RPCAP_MSG_ERROR, errcode, length);
+
+	if (sock_bufferize(NULL, sizeof(struct rpcap_header), NULL, &sendbufidx,
+		RPCAP_NETBUF_SIZE, SOCKBUF_CHECKONLY, errbuf, PCAP_ERRBUF_SIZE))
+		return -1;
+
+	if (sock_bufferize(error, length, sendbuf, &sendbufidx,
+		RPCAP_NETBUF_SIZE, SOCKBUF_BUFFERIZE, errbuf, PCAP_ERRBUF_SIZE))
+		return -1;
+
+	if (sock_send(sock, sendbuf, sendbufidx, errbuf, PCAP_ERRBUF_SIZE) < 0)
+		return -1;
+
+	return 0;
+}
+
+/*
+ * This function fills in a structure of type rpcap_header.
+ *
+ * It is provided just because the creation of an rpcap header is a common
+ * task. It accepts all the values that appears into an rpcap_header, and
+ * it puts them in place using the proper hton() calls.
+ *
+ * \param header: a pointer to a user-allocated buffer which will contain
+ * the serialized header, ready to be sent on the network.
+ *
+ * \param ver: a value (in the host byte order) which will be placed into the
+ * header.ver field and that represents the protocol version number of the
+ * current message.
+ *
+ * \param type: a value (in the host byte order) which will be placed into the
+ * header.type field and that represents the type of the current message.
+ *
+ * \param value: a value (in the host byte order) which will be placed into
+ * the header.value field and that has a message-dependent meaning.
+ *
+ * \param length: a value (in the host by order) which will be placed into
+ * the header.length field, representing the payload length of the message.
+ *
+ * \return Nothing. The serialized header is returned into the 'header'
+ * variable.
+ */
+void
+rpcap_createhdr(struct rpcap_header *header, uint8 ver, uint8 type, uint16 value, uint32 length)
+{
+	memset(header, 0, sizeof(struct rpcap_header));
+
+	header->ver = ver;
+	header->type = type;
+	header->value = htons(value);
+	header->plen = htonl(length);
+}
+
+/*
+ * Convert a message type to a string containing the type name.
+ */
+static const char *requests[] =
+{
+	NULL,				/* not a valid message type */
+	"RPCAP_MSG_ERROR",
+	"RPCAP_MSG_FINDALLIF_REQ",
+	"RPCAP_MSG_OPEN_REQ",
+	"RPCAP_MSG_STARTCAP_REQ",
+	"RPCAP_MSG_UPDATEFILTER_REQ",
+	"RPCAP_MSG_CLOSE",
+	"RPCAP_MSG_PACKET",
+	"RPCAP_MSG_AUTH_REQ",
+	"RPCAP_MSG_STATS_REQ",
+	"RPCAP_MSG_ENDCAP_REQ",
+	"RPCAP_MSG_SETSAMPLING_REQ",
+};
+#define NUM_REQ_TYPES	(sizeof requests / sizeof requests[0])
+
+static const char *replies[] =
+{
+	NULL,
+	NULL,			/* this would be a reply to RPCAP_MSG_ERROR */
+	"RPCAP_MSG_FINDALLIF_REPLY",
+	"RPCAP_MSG_OPEN_REPLY",
+	"RPCAP_MSG_STARTCAP_REPLY",
+	"RPCAP_MSG_UPDATEFILTER_REPLY",
+	NULL,			/* this would be a reply to RPCAP_MSG_CLOSE */
+	NULL,			/* this would be a reply to RPCAP_MSG_PACKET */
+	"RPCAP_MSG_AUTH_REPLY",
+	"RPCAP_MSG_STATS_REPLY",
+	"RPCAP_MSG_ENDCAP_REPLY",
+	"RPCAP_MSG_SETSAMPLING_REPLY",
+};
+#define NUM_REPLY_TYPES	(sizeof replies / sizeof replies[0])
+
+const char *
+rpcap_msg_type_string(uint8 type)
+{
+	if (type & RPCAP_MSG_IS_REPLY) {
+		type &= ~RPCAP_MSG_IS_REPLY;
+		if (type >= NUM_REPLY_TYPES)
+			return NULL;
+		return replies[type];
+	} else {
+		if (type >= NUM_REQ_TYPES)
+			return NULL;
+		return requests[type];
+	}
+}