Merge branch 'dev' into 'master'v1.0.1

支持CI

Closes #1

See merge request common_tools/tcpdump_mesa!1

1 files changed, 134 insertions, 0 deletions

diff --git a/src/print-loopback.c b/src/print-loopback.c
new file mode 100644
index 0000000..2d5fca5
--- /dev/null
+++ b/src/print-loopback.c
@@ -0,0 +1,134 @@
+/*
+ * This module implements decoding of the Loopback Protocol, originally
+ * defined as the Configuration Testing Protocol. It is based on the following
+ * specification:
+ * http://www.mit.edu/people/jhawk/ctp.pdf
+ *
+ * Copyright (c) 2014 The TCPDUMP project
+ * 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.
+ *
+ * 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 HOLDER 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 <netdissect-stdinc.h>
+
+#include "netdissect.h"
+#include "extract.h"
+#include "ether.h"
+#include "addrtoname.h"
+
+static const char tstr[] = " [|loopback]";
+
+#define LOOPBACK_REPLY   1
+#define LOOPBACK_FWDDATA 2
+
+static const struct tok fcode_str[] = {
+	{ LOOPBACK_REPLY,   "Reply"        },
+	{ LOOPBACK_FWDDATA, "Forward Data" },
+	{ 0, NULL }
+};
+
+static void
+loopback_message_print(netdissect_options *ndo, const u_char *cp, const u_int len)
+{
+	const u_char *ep = cp + len;
+	uint16_t function;
+
+	if (len < 2)
+		goto invalid;
+	/* function */
+	ND_TCHECK2(*cp, 2);
+	function = EXTRACT_LE_16BITS(cp);
+	cp += 2;
+	ND_PRINT((ndo, ", %s", tok2str(fcode_str, " invalid (%u)", function)));
+
+	switch (function) {
+		case LOOPBACK_REPLY:
+			if (len < 4)
+				goto invalid;
+			/* receipt number */
+			ND_TCHECK2(*cp, 2);
+			ND_PRINT((ndo, ", receipt number %u", EXTRACT_LE_16BITS(cp)));
+			cp += 2;
+			/* data */
+			ND_PRINT((ndo, ", data (%u octets)", len - 4));
+			ND_TCHECK2(*cp, len - 4);
+			break;
+		case LOOPBACK_FWDDATA:
+			if (len < 8)
+				goto invalid;
+			/* forwarding address */
+			ND_TCHECK2(*cp, ETHER_ADDR_LEN);
+			ND_PRINT((ndo, ", forwarding address %s", etheraddr_string(ndo, cp)));
+			cp += ETHER_ADDR_LEN;
+			/* data */
+			ND_PRINT((ndo, ", data (%u octets)", len - 8));
+			ND_TCHECK2(*cp, len - 8);
+			break;
+		default:
+			ND_TCHECK2(*cp, len - 2);
+			break;
+	}
+	return;
+
+invalid:
+	ND_PRINT((ndo, "%s", istr));
+	ND_TCHECK2(*cp, ep - cp);
+	return;
+trunc:
+	ND_PRINT((ndo, "%s", tstr));
+}
+
+void
+loopback_print(netdissect_options *ndo, const u_char *cp, const u_int len)
+{
+	const u_char *ep = cp + len;
+	uint16_t skipCount;
+
+	ND_PRINT((ndo, "Loopback"));
+	if (len < 2)
+		goto invalid;
+	/* skipCount */
+	ND_TCHECK2(*cp, 2);
+	skipCount = EXTRACT_LE_16BITS(cp);
+	cp += 2;
+	ND_PRINT((ndo, ", skipCount %u", skipCount));
+	if (skipCount % 8)
+		ND_PRINT((ndo, " (bogus)"));
+	if (skipCount > len - 2)
+		goto invalid;
+	loopback_message_print(ndo, cp + skipCount, len - 2 - skipCount);
+	return;
+
+invalid:
+	ND_PRINT((ndo, "%s", istr));
+	ND_TCHECK2(*cp, ep - cp);
+	return;
+trunc:
+	ND_PRINT((ndo, "%s", tstr));
+}
+