Adding upstream version 4.99.4.upstream/4.99.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 198 insertions, 0 deletions

diff --git a/print-tftp.c b/print-tftp.c
new file mode 100644
index 0000000..39fc696
--- /dev/null
+++ b/print-tftp.c
@@ -0,0 +1,198 @@
+/*
+ * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* \summary: Trivial File Transfer Protocol (TFTP) printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include "netdissect.h"
+#include "extract.h"
+
+/*
+ * Trivial File Transfer Protocol (IEN-133)
+ */
+
+/*
+ * Packet types.
+ */
+#define	RRQ	01			/* read request */
+#define	WRQ	02			/* write request */
+#define	DATA	03			/* data packet */
+#define	ACK	04			/* acknowledgement */
+#define	TFTP_ERROR	05			/* error code */
+#define OACK	06			/* option acknowledgement */
+
+/*
+ * Error codes.
+ */
+#define	EUNDEF		0		/* not defined */
+#define	ENOTFOUND	1		/* file not found */
+#define	EACCESS		2		/* access violation */
+#define	ENOSPACE	3		/* disk full or allocation exceeded */
+#define	EBADOP		4		/* illegal TFTP operation */
+#define	EBADID		5		/* unknown transfer ID */
+#define	EEXISTS		6		/* file already exists */
+#define	ENOUSER		7		/* no such user */
+
+
+/* op code to string mapping */
+static const struct tok op2str[] = {
+	{ RRQ,		"RRQ" },	/* read request */
+	{ WRQ,		"WRQ" },	/* write request */
+	{ DATA,		"DATA" },	/* data packet */
+	{ ACK,		"ACK" },	/* acknowledgement */
+	{ TFTP_ERROR,	"ERROR" },	/* error code */
+	{ OACK,		"OACK" },	/* option acknowledgement */
+	{ 0,		NULL }
+};
+
+/* error code to string mapping */
+static const struct tok err2str[] = {
+	{ EUNDEF,	"EUNDEF" },	/* not defined */
+	{ ENOTFOUND,	"ENOTFOUND" },	/* file not found */
+	{ EACCESS,	"EACCESS" },	/* access violation */
+	{ ENOSPACE,	"ENOSPACE" },	/* disk full or allocation exceeded */
+	{ EBADOP,	"EBADOP" },	/* illegal TFTP operation */
+	{ EBADID,	"EBADID" },	/* unknown transfer ID */
+	{ EEXISTS,	"EEXISTS" },	/* file already exists */
+	{ ENOUSER,	"ENOUSER" },	/* no such user */
+	{ 0,		NULL }
+};
+
+/*
+ * Print trivial file transfer program requests
+ */
+void
+tftp_print(netdissect_options *ndo,
+           const u_char *bp, u_int length)
+{
+	const char *cp;
+	u_int opcode;
+	u_int ui;
+
+	ndo->ndo_protocol = "tftp";
+
+	/* Print protocol */
+	nd_print_protocol_caps(ndo);
+	/* Print length */
+	ND_PRINT(", length %u", length);
+
+	/* Print tftp request type */
+	if (length < 2)
+		goto trunc;
+	opcode = GET_BE_U_2(bp);
+	cp = tok2str(op2str, "tftp-#%u", opcode);
+	ND_PRINT(", %s", cp);
+	/* Bail if bogus opcode */
+	if (*cp == 't')
+		return;
+	bp += 2;
+	length -= 2;
+
+	switch (opcode) {
+
+	case RRQ:
+	case WRQ:
+		if (length == 0)
+			goto trunc;
+		ND_PRINT(" ");
+		/* Print filename */
+		ND_PRINT("\"");
+		ui = nd_printztn(ndo, bp, length, ndo->ndo_snapend);
+		ND_PRINT("\"");
+		if (ui == 0)
+			goto trunc;
+		bp += ui;
+		length -= ui;
+
+		/* Print the mode - RRQ and WRQ only */
+		if (length == 0)
+			goto trunc;	/* no mode */
+		ND_PRINT(" ");
+		ui = nd_printztn(ndo, bp, length, ndo->ndo_snapend);
+		if (ui == 0)
+			goto trunc;
+		bp += ui;
+		length -= ui;
+
+		/* Print options, if any */
+		while (length != 0) {
+			if (GET_U_1(bp) != '\0')
+				ND_PRINT(" ");
+			ui = nd_printztn(ndo, bp, length, ndo->ndo_snapend);
+			if (ui == 0)
+				goto trunc;
+			bp += ui;
+			length -= ui;
+		}
+		break;
+
+	case OACK:
+		/* Print options */
+		while (length != 0) {
+			if (GET_U_1(bp) != '\0')
+				ND_PRINT(" ");
+			ui = nd_printztn(ndo, bp, length, ndo->ndo_snapend);
+			if (ui == 0)
+				goto trunc;
+			bp += ui;
+			length -= ui;
+		}
+		break;
+
+	case ACK:
+	case DATA:
+		if (length < 2)
+			goto trunc;	/* no block number */
+		ND_PRINT(" block %u", GET_BE_U_2(bp));
+		break;
+
+	case TFTP_ERROR:
+		/* Print error code string */
+		if (length < 2)
+			goto trunc;	/* no error code */
+		ND_PRINT(" %s", tok2str(err2str, "tftp-err-#%u \"",
+				       GET_BE_U_2(bp)));
+		bp += 2;
+		length -= 2;
+		/* Print error message string */
+		if (length == 0)
+			goto trunc;	/* no error message */
+		ND_PRINT(" \"");
+		ui = nd_printztn(ndo, bp, length, ndo->ndo_snapend);
+		ND_PRINT("\"");
+		if (ui == 0)
+			goto trunc;
+		break;
+
+	default:
+		/* We shouldn't get here */
+		ND_PRINT("(unknown #%u)", opcode);
+		break;
+	}
+	return;
+trunc:
+	nd_print_trunc(ndo);
+}