tcpdump: Update to FreeBSD head 2017-04-04

Update tcpdump from Git mirror commit
99a648a912e81e29d9c4c159cbbe263462f2d719 to
642b174daddbd0efd9bb5f242c43f4ab4db6869f.

1 files changed, 946 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/util-print.c b/freebsd/contrib/tcpdump/util-print.c
new file mode 100644
index 00000000..63ca91a1
--- /dev/null
+++ b/freebsd/contrib/tcpdump/util-print.c
@@ -0,0 +1,946 @@
+#include <machine/rtems-bsd-user-space.h>
+#ifdef __rtems__
+#include <machine/rtems-bsd-program.h>
+#include "rtems-bsd-tcpdump-namespace.h"
+#endif /* __rtems__ */
+/*
+ * 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.
+ */
+
+/*
+ * txtproto_print() derived from original code by Hannes Gredler
+ * (hannes@juniper.net):
+ *
+ * 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, and (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.
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <netdissect-stdinc.h>
+
+#include <sys/stat.h>
+
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <ctype.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "netdissect.h"
+#include "ascii_strcasecmp.h"
+#include "timeval-operations.h"
+
+int32_t thiszone;		/* seconds offset from gmt to local time */
+/* invalid string to print '(invalid)' for malformed or corrupted packets */
+const char istr[] = " (invalid)";
+
+/*
+ * timestamp display buffer size, the biggest size of both formats is needed
+ * sizeof("0000000000.000000000") > sizeof("00:00:00.000000000")
+ */
+#define TS_BUF_SIZE sizeof("0000000000.000000000")
+
+#define TOKBUFSIZE 128
+
+/*
+ * Print out a character, filtering out the non-printable ones
+ */
+void
+fn_print_char(netdissect_options *ndo, u_char c)
+{
+	if (!ND_ISASCII(c)) {
+		c = ND_TOASCII(c);
+		ND_PRINT((ndo, "M-"));
+	}
+	if (!ND_ISPRINT(c)) {
+		c ^= 0x40;	/* DEL to ?, others to alpha */
+		ND_PRINT((ndo, "^"));
+	}
+	ND_PRINT((ndo, "%c", c));
+}
+
+/*
+ * Print out a null-terminated filename (or other ascii string).
+ * If ep is NULL, assume no truncation check is needed.
+ * Return true if truncated.
+ * Stop at ep (if given) or before the null char, whichever is first.
+ */
+int
+fn_print(netdissect_options *ndo,
+         register const u_char *s, register const u_char *ep)
+{
+	register int ret;
+	register u_char c;
+
+	ret = 1;			/* assume truncated */
+	while (ep == NULL || s < ep) {
+		c = *s++;
+		if (c == '\0') {
+			ret = 0;
+			break;
+		}
+		if (!ND_ISASCII(c)) {
+			c = ND_TOASCII(c);
+			ND_PRINT((ndo, "M-"));
+		}
+		if (!ND_ISPRINT(c)) {
+			c ^= 0x40;	/* DEL to ?, others to alpha */
+			ND_PRINT((ndo, "^"));
+		}
+		ND_PRINT((ndo, "%c", c));
+	}
+	return(ret);
+}
+
+/*
+ * Print out a null-terminated filename (or other ascii string) from
+ * a fixed-length buffer.
+ * If ep is NULL, assume no truncation check is needed.
+ * Return the number of bytes of string processed, including the
+ * terminating null, if not truncated.  Return 0 if truncated.
+ */
+u_int
+fn_printztn(netdissect_options *ndo,
+         register const u_char *s, register u_int n, register const u_char *ep)
+{
+	register u_int bytes;
+	register u_char c;
+
+	bytes = 0;
+	for (;;) {
+		if (n == 0 || (ep != NULL && s >= ep)) {
+			/*
+			 * Truncated.  This includes "no null before we
+			 * got to the end of the fixed-length buffer".
+			 *
+			 * XXX - BOOTP says "null-terminated", which
+			 * means the maximum length of the string, in
+			 * bytes, is 1 less than the size of the buffer,
+			 * as there must always be a terminating null.
+			 */
+			bytes = 0;
+			break;
+		}
+
+		c = *s++;
+		bytes++;
+		n--;
+		if (c == '\0') {
+			/* End of string */
+			break;
+		}
+		if (!ND_ISASCII(c)) {
+			c = ND_TOASCII(c);
+			ND_PRINT((ndo, "M-"));
+		}
+		if (!ND_ISPRINT(c)) {
+			c ^= 0x40;	/* DEL to ?, others to alpha */
+			ND_PRINT((ndo, "^"));
+		}
+		ND_PRINT((ndo, "%c", c));
+	}
+	return(bytes);
+}
+
+/*
+ * Print out a counted filename (or other ascii string).
+ * If ep is NULL, assume no truncation check is needed.
+ * Return true if truncated.
+ * Stop at ep (if given) or after n bytes, whichever is first.
+ */
+int
+fn_printn(netdissect_options *ndo,
+          register const u_char *s, register u_int n, register const u_char *ep)
+{
+	register u_char c;
+
+	while (n > 0 && (ep == NULL || s < ep)) {
+		n--;
+		c = *s++;
+		if (!ND_ISASCII(c)) {
+			c = ND_TOASCII(c);
+			ND_PRINT((ndo, "M-"));
+		}
+		if (!ND_ISPRINT(c)) {
+			c ^= 0x40;	/* DEL to ?, others to alpha */
+			ND_PRINT((ndo, "^"));
+		}
+		ND_PRINT((ndo, "%c", c));
+	}
+	return (n == 0) ? 0 : 1;
+}
+
+/*
+ * Print out a null-padded filename (or other ascii string).
+ * If ep is NULL, assume no truncation check is needed.
+ * Return true if truncated.
+ * Stop at ep (if given) or after n bytes or before the null char,
+ * whichever is first.
+ */
+int
+fn_printzp(netdissect_options *ndo,
+           register const u_char *s, register u_int n,
+           register const u_char *ep)
+{
+	register int ret;
+	register u_char c;
+
+	ret = 1;			/* assume truncated */
+	while (n > 0 && (ep == NULL || s < ep)) {
+		n--;
+		c = *s++;
+		if (c == '\0') {
+			ret = 0;
+			break;
+		}
+		if (!ND_ISASCII(c)) {
+			c = ND_TOASCII(c);
+			ND_PRINT((ndo, "M-"));
+		}
+		if (!ND_ISPRINT(c)) {
+			c ^= 0x40;	/* DEL to ?, others to alpha */
+			ND_PRINT((ndo, "^"));
+		}
+		ND_PRINT((ndo, "%c", c));
+	}
+	return (n == 0) ? 0 : ret;
+}
+
+/*
+ * Format the timestamp
+ */
+static char *
+ts_format(netdissect_options *ndo
+#ifndef HAVE_PCAP_SET_TSTAMP_PRECISION
+_U_
+#endif
+, int sec, int usec, char *buf)
+{
+	const char *format;
+
+#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
+	switch (ndo->ndo_tstamp_precision) {
+
+	case PCAP_TSTAMP_PRECISION_MICRO:
+		format = "%02d:%02d:%02d.%06u";
+		break;
+
+	case PCAP_TSTAMP_PRECISION_NANO:
+		format = "%02d:%02d:%02d.%09u";
+		break;
+
+	default:
+		format = "%02d:%02d:%02d.{unknown}";
+		break;
+	}
+#else
+	format = "%02d:%02d:%02d.%06u";
+#endif
+
+	snprintf(buf, TS_BUF_SIZE, format,
+                 sec / 3600, (sec % 3600) / 60, sec % 60, usec);
+
+        return buf;
+}
+
+/*
+ * Format the timestamp - Unix timeval style
+ */
+static char *
+ts_unix_format(netdissect_options *ndo
+#ifndef HAVE_PCAP_SET_TSTAMP_PRECISION
+_U_
+#endif
+, int sec, int usec, char *buf)
+{
+	const char *format;
+
+#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
+	switch (ndo->ndo_tstamp_precision) {
+
+	case PCAP_TSTAMP_PRECISION_MICRO:
+		format = "%u.%06u";
+		break;
+
+	case PCAP_TSTAMP_PRECISION_NANO:
+		format = "%u.%09u";
+		break;
+
+	default:
+		format = "%u.{unknown}";
+		break;
+	}
+#else
+	format = "%u.%06u";
+#endif
+
+	snprintf(buf, TS_BUF_SIZE, format,
+		 (unsigned)sec, (unsigned)usec);
+
+	return buf;
+}
+
+/*
+ * Print the timestamp
+ */
+void
+ts_print(netdissect_options *ndo,
+         register const struct timeval *tvp)
+{
+	register int s;
+	struct tm *tm;
+	time_t Time;
+	char buf[TS_BUF_SIZE];
+	static struct timeval tv_ref;
+	struct timeval tv_result;
+	int negative_offset;
+	int nano_prec;
+
+	switch (ndo->ndo_tflag) {
+
+	case 0: /* Default */
+		s = (tvp->tv_sec + thiszone) % 86400;
+		ND_PRINT((ndo, "%s ", ts_format(ndo, s, tvp->tv_usec, buf)));
+		break;
+
+	case 1: /* No time stamp */
+		break;
+
+	case 2: /* Unix timeval style */
+		ND_PRINT((ndo, "%s ", ts_unix_format(ndo,
+			  tvp->tv_sec, tvp->tv_usec, buf)));
+		break;
+
+	case 3: /* Microseconds/nanoseconds since previous packet */
+        case 5: /* Microseconds/nanoseconds since first packet */
+#ifdef HAVE_PCAP_SET_TSTAMP_PRECISION
+		switch (ndo->ndo_tstamp_precision) {
+		case PCAP_TSTAMP_PRECISION_MICRO:
+			nano_prec = 0;
+			break;
+		case PCAP_TSTAMP_PRECISION_NANO:
+			nano_prec = 1;
+			break;
+		default:
+			nano_prec = 0;
+			break;
+		}
+#else
+		nano_prec = 0;
+#endif
+		if (!(netdissect_timevalisset(&tv_ref)))
+			tv_ref = *tvp; /* set timestamp for first packet */
+
+		negative_offset = netdissect_timevalcmp(tvp, &tv_ref, <);
+		if (negative_offset)
+			netdissect_timevalsub(&tv_ref, tvp, &tv_result, nano_prec);
+		else
+			netdissect_timevalsub(tvp, &tv_ref, &tv_result, nano_prec);
+
+		ND_PRINT((ndo, (negative_offset ? "-" : " ")));
+
+		ND_PRINT((ndo, "%s ", ts_format(ndo,
+			  tv_result.tv_sec, tv_result.tv_usec, buf)));
+
+                if (ndo->ndo_tflag == 3)
+			tv_ref = *tvp; /* set timestamp for previous packet */
+		break;
+
+	case 4: /* Default + Date */
+		s = (tvp->tv_sec + thiszone) % 86400;
+		Time = (tvp->tv_sec + thiszone) - s;
+		tm = gmtime (&Time);
+		if (!tm)
+			ND_PRINT((ndo, "Date fail  "));
+		else
+			ND_PRINT((ndo, "%04d-%02d-%02d %s ",
+                               tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
+                               ts_format(ndo, s, tvp->tv_usec, buf)));
+		break;
+	}
+}
+
+/*
+ * Print an unsigned relative number of seconds (e.g. hold time, prune timer)
+ * in the form 5m1s.  This does no truncation, so 32230861 seconds
+ * is represented as 1y1w1d1h1m1s.
+ */
+void
+unsigned_relts_print(netdissect_options *ndo,
+                     uint32_t secs)
+{
+	static const char *lengths[] = {"y", "w", "d", "h", "m", "s"};
+	static const u_int seconds[] = {31536000, 604800, 86400, 3600, 60, 1};
+	const char **l = lengths;
+	const u_int *s = seconds;
+
+	if (secs == 0) {
+		ND_PRINT((ndo, "0s"));
+		return;
+	}
+	while (secs > 0) {
+		if (secs >= *s) {
+			ND_PRINT((ndo, "%d%s", secs / *s, *l));
+			secs -= (secs / *s) * *s;
+		}
+		s++;
+		l++;
+	}
+}
+
+/*
+ * Print a signed relative number of seconds (e.g. hold time, prune timer)
+ * in the form 5m1s.  This does no truncation, so 32230861 seconds
+ * is represented as 1y1w1d1h1m1s.
+ */
+void
+signed_relts_print(netdissect_options *ndo,
+                   int32_t secs)
+{
+	if (secs < 0) {
+		ND_PRINT((ndo, "-"));
+		if (secs == INT32_MIN) {
+			/*
+			 * -2^31; you can't fit its absolute value into
+			 * a 32-bit signed integer.
+			 *
+			 * Just directly pass said absolute value to
+			 * unsigned_relts_print() directly.
+			 *
+			 * (XXX - does ISO C guarantee that -(-2^n),
+			 * when calculated and cast to an n-bit unsigned
+			 * integer type, will have the value 2^n?)
+			 */
+			unsigned_relts_print(ndo, 2147483648U);
+		} else {
+			/*
+			 * We now know -secs will fit into an int32_t;
+			 * negate it and pass that to unsigned_relts_print().
+			 */
+			unsigned_relts_print(ndo, -secs);
+		}
+		return;
+	}
+	unsigned_relts_print(ndo, secs);
+}
+
+/*
+ *  this is a generic routine for printing unknown data;
+ *  we pass on the linefeed plus indentation string to
+ *  get a proper output - returns 0 on error
+ */
+
+int
+print_unknown_data(netdissect_options *ndo, const u_char *cp,const char *ident,int len)
+{
+	if (len < 0) {
+          ND_PRINT((ndo,"%sDissector error: print_unknown_data called with negative length",
+		    ident));
+		return(0);
+	}
+	if (ndo->ndo_snapend - cp < len)
+		len = ndo->ndo_snapend - cp;
+	if (len < 0) {
+          ND_PRINT((ndo,"%sDissector error: print_unknown_data called with pointer past end of packet",
+		    ident));
+		return(0);
+	}
+        hex_print(ndo, ident,cp,len);
+	return(1); /* everything is ok */
+}
+
+/*
+ * Convert a token value to a string; use "fmt" if not found.
+ */
+const char *
+tok2strbuf(register const struct tok *lp, register const char *fmt,
+	   register u_int v, char *buf, size_t bufsize)
+{
+	if (lp != NULL) {
+		while (lp->s != NULL) {
+			if (lp->v == v)
+				return (lp->s);
+			++lp;
+		}
+	}
+	if (fmt == NULL)
+		fmt = "#%d";
+
+	(void)snprintf(buf, bufsize, fmt, v);
+	return (const char *)buf;
+}
+
+/*
+ * Convert a token value to a string; use "fmt" if not found.
+ */
+const char *
+tok2str(register const struct tok *lp, register const char *fmt,
+	register u_int v)
+{
+	static char buf[4][TOKBUFSIZE];
+	static int idx = 0;
+	char *ret;
+
+	ret = buf[idx];
+	idx = (idx+1) & 3;
+	return tok2strbuf(lp, fmt, v, ret, sizeof(buf[0]));
+}
+
+/*
+ * Convert a bit token value to a string; use "fmt" if not found.
+ * this is useful for parsing bitfields, the output strings are seperated
+ * if the s field is positive.
+ */
+static char *
+bittok2str_internal(register const struct tok *lp, register const char *fmt,
+	   register u_int v, const char *sep)
+{
+        static char buf[256]; /* our stringbuffer */
+        int buflen=0;
+        register u_int rotbit; /* this is the bit we rotate through all bitpositions */
+        register u_int tokval;
+        const char * sepstr = "";
+
+	while (lp != NULL && lp->s != NULL) {
+            tokval=lp->v;   /* load our first value */
+            rotbit=1;
+            while (rotbit != 0) {
+                /*
+                 * lets AND the rotating bit with our token value
+                 * and see if we have got a match
+                 */
+		if (tokval == (v&rotbit)) {
+                    /* ok we have found something */
+                    buflen+=snprintf(buf+buflen, sizeof(buf)-buflen, "%s%s",
+                                     sepstr, lp->s);
+                    sepstr = sep;
+                    break;
+                }
+                rotbit=rotbit<<1; /* no match - lets shift and try again */
+            }
+            lp++;
+	}
+
+        if (buflen == 0)
+            /* bummer - lets print the "unknown" message as advised in the fmt string if we got one */
+            (void)snprintf(buf, sizeof(buf), fmt == NULL ? "#%08x" : fmt, v);
+        return (buf);
+}
+
+/*
+ * Convert a bit token value to a string; use "fmt" if not found.
+ * this is useful for parsing bitfields, the output strings are not seperated.
+ */
+char *
+bittok2str_nosep(register const struct tok *lp, register const char *fmt,
+	   register u_int v)
+{
+    return (bittok2str_internal(lp, fmt, v, ""));
+}
+
+/*
+ * Convert a bit token value to a string; use "fmt" if not found.
+ * this is useful for parsing bitfields, the output strings are comma seperated.
+ */
+char *
+bittok2str(register const struct tok *lp, register const char *fmt,
+	   register u_int v)
+{
+    return (bittok2str_internal(lp, fmt, v, ", "));
+}
+
+/*
+ * Convert a value to a string using an array; the macro
+ * tok2strary() in <netdissect.h> is the public interface to
+ * this function and ensures that the second argument is
+ * correct for bounds-checking.
+ */
+const char *
+tok2strary_internal(register const char **lp, int n, register const char *fmt,
+	register int v)
+{
+	static char buf[TOKBUFSIZE];
+
+	if (v >= 0 && v < n && lp[v] != NULL)
+		return lp[v];
+	if (fmt == NULL)
+		fmt = "#%d";
+	(void)snprintf(buf, sizeof(buf), fmt, v);
+	return (buf);
+}
+
+/*
+ * Convert a 32-bit netmask to prefixlen if possible
+ * the function returns the prefix-len; if plen == -1
+ * then conversion was not possible;
+ */
+
+int
+mask2plen(uint32_t mask)
+{
+	uint32_t bitmasks[33] = {
+		0x00000000,
+		0x80000000, 0xc0000000, 0xe0000000, 0xf0000000,
+		0xf8000000, 0xfc000000, 0xfe000000, 0xff000000,
+		0xff800000, 0xffc00000, 0xffe00000, 0xfff00000,
+		0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000,
+		0xffff8000, 0xffffc000, 0xffffe000, 0xfffff000,
+		0xfffff800, 0xfffffc00, 0xfffffe00, 0xffffff00,
+		0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0,
+		0xfffffff8, 0xfffffffc, 0xfffffffe, 0xffffffff
+	};
+	int prefix_len = 32;
+
+	/* let's see if we can transform the mask into a prefixlen */
+	while (prefix_len >= 0) {
+		if (bitmasks[prefix_len] == mask)
+			break;
+		prefix_len--;
+	}
+	return (prefix_len);
+}
+
+int
+mask62plen(const u_char *mask)
+{
+	u_char bitmasks[9] = {
+		0x00,
+		0x80, 0xc0, 0xe0, 0xf0,
+		0xf8, 0xfc, 0xfe, 0xff
+	};
+	int byte;
+	int cidr_len = 0;
+
+	for (byte = 0; byte < 16; byte++) {
+		u_int bits;
+
+		for (bits = 0; bits < (sizeof (bitmasks) / sizeof (bitmasks[0])); bits++) {
+			if (mask[byte] == bitmasks[bits]) {
+				cidr_len += bits;
+				break;
+			}
+		}
+
+		if (mask[byte] != 0xff)
+			break;
+	}
+	return (cidr_len);
+}
+
+/*
+ * Routine to print out information for text-based protocols such as FTP,
+ * HTTP, SMTP, RTSP, SIP, ....
+ */
+#define MAX_TOKEN	128
+
+/*
+ * Fetch a token from a packet, starting at the specified index,
+ * and return the length of the token.
+ *
+ * Returns 0 on error; yes, this is indistinguishable from an empty
+ * token, but an "empty token" isn't a valid token - it just means
+ * either a space character at the beginning of the line (this
+ * includes a blank line) or no more tokens remaining on the line.
+ */
+static int
+fetch_token(netdissect_options *ndo, const u_char *pptr, u_int idx, u_int len,
+    u_char *tbuf, size_t tbuflen)
+{
+	size_t toklen = 0;
+
+	for (; idx < len; idx++) {
+		if (!ND_TTEST(*(pptr + idx))) {
+			/* ran past end of captured data */
+			return (0);
+		}
+		if (!isascii(*(pptr + idx))) {
+			/* not an ASCII character */
+			return (0);
+		}
+		if (isspace(*(pptr + idx))) {
+			/* end of token */
+			break;
+		}
+		if (!isprint(*(pptr + idx))) {
+			/* not part of a command token or response code */
+			return (0);
+		}
+		if (toklen + 2 > tbuflen) {
+			/* no room for this character and terminating '\0' */
+			return (0);
+		}
+		tbuf[toklen] = *(pptr + idx);
+		toklen++;
+	}
+	if (toklen == 0) {
+		/* no token */
+		return (0);
+	}
+	tbuf[toklen] = '\0';
+
+	/*
+	 * Skip past any white space after the token, until we see
+	 * an end-of-line (CR or LF).
+	 */
+	for (; idx < len; idx++) {
+		if (!ND_TTEST(*(pptr + idx))) {
+			/* ran past end of captured data */
+			break;
+		}
+		if (*(pptr + idx) == '\r' || *(pptr + idx) == '\n') {
+			/* end of line */
+			break;
+		}
+		if (!isascii(*(pptr + idx)) || !isprint(*(pptr + idx))) {
+			/* not a printable ASCII character */
+			break;
+		}
+		if (!isspace(*(pptr + idx))) {
+			/* beginning of next token */
+			break;
+		}
+	}
+	return (idx);
+}
+
+/*
+ * Scan a buffer looking for a line ending - LF or CR-LF.
+ * Return the index of the character after the line ending or 0 if
+ * we encounter a non-ASCII or non-printable character or don't find
+ * the line ending.
+ */
+static u_int
+print_txt_line(netdissect_options *ndo, const char *protoname,
+    const char *prefix, const u_char *pptr, u_int idx, u_int len)
+{
+	u_int startidx;
+	u_int linelen;
+
+	startidx = idx;
+	while (idx < len) {
+		ND_TCHECK(*(pptr+idx));
+		if (*(pptr+idx) == '\n') {
+			/*
+			 * LF without CR; end of line.
+			 * Skip the LF and print the line, with the
+			 * exception of the LF.
+			 */
+			linelen = idx - startidx;
+			idx++;
+			goto print;
+		} else if (*(pptr+idx) == '\r') {
+			/* CR - any LF? */
+			if ((idx+1) >= len) {
+				/* not in this packet */
+				return (0);
+			}
+			ND_TCHECK(*(pptr+idx+1));
+			if (*(pptr+idx+1) == '\n') {
+				/*
+				 * CR-LF; end of line.
+				 * Skip the CR-LF and print the line, with
+				 * the exception of the CR-LF.
+				 */
+				linelen = idx - startidx;
+				idx += 2;
+				goto print;
+			}
+
+			/*
+			 * CR followed by something else; treat this
+			 * as if it were binary data, and don't print
+			 * it.
+			 */
+			return (0);
+		} else if (!isascii(*(pptr+idx)) ||
+		    (!isprint(*(pptr+idx)) && *(pptr+idx) != '\t')) {
+			/*
+			 * Not a printable ASCII character and not a tab;
+			 * treat this as if it were binary data, and
+			 * don't print it.
+			 */
+			return (0);
+		}
+		idx++;
+	}
+
+	/*
+	 * All printable ASCII, but no line ending after that point
+	 * in the buffer; treat this as if it were truncated.
+	 */
+trunc:
+	linelen = idx - startidx;
+	ND_PRINT((ndo, "%s%.*s[!%s]", prefix, (int)linelen, pptr + startidx,
+	    protoname));
+	return (0);
+
+print:
+	ND_PRINT((ndo, "%s%.*s", prefix, (int)linelen, pptr + startidx));
+	return (idx);
+}
+
+void
+txtproto_print(netdissect_options *ndo, const u_char *pptr, u_int len,
+    const char *protoname, const char **cmds, u_int flags)
+{
+	u_int idx, eol;
+	u_char token[MAX_TOKEN+1];
+	const char *cmd;
+	int is_reqresp = 0;
+	const char *pnp;
+
+	if (cmds != NULL) {
+		/*
+		 * This protocol has more than just request and
+		 * response lines; see whether this looks like a
+		 * request or response.
+		 */
+		idx = fetch_token(ndo, pptr, 0, len, token, sizeof(token));
+		if (idx != 0) {
+			/* Is this a valid request name? */
+			while ((cmd = *cmds++) != NULL) {
+				if (ascii_strcasecmp((const char *)token, cmd) == 0) {
+					/* Yes. */
+					is_reqresp = 1;
+					break;
+				}
+			}
+
+			/*
+			 * No - is this a valid response code (3 digits)?
+			 *
+			 * Is this token the response code, or is the next
+			 * token the response code?
+			 */
+			if (flags & RESP_CODE_SECOND_TOKEN) {
+				/*
+				 * Next token - get it.
+				 */
+				idx = fetch_token(ndo, pptr, idx, len, token,
+				    sizeof(token));
+			}
+			if (idx != 0) {
+				if (isdigit(token[0]) && isdigit(token[1]) &&
+				    isdigit(token[2]) && token[3] == '\0') {
+					/* Yes. */
+					is_reqresp = 1;
+				}
+			}
+		}
+	} else {
+		/*
+		 * This protocol has only request and response lines
+		 * (e.g., FTP, where all the data goes over a
+		 * different connection); assume the payload is
+		 * a request or response.
+		 */
+		is_reqresp = 1;
+	}
+
+	/* Capitalize the protocol name */
+	for (pnp = protoname; *pnp != '\0'; pnp++)
+		ND_PRINT((ndo, "%c", toupper((u_char)*pnp)));
+
+	if (is_reqresp) {
+		/*
+		 * In non-verbose mode, just print the protocol, followed
+		 * by the first line as the request or response info.
+		 *
+		 * In verbose mode, print lines as text until we run out
+		 * of characters or see something that's not a
+		 * printable-ASCII line.
+		 */
+		if (ndo->ndo_vflag) {
+			/*
+			 * We're going to print all the text lines in the
+			 * request or response; just print the length
+			 * on the first line of the output.
+			 */
+			ND_PRINT((ndo, ", length: %u", len));
+			for (idx = 0;
+			    idx < len && (eol = print_txt_line(ndo, protoname, "\n\t", pptr, idx, len)) != 0;
+			    idx = eol)
+				;
+		} else {
+			/*
+			 * Just print the first text line.
+			 */
+			print_txt_line(ndo, protoname, ": ", pptr, 0, len);
+		}
+	}
+}
+
+void
+safeputs(netdissect_options *ndo,
+         const u_char *s, const u_int maxlen)
+{
+	u_int idx = 0;
+
+	while (*s && idx < maxlen) {
+		safeputchar(ndo, *s);
+		idx++;
+		s++;
+	}
+}
+
+void
+safeputchar(netdissect_options *ndo,
+            const u_char c)
+{
+	ND_PRINT((ndo, (c < 0x80 && ND_ISPRINT(c)) ? "%c" : "\\0x%02x", c));
+}
+
+#ifdef LBL_ALIGN
+/*
+ * Some compilers try to optimize memcpy(), using the alignment constraint
+ * on the argument pointer type.  by using this function, we try to avoid the
+ * optimization.
+ */
+void
+unaligned_memcpy(void *p, const void *q, size_t l)
+{
+	memcpy(p, q, l);
+}
+
+/* As with memcpy(), so with memcmp(). */
+int
+unaligned_memcmp(const void *p, const void *q, size_t l)
+{
+	return (memcmp(p, q, l));
+}
+#endif
+
+#ifdef __rtems__
+#include "rtems-bsd-tcpdump-util-print-data.h"
+#endif /* __rtems__ */