X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/ab9f1243f9579f7fe8b6eec6941979d4e1ed2aff..77493011a78df00e5ba285d56fa97c816c088ceb:/print-ascii.c

diff --git a/print-ascii.c b/print-ascii.c
index b2a78a03..2f05c387 100644
--- a/print-ascii.c
+++ b/print-ascii.c
@@ -40,35 +40,59 @@
 #include "config.h"
 #endif
 
-#ifdef HAVE_SYS_CDEFS_H
-#include <sys/cdefs.h>
-#endif
-#if 0
-#ifndef lint
-__RCSID("$NetBSD: print-ascii.c,v 1.1 1999/09/30 14:49:12 sjg Exp $");
-#endif
-#endif
+#include <tcpdump-stdinc.h>
 #include <stdio.h>
-#include <sys/types.h>
-#include <ctype.h>
 
+#include "netdissect.h"
 #include "interface.h"
 
+#define ASCII_LINELENGTH 300
 #define HEXDUMP_BYTES_PER_LINE 16
 #define HEXDUMP_SHORTS_PER_LINE (HEXDUMP_BYTES_PER_LINE / 2)
 #define HEXDUMP_HEXSTUFF_PER_SHORT 5 /* 4 hex digits and a space */
 #define HEXDUMP_HEXSTUFF_PER_LINE \
 		(HEXDUMP_HEXSTUFF_PER_SHORT * HEXDUMP_SHORTS_PER_LINE)
-     
+
+void
+ascii_print(register const u_char *cp, register u_int length)
+{
+	register int s;
+
+	putchar('\n');
+	while (length > 0) {
+		s = *cp++;
+		length--;
+		if (s == '\r') {
+			/*
+			 * Don't print CRs at the end of the line; they
+			 * don't belong at the ends of lines on UN*X,
+			 * and the standard I/O library will give us one
+			 * on Windows so we don't need to print one
+			 * ourselves.
+			 *
+			 * In the middle of a line, just print a '.'.
+			 */
+			if (length > 1 && *cp != '\n')
+				putchar('.');
+		} else {
+			if (!ND_ISGRAPH(s) &&
+			    (s != '\t' && s != ' ' && s != '\n'))
+				putchar('.');
+			else
+				putchar(s);
+		}
+	}
+}
+
 void
-ascii_print_with_offset(register const u_char *cp, register u_int length,
-			register u_int oset)
+hex_and_ascii_print_with_offset(netdissect_options *ndo, register const char *ident,
+    register const u_char *cp, register u_int length, register u_int oset)
 {
 	register u_int i;
 	register int s1, s2;
 	register int nshorts;
 	char hexstuff[HEXDUMP_SHORTS_PER_LINE*HEXDUMP_HEXSTUFF_PER_SHORT+1], *hsp;
-	char asciistuff[HEXDUMP_BYTES_PER_LINE+1], *asp;
+	char asciistuff[ASCII_LINELENGTH+1], *asp;
 
 	nshorts = length / sizeof(u_short);
 	i = 0;
@@ -76,46 +100,51 @@ ascii_print_with_offset(register const u_char *cp, register u_int length,
 	while (--nshorts >= 0) {
 		s1 = *cp++;
 		s2 = *cp++;
-		(void)sprintf(hsp, " %02x%02x", s1, s2);
+		(void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
+		    " %02x%02x", s1, s2);
 		hsp += HEXDUMP_HEXSTUFF_PER_SHORT;
-		*(asp++) = (isgraph(s1) ? s1 : '.');
-		*(asp++) = (isgraph(s2) ? s2 : '.');
-		if (++i >= HEXDUMP_SHORTS_PER_LINE) {
-		    *hsp = *asp = '\0';
-		    (void)printf("\n0x%04x\t%-*s\t%s",
-				 oset, HEXDUMP_HEXSTUFF_PER_LINE,
-				 hexstuff, asciistuff);
-		    i = 0; hsp = hexstuff; asp = asciistuff;
-		    oset += HEXDUMP_BYTES_PER_LINE;
+		*(asp++) = (ND_ISGRAPH(s1) ? s1 : '.');
+		*(asp++) = (ND_ISGRAPH(s2) ? s2 : '.');
+		i++;
+		if (i >= HEXDUMP_SHORTS_PER_LINE) {
+			*hsp = *asp = '\0';
+			ND_PRINT((ndo, "%s0x%04x: %-*s  %s",
+			    ident, oset, HEXDUMP_HEXSTUFF_PER_LINE,
+			    hexstuff, asciistuff));
+			i = 0; hsp = hexstuff; asp = asciistuff;
+			oset += HEXDUMP_BYTES_PER_LINE;
 		}
 	}
 	if (length & 1) {
 		s1 = *cp++;
-		(void)sprintf(hsp, " %02x", s1);
+		(void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
+		    " %02x", s1);
 		hsp += 3;
-		*(asp++) = (isgraph(s1) ? s1 : '.');
+		*(asp++) = (ND_ISGRAPH(s1) ? s1 : '.');
 		++i;
 	}
 	if (i > 0) {
 		*hsp = *asp = '\0';
-		(void)printf("\n0x%04x\t%-*s\t%s",
-			     oset, HEXDUMP_HEXSTUFF_PER_LINE,
-			     hexstuff, asciistuff);
+		ND_PRINT((ndo, "%s0x%04x: %-*s  %s",
+		     ident, oset, HEXDUMP_HEXSTUFF_PER_LINE,
+		     hexstuff, asciistuff));
 	}
 }
 
 void
-ascii_print(register const u_char *cp, register u_int length)
+hex_and_ascii_print(netdissect_options *ndo, register const char *ident,
+    register const u_char *cp, register u_int length)
 {
-	ascii_print_with_offset(cp, length, 0);
+	hex_and_ascii_print_with_offset(ndo, ident, cp, length, 0);
 }
-	
+
 /*
  * telnet_print() wants this.  It is essentially default_print_unaligned()
  */
 void
-hex_print_with_offset(register const u_char *cp, register u_int length,
-		      register u_int oset)
+hex_print_with_offset(netdissect_options *ndo,
+                      const char *ident, const u_char *cp, u_int length,
+		      u_int oset)
 {
 	register u_int i, s;
 	register int nshorts;
@@ -124,16 +153,16 @@ hex_print_with_offset(register const u_char *cp, register u_int length,
 	i = 0;
 	while (--nshorts >= 0) {
 		if ((i++ % 8) == 0) {
-			(void)printf("\n0x%04x\t", oset);
+			ND_PRINT((ndo,"%s0x%04x: ", ident, oset));
 			oset += HEXDUMP_BYTES_PER_LINE;
 		}
 		s = *cp++;
-		(void)printf(" %02x%02x", s, *cp++);
+		ND_PRINT((ndo," %02x%02x", s, *cp++));
 	}
 	if (length & 1) {
 		if ((i % 8) == 0)
-			(void)printf("\n0x%04x\t", oset);
-		(void)printf(" %02x", *cp);
+			ND_PRINT((ndo,"%s0x%04x: ", ident, oset));
+		ND_PRINT((ndo," %02x", *cp));
 	}
 }
 
@@ -141,21 +170,25 @@ hex_print_with_offset(register const u_char *cp, register u_int length,
  * just for completeness
  */
 void
-hex_print(register const u_char *cp, register u_int length)
+hex_print(netdissect_options *ndo,const char *ident, const u_char *cp, u_int length)
 {
-	hex_print_with_offset(cp, length, 0);
+  hex_print_with_offset(ndo, ident, cp, length, 0);
 }
 
 #ifdef MAIN
 int
 main(int argc, char *argv[])
 {
-	hex_print("Hello, World!\n", 14);
+	hex_print("\n\t", "Hello, World!\n", 14);
+	printf("\n");
+	hex_and_ascii_print("\n\t", "Hello, World!\n", 14);
 	printf("\n");
 	ascii_print("Hello, World!\n", 14);
 	printf("\n");
 #define TMSG "Now is the winter of our discontent...\n"
-	ascii_print_with_offset(TMSG, sizeof(TMSG) - 1, 0x100);
+	hex_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100);
+	printf("\n");
+	hex_and_ascii_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100);
 	printf("\n");
 	exit(0);
 }