X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/f5fe14663d9ed32b7a995ed0924c04e705f74237..69ead2a09cf7d0666c6a7ac12e47fd9743242c61:/util-print.c

diff --git a/util-print.c b/util-print.c
index 469b8261..113f7846 100644
--- a/util-print.c
+++ b/util-print.c
@@ -46,6 +46,7 @@
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
 #endif
+#include <ctype.h>
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
@@ -56,6 +57,8 @@
 #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
@@ -65,6 +68,23 @@ int32_t thiszone;		/* seconds offset from gmt to local time */
 
 #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.
@@ -524,7 +544,6 @@ mask2plen(uint32_t mask)
 	return (prefix_len);
 }
 
-#ifdef INET6
 int
 mask62plen(const u_char *mask)
 {
@@ -551,7 +570,6 @@ mask62plen(const u_char *mask)
 	}
 	return (cidr_len);
 }
-#endif /* INET6 */
 
 /*
  * Routine to print out information for text-based protocols such as FTP,
@@ -765,7 +783,7 @@ txtproto_print(netdissect_options *ndo, const u_char *pptr, u_int len,
 
 	/* Capitalize the protocol name */
 	for (pnp = protoname; *pnp != '\0'; pnp++)
-		ND_PRINT((ndo, "%c", toupper(*pnp)));
+		ND_PRINT((ndo, "%c", toupper((u_char)*pnp)));
 
 	if (is_reqresp) {
 		/*