X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/e2982e7f6f0b624a773ec5a58885ee80fab46d34..refs/pull/1034/head:/print-null.c

diff --git a/print-null.c b/print-null.c
index 27e8e4dc..a1b03f86 100644
--- a/print-null.c
+++ b/print-null.c
@@ -22,16 +22,17 @@
 /* \summary: BSD loopback device printer */
 
 #ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
 #endif
 
-#include <netdissect-stdinc.h>
-
-#include <string.h>
+#include "netdissect-stdinc.h"
 
+#define ND_LONGJMP_FROM_TCHECK
 #include "netdissect.h"
+#include "extract.h"
 #include "af.h"
 
+
 /*
  * The DLT_NULL packet header is 4 bytes long. It contains a host-byte-order
  * 32-bit integer that specifies the family, e.g. AF_INET.
@@ -52,8 +53,8 @@
 #define	SWAPLONG(y) \
 ((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))
 
-static inline void
-null_hdr_print(netdissect_options *ndo, u_int family, u_int length)
+static void
+null_hdr_print(netdissect_options *ndo, uint32_t family, u_int length)
 {
 	if (!ndo->ndo_qflag) {
 		ND_PRINT("AF %s (%u)",
@@ -72,19 +73,18 @@ null_hdr_print(netdissect_options *ndo, u_int family, u_int length)
  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
  * is the number of bytes actually captured.
  */
-u_int
+void
 null_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
 {
 	u_int length = h->len;
 	u_int caplen = h->caplen;
-	u_int family;
+	uint32_t family;
 
-	if (caplen < NULL_HDRLEN) {
-		ND_PRINT("[|null]");
-		return (NULL_HDRLEN);
-	}
+	ndo->ndo_protocol = "null";
+	ND_TCHECK_LEN(p, NULL_HDRLEN);
+	ndo->ndo_ll_hdr_len += NULL_HDRLEN;
 
-	memcpy((char *)&family, (const char *)p, sizeof(family));
+	family = GET_HE_U_4(p);
 
 	/*
 	 * This isn't necessarily in our host byte order; if this is
@@ -135,13 +135,4 @@ null_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char
 		if (!ndo->ndo_suppress_default_print)
 			ND_DEFAULTPRINT(p, caplen);
 	}
-
-	return (NULL_HDRLEN);
 }
-
-/*
- * Local Variables:
- * c-style: whitesmith
- * c-basic-offset: 8
- * End:
- */