X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/c9d84d15c5c4dc8eca7594101fe5026080ed641e..c39d40a767a1ae36171e5bcbf6f157ff3e80fb6c:/print-rt6.c

diff --git a/print-rt6.c b/print-rt6.c
index 39c09b3d..096a9628 100644
--- a/print-rt6.c
+++ b/print-rt6.c
@@ -19,98 +19,97 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
-#ifndef lint
-static const char rcsid[] =
-    "@(#) /master/usr.sbin/tcpdump/tcpdump/print-icmp.c,v 2.1 1995/02/03 18:14:42 polk Exp (LBL)";
+/* \summary: IPv6 routing header printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
 #endif
 
-#ifdef INET6
+#include "netdissect-stdinc.h"
 
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/socket.h>
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
 
-#include <net/if.h>
+#include "ip6.h"
 
-#include <netinet/in.h>
-#include <netinet/if_ether.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_icmp.h>
-#include <netinet/ip_var.h>
-#include <netinet/udp.h>
-#include <netinet/udp_var.h>
-#include <netinet/tcp.h>
+int
+rt6_print(netdissect_options *ndo, const u_char *bp, const u_char *bp2 _U_)
+{
+	const struct ip6_rthdr *dp;
+	const struct ip6_rthdr0 *dp0;
+	const struct ip6_srh *srh;
+	u_int i, len, type;
+	const u_char *p;
 
-#include <stdio.h>
+	ndo->ndo_protocol = "rt6";
 
-#include <netinet/ip6.h>
+	nd_print_protocol_caps(ndo);
+	dp = (const struct ip6_rthdr *)bp;
 
-#include "interface.h"
-#include "addrtoname.h"
+	len = GET_U_1(dp->ip6r_len);
+	ND_PRINT(" (len=%u", len);	/*)*/
+	type = GET_U_1(dp->ip6r_type);
+	ND_PRINT(", type=%u", type);
+	if (type == IPV6_RTHDR_TYPE_0)
+		ND_PRINT(" [Deprecated]");
+	ND_PRINT(", segleft=%u", GET_U_1(dp->ip6r_segleft));
 
-int
-rt6_print(register const u_char *bp, register const u_char *bp2)
-{
-	register const struct ip6_rthdr0 *dp;
-	register const struct ip6_hdr *ip;
-	register const u_char *ep;
-	u_long bitmap = 0x0800;
-	u_long slmap;
-	int i, len;
-
-#if 0
-#define TCHECK(var) if ((u_char *)&(var) >= ep - sizeof(var)) goto trunc
-#endif
+	switch (type) {
+	case IPV6_RTHDR_TYPE_0:
+	case IPV6_RTHDR_TYPE_2:			/* Mobile IPv6 ID-20 */
+		dp0 = (const struct ip6_rthdr0 *)dp;
 
-	dp = (struct ip6_rthdr0 *)bp;
-	ip = (struct ip6_hdr *)bp2;
-	len = dp->ip6r0_len;
-
-	/* 'ep' points to the end of avaible data. */
-	ep = snapend;
-
-        printf("%s > %s: ",
-	       ip6addr_string(&ip->ip6_src),
-	       ip6addr_string(&ip->ip6_dst));
-	
-	TCHECK(dp->ip6r0_slmap[2]);
-	printf("srcrt (len=%d, ", dp->ip6r0_len);
-	printf("type=%d, ", dp->ip6r0_type);
-	printf("segleft=%d, ", dp->ip6r0_segleft);
-	if (dp->ip6r0_type != 0)
-		goto trunc;
-	slmap = (dp->ip6r0_slmap[0] << 16)
-	      | (dp->ip6r0_slmap[1] <<  8)
-	      | (dp->ip6r0_slmap[2]);
-	printf("bitmap=");
-	for (i = 24; i > 0; i--) {
-		if (slmap & bitmap)
-			printf("S");
-		else
-			printf("L");
-		bitmap >>= 1;
-	}
-	if (len % 2 == 1)
-		goto trunc;
-	len >>= 1;
-	printf(", ");
-	for (i = 0; i < len; i++) {
-		if ((((u_char *)&(dp->ip6r0_reserved)) + sizeof(u_long)
-		     + (i<<4)) > ep) goto trunc;
-		printf(" [%d]%s", i,
-		       ip6addr_string(((u_char *)&(dp->ip6r0_reserved)) +
-				      sizeof(u_long) + (i<<4)));
-		if (i != len - 1)
-			printf(", ");
-		   
+		if (GET_BE_U_4(dp0->ip6r0_reserved) || ndo->ndo_vflag) {
+			ND_PRINT(", rsv=0x%0x",
+			    GET_BE_U_4(dp0->ip6r0_reserved));
+		}
+
+		if (len % 2 == 1) {
+			ND_PRINT(" (invalid length %u)", len);
+			goto invalid;
+		}
+		len >>= 1;
+		p = (const u_char *) dp0->ip6r0_addr;
+		for (i = 0; i < len; i++) {
+			ND_PRINT(", [%u]%s", i, GET_IP6ADDR_STRING(p));
+			p += 16;
+		}
+		/*(*/
+		ND_PRINT(") ");
+		return((GET_U_1(dp0->ip6r0_len) + 1) << 3);
+		break;
+	case IPV6_RTHDR_TYPE_4:
+		srh = (const struct ip6_srh *)dp;
+		ND_PRINT(", last-entry=%u", GET_U_1(srh->srh_last_ent));
+
+		if (GET_U_1(srh->srh_flags) || ndo->ndo_vflag) {
+			ND_PRINT(", flags=0x%0x",
+				GET_U_1(srh->srh_flags));
+		}
+
+		ND_PRINT(", tag=%x", GET_BE_U_2(srh->srh_tag));
+
+		if (len % 2 == 1) {
+			ND_PRINT(" (invalid length %u)", len);
+			goto invalid;
+		}
+		len >>= 1;
+		p  = (const u_char *) srh->srh_segments;
+		for (i = 0; i < len; i++) {
+			ND_PRINT(", [%u]%s", i, GET_IP6ADDR_STRING(p));
+			p += 16;
+		}
+		/*(*/
+		ND_PRINT(") ");
+		return((GET_U_1(srh->srh_len) + 1) << 3);
+		break;
+	default:
+		ND_PRINT(" (unknown type)");
+		goto invalid;
 	}
-	printf(")");
-	return((dp->ip6r0_len + 1) << 3);
- trunc:
-	fputs("[|srcrt]", stdout);
-	return 65535;
-#undef TCHECK
+
+invalid:
+	nd_print_invalid(ndo);
+	return -1;
 }
-#endif /* INET6 */