X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/75d10a57f74bb6fd14eccd90b06c0f70ba432362..refs/pull/482/head:/print-ip6.c

diff --git a/print-ip6.c b/print-ip6.c
index a3bc90d5..45508ced 100644
--- a/print-ip6.c
+++ b/print-ip6.c
@@ -19,35 +19,57 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
-#ifndef lint
-static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.49 2005-07-03 20:33:06 hannes Exp $";
-#endif
-
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#ifdef INET6
+#include <netdissect-stdinc.h>
 
-#include <tcpdump-stdinc.h>
-
-#include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
 
-#include "interface.h"
+#include "netdissect.h"
 #include "addrtoname.h"
 #include "extract.h"
 
 #include "ip6.h"
 #include "ipproto.h"
 
+/*
+ * Compute a V6-style checksum by building a pseudoheader.
+ */
+int
+nextproto6_cksum(const struct ip6_hdr *ip6, const uint8_t *data,
+		 u_int len, u_int covlen, u_int next_proto)
+{
+        struct {
+                struct in6_addr ph_src;
+                struct in6_addr ph_dst;
+                uint32_t       ph_len;
+                uint8_t        ph_zero[3];
+                uint8_t        ph_nxt;
+        } ph;
+        struct cksum_vec vec[2];
+
+        /* pseudo-header */
+        memset(&ph, 0, sizeof(ph));
+        UNALIGNED_MEMCPY(&ph.ph_src, &ip6->ip6_src, sizeof (struct in6_addr));
+        UNALIGNED_MEMCPY(&ph.ph_dst, &ip6->ip6_dst, sizeof (struct in6_addr));
+        ph.ph_len = htonl(len);
+        ph.ph_nxt = next_proto;
+
+        vec[0].ptr = (const uint8_t *)(void *)&ph;
+        vec[0].len = sizeof(ph);
+        vec[1].ptr = data;
+        vec[1].len = covlen;
+
+        return in_cksum(vec, 2);
+}
+
 /*
  * print an IP6 datagram.
  */
 void
-ip6_print(register const u_char *bp, register u_int length)
+ip6_print(netdissect_options *ndo, const u_char *bp, u_int length)
 {
 	register const struct ip6_hdr *ip6;
 	register int advance;
@@ -61,78 +83,83 @@ ip6_print(register const u_char *bp, register u_int length)
 
 	ip6 = (const struct ip6_hdr *)bp;
 
-	TCHECK(*ip6);
+	ND_TCHECK(*ip6);
 	if (length < sizeof (struct ip6_hdr)) {
-		(void)printf("truncated-ip6 %u", length);
+		ND_PRINT((ndo, "truncated-ip6 %u", length));
 		return;
 	}
 
-        if (!eflag)
-            printf("IP6 ");
+        if (!ndo->ndo_eflag)
+            ND_PRINT((ndo, "IP6 "));
+
+	if (IP6_VERSION(ip6) != 6) {
+          ND_PRINT((ndo,"version error: %u != 6", IP6_VERSION(ip6)));
+          return;
+	}
 
 	payload_len = EXTRACT_16BITS(&ip6->ip6_plen);
 	len = payload_len + sizeof(struct ip6_hdr);
 	if (length < len)
-		(void)printf("truncated-ip6 - %u bytes missing!",
-			len - length);
+		ND_PRINT((ndo, "truncated-ip6 - %u bytes missing!",
+			len - length));
 
-        if (vflag) {
+        if (ndo->ndo_vflag) {
             flow = EXTRACT_32BITS(&ip6->ip6_flow);
-            printf("(");
+            ND_PRINT((ndo, "("));
 #if 0
             /* rfc1883 */
             if (flow & 0x0f000000)
-		(void)printf("pri 0x%02x, ", (flow & 0x0f000000) >> 24);
+		ND_PRINT((ndo, "pri 0x%02x, ", (flow & 0x0f000000) >> 24));
             if (flow & 0x00ffffff)
-		(void)printf("flowlabel 0x%06x, ", flow & 0x00ffffff);
+		ND_PRINT((ndo, "flowlabel 0x%06x, ", flow & 0x00ffffff));
 #else
             /* RFC 2460 */
             if (flow & 0x0ff00000)
-		(void)printf("class 0x%02x, ", (flow & 0x0ff00000) >> 20);
+		ND_PRINT((ndo, "class 0x%02x, ", (flow & 0x0ff00000) >> 20));
             if (flow & 0x000fffff)
-		(void)printf("flowlabel 0x%05x, ", flow & 0x000fffff);
+		ND_PRINT((ndo, "flowlabel 0x%05x, ", flow & 0x000fffff));
 #endif
 
-            (void)printf("hlim %u, next-header: %s (%u), length: %u) ",
+            ND_PRINT((ndo, "hlim %u, next-header %s (%u) payload length: %u) ",
                          ip6->ip6_hlim,
                          tok2str(ipproto_values,"unknown",ip6->ip6_nxt),
                          ip6->ip6_nxt,
-                         payload_len);
+                         payload_len));
         }
 
 	/*
 	 * Cut off the snapshot length to the end of the IP payload.
 	 */
 	ipend = bp + len;
-	if (ipend < snapend)
-		snapend = ipend;
+	if (ipend < ndo->ndo_snapend)
+		ndo->ndo_snapend = ipend;
 
 	cp = (const u_char *)ip6;
 	advance = sizeof(struct ip6_hdr);
 	nh = ip6->ip6_nxt;
-	while (cp < snapend && advance > 0) {
+	while (cp < ndo->ndo_snapend && advance > 0) {
 		cp += advance;
 		len -= advance;
 
 		if (cp == (const u_char *)(ip6 + 1) &&
 		    nh != IPPROTO_TCP && nh != IPPROTO_UDP &&
-		    nh != IPPROTO_SCTP) {
-			(void)printf("%s > %s: ", ip6addr_string(&ip6->ip6_src),
-				     ip6addr_string(&ip6->ip6_dst));
+		    nh != IPPROTO_DCCP && nh != IPPROTO_SCTP) {
+			ND_PRINT((ndo, "%s > %s: ", ip6addr_string(ndo, &ip6->ip6_src),
+				     ip6addr_string(ndo, &ip6->ip6_dst)));
 		}
 
 		switch (nh) {
 		case IPPROTO_HOPOPTS:
-			advance = hbhopt_print(cp);
+			advance = hbhopt_print(ndo, cp);
 			nh = *cp;
 			break;
 		case IPPROTO_DSTOPTS:
-			advance = dstopt_print(cp);
+			advance = dstopt_print(ndo, cp);
 			nh = *cp;
 			break;
 		case IPPROTO_FRAGMENT:
-			advance = frag6_print(cp, (const u_char *)ip6);
-			if (snapend <= cp + advance)
+			advance = frag6_print(ndo, cp, (const u_char *)ip6);
+			if (ndo->ndo_snapend <= cp + advance)
 				return;
 			nh = *cp;
 			fragmented = 1;
@@ -150,33 +177,36 @@ ip6_print(register const u_char *bp, register u_int length)
 			 * which payload can be piggybacked atop a
 			 * mobility header.
 			 */
-			advance = mobility_print(cp, (const u_char *)ip6);
+			advance = mobility_print(ndo, cp, (const u_char *)ip6);
 			nh = *cp;
 			return;
 		case IPPROTO_ROUTING:
-			advance = rt6_print(cp, (const u_char *)ip6);
+			advance = rt6_print(ndo, cp, (const u_char *)ip6);
 			nh = *cp;
 			break;
 		case IPPROTO_SCTP:
-			sctp_print(cp, (const u_char *)ip6, len);
+			sctp_print(ndo, cp, (const u_char *)ip6, len);
+			return;
+		case IPPROTO_DCCP:
+			dccp_print(ndo, cp, (const u_char *)ip6, len);
 			return;
 		case IPPROTO_TCP:
-			tcp_print(cp, len, (const u_char *)ip6, fragmented);
+			tcp_print(ndo, cp, len, (const u_char *)ip6, fragmented);
 			return;
 		case IPPROTO_UDP:
-			udp_print(cp, len, (const u_char *)ip6, fragmented);
+			udp_print(ndo, cp, len, (const u_char *)ip6, fragmented);
 			return;
 		case IPPROTO_ICMPV6:
-			icmp6_print(cp, len, (const u_char *)ip6, fragmented);
+			icmp6_print(ndo, cp, len, (const u_char *)ip6, fragmented);
 			return;
 		case IPPROTO_AH:
-			advance = ah_print(cp);
+			advance = ah_print(ndo, cp);
 			nh = *cp;
 			break;
 		case IPPROTO_ESP:
 		    {
 			int enh, padlen;
-			advance = esp_print(gndo, cp, len, (const u_char *)ip6, &enh, &padlen);
+			advance = esp_print(ndo, cp, len, (const u_char *)ip6, &enh, &padlen);
 			nh = enh & 0xff;
 			len -= padlen;
 			break;
@@ -184,52 +214,50 @@ ip6_print(register const u_char *bp, register u_int length)
 		case IPPROTO_IPCOMP:
 		    {
 			int enh;
-			advance = ipcomp_print(cp, &enh);
+			advance = ipcomp_print(ndo, cp, &enh);
 			nh = enh & 0xff;
 			break;
 		    }
 
 		case IPPROTO_PIM:
-			pim_print(cp, len);
+			pim_print(ndo, cp, len, (const u_char *)ip6);
 			return;
 
 		case IPPROTO_OSPF:
-			ospf6_print(cp, len);
+			ospf6_print(ndo, cp, len);
 			return;
 
 		case IPPROTO_IPV6:
-			ip6_print(cp, len);
+			ip6_print(ndo, cp, len);
 			return;
 
 		case IPPROTO_IPV4:
-		        ip_print(gndo, cp, len);
+		        ip_print(ndo, cp, len);
 			return;
 
                 case IPPROTO_PGM:
-                        pgm_print(cp, len, (const u_char *)ip6);
+                        pgm_print(ndo, cp, len, (const u_char *)ip6);
                         return;
 
 		case IPPROTO_GRE:
-			gre_print(cp, len);
+			gre_print(ndo, cp, len);
 			return;
 
 		case IPPROTO_RSVP:
-			rsvp_print(cp, len);
+			rsvp_print(ndo, cp, len);
 			return;
 
 		case IPPROTO_NONE:
-			(void)printf("no next header");
+			ND_PRINT((ndo, "no next header"));
 			return;
 
 		default:
-			(void)printf("ip-proto-%d %d", ip6->ip6_nxt, len);
+			ND_PRINT((ndo, "ip-proto-%d %d", nh, len));
 			return;
 		}
 	}
 
 	return;
 trunc:
-	(void)printf("[|ip6]");
+	ND_PRINT((ndo, "[|ip6]"));
 }
-
-#endif /* INET6 */