X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/3cd171317f54bc968808d49e3ca87b6c49ccdcdd..d75ee07998ef8ac0fc1a9a6beea2e15a3ca1f726:/print-ip6.c

diff --git a/print-ip6.c b/print-ip6.c
index 14a8c5ce..ee3df72d 100644
--- a/print-ip6.c
+++ b/print-ip6.c
@@ -21,7 +21,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.6 2000-07-01 03:39:05 assar Exp $";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-ip6.c,v 1.31 2003-06-07 11:57:54 guy Exp $";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -30,163 +30,142 @@ static const char rcsid[] =
 
 #ifdef INET6
 
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
-#include <netinet/udp.h>
-#include <netinet/udp_var.h>
-#include <netinet/tcp.h>
+#include <tcpdump-stdinc.h>
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
+#include <string.h>
 
 #include "interface.h"
 #include "addrtoname.h"
+#include "extract.h"
 
-#include <netinet/ip6.h>
+#include "ip6.h"
+#include "ipproto.h"
 
 /*
  * print an IP6 datagram.
  */
 void
-ip6_print(register const u_char *bp, register int length)
+ip6_print(register const u_char *bp, register u_int length)
 {
 	register const struct ip6_hdr *ip6;
-	register int hlen;
-	register int len;
+	register int advance;
+	register u_int len;
 	register const u_char *cp;
 	int nh;
+	int fragmented = 0;
 	u_int flow;
-	
+
 	ip6 = (const struct ip6_hdr *)bp;
 
-#ifdef TCPDUMP_ALIGN
-	/*
-	 * The IP header is not word aligned, so copy into abuf.
-	 * This will never happen with BPF.  It does happen raw packet
-	 * dumps from -r.
-	 */
-	if ((int)ip & (sizeof(long)-1)) {
-		static u_char *abuf;
-
-		if (abuf == 0)
-			abuf = (u_char *)malloc(snaplen);
-		bcopy((char *)ip, (char *)abuf, min(length, snaplen));
-		snapend += abuf - (u_char *)ip;
-		packetp = abuf;
-		ip = (struct ip6_hdr *)abuf;
-	}
-#endif
-	if ((u_char *)(ip6 + 1) > snapend) {
-		printf("[|ip6]");
-		return;
-	}
+	TCHECK(*ip6);
 	if (length < sizeof (struct ip6_hdr)) {
 		(void)printf("truncated-ip6 %d", length);
 		return;
 	}
-	hlen = sizeof(struct ip6_hdr);
+	advance = sizeof(struct ip6_hdr);
 
-	len = ntohs(ip6->ip6_plen);
-	if (length < len + hlen)
+	len = EXTRACT_16BITS(&ip6->ip6_plen);
+	if (length < len + advance)
 		(void)printf("truncated-ip6 - %d bytes missing!",
-			len + hlen - length);
+			len + advance - length);
 
 	cp = (const u_char *)ip6;
 	nh = ip6->ip6_nxt;
 	while (cp < snapend) {
-		cp += hlen;
+		cp += advance;
 
-		if (cp == (u_char *)(ip6 + 1)
-		 && nh != IPPROTO_TCP && nh != IPPROTO_UDP) {
+		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));
 		}
 
 		switch (nh) {
 		case IPPROTO_HOPOPTS:
-			hlen = hbhopt_print(cp);
+			advance = hbhopt_print(cp);
 			nh = *cp;
 			break;
 		case IPPROTO_DSTOPTS:
-			hlen = dstopt_print(cp);
+			advance = dstopt_print(cp);
 			nh = *cp;
 			break;
 		case IPPROTO_FRAGMENT:
-			hlen = frag6_print(cp, (const u_char *)ip6);
-			if (snapend <= cp + hlen)
+			advance = frag6_print(cp, (const u_char *)ip6);
+			if (snapend <= cp + advance)
 				goto end;
 			nh = *cp;
+			fragmented = 1;
 			break;
+
+		case IPPROTO_MOBILITY:
+			/*
+			 * XXX - we don't use "advance"; is this
+			 * header always a final header?
+			 */
+			advance = mobility_print(cp, (const u_char *)ip6);
+			nh = *cp;
+			goto end;
 		case IPPROTO_ROUTING:
-			hlen = rt6_print(cp, (const u_char *)ip6);
+			advance = rt6_print(cp, (const u_char *)ip6);
 			nh = *cp;
 			break;
+		case IPPROTO_SCTP:
+			sctp_print(cp, (const u_char *)ip6, 
+				len + sizeof(struct ip6_hdr) - (cp - bp));
+			goto end;
 		case IPPROTO_TCP:
 			tcp_print(cp, len + sizeof(struct ip6_hdr) - (cp - bp),
-				(const u_char *)ip6);
+				(const u_char *)ip6, fragmented);
 			goto end;
 		case IPPROTO_UDP:
 			udp_print(cp, len + sizeof(struct ip6_hdr) - (cp - bp),
-				(const u_char *)ip6);
+				(const u_char *)ip6, fragmented);
 			goto end;
 		case IPPROTO_ICMPV6:
-			icmp6_print(cp, (const u_char *)ip6);
+			icmp6_print(cp, (const u_char *)ip6, fragmented);
 			goto end;
 		case IPPROTO_AH:
-			hlen = ah_print(cp, (const u_char *)ip6);
+			advance = ah_print(cp);
 			nh = *cp;
 			break;
 		case IPPROTO_ESP:
 		    {
-			int enh;
-			cp += esp_print(cp, (const u_char *)ip6, &enh);
+			int enh, padlen;
+			advance = esp_print(cp, (const u_char *)ip6, &enh, &padlen);
 			if (enh < 0)
 				goto end;
 			nh = enh & 0xff;
+			len -= padlen;
 			break;
 		    }
-#ifndef IPPROTO_IPCOMP
-#define IPPROTO_IPCOMP	108
-#endif
 		case IPPROTO_IPCOMP:
 		    {
 			int enh;
-			cp += ipcomp_print(cp, (const u_char *)ip6, &enh);
+			advance = ipcomp_print(cp, &enh);
 			if (enh < 0)
 				goto end;
 			nh = enh & 0xff;
 			break;
 		    }
 
-#ifndef IPPROTO_PIM
-#define IPPROTO_PIM	103
-#endif
 		case IPPROTO_PIM:
 			pim_print(cp, len);
 			goto end;
-#ifndef IPPROTO_OSPF
-#define IPPROTO_OSPF 89
-#endif
 		case IPPROTO_OSPF:
 			ospf6_print(cp, len);
 			goto end;
+
 		case IPPROTO_IPV6:
 			ip6_print(cp, len);
 			goto end;
-#ifndef IPPROTO_IPV4
-#define IPPROTO_IPV4	4
-#endif
+
 		case IPPROTO_IPV4:
 			ip_print(cp, len);
 			goto end;
+
 		case IPPROTO_NONE:
 			(void)printf("no next header");
 			goto end;
@@ -198,8 +177,8 @@ ip6_print(register const u_char *bp, register int length)
 	}
 
  end:
-	
-	flow = ntohl(ip6->ip6_flow);
+
+	flow = EXTRACT_32BITS(&ip6->ip6_flow);
 #if 0
 	/* rfc1883 */
 	if (flow & 0x0f000000)
@@ -224,6 +203,9 @@ ip6_print(register const u_char *bp, register int length)
 			(void)printf(", hlim %d", (int)ip6->ip6_hlim);
 		printf(")");
 	}
+	return;
+trunc:
+	(void)printf("[|ip6]");
 }
 
 #endif /* INET6 */