diff --git a/print-ip.c b/print-ip.c
index ceea536..bb1554f 100644
--- a/print-ip.c
+++ b/print-ip.c
@@ -19,18 +19,19 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
-#define NETDISSECT_REWORKED
+/* \summary: IP printer */
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
 
 #include <string.h>
 
-#include "interface.h"
+#include "netdissect.h"
 #include "addrtoname.h"
-#include "extract.h"			/* must come after interface.h */
+#include "extract.h"
 
 #include "ip.h"
 #include "ipproto.h"
@@ -123,7 +124,7 @@
 		}
 	}
 trunc:
-	UNALIGNED_MEMCPY(&retval, &ip->ip_dst.s_addr, sizeof(uint32_t));
+	UNALIGNED_MEMCPY(&retval, &ip->ip_dst, sizeof(uint32_t));
 	return retval;
 }
 
@@ -148,9 +149,9 @@
 	ph.len = htons((uint16_t)len);
 	ph.mbz = 0;
 	ph.proto = next_proto;
-	UNALIGNED_MEMCPY(&ph.src, &ip->ip_src.s_addr, sizeof(uint32_t));
+	UNALIGNED_MEMCPY(&ph.src, &ip->ip_src, sizeof(uint32_t));
 	if (IP_HL(ip) == 5)
-		UNALIGNED_MEMCPY(&ph.dst, &ip->ip_dst.s_addr, sizeof(uint32_t));
+		UNALIGNED_MEMCPY(&ph.dst, &ip->ip_dst, sizeof(uint32_t));
 	else
 		ph.dst = ip_finddst(ndo, ip);
 
@@ -324,12 +325,15 @@
 	       struct ip_print_demux_state *ipds)
 {
 	struct protoent *proto;
-	struct cksum_vec vec[1];
 
 again:
 	switch (ipds->nh) {
 
 	case IPPROTO_AH:
+		if (!ND_TTEST(*ipds->cp)) {
+			ND_PRINT((ndo, "[|AH]"));
+			break;
+		}
 		ipds->nh = *ipds->cp;
 		ipds->advance = ah_print(ndo, ipds->cp);
 		if (ipds->advance <= 0)
@@ -354,14 +358,14 @@
 
 	case IPPROTO_IPCOMP:
 	{
-		int enh;
-		ipds->advance = ipcomp_print(ndo, ipds->cp, &enh);
-		if (ipds->advance <= 0)
-			break;
-		ipds->cp += ipds->advance;
-		ipds->len -= ipds->advance;
-		ipds->nh = enh & 0xff;
-		goto again;
+		ipcomp_print(ndo, ipds->cp);
+		/*
+		 * Either this has decompressed the payload and
+		 * printed it, in which case there's nothing more
+		 * to do, or it hasn't, in which case there's
+		 * nothing more to do.
+		 */
+		break;
 	}
 
 	case IPPROTO_SCTP:
@@ -455,9 +459,7 @@
 		break;
 
 	case IPPROTO_PIM:
-		vec[0].ptr = ipds->cp;
-		vec[0].len = ipds->len;
-		pim_print(ndo, ipds->cp, ipds->len, in_cksum(vec, 1));
+		pim_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
 		break;
 
 	case IPPROTO_VRRP:
@@ -528,13 +530,14 @@
 
 	ipds->ip = (const struct ip *)bp;
 	ND_TCHECK(ipds->ip->ip_vhl);
-	if (IP_V(ipds->ip) != 4) { /* print version if != 4 */
+	if (IP_V(ipds->ip) != 4) { /* print version and fail if != 4 */
 	    if (IP_V(ipds->ip) == 6)
 	      ND_PRINT((ndo, "IP6, wrong link-layer encapsulation "));
 	    else
 	      ND_PRINT((ndo, "IP%u ", IP_V(ipds->ip)));
+	    return;
 	}
-	else if (!ndo->ndo_eflag)
+	if (!ndo->ndo_eflag)
 		ND_PRINT((ndo, "IP "));
 
 	ND_TCHECK(*ipds->ip);
@@ -582,17 +585,22 @@
         if (ndo->ndo_vflag) {
             ND_PRINT((ndo, "(tos 0x%x", (int)ipds->ip->ip_tos));
             /* ECN bits */
-            if (ipds->ip->ip_tos & 0x03) {
-                switch (ipds->ip->ip_tos & 0x03) {
-                case 1:
-                    ND_PRINT((ndo, ",ECT(1)"));
-                    break;
-                case 2:
-                    ND_PRINT((ndo, ",ECT(0)"));
-                    break;
-                case 3:
-                    ND_PRINT((ndo, ",CE"));
-                }
+            switch (ipds->ip->ip_tos & 0x03) {
+
+            case 0:
+                break;
+
+            case 1:
+                ND_PRINT((ndo, ",ECT(1)"));
+                break;
+
+            case 2:
+                ND_PRINT((ndo, ",ECT(0)"));
+                break;
+
+            case 3:
+                ND_PRINT((ndo, ",CE"));
+                break;
             }
 
             if (ipds->ip->ip_ttl >= 1)
@@ -615,12 +623,12 @@
 
             if ((hlen - sizeof(struct ip)) > 0) {
                 ND_PRINT((ndo, ", options ("));
-                ip_optprint(ndo, (u_char *)(ipds->ip + 1), hlen - sizeof(struct ip));
+                ip_optprint(ndo, (const u_char *)(ipds->ip + 1), hlen - sizeof(struct ip));
                 ND_PRINT((ndo, ")"));
             }
 
-	    if (!ndo->ndo_Kflag && (u_char *)ipds->ip + hlen <= ndo->ndo_snapend) {
-	        vec[0].ptr = (const uint8_t *)(void *)ipds->ip;
+	    if (!ndo->ndo_Kflag && (const u_char *)ipds->ip + hlen <= ndo->ndo_snapend) {
+	        vec[0].ptr = (const uint8_t *)(const void *)ipds->ip;
 	        vec[0].len = hlen;
 	        sum = in_cksum(vec, 1);
 		if (sum != 0) {
@@ -649,22 +657,24 @@
 		}
 		ip_print_demux(ndo, ipds);
 	} else {
-	    /* Ultra quiet now means that all this stuff should be suppressed */
-	    if (ndo->ndo_qflag > 1) return;
+		/*
+		 * Ultra quiet now means that all this stuff should be
+		 * suppressed.
+		 */
+		if (ndo->ndo_qflag > 1)
+			return;
 
-	    /*
-	     * if this isn't the first frag, we're missing the
-	     * next level protocol header.  print the ip addr
-	     * and the protocol.
-	     */
-		if (ipds->off & 0x1fff) {
-			ND_PRINT((ndo, "%s > %s:", ipaddr_string(ndo, &ipds->ip->ip_src),
-			          ipaddr_string(ndo, &ipds->ip->ip_dst)));
-			if (!ndo->ndo_nflag && (proto = getprotobynumber(ipds->ip->ip_p)) != NULL)
-				ND_PRINT((ndo, " %s", proto->p_name));
-			else
-				ND_PRINT((ndo, " ip-proto-%d", ipds->ip->ip_p));
-		}
+		/*
+		 * This isn't the first frag, so we're missing the
+		 * next level protocol header.  print the ip addr
+		 * and the protocol.
+		 */
+		ND_PRINT((ndo, "%s > %s:", ipaddr_string(ndo, &ipds->ip->ip_src),
+		          ipaddr_string(ndo, &ipds->ip->ip_dst)));
+		if (!ndo->ndo_nflag && (proto = getprotobynumber(ipds->ip->ip_p)) != NULL)
+			ND_PRINT((ndo, " %s", proto->p_name));
+		else
+			ND_PRINT((ndo, " ip-proto-%d", ipds->ip->ip_p));
 	}
 	return;
 
@@ -676,24 +686,28 @@
 void
 ipN_print(netdissect_options *ndo, register const u_char *bp, register u_int length)
 {
-	struct ip hdr;
-
-	if (length < 4) {
+	if (length < 1) {
 		ND_PRINT((ndo, "truncated-ip %d", length));
 		return;
 	}
-	memcpy (&hdr, bp, 4);
-	switch (IP_V(&hdr)) {
-	case 4:
+
+	ND_TCHECK(*bp);
+	switch (*bp & 0xF0) {
+	case 0x40:
 		ip_print (ndo, bp, length);
-		return;
-	case 6:
+		break;
+	case 0x60:
 		ip6_print (ndo, bp, length);
-		return;
+		break;
 	default:
-		ND_PRINT((ndo, "unknown ip %d", IP_V(&hdr)));
-		return;
+		ND_PRINT((ndo, "unknown ip %d", (*bp & 0xF0) >> 4));
+		break;
 	}
+	return;
+
+trunc:
+	ND_PRINT((ndo, "%s", tstr));
+	return;
 }
 
 /*