jer         15/01/07 16:23:14

  Added:                tcpdump-4.6.2-CVE-2014-8768.patch
                        tcpdump-4.6.2-CVE-2014-9140.patch
                        tcpdump-4.6.2-CVE-2014-8767.patch
                        tcpdump-4.6.2-CVE-2014-8769.patch
  Log:
  Patches for multiple vulnerabilities (bug #534660).
  
  (Portage version: 2.2.15/cvs/Linux x86_64, signed Manifest commit with key 
A792A613)

Revision  Changes    Path
1.1                  
net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-8768.patch

file : 
http://sources.gentoo.org/viewvc.cgi/gentoo-x86/net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-8768.patch?rev=1.1&view=markup
plain: 
http://sources.gentoo.org/viewvc.cgi/gentoo-x86/net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-8768.patch?rev=1.1&content-type=text/plain

Index: tcpdump-4.6.2-CVE-2014-8768.patch
===================================================================
--- a/print-geonet.c
+++ b/print-geonet.c
@@ -56,16 +56,12 @@ static const struct tok msg_type_values[] = {
 
 static void
 print_btp_body(netdissect_options *ndo,
-               const u_char *bp, u_int length)
+               const u_char *bp)
 {
        int version;
        int msg_type;
        const char *msg_type_str;
 
-       if (length <= 2) {
-               return;
-       }
-
        /* Assuming ItsDpuHeader */
        version = bp[0];
        msg_type = bp[1];
@@ -83,7 +79,7 @@ print_btp(netdissect_options *ndo,
        ND_PRINT((ndo, "; BTP Dst:%u Src:%u", dest, src));
 }
 
-static void
+static int
 print_long_pos_vector(netdissect_options *ndo,
                       const u_char *bp)
 {
@@ -91,10 +87,13 @@ print_long_pos_vector(netdissect_options *ndo,
 
        ND_PRINT((ndo, "GN_ADDR:%s ", linkaddr_string (ndo, bp, 0, 
GEONET_ADDR_LEN)));
 
+       if (!ND_TTEST2(*(bp+12), 8))
+               return (-1);
        lat = EXTRACT_32BITS(bp+12);
        ND_PRINT((ndo, "lat:%d ", lat));
        lon = EXTRACT_32BITS(bp+16);
        ND_PRINT((ndo, "lon:%d", lon));
+       return (0);
 }
 
 
@@ -105,137 +104,170 @@ print_long_pos_vector(netdissect_options *ndo,
 void
 geonet_print(netdissect_options *ndo, const u_char *eth, const u_char *bp, 
u_int length)
 {
+       int version;
+       int next_hdr;
+       int hdr_type;
+       int hdr_subtype;
+       uint16_t payload_length;
+       int hop_limit;
+       const char *next_hdr_txt = "Unknown";
+       const char *hdr_type_txt = "Unknown";
+       int hdr_size = -1;
+
        ND_PRINT((ndo, "GeoNet src:%s; ", etheraddr_string(ndo, eth+6)));
 
-       if (length >= 36) {
-               /* Process Common Header */
-               int version = bp[0] >> 4;
-               int next_hdr = bp[0] & 0x0f;
-               int hdr_type = bp[1] >> 4;
-               int hdr_subtype = bp[1] & 0x0f;
-               uint16_t payload_length = EXTRACT_16BITS(bp+4);
-               int hop_limit = bp[7];
-               const char *next_hdr_txt = "Unknown";
-               const char *hdr_type_txt = "Unknown";
-               int hdr_size = -1;
+       /* Process Common Header */
+       if (length < 36)
+               goto malformed;
+               
+       ND_TCHECK2(*bp, 7);
+       version = bp[0] >> 4;
+       next_hdr = bp[0] & 0x0f;
+       hdr_type = bp[1] >> 4;
+       hdr_subtype = bp[1] & 0x0f;
+       payload_length = EXTRACT_16BITS(bp+4);
+       hop_limit = bp[7];
 
-               switch (next_hdr) {
-                       case 0: next_hdr_txt = "Any"; break;
-                       case 1: next_hdr_txt = "BTP-A"; break;
-                       case 2: next_hdr_txt = "BTP-B"; break;
-                       case 3: next_hdr_txt = "IPv6"; break;
-               }
+       switch (next_hdr) {
+               case 0: next_hdr_txt = "Any"; break;
+               case 1: next_hdr_txt = "BTP-A"; break;
+               case 2: next_hdr_txt = "BTP-B"; break;
+               case 3: next_hdr_txt = "IPv6"; break;
+       }
 
-               switch (hdr_type) {
-                       case 0: hdr_type_txt = "Any"; break;
-                       case 1: hdr_type_txt = "Beacon"; break;
-                       case 2: hdr_type_txt = "GeoUnicast"; break;
-                       case 3: switch (hdr_subtype) {
-                                       case 0: hdr_type_txt = 
"GeoAnycastCircle"; break;
-                                       case 1: hdr_type_txt = 
"GeoAnycastRect"; break;
-                                       case 2: hdr_type_txt = 
"GeoAnycastElipse"; break;
-                               }
-                               break;
-                       case 4: switch (hdr_subtype) {
-                                       case 0: hdr_type_txt = 
"GeoBroadcastCircle"; break;
-                                       case 1: hdr_type_txt = 
"GeoBroadcastRect"; break;
-                                       case 2: hdr_type_txt = 
"GeoBroadcastElipse"; break;
-                               }
-                               break;
-                       case 5: switch (hdr_subtype) {
-                                       case 0: hdr_type_txt = 
"TopoScopeBcast-SH"; break;
-                                       case 1: hdr_type_txt = 
"TopoScopeBcast-MH"; break;
-                               }
-                               break;
-                       case 6: switch (hdr_subtype) {
-                                       case 0: hdr_type_txt = 
"LocService-Request"; break;
-                                       case 1: hdr_type_txt = 
"LocService-Reply"; break;
-                               }
-                               break;
-               }
+       switch (hdr_type) {
+               case 0: hdr_type_txt = "Any"; break;
+               case 1: hdr_type_txt = "Beacon"; break;
+               case 2: hdr_type_txt = "GeoUnicast"; break;
+               case 3: switch (hdr_subtype) {
+                               case 0: hdr_type_txt = "GeoAnycastCircle"; 
break;
+                               case 1: hdr_type_txt = "GeoAnycastRect"; break;
+                               case 2: hdr_type_txt = "GeoAnycastElipse"; 
break;
+                       }
+                       break;
+               case 4: switch (hdr_subtype) {
+                               case 0: hdr_type_txt = "GeoBroadcastCircle"; 
break;
+                               case 1: hdr_type_txt = "GeoBroadcastRect"; 
break;
+                               case 2: hdr_type_txt = "GeoBroadcastElipse"; 
break;
+                       }
+                       break;
+               case 5: switch (hdr_subtype) {
+                               case 0: hdr_type_txt = "TopoScopeBcast-SH"; 
break;
+                               case 1: hdr_type_txt = "TopoScopeBcast-MH"; 
break;
+                       }
+                       break;
+               case 6: switch (hdr_subtype) {
+                               case 0: hdr_type_txt = "LocService-Request"; 
break;
+                               case 1: hdr_type_txt = "LocService-Reply"; 
break;
+                       }
+                       break;
+       }
+
+       ND_PRINT((ndo, "v:%d ", version));
+       ND_PRINT((ndo, "NH:%d-%s ", next_hdr, next_hdr_txt));
+       ND_PRINT((ndo, "HT:%d-%d-%s ", hdr_type, hdr_subtype, hdr_type_txt));
+       ND_PRINT((ndo, "HopLim:%d ", hop_limit));
+       ND_PRINT((ndo, "Payload:%d ", payload_length));
+       if (print_long_pos_vector(ndo, bp + 8) == -1)
+               goto trunc;
 
-               ND_PRINT((ndo, "v:%d ", version));
-               ND_PRINT((ndo, "NH:%d-%s ", next_hdr, next_hdr_txt));
-               ND_PRINT((ndo, "HT:%d-%d-%s ", hdr_type, hdr_subtype, 
hdr_type_txt));
-               ND_PRINT((ndo, "HopLim:%d ", hop_limit));
-               ND_PRINT((ndo, "Payload:%d ", payload_length));
-               print_long_pos_vector(ndo, bp + 8);
+       /* Skip Common Header */
+       length -= 36;
+       bp += 36;
 
-               /* Skip Common Header */
-               length -= 36;
-               bp += 36;
+       /* Process Extended Headers */
+       switch (hdr_type) {
+               case 0: /* Any */
+                       hdr_size = 0;
+                       break;
+               case 1: /* Beacon */
+                       hdr_size = 0;
+                       break;
+               case 2: /* GeoUnicast */
+                       break;
+               case 3: switch (hdr_subtype) {
+                               case 0: /* GeoAnycastCircle */
+                                       break;
+                               case 1: /* GeoAnycastRect */
+                                       break;
+                               case 2: /* GeoAnycastElipse */
+                                       break;
+                       }
+                       break;
+               case 4: switch (hdr_subtype) {
+                               case 0: /* GeoBroadcastCircle */
+                                       break;
+                               case 1: /* GeoBroadcastRect */
+                                       break;
+                               case 2: /* GeoBroadcastElipse */
+                                       break;
+                       }
+                       break;
+               case 5: switch (hdr_subtype) {
+                               case 0: /* TopoScopeBcast-SH */
+                                       hdr_size = 0;
+                                       break;
+                               case 1: /* TopoScopeBcast-MH */
+                                       hdr_size = 68 - 36;
+                                       break;
+                       }
+                       break;
+               case 6: switch (hdr_subtype) {
+                               case 0: /* LocService-Request */
+                                       break;
+                               case 1: /* LocService-Reply */
+                                       break;
+                       }
+                       break;
+       }
 
-               /* Process Extended Headers */
-               switch (hdr_type) {
+       /* Skip Extended headers */
+       if (hdr_size >= 0) {
+               if (length < (u_int)hdr_size)
+                       goto malformed;
+               ND_TCHECK2(*bp, hdr_size);
+               length -= hdr_size;
+               bp += hdr_size;
+               switch (next_hdr) {
                        case 0: /* Any */
-                               hdr_size = 0;
-                               break;
-                       case 1: /* Beacon */
-                               hdr_size = 0;
-                               break;
-                       case 2: /* GeoUnicast */
                                break;
-                       case 3: switch (hdr_subtype) {
-                                       case 0: /* GeoAnycastCircle */
-                                               break;
-                                       case 1: /* GeoAnycastRect */
-                                               break;
-                                       case 2: /* GeoAnycastElipse */
-                                               break;
+                       case 1:
+                       case 2: /* BTP A/B */
+                               if (length < 4)
+                                       goto malformed;
+                               ND_TCHECK2(*bp, 4);
+                               print_btp(ndo, bp);
+                               length -= 4;
+                               bp += 4;
+                               if (length >= 2) {
+                                       /*
+                                        * XXX - did print_btp_body()
+                                        * return if length < 2
+                                        * because this is optional,
+                                        * or was that just not
+                                        * reporting genuine errors?
+                                        */
+                                       ND_TCHECK2(*bp, 2);
+                                       print_btp_body(ndo, bp);
                                }
                                break;
-                       case 4: switch (hdr_subtype) {
-                                       case 0: /* GeoBroadcastCircle */
-                                               break;
-                                       case 1: /* GeoBroadcastRect */
-                                               break;
-                                       case 2: /* GeoBroadcastElipse */
-                                               break;
-                               }
-                               break;
-                       case 5: switch (hdr_subtype) {
-                                       case 0: /* TopoScopeBcast-SH */
-                                               hdr_size = 0;
-                                               break;
-                                       case 1: /* TopoScopeBcast-MH */
-                                               hdr_size = 68 - 36;
-                                               break;
-                               }
-                               break;
-                       case 6: switch (hdr_subtype) {
-                                       case 0: /* LocService-Request */
-                                               break;
-                                       case 1: /* LocService-Reply */
-                                               break;
-                               }
+                       case 3: /* IPv6 */
                                break;
                }
-
-               /* Skip Extended headers */
-               if (hdr_size >= 0) {
-                       length -= hdr_size;
-                       bp += hdr_size;
-                       switch (next_hdr) {
-                               case 0: /* Any */
-                                       break;
-                               case 1:
-                               case 2: /* BTP A/B */
-                                       print_btp(ndo, bp);
-                                       length -= 4;
-                                       bp += 4;
-                                       print_btp_body(ndo, bp, length);
-                                       break;
-                               case 3: /* IPv6 */
-                                       break;
-                       }
-               }
-       } else {
-               ND_PRINT((ndo, "Malformed (small) "));
        }
 
        /* Print user data part */
        if (ndo->ndo_vflag)
                ND_DEFAULTPRINT(bp, length);
+       return;
+
+malformed:
+       ND_PRINT((ndo, " Malformed (small) "));
+       /* XXX - print the remaining data as hex? */
+       return;
+
+trunc:
+       ND_PRINT((ndo, "[|geonet]"));
 }
 
 



1.1                  
net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-9140.patch

file : 
http://sources.gentoo.org/viewvc.cgi/gentoo-x86/net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-9140.patch?rev=1.1&view=markup
plain: 
http://sources.gentoo.org/viewvc.cgi/gentoo-x86/net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-9140.patch?rev=1.1&content-type=text/plain

Index: tcpdump-4.6.2-CVE-2014-9140.patch
===================================================================
--- a/print-ppp.c
+++ b/print-ppp.c
@@ -1351,14 +1351,15 @@ static void
 ppp_hdlc(netdissect_options *ndo,
          const u_char *p, int length)
 {
-       u_char *b, *s, *t, c;
+       u_char *b, *t, c;
+       const u_char *s;
        int i, proto;
        const void *se;
 
         if (length <= 0)
                 return;
 
-       b = (uint8_t *)malloc(length);
+       b = (u_char *)malloc(length);
        if (b == NULL)
                return;
 
@@ -1367,14 +1368,13 @@ ppp_hdlc(netdissect_options *ndo,
         * Do this so that we dont overwrite the original packet
         * contents.
         */
-       for (s = (u_char *)p, t = b, i = length; i > 0; i--) {
+       for (s = p, t = b, i = length; i > 0 && ND_TTEST(*s); i--) {
                c = *s++;
                if (c == 0x7d) {
-                       if (i > 1) {
-                               i--;
-                               c = *s++ ^ 0x20;
-                       } else
-                               continue;
+                       if (i <= 1 || !ND_TTEST(*s))
+                               break;
+                       i--;
+                       c = *s++ ^ 0x20;
                }
                *t++ = c;
        }



1.1                  
net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-8767.patch

file : 
http://sources.gentoo.org/viewvc.cgi/gentoo-x86/net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-8767.patch?rev=1.1&view=markup
plain: 
http://sources.gentoo.org/viewvc.cgi/gentoo-x86/net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-8767.patch?rev=1.1&content-type=text/plain

Index: tcpdump-4.6.2-CVE-2014-8767.patch
===================================================================
--- a/print-olsr.c
+++ b/print-olsr.c
@@ -178,7 +178,7 @@ struct olsr_lq_neighbor6 {
 /*
  * print a neighbor list with LQ extensions.
  */
-static void
+static int
 olsr_print_lq_neighbor4(netdissect_options *ndo,
                         const u_char *msg_data, u_int hello_len)
 {
@@ -187,6 +187,8 @@ olsr_print_lq_neighbor4(netdissect_options *ndo,
     while (hello_len >= sizeof(struct olsr_lq_neighbor4)) {
 
         lq_neighbor = (struct olsr_lq_neighbor4 *)msg_data;
+        if (!ND_TTEST(*lq_neighbor))
+            return (-1);
 
         ND_PRINT((ndo, "\n\t      neighbor %s, link-quality %.2lf%%"
                ", neighbor-link-quality %.2lf%%",
@@ -197,10 +199,11 @@ olsr_print_lq_neighbor4(netdissect_options *ndo,
         msg_data += sizeof(struct olsr_lq_neighbor4);
         hello_len -= sizeof(struct olsr_lq_neighbor4);
     }
+    return (0);
 }
 
 #if INET6
-static void
+static int
 olsr_print_lq_neighbor6(netdissect_options *ndo,
                         const u_char *msg_data, u_int hello_len)
 {
@@ -209,6 +212,8 @@ olsr_print_lq_neighbor6(netdissect_options *ndo,
     while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
 
         lq_neighbor = (struct olsr_lq_neighbor6 *)msg_data;
+        if (!ND_TTEST(*lq_neighbor))
+            return (-1);
 
         ND_PRINT((ndo, "\n\t      neighbor %s, link-quality %.2lf%%"
                ", neighbor-link-quality %.2lf%%",
@@ -219,13 +224,14 @@ olsr_print_lq_neighbor6(netdissect_options *ndo,
         msg_data += sizeof(struct olsr_lq_neighbor6);
         hello_len -= sizeof(struct olsr_lq_neighbor6);
     }
+    return (0);
 }
 #endif /* INET6 */
 
 /*
  * print a neighbor list.
  */
-static void
+static int
 olsr_print_neighbor(netdissect_options *ndo,
                     const u_char *msg_data, u_int hello_len)
 {
@@ -236,6 +242,8 @@ olsr_print_neighbor(netdissect_options *ndo,
 
     while (hello_len >= sizeof(struct in_addr)) {
 
+        if (!ND_TTEST2(*msg_data, sizeof(struct in_addr)))
+            return (-1);
         /* print 4 neighbors per line */
 
         ND_PRINT((ndo, "%s%s", ipaddr_string(ndo, msg_data),
@@ -244,6 +252,7 @@ olsr_print_neighbor(netdissect_options *ndo,
         msg_data += sizeof(struct in_addr);
         hello_len -= sizeof(struct in_addr);
     }
+    return (0);
 }
 
 
@@ -326,6 +335,9 @@ olsr_print(netdissect_options *ndo,
                     ME_TO_DOUBLE(msgptr.v6->vtime),
                     EXTRACT_16BITS(msgptr.v6->msg_seq),
                     msg_len, (msg_len_valid == 0) ? " (invalid)" : ""));
+            if (!msg_len_valid) {
+                return;
+            }
 
             msg_tlen = msg_len - sizeof(struct olsr_msg6);
             msg_data = tptr + sizeof(struct olsr_msg6);
@@ -354,6 +366,9 @@ olsr_print(netdissect_options *ndo,
                     ME_TO_DOUBLE(msgptr.v4->vtime),
                     EXTRACT_16BITS(msgptr.v4->msg_seq),
                     msg_len, (msg_len_valid == 0) ? " (invalid)" : ""));
+            if (!msg_len_valid) {
+                return;
+            }
 
             msg_tlen = msg_len - sizeof(struct olsr_msg4);
             msg_data = tptr + sizeof(struct olsr_msg4);
@@ -362,6 +377,8 @@ olsr_print(netdissect_options *ndo,
         switch (msg_type) {
         case OLSR_HELLO_MSG:
         case OLSR_HELLO_LQ_MSG:
+            if (msg_tlen < sizeof(struct olsr_hello))
+                goto trunc;
             ND_TCHECK2(*msg_data, sizeof(struct olsr_hello));
 
             ptr.hello = (struct olsr_hello *)msg_data;
@@ -401,15 +418,21 @@ olsr_print(netdissect_options *ndo,
                 msg_tlen -= sizeof(struct olsr_hello_link);
                 hello_len -= sizeof(struct olsr_hello_link);
 
+                ND_TCHECK2(*msg_data, hello_len);
                 if (msg_type == OLSR_HELLO_MSG) {
-                    olsr_print_neighbor(ndo, msg_data, hello_len);
+                    if (olsr_print_neighbor(ndo, msg_data, hello_len) == -1)
+                        goto trunc;
                 } else {
 #if INET6
-                    if (is_ipv6)
-                        olsr_print_lq_neighbor6(ndo, msg_data, hello_len);
-                    else
+                    if (is_ipv6) {
+                        if (olsr_print_lq_neighbor6(ndo, msg_data, hello_len) 
== -1)
+                            goto trunc;
+                    } else
 #endif
-                        olsr_print_lq_neighbor4(ndo, msg_data, hello_len);
+                    {
+                        if (olsr_print_lq_neighbor4(ndo, msg_data, hello_len) 
== -1)
+                            goto trunc;
+                    }
                 }
 
                 msg_data += hello_len;
@@ -419,6 +442,8 @@ olsr_print(netdissect_options *ndo,
 
         case OLSR_TC_MSG:
         case OLSR_TC_LQ_MSG:
+            if (msg_tlen < sizeof(struct olsr_tc))
+                goto trunc;
             ND_TCHECK2(*msg_data, sizeof(struct olsr_tc));
 
             ptr.tc = (struct olsr_tc *)msg_data;
@@ -428,14 +453,19 @@ olsr_print(netdissect_options *ndo,
             msg_tlen -= sizeof(struct olsr_tc);
 
             if (msg_type == OLSR_TC_MSG) {
-                olsr_print_neighbor(ndo, msg_data, msg_tlen);
+                if (olsr_print_neighbor(ndo, msg_data, msg_tlen) == -1)
+                    goto trunc;
             } else {
 #if INET6
-                if (is_ipv6)
-                    olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen);
-                else
+                if (is_ipv6) {
+                    if (olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen) == -1)
+                        goto trunc;
+                } else
 #endif
-                    olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen);
+                {
+                    if (olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen) == -1)
+                        goto trunc;
+                }
             }
             break;
 



1.1                  
net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-8769.patch

file : 
http://sources.gentoo.org/viewvc.cgi/gentoo-x86/net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-8769.patch?rev=1.1&view=markup
plain: 
http://sources.gentoo.org/viewvc.cgi/gentoo-x86/net-analyzer/tcpdump/files/tcpdump-4.6.2-CVE-2014-8769.patch?rev=1.1&content-type=text/plain

Index: tcpdump-4.6.2-CVE-2014-8769.patch
===================================================================
--- a/print-aodv.c
+++ b/print-aodv.c
@@ -37,9 +37,6 @@
 
 #include <tcpdump-stdinc.h>
 
-/* for offsetof */
-#include <stddef.h>
-
 #include "interface.h"
 #include "addrtoname.h"
 #include "extract.h"                   /* must come after interface.h */
@@ -146,13 +143,6 @@ struct aodv_rerr {
        uint8_t         rerr_flags;     /* various flags */
        uint8_t         rerr_zero0;     /* reserved, set to zero */
        uint8_t         rerr_dc;        /* destination count */
-       union {
-               struct  rerr_unreach dest[1];
-#ifdef INET6
-               struct  rerr_unreach6 dest6[1];
-               struct  rerr_unreach6_draft_01 dest6_draft_01[1];
-#endif
-       } r;
 };
 
 #define RERR_NODELETE          0x80    /* don't delete the link */
@@ -163,19 +153,6 @@ struct aodv_rrep_ack {
        uint8_t         ra_zero0;
 };
 
-union aodv {
-       struct aodv_rreq rreq;
-       struct aodv_rrep rrep;
-       struct aodv_rerr rerr;
-       struct aodv_rrep_ack rrep_ack;
-#ifdef INET6
-       struct aodv_rreq6 rreq6;
-       struct aodv_rreq6_draft_01 rreq6_draft_01;
-       struct aodv_rrep6 rrep6;
-       struct aodv_rrep6_draft_01 rrep6_draft_01;
-#endif
-};
-
 #define        AODV_RREQ               1       /* route request */
 #define        AODV_RREP               2       /* route response */
 #define        AODV_RERR               3       /* error report */
@@ -204,22 +181,14 @@ static void
 aodv_extension(netdissect_options *ndo,
                const struct aodv_ext *ep, u_int length)
 {
-       u_int i;
        const struct aodv_hello *ah;
 
        switch (ep->type) {
        case AODV_EXT_HELLO:
-               if (ndo->ndo_snapend < (u_char *) ep) {
-                       ND_PRINT((ndo, " [|hello]"));
-                       return;
-               }
-               i = min(length, (u_int)(ndo->ndo_snapend - (u_char *)ep));
-               if (i < sizeof(struct aodv_hello)) {
-                       ND_PRINT((ndo, " [|hello]"));
-                       return;
-               }
-               i -= sizeof(struct aodv_hello);
-               ah = (void *)ep;
+               ah = (const struct aodv_hello *)(const void *)ep;
+               ND_TCHECK(*ah);
+               if (length < sizeof(struct aodv_hello))
+                       goto trunc;
                ND_PRINT((ndo, "\n\text HELLO %ld ms",
                    (unsigned long)EXTRACT_32BITS(&ah->interval)));
                break;
@@ -228,141 +197,135 @@ aodv_extension(netdissect_options *ndo,
                ND_PRINT((ndo, "\n\text %u %u", ep->type, ep->length));
                break;
        }
+       return;
+
+trunc:
+       ND_PRINT((ndo, " [|hello]"));
 }
 
 static void
-aodv_rreq(netdissect_options *ndo,
-          const union aodv *ap, const u_char *dat, u_int length)
+aodv_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
 {
        u_int i;
+       const struct aodv_rreq *ap = (const struct aodv_rreq *)dat;
 
-       if (ndo->ndo_snapend < dat) {
-               ND_PRINT((ndo, " [|aodv]"));
-               return;
-       }
-       i = min(length, (u_int)(ndo->ndo_snapend - dat));
-       if (i < sizeof(ap->rreq)) {
-               ND_PRINT((ndo, " [|rreq]"));
-               return;
-       }
-       i -= sizeof(ap->rreq);
+       ND_TCHECK(*ap);
+       if (length < sizeof(*ap))
+               goto trunc;
        ND_PRINT((ndo, " rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
            "\tdst %s seq %lu src %s seq %lu", length,
-           ap->rreq.rreq_type & RREQ_JOIN ? "[J]" : "",
-           ap->rreq.rreq_type & RREQ_REPAIR ? "[R]" : "",
-           ap->rreq.rreq_type & RREQ_GRAT ? "[G]" : "",
-           ap->rreq.rreq_type & RREQ_DEST ? "[D]" : "",
-           ap->rreq.rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
-           ap->rreq.rreq_hops,
-           (unsigned long)EXTRACT_32BITS(&ap->rreq.rreq_id),
-           ipaddr_string(ndo, &ap->rreq.rreq_da),
-           (unsigned long)EXTRACT_32BITS(&ap->rreq.rreq_ds),
-           ipaddr_string(ndo, &ap->rreq.rreq_oa),
-           (unsigned long)EXTRACT_32BITS(&ap->rreq.rreq_os)));
+           ap->rreq_type & RREQ_JOIN ? "[J]" : "",
+           ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
+           ap->rreq_type & RREQ_GRAT ? "[G]" : "",
+           ap->rreq_type & RREQ_DEST ? "[D]" : "",
+           ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
+           ap->rreq_hops,
+           (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
+           ipaddr_string(ndo, &ap->rreq_da),
+           (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
+           ipaddr_string(ndo, &ap->rreq_oa),
+           (unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
+       i = length - sizeof(*ap);
        if (i >= sizeof(struct aodv_ext))
-               aodv_extension(ndo, (void *)(&ap->rreq + 1), i);
+               aodv_extension(ndo, (const struct aodv_ext *)(dat + 
sizeof(*ap)), i);
+       return;
+
+trunc:
+       ND_PRINT((ndo, " [|rreq"));
 }
 
 static void
-aodv_rrep(netdissect_options *ndo,
-          const union aodv *ap, const u_char *dat, u_int length)
+aodv_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
 {
        u_int i;
+       const struct aodv_rrep *ap = (const struct aodv_rrep *)dat;
 
-       if (ndo->ndo_snapend < dat) {
-               ND_PRINT((ndo, " [|aodv]"));
-               return;
-       }
-       i = min(length, (u_int)(ndo->ndo_snapend - dat));
-       if (i < sizeof(ap->rrep)) {
-               ND_PRINT((ndo, " [|rrep]"));
-               return;
-       }
-       i -= sizeof(ap->rrep);
+       ND_TCHECK(*ap);
+       if (length < sizeof(*ap))
+               goto trunc;
        ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
            "\tdst %s dseq %lu src %s %lu ms", length,
-           ap->rrep.rrep_type & RREP_REPAIR ? "[R]" : "",
-           ap->rrep.rrep_type & RREP_ACK ? "[A] " : " ",
-           ap->rrep.rrep_ps & RREP_PREFIX_MASK,
-           ap->rrep.rrep_hops,
-           ipaddr_string(ndo, &ap->rrep.rrep_da),
-           (unsigned long)EXTRACT_32BITS(&ap->rrep.rrep_ds),
-           ipaddr_string(ndo, &ap->rrep.rrep_oa),
-           (unsigned long)EXTRACT_32BITS(&ap->rrep.rrep_life)));
+           ap->rrep_type & RREP_REPAIR ? "[R]" : "",
+           ap->rrep_type & RREP_ACK ? "[A] " : " ",
+           ap->rrep_ps & RREP_PREFIX_MASK,
+           ap->rrep_hops,
+           ipaddr_string(ndo, &ap->rrep_da),
+           (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
+           ipaddr_string(ndo, &ap->rrep_oa),
+           (unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
+       i = length - sizeof(*ap);
        if (i >= sizeof(struct aodv_ext))
-               aodv_extension(ndo, (void *)(&ap->rrep + 1), i);
+               aodv_extension(ndo, (const struct aodv_ext *)(dat + 
sizeof(*ap)), i);
+       return;
+
+trunc:
+       ND_PRINT((ndo, " [|rreq"));
 }
 
 static void
-aodv_rerr(netdissect_options *ndo,
-          const union aodv *ap, const u_char *dat, u_int length)
+aodv_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
 {
-       u_int i;
-       const struct rerr_unreach *dp = NULL;
-       int n, trunc;
+       u_int i, dc;
+       const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
+       const struct rerr_unreach *dp;
 
-       if (ndo->ndo_snapend < dat) {
-               ND_PRINT((ndo, " [|aodv]"));
-               return;
-       }
-       i = min(length, (u_int)(ndo->ndo_snapend - dat));
-       if (i < offsetof(struct aodv_rerr, r)) {
-               ND_PRINT((ndo, " [|rerr]"));
-               return;
-       }
-       i -= offsetof(struct aodv_rerr, r);
-       dp = &ap->rerr.r.dest[0];
-       n = ap->rerr.rerr_dc * sizeof(ap->rerr.r.dest[0]);
+       ND_TCHECK(*ap);
+       if (length < sizeof(*ap))
+               goto trunc;
        ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
-           ap->rerr.rerr_flags & RERR_NODELETE ? "[D]" : "",
-           ap->rerr.rerr_dc, length));
-       trunc = n - (i/sizeof(ap->rerr.r.dest[0]));
-       for (; i >= sizeof(ap->rerr.r.dest[0]);
-           ++dp, i -= sizeof(ap->rerr.r.dest[0])) {
+           ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
+           ap->rerr_dc, length));
+       dp = (struct rerr_unreach *)(dat + sizeof(*ap));
+       i = length - sizeof(*ap);
+       for (dc = ap->rerr_dc; dc != 0; dc--) {
+               ND_TCHECK(*dp);
+               if (i < sizeof(*dp))
+                       goto trunc;
                ND_PRINT((ndo, " {%s}(%ld)", ipaddr_string(ndo, &dp->u_da),
                    (unsigned long)EXTRACT_32BITS(&dp->u_ds)));
+               dp++;
+               i -= sizeof(*dp);
        }
-       if (trunc)
-               ND_PRINT((ndo, "[|rerr]"));
+       return;
+
+trunc:
+       ND_PRINT((ndo, "[|rerr]"));
 }
 
 static void
 #ifdef INET6
-aodv_v6_rreq(netdissect_options *ndo,
-             const union aodv *ap, const u_char *dat, u_int length)
+aodv_v6_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
 #else
-aodv_v6_rreq(netdissect_options *ndo,
-             const union aodv *ap _U_, const u_char *dat _U_, u_int length)
+aodv_v6_rreq(netdissect_options *ndo, const u_char *dat _U_, u_int length)
 #endif
 {
 #ifdef INET6
        u_int i;
+       const struct aodv_rreq6 *ap = (const struct aodv_rreq6 *)dat;
 
-       if (ndo->ndo_snapend < dat) {
-               ND_PRINT((ndo, " [|aodv]"));
-               return;
-       }
-       i = min(length, (u_int)(ndo->ndo_snapend - dat));
-       if (i < sizeof(ap->rreq6)) {
-               ND_PRINT((ndo, " [|rreq6]"));
-               return;
-       }
-       i -= sizeof(ap->rreq6);
+       ND_TCHECK(*ap);
+       if (length < sizeof(*ap))
+               goto trunc;
        ND_PRINT((ndo, " v6 rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
            "\tdst %s seq %lu src %s seq %lu", length,
-           ap->rreq6.rreq_type & RREQ_JOIN ? "[J]" : "",
-           ap->rreq6.rreq_type & RREQ_REPAIR ? "[R]" : "",
-           ap->rreq6.rreq_type & RREQ_GRAT ? "[G]" : "",
-           ap->rreq6.rreq_type & RREQ_DEST ? "[D]" : "",
-           ap->rreq6.rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
-           ap->rreq6.rreq_hops,
-           (unsigned long)EXTRACT_32BITS(&ap->rreq6.rreq_id),
-           ip6addr_string(ndo, &ap->rreq6.rreq_da),
-           (unsigned long)EXTRACT_32BITS(&ap->rreq6.rreq_ds),
-           ip6addr_string(ndo, &ap->rreq6.rreq_oa),
-           (unsigned long)EXTRACT_32BITS(&ap->rreq6.rreq_os)));
+           ap->rreq_type & RREQ_JOIN ? "[J]" : "",
+           ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
+           ap->rreq_type & RREQ_GRAT ? "[G]" : "",
+           ap->rreq_type & RREQ_DEST ? "[D]" : "",
+           ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
+           ap->rreq_hops,
+           (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
+           ip6addr_string(ndo, &ap->rreq_da),
+           (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
+           ip6addr_string(ndo, &ap->rreq_oa),
+           (unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
+       i = length - sizeof(*ap);
        if (i >= sizeof(struct aodv_ext))
-               aodv_extension(ndo, (void *)(&ap->rreq6 + 1), i);
+               aodv_extension(ndo, (const struct aodv_ext *)(dat + 
sizeof(*ap)), i);
+       return;
+
+trunc:
+       ND_PRINT((ndo, " [|rreq"));
 #else
        ND_PRINT((ndo, " v6 rreq %u", length));
 #endif
@@ -370,38 +333,35 @@ aodv_v6_rreq(netdissect_options *ndo,
 
 static void
 #ifdef INET6
-aodv_v6_rrep(netdissect_options *ndo,
-             const union aodv *ap, const u_char *dat, u_int length)
+aodv_v6_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
 #else
-aodv_v6_rrep(netdissect_options *ndo,
-             const union aodv *ap _U_, const u_char *dat _U_, u_int length)
+aodv_v6_rrep(netdissect_options *ndo, const u_char *dat _U_, u_int length)
 #endif
 {
 #ifdef INET6
        u_int i;
+       const struct aodv_rrep6 *ap = (const struct aodv_rrep6 *)dat;
 
-       if (ndo->ndo_snapend < dat) {
-               ND_PRINT((ndo, " [|aodv]"));
-               return;
-       }
-       i = min(length, (u_int)(ndo->ndo_snapend - dat));
-       if (i < sizeof(ap->rrep6)) {
-               ND_PRINT((ndo, " [|rrep6]"));
-               return;
-       }
-       i -= sizeof(ap->rrep6);
+       ND_TCHECK(*ap);
+       if (length < sizeof(*ap))
+               goto trunc;
        ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
           "\tdst %s dseq %lu src %s %lu ms", length,
-           ap->rrep6.rrep_type & RREP_REPAIR ? "[R]" : "",
-           ap->rrep6.rrep_type & RREP_ACK ? "[A] " : " ",
-           ap->rrep6.rrep_ps & RREP_PREFIX_MASK,
-           ap->rrep6.rrep_hops,
-           ip6addr_string(ndo, &ap->rrep6.rrep_da),
-           (unsigned long)EXTRACT_32BITS(&ap->rrep6.rrep_ds),
-           ip6addr_string(ndo, &ap->rrep6.rrep_oa),
-           (unsigned long)EXTRACT_32BITS(&ap->rrep6.rrep_life)));
+           ap->rrep_type & RREP_REPAIR ? "[R]" : "",
+           ap->rrep_type & RREP_ACK ? "[A] " : " ",
+           ap->rrep_ps & RREP_PREFIX_MASK,
+           ap->rrep_hops,
+           ip6addr_string(ndo, &ap->rrep_da),
+           (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
+           ip6addr_string(ndo, &ap->rrep_oa),
+           (unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
+       i = length - sizeof(*ap);
        if (i >= sizeof(struct aodv_ext))
-               aodv_extension(ndo, (void *)(&ap->rrep6 + 1), i);
+               aodv_extension(ndo, (const struct aodv_ext *)(dat + 
sizeof(*ap)), i);
+       return;
+
+trunc:
+       ND_PRINT((ndo, " [|rreq"));
 #else
        ND_PRINT((ndo, " rrep %u", length));
 #endif
@@ -409,31 +369,37 @@ aodv_v6_rrep(netdissect_options *ndo,
 
 static void
 #ifdef INET6
-aodv_v6_rerr(netdissect_options *ndo,
-             const union aodv *ap, u_int length)
+aodv_v6_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
 #else
-aodv_v6_rerr(netdissect_options *ndo,
-             const union aodv *ap _U_, u_int length)
+aodv_v6_rerr(netdissect_options *ndo, const u_char *dat _U_, u_int length)
 #endif
 {
 #ifdef INET6
-       const struct rerr_unreach6 *dp6 = NULL;
-       int i, j, n, trunc;
+       u_int i, dc;
+       const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
+       const struct rerr_unreach6 *dp6;
 
-       i = length - offsetof(struct aodv_rerr, r);
-       j = sizeof(ap->rerr.r.dest6[0]);
-       dp6 = &ap->rerr.r.dest6[0];
-       n = ap->rerr.rerr_dc * j;
+       ND_TCHECK(*ap);
+       if (length < sizeof(*ap))
+               goto trunc;
        ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
-           ap->rerr.rerr_flags & RERR_NODELETE ? "[D]" : "",
-           ap->rerr.rerr_dc, length));
-       trunc = n - (i/j);
-       for (; i -= j >= 0; ++dp6) {
+           ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
+           ap->rerr_dc, length));
+       dp6 = (struct rerr_unreach6 *)(void *)(ap + 1);
+       i = length - sizeof(*ap);
+       for (dc = ap->rerr_dc; dc != 0; dc--) {
+               ND_TCHECK(*dp6);
+               if (i < sizeof(*dp6))
+                       goto trunc;
                ND_PRINT((ndo, " {%s}(%ld)", ip6addr_string(ndo, &dp6->u_da),
                    (unsigned long)EXTRACT_32BITS(&dp6->u_ds)));
+               dp6++;
+               i -= sizeof(*dp6);
        }
-       if (trunc)
-               ND_PRINT((ndo, "[|rerr]"));
+       return;
+
+trunc:
+       ND_PRINT((ndo, "[|rerr]"));
 #else
        ND_PRINT((ndo, " rerr %u", length));
 #endif
@@ -441,42 +407,38 @@ aodv_v6_rerr(netdissect_options *ndo,
 
 static void
 #ifdef INET6
-aodv_v6_draft_01_rreq(netdissect_options *ndo,
-                      const union aodv *ap, const u_char *dat, u_int length)
+aodv_v6_draft_01_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
 #else
-aodv_v6_draft_01_rreq(netdissect_options *ndo,
-                      const union aodv *ap _U_, const u_char *dat _U_,
-    u_int length)
+aodv_v6_draft_01_rreq(netdissect_options *ndo, const u_char *dat _U_, u_int 
length)
 #endif
 {
 #ifdef INET6
        u_int i;
+       const struct aodv_rreq6_draft_01 *ap = (const struct 
aodv_rreq6_draft_01 *)dat;
 
-       if (ndo->ndo_snapend < dat) {
-               ND_PRINT((ndo, " [|aodv]"));
-               return;
-       }
-       i = min(length, (u_int)(ndo->ndo_snapend - dat));
-       if (i < sizeof(ap->rreq6_draft_01)) {
-               ND_PRINT((ndo, " [|rreq6]"));
-               return;
-       }
-       i -= sizeof(ap->rreq6_draft_01);
+       ND_TCHECK(*ap);
+       if (length < sizeof(*ap))
+               goto trunc;
        ND_PRINT((ndo, " rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
            "\tdst %s seq %lu src %s seq %lu", length,
-           ap->rreq6_draft_01.rreq_type & RREQ_JOIN ? "[J]" : "",
-           ap->rreq6_draft_01.rreq_type & RREQ_REPAIR ? "[R]" : "",
-           ap->rreq6_draft_01.rreq_type & RREQ_GRAT ? "[G]" : "",
-           ap->rreq6_draft_01.rreq_type & RREQ_DEST ? "[D]" : "",
-           ap->rreq6_draft_01.rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
-           ap->rreq6_draft_01.rreq_hops,
-           (unsigned long)EXTRACT_32BITS(&ap->rreq6_draft_01.rreq_id),
-           ip6addr_string(ndo, &ap->rreq6_draft_01.rreq_da),
-           (unsigned long)EXTRACT_32BITS(&ap->rreq6_draft_01.rreq_ds),
-           ip6addr_string(ndo, &ap->rreq6_draft_01.rreq_oa),
-           (unsigned long)EXTRACT_32BITS(&ap->rreq6_draft_01.rreq_os)));
+           ap->rreq_type & RREQ_JOIN ? "[J]" : "",
+           ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
+           ap->rreq_type & RREQ_GRAT ? "[G]" : "",
+           ap->rreq_type & RREQ_DEST ? "[D]" : "",
+           ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
+           ap->rreq_hops,
+           (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
+           ip6addr_string(ndo, &ap->rreq_da),
+           (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
+           ip6addr_string(ndo, &ap->rreq_oa),
+           (unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
+       i = length - sizeof(*ap);
        if (i >= sizeof(struct aodv_ext))
-               aodv_extension(ndo, (void *)(&ap->rreq6_draft_01 + 1), i);
+               aodv_extension(ndo, (const struct aodv_ext *)(dat + 
sizeof(*ap)), i);
+       return;
+
+trunc:
+       ND_PRINT((ndo, " [|rreq"));
 #else
        ND_PRINT((ndo, " rreq %u", length));
 #endif
@@ -484,39 +446,35 @@ aodv_v6_draft_01_rreq(netdissect_options *ndo,
 
 static void
 #ifdef INET6
-aodv_v6_draft_01_rrep(netdissect_options *ndo,
-                      const union aodv *ap, const u_char *dat, u_int length)
+aodv_v6_draft_01_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
 #else
-aodv_v6_draft_01_rrep(netdissect_options *ndo,
-                      const union aodv *ap _U_, const u_char *dat _U_,
-    u_int length)
+aodv_v6_draft_01_rrep(netdissect_options *ndo, const u_char *dat _U_, u_int 
length)
 #endif
 {
 #ifdef INET6
        u_int i;
+       const struct aodv_rrep6_draft_01 *ap = (const struct 
aodv_rrep6_draft_01 *)dat;
 
-       if (ndo->ndo_snapend < dat) {
-               ND_PRINT((ndo, " [|aodv]"));
-               return;
-       }
-       i = min(length, (u_int)(ndo->ndo_snapend - dat));
-       if (i < sizeof(ap->rrep6_draft_01)) {
-               ND_PRINT((ndo, " [|rrep6]"));
-               return;
-       }
-       i -= sizeof(ap->rrep6_draft_01);
+       ND_TCHECK(*ap);
+       if (length < sizeof(*ap))
+               goto trunc;
        ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
           "\tdst %s dseq %lu src %s %lu ms", length,
-           ap->rrep6_draft_01.rrep_type & RREP_REPAIR ? "[R]" : "",
-           ap->rrep6_draft_01.rrep_type & RREP_ACK ? "[A] " : " ",
-           ap->rrep6_draft_01.rrep_ps & RREP_PREFIX_MASK,
-           ap->rrep6_draft_01.rrep_hops,
-           ip6addr_string(ndo, &ap->rrep6_draft_01.rrep_da),
-           (unsigned long)EXTRACT_32BITS(&ap->rrep6_draft_01.rrep_ds),
-           ip6addr_string(ndo, &ap->rrep6_draft_01.rrep_oa),
-           (unsigned long)EXTRACT_32BITS(&ap->rrep6_draft_01.rrep_life)));
+           ap->rrep_type & RREP_REPAIR ? "[R]" : "",
+           ap->rrep_type & RREP_ACK ? "[A] " : " ",
+           ap->rrep_ps & RREP_PREFIX_MASK,
+           ap->rrep_hops,
+           ip6addr_string(ndo, &ap->rrep_da),
+           (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
+           ip6addr_string(ndo, &ap->rrep_oa),
+           (unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
+       i = length - sizeof(*ap);
        if (i >= sizeof(struct aodv_ext))
-               aodv_extension(ndo, (void *)(&ap->rrep6_draft_01 + 1), i);
+               aodv_extension(ndo, (const struct aodv_ext *)(dat + 
sizeof(*ap)), i);
+       return;
+
+trunc:
+       ND_PRINT((ndo, " [|rreq"));
 #else
        ND_PRINT((ndo, " rrep %u", length));
 #endif
@@ -524,31 +482,37 @@ aodv_v6_draft_01_rrep(netdissect_options *ndo,
 
 static void
 #ifdef INET6
-aodv_v6_draft_01_rerr(netdissect_options *ndo,
-                      const union aodv *ap, u_int length)
+aodv_v6_draft_01_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
 #else
-aodv_v6_draft_01_rerr(netdissect_options *ndo,
-                      const union aodv *ap _U_, u_int length)
+aodv_v6_draft_01_rerr(netdissect_options *ndo, const u_char *dat _U_, u_int 
length)
 #endif
 {
 #ifdef INET6
-       const struct rerr_unreach6_draft_01 *dp6 = NULL;
-       int i, j, n, trunc;
+       u_int i, dc;
+       const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
+       const struct rerr_unreach6_draft_01 *dp6;
 
-       i = length - offsetof(struct aodv_rerr, r);
-       j = sizeof(ap->rerr.r.dest6_draft_01[0]);
-       dp6 = &ap->rerr.r.dest6_draft_01[0];
-       n = ap->rerr.rerr_dc * j;
+       ND_TCHECK(*ap);
+       if (length < sizeof(*ap))
+               goto trunc;
        ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
-           ap->rerr.rerr_flags & RERR_NODELETE ? "[D]" : "",
-           ap->rerr.rerr_dc, length));
-       trunc = n - (i/j);
-       for (; i -= j >= 0; ++dp6) {
+           ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
+           ap->rerr_dc, length));
+       dp6 = (struct rerr_unreach6_draft_01 *)(void *)(ap + 1);
+       i = length - sizeof(*ap);
+       for (dc = ap->rerr_dc; dc != 0; dc--) {
+               ND_TCHECK(*dp6);
+               if (i < sizeof(*dp6))
+                       goto trunc;
                ND_PRINT((ndo, " {%s}(%ld)", ip6addr_string(ndo, &dp6->u_da),
                    (unsigned long)EXTRACT_32BITS(&dp6->u_ds)));
+               dp6++;
+               i -= sizeof(*dp6);
        }
-       if (trunc)
-               ND_PRINT((ndo, "[|rerr]"));
+       return;
+
+trunc:
+       ND_PRINT((ndo, "[|rerr]"));
 #else
        ND_PRINT((ndo, " rerr %u", length));
 #endif
@@ -558,40 +522,37 @@ void
 aodv_print(netdissect_options *ndo,
            const u_char *dat, u_int length, int is_ip6)
 {
-       const union aodv *ap;
-
-       ap = (union aodv *)dat;
-       if (ndo->ndo_snapend < dat) {
-               ND_PRINT((ndo, " [|aodv]"));
-               return;
-       }
-       if (min(length, (u_int)(ndo->ndo_snapend - dat)) < 
sizeof(ap->rrep_ack)) {
-               ND_PRINT((ndo, " [|aodv]"));
-               return;
-       }
+       uint8_t msg_type;
+
+       /*
+        * The message type is the first byte; make sure we have it
+        * and then fetch it.
+        */
+       ND_TCHECK(*dat);
+       msg_type = *dat;
        ND_PRINT((ndo, " aodv"));
 
-       switch (ap->rerr.rerr_type) {
+       switch (msg_type) {
 
        case AODV_RREQ:
                if (is_ip6)
-                       aodv_v6_rreq(ndo, ap, dat, length);
+                       aodv_v6_rreq(ndo, dat, length);
                else
-                       aodv_rreq(ndo, ap, dat, length);
+                       aodv_rreq(ndo, dat, length);
                break;
 
        case AODV_RREP:
                if (is_ip6)
-                       aodv_v6_rrep(ndo, ap, dat, length);
+                       aodv_v6_rrep(ndo, dat, length);
                else
-                       aodv_rrep(ndo, ap, dat, length);
+                       aodv_rrep(ndo, dat, length);
                break;
 
        case AODV_RERR:
                if (is_ip6)
-                       aodv_v6_rerr(ndo, ap, length);
+                       aodv_v6_rerr(ndo, dat, length);
                else
-                       aodv_rerr(ndo, ap, dat, length);
+                       aodv_rerr(ndo, dat, length);
                break;
 
        case AODV_RREP_ACK:
@@ -599,15 +560,15 @@ aodv_print(netdissect_options *ndo,
                break;
 
        case AODV_V6_DRAFT_01_RREQ:
-               aodv_v6_draft_01_rreq(ndo, ap, dat, length);
+               aodv_v6_draft_01_rreq(ndo, dat, length);
                break;
 
        case AODV_V6_DRAFT_01_RREP:
-               aodv_v6_draft_01_rrep(ndo, ap, dat, length);
+               aodv_v6_draft_01_rrep(ndo, dat, length);
                break;
 
        case AODV_V6_DRAFT_01_RERR:
-               aodv_v6_draft_01_rerr(ndo, ap, length);
+               aodv_v6_draft_01_rerr(ndo, dat, length);
                break;
 
        case AODV_V6_DRAFT_01_RREP_ACK:
@@ -615,6 +576,10 @@ aodv_print(netdissect_options *ndo,
                break;
 
        default:
-               ND_PRINT((ndo, " %u %u", ap->rreq.rreq_type, length));
+               ND_PRINT((ndo, " type %u %u", msg_type, length));
        }
+       return;
+
+trunc:
+       ND_PRINT((ndo, " [|aodv]"));
 }




Reply via email to