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CVE-2017-13034/PGM: Add a bounds check.
[tcpdump] / print-pgm.c
diff --git a/print-pgm.c b/print-pgm.c
index b6138c6fdd4a6d76314381eee68b5095eb847914..8340f2c3eb43f5d05f0ba7048f78efbfa84e6635 100644 (file)
--- a/print-pgm.c
+++ b/print-pgm.c
@@ -13,91 +13,84 @@
  * Original code by Andy Heffernan ([email protected])
  */
 
  * Original code by Andy Heffernan ([email protected])
  */
 
-#ifndef lint
-static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-pgm.c,v 1.5 2005-06-07 22:05:58 guy Exp $";
-#endif
+/* \summary: Pragmatic General Multicast (PGM) printer */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include <tcpdump-stdinc.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+#include <netdissect-stdinc.h>
 
 
-#include "interface.h"
+#include "netdissect.h"
 #include "extract.h"
 #include "addrtoname.h"
 #include "extract.h"
 #include "addrtoname.h"
+#include "addrtostr.h"
 
 #include "ip.h"
 
 #include "ip.h"
-#ifdef INET6
 #include "ip6.h"
 #include "ip6.h"
-#endif
 #include "ipproto.h"
 #include "ipproto.h"
+#include "af.h"
 
 /*
  * PGM header (RFC 3208)
  */
 struct pgm_header {
 
 /*
  * PGM header (RFC 3208)
  */
 struct pgm_header {
-    u_int16_t  pgm_sport;
-    u_int16_t  pgm_dport;
-    u_int8_t   pgm_type;
-    u_int8_t   pgm_options;
-    u_int16_t  pgm_sum;
-    u_int8_t   pgm_gsid[6];
-    u_int16_t  pgm_length;
+    uint16_t   pgm_sport;
+    uint16_t   pgm_dport;
+    uint8_t    pgm_type;
+    uint8_t    pgm_options;
+    uint16_t   pgm_sum;
+    uint8_t    pgm_gsid[6];
+    uint16_t   pgm_length;
 };
 
 struct pgm_spm {
 };
 
 struct pgm_spm {
-    u_int32_t  pgms_seq;
-    u_int32_t  pgms_trailseq;
-    u_int32_t  pgms_leadseq;
-    u_int16_t  pgms_nla_afi;
-    u_int16_t  pgms_reserved;
-    /* ... u_int8_t    pgms_nla[0]; */
+    uint32_t   pgms_seq;
+    uint32_t   pgms_trailseq;
+    uint32_t   pgms_leadseq;
+    uint16_t   pgms_nla_afi;
+    uint16_t   pgms_reserved;
+    /* ... uint8_t     pgms_nla[0]; */
     /* ... options */
 };
 
 struct pgm_nak {
     /* ... options */
 };
 
 struct pgm_nak {
-    u_int32_t  pgmn_seq;
-    u_int16_t  pgmn_source_afi;
-    u_int16_t  pgmn_reserved;
-    /* ... u_int8_t    pgmn_source[0]; */
-    /* ... u_int16_t   pgmn_group_afi */
-    /* ... u_int16_t   pgmn_reserved2; */
-    /* ... u_int8_t    pgmn_group[0]; */
+    uint32_t   pgmn_seq;
+    uint16_t   pgmn_source_afi;
+    uint16_t   pgmn_reserved;
+    /* ... uint8_t     pgmn_source[0]; */
+    /* ... uint16_t    pgmn_group_afi */
+    /* ... uint16_t    pgmn_reserved2; */
+    /* ... uint8_t     pgmn_group[0]; */
     /* ... options */
 };
 
 struct pgm_ack {
     /* ... options */
 };
 
 struct pgm_ack {
-    u_int32_t  pgma_rx_max_seq;
-    u_int32_t  pgma_bitmap;
+    uint32_t   pgma_rx_max_seq;
+    uint32_t   pgma_bitmap;
     /* ... options */
 };
 
 struct pgm_poll {
     /* ... options */
 };
 
 struct pgm_poll {
-    u_int32_t  pgmp_seq;
-    u_int16_t  pgmp_round;
-    u_int16_t  pgmp_reserved;
+    uint32_t   pgmp_seq;
+    uint16_t   pgmp_round;
+    uint16_t   pgmp_reserved;
     /* ... options */
 };
 
 struct pgm_polr {
     /* ... options */
 };
 
 struct pgm_polr {
-    u_int32_t  pgmp_seq;
-    u_int16_t  pgmp_round;
-    u_int16_t  pgmp_subtype;
-    u_int16_t  pgmp_nla_afi;
-    u_int16_t  pgmp_reserved;
-    /* ... u_int8_t    pgmp_nla[0]; */
+    uint32_t   pgmp_seq;
+    uint16_t   pgmp_round;
+    uint16_t   pgmp_subtype;
+    uint16_t   pgmp_nla_afi;
+    uint16_t   pgmp_reserved;
+    /* ... uint8_t     pgmp_nla[0]; */
     /* ... options */
 };
 
 struct pgm_data {
     /* ... options */
 };
 
 struct pgm_data {
-    u_int32_t  pgmd_seq;
-    u_int32_t  pgmd_trailseq;
+    uint32_t   pgmd_seq;
+    uint32_t   pgmd_trailseq;
     /* ... options */
 };
 
     /* ... options */
 };
 
@@ -142,345 +135,299 @@ typedef enum _pgm_type {
 
 #define PGM_OPT_PGMCC_DATA     0x12
 #define PGM_OPT_PGMCC_FEEDBACK 0x13
 
 #define PGM_OPT_PGMCC_DATA     0x12
 #define PGM_OPT_PGMCC_FEEDBACK 0x13
-     
+
 #define PGM_OPT_MASK           0x7f
 
 #define PGM_OPT_END            0x80    /* end of options marker */
 
 #define PGM_MIN_OPT_LEN                4
 
 #define PGM_OPT_MASK           0x7f
 
 #define PGM_OPT_END            0x80    /* end of options marker */
 
 #define PGM_MIN_OPT_LEN                4
 
-#ifndef AFI_IP
-#define AFI_IP         1
-#define AFI_IP6                2
-#endif
-
 void
 void
-pgm_print(register const u_char *bp, register u_int length,
-         register const u_char *bp2)
+pgm_print(netdissect_options *ndo,
+          register const u_char *bp, register u_int length,
+          register const u_char *bp2)
 {
        register const struct pgm_header *pgm;
        register const struct ip *ip;
        register char ch;
 {
        register const struct pgm_header *pgm;
        register const struct ip *ip;
        register char ch;
-       u_int16_t sport, dport;
-       int addr_size;
-       const void *nla;
-       int nla_af;
-#ifdef INET6
+       uint16_t sport, dport;
+       u_int nla_afnum;
        char nla_buf[INET6_ADDRSTRLEN];
        register const struct ip6_hdr *ip6;
        char nla_buf[INET6_ADDRSTRLEN];
        register const struct ip6_hdr *ip6;
-#else
-       char nla_buf[INET_ADDRSTRLEN];
-#endif
-       u_int8_t opt_type, opt_len;
-       u_int32_t seq, opts_len, len, offset;
+       uint8_t opt_type, opt_len;
+       uint32_t seq, opts_len, len, offset;
 
 
-       pgm = (struct pgm_header *)bp;
-       ip = (struct ip *)bp2;
-#ifdef INET6
+       pgm = (const struct pgm_header *)bp;
+       ip = (const struct ip *)bp2;
        if (IP_V(ip) == 6)
        if (IP_V(ip) == 6)
-               ip6 = (struct ip6_hdr *)bp2;
+               ip6 = (const struct ip6_hdr *)bp2;
        else
                ip6 = NULL;
        else
                ip6 = NULL;
-#else /* INET6 */
-       if (IP_V(ip) == 6) {
-               (void)printf("Can't handle IPv6");
-               return;
-       }
-#endif /* INET6 */
        ch = '\0';
        ch = '\0';
-       if (!TTEST(pgm->pgm_dport)) {
-#ifdef INET6
+       if (!ND_TTEST(pgm->pgm_dport)) {
                if (ip6) {
                if (ip6) {
-                       (void)printf("%s > %s: [|pgm]",
-                               ip6addr_string(&ip6->ip6_src),
-                               ip6addr_string(&ip6->ip6_dst));
-                       return;
-               } else
-#endif /* INET6 */
-               {
-                       (void)printf("%s > %s: [|pgm]",
-                               ipaddr_string(&ip->ip_src),
-                               ipaddr_string(&ip->ip_dst));
-                       return;
+                       ND_PRINT((ndo, "%s > %s: [|pgm]",
+                               ip6addr_string(ndo, &ip6->ip6_src),
+                               ip6addr_string(ndo, &ip6->ip6_dst)));
+               } else {
+                       ND_PRINT((ndo, "%s > %s: [|pgm]",
+                               ipaddr_string(ndo, &ip->ip_src),
+                               ipaddr_string(ndo, &ip->ip_dst)));
                }
                }
+               return;
        }
 
        sport = EXTRACT_16BITS(&pgm->pgm_sport);
        dport = EXTRACT_16BITS(&pgm->pgm_dport);
 
        }
 
        sport = EXTRACT_16BITS(&pgm->pgm_sport);
        dport = EXTRACT_16BITS(&pgm->pgm_dport);
 
-#ifdef INET6
        if (ip6) {
                if (ip6->ip6_nxt == IPPROTO_PGM) {
        if (ip6) {
                if (ip6->ip6_nxt == IPPROTO_PGM) {
-                       (void)printf("%s.%s > %s.%s: ",
-                               ip6addr_string(&ip6->ip6_src),
-                               tcpport_string(sport),
-                               ip6addr_string(&ip6->ip6_dst),
-                               tcpport_string(dport));
+                       ND_PRINT((ndo, "%s.%s > %s.%s: ",
+                               ip6addr_string(ndo, &ip6->ip6_src),
+                               tcpport_string(ndo, sport),
+                               ip6addr_string(ndo, &ip6->ip6_dst),
+                               tcpport_string(ndo, dport)));
                } else {
                } else {
-                       (void)printf("%s > %s: ",
-                               tcpport_string(sport), tcpport_string(dport));
+                       ND_PRINT((ndo, "%s > %s: ",
+                               tcpport_string(ndo, sport), tcpport_string(ndo, dport)));
                }
                }
-       } else
-#endif /*INET6*/
-       {
+       } else {
                if (ip->ip_p == IPPROTO_PGM) {
                if (ip->ip_p == IPPROTO_PGM) {
-                       (void)printf("%s.%s > %s.%s: ",
-                               ipaddr_string(&ip->ip_src),
-                               tcpport_string(sport),
-                               ipaddr_string(&ip->ip_dst),
-                               tcpport_string(dport));
+                       ND_PRINT((ndo, "%s.%s > %s.%s: ",
+                               ipaddr_string(ndo, &ip->ip_src),
+                               tcpport_string(ndo, sport),
+                               ipaddr_string(ndo, &ip->ip_dst),
+                               tcpport_string(ndo, dport)));
                } else {
                } else {
-                       (void)printf("%s > %s: ",
-                               tcpport_string(sport), tcpport_string(dport));
+                       ND_PRINT((ndo, "%s > %s: ",
+                               tcpport_string(ndo, sport), tcpport_string(ndo, dport)));
                }
        }
 
                }
        }
 
-       TCHECK(*pgm);
+       ND_TCHECK(*pgm);
 
 
-        (void)printf("PGM, length %u", EXTRACT_16BITS(&pgm->pgm_length));
+        ND_PRINT((ndo, "PGM, length %u", EXTRACT_16BITS(&pgm->pgm_length)));
 
 
-        if (!vflag)
+        if (!ndo->ndo_vflag)
             return;
 
             return;
 
-       (void)printf(" 0x%02x%02x%02x%02x%02x%02x ",
+       ND_PRINT((ndo, " 0x%02x%02x%02x%02x%02x%02x ",
                     pgm->pgm_gsid[0],
                      pgm->pgm_gsid[1],
                      pgm->pgm_gsid[2],
                     pgm->pgm_gsid[3],
                      pgm->pgm_gsid[4],
                     pgm->pgm_gsid[0],
                      pgm->pgm_gsid[1],
                      pgm->pgm_gsid[2],
                     pgm->pgm_gsid[3],
                      pgm->pgm_gsid[4],
-                     pgm->pgm_gsid[5]);
+                     pgm->pgm_gsid[5]));
        switch (pgm->pgm_type) {
        case PGM_SPM: {
        switch (pgm->pgm_type) {
        case PGM_SPM: {
-           struct pgm_spm *spm;
+           const struct pgm_spm *spm;
 
 
-           spm = (struct pgm_spm *)(pgm + 1);
-           TCHECK(*spm);
+           spm = (const struct pgm_spm *)(pgm + 1);
+           ND_TCHECK(*spm);
+           bp = (const u_char *) (spm + 1);
 
            switch (EXTRACT_16BITS(&spm->pgms_nla_afi)) {
 
            switch (EXTRACT_16BITS(&spm->pgms_nla_afi)) {
-           case AFI_IP:
-               addr_size = sizeof(struct in_addr);
-               nla_af = AF_INET;
+           case AFNUM_INET:
+               ND_TCHECK2(*bp, sizeof(struct in_addr));
+               addrtostr(bp, nla_buf, sizeof(nla_buf));
+               bp += sizeof(struct in_addr);
                break;
                break;
-#ifdef INET6
-           case AFI_IP6:
-               addr_size = sizeof(struct in6_addr);
-               nla_af = AF_INET6;
+           case AFNUM_INET6:
+               ND_TCHECK2(*bp, sizeof(struct in6_addr));
+               addrtostr6(bp, nla_buf, sizeof(nla_buf));
+               bp += sizeof(struct in6_addr);
                break;
                break;
-#endif
            default:
                goto trunc;
                break;
            }
            default:
                goto trunc;
                break;
            }
-           bp = (u_char *) (spm + 1);
-           TCHECK2(*bp, addr_size);
-           nla = bp;
-           bp += addr_size;
 
 
-           inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));
-           (void)printf("SPM seq %u trail %u lead %u nla %s",
+           ND_PRINT((ndo, "SPM seq %u trail %u lead %u nla %s",
                         EXTRACT_32BITS(&spm->pgms_seq),
                          EXTRACT_32BITS(&spm->pgms_trailseq),
                         EXTRACT_32BITS(&spm->pgms_leadseq),
                         EXTRACT_32BITS(&spm->pgms_seq),
                          EXTRACT_32BITS(&spm->pgms_trailseq),
                         EXTRACT_32BITS(&spm->pgms_leadseq),
-                         nla_buf);
+                         nla_buf));
            break;
        }
 
        case PGM_POLL: {
            break;
        }
 
        case PGM_POLL: {
-           struct pgm_poll *poll;
-
-           poll = (struct pgm_poll *)(pgm + 1);
-           TCHECK(*poll);
-           (void)printf("POLL seq %u round %u",
-                        EXTRACT_32BITS(&poll->pgmp_seq),
-                         EXTRACT_16BITS(&poll->pgmp_round));
-           bp = (u_char *) (poll + 1);
+           const struct pgm_poll *poll_msg;
+
+           poll_msg = (const struct pgm_poll *)(pgm + 1);
+           ND_TCHECK(*poll_msg);
+           ND_PRINT((ndo, "POLL seq %u round %u",
+                        EXTRACT_32BITS(&poll_msg->pgmp_seq),
+                         EXTRACT_16BITS(&poll_msg->pgmp_round)));
+           bp = (const u_char *) (poll_msg + 1);
            break;
        }
        case PGM_POLR: {
            break;
        }
        case PGM_POLR: {
-           struct pgm_polr *polr;
-           u_int32_t ivl, rnd, mask;
+           const struct pgm_polr *polr;
+           uint32_t ivl, rnd, mask;
 
 
-           polr = (struct pgm_polr *)(pgm + 1);
-           TCHECK(*polr);
+           polr = (const struct pgm_polr *)(pgm + 1);
+           ND_TCHECK(*polr);
+           bp = (const u_char *) (polr + 1);
 
            switch (EXTRACT_16BITS(&polr->pgmp_nla_afi)) {
 
            switch (EXTRACT_16BITS(&polr->pgmp_nla_afi)) {
-           case AFI_IP:
-               addr_size = sizeof(struct in_addr);
-               nla_af = AF_INET;
+           case AFNUM_INET:
+               ND_TCHECK2(*bp, sizeof(struct in_addr));
+               addrtostr(bp, nla_buf, sizeof(nla_buf));
+               bp += sizeof(struct in_addr);
                break;
                break;
-#ifdef INET6
-           case AFI_IP6:
-               addr_size = sizeof(struct in6_addr);
-               nla_af = AF_INET6;
+           case AFNUM_INET6:
+               ND_TCHECK2(*bp, sizeof(struct in6_addr));
+               addrtostr6(bp, nla_buf, sizeof(nla_buf));
+               bp += sizeof(struct in6_addr);
                break;
                break;
-#endif
            default:
                goto trunc;
                break;
            }
            default:
                goto trunc;
                break;
            }
-           bp = (u_char *) (polr + 1);
-           TCHECK2(*bp, addr_size);
-           nla = bp;
-           bp += addr_size;
 
 
-           inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));
-
-           TCHECK2(*bp, sizeof(u_int32_t));
+           ND_TCHECK2(*bp, sizeof(uint32_t));
            ivl = EXTRACT_32BITS(bp);
            ivl = EXTRACT_32BITS(bp);
-           bp += sizeof(u_int32_t);
+           bp += sizeof(uint32_t);
 
 
-           TCHECK2(*bp, sizeof(u_int32_t));
+           ND_TCHECK2(*bp, sizeof(uint32_t));
            rnd = EXTRACT_32BITS(bp);
            rnd = EXTRACT_32BITS(bp);
-           bp += sizeof(u_int32_t);
+           bp += sizeof(uint32_t);
 
 
-           TCHECK2(*bp, sizeof(u_int32_t));
+           ND_TCHECK2(*bp, sizeof(uint32_t));
            mask = EXTRACT_32BITS(bp);
            mask = EXTRACT_32BITS(bp);
-           bp += sizeof(u_int32_t);
+           bp += sizeof(uint32_t);
 
 
-           (void)printf("POLR seq %u round %u nla %s ivl %u rnd 0x%08x "
+           ND_PRINT((ndo, "POLR seq %u round %u nla %s ivl %u rnd 0x%08x "
                         "mask 0x%08x", EXTRACT_32BITS(&polr->pgmp_seq),
                         "mask 0x%08x", EXTRACT_32BITS(&polr->pgmp_seq),
-                        EXTRACT_16BITS(&polr->pgmp_round), nla_buf, ivl, rnd, mask);
+                        EXTRACT_16BITS(&polr->pgmp_round), nla_buf, ivl, rnd, mask));
            break;
        }
        case PGM_ODATA: {
            break;
        }
        case PGM_ODATA: {
-           struct pgm_data *odata;
+           const struct pgm_data *odata;
 
 
-           odata = (struct pgm_data *)(pgm + 1);
-           TCHECK(*odata);
-           (void)printf("ODATA trail %u seq %u",
+           odata = (const struct pgm_data *)(pgm + 1);
+           ND_TCHECK(*odata);
+           ND_PRINT((ndo, "ODATA trail %u seq %u",
                         EXTRACT_32BITS(&odata->pgmd_trailseq),
                         EXTRACT_32BITS(&odata->pgmd_trailseq),
-                        EXTRACT_32BITS(&odata->pgmd_seq));
-           bp = (u_char *) (odata + 1);
+                        EXTRACT_32BITS(&odata->pgmd_seq)));
+           bp = (const u_char *) (odata + 1);
            break;
        }
 
        case PGM_RDATA: {
            break;
        }
 
        case PGM_RDATA: {
-           struct pgm_data *rdata;
+           const struct pgm_data *rdata;
 
 
-           rdata = (struct pgm_data *)(pgm + 1);
-           TCHECK(*rdata);
-           (void)printf("RDATA trail %u seq %u",
+           rdata = (const struct pgm_data *)(pgm + 1);
+           ND_TCHECK(*rdata);
+           ND_PRINT((ndo, "RDATA trail %u seq %u",
                         EXTRACT_32BITS(&rdata->pgmd_trailseq),
                         EXTRACT_32BITS(&rdata->pgmd_trailseq),
-                        EXTRACT_32BITS(&rdata->pgmd_seq));
-           bp = (u_char *) (rdata + 1);
+                        EXTRACT_32BITS(&rdata->pgmd_seq)));
+           bp = (const u_char *) (rdata + 1);
            break;
        }
 
        case PGM_NAK:
        case PGM_NULLNAK:
        case PGM_NCF: {
            break;
        }
 
        case PGM_NAK:
        case PGM_NULLNAK:
        case PGM_NCF: {
-           struct pgm_nak *nak;
-           const void *source, *group;
-           int source_af, group_af;
-#ifdef INET6
+           const struct pgm_nak *nak;
            char source_buf[INET6_ADDRSTRLEN], group_buf[INET6_ADDRSTRLEN];
            char source_buf[INET6_ADDRSTRLEN], group_buf[INET6_ADDRSTRLEN];
-#else
-           char source_buf[INET_ADDRSTRLEN], group_buf[INET_ADDRSTRLEN];
-#endif
 
 
-           nak = (struct pgm_nak *)(pgm + 1);
-           TCHECK(*nak);
+           nak = (const struct pgm_nak *)(pgm + 1);
+           ND_TCHECK(*nak);
+           bp = (const u_char *) (nak + 1);
 
            /*
             * Skip past the source, saving info along the way
             * and stopping if we don't have enough.
             */
            switch (EXTRACT_16BITS(&nak->pgmn_source_afi)) {
 
            /*
             * Skip past the source, saving info along the way
             * and stopping if we don't have enough.
             */
            switch (EXTRACT_16BITS(&nak->pgmn_source_afi)) {
-           case AFI_IP:
-               addr_size = sizeof(struct in_addr);
-               source_af = AF_INET;
+           case AFNUM_INET:
+               ND_TCHECK2(*bp, sizeof(struct in_addr));
+               addrtostr(bp, source_buf, sizeof(source_buf));
+               bp += sizeof(struct in_addr);
                break;
                break;
-#ifdef INET6
-           case AFI_IP6:
-               addr_size = sizeof(struct in6_addr);
-               source_af = AF_INET6;
+           case AFNUM_INET6:
+               ND_TCHECK2(*bp, sizeof(struct in6_addr));
+               addrtostr6(bp, source_buf, sizeof(source_buf));
+               bp += sizeof(struct in6_addr);
                break;
                break;
-#endif
            default:
                goto trunc;
                break;
            }
            default:
                goto trunc;
                break;
            }
-           bp = (u_char *) (nak + 1);
-           TCHECK2(*bp, addr_size);
-           source = bp;
-           bp += addr_size;
 
            /*
             * Skip past the group, saving info along the way
             * and stopping if we don't have enough.
             */
 
            /*
             * Skip past the group, saving info along the way
             * and stopping if we don't have enough.
             */
+           bp += (2 * sizeof(uint16_t));
+           ND_TCHECK_16BITS(bp);
            switch (EXTRACT_16BITS(bp)) {
            switch (EXTRACT_16BITS(bp)) {
-           case AFI_IP:
-               addr_size = sizeof(struct in_addr);
-               group_af = AF_INET;
+           case AFNUM_INET:
+               ND_TCHECK2(*bp, sizeof(struct in_addr));
+               addrtostr(bp, group_buf, sizeof(group_buf));
+               bp += sizeof(struct in_addr);
                break;
                break;
-#ifdef INET6
-           case AFI_IP6:
-               addr_size = sizeof(struct in6_addr);
-               group_af = AF_INET6;
+           case AFNUM_INET6:
+               ND_TCHECK2(*bp, sizeof(struct in6_addr));
+               addrtostr6(bp, group_buf, sizeof(group_buf));
+               bp += sizeof(struct in6_addr);
                break;
                break;
-#endif
            default:
                goto trunc;
                break;
            }
            default:
                goto trunc;
                break;
            }
-           bp += (2 * sizeof(u_int16_t));
-           TCHECK2(*bp, addr_size);
-           group = bp;
-           bp += addr_size;
 
            /*
             * Options decoding can go here.
             */
 
            /*
             * Options decoding can go here.
             */
-           inet_ntop(source_af, source, source_buf, sizeof(source_buf));
-           inet_ntop(group_af, group, group_buf, sizeof(group_buf));
            switch (pgm->pgm_type) {
                case PGM_NAK:
            switch (pgm->pgm_type) {
                case PGM_NAK:
-                   (void)printf("NAK ");
+                   ND_PRINT((ndo, "NAK "));
                    break;
                case PGM_NULLNAK:
                    break;
                case PGM_NULLNAK:
-                   (void)printf("NNAK ");
+                   ND_PRINT((ndo, "NNAK "));
                    break;
                case PGM_NCF:
                    break;
                case PGM_NCF:
-                   (void)printf("NCF ");
+                   ND_PRINT((ndo, "NCF "));
                    break;
                default:
                     break;
            }
                    break;
                default:
                     break;
            }
-           (void)printf("(%s -> %s), seq %u",
-                        source_buf, group_buf, EXTRACT_32BITS(&nak->pgmn_seq));
+           ND_PRINT((ndo, "(%s -> %s), seq %u",
+                        source_buf, group_buf, EXTRACT_32BITS(&nak->pgmn_seq)));
            break;
        }
 
        case PGM_ACK: {
            break;
        }
 
        case PGM_ACK: {
-           struct pgm_ack *ack;
+           const struct pgm_ack *ack;
 
 
-           ack = (struct pgm_ack *)(pgm + 1);
-           TCHECK(*ack);
-           (void)printf("ACK seq %u",
-                        EXTRACT_32BITS(&ack->pgma_rx_max_seq));
-           bp = (u_char *) (ack + 1);
+           ack = (const struct pgm_ack *)(pgm + 1);
+           ND_TCHECK(*ack);
+           ND_PRINT((ndo, "ACK seq %u",
+                        EXTRACT_32BITS(&ack->pgma_rx_max_seq)));
+           bp = (const u_char *) (ack + 1);
            break;
        }
 
        case PGM_SPMR:
            break;
        }
 
        case PGM_SPMR:
-           (void)printf("SPMR");
+           ND_PRINT((ndo, "SPMR"));
            break;
 
        default:
            break;
 
        default:
-           (void)printf("UNKNOWN type 0x%02x", pgm->pgm_type);
+           ND_PRINT((ndo, "UNKNOWN type 0x%02x", pgm->pgm_type));
            break;
 
        }
            break;
 
        }
-       if (pgm->pgm_options & PGM_OPT_BIT_PRESENT) {      
+       if (pgm->pgm_options & PGM_OPT_BIT_PRESENT) {
 
            /*
             * make sure there's enough for the first option header
             */
 
            /*
             * make sure there's enough for the first option header
             */
-           if (!TTEST2(*bp, PGM_MIN_OPT_LEN)) {
-               (void)printf("[|OPT]");
+           if (!ND_TTEST2(*bp, PGM_MIN_OPT_LEN)) {
+               ND_PRINT((ndo, "[|OPT]"));
                return;
                return;
-           } 
+           }
 
            /*
             * That option header MUST be an OPT_LENGTH option
 
            /*
             * That option header MUST be an OPT_LENGTH option
@@ -488,325 +435,385 @@ pgm_print(register const u_char *bp, register u_int length,
             */
            opt_type = *bp++;
            if ((opt_type & PGM_OPT_MASK) != PGM_OPT_LENGTH) {
             */
            opt_type = *bp++;
            if ((opt_type & PGM_OPT_MASK) != PGM_OPT_LENGTH) {
-               (void)printf("[First option bad, should be PGM_OPT_LENGTH, is %u]", opt_type & PGM_OPT_MASK);
+               ND_PRINT((ndo, "[First option bad, should be PGM_OPT_LENGTH, is %u]", opt_type & PGM_OPT_MASK));
                return;
            }
            opt_len = *bp++;
            if (opt_len != 4) {
                return;
            }
            opt_len = *bp++;
            if (opt_len != 4) {
-               (void)printf("[Bad OPT_LENGTH option, length %u != 4]", opt_len);
+               ND_PRINT((ndo, "[Bad OPT_LENGTH option, length %u != 4]", opt_len));
                return;
            }
            opts_len = EXTRACT_16BITS(bp);
            if (opts_len < 4) {
                return;
            }
            opts_len = EXTRACT_16BITS(bp);
            if (opts_len < 4) {
-               (void)printf("[Bad total option length %u < 4]", opts_len);
+               ND_PRINT((ndo, "[Bad total option length %u < 4]", opts_len));
                return;
            }
                return;
            }
-           bp += sizeof(u_int16_t);
-           (void)printf(" OPTS LEN %d", opts_len);
+           bp += sizeof(uint16_t);
+           ND_PRINT((ndo, " OPTS LEN %d", opts_len));
            opts_len -= 4;
 
            while (opts_len) {
                if (opts_len < PGM_MIN_OPT_LEN) {
            opts_len -= 4;
 
            while (opts_len) {
                if (opts_len < PGM_MIN_OPT_LEN) {
-                   (void)printf("[Total option length leaves no room for final option]");
+                   ND_PRINT((ndo, "[Total option length leaves no room for final option]"));
+                   return;
+               }
+               if (!ND_TTEST2(*bp, 2)) {
+                   ND_PRINT((ndo, " [|OPT]"));
                    return;
                }
                opt_type = *bp++;
                opt_len = *bp++;
                if (opt_len < PGM_MIN_OPT_LEN) {
                    return;
                }
                opt_type = *bp++;
                opt_len = *bp++;
                if (opt_len < PGM_MIN_OPT_LEN) {
-                   (void)printf("[Bad option, length %u < %u]", opt_len,
-                       PGM_MIN_OPT_LEN);
+                   ND_PRINT((ndo, "[Bad option, length %u < %u]", opt_len,
+                       PGM_MIN_OPT_LEN));
                    break;
                }
                if (opts_len < opt_len) {
                    break;
                }
                if (opts_len < opt_len) {
-                   (void)printf("[Total option length leaves no room for final option]");
+                   ND_PRINT((ndo, "[Total option length leaves no room for final option]"));
                    return;
                }
                    return;
                }
-               if (!TTEST2(*bp, opt_len - 2)) {
-                   (void)printf(" [|OPT]");
+               if (!ND_TTEST2(*bp, opt_len - 2)) {
+                   ND_PRINT((ndo, " [|OPT]"));
                    return;
                    return;
-               } 
+               }
 
                switch (opt_type & PGM_OPT_MASK) {
                case PGM_OPT_LENGTH:
 
                switch (opt_type & PGM_OPT_MASK) {
                case PGM_OPT_LENGTH:
-                   if (opt_len != 4) {
-                       (void)printf("[Bad OPT_LENGTH option, length %u != 4]", opt_len);
+#define PGM_OPT_LENGTH_LEN     (2+2)
+                   if (opt_len != PGM_OPT_LENGTH_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_LENGTH option, length %u != %u]",
+                           opt_len, PGM_OPT_LENGTH_LEN));
                        return;
                    }
                        return;
                    }
-                   (void)printf(" OPTS LEN (extra?) %d", EXTRACT_16BITS(bp));
-                   bp += sizeof(u_int16_t);
-                   opts_len -= 4;
+                   ND_PRINT((ndo, " OPTS LEN (extra?) %d", EXTRACT_16BITS(bp)));
+                   bp += 2;
+                   opts_len -= PGM_OPT_LENGTH_LEN;
                    break;
 
                case PGM_OPT_FRAGMENT:
                    break;
 
                case PGM_OPT_FRAGMENT:
-                   if (opt_len != 16) {
-                       (void)printf("[Bad OPT_FRAGMENT option, length %u != 16]", opt_len);
+#define PGM_OPT_FRAGMENT_LEN   (2+2+4+4+4)
+                   if (opt_len != PGM_OPT_FRAGMENT_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_FRAGMENT option, length %u != %u]",
+                           opt_len, PGM_OPT_FRAGMENT_LEN));
                        return;
                    }
                    bp += 2;
                    seq = EXTRACT_32BITS(bp);
                        return;
                    }
                    bp += 2;
                    seq = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
+                   bp += 4;
                    offset = EXTRACT_32BITS(bp);
                    offset = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
+                   bp += 4;
                    len = EXTRACT_32BITS(bp);
                    len = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
-                   (void)printf(" FRAG seq %u off %u len %u", seq, offset, len);
-                   opts_len -= 16;
+                   bp += 4;
+                   ND_PRINT((ndo, " FRAG seq %u off %u len %u", seq, offset, len));
+                   opts_len -= PGM_OPT_FRAGMENT_LEN;
                    break;
 
                case PGM_OPT_NAK_LIST:
                    bp += 2;
                    break;
 
                case PGM_OPT_NAK_LIST:
                    bp += 2;
-                   opt_len -= sizeof(u_int32_t);       /* option header */
-                   (void)printf(" NAK LIST");
+                   opt_len -= 4;       /* option header */
+                   ND_PRINT((ndo, " NAK LIST"));
                    while (opt_len) {
                    while (opt_len) {
-                       if (opt_len < sizeof(u_int32_t)) {
-                           (void)printf("[Option length not a multiple of 4]");
+                       if (opt_len < 4) {
+                           ND_PRINT((ndo, "[Option length not a multiple of 4]"));
                            return;
                        }
                            return;
                        }
-                       TCHECK2(*bp, sizeof(u_int32_t));
-                       (void)printf(" %u", EXTRACT_32BITS(bp));
-                       bp += sizeof(u_int32_t);
-                       opt_len -= sizeof(u_int32_t);
-                       opts_len -= sizeof(u_int32_t);
+                       ND_TCHECK2(*bp, 4);
+                       ND_PRINT((ndo, " %u", EXTRACT_32BITS(bp)));
+                       bp += 4;
+                       opt_len -= 4;
+                       opts_len -= 4;
                    }
                    break;
 
                case PGM_OPT_JOIN:
                    }
                    break;
 
                case PGM_OPT_JOIN:
-                   if (opt_len != 8) {
-                       (void)printf("[Bad OPT_JOIN option, length %u != 8]", opt_len);
+#define PGM_OPT_JOIN_LEN       (2+2+4)
+                   if (opt_len != PGM_OPT_JOIN_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_JOIN option, length %u != %u]",
+                           opt_len, PGM_OPT_JOIN_LEN));
                        return;
                    }
                    bp += 2;
                    seq = EXTRACT_32BITS(bp);
                        return;
                    }
                    bp += 2;
                    seq = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
-                   (void)printf(" JOIN %u", seq);
-                   opts_len -= 8;
+                   bp += 4;
+                   ND_PRINT((ndo, " JOIN %u", seq));
+                   opts_len -= PGM_OPT_JOIN_LEN;
                    break;
 
                case PGM_OPT_NAK_BO_IVL:
                    break;
 
                case PGM_OPT_NAK_BO_IVL:
-                   if (opt_len != 12) {
-                       (void)printf("[Bad OPT_NAK_BO_IVL option, length %u != 12]", opt_len);
+#define PGM_OPT_NAK_BO_IVL_LEN (2+2+4+4)
+                   if (opt_len != PGM_OPT_NAK_BO_IVL_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_NAK_BO_IVL option, length %u != %u]",
+                           opt_len, PGM_OPT_NAK_BO_IVL_LEN));
                        return;
                    }
                    bp += 2;
                    offset = EXTRACT_32BITS(bp);
                        return;
                    }
                    bp += 2;
                    offset = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
+                   bp += 4;
                    seq = EXTRACT_32BITS(bp);
                    seq = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
-                   (void)printf(" BACKOFF ivl %u ivlseq %u", offset, seq);
-                   opts_len -= 12;
+                   bp += 4;
+                   ND_PRINT((ndo, " BACKOFF ivl %u ivlseq %u", offset, seq));
+                   opts_len -= PGM_OPT_NAK_BO_IVL_LEN;
                    break;
 
                case PGM_OPT_NAK_BO_RNG:
                    break;
 
                case PGM_OPT_NAK_BO_RNG:
-                   if (opt_len != 12) {
-                       (void)printf("[Bad OPT_NAK_BO_RNG option, length %u != 12]", opt_len);
+#define PGM_OPT_NAK_BO_RNG_LEN (2+2+4+4)
+                   if (opt_len != PGM_OPT_NAK_BO_RNG_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_NAK_BO_RNG option, length %u != %u]",
+                           opt_len, PGM_OPT_NAK_BO_RNG_LEN));
                        return;
                    }
                    bp += 2;
                    offset = EXTRACT_32BITS(bp);
                        return;
                    }
                    bp += 2;
                    offset = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
+                   bp += 4;
                    seq = EXTRACT_32BITS(bp);
                    seq = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
-                   (void)printf(" BACKOFF max %u min %u", offset, seq);
-                   opts_len -= 12;
+                   bp += 4;
+                   ND_PRINT((ndo, " BACKOFF max %u min %u", offset, seq));
+                   opts_len -= PGM_OPT_NAK_BO_RNG_LEN;
                    break;
 
                case PGM_OPT_REDIRECT:
                    break;
 
                case PGM_OPT_REDIRECT:
+#define PGM_OPT_REDIRECT_FIXED_LEN     (2+2+2+2)
+                   if (opt_len < PGM_OPT_REDIRECT_FIXED_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_REDIRECT option, length %u < %u]",
+                           opt_len, PGM_OPT_REDIRECT_FIXED_LEN));
+                       return;
+                   }
                    bp += 2;
                    bp += 2;
-                   switch (EXTRACT_16BITS(bp)) {
-                   case AFI_IP:
-                       addr_size = sizeof(struct in_addr);
-                       nla_af = AF_INET;
+                   nla_afnum = EXTRACT_16BITS(bp);
+                   bp += 2+2;
+                   switch (nla_afnum) {
+                   case AFNUM_INET:
+                       if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in_addr)) {
+                           ND_PRINT((ndo, "[Bad OPT_REDIRECT option, length %u != %u + address size]",
+                               opt_len, PGM_OPT_REDIRECT_FIXED_LEN));
+                           return;
+                       }
+                       ND_TCHECK2(*bp, sizeof(struct in_addr));
+                       addrtostr(bp, nla_buf, sizeof(nla_buf));
+                       bp += sizeof(struct in_addr);
+                       opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in_addr);
                        break;
                        break;
-#ifdef INET6
-                   case AFI_IP6:
-                       addr_size = sizeof(struct in6_addr);
-                       nla_af = AF_INET6;
+                   case AFNUM_INET6:
+                       if (opt_len != PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in6_addr)) {
+                           ND_PRINT((ndo, "[Bad OPT_REDIRECT option, length %u != %u + address size]",
+                               PGM_OPT_REDIRECT_FIXED_LEN, opt_len));
+                           return;
+                       }
+                       ND_TCHECK2(*bp, sizeof(struct in6_addr));
+                       addrtostr6(bp, nla_buf, sizeof(nla_buf));
+                       bp += sizeof(struct in6_addr);
+                       opts_len -= PGM_OPT_REDIRECT_FIXED_LEN + sizeof(struct in6_addr);
                        break;
                        break;
-#endif
                    default:
                        goto trunc;
                        break;
                    }
                    default:
                        goto trunc;
                        break;
                    }
-                   bp += (2 * sizeof(u_int16_t));
-                   if (opt_len != 4 + addr_size) {
-                       (void)printf("[Bad OPT_REDIRECT option, length %u != 4 + address size]", opt_len);
-                       return;
-                   }
-                   TCHECK2(*bp, addr_size);
-                   nla = bp;
-                   bp += addr_size;
 
 
-                   inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));
-                   (void)printf(" REDIRECT %s",  (char *)nla);
-                   opts_len -= 4 + addr_size;
+                   ND_PRINT((ndo, " REDIRECT %s",  nla_buf));
                    break;
 
                case PGM_OPT_PARITY_PRM:
                    break;
 
                case PGM_OPT_PARITY_PRM:
-                   if (opt_len != 8) {
-                       (void)printf("[Bad OPT_PARITY_PRM option, length %u != 8]", opt_len);
+#define PGM_OPT_PARITY_PRM_LEN (2+2+4)
+                   if (opt_len != PGM_OPT_PARITY_PRM_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_PARITY_PRM option, length %u != %u]",
+                           opt_len, PGM_OPT_PARITY_PRM_LEN));
                        return;
                    }
                    bp += 2;
                    len = EXTRACT_32BITS(bp);
                        return;
                    }
                    bp += 2;
                    len = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
-                   (void)printf(" PARITY MAXTGS %u", len);
-                   opts_len -= 8;
+                   bp += 4;
+                   ND_PRINT((ndo, " PARITY MAXTGS %u", len));
+                   opts_len -= PGM_OPT_PARITY_PRM_LEN;
                    break;
 
                case PGM_OPT_PARITY_GRP:
                    break;
 
                case PGM_OPT_PARITY_GRP:
-                   if (opt_len != 8) {
-                       (void)printf("[Bad OPT_PARITY_GRP option, length %u != 8]", opt_len);
+#define PGM_OPT_PARITY_GRP_LEN (2+2+4)
+                   if (opt_len != PGM_OPT_PARITY_GRP_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_PARITY_GRP option, length %u != %u]",
+                           opt_len, PGM_OPT_PARITY_GRP_LEN));
                        return;
                    }
                    bp += 2;
                    seq = EXTRACT_32BITS(bp);
                        return;
                    }
                    bp += 2;
                    seq = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
-                   (void)printf(" PARITY GROUP %u", seq);
-                   opts_len -= 8;
+                   bp += 4;
+                   ND_PRINT((ndo, " PARITY GROUP %u", seq));
+                   opts_len -= PGM_OPT_PARITY_GRP_LEN;
                    break;
 
                case PGM_OPT_CURR_TGSIZE:
                    break;
 
                case PGM_OPT_CURR_TGSIZE:
-                   if (opt_len != 8) {
-                       (void)printf("[Bad OPT_CURR_TGSIZE option, length %u != 8]", opt_len);
+#define PGM_OPT_CURR_TGSIZE_LEN        (2+2+4)
+                   if (opt_len != PGM_OPT_CURR_TGSIZE_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_CURR_TGSIZE option, length %u != %u]",
+                           opt_len, PGM_OPT_CURR_TGSIZE_LEN));
                        return;
                    }
                    bp += 2;
                    len = EXTRACT_32BITS(bp);
                        return;
                    }
                    bp += 2;
                    len = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
-                   (void)printf(" PARITY ATGS %u", len);
-                   opts_len -= 8;
+                   bp += 4;
+                   ND_PRINT((ndo, " PARITY ATGS %u", len));
+                   opts_len -= PGM_OPT_CURR_TGSIZE_LEN;
                    break;
 
                case PGM_OPT_NBR_UNREACH:
                    break;
 
                case PGM_OPT_NBR_UNREACH:
-                   if (opt_len != 4) {
-                       (void)printf("[Bad OPT_NBR_UNREACH option, length %u != 4]", opt_len);
+#define PGM_OPT_NBR_UNREACH_LEN        (2+2)
+                   if (opt_len != PGM_OPT_NBR_UNREACH_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_NBR_UNREACH option, length %u != %u]",
+                           opt_len, PGM_OPT_NBR_UNREACH_LEN));
                        return;
                    }
                    bp += 2;
                        return;
                    }
                    bp += 2;
-                   (void)printf(" NBR_UNREACH");
-                   opts_len -= 4;
+                   ND_PRINT((ndo, " NBR_UNREACH"));
+                   opts_len -= PGM_OPT_NBR_UNREACH_LEN;
                    break;
 
                case PGM_OPT_PATH_NLA:
                    break;
 
                case PGM_OPT_PATH_NLA:
-                   (void)printf(" PATH_NLA [%d]", opt_len);
+                   ND_PRINT((ndo, " PATH_NLA [%d]", opt_len));
                    bp += opt_len;
                    opts_len -= opt_len;
                    break;
 
                case PGM_OPT_SYN:
                    bp += opt_len;
                    opts_len -= opt_len;
                    break;
 
                case PGM_OPT_SYN:
-                   if (opt_len != 4) {
-                       (void)printf("[Bad OPT_SYN option, length %u != 4]", opt_len);
+#define PGM_OPT_SYN_LEN        (2+2)
+                   if (opt_len != PGM_OPT_SYN_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_SYN option, length %u != %u]",
+                           opt_len, PGM_OPT_SYN_LEN));
                        return;
                    }
                    bp += 2;
                        return;
                    }
                    bp += 2;
-                   (void)printf(" SYN");
-                   opts_len -= 4;
+                   ND_PRINT((ndo, " SYN"));
+                   opts_len -= PGM_OPT_SYN_LEN;
                    break;
 
                case PGM_OPT_FIN:
                    break;
 
                case PGM_OPT_FIN:
-                   if (opt_len != 4) {
-                       (void)printf("[Bad OPT_FIN option, length %u != 4]", opt_len);
+#define PGM_OPT_FIN_LEN        (2+2)
+                   if (opt_len != PGM_OPT_FIN_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_FIN option, length %u != %u]",
+                           opt_len, PGM_OPT_FIN_LEN));
                        return;
                    }
                    bp += 2;
                        return;
                    }
                    bp += 2;
-                   (void)printf(" FIN");
-                   opts_len -= 4;
+                   ND_PRINT((ndo, " FIN"));
+                   opts_len -= PGM_OPT_FIN_LEN;
                    break;
 
                case PGM_OPT_RST:
                    break;
 
                case PGM_OPT_RST:
-                   if (opt_len != 4) {
-                       (void)printf("[Bad OPT_RST option, length %u != 4]", opt_len);
+#define PGM_OPT_RST_LEN        (2+2)
+                   if (opt_len != PGM_OPT_RST_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_RST option, length %u != %u]",
+                           opt_len, PGM_OPT_RST_LEN));
                        return;
                    }
                    bp += 2;
                        return;
                    }
                    bp += 2;
-                   (void)printf(" RST");
-                   opts_len -= 4;
+                   ND_PRINT((ndo, " RST"));
+                   opts_len -= PGM_OPT_RST_LEN;
                    break;
 
                case PGM_OPT_CR:
                    break;
 
                case PGM_OPT_CR:
-                   (void)printf(" CR");
+                   ND_PRINT((ndo, " CR"));
                    bp += opt_len;
                    opts_len -= opt_len;
                    break;
 
                case PGM_OPT_CRQST:
                    bp += opt_len;
                    opts_len -= opt_len;
                    break;
 
                case PGM_OPT_CRQST:
-                   if (opt_len != 4) {
-                       (void)printf("[Bad OPT_CRQST option, length %u != 4]", opt_len);
+#define PGM_OPT_CRQST_LEN      (2+2)
+                   if (opt_len != PGM_OPT_CRQST_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_CRQST option, length %u != %u]",
+                           opt_len, PGM_OPT_CRQST_LEN));
                        return;
                    }
                    bp += 2;
                        return;
                    }
                    bp += 2;
-                   (void)printf(" CRQST");
-                   opts_len -= 4;
+                   ND_PRINT((ndo, " CRQST"));
+                   opts_len -= PGM_OPT_CRQST_LEN;
                    break;
 
                case PGM_OPT_PGMCC_DATA:
                    break;
 
                case PGM_OPT_PGMCC_DATA:
+#define PGM_OPT_PGMCC_DATA_FIXED_LEN   (2+2+4+2+2)
+                   if (opt_len < PGM_OPT_PGMCC_DATA_FIXED_LEN) {
+                       ND_PRINT((ndo, "[Bad OPT_PGMCC_DATA option, length %u < %u]",
+                           opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN));
+                       return;
+                   }
                    bp += 2;
                    offset = EXTRACT_32BITS(bp);
                    bp += 2;
                    offset = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
-                   switch (EXTRACT_16BITS(bp)) {
-                   case AFI_IP:
-                       addr_size = sizeof(struct in_addr);
-                       nla_af = AF_INET;
+                   bp += 4;
+                   nla_afnum = EXTRACT_16BITS(bp);
+                   bp += 2+2;
+                   switch (nla_afnum) {
+                   case AFNUM_INET:
+                       if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in_addr)) {
+                           ND_PRINT((ndo, "[Bad OPT_PGMCC_DATA option, length %u != %u + address size]",
+                               opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN));
+                           return;
+                       }
+                       ND_TCHECK2(*bp, sizeof(struct in_addr));
+                       addrtostr(bp, nla_buf, sizeof(nla_buf));
+                       bp += sizeof(struct in_addr);
+                       opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in_addr);
                        break;
                        break;
-#ifdef INET6
-                   case AFI_IP6:
-                       addr_size = sizeof(struct in6_addr);
-                       nla_af = AF_INET6;
+                   case AFNUM_INET6:
+                       if (opt_len != PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in6_addr)) {
+                           ND_PRINT((ndo, "[Bad OPT_PGMCC_DATA option, length %u != %u + address size]",
+                               opt_len, PGM_OPT_PGMCC_DATA_FIXED_LEN));
+                           return;
+                       }
+                       ND_TCHECK2(*bp, sizeof(struct in6_addr));
+                       addrtostr6(bp, nla_buf, sizeof(nla_buf));
+                       bp += sizeof(struct in6_addr);
+                       opts_len -= PGM_OPT_PGMCC_DATA_FIXED_LEN + sizeof(struct in6_addr);
                        break;
                        break;
-#endif
                    default:
                        goto trunc;
                        break;
                    }
                    default:
                        goto trunc;
                        break;
                    }
-                   bp += (2 * sizeof(u_int16_t));
-                   if (opt_len != 12 + addr_size) {
-                       (void)printf("[Bad OPT_PGMCC_DATA option, length %u != 12 + address size]", opt_len);
-                       return;
-                   }
-                   TCHECK2(*bp, addr_size);
-                   nla = bp;
-                   bp += addr_size;
 
 
-                   inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));
-                   (void)printf(" PGMCC DATA %u %s", offset, (char*)nla);
-                   opts_len -= 16;
+                   ND_PRINT((ndo, " PGMCC DATA %u %s", offset, nla_buf));
                    break;
 
                case PGM_OPT_PGMCC_FEEDBACK:
                    break;
 
                case PGM_OPT_PGMCC_FEEDBACK:
+#define PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN       (2+2+4+2+2)
+                   if (opt_len < PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN) {
+                       ND_PRINT((ndo, "[Bad PGM_OPT_PGMCC_FEEDBACK option, length %u < %u]",
+                           opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN));
+                       return;
+                   }
                    bp += 2;
                    offset = EXTRACT_32BITS(bp);
                    bp += 2;
                    offset = EXTRACT_32BITS(bp);
-                   bp += sizeof(u_int32_t);
-                   switch (EXTRACT_16BITS(bp)) {
-                   case AFI_IP:
-                       addr_size = sizeof(struct in_addr);
-                       nla_af = AF_INET;
+                   bp += 4;
+                   nla_afnum = EXTRACT_16BITS(bp);
+                   bp += 2+2;
+                   switch (nla_afnum) {
+                   case AFNUM_INET:
+                       if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in_addr)) {
+                           ND_PRINT((ndo, "[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]",
+                               opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN));
+                           return;
+                       }
+                       ND_TCHECK2(*bp, sizeof(struct in_addr));
+                       addrtostr(bp, nla_buf, sizeof(nla_buf));
+                       bp += sizeof(struct in_addr);
+                       opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in_addr);
                        break;
                        break;
-#ifdef INET6
-                   case AFI_IP6:
-                       addr_size = sizeof(struct in6_addr);
-                       nla_af = AF_INET6;
+                   case AFNUM_INET6:
+                       if (opt_len != PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in6_addr)) {
+                           ND_PRINT((ndo, "[Bad OPT_PGMCC_FEEDBACK option, length %u != %u + address size]",
+                               opt_len, PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN));
+                           return;
+                       }
+                       ND_TCHECK2(*bp, sizeof(struct in6_addr));
+                       addrtostr6(bp, nla_buf, sizeof(nla_buf));
+                       bp += sizeof(struct in6_addr);
+                       opts_len -= PGM_OPT_PGMCC_FEEDBACK_FIXED_LEN + sizeof(struct in6_addr);
                        break;
                        break;
-#endif
                    default:
                        goto trunc;
                        break;
                    }
                    default:
                        goto trunc;
                        break;
                    }
-                   bp += (2 * sizeof(u_int16_t));
-                   if (opt_len != 12 + addr_size) {
-                       (void)printf("[Bad OPT_PGMCC_FEEDBACK option, length %u != 12 + address size]", opt_len);
-                       return;
-                   }
-                   TCHECK2(*bp, addr_size);
-                   nla = bp;
-                   bp += addr_size;
 
 
-                   inet_ntop(nla_af, nla, nla_buf, sizeof(nla_buf));
-                   (void)printf(" PGMCC FEEDBACK %u %s", offset, (char*)nla);
-                   opts_len -= 16;
+                   ND_PRINT((ndo, " PGMCC FEEDBACK %u %s", offset, nla_buf));
                    break;
 
                default:
                    break;
 
                default:
-                   (void)printf(" OPT_%02X [%d] ", opt_type, opt_len);
+                   ND_PRINT((ndo, " OPT_%02X [%d] ", opt_type, opt_len));
                    bp += opt_len;
                    opts_len -= opt_len;
                    break;
                    bp += opt_len;
                    opts_len -= opt_len;
                    break;
@@ -817,15 +824,15 @@ pgm_print(register const u_char *bp, register u_int length,
             }
        }
 
             }
        }
 
-       (void)printf(" [%u]", length);
-       if (packettype == PT_PGM_ZMTP1 &&
+       ND_PRINT((ndo, " [%u]", length));
+       if (ndo->ndo_packettype == PT_PGM_ZMTP1 &&
            (pgm->pgm_type == PGM_ODATA || pgm->pgm_type == PGM_RDATA))
            (pgm->pgm_type == PGM_ODATA || pgm->pgm_type == PGM_RDATA))
-               zmtp1_print_datagram(bp, EXTRACT_16BITS(&pgm->pgm_length));
+               zmtp1_print_datagram(ndo, bp, EXTRACT_16BITS(&pgm->pgm_length));
 
        return;
 
 trunc:
 
        return;
 
 trunc:
-       fputs("[|pgm]", stdout);
+       ND_PRINT((ndo, "[|pgm]"));
        if (ch != '\0')
        if (ch != '\0')
-               putchar('>');
+               ND_PRINT((ndo, ">"));
 }
 }
[mirror] the TCPdump network dissector