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gre: add support for MikroTik Ethernet-over-IP hack.
[tcpdump] / print-icmp6.c
diff --git a/print-icmp6.c b/print-icmp6.c
index 2440790452e82cdc5525094c7530d364beacfd96..ae2596aca37fd0d6a9acd517a2cabd88c8e57dd3 100644 (file)
--- a/print-icmp6.c
+++ b/print-icmp6.c
@@ -41,7 +41,7 @@
 #include "udp.h"
 #include "ah.h"
 
 #include "udp.h"
 #include "ah.h"
 
-/*     NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp   */
+/*     NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp   */
 /*     $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $  */
 
 /*
 /*     $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $  */
 
 /*
@@ -103,7 +103,7 @@ struct icmp6_hdr {
 #define ICMP6_ECHO_REQUEST             128     /* echo service */
 #define ICMP6_ECHO_REPLY               129     /* echo reply */
 #define ICMP6_MEMBERSHIP_QUERY         130     /* group membership query */
 #define ICMP6_ECHO_REQUEST             128     /* echo service */
 #define ICMP6_ECHO_REPLY               129     /* echo reply */
 #define ICMP6_MEMBERSHIP_QUERY         130     /* group membership query */
-#define MLD6_LISTENER_QUERY            130     /* multicast listener query */
+#define MLD6_LISTENER_QUERY            130     /* multicast listener query */
 #define ICMP6_MEMBERSHIP_REPORT                131     /* group membership report */
 #define MLD6_LISTENER_REPORT           131     /* multicast listener report */
 #define ICMP6_MEMBERSHIP_REDUCTION     132     /* group membership termination */
 #define ICMP6_MEMBERSHIP_REPORT                131     /* group membership report */
 #define MLD6_LISTENER_REPORT           131     /* multicast listener report */
 #define ICMP6_MEMBERSHIP_REDUCTION     132     /* group membership termination */
@@ -145,10 +145,10 @@ struct icmp6_hdr {
 #define ICMP6_DST_UNREACH_ADDR         3       /* address unreachable */
 #define ICMP6_DST_UNREACH_NOPORT       4       /* port unreachable */
 
 #define ICMP6_DST_UNREACH_ADDR         3       /* address unreachable */
 #define ICMP6_DST_UNREACH_NOPORT       4       /* port unreachable */
 
-#define ICMP6_TIME_EXCEED_TRANSIT      0       /* ttl==0 in transit */
+#define ICMP6_TIME_EXCEED_TRANSIT      0       /* ttl==0 in transit */
 #define ICMP6_TIME_EXCEED_REASSEMBLY   1       /* ttl==0 in reass */
 
 #define ICMP6_TIME_EXCEED_REASSEMBLY   1       /* ttl==0 in reass */
 
-#define ICMP6_PARAMPROB_HEADER                 0       /* erroneous header field */
+#define ICMP6_PARAMPROB_HEADER         0       /* erroneous header field */
 #define ICMP6_PARAMPROB_NEXTHEADER     1       /* unrecognized next header */
 #define ICMP6_PARAMPROB_OPTION         2       /* unrecognized option */
 #define ICMP6_PARAMPROB_FRAGHDRCHAIN   3       /* incomplete header chain */
 #define ICMP6_PARAMPROB_NEXTHEADER     1       /* unrecognized next header */
 #define ICMP6_PARAMPROB_OPTION         2       /* unrecognized option */
 #define ICMP6_PARAMPROB_FRAGHDRCHAIN   3       /* incomplete header chain */
@@ -193,7 +193,7 @@ struct mld6_hdr {
  */
 
 struct nd_router_solicit {     /* router solicitation */
  */
 
 struct nd_router_solicit {     /* router solicitation */
-       struct icmp6_hdr        nd_rs_hdr;
+       struct icmp6_hdr        nd_rs_hdr;
        /* could be followed by options */
 };
 
        /* could be followed by options */
 };
 
@@ -394,18 +394,13 @@ struct icmp6_nodeinfo {
 #define NI_QTYPE_NODEADDR      3 /* Node Addresses */
 #define NI_QTYPE_IPV4ADDR      4 /* IPv4 Addresses */
 
 #define NI_QTYPE_NODEADDR      3 /* Node Addresses */
 #define NI_QTYPE_IPV4ADDR      4 /* IPv4 Addresses */
 
-/* network endian */
-#define NI_SUPTYPE_FLAG_COMPRESS       ((uint16_t)htons(0x1))
-#define NI_FQDN_FLAG_VALIDTTL          ((uint16_t)htons(0x1))
-
-/* network endian */
-#define NI_NODEADDR_FLAG_TRUNCATE      ((uint16_t)htons(0x1))
-#define NI_NODEADDR_FLAG_ALL           ((uint16_t)htons(0x2))
-#define NI_NODEADDR_FLAG_COMPAT                ((uint16_t)htons(0x4))
-#define NI_NODEADDR_FLAG_LINKLOCAL     ((uint16_t)htons(0x8))
-#define NI_NODEADDR_FLAG_SITELOCAL     ((uint16_t)htons(0x10))
-#define NI_NODEADDR_FLAG_GLOBAL                ((uint16_t)htons(0x20))
-#define NI_NODEADDR_FLAG_ANYCAST       ((uint16_t)htons(0x40)) /* just experimental. not in spec */
+#define NI_NODEADDR_FLAG_TRUNCATE      0x0001
+#define NI_NODEADDR_FLAG_ALL           0x0002
+#define NI_NODEADDR_FLAG_COMPAT                0x0004
+#define NI_NODEADDR_FLAG_LINKLOCAL     0x0008
+#define NI_NODEADDR_FLAG_SITELOCAL     0x0010
+#define NI_NODEADDR_FLAG_GLOBAL                0x0020
+#define NI_NODEADDR_FLAG_ANYCAST       0x0040 /* just experimental. not in spec */
 
 struct ni_reply_fqdn {
        nd_uint32_t ni_fqdn_ttl;        /* TTL */
 
 struct ni_reply_fqdn {
        nd_uint32_t ni_fqdn_ttl;        /* TTL */
@@ -432,7 +427,7 @@ struct icmp6_router_renum { /* router renumbering header */
 #define rr_type                rr_hdr.icmp6_type
 #define rr_code                rr_hdr.icmp6_code
 #define rr_cksum       rr_hdr.icmp6_cksum
 #define rr_type                rr_hdr.icmp6_type
 #define rr_code                rr_hdr.icmp6_code
 #define rr_cksum       rr_hdr.icmp6_cksum
-#define rr_seqnum      rr_hdr.icmp6_data32[0]
+#define rr_seqnum      rr_hdr.icmp6_data32[0]
 
 struct rr_pco_match {          /* match prefix part */
        nd_uint8_t              rpm_code;
 
 struct rr_pco_match {          /* match prefix part */
        nd_uint8_t              rpm_code;
@@ -490,10 +485,6 @@ static void dnsname_print(netdissect_options *ndo, const u_char *, const u_char
 static void icmp6_nodeinfo_print(netdissect_options *ndo, u_int, const u_char *, const u_char *);
 static void icmp6_rrenum_print(netdissect_options *ndo, const u_char *, const u_char *);
 
 static void icmp6_nodeinfo_print(netdissect_options *ndo, u_int, const u_char *, const u_char *);
 static void icmp6_rrenum_print(netdissect_options *ndo, const u_char *, const u_char *);
 
-#ifndef abs
-#define abs(a) ((0 < (a)) ? (a) : -(a))
-#endif
-
 /*
  * DIO: Updated to RFC6550, as published in 2012: section 6. (page 30)
  */
 /*
  * DIO: Updated to RFC6550, as published in 2012: section 6. (page 30)
  */
@@ -711,7 +702,6 @@ static const struct tok icmp6_nd_na_flag_values[] = {
     { 0,       NULL }
 };
 
     { 0,       NULL }
 };
 
-
 static const struct tok icmp6_opt_values[] = {
    { ND_OPT_SOURCE_LINKADDR, "source link-address"},
    { ND_OPT_TARGET_LINKADDR, "destination link-address"},
 static const struct tok icmp6_opt_values[] = {
    { ND_OPT_SOURCE_LINKADDR, "source link-address"},
    { ND_OPT_TARGET_LINKADDR, "destination link-address"},
@@ -821,15 +811,15 @@ rpl_printopts(netdissect_options *ndo, const uint8_t *opts, u_int length)
                         optlen = 1;
                         ND_PRINT(" opt:pad1");
                 } else {
                         optlen = 1;
                         ND_PRINT(" opt:pad1");
                 } else {
-                       if (length < RPL_GENOPTION_LEN)
-                               goto trunc;
+                       if (length < RPL_GENOPTION_LEN)
+                               goto trunc;
                        optlen = GET_U_1(opt->rpl_dio_len)+RPL_GENOPTION_LEN;
                         ND_PRINT(" opt:%s len:%u ",
                                   tok2str(rpl_subopt_values, "subopt:%u", dio_type),
                                   optlen);
                         ND_TCHECK_LEN(opt, optlen);
                         if (length < optlen)
                        optlen = GET_U_1(opt->rpl_dio_len)+RPL_GENOPTION_LEN;
                         ND_PRINT(" opt:%s len:%u ",
                                   tok2str(rpl_subopt_values, "subopt:%u", dio_type),
                                   optlen);
                         ND_TCHECK_LEN(opt, optlen);
                         if (length < optlen)
-                               goto trunc;
+                               goto trunc;
                         if (ndo->ndo_vflag > 2) {
                                 hex_print(ndo,
                                           " ",
                         if (ndo->ndo_vflag > 2) {
                                 hex_print(ndo,
                                           " ",
@@ -843,7 +833,6 @@ rpl_printopts(netdissect_options *ndo, const uint8_t *opts, u_int length)
         return;
 trunc:
        nd_print_trunc(ndo);
         return;
 trunc:
        nd_print_trunc(ndo);
-       return;
 }
 
 static void
 }
 
 static void
@@ -851,28 +840,25 @@ rpl_dio_print(netdissect_options *ndo,
               const u_char *bp, u_int length)
 {
         const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp;
               const u_char *bp, u_int length)
 {
         const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp;
-        const char *dagid_str;
-
-        ND_TCHECK_SIZE(dio);
-        dagid_str = ip6addr_string (ndo, dio->rpl_dagid);
 
 
+        ND_ICHECK_ZU(length, <, sizeof(struct nd_rpl_dio));
         ND_PRINT(" [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
         ND_PRINT(" [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
-                  dagid_str,
+                  GET_IP6ADDR_STRING(dio->rpl_dagid),
                   GET_U_1(dio->rpl_dtsn),
                   GET_U_1(dio->rpl_instanceid),
                   GET_BE_U_2(dio->rpl_dagrank),
                   RPL_DIO_GROUNDED(GET_U_1(dio->rpl_mopprf)) ? "grounded,":"",
                   GET_U_1(dio->rpl_dtsn),
                   GET_U_1(dio->rpl_instanceid),
                   GET_BE_U_2(dio->rpl_dagrank),
                   RPL_DIO_GROUNDED(GET_U_1(dio->rpl_mopprf)) ? "grounded,":"",
-                  tok2str(rpl_mop_values, "mop%u", RPL_DIO_MOP(GET_U_1(dio->rpl_mopprf))),
+                  tok2str(rpl_mop_values, "mop%u",
+                          RPL_DIO_MOP(GET_U_1(dio->rpl_mopprf))),
                   RPL_DIO_PRF(GET_U_1(dio->rpl_mopprf)));
 
         if(ndo->ndo_vflag > 1) {
                 rpl_printopts(ndo, bp + sizeof(struct nd_rpl_dio),
                               length - sizeof(struct nd_rpl_dio));
         }
                   RPL_DIO_PRF(GET_U_1(dio->rpl_mopprf)));
 
         if(ndo->ndo_vflag > 1) {
                 rpl_printopts(ndo, bp + sizeof(struct nd_rpl_dio),
                               length - sizeof(struct nd_rpl_dio));
         }
-       return;
-trunc:
-       nd_print_trunc(ndo);
-       return;
+        return;
+invalid:
+        nd_print_invalid(ndo);
 }
 
 static void
 }
 
 static void
@@ -883,23 +869,19 @@ rpl_dao_print(netdissect_options *ndo,
         const char *dagid_str = "<elided>";
         uint8_t rpl_flags;
 
         const char *dagid_str = "<elided>";
         uint8_t rpl_flags;
 
-        ND_TCHECK_SIZE(dao);
-        if (length < ND_RPL_DAO_MIN_LEN)
-               goto tooshort;
+        ND_ICHECK_U(length, <, ND_RPL_DAO_MIN_LEN);
 
         bp += ND_RPL_DAO_MIN_LEN;
         length -= ND_RPL_DAO_MIN_LEN;
         rpl_flags = GET_U_1(dao->rpl_flags);
         if(RPL_DAO_D(rpl_flags)) {
 
         bp += ND_RPL_DAO_MIN_LEN;
         length -= ND_RPL_DAO_MIN_LEN;
         rpl_flags = GET_U_1(dao->rpl_flags);
         if(RPL_DAO_D(rpl_flags)) {
-                ND_TCHECK_LEN(dao->rpl_dagid, DAGID_LEN);
-                if (length < DAGID_LEN)
-                       goto tooshort;
-                dagid_str = ip6addr_string (ndo, dao->rpl_dagid);
+                ND_ICHECK_U(length, <, DAGID_LEN);
+                dagid_str = GET_IP6ADDR_STRING(dao->rpl_dagid);
                 bp += DAGID_LEN;
                 length -= DAGID_LEN;
         }
 
                 bp += DAGID_LEN;
                 length -= DAGID_LEN;
         }
 
-        ND_PRINT(" [dagid:%s,seq:%u,instance:%u%s%s,%02x]",
+        ND_PRINT(" [dagid:%s,seq:%u,instance:%u%s%s,flags:%02x]",
                   dagid_str,
                   GET_U_1(dao->rpl_daoseq),
                   GET_U_1(dao->rpl_instanceid),
                   dagid_str,
                   GET_U_1(dao->rpl_daoseq),
                   GET_U_1(dao->rpl_instanceid),
@@ -910,15 +892,9 @@ rpl_dao_print(netdissect_options *ndo,
         if(ndo->ndo_vflag > 1) {
                 rpl_printopts(ndo, bp, length);
         }
         if(ndo->ndo_vflag > 1) {
                 rpl_printopts(ndo, bp, length);
         }
-       return;
-
-trunc:
-       nd_print_trunc(ndo);
-       return;
-
-tooshort:
-       ND_PRINT(" [|length too short]");
-       return;
+        return;
+invalid:
+        nd_print_invalid(ndo);
 }
 
 static void
 }
 
 static void
@@ -928,17 +904,13 @@ rpl_daoack_print(netdissect_options *ndo,
         const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp;
         const char *dagid_str = "<elided>";
 
         const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp;
         const char *dagid_str = "<elided>";
 
-        ND_TCHECK_LEN(daoack, ND_RPL_DAOACK_MIN_LEN);
-        if (length < ND_RPL_DAOACK_MIN_LEN)
-               goto tooshort;
+        ND_ICHECK_U(length, <, ND_RPL_DAOACK_MIN_LEN);
 
         bp += ND_RPL_DAOACK_MIN_LEN;
         length -= ND_RPL_DAOACK_MIN_LEN;
         if(RPL_DAOACK_D(GET_U_1(daoack->rpl_flags))) {
 
         bp += ND_RPL_DAOACK_MIN_LEN;
         length -= ND_RPL_DAOACK_MIN_LEN;
         if(RPL_DAOACK_D(GET_U_1(daoack->rpl_flags))) {
-                ND_TCHECK_LEN(daoack->rpl_dagid, DAGID_LEN);
-                if (length < DAGID_LEN)
-                       goto tooshort;
-                dagid_str = ip6addr_string (ndo, daoack->rpl_dagid);
+                ND_ICHECK_U(length, <, DAGID_LEN);
+                dagid_str = GET_IP6ADDR_STRING(daoack->rpl_dagid);
                 bp += DAGID_LEN;
                 length -= DAGID_LEN;
         }
                 bp += DAGID_LEN;
                 length -= DAGID_LEN;
         }
@@ -953,15 +925,9 @@ rpl_daoack_print(netdissect_options *ndo,
         if(ndo->ndo_vflag > 1) {
                 rpl_printopts(ndo, bp, length);
         }
         if(ndo->ndo_vflag > 1) {
                 rpl_printopts(ndo, bp, length);
         }
-       return;
-
-trunc:
-       nd_print_trunc(ndo);
-       return;
-
-tooshort:
-       ND_PRINT(" [|dao-length too short]");
-       return;
+        return;
+invalid:
+        nd_print_invalid(ndo);
 }
 
 static void
 }
 
 static void
@@ -1021,7 +987,6 @@ trunc:
 
 }
 
 
 }
 
-
 void
 icmp6_print(netdissect_options *ndo,
             const u_char *bp, u_int length, const u_char *bp2, int fragmented)
 void
 icmp6_print(netdissect_options *ndo,
             const u_char *bp, u_int length, const u_char *bp2, int fragmented)
@@ -1168,7 +1133,6 @@ icmp6_print(netdissect_options *ndo,
                break;
        case ICMP6_ECHO_REQUEST:
        case ICMP6_ECHO_REPLY:
                break;
        case ICMP6_ECHO_REQUEST:
        case ICMP6_ECHO_REPLY:
-                /* The check below covers both icmp6_id and icmp6_seq. */
                 ND_PRINT(", id %u, seq %u", GET_BE_U_2(dp->icmp6_id),
                         GET_BE_U_2(dp->icmp6_seq));
                break;
                 ND_PRINT(", id %u, seq %u", GET_BE_U_2(dp->icmp6_id),
                         GET_BE_U_2(dp->icmp6_seq));
                break;
@@ -1364,8 +1328,7 @@ get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot)
                        if (ND_TTEST_2(uh->uh_dport)) {
                                *prot = nh;
                                return(uh);
                        if (ND_TTEST_2(uh->uh_dport)) {
                                *prot = nh;
                                return(uh);
-                       }
-                       else
+                       } else
                                return(NULL);
                        /* NOTREACHED */
 
                                return(NULL);
                        /* NOTREACHED */
 
@@ -1493,8 +1456,7 @@ icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
                        ND_PRINT(" lifetime %us, domain(s):",
                                   GET_BE_U_4(opds->nd_opt_dnssl_lifetime));
                        domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
                        ND_PRINT(" lifetime %us, domain(s):",
                                   GET_BE_U_4(opds->nd_opt_dnssl_lifetime));
                        domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
-                       while (domp < cp + (opt_len << 3) && GET_U_1(domp) != '\0')
-                       {
+                       while (domp < cp + (opt_len << 3) && GET_U_1(domp) != '\0') {
                                ND_PRINT(" ");
                                if ((domp = fqdn_print(ndo, domp, bp)) == NULL)
                                        goto trunc;
                                ND_PRINT(" ");
                                if ((domp = fqdn_print(ndo, domp, bp)) == NULL)
                                        goto trunc;
@@ -1519,17 +1481,15 @@ icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
                        case 1:
                                break;
                        case 2:
                        case 1:
                                break;
                        case 2:
-                               ND_TCHECK_8(opri + 1);
-                               memcpy(&in6, opri + 1, 8);
+                               GET_CPY_BYTES(&in6, opri + 1, 8);
                                break;
                        case 3:
                                break;
                        case 3:
-                               ND_TCHECK_16(opri + 1);
-                               memcpy(&in6, opri + 1, 16);
+                               GET_CPY_BYTES(&in6, opri + 1, 16);
                                break;
                        default:
                                goto trunc;
                        }
                                break;
                        default:
                                goto trunc;
                        }
-                       ND_PRINT(" %s/%u", ip6addr_string(ndo, (const u_char *)&in6),
+                       ND_PRINT(" %s/%u", ip6addr_string(ndo, (const u_char *)&in6), /* local buffer, not packet data; don't use GET_IP6ADDR_STRING() */
                                   GET_U_1(opri->nd_opt_rti_prefixlen));
                        ND_PRINT(", pref=%s",
                                 get_rtpref(GET_U_1(opri->nd_opt_rti_flags)));
                                   GET_U_1(opri->nd_opt_rti_prefixlen));
                        ND_PRINT(", pref=%s",
                                 get_rtpref(GET_U_1(opri->nd_opt_rti_flags)));
@@ -1648,7 +1608,6 @@ mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
     ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + 8));
 
     if (ndo->ndo_vflag) {
     ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + 8));
 
     if (ndo->ndo_vflag) {
-        ND_TCHECK_1(bp + 25);
        if (GET_U_1(bp + 24) & 0x08) {
                ND_PRINT(" sflag");
        }
        if (GET_U_1(bp + 24) & 0x08) {
                ND_PRINT(" sflag");
        }
@@ -1678,10 +1637,6 @@ mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
                 ND_PRINT(", %u source(s)", nsrcs);
     }
     ND_PRINT("]");
                 ND_PRINT(", %u source(s)", nsrcs);
     }
     ND_PRINT("]");
-    return;
-trunc:
-    nd_print_trunc(ndo);
-    return;
 }
 
 static void
 }
 
 static void
@@ -1790,7 +1745,6 @@ icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp,
                        break;
                }
 
                        break;
                }
 
-
                /* XXX backward compat, icmp-name-lookup-03 */
                if (siz == sizeof(*ni6)) {
                        ND_PRINT(", 03 draft");
                /* XXX backward compat, icmp-name-lookup-03 */
                if (siz == sizeof(*ni6)) {
                        ND_PRINT(", 03 draft");
@@ -1985,16 +1939,16 @@ icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep)
        ND_TCHECK_4(rr6->rr_reserved);
        switch (GET_U_1(rr6->rr_code)) {
        case ICMP6_ROUTER_RENUMBERING_COMMAND:
        ND_TCHECK_4(rr6->rr_reserved);
        switch (GET_U_1(rr6->rr_code)) {
        case ICMP6_ROUTER_RENUMBERING_COMMAND:
-               ND_PRINT("router renum: command");
+               ND_PRINT(", command");
                break;
        case ICMP6_ROUTER_RENUMBERING_RESULT:
                break;
        case ICMP6_ROUTER_RENUMBERING_RESULT:
-               ND_PRINT("router renum: result");
+               ND_PRINT(", result");
                break;
        case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
                break;
        case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
-               ND_PRINT("router renum: sequence number reset");
+               ND_PRINT(", sequence number reset");
                break;
        default:
                break;
        default:
-               ND_PRINT("router renum: code-#%u", GET_U_1(rr6->rr_code));
+               ND_PRINT(", code-#%u", GET_U_1(rr6->rr_code));
                break;
        }
 
                break;
        }
 
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