| /* |
| * Copyright (C) 1998 and 1999 WIDE Project. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the project nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| /* \summary: IPv6 DHCP printer */ |
| |
| /* |
| * RFC3315: DHCPv6 |
| * supported DHCPv6 options: |
| * RFC3319: Session Initiation Protocol (SIP) Servers options, |
| * RFC3633: IPv6 Prefix options, |
| * RFC3646: DNS Configuration options, |
| * RFC3898: Network Information Service (NIS) Configuration options, |
| * RFC4075: Simple Network Time Protocol (SNTP) Configuration option, |
| * RFC4242: Information Refresh Time option, |
| * RFC4280: Broadcast and Multicast Control Servers options, |
| * RFC5908: Network Time Protocol (NTP) Server Option for DHCPv6 |
| * RFC6334: Dual-Stack Lite option, |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include "netdissect-stdinc.h" |
| |
| #include "netdissect.h" |
| #include "addrtoname.h" |
| #include "extract.h" |
| |
| /* lease duration */ |
| #define DHCP6_DURATION_INFINITE 0xffffffff |
| |
| /* Error Values */ |
| #define DH6ERR_FAILURE 16 |
| #define DH6ERR_AUTHFAIL 17 |
| #define DH6ERR_POORLYFORMED 18 |
| #define DH6ERR_UNAVAIL 19 |
| #define DH6ERR_OPTUNAVAIL 20 |
| |
| /* Message type */ |
| #define DH6_SOLICIT 1 |
| #define DH6_ADVERTISE 2 |
| #define DH6_REQUEST 3 |
| #define DH6_CONFIRM 4 |
| #define DH6_RENEW 5 |
| #define DH6_REBIND 6 |
| #define DH6_REPLY 7 |
| #define DH6_RELEASE 8 |
| #define DH6_DECLINE 9 |
| #define DH6_RECONFIGURE 10 |
| #define DH6_INFORM_REQ 11 |
| #define DH6_RELAY_FORW 12 |
| #define DH6_RELAY_REPLY 13 |
| #define DH6_LEASEQUERY 14 |
| #define DH6_LQ_REPLY 15 |
| |
| static const struct tok dh6_msgtype_str[] = { |
| { DH6_SOLICIT, "solicit" }, |
| { DH6_ADVERTISE, "advertise" }, |
| { DH6_REQUEST, "request" }, |
| { DH6_CONFIRM, "confirm" }, |
| { DH6_RENEW, "renew" }, |
| { DH6_REBIND, "rebind" }, |
| { DH6_REPLY, "reply" }, |
| { DH6_RELEASE, "release" }, |
| { DH6_DECLINE, "decline" }, |
| { DH6_RECONFIGURE, "reconfigure" }, |
| { DH6_INFORM_REQ, "inf-req" }, |
| { DH6_RELAY_FORW, "relay-fwd" }, |
| { DH6_RELAY_REPLY, "relay-reply" }, |
| { DH6_LEASEQUERY, "leasequery" }, |
| { DH6_LQ_REPLY, "leasequery-reply" }, |
| { 0, NULL } |
| }; |
| |
| /* DHCP6 base packet format */ |
| struct dhcp6 { |
| union { |
| nd_uint8_t msgtype; |
| nd_uint32_t xid; |
| } dh6_msgtypexid; |
| /* options follow */ |
| }; |
| #define DH6_XIDMASK 0x00ffffff |
| |
| /* DHCPv6 relay messages */ |
| struct dhcp6_relay { |
| nd_uint8_t dh6relay_msgtype; |
| nd_uint8_t dh6relay_hcnt; |
| nd_ipv6 dh6relay_linkaddr; /* XXX: badly aligned */ |
| nd_ipv6 dh6relay_peeraddr; |
| /* options follow */ |
| }; |
| |
| /* options */ |
| #define DH6OPT_CLIENTID 1 |
| #define DH6OPT_SERVERID 2 |
| #define DH6OPT_IA_NA 3 |
| #define DH6OPT_IA_TA 4 |
| #define DH6OPT_IA_ADDR 5 |
| #define DH6OPT_ORO 6 |
| #define DH6OPT_PREFERENCE 7 |
| # define DH6OPT_PREF_MAX 255 |
| #define DH6OPT_ELAPSED_TIME 8 |
| #define DH6OPT_RELAY_MSG 9 |
| /*#define DH6OPT_SERVER_MSG 10 deprecated */ |
| #define DH6OPT_AUTH 11 |
| # define DH6OPT_AUTHPROTO_DELAYED 2 |
| # define DH6OPT_AUTHPROTO_RECONFIG 3 |
| # define DH6OPT_AUTHALG_HMACMD5 1 |
| # define DH6OPT_AUTHRDM_MONOCOUNTER 0 |
| # define DH6OPT_AUTHRECONFIG_KEY 1 |
| # define DH6OPT_AUTHRECONFIG_HMACMD5 2 |
| #define DH6OPT_UNICAST 12 |
| #define DH6OPT_STATUS_CODE 13 |
| # define DH6OPT_STCODE_SUCCESS 0 |
| # define DH6OPT_STCODE_UNSPECFAIL 1 |
| # define DH6OPT_STCODE_NOADDRAVAIL 2 |
| # define DH6OPT_STCODE_NOBINDING 3 |
| # define DH6OPT_STCODE_NOTONLINK 4 |
| # define DH6OPT_STCODE_USEMULTICAST 5 |
| # define DH6OPT_STCODE_NOPREFIXAVAIL 6 |
| # define DH6OPT_STCODE_UNKNOWNQUERYTYPE 7 |
| # define DH6OPT_STCODE_MALFORMEDQUERY 8 |
| # define DH6OPT_STCODE_NOTCONFIGURED 9 |
| # define DH6OPT_STCODE_NOTALLOWED 10 |
| #define DH6OPT_RAPID_COMMIT 14 |
| #define DH6OPT_USER_CLASS 15 |
| #define DH6OPT_VENDOR_CLASS 16 |
| #define DH6OPT_VENDOR_OPTS 17 |
| #define DH6OPT_INTERFACE_ID 18 |
| #define DH6OPT_RECONF_MSG 19 |
| #define DH6OPT_RECONF_ACCEPT 20 |
| #define DH6OPT_SIP_SERVER_D 21 |
| #define DH6OPT_SIP_SERVER_A 22 |
| #define DH6OPT_DNS_SERVERS 23 |
| #define DH6OPT_DOMAIN_LIST 24 |
| #define DH6OPT_IA_PD 25 |
| #define DH6OPT_IA_PD_PREFIX 26 |
| #define DH6OPT_NIS_SERVERS 27 |
| #define DH6OPT_NISP_SERVERS 28 |
| #define DH6OPT_NIS_NAME 29 |
| #define DH6OPT_NISP_NAME 30 |
| #define DH6OPT_SNTP_SERVERS 31 |
| #define DH6OPT_LIFETIME 32 |
| #define DH6OPT_BCMCS_SERVER_D 33 |
| #define DH6OPT_BCMCS_SERVER_A 34 |
| #define DH6OPT_GEOCONF_CIVIC 36 |
| #define DH6OPT_REMOTE_ID 37 |
| #define DH6OPT_SUBSCRIBER_ID 38 |
| #define DH6OPT_CLIENT_FQDN 39 |
| #define DH6OPT_PANA_AGENT 40 |
| #define DH6OPT_NEW_POSIX_TIMEZONE 41 |
| #define DH6OPT_NEW_TZDB_TIMEZONE 42 |
| #define DH6OPT_ERO 43 |
| #define DH6OPT_LQ_QUERY 44 |
| #define DH6OPT_CLIENT_DATA 45 |
| #define DH6OPT_CLT_TIME 46 |
| #define DH6OPT_LQ_RELAY_DATA 47 |
| #define DH6OPT_LQ_CLIENT_LINK 48 |
| #define DH6OPT_NTP_SERVER 56 |
| # define DH6OPT_NTP_SUBOPTION_SRV_ADDR 1 |
| # define DH6OPT_NTP_SUBOPTION_MC_ADDR 2 |
| # define DH6OPT_NTP_SUBOPTION_SRV_FQDN 3 |
| #define DH6OPT_AFTR_NAME 64 |
| #define DH6OPT_MUDURL 112 |
| |
| static const struct tok dh6opt_str[] = { |
| { DH6OPT_CLIENTID, "client-ID" }, |
| { DH6OPT_SERVERID, "server-ID" }, |
| { DH6OPT_IA_NA, "IA_NA" }, |
| { DH6OPT_IA_TA, "IA_TA" }, |
| { DH6OPT_IA_ADDR, "IA_ADDR" }, |
| { DH6OPT_ORO, "option-request" }, |
| { DH6OPT_PREFERENCE, "preference" }, |
| { DH6OPT_ELAPSED_TIME, "elapsed-time" }, |
| { DH6OPT_RELAY_MSG, "relay-message" }, |
| { DH6OPT_AUTH, "authentication" }, |
| { DH6OPT_UNICAST, "server-unicast" }, |
| { DH6OPT_STATUS_CODE, "status-code" }, |
| { DH6OPT_RAPID_COMMIT, "rapid-commit" }, |
| { DH6OPT_USER_CLASS, "user-class" }, |
| { DH6OPT_VENDOR_CLASS, "vendor-class" }, |
| { DH6OPT_VENDOR_OPTS, "vendor-specific-info" }, |
| { DH6OPT_INTERFACE_ID, "interface-ID" }, |
| { DH6OPT_RECONF_MSG, "reconfigure-message" }, |
| { DH6OPT_RECONF_ACCEPT, "reconfigure-accept" }, |
| { DH6OPT_SIP_SERVER_D, "SIP-servers-domain" }, |
| { DH6OPT_SIP_SERVER_A, "SIP-servers-address" }, |
| { DH6OPT_DNS_SERVERS, "DNS-server" }, |
| { DH6OPT_DOMAIN_LIST, "DNS-search-list" }, |
| { DH6OPT_IA_PD, "IA_PD" }, |
| { DH6OPT_IA_PD_PREFIX, "IA_PD-prefix" }, |
| { DH6OPT_SNTP_SERVERS, "SNTP-servers" }, |
| { DH6OPT_LIFETIME, "lifetime" }, |
| { DH6OPT_NIS_SERVERS, "NIS-server" }, |
| { DH6OPT_NISP_SERVERS, "NIS+-server" }, |
| { DH6OPT_NIS_NAME, "NIS-domain-name" }, |
| { DH6OPT_NISP_NAME, "NIS+-domain-name" }, |
| { DH6OPT_BCMCS_SERVER_D, "BCMCS-domain-name" }, |
| { DH6OPT_BCMCS_SERVER_A, "BCMCS-server" }, |
| { DH6OPT_GEOCONF_CIVIC, "Geoconf-Civic" }, |
| { DH6OPT_REMOTE_ID, "Remote-ID" }, |
| { DH6OPT_SUBSCRIBER_ID, "Subscriber-ID" }, |
| { DH6OPT_CLIENT_FQDN, "Client-FQDN" }, |
| { DH6OPT_PANA_AGENT, "PANA-agent" }, |
| { DH6OPT_NEW_POSIX_TIMEZONE, "POSIX-timezone" }, |
| { DH6OPT_NEW_TZDB_TIMEZONE, "POSIX-tz-database" }, |
| { DH6OPT_ERO, "Echo-request-option" }, |
| { DH6OPT_LQ_QUERY, "Lease-query" }, |
| { DH6OPT_CLIENT_DATA, "LQ-client-data" }, |
| { DH6OPT_CLT_TIME, "Clt-time" }, |
| { DH6OPT_LQ_RELAY_DATA, "LQ-relay-data" }, |
| { DH6OPT_LQ_CLIENT_LINK, "LQ-client-link" }, |
| { DH6OPT_NTP_SERVER, "NTP-server" }, |
| { DH6OPT_AFTR_NAME, "AFTR-Name" }, |
| { DH6OPT_MUDURL, "MUD-URL" }, |
| { 0, NULL } |
| }; |
| |
| static const struct tok dh6opt_stcode_str[] = { |
| { DH6OPT_STCODE_SUCCESS, "Success" }, /* RFC3315 */ |
| { DH6OPT_STCODE_UNSPECFAIL, "UnspecFail" }, /* RFC3315 */ |
| { DH6OPT_STCODE_NOADDRAVAIL, "NoAddrsAvail" }, /* RFC3315 */ |
| { DH6OPT_STCODE_NOBINDING, "NoBinding" }, /* RFC3315 */ |
| { DH6OPT_STCODE_NOTONLINK, "NotOnLink" }, /* RFC3315 */ |
| { DH6OPT_STCODE_USEMULTICAST, "UseMulticast" }, /* RFC3315 */ |
| { DH6OPT_STCODE_NOPREFIXAVAIL, "NoPrefixAvail" }, /* RFC3633 */ |
| { DH6OPT_STCODE_UNKNOWNQUERYTYPE, "UnknownQueryType" }, /* RFC5007 */ |
| { DH6OPT_STCODE_MALFORMEDQUERY, "MalformedQuery" }, /* RFC5007 */ |
| { DH6OPT_STCODE_NOTCONFIGURED, "NotConfigured" }, /* RFC5007 */ |
| { DH6OPT_STCODE_NOTALLOWED, "NotAllowed" }, /* RFC5007 */ |
| { 0, NULL } |
| }; |
| |
| struct dhcp6opt { |
| nd_uint16_t dh6opt_type; |
| nd_uint16_t dh6opt_len; |
| /* type-dependent data follows */ |
| }; |
| |
| static const char * |
| dhcp6stcode(const uint16_t code) |
| { |
| return code > 255 ? "INVALID code" : tok2str(dh6opt_stcode_str, "code%u", code); |
| } |
| |
| static void |
| dhcp6opt_print(netdissect_options *ndo, |
| const u_char *cp, const u_char *ep) |
| { |
| const struct dhcp6opt *dh6o; |
| const u_char *tp; |
| u_int i; |
| uint16_t opttype; |
| uint16_t optlen; |
| uint8_t auth_proto; |
| uint8_t auth_alg; |
| uint8_t auth_rdm; |
| u_int authinfolen, authrealmlen; |
| u_int remain_len; /* Length of remaining options */ |
| u_int label_len; /* Label length */ |
| uint16_t subopt_code; |
| uint16_t subopt_len; |
| uint8_t dh6_reconf_type; |
| uint8_t dh6_lq_query_type; |
| |
| if (cp == ep) |
| return; |
| while (cp < ep) { |
| if (ep < cp + sizeof(*dh6o)) |
| goto trunc; |
| dh6o = (const struct dhcp6opt *)cp; |
| ND_TCHECK_SIZE(dh6o); |
| optlen = GET_BE_U_2(dh6o->dh6opt_len); |
| if (ep < cp + sizeof(*dh6o) + optlen) |
| goto trunc; |
| opttype = GET_BE_U_2(dh6o->dh6opt_type); |
| ND_PRINT(" (%s", tok2str(dh6opt_str, "opt_%u", opttype)); |
| ND_TCHECK_LEN(cp + sizeof(*dh6o), optlen); |
| switch (opttype) { |
| case DH6OPT_CLIENTID: |
| case DH6OPT_SERVERID: |
| if (optlen < 2) { |
| /*(*/ |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| switch (GET_BE_U_2(tp)) { |
| case 1: |
| if (optlen >= 2 + 6) { |
| ND_PRINT(" hwaddr/time type %u time %u ", |
| GET_BE_U_2(tp + 2), |
| GET_BE_U_4(tp + 4)); |
| for (i = 8; i < optlen; i++) |
| ND_PRINT("%02x", |
| GET_U_1(tp + i)); |
| /*(*/ |
| ND_PRINT(")"); |
| } else { |
| /*(*/ |
| ND_PRINT(" ?)"); |
| } |
| break; |
| case 2: |
| if (optlen >= 2 + 8) { |
| ND_PRINT(" vid "); |
| for (i = 2; i < 2 + 8; i++) |
| ND_PRINT("%02x", |
| GET_U_1(tp + i)); |
| /*(*/ |
| ND_PRINT(")"); |
| } else { |
| /*(*/ |
| ND_PRINT(" ?)"); |
| } |
| break; |
| case 3: |
| if (optlen >= 2 + 2) { |
| ND_PRINT(" hwaddr type %u ", |
| GET_BE_U_2(tp + 2)); |
| for (i = 4; i < optlen; i++) |
| ND_PRINT("%02x", |
| GET_U_1(tp + i)); |
| /*(*/ |
| ND_PRINT(")"); |
| } else { |
| /*(*/ |
| ND_PRINT(" ?)"); |
| } |
| break; |
| default: |
| ND_PRINT(" type %u)", GET_BE_U_2(tp)); |
| break; |
| } |
| break; |
| case DH6OPT_IA_ADDR: |
| if (optlen < 24) { |
| /*(*/ |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" %s", GET_IP6ADDR_STRING(tp)); |
| ND_PRINT(" pltime:%u vltime:%u", |
| GET_BE_U_4(tp + 16), |
| GET_BE_U_4(tp + 20)); |
| if (optlen > 24) { |
| /* there are sub-options */ |
| dhcp6opt_print(ndo, tp + 24, tp + optlen); |
| } |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_ORO: |
| case DH6OPT_ERO: |
| if (optlen % 2) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| for (i = 0; i < optlen; i += 2) { |
| ND_PRINT(" %s", |
| tok2str(dh6opt_str, "opt_%u", GET_BE_U_2(tp + i))); |
| } |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_PREFERENCE: |
| if (optlen != 1) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" %u)", GET_U_1(tp)); |
| break; |
| case DH6OPT_ELAPSED_TIME: |
| if (optlen != 2) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" %u)", GET_BE_U_2(tp)); |
| break; |
| case DH6OPT_RELAY_MSG: |
| { |
| const u_char *snapend_save; |
| |
| ND_PRINT(" ("); |
| tp = (const u_char *)(dh6o + 1); |
| /* |
| * Update the snapend to the end of the option before |
| * calling recursively dhcp6_print() for the nested |
| * packet. Other options may be present after the |
| * nested DHCPv6 packet. This prevents that, in |
| * dhcp6_print(), for the nested DHCPv6 packet, the |
| * remaining length < remaining caplen. |
| */ |
| snapend_save = ndo->ndo_snapend; |
| ndo->ndo_snapend = ND_MIN(tp + optlen, ndo->ndo_snapend); |
| dhcp6_print(ndo, tp, optlen); |
| ndo->ndo_snapend = snapend_save; |
| ND_PRINT(")"); |
| break; |
| } |
| case DH6OPT_AUTH: |
| if (optlen < 11) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| auth_proto = GET_U_1(tp); |
| switch (auth_proto) { |
| case DH6OPT_AUTHPROTO_DELAYED: |
| ND_PRINT(" proto: delayed"); |
| break; |
| case DH6OPT_AUTHPROTO_RECONFIG: |
| ND_PRINT(" proto: reconfigure"); |
| break; |
| default: |
| ND_PRINT(" proto: %u", auth_proto); |
| break; |
| } |
| tp++; |
| auth_alg = GET_U_1(tp); |
| switch (auth_alg) { |
| case DH6OPT_AUTHALG_HMACMD5: |
| /* XXX: may depend on the protocol */ |
| ND_PRINT(", alg: HMAC-MD5"); |
| break; |
| default: |
| ND_PRINT(", alg: %u", auth_alg); |
| break; |
| } |
| tp++; |
| auth_rdm = GET_U_1(tp); |
| switch (auth_rdm) { |
| case DH6OPT_AUTHRDM_MONOCOUNTER: |
| ND_PRINT(", RDM: mono"); |
| break; |
| default: |
| ND_PRINT(", RDM: %u", auth_rdm); |
| break; |
| } |
| tp++; |
| ND_PRINT(", RD:"); |
| for (i = 0; i < 4; i++, tp += 2) |
| ND_PRINT(" %04x", GET_BE_U_2(tp)); |
| |
| /* protocol dependent part */ |
| authinfolen = optlen - 11; |
| switch (auth_proto) { |
| case DH6OPT_AUTHPROTO_DELAYED: |
| if (authinfolen == 0) |
| break; |
| if (authinfolen < 20) { |
| ND_PRINT(" ??"); |
| break; |
| } |
| authrealmlen = authinfolen - 20; |
| if (authrealmlen > 0) { |
| ND_PRINT(", realm: "); |
| } |
| for (i = 0; i < authrealmlen; i++, tp++) |
| ND_PRINT("%02x", GET_U_1(tp)); |
| ND_PRINT(", key ID: %08x", GET_BE_U_4(tp)); |
| tp += 4; |
| ND_PRINT(", HMAC-MD5:"); |
| for (i = 0; i < 4; i++, tp+= 4) |
| ND_PRINT(" %08x", GET_BE_U_4(tp)); |
| break; |
| case DH6OPT_AUTHPROTO_RECONFIG: |
| if (authinfolen != 17) { |
| ND_PRINT(" ??"); |
| break; |
| } |
| switch (GET_U_1(tp)) { |
| case DH6OPT_AUTHRECONFIG_KEY: |
| ND_PRINT(" reconfig-key"); |
| break; |
| case DH6OPT_AUTHRECONFIG_HMACMD5: |
| ND_PRINT(" type: HMAC-MD5"); |
| break; |
| default: |
| ND_PRINT(" type: ??"); |
| break; |
| } |
| tp++; |
| ND_PRINT(" value:"); |
| for (i = 0; i < 4; i++, tp+= 4) |
| ND_PRINT(" %08x", GET_BE_U_4(tp)); |
| break; |
| default: |
| ND_PRINT(" ??"); |
| break; |
| } |
| |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_RAPID_COMMIT: /* nothing todo */ |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_INTERFACE_ID: |
| case DH6OPT_SUBSCRIBER_ID: |
| /* |
| * Since we cannot predict the encoding, print hex dump |
| * at most 10 characters. |
| */ |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" "); |
| for (i = 0; i < optlen && i < 10; i++) |
| ND_PRINT("%02x", GET_U_1(tp + i)); |
| ND_PRINT("...)"); |
| break; |
| case DH6OPT_RECONF_MSG: |
| if (optlen != 1) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| dh6_reconf_type = GET_U_1(tp); |
| switch (dh6_reconf_type) { |
| case DH6_RENEW: |
| ND_PRINT(" for renew)"); |
| break; |
| case DH6_INFORM_REQ: |
| ND_PRINT(" for inf-req)"); |
| break; |
| default: |
| ND_PRINT(" for ?\?\?(%02x))", dh6_reconf_type); |
| break; |
| } |
| break; |
| case DH6OPT_RECONF_ACCEPT: /* nothing todo */ |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_SIP_SERVER_A: |
| case DH6OPT_DNS_SERVERS: |
| case DH6OPT_SNTP_SERVERS: |
| case DH6OPT_NIS_SERVERS: |
| case DH6OPT_NISP_SERVERS: |
| case DH6OPT_BCMCS_SERVER_A: |
| case DH6OPT_PANA_AGENT: |
| case DH6OPT_LQ_CLIENT_LINK: |
| if (optlen % 16) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| for (i = 0; i < optlen; i += 16) |
| ND_PRINT(" %s", GET_IP6ADDR_STRING(tp + i)); |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_SIP_SERVER_D: |
| case DH6OPT_DOMAIN_LIST: |
| tp = (const u_char *)(dh6o + 1); |
| while (tp < cp + sizeof(*dh6o) + optlen) { |
| ND_PRINT(" "); |
| if ((tp = fqdn_print(ndo, tp, cp + sizeof(*dh6o) + optlen)) == NULL) |
| goto trunc; |
| } |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_STATUS_CODE: |
| if (optlen < 2) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" %s)", dhcp6stcode(GET_BE_U_2(tp))); |
| break; |
| case DH6OPT_IA_NA: |
| case DH6OPT_IA_PD: |
| if (optlen < 12) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" IAID:%u T1:%u T2:%u", |
| GET_BE_U_4(tp), |
| GET_BE_U_4(tp + 4), |
| GET_BE_U_4(tp + 8)); |
| if (optlen > 12) { |
| /* there are sub-options */ |
| dhcp6opt_print(ndo, tp + 12, tp + optlen); |
| } |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_IA_TA: |
| if (optlen < 4) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" IAID:%u", GET_BE_U_4(tp)); |
| if (optlen > 4) { |
| /* there are sub-options */ |
| dhcp6opt_print(ndo, tp + 4, tp + optlen); |
| } |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_IA_PD_PREFIX: |
| if (optlen < 25) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" %s/%u", GET_IP6ADDR_STRING(tp + 9), |
| GET_U_1(tp + 8)); |
| ND_PRINT(" pltime:%u vltime:%u", |
| GET_BE_U_4(tp), |
| GET_BE_U_4(tp + 4)); |
| if (optlen > 25) { |
| /* there are sub-options */ |
| dhcp6opt_print(ndo, tp + 25, tp + optlen); |
| } |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_LIFETIME: |
| case DH6OPT_CLT_TIME: |
| if (optlen != 4) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" %u)", GET_BE_U_4(tp)); |
| break; |
| case DH6OPT_REMOTE_ID: |
| if (optlen < 4) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" %u ", GET_BE_U_4(tp)); |
| /* |
| * Print hex dump first 10 characters. |
| */ |
| for (i = 4; i < optlen && i < 14; i++) |
| ND_PRINT("%02x", GET_U_1(tp + i)); |
| ND_PRINT("...)"); |
| break; |
| case DH6OPT_LQ_QUERY: |
| if (optlen < 17) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| dh6_lq_query_type = GET_U_1(tp); |
| switch (dh6_lq_query_type) { |
| case 1: |
| ND_PRINT(" by-address"); |
| break; |
| case 2: |
| ND_PRINT(" by-clientID"); |
| break; |
| default: |
| ND_PRINT(" type_%u", dh6_lq_query_type); |
| break; |
| } |
| ND_PRINT(" %s", GET_IP6ADDR_STRING(tp + 1)); |
| if (optlen > 17) { |
| /* there are query-options */ |
| dhcp6opt_print(ndo, tp + 17, tp + optlen); |
| } |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_CLIENT_DATA: |
| tp = (const u_char *)(dh6o + 1); |
| if (optlen > 0) { |
| /* there are encapsulated options */ |
| dhcp6opt_print(ndo, tp, tp + optlen); |
| } |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_LQ_RELAY_DATA: |
| if (optlen < 16) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" %s ", GET_IP6ADDR_STRING(tp)); |
| /* |
| * Print hex dump first 10 characters. |
| */ |
| for (i = 16; i < optlen && i < 26; i++) |
| ND_PRINT("%02x", GET_U_1(tp + i)); |
| ND_PRINT("...)"); |
| break; |
| case DH6OPT_NTP_SERVER: |
| if (optlen < 4) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| while (tp < cp + sizeof(*dh6o) + optlen - 4) { |
| subopt_code = GET_BE_U_2(tp); |
| tp += 2; |
| subopt_len = GET_BE_U_2(tp); |
| tp += 2; |
| if (tp + subopt_len > cp + sizeof(*dh6o) + optlen) |
| goto trunc; |
| ND_PRINT(" subopt:%u", subopt_code); |
| switch (subopt_code) { |
| case DH6OPT_NTP_SUBOPTION_SRV_ADDR: |
| case DH6OPT_NTP_SUBOPTION_MC_ADDR: |
| if (subopt_len != 16) { |
| ND_PRINT(" ?"); |
| break; |
| } |
| ND_PRINT(" %s", GET_IP6ADDR_STRING(tp)); |
| break; |
| case DH6OPT_NTP_SUBOPTION_SRV_FQDN: |
| ND_PRINT(" "); |
| if (fqdn_print(ndo, tp, tp + subopt_len) == NULL) |
| goto trunc; |
| break; |
| default: |
| ND_PRINT(" ?"); |
| break; |
| } |
| tp += subopt_len; |
| } |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_AFTR_NAME: |
| if (optlen < 3) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| remain_len = optlen; |
| ND_PRINT(" "); |
| /* Encoding is described in section 3.1 of RFC 1035 */ |
| while (remain_len && GET_U_1(tp)) { |
| label_len = GET_U_1(tp); |
| tp++; |
| if (label_len < remain_len - 1) { |
| nd_printjnp(ndo, tp, label_len); |
| tp += label_len; |
| remain_len -= (label_len + 1); |
| if(GET_U_1(tp)) ND_PRINT("."); |
| } else { |
| ND_PRINT(" ?"); |
| break; |
| } |
| } |
| ND_PRINT(")"); |
| break; |
| case DH6OPT_NEW_POSIX_TIMEZONE: /* all three of these options */ |
| case DH6OPT_NEW_TZDB_TIMEZONE: /* are encoded similarly */ |
| case DH6OPT_MUDURL: /* although GMT might not work */ |
| if (optlen < 5) { |
| ND_PRINT(" ?)"); |
| break; |
| } |
| tp = (const u_char *)(dh6o + 1); |
| ND_PRINT(" "); |
| nd_printjnp(ndo, tp, optlen); |
| ND_PRINT(")"); |
| break; |
| |
| default: |
| ND_PRINT(")"); |
| break; |
| } |
| |
| cp += sizeof(*dh6o) + optlen; |
| } |
| return; |
| |
| trunc: |
| nd_print_trunc(ndo); |
| } |
| |
| /* |
| * Print dhcp6 packets |
| */ |
| void |
| dhcp6_print(netdissect_options *ndo, |
| const u_char *cp, u_int length) |
| { |
| const struct dhcp6 *dh6; |
| const struct dhcp6_relay *dh6relay; |
| uint8_t msgtype; |
| const u_char *ep; |
| const u_char *extp; |
| const char *name; |
| |
| ndo->ndo_protocol = "dhcp6"; |
| ND_PRINT("dhcp6"); |
| |
| ep = ndo->ndo_snapend; |
| if (cp + length < ep) |
| ep = cp + length; |
| |
| dh6 = (const struct dhcp6 *)cp; |
| dh6relay = (const struct dhcp6_relay *)cp; |
| ND_TCHECK_4(dh6->dh6_msgtypexid.xid); |
| msgtype = GET_U_1(dh6->dh6_msgtypexid.msgtype); |
| name = tok2str(dh6_msgtype_str, "msgtype-%u", msgtype); |
| |
| if (!ndo->ndo_vflag) { |
| ND_PRINT(" %s", name); |
| return; |
| } |
| |
| /* XXX relay agent messages have to be handled differently */ |
| |
| ND_PRINT(" %s (", name); /*)*/ |
| if (msgtype != DH6_RELAY_FORW && msgtype != DH6_RELAY_REPLY) { |
| ND_PRINT("xid=%x", |
| GET_BE_U_4(dh6->dh6_msgtypexid.xid) & DH6_XIDMASK); |
| extp = (const u_char *)(dh6 + 1); |
| dhcp6opt_print(ndo, extp, ep); |
| } else { /* relay messages */ |
| ND_PRINT("linkaddr=%s", GET_IP6ADDR_STRING(dh6relay->dh6relay_linkaddr)); |
| |
| ND_PRINT(" peeraddr=%s", GET_IP6ADDR_STRING(dh6relay->dh6relay_peeraddr)); |
| |
| dhcp6opt_print(ndo, (const u_char *)(dh6relay + 1), ep); |
| } |
| /*(*/ |
| ND_PRINT(")"); |
| return; |
| |
| trunc: |
| nd_print_trunc(ndo); |
| } |