/* * 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 #endif #include "netdissect-stdinc.h" #include #include #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: ND_PRINT(" ("); tp = (const u_char *)(dh6o + 1); dhcp6_print(ndo, tp, optlen); 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) { (void)nd_printn(ndo, tp, label_len, NULL); 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("="); (void)nd_printn(ndo, tp, (u_int)optlen, NULL); 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_TCHECK_16(dh6relay->dh6relay_peeraddr); 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); }