X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/d35a11b05cf94c46272aced87bd2d2c6c4663f6f..d7b497cac78b6e22a66a6bae9bdec60a8044f67a:/print-dhcp6.c diff --git a/print-dhcp6.c b/print-dhcp6.c index 6c732577..e6986da0 100644 --- a/print-dhcp6.c +++ b/print-dhcp6.c @@ -1,7 +1,7 @@ /* * 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: @@ -13,7 +13,7 @@ * 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 @@ -27,327 +27,816 @@ * SUCH DAMAGE. */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.13 2001-01-28 09:49:49 itojun Exp $"; -#endif +/* \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 -#include -#include +#include -struct mbuf; -struct rtentry; - -#include - -#include #include #include -#include -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" -#include "dhcp6.h" -#include "dhcp6opt.h" - -#if 0 -static void dhcp6opttab_init(void); -static struct dhcp6_opt *dhcp6opttab_byname(char *); -#endif -static struct dhcp6_opt *dhcp6opttab_bycode(u_int); - -static char tstr[] = " [|dhcp6]"; - -static struct dhcp6_opt dh6opttab[] = { - /* IP Address Extension */ - { 1, OL6_N, "IP Address", OT6_NONE, }, - - /* General Extension */ - { 8193, OL6_N, "IEEE 1003.1 POSIX Timezone", OT6_STR, }, - { 8194, OL6_16N, "Domain Name Server", OT6_V6, }, - { 8195, OL6_N, "Domain Name", OT6_STR, }, - - { 8196, OL6_N, "SLP Agent", OT6_NONE, }, - { 8197, OL6_N, "SLP Scope" , OT6_NONE, }, - { 8198, OL6_16N, "Network Time Protocol Servers", OT6_V6, }, - { 8199, OL6_N, "NIS Domain", OT6_STR, }, - { 8200, OL6_16N, "NIS Servers", OT6_V6, }, - { 8201, OL6_N, "NIS+ Domain", OT6_STR, }, - { 8202, OL6_16N, "NIS+ Servers", OT6_V6, }, - - /* TCP Parameters */ - { 8203, 4, "TCP Keepalive Interval", OT6_NUM, }, - - /* DHCPv6 Extensions */ - { 8204, 4, "Maximum DHCPv6 Message Size", OT6_NUM, }, - { 8205, OL6_N, "DHCP Retransmission and Configuration Parameter", - OT6_NONE, }, - { 8206, OL6_N, "Extension Request", OT6_NONE, }, - { 8207, OL6_N, "Subnet Prefix", OT6_NONE, }, - { 8208, OL6_N, "Platform Specific Information", OT6_NONE, }, - { 8209, OL6_N, "Platform Class Identifier", OT6_STR, }, - { 8210, OL6_N, "Class Identifier", OT6_STR, }, - { 8211, 16, "Reconfigure Multicast Address", OT6_V6, }, - { 8212, 16, "Renumber DHCPv6 Server Address", - OT6_V6, }, - { 8213, OL6_N, "Client-Server Authentication", OT6_NONE, }, - { 8214, 4, "Client Key Selection", OT6_NUM, }, - - /* End Extension */ - { 65536, OL6_Z, "End", OT6_NONE, }, - - { 0 }, +#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 } }; -#if 0 -static struct dhcp6_opt *dh6o_pad; -static struct dhcp6_opt *dh6o_end; +/* DHCP6 base packet format */ +struct dhcp6 { + union { + nd_uint8_t m; + nd_uint32_t x; + } dh6_msgtypexid; + /* options follow */ +}; +#define dh6_msgtype dh6_msgtypexid.m +#define dh6_xid dh6_msgtypexid.x +#define DH6_XIDMASK 0x00ffffff + +/* DHCPv6 relay messages */ +struct dhcp6_relay { + nd_uint8_t dh6relay_msgtype; + nd_uint8_t dh6relay_hcnt; + nd_uint8_t dh6relay_linkaddr[16]; /* XXX: badly aligned */ + nd_uint8_t dh6relay_peeraddr[16]; + /* options follow */ +}; -static void -dhcp6opttab_init() -{ - dh6o_pad = dhcp6opttab_bycode(0); - dh6o_end = dhcp6opttab_bycode(65536); -} -#endif +/* 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 } +}; -#if 0 -static struct dhcp6_opt * -dhcp6opttab_byname(name) - char *name; -{ - struct dhcp6_opt *p; +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 } +}; - for (p = dh6opttab; p->code; p++) - if (strcmp(name, p->name) == 0) - return p; - return NULL; -} -#endif +struct dhcp6opt { + nd_uint16_t dh6opt_type; + nd_uint16_t dh6opt_len; + /* type-dependent data follows */ +}; -static struct dhcp6_opt * -dhcp6opttab_bycode(code) - u_int code; +static const char * +dhcp6stcode(const uint16_t code) { - struct dhcp6_opt *p; - - for (p = dh6opttab; p->code; p++) - if (p->code == code) - return p; - return NULL; + return code > 255 ? "INVALID code" : tok2str(dh6opt_stcode_str, "code%u", code); } static void -dhcp6ext_print(u_char *cp, u_char *ep) +dhcp6opt_print(netdissect_options *ndo, + const u_char *cp, const u_char *ep) { - u_int16_t code, len; - struct dhcp6_opt *p; - char buf[BUFSIZ]; - int i; + const struct dhcp6opt *dh6o; + const u_char *tp; + size_t i; + uint16_t opttype; + size_t optlen; + uint8_t auth_proto; + uint8_t auth_alg; + uint8_t auth_rdm; + u_int authinfolen, authrealmlen; + int remain_len; /* Length of remaining options */ + 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(u_int16_t)) + if (ep < cp + sizeof(*dh6o)) + goto trunc; + dh6o = (const struct dhcp6opt *)cp; + ND_TCHECK(*dh6o); + optlen = EXTRACT_BE_U_2(&dh6o->dh6opt_len); + if (ep < cp + sizeof(*dh6o) + optlen) + goto trunc; + opttype = EXTRACT_BE_U_2(&dh6o->dh6opt_type); + ND_PRINT((ndo, " (%s", tok2str(dh6opt_str, "opt_%u", opttype))); + ND_TCHECK2(*(cp + sizeof(*dh6o)), optlen); + switch (opttype) { + case DH6OPT_CLIENTID: + case DH6OPT_SERVERID: + if (optlen < 2) { + /*(*/ + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + switch (EXTRACT_BE_U_2(tp)) { + case 1: + if (optlen >= 2 + 6) { + ND_PRINT((ndo, " hwaddr/time type %u time %u ", + EXTRACT_BE_U_2(tp + 2), + EXTRACT_BE_U_4(tp + 4))); + for (i = 8; i < optlen; i++) + ND_PRINT((ndo, "%02x", EXTRACT_U_1(tp + i))); + /*(*/ + ND_PRINT((ndo, ")")); + } else { + /*(*/ + ND_PRINT((ndo, " ?)")); + } + break; + case 2: + if (optlen >= 2 + 8) { + ND_PRINT((ndo, " vid ")); + for (i = 2; i < 2 + 8; i++) + ND_PRINT((ndo, "%02x", EXTRACT_U_1(tp + i))); + /*(*/ + ND_PRINT((ndo, ")")); + } else { + /*(*/ + ND_PRINT((ndo, " ?)")); + } + break; + case 3: + if (optlen >= 2 + 2) { + ND_PRINT((ndo, " hwaddr type %u ", + EXTRACT_BE_U_2(tp + 2))); + for (i = 4; i < optlen; i++) + ND_PRINT((ndo, "%02x", EXTRACT_U_1(tp + i))); + /*(*/ + ND_PRINT((ndo, ")")); + } else { + /*(*/ + ND_PRINT((ndo, " ?)")); + } + break; + default: + ND_PRINT((ndo, " type %d)", EXTRACT_BE_U_2(tp))); + break; + } break; - code = ntohs(*(u_int16_t *)&cp[0]); - if (ep - cp < sizeof(u_int16_t) * 2) + case DH6OPT_IA_ADDR: + if (optlen < 24) { + /*(*/ + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %s", ip6addr_string(ndo, tp))); + ND_PRINT((ndo, " pltime:%u vltime:%u", + EXTRACT_BE_U_4(tp + 16), + EXTRACT_BE_U_4(tp + 20))); + if (optlen > 24) { + /* there are sub-options */ + dhcp6opt_print(ndo, tp + 24, tp + optlen); + } + ND_PRINT((ndo, ")")); break; - if (code != 65535) - len = ntohs(*(u_int16_t *)&cp[2]); - else - len = 0; - if (ep - cp < len + 4) + case DH6OPT_ORO: + case DH6OPT_ERO: + if (optlen % 2) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + for (i = 0; i < optlen; i += 2) { + ND_PRINT((ndo, " %s", + tok2str(dh6opt_str, "opt_%u", EXTRACT_BE_U_2(tp + i)))); + } + ND_PRINT((ndo, ")")); break; - p = dhcp6opttab_bycode(code); - if (p == NULL) { - printf("(unknown, len=%d)", len); - cp += len + 4; - continue; - } + case DH6OPT_PREFERENCE: + if (optlen != 1) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %d)", EXTRACT_U_1(tp))); + break; + case DH6OPT_ELAPSED_TIME: + if (optlen != 2) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %d)", EXTRACT_BE_U_2(tp))); + break; + case DH6OPT_RELAY_MSG: + ND_PRINT((ndo, " (")); + tp = (const u_char *)(dh6o + 1); + dhcp6_print(ndo, tp, optlen); + ND_PRINT((ndo, ")")); + break; + case DH6OPT_AUTH: + if (optlen < 11) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + auth_proto = EXTRACT_U_1(tp); + switch (auth_proto) { + case DH6OPT_AUTHPROTO_DELAYED: + ND_PRINT((ndo, " proto: delayed")); + break; + case DH6OPT_AUTHPROTO_RECONFIG: + ND_PRINT((ndo, " proto: reconfigure")); + break; + default: + ND_PRINT((ndo, " proto: %d", auth_proto)); + break; + } + tp++; + auth_alg = EXTRACT_U_1(tp); + switch (auth_alg) { + case DH6OPT_AUTHALG_HMACMD5: + /* XXX: may depend on the protocol */ + ND_PRINT((ndo, ", alg: HMAC-MD5")); + break; + default: + ND_PRINT((ndo, ", alg: %d", auth_alg)); + break; + } + tp++; + auth_rdm = EXTRACT_U_1(tp); + switch (auth_rdm) { + case DH6OPT_AUTHRDM_MONOCOUNTER: + ND_PRINT((ndo, ", RDM: mono")); + break; + default: + ND_PRINT((ndo, ", RDM: %d", auth_rdm)); + break; + } + tp++; + ND_PRINT((ndo, ", RD:")); + for (i = 0; i < 4; i++, tp += 2) + ND_PRINT((ndo, " %04x", EXTRACT_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((ndo, " ??")); + break; + } + authrealmlen = authinfolen - 20; + if (authrealmlen > 0) { + ND_PRINT((ndo, ", realm: ")); + } + for (i = 0; i < authrealmlen; i++, tp++) + ND_PRINT((ndo, "%02x", EXTRACT_U_1(tp))); + ND_PRINT((ndo, ", key ID: %08x", EXTRACT_BE_U_4(tp))); + tp += 4; + ND_PRINT((ndo, ", HMAC-MD5:")); + for (i = 0; i < 4; i++, tp+= 4) + ND_PRINT((ndo, " %08x", EXTRACT_BE_U_4(tp))); + break; + case DH6OPT_AUTHPROTO_RECONFIG: + if (authinfolen != 17) { + ND_PRINT((ndo, " ??")); + break; + } + switch (EXTRACT_U_1(tp)) { + case DH6OPT_AUTHRECONFIG_KEY: + ND_PRINT((ndo, " reconfig-key")); + break; + case DH6OPT_AUTHRECONFIG_HMACMD5: + ND_PRINT((ndo, " type: HMAC-MD5")); + break; + default: + ND_PRINT((ndo, " type: ??")); + break; + } + tp++; + ND_PRINT((ndo, " value:")); + for (i = 0; i < 4; i++, tp+= 4) + ND_PRINT((ndo, " %08x", EXTRACT_BE_U_4(tp))); + break; + default: + ND_PRINT((ndo, " ??")); + break; + } - /* sanity check on length */ - switch (p->len) { - case OL6_N: + ND_PRINT((ndo, ")")); break; - case OL6_16N: - if (len % 16 != 0) - goto trunc; + case DH6OPT_RAPID_COMMIT: /* nothing todo */ + ND_PRINT((ndo, ")")); break; - case OL6_Z: - if (len != 0) - goto trunc; + 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((ndo, " ")); + for (i = 0; i < optlen && i < 10; i++) + ND_PRINT((ndo, "%02x", EXTRACT_U_1(tp + i))); + ND_PRINT((ndo, "...)")); break; - default: - if (len != p->len) - goto trunc; + case DH6OPT_RECONF_MSG: + if (optlen != 1) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + dh6_reconf_type = EXTRACT_U_1(tp); + switch (dh6_reconf_type) { + case DH6_RENEW: + ND_PRINT((ndo, " for renew)")); + break; + case DH6_INFORM_REQ: + ND_PRINT((ndo, " for inf-req)")); + break; + default: + ND_PRINT((ndo, " for ?\?\?(%02x))", dh6_reconf_type)); + break; + } break; - } - if (cp + 4 + len > ep) { - printf(" [|%s]", p->name); - return; - } - - printf(" (%s, ", p->name); - switch (p->type) { - case OT6_V6: - for (i = 0; i < len; i += 16) { - inet_ntop(AF_INET6, &cp[4 + i], buf, - sizeof(buf)); - if (i != 0) - printf(","); - printf("%s", buf); + case DH6OPT_RECONF_ACCEPT: /* nothing todo */ + ND_PRINT((ndo, ")")); + 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((ndo, " ?)")); + break; } + tp = (const u_char *)(dh6o + 1); + for (i = 0; i < optlen; i += 16) + ND_PRINT((ndo, " %s", ip6addr_string(ndo, tp + i))); + ND_PRINT((ndo, ")")); break; - case OT6_STR: - memset(&buf, 0, sizeof(buf)); - strncpy(buf, &cp[4], len); - printf("%s", buf); + case DH6OPT_SIP_SERVER_D: + case DH6OPT_DOMAIN_LIST: + tp = (const u_char *)(dh6o + 1); + while (tp < cp + sizeof(*dh6o) + optlen) { + ND_PRINT((ndo, " ")); + if ((tp = ns_nprint(ndo, tp, cp + sizeof(*dh6o) + optlen)) == NULL) + goto trunc; + } + ND_PRINT((ndo, ")")); break; - case OT6_NUM: - printf("%d", (u_int32_t)ntohl(*(u_int32_t *)&cp[4])); + case DH6OPT_STATUS_CODE: + if (optlen < 2) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %s)", dhcp6stcode(EXTRACT_BE_U_2(tp)))); break; + case DH6OPT_IA_NA: + case DH6OPT_IA_PD: + if (optlen < 12) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " IAID:%u T1:%u T2:%u", + EXTRACT_BE_U_4(tp), + EXTRACT_BE_U_4(tp + 4), + EXTRACT_BE_U_4(tp + 8))); + if (optlen > 12) { + /* there are sub-options */ + dhcp6opt_print(ndo, tp + 12, tp + optlen); + } + ND_PRINT((ndo, ")")); + break; + case DH6OPT_IA_TA: + if (optlen < 4) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " IAID:%u", EXTRACT_BE_U_4(tp))); + if (optlen > 4) { + /* there are sub-options */ + dhcp6opt_print(ndo, tp + 4, tp + optlen); + } + ND_PRINT((ndo, ")")); + break; + case DH6OPT_IA_PD_PREFIX: + if (optlen < 25) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %s/%d", ip6addr_string(ndo, tp + 9), EXTRACT_U_1(tp + 8))); + ND_PRINT((ndo, " pltime:%u vltime:%u", + EXTRACT_BE_U_4(tp), + EXTRACT_BE_U_4(tp + 4))); + if (optlen > 25) { + /* there are sub-options */ + dhcp6opt_print(ndo, tp + 25, tp + optlen); + } + ND_PRINT((ndo, ")")); + break; + case DH6OPT_LIFETIME: + case DH6OPT_CLT_TIME: + if (optlen != 4) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %d)", EXTRACT_BE_U_4(tp))); + break; + case DH6OPT_REMOTE_ID: + if (optlen < 4) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %d ", EXTRACT_BE_U_4(tp))); + /* + * Print hex dump first 10 characters. + */ + for (i = 4; i < optlen && i < 14; i++) + ND_PRINT((ndo, "%02x", EXTRACT_U_1(tp + i))); + ND_PRINT((ndo, "...)")); + break; + case DH6OPT_LQ_QUERY: + if (optlen < 17) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + dh6_lq_query_type = EXTRACT_U_1(tp); + switch (dh6_lq_query_type) { + case 1: + ND_PRINT((ndo, " by-address")); + break; + case 2: + ND_PRINT((ndo, " by-clientID")); + break; + default: + ND_PRINT((ndo, " type_%u", dh6_lq_query_type)); + break; + } + ND_PRINT((ndo, " %s", ip6addr_string(ndo, tp + 1))); + if (optlen > 17) { + /* there are query-options */ + dhcp6opt_print(ndo, tp + 17, tp + optlen); + } + ND_PRINT((ndo, ")")); + 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((ndo, ")")); + break; + case DH6OPT_LQ_RELAY_DATA: + if (optlen < 16) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %s ", ip6addr_string(ndo, tp))); + /* + * Print hex dump first 10 characters. + */ + for (i = 16; i < optlen && i < 26; i++) + ND_PRINT((ndo, "%02x", EXTRACT_U_1(tp + i))); + ND_PRINT((ndo, "...)")); + break; + case DH6OPT_NTP_SERVER: + if (optlen < 4) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + while (tp < cp + sizeof(*dh6o) + optlen - 4) { + subopt_code = EXTRACT_BE_U_2(tp); + tp += 2; + subopt_len = EXTRACT_BE_U_2(tp); + tp += 2; + if (tp + subopt_len > cp + sizeof(*dh6o) + optlen) + goto trunc; + ND_PRINT((ndo, " subopt:%d", subopt_code)); + switch (subopt_code) { + case DH6OPT_NTP_SUBOPTION_SRV_ADDR: + case DH6OPT_NTP_SUBOPTION_MC_ADDR: + if (subopt_len != 16) { + ND_PRINT((ndo, " ?")); + break; + } + ND_PRINT((ndo, " %s", ip6addr_string(ndo, tp))); + break; + case DH6OPT_NTP_SUBOPTION_SRV_FQDN: + ND_PRINT((ndo, " ")); + if (ns_nprint(ndo, tp, tp + subopt_len) == NULL) + goto trunc; + break; + default: + ND_PRINT((ndo, " ?")); + break; + } + tp += subopt_len; + } + ND_PRINT((ndo, ")")); + break; + case DH6OPT_AFTR_NAME: + if (optlen < 3) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + remain_len = optlen; + ND_PRINT((ndo, " ")); + /* Encoding is described in section 3.1 of RFC 1035 */ + while (remain_len && EXTRACT_U_1(tp)) { + label_len = EXTRACT_U_1(tp); + tp++; + if (label_len < remain_len - 1) { + (void)fn_printn(ndo, tp, label_len, NULL); + tp += label_len; + remain_len -= (label_len + 1); + if(EXTRACT_U_1(tp)) ND_PRINT((ndo, ".")); + } else { + ND_PRINT((ndo, " ?")); + break; + } + } + ND_PRINT((ndo, ")")); + 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((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, "=")); + (void)fn_printn(ndo, tp, (u_int)optlen, NULL); + ND_PRINT((ndo, ")")); + break; + default: - for (i = 0; i < len; i++) - printf("%02x", cp[4 + i] & 0xff); + ND_PRINT((ndo, ")")); + break; } - printf(")"); - cp += len + 4; + + cp += sizeof(*dh6o) + optlen; } return; trunc: - printf("[|dhcp6ext]"); + ND_PRINT((ndo, "[|dhcp6ext]")); } /* - * Print dhcp6 requests + * Print dhcp6 packets */ void -dhcp6_print(register const u_char *cp, u_int length, - u_int16_t sport, u_int16_t dport) +dhcp6_print(netdissect_options *ndo, + const u_char *cp, u_int length) { - union dhcp6 *dh6; - u_char *ep; - u_char *extp; - u_int16_t field16; + const struct dhcp6 *dh6; + const struct dhcp6_relay *dh6relay; + const u_char *ep; + const u_char *extp; + const char *name; - printf("dhcp6"); + ND_PRINT((ndo, "dhcp6")); - ep = (u_char *)snapend; + ep = (const u_char *)ndo->ndo_snapend; + if (cp + length < ep) + ep = cp + length; - dh6 = (union dhcp6 *)cp; - TCHECK(dh6->dh6_msgtype); - switch (dh6->dh6_msgtype) { - case DH6_SOLICIT: - if (!(vflag && TTEST(dh6->dh6_sol.dh6sol_relayaddr))) { - printf(" solicit"); - break; - } + dh6 = (const struct dhcp6 *)cp; + dh6relay = (const struct dhcp6_relay *)cp; + ND_TCHECK(dh6->dh6_xid); + name = tok2str(dh6_msgtype_str, "msgtype-%u", dh6->dh6_msgtype); - printf(" solicit ("); /*)*/ - if (dh6->dh6_sol.dh6sol_flags != 0) { - u_int8_t f = dh6->dh6_sol.dh6sol_flags; - printf("%s%s ", - (f & DH6SOL_PREFIX) ? "P" : "", - (f & DH6SOL_CLOSE) ? "C" : ""); - } + if (!ndo->ndo_vflag) { + ND_PRINT((ndo, " %s", name)); + return; + } - memcpy(&field16, &dh6->dh6_sol.dh6sol_plen_id, - sizeof(field16)); - field16 = ntohs(field16); - if (field16 & ~DH6SOL_SOLICIT_PLEN_MASK) - printf("plen=%d ", DH6SOL_SOLICIT_PLEN(field16)); - printf("solicit-ID=%d", DH6SOL_SOLICIT_ID(field16)); - - printf(" cliaddr=%s", - ip6addr_string(&dh6->dh6_sol.dh6sol_cliaddr)); - printf(" relayaddr=%s", - ip6addr_string(&dh6->dh6_sol.dh6sol_relayaddr)); - /*(*/ - printf(")"); - break; - case DH6_ADVERT: - if (!(vflag && TTEST(dh6->dh6_adv.dh6adv_serveraddr))) { - printf(" advert"); - break; - } - printf(" advert ("); /*)*/ - memcpy(&field16, &dh6->dh6_adv.dh6adv_rsv_id, sizeof(field16)); - printf("solicit-ID=%d", - ntohs(field16) & DH6SOL_SOLICIT_ID_MASK); - printf(" pref=%u", dh6->dh6_adv.dh6adv_pref); - printf(" cliaddr=%s", - ip6addr_string(&dh6->dh6_adv.dh6adv_cliaddr)); - printf(" relayaddr=%s", - ip6addr_string(&dh6->dh6_adv.dh6adv_relayaddr)); - printf(" servaddr=%s", - ip6addr_string(&dh6->dh6_adv.dh6adv_serveraddr)); - extp = (u_char *)((&dh6->dh6_adv) + 1); - dhcp6ext_print(extp, ep); - /*(*/ - printf(")"); - break; - case DH6_REQUEST: - if (!(vflag && TTEST(dh6->dh6_req.dh6req_relayaddr))) { - printf(" request"); - break; - } - printf(" request ("); /*)*/ - if (dh6->dh6_req.dh6req_flags != 0) { - u_int8_t f = dh6->dh6_req.dh6req_flags; - printf("%s%s ", - (f & DH6REQ_CLOSE) ? "C" : "", - (f & DH6REQ_REBOOT) ? "R" : ""); - } - printf("xid=0x%04x", dh6->dh6_req.dh6req_xid); - printf(" cliaddr=%s", - ip6addr_string(&dh6->dh6_req.dh6req_cliaddr)); - printf(" relayaddr=%s", - ip6addr_string(&dh6->dh6_req.dh6req_relayaddr)); - printf(" servaddr=%s", - ip6addr_string(&dh6->dh6_req.dh6req_serveraddr)); - dhcp6ext_print((char *)(&dh6->dh6_req + 1), ep); - /*(*/ - printf(")"); - break; - case DH6_REPLY: - if (!(vflag && TTEST(dh6->dh6_rep.dh6rep_xid))) { - printf(" reply"); - break; - } - printf(" reply ("); /*)*/ - if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_RELAYPRESENT) != 0) - printf("R "); - printf("stat=0x%02x", - dh6->dh6_rep.dh6rep_flagandstat & DH6REP_STATMASK); - printf(" xid=0x%04x", dh6->dh6_rep.dh6rep_xid); - printf(" cliaddr=%s", - ip6addr_string(&dh6->dh6_rep.dh6rep_cliaddr)); - extp = (u_char *)((&dh6->dh6_rep) + 1); - if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_RELAYPRESENT) != - 0) { - printf(" relayaddr=%s", ip6addr_string(extp)); - extp += sizeof(struct in6_addr); - } - dhcp6ext_print(extp, ep); - /*(*/ - printf(")"); - break; - case DH6_RELEASE: - printf(" release"); - break; - case DH6_RECONFIG: - printf(" reconfig"); - break; + /* XXX relay agent messages have to be handled differently */ + + ND_PRINT((ndo, " %s (", name)); /*)*/ + if (dh6->dh6_msgtype != DH6_RELAY_FORW && + dh6->dh6_msgtype != DH6_RELAY_REPLY) { + ND_PRINT((ndo, "xid=%x", EXTRACT_BE_U_4(&dh6->dh6_xid) & DH6_XIDMASK)); + extp = (const u_char *)(dh6 + 1); + dhcp6opt_print(ndo, extp, ep); + } else { /* relay messages */ + struct in6_addr addr6; + + ND_TCHECK(dh6relay->dh6relay_peeraddr); + + memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6)); + ND_PRINT((ndo, "linkaddr=%s", ip6addr_string(ndo, &addr6))); + + memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6)); + ND_PRINT((ndo, " peeraddr=%s", ip6addr_string(ndo, &addr6))); + + dhcp6opt_print(ndo, (const u_char *)(dh6relay + 1), ep); } + /*(*/ + ND_PRINT((ndo, ")")); return; trunc: - printf("%s", tstr); + ND_PRINT((ndo, "[|dhcp6]")); }