X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/4c6bada75863c064314bc52daf899e37cc8b39e3..0845bc813c1cc48b18cdefff0b387c110647463c:/print-dhcp6.c diff --git a/print-dhcp6.c b/print-dhcp6.c index 2a570ff1..f6225d72 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 @@ -27,31 +27,34 @@ * SUCH DAMAGE. */ /* - * draft-ietf-dhc-dhcpv6-22.txt + * 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, */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.17 2002-06-01 23:50:30 guy Exp $"; -#endif - #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include -#include -#include +#include -#include - -#include #include #include -#include -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" +#include "extract.h" + +/* lease duration */ +#define DHCP6_DURATION_INFINITE 0xffffffff /* Error Values */ #define DH6ERR_FAILURE 16 @@ -61,112 +64,681 @@ static const char rcsid[] = #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 { - u_int8_t m; - u_int32_t x; + uint8_t m; + uint32_t x; } dh6_msgtypexid; - struct in6_addr dh6_servaddr; /* options follow */ -} __attribute__ ((__packed__)); +}; #define dh6_msgtype dh6_msgtypexid.m #define dh6_xid dh6_msgtypexid.x #define DH6_XIDMASK 0x00ffffff -/* option */ -#define DH6OPT_DUID 1 /* TBD */ -#define DH6OPT_DNS 11 /* TBD */ +/* DHCPv6 relay messages */ +struct dhcp6_relay { + uint8_t dh6relay_msgtype; + uint8_t dh6relay_hcnt; + uint8_t dh6relay_linkaddr[16]; /* XXX: badly aligned */ + uint8_t dh6relay_peeraddr[16]; + /* 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 + +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" }, + { 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 { - u_int16_t dh6opt_type; - u_int16_t dh6opt_len; + uint16_t dh6opt_type; + uint16_t dh6opt_len; /* type-dependent data follows */ -} __attribute__ ((__packed__)); +}; + +static const char * +dhcp6stcode(const uint16_t code) +{ + return code > 255 ? "INVALID code" : tok2str(dh6opt_stcode_str, "code%u", code); +} static void -dhcp6opt_print(u_char *cp, u_char *ep) +dhcp6opt_print(netdissect_options *ndo, + const u_char *cp, const u_char *ep) { - struct dhcp6opt *dh6o; - u_char *tp; - int i; + const struct dhcp6opt *dh6o; + const u_char *tp; + size_t i; + uint16_t opttype; size_t optlen; + uint8_t auth_proto; + u_int authinfolen, authrealmlen; + int remain_len; /* Length of remaining options */ + int label_len; /* Label length */ + uint16_t subopt_code; + uint16_t subopt_len; if (cp == ep) return; while (cp < ep) { - if (ep - cp < sizeof(*dh6o)) + if (ep < cp + sizeof(*dh6o)) goto trunc; - dh6o = (struct dhcp6opt *)cp; - optlen = ntohs(dh6o->dh6opt_len); - if (ep - cp < sizeof(*dh6o) + optlen) + dh6o = (const struct dhcp6opt *)cp; + ND_TCHECK(*dh6o); + optlen = EXTRACT_16BITS(&dh6o->dh6opt_len); + if (ep < cp + sizeof(*dh6o) + optlen) goto trunc; - switch (ntohs(dh6o->dh6opt_type)) { - case DH6OPT_DUID: - printf(" (duid"); /*)*/ + opttype = EXTRACT_16BITS(&dh6o->dh6opt_type); + ND_PRINT((ndo, " (%s", tok2str(dh6opt_str, "opt_%u", opttype))); + switch (opttype) { + case DH6OPT_CLIENTID: + case DH6OPT_SERVERID: if (optlen < 2) { /*(*/ - printf(" ??)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - switch (ntohs(*(u_int16_t *)tp)) { + tp = (const u_char *)(dh6o + 1); + switch (EXTRACT_16BITS(tp)) { case 1: if (optlen >= 2 + 6) { - printf(" hwaddr/time time %u type %u ", - ntohl(*(u_int32_t *)&tp[2]), - ntohs(*(u_int16_t *)&tp[6])); + ND_PRINT((ndo, " hwaddr/time type %u time %u ", + EXTRACT_16BITS(&tp[2]), + EXTRACT_32BITS(&tp[4]))); for (i = 8; i < optlen; i++) - printf("%02x", tp[i]); + ND_PRINT((ndo, "%02x", tp[i])); /*(*/ - printf(")"); + ND_PRINT((ndo, ")")); } else { /*(*/ - printf(" ??)"); + ND_PRINT((ndo, " ?)")); } break; case 2: if (optlen >= 2 + 8) { - printf(" vid "); + ND_PRINT((ndo, " vid ")); for (i = 2; i < 2 + 8; i++) - printf("%02x", tp[i]); + ND_PRINT((ndo, "%02x", tp[i])); /*(*/ - printf(")"); + ND_PRINT((ndo, ")")); } else { /*(*/ - printf(" ??)"); + ND_PRINT((ndo, " ?)")); } break; case 3: if (optlen >= 2 + 2) { - printf(" hwaddr type %u ", - ntohs(*(u_int16_t *)&tp[2])); + ND_PRINT((ndo, " hwaddr type %u ", + EXTRACT_16BITS(&tp[2]))); for (i = 4; i < optlen; i++) - printf("%02x", tp[i]); + ND_PRINT((ndo, "%02x", tp[i])); /*(*/ - printf(")"); + ND_PRINT((ndo, ")")); } else { /*(*/ - printf(" ??)"); + ND_PRINT((ndo, " ?)")); } + break; + default: + ND_PRINT((ndo, " type %d)", EXTRACT_16BITS(tp))); + break; } break; - case DH6OPT_DNS: - printf(" (dnsserver"); /*)*/ - if (optlen % 16) { + case DH6OPT_IA_ADDR: + if (optlen < 24) { /*(*/ - printf(" ??)"); + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[0]))); + ND_PRINT((ndo, " pltime:%u vltime:%u", + EXTRACT_32BITS(&tp[16]), + EXTRACT_32BITS(&tp[20]))); + if (optlen > 24) { + /* there are sub-options */ + dhcp6opt_print(ndo, tp + 24, tp + optlen); + } + ND_PRINT((ndo, ")")); + break; + 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_16BITS(&tp[i])))); + } + ND_PRINT((ndo, ")")); + break; + case DH6OPT_PREFERENCE: + if (optlen != 1) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %d)", *tp)); + break; + case DH6OPT_ELAPSED_TIME: + if (optlen != 2) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %d)", EXTRACT_16BITS(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 = *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++; + switch (*tp) { + case DH6OPT_AUTHALG_HMACMD5: + /* XXX: may depend on the protocol */ + ND_PRINT((ndo, ", alg: HMAC-MD5")); + break; + default: + ND_PRINT((ndo, ", alg: %d", *tp)); + break; + } + tp++; + switch (*tp) { + case DH6OPT_AUTHRDM_MONOCOUNTER: + ND_PRINT((ndo, ", RDM: mono")); + break; + default: + ND_PRINT((ndo, ", RDM: %d", *tp)); + break; + } + tp++; + ND_PRINT((ndo, ", RD:")); + for (i = 0; i < 4; i++, tp += 2) + ND_PRINT((ndo, " %04x", EXTRACT_16BITS(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", *tp)); + ND_PRINT((ndo, ", key ID: %08x", EXTRACT_32BITS(tp))); + tp += 4; + ND_PRINT((ndo, ", HMAC-MD5:")); + for (i = 0; i < 4; i++, tp+= 4) + ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tp))); + break; + case DH6OPT_AUTHPROTO_RECONFIG: + if (authinfolen != 17) { + ND_PRINT((ndo, " ??")); + break; + } + switch (*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; + } + ND_PRINT((ndo, " value:")); + for (i = 0; i < 4; i++, tp+= 4) + ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tp))); + break; + default: + ND_PRINT((ndo, " ??")); + break; + } + + ND_PRINT((ndo, ")")); + break; + case DH6OPT_RAPID_COMMIT: /* nothing todo */ + ND_PRINT((ndo, ")")); + 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((ndo, " ")); + for (i = 0; i < optlen && i < 10; i++) + ND_PRINT((ndo, "%02x", tp[i])); + ND_PRINT((ndo, "...)")); + break; + case DH6OPT_RECONF_MSG: + tp = (const u_char *)(dh6o + 1); + switch (*tp) { + 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))", *tp)); + break; + } + break; + 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 = (u_char *)(dh6o + 1); + tp = (const u_char *)(dh6o + 1); for (i = 0; i < optlen; i += 16) - printf(" %s", ip6addr_string(&tp[i])); - /*(*/ - printf(")"); + ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[i]))); + ND_PRINT((ndo, ")")); + break; + 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 DH6OPT_STATUS_CODE: + if (optlen < 2) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0])))); + 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_32BITS(&tp[0]), + EXTRACT_32BITS(&tp[4]), + EXTRACT_32BITS(&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_32BITS(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]), tp[8])); + ND_PRINT((ndo, " pltime:%u vltime:%u", + EXTRACT_32BITS(&tp[0]), + EXTRACT_32BITS(&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_32BITS(tp))); + break; + case DH6OPT_REMOTE_ID: + if (optlen < 4) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %d ", EXTRACT_32BITS(tp))); + /* + * Print hex dump first 10 characters. + */ + for (i = 4; i < optlen && i < 14; i++) + ND_PRINT((ndo, "%02x", tp[i])); + ND_PRINT((ndo, "...)")); + break; + case DH6OPT_LQ_QUERY: + if (optlen < 17) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); + switch (*tp) { + case 1: + ND_PRINT((ndo, " by-address")); + break; + case 2: + ND_PRINT((ndo, " by-clientID")); + break; + default: + ND_PRINT((ndo, " type_%d", (int)*tp)); + 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[0]))); + /* + * Print hex dump first 10 characters. + */ + for (i = 16; i < optlen && i < 26; i++) + ND_PRINT((ndo, "%02x", 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_16BITS(tp); + tp += 2; + subopt_len = EXTRACT_16BITS(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[0]))); + 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 && *tp) { + label_len = *tp++; + if (label_len < remain_len - 1) { + ND_PRINT((ndo, "%.*s", label_len, tp)); + tp += label_len; + remain_len -= (label_len + 1); + if(*tp) ND_PRINT((ndo, ".")); + } else { + ND_PRINT((ndo, " ?")); + break; + } + } + ND_PRINT((ndo, ")")); + break; default: - printf(" (opt-%u)", ntohs(dh6o->dh6opt_type)); + ND_PRINT((ndo, ")")); break; } @@ -175,61 +747,63 @@ dhcp6opt_print(u_char *cp, u_char *ep) return; trunc: - printf("[|dhcp6ext]"); + ND_PRINT((ndo, "[|dhcp6ext]")); } /* * 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) { - struct dhcp6 *dh6; - u_char *ep; - u_char *extp; + const struct dhcp6 *dh6; + const struct dhcp6_relay *dh6relay; + const u_char *ep; + const u_char *extp; const char *name; - printf("dhcp6"); - - ep = (u_char *)snapend; - - dh6 = (struct dhcp6 *)cp; - TCHECK(dh6->dh6_servaddr); - switch (dh6->dh6_msgtype) { - case DH6_REPLY: - name = "reply"; - break; - case DH6_INFORM_REQ: - name= "inf-req"; - break; - default: - name = NULL; - break; - } + ND_PRINT((ndo, "dhcp6")); - if (!vflag) { - if (name) - printf(" %s", name); - else - printf(" msgtype-%u", dh6->dh6_msgtype); + ep = (const u_char *)ndo->ndo_snapend; + if (cp + length < ep) + ep = cp + length; + + 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); + + if (!ndo->ndo_vflag) { + ND_PRINT((ndo, " %s", name)); return; } /* XXX relay agent messages have to be handled differently */ - if (name) - printf(" %s (", name); /*)*/ - else - printf(" msgtype-%u (", dh6->dh6_msgtype); /*)*/ - printf("xid=%x", ntohl(dh6->dh6_xid) & DH6_XIDMASK); - printf(" server=%s", ip6addr_string(&dh6->dh6_servaddr)); - extp = (u_char *)(dh6 + 1); - dhcp6opt_print(extp, ep); + ND_PRINT((ndo, " %s (", name)); /*)*/ + if (dh6->dh6_msgtype != DH6_RELAY_FORW && + dh6->dh6_msgtype != DH6_RELAY_REPLY) { + ND_PRINT((ndo, "xid=%x", EXTRACT_32BITS(&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); + } /*(*/ - printf(")"); + ND_PRINT((ndo, ")")); return; trunc: - printf("[|dhcp6]"); + ND_PRINT((ndo, "[|dhcp6]")); }