X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/639ccfcfabeab5eb903d64678cd57c31a97782ba..47fc89d711eec0a073d9b3b293a1af901b5bd791:/print-dhcp6.c diff --git a/print-dhcp6.c b/print-dhcp6.c index 7a3e4eea..8a119ff5 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 @@ -27,34 +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 1.16 2002-01-19 08:05:54 guy Exp $"; -#endif - #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include -#include -#include - -struct mbuf; -struct rtentry; +#include -#include - -#include #include #include -#include #include "interface.h" #include "addrtoname.h" +#include "extract.h" + +/* lease duration */ +#define DHCP6_DURATION_INFINITE 0xffffffff /* Error Values */ #define DH6ERR_FAILURE 16 @@ -64,8 +64,21 @@ struct rtentry; #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 /* DHCP6 base packet format */ struct dhcp6 { @@ -73,61 +86,296 @@ struct dhcp6 { u_int8_t m; u_int32_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 { + u_int8_t dh6relay_msgtype; + u_int8_t dh6relay_hcnt; + u_int8_t dh6relay_linkaddr[16]; /* XXX: badly aligned */ + u_int8_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 + struct dhcp6opt { u_int16_t dh6opt_type; u_int16_t dh6opt_len; /* type-dependent data follows */ -} __attribute__ ((__packed__)); +}; + +static const char * +dhcp6opt_name(int type) +{ + static char genstr[sizeof("opt_65535") + 1]; /* XXX thread unsafe */ + + if (type > 65535) + return "INVALID-option"; + + switch(type) { + case DH6OPT_CLIENTID: + return "client-ID"; + case DH6OPT_SERVERID: + return "server-ID"; + case DH6OPT_IA_NA: + return "IA_NA"; + case DH6OPT_IA_TA: + return "IA_TA"; + case DH6OPT_IA_ADDR: + return "IA_ADDR"; + case DH6OPT_ORO: + return "option-request"; + case DH6OPT_PREFERENCE: + return "preference"; + case DH6OPT_ELAPSED_TIME: + return "elapsed-time"; + case DH6OPT_RELAY_MSG: + return "relay-message"; + case DH6OPT_AUTH: + return "authentication"; + case DH6OPT_UNICAST: + return "server-unicast"; + case DH6OPT_STATUS_CODE: + return "status-code"; + case DH6OPT_RAPID_COMMIT: + return "rapid-commit"; + case DH6OPT_USER_CLASS: + return "user-class"; + case DH6OPT_VENDOR_CLASS: + return "vendor-class"; + case DH6OPT_VENDOR_OPTS: + return "vendor-specific-info"; + case DH6OPT_INTERFACE_ID: + return "interface-ID"; + case DH6OPT_RECONF_MSG: + return "reconfigure-message"; + case DH6OPT_RECONF_ACCEPT: + return "reconfigure-accept"; + case DH6OPT_SIP_SERVER_D: + return "SIP-servers-domain"; + case DH6OPT_SIP_SERVER_A: + return "SIP-servers-address"; + case DH6OPT_DNS_SERVERS: + return "DNS-server"; + case DH6OPT_DOMAIN_LIST: + return "DNS-search-list"; + case DH6OPT_IA_PD: + return "IA_PD"; + case DH6OPT_IA_PD_PREFIX: + return "IA_PD-prefix"; + case DH6OPT_SNTP_SERVERS: + return "SNTP-servers"; + case DH6OPT_LIFETIME: + return "lifetime"; + case DH6OPT_NIS_SERVERS: + return "NIS-server"; + case DH6OPT_NISP_SERVERS: + return "NIS+-server"; + case DH6OPT_NIS_NAME: + return "NIS-domain-name"; + case DH6OPT_NISP_NAME: + return "NIS+-domain-name"; + case DH6OPT_BCMCS_SERVER_D: + return "BCMCS-domain-name"; + case DH6OPT_BCMCS_SERVER_A: + return "BCMCS-server"; + case DH6OPT_GEOCONF_CIVIC: + return "Geoconf-Civic"; + case DH6OPT_REMOTE_ID: + return "Remote-ID"; + case DH6OPT_SUBSCRIBER_ID: + return "Subscriber-ID"; + case DH6OPT_CLIENT_FQDN: + return "Client-FQDN"; + case DH6OPT_PANA_AGENT: + return "PANA-agent"; + case DH6OPT_NEW_POSIX_TIMEZONE: + return "POSIX-timezone"; + case DH6OPT_NEW_TZDB_TIMEZONE: + return "POSIX-tz-database"; + case DH6OPT_ERO: + return "Echo-request-option"; + case DH6OPT_LQ_QUERY: + return "Lease-query"; + case DH6OPT_CLIENT_DATA: + return "LQ-client-data"; + case DH6OPT_CLT_TIME: + return "Clt-time"; + case DH6OPT_LQ_RELAY_DATA: + return "LQ-relay-data"; + case DH6OPT_LQ_CLIENT_LINK: + return "LQ-client-link"; + case DH6OPT_NTP_SERVER: + return "NTP-server"; + case DH6OPT_AFTR_NAME: + return "AFTR-Name"; + default: + snprintf(genstr, sizeof(genstr), "opt_%d", type); + return(genstr); + } +} + +static const char * +dhcp6stcode(int code) +{ + static char genstr[sizeof("code255") + 1]; /* XXX thread unsafe */ + + if (code > 255) + return "INVALID code"; + + switch(code) { + case DH6OPT_STCODE_SUCCESS: + return "success"; + case DH6OPT_STCODE_UNSPECFAIL: + return "unspec failure"; + case DH6OPT_STCODE_NOADDRAVAIL: + return "no addresses"; + case DH6OPT_STCODE_NOBINDING: + return "no binding"; + case DH6OPT_STCODE_NOTONLINK: + return "not on-link"; + case DH6OPT_STCODE_USEMULTICAST: + return "use multicast"; + case DH6OPT_STCODE_NOPREFIXAVAIL: + return "no prefixes"; + case DH6OPT_STCODE_UNKNOWNQUERYTYPE: + return "unknown query type"; + case DH6OPT_STCODE_MALFORMEDQUERY: + return "malformed query"; + case DH6OPT_STCODE_NOTCONFIGURED: + return "not configured"; + case DH6OPT_STCODE_NOTALLOWED: + return "not allowed"; + default: + snprintf(genstr, sizeof(genstr), "code%d", code); + return(genstr); + } +} static void -dhcp6opt_print(u_char *cp, u_char *ep) +dhcp6opt_print(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; + u_int16_t opttype; size_t optlen; + u_int8_t auth_proto; + u_int authinfolen, authrealmlen; + int remain_len; /* Length of remaining options */ + int label_len; /* Label length */ + u_int16_t subopt_code; + u_int16_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) + 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); + printf(" (%s", dhcp6opt_name(opttype)); + switch (opttype) { + case DH6OPT_CLIENTID: + case DH6OPT_SERVERID: if (optlen < 2) { /*(*/ - printf(" ??)"); + printf(" ?)"); break; } tp = (u_char *)(dh6o + 1); - switch (ntohs(*(u_int16_t *)tp)) { + 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])); + printf(" hwaddr/time type %u time %u ", + EXTRACT_16BITS(&tp[2]), + EXTRACT_32BITS(&tp[4])); for (i = 8; i < optlen; i++) printf("%02x", tp[i]); /*(*/ printf(")"); } else { /*(*/ - printf(" ??)"); + printf(" ?)"); } break; case 2: @@ -139,37 +387,413 @@ dhcp6opt_print(u_char *cp, u_char *ep) printf(")"); } else { /*(*/ - printf(" ??)"); + printf(" ?)"); } break; case 3: if (optlen >= 2 + 2) { printf(" hwaddr type %u ", - ntohs(*(u_int16_t *)&tp[2])); + EXTRACT_16BITS(&tp[2])); for (i = 4; i < optlen; i++) printf("%02x", tp[i]); /*(*/ printf(")"); } else { /*(*/ - printf(" ??)"); + printf(" ?)"); } + break; + default: + printf(" type %d)", EXTRACT_16BITS(tp)); + break; } break; - case DH6OPT_DNS: - printf(" (dnsserver"); /*)*/ - if (optlen % 16) { + case DH6OPT_IA_ADDR: + if (optlen < 24) { /*(*/ - printf(" ??)"); + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + printf(" %s", ip6addr_string(&tp[0])); + printf(" pltime:%u vltime:%u", + EXTRACT_32BITS(&tp[16]), + EXTRACT_32BITS(&tp[20])); + if (optlen > 24) { + /* there are sub-options */ + dhcp6opt_print(tp + 24, tp + optlen); + } + printf(")"); + break; + case DH6OPT_ORO: + case DH6OPT_ERO: + if (optlen % 2) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + for (i = 0; i < optlen; i += 2) { + printf(" %s", + dhcp6opt_name(EXTRACT_16BITS(&tp[i]))); + } + printf(")"); + break; + case DH6OPT_PREFERENCE: + if (optlen != 1) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + printf(" %d)", *tp); + break; + case DH6OPT_ELAPSED_TIME: + if (optlen != 2) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + printf(" %d)", EXTRACT_16BITS(tp)); + break; + case DH6OPT_RELAY_MSG: + printf(" ("); + tp = (u_char *)(dh6o + 1); + dhcp6_print(tp, optlen); + printf(")"); + break; + case DH6OPT_AUTH: + if (optlen < 11) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + auth_proto = *tp; + switch (auth_proto) { + case DH6OPT_AUTHPROTO_DELAYED: + printf(" proto: delayed"); + break; + case DH6OPT_AUTHPROTO_RECONFIG: + printf(" proto: reconfigure"); + break; + default: + printf(" proto: %d", auth_proto); + break; + } + tp++; + switch (*tp) { + case DH6OPT_AUTHALG_HMACMD5: + /* XXX: may depend on the protocol */ + printf(", alg: HMAC-MD5"); + break; + default: + printf(", alg: %d", *tp); + break; + } + tp++; + switch (*tp) { + case DH6OPT_AUTHRDM_MONOCOUNTER: + printf(", RDM: mono"); + break; + default: + printf(", RDM: %d", *tp); + break; + } + tp++; + printf(", RD:"); + for (i = 0; i < 4; i++, tp += 2) + printf(" %04x", EXTRACT_16BITS(tp)); + + /* protocol dependent part */ + authinfolen = optlen - 11; + switch (auth_proto) { + case DH6OPT_AUTHPROTO_DELAYED: + if (authinfolen == 0) + break; + if (authinfolen < 20) { + printf(" ??"); + break; + } + authrealmlen = authinfolen - 20; + if (authrealmlen > 0) { + printf(", realm: "); + } + for (i = 0; i < authrealmlen; i++, tp++) + printf("%02x", *tp); + printf(", key ID: %08x", EXTRACT_32BITS(tp)); + tp += 4; + printf(", HMAC-MD5:"); + for (i = 0; i < 4; i++, tp+= 4) + printf(" %08x", EXTRACT_32BITS(tp)); + break; + case DH6OPT_AUTHPROTO_RECONFIG: + if (authinfolen != 17) { + printf(" ??"); + break; + } + switch (*tp++) { + case DH6OPT_AUTHRECONFIG_KEY: + printf(" reconfig-key"); + break; + case DH6OPT_AUTHRECONFIG_HMACMD5: + printf(" type: HMAC-MD5"); + break; + default: + printf(" type: ??"); + break; + } + printf(" value:"); + for (i = 0; i < 4; i++, tp+= 4) + printf(" %08x", EXTRACT_32BITS(tp)); + break; + default: + printf(" ??"); + break; + } + + printf(")"); + break; + case DH6OPT_RAPID_COMMIT: /* nothing todo */ + printf(")"); + break; + case DH6OPT_INTERFACE_ID: + case DH6OPT_SUBSCRIBER_ID: + /* + * Since we cannot predict the encoding, print hex dump + * at most 10 characters. + */ + tp = (u_char *)(dh6o + 1); + printf(" "); + for (i = 0; i < optlen && i < 10; i++) + printf("%02x", tp[i]); + printf("...)"); + break; + case DH6OPT_RECONF_MSG: + tp = (u_char *)(dh6o + 1); + switch (*tp) { + case DH6_RENEW: + printf(" for renew)"); + break; + case DH6_INFORM_REQ: + printf(" for inf-req)"); + break; + default: + printf(" for ?\?\?(%02x))", *tp); + break; + } + break; + case DH6OPT_RECONF_ACCEPT: /* nothing todo */ + printf(")"); + 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) { + printf(" ?)"); break; } tp = (u_char *)(dh6o + 1); for (i = 0; i < optlen; i += 16) printf(" %s", ip6addr_string(&tp[i])); - /*(*/ printf(")"); + break; + case DH6OPT_SIP_SERVER_D: + case DH6OPT_DOMAIN_LIST: + tp = (u_char *)(dh6o + 1); + while (tp < cp + sizeof(*dh6o) + optlen) { + putchar(' '); + if ((tp = ns_nprint(tp, cp + sizeof(*dh6o) + optlen)) == NULL) + goto trunc; + } + printf(")"); + break; + case DH6OPT_STATUS_CODE: + if (optlen < 2) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + printf(" %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0]))); + break; + case DH6OPT_IA_NA: + case DH6OPT_IA_PD: + if (optlen < 12) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + printf(" 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(tp + 12, tp + optlen); + } + printf(")"); + break; + case DH6OPT_IA_TA: + if (optlen < 4) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + printf(" IAID:%u", EXTRACT_32BITS(tp)); + if (optlen > 4) { + /* there are sub-options */ + dhcp6opt_print(tp + 4, tp + optlen); + } + printf(")"); + break; + case DH6OPT_IA_PD_PREFIX: + if (optlen < 25) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + printf(" %s/%d", ip6addr_string(&tp[9]), tp[8]); + printf(" pltime:%u vltime:%u", + EXTRACT_32BITS(&tp[0]), + EXTRACT_32BITS(&tp[4])); + if (optlen > 25) { + /* there are sub-options */ + dhcp6opt_print(tp + 25, tp + optlen); + } + printf(")"); + break; + case DH6OPT_LIFETIME: + case DH6OPT_CLT_TIME: + if (optlen != 4) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + printf(" %d)", EXTRACT_32BITS(tp)); + break; + case DH6OPT_REMOTE_ID: + if (optlen < 4) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + printf(" %d ", EXTRACT_32BITS(tp)); + /* + * Print hex dump first 10 characters. + */ + for (i = 4; i < optlen && i < 14; i++) + printf("%02x", tp[i]); + printf("...)"); + break; + case DH6OPT_LQ_QUERY: + if (optlen < 17) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + switch (*tp) { + case 1: + printf(" by-address"); + break; + case 2: + printf(" by-clientID"); + break; + default: + printf(" type_%d", (int)*tp); + break; + } + printf(" %s", ip6addr_string(&tp[1])); + if (optlen > 17) { + /* there are query-options */ + dhcp6opt_print(tp + 17, tp + optlen); + } + printf(")"); + break; + case DH6OPT_CLIENT_DATA: + tp = (u_char *)(dh6o + 1); + if (optlen > 0) { + /* there are encapsulated options */ + dhcp6opt_print(tp, tp + optlen); + } + printf(")"); + break; + case DH6OPT_LQ_RELAY_DATA: + if (optlen < 16) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + printf(" %s ", ip6addr_string(&tp[0])); + /* + * Print hex dump first 10 characters. + */ + for (i = 16; i < optlen && i < 26; i++) + printf("%02x", tp[i]); + printf("...)"); + break; + case DH6OPT_NTP_SERVER: + if (optlen < 4) { + printf(" ?)"); + break; + } + tp = (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; + printf(" subopt:%d", subopt_code); + switch (subopt_code) { + case DH6OPT_NTP_SUBOPTION_SRV_ADDR: + case DH6OPT_NTP_SUBOPTION_MC_ADDR: + if (subopt_len != 16) { + printf(" ?"); + break; + } + printf(" %s", ip6addr_string(&tp[0])); + break; + case DH6OPT_NTP_SUBOPTION_SRV_FQDN: + putchar(' '); + if (ns_nprint(tp, tp + subopt_len) == NULL) + goto trunc; + break; + default: + printf(" ?"); + break; + } + tp += subopt_len; + } + printf(")"); + break; + case DH6OPT_AFTR_NAME: + if (optlen < 3) { + printf(" ?)"); + break; + } + tp = (u_char *)(dh6o + 1); + remain_len = optlen; + printf(" "); + /* Encoding is described in section 3.1 of RFC 1035 */ + while (remain_len && *tp) { + label_len = *tp++; + if (label_len < remain_len - 1) { + printf("%.*s", label_len, tp); + tp += label_len; + remain_len -= (label_len + 1); + if(*tp) printf("."); + } else { + printf(" ?"); + break; + } + } + printf(")"); + break; default: - printf(" (opt-%u)", ntohs(dh6o->dh6opt_type)); + printf(")"); break; } @@ -185,27 +809,69 @@ trunc: * Print dhcp6 packets */ void -dhcp6_print(register const u_char *cp, u_int length, - u_int16_t sport, u_int16_t dport) +dhcp6_print(const u_char *cp, u_int length) { struct dhcp6 *dh6; - u_char *ep; + struct dhcp6_relay *dh6relay; + const u_char *ep; u_char *extp; const char *name; printf("dhcp6"); ep = (u_char *)snapend; + if (cp + length < ep) + ep = cp + length; dh6 = (struct dhcp6 *)cp; - TCHECK(dh6->dh6_servaddr); + dh6relay = (struct dhcp6_relay *)cp; + TCHECK(dh6->dh6_xid); switch (dh6->dh6_msgtype) { + case DH6_SOLICIT: + name = "solicit"; + break; + case DH6_ADVERTISE: + name = "advertise"; + break; + case DH6_REQUEST: + name = "request"; + break; + case DH6_CONFIRM: + name = "confirm"; + break; + case DH6_RENEW: + name = "renew"; + break; + case DH6_REBIND: + name = "rebind"; + break; case DH6_REPLY: name = "reply"; break; + case DH6_RELEASE: + name = "release"; + break; + case DH6_DECLINE: + name = "decline"; + break; + case DH6_RECONFIGURE: + name = "reconfigure"; + break; case DH6_INFORM_REQ: name= "inf-req"; break; + case DH6_RELAY_FORW: + name= "relay-fwd"; + break; + case DH6_RELAY_REPLY: + name= "relay-reply"; + break; + case DH6_LEASEQUERY: + name= "leasequery"; + break; + case DH6_LQ_REPLY: + name= "leasequery-reply"; + break; default: name = NULL; break; @@ -214,8 +880,10 @@ dhcp6_print(register const u_char *cp, u_int length, if (!vflag) { if (name) printf(" %s", name); - else + else if (dh6->dh6_msgtype != DH6_RELAY_FORW && + dh6->dh6_msgtype != DH6_RELAY_REPLY) { printf(" msgtype-%u", dh6->dh6_msgtype); + } return; } @@ -225,10 +893,24 @@ dhcp6_print(register const u_char *cp, u_int length, 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); + if (dh6->dh6_msgtype != DH6_RELAY_FORW && + dh6->dh6_msgtype != DH6_RELAY_REPLY) { + printf("xid=%x", EXTRACT_32BITS(&dh6->dh6_xid) & DH6_XIDMASK); + extp = (u_char *)(dh6 + 1); + dhcp6opt_print(extp, ep); + } else { /* relay messages */ + struct in6_addr addr6; + + TCHECK(dh6relay->dh6relay_peeraddr); + + memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6)); + printf("linkaddr=%s", ip6addr_string(&addr6)); + + memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6)); + printf(" peeraddr=%s", ip6addr_string(&addr6)); + + dhcp6opt_print((u_char *)(dh6relay + 1), ep); + } /*(*/ printf(")"); return;