X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/3d932490b826facb568937a1290910a1265267f5..c39d40a767a1ae36171e5bcbf6f157ff3e80fb6c:/print-dhcp6.c diff --git a/print-dhcp6.c b/print-dhcp6.c index 516973e1..6b0dc213 100644 --- a/print-dhcp6.c +++ b/print-dhcp6.c @@ -26,29 +26,35 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ + +/* \summary: IPv6 DHCP printer */ + /* - * draft-ietf-dhc-dhcpv6-26.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 1.21 2002-08-01 08:53:04 risso Exp $"; -#endif - #ifdef HAVE_CONFIG_H -#include "config.h" +#include #endif -#include +#include "netdissect-stdinc.h" -#include -#include - -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" +#include "extract.h" /* lease duration */ -#define DHCP6_DURATITION_INFINITE 0xffffffff +#define DHCP6_DURATION_INFINITE 0xffffffff /* Error Values */ #define DH6ERR_FAILURE 16 @@ -65,274 +71,721 @@ static const char rcsid[] = #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; + nd_uint8_t msgtype; + nd_uint32_t xid; } dh6_msgtypexid; /* options follow */ -} __attribute__ ((__packed__)); -#define dh6_msgtype dh6_msgtypexid.m -#define dh6_xid dh6_msgtypexid.x +}; #define DH6_XIDMASK 0x00ffffff -/* option */ +/* 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 3 -#define DH6OPT_IA_TMP 4 -#define DH6OPT_IADDR 5 +#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_UNDEF -1 # define DH6OPT_PREF_MAX 255 #define DH6OPT_ELAPSED_TIME 8 -#define DH6OPT_CLIENT_MSG 9 -#define DH6OPT_SERVER_MSG 10 +#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_AUTHFAILED 2 -# define DH6OPT_STCODE_ADDRUNAVAIL 3 -# define DH6OPT_STCODE_NOADDRAVAIL 4 -# define DH6OPT_STCODE_NOBINDING 5 -# define DH6OPT_STCODE_CONFNOMATCH 6 -# define DH6OPT_STCODE_NOTONLINK 7 -# define DH6OPT_STCODE_USEMULTICAST 8 +# 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 -/* - * The option type has not been assigned for the following options. - * We temporarily adopt values used in the service specification document - * (200206xx version) by NTT Communications. - * Note that we'll change the following definitions if different type values - * are officially assigned. - */ -#define DH6OPT_DNS 25 -#define DH6OPT_PREFIX_DELEGATION 30 -#define DH6OPT_PREFIX_INFORMATION 31 -#define DH6OPT_PREFIX_REQUEST 32 +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 { - u_int16_t dh6opt_type; - u_int16_t dh6opt_len; + nd_uint16_t dh6opt_type; + nd_uint16_t dh6opt_len; /* type-dependent data follows */ -} __attribute__ ((__packed__)); - -static 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_ORO: - return "option request"; - case DH6OPT_PREFERENCE: - return "preference"; - case DH6OPT_STATUS_CODE: - return "status code"; - case DH6OPT_RAPID_COMMIT: - return "rapid commit"; - case DH6OPT_DNS: - return "DNS"; - case DH6OPT_PREFIX_DELEGATION: - return "prefix delegation"; - case DH6OPT_PREFIX_INFORMATION: - return "prefix information"; - default: - sprintf(genstr, "opt_%d", type); - return(genstr); - } -} +}; -static char * -dhcp6stcode(int code) +static const char * +dhcp6stcode(const uint16_t 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_AUTHFAILED: - return "auth fail"; - case DH6OPT_STCODE_ADDRUNAVAIL: - return "address unavailable"; - case DH6OPT_STCODE_NOADDRAVAIL: - return "no addresses"; - case DH6OPT_STCODE_NOBINDING: - return "no binding"; - case DH6OPT_STCODE_CONFNOMATCH: - return "confirm no match"; - case DH6OPT_STCODE_NOTONLINK: - return "not on-link"; - case DH6OPT_STCODE_USEMULTICAST: - return "use multicast"; - default: - sprintf(genstr, "code%d", code); - return(genstr); - } + 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, opttype; - size_t optlen; - u_int16_t val16; - u_int32_t val32; - struct in6_addr addr6; + 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)) + 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_SIZE(dh6o); + optlen = GET_BE_U_2(dh6o->dh6opt_len); + if (ep < cp + sizeof(*dh6o) + optlen) goto trunc; - opttype = ntohs(dh6o->dh6opt_type); - printf(" (%s", dhcp6opt_name(opttype)); + 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) { /*(*/ - printf(" ?)"); + ND_PRINT(" ?)"); break; } - tp = (u_char *)(dh6o + 1); - switch (ntohs(*(u_int16_t *)tp)) { + tp = (const u_char *)(dh6o + 1); + switch (GET_BE_U_2(tp)) { case 1: if (optlen >= 2 + 6) { - printf(" hwaddr/time type %u time %u ", - ntohs(*(u_int16_t *)&tp[2]), - ntohl(*(u_int32_t *)&tp[4])); + 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++) - printf("%02x", tp[i]); + ND_PRINT("%02x", + GET_U_1(tp + i)); /*(*/ - printf(")"); + ND_PRINT(")"); } else { /*(*/ - printf(" ?)"); + ND_PRINT(" ?)"); } break; case 2: if (optlen >= 2 + 8) { - printf(" vid "); + ND_PRINT(" vid "); for (i = 2; i < 2 + 8; i++) - printf("%02x", tp[i]); + ND_PRINT("%02x", + GET_U_1(tp + i)); /*(*/ - printf(")"); + ND_PRINT(")"); } else { /*(*/ - printf(" ?)"); + ND_PRINT(" ?)"); } break; case 3: if (optlen >= 2 + 2) { - printf(" hwaddr type %u ", - ntohs(*(u_int16_t *)&tp[2])); + ND_PRINT(" hwaddr type %u ", + GET_BE_U_2(tp + 2)); for (i = 4; i < optlen; i++) - printf("%02x", tp[i]); + ND_PRINT("%02x", + GET_U_1(tp + i)); /*(*/ - printf(")"); + ND_PRINT(")"); } else { /*(*/ - printf(" ?)"); + ND_PRINT(" ?)"); } break; default: - printf(" type %d)", ntohs(*(u_int16_t *)tp)); + 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) { - printf(" ?)"); + ND_PRINT(" ?)"); break; } - tp = (u_char *)(dh6o + 1); + tp = (const u_char *)(dh6o + 1); for (i = 0; i < optlen; i += 2) { - u_int16_t opt; - - memcpy(&opt, &tp[i], sizeof(opt)); - printf(" %s", dhcp6opt_name(ntohs(opt))); + ND_PRINT(" %s", + tok2str(dh6opt_str, "opt_%u", GET_BE_U_2(tp + i))); } - printf(")"); + ND_PRINT(")"); break; case DH6OPT_PREFERENCE: if (optlen != 1) { - printf(" ?)"); + 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; } - printf(" %d)", *((u_char *)(dh6o + 1) + 1)); + tp = (const u_char *)(dh6o + 1); + ND_PRINT(" %u)", GET_BE_U_2(tp)); + break; + case DH6OPT_RELAY_MSG: + { + const u_char *snapend_save; + + ND_PRINT(" ("); + tp = (const u_char *)(dh6o + 1); + /* + * Update the snapend to the end of the option before + * calling recursively dhcp6_print() for the nested + * packet. Other options may be present after the + * nested DHCPv6 packet. This prevents that, in + * dhcp6_print(), for the nested DHCPv6 packet, the + * remaining length < remaining caplen. + */ + snapend_save = ndo->ndo_snapend; + ndo->ndo_snapend = ND_MIN(tp + optlen, ndo->ndo_snapend); + dhcp6_print(ndo, tp, optlen); + ndo->ndo_snapend = snapend_save; + ND_PRINT(")"); + break; + } + case DH6OPT_AUTH: + if (optlen < 11) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + auth_proto = GET_U_1(tp); + switch (auth_proto) { + case DH6OPT_AUTHPROTO_DELAYED: + ND_PRINT(" proto: delayed"); + break; + case DH6OPT_AUTHPROTO_RECONFIG: + ND_PRINT(" proto: reconfigure"); + break; + default: + ND_PRINT(" proto: %u", auth_proto); + break; + } + tp++; + auth_alg = GET_U_1(tp); + switch (auth_alg) { + case DH6OPT_AUTHALG_HMACMD5: + /* XXX: may depend on the protocol */ + ND_PRINT(", alg: HMAC-MD5"); + break; + default: + ND_PRINT(", alg: %u", auth_alg); + break; + } + tp++; + auth_rdm = GET_U_1(tp); + switch (auth_rdm) { + case DH6OPT_AUTHRDM_MONOCOUNTER: + ND_PRINT(", RDM: mono"); + break; + default: + ND_PRINT(", RDM: %u", auth_rdm); + break; + } + tp++; + ND_PRINT(", RD:"); + for (i = 0; i < 4; i++, tp += 2) + ND_PRINT(" %04x", GET_BE_U_2(tp)); + + /* protocol dependent part */ + authinfolen = optlen - 11; + switch (auth_proto) { + case DH6OPT_AUTHPROTO_DELAYED: + if (authinfolen == 0) + break; + if (authinfolen < 20) { + ND_PRINT(" ??"); + break; + } + authrealmlen = authinfolen - 20; + if (authrealmlen > 0) { + ND_PRINT(", realm: "); + } + for (i = 0; i < authrealmlen; i++, tp++) + ND_PRINT("%02x", GET_U_1(tp)); + ND_PRINT(", key ID: %08x", GET_BE_U_4(tp)); + tp += 4; + ND_PRINT(", HMAC-MD5:"); + for (i = 0; i < 4; i++, tp+= 4) + ND_PRINT(" %08x", GET_BE_U_4(tp)); + break; + case DH6OPT_AUTHPROTO_RECONFIG: + if (authinfolen != 17) { + ND_PRINT(" ??"); + break; + } + switch (GET_U_1(tp)) { + case DH6OPT_AUTHRECONFIG_KEY: + ND_PRINT(" reconfig-key"); + break; + case DH6OPT_AUTHRECONFIG_HMACMD5: + ND_PRINT(" type: HMAC-MD5"); + break; + default: + ND_PRINT(" type: ??"); + break; + } + tp++; + ND_PRINT(" value:"); + for (i = 0; i < 4; i++, tp+= 4) + ND_PRINT(" %08x", GET_BE_U_4(tp)); + break; + default: + ND_PRINT(" ??"); + break; + } + + ND_PRINT(")"); break; case DH6OPT_RAPID_COMMIT: /* nothing todo */ - printf(")"); + ND_PRINT(")"); break; - case DH6OPT_DNS: + 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) { - printf(" ?)"); + ND_PRINT(" ?)"); 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(" %s", GET_IP6ADDR_STRING(tp + i)); + ND_PRINT(")"); break; - case DH6OPT_PREFIX_DELEGATION: - dhcp6opt_print((u_char *)(dh6o + 1), - (u_char *)(dh6o + 1) + optlen); - printf(")"); - break; - case DH6OPT_PREFIX_INFORMATION: - if (optlen % 21) - printf(" ?)"); - memcpy(&addr6, (u_char *)(dh6o + 1) + 5, - sizeof(addr6)); - printf(" %s/%d", ip6addr_string(&addr6), - (int)*((u_char *)(dh6o + 1) + 4)); - memcpy(&val32, dh6o + 1, sizeof(val32)); - val32 = ntohl(val32); - if (val32 == DHCP6_DURATITION_INFINITE) - printf(" lease-duration: infinite)"); - else - printf(" lease-duration: %u)", val32); + 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) - printf(" ?)"); - memcpy(&val16, (u_char *)(dh6o + 1), sizeof(val16)); - val16 = ntohs(val16); - printf(" %s)", dhcp6stcode(val16)); + if (optlen < 2) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT(" %s)", dhcp6stcode(GET_BE_U_2(tp))); + break; + case DH6OPT_IA_NA: + case DH6OPT_IA_PD: + if (optlen < 12) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT(" IAID:%u T1:%u T2:%u", + GET_BE_U_4(tp), + GET_BE_U_4(tp + 4), + GET_BE_U_4(tp + 8)); + if (optlen > 12) { + /* there are sub-options */ + dhcp6opt_print(ndo, tp + 12, tp + optlen); + } + ND_PRINT(")"); + break; + case DH6OPT_IA_TA: + if (optlen < 4) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT(" IAID:%u", GET_BE_U_4(tp)); + if (optlen > 4) { + /* there are sub-options */ + dhcp6opt_print(ndo, tp + 4, tp + optlen); + } + ND_PRINT(")"); + break; + case DH6OPT_IA_PD_PREFIX: + if (optlen < 25) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT(" %s/%u", GET_IP6ADDR_STRING(tp + 9), + GET_U_1(tp + 8)); + ND_PRINT(" pltime:%u vltime:%u", + GET_BE_U_4(tp), + GET_BE_U_4(tp + 4)); + if (optlen > 25) { + /* there are sub-options */ + dhcp6opt_print(ndo, tp + 25, tp + optlen); + } + ND_PRINT(")"); + break; + case DH6OPT_LIFETIME: + case DH6OPT_CLT_TIME: + if (optlen != 4) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT(" %u)", GET_BE_U_4(tp)); + break; + case DH6OPT_REMOTE_ID: + if (optlen < 4) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT(" %u ", GET_BE_U_4(tp)); + /* + * Print hex dump first 10 characters. + */ + for (i = 4; i < optlen && i < 14; i++) + ND_PRINT("%02x", GET_U_1(tp + i)); + ND_PRINT("...)"); + break; + case DH6OPT_LQ_QUERY: + if (optlen < 17) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + dh6_lq_query_type = GET_U_1(tp); + switch (dh6_lq_query_type) { + case 1: + ND_PRINT(" by-address"); + break; + case 2: + ND_PRINT(" by-clientID"); + break; + default: + ND_PRINT(" type_%u", dh6_lq_query_type); + break; + } + ND_PRINT(" %s", GET_IP6ADDR_STRING(tp + 1)); + if (optlen > 17) { + /* there are query-options */ + dhcp6opt_print(ndo, tp + 17, tp + optlen); + } + ND_PRINT(")"); + break; + case DH6OPT_CLIENT_DATA: + tp = (const u_char *)(dh6o + 1); + if (optlen > 0) { + /* there are encapsulated options */ + dhcp6opt_print(ndo, tp, tp + optlen); + } + ND_PRINT(")"); + break; + case DH6OPT_LQ_RELAY_DATA: + if (optlen < 16) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT(" %s ", GET_IP6ADDR_STRING(tp)); + /* + * Print hex dump first 10 characters. + */ + for (i = 16; i < optlen && i < 26; i++) + ND_PRINT("%02x", GET_U_1(tp + i)); + ND_PRINT("...)"); + break; + case DH6OPT_NTP_SERVER: + if (optlen < 4) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + while (tp < cp + sizeof(*dh6o) + optlen - 4) { + subopt_code = GET_BE_U_2(tp); + tp += 2; + subopt_len = GET_BE_U_2(tp); + tp += 2; + if (tp + subopt_len > cp + sizeof(*dh6o) + optlen) + goto trunc; + ND_PRINT(" subopt:%u", subopt_code); + switch (subopt_code) { + case DH6OPT_NTP_SUBOPTION_SRV_ADDR: + case DH6OPT_NTP_SUBOPTION_MC_ADDR: + if (subopt_len != 16) { + ND_PRINT(" ?"); + break; + } + ND_PRINT(" %s", GET_IP6ADDR_STRING(tp)); + break; + case DH6OPT_NTP_SUBOPTION_SRV_FQDN: + ND_PRINT(" "); + if (fqdn_print(ndo, tp, tp + subopt_len) == NULL) + goto trunc; + break; + default: + ND_PRINT(" ?"); + break; + } + tp += subopt_len; + } + ND_PRINT(")"); break; + case DH6OPT_AFTR_NAME: + if (optlen < 3) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + remain_len = optlen; + ND_PRINT(" "); + /* Encoding is described in section 3.1 of RFC 1035 */ + while (remain_len && GET_U_1(tp)) { + label_len = GET_U_1(tp); + tp++; + if (label_len < remain_len - 1) { + nd_printjnp(ndo, tp, label_len); + tp += label_len; + remain_len -= (label_len + 1); + if(GET_U_1(tp)) ND_PRINT("."); + } else { + ND_PRINT(" ?"); + break; + } + } + ND_PRINT(")"); + break; + case DH6OPT_NEW_POSIX_TIMEZONE: /* all three of these options */ + case DH6OPT_NEW_TZDB_TIMEZONE: /* are encoded similarly */ + case DH6OPT_MUDURL: /* although GMT might not work */ + if (optlen < 5) { + ND_PRINT(" ?)"); + break; + } + tp = (const u_char *)(dh6o + 1); + ND_PRINT(" "); + nd_printjnp(ndo, tp, optlen); + ND_PRINT(")"); + break; + default: - printf(")", ntohs(dh6o->dh6opt_type)); + ND_PRINT(")"); break; } @@ -341,78 +794,60 @@ dhcp6opt_print(u_char *cp, u_char *ep) return; trunc: - printf("[|dhcp6ext]"); + nd_print_trunc(ndo); } /* * 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; + uint8_t msgtype; + const u_char *ep; + const u_char *extp; const char *name; - printf("dhcp6"); - - ep = (u_char *)snapend; - - dh6 = (struct dhcp6 *)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_INFORM_REQ: - name= "inf-req"; - break; - default: - name = NULL; - break; - } + 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 (!vflag) { - if (name) - printf(" %s", name); - else - printf(" msgtype-%u", dh6->dh6_msgtype); + if (!ndo->ndo_vflag) { + ND_PRINT(" %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); - extp = (u_char *)(dh6 + 1); - dhcp6opt_print(extp, ep); + ND_PRINT(" %s (", name); /*)*/ + if (msgtype != DH6_RELAY_FORW && msgtype != DH6_RELAY_REPLY) { + ND_PRINT("xid=%x", + GET_BE_U_4(dh6->dh6_msgtypexid.xid) & DH6_XIDMASK); + extp = (const u_char *)(dh6 + 1); + dhcp6opt_print(ndo, extp, ep); + } else { /* relay messages */ + ND_PRINT("linkaddr=%s", GET_IP6ADDR_STRING(dh6relay->dh6relay_linkaddr)); + + ND_PRINT(" peeraddr=%s", GET_IP6ADDR_STRING(dh6relay->dh6relay_peeraddr)); + + dhcp6opt_print(ndo, (const u_char *)(dh6relay + 1), ep); + } /*(*/ - printf(")"); + ND_PRINT(")"); return; trunc: - printf("[|dhcp6]"); + nd_print_trunc(ndo); }