X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/a42db1cd0feab41d1acce910ebbb12cc1ba6de05..refs/heads/tcpdump-4.9:/print-dhcp6.c diff --git a/print-dhcp6.c b/print-dhcp6.c index 35de278d..cbb6d84a 100644 --- a/print-dhcp6.c +++ b/print-dhcp6.c @@ -26,9 +26,12 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ + +/* \summary: IPv6 DHCP printer */ + /* * RFC3315: DHCPv6 - * supported DHCPv6 options: + * supported DHCPv6 options: * RFC3319: Session Initiation Protocol (SIP) Servers options, * RFC3633: IPv6 Prefix options, * RFC3646: DNS Configuration options, @@ -36,29 +39,25 @@ * 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[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.37 2008-02-06 10:26:09 guy Exp $"; -#endif - #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include +#include #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 @@ -84,11 +83,30 @@ static const char rcsid[] _U_ = #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 m; + nd_uint32_t x; } dh6_msgtypexid; /* options follow */ }; @@ -98,10 +116,10 @@ struct dhcp6 { /* 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]; + 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 */ }; @@ -146,15 +164,15 @@ struct dhcp6_relay { #define DH6OPT_RECONF_ACCEPT 20 #define DH6OPT_SIP_SERVER_D 21 #define DH6OPT_SIP_SERVER_A 22 -#define DH6OPT_DNS 23 -#define DH6OPT_DNSNAME 24 +#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_NTP_SERVERS 31 +#define DH6OPT_SNTP_SERVERS 31 #define DH6OPT_LIFETIME 32 #define DH6OPT_BCMCS_SERVER_D 33 #define DH6OPT_BCMCS_SERVER_A 34 @@ -171,332 +189,269 @@ struct dhcp6_relay { #define DH6OPT_CLT_TIME 46 #define DH6OPT_LQ_RELAY_DATA 47 #define DH6OPT_LQ_CLIENT_LINK 48 +#define DH6OPT_NTP_SERVER 56 +# define DH6OPT_NTP_SUBOPTION_SRV_ADDR 1 +# define DH6OPT_NTP_SUBOPTION_MC_ADDR 2 +# define DH6OPT_NTP_SUBOPTION_SRV_FQDN 3 #define DH6OPT_AFTR_NAME 64 +#define DH6OPT_MUDURL 112 + +static const struct tok dh6opt_str[] = { + { DH6OPT_CLIENTID, "client-ID" }, + { DH6OPT_SERVERID, "server-ID" }, + { DH6OPT_IA_NA, "IA_NA" }, + { DH6OPT_IA_TA, "IA_TA" }, + { DH6OPT_IA_ADDR, "IA_ADDR" }, + { DH6OPT_ORO, "option-request" }, + { DH6OPT_PREFERENCE, "preference" }, + { DH6OPT_ELAPSED_TIME, "elapsed-time" }, + { DH6OPT_RELAY_MSG, "relay-message" }, + { DH6OPT_AUTH, "authentication" }, + { DH6OPT_UNICAST, "server-unicast" }, + { DH6OPT_STATUS_CODE, "status-code" }, + { DH6OPT_RAPID_COMMIT, "rapid-commit" }, + { DH6OPT_USER_CLASS, "user-class" }, + { DH6OPT_VENDOR_CLASS, "vendor-class" }, + { DH6OPT_VENDOR_OPTS, "vendor-specific-info" }, + { DH6OPT_INTERFACE_ID, "interface-ID" }, + { DH6OPT_RECONF_MSG, "reconfigure-message" }, + { DH6OPT_RECONF_ACCEPT, "reconfigure-accept" }, + { DH6OPT_SIP_SERVER_D, "SIP-servers-domain" }, + { DH6OPT_SIP_SERVER_A, "SIP-servers-address" }, + { DH6OPT_DNS_SERVERS, "DNS-server" }, + { DH6OPT_DOMAIN_LIST, "DNS-search-list" }, + { DH6OPT_IA_PD, "IA_PD" }, + { DH6OPT_IA_PD_PREFIX, "IA_PD-prefix" }, + { DH6OPT_SNTP_SERVERS, "SNTP-servers" }, + { DH6OPT_LIFETIME, "lifetime" }, + { DH6OPT_NIS_SERVERS, "NIS-server" }, + { DH6OPT_NISP_SERVERS, "NIS+-server" }, + { DH6OPT_NIS_NAME, "NIS-domain-name" }, + { DH6OPT_NISP_NAME, "NIS+-domain-name" }, + { DH6OPT_BCMCS_SERVER_D, "BCMCS-domain-name" }, + { DH6OPT_BCMCS_SERVER_A, "BCMCS-server" }, + { DH6OPT_GEOCONF_CIVIC, "Geoconf-Civic" }, + { DH6OPT_REMOTE_ID, "Remote-ID" }, + { DH6OPT_SUBSCRIBER_ID, "Subscriber-ID" }, + { DH6OPT_CLIENT_FQDN, "Client-FQDN" }, + { DH6OPT_PANA_AGENT, "PANA-agent" }, + { DH6OPT_NEW_POSIX_TIMEZONE, "POSIX-timezone" }, + { DH6OPT_NEW_TZDB_TIMEZONE, "POSIX-tz-database" }, + { DH6OPT_ERO, "Echo-request-option" }, + { DH6OPT_LQ_QUERY, "Lease-query" }, + { DH6OPT_CLIENT_DATA, "LQ-client-data" }, + { DH6OPT_CLT_TIME, "Clt-time" }, + { DH6OPT_LQ_RELAY_DATA, "LQ-relay-data" }, + { DH6OPT_LQ_CLIENT_LINK, "LQ-client-link" }, + { DH6OPT_NTP_SERVER, "NTP-server" }, + { DH6OPT_AFTR_NAME, "AFTR-Name" }, + { DH6OPT_MUDURL, "MUD-URL" }, + { 0, NULL } +}; + +static const struct tok dh6opt_stcode_str[] = { + { DH6OPT_STCODE_SUCCESS, "Success" }, /* RFC3315 */ + { DH6OPT_STCODE_UNSPECFAIL, "UnspecFail" }, /* RFC3315 */ + { DH6OPT_STCODE_NOADDRAVAIL, "NoAddrsAvail" }, /* RFC3315 */ + { DH6OPT_STCODE_NOBINDING, "NoBinding" }, /* RFC3315 */ + { DH6OPT_STCODE_NOTONLINK, "NotOnLink" }, /* RFC3315 */ + { DH6OPT_STCODE_USEMULTICAST, "UseMulticast" }, /* RFC3315 */ + { DH6OPT_STCODE_NOPREFIXAVAIL, "NoPrefixAvail" }, /* RFC3633 */ + { DH6OPT_STCODE_UNKNOWNQUERYTYPE, "UnknownQueryType" }, /* RFC5007 */ + { DH6OPT_STCODE_MALFORMEDQUERY, "MalformedQuery" }, /* RFC5007 */ + { DH6OPT_STCODE_NOTCONFIGURED, "NotConfigured" }, /* RFC5007 */ + { DH6OPT_STCODE_NOTALLOWED, "NotAllowed" }, /* RFC5007 */ + { 0, NULL } +}; struct dhcp6opt { - u_int16_t dh6opt_type; - u_int16_t dh6opt_len; + nd_uint16_t dh6opt_type; + nd_uint16_t dh6opt_len; /* type-dependent data follows */ }; static const char * -dhcp6opt_name(int type) +dhcp6stcode(const uint16_t code) { - 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: - return "DNS-server"; - case DH6OPT_DNSNAME: - return "DNS-search-list"; - case DH6OPT_IA_PD: - return "IA_PD"; - case DH6OPT_IA_PD_PREFIX: - return "IA_PD-prefix"; - case DH6OPT_NTP_SERVERS: - return "NTP-server"; - 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_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); - } + return code > 255 ? "INVALID code" : tok2str(dh6opt_stcode_str, "code%u", code); } static void -dhcp6opt_print(const u_char *cp, const u_char *ep) +dhcp6opt_print(netdissect_options *ndo, + const u_char *cp, const u_char *ep) { - struct dhcp6opt *dh6o; - u_char *tp; + const struct dhcp6opt *dh6o; + const u_char *tp; size_t i; - u_int16_t opttype; + uint16_t opttype; size_t optlen; - u_int8_t auth_proto; + 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)) goto trunc; - dh6o = (struct dhcp6opt *)cp; - TCHECK(*dh6o); + dh6o = (const struct dhcp6opt *)cp; + ND_TCHECK(*dh6o); optlen = EXTRACT_16BITS(&dh6o->dh6opt_len); if (ep < cp + sizeof(*dh6o) + optlen) goto trunc; opttype = EXTRACT_16BITS(&dh6o->dh6opt_type); - printf(" (%s", dhcp6opt_name(opttype)); + 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) { /*(*/ - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); + tp = (const u_char *)(dh6o + 1); switch (EXTRACT_16BITS(tp)) { case 1: if (optlen >= 2 + 6) { - printf(" hwaddr/time type %u time %u ", + ND_PRINT((ndo, " hwaddr/time type %u time %u ", EXTRACT_16BITS(&tp[2]), - EXTRACT_32BITS(&tp[4])); + 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 ", - EXTRACT_16BITS(&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: - printf(" type %d)", EXTRACT_16BITS(tp)); + ND_PRINT((ndo, " type %d)", EXTRACT_16BITS(tp))); break; } break; case DH6OPT_IA_ADDR: if (optlen < 24) { /*(*/ - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - printf(" %s", ip6addr_string(&tp[0])); - printf(" pltime:%u vltime:%u", + 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])); + EXTRACT_32BITS(&tp[20]))); if (optlen > 24) { /* there are sub-options */ - dhcp6opt_print(tp + 24, tp + optlen); + dhcp6opt_print(ndo, tp + 24, tp + optlen); } - printf(")"); + ND_PRINT((ndo, ")")); break; case DH6OPT_ORO: case DH6OPT_ERO: if (optlen % 2) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); + tp = (const u_char *)(dh6o + 1); for (i = 0; i < optlen; i += 2) { - printf(" %s", - dhcp6opt_name(EXTRACT_16BITS(&tp[i]))); + ND_PRINT((ndo, " %s", + tok2str(dh6opt_str, "opt_%u", EXTRACT_16BITS(&tp[i])))); } - printf(")"); + ND_PRINT((ndo, ")")); break; case DH6OPT_PREFERENCE: if (optlen != 1) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - printf(" %d)", *tp); + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %d)", *tp)); break; case DH6OPT_ELAPSED_TIME: if (optlen != 2) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - printf(" %d)", EXTRACT_16BITS(tp)); + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %d)", EXTRACT_16BITS(tp))); break; case DH6OPT_RELAY_MSG: - printf(" ("); - tp = (u_char *)(dh6o + 1); - dhcp6_print(tp, optlen); - printf(")"); + ND_PRINT((ndo, " (")); + tp = (const u_char *)(dh6o + 1); + dhcp6_print(ndo, tp, optlen); + ND_PRINT((ndo, ")")); break; case DH6OPT_AUTH: if (optlen < 11) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); + tp = (const u_char *)(dh6o + 1); auth_proto = *tp; switch (auth_proto) { case DH6OPT_AUTHPROTO_DELAYED: - printf(" proto: delayed"); + ND_PRINT((ndo, " proto: delayed")); break; case DH6OPT_AUTHPROTO_RECONFIG: - printf(" proto: reconfigure"); + ND_PRINT((ndo, " proto: reconfigure")); break; default: - printf(" proto: %d", auth_proto); + ND_PRINT((ndo, " proto: %d", auth_proto)); break; } tp++; switch (*tp) { case DH6OPT_AUTHALG_HMACMD5: /* XXX: may depend on the protocol */ - printf(", alg: HMAC-MD5"); + ND_PRINT((ndo, ", alg: HMAC-MD5")); break; default: - printf(", alg: %d", *tp); + ND_PRINT((ndo, ", alg: %d", *tp)); break; } tp++; switch (*tp) { case DH6OPT_AUTHRDM_MONOCOUNTER: - printf(", RDM: mono"); + ND_PRINT((ndo, ", RDM: mono")); break; default: - printf(", RDM: %d", *tp); + ND_PRINT((ndo, ", RDM: %d", *tp)); break; } tp++; - printf(", RD:"); + ND_PRINT((ndo, ", RD:")); for (i = 0; i < 4; i++, tp += 2) - printf(" %04x", EXTRACT_16BITS(tp)); + ND_PRINT((ndo, " %04x", EXTRACT_16BITS(tp))); /* protocol dependent part */ authinfolen = optlen - 11; @@ -505,50 +460,50 @@ dhcp6opt_print(const u_char *cp, const u_char *ep) if (authinfolen == 0) break; if (authinfolen < 20) { - printf(" ??"); + ND_PRINT((ndo, " ??")); break; } authrealmlen = authinfolen - 20; if (authrealmlen > 0) { - printf(", realm: "); + ND_PRINT((ndo, ", realm: ")); } for (i = 0; i < authrealmlen; i++, tp++) - printf("%02x", *tp); - printf(", key ID: %08x", EXTRACT_32BITS(tp)); + ND_PRINT((ndo, "%02x", *tp)); + ND_PRINT((ndo, ", key ID: %08x", EXTRACT_32BITS(tp))); tp += 4; - printf(", HMAC-MD5:"); + ND_PRINT((ndo, ", HMAC-MD5:")); for (i = 0; i < 4; i++, tp+= 4) - printf(" %08x", EXTRACT_32BITS(tp)); + ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tp))); break; case DH6OPT_AUTHPROTO_RECONFIG: if (authinfolen != 17) { - printf(" ??"); + ND_PRINT((ndo, " ??")); break; } switch (*tp++) { case DH6OPT_AUTHRECONFIG_KEY: - printf(" reconfig-key"); + ND_PRINT((ndo, " reconfig-key")); break; case DH6OPT_AUTHRECONFIG_HMACMD5: - printf(" type: HMAC-MD5"); + ND_PRINT((ndo, " type: HMAC-MD5")); break; default: - printf(" type: ??"); + ND_PRINT((ndo, " type: ??")); break; } - printf(" value:"); + ND_PRINT((ndo, " value:")); for (i = 0; i < 4; i++, tp+= 4) - printf(" %08x", EXTRACT_32BITS(tp)); + ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tp))); break; default: - printf(" ??"); + ND_PRINT((ndo, " ??")); break; } - printf(")"); + ND_PRINT((ndo, ")")); break; case DH6OPT_RAPID_COMMIT: /* nothing todo */ - printf(")"); + ND_PRINT((ndo, ")")); break; case DH6OPT_INTERFACE_ID: case DH6OPT_SUBSCRIBER_ID: @@ -556,194 +511,257 @@ dhcp6opt_print(const u_char *cp, const u_char *ep) * Since we cannot predict the encoding, print hex dump * at most 10 characters. */ - tp = (u_char *)(dh6o + 1); - printf(" "); + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " ")); for (i = 0; i < optlen && i < 10; i++) - printf("%02x", tp[i]); - printf("...)"); + ND_PRINT((ndo, "%02x", tp[i])); + ND_PRINT((ndo, "...)")); break; case DH6OPT_RECONF_MSG: - tp = (u_char *)(dh6o + 1); + if (optlen != 1) { + ND_PRINT((ndo, " ?)")); + break; + } + tp = (const u_char *)(dh6o + 1); switch (*tp) { case DH6_RENEW: - printf(" for renew)"); + ND_PRINT((ndo, " for renew)")); break; case DH6_INFORM_REQ: - printf(" for inf-req)"); + ND_PRINT((ndo, " for inf-req)")); break; default: - printf(" for ?\?\?(%02x))", *tp); + ND_PRINT((ndo, " for ?\?\?(%02x))", *tp)); break; } break; case DH6OPT_RECONF_ACCEPT: /* nothing todo */ - printf(")"); + ND_PRINT((ndo, ")")); break; case DH6OPT_SIP_SERVER_A: - case DH6OPT_DNS: - case DH6OPT_NTP_SERVERS: + 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((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) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - printf(" %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0]))); + 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) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - printf(" IAID:%u T1:%u T2:%u", + 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])); + EXTRACT_32BITS(&tp[8]))); if (optlen > 12) { /* there are sub-options */ - dhcp6opt_print(tp + 12, tp + optlen); + dhcp6opt_print(ndo, tp + 12, tp + optlen); } - printf(")"); + ND_PRINT((ndo, ")")); break; case DH6OPT_IA_TA: if (optlen < 4) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - printf(" IAID:%u", EXTRACT_32BITS(tp)); + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " IAID:%u", EXTRACT_32BITS(tp))); if (optlen > 4) { /* there are sub-options */ - dhcp6opt_print(tp + 4, tp + optlen); + dhcp6opt_print(ndo, tp + 4, tp + optlen); } - printf(")"); + ND_PRINT((ndo, ")")); break; case DH6OPT_IA_PD_PREFIX: if (optlen < 25) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - printf(" %s/%d", ip6addr_string(&tp[9]), tp[8]); - printf(" pltime:%u vltime:%u", + 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])); + EXTRACT_32BITS(&tp[4]))); if (optlen > 25) { /* there are sub-options */ - dhcp6opt_print(tp + 25, tp + optlen); + dhcp6opt_print(ndo, tp + 25, tp + optlen); } - printf(")"); + ND_PRINT((ndo, ")")); break; case DH6OPT_LIFETIME: case DH6OPT_CLT_TIME: if (optlen != 4) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - printf(" %d)", EXTRACT_32BITS(tp)); + tp = (const u_char *)(dh6o + 1); + ND_PRINT((ndo, " %d)", EXTRACT_32BITS(tp))); break; case DH6OPT_REMOTE_ID: if (optlen < 4) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - printf(" %d ", EXTRACT_32BITS(tp)); + 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++) - printf("%02x", tp[i]); - printf("...)"); + ND_PRINT((ndo, "%02x", tp[i])); + ND_PRINT((ndo, "...)")); break; case DH6OPT_LQ_QUERY: if (optlen < 17) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); + tp = (const u_char *)(dh6o + 1); switch (*tp) { case 1: - printf(" by-address"); + ND_PRINT((ndo, " by-address")); break; case 2: - printf(" by-clientID"); + ND_PRINT((ndo, " by-clientID")); break; default: - printf(" type_%d", (int)*tp); + ND_PRINT((ndo, " type_%d", (int)*tp)); break; } - printf(" %s", ip6addr_string(&tp[1])); + ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[1]))); if (optlen > 17) { /* there are query-options */ - dhcp6opt_print(tp + 17, tp + optlen); + dhcp6opt_print(ndo, tp + 17, tp + optlen); } - printf(")"); + ND_PRINT((ndo, ")")); break; case DH6OPT_CLIENT_DATA: - tp = (u_char *)(dh6o + 1); + tp = (const u_char *)(dh6o + 1); if (optlen > 0) { /* there are encapsulated options */ - dhcp6opt_print(tp, tp + optlen); + dhcp6opt_print(ndo, tp, tp + optlen); } - printf(")"); + ND_PRINT((ndo, ")")); break; case DH6OPT_LQ_RELAY_DATA: if (optlen < 16) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); - printf(" %s ", ip6addr_string(&tp[0])); + 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++) - printf("%02x", tp[i]); - printf("...)"); + 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) { - printf(" ?)"); + ND_PRINT((ndo, " ?)")); break; } - tp = (u_char *)(dh6o + 1); + tp = (const u_char *)(dh6o + 1); remain_len = optlen; - printf(" "); + 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) { - printf("%.*s", label_len, tp); + (void)fn_printn(ndo, tp, label_len, NULL); tp += label_len; remain_len -= (label_len + 1); - if(*tp) printf("."); + if(*tp) ND_PRINT((ndo, ".")); } else { - printf(" ?"); + ND_PRINT((ndo, " ?")); break; } } - printf(")"); + 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: - printf(")"); + ND_PRINT((ndo, ")")); break; } @@ -752,119 +770,63 @@ dhcp6opt_print(const u_char *cp, const u_char *ep) return; trunc: - printf("[|dhcp6ext]"); + ND_PRINT((ndo, "[|dhcp6ext]")); } /* * Print dhcp6 packets */ void -dhcp6_print(const u_char *cp, u_int length) +dhcp6_print(netdissect_options *ndo, + const u_char *cp, u_int length) { - struct dhcp6 *dh6; - struct dhcp6_relay *dh6relay; + const struct dhcp6 *dh6; + const struct dhcp6_relay *dh6relay; const u_char *ep; - u_char *extp; + 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 = (struct dhcp6 *)cp; - 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; - } + 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 (!vflag) { - if (name) - printf(" %s", name); - else if (dh6->dh6_msgtype != DH6_RELAY_FORW && - dh6->dh6_msgtype != DH6_RELAY_REPLY) { - printf(" 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); /*)*/ + ND_PRINT((ndo, " %s (", name)); /*)*/ 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); + 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; - TCHECK(dh6relay->dh6relay_peeraddr); + ND_TCHECK(dh6relay->dh6relay_peeraddr); memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6)); - printf("linkaddr=%s", ip6addr_string(&addr6)); + ND_PRINT((ndo, "linkaddr=%s", ip6addr_string(ndo, &addr6))); memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6)); - printf(" peeraddr=%s", ip6addr_string(&addr6)); + ND_PRINT((ndo, " peeraddr=%s", ip6addr_string(ndo, &addr6))); - dhcp6opt_print((u_char *)(dh6relay + 1), ep); + dhcp6opt_print(ndo, (const u_char *)(dh6relay + 1), ep); } /*(*/ - printf(")"); + ND_PRINT((ndo, ")")); return; trunc: - printf("[|dhcp6]"); + ND_PRINT((ndo, "[|dhcp6]")); }