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-rw-r--r--print-dhcp6.c853
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diff --git a/print-dhcp6.c b/print-dhcp6.c
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--- /dev/null
+++ b/print-dhcp6.c
@@ -0,0 +1,853 @@
+/*
+ * 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:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 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
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * 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:
+ * RFC3319: Session Initiation Protocol (SIP) Servers options,
+ * RFC3633: IPv6 Prefix options,
+ * RFC3646: DNS Configuration options,
+ * RFC3898: Network Information Service (NIS) Configuration options,
+ * RFC4075: Simple Network Time Protocol (SNTP) Configuration option,
+ * RFC4242: Information Refresh Time option,
+ * RFC4280: Broadcast and Multicast Control Servers options,
+ * RFC5908: Network Time Protocol (NTP) Server Option for DHCPv6
+ * RFC6334: Dual-Stack Lite option,
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+/* lease duration */
+#define DHCP6_DURATION_INFINITE 0xffffffff
+
+/* Error Values */
+#define DH6ERR_FAILURE 16
+#define DH6ERR_AUTHFAIL 17
+#define DH6ERR_POORLYFORMED 18
+#define DH6ERR_UNAVAIL 19
+#define DH6ERR_OPTUNAVAIL 20
+
+/* Message type */
+#define DH6_SOLICIT 1
+#define DH6_ADVERTISE 2
+#define DH6_REQUEST 3
+#define DH6_CONFIRM 4
+#define DH6_RENEW 5
+#define DH6_REBIND 6
+#define DH6_REPLY 7
+#define DH6_RELEASE 8
+#define DH6_DECLINE 9
+#define DH6_RECONFIGURE 10
+#define DH6_INFORM_REQ 11
+#define DH6_RELAY_FORW 12
+#define DH6_RELAY_REPLY 13
+#define DH6_LEASEQUERY 14
+#define DH6_LQ_REPLY 15
+
+static const struct tok dh6_msgtype_str[] = {
+ { DH6_SOLICIT, "solicit" },
+ { DH6_ADVERTISE, "advertise" },
+ { DH6_REQUEST, "request" },
+ { DH6_CONFIRM, "confirm" },
+ { DH6_RENEW, "renew" },
+ { DH6_REBIND, "rebind" },
+ { DH6_REPLY, "reply" },
+ { DH6_RELEASE, "release" },
+ { DH6_DECLINE, "decline" },
+ { DH6_RECONFIGURE, "reconfigure" },
+ { DH6_INFORM_REQ, "inf-req" },
+ { DH6_RELAY_FORW, "relay-fwd" },
+ { DH6_RELAY_REPLY, "relay-reply" },
+ { DH6_LEASEQUERY, "leasequery" },
+ { DH6_LQ_REPLY, "leasequery-reply" },
+ { 0, NULL }
+};
+
+/* DHCP6 base packet format */
+struct dhcp6 {
+ union {
+ nd_uint8_t msgtype;
+ nd_uint32_t xid;
+ } dh6_msgtypexid;
+ /* options follow */
+};
+#define DH6_XIDMASK 0x00ffffff
+
+/* 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_NA 3
+#define DH6OPT_IA_TA 4
+#define DH6OPT_IA_ADDR 5
+#define DH6OPT_ORO 6
+#define DH6OPT_PREFERENCE 7
+# define DH6OPT_PREF_MAX 255
+#define DH6OPT_ELAPSED_TIME 8
+#define DH6OPT_RELAY_MSG 9
+/*#define DH6OPT_SERVER_MSG 10 deprecated */
+#define DH6OPT_AUTH 11
+# define DH6OPT_AUTHPROTO_DELAYED 2
+# define DH6OPT_AUTHPROTO_RECONFIG 3
+# define DH6OPT_AUTHALG_HMACMD5 1
+# define DH6OPT_AUTHRDM_MONOCOUNTER 0
+# define DH6OPT_AUTHRECONFIG_KEY 1
+# define DH6OPT_AUTHRECONFIG_HMACMD5 2
+#define DH6OPT_UNICAST 12
+#define DH6OPT_STATUS_CODE 13
+# define DH6OPT_STCODE_SUCCESS 0
+# define DH6OPT_STCODE_UNSPECFAIL 1
+# define DH6OPT_STCODE_NOADDRAVAIL 2
+# define DH6OPT_STCODE_NOBINDING 3
+# define DH6OPT_STCODE_NOTONLINK 4
+# define DH6OPT_STCODE_USEMULTICAST 5
+# define DH6OPT_STCODE_NOPREFIXAVAIL 6
+# define DH6OPT_STCODE_UNKNOWNQUERYTYPE 7
+# define DH6OPT_STCODE_MALFORMEDQUERY 8
+# define DH6OPT_STCODE_NOTCONFIGURED 9
+# define DH6OPT_STCODE_NOTALLOWED 10
+#define DH6OPT_RAPID_COMMIT 14
+#define DH6OPT_USER_CLASS 15
+#define DH6OPT_VENDOR_CLASS 16
+#define DH6OPT_VENDOR_OPTS 17
+#define DH6OPT_INTERFACE_ID 18
+#define DH6OPT_RECONF_MSG 19
+#define DH6OPT_RECONF_ACCEPT 20
+#define DH6OPT_SIP_SERVER_D 21
+#define DH6OPT_SIP_SERVER_A 22
+#define DH6OPT_DNS_SERVERS 23
+#define DH6OPT_DOMAIN_LIST 24
+#define DH6OPT_IA_PD 25
+#define DH6OPT_IA_PD_PREFIX 26
+#define DH6OPT_NIS_SERVERS 27
+#define DH6OPT_NISP_SERVERS 28
+#define DH6OPT_NIS_NAME 29
+#define DH6OPT_NISP_NAME 30
+#define DH6OPT_SNTP_SERVERS 31
+#define DH6OPT_LIFETIME 32
+#define DH6OPT_BCMCS_SERVER_D 33
+#define DH6OPT_BCMCS_SERVER_A 34
+#define DH6OPT_GEOCONF_CIVIC 36
+#define DH6OPT_REMOTE_ID 37
+#define DH6OPT_SUBSCRIBER_ID 38
+#define DH6OPT_CLIENT_FQDN 39
+#define DH6OPT_PANA_AGENT 40
+#define DH6OPT_NEW_POSIX_TIMEZONE 41
+#define DH6OPT_NEW_TZDB_TIMEZONE 42
+#define DH6OPT_ERO 43
+#define DH6OPT_LQ_QUERY 44
+#define DH6OPT_CLIENT_DATA 45
+#define DH6OPT_CLT_TIME 46
+#define DH6OPT_LQ_RELAY_DATA 47
+#define DH6OPT_LQ_CLIENT_LINK 48
+#define DH6OPT_NTP_SERVER 56
+# define DH6OPT_NTP_SUBOPTION_SRV_ADDR 1
+# define DH6OPT_NTP_SUBOPTION_MC_ADDR 2
+# define DH6OPT_NTP_SUBOPTION_SRV_FQDN 3
+#define DH6OPT_AFTR_NAME 64
+#define DH6OPT_MUDURL 112
+
+static const struct tok dh6opt_str[] = {
+ { DH6OPT_CLIENTID, "client-ID" },
+ { DH6OPT_SERVERID, "server-ID" },
+ { DH6OPT_IA_NA, "IA_NA" },
+ { DH6OPT_IA_TA, "IA_TA" },
+ { DH6OPT_IA_ADDR, "IA_ADDR" },
+ { DH6OPT_ORO, "option-request" },
+ { DH6OPT_PREFERENCE, "preference" },
+ { DH6OPT_ELAPSED_TIME, "elapsed-time" },
+ { DH6OPT_RELAY_MSG, "relay-message" },
+ { DH6OPT_AUTH, "authentication" },
+ { DH6OPT_UNICAST, "server-unicast" },
+ { DH6OPT_STATUS_CODE, "status-code" },
+ { DH6OPT_RAPID_COMMIT, "rapid-commit" },
+ { DH6OPT_USER_CLASS, "user-class" },
+ { DH6OPT_VENDOR_CLASS, "vendor-class" },
+ { DH6OPT_VENDOR_OPTS, "vendor-specific-info" },
+ { DH6OPT_INTERFACE_ID, "interface-ID" },
+ { DH6OPT_RECONF_MSG, "reconfigure-message" },
+ { DH6OPT_RECONF_ACCEPT, "reconfigure-accept" },
+ { DH6OPT_SIP_SERVER_D, "SIP-servers-domain" },
+ { DH6OPT_SIP_SERVER_A, "SIP-servers-address" },
+ { DH6OPT_DNS_SERVERS, "DNS-server" },
+ { DH6OPT_DOMAIN_LIST, "DNS-search-list" },
+ { DH6OPT_IA_PD, "IA_PD" },
+ { DH6OPT_IA_PD_PREFIX, "IA_PD-prefix" },
+ { DH6OPT_SNTP_SERVERS, "SNTP-servers" },
+ { DH6OPT_LIFETIME, "lifetime" },
+ { DH6OPT_NIS_SERVERS, "NIS-server" },
+ { DH6OPT_NISP_SERVERS, "NIS+-server" },
+ { DH6OPT_NIS_NAME, "NIS-domain-name" },
+ { DH6OPT_NISP_NAME, "NIS+-domain-name" },
+ { DH6OPT_BCMCS_SERVER_D, "BCMCS-domain-name" },
+ { DH6OPT_BCMCS_SERVER_A, "BCMCS-server" },
+ { DH6OPT_GEOCONF_CIVIC, "Geoconf-Civic" },
+ { DH6OPT_REMOTE_ID, "Remote-ID" },
+ { DH6OPT_SUBSCRIBER_ID, "Subscriber-ID" },
+ { DH6OPT_CLIENT_FQDN, "Client-FQDN" },
+ { DH6OPT_PANA_AGENT, "PANA-agent" },
+ { DH6OPT_NEW_POSIX_TIMEZONE, "POSIX-timezone" },
+ { DH6OPT_NEW_TZDB_TIMEZONE, "POSIX-tz-database" },
+ { DH6OPT_ERO, "Echo-request-option" },
+ { DH6OPT_LQ_QUERY, "Lease-query" },
+ { DH6OPT_CLIENT_DATA, "LQ-client-data" },
+ { DH6OPT_CLT_TIME, "Clt-time" },
+ { DH6OPT_LQ_RELAY_DATA, "LQ-relay-data" },
+ { DH6OPT_LQ_CLIENT_LINK, "LQ-client-link" },
+ { DH6OPT_NTP_SERVER, "NTP-server" },
+ { DH6OPT_AFTR_NAME, "AFTR-Name" },
+ { DH6OPT_MUDURL, "MUD-URL" },
+ { 0, NULL }
+};
+
+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 {
+ nd_uint16_t dh6opt_type;
+ nd_uint16_t dh6opt_len;
+ /* type-dependent data follows */
+};
+
+static const char *
+dhcp6stcode(const uint16_t code)
+{
+ return code > 255 ? "INVALID code" : tok2str(dh6opt_stcode_str, "code%u", code);
+}
+
+static void
+dhcp6opt_print(netdissect_options *ndo,
+ const u_char *cp, const u_char *ep)
+{
+ 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))
+ goto trunc;
+ 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 = 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) {
+ /*(*/
+ ND_PRINT(" ?)");
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ switch (GET_BE_U_2(tp)) {
+ case 1:
+ if (optlen >= 2 + 6) {
+ 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++)
+ ND_PRINT("%02x",
+ GET_U_1(tp + i));
+ /*(*/
+ ND_PRINT(")");
+ } else {
+ /*(*/
+ ND_PRINT(" ?)");
+ }
+ break;
+ case 2:
+ if (optlen >= 2 + 8) {
+ ND_PRINT(" vid ");
+ for (i = 2; i < 2 + 8; i++)
+ ND_PRINT("%02x",
+ GET_U_1(tp + i));
+ /*(*/
+ ND_PRINT(")");
+ } else {
+ /*(*/
+ ND_PRINT(" ?)");
+ }
+ break;
+ case 3:
+ if (optlen >= 2 + 2) {
+ ND_PRINT(" hwaddr type %u ",
+ GET_BE_U_2(tp + 2));
+ for (i = 4; i < optlen; i++)
+ ND_PRINT("%02x",
+ GET_U_1(tp + i));
+ /*(*/
+ ND_PRINT(")");
+ } else {
+ /*(*/
+ ND_PRINT(" ?)");
+ }
+ break;
+ default:
+ 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) {
+ ND_PRINT(" ?)");
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ for (i = 0; i < optlen; i += 2) {
+ ND_PRINT(" %s",
+ tok2str(dh6opt_str, "opt_%u", GET_BE_U_2(tp + i)));
+ }
+ ND_PRINT(")");
+ break;
+ case DH6OPT_PREFERENCE:
+ if (optlen != 1) {
+ 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;
+ }
+ 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 */
+ ND_PRINT(")");
+ 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(" ");
+ 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) {
+ ND_PRINT(" ?)");
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ for (i = 0; i < optlen; i += 16)
+ ND_PRINT(" %s", GET_IP6ADDR_STRING(tp + i));
+ ND_PRINT(")");
+ break;
+ 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) {
+ 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:
+ ND_PRINT(")");
+ break;
+ }
+
+ cp += sizeof(*dh6o) + optlen;
+ }
+ return;
+
+trunc:
+ nd_print_trunc(ndo);
+}
+
+/*
+ * Print dhcp6 packets
+ */
+void
+dhcp6_print(netdissect_options *ndo,
+ const u_char *cp, u_int length)
+{
+ const struct dhcp6 *dh6;
+ const struct dhcp6_relay *dh6relay;
+ uint8_t msgtype;
+ const u_char *ep;
+ const u_char *extp;
+ const char *name;
+
+ 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 (!ndo->ndo_vflag) {
+ ND_PRINT(" %s", name);
+ return;
+ }
+
+ /* XXX relay agent messages have to be handled differently */
+
+ 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);
+ }
+ /*(*/
+ ND_PRINT(")");
+ return;
+
+trunc:
+ nd_print_trunc(ndo);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-27 01:10:13 +0000