/*
* 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:
* 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
* SUCH DAMAGE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.13 2001-01-28 09:49:49 itojun Exp $";
-#endif
+/* \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 <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
+#include <netdissect-stdinc.h>
-struct mbuf;
-struct rtentry;
-
-#include <netinet/in.h>
-
-#include <ctype.h>
#include <stdio.h>
#include <string.h>
-#include <arpa/inet.h>
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
-#include "dhcp6.h"
-#include "dhcp6opt.h"
-
-#if 0
-static void dhcp6opttab_init(void);
-static struct dhcp6_opt *dhcp6opttab_byname(char *);
-#endif
-static struct dhcp6_opt *dhcp6opttab_bycode(u_int);
-
-static char tstr[] = " [|dhcp6]";
-
-static struct dhcp6_opt dh6opttab[] = {
- /* IP Address Extension */
- { 1, OL6_N, "IP Address", OT6_NONE, },
-
- /* General Extension */
- { 8193, OL6_N, "IEEE 1003.1 POSIX Timezone", OT6_STR, },
- { 8194, OL6_16N, "Domain Name Server", OT6_V6, },
- { 8195, OL6_N, "Domain Name", OT6_STR, },
-
- { 8196, OL6_N, "SLP Agent", OT6_NONE, },
- { 8197, OL6_N, "SLP Scope" , OT6_NONE, },
- { 8198, OL6_16N, "Network Time Protocol Servers", OT6_V6, },
- { 8199, OL6_N, "NIS Domain", OT6_STR, },
- { 8200, OL6_16N, "NIS Servers", OT6_V6, },
- { 8201, OL6_N, "NIS+ Domain", OT6_STR, },
- { 8202, OL6_16N, "NIS+ Servers", OT6_V6, },
-
- /* TCP Parameters */
- { 8203, 4, "TCP Keepalive Interval", OT6_NUM, },
-
- /* DHCPv6 Extensions */
- { 8204, 4, "Maximum DHCPv6 Message Size", OT6_NUM, },
- { 8205, OL6_N, "DHCP Retransmission and Configuration Parameter",
- OT6_NONE, },
- { 8206, OL6_N, "Extension Request", OT6_NONE, },
- { 8207, OL6_N, "Subnet Prefix", OT6_NONE, },
- { 8208, OL6_N, "Platform Specific Information", OT6_NONE, },
- { 8209, OL6_N, "Platform Class Identifier", OT6_STR, },
- { 8210, OL6_N, "Class Identifier", OT6_STR, },
- { 8211, 16, "Reconfigure Multicast Address", OT6_V6, },
- { 8212, 16, "Renumber DHCPv6 Server Address",
- OT6_V6, },
- { 8213, OL6_N, "Client-Server Authentication", OT6_NONE, },
- { 8214, 4, "Client Key Selection", OT6_NUM, },
-
- /* End Extension */
- { 65536, OL6_Z, "End", OT6_NONE, },
-
- { 0 },
+#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 }
};
-#if 0
-static struct dhcp6_opt *dh6o_pad;
-static struct dhcp6_opt *dh6o_end;
+/* DHCP6 base packet format */
+struct dhcp6 {
+ union {
+ nd_uint8_t m;
+ nd_uint32_t x;
+ } dh6_msgtypexid;
+ /* options follow */
+};
+#define dh6_msgtype dh6_msgtypexid.m
+#define dh6_xid dh6_msgtypexid.x
+#define DH6_XIDMASK 0x00ffffff
+
+/* DHCPv6 relay messages */
+struct dhcp6_relay {
+ 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 */
+};
-static void
-dhcp6opttab_init()
-{
- dh6o_pad = dhcp6opttab_bycode(0);
- dh6o_end = dhcp6opttab_bycode(65536);
-}
-#endif
+/* 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 }
+};
-#if 0
-static struct dhcp6_opt *
-dhcp6opttab_byname(name)
- char *name;
-{
- struct dhcp6_opt *p;
+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 }
+};
- for (p = dh6opttab; p->code; p++)
- if (strcmp(name, p->name) == 0)
- return p;
- return NULL;
-}
-#endif
+struct dhcp6opt {
+ nd_uint16_t dh6opt_type;
+ nd_uint16_t dh6opt_len;
+ /* type-dependent data follows */
+};
-static struct dhcp6_opt *
-dhcp6opttab_bycode(code)
- u_int code;
+static const char *
+dhcp6stcode(const uint16_t code)
{
- struct dhcp6_opt *p;
-
- for (p = dh6opttab; p->code; p++)
- if (p->code == code)
- return p;
- return NULL;
+ return code > 255 ? "INVALID code" : tok2str(dh6opt_stcode_str, "code%u", code);
}
static void
-dhcp6ext_print(u_char *cp, u_char *ep)
+dhcp6opt_print(netdissect_options *ndo,
+ const u_char *cp, const u_char *ep)
{
- u_int16_t code, len;
- struct dhcp6_opt *p;
- char buf[BUFSIZ];
- int i;
+ const struct dhcp6opt *dh6o;
+ const u_char *tp;
+ size_t i;
+ uint16_t opttype;
+ size_t optlen;
+ uint8_t auth_proto;
+ u_int authinfolen, authrealmlen;
+ int remain_len; /* Length of remaining options */
+ int label_len; /* Label length */
+ uint16_t subopt_code;
+ uint16_t subopt_len;
if (cp == ep)
return;
while (cp < ep) {
- if (ep - cp < sizeof(u_int16_t))
+ if (ep < cp + sizeof(*dh6o))
+ goto trunc;
+ 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);
+ 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) {
+ /*(*/
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ switch (EXTRACT_16BITS(tp)) {
+ case 1:
+ if (optlen >= 2 + 6) {
+ ND_PRINT((ndo, " hwaddr/time type %u time %u ",
+ EXTRACT_16BITS(&tp[2]),
+ EXTRACT_32BITS(&tp[4])));
+ for (i = 8; i < optlen; i++)
+ ND_PRINT((ndo, "%02x", tp[i]));
+ /*(*/
+ ND_PRINT((ndo, ")"));
+ } else {
+ /*(*/
+ ND_PRINT((ndo, " ?)"));
+ }
+ break;
+ case 2:
+ if (optlen >= 2 + 8) {
+ ND_PRINT((ndo, " vid "));
+ for (i = 2; i < 2 + 8; i++)
+ ND_PRINT((ndo, "%02x", tp[i]));
+ /*(*/
+ ND_PRINT((ndo, ")"));
+ } else {
+ /*(*/
+ ND_PRINT((ndo, " ?)"));
+ }
+ break;
+ case 3:
+ if (optlen >= 2 + 2) {
+ ND_PRINT((ndo, " hwaddr type %u ",
+ EXTRACT_16BITS(&tp[2])));
+ for (i = 4; i < optlen; i++)
+ ND_PRINT((ndo, "%02x", tp[i]));
+ /*(*/
+ ND_PRINT((ndo, ")"));
+ } else {
+ /*(*/
+ ND_PRINT((ndo, " ?)"));
+ }
+ break;
+ default:
+ ND_PRINT((ndo, " type %d)", EXTRACT_16BITS(tp)));
+ break;
+ }
break;
- code = ntohs(*(u_int16_t *)&cp[0]);
- if (ep - cp < sizeof(u_int16_t) * 2)
+ case DH6OPT_IA_ADDR:
+ if (optlen < 24) {
+ /*(*/
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[0])));
+ ND_PRINT((ndo, " pltime:%u vltime:%u",
+ EXTRACT_32BITS(&tp[16]),
+ EXTRACT_32BITS(&tp[20])));
+ if (optlen > 24) {
+ /* there are sub-options */
+ dhcp6opt_print(ndo, tp + 24, tp + optlen);
+ }
+ ND_PRINT((ndo, ")"));
break;
- if (code != 65535)
- len = ntohs(*(u_int16_t *)&cp[2]);
- else
- len = 0;
- if (ep - cp < len + 4)
+ case DH6OPT_ORO:
+ case DH6OPT_ERO:
+ if (optlen % 2) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ for (i = 0; i < optlen; i += 2) {
+ ND_PRINT((ndo, " %s",
+ tok2str(dh6opt_str, "opt_%u", EXTRACT_16BITS(&tp[i]))));
+ }
+ ND_PRINT((ndo, ")"));
break;
- p = dhcp6opttab_bycode(code);
- if (p == NULL) {
- printf("(unknown, len=%d)", len);
- cp += len + 4;
- continue;
- }
+ case DH6OPT_PREFERENCE:
+ if (optlen != 1) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " %d)", *tp));
+ break;
+ case DH6OPT_ELAPSED_TIME:
+ if (optlen != 2) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " %d)", EXTRACT_16BITS(tp)));
+ break;
+ case DH6OPT_RELAY_MSG:
+ ND_PRINT((ndo, " ("));
+ tp = (const u_char *)(dh6o + 1);
+ dhcp6_print(ndo, tp, optlen);
+ ND_PRINT((ndo, ")"));
+ break;
+ case DH6OPT_AUTH:
+ if (optlen < 11) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ auth_proto = *tp;
+ switch (auth_proto) {
+ case DH6OPT_AUTHPROTO_DELAYED:
+ ND_PRINT((ndo, " proto: delayed"));
+ break;
+ case DH6OPT_AUTHPROTO_RECONFIG:
+ ND_PRINT((ndo, " proto: reconfigure"));
+ break;
+ default:
+ ND_PRINT((ndo, " proto: %d", auth_proto));
+ break;
+ }
+ tp++;
+ switch (*tp) {
+ case DH6OPT_AUTHALG_HMACMD5:
+ /* XXX: may depend on the protocol */
+ ND_PRINT((ndo, ", alg: HMAC-MD5"));
+ break;
+ default:
+ ND_PRINT((ndo, ", alg: %d", *tp));
+ break;
+ }
+ tp++;
+ switch (*tp) {
+ case DH6OPT_AUTHRDM_MONOCOUNTER:
+ ND_PRINT((ndo, ", RDM: mono"));
+ break;
+ default:
+ ND_PRINT((ndo, ", RDM: %d", *tp));
+ break;
+ }
+ tp++;
+ ND_PRINT((ndo, ", RD:"));
+ for (i = 0; i < 4; i++, tp += 2)
+ ND_PRINT((ndo, " %04x", EXTRACT_16BITS(tp)));
+
+ /* protocol dependent part */
+ authinfolen = optlen - 11;
+ switch (auth_proto) {
+ case DH6OPT_AUTHPROTO_DELAYED:
+ if (authinfolen == 0)
+ break;
+ if (authinfolen < 20) {
+ ND_PRINT((ndo, " ??"));
+ break;
+ }
+ authrealmlen = authinfolen - 20;
+ if (authrealmlen > 0) {
+ ND_PRINT((ndo, ", realm: "));
+ }
+ for (i = 0; i < authrealmlen; i++, tp++)
+ ND_PRINT((ndo, "%02x", *tp));
+ ND_PRINT((ndo, ", key ID: %08x", EXTRACT_32BITS(tp)));
+ tp += 4;
+ ND_PRINT((ndo, ", HMAC-MD5:"));
+ for (i = 0; i < 4; i++, tp+= 4)
+ ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tp)));
+ break;
+ case DH6OPT_AUTHPROTO_RECONFIG:
+ if (authinfolen != 17) {
+ ND_PRINT((ndo, " ??"));
+ break;
+ }
+ switch (*tp++) {
+ case DH6OPT_AUTHRECONFIG_KEY:
+ ND_PRINT((ndo, " reconfig-key"));
+ break;
+ case DH6OPT_AUTHRECONFIG_HMACMD5:
+ ND_PRINT((ndo, " type: HMAC-MD5"));
+ break;
+ default:
+ ND_PRINT((ndo, " type: ??"));
+ break;
+ }
+ ND_PRINT((ndo, " value:"));
+ for (i = 0; i < 4; i++, tp+= 4)
+ ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tp)));
+ break;
+ default:
+ ND_PRINT((ndo, " ??"));
+ break;
+ }
- /* sanity check on length */
- switch (p->len) {
- case OL6_N:
+ ND_PRINT((ndo, ")"));
break;
- case OL6_16N:
- if (len % 16 != 0)
- goto trunc;
+ case DH6OPT_RAPID_COMMIT: /* nothing todo */
+ ND_PRINT((ndo, ")"));
break;
- case OL6_Z:
- if (len != 0)
- goto trunc;
+ case DH6OPT_INTERFACE_ID:
+ case DH6OPT_SUBSCRIBER_ID:
+ /*
+ * Since we cannot predict the encoding, print hex dump
+ * at most 10 characters.
+ */
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " "));
+ for (i = 0; i < optlen && i < 10; i++)
+ ND_PRINT((ndo, "%02x", tp[i]));
+ ND_PRINT((ndo, "...)"));
break;
- default:
- if (len != p->len)
- goto trunc;
+ case DH6OPT_RECONF_MSG:
+ if (optlen != 1) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ switch (*tp) {
+ case DH6_RENEW:
+ ND_PRINT((ndo, " for renew)"));
+ break;
+ case DH6_INFORM_REQ:
+ ND_PRINT((ndo, " for inf-req)"));
+ break;
+ default:
+ ND_PRINT((ndo, " for ?\?\?(%02x))", *tp));
+ break;
+ }
break;
- }
- if (cp + 4 + len > ep) {
- printf(" [|%s]", p->name);
- return;
- }
-
- printf(" (%s, ", p->name);
- switch (p->type) {
- case OT6_V6:
- for (i = 0; i < len; i += 16) {
- inet_ntop(AF_INET6, &cp[4 + i], buf,
- sizeof(buf));
- if (i != 0)
- printf(",");
- printf("%s", buf);
+ case DH6OPT_RECONF_ACCEPT: /* nothing todo */
+ ND_PRINT((ndo, ")"));
+ break;
+ case DH6OPT_SIP_SERVER_A:
+ case DH6OPT_DNS_SERVERS:
+ case DH6OPT_SNTP_SERVERS:
+ case DH6OPT_NIS_SERVERS:
+ case DH6OPT_NISP_SERVERS:
+ case DH6OPT_BCMCS_SERVER_A:
+ case DH6OPT_PANA_AGENT:
+ case DH6OPT_LQ_CLIENT_LINK:
+ if (optlen % 16) {
+ ND_PRINT((ndo, " ?)"));
+ break;
}
+ tp = (const u_char *)(dh6o + 1);
+ for (i = 0; i < optlen; i += 16)
+ ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[i])));
+ ND_PRINT((ndo, ")"));
break;
- case OT6_STR:
- memset(&buf, 0, sizeof(buf));
- strncpy(buf, &cp[4], len);
- printf("%s", buf);
+ 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 OT6_NUM:
- printf("%d", (u_int32_t)ntohl(*(u_int32_t *)&cp[4]));
+ case DH6OPT_STATUS_CODE:
+ if (optlen < 2) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0]))));
break;
+ case DH6OPT_IA_NA:
+ case DH6OPT_IA_PD:
+ if (optlen < 12) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " IAID:%u T1:%u T2:%u",
+ EXTRACT_32BITS(&tp[0]),
+ EXTRACT_32BITS(&tp[4]),
+ EXTRACT_32BITS(&tp[8])));
+ if (optlen > 12) {
+ /* there are sub-options */
+ dhcp6opt_print(ndo, tp + 12, tp + optlen);
+ }
+ ND_PRINT((ndo, ")"));
+ break;
+ case DH6OPT_IA_TA:
+ if (optlen < 4) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " IAID:%u", EXTRACT_32BITS(tp)));
+ if (optlen > 4) {
+ /* there are sub-options */
+ dhcp6opt_print(ndo, tp + 4, tp + optlen);
+ }
+ ND_PRINT((ndo, ")"));
+ break;
+ case DH6OPT_IA_PD_PREFIX:
+ if (optlen < 25) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " %s/%d", ip6addr_string(ndo, &tp[9]), tp[8]));
+ ND_PRINT((ndo, " pltime:%u vltime:%u",
+ EXTRACT_32BITS(&tp[0]),
+ EXTRACT_32BITS(&tp[4])));
+ if (optlen > 25) {
+ /* there are sub-options */
+ dhcp6opt_print(ndo, tp + 25, tp + optlen);
+ }
+ ND_PRINT((ndo, ")"));
+ break;
+ case DH6OPT_LIFETIME:
+ case DH6OPT_CLT_TIME:
+ if (optlen != 4) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " %d)", EXTRACT_32BITS(tp)));
+ break;
+ case DH6OPT_REMOTE_ID:
+ if (optlen < 4) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " %d ", EXTRACT_32BITS(tp)));
+ /*
+ * Print hex dump first 10 characters.
+ */
+ for (i = 4; i < optlen && i < 14; i++)
+ ND_PRINT((ndo, "%02x", tp[i]));
+ ND_PRINT((ndo, "...)"));
+ break;
+ case DH6OPT_LQ_QUERY:
+ if (optlen < 17) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ switch (*tp) {
+ case 1:
+ ND_PRINT((ndo, " by-address"));
+ break;
+ case 2:
+ ND_PRINT((ndo, " by-clientID"));
+ break;
+ default:
+ ND_PRINT((ndo, " type_%d", (int)*tp));
+ break;
+ }
+ ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[1])));
+ if (optlen > 17) {
+ /* there are query-options */
+ dhcp6opt_print(ndo, tp + 17, tp + optlen);
+ }
+ ND_PRINT((ndo, ")"));
+ break;
+ case DH6OPT_CLIENT_DATA:
+ tp = (const u_char *)(dh6o + 1);
+ if (optlen > 0) {
+ /* there are encapsulated options */
+ dhcp6opt_print(ndo, tp, tp + optlen);
+ }
+ ND_PRINT((ndo, ")"));
+ break;
+ case DH6OPT_LQ_RELAY_DATA:
+ if (optlen < 16) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT((ndo, " %s ", ip6addr_string(ndo, &tp[0])));
+ /*
+ * Print hex dump first 10 characters.
+ */
+ for (i = 16; i < optlen && i < 26; i++)
+ ND_PRINT((ndo, "%02x", tp[i]));
+ ND_PRINT((ndo, "...)"));
+ break;
+ case DH6OPT_NTP_SERVER:
+ if (optlen < 4) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ while (tp < cp + sizeof(*dh6o) + optlen - 4) {
+ subopt_code = EXTRACT_16BITS(tp);
+ tp += 2;
+ subopt_len = EXTRACT_16BITS(tp);
+ tp += 2;
+ if (tp + subopt_len > cp + sizeof(*dh6o) + optlen)
+ goto trunc;
+ ND_PRINT((ndo, " subopt:%d", subopt_code));
+ switch (subopt_code) {
+ case DH6OPT_NTP_SUBOPTION_SRV_ADDR:
+ case DH6OPT_NTP_SUBOPTION_MC_ADDR:
+ if (subopt_len != 16) {
+ ND_PRINT((ndo, " ?"));
+ break;
+ }
+ ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[0])));
+ break;
+ case DH6OPT_NTP_SUBOPTION_SRV_FQDN:
+ ND_PRINT((ndo, " "));
+ if (ns_nprint(ndo, tp, tp + subopt_len) == NULL)
+ goto trunc;
+ break;
+ default:
+ ND_PRINT((ndo, " ?"));
+ break;
+ }
+ tp += subopt_len;
+ }
+ ND_PRINT((ndo, ")"));
+ break;
+ case DH6OPT_AFTR_NAME:
+ if (optlen < 3) {
+ ND_PRINT((ndo, " ?)"));
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ remain_len = optlen;
+ ND_PRINT((ndo, " "));
+ /* Encoding is described in section 3.1 of RFC 1035 */
+ while (remain_len && *tp) {
+ label_len = *tp++;
+ if (label_len < remain_len - 1) {
+ (void)fn_printn(ndo, tp, label_len, NULL);
+ tp += label_len;
+ remain_len -= (label_len + 1);
+ if(*tp) ND_PRINT((ndo, "."));
+ } else {
+ ND_PRINT((ndo, " ?"));
+ break;
+ }
+ }
+ 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:
- for (i = 0; i < len; i++)
- printf("%02x", cp[4 + i] & 0xff);
+ ND_PRINT((ndo, ")"));
+ break;
}
- printf(")");
- cp += len + 4;
+
+ cp += sizeof(*dh6o) + optlen;
}
return;
trunc:
- printf("[|dhcp6ext]");
+ ND_PRINT((ndo, "[|dhcp6ext]"));
}
/*
- * Print dhcp6 requests
+ * 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)
{
- union dhcp6 *dh6;
- u_char *ep;
- u_char *extp;
- u_int16_t field16;
+ const struct dhcp6 *dh6;
+ const struct dhcp6_relay *dh6relay;
+ const u_char *ep;
+ 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 = (union dhcp6 *)cp;
- TCHECK(dh6->dh6_msgtype);
- switch (dh6->dh6_msgtype) {
- case DH6_SOLICIT:
- if (!(vflag && TTEST(dh6->dh6_sol.dh6sol_relayaddr))) {
- printf(" solicit");
- 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);
- printf(" solicit ("); /*)*/
- if (dh6->dh6_sol.dh6sol_flags != 0) {
- u_int8_t f = dh6->dh6_sol.dh6sol_flags;
- printf("%s%s ",
- (f & DH6SOL_PREFIX) ? "P" : "",
- (f & DH6SOL_CLOSE) ? "C" : "");
- }
+ if (!ndo->ndo_vflag) {
+ ND_PRINT((ndo, " %s", name));
+ return;
+ }
- memcpy(&field16, &dh6->dh6_sol.dh6sol_plen_id,
- sizeof(field16));
- field16 = ntohs(field16);
- if (field16 & ~DH6SOL_SOLICIT_PLEN_MASK)
- printf("plen=%d ", DH6SOL_SOLICIT_PLEN(field16));
- printf("solicit-ID=%d", DH6SOL_SOLICIT_ID(field16));
-
- printf(" cliaddr=%s",
- ip6addr_string(&dh6->dh6_sol.dh6sol_cliaddr));
- printf(" relayaddr=%s",
- ip6addr_string(&dh6->dh6_sol.dh6sol_relayaddr));
- /*(*/
- printf(")");
- break;
- case DH6_ADVERT:
- if (!(vflag && TTEST(dh6->dh6_adv.dh6adv_serveraddr))) {
- printf(" advert");
- break;
- }
- printf(" advert ("); /*)*/
- memcpy(&field16, &dh6->dh6_adv.dh6adv_rsv_id, sizeof(field16));
- printf("solicit-ID=%d",
- ntohs(field16) & DH6SOL_SOLICIT_ID_MASK);
- printf(" pref=%u", dh6->dh6_adv.dh6adv_pref);
- printf(" cliaddr=%s",
- ip6addr_string(&dh6->dh6_adv.dh6adv_cliaddr));
- printf(" relayaddr=%s",
- ip6addr_string(&dh6->dh6_adv.dh6adv_relayaddr));
- printf(" servaddr=%s",
- ip6addr_string(&dh6->dh6_adv.dh6adv_serveraddr));
- extp = (u_char *)((&dh6->dh6_adv) + 1);
- dhcp6ext_print(extp, ep);
- /*(*/
- printf(")");
- break;
- case DH6_REQUEST:
- if (!(vflag && TTEST(dh6->dh6_req.dh6req_relayaddr))) {
- printf(" request");
- break;
- }
- printf(" request ("); /*)*/
- if (dh6->dh6_req.dh6req_flags != 0) {
- u_int8_t f = dh6->dh6_req.dh6req_flags;
- printf("%s%s ",
- (f & DH6REQ_CLOSE) ? "C" : "",
- (f & DH6REQ_REBOOT) ? "R" : "");
- }
- printf("xid=0x%04x", dh6->dh6_req.dh6req_xid);
- printf(" cliaddr=%s",
- ip6addr_string(&dh6->dh6_req.dh6req_cliaddr));
- printf(" relayaddr=%s",
- ip6addr_string(&dh6->dh6_req.dh6req_relayaddr));
- printf(" servaddr=%s",
- ip6addr_string(&dh6->dh6_req.dh6req_serveraddr));
- dhcp6ext_print((char *)(&dh6->dh6_req + 1), ep);
- /*(*/
- printf(")");
- break;
- case DH6_REPLY:
- if (!(vflag && TTEST(dh6->dh6_rep.dh6rep_xid))) {
- printf(" reply");
- break;
- }
- printf(" reply ("); /*)*/
- if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_RELAYPRESENT) != 0)
- printf("R ");
- printf("stat=0x%02x",
- dh6->dh6_rep.dh6rep_flagandstat & DH6REP_STATMASK);
- printf(" xid=0x%04x", dh6->dh6_rep.dh6rep_xid);
- printf(" cliaddr=%s",
- ip6addr_string(&dh6->dh6_rep.dh6rep_cliaddr));
- extp = (u_char *)((&dh6->dh6_rep) + 1);
- if ((dh6->dh6_rep.dh6rep_flagandstat & DH6REP_RELAYPRESENT) !=
- 0) {
- printf(" relayaddr=%s", ip6addr_string(extp));
- extp += sizeof(struct in6_addr);
- }
- dhcp6ext_print(extp, ep);
- /*(*/
- printf(")");
- break;
- case DH6_RELEASE:
- printf(" release");
- break;
- case DH6_RECONFIG:
- printf(" reconfig");
- break;
+ /* XXX relay agent messages have to be handled differently */
+
+ ND_PRINT((ndo, " %s (", name)); /*)*/
+ if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
+ dh6->dh6_msgtype != DH6_RELAY_REPLY) {
+ ND_PRINT((ndo, "xid=%x", EXTRACT_32BITS(&dh6->dh6_xid) & DH6_XIDMASK));
+ extp = (const u_char *)(dh6 + 1);
+ dhcp6opt_print(ndo, extp, ep);
+ } else { /* relay messages */
+ struct in6_addr addr6;
+
+ ND_TCHECK(dh6relay->dh6relay_peeraddr);
+
+ memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6));
+ ND_PRINT((ndo, "linkaddr=%s", ip6addr_string(ndo, &addr6)));
+
+ memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6));
+ ND_PRINT((ndo, " peeraddr=%s", ip6addr_string(ndo, &addr6)));
+
+ dhcp6opt_print(ndo, (const u_char *)(dh6relay + 1), ep);
}
+ /*(*/
+ ND_PRINT((ndo, ")"));
return;
trunc:
- printf("%s", tstr);
+ ND_PRINT((ndo, "[|dhcp6]"));
}
projects / tcpdump / blobdiff