/*
* 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.
*/
/*
- * draft-ietf-dhc-dhcpv6-22.txt
+ * RFC3315: DHCPv6
+ * supported DHCPv6 options:
+ * RFC3319: Session Initiation Protocol (SIP) Servers options,
+ * RFC3633: IPv6 Prefix options,
+ * RFC3646: DNS Configuration options,
+ * RFC3898: Network Information Service (NIS) Configuration options,
+ * RFC4075: Simple Network Time Protocol (SNTP) Configuration option,
+ * RFC4242: Information Refresh Time option,
+ * RFC4280: Broadcast and Multicast Control Servers options,
+ * RFC5908: Network Time Protocol (NTP) Server Option for DHCPv6
+ * RFC6334: Dual-Stack Lite option,
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.16 2002-01-19 08:05:54 guy Exp $";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-struct mbuf;
-struct rtentry;
+#include <tcpdump-stdinc.h>
-#include <netinet/in.h>
-
-#include <ctype.h>
#include <stdio.h>
#include <string.h>
-#include <arpa/inet.h>
#include "interface.h"
#include "addrtoname.h"
+#include "extract.h"
+
+/* lease duration */
+#define DHCP6_DURATION_INFINITE 0xffffffff
/* Error Values */
#define DH6ERR_FAILURE 16
#define DH6ERR_OPTUNAVAIL 20
/* Message type */
+#define DH6_SOLICIT 1
+#define DH6_ADVERTISE 2
+#define DH6_REQUEST 3
+#define DH6_CONFIRM 4
+#define DH6_RENEW 5
+#define DH6_REBIND 6
#define DH6_REPLY 7
+#define DH6_RELEASE 8
+#define DH6_DECLINE 9
+#define DH6_RECONFIGURE 10
#define DH6_INFORM_REQ 11
+#define DH6_RELAY_FORW 12
+#define DH6_RELAY_REPLY 13
+#define DH6_LEASEQUERY 14
+#define DH6_LQ_REPLY 15
/* DHCP6 base packet format */
struct dhcp6 {
u_int8_t m;
u_int32_t x;
} dh6_msgtypexid;
- struct in6_addr dh6_servaddr;
/* options follow */
-} __attribute__ ((__packed__));
+};
#define dh6_msgtype dh6_msgtypexid.m
#define dh6_xid dh6_msgtypexid.x
#define DH6_XIDMASK 0x00ffffff
-/* option */
-#define DH6OPT_DUID 1 /* TBD */
-#define DH6OPT_DNS 11 /* TBD */
+/* DHCPv6 relay messages */
+struct dhcp6_relay {
+ u_int8_t dh6relay_msgtype;
+ u_int8_t dh6relay_hcnt;
+ u_int8_t dh6relay_linkaddr[16]; /* XXX: badly aligned */
+ u_int8_t dh6relay_peeraddr[16];
+ /* options follow */
+};
+
+/* options */
+#define DH6OPT_CLIENTID 1
+#define DH6OPT_SERVERID 2
+#define DH6OPT_IA_NA 3
+#define DH6OPT_IA_TA 4
+#define DH6OPT_IA_ADDR 5
+#define DH6OPT_ORO 6
+#define DH6OPT_PREFERENCE 7
+# define DH6OPT_PREF_MAX 255
+#define DH6OPT_ELAPSED_TIME 8
+#define DH6OPT_RELAY_MSG 9
+/*#define DH6OPT_SERVER_MSG 10 deprecated */
+#define DH6OPT_AUTH 11
+# define DH6OPT_AUTHPROTO_DELAYED 2
+# define DH6OPT_AUTHPROTO_RECONFIG 3
+# define DH6OPT_AUTHALG_HMACMD5 1
+# define DH6OPT_AUTHRDM_MONOCOUNTER 0
+# define DH6OPT_AUTHRECONFIG_KEY 1
+# define DH6OPT_AUTHRECONFIG_HMACMD5 2
+#define DH6OPT_UNICAST 12
+#define DH6OPT_STATUS_CODE 13
+# define DH6OPT_STCODE_SUCCESS 0
+# define DH6OPT_STCODE_UNSPECFAIL 1
+# define DH6OPT_STCODE_NOADDRAVAIL 2
+# define DH6OPT_STCODE_NOBINDING 3
+# define DH6OPT_STCODE_NOTONLINK 4
+# define DH6OPT_STCODE_USEMULTICAST 5
+# define DH6OPT_STCODE_NOPREFIXAVAIL 6
+# define DH6OPT_STCODE_UNKNOWNQUERYTYPE 7
+# define DH6OPT_STCODE_MALFORMEDQUERY 8
+# define DH6OPT_STCODE_NOTCONFIGURED 9
+# define DH6OPT_STCODE_NOTALLOWED 10
+#define DH6OPT_RAPID_COMMIT 14
+#define DH6OPT_USER_CLASS 15
+#define DH6OPT_VENDOR_CLASS 16
+#define DH6OPT_VENDOR_OPTS 17
+#define DH6OPT_INTERFACE_ID 18
+#define DH6OPT_RECONF_MSG 19
+#define DH6OPT_RECONF_ACCEPT 20
+#define DH6OPT_SIP_SERVER_D 21
+#define DH6OPT_SIP_SERVER_A 22
+#define DH6OPT_DNS_SERVERS 23
+#define DH6OPT_DOMAIN_LIST 24
+#define DH6OPT_IA_PD 25
+#define DH6OPT_IA_PD_PREFIX 26
+#define DH6OPT_NIS_SERVERS 27
+#define DH6OPT_NISP_SERVERS 28
+#define DH6OPT_NIS_NAME 29
+#define DH6OPT_NISP_NAME 30
+#define DH6OPT_SNTP_SERVERS 31
+#define DH6OPT_LIFETIME 32
+#define DH6OPT_BCMCS_SERVER_D 33
+#define DH6OPT_BCMCS_SERVER_A 34
+#define DH6OPT_GEOCONF_CIVIC 36
+#define DH6OPT_REMOTE_ID 37
+#define DH6OPT_SUBSCRIBER_ID 38
+#define DH6OPT_CLIENT_FQDN 39
+#define DH6OPT_PANA_AGENT 40
+#define DH6OPT_NEW_POSIX_TIMEZONE 41
+#define DH6OPT_NEW_TZDB_TIMEZONE 42
+#define DH6OPT_ERO 43
+#define DH6OPT_LQ_QUERY 44
+#define DH6OPT_CLIENT_DATA 45
+#define DH6OPT_CLT_TIME 46
+#define DH6OPT_LQ_RELAY_DATA 47
+#define DH6OPT_LQ_CLIENT_LINK 48
+#define DH6OPT_NTP_SERVER 56
+# define DH6OPT_NTP_SUBOPTION_SRV_ADDR 1
+# define DH6OPT_NTP_SUBOPTION_MC_ADDR 2
+# define DH6OPT_NTP_SUBOPTION_SRV_FQDN 3
+#define DH6OPT_AFTR_NAME 64
+
struct dhcp6opt {
u_int16_t dh6opt_type;
u_int16_t dh6opt_len;
/* type-dependent data follows */
-} __attribute__ ((__packed__));
+};
+
+static const char *
+dhcp6opt_name(int type)
+{
+ static char genstr[sizeof("opt_65535") + 1]; /* XXX thread unsafe */
+
+ if (type > 65535)
+ return "INVALID-option";
+
+ switch(type) {
+ case DH6OPT_CLIENTID:
+ return "client-ID";
+ case DH6OPT_SERVERID:
+ return "server-ID";
+ case DH6OPT_IA_NA:
+ return "IA_NA";
+ case DH6OPT_IA_TA:
+ return "IA_TA";
+ case DH6OPT_IA_ADDR:
+ return "IA_ADDR";
+ case DH6OPT_ORO:
+ return "option-request";
+ case DH6OPT_PREFERENCE:
+ return "preference";
+ case DH6OPT_ELAPSED_TIME:
+ return "elapsed-time";
+ case DH6OPT_RELAY_MSG:
+ return "relay-message";
+ case DH6OPT_AUTH:
+ return "authentication";
+ case DH6OPT_UNICAST:
+ return "server-unicast";
+ case DH6OPT_STATUS_CODE:
+ return "status-code";
+ case DH6OPT_RAPID_COMMIT:
+ return "rapid-commit";
+ case DH6OPT_USER_CLASS:
+ return "user-class";
+ case DH6OPT_VENDOR_CLASS:
+ return "vendor-class";
+ case DH6OPT_VENDOR_OPTS:
+ return "vendor-specific-info";
+ case DH6OPT_INTERFACE_ID:
+ return "interface-ID";
+ case DH6OPT_RECONF_MSG:
+ return "reconfigure-message";
+ case DH6OPT_RECONF_ACCEPT:
+ return "reconfigure-accept";
+ case DH6OPT_SIP_SERVER_D:
+ return "SIP-servers-domain";
+ case DH6OPT_SIP_SERVER_A:
+ return "SIP-servers-address";
+ case DH6OPT_DNS_SERVERS:
+ return "DNS-server";
+ case DH6OPT_DOMAIN_LIST:
+ return "DNS-search-list";
+ case DH6OPT_IA_PD:
+ return "IA_PD";
+ case DH6OPT_IA_PD_PREFIX:
+ return "IA_PD-prefix";
+ case DH6OPT_SNTP_SERVERS:
+ return "SNTP-servers";
+ case DH6OPT_LIFETIME:
+ return "lifetime";
+ case DH6OPT_NIS_SERVERS:
+ return "NIS-server";
+ case DH6OPT_NISP_SERVERS:
+ return "NIS+-server";
+ case DH6OPT_NIS_NAME:
+ return "NIS-domain-name";
+ case DH6OPT_NISP_NAME:
+ return "NIS+-domain-name";
+ case DH6OPT_BCMCS_SERVER_D:
+ return "BCMCS-domain-name";
+ case DH6OPT_BCMCS_SERVER_A:
+ return "BCMCS-server";
+ case DH6OPT_GEOCONF_CIVIC:
+ return "Geoconf-Civic";
+ case DH6OPT_REMOTE_ID:
+ return "Remote-ID";
+ case DH6OPT_SUBSCRIBER_ID:
+ return "Subscriber-ID";
+ case DH6OPT_CLIENT_FQDN:
+ return "Client-FQDN";
+ case DH6OPT_PANA_AGENT:
+ return "PANA-agent";
+ case DH6OPT_NEW_POSIX_TIMEZONE:
+ return "POSIX-timezone";
+ case DH6OPT_NEW_TZDB_TIMEZONE:
+ return "POSIX-tz-database";
+ case DH6OPT_ERO:
+ return "Echo-request-option";
+ case DH6OPT_LQ_QUERY:
+ return "Lease-query";
+ case DH6OPT_CLIENT_DATA:
+ return "LQ-client-data";
+ case DH6OPT_CLT_TIME:
+ return "Clt-time";
+ case DH6OPT_LQ_RELAY_DATA:
+ return "LQ-relay-data";
+ case DH6OPT_LQ_CLIENT_LINK:
+ return "LQ-client-link";
+ case DH6OPT_NTP_SERVER:
+ return "NTP-server";
+ case DH6OPT_AFTR_NAME:
+ return "AFTR-Name";
+ default:
+ snprintf(genstr, sizeof(genstr), "opt_%d", type);
+ return(genstr);
+ }
+}
+
+static const char *
+dhcp6stcode(int code)
+{
+ static char genstr[sizeof("code255") + 1]; /* XXX thread unsafe */
+
+ if (code > 255)
+ return "INVALID code";
+
+ switch(code) {
+ case DH6OPT_STCODE_SUCCESS:
+ return "success";
+ case DH6OPT_STCODE_UNSPECFAIL:
+ return "unspec failure";
+ case DH6OPT_STCODE_NOADDRAVAIL:
+ return "no addresses";
+ case DH6OPT_STCODE_NOBINDING:
+ return "no binding";
+ case DH6OPT_STCODE_NOTONLINK:
+ return "not on-link";
+ case DH6OPT_STCODE_USEMULTICAST:
+ return "use multicast";
+ case DH6OPT_STCODE_NOPREFIXAVAIL:
+ return "no prefixes";
+ case DH6OPT_STCODE_UNKNOWNQUERYTYPE:
+ return "unknown query type";
+ case DH6OPT_STCODE_MALFORMEDQUERY:
+ return "malformed query";
+ case DH6OPT_STCODE_NOTCONFIGURED:
+ return "not configured";
+ case DH6OPT_STCODE_NOTALLOWED:
+ return "not allowed";
+ default:
+ snprintf(genstr, sizeof(genstr), "code%d", code);
+ return(genstr);
+ }
+}
static void
-dhcp6opt_print(u_char *cp, u_char *ep)
+dhcp6opt_print(const u_char *cp, const u_char *ep)
{
- struct dhcp6opt *dh6o;
- u_char *tp;
- int i;
+ const struct dhcp6opt *dh6o;
+ const u_char *tp;
+ size_t i;
+ u_int16_t opttype;
size_t optlen;
+ u_int8_t auth_proto;
+ u_int authinfolen, authrealmlen;
+ int remain_len; /* Length of remaining options */
+ int label_len; /* Label length */
+ u_int16_t subopt_code;
+ u_int16_t subopt_len;
if (cp == ep)
return;
while (cp < ep) {
- if (ep - cp < sizeof(*dh6o))
+ if (ep < cp + sizeof(*dh6o))
goto trunc;
dh6o = (struct dhcp6opt *)cp;
- optlen = ntohs(dh6o->dh6opt_len);
- if (ep - cp < sizeof(*dh6o) + optlen)
+ TCHECK(*dh6o);
+ optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
+ if (ep < cp + sizeof(*dh6o) + optlen)
goto trunc;
- switch (ntohs(dh6o->dh6opt_type)) {
- case DH6OPT_DUID:
- printf(" (duid"); /*)*/
+ opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
+ printf(" (%s", dhcp6opt_name(opttype));
+ switch (opttype) {
+ case DH6OPT_CLIENTID:
+ case DH6OPT_SERVERID:
if (optlen < 2) {
/*(*/
- printf(" ??)");
+ printf(" ?)");
break;
}
tp = (u_char *)(dh6o + 1);
- switch (ntohs(*(u_int16_t *)tp)) {
+ switch (EXTRACT_16BITS(tp)) {
case 1:
if (optlen >= 2 + 6) {
- printf(" hwaddr/time time %u type %u ",
- ntohl(*(u_int32_t *)&tp[2]),
- ntohs(*(u_int16_t *)&tp[6]));
+ printf(" hwaddr/time type %u time %u ",
+ EXTRACT_16BITS(&tp[2]),
+ EXTRACT_32BITS(&tp[4]));
for (i = 8; i < optlen; i++)
printf("%02x", tp[i]);
/*(*/
printf(")");
} else {
/*(*/
- printf(" ??)");
+ printf(" ?)");
}
break;
case 2:
printf(")");
} else {
/*(*/
- printf(" ??)");
+ printf(" ?)");
}
break;
case 3:
if (optlen >= 2 + 2) {
printf(" hwaddr type %u ",
- ntohs(*(u_int16_t *)&tp[2]));
+ EXTRACT_16BITS(&tp[2]));
for (i = 4; i < optlen; i++)
printf("%02x", tp[i]);
/*(*/
printf(")");
} else {
/*(*/
- printf(" ??)");
+ printf(" ?)");
}
+ break;
+ default:
+ printf(" type %d)", EXTRACT_16BITS(tp));
+ break;
}
break;
- case DH6OPT_DNS:
- printf(" (dnsserver"); /*)*/
- if (optlen % 16) {
+ case DH6OPT_IA_ADDR:
+ if (optlen < 24) {
/*(*/
- printf(" ??)");
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ printf(" %s", ip6addr_string(&tp[0]));
+ printf(" pltime:%u vltime:%u",
+ EXTRACT_32BITS(&tp[16]),
+ EXTRACT_32BITS(&tp[20]));
+ if (optlen > 24) {
+ /* there are sub-options */
+ dhcp6opt_print(tp + 24, tp + optlen);
+ }
+ printf(")");
+ break;
+ case DH6OPT_ORO:
+ case DH6OPT_ERO:
+ if (optlen % 2) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ for (i = 0; i < optlen; i += 2) {
+ printf(" %s",
+ dhcp6opt_name(EXTRACT_16BITS(&tp[i])));
+ }
+ printf(")");
+ break;
+ case DH6OPT_PREFERENCE:
+ if (optlen != 1) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ printf(" %d)", *tp);
+ break;
+ case DH6OPT_ELAPSED_TIME:
+ if (optlen != 2) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ printf(" %d)", EXTRACT_16BITS(tp));
+ break;
+ case DH6OPT_RELAY_MSG:
+ printf(" (");
+ tp = (u_char *)(dh6o + 1);
+ dhcp6_print(tp, optlen);
+ printf(")");
+ break;
+ case DH6OPT_AUTH:
+ if (optlen < 11) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ auth_proto = *tp;
+ switch (auth_proto) {
+ case DH6OPT_AUTHPROTO_DELAYED:
+ printf(" proto: delayed");
+ break;
+ case DH6OPT_AUTHPROTO_RECONFIG:
+ printf(" proto: reconfigure");
+ break;
+ default:
+ printf(" proto: %d", auth_proto);
+ break;
+ }
+ tp++;
+ switch (*tp) {
+ case DH6OPT_AUTHALG_HMACMD5:
+ /* XXX: may depend on the protocol */
+ printf(", alg: HMAC-MD5");
+ break;
+ default:
+ printf(", alg: %d", *tp);
+ break;
+ }
+ tp++;
+ switch (*tp) {
+ case DH6OPT_AUTHRDM_MONOCOUNTER:
+ printf(", RDM: mono");
+ break;
+ default:
+ printf(", RDM: %d", *tp);
+ break;
+ }
+ tp++;
+ printf(", RD:");
+ for (i = 0; i < 4; i++, tp += 2)
+ printf(" %04x", EXTRACT_16BITS(tp));
+
+ /* protocol dependent part */
+ authinfolen = optlen - 11;
+ switch (auth_proto) {
+ case DH6OPT_AUTHPROTO_DELAYED:
+ if (authinfolen == 0)
+ break;
+ if (authinfolen < 20) {
+ printf(" ??");
+ break;
+ }
+ authrealmlen = authinfolen - 20;
+ if (authrealmlen > 0) {
+ printf(", realm: ");
+ }
+ for (i = 0; i < authrealmlen; i++, tp++)
+ printf("%02x", *tp);
+ printf(", key ID: %08x", EXTRACT_32BITS(tp));
+ tp += 4;
+ printf(", HMAC-MD5:");
+ for (i = 0; i < 4; i++, tp+= 4)
+ printf(" %08x", EXTRACT_32BITS(tp));
+ break;
+ case DH6OPT_AUTHPROTO_RECONFIG:
+ if (authinfolen != 17) {
+ printf(" ??");
+ break;
+ }
+ switch (*tp++) {
+ case DH6OPT_AUTHRECONFIG_KEY:
+ printf(" reconfig-key");
+ break;
+ case DH6OPT_AUTHRECONFIG_HMACMD5:
+ printf(" type: HMAC-MD5");
+ break;
+ default:
+ printf(" type: ??");
+ break;
+ }
+ printf(" value:");
+ for (i = 0; i < 4; i++, tp+= 4)
+ printf(" %08x", EXTRACT_32BITS(tp));
+ break;
+ default:
+ printf(" ??");
+ break;
+ }
+
+ printf(")");
+ break;
+ case DH6OPT_RAPID_COMMIT: /* nothing todo */
+ printf(")");
+ break;
+ case DH6OPT_INTERFACE_ID:
+ case DH6OPT_SUBSCRIBER_ID:
+ /*
+ * Since we cannot predict the encoding, print hex dump
+ * at most 10 characters.
+ */
+ tp = (u_char *)(dh6o + 1);
+ printf(" ");
+ for (i = 0; i < optlen && i < 10; i++)
+ printf("%02x", tp[i]);
+ printf("...)");
+ break;
+ case DH6OPT_RECONF_MSG:
+ tp = (u_char *)(dh6o + 1);
+ switch (*tp) {
+ case DH6_RENEW:
+ printf(" for renew)");
+ break;
+ case DH6_INFORM_REQ:
+ printf(" for inf-req)");
+ break;
+ default:
+ printf(" for ?\?\?(%02x))", *tp);
+ break;
+ }
+ break;
+ case DH6OPT_RECONF_ACCEPT: /* nothing todo */
+ printf(")");
+ break;
+ case DH6OPT_SIP_SERVER_A:
+ case DH6OPT_DNS_SERVERS:
+ case DH6OPT_SNTP_SERVERS:
+ case DH6OPT_NIS_SERVERS:
+ case DH6OPT_NISP_SERVERS:
+ case DH6OPT_BCMCS_SERVER_A:
+ case DH6OPT_PANA_AGENT:
+ case DH6OPT_LQ_CLIENT_LINK:
+ if (optlen % 16) {
+ printf(" ?)");
break;
}
tp = (u_char *)(dh6o + 1);
for (i = 0; i < optlen; i += 16)
printf(" %s", ip6addr_string(&tp[i]));
- /*(*/
printf(")");
+ break;
+ case DH6OPT_SIP_SERVER_D:
+ case DH6OPT_DOMAIN_LIST:
+ tp = (u_char *)(dh6o + 1);
+ while (tp < cp + sizeof(*dh6o) + optlen) {
+ putchar(' ');
+ if ((tp = ns_nprint(tp, cp + sizeof(*dh6o) + optlen)) == NULL)
+ goto trunc;
+ }
+ printf(")");
+ break;
+ case DH6OPT_STATUS_CODE:
+ if (optlen < 2) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ printf(" %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0])));
+ break;
+ case DH6OPT_IA_NA:
+ case DH6OPT_IA_PD:
+ if (optlen < 12) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ printf(" IAID:%u T1:%u T2:%u",
+ EXTRACT_32BITS(&tp[0]),
+ EXTRACT_32BITS(&tp[4]),
+ EXTRACT_32BITS(&tp[8]));
+ if (optlen > 12) {
+ /* there are sub-options */
+ dhcp6opt_print(tp + 12, tp + optlen);
+ }
+ printf(")");
+ break;
+ case DH6OPT_IA_TA:
+ if (optlen < 4) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ printf(" IAID:%u", EXTRACT_32BITS(tp));
+ if (optlen > 4) {
+ /* there are sub-options */
+ dhcp6opt_print(tp + 4, tp + optlen);
+ }
+ printf(")");
+ break;
+ case DH6OPT_IA_PD_PREFIX:
+ if (optlen < 25) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ printf(" %s/%d", ip6addr_string(&tp[9]), tp[8]);
+ printf(" pltime:%u vltime:%u",
+ EXTRACT_32BITS(&tp[0]),
+ EXTRACT_32BITS(&tp[4]));
+ if (optlen > 25) {
+ /* there are sub-options */
+ dhcp6opt_print(tp + 25, tp + optlen);
+ }
+ printf(")");
+ break;
+ case DH6OPT_LIFETIME:
+ case DH6OPT_CLT_TIME:
+ if (optlen != 4) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ printf(" %d)", EXTRACT_32BITS(tp));
+ break;
+ case DH6OPT_REMOTE_ID:
+ if (optlen < 4) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ printf(" %d ", EXTRACT_32BITS(tp));
+ /*
+ * Print hex dump first 10 characters.
+ */
+ for (i = 4; i < optlen && i < 14; i++)
+ printf("%02x", tp[i]);
+ printf("...)");
+ break;
+ case DH6OPT_LQ_QUERY:
+ if (optlen < 17) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ switch (*tp) {
+ case 1:
+ printf(" by-address");
+ break;
+ case 2:
+ printf(" by-clientID");
+ break;
+ default:
+ printf(" type_%d", (int)*tp);
+ break;
+ }
+ printf(" %s", ip6addr_string(&tp[1]));
+ if (optlen > 17) {
+ /* there are query-options */
+ dhcp6opt_print(tp + 17, tp + optlen);
+ }
+ printf(")");
+ break;
+ case DH6OPT_CLIENT_DATA:
+ tp = (u_char *)(dh6o + 1);
+ if (optlen > 0) {
+ /* there are encapsulated options */
+ dhcp6opt_print(tp, tp + optlen);
+ }
+ printf(")");
+ break;
+ case DH6OPT_LQ_RELAY_DATA:
+ if (optlen < 16) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ printf(" %s ", ip6addr_string(&tp[0]));
+ /*
+ * Print hex dump first 10 characters.
+ */
+ for (i = 16; i < optlen && i < 26; i++)
+ printf("%02x", tp[i]);
+ printf("...)");
+ break;
+ case DH6OPT_NTP_SERVER:
+ if (optlen < 4) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ while (tp < cp + sizeof(*dh6o) + optlen - 4) {
+ subopt_code = EXTRACT_16BITS(tp);
+ tp += 2;
+ subopt_len = EXTRACT_16BITS(tp);
+ tp += 2;
+ if (tp + subopt_len > cp + sizeof(*dh6o) + optlen)
+ goto trunc;
+ printf(" subopt:%d", subopt_code);
+ switch (subopt_code) {
+ case DH6OPT_NTP_SUBOPTION_SRV_ADDR:
+ case DH6OPT_NTP_SUBOPTION_MC_ADDR:
+ if (subopt_len != 16) {
+ printf(" ?");
+ break;
+ }
+ printf(" %s", ip6addr_string(&tp[0]));
+ break;
+ case DH6OPT_NTP_SUBOPTION_SRV_FQDN:
+ putchar(' ');
+ if (ns_nprint(tp, tp + subopt_len) == NULL)
+ goto trunc;
+ break;
+ default:
+ printf(" ?");
+ break;
+ }
+ tp += subopt_len;
+ }
+ printf(")");
+ break;
+ case DH6OPT_AFTR_NAME:
+ if (optlen < 3) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ remain_len = optlen;
+ printf(" ");
+ /* Encoding is described in section 3.1 of RFC 1035 */
+ while (remain_len && *tp) {
+ label_len = *tp++;
+ if (label_len < remain_len - 1) {
+ printf("%.*s", label_len, tp);
+ tp += label_len;
+ remain_len -= (label_len + 1);
+ if(*tp) printf(".");
+ } else {
+ printf(" ?");
+ break;
+ }
+ }
+ printf(")");
+ break;
default:
- printf(" (opt-%u)", ntohs(dh6o->dh6opt_type));
+ printf(")");
break;
}
* Print dhcp6 packets
*/
void
-dhcp6_print(register const u_char *cp, u_int length,
- u_int16_t sport, u_int16_t dport)
+dhcp6_print(const u_char *cp, u_int length)
{
struct dhcp6 *dh6;
- u_char *ep;
+ struct dhcp6_relay *dh6relay;
+ const u_char *ep;
u_char *extp;
const char *name;
printf("dhcp6");
ep = (u_char *)snapend;
+ if (cp + length < ep)
+ ep = cp + length;
dh6 = (struct dhcp6 *)cp;
- TCHECK(dh6->dh6_servaddr);
+ dh6relay = (struct dhcp6_relay *)cp;
+ TCHECK(dh6->dh6_xid);
switch (dh6->dh6_msgtype) {
+ case DH6_SOLICIT:
+ name = "solicit";
+ break;
+ case DH6_ADVERTISE:
+ name = "advertise";
+ break;
+ case DH6_REQUEST:
+ name = "request";
+ break;
+ case DH6_CONFIRM:
+ name = "confirm";
+ break;
+ case DH6_RENEW:
+ name = "renew";
+ break;
+ case DH6_REBIND:
+ name = "rebind";
+ break;
case DH6_REPLY:
name = "reply";
break;
+ case DH6_RELEASE:
+ name = "release";
+ break;
+ case DH6_DECLINE:
+ name = "decline";
+ break;
+ case DH6_RECONFIGURE:
+ name = "reconfigure";
+ break;
case DH6_INFORM_REQ:
name= "inf-req";
break;
+ case DH6_RELAY_FORW:
+ name= "relay-fwd";
+ break;
+ case DH6_RELAY_REPLY:
+ name= "relay-reply";
+ break;
+ case DH6_LEASEQUERY:
+ name= "leasequery";
+ break;
+ case DH6_LQ_REPLY:
+ name= "leasequery-reply";
+ break;
default:
name = NULL;
break;
if (!vflag) {
if (name)
printf(" %s", name);
- else
+ else if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
+ dh6->dh6_msgtype != DH6_RELAY_REPLY) {
printf(" msgtype-%u", dh6->dh6_msgtype);
+ }
return;
}
printf(" %s (", name); /*)*/
else
printf(" msgtype-%u (", dh6->dh6_msgtype); /*)*/
- printf("xid=%x", ntohl(dh6->dh6_xid) & DH6_XIDMASK);
- printf(" server=%s", ip6addr_string(&dh6->dh6_servaddr));
- extp = (u_char *)(dh6 + 1);
- dhcp6opt_print(extp, ep);
+ if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
+ dh6->dh6_msgtype != DH6_RELAY_REPLY) {
+ printf("xid=%x", EXTRACT_32BITS(&dh6->dh6_xid) & DH6_XIDMASK);
+ extp = (u_char *)(dh6 + 1);
+ dhcp6opt_print(extp, ep);
+ } else { /* relay messages */
+ struct in6_addr addr6;
+
+ TCHECK(dh6relay->dh6relay_peeraddr);
+
+ memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6));
+ printf("linkaddr=%s", ip6addr_string(&addr6));
+
+ memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6));
+ printf(" peeraddr=%s", ip6addr_string(&addr6));
+
+ dhcp6opt_print((u_char *)(dh6relay + 1), ep);
+ }
/*(*/
printf(")");
return;
projects / tcpdump / blobdiff