/*
* 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
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
+/*
+ * RFC3315: DHCPv6
+ * supported DHCPv6 options:
+ * RFC3319,
+ * RFC3633,
+ * RFC3646,
+ * draft-ietf-dhc-dhcpv6-opt-timeconfig-03.txt,
+ * draft-ietf-dhc-lifetime-00.txt,
+ */
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.7 2000-05-15 04:29:32 itojun Exp $";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.35 2004-07-06 22:16:03 guy Exp $";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-#if __STDC__
-struct mbuf;
-struct rtentry;
-#endif
-#include <net/if.h>
+#include <tcpdump-stdinc.h>
-#include <netinet/in.h>
-
-#include <ctype.h>
-#ifdef HAVE_MEMORY_H
-#include <memory.h>
-#endif
#include <stdio.h>
#include <string.h>
-#include <arpa/inet.h>
#include "interface.h"
#include "addrtoname.h"
-#include "dhcp6.h"
-#include "dhcp6opt.h"
-
-#if 0
-static void dhcp6opttab_init __P((void));
-static struct dhcp6_opt *dhcp6opttab_byname __P((char *));
-#endif
-static struct dhcp6_opt *dhcp6opttab_bycode __P((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_DURATITION_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
+
+/* DHCP6 base packet format */
+struct dhcp6 {
+ union {
+ u_int8_t m;
+ u_int32_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 {
+ 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 */
};
-#if 0
-static struct dhcp6_opt *dh6o_pad;
-static struct dhcp6_opt *dh6o_end;
+/* options */
+#define DH6OPT_CLIENTID 1
+#define DH6OPT_SERVERID 2
+#define DH6OPT_IA_NA 3
+#define DH6OPT_IA_TMP 4
+#define DH6OPT_IADDR 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_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 23
+#define DH6OPT_DNSNAME 24
+#define DH6OPT_IA_PD 25
+#define DH6OPT_IA_PD_PREFIX 26
-static void
-dhcp6opttab_init()
-{
- dh6o_pad = dhcp6opttab_bycode(0);
- dh6o_end = dhcp6opttab_bycode(65536);
-}
-#endif
+/*
+ * The old prefix delegation option used in the service specification document
+ * (200206xx version) by NTT Communications.
+ */
+#define DH6OPT_PREFIX_DELEGATION 30
+#define DH6OPT_PREFIX_INFORMATION 31
+#define DH6OPT_PREFIX_REQUEST 32
-#if 0
-static struct dhcp6_opt *
-dhcp6opttab_byname(name)
- char *name;
-{
- struct dhcp6_opt *p;
+/*
+ * The following one is an unassigned number.
+ * We temporarily use values as of KAME snap 20040322.
+ */
+#define DH6OPT_NTP_SERVERS 35
+#define DH6OPT_LIFETIME 36
- for (p = dh6opttab; p->code; p++)
- if (strcmp(name, p->name) == 0)
- return p;
- return NULL;
-}
-#endif
+struct dhcp6opt {
+ u_int16_t dh6opt_type;
+ u_int16_t dh6opt_len;
+ /* type-dependent data follows */
+};
+
+struct dhcp6_ia {
+ u_int16_t dh6opt_ia_type;
+ u_int16_t dh6opt_ia_len;
+ u_int32_t dh6opt_ia_iaid;
+ u_int32_t dh6opt_ia_t1;
+ u_int32_t dh6opt_ia_t2;
+};
-static struct dhcp6_opt *
-dhcp6opttab_bycode(code)
- u_int code;
+struct dhcp6_ia_prefix {
+ u_int16_t dh6opt_ia_prefix_type;
+ u_int16_t dh6opt_ia_prefix_len;
+ u_int32_t dh6opt_ia_prefix_pltime;
+ u_int32_t dh6opt_ia_prefix_vltime;
+ u_int8_t dh6opt_ia_prefix_plen;
+ struct in6_addr dh6opt_ia_prefix_addr;
+} __attribute__ ((__packed__));
+
+struct dhcp6_auth {
+ u_int16_t dh6opt_auth_type;
+ u_int16_t dh6opt_auth_len;
+ u_int8_t dh6opt_auth_proto;
+ u_int8_t dh6opt_auth_alg;
+ u_int8_t dh6opt_auth_rdm;
+ u_int8_t dh6opt_auth_rdinfo[8];
+ /* authentication information follows */
+} __attribute__ ((__packed__));
+
+static const char *
+dhcp6opt_name(int type)
{
- struct dhcp6_opt *p;
+ 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_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";
+ case DH6OPT_DNSNAME:
+ return "DNS name";
+ case DH6OPT_PREFIX_DELEGATION:
+ return "prefix delegation";
+ case DH6OPT_PREFIX_INFORMATION:
+ return "prefix information";
+ 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";
+ default:
+ snprintf(genstr, sizeof(genstr), "opt_%d", type);
+ return(genstr);
+ }
+}
- for (p = dh6opttab; p->code; p++)
- if (p->code == code)
- return p;
- return NULL;
+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";
+ default:
+ snprintf(genstr, sizeof(genstr), "code%d", code);
+ return(genstr);
+ }
}
static void
-dhcp6ext_print(u_char *cp, u_char *ep)
+dhcp6opt_print(const u_char *cp, const u_char *ep)
{
- u_int16_t code, len;
- struct dhcp6_opt *p;
- char buf[BUFSIZ];
- int i;
+ struct dhcp6opt *dh6o;
+ u_char *tp;
+ size_t i;
+ u_int16_t opttype;
+ size_t optlen;
+ u_int16_t val16;
+ u_int32_t val32;
+ struct in6_addr addr6;
+ struct dhcp6_ia ia;
+ struct dhcp6_ia_prefix ia_prefix;
+ struct dhcp6_auth authopt;
+ u_int authinfolen, authrealmlen;
if (cp == ep)
return;
- printf(" ");
while (cp < ep) {
- if (ep - cp < sizeof(u_int16_t))
+ if (ep < cp + sizeof(*dh6o))
+ goto trunc;
+ dh6o = (struct dhcp6opt *)cp;
+ 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));
+ switch (opttype) {
+ case DH6OPT_CLIENTID:
+ case DH6OPT_SERVERID:
+ if (optlen < 2) {
+ /*(*/
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ switch (EXTRACT_16BITS(tp)) {
+ case 1:
+ if (optlen >= 2 + 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(" ?)");
+ }
+ break;
+ case 2:
+ if (optlen >= 2 + 8) {
+ printf(" vid ");
+ for (i = 2; i < 2 + 8; i++)
+ printf("%02x", tp[i]);
+ /*(*/
+ printf(")");
+ } else {
+ /*(*/
+ printf(" ?)");
+ }
+ break;
+ case 3:
+ if (optlen >= 2 + 2) {
+ printf(" hwaddr type %u ",
+ EXTRACT_16BITS(&tp[2]));
+ for (i = 4; i < optlen; i++)
+ printf("%02x", tp[i]);
+ /*(*/
+ printf(")");
+ } else {
+ /*(*/
+ printf(" ?)");
+ }
+ break;
+ default:
+ printf(" type %d)", EXTRACT_16BITS(tp));
+ break;
+ }
break;
- code = ntohs(*(u_int16_t *)&cp[0]);
- if (ep - cp < sizeof(u_int16_t) * 2)
+ case DH6OPT_ORO:
+ if (optlen % 2) {
+ printf(" ?)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ for (i = 0; i < optlen; i += 2) {
+ u_int16_t opt;
+
+ memcpy(&opt, &tp[i], sizeof(opt));
+ printf(" %s", dhcp6opt_name(ntohs(opt)));
+ }
+ printf(")");
break;
- if (code != 65535)
- len = ntohs(*(u_int16_t *)&cp[2]);
- else
- len = 0;
- if (ep - cp < len + 4)
+ case DH6OPT_PREFERENCE:
+ if (optlen != 1) {
+ printf(" ?)");
+ break;
+ }
+ printf(" %d)", *((u_char *)(dh6o + 1) + 1));
break;
- p = dhcp6opttab_bycode(code);
- if (p == NULL) {
- printf("(unknown, len=%d)", len);
- cp += len + 4;
- continue;
- }
+ case DH6OPT_ELAPSED_TIME:
+ if (optlen != 2) {
+ printf(" ?)");
+ break;
+ }
+ memcpy(&val16, dh6o + 1, sizeof(val16));
+ val16 = ntohs(val16);
+ printf(" %d)", (int)val16);
+ break;
+ case DH6OPT_RELAY_MSG:
+ printf(" (");
+ dhcp6_print((const u_char *)(dh6o + 1), optlen);
+ printf(")");
+ break;
+ case DH6OPT_AUTH:
+ if (optlen < sizeof(authopt) - sizeof(*dh6o)) {
+ printf(" ?)");
+ break;
+ }
+ memcpy(&authopt, dh6o, sizeof(authopt));
+ switch (authopt.dh6opt_auth_proto) {
+ case DH6OPT_AUTHPROTO_DELAYED:
+ printf(" proto: delayed");
+ break;
+ case DH6OPT_AUTHPROTO_RECONFIG:
+ printf(" proto: reconfigure");
+ break;
+ default:
+ printf(" proto: %d",
+ authopt.dh6opt_auth_proto);
+ break;
+ }
+ switch (authopt.dh6opt_auth_alg) {
+ case DH6OPT_AUTHALG_HMACMD5:
+ /* XXX: may depend on the protocol */
+ printf(", alg: HMAC-MD5");
+ break;
+ default:
+ printf(", alg: %d", authopt.dh6opt_auth_alg);
+ break;
+ }
+ switch (authopt.dh6opt_auth_rdm) {
+ case DH6OPT_AUTHRDM_MONOCOUNTER:
+ printf(", RDM: mono");
+ break;
+ default:
+ printf(", RDM: %d", authopt.dh6opt_auth_rdm);
+ break;
+ }
+ tp = (u_char *)&authopt.dh6opt_auth_rdinfo;
+ printf(", RD:");
+ for (i = 0; i < 4; i++, tp += sizeof(val16))
+ printf(" %04x", EXTRACT_16BITS(tp));
+
+ /* protocol dependent part */
+ tp = (u_char *)dh6o + sizeof(authopt);
+ authinfolen =
+ optlen + sizeof(*dh6o) - sizeof(authopt);
+ switch (authopt.dh6opt_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;
+ }
- /* sanity check on length */
- switch (p->len) {
- case OL6_N:
+ printf(")");
break;
- case OL6_16N:
- if (len % 16 != 0)
- goto trunc;
+ case DH6OPT_RAPID_COMMIT: /* nothing todo */
+ printf(")");
break;
- case OL6_Z:
- if (len != 0)
- goto trunc;
+ case DH6OPT_INTERFACE_ID:
+ /*
+ * Since we cannot predict the encoding, print hex dump
+ * at most 10 characters.
+ */
+ for (i = 0; i < optlen && i < 10; i++)
+ printf("%02x", ((u_char *)(dh6o + 1))[i]);
break;
- default:
- if (len != p->len)
- goto trunc;
+ 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;
- }
- 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 */
+ printf(")");
+ break;
+ case DH6OPT_SIP_SERVER_A:
+ case DH6OPT_DNS:
+ case DH6OPT_NTP_SERVERS:
+ 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 OT6_STR:
- memset(&buf, 0, sizeof(buf));
- strncpy(buf, &cp[4], len);
- printf("%s", buf);
+ case DH6OPT_PREFIX_DELEGATION:
+ dhcp6opt_print((u_char *)(dh6o + 1),
+ (u_char *)(dh6o + 1) + optlen);
+ printf(")");
+ break;
+ case DH6OPT_PREFIX_INFORMATION:
+ if (optlen % 21)
+ printf(" ?)");
+ memcpy(&addr6, (u_char *)(dh6o + 1) + 5,
+ sizeof(addr6));
+ printf(" %s/%d", ip6addr_string(&addr6),
+ (int)*((u_char *)(dh6o + 1) + 4));
+ memcpy(&val32, dh6o + 1, sizeof(val32));
+ val32 = ntohl(val32);
+ if (val32 == DHCP6_DURATITION_INFINITE)
+ printf(" lease-duration: infinite)");
+ else
+ printf(" lease-duration: %u)", val32);
break;
- case OT6_NUM:
- printf("%d", (u_int32_t)ntohl(*(u_int32_t *)&cp[4]));
+ case DH6OPT_STATUS_CODE:
+ if (optlen < 2) {
+ printf(" ?)");
+ break;
+ }
+ memcpy(&val16, (u_char *)(dh6o + 1), sizeof(val16));
+ val16 = ntohs(val16);
+ printf(" %s)", dhcp6stcode(val16));
+ break;
+ case DH6OPT_IA_NA:
+ case DH6OPT_IA_PD:
+ if (optlen < sizeof(ia) - 4) {
+ printf(" ?)");
+ break;
+ }
+ memcpy(&ia, (u_char *)dh6o, sizeof(ia));
+ ia.dh6opt_ia_iaid = ntohl(ia.dh6opt_ia_iaid);
+ ia.dh6opt_ia_t1 = ntohl(ia.dh6opt_ia_t1);
+ ia.dh6opt_ia_t2 = ntohl(ia.dh6opt_ia_t2);
+ printf(" IAID:%lu T1:%lu T2:%lu",
+ (unsigned long)ia.dh6opt_ia_iaid,
+ (unsigned long)ia.dh6opt_ia_t1,
+ (unsigned long)ia.dh6opt_ia_t2);
+ if (optlen > sizeof(ia) - 4) {
+ /* there are sub-options */
+ dhcp6opt_print((u_char *)dh6o + sizeof(ia),
+ (u_char *)(dh6o + 1) + optlen);
+ }
+ printf(")");
+ break;
+ case DH6OPT_IA_PD_PREFIX:
+ if (optlen < sizeof(ia_prefix) - 4) {
+ printf(" ?)");
+ break;
+ }
+ memcpy(&ia_prefix, (u_char *)dh6o, sizeof(ia_prefix));
+ printf(" %s/%d",
+ ip6addr_string(&ia_prefix.dh6opt_ia_prefix_addr),
+ ia_prefix.dh6opt_ia_prefix_plen);
+ ia_prefix.dh6opt_ia_prefix_pltime =
+ ntohl(ia_prefix.dh6opt_ia_prefix_pltime);
+ ia_prefix.dh6opt_ia_prefix_vltime =
+ ntohl(ia_prefix.dh6opt_ia_prefix_vltime);
+ printf(" pltime:%lu vltime:%lu",
+ (unsigned long)ia_prefix.dh6opt_ia_prefix_pltime,
+ (unsigned long)ia_prefix.dh6opt_ia_prefix_vltime);
+ if (optlen > sizeof(ia_prefix) - 4) {
+ /* there are sub-options */
+ dhcp6opt_print((u_char *)dh6o +
+ sizeof(ia_prefix),
+ (u_char *)(dh6o + 1) + optlen);
+ }
+ printf(")");
+ break;
+ case DH6OPT_LIFETIME:
+ if (optlen != 4) {
+ printf(" ?)");
+ break;
+ }
+ memcpy(&val32, dh6o + 1, sizeof(val32));
+ val32 = ntohl(val32);
+ printf(" %d)", (int)val32);
break;
default:
- for (i = 0; i < len; i++)
- printf("%02x", cp[4 + i] & 0xff);
+ printf(")");
+ break;
}
- printf(")");
- cp += len + 4;
+
+ cp += sizeof(*dh6o) + optlen;
}
return;
}
/*
- * 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(const u_char *cp, u_int length)
{
- union dhcp6 *dh6;
- u_char *ep;
+ struct dhcp6 *dh6;
+ struct dhcp6_relay *dh6relay;
+ const u_char *ep;
u_char *extp;
- u_int16_t field16;
+ const char *name;
printf("dhcp6");
ep = (u_char *)snapend;
+ if (cp + length < ep)
+ ep = cp + length;
- dh6 = (union dhcp6 *)cp;
- TCHECK(dh6->dh6_msgtype);
+ dh6 = (struct dhcp6 *)cp;
+ dh6relay = (struct dhcp6_relay *)cp;
+ TCHECK(dh6->dh6_xid);
switch (dh6->dh6_msgtype) {
case DH6_SOLICIT:
- if (vflag && TTEST(dh6->dh6_sol.dh6sol_relayaddr)) {
- 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" : "");
- }
-
- memcpy(&field16, &dh6->dh6_sol.dh6sol_plen_id,
- sizeof(field16));
- field16 = ntohs(field16);
- if (field16 & ~DH6SOL_SOLICIT_ID_MASK)
- printf("plen=%d ",
- (0xff & (field16 &
- ~DH6SOL_SOLICIT_ID_MASK)>>9));
- printf("solicit-ID=%d",
- field16 & DH6SOL_SOLICIT_ID_MASK);
-
- printf(" cliaddr=%s",
- ip6addr_string(&dh6->dh6_sol.dh6sol_cliaddr));
- printf(" relayaddr=%s",
- ip6addr_string(&dh6->dh6_sol.dh6sol_relayaddr));
- printf(")");
- } else
- printf(" solicit");
+ name = "solicit";
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(")");
+ case DH6_ADVERTISE:
+ name = "advertise";
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(")");
+ name = "request";
+ break;
+ case DH6_CONFIRM:
+ name = "confirm";
+ break;
+ case DH6_RENEW:
+ name = "renew";
+ break;
+ case DH6_REBIND:
+ name = "rebind";
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(")");
+ name = "reply";
break;
case DH6_RELEASE:
- printf(" 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_RECONFIG:
- printf(" reconfig");
+ case DH6_RELAY_REPLY:
+ name= "relay-reply";
break;
+ default:
+ name = NULL;
+ break;
+ }
+
+ 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);
+ }
+ return;
+ }
+
+ /* XXX relay agent messages have to be handled differently */
+
+ if (name)
+ printf(" %s (", name); /*)*/
+ else
+ printf(" msgtype-%u (", dh6->dh6_msgtype); /*)*/
+ 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;
trunc:
- printf("%s", tstr);
+ printf("[|dhcp6]");
}
projects / tcpdump / blobdiff