* SUCH DAMAGE.
*/
/*
- * draft-ietf-dhc-dhcpv6-26.txt
+ * RFC3315: DHCPv6
+ * supported DHCPv6 options:
+ * RFC3319,
+ * draft-ietf-dhc-dhcpv6-opt-dnsconfig-04.txt,
+ * draft-ietf-dhc-dhcpv6-opt-prefix-delegation-05.txt
+ * draft-ietf-dhc-dhcpv6-opt-timeconfig-02.txt,
*/
#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.23 2002-12-11 07:13:59 guy Exp $";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.27 2003-10-29 03:54:14 itojun Exp $";
#endif
#ifdef HAVE_CONFIG_H
#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 {
#define dh6_xid dh6_msgtypexid.x
#define DH6_XIDMASK 0x00ffffff
-/* option */
+/* 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 3
+#define DH6OPT_IA_NA 3
#define DH6OPT_IA_TMP 4
#define DH6OPT_IADDR 5
#define DH6OPT_ORO 6
# define DH6OPT_PREF_UNDEF -1
# define DH6OPT_PREF_MAX 255
#define DH6OPT_ELAPSED_TIME 8
-#define DH6OPT_CLIENT_MSG 9
-#define DH6OPT_SERVER_MSG 10
+#define DH6OPT_RELAY_MSG 9
+/*#define DH6OPT_SERVER_MSG 10 deprecated */
#define DH6OPT_AUTH 11
#define DH6OPT_UNICAST 12
#define DH6OPT_STATUS_CODE 13
# define DH6OPT_STCODE_SUCCESS 0
# define DH6OPT_STCODE_UNSPECFAIL 1
-# define DH6OPT_STCODE_AUTHFAILED 2
-# define DH6OPT_STCODE_ADDRUNAVAIL 3
-# define DH6OPT_STCODE_NOADDRAVAIL 4
-# define DH6OPT_STCODE_NOBINDING 5
-# define DH6OPT_STCODE_CONFNOMATCH 6
-# define DH6OPT_STCODE_NOTONLINK 7
-# define DH6OPT_STCODE_USEMULTICAST 8
+# 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
/*
* The option type has not been assigned for the following options.
* Note that we'll change the following definitions if different type values
* are officially assigned.
*/
-#define DH6OPT_DNS 25
#define DH6OPT_PREFIX_DELEGATION 30
#define DH6OPT_PREFIX_INFORMATION 31
#define DH6OPT_PREFIX_REQUEST 32
+/*
+ * The followings are also unassigned numbers.
+ * We temporarily use values as of KAME snap 20031013.
+ */
+#define DH6OPT_IA_PD 33
+#define DH6OPT_IA_PD_PREFIX 34
+#define DH6OPT_NTP_SERVERS 35
+
struct dhcp6opt {
u_int16_t dh6opt_type;
u_int16_t dh6opt_len;
/* type-dependent data follows */
};
-static char *
+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;
+};
+
+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__));
+
+static const char *
dhcp6opt_name(int type)
{
static char genstr[sizeof("opt_65535") + 1]; /* XXX thread unsafe */
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_STATUS_CODE:
return "status code";
case DH6OPT_RAPID_COMMIT:
return "rapid commit";
+ 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_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";
default:
- sprintf(genstr, "opt_%d", type);
+ snprintf(genstr, sizeof(genstr), "opt_%d", type);
return(genstr);
}
}
-static char *
+static const char *
dhcp6stcode(int code)
{
static char genstr[sizeof("code255") + 1]; /* XXX thread unsafe */
return "success";
case DH6OPT_STCODE_UNSPECFAIL:
return "unspec failure";
- case DH6OPT_STCODE_AUTHFAILED:
- return "auth fail";
- case DH6OPT_STCODE_ADDRUNAVAIL:
- return "address unavailable";
case DH6OPT_STCODE_NOADDRAVAIL:
return "no addresses";
case DH6OPT_STCODE_NOBINDING:
return "no binding";
- case DH6OPT_STCODE_CONFNOMATCH:
- return "confirm no match";
case DH6OPT_STCODE_NOTONLINK:
return "not on-link";
case DH6OPT_STCODE_USEMULTICAST:
return "use multicast";
+ case DH6OPT_STCODE_NOPREFIXAVAIL:
+ return "no prefixes";
default:
- sprintf(genstr, "code%d", code);
+ 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, opttype;
+ 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;
if (cp == ep)
return;
while (cp < ep) {
- if (ep - cp < sizeof(*dh6o))
+ if (ep < cp + sizeof(*dh6o))
goto trunc;
dh6o = (struct dhcp6opt *)cp;
optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
- if (ep - cp < sizeof(*dh6o) + optlen)
+ if (ep < cp + sizeof(*dh6o) + optlen)
goto trunc;
opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
printf(" (%s", dhcp6opt_name(opttype));
}
printf(" %d)", *((u_char *)(dh6o + 1) + 1));
break;
+ 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, 0, 0);
+ printf(")");
+ break;
case DH6OPT_RAPID_COMMIT: /* nothing todo */
printf(")");
break;
+ 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;
+ 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:
+ case DH6OPT_NTP_SERVERS:
if (optlen % 16) {
printf(" ?)");
break;
printf(" lease-duration: %u)", val32);
break;
case DH6OPT_STATUS_CODE:
- if (optlen < 2)
+ 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;
default:
printf(")");
break;
* Print dhcp6 packets
*/
void
-dhcp6_print(register const u_char *cp, u_int length,
+dhcp6_print(const u_char *cp, u_int length,
u_int16_t sport, u_int16_t dport)
{
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;
+ dh6relay = (struct dhcp6_relay *)cp;
TCHECK(dh6->dh6_xid);
switch (dh6->dh6_msgtype) {
case DH6_SOLICIT:
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;
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", EXTRACT_32BITS(&dh6->dh6_xid) & DH6_XIDMASK);
- 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