*/
/*
* RFC3315: DHCPv6
- * supported DHCPv6 options:
- * RFC3319,
- * RFC3633,
- * RFC3646,
- * RFC3898,
- * RFC4075,
- * RFC4242,
- * RFC4280,
+ * 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[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.37 2008-02-06 10:26:09 guy Exp $";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "extract.h"
/* lease duration */
-#define DHCP6_DURATITION_INFINITE 0xffffffff
+#define DHCP6_DURATION_INFINITE 0xffffffff
/* Error Values */
#define DH6ERR_FAILURE 16
#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_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_NTP_SERVERS 31
+#define DH6OPT_SNTP_SERVERS 31
#define DH6OPT_LIFETIME 32
#define DH6OPT_BCMCS_SERVER_D 33
#define DH6OPT_BCMCS_SERVER_A 34
#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;
return "SIP-servers-domain";
case DH6OPT_SIP_SERVER_A:
return "SIP-servers-address";
- case DH6OPT_DNS:
+ case DH6OPT_DNS_SERVERS:
return "DNS-server";
- case DH6OPT_DNSNAME:
+ 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_NTP_SERVERS:
- return "NTP-server";
+ case DH6OPT_SNTP_SERVERS:
+ return "SNTP-servers";
case DH6OPT_LIFETIME:
return "lifetime";
case DH6OPT_NIS_SERVERS:
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 void
dhcp6opt_print(const u_char *cp, const u_char *ep)
{
- struct dhcp6opt *dh6o;
- u_char *tp;
+ 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;
if (ep < cp + sizeof(*dh6o))
goto trunc;
dh6o = (struct dhcp6opt *)cp;
+ TCHECK(*dh6o);
optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
if (ep < cp + sizeof(*dh6o) + optlen)
goto trunc;
EXTRACT_32BITS(&tp[20]));
if (optlen > 24) {
/* there are sub-options */
- dhcp6opt_print(tp + 24, tp + 24 + optlen);
+ dhcp6opt_print(tp + 24, tp + optlen);
}
printf(")");
break;
printf(")");
break;
case DH6OPT_SIP_SERVER_A:
- case DH6OPT_DNS:
- case DH6OPT_NTP_SERVERS:
+ case DH6OPT_DNS_SERVERS:
+ case DH6OPT_SNTP_SERVERS:
case DH6OPT_NIS_SERVERS:
case DH6OPT_NISP_SERVERS:
case DH6OPT_BCMCS_SERVER_A:
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(" ?)");
EXTRACT_32BITS(&tp[8]));
if (optlen > 12) {
/* there are sub-options */
- dhcp6opt_print(tp + 12, tp + 12 + optlen);
+ dhcp6opt_print(tp + 12, tp + optlen);
}
printf(")");
break;
printf(" IAID:%u", EXTRACT_32BITS(tp));
if (optlen > 4) {
/* there are sub-options */
- dhcp6opt_print(tp + 4, tp + 4 + optlen);
+ dhcp6opt_print(tp + 4, tp + optlen);
}
printf(")");
break;
EXTRACT_32BITS(&tp[4]));
if (optlen > 25) {
/* there are sub-options */
- dhcp6opt_print(tp + 25, tp + 25 + optlen);
+ dhcp6opt_print(tp + 25, tp + optlen);
}
printf(")");
break;
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(")");
break;
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