static void
dhcp6opt_print(const u_char *cp, const u_char *ep)
{
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 dhcp6_ia ia;
struct dhcp6_ia_prefix ia_prefix;
struct dhcp6_ia_addr ia_addr;
struct dhcp6_auth authopt;
u_int authinfolen, authrealmlen;
if (cp == ep)
return;
while (cp < ep) {
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;
case DH6OPT_IA_ADDR:
if (optlen < sizeof(ia_addr) - 4) {
printf(" ?)");
break;
}
memcpy(&ia_addr, (u_char *)dh6o, sizeof(ia_addr));
printf(" %s",
ip6addr_string(&ia_addr.dh6opt_ia_addr_addr));
ia_addr.dh6opt_ia_addr_pltime =
ntohl(ia_addr.dh6opt_ia_addr_pltime);
ia_addr.dh6opt_ia_addr_vltime =
ntohl(ia_addr.dh6opt_ia_addr_vltime);
printf(" pltime:%lu vltime:%lu",
(unsigned long)ia_addr.dh6opt_ia_addr_pltime,
(unsigned long)ia_addr.dh6opt_ia_addr_vltime);
if (optlen > sizeof(ia_addr) - 4) {
/* there are sub-options */
dhcp6opt_print((u_char *)dh6o +
sizeof(ia_addr),
(u_char *)(dh6o + 1) + optlen);
}
printf(")");
break;
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;
case DH6OPT_PREFERENCE:
if (optlen != 1) {
printf(" ?)");
break;
}
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);
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;
}
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:
case DH6OPT_NIS_SERVERS:
case DH6OPT_NISP_SERVERS:
case DH6OPT_BCMCS_SERVER_A:
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_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:
printf(")");
break;
}
cp += sizeof(*dh6o) + optlen;
}
return;
trunc:
printf("[|dhcp6ext]");
}
static void
dhcp6opt_print(netdissect_options *ndo,
const u_char *cp, const u_char *ep)
{
const struct dhcp6opt *dh6o;
const u_char *tp;
u_int i;
uint16_t opttype;
uint16_t optlen;
uint8_t auth_proto;
uint8_t auth_alg;
uint8_t auth_rdm;
u_int authinfolen, authrealmlen;
u_int remain_len; /* Length of remaining options */
u_int label_len; /* Label length */
uint16_t subopt_code;
uint16_t subopt_len;
uint8_t dh6_reconf_type;
uint8_t dh6_lq_query_type;
if (cp == ep)
return;
while (cp < ep) {
if (ep < cp + sizeof(*dh6o))
goto trunc;
dh6o = (const struct dhcp6opt *)cp;
ND_TCHECK_SIZE(dh6o);
optlen = EXTRACT_BE_U_2(dh6o->dh6opt_len);
if (ep < cp + sizeof(*dh6o) + optlen)
goto trunc;
opttype = EXTRACT_BE_U_2(dh6o->dh6opt_type);
ND_PRINT(" (%s", tok2str(dh6opt_str, "opt_%u", opttype));
ND_TCHECK_LEN(cp + sizeof(*dh6o), optlen);
switch (opttype) {
case DH6OPT_CLIENTID:
case DH6OPT_SERVERID:
if (optlen < 2) {
/*(*/
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
switch (EXTRACT_BE_U_2(tp)) {
case 1:
if (optlen >= 2 + 6) {
ND_PRINT(" hwaddr/time type %u time %u ",
EXTRACT_BE_U_2(tp + 2),
EXTRACT_BE_U_4(tp + 4));
for (i = 8; i < optlen; i++)
ND_PRINT("%02x", EXTRACT_U_1(tp + i));
/*(*/
ND_PRINT(")");
} else {
/*(*/
ND_PRINT(" ?)");
}
break;
case 2:
if (optlen >= 2 + 8) {
ND_PRINT(" vid ");
for (i = 2; i < 2 + 8; i++)
ND_PRINT("%02x", EXTRACT_U_1(tp + i));
/*(*/
ND_PRINT(")");
} else {
/*(*/
ND_PRINT(" ?)");
}
break;
case 3:
if (optlen >= 2 + 2) {
ND_PRINT(" hwaddr type %u ",
EXTRACT_BE_U_2(tp + 2));
for (i = 4; i < optlen; i++)
ND_PRINT("%02x", EXTRACT_U_1(tp + i));
/*(*/
ND_PRINT(")");
} else {
/*(*/
ND_PRINT(" ?)");
}
break;
default:
ND_PRINT(" type %u)", EXTRACT_BE_U_2(tp));
break;
}
break;
case DH6OPT_IA_ADDR:
if (optlen < 24) {
/*(*/
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT(" %s", ip6addr_string(ndo, tp));
ND_PRINT(" pltime:%u vltime:%u",
EXTRACT_BE_U_4(tp + 16),
EXTRACT_BE_U_4(tp + 20));
if (optlen > 24) {
/* there are sub-options */
dhcp6opt_print(ndo, tp + 24, tp + optlen);
}
ND_PRINT(")");
break;
case DH6OPT_ORO:
case DH6OPT_ERO:
if (optlen % 2) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
for (i = 0; i < optlen; i += 2) {
ND_PRINT(" %s",
tok2str(dh6opt_str, "opt_%u", EXTRACT_BE_U_2(tp + i)));
}
ND_PRINT(")");
break;
case DH6OPT_PREFERENCE:
if (optlen != 1) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT(" %u)", EXTRACT_U_1(tp));
break;
case DH6OPT_ELAPSED_TIME:
if (optlen != 2) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT(" %u)", EXTRACT_BE_U_2(tp));
break;
case DH6OPT_RELAY_MSG:
ND_PRINT(" (");
tp = (const u_char *)(dh6o + 1);
dhcp6_print(ndo, tp, optlen);
ND_PRINT(")");
break;
case DH6OPT_AUTH:
if (optlen < 11) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
auth_proto = EXTRACT_U_1(tp);
switch (auth_proto) {
case DH6OPT_AUTHPROTO_DELAYED:
ND_PRINT(" proto: delayed");
break;
case DH6OPT_AUTHPROTO_RECONFIG:
ND_PRINT(" proto: reconfigure");
break;
default:
ND_PRINT(" proto: %u", auth_proto);
break;
}
tp++;
auth_alg = EXTRACT_U_1(tp);
switch (auth_alg) {
case DH6OPT_AUTHALG_HMACMD5:
/* XXX: may depend on the protocol */
ND_PRINT(", alg: HMAC-MD5");
break;
default:
ND_PRINT(", alg: %u", auth_alg);
break;
}
tp++;
auth_rdm = EXTRACT_U_1(tp);
switch (auth_rdm) {
case DH6OPT_AUTHRDM_MONOCOUNTER:
ND_PRINT(", RDM: mono");
break;
default:
ND_PRINT(", RDM: %u", auth_rdm);
break;
}
tp++;
ND_PRINT(", RD:");
for (i = 0; i < 4; i++, tp += 2)
ND_PRINT(" %04x", EXTRACT_BE_U_2(tp));
/* protocol dependent part */
authinfolen = optlen - 11;
switch (auth_proto) {
case DH6OPT_AUTHPROTO_DELAYED:
if (authinfolen == 0)
break;
if (authinfolen < 20) {
ND_PRINT(" ??");
break;
}
authrealmlen = authinfolen - 20;
if (authrealmlen > 0) {
ND_PRINT(", realm: ");
}
for (i = 0; i < authrealmlen; i++, tp++)
ND_PRINT("%02x", EXTRACT_U_1(tp));
ND_PRINT(", key ID: %08x", EXTRACT_BE_U_4(tp));
tp += 4;
ND_PRINT(", HMAC-MD5:");
for (i = 0; i < 4; i++, tp+= 4)
ND_PRINT(" %08x", EXTRACT_BE_U_4(tp));
break;
case DH6OPT_AUTHPROTO_RECONFIG:
if (authinfolen != 17) {
ND_PRINT(" ??");
break;
}
switch (EXTRACT_U_1(tp)) {
case DH6OPT_AUTHRECONFIG_KEY:
ND_PRINT(" reconfig-key");
break;
case DH6OPT_AUTHRECONFIG_HMACMD5:
ND_PRINT(" type: HMAC-MD5");
break;
default:
ND_PRINT(" type: ??");
break;
}
tp++;
ND_PRINT(" value:");
for (i = 0; i < 4; i++, tp+= 4)
ND_PRINT(" %08x", EXTRACT_BE_U_4(tp));
break;
default:
ND_PRINT(" ??");
break;
}
ND_PRINT(")");
break;
case DH6OPT_RAPID_COMMIT: /* nothing todo */
ND_PRINT(")");
break;
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(" ");
for (i = 0; i < optlen && i < 10; i++)
ND_PRINT("%02x", EXTRACT_U_1(tp + i));
ND_PRINT("...)");
break;
case DH6OPT_RECONF_MSG:
if (optlen != 1) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
dh6_reconf_type = EXTRACT_U_1(tp);
switch (dh6_reconf_type) {
case DH6_RENEW:
ND_PRINT(" for renew)");
break;
case DH6_INFORM_REQ:
ND_PRINT(" for inf-req)");
break;
default:
ND_PRINT(" for ?\?\?(%02x))", dh6_reconf_type);
break;
}
break;
case DH6OPT_RECONF_ACCEPT: /* nothing todo */
ND_PRINT(")");
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(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
for (i = 0; i < optlen; i += 16)
ND_PRINT(" %s", ip6addr_string(ndo, tp + i));
ND_PRINT(")");
break;
case DH6OPT_SIP_SERVER_D:
case DH6OPT_DOMAIN_LIST:
tp = (const u_char *)(dh6o + 1);
while (tp < cp + sizeof(*dh6o) + optlen) {
ND_PRINT(" ");
if ((tp = ns_nprint(ndo, tp, cp + sizeof(*dh6o) + optlen)) == NULL)
goto trunc;
}
ND_PRINT(")");
break;
case DH6OPT_STATUS_CODE:
if (optlen < 2) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT(" %s)", dhcp6stcode(EXTRACT_BE_U_2(tp)));
break;
case DH6OPT_IA_NA:
case DH6OPT_IA_PD:
if (optlen < 12) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT(" IAID:%u T1:%u T2:%u",
EXTRACT_BE_U_4(tp),
EXTRACT_BE_U_4(tp + 4),
EXTRACT_BE_U_4(tp + 8));
if (optlen > 12) {
/* there are sub-options */
dhcp6opt_print(ndo, tp + 12, tp + optlen);
}
ND_PRINT(")");
break;
case DH6OPT_IA_TA:
if (optlen < 4) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT(" IAID:%u", EXTRACT_BE_U_4(tp));
if (optlen > 4) {
/* there are sub-options */
dhcp6opt_print(ndo, tp + 4, tp + optlen);
}
ND_PRINT(")");
break;
case DH6OPT_IA_PD_PREFIX:
if (optlen < 25) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT(" %s/%u", ip6addr_string(ndo, tp + 9), EXTRACT_U_1(tp + 8));
ND_PRINT(" pltime:%u vltime:%u",
EXTRACT_BE_U_4(tp),
EXTRACT_BE_U_4(tp + 4));
if (optlen > 25) {
/* there are sub-options */
dhcp6opt_print(ndo, tp + 25, tp + optlen);
}
ND_PRINT(")");
break;
case DH6OPT_LIFETIME:
case DH6OPT_CLT_TIME:
if (optlen != 4) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT(" %u)", EXTRACT_BE_U_4(tp));
break;
case DH6OPT_REMOTE_ID:
if (optlen < 4) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT(" %u ", EXTRACT_BE_U_4(tp));
/*
* Print hex dump first 10 characters.
*/
for (i = 4; i < optlen && i < 14; i++)
ND_PRINT("%02x", EXTRACT_U_1(tp + i));
ND_PRINT("...)");
break;
case DH6OPT_LQ_QUERY:
if (optlen < 17) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
dh6_lq_query_type = EXTRACT_U_1(tp);
switch (dh6_lq_query_type) {
case 1:
ND_PRINT(" by-address");
break;
case 2:
ND_PRINT(" by-clientID");
break;
default:
ND_PRINT(" type_%u", dh6_lq_query_type);
break;
}
ND_PRINT(" %s", ip6addr_string(ndo, tp + 1));
if (optlen > 17) {
/* there are query-options */
dhcp6opt_print(ndo, tp + 17, tp + optlen);
}
ND_PRINT(")");
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(")");
break;
case DH6OPT_LQ_RELAY_DATA:
if (optlen < 16) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT(" %s ", ip6addr_string(ndo, tp));
/*
* Print hex dump first 10 characters.
*/
for (i = 16; i < optlen && i < 26; i++)
ND_PRINT("%02x", EXTRACT_U_1(tp + i));
ND_PRINT("...)");
break;
case DH6OPT_NTP_SERVER:
if (optlen < 4) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
while (tp < cp + sizeof(*dh6o) + optlen - 4) {
subopt_code = EXTRACT_BE_U_2(tp);
tp += 2;
subopt_len = EXTRACT_BE_U_2(tp);
tp += 2;
if (tp + subopt_len > cp + sizeof(*dh6o) + optlen)
goto trunc;
ND_PRINT(" subopt:%u", subopt_code);
switch (subopt_code) {
case DH6OPT_NTP_SUBOPTION_SRV_ADDR:
case DH6OPT_NTP_SUBOPTION_MC_ADDR:
if (subopt_len != 16) {
ND_PRINT(" ?");
break;
}
ND_PRINT(" %s", ip6addr_string(ndo, tp));
break;
case DH6OPT_NTP_SUBOPTION_SRV_FQDN:
ND_PRINT(" ");
if (ns_nprint(ndo, tp, tp + subopt_len) == NULL)
goto trunc;
break;
default:
ND_PRINT(" ?");
break;
}
tp += subopt_len;
}
ND_PRINT(")");
break;
case DH6OPT_AFTR_NAME:
if (optlen < 3) {
ND_PRINT(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
remain_len = optlen;
ND_PRINT(" ");
/* Encoding is described in section 3.1 of RFC 1035 */
while (remain_len && EXTRACT_U_1(tp)) {
label_len = EXTRACT_U_1(tp);
tp++;
if (label_len < remain_len - 1) {
(void)fn_printn(ndo, tp, label_len, NULL);
tp += label_len;
remain_len -= (label_len + 1);
if(EXTRACT_U_1(tp)) ND_PRINT(".");
} else {
ND_PRINT(" ?");
break;
}
}
ND_PRINT(")");
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(" ?)");
break;
}
tp = (const u_char *)(dh6o + 1);
ND_PRINT("=");
(void)fn_printn(ndo, tp, (u_int)optlen, NULL);
ND_PRINT(")");
break;
default:
ND_PRINT(")");
break;
}
cp += sizeof(*dh6o) + optlen;
}
return;
trunc:
ND_PRINT("[|dhcp6ext]");
}
static void
dhcp6opt_print(const u_char *cp, const u_char *ep)
{
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))
goto trunc;
dh6o = (struct dhcp6opt *)cp;
TCHECK(*dh6o);
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;
case DH6OPT_IA_ADDR:
if (optlen < 24) {
/*(*/
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(")");
break;
}
cp += sizeof(*dh6o) + optlen;
}
return;
trunc:
printf("[|dhcp6ext]");
}
