* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
+
+/* \summary: IPv6 DHCP printer */
+
/*
* RFC3315: DHCPv6
- * supported DHCPv6 options:
+ * supported DHCPv6 options:
* RFC3319: Session Initiation Protocol (SIP) Servers options,
* RFC3633: IPv6 Prefix options,
* RFC3646: DNS Configuration options,
* 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"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
-#include <stdio.h>
-#include <string.h>
-
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
/* lease duration */
-#define DHCP6_DURATITION_INFINITE 0xffffffff
+#define DHCP6_DURATION_INFINITE 0xffffffff
/* Error Values */
#define DH6ERR_FAILURE 16
#define DH6_LEASEQUERY 14
#define DH6_LQ_REPLY 15
+static const struct tok dh6_msgtype_str[] = {
+ { DH6_SOLICIT, "solicit" },
+ { DH6_ADVERTISE, "advertise" },
+ { DH6_REQUEST, "request" },
+ { DH6_CONFIRM, "confirm" },
+ { DH6_RENEW, "renew" },
+ { DH6_REBIND, "rebind" },
+ { DH6_REPLY, "reply" },
+ { DH6_RELEASE, "release" },
+ { DH6_DECLINE, "decline" },
+ { DH6_RECONFIGURE, "reconfigure" },
+ { DH6_INFORM_REQ, "inf-req" },
+ { DH6_RELAY_FORW, "relay-fwd" },
+ { DH6_RELAY_REPLY, "relay-reply" },
+ { DH6_LEASEQUERY, "leasequery" },
+ { DH6_LQ_REPLY, "leasequery-reply" },
+ { 0, NULL }
+};
+
/* DHCP6 base packet format */
struct dhcp6 {
union {
- u_int8_t m;
- u_int32_t x;
+ nd_uint8_t msgtype;
+ nd_uint32_t xid;
} 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];
+ nd_uint8_t dh6relay_msgtype;
+ nd_uint8_t dh6relay_hcnt;
+ nd_ipv6 dh6relay_linkaddr; /* XXX: badly aligned */
+ nd_ipv6 dh6relay_peeraddr;
/* options follow */
};
#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_NTP_SUBOPTION_MC_ADDR 2
# define DH6OPT_NTP_SUBOPTION_SRV_FQDN 3
#define DH6OPT_AFTR_NAME 64
+#define DH6OPT_MUDURL 112
+
+static const struct tok dh6opt_str[] = {
+ { DH6OPT_CLIENTID, "client-ID" },
+ { DH6OPT_SERVERID, "server-ID" },
+ { DH6OPT_IA_NA, "IA_NA" },
+ { DH6OPT_IA_TA, "IA_TA" },
+ { DH6OPT_IA_ADDR, "IA_ADDR" },
+ { DH6OPT_ORO, "option-request" },
+ { DH6OPT_PREFERENCE, "preference" },
+ { DH6OPT_ELAPSED_TIME, "elapsed-time" },
+ { DH6OPT_RELAY_MSG, "relay-message" },
+ { DH6OPT_AUTH, "authentication" },
+ { DH6OPT_UNICAST, "server-unicast" },
+ { DH6OPT_STATUS_CODE, "status-code" },
+ { DH6OPT_RAPID_COMMIT, "rapid-commit" },
+ { DH6OPT_USER_CLASS, "user-class" },
+ { DH6OPT_VENDOR_CLASS, "vendor-class" },
+ { DH6OPT_VENDOR_OPTS, "vendor-specific-info" },
+ { DH6OPT_INTERFACE_ID, "interface-ID" },
+ { DH6OPT_RECONF_MSG, "reconfigure-message" },
+ { DH6OPT_RECONF_ACCEPT, "reconfigure-accept" },
+ { DH6OPT_SIP_SERVER_D, "SIP-servers-domain" },
+ { DH6OPT_SIP_SERVER_A, "SIP-servers-address" },
+ { DH6OPT_DNS_SERVERS, "DNS-server" },
+ { DH6OPT_DOMAIN_LIST, "DNS-search-list" },
+ { DH6OPT_IA_PD, "IA_PD" },
+ { DH6OPT_IA_PD_PREFIX, "IA_PD-prefix" },
+ { DH6OPT_SNTP_SERVERS, "SNTP-servers" },
+ { DH6OPT_LIFETIME, "lifetime" },
+ { DH6OPT_NIS_SERVERS, "NIS-server" },
+ { DH6OPT_NISP_SERVERS, "NIS+-server" },
+ { DH6OPT_NIS_NAME, "NIS-domain-name" },
+ { DH6OPT_NISP_NAME, "NIS+-domain-name" },
+ { DH6OPT_BCMCS_SERVER_D, "BCMCS-domain-name" },
+ { DH6OPT_BCMCS_SERVER_A, "BCMCS-server" },
+ { DH6OPT_GEOCONF_CIVIC, "Geoconf-Civic" },
+ { DH6OPT_REMOTE_ID, "Remote-ID" },
+ { DH6OPT_SUBSCRIBER_ID, "Subscriber-ID" },
+ { DH6OPT_CLIENT_FQDN, "Client-FQDN" },
+ { DH6OPT_PANA_AGENT, "PANA-agent" },
+ { DH6OPT_NEW_POSIX_TIMEZONE, "POSIX-timezone" },
+ { DH6OPT_NEW_TZDB_TIMEZONE, "POSIX-tz-database" },
+ { DH6OPT_ERO, "Echo-request-option" },
+ { DH6OPT_LQ_QUERY, "Lease-query" },
+ { DH6OPT_CLIENT_DATA, "LQ-client-data" },
+ { DH6OPT_CLT_TIME, "Clt-time" },
+ { DH6OPT_LQ_RELAY_DATA, "LQ-relay-data" },
+ { DH6OPT_LQ_CLIENT_LINK, "LQ-client-link" },
+ { DH6OPT_NTP_SERVER, "NTP-server" },
+ { DH6OPT_AFTR_NAME, "AFTR-Name" },
+ { DH6OPT_MUDURL, "MUD-URL" },
+ { 0, NULL }
+};
+
+static const struct tok dh6opt_stcode_str[] = {
+ { DH6OPT_STCODE_SUCCESS, "Success" }, /* RFC3315 */
+ { DH6OPT_STCODE_UNSPECFAIL, "UnspecFail" }, /* RFC3315 */
+ { DH6OPT_STCODE_NOADDRAVAIL, "NoAddrsAvail" }, /* RFC3315 */
+ { DH6OPT_STCODE_NOBINDING, "NoBinding" }, /* RFC3315 */
+ { DH6OPT_STCODE_NOTONLINK, "NotOnLink" }, /* RFC3315 */
+ { DH6OPT_STCODE_USEMULTICAST, "UseMulticast" }, /* RFC3315 */
+ { DH6OPT_STCODE_NOPREFIXAVAIL, "NoPrefixAvail" }, /* RFC3633 */
+ { DH6OPT_STCODE_UNKNOWNQUERYTYPE, "UnknownQueryType" }, /* RFC5007 */
+ { DH6OPT_STCODE_MALFORMEDQUERY, "MalformedQuery" }, /* RFC5007 */
+ { DH6OPT_STCODE_NOTCONFIGURED, "NotConfigured" }, /* RFC5007 */
+ { DH6OPT_STCODE_NOTALLOWED, "NotAllowed" }, /* RFC5007 */
+ { 0, NULL }
+};
struct dhcp6opt {
- u_int16_t dh6opt_type;
- u_int16_t dh6opt_len;
+ nd_uint16_t dh6opt_type;
+ nd_uint16_t dh6opt_len;
/* type-dependent data follows */
};
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:
- return "DNS-server";
- case DH6OPT_DNSNAME:
- 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)
+dhcp6stcode(const uint16_t 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);
- }
+ return code > 255 ? "INVALID code" : tok2str(dh6opt_stcode_str, "code%u", code);
}
static void
-dhcp6opt_print(const u_char *cp, const u_char *ep)
+dhcp6opt_print(netdissect_options *ndo,
+ const u_char *cp, const u_char *ep)
{
- struct dhcp6opt *dh6o;
+ 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 i;
+ uint16_t opttype;
+ uint16_t optlen;
+ uint8_t auth_proto;
+ uint8_t auth_alg;
+ uint8_t auth_rdm;
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;
+ 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 = (struct dhcp6opt *)cp;
- TCHECK(*dh6o);
- optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
+ dh6o = (const struct dhcp6opt *)cp;
+ ND_TCHECK_SIZE(dh6o);
+ optlen = GET_BE_U_2(dh6o->dh6opt_len);
if (ep < cp + sizeof(*dh6o) + optlen)
goto trunc;
- opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
- printf(" (%s", dhcp6opt_name(opttype));
+ opttype = GET_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) {
/*(*/
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- switch (EXTRACT_16BITS(tp)) {
+ tp = (const u_char *)(dh6o + 1);
+ switch (GET_BE_U_2(tp)) {
case 1:
if (optlen >= 2 + 6) {
- printf(" hwaddr/time type %u time %u ",
- EXTRACT_16BITS(&tp[2]),
- EXTRACT_32BITS(&tp[4]));
+ ND_PRINT(" hwaddr/time type %u time %u ",
+ GET_BE_U_2(tp + 2),
+ GET_BE_U_4(tp + 4));
for (i = 8; i < optlen; i++)
- printf("%02x", tp[i]);
+ ND_PRINT("%02x",
+ GET_U_1(tp + i));
/*(*/
- printf(")");
+ ND_PRINT(")");
} else {
/*(*/
- printf(" ?)");
+ ND_PRINT(" ?)");
}
break;
case 2:
if (optlen >= 2 + 8) {
- printf(" vid ");
+ ND_PRINT(" vid ");
for (i = 2; i < 2 + 8; i++)
- printf("%02x", tp[i]);
+ ND_PRINT("%02x",
+ GET_U_1(tp + i));
/*(*/
- printf(")");
+ ND_PRINT(")");
} else {
/*(*/
- printf(" ?)");
+ ND_PRINT(" ?)");
}
break;
case 3:
if (optlen >= 2 + 2) {
- printf(" hwaddr type %u ",
- EXTRACT_16BITS(&tp[2]));
+ ND_PRINT(" hwaddr type %u ",
+ GET_BE_U_2(tp + 2));
for (i = 4; i < optlen; i++)
- printf("%02x", tp[i]);
+ ND_PRINT("%02x",
+ GET_U_1(tp + i));
/*(*/
- printf(")");
+ ND_PRINT(")");
} else {
/*(*/
- printf(" ?)");
+ ND_PRINT(" ?)");
}
break;
default:
- printf(" type %d)", EXTRACT_16BITS(tp));
+ ND_PRINT(" type %u)", GET_BE_U_2(tp));
break;
}
break;
case DH6OPT_IA_ADDR:
if (optlen < 24) {
/*(*/
- printf(" ?)");
+ ND_PRINT(" ?)");
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]));
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" %s", GET_IP6ADDR_STRING(tp));
+ ND_PRINT(" pltime:%u vltime:%u",
+ GET_BE_U_4(tp + 16),
+ GET_BE_U_4(tp + 20));
if (optlen > 24) {
/* there are sub-options */
- dhcp6opt_print(tp + 24, tp + optlen);
+ dhcp6opt_print(ndo, tp + 24, tp + optlen);
}
- printf(")");
+ ND_PRINT(")");
break;
case DH6OPT_ORO:
case DH6OPT_ERO:
if (optlen % 2) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
+ tp = (const u_char *)(dh6o + 1);
for (i = 0; i < optlen; i += 2) {
- printf(" %s",
- dhcp6opt_name(EXTRACT_16BITS(&tp[i])));
+ ND_PRINT(" %s",
+ tok2str(dh6opt_str, "opt_%u", GET_BE_U_2(tp + i)));
}
- printf(")");
+ ND_PRINT(")");
break;
case DH6OPT_PREFERENCE:
if (optlen != 1) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- printf(" %d)", *tp);
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" %u)", GET_U_1(tp));
break;
case DH6OPT_ELAPSED_TIME:
if (optlen != 2) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- printf(" %d)", EXTRACT_16BITS(tp));
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" %u)", GET_BE_U_2(tp));
break;
case DH6OPT_RELAY_MSG:
- printf(" (");
- tp = (u_char *)(dh6o + 1);
- dhcp6_print(tp, optlen);
- printf(")");
+ {
+ const u_char *snapend_save;
+
+ ND_PRINT(" (");
+ tp = (const u_char *)(dh6o + 1);
+ /*
+ * Update the snapend to the end of the option before
+ * calling recursively dhcp6_print() for the nested
+ * packet. Other options may be present after the
+ * nested DHCPv6 packet. This prevents that, in
+ * dhcp6_print(), for the nested DHCPv6 packet, the
+ * remaining length < remaining caplen.
+ */
+ snapend_save = ndo->ndo_snapend;
+ ndo->ndo_snapend = ND_MIN(tp + optlen, ndo->ndo_snapend);
+ dhcp6_print(ndo, tp, optlen);
+ ndo->ndo_snapend = snapend_save;
+ ND_PRINT(")");
break;
+ }
case DH6OPT_AUTH:
if (optlen < 11) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- auth_proto = *tp;
+ tp = (const u_char *)(dh6o + 1);
+ auth_proto = GET_U_1(tp);
switch (auth_proto) {
case DH6OPT_AUTHPROTO_DELAYED:
- printf(" proto: delayed");
+ ND_PRINT(" proto: delayed");
break;
case DH6OPT_AUTHPROTO_RECONFIG:
- printf(" proto: reconfigure");
+ ND_PRINT(" proto: reconfigure");
break;
default:
- printf(" proto: %d", auth_proto);
+ ND_PRINT(" proto: %u", auth_proto);
break;
}
tp++;
- switch (*tp) {
+ auth_alg = GET_U_1(tp);
+ switch (auth_alg) {
case DH6OPT_AUTHALG_HMACMD5:
/* XXX: may depend on the protocol */
- printf(", alg: HMAC-MD5");
+ ND_PRINT(", alg: HMAC-MD5");
break;
default:
- printf(", alg: %d", *tp);
+ ND_PRINT(", alg: %u", auth_alg);
break;
}
tp++;
- switch (*tp) {
+ auth_rdm = GET_U_1(tp);
+ switch (auth_rdm) {
case DH6OPT_AUTHRDM_MONOCOUNTER:
- printf(", RDM: mono");
+ ND_PRINT(", RDM: mono");
break;
default:
- printf(", RDM: %d", *tp);
+ ND_PRINT(", RDM: %u", auth_rdm);
break;
}
tp++;
- printf(", RD:");
+ ND_PRINT(", RD:");
for (i = 0; i < 4; i++, tp += 2)
- printf(" %04x", EXTRACT_16BITS(tp));
+ ND_PRINT(" %04x", GET_BE_U_2(tp));
/* protocol dependent part */
authinfolen = optlen - 11;
if (authinfolen == 0)
break;
if (authinfolen < 20) {
- printf(" ??");
+ ND_PRINT(" ??");
break;
}
authrealmlen = authinfolen - 20;
if (authrealmlen > 0) {
- printf(", realm: ");
+ ND_PRINT(", realm: ");
}
for (i = 0; i < authrealmlen; i++, tp++)
- printf("%02x", *tp);
- printf(", key ID: %08x", EXTRACT_32BITS(tp));
+ ND_PRINT("%02x", GET_U_1(tp));
+ ND_PRINT(", key ID: %08x", GET_BE_U_4(tp));
tp += 4;
- printf(", HMAC-MD5:");
+ ND_PRINT(", HMAC-MD5:");
for (i = 0; i < 4; i++, tp+= 4)
- printf(" %08x", EXTRACT_32BITS(tp));
+ ND_PRINT(" %08x", GET_BE_U_4(tp));
break;
case DH6OPT_AUTHPROTO_RECONFIG:
if (authinfolen != 17) {
- printf(" ??");
+ ND_PRINT(" ??");
break;
}
- switch (*tp++) {
+ switch (GET_U_1(tp)) {
case DH6OPT_AUTHRECONFIG_KEY:
- printf(" reconfig-key");
+ ND_PRINT(" reconfig-key");
break;
case DH6OPT_AUTHRECONFIG_HMACMD5:
- printf(" type: HMAC-MD5");
+ ND_PRINT(" type: HMAC-MD5");
break;
default:
- printf(" type: ??");
+ ND_PRINT(" type: ??");
break;
}
- printf(" value:");
+ tp++;
+ ND_PRINT(" value:");
for (i = 0; i < 4; i++, tp+= 4)
- printf(" %08x", EXTRACT_32BITS(tp));
+ ND_PRINT(" %08x", GET_BE_U_4(tp));
break;
default:
- printf(" ??");
+ ND_PRINT(" ??");
break;
}
- printf(")");
+ ND_PRINT(")");
break;
case DH6OPT_RAPID_COMMIT: /* nothing todo */
- printf(")");
+ 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 = (u_char *)(dh6o + 1);
- printf(" ");
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" ");
for (i = 0; i < optlen && i < 10; i++)
- printf("%02x", tp[i]);
- printf("...)");
+ ND_PRINT("%02x", GET_U_1(tp + i));
+ ND_PRINT("...)");
break;
case DH6OPT_RECONF_MSG:
- tp = (u_char *)(dh6o + 1);
- switch (*tp) {
+ if (optlen != 1) {
+ ND_PRINT(" ?)");
+ break;
+ }
+ tp = (const u_char *)(dh6o + 1);
+ dh6_reconf_type = GET_U_1(tp);
+ switch (dh6_reconf_type) {
case DH6_RENEW:
- printf(" for renew)");
+ ND_PRINT(" for renew)");
break;
case DH6_INFORM_REQ:
- printf(" for inf-req)");
+ ND_PRINT(" for inf-req)");
break;
default:
- printf(" for ?\?\?(%02x))", *tp);
+ ND_PRINT(" for ?\?\?(%02x))", dh6_reconf_type);
break;
}
break;
case DH6OPT_RECONF_ACCEPT: /* nothing todo */
- printf(")");
+ ND_PRINT(")");
break;
case DH6OPT_SIP_SERVER_A:
- case DH6OPT_DNS:
+ case DH6OPT_DNS_SERVERS:
case DH6OPT_SNTP_SERVERS:
case DH6OPT_NIS_SERVERS:
case DH6OPT_NISP_SERVERS:
case DH6OPT_PANA_AGENT:
case DH6OPT_LQ_CLIENT_LINK:
if (optlen % 16) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
+ tp = (const u_char *)(dh6o + 1);
for (i = 0; i < optlen; i += 16)
- printf(" %s", ip6addr_string(&tp[i]));
- printf(")");
+ ND_PRINT(" %s", GET_IP6ADDR_STRING(tp + i));
+ ND_PRINT(")");
break;
case DH6OPT_SIP_SERVER_D:
- tp = (u_char *)(dh6o + 1);
- while (tp < ep) {
- putchar(' ');
- if((tp = ns_nprint(tp, ep)) == NULL)
+ case DH6OPT_DOMAIN_LIST:
+ tp = (const u_char *)(dh6o + 1);
+ while (tp < cp + sizeof(*dh6o) + optlen) {
+ ND_PRINT(" ");
+ if ((tp = fqdn_print(ndo, tp, cp + sizeof(*dh6o) + optlen)) == NULL)
goto trunc;
}
+ ND_PRINT(")");
break;
case DH6OPT_STATUS_CODE:
if (optlen < 2) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- printf(" %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0])));
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" %s)", dhcp6stcode(GET_BE_U_2(tp)));
break;
case DH6OPT_IA_NA:
case DH6OPT_IA_PD:
if (optlen < 12) {
- printf(" ?)");
+ ND_PRINT(" ?)");
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]));
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" IAID:%u T1:%u T2:%u",
+ GET_BE_U_4(tp),
+ GET_BE_U_4(tp + 4),
+ GET_BE_U_4(tp + 8));
if (optlen > 12) {
/* there are sub-options */
- dhcp6opt_print(tp + 12, tp + optlen);
+ dhcp6opt_print(ndo, tp + 12, tp + optlen);
}
- printf(")");
+ ND_PRINT(")");
break;
case DH6OPT_IA_TA:
if (optlen < 4) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- printf(" IAID:%u", EXTRACT_32BITS(tp));
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" IAID:%u", GET_BE_U_4(tp));
if (optlen > 4) {
/* there are sub-options */
- dhcp6opt_print(tp + 4, tp + optlen);
+ dhcp6opt_print(ndo, tp + 4, tp + optlen);
}
- printf(")");
+ ND_PRINT(")");
break;
case DH6OPT_IA_PD_PREFIX:
if (optlen < 25) {
- printf(" ?)");
+ ND_PRINT(" ?)");
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]));
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" %s/%u", GET_IP6ADDR_STRING(tp + 9),
+ GET_U_1(tp + 8));
+ ND_PRINT(" pltime:%u vltime:%u",
+ GET_BE_U_4(tp),
+ GET_BE_U_4(tp + 4));
if (optlen > 25) {
/* there are sub-options */
- dhcp6opt_print(tp + 25, tp + optlen);
+ dhcp6opt_print(ndo, tp + 25, tp + optlen);
}
- printf(")");
+ ND_PRINT(")");
break;
case DH6OPT_LIFETIME:
case DH6OPT_CLT_TIME:
if (optlen != 4) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- printf(" %d)", EXTRACT_32BITS(tp));
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" %u)", GET_BE_U_4(tp));
break;
case DH6OPT_REMOTE_ID:
if (optlen < 4) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- printf(" %d ", EXTRACT_32BITS(tp));
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" %u ", GET_BE_U_4(tp));
/*
* Print hex dump first 10 characters.
*/
for (i = 4; i < optlen && i < 14; i++)
- printf("%02x", tp[i]);
- printf("...)");
+ ND_PRINT("%02x", GET_U_1(tp + i));
+ ND_PRINT("...)");
break;
case DH6OPT_LQ_QUERY:
if (optlen < 17) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- switch (*tp) {
+ tp = (const u_char *)(dh6o + 1);
+ dh6_lq_query_type = GET_U_1(tp);
+ switch (dh6_lq_query_type) {
case 1:
- printf(" by-address");
+ ND_PRINT(" by-address");
break;
case 2:
- printf(" by-clientID");
+ ND_PRINT(" by-clientID");
break;
default:
- printf(" type_%d", (int)*tp);
+ ND_PRINT(" type_%u", dh6_lq_query_type);
break;
}
- printf(" %s", ip6addr_string(&tp[1]));
+ ND_PRINT(" %s", GET_IP6ADDR_STRING(tp + 1));
if (optlen > 17) {
/* there are query-options */
- dhcp6opt_print(tp + 17, tp + optlen);
+ dhcp6opt_print(ndo, tp + 17, tp + optlen);
}
- printf(")");
+ ND_PRINT(")");
break;
case DH6OPT_CLIENT_DATA:
- tp = (u_char *)(dh6o + 1);
+ tp = (const u_char *)(dh6o + 1);
if (optlen > 0) {
/* there are encapsulated options */
- dhcp6opt_print(tp, tp + optlen);
+ dhcp6opt_print(ndo, tp, tp + optlen);
}
- printf(")");
+ ND_PRINT(")");
break;
case DH6OPT_LQ_RELAY_DATA:
if (optlen < 16) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- printf(" %s ", ip6addr_string(&tp[0]));
+ tp = (const u_char *)(dh6o + 1);
+ ND_PRINT(" %s ", GET_IP6ADDR_STRING(tp));
/*
* Print hex dump first 10 characters.
*/
for (i = 16; i < optlen && i < 26; i++)
- printf("%02x", tp[i]);
- printf("...)");
+ ND_PRINT("%02x", GET_U_1(tp + i));
+ ND_PRINT("...)");
break;
case DH6OPT_NTP_SERVER:
if (optlen < 4) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
- while (tp < ep - 4) {
- subopt_code = EXTRACT_16BITS(tp);
+ tp = (const u_char *)(dh6o + 1);
+ while (tp < cp + sizeof(*dh6o) + optlen - 4) {
+ subopt_code = GET_BE_U_2(tp);
tp += 2;
- subopt_len = EXTRACT_16BITS(tp);
+ subopt_len = GET_BE_U_2(tp);
tp += 2;
- printf(" subopt:%d", subopt_code);
+ 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) {
- printf(" ?");
+ ND_PRINT(" ?");
break;
}
- printf(" %s", ip6addr_string(&tp[0]));
- tp += subopt_len;
+ ND_PRINT(" %s", GET_IP6ADDR_STRING(tp));
break;
case DH6OPT_NTP_SUBOPTION_SRV_FQDN:
- putchar(' ');
- ns_nprint(tp, ep);
- tp += subopt_len;
+ ND_PRINT(" ");
+ if (fqdn_print(ndo, tp, tp + subopt_len) == NULL)
+ goto trunc;
break;
default:
- printf(" ?");
+ ND_PRINT(" ?");
break;
}
+ tp += subopt_len;
}
- printf(")");
+ ND_PRINT(")");
break;
case DH6OPT_AFTR_NAME:
if (optlen < 3) {
- printf(" ?)");
+ ND_PRINT(" ?)");
break;
}
- tp = (u_char *)(dh6o + 1);
+ tp = (const u_char *)(dh6o + 1);
remain_len = optlen;
- printf(" ");
+ ND_PRINT(" ");
/* Encoding is described in section 3.1 of RFC 1035 */
- while (remain_len && *tp) {
- label_len = *tp++;
+ while (remain_len && GET_U_1(tp)) {
+ label_len = GET_U_1(tp);
+ tp++;
if (label_len < remain_len - 1) {
- printf("%.*s", label_len, tp);
+ nd_printjnp(ndo, tp, label_len);
tp += label_len;
remain_len -= (label_len + 1);
- if(*tp) printf(".");
+ if(GET_U_1(tp)) ND_PRINT(".");
} else {
- printf(" ?");
+ ND_PRINT(" ?");
break;
}
}
- printf(")");
+ 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(" ");
+ nd_printjnp(ndo, tp, optlen);
+ ND_PRINT(")");
+ break;
+
default:
- printf(")");
+ ND_PRINT(")");
break;
}
return;
trunc:
- printf("[|dhcp6ext]");
+ nd_print_trunc(ndo);
}
/*
* Print dhcp6 packets
*/
void
-dhcp6_print(const u_char *cp, u_int length)
+dhcp6_print(netdissect_options *ndo,
+ const u_char *cp, u_int length)
{
- struct dhcp6 *dh6;
- struct dhcp6_relay *dh6relay;
+ const struct dhcp6 *dh6;
+ const struct dhcp6_relay *dh6relay;
+ uint8_t msgtype;
const u_char *ep;
- u_char *extp;
+ const u_char *extp;
const char *name;
- printf("dhcp6");
+ ndo->ndo_protocol = "dhcp6";
+ ND_PRINT("dhcp6");
- ep = (u_char *)snapend;
+ ep = ndo->ndo_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:
- 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;
- }
+ dh6 = (const struct dhcp6 *)cp;
+ dh6relay = (const struct dhcp6_relay *)cp;
+ ND_TCHECK_4(dh6->dh6_msgtypexid.xid);
+ msgtype = GET_U_1(dh6->dh6_msgtypexid.msgtype);
+ name = tok2str(dh6_msgtype_str, "msgtype-%u", msgtype);
- 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);
- }
+ if (!ndo->ndo_vflag) {
+ ND_PRINT(" %s", name);
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);
+ ND_PRINT(" %s (", name); /*)*/
+ if (msgtype != DH6_RELAY_FORW && msgtype != DH6_RELAY_REPLY) {
+ ND_PRINT("xid=%x",
+ GET_BE_U_4(dh6->dh6_msgtypexid.xid) & DH6_XIDMASK);
+ extp = (const u_char *)(dh6 + 1);
+ dhcp6opt_print(ndo, 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));
+ ND_PRINT("linkaddr=%s", GET_IP6ADDR_STRING(dh6relay->dh6relay_linkaddr));
- memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6));
- printf(" peeraddr=%s", ip6addr_string(&addr6));
+ ND_PRINT(" peeraddr=%s", GET_IP6ADDR_STRING(dh6relay->dh6relay_peeraddr));
- dhcp6opt_print((u_char *)(dh6relay + 1), ep);
+ dhcp6opt_print(ndo, (const u_char *)(dh6relay + 1), ep);
}
/*(*/
- printf(")");
+ ND_PRINT(")");
return;
trunc:
- printf("[|dhcp6]");
+ nd_print_trunc(ndo);
}
projects / tcpdump / blobdiff