* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
+/*
+ * draft-ietf-dhc-dhcpv6-22.txt
+ */
#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.13 2001-01-28 09:49:49 itojun Exp $";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.17 2002-06-01 23:50:30 guy Exp $";
#endif
#ifdef HAVE_CONFIG_H
#include <sys/time.h>
#include <sys/socket.h>
-struct mbuf;
-struct rtentry;
-
#include <netinet/in.h>
#include <ctype.h>
#include "interface.h"
#include "addrtoname.h"
-#include "dhcp6.h"
-#include "dhcp6opt.h"
-
-#if 0
-static void dhcp6opttab_init(void);
-static struct dhcp6_opt *dhcp6opttab_byname(char *);
-#endif
-static struct dhcp6_opt *dhcp6opttab_bycode(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 },
-};
-
-#if 0
-static struct dhcp6_opt *dh6o_pad;
-static struct dhcp6_opt *dh6o_end;
+/* 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_REPLY 7
+#define DH6_INFORM_REQ 11
+
+/* DHCP6 base packet format */
+struct dhcp6 {
+ union {
+ u_int8_t m;
+ u_int32_t x;
+ } dh6_msgtypexid;
+ struct in6_addr dh6_servaddr;
+ /* options follow */
+} __attribute__ ((__packed__));
+#define dh6_msgtype dh6_msgtypexid.m
+#define dh6_xid dh6_msgtypexid.x
+#define DH6_XIDMASK 0x00ffffff
+
+/* option */
+#define DH6OPT_DUID 1 /* TBD */
+#define DH6OPT_DNS 11 /* TBD */
+struct dhcp6opt {
+ u_int16_t dh6opt_type;
+ u_int16_t dh6opt_len;
+ /* type-dependent data follows */
+} __attribute__ ((__packed__));
static void
-dhcp6opttab_init()
-{
- dh6o_pad = dhcp6opttab_bycode(0);
- dh6o_end = dhcp6opttab_bycode(65536);
-}
-#endif
-
-#if 0
-static struct dhcp6_opt *
-dhcp6opttab_byname(name)
- char *name;
+dhcp6opt_print(u_char *cp, u_char *ep)
{
- struct dhcp6_opt *p;
-
- for (p = dh6opttab; p->code; p++)
- if (strcmp(name, p->name) == 0)
- return p;
- return NULL;
-}
-#endif
-
-static struct dhcp6_opt *
-dhcp6opttab_bycode(code)
- u_int code;
-{
- struct dhcp6_opt *p;
-
- for (p = dh6opttab; p->code; p++)
- if (p->code == code)
- return p;
- return NULL;
-}
-
-static void
-dhcp6ext_print(u_char *cp, u_char *ep)
-{
- u_int16_t code, len;
- struct dhcp6_opt *p;
- char buf[BUFSIZ];
+ struct dhcp6opt *dh6o;
+ u_char *tp;
int i;
+ size_t optlen;
if (cp == ep)
return;
while (cp < ep) {
- if (ep - cp < sizeof(u_int16_t))
- break;
- code = ntohs(*(u_int16_t *)&cp[0]);
- if (ep - cp < sizeof(u_int16_t) * 2)
- break;
- if (code != 65535)
- len = ntohs(*(u_int16_t *)&cp[2]);
- else
- len = 0;
- if (ep - cp < len + 4)
- break;
- p = dhcp6opttab_bycode(code);
- if (p == NULL) {
- printf("(unknown, len=%d)", len);
- cp += len + 4;
- continue;
- }
-
- /* sanity check on length */
- switch (p->len) {
- case OL6_N:
- break;
- case OL6_16N:
- if (len % 16 != 0)
- goto trunc;
- break;
- case OL6_Z:
- if (len != 0)
- goto trunc;
+ if (ep - cp < sizeof(*dh6o))
+ goto trunc;
+ dh6o = (struct dhcp6opt *)cp;
+ optlen = ntohs(dh6o->dh6opt_len);
+ if (ep - cp < sizeof(*dh6o) + optlen)
+ goto trunc;
+ switch (ntohs(dh6o->dh6opt_type)) {
+ case DH6OPT_DUID:
+ printf(" (duid"); /*)*/
+ if (optlen < 2) {
+ /*(*/
+ printf(" ??)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ switch (ntohs(*(u_int16_t *)tp)) {
+ case 1:
+ if (optlen >= 2 + 6) {
+ printf(" hwaddr/time time %u type %u ",
+ ntohl(*(u_int32_t *)&tp[2]),
+ ntohs(*(u_int16_t *)&tp[6]));
+ 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 ",
+ ntohs(*(u_int16_t *)&tp[2]));
+ for (i = 4; i < optlen; i++)
+ printf("%02x", tp[i]);
+ /*(*/
+ printf(")");
+ } else {
+ /*(*/
+ printf(" ??)");
+ }
+ }
break;
+ case DH6OPT_DNS:
+ printf(" (dnsserver"); /*)*/
+ if (optlen % 16) {
+ /*(*/
+ printf(" ??)");
+ break;
+ }
+ tp = (u_char *)(dh6o + 1);
+ for (i = 0; i < optlen; i += 16)
+ printf(" %s", ip6addr_string(&tp[i]));
+ /*(*/
+ printf(")");
default:
- if (len != p->len)
- goto trunc;
+ printf(" (opt-%u)", ntohs(dh6o->dh6opt_type));
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);
- }
- break;
- case OT6_STR:
- memset(&buf, 0, sizeof(buf));
- strncpy(buf, &cp[4], len);
- printf("%s", buf);
- break;
- case OT6_NUM:
- printf("%d", (u_int32_t)ntohl(*(u_int32_t *)&cp[4]));
- break;
- default:
- for (i = 0; i < len; i++)
- printf("%02x", cp[4 + i] & 0xff);
- }
- 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)
{
- union dhcp6 *dh6;
+ struct dhcp6 *dh6;
u_char *ep;
u_char *extp;
- u_int16_t field16;
+ const char *name;
printf("dhcp6");
ep = (u_char *)snapend;
- dh6 = (union dhcp6 *)cp;
- TCHECK(dh6->dh6_msgtype);
+ dh6 = (struct dhcp6 *)cp;
+ TCHECK(dh6->dh6_servaddr);
switch (dh6->dh6_msgtype) {
- case DH6_SOLICIT:
- if (!(vflag && TTEST(dh6->dh6_sol.dh6sol_relayaddr))) {
- printf(" solicit");
- break;
- }
-
- 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_PLEN_MASK)
- printf("plen=%d ", DH6SOL_SOLICIT_PLEN(field16));
- printf("solicit-ID=%d", DH6SOL_SOLICIT_ID(field16));
-
- printf(" cliaddr=%s",
- ip6addr_string(&dh6->dh6_sol.dh6sol_cliaddr));
- printf(" relayaddr=%s",
- ip6addr_string(&dh6->dh6_sol.dh6sol_relayaddr));
- /*(*/
- printf(")");
- 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(")");
- 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(")");
- 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");
+ case DH6_INFORM_REQ:
+ name= "inf-req";
break;
- case DH6_RECONFIG:
- printf(" reconfig");
+ default:
+ name = NULL;
break;
}
+
+ if (!vflag) {
+ if (name)
+ printf(" %s", name);
+ else
+ 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); /*)*/
+ printf("xid=%x", ntohl(dh6->dh6_xid) & DH6_XIDMASK);
+ printf(" server=%s", ip6addr_string(&dh6->dh6_servaddr));
+ extp = (u_char *)(dh6 + 1);
+ dhcp6opt_print(extp, ep);
+ /*(*/
+ printf(")");
return;
trunc:
- printf("%s", tstr);
+ printf("[|dhcp6]");
}
projects / tcpdump / blobdiff