*/
-#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
#include <string.h>
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
uint16_t ospf6_chksum;
uint8_t ospf6_instanceid;
uint8_t ospf6_rsvd;
- union {
+};
- /* Hello packet */
- struct {
- uint32_t hello_ifid;
- union {
- uint8_t pri;
- uint32_t opt;
- } hello_priandopt;
+/*
+ * The OSPF6 header length is 16 bytes, regardless of how your compiler
+ * might choose to pad the above structure.
+ */
+#define OSPF6HDR_LEN 16
+
+/* Hello packet */
+struct hello6 {
+ uint32_t hello_ifid;
+ union {
+ uint8_t pri;
+ uint32_t opt;
+ } hello_priandopt;
#define hello_priority hello_priandopt.pri
#define hello_options hello_priandopt.opt
- uint16_t hello_helloint;
- uint16_t hello_deadint;
- rtrid_t hello_dr;
- rtrid_t hello_bdr;
- rtrid_t hello_neighbor[1]; /* may repeat */
- } un_hello;
-
- /* Database Description packet */
- struct {
- uint32_t db_options;
- uint16_t db_mtu;
- uint8_t db_mbz;
- uint8_t db_flags;
- uint32_t db_seq;
- struct lsa6_hdr db_lshdr[1]; /* may repeat */
- } un_db;
-
- /* Link State Request */
- struct lsr6 {
- uint16_t ls_mbz;
- uint16_t ls_type;
- rtrid_t ls_stateid;
- rtrid_t ls_router;
- } un_lsr[1]; /* may repeat */
-
- /* Link State Update */
- struct {
- uint32_t lsu_count;
- struct lsa6 lsu_lsa[1]; /* may repeat */
- } un_lsu;
+ uint16_t hello_helloint;
+ uint16_t hello_deadint;
+ rtrid_t hello_dr;
+ rtrid_t hello_bdr;
+ rtrid_t hello_neighbor[1]; /* may repeat */
+};
- /* Link State Acknowledgement */
- struct {
- struct lsa6_hdr lsa_lshdr[1]; /* may repeat */
- } un_lsa ;
- } ospf6_un ;
+/* Database Description packet */
+struct dd6 {
+ uint32_t db_options;
+ uint16_t db_mtu;
+ uint8_t db_mbz;
+ uint8_t db_flags;
+ uint32_t db_seq;
+ struct lsa6_hdr db_lshdr[1]; /* may repeat */
};
-#define ospf6_hello ospf6_un.un_hello
-#define ospf6_db ospf6_un.un_db
-#define ospf6_lsr ospf6_un.un_lsr
-#define ospf6_lsu ospf6_un.un_lsu
-#define ospf6_lsa ospf6_un.un_lsa
+/* Link State Request */
+struct lsr6 {
+ uint16_t ls_mbz;
+ uint16_t ls_type;
+ rtrid_t ls_stateid;
+ rtrid_t ls_router;
+};
+
+/* Link State Update */
+struct lsu6 {
+ uint32_t lsu_count;
+ struct lsa6 lsu_lsa[1]; /* may repeat */
+};
static const char tstr[] = " [|ospf3]";
ospf6_print_lshdr(netdissect_options *ndo,
register const struct lsa6_hdr *lshp, const u_char *dataend)
{
- if ((u_char *)(lshp + 1) > dataend)
+ if ((const u_char *)(lshp + 1) > dataend)
goto trunc;
ND_TCHECK(lshp->ls_type);
ND_TCHECK(lshp->ls_seq);
ospf6_print_lsaprefix(netdissect_options *ndo,
const uint8_t *tptr, u_int lsa_length)
{
- const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr;
+ const struct lsa6_prefix *lsapp = (const struct lsa6_prefix *)tptr;
u_int wordlen;
struct in6_addr prefix;
* If it does, find the length of what follows the
* header.
*/
- if (length < sizeof(struct lsa6_hdr) || (u_char *)lsap + length > dataend)
+ if (length < sizeof(struct lsa6_hdr) || (const u_char *)lsap + length > dataend)
return (1);
lsa_length = length - sizeof(struct lsa6_hdr);
- tptr = (uint8_t *)lsap+sizeof(struct lsa6_hdr);
+ tptr = (const uint8_t *)lsap+sizeof(struct lsa6_hdr);
switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
case LS_TYPE_ROUTER | LS_SCOPE_AREA:
ND_PRINT((ndo, ", metric %u",
EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC));
- tptr = (uint8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix;
+ tptr = (const uint8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix;
while (lsa_length != 0) {
bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
if (bytelen < 0)
EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
ASLA_MASK_METRIC));
- tptr = (uint8_t *)lsap->lsa_un.un_asla.asla_prefix;
- lsapp = (struct lsa6_prefix *)tptr;
+ tptr = (const uint8_t *)lsap->lsa_un.un_asla.asla_prefix;
+ lsapp = (const struct lsa6_prefix *)tptr;
bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
if (bytelen < 0)
goto trunc;
tptr += bytelen;
if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
- struct in6_addr *fwdaddr6;
+ const struct in6_addr *fwdaddr6;
- fwdaddr6 = (struct in6_addr *)tptr;
+ fwdaddr6 = (const struct in6_addr *)tptr;
if (lsa_length < sizeof (*fwdaddr6))
return (1);
lsa_length -= sizeof (*fwdaddr6);
if (lsa_length < sizeof (uint32_t))
return (1);
lsa_length -= sizeof (uint32_t);
- ND_TCHECK(*(uint32_t *)tptr);
+ ND_TCHECK(*(const uint32_t *)tptr);
ND_PRINT((ndo, " tag %s",
- ipaddr_string(ndo, (uint32_t *)tptr)));
+ ipaddr_string(ndo, (const uint32_t *)tptr)));
tptr += sizeof(uint32_t);
}
if (lsa_length < sizeof (uint32_t))
return (1);
lsa_length -= sizeof (uint32_t);
- ND_TCHECK(*(uint32_t *)tptr);
+ ND_TCHECK(*(const uint32_t *)tptr);
ND_PRINT((ndo, " RefLSID: %s",
- ipaddr_string(ndo, (uint32_t *)tptr)));
+ ipaddr_string(ndo, (const uint32_t *)tptr)));
tptr += sizeof(uint32_t);
}
break;
ip6addr_string(ndo, &llsap->llsa_lladdr),
prefixes));
- tptr = (uint8_t *)llsap->llsa_prefix;
+ tptr = (const uint8_t *)llsap->llsa_prefix;
while (prefixes > 0) {
bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
if (bytelen < 0)
prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
ND_PRINT((ndo, "\n\t Prefixes %d:", prefixes));
- tptr = (uint8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
+ tptr = (const uint8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
while (prefixes > 0) {
bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
if (bytelen < 0)
switch (op->ospf6_type) {
- case OSPF_TYPE_HELLO:
+ case OSPF_TYPE_HELLO: {
+ register const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+
ND_PRINT((ndo, "\n\tOptions [%s]",
bittok2str(ospf6_option_values, "none",
- EXTRACT_32BITS(&op->ospf6_hello.hello_options))));
+ EXTRACT_32BITS(&hellop->hello_options))));
- ND_TCHECK(op->ospf6_hello.hello_deadint);
+ ND_TCHECK(hellop->hello_deadint);
ND_PRINT((ndo, "\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
- EXTRACT_16BITS(&op->ospf6_hello.hello_helloint),
- EXTRACT_16BITS(&op->ospf6_hello.hello_deadint),
- ipaddr_string(ndo, &op->ospf6_hello.hello_ifid),
- op->ospf6_hello.hello_priority));
+ EXTRACT_16BITS(&hellop->hello_helloint),
+ EXTRACT_16BITS(&hellop->hello_deadint),
+ ipaddr_string(ndo, &hellop->hello_ifid),
+ hellop->hello_priority));
- ND_TCHECK(op->ospf6_hello.hello_dr);
- if (EXTRACT_32BITS(&op->ospf6_hello.hello_dr) != 0)
+ ND_TCHECK(hellop->hello_dr);
+ if (EXTRACT_32BITS(&hellop->hello_dr) != 0)
ND_PRINT((ndo, "\n\t Designated Router %s",
- ipaddr_string(ndo, &op->ospf6_hello.hello_dr)));
- ND_TCHECK(op->ospf6_hello.hello_bdr);
- if (EXTRACT_32BITS(&op->ospf6_hello.hello_bdr) != 0)
+ ipaddr_string(ndo, &hellop->hello_dr)));
+ ND_TCHECK(hellop->hello_bdr);
+ if (EXTRACT_32BITS(&hellop->hello_bdr) != 0)
ND_PRINT((ndo, ", Backup Designated Router %s",
- ipaddr_string(ndo, &op->ospf6_hello.hello_bdr)));
+ ipaddr_string(ndo, &hellop->hello_bdr)));
if (ndo->ndo_vflag > 1) {
ND_PRINT((ndo, "\n\t Neighbor List:"));
- ap = op->ospf6_hello.hello_neighbor;
- while ((u_char *)ap < dataend) {
+ ap = hellop->hello_neighbor;
+ while ((const u_char *)ap < dataend) {
ND_TCHECK(*ap);
ND_PRINT((ndo, "\n\t %s", ipaddr_string(ndo, ap)));
++ap;
}
}
break; /* HELLO */
+ }
+
+ case OSPF_TYPE_DD: {
+ register const struct dd6 *ddp = (const struct dd6 *)((const uint8_t *)op + OSPF6HDR_LEN);
- case OSPF_TYPE_DD:
- ND_TCHECK(op->ospf6_db.db_options);
+ ND_TCHECK(ddp->db_options);
ND_PRINT((ndo, "\n\tOptions [%s]",
bittok2str(ospf6_option_values, "none",
- EXTRACT_32BITS(&op->ospf6_db.db_options))));
- ND_TCHECK(op->ospf6_db.db_flags);
+ EXTRACT_32BITS(&ddp->db_options))));
+ ND_TCHECK(ddp->db_flags);
ND_PRINT((ndo, ", DD Flags [%s]",
- bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags)));
+ bittok2str(ospf6_dd_flag_values,"none",ddp->db_flags)));
- ND_TCHECK(op->ospf6_db.db_seq);
+ ND_TCHECK(ddp->db_seq);
ND_PRINT((ndo, ", MTU %u, DD-Sequence 0x%08x",
- EXTRACT_16BITS(&op->ospf6_db.db_mtu),
- EXTRACT_32BITS(&op->ospf6_db.db_seq)));
+ EXTRACT_16BITS(&ddp->db_mtu),
+ EXTRACT_32BITS(&ddp->db_seq)));
if (ndo->ndo_vflag > 1) {
/* Print all the LS adv's */
- lshp = op->ospf6_db.db_lshdr;
- while ((u_char *)lshp < dataend) {
+ lshp = ddp->db_lshdr;
+ while ((const u_char *)lshp < dataend) {
if (ospf6_print_lshdr(ndo, lshp++, dataend))
goto trunc;
}
}
break;
+ }
case OSPF_TYPE_LS_REQ:
if (ndo->ndo_vflag > 1) {
- lsrp = op->ospf6_lsr;
- while ((u_char *)lsrp < dataend) {
+ lsrp = (const struct lsr6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+ while ((const u_char *)lsrp < dataend) {
ND_TCHECK(*lsrp);
ND_PRINT((ndo, "\n\t Advertising Router %s",
ipaddr_string(ndo, &lsrp->ls_router)));
case OSPF_TYPE_LS_UPDATE:
if (ndo->ndo_vflag > 1) {
- lsap = op->ospf6_lsu.lsu_lsa;
- ND_TCHECK(op->ospf6_lsu.lsu_count);
- i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count);
- while ((u_char *)lsap < dataend && i--) {
+ register const struct lsu6 *lsup = (const struct lsu6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+
+ ND_TCHECK(lsup->lsu_count);
+ i = EXTRACT_32BITS(&lsup->lsu_count);
+ lsap = lsup->lsu_lsa;
+ while ((const u_char *)lsap < dataend && i--) {
if (ospf6_print_lsa(ndo, lsap, dataend))
goto trunc;
- lsap = (struct lsa6 *)((u_char *)lsap +
+ lsap = (const struct lsa6 *)((const u_char *)lsap +
EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
}
}
break;
-
case OSPF_TYPE_LS_ACK:
if (ndo->ndo_vflag > 1) {
- lshp = op->ospf6_lsa.lsa_lshdr;
- while ((u_char *)lshp < dataend) {
+ lshp = (const struct lsa6_hdr *)((const uint8_t *)op + OSPF6HDR_LEN);
+ while ((const u_char *)lshp < dataend) {
if (ospf6_print_lshdr(ndo, lshp++, dataend))
goto trunc;
}
const struct ospf6hdr *op, const u_char *cp, const unsigned len)
{
int llslen = 0;
- u_char lls_hello = op->ospf6_type == OSPF_TYPE_HELLO &&
- EXTRACT_32BITS(&op->ospf6_hello.hello_options) & OSPF6_OPTION_L;
- u_char lls_dd = op->ospf6_type == OSPF_TYPE_DD &&
- EXTRACT_32BITS(&op->ospf6_db.db_options) & OSPF6_OPTION_L;
-
+ int lls_hello = 0;
+ int lls_dd = 0;
+
+ if (op->ospf6_type == OSPF_TYPE_HELLO) {
+ const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+ if (EXTRACT_32BITS(&hellop->hello_options) & OSPF6_OPTION_L)
+ lls_hello = 1;
+ } else if (op->ospf6_type == OSPF_TYPE_DD) {
+ const struct dd6 *ddp = (const struct dd6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+ if (EXTRACT_32BITS(&ddp->db_options) & OSPF6_OPTION_L)
+ lls_dd = 1;
+ }
if ((lls_hello || lls_dd) && (llslen = ospf6_print_lls(ndo, cp, len)) < 0)
goto trunc;
return ospf6_decode_at(ndo, cp + llslen, len - llslen);
register const char *cp;
uint16_t datalen;
- op = (struct ospf6hdr *)bp;
+ op = (const struct ospf6hdr *)bp;
/* If the type is valid translate it, or just print the type */
/* value. If it's not valid, say so and return */
projects / tcpdump / blobdiff