#include <tcpdump-stdinc.h>
-/* for offsetof */
-#include <stddef.h>
-
#include "interface.h"
#include "addrtoname.h"
#include "extract.h" /* must come after interface.h */
uint8_t rerr_flags; /* various flags */
uint8_t rerr_zero0; /* reserved, set to zero */
uint8_t rerr_dc; /* destination count */
- union {
- struct rerr_unreach dest[1];
-#ifdef INET6
- struct rerr_unreach6 dest6[1];
- struct rerr_unreach6_draft_01 dest6_draft_01[1];
-#endif
- } r;
};
#define RERR_NODELETE 0x80 /* don't delete the link */
uint8_t ra_zero0;
};
-union aodv {
- struct aodv_rreq rreq;
- struct aodv_rrep rrep;
- struct aodv_rerr rerr;
- struct aodv_rrep_ack rrep_ack;
-#ifdef INET6
- struct aodv_rreq6 rreq6;
- struct aodv_rreq6_draft_01 rreq6_draft_01;
- struct aodv_rrep6 rrep6;
- struct aodv_rrep6_draft_01 rrep6_draft_01;
-#endif
-};
-
#define AODV_RREQ 1 /* route request */
#define AODV_RREP 2 /* route response */
#define AODV_RERR 3 /* error report */
aodv_extension(netdissect_options *ndo,
const struct aodv_ext *ep, u_int length)
{
- u_int i;
const struct aodv_hello *ah;
switch (ep->type) {
case AODV_EXT_HELLO:
- if (ndo->ndo_snapend < (u_char *) ep) {
- ND_PRINT((ndo, " [|hello]"));
- return;
- }
- i = min(length, (u_int)(ndo->ndo_snapend - (u_char *)ep));
- if (i < sizeof(struct aodv_hello)) {
- ND_PRINT((ndo, " [|hello]"));
- return;
- }
- i -= sizeof(struct aodv_hello);
- ah = (void *)ep;
+ ah = (const struct aodv_hello *)(const void *)ep;
+ ND_TCHECK(*ah);
+ if (length < sizeof(struct aodv_hello))
+ goto trunc;
ND_PRINT((ndo, "\n\text HELLO %ld ms",
(unsigned long)EXTRACT_32BITS(&ah->interval)));
break;
ND_PRINT((ndo, "\n\text %u %u", ep->type, ep->length));
break;
}
+ return;
+
+trunc:
+ ND_PRINT((ndo, " [|hello]"));
}
static void
-aodv_rreq(netdissect_options *ndo,
- const union aodv *ap, const u_char *dat, u_int length)
+aodv_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
{
u_int i;
+ const struct aodv_rreq *ap = (const struct aodv_rreq *)dat;
- if (ndo->ndo_snapend < dat) {
- ND_PRINT((ndo, " [|aodv]"));
- return;
- }
- i = min(length, (u_int)(ndo->ndo_snapend - dat));
- if (i < sizeof(ap->rreq)) {
- ND_PRINT((ndo, " [|rreq]"));
- return;
- }
- i -= sizeof(ap->rreq);
+ ND_TCHECK(*ap);
+ if (length < sizeof(*ap))
+ goto trunc;
ND_PRINT((ndo, " rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
"\tdst %s seq %lu src %s seq %lu", length,
- ap->rreq.rreq_type & RREQ_JOIN ? "[J]" : "",
- ap->rreq.rreq_type & RREQ_REPAIR ? "[R]" : "",
- ap->rreq.rreq_type & RREQ_GRAT ? "[G]" : "",
- ap->rreq.rreq_type & RREQ_DEST ? "[D]" : "",
- ap->rreq.rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
- ap->rreq.rreq_hops,
- (unsigned long)EXTRACT_32BITS(&ap->rreq.rreq_id),
- ipaddr_string(ndo, &ap->rreq.rreq_da),
- (unsigned long)EXTRACT_32BITS(&ap->rreq.rreq_ds),
- ipaddr_string(ndo, &ap->rreq.rreq_oa),
- (unsigned long)EXTRACT_32BITS(&ap->rreq.rreq_os)));
+ ap->rreq_type & RREQ_JOIN ? "[J]" : "",
+ ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
+ ap->rreq_type & RREQ_GRAT ? "[G]" : "",
+ ap->rreq_type & RREQ_DEST ? "[D]" : "",
+ ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
+ ap->rreq_hops,
+ (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
+ ipaddr_string(ndo, &ap->rreq_da),
+ (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
+ ipaddr_string(ndo, &ap->rreq_oa),
+ (unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
+ i = length - sizeof(*ap);
if (i >= sizeof(struct aodv_ext))
- aodv_extension(ndo, (void *)(&ap->rreq + 1), i);
+ aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
+ return;
+
+trunc:
+ ND_PRINT((ndo, " [|rreq"));
}
static void
-aodv_rrep(netdissect_options *ndo,
- const union aodv *ap, const u_char *dat, u_int length)
+aodv_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
{
u_int i;
+ const struct aodv_rrep *ap = (const struct aodv_rrep *)dat;
- if (ndo->ndo_snapend < dat) {
- ND_PRINT((ndo, " [|aodv]"));
- return;
- }
- i = min(length, (u_int)(ndo->ndo_snapend - dat));
- if (i < sizeof(ap->rrep)) {
- ND_PRINT((ndo, " [|rrep]"));
- return;
- }
- i -= sizeof(ap->rrep);
+ ND_TCHECK(*ap);
+ if (length < sizeof(*ap))
+ goto trunc;
ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
"\tdst %s dseq %lu src %s %lu ms", length,
- ap->rrep.rrep_type & RREP_REPAIR ? "[R]" : "",
- ap->rrep.rrep_type & RREP_ACK ? "[A] " : " ",
- ap->rrep.rrep_ps & RREP_PREFIX_MASK,
- ap->rrep.rrep_hops,
- ipaddr_string(ndo, &ap->rrep.rrep_da),
- (unsigned long)EXTRACT_32BITS(&ap->rrep.rrep_ds),
- ipaddr_string(ndo, &ap->rrep.rrep_oa),
- (unsigned long)EXTRACT_32BITS(&ap->rrep.rrep_life)));
+ ap->rrep_type & RREP_REPAIR ? "[R]" : "",
+ ap->rrep_type & RREP_ACK ? "[A] " : " ",
+ ap->rrep_ps & RREP_PREFIX_MASK,
+ ap->rrep_hops,
+ ipaddr_string(ndo, &ap->rrep_da),
+ (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
+ ipaddr_string(ndo, &ap->rrep_oa),
+ (unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
+ i = length - sizeof(*ap);
if (i >= sizeof(struct aodv_ext))
- aodv_extension(ndo, (void *)(&ap->rrep + 1), i);
+ aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
+ return;
+
+trunc:
+ ND_PRINT((ndo, " [|rreq"));
}
static void
-aodv_rerr(netdissect_options *ndo,
- const union aodv *ap, const u_char *dat, u_int length)
+aodv_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
{
- u_int i;
- const struct rerr_unreach *dp = NULL;
- int n, trunc;
+ u_int i, dc;
+ const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
+ const struct rerr_unreach *dp;
- if (ndo->ndo_snapend < dat) {
- ND_PRINT((ndo, " [|aodv]"));
- return;
- }
- i = min(length, (u_int)(ndo->ndo_snapend - dat));
- if (i < offsetof(struct aodv_rerr, r)) {
- ND_PRINT((ndo, " [|rerr]"));
- return;
- }
- i -= offsetof(struct aodv_rerr, r);
- dp = &ap->rerr.r.dest[0];
- n = ap->rerr.rerr_dc * sizeof(ap->rerr.r.dest[0]);
+ ND_TCHECK(*ap);
+ if (length < sizeof(*ap))
+ goto trunc;
ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
- ap->rerr.rerr_flags & RERR_NODELETE ? "[D]" : "",
- ap->rerr.rerr_dc, length));
- trunc = n - (i/sizeof(ap->rerr.r.dest[0]));
- for (; i >= sizeof(ap->rerr.r.dest[0]);
- ++dp, i -= sizeof(ap->rerr.r.dest[0])) {
+ ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
+ ap->rerr_dc, length));
+ dp = (struct rerr_unreach *)(dat + sizeof(*ap));
+ i = length - sizeof(*ap);
+ for (dc = ap->rerr_dc; dc != 0; dc--) {
+ ND_TCHECK(*dp);
+ if (i < sizeof(*dp))
+ goto trunc;
ND_PRINT((ndo, " {%s}(%ld)", ipaddr_string(ndo, &dp->u_da),
(unsigned long)EXTRACT_32BITS(&dp->u_ds)));
+ dp++;
+ i -= sizeof(*dp);
}
- if (trunc)
- ND_PRINT((ndo, "[|rerr]"));
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[|rerr]"));
}
static void
#ifdef INET6
-aodv_v6_rreq(netdissect_options *ndo,
- const union aodv *ap, const u_char *dat, u_int length)
+aodv_v6_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
#else
-aodv_v6_rreq(netdissect_options *ndo,
- const union aodv *ap _U_, const u_char *dat _U_, u_int length)
+aodv_v6_rreq(netdissect_options *ndo, const u_char *dat _U_, u_int length)
#endif
{
#ifdef INET6
u_int i;
+ const struct aodv_rreq6 *ap = (const struct aodv_rreq6 *)dat;
- if (ndo->ndo_snapend < dat) {
- ND_PRINT((ndo, " [|aodv]"));
- return;
- }
- i = min(length, (u_int)(ndo->ndo_snapend - dat));
- if (i < sizeof(ap->rreq6)) {
- ND_PRINT((ndo, " [|rreq6]"));
- return;
- }
- i -= sizeof(ap->rreq6);
+ ND_TCHECK(*ap);
+ if (length < sizeof(*ap))
+ goto trunc;
ND_PRINT((ndo, " v6 rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
"\tdst %s seq %lu src %s seq %lu", length,
- ap->rreq6.rreq_type & RREQ_JOIN ? "[J]" : "",
- ap->rreq6.rreq_type & RREQ_REPAIR ? "[R]" : "",
- ap->rreq6.rreq_type & RREQ_GRAT ? "[G]" : "",
- ap->rreq6.rreq_type & RREQ_DEST ? "[D]" : "",
- ap->rreq6.rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
- ap->rreq6.rreq_hops,
- (unsigned long)EXTRACT_32BITS(&ap->rreq6.rreq_id),
- ip6addr_string(ndo, &ap->rreq6.rreq_da),
- (unsigned long)EXTRACT_32BITS(&ap->rreq6.rreq_ds),
- ip6addr_string(ndo, &ap->rreq6.rreq_oa),
- (unsigned long)EXTRACT_32BITS(&ap->rreq6.rreq_os)));
+ ap->rreq_type & RREQ_JOIN ? "[J]" : "",
+ ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
+ ap->rreq_type & RREQ_GRAT ? "[G]" : "",
+ ap->rreq_type & RREQ_DEST ? "[D]" : "",
+ ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
+ ap->rreq_hops,
+ (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
+ ip6addr_string(ndo, &ap->rreq_da),
+ (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
+ ip6addr_string(ndo, &ap->rreq_oa),
+ (unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
+ i = length - sizeof(*ap);
if (i >= sizeof(struct aodv_ext))
- aodv_extension(ndo, (void *)(&ap->rreq6 + 1), i);
+ aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
+ return;
+
+trunc:
+ ND_PRINT((ndo, " [|rreq"));
#else
ND_PRINT((ndo, " v6 rreq %u", length));
#endif
static void
#ifdef INET6
-aodv_v6_rrep(netdissect_options *ndo,
- const union aodv *ap, const u_char *dat, u_int length)
+aodv_v6_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
#else
-aodv_v6_rrep(netdissect_options *ndo,
- const union aodv *ap _U_, const u_char *dat _U_, u_int length)
+aodv_v6_rrep(netdissect_options *ndo, const u_char *dat _U_, u_int length)
#endif
{
#ifdef INET6
u_int i;
+ const struct aodv_rrep6 *ap = (const struct aodv_rrep6 *)dat;
- if (ndo->ndo_snapend < dat) {
- ND_PRINT((ndo, " [|aodv]"));
- return;
- }
- i = min(length, (u_int)(ndo->ndo_snapend - dat));
- if (i < sizeof(ap->rrep6)) {
- ND_PRINT((ndo, " [|rrep6]"));
- return;
- }
- i -= sizeof(ap->rrep6);
+ ND_TCHECK(*ap);
+ if (length < sizeof(*ap))
+ goto trunc;
ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
"\tdst %s dseq %lu src %s %lu ms", length,
- ap->rrep6.rrep_type & RREP_REPAIR ? "[R]" : "",
- ap->rrep6.rrep_type & RREP_ACK ? "[A] " : " ",
- ap->rrep6.rrep_ps & RREP_PREFIX_MASK,
- ap->rrep6.rrep_hops,
- ip6addr_string(ndo, &ap->rrep6.rrep_da),
- (unsigned long)EXTRACT_32BITS(&ap->rrep6.rrep_ds),
- ip6addr_string(ndo, &ap->rrep6.rrep_oa),
- (unsigned long)EXTRACT_32BITS(&ap->rrep6.rrep_life)));
+ ap->rrep_type & RREP_REPAIR ? "[R]" : "",
+ ap->rrep_type & RREP_ACK ? "[A] " : " ",
+ ap->rrep_ps & RREP_PREFIX_MASK,
+ ap->rrep_hops,
+ ip6addr_string(ndo, &ap->rrep_da),
+ (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
+ ip6addr_string(ndo, &ap->rrep_oa),
+ (unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
+ i = length - sizeof(*ap);
if (i >= sizeof(struct aodv_ext))
- aodv_extension(ndo, (void *)(&ap->rrep6 + 1), i);
+ aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
+ return;
+
+trunc:
+ ND_PRINT((ndo, " [|rreq"));
#else
ND_PRINT((ndo, " rrep %u", length));
#endif
static void
#ifdef INET6
-aodv_v6_rerr(netdissect_options *ndo,
- const union aodv *ap, u_int length)
+aodv_v6_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
#else
-aodv_v6_rerr(netdissect_options *ndo,
- const union aodv *ap _U_, u_int length)
+aodv_v6_rerr(netdissect_options *ndo, const u_char *dat _U_, u_int length)
#endif
{
#ifdef INET6
- const struct rerr_unreach6 *dp6 = NULL;
- int i, j, n, trunc;
+ u_int i, dc;
+ const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
+ const struct rerr_unreach6 *dp6;
- i = length - offsetof(struct aodv_rerr, r);
- j = sizeof(ap->rerr.r.dest6[0]);
- dp6 = &ap->rerr.r.dest6[0];
- n = ap->rerr.rerr_dc * j;
+ ND_TCHECK(*ap);
+ if (length < sizeof(*ap))
+ goto trunc;
ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
- ap->rerr.rerr_flags & RERR_NODELETE ? "[D]" : "",
- ap->rerr.rerr_dc, length));
- trunc = n - (i/j);
- for (; i -= j >= 0; ++dp6) {
+ ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
+ ap->rerr_dc, length));
+ dp6 = (struct rerr_unreach6 *)(void *)(ap + 1);
+ i = length - sizeof(*ap);
+ for (dc = ap->rerr_dc; dc != 0; dc--) {
+ ND_TCHECK(*dp6);
+ if (i < sizeof(*dp6))
+ goto trunc;
ND_PRINT((ndo, " {%s}(%ld)", ip6addr_string(ndo, &dp6->u_da),
(unsigned long)EXTRACT_32BITS(&dp6->u_ds)));
+ dp6++;
+ i -= sizeof(*dp6);
}
- if (trunc)
- ND_PRINT((ndo, "[|rerr]"));
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[|rerr]"));
#else
ND_PRINT((ndo, " rerr %u", length));
#endif
static void
#ifdef INET6
-aodv_v6_draft_01_rreq(netdissect_options *ndo,
- const union aodv *ap, const u_char *dat, u_int length)
+aodv_v6_draft_01_rreq(netdissect_options *ndo, const u_char *dat, u_int length)
#else
-aodv_v6_draft_01_rreq(netdissect_options *ndo,
- const union aodv *ap _U_, const u_char *dat _U_,
- u_int length)
+aodv_v6_draft_01_rreq(netdissect_options *ndo, const u_char *dat _U_, u_int length)
#endif
{
#ifdef INET6
u_int i;
+ const struct aodv_rreq6_draft_01 *ap = (const struct aodv_rreq6_draft_01 *)dat;
- if (ndo->ndo_snapend < dat) {
- ND_PRINT((ndo, " [|aodv]"));
- return;
- }
- i = min(length, (u_int)(ndo->ndo_snapend - dat));
- if (i < sizeof(ap->rreq6_draft_01)) {
- ND_PRINT((ndo, " [|rreq6]"));
- return;
- }
- i -= sizeof(ap->rreq6_draft_01);
+ ND_TCHECK(*ap);
+ if (length < sizeof(*ap))
+ goto trunc;
ND_PRINT((ndo, " rreq %u %s%s%s%s%shops %u id 0x%08lx\n"
"\tdst %s seq %lu src %s seq %lu", length,
- ap->rreq6_draft_01.rreq_type & RREQ_JOIN ? "[J]" : "",
- ap->rreq6_draft_01.rreq_type & RREQ_REPAIR ? "[R]" : "",
- ap->rreq6_draft_01.rreq_type & RREQ_GRAT ? "[G]" : "",
- ap->rreq6_draft_01.rreq_type & RREQ_DEST ? "[D]" : "",
- ap->rreq6_draft_01.rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
- ap->rreq6_draft_01.rreq_hops,
- (unsigned long)EXTRACT_32BITS(&ap->rreq6_draft_01.rreq_id),
- ip6addr_string(ndo, &ap->rreq6_draft_01.rreq_da),
- (unsigned long)EXTRACT_32BITS(&ap->rreq6_draft_01.rreq_ds),
- ip6addr_string(ndo, &ap->rreq6_draft_01.rreq_oa),
- (unsigned long)EXTRACT_32BITS(&ap->rreq6_draft_01.rreq_os)));
+ ap->rreq_type & RREQ_JOIN ? "[J]" : "",
+ ap->rreq_type & RREQ_REPAIR ? "[R]" : "",
+ ap->rreq_type & RREQ_GRAT ? "[G]" : "",
+ ap->rreq_type & RREQ_DEST ? "[D]" : "",
+ ap->rreq_type & RREQ_UNKNOWN ? "[U] " : " ",
+ ap->rreq_hops,
+ (unsigned long)EXTRACT_32BITS(&ap->rreq_id),
+ ip6addr_string(ndo, &ap->rreq_da),
+ (unsigned long)EXTRACT_32BITS(&ap->rreq_ds),
+ ip6addr_string(ndo, &ap->rreq_oa),
+ (unsigned long)EXTRACT_32BITS(&ap->rreq_os)));
+ i = length - sizeof(*ap);
if (i >= sizeof(struct aodv_ext))
- aodv_extension(ndo, (void *)(&ap->rreq6_draft_01 + 1), i);
+ aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
+ return;
+
+trunc:
+ ND_PRINT((ndo, " [|rreq"));
#else
ND_PRINT((ndo, " rreq %u", length));
#endif
static void
#ifdef INET6
-aodv_v6_draft_01_rrep(netdissect_options *ndo,
- const union aodv *ap, const u_char *dat, u_int length)
+aodv_v6_draft_01_rrep(netdissect_options *ndo, const u_char *dat, u_int length)
#else
-aodv_v6_draft_01_rrep(netdissect_options *ndo,
- const union aodv *ap _U_, const u_char *dat _U_,
- u_int length)
+aodv_v6_draft_01_rrep(netdissect_options *ndo, const u_char *dat _U_, u_int length)
#endif
{
#ifdef INET6
u_int i;
+ const struct aodv_rrep6_draft_01 *ap = (const struct aodv_rrep6_draft_01 *)dat;
- if (ndo->ndo_snapend < dat) {
- ND_PRINT((ndo, " [|aodv]"));
- return;
- }
- i = min(length, (u_int)(ndo->ndo_snapend - dat));
- if (i < sizeof(ap->rrep6_draft_01)) {
- ND_PRINT((ndo, " [|rrep6]"));
- return;
- }
- i -= sizeof(ap->rrep6_draft_01);
+ ND_TCHECK(*ap);
+ if (length < sizeof(*ap))
+ goto trunc;
ND_PRINT((ndo, " rrep %u %s%sprefix %u hops %u\n"
"\tdst %s dseq %lu src %s %lu ms", length,
- ap->rrep6_draft_01.rrep_type & RREP_REPAIR ? "[R]" : "",
- ap->rrep6_draft_01.rrep_type & RREP_ACK ? "[A] " : " ",
- ap->rrep6_draft_01.rrep_ps & RREP_PREFIX_MASK,
- ap->rrep6_draft_01.rrep_hops,
- ip6addr_string(ndo, &ap->rrep6_draft_01.rrep_da),
- (unsigned long)EXTRACT_32BITS(&ap->rrep6_draft_01.rrep_ds),
- ip6addr_string(ndo, &ap->rrep6_draft_01.rrep_oa),
- (unsigned long)EXTRACT_32BITS(&ap->rrep6_draft_01.rrep_life)));
+ ap->rrep_type & RREP_REPAIR ? "[R]" : "",
+ ap->rrep_type & RREP_ACK ? "[A] " : " ",
+ ap->rrep_ps & RREP_PREFIX_MASK,
+ ap->rrep_hops,
+ ip6addr_string(ndo, &ap->rrep_da),
+ (unsigned long)EXTRACT_32BITS(&ap->rrep_ds),
+ ip6addr_string(ndo, &ap->rrep_oa),
+ (unsigned long)EXTRACT_32BITS(&ap->rrep_life)));
+ i = length - sizeof(*ap);
if (i >= sizeof(struct aodv_ext))
- aodv_extension(ndo, (void *)(&ap->rrep6_draft_01 + 1), i);
+ aodv_extension(ndo, (const struct aodv_ext *)(dat + sizeof(*ap)), i);
+ return;
+
+trunc:
+ ND_PRINT((ndo, " [|rreq"));
#else
ND_PRINT((ndo, " rrep %u", length));
#endif
static void
#ifdef INET6
-aodv_v6_draft_01_rerr(netdissect_options *ndo,
- const union aodv *ap, u_int length)
+aodv_v6_draft_01_rerr(netdissect_options *ndo, const u_char *dat, u_int length)
#else
-aodv_v6_draft_01_rerr(netdissect_options *ndo,
- const union aodv *ap _U_, u_int length)
+aodv_v6_draft_01_rerr(netdissect_options *ndo, const u_char *dat _U_, u_int length)
#endif
{
#ifdef INET6
- const struct rerr_unreach6_draft_01 *dp6 = NULL;
- int i, j, n, trunc;
+ u_int i, dc;
+ const struct aodv_rerr *ap = (const struct aodv_rerr *)dat;
+ const struct rerr_unreach6_draft_01 *dp6;
- i = length - offsetof(struct aodv_rerr, r);
- j = sizeof(ap->rerr.r.dest6_draft_01[0]);
- dp6 = &ap->rerr.r.dest6_draft_01[0];
- n = ap->rerr.rerr_dc * j;
+ ND_TCHECK(*ap);
+ if (length < sizeof(*ap))
+ goto trunc;
ND_PRINT((ndo, " rerr %s [items %u] [%u]:",
- ap->rerr.rerr_flags & RERR_NODELETE ? "[D]" : "",
- ap->rerr.rerr_dc, length));
- trunc = n - (i/j);
- for (; i -= j >= 0; ++dp6) {
+ ap->rerr_flags & RERR_NODELETE ? "[D]" : "",
+ ap->rerr_dc, length));
+ dp6 = (struct rerr_unreach6_draft_01 *)(void *)(ap + 1);
+ i = length - sizeof(*ap);
+ for (dc = ap->rerr_dc; dc != 0; dc--) {
+ ND_TCHECK(*dp6);
+ if (i < sizeof(*dp6))
+ goto trunc;
ND_PRINT((ndo, " {%s}(%ld)", ip6addr_string(ndo, &dp6->u_da),
(unsigned long)EXTRACT_32BITS(&dp6->u_ds)));
+ dp6++;
+ i -= sizeof(*dp6);
}
- if (trunc)
- ND_PRINT((ndo, "[|rerr]"));
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[|rerr]"));
#else
ND_PRINT((ndo, " rerr %u", length));
#endif
aodv_print(netdissect_options *ndo,
const u_char *dat, u_int length, int is_ip6)
{
- const union aodv *ap;
-
- ap = (union aodv *)dat;
- if (ndo->ndo_snapend < dat) {
- ND_PRINT((ndo, " [|aodv]"));
- return;
- }
- if (min(length, (u_int)(ndo->ndo_snapend - dat)) < sizeof(ap->rrep_ack)) {
- ND_PRINT((ndo, " [|aodv]"));
- return;
- }
+ uint8_t msg_type;
+
+ /*
+ * The message type is the first byte; make sure we have it
+ * and then fetch it.
+ */
+ ND_TCHECK(*dat);
+ msg_type = *dat;
ND_PRINT((ndo, " aodv"));
- switch (ap->rerr.rerr_type) {
+ switch (msg_type) {
case AODV_RREQ:
if (is_ip6)
- aodv_v6_rreq(ndo, ap, dat, length);
+ aodv_v6_rreq(ndo, dat, length);
else
- aodv_rreq(ndo, ap, dat, length);
+ aodv_rreq(ndo, dat, length);
break;
case AODV_RREP:
if (is_ip6)
- aodv_v6_rrep(ndo, ap, dat, length);
+ aodv_v6_rrep(ndo, dat, length);
else
- aodv_rrep(ndo, ap, dat, length);
+ aodv_rrep(ndo, dat, length);
break;
case AODV_RERR:
if (is_ip6)
- aodv_v6_rerr(ndo, ap, length);
+ aodv_v6_rerr(ndo, dat, length);
else
- aodv_rerr(ndo, ap, dat, length);
+ aodv_rerr(ndo, dat, length);
break;
case AODV_RREP_ACK:
break;
case AODV_V6_DRAFT_01_RREQ:
- aodv_v6_draft_01_rreq(ndo, ap, dat, length);
+ aodv_v6_draft_01_rreq(ndo, dat, length);
break;
case AODV_V6_DRAFT_01_RREP:
- aodv_v6_draft_01_rrep(ndo, ap, dat, length);
+ aodv_v6_draft_01_rrep(ndo, dat, length);
break;
case AODV_V6_DRAFT_01_RERR:
- aodv_v6_draft_01_rerr(ndo, ap, length);
+ aodv_v6_draft_01_rerr(ndo, dat, length);
break;
case AODV_V6_DRAFT_01_RREP_ACK:
break;
default:
- ND_PRINT((ndo, " %u %u", ap->rreq.rreq_type, length));
+ ND_PRINT((ndo, " type %u %u", msg_type, length));
}
+ return;
+
+trunc:
+ ND_PRINT((ndo, " [|aodv]"));
}
projects / tcpdump / blobdiff