static int
lwres_printnamelen(const char *p)
{
u_int16_t l;
int advance;
if (p + 2 > (const char *)snapend)
goto trunc;
l = EXTRACT_16BITS(p);
advance = lwres_printname(l, p + 2);
if (advance < 0)
goto trunc;
return 2 + advance;
trunc:
return -1;
}
static int
lwres_printnamelen(netdissect_options *ndo,
const char *p)
{
uint16_t l;
int advance;
if (p + 2 > (const char *)ndo->ndo_snapend)
goto trunc;
l = EXTRACT_16BITS(p);
advance = lwres_printname(ndo, l, p + 2);
if (advance < 0)
goto trunc;
return 2 + advance;
trunc:
return -1;
}
void
lwres_print(netdissect_options *ndo,
register const u_char *bp, u_int length)
{
const struct lwres_lwpacket *np;
uint32_t v;
const char *s;
int response;
int advance;
int unsupported = 0;
np = (const struct lwres_lwpacket *)bp;
ND_TCHECK(np->authlength);
ND_PRINT((ndo, " lwres"));
v = EXTRACT_16BITS(&np->version);
if (ndo->ndo_vflag || v != LWRES_LWPACKETVERSION_0)
ND_PRINT((ndo, " v%u", v));
if (v != LWRES_LWPACKETVERSION_0) {
s = (const char *)np + EXTRACT_32BITS(&np->length);
goto tail;
}
response = EXTRACT_16BITS(&np->pktflags) & LWRES_LWPACKETFLAG_RESPONSE;
/* opcode and pktflags */
v = EXTRACT_32BITS(&np->opcode);
s = tok2str(opcode, "#0x%x", v);
ND_PRINT((ndo, " %s%s", s, response ? "" : "?"));
/* pktflags */
v = EXTRACT_16BITS(&np->pktflags);
if (v & ~LWRES_LWPACKETFLAG_RESPONSE)
ND_PRINT((ndo, "[0x%x]", v));
if (ndo->ndo_vflag > 1) {
ND_PRINT((ndo, " (")); /*)*/
ND_PRINT((ndo, "serial:0x%x", EXTRACT_32BITS(&np->serial)));
ND_PRINT((ndo, " result:0x%x", EXTRACT_32BITS(&np->result)));
ND_PRINT((ndo, " recvlen:%u", EXTRACT_32BITS(&np->recvlength)));
/* BIND910: not used */
if (ndo->ndo_vflag > 2) {
ND_PRINT((ndo, " authtype:0x%x", EXTRACT_16BITS(&np->authtype)));
ND_PRINT((ndo, " authlen:%u", EXTRACT_16BITS(&np->authlength)));
}
/*(*/
ND_PRINT((ndo, ")"));
}
/* per-opcode content */
if (!response) {
/*
* queries
*/
lwres_gabnrequest_t *gabn;
lwres_gnbarequest_t *gnba;
lwres_grbnrequest_t *grbn;
uint32_t l;
gabn = NULL;
gnba = NULL;
grbn = NULL;
switch (EXTRACT_32BITS(&np->opcode)) {
case LWRES_OPCODE_NOOP:
break;
case LWRES_OPCODE_GETADDRSBYNAME:
gabn = (lwres_gabnrequest_t *)(np + 1);
ND_TCHECK(gabn->namelen);
/* XXX gabn points to packed struct */
s = (const char *)&gabn->namelen +
sizeof(gabn->namelen);
l = EXTRACT_16BITS(&gabn->namelen);
/* BIND910: not used */
if (ndo->ndo_vflag > 2) {
ND_PRINT((ndo, " flags:0x%x",
EXTRACT_32BITS(&gabn->flags)));
}
v = EXTRACT_32BITS(&gabn->addrtypes);
switch (v & (LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6)) {
case LWRES_ADDRTYPE_V4:
ND_PRINT((ndo, " IPv4"));
break;
case LWRES_ADDRTYPE_V6:
ND_PRINT((ndo, " IPv6"));
break;
case LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6:
ND_PRINT((ndo, " IPv4/6"));
break;
}
if (v & ~(LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6))
ND_PRINT((ndo, "[0x%x]", v));
advance = lwres_printname(ndo, l, s);
if (advance < 0)
goto trunc;
s += advance;
break;
case LWRES_OPCODE_GETNAMEBYADDR:
gnba = (lwres_gnbarequest_t *)(np + 1);
ND_TCHECK(gnba->addr);
/* BIND910: not used */
if (ndo->ndo_vflag > 2) {
ND_PRINT((ndo, " flags:0x%x",
EXTRACT_32BITS(&gnba->flags)));
}
s = (const char *)&gnba->addr;
advance = lwres_printaddr(ndo, &gnba->addr);
if (advance < 0)
goto trunc;
s += advance;
break;
case LWRES_OPCODE_GETRDATABYNAME:
/* XXX no trace, not tested */
grbn = (lwres_grbnrequest_t *)(np + 1);
ND_TCHECK(grbn->namelen);
/* BIND910: not used */
if (ndo->ndo_vflag > 2) {
ND_PRINT((ndo, " flags:0x%x",
EXTRACT_32BITS(&grbn->flags)));
}
ND_PRINT((ndo, " %s", tok2str(ns_type2str, "Type%d",
EXTRACT_16BITS(&grbn->rdtype))));
if (EXTRACT_16BITS(&grbn->rdclass) != C_IN) {
ND_PRINT((ndo, " %s", tok2str(ns_class2str, "Class%d",
EXTRACT_16BITS(&grbn->rdclass))));
}
/* XXX grbn points to packed struct */
s = (const char *)&grbn->namelen +
sizeof(grbn->namelen);
l = EXTRACT_16BITS(&grbn->namelen);
advance = lwres_printname(ndo, l, s);
if (advance < 0)
goto trunc;
s += advance;
break;
default:
unsupported++;
break;
}
} else {
/*
* responses
*/
lwres_gabnresponse_t *gabn;
lwres_gnbaresponse_t *gnba;
lwres_grbnresponse_t *grbn;
uint32_t l, na;
uint32_t i;
gabn = NULL;
gnba = NULL;
grbn = NULL;
switch (EXTRACT_32BITS(&np->opcode)) {
case LWRES_OPCODE_NOOP:
break;
case LWRES_OPCODE_GETADDRSBYNAME:
gabn = (lwres_gabnresponse_t *)(np + 1);
ND_TCHECK(gabn->realnamelen);
/* XXX gabn points to packed struct */
s = (const char *)&gabn->realnamelen +
sizeof(gabn->realnamelen);
l = EXTRACT_16BITS(&gabn->realnamelen);
/* BIND910: not used */
if (ndo->ndo_vflag > 2) {
ND_PRINT((ndo, " flags:0x%x",
EXTRACT_32BITS(&gabn->flags)));
}
ND_PRINT((ndo, " %u/%u", EXTRACT_16BITS(&gabn->naliases),
EXTRACT_16BITS(&gabn->naddrs)));
advance = lwres_printname(ndo, l, s);
if (advance < 0)
goto trunc;
s += advance;
/* aliases */
na = EXTRACT_16BITS(&gabn->naliases);
for (i = 0; i < na; i++) {
advance = lwres_printnamelen(ndo, s);
if (advance < 0)
goto trunc;
s += advance;
}
/* addrs */
na = EXTRACT_16BITS(&gabn->naddrs);
for (i = 0; i < na; i++) {
advance = lwres_printaddr(ndo, (lwres_addr_t *)s);
if (advance < 0)
goto trunc;
s += advance;
}
break;
case LWRES_OPCODE_GETNAMEBYADDR:
gnba = (lwres_gnbaresponse_t *)(np + 1);
ND_TCHECK(gnba->realnamelen);
/* XXX gnba points to packed struct */
s = (const char *)&gnba->realnamelen +
sizeof(gnba->realnamelen);
l = EXTRACT_16BITS(&gnba->realnamelen);
/* BIND910: not used */
if (ndo->ndo_vflag > 2) {
ND_PRINT((ndo, " flags:0x%x",
EXTRACT_32BITS(&gnba->flags)));
}
ND_PRINT((ndo, " %u", EXTRACT_16BITS(&gnba->naliases)));
advance = lwres_printname(ndo, l, s);
if (advance < 0)
goto trunc;
s += advance;
/* aliases */
na = EXTRACT_16BITS(&gnba->naliases);
for (i = 0; i < na; i++) {
advance = lwres_printnamelen(ndo, s);
if (advance < 0)
goto trunc;
s += advance;
}
break;
case LWRES_OPCODE_GETRDATABYNAME:
/* XXX no trace, not tested */
grbn = (lwres_grbnresponse_t *)(np + 1);
ND_TCHECK(grbn->nsigs);
/* BIND910: not used */
if (ndo->ndo_vflag > 2) {
ND_PRINT((ndo, " flags:0x%x",
EXTRACT_32BITS(&grbn->flags)));
}
ND_PRINT((ndo, " %s", tok2str(ns_type2str, "Type%d",
EXTRACT_16BITS(&grbn->rdtype))));
if (EXTRACT_16BITS(&grbn->rdclass) != C_IN) {
ND_PRINT((ndo, " %s", tok2str(ns_class2str, "Class%d",
EXTRACT_16BITS(&grbn->rdclass))));
}
ND_PRINT((ndo, " TTL "));
relts_print(ndo, EXTRACT_32BITS(&grbn->ttl));
ND_PRINT((ndo, " %u/%u", EXTRACT_16BITS(&grbn->nrdatas),
EXTRACT_16BITS(&grbn->nsigs)));
/* XXX grbn points to packed struct */
s = (const char *)&grbn->nsigs+ sizeof(grbn->nsigs);
advance = lwres_printnamelen(ndo, s);
if (advance < 0)
goto trunc;
s += advance;
/* rdatas */
na = EXTRACT_16BITS(&grbn->nrdatas);
for (i = 0; i < na; i++) {
/* XXX should decode resource data */
advance = lwres_printbinlen(ndo, s);
if (advance < 0)
goto trunc;
s += advance;
}
/* sigs */
na = EXTRACT_16BITS(&grbn->nsigs);
for (i = 0; i < na; i++) {
/* XXX how should we print it? */
advance = lwres_printbinlen(ndo, s);
if (advance < 0)
goto trunc;
s += advance;
}
break;
default:
unsupported++;
break;
}
}
tail:
/* length mismatch */
if (EXTRACT_32BITS(&np->length) != length) {
ND_PRINT((ndo, " [len: %u != %u]", EXTRACT_32BITS(&np->length),
length));
}
if (!unsupported && s < (const char *)np + EXTRACT_32BITS(&np->length))
ND_PRINT((ndo, "[extra]"));
return;
trunc:
ND_PRINT((ndo, "[|lwres]"));
}
