static void
process_request(ns_lwdclient_t *client) {
lwres_buffer_t b;
isc_result_t result;
lwres_buffer_init(&b, client->buffer, client->recvlength);
lwres_buffer_add(&b, client->recvlength);
result = lwres_lwpacket_parseheader(&b, &client->pkt);
if (result != ISC_R_SUCCESS) {
ns_lwdclient_log(50, "invalid packet header received");
goto restart;
}
ns_lwdclient_log(50, "opcode %08x", client->pkt.opcode);
switch (client->pkt.opcode) {
case LWRES_OPCODE_GETADDRSBYNAME:
ns_lwdclient_processgabn(client, &b);
return;
case LWRES_OPCODE_GETNAMEBYADDR:
ns_lwdclient_processgnba(client, &b);
return;
case LWRES_OPCODE_GETRDATABYNAME:
ns_lwdclient_processgrbn(client, &b);
return;
case LWRES_OPCODE_NOOP:
ns_lwdclient_processnoop(client, &b);
return;
default:
ns_lwdclient_log(50, "unknown opcode %08x", client->pkt.opcode);
goto restart;
}
/*
* Drop the packet.
*/
restart:
ns_lwdclient_log(50, "restarting client %p...", client);
ns_lwdclient_stateidle(client);
}
static void
test_noop(void) {
int ret;
lwres_lwpacket_t pkt, pkt2;
lwres_nooprequest_t nooprequest, *nooprequest2;
lwres_noopresponse_t noopresponse, *noopresponse2;
lwres_buffer_t b;
pkt.pktflags = 0;
pkt.serial = 0x11223344;
pkt.recvlength = 0x55667788;
pkt.result = 0;
nooprequest.datalength = strlen(TESTSTRING);
/* XXXDCL maybe "nooprequest.data" should be const. */
DE_CONST(TESTSTRING, nooprequest.data);
ret = lwres_nooprequest_render(ctx, &nooprequest, &pkt, &b);
CHECK(ret, "lwres_nooprequest_render");
hexdump("rendered noop request", b.base, b.used);
/*
* Now, parse it into a new structure.
*/
lwres_buffer_first(&b);
ret = lwres_lwpacket_parseheader(&b, &pkt2);
CHECK(ret, "lwres_lwpacket_parseheader");
hexdump("parsed pkt2", &pkt2, sizeof(pkt2));
nooprequest2 = NULL;
ret = lwres_nooprequest_parse(ctx, &b, &pkt2, &nooprequest2);
CHECK(ret, "lwres_nooprequest_parse");
assert(nooprequest.datalength == nooprequest2->datalength);
assert(memcmp(nooprequest.data, nooprequest2->data,
nooprequest.datalength) == 0);
lwres_nooprequest_free(ctx, &nooprequest2);
lwres_context_freemem(ctx, b.base, b.length);
b.base = NULL;
b.length = 0;
pkt.pktflags = 0;
pkt.serial = 0x11223344;
pkt.recvlength = 0x55667788;
pkt.result = 0xdeadbeef;
noopresponse.datalength = strlen(TESTSTRING);
/* XXXDCL maybe "noopresponse.data" should be const. */
DE_CONST(TESTSTRING, noopresponse.data);
ret = lwres_noopresponse_render(ctx, &noopresponse, &pkt, &b);
CHECK(ret, "lwres_noopresponse_render");
hexdump("rendered noop response", b.base, b.used);
/*
* Now, parse it into a new structure.
*/
lwres_buffer_first(&b);
ret = lwres_lwpacket_parseheader(&b, &pkt2);
CHECK(ret, "lwres_lwpacket_parseheader");
hexdump("parsed pkt2", &pkt2, sizeof(pkt2));
noopresponse2 = NULL;
ret = lwres_noopresponse_parse(ctx, &b, &pkt2, &noopresponse2);
CHECK(ret, "lwres_noopresponse_parse");
assert(noopresponse.datalength == noopresponse2->datalength);
assert(memcmp(noopresponse.data, noopresponse2->data,
noopresponse.datalength) == 0);
lwres_noopresponse_free(ctx, &noopresponse2);
lwres_context_freemem(ctx, b.base, b.length);
b.base = NULL;
b.length = 0;
}
int
lwres_getrrsetbyname_read(struct lwres_async_state **plas,
lwres_context_t *ctx,
struct rrsetinfo **res)
{
lwres_result_t lwresult;
lwres_grbnresponse_t *response = NULL;
char *buffer;
struct rrsetinfo *rrset = NULL;
int recvlen;
int ret, result;
unsigned int i;
lwres_buffer_t b_in;
struct lwres_async_state *las;
struct lwres_async_state **las_prev;
lwres_lwpacket_t pkt;
buffer = NULL;
buffer = CTXMALLOC(LWRES_RECVLENGTH);
if (buffer == NULL) {
return ERRSET_NOMEMORY;
}
ret = LWRES_R_SUCCESS;
lwresult = lwres_context_recv(ctx, buffer, LWRES_RECVLENGTH, &recvlen);
if (lwresult == LWRES_R_RETRY) {
ret = LWRES_R_RETRY;
goto out;
}
if (ret != LWRES_R_SUCCESS)
goto out;
lwres_buffer_init(&b_in, buffer, recvlen);
b_in.used = recvlen;
/*
* Parse the packet header.
*/
ret = lwres_lwpacket_parseheader(&b_in, &pkt);
if (ret != LWRES_R_SUCCESS)
goto out;
/*
* find an appropriate waiting las entry. This is a linear search.
* we can do MUCH better, since we control the serial number!
* do that later.
*/
las_prev = &ctx->pending;
las = ctx->pending;
while(las && las->serial != pkt.serial) {
las_prev=&las->next;
las=las->next;
}
if(las == NULL) {
/* no matching serial number! */
return(LWRES_R_RETRY);
}
/* okay, remove it from the receive queue */
*las_prev = las->next;
las->next = NULL;
las->inqueue = 0;
*plas = las;
/*
* Free what we've transmitted, long ago.
*/
CTXFREE(las->b_out.base, las->b_out.length);
las->b_out.base = NULL;
las->b_out.length = 0;
if (pkt.result != LWRES_R_SUCCESS) {
ret = pkt.result;
goto out;
}
/*
* Parse the response.
*/
ret = lwres_grbnresponse_parse(ctx, &b_in, &pkt, &response);
if (ret != LWRES_R_SUCCESS) {
out:
if (buffer != NULL)
CTXFREE(buffer, LWRES_RECVLENGTH);
if (response != NULL)
lwres_grbnresponse_free(ctx, &response);
result = lwresult_to_result(ret);
goto fail;
}
response->base = buffer;
response->baselen = LWRES_RECVLENGTH;
buffer = NULL; /* don't free this below */
lwresult = LWRES_R_SUCCESS;
rrset = sane_malloc(sizeof(struct rrsetinfo));
if (rrset == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
rrset->rri_name = NULL;
rrset->rri_rdclass = response->rdclass;
rrset->rri_rdtype = response->rdtype;
rrset->rri_ttl = response->ttl;
rrset->rri_flags = 0;
rrset->rri_nrdatas = 0;
rrset->rri_rdatas = NULL;
rrset->rri_nsigs = 0;
rrset->rri_sigs = NULL;
rrset->rri_name = sane_malloc(response->realnamelen + 1);
if (rrset->rri_name == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
strncpy(rrset->rri_name, response->realname, response->realnamelen);
rrset->rri_name[response->realnamelen] = 0;
if ((response->flags & LWRDATA_VALIDATED) != 0)
rrset->rri_flags |= RRSET_VALIDATED;
rrset->rri_nrdatas = response->nrdatas;
rrset->rri_rdatas = sane_calloc(rrset->rri_nrdatas,
sizeof(struct rdatainfo));
if (rrset->rri_rdatas == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
for (i = 0; i < rrset->rri_nrdatas; i++) {
rrset->rri_rdatas[i].rdi_length = response->rdatalen[i];
rrset->rri_rdatas[i].rdi_data =
sane_malloc(rrset->rri_rdatas[i].rdi_length);
if (rrset->rri_rdatas[i].rdi_data == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
memcpy(rrset->rri_rdatas[i].rdi_data, response->rdatas[i],
rrset->rri_rdatas[i].rdi_length);
}
rrset->rri_nsigs = response->nsigs;
rrset->rri_sigs = sane_calloc(rrset->rri_nsigs,
sizeof(struct rdatainfo));
if (rrset->rri_sigs == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
for (i = 0; i < rrset->rri_nsigs; i++) {
rrset->rri_sigs[i].rdi_length = response->siglen[i];
rrset->rri_sigs[i].rdi_data =
sane_malloc(rrset->rri_sigs[i].rdi_length);
if (rrset->rri_sigs[i].rdi_data == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
memcpy(rrset->rri_sigs[i].rdi_data, response->sigs[i],
rrset->rri_sigs[i].rdi_length);
}
lwres_grbnresponse_free(ctx, &response);
*res = rrset;
return (ERRSET_SUCCESS);
fail:
if (rrset != NULL)
lwres_freerrset(rrset);
if (response != NULL)
lwres_grbnresponse_free(ctx, &response);
return (result);
}
static void
test_noop(void) {
lwres_result_t ret;
lwres_lwpacket_t pkt, pkt2;
lwres_nooprequest_t nooprequest, *nooprequest2;
lwres_noopresponse_t noopresponse, *noopresponse2;
lwres_buffer_t b;
pkt.pktflags = 0;
pkt.serial = 0x11223344;
pkt.recvlength = 0x55667788;
pkt.result = 0;
nooprequest.datalength = strlen((char *)TESTSTRING);
nooprequest.data = TESTSTRING;
ret = lwres_nooprequest_render(ctx, &nooprequest, &pkt, &b);
CHECK(ret, "lwres_nooprequest_render");
/*
* Now, parse it into a new structure.
*/
lwres_buffer_first(&b);
ret = lwres_lwpacket_parseheader(&b, &pkt2);
CHECK(ret, "lwres_lwpacket_parseheader");
nooprequest2 = NULL;
ret = lwres_nooprequest_parse(ctx, &b, &pkt2, &nooprequest2);
CHECK(ret, "lwres_nooprequest_parse");
assert(nooprequest.datalength == nooprequest2->datalength);
assert(memcmp(nooprequest.data, nooprequest2->data,
nooprequest.datalength) == 0);
lwres_nooprequest_free(ctx, &nooprequest2);
lwres_context_freemem(ctx, b.base, b.length);
b.base = NULL;
b.length = 0;
pkt.pktflags = 0;
pkt.serial = 0x11223344;
pkt.recvlength = 0x55667788;
pkt.result = 0xdeadbeef;
noopresponse.datalength = strlen((char *)TESTSTRING);
noopresponse.data = TESTSTRING;
ret = lwres_noopresponse_render(ctx, &noopresponse, &pkt, &b);
CHECK(ret, "lwres_noopresponse_render");
/*
* Now, parse it into a new structure.
*/
lwres_buffer_first(&b);
ret = lwres_lwpacket_parseheader(&b, &pkt2);
CHECK(ret, "lwres_lwpacket_parseheader");
noopresponse2 = NULL;
ret = lwres_noopresponse_parse(ctx, &b, &pkt2, &noopresponse2);
CHECK(ret, "lwres_noopresponse_parse");
assert(noopresponse.datalength == noopresponse2->datalength);
assert(memcmp(noopresponse.data, noopresponse2->data,
noopresponse.datalength) == 0);
lwres_noopresponse_free(ctx, &noopresponse2);
lwres_context_freemem(ctx, b.base, b.length);
b.base = NULL;
b.length = 0;
}
/*% Get rdata by name. */
lwres_result_t
lwres_getrdatabyname(lwres_context_t *ctx, const char *name,
lwres_uint16_t rdclass, lwres_uint16_t rdtype,
lwres_uint32_t flags, lwres_grbnresponse_t **structp)
{
int ret;
int recvlen;
lwres_buffer_t b_in, b_out;
lwres_lwpacket_t pkt;
lwres_uint32_t serial;
char *buffer;
lwres_grbnrequest_t request;
lwres_grbnresponse_t *response;
char target_name[1024];
unsigned int target_length;
REQUIRE(ctx != NULL);
REQUIRE(name != NULL);
REQUIRE(structp != NULL && *structp == NULL);
b_in.base = NULL;
b_out.base = NULL;
response = NULL;
buffer = NULL;
serial = lwres_context_nextserial(ctx);
buffer = CTXMALLOC(LWRES_RECVLENGTH);
if (buffer == NULL) {
ret = LWRES_R_NOMEMORY;
goto out;
}
target_length = strlen(name);
if (target_length >= sizeof(target_name))
return (LWRES_R_FAILURE);
strcpy(target_name, name); /* strcpy is safe */
/*
* Set up our request and render it to a buffer.
*/
request.rdclass = rdclass;
request.rdtype = rdtype;
request.flags = flags;
request.name = target_name;
request.namelen = target_length;
pkt.pktflags = 0;
pkt.serial = serial;
pkt.result = 0;
pkt.recvlength = LWRES_RECVLENGTH;
again:
ret = lwres_grbnrequest_render(ctx, &request, &pkt, &b_out);
if (ret != LWRES_R_SUCCESS)
goto out;
ret = lwres_context_sendrecv(ctx, b_out.base, b_out.length, buffer,
LWRES_RECVLENGTH, &recvlen);
if (ret != LWRES_R_SUCCESS)
goto out;
lwres_buffer_init(&b_in, buffer, recvlen);
b_in.used = recvlen;
/*
* Parse the packet header.
*/
ret = lwres_lwpacket_parseheader(&b_in, &pkt);
if (ret != LWRES_R_SUCCESS)
goto out;
/*
* Sanity check.
*/
if (pkt.serial != serial)
goto again;
if (pkt.opcode != LWRES_OPCODE_GETRDATABYNAME)
goto again;
/*
* Free what we've transmitted
*/
CTXFREE(b_out.base, b_out.length);
b_out.base = NULL;
b_out.length = 0;
if (pkt.result != LWRES_R_SUCCESS) {
ret = pkt.result;
goto out;
}
/*
* Parse the response.
*/
ret = lwres_grbnresponse_parse(ctx, &b_in, &pkt, &response);
if (ret != LWRES_R_SUCCESS)
goto out;
response->base = buffer;
response->baselen = LWRES_RECVLENGTH;
buffer = NULL; /* don't free this below */
*structp = response;
return (LWRES_R_SUCCESS);
out:
if (b_out.base != NULL)
CTXFREE(b_out.base, b_out.length);
if (buffer != NULL)
CTXFREE(buffer, LWRES_RECVLENGTH);
if (response != NULL)
lwres_grbnresponse_free(ctx, &response);
return (ret);
}
/*% Used to perform reverse lookups. */
lwres_result_t
lwres_getnamebyaddr(lwres_context_t *ctx, lwres_uint32_t addrtype,
lwres_uint16_t addrlen, const unsigned char *addr,
lwres_gnbaresponse_t **structp)
{
lwres_gnbarequest_t request;
lwres_gnbaresponse_t *response;
int ret;
int recvlen;
lwres_buffer_t b_in, b_out;
lwres_lwpacket_t pkt;
lwres_uint32_t serial;
char *buffer;
REQUIRE(ctx != NULL);
REQUIRE(addrtype != 0);
REQUIRE(addrlen != 0);
REQUIRE(addr != NULL);
REQUIRE(structp != NULL && *structp == NULL);
b_in.base = NULL;
b_out.base = NULL;
response = NULL;
buffer = NULL;
serial = lwres_context_nextserial(ctx);
buffer = CTXMALLOC(LWRES_RECVLENGTH);
if (buffer == NULL) {
ret = LWRES_R_NOMEMORY;
goto out;
}
/*
* Set up our request and render it to a buffer.
*/
request.flags = 0;
request.addr.family = addrtype;
request.addr.length = addrlen;
memmove(request.addr.address, addr, addrlen);
pkt.pktflags = 0;
pkt.serial = serial;
pkt.result = 0;
pkt.recvlength = LWRES_RECVLENGTH;
again:
ret = lwres_gnbarequest_render(ctx, &request, &pkt, &b_out);
if (ret != LWRES_R_SUCCESS)
goto out;
ret = lwres_context_sendrecv(ctx, b_out.base, b_out.length, buffer,
LWRES_RECVLENGTH, &recvlen);
if (ret != LWRES_R_SUCCESS)
goto out;
lwres_buffer_init(&b_in, buffer, recvlen);
b_in.used = recvlen;
/*
* Parse the packet header.
*/
ret = lwres_lwpacket_parseheader(&b_in, &pkt);
if (ret != LWRES_R_SUCCESS)
goto out;
/*
* Sanity check.
*/
if (pkt.serial != serial)
goto again;
if (pkt.opcode != LWRES_OPCODE_GETNAMEBYADDR)
goto again;
/*
* Free what we've transmitted
*/
CTXFREE(b_out.base, b_out.length);
b_out.base = NULL;
b_out.length = 0;
if (pkt.result != LWRES_R_SUCCESS) {
ret = pkt.result;
goto out;
}
/*
* Parse the response.
*/
ret = lwres_gnbaresponse_parse(ctx, &b_in, &pkt, &response);
if (ret != LWRES_R_SUCCESS)
goto out;
response->base = buffer;
response->baselen = LWRES_RECVLENGTH;
buffer = NULL; /* don't free this below */
*structp = response;
return (LWRES_R_SUCCESS);
out:
if (b_out.base != NULL)
CTXFREE(b_out.base, b_out.length);
if (buffer != NULL)
CTXFREE(buffer, LWRES_RECVLENGTH);
if (response != NULL)
lwres_gnbaresponse_free(ctx, &response);
return (ret);
}
