static int query(knot_layer_t *ctx, knot_pkt_t *pkt)
{
struct kr_request *param = ctx->data;
struct kr_query *qry = kr_rplan_current(¶m->rplan);
if (!qry || ctx->state & (KNOT_STATE_DONE|KNOT_STATE_FAIL)) {
return ctx->state;
}
/* Find a matching name */
struct kr_module *module = ctx->api->data;
struct kr_zonecut *hint_map = module->data;
pack_t *pack = kr_zonecut_find(hint_map, qry->sname);
if (!pack || pack->len == 0) {
return ctx->state;
}
/* Write to packet */
int ret = answer_query(pkt, pack, qry);
if (ret != 0) {
return ctx->state;
}
DEBUG_MSG(qry, "<= answered from hints\n");
qry->flags |= QUERY_CACHED|QUERY_NO_MINIMIZE;
pkt->parsed = pkt->size;
knot_wire_set_qr(pkt->wire);
return KNOT_STATE_DONE;
}
_public_
int knot_pkt_init_response(knot_pkt_t *pkt, const knot_pkt_t *query)
{
if (pkt == NULL || query == NULL) {
return KNOT_EINVAL;
}
/* Header + question size. */
size_t base_size = KNOT_WIRE_HEADER_SIZE + knot_pkt_question_size(query);
if (base_size > pkt->max_size) {
return KNOT_ESPACE;
}
pkt->size = base_size;
pkt->qname_size = query->qname_size;
memcpy(pkt->wire, query->wire, base_size);
/* Update size and flags. */
knot_wire_set_qr(pkt->wire);
knot_wire_clear_tc(pkt->wire);
knot_wire_clear_ad(pkt->wire);
knot_wire_clear_ra(pkt->wire);
knot_wire_clear_aa(pkt->wire);
/* Clear payload. */
pkt_clear_payload(pkt);
return KNOT_EOK;
}
static void* responder_thread(void *arg)
{
int fd = *((int *)arg);
uint8_t buf[KNOT_WIRE_MAX_PKTSIZE];
while(true) {
int client = accept(fd, NULL, NULL);
if (client < 0) {
break;
}
int len = tcp_recv_msg(client, buf, sizeof(buf), NULL);
if (len < KNOT_WIRE_HEADER_SIZE) {
close(client);
break;
}
knot_wire_set_qr(buf);
tcp_send_msg(client, buf, len, NULL);
close(client);
}
return NULL;
}
int main(int argc, char *argv[])
{
plan(25);
/* Create memory pool context. */
int ret = 0;
knot_mm_t mm;
mm_ctx_mempool(&mm, MM_DEFAULT_BLKSIZE);
/* Create names and data. */
knot_dname_t* dnames[NAMECOUNT] = {0};
knot_rrset_t* rrsets[NAMECOUNT] = {0};
for (unsigned i = 0; i < NAMECOUNT; ++i) {
dnames[i] = knot_dname_from_str_alloc(g_names[i]);
}
uint8_t *edns_str = (uint8_t *)"ab";
/* Create OPT RR. */
knot_rrset_t opt_rr;
ret = knot_edns_init(&opt_rr, 1024, 0, 0, &mm);
if (ret != KNOT_EOK) {
skip_block(25, "Failed to initialize OPT RR.");
return 0;
}
/* Add NSID */
ret = knot_edns_add_option(&opt_rr, KNOT_EDNS_OPTION_NSID,
strlen((char *)edns_str), edns_str, &mm);
if (ret != KNOT_EOK) {
knot_rrset_clear(&opt_rr, &mm);
skip_block(25, "Failed to add NSID to OPT RR.");
return 0;
}
/*
* Packet writer tests.
*/
/* Create packet. */
knot_pkt_t *out = knot_pkt_new(NULL, MM_DEFAULT_BLKSIZE, &mm);
ok(out != NULL, "pkt: new");
/* Mark as response (not part of the test). */
knot_wire_set_qr(out->wire);
/* Secure packet. */
const char *tsig_secret = "abcd";
knot_tsig_key_t tsig_key;
tsig_key.algorithm = DNSSEC_TSIG_HMAC_MD5;
tsig_key.name = dnames[0];
tsig_key.secret.data = (uint8_t *)strdup(tsig_secret);
tsig_key.secret.size = strlen(tsig_secret);
ret = knot_pkt_reserve(out, knot_tsig_wire_maxsize(&tsig_key));
ok(ret == KNOT_EOK, "pkt: set TSIG key");
/* Write question. */
ret = knot_pkt_put_question(out, dnames[0], KNOT_CLASS_IN, KNOT_RRTYPE_A);
ok(ret == KNOT_EOK, "pkt: put question");
/* Add OPT to packet (empty NSID). */
ret = knot_pkt_reserve(out, knot_edns_wire_size(&opt_rr));
ok(ret == KNOT_EOK, "pkt: reserve OPT RR");
/* Begin ANSWER section. */
ret = knot_pkt_begin(out, KNOT_ANSWER);
ok(ret == KNOT_EOK, "pkt: begin ANSWER");
/* Write ANSWER section. */
rrsets[0] = knot_rrset_new(dnames[0], KNOT_RRTYPE_A, KNOT_CLASS_IN, NULL);
knot_dname_free(&dnames[0], NULL);
knot_rrset_add_rdata(rrsets[0], RDVAL(0), RDLEN(0), TTL, NULL);
ret = knot_pkt_put(out, KNOT_COMPR_HINT_QNAME, rrsets[0], 0);
ok(ret == KNOT_EOK, "pkt: write ANSWER");
/* Begin AUTHORITY. */
ret = knot_pkt_begin(out, KNOT_AUTHORITY);
ok(ret == KNOT_EOK, "pkt: begin AUTHORITY");
/* Write rest to AUTHORITY. */
ret = KNOT_EOK;
for (unsigned i = 1; i < NAMECOUNT; ++i) {
rrsets[i] = knot_rrset_new(dnames[i], KNOT_RRTYPE_NS, KNOT_CLASS_IN, NULL);
knot_dname_free(&dnames[i], NULL);
knot_rrset_add_rdata(rrsets[i], RDVAL(i), RDLEN(i), TTL, NULL);
ret |= knot_pkt_put(out, KNOT_COMPR_HINT_NONE, rrsets[i], 0);
}
ok(ret == KNOT_EOK, "pkt: write AUTHORITY(%u)", NAMECOUNT - 1);
/* Begin ADDITIONALS */
ret = knot_pkt_begin(out, KNOT_ADDITIONAL);
ok(ret == KNOT_EOK, "pkt: begin ADDITIONALS");
/* Encode OPT RR. */
ret = knot_pkt_put(out, KNOT_COMPR_HINT_NONE, &opt_rr, 0);
ok(ret == KNOT_EOK, "pkt: write OPT RR");
/*
* Packet reader tests.
*/
/* Create new packet from query packet. */
knot_pkt_t *in = knot_pkt_new(out->wire, out->size, &out->mm);
ok(in != NULL, "pkt: create packet for parsing");
/* Read packet header. */
ret = knot_pkt_parse_question(in);
ok(ret == KNOT_EOK, "pkt: read header");
/* Read packet payload. */
ret = knot_pkt_parse_payload(in, 0);
ok(ret == KNOT_EOK, "pkt: read payload");
/* Compare parsed packet to written packet. */
packet_match(in, out);
/*
* Copied packet tests.
*/
knot_pkt_t *copy = knot_pkt_new(NULL, in->max_size, &in->mm);
ret = knot_pkt_copy(copy, in);
ok(ret == KNOT_EOK, "pkt: create packet copy");
/* Compare copied packet to original. */
packet_match(in, copy);
/* Free packets. */
knot_pkt_free(©);
knot_pkt_free(&out);
knot_pkt_free(&in);
ok(in == NULL && out == NULL && copy == NULL, "pkt: free");
/* Free extra data. */
for (unsigned i = 0; i < NAMECOUNT; ++i) {
knot_rrset_free(&rrsets[i], NULL);
}
free(tsig_key.secret.data);
mp_delete((struct mempool *)mm.ctx);
return 0;
}
int main(int argc, char *argv[])
{
plan(8*6 + 3); /* exec_query = 6 TAP tests */
/* Create processing context. */
knot_process_t query_ctx;
memset(&query_ctx, 0, sizeof(knot_process_t));
mm_ctx_mempool(&query_ctx.mm, sizeof(knot_pkt_t));
/* Create name server. */
server_t server;
server_init(&server);
server.opt_rr = knot_edns_new();
knot_edns_set_version(server.opt_rr, EDNS_VERSION);
knot_edns_set_payload(server.opt_rr, 4096);
conf()->identity = strdup("bogus.ns");
conf()->version = strdup("0.11");
/* Insert root zone. */
create_root_zone(&server, &query_ctx.mm);
zone_t *zone = knot_zonedb_find(server.zone_db, ROOT_DNAME);
/* Prepare. */
int state = NS_PROC_FAIL;
uint8_t query_wire[KNOT_WIRE_MAX_PKTSIZE];
uint16_t query_len = KNOT_WIRE_MAX_PKTSIZE;
knot_pkt_t *query = knot_pkt_new(query_wire, query_len, &query_ctx.mm);
/* Create query processing parameter. */
struct sockaddr_storage ss;
memset(&ss, 0, sizeof(struct sockaddr_storage));
sockaddr_set(&ss, AF_INET, "127.0.0.1", 53);
struct process_query_param param = {0};
param.query_source = &ss;
param.server = &server;
/* Query processor (CH zone) */
state = knot_process_begin(&query_ctx, ¶m, NS_PROC_QUERY);
const uint8_t chaos_dname[] = "\2""id""\6""server"; /* id.server */
knot_pkt_clear(query);
knot_pkt_put_question(query, chaos_dname, KNOT_CLASS_CH, KNOT_RRTYPE_TXT);
exec_query(&query_ctx, "CH TXT", query->wire, query->size, KNOT_RCODE_NOERROR);
/* Query processor (valid input). */
state = knot_process_reset(&query_ctx);
knot_pkt_clear(query);
knot_pkt_put_question(query, ROOT_DNAME, KNOT_CLASS_IN, KNOT_RRTYPE_SOA);
exec_query(&query_ctx, "IN/root", query->wire, query->size, KNOT_RCODE_NOERROR);
/* Query processor (-1 bytes, not enough data). */
state = knot_process_reset(&query_ctx);
exec_query(&query_ctx, "IN/few-data", query->wire, query->size - 1, KNOT_RCODE_FORMERR);
/* Query processor (+1 bytes trailing). */
state = knot_process_reset(&query_ctx);
query->wire[query->size] = '\1'; /* Initialize the "garbage" value. */
exec_query(&query_ctx, "IN/trail-garbage", query->wire, query->size + 1, KNOT_RCODE_FORMERR);
/* Forge NOTIFY query from SOA query. */
state = knot_process_reset(&query_ctx);
knot_wire_set_opcode(query->wire, KNOT_OPCODE_NOTIFY);
exec_query(&query_ctx, "IN/notify", query->wire, query->size, KNOT_RCODE_NOTAUTH);
/* Forge AXFR query. */
knot_process_reset(&query_ctx);
knot_pkt_clear(query);
knot_pkt_put_question(query, ROOT_DNAME, KNOT_CLASS_IN, KNOT_RRTYPE_AXFR);
exec_query(&query_ctx, "IN/axfr", query->wire, query->size, KNOT_RCODE_NOTAUTH);
/* Forge IXFR query (badly formed, no SOA in AUTHORITY section). */
knot_process_reset(&query_ctx);
knot_pkt_clear(query);
knot_pkt_put_question(query, ROOT_DNAME, KNOT_CLASS_IN, KNOT_RRTYPE_IXFR);
exec_query(&query_ctx, "IN/ixfr-formerr", query->wire, query->size, KNOT_RCODE_FORMERR);
/* Forge IXFR query (well formed). */
knot_process_reset(&query_ctx);
/* Append SOA RR. */
knot_rrset_t soa_rr = node_rrset(zone->contents->apex, KNOT_RRTYPE_SOA);
knot_pkt_begin(query, KNOT_AUTHORITY);
knot_pkt_put(query, COMPR_HINT_NONE, &soa_rr, 0);
exec_query(&query_ctx, "IN/ixfr", query->wire, query->size, KNOT_RCODE_NOTAUTH);
/* \note Tests below are not possible without proper zone and zone data. */
/* #189 Process UPDATE query. */
/* #189 Process AXFR client. */
/* #189 Process IXFR client. */
/* Query processor (smaller than DNS header, ignore). */
state = knot_process_reset(&query_ctx);
knot_pkt_clear(query);
knot_pkt_put_question(query, ROOT_DNAME, KNOT_CLASS_IN, KNOT_RRTYPE_SOA);
state = knot_process_in(query->wire, KNOT_WIRE_HEADER_SIZE - 1, &query_ctx);
ok(state == NS_PROC_NOOP, "ns: IN/less-than-header query ignored");
/* Query processor (response, ignore). */
state = knot_process_reset(&query_ctx);
knot_wire_set_qr(query->wire);
state = knot_process_in(query->wire, query->size, &query_ctx);
ok(state == NS_PROC_NOOP, "ns: IN/less-than-header query ignored");
/* Finish. */
state = knot_process_finish(&query_ctx);
ok(state == NS_PROC_NOOP, "ns: processing end" );
/* Cleanup. */
mp_delete((struct mempool *)query_ctx.mm.ctx);
server_deinit(&server);
return 0;
}
int main(int argc, char *argv[])
{
plan(8*6 + 4); /* exec_query = 6 TAP tests */
knot_mm_t mm;
mm_ctx_mempool(&mm, MM_DEFAULT_BLKSIZE);
/* Create processing context. */
knot_layer_t proc;
memset(&proc, 0, sizeof(knot_layer_t));
proc.mm = &mm;
/* Create fake server environment. */
server_t server;
int ret = create_fake_server(&server, proc.mm);
ok(ret == KNOT_EOK, "ns: fake server initialization");
zone_t *zone = knot_zonedb_find(server.zone_db, ROOT_DNAME);
/* Prepare. */
knot_pkt_t *query = knot_pkt_new(NULL, KNOT_WIRE_MAX_PKTSIZE, proc.mm);
/* Create query processing parameter. */
struct sockaddr_storage ss;
memset(&ss, 0, sizeof(struct sockaddr_storage));
sockaddr_set(&ss, AF_INET, "127.0.0.1", 53);
struct process_query_param param = {0};
param.remote = &ss;
param.server = &server;
/* Query processor (CH zone) */
knot_layer_begin(&proc, NS_PROC_QUERY, ¶m);
knot_pkt_clear(query);
knot_pkt_put_question(query, IDSERVER_DNAME, KNOT_CLASS_CH, KNOT_RRTYPE_TXT);
exec_query(&proc, "CH TXT", query, KNOT_RCODE_NOERROR);
/* Query processor (valid input). */
knot_layer_reset(&proc);
knot_pkt_clear(query);
knot_pkt_put_question(query, ROOT_DNAME, KNOT_CLASS_IN, KNOT_RRTYPE_SOA);
exec_query(&proc, "IN/root", query, KNOT_RCODE_NOERROR);
/* Query processor (-1 bytes, not enough data). */
knot_layer_reset(&proc);
query->size -= 1;
exec_query(&proc, "IN/few-data", query, KNOT_RCODE_FORMERR);
query->size += 1;
/* Query processor (+1 bytes trailing). */
knot_layer_reset(&proc);
query->wire[query->size] = '\1'; /* Initialize the "garbage" value. */
query->size += 1;
exec_query(&proc, "IN/trail-garbage", query, KNOT_RCODE_FORMERR);
query->size -= 1;
/* Forge NOTIFY query from SOA query. */
knot_layer_reset(&proc);
knot_wire_set_opcode(query->wire, KNOT_OPCODE_NOTIFY);
exec_query(&proc, "IN/notify", query, KNOT_RCODE_NOTAUTH);
/* Forge AXFR query. */
knot_layer_reset(&proc);
knot_pkt_clear(query);
knot_pkt_put_question(query, ROOT_DNAME, KNOT_CLASS_IN, KNOT_RRTYPE_AXFR);
exec_query(&proc, "IN/axfr", query, KNOT_RCODE_NOTAUTH);
/* Forge IXFR query (badly formed, no SOA in AUTHORITY section). */
knot_layer_reset(&proc);
knot_pkt_clear(query);
knot_pkt_put_question(query, ROOT_DNAME, KNOT_CLASS_IN, KNOT_RRTYPE_IXFR);
exec_query(&proc, "IN/ixfr-formerr", query, KNOT_RCODE_FORMERR);
/* Forge IXFR query (well formed). */
knot_layer_reset(&proc);
knot_pkt_clear(query);
knot_pkt_put_question(query, ROOT_DNAME, KNOT_CLASS_IN, KNOT_RRTYPE_IXFR);
/* Append SOA RR. */
knot_rrset_t soa_rr = node_rrset(zone->contents->apex, KNOT_RRTYPE_SOA);
knot_pkt_begin(query, KNOT_AUTHORITY);
knot_pkt_put(query, KNOT_COMPR_HINT_NONE, &soa_rr, 0);
exec_query(&proc, "IN/ixfr", query, KNOT_RCODE_NOTAUTH);
/* \note Tests below are not possible without proper zone and zone data. */
/* #189 Process UPDATE query. */
/* #189 Process AXFR client. */
/* #189 Process IXFR client. */
/* Query processor (smaller than DNS header, ignore). */
knot_layer_reset(&proc);
knot_pkt_clear(query);
knot_pkt_put_question(query, ROOT_DNAME, KNOT_CLASS_IN, KNOT_RRTYPE_SOA);
size_t orig_query_size = query->size;
query->size = KNOT_WIRE_HEADER_SIZE - 1;
int state = knot_layer_consume(&proc, query);
ok(state == KNOT_STATE_NOOP, "ns: IN/less-than-header query ignored");
query->size = orig_query_size;
/* Query processor (response, ignore). */
knot_layer_reset(&proc);
knot_wire_set_qr(query->wire);
state = knot_layer_consume(&proc, query);
ok(state == KNOT_STATE_NOOP, "ns: IN/less-than-header query ignored");
/* Finish. */
state = knot_layer_finish(&proc);
ok(state == KNOT_STATE_NOOP, "ns: processing end" );
/* Cleanup. */
mp_delete((struct mempool *)mm.ctx);
server_deinit(&server);
conf_free(conf());
return 0;
}
