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server: strict result, discard result without query type

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This commit is contained in:
Nick Peng
2022-02-17 22:56:13 +08:00
parent ee9059bb37
commit 0652316e98
1 changed files with 12 additions and 5 deletions
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17
src/dns_server.c
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@@ -936,11 +936,6 @@ static int _dns_server_request_complete(struct dns_request *request)
return 0;
}
/* if passthrouth, return */
if (request->passthrough) {
return 0;
}
if (request->qtype == DNS_T_A) {
if (_dns_server_request_complete_A(request) != 0) {
tlog(TLOG_ERROR, "complete DNS A failed.");
@@ -1062,6 +1057,9 @@ static void _dns_server_select_possible_ipaddress(struct dns_request *request)
static void _dns_server_delete_request(struct dns_request *request)
{
if (request->conn) {
if (atomic_read(&request->notified) == 0) {
_dns_server_request_complete(request);
}
_dns_server_conn_release(request->conn);
}
pthread_mutex_destroy(&request->ip_map_lock);
@@ -1667,6 +1665,7 @@ static int _dns_server_passthrough_rule_check(struct dns_request *request, char
int j = 0;
struct dns_rrs *rrs = NULL;
int ip_check_result = 0;
int is_result_strict = 0;
if (packet->head.rcode != DNS_RC_NOERROR && packet->head.rcode != DNS_RC_NXDOMAIN) {
if (request->rcode == DNS_RC_SERVFAIL) {
@@ -1680,6 +1679,10 @@ static int _dns_server_passthrough_rule_check(struct dns_request *request, char
for (j = 1; j < DNS_RRS_END; j++) {
rrs = dns_get_rrs_start(packet, j, &rr_count);
for (i = 0; i < rr_count && rrs; i++, rrs = dns_get_rrs_next(packet, rrs)) {
if (rrs->type == request->qtype || rrs->type == DNS_T_SOA) {
is_result_strict = 1;
}
switch (rrs->type) {
case DNS_T_A: {
unsigned char addr[4];
@@ -1740,6 +1743,10 @@ static int _dns_server_passthrough_rule_check(struct dns_request *request, char
}
}
if (is_result_strict == 0) {
return 0;
}
return -1;
}