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Add force AAAA SOA feature

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This commit is contained in:
Nick Peng
2018-10-11 23:57:42 +08:00
parent eeb3f5fd75
commit f68e4eda1c
5 changed files with 45 additions and 1 deletions
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14
src/conf.c
View File

@@ -29,6 +29,7 @@ art_tree dns_conf_address;
int dns_conf_rr_ttl;
int dns_conf_rr_ttl_min;
int dns_conf_rr_ttl_max;
int dns_conf_force_AAAA_SOA;
int load_conf_file(const char *file);
@@ -224,6 +225,18 @@ int config_cache_prefetch_domain(char *value)
return 0;
}
int config_force_AAAA_SOA(char *value)
{
/* read dns cache size */
if (strncmp("yes", value, sizeof("yes")) == 0 || strncmp("YES", value, sizeof("YES")) == 0) {
dns_conf_force_AAAA_SOA = 1;
} else if (strncmp("no", value, sizeof("no")) == 0 || strncmp("NO", value, sizeof("NO")) == 0) {
dns_conf_force_AAAA_SOA = 0;
}
return 0;
}
int config_log_level(char *value)
{
/* read log level and set */
@@ -467,6 +480,7 @@ struct config_item config_item[] = {
{"rr-ttl", config_rr_ttl},
{"rr-ttl-min", config_rr_ttl_min},
{"rr-ttl-max", config_rr_ttl_max},
{"force-AAAA-SOA", config_force_AAAA_SOA},
{"bogus-nxdomain", conf_bogus_nxdomain},
{"conf-file", config_addtional_file},
};

1
src/conf.h
View File

@@ -63,6 +63,7 @@ extern art_tree dns_conf_address;
extern int dns_conf_rr_ttl;
extern int dns_conf_rr_ttl_min;
extern int dns_conf_rr_ttl_max;
extern int dns_conf_force_AAAA_SOA;
int dns_bogus_nxdomain_exists(unsigned char *ip, dns_type_t addr_type);

29
src/dns_server.c
View File

@@ -541,10 +541,11 @@ static int _dns_server_process_answer(struct dns_request *request, char *domain,
int j = 0;
struct dns_rrs *rrs = NULL;
if (packet->head.rcode != DNS_RC_NOERROR) {
if (packet->head.rcode != DNS_RC_NOERROR && packet->head.rcode != DNS_RC_NXDOMAIN) {
if (request->rcode == DNS_RC_SERVFAIL) {
request->rcode = packet->head.rcode;
}
tlog(TLOG_DEBUG, "inquery failed, %s, rcode = %d, id = %d\n", domain, packet->head.rcode, packet->head.id);
return -1;
}
@@ -793,6 +794,27 @@ errout:
return -1;
}
static int _dns_server_reply_SOA(int rcode, struct dns_request *request, struct dns_packet *packet)
{
struct dns_soa *soa;
request->rcode = rcode;
request->has_soa = 1;
soa = &request->soa;
strcpy(soa->mname, "a.gtld-servers.net");
strcpy(soa->rname, "nstld.verisign-grs.com");
soa->serial = 1800;
soa->refresh = 1800;
soa->retry = 900;
soa->expire = 604800;
soa->minimum = 86400;
_dns_reply(request);
return 0;
}
static void _dns_server_log_rule(char *domain, unsigned char *rule_key, int rule_key_len)
{
char rule_name[DNS_MAX_CNAME_LEN];
@@ -997,6 +1019,11 @@ static int _dns_server_recv(unsigned char *inpacket, int inpacket_len, struct so
case DNS_T_A:
break;
case DNS_T_AAAA:
if (dns_conf_force_AAAA_SOA == 1) {
_dns_server_reply_SOA(DNS_RC_NOERROR, request, packet);
free(request);
return 0;
}
break;
default:
tlog(TLOG_DEBUG, "unsupport qtype: %d, domain: %s", qtype, request->domain);