daxi20/smartdns
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

dualstack: update cache when ipv6 not exists

Browse Source
This commit is contained in:
Nick Peng
2020-05-04 01:37:52 +08:00
parent 770ce9e8bc
commit c1f9941427
2 changed files with 20 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/dns_cache.c
View File

@@ -130,7 +130,7 @@ int dns_cache_replace(char *domain, char *cname, int cname_ttl, int ttl, dns_typ
/* lookup existing cache */
dns_cache = dns_cache_lookup(domain, qtype);
if (dns_cache == NULL) {
return 0;
return dns_cache_insert(domain, cname, cname_ttl, ttl, qtype, addr, addr_len, speed);
}
if (ttl < DNS_CACHE_TTL_MIN) {

38
src/dns_server.c
View File

@@ -2026,9 +2026,10 @@ static int _dns_server_process_cache(struct dns_request *request)
{
struct dns_cache *dns_cache = NULL;
struct dns_cache *dns_cache_A = NULL;
int ret = -1;
if (_dns_server_has_bind_flag(request, BIND_FLAG_NO_CACHE) == 0) {
goto errout;
goto out;
}
dns_cache = dns_cache_lookup(request->domain, request->qtype);
@@ -2037,16 +2038,18 @@ static int _dns_server_process_cache(struct dns_request *request)
dns_cache_A = dns_cache_lookup(request->domain, DNS_T_A);
if (dns_cache_A) {
tlog(TLOG_DEBUG, "No IPV6 Found, Force IPV4 perfered.");
dns_cache_release(dns_cache_A);
dns_cache_release(dns_cache);
return _dns_server_reply_SOA(DNS_RC_NOERROR, request);
if (dns_cache_get_ttl(dns_cache_A) == 0) {
_dns_server_prefetch_request(request->domain, request->qtype);
}
ret = _dns_server_reply_SOA(DNS_RC_NOERROR, request);
goto out;
}
}
goto errout;
goto out;
}
if (request->qtype != dns_cache->qtype) {
goto errout;
goto out;
}
if (request->dualstack_selection && request->qtype == DNS_T_AAAA) {
@@ -2055,9 +2058,8 @@ static int _dns_server_process_cache(struct dns_request *request)
if ((dns_cache_A->speed + (dns_conf_dualstack_ip_selection_threshold * 10)) < dns_cache->speed ||
dns_cache->speed < 0) {
tlog(TLOG_DEBUG, "Force IPV4 perfered.");
dns_cache_release(dns_cache_A);
dns_cache_release(dns_cache);
return _dns_server_reply_SOA(DNS_RC_NOERROR, request);
ret = _dns_server_reply_SOA(DNS_RC_NOERROR, request);
goto out_update_cache;
}
}
}
@@ -2075,7 +2077,7 @@ static int _dns_server_process_cache(struct dns_request *request)
request->has_ipv6 = 1;
break;
default:
goto errout;
goto out;
break;
}
@@ -2093,28 +2095,26 @@ static int _dns_server_process_cache(struct dns_request *request)
_dns_reply(request);
}
ret = 0;
out_update_cache:
if (dns_cache_get_ttl(dns_cache) == 0) {
_dns_server_prefetch_request(request->domain, request->qtype);
} else {
dns_cache_update(dns_cache);
}
dns_cache_release(dns_cache);
if (dns_cache_A) {
dns_cache_release(dns_cache_A);
dns_cache_A = NULL;
}
return 0;
errout:
out:
if (dns_cache) {
dns_cache_release(dns_cache);
}
if (dns_cache_A) {
dns_cache_release(dns_cache_A);
dns_cache_A = NULL;
}
return -1;
return ret;
}
static void _dns_server_request_set_client(struct dns_request *request, struct dns_server_conn_head *conn)