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feature: support lookup local network host name or ip via mDNS

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This commit is contained in:
Nick Peng
2023-12-22 22:39:14 +08:00
parent 33ee73cbf2
commit c67031eb7c
13 changed files with 425 additions and 46 deletions
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20
src/dns_conf.c
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@@ -162,6 +162,7 @@ struct dns_ipset_names dns_conf_ipset_no_speed;
int dns_conf_nftset_timeout_enable;
struct dns_nftset_names dns_conf_nftset_no_speed;
int dns_conf_nftset_debug_enable;
int dns_conf_mdns_lookup;
char dns_conf_user[DNS_CONF_USERNAME_LEN];
@@ -3967,16 +3968,15 @@ static struct dns_hosts *_dns_conf_get_hosts(const char *hostname, int dns_type)
{
uint32_t key = 0;
struct dns_hosts *host = NULL;
char hostname_lower[DNS_MAX_CNAME_LEN];
key = hash_string(to_lower_case(hostname_lower, hostname, DNS_MAX_CNAME_LEN));
key = hash_string_case(hostname);
key = jhash(&dns_type, sizeof(dns_type), key);
hash_for_each_possible(dns_hosts_table.hosts, host, node, key)
{
if (host->dns_type != dns_type) {
continue;
}
if (strncmp(host->domain, hostname_lower, DNS_MAX_CNAME_LEN) != 0) {
if (strncasecmp(host->domain, hostname, DNS_MAX_CNAME_LEN) != 0) {
continue;
}
@@ -3988,7 +3988,7 @@ static struct dns_hosts *_dns_conf_get_hosts(const char *hostname, int dns_type)
goto errout;
}
safe_strncpy(host->domain, hostname_lower, DNS_MAX_CNAME_LEN);
safe_strncpy(host->domain, hostname, DNS_MAX_CNAME_LEN);
host->dns_type = dns_type;
host->is_soa = 1;
hash_add(dns_hosts_table.hosts, &host->node, key);
@@ -4275,6 +4275,15 @@ static void _config_setup_smartdns_domain(void)
_config_domain_rule_flag_set("smartdns", DOMAIN_FLAG_SMARTDNS_DOMAIN, 0);
}
static int _dns_conf_setup_mdns(void)
{
if (dns_conf_mdns_lookup != 1) {
return 0;
}
return _conf_domain_rule_nameserver(DNS_SERVER_GROUP_LOCAL, DNS_SERVER_GROUP_MDNS);
}
static struct config_item _config_item[] = {
CONF_STRING("server-name", (char *)dns_conf_server_name, DNS_MAX_SERVER_NAME_LEN),
CONF_YESNO("resolv-hostname", &dns_conf_resolv_hostname),
@@ -4289,6 +4298,7 @@ static struct config_item _config_item[] = {
CONF_CUSTOM("server-tcp", _config_server_tcp, NULL),
CONF_CUSTOM("server-tls", _config_server_tls, NULL),
CONF_CUSTOM("server-https", _config_server_https, NULL),
CONF_YESNO("mdns-lookup", &dns_conf_mdns_lookup),
CONF_CUSTOM("nameserver", _config_nameserver, NULL),
CONF_YESNO("expand-ptr-from-address", &dns_conf_expand_ptr_from_address),
CONF_CUSTOM("address", _config_address, NULL),
@@ -4728,6 +4738,8 @@ static int _dns_conf_load_post(void)
_dns_conf_auto_set_cache_size();
_dns_conf_setup_mdns();
if (dns_conf_cachesize == 0 && dns_conf_response_mode == DNS_RESPONSE_MODE_FASTEST_RESPONSE) {
dns_conf_response_mode = DNS_RESPONSE_MODE_FASTEST_IP;
tlog(TLOG_WARN, "force set response to %s as cache size is 0",