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dns_server: fix bogus-nxdomain issue.

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This commit is contained in:
Nick Peng
2023-07-26 22:40:26 +08:00
parent 93a8b87c17
commit 8d3a62c568
2 changed files with 64 additions and 64 deletions
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86
src/dns_client.c
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@@ -443,8 +443,8 @@ static struct addrinfo *_dns_client_getaddr(const char *host, char *port, int ty
ret = getaddrinfo(host, port, &hints, &result);
if (ret != 0) {
tlog(TLOG_ERROR, "get addr info failed. %s\n", gai_strerror(ret));
tlog(TLOG_ERROR, "host = %s, port = %s, type = %d, protocol = %d", host, port, type, protocol);
tlog(TLOG_WARN, "get addr info failed. %s\n", gai_strerror(ret));
tlog(TLOG_WARN, "host = %s, port = %s, type = %d, protocol = %d", host, port, type, protocol);
goto errout;
}
@@ -1403,6 +1403,8 @@ static int _dns_client_add_server_pending(char *server_ip, char *server_host, in
struct client_dns_server_flags *flags, int is_pending)
{
int ret = 0;
struct addrinfo *gai = NULL;
char server_ip_tmp[DNS_HOSTNAME_LEN] = {0};
if (server_type >= DNS_SERVER_TYPE_END) {
tlog(TLOG_ERROR, "server type is invalid.");
@@ -1415,6 +1417,22 @@ static int _dns_client_add_server_pending(char *server_ip, char *server_host, in
tlog(TLOG_INFO, "add pending server %s", server_ip);
return 0;
}
} else if (check_is_ipaddr(server_ip) && is_pending == 0) {
gai = _dns_client_getaddr(server_ip, 0, SOCK_STREAM, 0);
if (gai == NULL) {
return -1;
}
if (get_host_by_addr(server_ip_tmp, sizeof(server_ip_tmp), gai->ai_addr) != NULL) {
tlog(TLOG_INFO, "resolve %s to %s.", server_ip, server_ip_tmp);
server_ip = server_ip_tmp;
} else {
tlog(TLOG_INFO, "resolve %s failed.", server_ip);
freeaddrinfo(gai);
return -1;
}
freeaddrinfo(gai);
}
/* add server */
@@ -1784,13 +1802,8 @@ static int _dns_client_create_socket_udp_proxy(struct dns_server_info *server_in
ret = proxy_conn_connect(proxy);
if (ret != 0) {
if (errno == ENETUNREACH || errno == EHOSTUNREACH || errno == EPERM || errno == EACCES) {
tlog(TLOG_DEBUG, "connect %s failed, %s", server_info->ip, strerror(errno));
goto errout;
}
if (errno != EINPROGRESS) {
tlog(TLOG_ERROR, "connect %s failed, %s", server_info->ip, strerror(errno));
tlog(TLOG_DEBUG, "connect %s failed, %s", server_info->ip, strerror(errno));
goto errout;
}
}
@@ -1844,14 +1857,8 @@ static int _dns_client_create_socket_udp(struct dns_server_info *server_info)
server_info->status = DNS_SERVER_STATUS_CONNECTIONLESS;
if (connect(fd, &server_info->addr, server_info->ai_addrlen) != 0) {
if (errno == ENETUNREACH || errno == EHOSTUNREACH || errno == ECONNREFUSED || errno == EPERM ||
errno == EACCES) {
tlog(TLOG_INFO, "connect %s failed, %s", server_info->ip, strerror(errno));
goto errout;
}
if (errno != EINPROGRESS) {
tlog(TLOG_ERROR, "connect %s failed, %s", server_info->ip, strerror(errno));
tlog(TLOG_DEBUG, "connect %s failed, %s", server_info->ip, strerror(errno));
goto errout;
}
}
@@ -1951,13 +1958,8 @@ static int _DNS_client_create_socket_tcp(struct dns_server_info *server_info)
}
if (ret != 0) {
if (errno == ENETUNREACH || errno == EHOSTUNREACH || errno == ECONNREFUSED) {
tlog(TLOG_DEBUG, "connect %s failed, %s", server_info->ip, strerror(errno));
goto errout;
}
if (errno != EINPROGRESS) {
tlog(TLOG_ERROR, "connect %s failed, %s", server_info->ip, strerror(errno));
tlog(TLOG_DEBUG, "connect %s failed, %s", server_info->ip, strerror(errno));
goto errout;
}
}
@@ -2065,13 +2067,8 @@ static int _DNS_client_create_socket_tls(struct dns_server_info *server_info, ch
}
if (ret != 0) {
if (errno == ENETUNREACH || errno == EHOSTUNREACH || errno == ECONNREFUSED) {
tlog(TLOG_DEBUG, "connect %s failed, %s", server_info->ip, strerror(errno));
goto errout;
}
if (errno != EINPROGRESS) {
tlog(TLOG_ERROR, "connect %s failed, %s", server_info->ip, strerror(errno));
tlog(TLOG_DEBUG, "connect %s failed, %s", server_info->ip, strerror(errno));
goto errout;
}
}
@@ -4032,6 +4029,25 @@ static void _dns_client_add_pending_servers(void)
int add_success = 0;
char *dnsserver_ip = NULL;
/* if has no bootstrap DNS, just call getaddrinfo to get address */
if (dns_client_has_bootstrap_dns == 0) {
list_del_init(&pending->retry_list);
_dns_client_server_pending_release(pending);
pending->retry_cnt++;
if (_dns_client_add_pendings(pending, pending->host) != 0) {
pthread_mutex_unlock(&pending_server_mutex);
tlog(TLOG_INFO, "add pending DNS server %s from resolv.conf failed, retry %d...", pending->host,
pending->retry_cnt - 1);
if (pending->retry_cnt - 1 > DNS_PENDING_SERVER_RETRY) {
tlog(TLOG_WARN, "add pending DNS server %s from resolv.conf failed, exit...", pending->host);
exit(1);
}
continue;
}
_dns_client_server_pending_release(pending);
continue;
}
if (pending->query_v4 == 0) {
pending->query_v4 = 1;
_dns_client_server_pending_get(pending);
@@ -4093,22 +4109,6 @@ static void _dns_client_add_pending_servers(void)
pending->query_v4 = 0;
pending->query_v6 = 0;
}
/* if has no bootstrap DNS, just call getaddrinfo to get address */
if (dns_client_has_bootstrap_dns == 0) {
if (_dns_client_add_pendings(pending, pending->host) != 0) {
pthread_mutex_unlock(&pending_server_mutex);
tlog(TLOG_INFO, "add pending DNS server %s from resolv.conf failed, retry %d...", pending->host,
pending->retry_cnt - 1);
if (pending->retry_cnt - 1 > DNS_PENDING_SERVER_RETRY) {
tlog(TLOG_WARN, "add pending DNS server %s from resolv.conf failed, exit...", pending->host);
exit(1);
}
continue;
}
_dns_client_server_pending_release(pending);
}
}
}