static int
cert_updater_update(ProxyContext * const proxy_context)
{
CertUpdater *cert_updater = &proxy_context->cert_updater;
DNSCRYPT_PROXY_CERTS_UPDATE_START();
if (cert_updater->evdns_base != NULL) {
evdns_base_free(cert_updater->evdns_base, 0);
}
if ((cert_updater->evdns_base =
evdns_base_new(proxy_context->event_loop, 0)) == NULL) {
return -1;
}
if (evdns_base_nameserver_sockaddr_add(cert_updater->evdns_base,
(struct sockaddr *)
&proxy_context->resolver_sockaddr,
proxy_context->resolver_sockaddr_len,
DNS_QUERY_NO_SEARCH) != 0) {
return -1;
}
if (proxy_context->tcp_only != 0) {
(void) evdns_base_nameserver_ip_add(cert_updater->evdns_base,
proxy_context->resolver_ip);
}
if (evdns_base_resolve_txt(cert_updater->evdns_base,
proxy_context->provider_name,
DNS_QUERY_NO_SEARCH,
cert_query_cb,
proxy_context) == NULL) {
return -1;
}
return 0;
}
static void
dns_server(void)
{
evutil_socket_t sock=-1;
struct sockaddr_in my_addr;
struct sockaddr_storage ss;
ev_socklen_t slen;
struct evdns_server_port *port=NULL;
struct in_addr resolve_addr;
struct in6_addr resolve_addr6;
struct evdns_base *base=NULL;
struct evdns_request *req=NULL;
dns_ok = 1;
base = evdns_base_new(NULL, 0);
/* Now configure a nameserver port. */
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock<0) {
tt_abort_perror("socket");
}
evutil_make_socket_nonblocking(sock);
memset(&my_addr, 0, sizeof(my_addr));
my_addr.sin_family = AF_INET;
my_addr.sin_port = 0; /* kernel picks */
my_addr.sin_addr.s_addr = htonl(0x7f000001UL);
if (bind(sock, (struct sockaddr*)&my_addr, sizeof(my_addr)) < 0) {
tt_abort_perror("bind");
}
slen = sizeof(ss);
if (getsockname(sock, (struct sockaddr*)&ss, &slen) < 0) {
tt_abort_perror("getsockname");
}
port = evdns_add_server_port(sock, 0, dns_server_request_cb, NULL);
/* Add ourself as the only nameserver, and make sure we really are
* the only nameserver. */
evdns_base_nameserver_sockaddr_add(base, (struct sockaddr*)&ss, slen, 0);
tt_int_op(evdns_base_count_nameservers(base), ==, 1);
/* Send some queries. */
evdns_base_resolve_ipv4(base, "zz.example.com", DNS_QUERY_NO_SEARCH,
dns_server_gethostbyname_cb, NULL);
evdns_base_resolve_ipv6(base, "zz.example.com", DNS_QUERY_NO_SEARCH,
dns_server_gethostbyname_cb, NULL);
resolve_addr.s_addr = htonl(0xc0a80b0bUL); /* 192.168.11.11 */
evdns_base_resolve_reverse(base, &resolve_addr, 0,
dns_server_gethostbyname_cb, NULL);
memcpy(resolve_addr6.s6_addr,
"\xff\xf0\x00\x00\x00\x00\xaa\xaa"
"\x11\x11\x00\x00\x00\x00\xef\xef", 16);
evdns_base_resolve_reverse_ipv6(base, &resolve_addr6, 0,
dns_server_gethostbyname_cb, (void*)6);
req = evdns_base_resolve_ipv4(base,
"drop.example.com", DNS_QUERY_NO_SEARCH,
dns_server_gethostbyname_cb, (void*)(char*)90909);
evdns_cancel_request(base, req);
event_dispatch();
tt_assert(dns_got_cancel);
test_ok = dns_ok;
end:
if (port)
evdns_close_server_port(port);
if (sock >= 0)
evutil_closesocket(sock);
if (base)
evdns_base_free(base, 0);
}