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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/support/port_platform.h>
#include "src/core/lib/iomgr/port.h"
#if GRPC_ARES == 1 && defined(GPR_WINDOWS)
#include <grpc/support/string_util.h>
#include "src/core/ext/filters/client_channel/lb_policy_factory.h"
#include "src/core/ext/filters/client_channel/parse_address.h"
#include "src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h"
#include "src/core/lib/gpr/host_port.h"
#include "src/core/lib/gpr/string.h"
#include "src/core/lib/iomgr/socket_windows.h"
bool grpc_ares_query_ipv6() { return grpc_ipv6_loopback_available(); }
static bool inner_maybe_resolve_localhost_manually_locked(
const char* name, const char* default_port, grpc_lb_addresses** addrs,
char** host, char** port) {
gpr_split_host_port(name, host, port);
if (*host == nullptr) {
gpr_log(GPR_ERROR,
"Failed to parse %s into host:port during Windows localhost "
"resolution check.",
name);
return false;
}
if (*port == nullptr) {
if (default_port == nullptr) {
gpr_log(GPR_ERROR,
"No port or default port for %s during Windows localhost "
"resolution check.",
name);
return false;
}
*port = gpr_strdup(default_port);
}
if (gpr_stricmp(*host, "localhost") == 0) {
GPR_ASSERT(*addrs == nullptr);
*addrs = grpc_lb_addresses_create(2, nullptr);
uint16_t numeric_port = grpc_strhtons(*port);
// Append the ipv6 loopback address.
struct sockaddr_in6 ipv6_loopback_addr;
memset(&ipv6_loopback_addr, 0, sizeof(ipv6_loopback_addr));
((char*)&ipv6_loopback_addr.sin6_addr)[15] = 1;
ipv6_loopback_addr.sin6_family = AF_INET6;
ipv6_loopback_addr.sin6_port = numeric_port;
grpc_lb_addresses_set_address(
*addrs, 0, &ipv6_loopback_addr, sizeof(ipv6_loopback_addr),
false /* is_balancer */, nullptr /* balancer_name */,
nullptr /* user_data */);
// Append the ipv4 loopback address.
struct sockaddr_in ipv4_loopback_addr;
memset(&ipv4_loopback_addr, 0, sizeof(ipv4_loopback_addr));
((char*)&ipv4_loopback_addr.sin_addr)[0] = 0x7f;
((char*)&ipv4_loopback_addr.sin_addr)[3] = 0x01;
ipv4_loopback_addr.sin_family = AF_INET;
ipv4_loopback_addr.sin_port = numeric_port;
grpc_lb_addresses_set_address(
*addrs, 1, &ipv4_loopback_addr, sizeof(ipv4_loopback_addr),
false /* is_balancer */, nullptr /* balancer_name */,
nullptr /* user_data */);
// Let the address sorter figure out which one should be tried first.
grpc_cares_wrapper_address_sorting_sort(*addrs);
return true;
}
return false;
}
bool grpc_ares_maybe_resolve_localhost_manually_locked(
const char* name, const char* default_port, grpc_lb_addresses** addrs) {
char* host = nullptr;
char* port = nullptr;
bool out = inner_maybe_resolve_localhost_manually_locked(name, default_port,
addrs, &host, &port);
gpr_free(host);
gpr_free(port);
return out;
}
#endif /* GRPC_ARES == 1 && defined(GPR_WINDOWS) */
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