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/*
*
* Copyright 2015 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 "src/core/lib/iomgr/port.h"
#ifdef GRPC_WINSOCK_SOCKET
#include "src/core/lib/iomgr/sockaddr.h"
#include "src/core/lib/iomgr/resolve_address.h"
#include <inttypes.h>
#include <string.h>
#include <sys/types.h>
#include <grpc/support/alloc.h>
#include <grpc/support/host_port.h>
#include <grpc/support/log.h>
#include <grpc/support/log_windows.h>
#include <grpc/support/string_util.h>
#include <grpc/support/thd.h>
#include <grpc/support/time.h>
#include "src/core/lib/iomgr/block_annotate.h"
#include "src/core/lib/iomgr/executor.h"
#include "src/core/lib/iomgr/iomgr_internal.h"
#include "src/core/lib/iomgr/sockaddr_utils.h"
#include "src/core/lib/support/string.h"
typedef struct {
char *name;
char *default_port;
grpc_closure request_closure;
grpc_closure *on_done;
grpc_resolved_addresses **addresses;
} request;
static grpc_error *blocking_resolve_address_impl(
const char *name, const char *default_port,
grpc_resolved_addresses **addresses) {
struct addrinfo hints;
struct addrinfo *result = NULL, *resp;
char *host;
char *port;
int s;
size_t i;
grpc_error *error = GRPC_ERROR_NONE;
/* parse name, splitting it into host and port parts */
gpr_split_host_port(name, &host, &port);
if (host == NULL) {
char *msg;
gpr_asprintf(&msg, "unparseable host:port: '%s'", name);
error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
gpr_free(msg);
goto done;
}
if (port == NULL) {
if (default_port == NULL) {
char *msg;
gpr_asprintf(&msg, "no port in name '%s'", name);
error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
gpr_free(msg);
goto done;
}
port = gpr_strdup(default_port);
}
/* Call getaddrinfo */
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC; /* ipv4 or ipv6 */
hints.ai_socktype = SOCK_STREAM; /* stream socket */
hints.ai_flags = AI_PASSIVE; /* for wildcard IP address */
GRPC_SCHEDULING_START_BLOCKING_REGION;
s = getaddrinfo(host, port, &hints, &result);
GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX;
if (s != 0) {
error = GRPC_WSA_ERROR(WSAGetLastError(), "getaddrinfo");
goto done;
}
/* Success path: set addrs non-NULL, fill it in */
(*addresses) =
(grpc_resolved_addresses *)gpr_malloc(sizeof(grpc_resolved_addresses));
(*addresses)->naddrs = 0;
for (resp = result; resp != NULL; resp = resp->ai_next) {
(*addresses)->naddrs++;
}
(*addresses)->addrs = (grpc_resolved_address *)gpr_malloc(
sizeof(grpc_resolved_address) * (*addresses)->naddrs);
i = 0;
for (resp = result; resp != NULL; resp = resp->ai_next) {
memcpy(&(*addresses)->addrs[i].addr, resp->ai_addr, resp->ai_addrlen);
(*addresses)->addrs[i].len = resp->ai_addrlen;
i++;
}
{
for (i = 0; i < (*addresses)->naddrs; i++) {
char *buf;
grpc_sockaddr_to_string(&buf, &(*addresses)->addrs[i], 0);
gpr_free(buf);
}
}
done:
gpr_free(host);
gpr_free(port);
if (result) {
freeaddrinfo(result);
}
return error;
}
grpc_error *(*grpc_blocking_resolve_address)(
const char *name, const char *default_port,
grpc_resolved_addresses **addresses) = blocking_resolve_address_impl;
/* Callback to be passed to grpc_executor to asynch-ify
* grpc_blocking_resolve_address */
static void do_request_thread(grpc_exec_ctx *exec_ctx, void *rp,
grpc_error *error) {
request *r = (request *)rp;
if (error == GRPC_ERROR_NONE) {
error =
grpc_blocking_resolve_address(r->name, r->default_port, r->addresses);
} else {
GRPC_ERROR_REF(error);
}
GRPC_CLOSURE_SCHED(exec_ctx, r->on_done, error);
gpr_free(r->name);
gpr_free(r->default_port);
gpr_free(r);
}
void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addrs) {
if (addrs != NULL) {
gpr_free(addrs->addrs);
}
gpr_free(addrs);
}
static void resolve_address_impl(grpc_exec_ctx *exec_ctx, const char *name,
const char *default_port,
grpc_pollset_set *interested_parties,
grpc_closure *on_done,
grpc_resolved_addresses **addresses) {
request *r = (request *)gpr_malloc(sizeof(request));
GRPC_CLOSURE_INIT(&r->request_closure, do_request_thread, r,
grpc_executor_scheduler(GRPC_EXECUTOR_SHORT));
r->name = gpr_strdup(name);
r->default_port = gpr_strdup(default_port);
r->on_done = on_done;
r->addresses = addresses;
GRPC_CLOSURE_SCHED(exec_ctx, &r->request_closure, GRPC_ERROR_NONE);
}
void (*grpc_resolve_address)(
grpc_exec_ctx *exec_ctx, const char *name, const char *default_port,
grpc_pollset_set *interested_parties, grpc_closure *on_done,
grpc_resolved_addresses **addresses) = resolve_address_impl;
#endif
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