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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 <grpc/support/port_platform.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/channel/channel_args.h"
#include "src/core/ext/filters/client_channel/lb_policy_factory.h"
#include "src/core/ext/filters/client_channel/parse_address.h"
grpc_lb_addresses* grpc_lb_addresses_create(
size_t num_addresses, const grpc_lb_user_data_vtable* user_data_vtable) {
grpc_lb_addresses* addresses =
static_cast<grpc_lb_addresses*>(gpr_zalloc(sizeof(grpc_lb_addresses)));
addresses->num_addresses = num_addresses;
addresses->user_data_vtable = user_data_vtable;
const size_t addresses_size = sizeof(grpc_lb_address) * num_addresses;
addresses->addresses =
static_cast<grpc_lb_address*>(gpr_zalloc(addresses_size));
return addresses;
}
grpc_lb_addresses* grpc_lb_addresses_copy(const grpc_lb_addresses* addresses) {
grpc_lb_addresses* new_addresses = grpc_lb_addresses_create(
addresses->num_addresses, addresses->user_data_vtable);
memcpy(new_addresses->addresses, addresses->addresses,
sizeof(grpc_lb_address) * addresses->num_addresses);
for (size_t i = 0; i < addresses->num_addresses; ++i) {
if (new_addresses->addresses[i].balancer_name != nullptr) {
new_addresses->addresses[i].balancer_name =
gpr_strdup(new_addresses->addresses[i].balancer_name);
}
if (new_addresses->addresses[i].user_data != nullptr) {
new_addresses->addresses[i].user_data = addresses->user_data_vtable->copy(
new_addresses->addresses[i].user_data);
}
}
return new_addresses;
}
void grpc_lb_addresses_set_address(grpc_lb_addresses* addresses, size_t index,
const void* address, size_t address_len,
bool is_balancer, const char* balancer_name,
void* user_data) {
GPR_ASSERT(index < addresses->num_addresses);
if (user_data != nullptr) GPR_ASSERT(addresses->user_data_vtable != nullptr);
grpc_lb_address* target = &addresses->addresses[index];
memcpy(target->address.addr, address, address_len);
target->address.len = static_cast<socklen_t>(address_len);
target->is_balancer = is_balancer;
target->balancer_name = gpr_strdup(balancer_name);
target->user_data = user_data;
}
bool grpc_lb_addresses_set_address_from_uri(grpc_lb_addresses* addresses,
size_t index, const grpc_uri* uri,
bool is_balancer,
const char* balancer_name,
void* user_data) {
grpc_resolved_address address;
if (!grpc_parse_uri(uri, &address)) return false;
grpc_lb_addresses_set_address(addresses, index, address.addr, address.len,
is_balancer, balancer_name, user_data);
return true;
}
int grpc_lb_addresses_cmp(const grpc_lb_addresses* addresses1,
const grpc_lb_addresses* addresses2) {
if (addresses1->num_addresses > addresses2->num_addresses) return 1;
if (addresses1->num_addresses < addresses2->num_addresses) return -1;
if (addresses1->user_data_vtable > addresses2->user_data_vtable) return 1;
if (addresses1->user_data_vtable < addresses2->user_data_vtable) return -1;
for (size_t i = 0; i < addresses1->num_addresses; ++i) {
const grpc_lb_address* target1 = &addresses1->addresses[i];
const grpc_lb_address* target2 = &addresses2->addresses[i];
if (target1->address.len > target2->address.len) return 1;
if (target1->address.len < target2->address.len) return -1;
int retval = memcmp(target1->address.addr, target2->address.addr,
target1->address.len);
if (retval != 0) return retval;
if (target1->is_balancer > target2->is_balancer) return 1;
if (target1->is_balancer < target2->is_balancer) return -1;
const char* balancer_name1 =
target1->balancer_name != nullptr ? target1->balancer_name : "";
const char* balancer_name2 =
target2->balancer_name != nullptr ? target2->balancer_name : "";
retval = strcmp(balancer_name1, balancer_name2);
if (retval != 0) return retval;
if (addresses1->user_data_vtable != nullptr) {
retval = addresses1->user_data_vtable->cmp(target1->user_data,
target2->user_data);
if (retval != 0) return retval;
}
}
return 0;
}
void grpc_lb_addresses_destroy(grpc_lb_addresses* addresses) {
for (size_t i = 0; i < addresses->num_addresses; ++i) {
gpr_free(addresses->addresses[i].balancer_name);
if (addresses->addresses[i].user_data != nullptr) {
addresses->user_data_vtable->destroy(addresses->addresses[i].user_data);
}
}
gpr_free(addresses->addresses);
gpr_free(addresses);
}
static void* lb_addresses_copy(void* addresses) {
return grpc_lb_addresses_copy(static_cast<grpc_lb_addresses*>(addresses));
}
static void lb_addresses_destroy(void* addresses) {
grpc_lb_addresses_destroy(static_cast<grpc_lb_addresses*>(addresses));
}
static int lb_addresses_cmp(void* addresses1, void* addresses2) {
return grpc_lb_addresses_cmp(static_cast<grpc_lb_addresses*>(addresses1),
static_cast<grpc_lb_addresses*>(addresses2));
}
static const grpc_arg_pointer_vtable lb_addresses_arg_vtable = {
lb_addresses_copy, lb_addresses_destroy, lb_addresses_cmp};
grpc_arg grpc_lb_addresses_create_channel_arg(
const grpc_lb_addresses* addresses) {
return grpc_channel_arg_pointer_create(
(char*)GRPC_ARG_LB_ADDRESSES, (void*)addresses, &lb_addresses_arg_vtable);
}
grpc_lb_addresses* grpc_lb_addresses_find_channel_arg(
const grpc_channel_args* channel_args) {
const grpc_arg* lb_addresses_arg =
grpc_channel_args_find(channel_args, GRPC_ARG_LB_ADDRESSES);
if (lb_addresses_arg == nullptr || lb_addresses_arg->type != GRPC_ARG_POINTER)
return nullptr;
return static_cast<grpc_lb_addresses*>(lb_addresses_arg->value.pointer.p);
}
bool grpc_lb_addresses_contains_balancer_address(
const grpc_lb_addresses& addresses) {
for (size_t i = 0; i < addresses.num_addresses; ++i) {
if (addresses.addresses[i].is_balancer) return true;
}
return false;
}
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