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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"
#ifdef GRPC_HAVE_UNIX_SOCKET
#include "src/core/lib/iomgr/sockaddr.h"
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/un.h>
#include "absl/strings/str_cat.h"
#include "src/core/lib/iomgr/parse_address.h"
#include "src/core/lib/iomgr/unix_sockets_posix.h"
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include "src/core/lib/gpr/useful.h"
void grpc_create_socketpair_if_unix(int sv[2]) {
GPR_ASSERT(socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == 0);
}
grpc_error* grpc_resolve_unix_domain_address(
const char* name, grpc_resolved_addresses** addresses) {
*addresses = static_cast<grpc_resolved_addresses*>(
gpr_malloc(sizeof(grpc_resolved_addresses)));
(*addresses)->naddrs = 1;
(*addresses)->addrs = static_cast<grpc_resolved_address*>(
gpr_malloc(sizeof(grpc_resolved_address)));
return grpc_core::UnixSockaddrPopulate(name, (*addresses)->addrs);
}
grpc_error* grpc_resolve_unix_abstract_domain_address(
const absl::string_view name, grpc_resolved_addresses** addresses) {
*addresses = static_cast<grpc_resolved_addresses*>(
gpr_malloc(sizeof(grpc_resolved_addresses)));
(*addresses)->naddrs = 1;
(*addresses)->addrs = static_cast<grpc_resolved_address*>(
gpr_malloc(sizeof(grpc_resolved_address)));
return grpc_core::UnixAbstractSockaddrPopulate(name, (*addresses)->addrs);
}
int grpc_is_unix_socket(const grpc_resolved_address* resolved_addr) {
const grpc_sockaddr* addr =
reinterpret_cast<const grpc_sockaddr*>(resolved_addr->addr);
return addr->sa_family == AF_UNIX;
}
void grpc_unlink_if_unix_domain_socket(
const grpc_resolved_address* resolved_addr) {
const grpc_sockaddr* addr =
reinterpret_cast<const grpc_sockaddr*>(resolved_addr->addr);
if (addr->sa_family != AF_UNIX) {
return;
}
struct sockaddr_un* un = reinterpret_cast<struct sockaddr_un*>(
const_cast<char*>(resolved_addr->addr));
// There is nothing to unlink for an abstract unix socket
if (un->sun_path[0] == '\0' && un->sun_path[1] != '\0') {
return;
}
struct stat st;
if (stat(un->sun_path, &st) == 0 && (st.st_mode & S_IFMT) == S_IFSOCK) {
unlink(un->sun_path);
}
}
std::string grpc_sockaddr_to_uri_unix_if_possible(
const grpc_resolved_address* resolved_addr) {
const grpc_sockaddr* addr =
reinterpret_cast<const grpc_sockaddr*>(resolved_addr->addr);
if (addr->sa_family != AF_UNIX) {
return "";
}
const auto* unix_addr = reinterpret_cast<const struct sockaddr_un*>(addr);
if (unix_addr->sun_path[0] == '\0' && unix_addr->sun_path[1] != '\0') {
return absl::StrCat(
"unix-abstract:",
absl::string_view(
unix_addr->sun_path + 1,
resolved_addr->len - sizeof(unix_addr->sun_family) - 1));
}
return absl::StrCat("unix:", unix_addr->sun_path);
}
#endif
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