| /* |
| * |
| * 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 "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** addrs) { |
| struct sockaddr_un* un; |
| if (strlen(name) > |
| GPR_ARRAY_SIZE(((struct sockaddr_un*)nullptr)->sun_path) - 1) { |
| char* err_msg; |
| grpc_error* err; |
| gpr_asprintf(&err_msg, |
| "Path name should not have more than %" PRIuPTR " characters.", |
| GPR_ARRAY_SIZE(un->sun_path) - 1); |
| err = GRPC_ERROR_CREATE_FROM_COPIED_STRING(err_msg); |
| gpr_free(err_msg); |
| return err; |
| } |
| *addrs = static_cast<grpc_resolved_addresses*>( |
| gpr_malloc(sizeof(grpc_resolved_addresses))); |
| (*addrs)->naddrs = 1; |
| (*addrs)->addrs = static_cast<grpc_resolved_address*>( |
| gpr_malloc(sizeof(grpc_resolved_address))); |
| un = reinterpret_cast<struct sockaddr_un*>((*addrs)->addrs->addr); |
| un->sun_family = AF_UNIX; |
| strncpy(un->sun_path, name, sizeof(un->sun_path)); |
| (*addrs)->addrs->len = |
| static_cast<socklen_t>(strlen(un->sun_path) + sizeof(un->sun_family) + 1); |
| return GRPC_ERROR_NONE; |
| } |
| |
| 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)); |
| struct stat st; |
| |
| if (stat(un->sun_path, &st) == 0 && (st.st_mode & S_IFMT) == S_IFSOCK) { |
| unlink(un->sun_path); |
| } |
| } |
| |
| char* 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 nullptr; |
| } |
| |
| char* result; |
| gpr_asprintf(&result, "unix:%s", ((struct sockaddr_un*)addr)->sun_path); |
| return result; |
| } |
| |
| #endif |