| /* |
| * |
| * 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 "src/core/lib/iomgr/port.h" |
| #ifdef GRPC_POSIX_SOCKET_RESOLVE_ADDRESS |
| |
| #include "src/core/lib/iomgr/sockaddr.h" |
| |
| #include "src/core/lib/iomgr/resolve_address.h" |
| |
| #include <string.h> |
| #include <sys/types.h> |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| #include <grpc/support/time.h> |
| |
| #include "src/core/lib/gpr/host_port.h" |
| #include "src/core/lib/gpr/string.h" |
| #include "src/core/lib/gpr/useful.h" |
| #include "src/core/lib/gprpp/thd.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/unix_sockets_posix.h" |
| |
| static grpc_error* posix_blocking_resolve_address( |
| const char* name, const char* default_port, |
| grpc_resolved_addresses** addresses) { |
| grpc_core::ExecCtx exec_ctx; |
| struct addrinfo hints; |
| struct addrinfo *result = nullptr, *resp; |
| char* host; |
| char* port; |
| int s; |
| size_t i; |
| grpc_error* err; |
| |
| if (name[0] == 'u' && name[1] == 'n' && name[2] == 'i' && name[3] == 'x' && |
| name[4] == ':' && name[5] != 0) { |
| return grpc_resolve_unix_domain_address(name + 5, addresses); |
| } |
| |
| /* parse name, splitting it into host and port parts */ |
| gpr_split_host_port(name, &host, &port); |
| if (host == nullptr) { |
| err = grpc_error_set_str( |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("unparseable host:port"), |
| GRPC_ERROR_STR_TARGET_ADDRESS, grpc_slice_from_copied_string(name)); |
| goto done; |
| } |
| if (port == nullptr) { |
| if (default_port == nullptr) { |
| err = grpc_error_set_str( |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("no port in name"), |
| GRPC_ERROR_STR_TARGET_ADDRESS, grpc_slice_from_copied_string(name)); |
| 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; |
| |
| if (s != 0) { |
| /* Retry if well-known service name is recognized */ |
| const char* svc[][2] = {{"http", "80"}, {"https", "443"}}; |
| for (i = 0; i < GPR_ARRAY_SIZE(svc); i++) { |
| if (strcmp(port, svc[i][0]) == 0) { |
| GRPC_SCHEDULING_START_BLOCKING_REGION; |
| s = getaddrinfo(host, svc[i][1], &hints, &result); |
| GRPC_SCHEDULING_END_BLOCKING_REGION; |
| break; |
| } |
| } |
| } |
| |
| if (s != 0) { |
| err = grpc_error_set_str( |
| grpc_error_set_str( |
| grpc_error_set_str( |
| grpc_error_set_int( |
| GRPC_ERROR_CREATE_FROM_STATIC_STRING("OS Error"), |
| GRPC_ERROR_INT_ERRNO, s), |
| GRPC_ERROR_STR_OS_ERROR, |
| grpc_slice_from_static_string(gai_strerror(s))), |
| GRPC_ERROR_STR_SYSCALL, |
| grpc_slice_from_static_string("getaddrinfo")), |
| GRPC_ERROR_STR_TARGET_ADDRESS, grpc_slice_from_copied_string(name)); |
| goto done; |
| } |
| |
| /* Success path: set addrs non-NULL, fill it in */ |
| *addresses = static_cast<grpc_resolved_addresses*>( |
| gpr_malloc(sizeof(grpc_resolved_addresses))); |
| (*addresses)->naddrs = 0; |
| for (resp = result; resp != nullptr; resp = resp->ai_next) { |
| (*addresses)->naddrs++; |
| } |
| (*addresses)->addrs = static_cast<grpc_resolved_address*>( |
| gpr_malloc(sizeof(grpc_resolved_address) * (*addresses)->naddrs)); |
| i = 0; |
| for (resp = result; resp != nullptr; resp = resp->ai_next) { |
| memcpy(&(*addresses)->addrs[i].addr, resp->ai_addr, resp->ai_addrlen); |
| (*addresses)->addrs[i].len = resp->ai_addrlen; |
| i++; |
| } |
| err = GRPC_ERROR_NONE; |
| |
| done: |
| gpr_free(host); |
| gpr_free(port); |
| if (result) { |
| freeaddrinfo(result); |
| } |
| return err; |
| } |
| |
| typedef struct { |
| char* name; |
| char* default_port; |
| grpc_closure* on_done; |
| grpc_resolved_addresses** addrs_out; |
| grpc_closure request_closure; |
| void* arg; |
| } request; |
| |
| /* Callback to be passed to grpc_executor to asynch-ify |
| * grpc_blocking_resolve_address */ |
| static void do_request_thread(void* rp, grpc_error* error) { |
| request* r = static_cast<request*>(rp); |
| GRPC_CLOSURE_SCHED(r->on_done, grpc_blocking_resolve_address( |
| r->name, r->default_port, r->addrs_out)); |
| gpr_free(r->name); |
| gpr_free(r->default_port); |
| gpr_free(r); |
| } |
| |
| static void posix_resolve_address(const char* name, const char* default_port, |
| grpc_pollset_set* interested_parties, |
| grpc_closure* on_done, |
| grpc_resolved_addresses** addrs) { |
| request* r = static_cast<request*>(gpr_malloc(sizeof(request))); |
| GRPC_CLOSURE_INIT( |
| &r->request_closure, do_request_thread, r, |
| grpc_executor_scheduler(GRPC_RESOLVER_EXECUTOR, GRPC_EXECUTOR_SHORT)); |
| r->name = gpr_strdup(name); |
| r->default_port = gpr_strdup(default_port); |
| r->on_done = on_done; |
| r->addrs_out = addrs; |
| GRPC_CLOSURE_SCHED(&r->request_closure, GRPC_ERROR_NONE); |
| } |
| |
| grpc_address_resolver_vtable grpc_posix_resolver_vtable = { |
| posix_resolve_address, posix_blocking_resolve_address}; |
| #endif |