| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include "src/core/lib/iomgr/port.h" |
| #ifdef GRPC_POSIX_SOCKET |
| |
| #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/host_port.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| #include <grpc/support/thd.h> |
| #include <grpc/support/time.h> |
| #include <grpc/support/useful.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" |
| #include "src/core/lib/support/block_annotate.h" |
| #include "src/core/lib/support/string.h" |
| |
| 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 *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 == NULL) { |
| err = grpc_error_set_str(GRPC_ERROR_CREATE("unparseable host:port"), |
| GRPC_ERROR_STR_TARGET_ADDRESS, name); |
| goto done; |
| } |
| if (port == NULL) { |
| if (default_port == NULL) { |
| err = grpc_error_set_str(GRPC_ERROR_CREATE("no port in name"), |
| GRPC_ERROR_STR_TARGET_ADDRESS, 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 */ |
| 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("OS Error"), |
| GRPC_ERROR_INT_ERRNO, s), |
| GRPC_ERROR_STR_OS_ERROR, gai_strerror(s)), |
| GRPC_ERROR_STR_SYSCALL, "getaddrinfo"), |
| GRPC_ERROR_STR_TARGET_ADDRESS, name); |
| goto done; |
| } |
| |
| /* Success path: set addrs non-NULL, fill it in */ |
| *addresses = gpr_malloc(sizeof(grpc_resolved_addresses)); |
| (*addresses)->naddrs = 0; |
| for (resp = result; resp != NULL; resp = resp->ai_next) { |
| (*addresses)->naddrs++; |
| } |
| (*addresses)->addrs = |
| 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++; |
| } |
| err = GRPC_ERROR_NONE; |
| |
| done: |
| gpr_free(host); |
| gpr_free(port); |
| if (result) { |
| freeaddrinfo(result); |
| } |
| return err; |
| } |
| |
| grpc_error *(*grpc_blocking_resolve_address)( |
| const char *name, const char *default_port, |
| grpc_resolved_addresses **addresses) = blocking_resolve_address_impl; |
| |
| 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(grpc_exec_ctx *exec_ctx, void *rp, |
| grpc_error *error) { |
| request *r = rp; |
| grpc_exec_ctx_sched( |
| exec_ctx, r->on_done, |
| grpc_blocking_resolve_address(r->name, r->default_port, r->addrs_out), |
| NULL); |
| 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 **addrs) { |
| request *r = gpr_malloc(sizeof(request)); |
| grpc_closure_init(&r->request_closure, do_request_thread, r); |
| r->name = gpr_strdup(name); |
| r->default_port = gpr_strdup(default_port); |
| r->on_done = on_done; |
| r->addrs_out = addrs; |
| grpc_executor_push(&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 **addrs) = resolve_address_impl; |
| |
| #endif |