/* * * 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 #ifdef GPR_POSIX_SOCKET #include "src/core/lib/iomgr/resolve_address.h" #include "src/core/lib/iomgr/sockaddr.h" #include #include #include #include #include #include #include #include #include #include "src/core/lib/iomgr/executor.h" #include "src/core/lib/iomgr/iomgr_internal.h" #include "src/core/lib/iomgr/sockaddr_utils.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_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_closure *on_done, grpc_resolved_addresses **addrs) = resolve_address_impl; #endif