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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 <stdio.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;
}
grpc_error* grpc_resolve_vsock_address(const char* name,
grpc_resolved_addresses** addrs) {
#ifdef GRPC_HAVE_LINUX_VSOCK
struct sockaddr_vm *vm;
unsigned int cid;
unsigned int port;
if (sscanf(name, "%u:%u", &cid, &port) != 2) {
return GRPC_ERROR_CREATE_FROM_STATIC_STRING("Failed to parse cid:port pair");
}
*addrs = static_cast<grpc_resolved_addresses*>(
gpr_malloc(sizeof(grpc_resolved_addresses)));
(*addrs)->naddrs = 1;
(*addrs)->addrs = static_cast<grpc_resolved_address*>(
gpr_zalloc(sizeof(grpc_resolved_address)));
vm = (struct sockaddr_vm *)(*addrs)->addrs->addr;
vm->svm_family = AF_VSOCK;
vm->svm_cid = cid;
vm->svm_port = port;
(*addrs)->addrs->len = sizeof(struct sockaddr_vm);
return GRPC_ERROR_NONE;
#else /* GRPC_HAVE_LINUX_VSOCK */
return GRPC_ERROR_CREATE_FROM_STATIC_STRING("vsock not supported");
#endif /* GRPC_HAVE_LINUX_VSOCK */
}
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;
}
int grpc_is_vsock(const grpc_resolved_address* resolved_addr) {
#ifdef GRPC_HAVE_LINUX_VSOCK
const grpc_sockaddr* addr =
reinterpret_cast<const grpc_sockaddr*>(resolved_addr->addr);
return addr->sa_family == AF_VSOCK;
#else /* GRPC_HAVE_LINUX_VSOCK */
return 0;
#endif /* GRPC_HAVE_LINUX_VSOCK */
}
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;
}
char* grpc_sockaddr_to_uri_vsock_if_possible(
const grpc_resolved_address* resolved_addr) {
#ifdef GRPC_HAVE_LINUX_VSOCK
const grpc_sockaddr* addr =
reinterpret_cast<const grpc_sockaddr*>(resolved_addr->addr);
if (addr->sa_family != AF_VSOCK) {
return nullptr;
}
char *result;
struct sockaddr_vm *vm = (struct sockaddr_vm*)addr;
gpr_asprintf(&result, "vsock:%u:%u", vm->svm_cid, vm->svm_port);
return result;
#else /* GRPC_HAVE_LINUX_VSOCK */
return nullptr;
#endif /* GRPC_HAVE_LINUX_VSOCK */
}
#endif
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