/* * Copyright (C) 2011 The Android Open Source Project * * 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 <cutils/sockets.h> #include <sys/uio.h> #include <log/log.h> #if defined(__ANDROID__) /* For the socket trust (credentials) check */ #include <private/android_filesystem_config.h> #define __android_unused #else #define __android_unused __attribute__((__unused__)) #endif bool socket_peer_is_trusted(int fd __android_unused) { #if defined(__ANDROID__) ucred cr; socklen_t len = sizeof(cr); int n = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cr, &len); if (n != 0) { ALOGE("could not get socket credentials: %s\n", strerror(errno)); return false; } if ((cr.uid != AID_ROOT) && (cr.uid != AID_SHELL)) { ALOGE("untrusted userid on other end of socket: userid %d\n", cr.uid); return false; } #endif return true; } int socket_close(int sock) { return close(sock); } int socket_set_receive_timeout(cutils_socket_t sock, int timeout_ms) { timeval tv; tv.tv_sec = timeout_ms / 1000; tv.tv_usec = (timeout_ms % 1000) * 1000; return setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); } ssize_t socket_send_buffers(cutils_socket_t sock, const cutils_socket_buffer_t* buffers, size_t num_buffers) { if (num_buffers > SOCKET_SEND_BUFFERS_MAX_BUFFERS) { return -1; } iovec iovec_buffers[SOCKET_SEND_BUFFERS_MAX_BUFFERS]; for (size_t i = 0; i < num_buffers; ++i) { // It's safe to cast away const here; iovec declares non-const // void* because it's used for both send and receive, but since // we're only sending, the data won't be modified. iovec_buffers[i].iov_base = const_cast<void*>(buffers[i].data); iovec_buffers[i].iov_len = buffers[i].length; } return writev(sock, iovec_buffers, num_buffers); }