| /* |
| * Copyright (C) 2008 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. |
| */ |
| |
| #ifndef ANDROID_INCLUDE_HARDWARE_QEMUD_H |
| #define ANDROID_INCLUDE_HARDWARE_QEMUD_H |
| |
| #include "qemu_pipe.h" |
| |
| static __inline__ QEMU_PIPE_HANDLE |
| qemud_channel_open(const char* name) |
| { |
| return qemu_pipe_open_ns("qemud", name, O_RDWR); |
| } |
| |
| static __inline__ int |
| qemud_channel_send(QEMU_PIPE_HANDLE pipe, const void* msg, int msglen) |
| { |
| char header[5]; |
| |
| if (msglen < 0) |
| msglen = strlen((const char*)msg); |
| |
| if (msglen == 0) |
| return 0; |
| |
| snprintf(header, sizeof(header), "%04x", msglen); |
| if (qemu_pipe_write_fully(pipe, header, 4)) { |
| D("can't write qemud frame header: %s", strerror(errno)); |
| return -1; |
| } |
| |
| if (qemu_pipe_write_fully(pipe, msg, msglen)) { |
| D("can't write qemud frame payload: %s", strerror(errno)); |
| return -1; |
| } |
| return 0; |
| } |
| |
| static __inline__ int |
| qemud_channel_recv(QEMU_PIPE_HANDLE pipe, void* msg, int msgsize) |
| { |
| char header[5]; |
| int size; |
| |
| if (qemu_pipe_read_fully(pipe, header, 4)) { |
| D("can't read qemud frame header: %s", strerror(errno)); |
| return -1; |
| } |
| header[4] = 0; |
| if (sscanf(header, "%04x", &size) != 1) { |
| D("malformed qemud frame header: '%.*s'", 4, header); |
| return -1; |
| } |
| if (size > msgsize) |
| return -1; |
| |
| if (qemu_pipe_read_fully(pipe, msg, size)) { |
| D("can't read qemud frame payload: %s", strerror(errno)); |
| return -1; |
| } |
| return size; |
| } |
| |
| #endif /* ANDROID_INCLUDE_HARDWARE_QEMUD_H */ |