73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <qemud.h>
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#include <qemu_pipe_bp.h>
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#include <unistd.h>
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int qemud_channel_open(const char* name) {
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return qemu_pipe_open_ns("qemud", name, O_RDWR);
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}
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int qemud_channel_send(int pipe, const void* msg, int size) {
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char header[5];
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if (size < 0)
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size = strlen((const char*)msg);
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if (size == 0)
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return 0;
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snprintf(header, sizeof(header), "%04x", size);
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if (qemu_pipe_write_fully(pipe, header, 4)) {
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return -1;
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}
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if (qemu_pipe_write_fully(pipe, msg, size)) {
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return -1;
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}
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return 0;
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}
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int qemud_channel_recv(int pipe, void* msg, int maxsize) {
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char header[5];
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int size;
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if (qemu_pipe_read_fully(pipe, header, 4)) {
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return -1;
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}
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header[4] = 0;
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if (sscanf(header, "%04x", &size) != 1) {
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return -1;
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}
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if (size > maxsize) {
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return -1;
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}
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if (qemu_pipe_read_fully(pipe, msg, size)) {
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return -1;
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}
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return size;
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}
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