| /* libcutils/qtaguid.c |
| ** |
| ** Copyright 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. |
| */ |
| |
| #define LOG_TAG "qtaguid" |
| |
| #include <cutils/qtaguid.h> |
| #include <cutils/log.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| extern int qtaguid_tagSocket(int sockfd, int tag, uid_t uid) { |
| char lineBuf[128]; |
| int fd, cnt = 0, res = 0; |
| uint64_t kTag = (uint64_t)tag << 32; |
| snprintf(lineBuf, sizeof(lineBuf), "t %d %llu %d", sockfd, kTag, uid); |
| |
| LOGI("Tagging socket %d with tag %llx(%d) for uid %d", sockfd, kTag, tag, uid); |
| fd = open("/proc/net/xt_qtaguid/ctrl", O_WRONLY); |
| if (fd < 0) { |
| return -errno; |
| } |
| |
| cnt = write(fd, lineBuf, strlen(lineBuf)); |
| if (cnt < 0) { |
| res = -errno; |
| } |
| |
| close(fd); |
| return res; |
| } |
| |
| extern int qtaguid_untagSocket(int sockfd) { |
| char lineBuf[128]; |
| int fd, cnt = 0, res = 0; |
| snprintf(lineBuf, sizeof(lineBuf), "u %d", sockfd); |
| |
| LOGI("Untagging socket %d", sockfd); |
| fd = open("/proc/net/xt_qtaguid/ctrl", O_WRONLY); |
| if (fd < 0) { |
| return -errno; |
| } |
| |
| cnt = write(fd, lineBuf, strlen(lineBuf)); |
| if (cnt < 0) { |
| res = -errno; |
| } |
| |
| close(fd); |
| return res; |
| } |