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/*
* Copyright (C) 2017 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 LOG_TAG
#define LOG_TAG "bpfloader"
#endif
#include <arpa/inet.h>
#include <dirent.h>
#include <elf.h>
#include <error.h>
#include <fcntl.h>
#include <inttypes.h>
#include <linux/bpf.h>
#include <linux/unistd.h>
#include <net/if.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
#include <libbpf_android.h>
#include <log/log.h>
#include <netdutils/Misc.h>
#include <netdutils/Slice.h>
#include "bpf/BpfUtils.h"
#include "netdbpf/bpf_shared.h"
using android::base::EndsWith;
using android::base::unique_fd;
using std::string;
#define BPF_PROG_PATH "/system/etc/bpf/"
#define CLEANANDEXIT(ret, mapPatterns) \
do { \
for (size_t i = 0; i < mapPatterns.size(); i++) { \
if (mapPatterns[i].fd > -1) { \
close(mapPatterns[i].fd); \
} \
} \
return ret; \
} while (0)
using android::bpf::BpfMapInfo;
using android::bpf::BpfProgInfo;
void loadAllElfObjects(void) {
DIR* dir;
struct dirent* ent;
if ((dir = opendir(BPF_PROG_PATH)) != NULL) {
while ((ent = readdir(dir)) != NULL) {
string s = ent->d_name;
if (!EndsWith(s, ".o")) continue;
string progPath = BPF_PROG_PATH + s;
int ret = android::bpf::loadProg(progPath.c_str());
ALOGI("Attempted load object: %s, ret: %s", progPath.c_str(), std::strerror(-ret));
}
closedir(dir);
}
}
int main() {
std::string value = android::base::GetProperty("bpf.progs_loaded", "");
if (value == "1") {
ALOGI("Property bpf.progs_loaded is set, progs already loaded.\n");
return 0;
}
// Load all ELF objects, create programs and maps, and pin them
loadAllElfObjects();
if (android::base::SetProperty("bpf.progs_loaded", "1") == false) {
ALOGE("Failed to set bpf.progs_loaded property\n");
return 1;
}
return 0;
}
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