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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2023 Meta Platforms, Inc. and affiliates.
*/
#include <array>
#include <cerrno>
#include <cstdint>
#include <cstring>
#include <format> // NOLINT: used by the logging macros
#include <git2/types.h>
#include <initializer_list>
#include <iostream> // NOLINT: used by the logging macros
#include <optional>
#include <span>
#include <string>
#include <sys/types.h> // NOLINT: for pid_t
#include <vector>
#pragma once
namespace bf
{
extern const int CGROUP_DROP;
extern const int CGROUP_ACCEPT;
/**
* Dummy network packet, created using Python's @c scapy and the following
* definition:
*
* Ether(src=0x01, dst=0x02)/
* IPv6(src='::1', dst='::2')/
* TCP(sport=31337, dport=31415, flags='S')
*
* This packet defines an Ethernet, IPv6, and TCP header.
*/
extern const std::array<uint8_t, 80> pkt_local_ip6_tcp;
/**
* Number of iterations to run the program for.
*
* Google Benchmark will run each benchmark for a specific duration, so the
* fastest functions will run for more iterations. This is problematic as
* @c BPF_PROG_TEST_RUN requires a number of iterations. To solve this, we use
* @c KeepRunningBatch in order to find out if we can run the benchmark for
* @c progRunRepeat more iterations.
*
* @c progRunRepeat is big enough to have meaningful benchmark results and
* reduce syscall overhead, while being small enough to avoid blocking the
* system too long with longer benchmarks.
*/
extern const int progRunRepeat;
#define abort(fmt, ...) \
throw ::std::runtime_error(::std::format(fmt, ##__VA_ARGS__))
#define err(fmt, ...) \
do { \
::std::cerr << ::std::format("ERROR: " fmt "\n", ##__VA_ARGS__); \
} while (0)
#define info(fmt, ...) \
do { \
::std::cout << ::std::format(fmt "\n", ##__VA_ARGS__); \
} while (0)
/**
* Loop used to run the benchmark.
*
* Use this macro to loop over the state automatically.
*/
#define benchLoop(state) while ((state).KeepRunningBatch(::bf::progRunRepeat))
struct Config
{
public:
::std::string bfcli = "bfcli";
::std::string bpfilter = "bpfilter";
::std::string srcdir = ".";
::std::string outfile = "results.json";
::std::string gitrev = "<unknown>";
::std::optional<::std::string> adhoc;
int adhocRepeat = 1;
const ::std::string adhocBenchName = "bf_adhoc";
int64_t gitdate = 0;
bool runDaemon = true;
Config() noexcept = default;
};
extern Config config;
int disableASLR(char **argv);
int setup(std::span<char *> args);
void restorePermissions(::std::string outfile);
class Sources
{
public:
Sources(::std::string path);
Sources(Sources &other) = delete;
Sources(Sources &&other) = delete;
~Sources();
Sources &operator=(Sources &other) = delete;
Sources &operator=(Sources &&other) = delete;
[[nodiscard]] ::std::string getLastCommitHash() const;
[[nodiscard]] int64_t getLastCommitTime() const;
[[nodiscard]] bool isDirty() const;
private:
::std::string path_;
git_repository *repo_ = nullptr;
};
class Fd
{
public:
Fd(int fd = -1);
Fd(Fd &other) = delete;
Fd(Fd &&other) noexcept(false);
~Fd() noexcept(false);
Fd &operator=(Fd &other) = delete;
Fd &operator=(Fd &&other) noexcept(false);
[[nodiscard]] int get() const;
int close();
private:
int fd_ = -1;
};
class Daemon
{
public:
class Options
{
public:
Options &transient();
Options &noCli();
Options &noIptables();
Options &noNftables();
Options &bufferLen(::std::size_t len);
Options &verbose(const ::std::string &component);
[[nodiscard]] ::std::vector<::std::string> get() const;
private:
::std::vector<::std::string> options_;
};
Daemon(::std::string path = "bpfilter", Options options = Options());
Daemon(Daemon &other) = delete;
Daemon(Daemon &&other) noexcept(false);
~Daemon() noexcept(false);
Daemon &operator=(Daemon &other) = delete;
Daemon &operator=(Daemon &&other) noexcept(false);
private:
::std::string path_;
Options options_;
std::optional<pid_t> pid_;
Fd stdoutFd_;
Fd stderrFd_;
[[nodiscard]] int start();
int stop();
};
class Program
{
public:
Program(std::string name);
Program(Program &other) = delete;
Program(Program &&other) noexcept(false);
~Program() noexcept(false);
Program &operator=(Program &other) = delete;
Program &operator=(Program &&other) noexcept(false);
[[nodiscard]] ::std::size_t nInsn() const;
[[nodiscard]] int run(int expect,
const std::span<const uint8_t> &pkt) const;
int close();
private:
::std::string name_;
int fd_ = -1;
int open();
};
class Chain
{
public:
Chain(::std::string bin = "bfcli", ::std::string name = "bf_bench");
Chain(::std::initializer_list<::std::string> rules);
Chain &operator<<(const ::std::string &rule);
Chain &repeat(const ::std::string &rule, ::std::size_t count);
void insertRuleIPv4Set(unsigned int nIps);
int apply();
[[nodiscard]] Program getProgram() const;
private:
::std::string bin_;
::std::string name_;
::std::vector<::std::string> rules_;
};
} // namespace bf
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