sockfilter.c

// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright (c) 2022 Jacky Yin */
#include <assert.h>
#include <stdio.h>
#include <arpa/inet.h>
#include <errno.h>
#include <netinet/tcp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <unistd.h>
#include <stdbool.h>
#include "sockfilter.skel.h"

#define SO_ATTACH_BPF 50

int main(int argc, char** argv) {
    struct sockfilter_bpf* skel;
    int err, prog_fd, sock;

    /* Load and verify BPF programs*/
    skel = sockfilter_bpf__open_and_load();
    if (!skel) {
        fprintf(stderr, "Failed to open and load BPF skeleton\n");
        return 1;
    }

    printf("[Client] Create TCP socket\n");
    // TODO: add socket api from wasi
    // sock = socket(AF_INET, SOCK_STREAM, 0);
    // if (sock == -1) {
    //     perror("Create socket failed");
    //     return EXIT_FAILURE;
    // }

    // /* Attach BPF program to raw socket */
    // prog_fd = bpf_program__fd(skel->progs.socket_handler);
    // if (setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, sizeof(prog_fd))) {
    // 	err = -3;
    // 	fprintf(stderr, "Failed to attach to raw socket\n");
    // 	goto cleanup;
    // }

    sleep(10);
cleanup:
    sockfilter_bpf__destroy(skel);
    return -err;
}