linux下使用usbcan

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <linux/can.h>
#include <linux/can/raw.h>
#include <sys/socket.h>
#include <net/if.h>
#include <unistd.h>

int main() {
    int s;
    struct sockaddr_can addr;
    struct ifreq ifr;
    struct can_frame frame;

    // 创建 socket
    if ((s = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0) {
        perror("Socket");
        return 1;
    }

    // 设置接口名
    strcpy(ifr.ifr_name, "can0");

    // 获取接口索引
    ioctl(s, SIOCGIFINDEX, &ifr);

    // 绑定 socket 到指定接口
    addr.can_family = AF_CAN;
    addr.can_ifindex = ifr.ifr_ifindex;
    if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
        perror("Bind");
        return 1;
    }

    // 发送数据
    frame.can_id = 0x123;
    frame.can_dlc = 8;
    memset(frame.data, 0xAA, 8);
    write(s, &frame, sizeof(struct can_frame));

    // 接收数据
    read(s, &frame, sizeof(struct can_frame));
    printf("Received CAN frame with ID: %X\n", frame.can_id);

    close(s);
    return 0;
}