如何在Linux中创建原始套接字而不缓冲接收到的数据包？有可能吗？

int sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (sockfd < 0) {
    perror("socket creation failed");
    exit(EXIT_FAILURE);
}

int optval = 0;
if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &optval, sizeof(optval)) < 0) {
    perror("setsockopt failed");
    exit(EXIT_FAILURE);
}

struct sockaddr_ll sa;
memset(&sa, 0, sizeof(struct sockaddr_ll));
sa.sll_family = AF_PACKET;
sa.sll_protocol = htons(ETH_P_ALL);
sa.sll_ifindex = if_nametoindex("eth0"); // 替换为实际的网络接口名
if (bind(sockfd, (struct sockaddr*)&sa, sizeof(struct sockaddr_ll)) < 0) {
    perror("bind failed");
    exit(EXIT_FAILURE);
}

char buffer[65536];
ssize_t numBytes = recv(sockfd, buffer, sizeof(buffer), 0);
if (numBytes < 0) {
    perror("recv failed");
    exit(EXIT_FAILURE);
}