linux splice使用示例 （使用socket服务于单用户的回射服务器）

#define _GNU_SOURCE

#include <sys/types.h>

#include <sys/socket.h>

#include <unistd.h>

#include <stdio.h>

#include <netinet/in.h>

#include<arpa/inet.h>

#include <fcntl.h>

#include <sys/stat.h>

void check(int res, const char *fucname)

{

if(res < 0)

    {

perror(fucname);

}

}

int main()

{

int res;

int listenfd = socket(AF_INET, SOCK_STREAM, 0);

struct sockaddr_in local;

local.sin_family = AF_INET;

local.sin_addr.s_addr = htonl(INADDR_ANY);

local.sin_port = htons(5000);

res = bind(listenfd, (struct sockaddr *)&local, sizeof(local));

check(res, "bind");

res = listen(listenfd, 3);

check(res, "listen");

int connfd = accept(listenfd, NULL, NULL);

int pipefd[2] = {0x00};

pipe(pipefd);

while(1)

    {

splice(connfd, NULL, pipefd[1], NULL, 4096, SPLICE_F_MOVE | SPLICE_F_MORE);

splice(pipefd[0], NULL, connfd, NULL, 4096, SPLICE_F_MOVE | SPLICE_F_MORE);

}

close(listenfd);

return 0;

}