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| #define _GNU_SOURCE 1
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <assert.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <poll.h>
#include <fcntl.h>
#define BUFFER_SIZE 64
int main(int argc, char* argv[])
{
if (argc <= 2)
{
printf("usage: %s ip_address port_number\n", basename(argv[0]));
return 1;
}
const char* ip = argv[1];
int port = atoi(argv[2]);
struct sockaddr_in server_address;
bzero(&server_address, sizeof(server_address));
server_address.sin_family = AF_INET;
inet_pton(AF_INET, ip, &server_address.sin_addr);
server_address.sin_port = htons(port);
int sockfd = socket(PF_INET, SOCK_STREAM, 0);
assert(sockfd >= 0);
if (connect(sockfd, (struct sockaddr*)&server_address, sizeof(server_address)) < 0)
{
printf("connection failed\n");
close(sockfd);
return 1;
}
pollfd fds[2];
fds[0].fd = 0;
fds[0].events = POLLIN;
fds[0].revents = 0;
fds[1].fd = sockfd;
fds[1].events = POLLIN | POLLRDHUP;
fds[1].revents = 0;
char read_buf[BUFFER_SIZE];
int pipefd[2];
int ret = pipe(pipefd);
assert(ret != -1);
while (1)
{
ret = poll(fds, 2, -1);
if (ret < 0)
{
printf("poll failure\n");
break;
}
if (fds[1].revents & POLLRDHUP)
{
printf("server close the connection\n");
break;
}
else if (fds[1].revents & POLLIN)
{
memset(read_buf, '\0', BUFFER_SIZE);
recv(fds[1].fd, read_buf, BUFFER_SIZE - 1, 0);
printf("%s\n", read_buf);
}
if (fds[0].revents & POLLIN)
{
ret = splice(0, NULL, pipefd[1], NULL, 32768, SPLICE_F_MORE | SPLICE_F_MOVE);
ret = splice(pipefd[0], NULL, sockfd, NULL, 32768, SPLICE_F_MORE | SPLICE_F_MOVE);
}
}
close(sockfd);
return 0;
}
|