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| #include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <errno.h>
#include <netinet/in.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#define PORT 10010
#define BUFF 256
int main(int argc, char const *argv[])
{
int server_fd = socket(AF_INET, SOCK_STREAM, 0);
if(server_fd == -1)
{
printf("create server socket error[%s]...\n", strerror(errno));
return -1;
}
struct sockaddr_in server_addr;
bzero(&server_addr, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
server_addr.sin_port = htons(PORT);
if(bind(server_fd, (struct sockaddr*)&server_addr, sizeof(sockaddr)) == -1)
{
printf("bind on local address error[%s]\n", strerror(errno));
close(server_fd);
return -1;
}
if(listen(server_fd, 1) == -1)
{
printf("listen on local address error[%s]\n", strerror(errno));
close(server_fd);
return -1;
}
puts("listening on local address...");
struct sockaddr_in client_addr;
socklen_t client_addr_len = sizeof(client_addr), client_fd;
if((client_fd = accept(server_fd, (struct sockaddr*)&client_addr, &client_addr_len)) == -1)
{
printf("accept connection error[%s]\n", strerror(errno));
close(server_fd);
return -1;
}
puts("accept one connection...");
int flags = fcntl(client_fd, F_GETFL, 0);
if(fcntl(client_fd, F_SETFL, flags | O_NONBLOCK) < 0)
{
puts("set socket fd to nonblock failed...");
close(server_fd);
return -1;
}
puts("set client_fd to nonblock...");
int recv_len = 0;
char recv_buf[BUFF];
bzero(recv_buf, BUFF);
do
{
do
{
sleep(1);
recv_len = recv(client_fd, recv_buf, BUFF, 0);
printf("recv len = %d\n", recv_len);
if(errno == EINTR)
puts("EINTR");
if(errno == EAGAIN)
puts("EAGAIN");
}while(recv_len < 0 && (errno == EINTR || errno == EAGAIN));
printf("%s\n", recv_buf);
bzero(recv_buf, BUFF);
}while(recv_len != 0);
puts("server done...");
close(client_fd);
close(server_fd);
return 0;
}
|
