Network client/server (一)，networkclient
摘自 <<Beginning Linux Programming_4th>>
chapter 15 Sockets
1 header files
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#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
header
2 socket
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int main ()
{
int sockfd;
int len;
struct sockaddr_in address;
int result;
char ch = 'A';
sockfd = socket(AF_INET, SOCK_STREAM, 0);
address.sin_family = AF_INET;
address.sin_addr.s_addr = inet_addr("127.0.0.1");
address.sin_port = htons(9734);
len = sizeof(address);
socket
3 connect
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result = connect(sockfd, (struct sockaddr*) &address, len);
if(result == -1)
{
perror("oops: client");
exit(1);
}
connect
4 read/write
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write(sockfd, &ch, 1);
read(sockfd, &ch, 1);
printf("char from server = %c\n", ch);
close(sockfd);
exit(0);
}
write-read-close
