Artical--1--简单的TCP_IP示例
作者:互联网
Artical–1--简单的TCP_IP示例
代码示例来源于《TCP-IP网络编程》第一章
- server端(服务器端)运行在我自己的阿里云服务器上,
编译运行通过:
gcc hello_server.c -o hserver
./server 50001 //50001为所开放端口号
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
void error_handling(char * message);
int main(int argc,char * argv[])
{
int serv_sock;
int clnt_sock;
struct sockaddr_in serv_addr;
struct sockaddr_in clnt_addr;
socklen_t clnt_addr_size;
char message[]="zzy say hello!";
if(argc != 2)
{
printf("usage : %s <port>\n",argv[0]);
exit(1);
}
serv_sock = socket(PF_INET,SOCK_STREAM,0);
if(serv_sock == -1)
error_handling("socket() error");
memset(&serv_addr,0,sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr=htonl(INADDR_ANY);
serv_addr.sin_port=htons(atoi(argv[1]));
if(bind(serv_sock,(struct sockaddr*)&serv_addr,sizeof(serv_addr))==-1)
error_handling("bind() error");
if(listen(serv_sock,5)==-1)
error_handling("listen() error");
clnt_addr_size=sizeof(clnt_addr);
clnt_sock=accept(serv_sock,(struct sockaddr*)&clnt_addr,&clnt_addr_size);
if(clnt_sock==-1)
error_handling("accept() error");
write(clnt_sock,message,sizeof(message));
close(clnt_sock);
close(serv_sock);
return 0;
}
void error_handling(char *message)
{
fputs(message,stderr);
fputc('\n',stderr);
exit(1);
}
- clien端(客户端)运行在本地ubuntu上:
编译:
gcc hello_client.c -o hclient
./hclient 47.94.129.112 50001
代码:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
void error_handling(char * message);
int main(int argc,char * argv[])
{
int sock;
struct sockaddr_in serv_addr;
char message[30];
int str_len;
if(argc!=3){
printf("usage: %s <IP><PORT>\n",argv[0]);
exit(1);
}
sock = socket(PF_INET,SOCK_STREAM,0);
if(sock == -1)
error_handling("socket() error");
memset(&serv_addr,0,sizeof(serv_addr));
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr=inet_addr(argv[1]);
serv_addr.sin_port=htons(atoi(argv[2]));
if(connect(sock,(struct sockaddr*)&serv_addr,sizeof(serv_addr))==-1)
error_handling("read() error");
str_len = read(sock,message,sizeof(message)-1);
if(str_len==-1)
error_handling("read() error!");
printf("Message from server : %s \n",message);
close(sock);
return 0;
}
void error_handling(char * message)
{
fputs(message,stderr);
fputc('\n',stderr);
exit(1);
}
服务端通过write函数向客户端发送message (zzy say hello!) ,现在将客户端接受message的数组改为3(不能够完全接受服务的的message),看看会出现什么情况:
标签:serv,addr,示例,--,IP,sock,error,message,include 来源: https://blog.csdn.net/MyNuTh/article/details/118444649