TCP通信例子C语言实现
服务器代码:客户端代码:
服务器代码:
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#define SERVER_PORT 5555
int main()
{
int serverSocket
;
struct sockaddr_in server_addr
;
struct sockaddr_in clientAddr
;
int addr_len
= sizeof(clientAddr
);
int client
;
char buffer
[200];
int iDataNum
;
if((serverSocket
= socket(AF_INET
, SOCK_STREAM
, 0)) < 0)
{
perror("socket");
return 1;
}
bzero(&server_addr
, sizeof(server_addr
));
server_addr
.sin_family
= AF_INET
;
server_addr
.sin_port
= htons(SERVER_PORT
);
server_addr
.sin_addr
.s_addr
= htonl(INADDR_ANY
);
if(bind(serverSocket
, (struct sockaddr
*)&server_addr
, sizeof(server_addr
)) < 0)
{
perror("connect");
return 1;
}
if(listen(serverSocket
, 5) < 0)
{
perror("listen");
return 1;
}
while(1)
{
printf("Listening on port: %d\n", SERVER_PORT
);
client
= accept(serverSocket
, (struct sockaddr
*)&clientAddr
, (socklen_t
*)&addr_len
);
if(client
< 0)
{
perror("accept");
continue;
}
printf("\nrecv client data...n");
printf("IP is %s\n", inet_ntoa(clientAddr
.sin_addr
));
printf("Port is %d\n", htons(clientAddr
.sin_port
));
while(1)
{
iDataNum
= recv(client
, buffer
, 1024, 0);
if(iDataNum
< 0)
{
perror("recv");
continue;
}
buffer
[iDataNum
] = '\0';
if(strcmp(buffer
, "quit") == 0)
break;
printf("%drecv data is %s\n", iDataNum
, buffer
);
send(client
, buffer
, iDataNum
, 0);
}
}
return 0;
}
客户端代码:
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#define SERVER_PORT 5555
int main()
{
int clientSocket
;
struct sockaddr_in serverAddr
;
char sendbuf
[200];
char recvbuf
[200];
int iDataNum
;
if((clientSocket
= socket(AF_INET
, SOCK_STREAM
, 0)) < 0)
{
perror("socket");
return 1;
}
serverAddr
.sin_family
= AF_INET
;
serverAddr
.sin_port
= htons(SERVER_PORT
);
serverAddr
.sin_addr
.s_addr
= inet_addr("127.0.0.1");
if(connect(clientSocket
, (struct sockaddr
*)&serverAddr
, sizeof(serverAddr
)) < 0)
{
perror("connect");
return 1;
}
printf("connect with destination host...\n");
while(1)
{
printf("Input your world:>");
scanf("%s", sendbuf
);
printf("\n");
send(clientSocket
, sendbuf
, strlen(sendbuf
), 0);
if(strcmp(sendbuf
, "quit") == 0)
break;
iDataNum
= recv(clientSocket
, recvbuf
, 200, 0);
recvbuf
[iDataNum
] = '\0';
printf("recv data of my world is: %s\n", recvbuf
);
}
close(clientSocket
);
return 0;
}
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