I learning network programming, to achieve a retroreflection server functions, code is as follows:

 
The server-side code 
#include 
#include 
# pragma comment (lib, "WS2_32. Lib") 
# define PORT 8888 
# define ADDR "127.0.0.1 
"
Int main () 
{
Char buf [100]. 
Int iResult=0; 
The SOCKET sconnection=INVALID_SOCKET; 
Struct sockaddr_in serAddr; 
//socket initialization 
WSADATA mydata. 
If (WSAStartup (MAKEWORD (2, 2), & amp; Mydata)!=0) 
{
Printf (" socket initialization failed: % d \ n ", WSAGetLastError ()); 
exit(0); 
} 
Printf (" initialization success... \n"); 
//create a socket 
If ((sconnection=socket (AF_INET SOCK_STREAM, 0))==INVALID_SOCKET) 
{
Printf (" failed to create a socket: % d \ n ", WSAGetLastError ()); 
WSACleanup (); 
return 0; 
} 
Printf (" TCP socket to create success... \n"); 

//set the address of the server structure 
SerAddr. Sin_family=AF_INET; 
SerAddr. Sin_port=htons (PORT); 
SerAddr. Sin_addr. S_un. S_addr=inet_addr (ADDR); 

//to connect to the server 
Printf (" is the connection to % s: % d \ n ", inet_ntoa (serAddr. Sin_addr), htons (serAddr. Sin_port)); 
If (connect (sconnection, (struct sockaddr *) & amp; SerAddr, sizeof (serAddr))==SOCKET_ERROR) 
{
Printf (" connection: % d \ n ", WSAGetLastError ()); 
Closesocket (sconnection); 
WSACleanup (); 
return 0; 
} 
Printf (" connection success... \n"); 
Printf (" ready to send data... \n"); 


//send the data in the buffer 
While (1) 
(
Memset (buf, 0, sizeof (buf));//initialize the buffer 
Printf (" want to send data for: \ n "); 
Gets (buf); 
If (iResult=send (sconnection, buf, sizeof (buf), 0)==SOCKET_ERROR) 
{
Printf (" sending data failure: % d \ n ", WSAGetLastError ()); 
Closesocket (sconnection); 
WSACleanup (); 
return 0; 
} 
Printf (" data sent successfully to % s \ n ", inet_ntoa (serAddr. Sin_addr)); 
Memset (buf, 0, sizeof (buf));//initialize the buffer 

//receive the data returned from the server 
If (iResult=recv (sconnection, buf, strlen (buf), 0)==SOCKET_ERROR) 
{
Printf (" receiving data failure: % d \ n ", WSAGetLastError ()); 
} 
Printf (" the data has been successfully received from % s \ n ", inet_ntoa (serAddr. Sin_addr)); 
The printf (buf); 
); 
Printf (" ready to close the connection... \n"); 
Closesocket (sconnection); 
WSACleanup (); 
return 0; 
} 

 
The client code: 
#include 
#include 
# pragma comment (lib, "WS2_32. Lib") 
# define PORT 8888 
# define ADDR "127.0.0.1 
"
Int main () 
{
Char buf [100]. 
Int iResult=0; 
The SOCKET sconnection=INVALID_SOCKET; 
Struct sockaddr_in serAddr; 
//socket initialization 
WSADATA mydata. 
If (WSAStartup (MAKEWORD (2, 2), & amp; Mydata)!=0) 
{
Printf (" socket initialization failed: % d \ n ", WSAGetLastError ()); 
exit(0); 
} 
Printf (" initialization success... \n"); 
//create a socket 
If ((sconnection=socket (AF_INET SOCK_STREAM, 0))==INVALID_SOCKET) 
{
Printf (" failed to create a socket: % d \ n ", WSAGetLastError ()); 
WSACleanup (); 
return 0; 
} 
Printf (" TCP socket to create success... \n"); 

//set the address of the server structure 
SerAddr. Sin_family=AF_INET; 
SerAddr. Sin_port=htons (PORT); 
SerAddr. Sin_addr. S_un. S_addr=inet_addr (ADDR); 

//to connect to the server 
Printf (" is the connection to % s: % d \ n ", inet_ntoa (serAddr. Sin_addr), htons (serAddr. Sin_port)); 
If (connect (sconnection, (SOCKADDR *) & amp; SerAddr, sizeof (serAddr))==SOCKET_ERROR) 
{
Printf (" connection: % d \ n ", WSAGetLastError ()); 
Closesocket (sconnection); 
WSACleanup (); 
return 0; 
} 
Printf (" connection success... \n"); 
Printf (" ready to send data... \n"); 


//send the data in the buffer 
For (int I=0;; I++) 
{
Memset (buf, 0, sizeof (buf));//initialize the buffer 
Printf (" want to send data for: \ n "); 
Gets (buf); 
If (iResult=send (sconnection, buf, sizeof (buf), 0)==SOCKET_ERROR) 
{
Printf (" sending data failure: % d \ n ", WSAGetLastError ()); 
Closesocket (sconnection); 
WSACleanup (); 
return 0; 
} 
Printf (" data sent successfully to % s \ n ", inet_ntoa (serAddr. Sin_addr)); 
//memset (buf, 0, sizeof (buf));//initialize the buffer 

//receive the data returned from the server 
If (iResult=recv (sconnection, buf, strlen (buf), 0)==SOCKET_ERROR) 
{
Printf (" receiving data failure: % d \ n ", WSAGetLastError ()); 
} 
Printf (" the data has been successfully received from % s \ n ", inet_ntoa (serAddr. Sin_addr)); 
The printf (buf); 
} 
Printf (" ready to close the connection... \n"); 
Closesocket (sconnection); 
WSACleanup (); 
return 0; 
} 

Debugging results:
Once the commissioning client, the server side haven't receive data shows that the error, to find a lot of information on the Internet, a socket problem, but a bit see not too understand, hope, give some Suggestions, what's the eldest brother, otherwise I won't solve this problem well,

CodePudding user response:

10038 WSAENOTSOCK
The server-side code how didn't see listen the accept?

CodePudding user response:

Oh oh, copy didn't completely, change immediately

CodePudding user response:

The server-side code:
#include
#include
# pragma comment (lib, "WS2_32. Lib")
# define PORT 8888
# define ADDR "127.0.0.1
"Int main ()
{
Char buf [100].
Int iResult=0;
The SOCKET listensocket=INVALID_SOCKET;
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