[C] Errori in compilazione client/server con socket

[Navimel]

// CLIENT SERVER.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "stdio.h"
#include <windows.h>
#include <winsock.h>

int main(int argc, char* argv[])
{
int port;
port=23;
char *host;
SOCKET sckListen;
SOCKET sckConnect;
struct sockaddr_in sckAddress;

/*CLIENT
memset(&sckAddress, 0, sizeof(sockaddr_in));
sckConnect = socket(PF_INET, SOCK_STREAM, 0);
sckAddress.sin_port = htons(port);
sckAddress.sin_family = AF_INET;
sckAddress.sin_addr.s_addr = inet_addr("192.168.1.9");



if(connect(sckConnect, (struct sockaddr *)&sckAddress, sizeof(sckAddress)) == SOCKET_ERROR)
{
printf("Errore!!");
}
else
{
printf("***Successfully Connected***\r\n");

}

*/
//SERVER

sckListen = socket(PF_INET, SOCK_STREAM, 0);

sckAddress.sin_port = htons(port);
sckAddress.sin_family= AF_INET;
sckAddress.sin_addr.s_addr = INADDR_ANY;

bind(sckListen, (struct sockaddr *)&sckAddress, sizeof(sckAddress));

if(sckListen != INVALID_SOCKET)
{
printf("***Waiting for client***\r\n");

}
else
printf("Error!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");

return 0;
}

SCUSATE MA DOVE STO SBAGLIANDO??

CIAO GRAZIE

[Johnny_Depp]

TESTATO!!!

// CLIENT

#include <stdio.h>
#include <windows.h>
#include <winsock.h>
#include <process.h>

SOCKET sock=NULL;

SOCKADDR addr;

void MsgProc();

void main()
{
    WSADATA dat;
    WORD ver=MAKEWORD(1,1);

    int res;
    SOCKADDR_IN addr_in;
    addr_in.sin_family=AF_INET;
    addr_in.sin_port=100;
    addr_in.sin_addr.S_un.S_un_b.s_b1=127;
    addr_in.sin_addr.S_un.S_un_b.s_b2=0;
    addr_in.sin_addr.S_un.S_un_b.s_b3=0;
    addr_in.sin_addr.S_un.S_un_b.s_b4=1;

    memcpy(&addr,&addr_in,sizeof(SOCKADDR_IN));


    //auto-start server
    system("start .\\debug\\srvr.exe");

   printf("Remember, 0s are good\n");

    printf("WSAStartup: %d. Version %d\n",(res=WSAStartup(ver,&dat)),ver);

    if(res!=0)
	return;

    sock=socket(PF_INET,SOCK_STREAM,0);

    printf("Connect: %d\n",(res=connect(sock,&addr,sizeof(addr))));

    if(sock==NULL||res!=0)
	return;

    MsgProc();

    WSACleanup();
}


void MsgProc()
{
    char str[100]="";
    int res;

    while(stricmp(str,"exit")!=0){
	printf("String to send: ");
	gets(str);

	send(sock,str,100,0);

        for(int i=0;(res=recv(sock,str,100,0))==SOCKET_ERROR&&i<50;i++)
	    Sleep(100);

        if(res==0||res==WSAECONNRESET||res==WSAECONNABORTED)
        { 
	    printf("Server terminated connection\n");
	    break;
	}


    }

    closesocket(sock);

}

// SERVER

#include <stdio.h>
#include <windows.h>
#include <winsock.h>

SOCKET sock;

SOCKADDR addr;

void MsgProc();

void main()
{
    SOCKADDR_IN addr_in;
    addr_in.sin_family=AF_INET;
    addr_in.sin_port=100;
    addr_in.sin_addr.S_un.S_un_b.s_b1=127;
    addr_in.sin_addr.S_un.S_un_b.s_b2=0;
    addr_in.sin_addr.S_un.S_un_b.s_b3=0;
    addr_in.sin_addr.S_un.S_un_b.s_b4=1;

    memcpy(&addr,&addr_in,sizeof(SOCKADDR_IN));

    SOCKET temp=NULL;

    WSADATA dat;
    WORD ver=MAKEWORD(1,1);
    int res;

    printf("WSAStartup: %d Version %d\n",(res=WSAStartup(ver,&dat)),ver);

    if(res!=0)
	return;

    sock=socket(PF_INET,SOCK_STREAM,0);

    printf("Binding socket: %d\n",bind(sock,&addr,sizeof(addr)));
    printf("Listen mode: %d\n",listen(sock,5));

    while((temp=accept(sock,&addr,NULL))==SOCKET_ERROR);

    sock=temp;

    if(sock)
        MsgProc();

    WSACleanup();
}


void MsgProc()
{
    char buf[100];
    int res=1;
    while((res=recv(sock,buf,100,0))!=SOCKET_ERROR)
    {
	if(res==0||res==WSAECONNRESET||res==WSAECONNABORTED)
	{
	    printf("Client terminated connection\n");
	     break;
	}

	_flushall();//probably not needed

	printf("Recieved string: %s\n",buf);

	send(sock,buf,100,0);
    }

    closesocket(sock);
}

N.B. In entrambi i file (Client.cpp e Server.cpp)
devi linkare la libreria wsock32.lib

Se utilizzi Visual C++ 6.0:

apri Menù -> Project\Setting\Link

nella casella "Object/Library Modules"
aggiungi (alla fine delle librerie linkate) wsock32.lib

...

compila e buon divertimento.

P.S. lanciando il Client, verrà avviato anche il Server...
fai attenzione alla riga di codice evidenziata in rosso
(se il Client non trova il Server) devi modificarla
inserendo il giusto indirizzo PATCH in cui si trova il
file Server srvr.exe

[Navimel]

grazie, alla prossima

[bouncey2k25]

ho provato a compilare il cliente su dev-cpp (windows) e mi i seguenti errori. Come mai??


beta.cpp:6: warning: converting to non-pointer type `SOCKET' from NULL
beta.cpp:13: error: `main' must return `int'

beta.cpp: In function `int main(...)':
beta.cpp:37: error: return-statement with no value, in function returning 'int'
beta.cpp:43: warning: NULL used in arithmetic
beta.cpp:44: error: return-statement with no value, in function returning 'int'

make.exe: *** [beta.o] Error 1