Kodewerx

/***************************************************************************
 *   Copyright (C) 2007 by Cloud   *
 *   cloud@laptop   *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

#define MAX_BUFFER_SIZE 1024
#define MAX_CONNECTIONS 20

/**
* Function declarations
*/
void error (char *);
void makeServerSocket (char[] *, struct sockaddr_in &, struct sockaddr_in &, int &, int &, char &);
void makeClientSocket (char[] *, struct sockaddr_in &, struct sockaddr_in &, int &, int &, char &);

/**
 *
 */
int main(int argc, char *argv[])
{
    int socketType=0;
    int serverSocketFD=0;
    int clientSocketFD=0;
    int bytesRead=0;
    struct sockaddr_in client;
    struct sockaddr_in server;
    char buffer[MAX_BUFFER_SIZE];
   
    printf("Socket v0.01\n\n");
    /*if (sizeof(argv<1)) {
        printf("Usage: IP Address (xxx.xxx.xxx.xxx) Port Number (xxxxx)");
        exit(1);
    }*/
    printf("Select socket type (0=client, 1=Server)\n");
    scanf("%d", &socketType);
    if (socketType) {
        printf("Server type socket selected.\n\n");
        makeServerSocket(argv, server, client, serverSocketFD, clientSocketFD, buffer);
        while (1) {
            // make the server accecpt incoming messages
            clientSocketFD=accept(serverSocketFD, (struct sockaddr*) &client, sizeof(client));
            printf("%s:%d connected.\n", inet_ntoa(client.sin_addr), inet_ntohs(client.sin_port));
            // receive incoming message from the client
            recv(clientSocketFD, buffer, MAX_BUFFER_SIZE, 0);
            // check if client wanted to stop the connection
            if (*buffer=="quit")  {
                close(serverSocketFD);
                close(clientSocketFD);
            }
            // send back anything that was send
            send(clientSocketFD, buffer, MAX_BUFFER_SIZE, 0);
        }
    } else {
        printf("Client type socket selected.\n\n");
        makeClientSocket(argv, server, client, serverSocketFD, clientSocketFD, buffer);
        // send message to server
        printf("Enter message to send to server:\n");
        scanf("%s", &buffer);
        printf("Sending %s to %s:%d\n", buffer, inet_ntoa(server.sin_addr), inet_ntohs(server.sin_port));
        send(clientSocketFD, strcat(buffer, "\n"), sizeof(buffer), 0);
        // while there are data to be read
        do {
            bzero(buffer, MAX_BUFFER_SIZE);
            bytesRead=recv(clientSocketFD, buffer, MAX_BUFFER_SIZE, 0);
            printf("Incoming message from %s%d", inet_ntoa(server.sin_addr), inet_ntohs(server.sin_port), buffer);
        } while (bytesRead>0);
        // clean up
        close(clientSocketFD);
    }
    return EXIT_SUCCESS;
}

/**
*
*/
void error(char *message) {
    perror(message);
    exit(1);
}

/**
*
*/
void makeServerSocket (char[] *argv, struct sockaddr_in &server, struct sockaddr_in &client, int &serverSocketFD, int &clientSocketFD, char &buffer)
{
    // create server socket
    if ((serverSocketFD=socket(AF_INET, STREAM, 0))<1) error("Can not create server socket.\n");
    // set up socket connection
    bzero(&server, sizeof(&server));
    server.sin_family=AF_NET;
    server.sin_addr.s_addr=INADDR_ANY;
    server.sin_port=hton(argv[1]);
    // bind the socket to a port
    if (bind(serverSocketFD, (struct *sockaddr)&server, sizeof(server))==0) error("Can not bind socket to port.\n");
      // make the socket listen
    if (listen(serverSocketFD, MAX_CONNECTIONS)==0) error("Can not make socket listen to incoming messages.\n");
}

/**
 *
 */
void makeClientSocket(char[] *argv, struct sockaddr_in &server, struct sockaddr_in &client, int &serverSocketFD, int &clientSocketFD, char &buffer)
{
    // create client socket
    if ((clientSocketFD=socket(AF_INET, STREAM, 0) < 1)) error("Can not create client socket");
    // set up server connection
    server.sin_family=AF_NET;
    server.sin_port=htons(argv[1]);
    if (inet_aton(argv[0], &server.sin_addr.s_addr)==0) error("Server IP address error.\n");
    // connect the client to the server
    if (connect(clientSocketFD, (struct sockaddr*)&server, sizeof(server))!=0) error("Can not connect to the server.\n");
}

sockets.c:39: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token
sockets.c:40: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token
sockets.c: In function ‘main’:
sockets.c:64: warning: passing argument 3 of ‘accept’ makes pointer from integer without a cast
sockets.c:69: warning: comparison between pointer and integer
sockets.c: At top level:
sockets.c:107: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token
sockets.c:125: error: expected ‘;’, ‘,’ or ‘)’ before ‘*’ token

void makeServerSocket (char[] *, struct sockaddr_in &, struct sockaddr_in &, int &, int &, char &);
void makeClientSocket (char[] *, struct sockaddr_in &, struct sockaddr_in &, int &, int &, char &);

void makeServerSocket (char *[], struct sockaddr_in *, struct sockaddr_in *, int, int, char);
void makeClientSocket (char *[], struct sockaddr_in *, struct sockaddr_in *, int, int, char);