I have a question and I hope someone can help me out with some information:
I have coded a chat server in PureBasic (what else
.Is it possible to connect to this server with a Java or C/C++ Client?
I mean i Have a simple TCP/IP client that can send a string to a server.
What is necessary to send to the PB Server so that it recognizes a client that wishes to connect?
Is this possible at all?
It would be great if I can write a simple client on may Android phone with JAVA to talk
over my PB Server.
Here you can see the code for e really simple c client that can connect to a server.
It is built just with a sample I found in a C/C++ programming book:
But if I point it to my PB Server nothing happens on the server.
The C client works an can connect to an appropriate C server.
Thanx in advance for your time!!!
Andi
Code: Select all
/* client.c */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifdef _WIN32
/* Headerfiles für Windows */
#include <winsock.h>
#include <io.h>
#else
/* Headerfiles für UNIX/Linux */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <unistd.h>
#endif
#define PORT 1234
#define RCVBUFSIZE 8192
/* Funktion gibt aufgetretenen Fehler aus und
* beendet die Anwendung. */
static void error_exit(char *errorMessage) {
#ifdef _WIN32
fprintf(stderr,"%s: %d\n", errorMessage, WSAGetLastError());
#else
fprintf(stderr, "%s: %s\n", errorMessage, strerror(errno));
#endif
exit(EXIT_FAILURE);
}
int main( int argc, char *argv[]) {
struct sockaddr_in server;
struct hostent *host_info;
unsigned long addr;
#ifdef _WIN32
SOCKET sock;
#else
int sock;
#endif
char *echo_string;
int echo_len;
#ifdef _WIN32
/* Initialisiere TCP für Windows ("winsock"). */
WORD wVersionRequested;
WSADATA wsaData;
wVersionRequested = MAKEWORD (1, 1);
if (WSAStartup (wVersionRequested, &wsaData) != 0)
error_exit( "Fehler beim Initialisieren von Winsock");
else
printf("Winsock initialisiert\n");
#endif
/* Sind die erforderlichen Kommandozeilenargumente vorhanden? */
if (argc < 3)
error_exit("usage: client server-ip echo_word\n");
/* Erzeuge das Socket. */
sock = socket( AF_INET, SOCK_STREAM, 0 );
if (sock < 0)
error_exit( "Fehler beim Anlegen eines Sockets");
/* Erzeuge die Socketadresse des Servers.
* Sie besteht aus Typ, IP-Adresse und Portnummer. */
memset( &server, 0, sizeof (server));
if ((addr = inet_addr( argv[1])) != INADDR_NONE) {
/* argv[1] ist eine numerische IP-Adresse. */
memcpy( (char *)&server.sin_addr, &addr, sizeof(addr));
}
else {
/* Für den Fall der Fälle: Wandle den
* Servernamen bspw. "localhost" in eine IP-Adresse um. */
host_info = gethostbyname(argv[1]);
if (NULL == host_info)
error_exit("Unbekannter Server");
/* Server-IP-Adresse */
memcpy( (char *)&server.sin_addr,
host_info->h_addr, host_info->h_length );
}
/* IPv4-Verbindung */
server.sin_family = AF_INET;
/* Portnummer */
server.sin_port = htons( PORT );
/* Baue die Verbindung zum Server auf. */
if(connect(sock,(struct sockaddr*)&server,sizeof(server)) <0)
error_exit("Kann keine Verbindung zum "
"Server herstellen");
/* Zweites Argument wird als "echo" beim Server verwendet. */
echo_string = argv[2];
/* Länge der Eingabe */
echo_len = strlen(echo_string);
/* den String inkl. Nullterminator an den Server senden */
if (send(sock, echo_string, echo_len, 0) != echo_len)
error_exit("send() hat eine andere Anzahl"
" von Bytes versendet als erwartet !!!!");
/* Schließe Verbindung und Socket. */
#ifdef _WIN32
closesocket(sock);
/* Cleanup Winsock */
WSACleanup();
#else
close(sock);
#endif
return EXIT_SUCCESS;
}
