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#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include "main.h"
#include "sdl_udp.h"
#define BUFSIZE 1000
sock_sdl_udp_t* newSdlSockUdp()
{
sock_sdl_udp_t *new;
new = malloc( sizeof(sock_sdl_udp_t) );
memset(new, 0, sizeof(sock_sdl_udp_t));
if( !( new->packet = SDLNet_AllocPacket(512) ) )
{
fprintf(stderr, "nemozem alokovat pamat pre packet !\n");
destroySockSdlUdp(new);
}
return new;
}
void destroySockSdlUdp(sock_sdl_udp_t *p)
{
assert( p != NULL );
SDLNet_FreePacket(p->packet);
free(p);
}
sock_sdl_udp_t* bindSdlUdpSocket(int port)
{
sock_sdl_udp_t *new;
assert( port > 0 && port < 65535 );
new = newSdlSockUdp();
assert( new != NULL );
if( SDLNet_Init() < 0 )
{
fprintf(stderr, "nemozem initcializovat SDLnet !\n");
destroySockSdlUdp(new);
return NULL;
}
if( !( new->sock = SDLNet_UDP_Open(port) ) )
{
fprintf(stderr, "nemozem otovrit socket !\n");
destroySockSdlUdp(new);
return NULL;
}
new->type = SDL_UDP_SERVER;
return new;
}
sock_sdl_udp_t* connectSdlUdpSocket(char *address, int port)
{
sock_sdl_udp_t *new;
assert( address != NULL );
assert( port > 0 && port < 65536 );
new = newSdlSockUdp();
assert( new != NULL );
/* Initialize SDL_net */
if( SDLNet_Init() < 0 )
{
fprintf(stderr, "nemozem initcializovat SDLnet !\n");
destroySockSdlUdp(new);
return NULL;
}
/* Open a socket on random port */
if( !( new->sock = SDLNet_UDP_Open(0) ) )
{
fprintf(stderr, "nemozem otovrit socket !\n");
destroySockSdlUdp(new);
return NULL;
}
/* Resolve server name */
if( SDLNet_ResolveHost(&(new->srvadd), address, port) )
{
fprintf(stderr, "nemozem sa pripojit na sokcet !\n");
destroySockSdlUdp(new);
return NULL;
}
new->type = SDL_UDP_CLIENT;
return new;
}
int readSdlUdpSocket(sock_sdl_udp_t *src, sock_sdl_udp_t *dst, void *address, int len)
{
int x;
if( SDLNet_UDP_Recv(src->sock, dst->packet) )
{
x = (dst->packet->len > len ? len : dst->packet->len);
memcpy(address, dst->packet->data, x);
return x;
}
return -1;
}
int writeSdlUdpSocket(sock_sdl_udp_t *src, sock_sdl_udp_t *dst, void *address, int len)
{
assert( src != NULL );
assert( address != NULL );
memcpy(dst->packet->data, address, len);
dst->packet->len = len;
if( src->type == SDL_UDP_CLIENT )
{
dst->packet->address.host = src->srvadd.host;
dst->packet->address.port = src->srvadd.port;
}
SDLNet_UDP_Send(src->sock, -1, dst->packet);
return len;
}
int getSockSdlUdpPort(sock_sdl_udp_t *p)
{
assert( p != NULL );
return p->packet->address.port;
}
void closeSdlUdpSocket(sock_sdl_udp_t *p)
{
assert( p != NULL );
SDLNet_UDP_Close(p->sock);
printf("close connect\n");
destroySockSdlUdp(p);
}
#if 0
int main(int argc, char *argv[])
{
sock_sdl_udp_t *sock;
char buf[BUFSIZE];
int ret;
if( strcmp(argv[1], "s") == 0 )
{
sock_sdl_udp_t *cli;
sock = bindSdlUdpSocket( atoi(argv[2]) );
cli = newSdlSockUdp();
while(1)
{
memset(buf, 0, BUFSIZE);
ret = readSdlUdpSocket(sock, cli, buf, BUFSIZE);
if( ret > 0 )
{
writeSdlUdpSocket(sock, cli, buf, ret);
}
}
}
if( strcmp(argv[1], "c") == 0 )
{
sock = connectSdlUdpSocket("127.0.0.1", atoi(argv[2]));
strcpy(buf, "Hello world !\n");
writeSdlUdpSocket(sock, sock, buf, strlen(buf));
while(1)
{
memset(buf, 0, BUFSIZE);
ret = readSdlUdpSocket(sock, sock, buf, BUFSIZE);
if( ret > 0 )
{
printf("buf = %s", buf);
}
}
closeSdlUdpSocket(sock);
}
return 0;
}
#endif
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