int algo_proc(void *_img)
{
img = (typeof(img))_img;
process();
if (selected(sock)) {
char buf[128];
udprecv(sock, buf, sizeof(buf));
printf("got %c\n", *buf);
if (*buf == 'q')
return 1;
if (*buf == 'a') {
acting = 1;
readxml("./act.xml");
acting = 0;
}
if (*buf == 's')
writexml("./config.xml");
if (*buf == 'l')
readxml("./config.xml");
if (*buf == 'r')
readxml("./default.xml");
writexml("./cur.xml");
}
return 0;
}
int main(int argc, char **argv){
char *optstr = "s:";
char *usage = "npemwinudprecv [-s size] [host] <port>";
int status = 0;
int c;
while((status == 0) && ((c = getopt(argc, argv, optstr)) != -1)){
switch(c){
case 's':
g.size = atoi(optarg);
break;
default:
status = 1;
errx(1, "%s", usage);
break;
}
}
if(optind == argc - 1)
g.service = argv[optind++];
else if(optind == argc - 2){
g.host = argv[optind++];
g.service = argv[optind++];
}else
errx(1, "%s", usage);
status = udprecv();
return(status != 0 ? 1 : 0);
}
size_t net_peer_recv(net_peer_t* peer, void* buf, size_t len, int64_t deadline) {
switch(peer->type) {
case NET_PROTO_UNIX:
return unixrecv((unixsock)peer->socket, buf, len, deadline);
case NET_PROTO_TCP:
return tcprecv((tcpsock)peer->socket, buf, len, deadline);
case NET_PROTO_UDP:
return udprecv((udpsock)peer->socket, 0, buf, len, deadline);
}
return 0;
}
int main() {
udpsock s1 = udplisten(iplocal(NULL, 5555, 0));
udpsock s2 = udplisten(iplocal(NULL, 5556, 0));
ipaddr addr = ipremote("127.0.0.1", 5556, 0, -1);
while(1) {
udpsend(s1, addr, "ABC", 3);
assert(errno == 0);
char buf[3];
size_t sz = udprecv(s2, &addr, buf, sizeof(buf), now() + 100);
if(errno == ETIMEDOUT)
continue;
assert(errno == 0);
assert(sz == 3);
break;
}
while(1) {
udpsend(s2, addr, "DEF", 3);
assert(errno == 0);
char buf[3];
size_t sz = udprecv(s1, &addr, buf, sizeof(buf), now() + 100);
if(errno == ETIMEDOUT)
continue;
assert(errno == 0);
assert(sz == 3);
break;
}
udpclose(s2);
udpclose(s1);
return 0;
}
int main(int argc, char **argv)
{
Uint16 port;
char *host,*fname,*fbasename;
Sint32 flen,pos,p2;
int len,blocks,i,err=0;
Uint32 ack;
IPaddress ip;
UDPsocket sock;
UDPpacket *in, *out;
FILE *f;
/* check our commandline */
if(argc<4)
{
printf("%s host port file\n",argv[0]);
exit(0);
}
/* initialize SDL */
if(SDL_Init(0)==-1)
{
printf("SDL_Init: %s\n",SDL_GetError());
exit(1);
}
/* initialize SDL_net */
if(SDLNet_Init()==-1)
{
printf("SDLNet_Init: %s\n",SDLNet_GetError());
exit(2);
}
/* get the host from the commandline */
host=argv[1];
/* get the port from the commandline */
port=(Uint16) strtol(argv[2],NULL,0);
if(!port)
{
printf("a server port cannot be 0.\n");
exit(3);
}
/* get filename to get from server from commandline */
fname=argv[3];
if(SDLNet_ResolveHost(&ip,host,port)==-1)
{
printf("SDLNet_ResolveHost: %s\n",SDLNet_GetError());
exit(4);
}
/* open udp client socket */
if(!(sock=SDLNet_UDP_Open(0)))
{
printf("SDLNet_UDP_Open: %s\n",SDLNet_GetError());
exit(5);
}
/* allocate max packet */
if(!(out=SDLNet_AllocPacket(65535)))
{
printf("SDLNet_AllocPacket: %s\n",SDLNet_GetError());
exit(6);
}
if(!(in=SDLNet_AllocPacket(65535)))
{
printf("SDLNet_AllocPacket: %s\n",SDLNet_GetError());
exit(6);
}
/* bind server address to channel 0 */
if(SDLNet_UDP_Bind(sock, 0, &ip)==-1)
{
printf("SDLNet_UDP_Bind: %s\n",SDLNet_GetError());
exit(7);
}
/* open output file */
fbasename=strrchr(fname,'/');
if(!fbasename)
fbasename=fname;
else
fbasename++;
printf("writting file: %s\n",fbasename);
if(!(f=fopen(fbasename,"wb")))
{
perror("fopen");
exit(8);
}
/* request file / expect filesize */
printf("requesting file=%s\n",fname);
out->data[0]=1<<4;
strcpy((char*)out->data+1,fname);
out->len=strlen(fname)+2;
if(udpsend(sock,0,out,in,200,1,TIMEOUT)<1)
exit(9);
flen=SDLNet_Read32(in->data+1);
len=SDLNet_Read32(in->data+5);
blocks=(flen+len-1)/len;
printf("flen=%d blocksize=%d blocks=%d\n",flen,len,blocks);
/* send ready / expect file */
printf("starting transfer\n");
out->data[0]=2<<4;
out->len=1;
if(udpsend(sock,0,out,in,10,2,TIMEOUT)<1)
exit(10);
if(flen<0)
{
printf("file not available...\n");
exit(11);
}
pos=0; /* count per 32 blocks */
while(pos*32<blocks && !err)
{
/*printf("pos=%d\n",pos); */
ack=0;
if((pos+1)*32>=blocks)
{
for(i=blocks%32;i<32;i++)
ack|=1<<i;
}
printf("\r "
"\r%3d%% %08x: ",(pos*3200)/blocks,pos*32*len);
while(ack!=0xffffffff && !err)
{
i=in->data[1];
p2=SDLNet_Read32(in->data+2);
/*printf("received %d,%d\n",i,p2); */
if(!(ack&1<<i) && p2>=pos*32*len)
{
fseek(f,p2,SEEK_SET);
fwrite(in->data+6,in->len-6,1,f);
ack|=1<<i;
printf(".");
fflush(stdout);
}
if(ack!=0xffffffff)
err=udprecv(sock,in,10,2,500);
if(err<0)
continue; /* error... */
if(!err)
{
/*printf("sending ack 0x%0X\n",ack); */
out->data[0]=3<<4;
SDLNet_Write32(pos*32*len,out->data+1);
SDLNet_Write32(ack,out->data+5);
out->len=9;
SDLNet_UDP_Send(sock,0,out);
}
err=0;
}
pos++;
}
printf("\ndone.\n");
fclose(f);
/* close the socket */
SDLNet_UDP_Close(sock);
/* free packets */
SDLNet_FreePacket(out);
SDLNet_FreePacket(in);
/* shutdown SDL_net */
SDLNet_Quit();
/* shutdown SDL */
SDL_Quit();
return(0);
}
