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/* This module registers a high score with the official Maelstrom
score server
*/
#include <ctype.h>
#include "SDL_net.h"
#include "Maelstrom_Globals.h"
#include "netscore.h"
#include "checksum.h"
#define NUM_SCORES 10 // Copied from scores.cc
static TCPsocket Goto_ScoreServer(const char *server, int port);
static void Leave_ScoreServer(TCPsocket remote);
/* This function actually registers the high scores */
void RegisterHighScore(Scores high)
{
TCPsocket remote;
int i, n;
unsigned char key[KEY_LEN];
unsigned int keynums[KEY_LEN];
char netbuf[1024], *crc;
remote = Goto_ScoreServer(SCORE_HOST, SCORE_PORT);
if ( remote == NULL ) {
error(
"Warning: Couldn't connect to Maelstrom Score Server.\r\n");
error("-- High Score not registered.\r\n");
return;
}
/* Read the welcome banner */
SDLNet_TCP_Recv(remote, netbuf, 1024);
/* Get the key... */
SDL_strlcpy(netbuf, "SHOWKEY\n", sizeof(netbuf));
SDLNet_TCP_Send(remote, netbuf, strlen(netbuf));
if ( SDLNet_TCP_Recv(remote, netbuf, 1024) <= 0 ) {
error("Warning: Score Server protocol error.\r\n");
error("-- High Score not registered.\r\n");
return;
}
for ( i=0, n=0, crc=netbuf; i < KEY_LEN; ++i, ++n ) {
key[i] = 0xFF;
if ( ! (crc=strchr(++crc, ':')) ||
(SDL_sscanf(crc, ": 0x%x", &keynums[i]) <= 0) )
break;
}
/*error("%d items read:\n", n);*/
if ( n != KEY_LEN )
error("Warning: short authentication key.\n");
for ( i=0; i<n; ++i ) {
key[i] = (keynums[i]&0xFF);
/*error("\t0x%.2x\n", key[i]);*/
}
/* Send the scores */
crc = get_checksum(key, KEY_LEN);
SDL_snprintf(netbuf, sizeof(netbuf), SCOREFMT, crc, high.name, high.score, high.wave);
SDLNet_TCP_Send(remote, netbuf, strlen(netbuf));
n = SDLNet_TCP_Recv(remote, netbuf, 1024);
if ( n > 0 ) {
netbuf[n] = '\0';
if ( strncmp(netbuf, "Accepted!", 9) != 0 ) {
error("New high score was rejected: %s", netbuf);
}
} else
perror("Read error on socket");
Leave_ScoreServer(remote);
}
/* This function is just a hack */
int GetLine(TCPsocket remote, char *buffer, int maxlen)
{
int packed = 0;
static int lenleft, len;
static char netbuf[1024], *ptr=NULL;
if ( buffer == NULL ) {
lenleft = 0;
return(0);
}
if ( lenleft <= 0 ) {
len = SDLNet_TCP_Recv(remote, netbuf, 1024);
if ( len <= 0 )
return(-1);
lenleft = len;
ptr = netbuf;
}
while ( (*ptr != '\n') && (*ptr != '\r') ) {
if ( lenleft <= 0 ) {
len = SDLNet_TCP_Recv(remote, netbuf, 1024);
if ( len <= 0 ) {
*buffer = '\0';
return(packed);
}
lenleft = len;
ptr = netbuf;
}
if ( maxlen == 0 ) {
*buffer = '\0';
return(packed);
}
*(buffer++) = *(ptr++);
++packed;
--maxlen;
--lenleft;
}
++ptr; --lenleft;
*buffer = '\0';
return(packed);
}
/* Load the scores from the network score server */
int NetLoadScores(void)
{
TCPsocket remote;
int i;
char netbuf[1024], *ptr;
remote = Goto_ScoreServer(SCORE_HOST, SCORE_PORT);
if ( remote == NULL ) {
error(
"Warning: Couldn't connect to Maelstrom Score Server.\r\n");
return(-1);
}
/* Read the welcome banner */
SDLNet_TCP_Recv(remote, netbuf, 1024);
/* Send our request */
SDL_strlcpy(netbuf, "SHOWSCORES\n", sizeof(netbuf));
SDLNet_TCP_Send(remote, netbuf, strlen(netbuf));
/* Read the response */
GetLine(remote, NULL, 0);
GetLine(remote, netbuf, 1024-1);
memset(&hScores, 0, NUM_SCORES*sizeof(Scores));
for ( i=0; i<NUM_SCORES; ++i ) {
if ( GetLine(remote, netbuf, 1024-1) < 0 ) {
perror("Read error on socket stream");
break;
}
SDL_strlcpy(hScores[i].name, "Invalid Name", sizeof(hScores[i].name));
for ( ptr = netbuf; *ptr; ++ptr ) {
if ( *ptr == '\t' ) {
/* This is just to remove trailing whitespace
and make sure we don't overflow our buffer.
*/
char *tail = ptr;
int len;
while ( (tail >= netbuf) && isspace(*tail) )
*(tail--) = '\0';
SDL_strlcpy(hScores[i].name, netbuf,
sizeof(hScores[i].name));
if ( (len=strlen(netbuf)) >
(int)(sizeof(hScores[i].name)-1) )
len = (sizeof(hScores[i].name)-1);
hScores[i].name[len] = '\0';
*ptr = '\t';
break;
}
}
if ( SDL_sscanf(ptr, "%u %u", &hScores[i].score,
&hScores[i].wave) != 2 ) {
error(
"Warning: Couldn't read complete score list!\r\n");
error("Line was: %s", netbuf);
break;
}
}
Leave_ScoreServer(remote);
return(0);
}
static TCPsocket Goto_ScoreServer(const char *server, int port)
{
TCPsocket remote;
IPaddress remote_address;
if ( SDLNet_Init() < 0 ) {
return(NULL);
}
/*
* Fill in the structure "serv_addr" with the address of the
* server that we want to connect with.
*/
SDLNet_ResolveHost(&remote_address, server, port);
if ( remote_address.host == INADDR_NONE ) {
/*error("%s: host name error.\n", server);*/
return(NULL);
}
/*
* Open a TCP socket (an Internet stream socket).
*/
remote = SDLNet_TCP_Open(&remote_address);
return(remote);
}
static void Leave_ScoreServer(TCPsocket remote)
{
SDLNet_TCP_Close(remote);
SDLNet_Quit();
}
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