//make sure the dll can be opened by the file system, then write the
//file back out again so it can be loaded is a library. If the read
//fails then the dll is probably not in the pk3 and we are running
//a pure server -rww
UnpackDLLResult Sys_UnpackDLL(const char *name)
{
UnpackDLLResult result = {};
void *data;
int len = FS_ReadFile(name, &data);
if (len >= 1)
{
if (FS_FileIsInPAK(name, NULL) == 1)
{
char *tempFileName;
if ( FS_WriteToTemporaryFile(data, len, &tempFileName) )
{
result.tempDLLPath = tempFileName;
result.succeeded = true;
}
}
}
FS_FreeFile(data);
return result;
}
/*
=================
SV_VerifyPaks_f
If we are pure, disconnect the client if they do no meet the following conditions:
1. the first two checksums match our view of cgame and ui
2. there are no any additional checksums that we do not have
This routine would be a bit simpler with a goto but i abstained
=================
*/
static void SV_VerifyPaks_f( client_t *cl ) {
int nChkSum1, nChkSum2, nClientPaks, nServerPaks, i, j, nCurArg;
int nClientChkSum[1024];
int nServerChkSum[1024];
const char *pPaks, *pArg;
qboolean bGood = qtrue;
// if we are pure, we "expect" the client to load certain things from
// certain pk3 files, namely we want the client to have loaded the
// ui and cgame that we think should be loaded based on the pure setting
//
if ( sv_pure->integer != 0 ) {
bGood = qtrue;
nChkSum1 = nChkSum2 = 0;
// we run the game, so determine which cgame and ui the client "should" be running
bGood = (FS_FileIsInPAK("vm/cgame.qvm", &nChkSum1) == 1);
if (bGood)
bGood = (FS_FileIsInPAK("vm/ui.qvm", &nChkSum2) == 1);
nClientPaks = Cmd_Argc();
// start at arg 2 ( skip serverId cl_paks )
nCurArg = 1;
pArg = Cmd_Argv(nCurArg++);
if(!pArg) {
bGood = qfalse;
}
else
{
// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=475
// we may get incoming cp sequences from a previous checksumFeed, which we need to ignore
// since serverId is a frame count, it always goes up
if (atoi(pArg) < sv.checksumFeedServerId)
{
Com_DPrintf("ignoring outdated cp command from client %s\n", cl->name);
return;
}
}
// we basically use this while loop to avoid using 'goto' :)
while (bGood) {
// must be at least 6: "cl_paks cgame ui @ firstref ... numChecksums"
// numChecksums is encoded
if (nClientPaks < 6) {
bGood = qfalse;
break;
}
// verify first to be the cgame checksum
pArg = Cmd_Argv(nCurArg++);
if (!pArg || *pArg == '@' || atoi(pArg) != nChkSum1 ) {
bGood = qfalse;
break;
}
// verify the second to be the ui checksum
pArg = Cmd_Argv(nCurArg++);
if (!pArg || *pArg == '@' || atoi(pArg) != nChkSum2 ) {
bGood = qfalse;
break;
}
// should be sitting at the delimeter now
pArg = Cmd_Argv(nCurArg++);
if (*pArg != '@') {
bGood = qfalse;
break;
}
// store checksums since tokenization is not re-entrant
for (i = 0; nCurArg < nClientPaks; i++) {
nClientChkSum[i] = atoi(Cmd_Argv(nCurArg++));
}
// store number to compare against (minus one cause the last is the number of checksums)
nClientPaks = i - 1;
// make sure none of the client check sums are the same
// so the client can't send 5 the same checksums
for (i = 0; i < nClientPaks; i++) {
for (j = 0; j < nClientPaks; j++) {
if (i == j)
continue;
if (nClientChkSum[i] == nClientChkSum[j]) {
bGood = qfalse;
break;
}
}
if (bGood == qfalse)
break;
}
if (bGood == qfalse)
break;
// get the pure checksums of the pk3 files loaded by the server
pPaks = FS_LoadedPakPureChecksums();
Cmd_TokenizeString( pPaks );
nServerPaks = Cmd_Argc();
if (nServerPaks > 1024)
nServerPaks = 1024;
for (i = 0; i < nServerPaks; i++) {
nServerChkSum[i] = atoi(Cmd_Argv(i));
}
// check if the client has provided any pure checksums of pk3 files not loaded by the server
for (i = 0; i < nClientPaks; i++) {
for (j = 0; j < nServerPaks; j++) {
if (nClientChkSum[i] == nServerChkSum[j]) {
break;
}
}
if (j >= nServerPaks) {
bGood = qfalse;
break;
}
}
if ( bGood == qfalse ) {
break;
}
// check if the number of checksums was correct
nChkSum1 = sv.checksumFeed;
for (i = 0; i < nClientPaks; i++) {
nChkSum1 ^= nClientChkSum[i];
}
nChkSum1 ^= nClientPaks;
if (nChkSum1 != nClientChkSum[nClientPaks]) {
bGood = qfalse;
break;
}
// break out
break;
}
cl->gotCP = qtrue;
if (bGood) {
cl->pureAuthentic = 1;
}
else {
cl->pureAuthentic = 0;
cl->nextSnapshotTime = -1;
cl->state = CS_ACTIVE;
SV_SendClientSnapshot( cl );
SV_DropClient( cl, "Unpure client detected. Invalid .PK3 files referenced!" );
}
}
}
/*
=================
SV_VerifyPaks_f
If we are pure, disconnect the client if they do no meet the following conditions:
1. the first two checksums match our view of cgame and ui
2. there are no any additional checksums that we do not have
This routine would be a bit simpler with a goto but i abstained
=================
*/
static void SV_VerifyPaks_f( client_t *cl ) {
int nChkSum1, nChkSum2, nClientPaks, nServerPaks, i, j, nCurArg;
int nClientChkSum[1024];
int nServerChkSum[1024];
const char *pPaks, *pArg;
qboolean bGood = qtrue;
// if we are pure, we "expect" the client to load certain things from
// certain pk3 files, namely we want the client to have loaded the
// ui and cgame that we think should be loaded based on the pure setting
//
if ( sv_pure->integer != 0 ) {
bGood = qtrue;
nChkSum1 = nChkSum2 = 0;
// we run the game, so determine which cgame and ui the client "should" be running
//dlls are valid too now -rww
if (Cvar_VariableValue( "vm_cgame" ))
{
bGood = (qboolean)(FS_FileIsInPAK("vm/cgame.qvm", &nChkSum1) == 1);
}
else
{
bGood = (qboolean)(FS_FileIsInPAK("cgamex86.dll", &nChkSum1) == 1);
}
if (bGood)
{
if (Cvar_VariableValue( "vm_ui" ))
{
bGood = (qboolean)(FS_FileIsInPAK("vm/ui.qvm", &nChkSum2) == 1);
}
else
{
bGood = (qboolean)(FS_FileIsInPAK("uix86.dll", &nChkSum2) == 1);
}
}
nClientPaks = Cmd_Argc();
// start at arg 1 ( skip cl_paks )
nCurArg = 1;
// we basically use this while loop to avoid using 'goto' :)
while (bGood) {
// must be at least 6: "cl_paks cgame ui @ firstref ... numChecksums"
// numChecksums is encoded
if (nClientPaks < 6) {
bGood = qfalse;
break;
}
// verify first to be the cgame checksum
pArg = Cmd_Argv(nCurArg++);
if (!pArg || *pArg == '@' || atoi(pArg) != nChkSum1 ) {
bGood = qfalse;
break;
}
// verify the second to be the ui checksum
pArg = Cmd_Argv(nCurArg++);
if (!pArg || *pArg == '@' || atoi(pArg) != nChkSum2 ) {
bGood = qfalse;
break;
}
// should be sitting at the delimeter now
pArg = Cmd_Argv(nCurArg++);
if (*pArg != '@') {
bGood = qfalse;
break;
}
// store checksums since tokenization is not re-entrant
for (i = 0; nCurArg < nClientPaks; i++) {
nClientChkSum[i] = atoi(Cmd_Argv(nCurArg++));
}
// store number to compare against (minus one cause the last is the number of checksums)
nClientPaks = i - 1;
// make sure none of the client check sums are the same
// so the client can't send 5 the same checksums
for (i = 0; i < nClientPaks; i++) {
for (j = 0; j < nClientPaks; j++) {
if (i == j)
continue;
if (nClientChkSum[i] == nClientChkSum[j]) {
bGood = qfalse;
break;
}
}
if (bGood == qfalse)
break;
}
if (bGood == qfalse)
break;
// get the pure checksums of the pk3 files loaded by the server
pPaks = FS_LoadedPakPureChecksums();
Cmd_TokenizeString( pPaks );
nServerPaks = Cmd_Argc();
if (nServerPaks > 1024)
nServerPaks = 1024;
for (i = 0; i < nServerPaks; i++) {
nServerChkSum[i] = atoi(Cmd_Argv(i));
}
// check if the client has provided any pure checksums of pk3 files not loaded by the server
for (i = 0; i < nClientPaks; i++) {
for (j = 0; j < nServerPaks; j++) {
if (nClientChkSum[i] == nServerChkSum[j]) {
break;
}
}
if (j >= nServerPaks) {
bGood = qfalse;
break;
}
}
if ( bGood == qfalse ) {
break;
}
// check if the number of checksums was correct
nChkSum1 = sv.checksumFeed;
for (i = 0; i < nClientPaks; i++) {
nChkSum1 ^= nClientChkSum[i];
}
nChkSum1 ^= nClientPaks;
if (nChkSum1 != nClientChkSum[nClientPaks]) {
bGood = qfalse;
break;
}
// break out
break;
}
if (bGood) {
cl->pureAuthentic = 1;
}
else {
cl->pureAuthentic = 0;
cl->nextSnapshotTime = -1;
cl->state = CS_ACTIVE;
SV_SendClientSnapshot( cl );
SV_DropClient( cl, "Unpure client detected. Invalid .PK3 files referenced!" );
}
}
}
// -1 : error, 0 : map already exists, 1 : ok
int DL_Begin( const char *map, qboolean nonblocking )
{
char url[1024];
char urlt[1024];
CURLMcode resm;
char *c;
if (!clc.demoplaying) Cvar_Set( "cl_downloadDemo", "" );
if( DL_Active() ) {
Com_Printf("Already downloading map '%s'.\n", Cvar_VariableString("cl_downloadName") );
return -1;
}
if (FS_FileIsInPAK(va("maps/%s.bsp", map), NULL) != -1) {
Com_Printf("Map already exists locally.\n");
return 0;
}
if (strncasecmp(dl_source->string, "http://", 7)) {
if (strstr(dl_source->string, "://")) {
Com_Printf("Invalid dl_source.\n");
return -1;
}
Cvar_Set("dl_source", va("http://%s", dl_source->string));
}
if ((c = strstr(dl_source->string, "%m")) == 0) {
Com_Printf("Cvar dl_source is missing a %%m token.\n");
return -1;
}
if (strlen(dl_source->string) -2 +strlen(curl_easy_escape(curl, map, 0)) >= sizeof(url)) {
Com_Printf("Cvar dl_source too large.\n");
return -1;
}
Q_strncpyz(url, dl_source->string, c-dl_source->string +1); // +1 makes room for the trailing 0
Com_sprintf(urlt, sizeof(urlt), "%s%s%s", url, curl_easy_escape(curl, map, 0), c+2);
strcpy(url,urlt);
// set a default destination filename; Content-Disposition headers will override.
Com_sprintf(path, sizeof(path), "%s.pk3", map);
curl = curl_easy_init();
if (!curl) {
Com_Printf("Download failed to initialize.\n");
return -1;
}
*dl_error = 0;
*motd = 0;
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_USERAGENT, useragent);
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1); // fail if http returns an error code
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, Curl_WriteCallback_f);
curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, Curl_HeaderCallback_f);
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, Curl_VerboseCallback_f);
curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0);
curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, Curl_ProgressCallback_f);
//curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, (curl_off_t)(4*1024) ); // 4 KB/s for testing timeouts
if( nonblocking )
{
curlm = curl_multi_init();
if( !curlm )
{
curl_easy_cleanup( curl );
curl = NULL;
Com_Printf("Download failed to initialize ( nonblocking ).\n");
return -1;
}
resm = curl_multi_add_handle( curlm, curl );
if( resm != CURLM_OK )
{
curl_multi_cleanup( curlm );
curl_easy_cleanup( curl );
curlm = NULL;
curl = NULL;
Com_Printf("Download failed to initialize ( nonblocking ).\n");
return -1;
}
}
Com_Printf("Attempting download: %s\n", url);
Cvar_Set( "cl_downloadName", map ); // show the ui download progress screen
Cvar_SetValue( "cl_downloadSize", 0 );
Cvar_SetValue( "cl_downloadCount", 0 );
Cvar_SetValue( "cl_downloadTime", cls.realtime ); // download start time offset
return 1;
}
