void
rfbAuthNewClient(rfbClientPtr cl)
{
int32_t securityType = rfbSecTypeInvalid;
if (!cl->screen->authPasswdData || cl->reverseConnection) {
/* chk if this condition is valid or not. */
securityType = rfbSecTypeNone;
} else if (cl->screen->authPasswdData) {
securityType = rfbSecTypeVncAuth;
}
if (cl->protocolMajorVersion==3 && cl->protocolMinorVersion < 7)
{
/* Make sure we use only RFB 3.3 compatible security types. */
if (securityType == rfbSecTypeInvalid) {
rfbLog("VNC authentication disabled - RFB 3.3 client rejected\n");
rfbClientConnFailed(cl, "Your viewer cannot handle required "
"authentication methods");
return;
}
rfbSendSecurityType(cl, securityType);
} else {
/* Here it's ok when securityType is set to rfbSecTypeInvalid. */
rfbSendSecurityTypeList(cl, securityType);
}
}
static void rfbProcessClientProtocolVersion(rfbClientPtr cl)
{
rfbProtocolVersionMsg pv;
int n, major, minor;
char failureReason[256];
if ((n = ReadExact(cl, pv, sz_rfbProtocolVersionMsg)) <= 0) {
if (n == 0)
debug_printf("rfbProcessClientProtocolVersion: client gone\n");
else
debug_printf("rfbProcessClientProtocolVersion: read");
rfbCloseClient(cl);
return;
}
pv[sz_rfbProtocolVersionMsg] = 0;
if (sscanf(pv,rfbProtocolVersionFormat,&major,&minor) != 2) {
debug_printf("rfbProcessClientProtocolVersion: not a valid RFB client\n");
rfbCloseClient(cl);
return;
}
debug_printf("Protocol version %d.%d\n", major, minor);
if (major != rfbProtocolMajorVersion) {
/* Major version mismatch - send a ConnFailed message */
debug_printf("Major version mismatch\n");
sprintf(failureReason,
"RFB protocol version mismatch - server %d.%d, client %d.%d",
rfbProtocolMajorVersion,rfbProtocolMinorVersion,major,minor);
rfbClientConnFailed(cl, failureReason);
return;
}
if (minor != rfbProtocolMinorVersion) {
/* Minor version mismatch - warn but try to continue */
debug_printf("Ignoring minor version mismatch\n");
}
//每个客户端都会发送自己的proto
cl->protocolMajorVersion=major;
cl->protocolMinorVersion=minor;
rfbAuthNewClient(cl);
}
