WebSocketFrameRef
WebSocketFrameCreateWithPayloadData (CFAllocatorRef allocator, WebSocketFrameOpCode opCode, Boolean isMasked, UInt8 *maskingKey, CFDataRef payload) {
WebSocketFrameRef self = WebSocketFrameCreate(allocator);
if_self {
UInt8 header[2 + 8];
memset(header, 0, sizeof(header));
Boolean isFin = TRUE;
Boolean rsv1 = FALSE;
Boolean rsv2 = FALSE;
Boolean rsv3 = FALSE;
header[0] |= ((isFin ? 1 : 0) << 7);
header[0] |= ((rsv1 ? 1 : 0) << 6);
header[0] |= ((rsv2 ? 1 : 0) << 5);
header[0] |= ((rsv3 ? 1 : 0) << 4);
header[0] |= (opCode & 0xf);
header[1] |= ((isMasked ? 1 : 0) << 7);
CFIndex length = payload != NULL ? CFDataGetLength(payload) : 0;
if (length <= 125) {
header[1] |= (UInt8) length;
WebSocketFrameAppend(self, header, 2);
} else {
if (length < 65535) {
header[1] |= 126;
*((UInt16 *) &header[2]) = OSSwapBigToHostInt16(length);
WebSocketFrameAppend(self, header, 2 + 2);
} else {
header[1] |= 127;
*((UInt64 *) &header[2]) = OSSwapBigToHostInt64(length);
WebSocketFrameAppend(self, header, 2 + 8);
}
}
if (isMasked) {
UInt8 autoMaskingKey[4] = { 0, 0, 0, 0 };
if (maskingKey == NULL) {
* (u_int32_t *) autoMaskingKey = arc4random();
maskingKey = autoMaskingKey;
}
WebSocketFrameAppend(self, maskingKey, 4);
}
if (length > 0) {
WebSocketFrameAppend(self, CFDataGetBytePtr(payload), length);
}
WebSocketFrameParse(self);
}
return self;
}
static
bool_t xdr_CSSM_DATA_FLIPPED(XDR *xdrs, CSSM_DATA *objp)
{
bool_t size_alloc = sec_xdr_arena_size_allocator(xdrs);
if ((xdrs->x_op == XDR_ENCODE) && !size_alloc) {
switch (objp->Length) {
case sizeof(uint32_t): *(uint32_t*)objp->Data = htonl(*(uint32_t*)objp->Data); break;
case sizeof(uint64_t): *(uint64_t*)objp->Data = OSSwapHostToBigInt64(*(uint64_t*)objp->Data); break;
case sizeof(uint8_t): break;
default: assert(FALSE); break;
}
}
if (!xdr_CSSM_DATA(xdrs, objp))
return (FALSE);
if ((xdrs->x_op == XDR_DECODE) && !size_alloc) {
switch (objp->Length) {
case sizeof(uint32_t): *(uint32_t*)objp->Data = ntohl(*(uint32_t*)objp->Data); break;
case sizeof(uint64_t): *(uint64_t*)objp->Data = OSSwapBigToHostInt64(*(uint64_t*)objp->Data); break;
case sizeof(uint8_t): break;
default: assert(FALSE); break;
}
}
return (TRUE);
}
uint64_t fmbe64(uint64_t x) { return OSSwapBigToHostInt64(x); }
