Function SysReceive

Kernel/src/arch/x86_64/syscalls.cpp:1407–1432

* SysReceive (sockfd, buf, len, flags) - Receive data through a socket * sockfd - Socket file descriptor * buf - data * len - data length * flags - flags * * On Success - return amount of data read * On Failure - return -1 */

 * On Failure - return -1
 */
long SysReceive(regs64_t* r){
	process_t* proc = Scheduler::GetCurrentProcess();
	fs_fd_t* handle = proc->fileDescriptors.get_at(SC_ARG0(r));

	uint8_t* buffer = (uint8_t*)(SC_ARG1(r));
	size_t len = SC_ARG2(r);
	uint64_t flags = SC_ARG3(r);

	if(!handle){ 
		Log::Warning("sys_send: Invalid file descriptor: ", SC_ARG0(r));
		return -1; 
	}

	if((handle->node->flags & FS_NODE_TYPE) != FS_NODE_SOCKET){
		Log::Warning("sys_send: File (Descriptor: %d) is not a socket", SC_ARG0(r));
		return -2;
	}
	
	if(!Memory::CheckUsermodePointer(SC_ARG1(r), len, proc->addressSpace)){
		Log::Warning("sys_send: Invalid buffer ptr");
		return -3;
	}

	Socket* sock = (Socket*)handle->node;
	return sock->Receive(buffer, len, flags);
}

/* 
 * SysReceiveFrom (sockfd, buf, len, flags, srcaddr, addrlen) - Receive data through a socket