Function SysAccept

Kernel/src/arch/x86_64/syscalls.cpp:1242–1282

* SysAccept (sockfd, addr, addrlen) - Accept socket connection * sockfd - Socket file descriptor * addr - sockaddr structure * addrlen - size of addr * * On Success - return file descriptor of accepted socket * On Failure - return -1 */

 * On Failure - return -1
 */
long SysAccept(regs64_t* r){
	process_t* proc = Scheduler::GetCurrentProcess();
	fs_fd_t* handle = proc->fileDescriptors.get_at(SC_ARG0(r));
	if(!handle){ 
		Log::Warning("sys_accept: Invalid file descriptor: ", SC_ARG0(r));
		return -1; 
	}

	if((handle->node->flags & FS_NODE_TYPE) != FS_NODE_SOCKET){
		Log::Warning("sys_accept: File (Descriptor: %d) is not a socket", SC_ARG0(r));
		return -2;
	}

	socklen_t* len = (socklen_t*)SC_ARG2(r);
	if(len && !Memory::CheckUsermodePointer(SC_ARG2(r), sizeof(socklen_t), proc->addressSpace)){
		Log::Warning("sys_accept: Invalid socklen ptr");
		return -3;
	}
	
	sockaddr_t* addr = (sockaddr_t*)SC_ARG1(r);
	if(addr && !Memory::CheckUsermodePointer(SC_ARG1(r), *len, proc->addressSpace)){
		Log::Warning("sys_accept: Invalid sockaddr ptr");
		return -3;
	}

	Socket* sock = (Socket*)handle->node;
	
	Socket* newSock = sock->Accept(addr, len, handle->mode);
	if(!newSock){
		return -1;
	}

	int fd = proc->fileDescriptors.get_length();
	fs_fd_t* newHandle = fs::Open(newSock);
	proc->fileDescriptors.add_back(newHandle);

	if(newSock)
		return fd;
	else
		return -1;
}

/* 
 * SysConnect (sockfd, addr, addrlen) - Initiate socket connection