/* upalloc.c - upalloc */#include <conf.h>#include <kernel.h>#include <proc.h>#include <network.h>#include <ports.h>/*------------------------------------------------------------------------ *  upalloc  -  allocate a UDP port demultiplexing queue *------------------------------------------------------------------------ */intupalloc(void){	struct	upq	*pup;	int		i;	wait(udpmutex);	for (i=0 ; i<UPPS ; i++) {		pup = &upqs[i];		if (!pup->up_valid) {			pup->up_valid = TRUE;			pup->up_port = 0;			pup->up_pid = BADPID;			pup->up_xport = pcreate(UPPLEN);			signal(udpmutex);			return i;		}	}	signal(udpmutex);	return SYSERR;}struct	upq	upqs[UPPS];