universial udpsym
.directive .nobinary

phase 0
.udfnc:	block	1	;Function code.
.uddev:	block	1	;Device/channel.
.udflg:	block	1	;Flags/mode bits.
	ud.raw==1b0	;    Raw IP packets in/out
	ud.icm==1b1	;    Read all ICMP, as raw packets.
.udlad:	block	1	;local address.
.udrad:	block	1	;remote address.
.udlpr:	block	1	;local port.
.udrpr:	block	1	;remote port.
.udbuf:	block	1	;data block pointer.
.udcnt:	block	1	;data byte count.
.udlen:	block	0	;length of data block.
dephase

;* Error codes:

udilf%==1		;Illegal function.
udadc%==2		;Address check.
udrqe%==3		;Receive queue empty.
udnpv%==4		;Need privs for that.
udtqf%==5		;Transmit queue full. (please wait)
udilp%==6		;Illegal local port.
udila%==7		;Illegal local address.
udirp%==10		;Illegal (zero?) remote port.
udira%==11		;Illegal (zero?) remote address.
udnec%==12		;Not enough core.
udnsd%==13		;No such device.

;* Function codes:

.udget==0		;Get parameters (local/remote port/address, flags)
.udset==1		;Set parapeters
.udwri==2		;Write data
.udrea==3		;Read data
.udchk==4		;Check input queue

end