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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <mach.h>
include <ctype.h>
include "ki.h"
# KI_RECEIVE -- Read a machine independent KII packet from the network
# interface and decode it into the internal, machine dependent form in the
# kii common. An error status is returned if the opcode and subcode in
# the packet do not match those expected, or if an i/o error occurs on the
# channel.
int procedure ki_receive (server, opcode, subcode)
int server # node index of server process
int opcode # function opcode
int subcode # function subcode (for drivers)
int stat, ip, op, ch
int gstrcpy()
include "kii.com"
include "kinode.com"
begin
# Read the packet.
call ks_aread (server, p_packet, SZB_PACKET)
call ks_await (server, stat)
# Hard error on the channel to the kernel server.
if (stat == ERR)
return (ERR)
# The encoded packet consists of LEN_INTFIELDS 32 bit MII integers
# followed by p_sbuflen chars, one char per byte.
call miiupk32 (p_packet, FIRSTINTFIELD, LEN_INTFIELDS, TY_INT)
call chrupk (p_packet, LEN_INTFIELDS * 4 + 1, p_sbuf, 1,
max(0, min(SZ_SBUF, p_sbuflen)) + 1)
# Check for out of band data, i.e., the data read was not a packet
# but some unsolicited message, e.g., error message, from the
# called program. If this happens, print the error message and
# return an error status.
if (stat != SZB_PACKET || p_opcode != opcode || p_subcode != subcode) {
# Is it a printable string? If so, print the message in the
# format "node: message".
op = gstrcpy (n_alias[1,1,server], p_sbuf, SZ_ALIAS) + 1
p_sbuf[op] = ':'
op = op + 1
p_sbuf[op] = ' '
op = op + 1
call chrupk (p_packet, 1, p_sbuf, op, SZ_LINE)
do ip = op, SZ_LINE {
ch = p_sbuf[ip]
if (ch == EOS)
break
else if (!IS_ASCII(ch))
call strcpy ("out of band data on ki channel\n", p_sbuf,
SZ_LINE)
}
call xer_putline (STDERR, p_sbuf)
return (ERR)
} else
return (OK)
end
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