* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
static char sccsid
[] = "@(#)network.c 8.2 (Berkeley) 12/15/93";
unsigned char netobuf
[2*BUFSIZ
], netibuf
[BUFSIZ
];
* Initialize internal network data structures.
if (ring_init(&netoring
, netobuf
, sizeof netobuf
) != 1) {
if (ring_init(&netiring
, netibuf
, sizeof netibuf
) != 1) {
* Check to see if any out-of-band data exists on a socket (for
* Telnet "synch" processing).
static struct timeval timeout
= { 0 };
value
= select(net
+1, (fd_set
*)0, (fd_set
*)0, &excepts
, &timeout
);
} while ((value
== -1) && (errno
== EINTR
));
if (FD_ISSET(net
, &excepts
)) {
* Sets "neturg" to the current location.
* Send as much data as possible to the network,
* handling requests for urgent data.
* The return value indicates whether we did any
ring_encrypt(&netoring
, encrypt_output
);
if ((n1
= n
= ring_full_consecutive(&netoring
)) > 0) {
if (!ring_at_mark(&netoring
)) {
n
= send(net
, (char *)netoring
.consume
, n
, 0); /* normal write */
* In 4.2 (and 4.3) systems, there is some question about
* what byte in a sendOOB operation is the "OOB" data.
* To make ourselves compatible, we only send ONE byte
* out of band, the one WE THINK should be OOB (though
* we really have more the TCP philosophy of urgent data
* rather than the Unix philosophy of OOB data).
n
= send(net
, (char *)netoring
.consume
, 1, MSG_OOB
);/* URGENT data */
if (errno
!= ENOBUFS
&& errno
!= EWOULDBLOCK
) {
ring_clear_mark(&netoring
);
Dump('>', netoring
.consume
, n
);
ring_consumed(&netoring
, n
);
* If we sent all, and more to send, then recurse to pick
if ((n1
== n
) && ring_full_consecutive(&netoring
)) {