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freebsd-nq/usr.sbin/ppp/descriptor.h

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o Introduce struct descriptor. This will ultimately be a member of a list of descriptors and their handler functions on which we need to select() in the main loop. o Make struct physical into a `sort' of struct descriptor.
1998-02-09 19:21:11 +00:00
/*-
* Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
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* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 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.
*
o Introduce struct descriptor. This will ultimately be a member of a list of descriptors and their handler functions on which we need to select() in the main loop. o Make struct physical into a `sort' of struct descriptor.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
o Introduce struct descriptor. This will ultimately be a member of a list of descriptors and their handler functions on which we need to select() in the main loop. o Make struct physical into a `sort' of struct descriptor.
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* 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
* SUCH DAMAGE.
*
o If we come out of select() with only write descriptors that end up writing zero bytes, sleep for 1/10 of a second so that we don't end up using up too much cpu. This should only ever happen on systems that wrongly report a descriptor as writable despite the tty buffer being full. Discussed with: Jeff Evarts o Do an initial run-time check to see if select() alters the passed timeval. This knowledge isn't yet used, but will be soon.
1998-06-24 19:33:36 +00:00
* $Id: descriptor.h,v 1.3 1998/05/23 22:24:34 brian Exp $
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*/
o Introduce struct descriptor. This will ultimately be a member of a list of descriptors and their handler functions on which we need to select() in the main loop. o Make struct physical into a `sort' of struct descriptor.
1998-02-09 19:21:11 +00:00
#define PHYSICAL_DESCRIPTOR (1)
Move the terminal/diagnostic socket stuff out of main.c and into the new `prompt.c'. struct prompt is (of course) a `sort' of descriptor.
1998-02-10 03:23:50 +00:00
#define SERVER_DESCRIPTOR (2)
#define PROMPT_DESCRIPTOR (3)
Update to version 2.0-beta Allow for NULL fd_sets in descriptor_UpdateSet() Reimplement the entire chat module, creating `struct chat' - a `type' of struct descriptor. Remove CARRIER logging. CONNECT logging now only logs "CONNECT" lines. CHAT logging masks it with an entire log of the conversation. Modem dialing is now asynchronous, including pauses and timeouts :-) The hooks in DoLoop() in main.c are *very* messy ! I'll have to rewrite DoLoop fairly soon, so I don't care too much for the moment. This code is pretty raw.
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#define CHAT_DESCRIPTOR (4)
Create struct datalink. This is a type of physical link that can chat and talk LCP & CCP. A bundle contains a list of these (only one in the list for the moment). The datalink is a type of descriptor, and dials, enters LCP (& does CCP), kicks the bundle when its FSMs do something interesting and does the hangup chat script on the way down. It also handles redials and reconnects. There are lots of loose ends, and probably lots of bugs, but the data structures are getting there !
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#define DATALINK_DESCRIPTOR (5)
Make struct bundle into a sort of `struct descriptor'. It does the fdsets/reads/writes for each of it's datalinks.
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#define BUNDLE_DESCRIPTOR (6)
o Add the link name to modem diagnostics. o Create struct mpserver as part of struct mp. mpserver creates a unix-domain socket based on the peers auth name and endpoint discriminator. If it already exists, ppp will ``pass the link'' over to the owner of the socket, joining it into the bundle of another ppp invocation, otherwise ppp waits for other invocations to pass it links through this socket. The final piece of code will be the code that flattens our datalink info and passes it down this channel (not yet implemented).
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#define MPSERVER_DESCRIPTOR (7)
o Introduce struct descriptor. This will ultimately be a member of a list of descriptors and their handler functions on which we need to select() in the main loop. o Make struct physical into a `sort' of struct descriptor.
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o Move alias function pointers into loadalias.c o Move Var*Version into command.c o Remove struct pppVars (and there was much rejoicing) ! o Forward-decl some structs in .h files to avoid include ordering requirements and remove a few more redundant #includes.
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struct bundle;
o Introduce struct descriptor. This will ultimately be a member of a list of descriptors and their handler functions on which we need to select() in the main loop. o Make struct physical into a `sort' of struct descriptor.
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struct descriptor {
int type;
int (*UpdateSet)(struct descriptor *, fd_set *, fd_set *, fd_set *, int *);
Make struct bundle into a sort of `struct descriptor'. It does the fdsets/reads/writes for each of it's datalinks.
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int (*IsSet)(struct descriptor *, const fd_set *);
Pass the fdset to descriptor_Read & descriptor_Write allowing support for the use of multiple file descriptors.
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void (*Read)(struct descriptor *, struct bundle *, const fd_set *);
o If we come out of select() with only write descriptors that end up writing zero bytes, sleep for 1/10 of a second so that we don't end up using up too much cpu. This should only ever happen on systems that wrongly report a descriptor as writable despite the tty buffer being full. Discussed with: Jeff Evarts o Do an initial run-time check to see if select() alters the passed timeval. This knowledge isn't yet used, but will be soon.
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int (*Write)(struct descriptor *, struct bundle *, const fd_set *);
o Introduce struct descriptor. This will ultimately be a member of a list of descriptors and their handler functions on which we need to select() in the main loop. o Make struct physical into a `sort' of struct descriptor.
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};
#define descriptor_UpdateSet(d, r, w, e, n) ((*(d)->UpdateSet)(d, r, w, e, n))
#define descriptor_IsSet(d, s) ((*(d)->IsSet)(d, s))
Pass the fdset to descriptor_Read & descriptor_Write allowing support for the use of multiple file descriptors.
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#define descriptor_Read(d, b, f) ((*(d)->Read)(d, b, f))
o Remove the global CcpInfo. It's now part of the datalink. Struct bundle will have its own struct ccp in the future too. o The ``set stopped'' command now requires context and doesn't work on the IPCP FSM. o Check if it's time to break out of our top level loop before doing a select - otherwise, we'll select forever :-( o Remove `struct link'::ccp (a temporary hack). It turns out that IpStartOutput() calls link_Output() and link_Output() incorrectly calls StartOutput() (really modem_StartOutput) requiring the ccp knowledge so that it can call IpStartOutput()... The end result is that the whole IP output queue gets dumped into the modem output queue and a pile of physical writes are done prematurely. This makes the (original) code in main() actually work in that it would not bother selecting() on the tun descriptor when our modem queue length was 20 or greater. Instead, we now make that decision based on the overall queue length. This will need improvement later.
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#define descriptor_Write(d, b, f) ((*(d)->Write)(d, b, f))
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