freebsd-dev/usr.sbin/ppp/link.h

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/*-
* Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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
* SUCH DAMAGE.
*
1999-08-28 01:35:59 +00:00
* $FreeBSD$
*
*/
#define PHYSICAL_LINK 1
#define LOGICAL_LINK 2
#define NPROTOSTAT 13
struct bundle;
struct prompt;
struct cmdargs;
struct link {
int type; /* _LINK type */
const char *name; /* Points to datalink::name */
int len; /* full size of parent struct */
struct {
unsigned gather : 1; /* Gather statistics ourself ? */
struct pppThroughput total; /* Link throughput statistics */
struct pppThroughput *parent; /* MP link throughput statistics */
} stats;
struct mqueue Queue[2]; /* Our output queue of mbufs */
u_long proto_in[NPROTOSTAT]; /* outgoing protocol stats */
u_long proto_out[NPROTOSTAT]; /* incoming protocol stats */
o Move struct lcp and struct ccp into struct link. o Remove bundle2lcp(), bundle2ccp() and bundle2link(). They're too resource-hungry and we have `owner pointers' to do their job. o Make our FSM understand LCPs that are always ST_OPENED (with a minimum code that != 1). o Send FSM code rejects for invalid codes. o Make our bundle fsm_parent deal with multiple links. o Make timer diagnostics pretty and allow access via ~t in `term' mode (not just when logging debug) and `show timers'. Only show timers every second in debug mode, otherwise we get too many diagnostics to be useful (we probably still do). Also, don't restrict ~m in term mode to depend on debug logging. o Rationalise our bundles' phases. o Create struct mp (multilink protocol). This is both an NCP and a type of struct link. It feeds off other NCPs for output, passing fragmented packets into the queues of available datalinks. It also gets PROTO_MP input, reassembles the fragments into ppp frames, and passes them back to the HDLC layer that the fragments were passed from. ** It's not yet possible to enter multilink mode :-( ** o Add `set weight' (requires context) for deciding on a links weighting in multilink mode. Weighting is simplistic (and probably badly implemented) for now. o Remove the function pointers in struct link. They ended up only applying to physical links. o Configure our tun device with an MTU equal to the MRU from struct mp's LCP and a speed equal to the sum of our link speeds. o `show {lcp,ccp,proto}' and `set deflate' now have optional context and use ChooseLink() to decide on which `struct link' to use. This allows behaviour as before when in non-multilink mode, and allows access to the MP logical link in multilink mode. o Ignore reconnect and redial values when in -direct mode and when cleaning up. Always redial when in -ddial or -dedicated mode (unless cleaning up). o Tell our links to `staydown' when we close them due to a signal. o Remove remaining `#ifdef SIGALRM's (ppp doesn't function without alarms). o Don't bother strdup()ing our physical link name. o Various other cosmetic changes.
1998-04-03 19:21:56 +00:00
struct lcp lcp; /* Our line control FSM */
struct ccp ccp; /* Our compression FSM */
struct layer const *layer[LAYER_MAX]; /* i/o layers */
int nlayers;
};
#define LINK_QUEUES(link) (sizeof (link)->Queue / sizeof (link)->Queue[0])
#define LINK_HIGHQ(link) ((link)->Queue + LINK_QUEUES(link) - 1)
extern void link_SequenceQueue(struct link *);
extern void link_DeleteQueue(struct link *);
extern size_t link_QueueLen(struct link *);
extern size_t link_QueueBytes(struct link *);
extern struct mbuf *link_Dequeue(struct link *);
extern void link_PushPacket(struct link *, struct mbuf *, struct bundle *,
int, u_short);
extern void link_PullPacket(struct link *, char *, size_t, struct bundle *);
extern int link_Stack(struct link *, struct layer *);
extern void link_EmptyStack(struct link *);
#define PROTO_IN 1 /* third arg to link_ProtocolRecord */
#define PROTO_OUT 2
extern void link_ProtocolRecord(struct link *, u_short, int);
extern void link_ReportProtocolStatus(struct link *, struct prompt *);
extern int link_ShowLayers(struct cmdargs const *);