ab7d88ae2d
the layering. We now ``stack'' layers as soon as we open the device (when we figure out what we're dealing with). A static set of `dispatch' routines are also declared for dealing with incoming packets after they've been `pulled' up through the stacked layers. Physical devices are now assigned handlers based on the device type when they're opened. For the moment there are three device types; ttys, execs and tcps. o Increment version number to 2.2 o Make an entry in [uw]tmp for non-tty -direct invocations (after pap/chap authentication). o Make throughput counters quad_t's o Account for the absolute number of mbuf malloc()s and free()s in ``show mem''. o ``show modem'' becomes ``show physical''.
341 lines
8.3 KiB
C
341 lines
8.3 KiB
C
/*-
|
|
* 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.
|
|
*
|
|
* $Id: link.c,v 1.8 1999/03/31 14:21:45 brian Exp $
|
|
*
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netdb.h>
|
|
#include <sys/un.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/ip.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <termios.h>
|
|
|
|
#include "defs.h"
|
|
#include "layer.h"
|
|
#include "mbuf.h"
|
|
#include "log.h"
|
|
#include "timer.h"
|
|
#include "lqr.h"
|
|
#include "hdlc.h"
|
|
#include "throughput.h"
|
|
#include "proto.h"
|
|
#include "fsm.h"
|
|
#include "descriptor.h"
|
|
#include "lcp.h"
|
|
#include "ccp.h"
|
|
#include "link.h"
|
|
#include "prompt.h"
|
|
#include "async.h"
|
|
#include "physical.h"
|
|
#include "mp.h"
|
|
#include "iplist.h"
|
|
#include "slcompress.h"
|
|
#include "ipcp.h"
|
|
#include "ip.h"
|
|
#include "auth.h"
|
|
#include "pap.h"
|
|
#include "chap.h"
|
|
#include "cbcp.h"
|
|
|
|
static void Despatch(struct bundle *, struct link *, struct mbuf *, u_short);
|
|
|
|
void
|
|
link_AddInOctets(struct link *l, int n)
|
|
{
|
|
throughput_addin(&l->throughput, n);
|
|
}
|
|
|
|
void
|
|
link_AddOutOctets(struct link *l, int n)
|
|
{
|
|
throughput_addout(&l->throughput, n);
|
|
}
|
|
|
|
void
|
|
link_SequenceQueue(struct link *l)
|
|
{
|
|
log_Printf(LogDEBUG, "link_SequenceQueue\n");
|
|
while (l->Queue[PRI_NORMAL].qlen)
|
|
mbuf_Enqueue(l->Queue + PRI_LINK, mbuf_Dequeue(l->Queue + PRI_NORMAL));
|
|
}
|
|
|
|
void
|
|
link_DeleteQueue(struct link *l)
|
|
{
|
|
struct mqueue *queue;
|
|
|
|
for (queue = l->Queue; queue < l->Queue + LINK_QUEUES; queue++)
|
|
while (queue->top)
|
|
mbuf_Free(mbuf_Dequeue(queue));
|
|
}
|
|
|
|
int
|
|
link_QueueLen(struct link *l)
|
|
{
|
|
int i, len;
|
|
|
|
for (i = 0, len = 0; i < LINK_QUEUES; i++)
|
|
len += l->Queue[i].qlen;
|
|
|
|
return len;
|
|
}
|
|
|
|
int
|
|
link_QueueBytes(struct link *l)
|
|
{
|
|
int i, len, bytes;
|
|
struct mbuf *m;
|
|
|
|
bytes = 0;
|
|
for (i = 0, len = 0; i < LINK_QUEUES; i++) {
|
|
len = l->Queue[i].qlen;
|
|
m = l->Queue[i].top;
|
|
while (len--) {
|
|
bytes += mbuf_Length(m);
|
|
m = m->pnext;
|
|
}
|
|
}
|
|
|
|
return bytes;
|
|
}
|
|
|
|
struct mbuf *
|
|
link_Dequeue(struct link *l)
|
|
{
|
|
int pri;
|
|
struct mbuf *bp;
|
|
|
|
for (bp = (struct mbuf *)0, pri = LINK_QUEUES - 1; pri >= 0; pri--)
|
|
if (l->Queue[pri].qlen) {
|
|
bp = mbuf_Dequeue(l->Queue + pri);
|
|
log_Printf(LogDEBUG, "link_Dequeue: Dequeued from queue %d,"
|
|
" containing %d more packets\n", pri, l->Queue[pri].qlen);
|
|
break;
|
|
}
|
|
|
|
return bp;
|
|
}
|
|
|
|
static struct protostatheader {
|
|
u_short number;
|
|
const char *name;
|
|
} ProtocolStat[NPROTOSTAT] = {
|
|
{ PROTO_IP, "IP" },
|
|
{ PROTO_VJUNCOMP, "VJ_UNCOMP" },
|
|
{ PROTO_VJCOMP, "VJ_COMP" },
|
|
{ PROTO_COMPD, "COMPD" },
|
|
{ PROTO_ICOMPD, "ICOMPD" },
|
|
{ PROTO_LCP, "LCP" },
|
|
{ PROTO_IPCP, "IPCP" },
|
|
{ PROTO_CCP, "CCP" },
|
|
{ PROTO_PAP, "PAP" },
|
|
{ PROTO_LQR, "LQR" },
|
|
{ PROTO_CHAP, "CHAP" },
|
|
{ PROTO_MP, "MULTILINK" },
|
|
{ 0, "Others" }
|
|
};
|
|
|
|
void
|
|
link_ProtocolRecord(struct link *l, u_short proto, int type)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NPROTOSTAT; i++)
|
|
if (ProtocolStat[i].number == proto)
|
|
break;
|
|
|
|
if (type == PROTO_IN)
|
|
l->proto_in[i]++;
|
|
else
|
|
l->proto_out[i]++;
|
|
}
|
|
|
|
void
|
|
link_ReportProtocolStatus(struct link *l, struct prompt *prompt)
|
|
{
|
|
int i;
|
|
|
|
prompt_Printf(prompt, " Protocol in out "
|
|
"Protocol in out\n");
|
|
for (i = 0; i < NPROTOSTAT; i++) {
|
|
prompt_Printf(prompt, " %-9s: %8lu, %8lu",
|
|
ProtocolStat[i].name, l->proto_in[i], l->proto_out[i]);
|
|
if ((i % 2) == 0)
|
|
prompt_Printf(prompt, "\n");
|
|
}
|
|
if (!(i % 2))
|
|
prompt_Printf(prompt, "\n");
|
|
}
|
|
|
|
void
|
|
link_PushPacket(struct link *l, struct mbuf *bp, struct bundle *b, int pri,
|
|
u_short proto)
|
|
{
|
|
int layer;
|
|
|
|
/*
|
|
* When we ``push'' a packet into the link, it gets processed by the
|
|
* ``push'' function in each layer starting at the top.
|
|
* We never expect the result of a ``push'' to be more than one
|
|
* packet (as we do with ``pull''s).
|
|
*/
|
|
|
|
if(pri < 0 || pri >= LINK_QUEUES)
|
|
pri = 0;
|
|
|
|
for (layer = l->nlayers; layer && bp; layer--)
|
|
if (l->layer[layer - 1]->push != NULL)
|
|
bp = (*l->layer[layer - 1]->push)(b, l, bp, pri, &proto);
|
|
|
|
if (bp) {
|
|
log_Printf(LogDEBUG, "link_PushPacket: proto = 0x%04x\n", proto);
|
|
link_AddOutOctets(l, mbuf_Length(bp));
|
|
mbuf_Enqueue(l->Queue + pri, mbuf_Contiguous(bp));
|
|
}
|
|
}
|
|
|
|
void
|
|
link_PullPacket(struct link *l, char *buf, size_t len, struct bundle *b)
|
|
{
|
|
struct mbuf *bp, *lbp[LAYER_MAX], *next;
|
|
u_short lproto[LAYER_MAX], proto;
|
|
int layer;
|
|
|
|
/*
|
|
* When we ``pull'' a packet from the link, it gets processed by the
|
|
* ``pull'' function in each layer starting at the bottom.
|
|
* Each ``pull'' may produce multiple packets, chained together using
|
|
* bp->pnext.
|
|
* Each packet that results from each pull has to be pulled through
|
|
* all of the higher layers before the next resulting packet is pulled
|
|
* through anything; this ensures that packets that depend on the
|
|
* fsm state resulting from the receipt of the previous packet aren't
|
|
* surprised.
|
|
*/
|
|
|
|
link_AddInOctets(l, len);
|
|
|
|
memset(lbp, '\0', sizeof lbp);
|
|
lbp[0] = mbuf_Alloc(len, MB_ASYNC);
|
|
memcpy(MBUF_CTOP(lbp[0]), buf, len);
|
|
lproto[0] = 0;
|
|
layer = 0;
|
|
|
|
while (layer || lbp[layer]) {
|
|
if (lbp[layer] == NULL) {
|
|
layer--;
|
|
continue;
|
|
}
|
|
bp = lbp[layer];
|
|
lbp[layer] = bp->pnext;
|
|
bp->pnext = NULL;
|
|
proto = lproto[layer];
|
|
|
|
if (l->layer[layer]->pull != NULL)
|
|
bp = (*l->layer[layer]->pull)(b, l, bp, &proto);
|
|
|
|
if (layer == l->nlayers - 1) {
|
|
/* We've just done the top layer, despatch the packet(s) */
|
|
while (bp) {
|
|
next = bp->pnext;
|
|
bp->pnext = NULL;
|
|
Despatch(b, l, bp, proto);
|
|
bp = next;
|
|
}
|
|
} else {
|
|
lbp[++layer] = bp;
|
|
lproto[layer] = proto;
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
link_Stack(struct link *l, struct layer *layer)
|
|
{
|
|
if (l->nlayers == sizeof l->layer / sizeof l->layer[0]) {
|
|
log_Printf(LogERROR, "%s: Oops, cannot stack a %s layer...\n",
|
|
l->name, layer->name);
|
|
return 0;
|
|
}
|
|
l->layer[l->nlayers++] = layer;
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
link_EmptyStack(struct link *l)
|
|
{
|
|
l->nlayers = 0;
|
|
}
|
|
|
|
static const struct {
|
|
u_short proto;
|
|
struct mbuf *(*fn)(struct bundle *, struct link *, struct mbuf *);
|
|
} despatcher[] = {
|
|
{ PROTO_IP, ip_Input },
|
|
{ PROTO_MP, mp_Input },
|
|
{ PROTO_LCP, lcp_Input },
|
|
{ PROTO_IPCP, ipcp_Input },
|
|
{ PROTO_PAP, pap_Input },
|
|
{ PROTO_CHAP, chap_Input },
|
|
{ PROTO_CCP, ccp_Input },
|
|
{ PROTO_LQR, lqr_Input },
|
|
{ PROTO_CBCP, cbcp_Input }
|
|
};
|
|
|
|
#define DSIZE (sizeof despatcher / sizeof despatcher[0])
|
|
|
|
static void
|
|
Despatch(struct bundle *bundle, struct link *l, struct mbuf *bp, u_short proto)
|
|
{
|
|
int f;
|
|
|
|
for (f = 0; f < DSIZE; f++)
|
|
if (despatcher[f].proto == proto) {
|
|
bp = (*despatcher[f].fn)(bundle, l, bp);
|
|
break;
|
|
}
|
|
|
|
if (bp) {
|
|
struct physical *p = link2physical(l);
|
|
|
|
log_Printf(LogPHASE, "%s protocol 0x%04x (%s)\n",
|
|
f == DSIZE ? "Unknown" : "Unexpected", proto,
|
|
hdlc_Protocol2Nam(proto));
|
|
bp = mbuf_Contiguous(proto_Prepend(bp, proto, 0, 0));
|
|
lcp_SendProtoRej(&l->lcp, MBUF_CTOP(bp), bp->cnt);
|
|
if (p) {
|
|
p->hdlc.lqm.SaveInDiscards++;
|
|
p->hdlc.stats.unknownproto++;
|
|
}
|
|
mbuf_Free(bp);
|
|
}
|
|
}
|