366 lines
8.8 KiB
C
366 lines
8.8 KiB
C
/*-
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* Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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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
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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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
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#include <sys/types.h>
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#include <netinet/in_systm.h>
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#include <sys/un.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <stdio.h>
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#include <string.h>
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#include <termios.h>
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#include "defs.h"
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#include "layer.h"
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#include "mbuf.h"
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#include "log.h"
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#include "timer.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "throughput.h"
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#include "proto.h"
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#include "fsm.h"
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#include "descriptor.h"
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#include "lcp.h"
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#include "ccp.h"
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#include "link.h"
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#include "prompt.h"
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#include "async.h"
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#include "physical.h"
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#include "mp.h"
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#include "iplist.h"
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#include "slcompress.h"
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#include "ipcp.h"
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#include "ip.h"
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#include "auth.h"
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#include "pap.h"
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#include "chap.h"
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#include "cbcp.h"
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#include "command.h"
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static void Despatch(struct bundle *, struct link *, struct mbuf *, u_short);
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void
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link_AddInOctets(struct link *l, int n)
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{
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throughput_addin(&l->throughput, n);
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}
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void
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link_AddOutOctets(struct link *l, int n)
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{
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throughput_addout(&l->throughput, n);
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}
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void
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link_SequenceQueue(struct link *l)
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{
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struct mqueue *queue, *highest;
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log_Printf(LogDEBUG, "link_SequenceQueue\n");
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highest = LINK_HIGHQ(l);
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for (queue = l->Queue; queue < highest; queue++)
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while (queue->len)
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m_enqueue(highest, m_dequeue(queue));
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}
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void
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link_DeleteQueue(struct link *l)
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{
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struct mqueue *queue, *highest;
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highest = LINK_HIGHQ(l);
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for (queue = l->Queue; queue <= highest; queue++)
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while (queue->top)
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m_freem(m_dequeue(queue));
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}
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size_t
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link_QueueLen(struct link *l)
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{
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int i;
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size_t len;
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for (i = 0, len = 0; i < LINK_QUEUES(l); i++)
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len += l->Queue[i].len;
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return len;
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}
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size_t
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link_QueueBytes(struct link *l)
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{
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int i;
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size_t len, bytes;
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struct mbuf *m;
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bytes = 0;
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for (i = 0, len = 0; i < LINK_QUEUES(l); i++) {
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len = l->Queue[i].len;
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m = l->Queue[i].top;
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while (len--) {
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bytes += m_length(m);
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m = m->m_nextpkt;
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}
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}
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return bytes;
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}
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struct mbuf *
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link_Dequeue(struct link *l)
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{
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int pri;
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struct mbuf *bp;
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for (bp = NULL, pri = LINK_QUEUES(l) - 1; pri >= 0; pri--)
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if (l->Queue[pri].len) {
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bp = m_dequeue(l->Queue + pri);
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log_Printf(LogDEBUG, "link_Dequeue: Dequeued from queue %d,"
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" containing %lu more packets\n", pri,
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(u_long)l->Queue[pri].len);
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break;
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}
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return bp;
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}
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static struct protostatheader {
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u_short number;
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const char *name;
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} ProtocolStat[NPROTOSTAT] = {
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{ PROTO_IP, "IP" },
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{ PROTO_VJUNCOMP, "VJ_UNCOMP" },
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{ PROTO_VJCOMP, "VJ_COMP" },
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{ PROTO_COMPD, "COMPD" },
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{ PROTO_ICOMPD, "ICOMPD" },
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{ PROTO_LCP, "LCP" },
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{ PROTO_IPCP, "IPCP" },
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{ PROTO_CCP, "CCP" },
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{ PROTO_PAP, "PAP" },
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{ PROTO_LQR, "LQR" },
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{ PROTO_CHAP, "CHAP" },
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{ PROTO_MP, "MULTILINK" },
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{ 0, "Others" }
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};
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void
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link_ProtocolRecord(struct link *l, u_short proto, int type)
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{
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int i;
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for (i = 0; i < NPROTOSTAT; i++)
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if (ProtocolStat[i].number == proto)
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break;
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if (type == PROTO_IN)
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l->proto_in[i]++;
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else
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l->proto_out[i]++;
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}
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void
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link_ReportProtocolStatus(struct link *l, struct prompt *prompt)
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{
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int i;
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prompt_Printf(prompt, " Protocol in out "
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"Protocol in out\n");
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for (i = 0; i < NPROTOSTAT; i++) {
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prompt_Printf(prompt, " %-9s: %8lu, %8lu",
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ProtocolStat[i].name, l->proto_in[i], l->proto_out[i]);
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if ((i % 2) == 0)
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prompt_Printf(prompt, "\n");
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}
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if (!(i % 2))
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prompt_Printf(prompt, "\n");
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}
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void
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link_PushPacket(struct link *l, struct mbuf *bp, struct bundle *b, int pri,
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u_short proto)
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{
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int layer;
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/*
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* When we ``push'' a packet into the link, it gets processed by the
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* ``push'' function in each layer starting at the top.
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* We never expect the result of a ``push'' to be more than one
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* packet (as we do with ``pull''s).
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*/
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if(pri < 0 || pri >= LINK_QUEUES(l))
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pri = 0;
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for (layer = l->nlayers; layer && bp; layer--)
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if (l->layer[layer - 1]->push != NULL)
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bp = (*l->layer[layer - 1]->push)(b, l, bp, pri, &proto);
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if (bp) {
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link_AddOutOctets(l, m_length(bp));
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log_Printf(LogDEBUG, "link_PushPacket: Transmit proto 0x%04x\n", proto);
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m_enqueue(l->Queue + pri, m_pullup(bp));
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}
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}
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void
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link_PullPacket(struct link *l, char *buf, size_t len, struct bundle *b)
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{
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struct mbuf *bp, *lbp[LAYER_MAX], *next;
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u_short lproto[LAYER_MAX], proto;
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int layer;
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/*
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* When we ``pull'' a packet from the link, it gets processed by the
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* ``pull'' function in each layer starting at the bottom.
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* Each ``pull'' may produce multiple packets, chained together using
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* bp->m_nextpkt.
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* Each packet that results from each pull has to be pulled through
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* all of the higher layers before the next resulting packet is pulled
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* through anything; this ensures that packets that depend on the
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* fsm state resulting from the receipt of the previous packet aren't
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* surprised.
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*/
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link_AddInOctets(l, len);
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memset(lbp, '\0', sizeof lbp);
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lbp[0] = m_get(len, MB_UNKNOWN);
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memcpy(MBUF_CTOP(lbp[0]), buf, len);
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lproto[0] = 0;
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layer = 0;
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while (layer || lbp[layer]) {
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if (lbp[layer] == NULL) {
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layer--;
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continue;
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}
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bp = lbp[layer];
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lbp[layer] = bp->m_nextpkt;
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bp->m_nextpkt = NULL;
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proto = lproto[layer];
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if (l->layer[layer]->pull != NULL)
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bp = (*l->layer[layer]->pull)(b, l, bp, &proto);
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if (layer == l->nlayers - 1) {
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/* We've just done the top layer, despatch the packet(s) */
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while (bp) {
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next = bp->m_nextpkt;
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bp->m_nextpkt = NULL;
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log_Printf(LogDEBUG, "link_PullPacket: Despatch proto 0x%04x\n", proto);
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Despatch(b, l, bp, proto);
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bp = next;
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}
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} else {
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lbp[++layer] = bp;
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lproto[layer] = proto;
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}
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}
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}
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int
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link_Stack(struct link *l, struct layer *layer)
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{
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if (l->nlayers == sizeof l->layer / sizeof l->layer[0]) {
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log_Printf(LogERROR, "%s: Oops, cannot stack a %s layer...\n",
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l->name, layer->name);
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return 0;
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}
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l->layer[l->nlayers++] = layer;
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return 1;
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}
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void
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link_EmptyStack(struct link *l)
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{
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l->nlayers = 0;
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}
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static const struct {
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u_short proto;
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struct mbuf *(*fn)(struct bundle *, struct link *, struct mbuf *);
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} despatcher[] = {
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{ PROTO_IP, ip_Input },
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{ PROTO_MP, mp_Input },
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{ PROTO_LCP, lcp_Input },
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{ PROTO_IPCP, ipcp_Input },
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{ PROTO_PAP, pap_Input },
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{ PROTO_CHAP, chap_Input },
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{ PROTO_CCP, ccp_Input },
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{ PROTO_LQR, lqr_Input },
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{ PROTO_CBCP, cbcp_Input }
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};
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#define DSIZE (sizeof despatcher / sizeof despatcher[0])
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static void
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Despatch(struct bundle *bundle, struct link *l, struct mbuf *bp, u_short proto)
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{
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int f;
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for (f = 0; f < DSIZE; f++)
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if (despatcher[f].proto == proto) {
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bp = (*despatcher[f].fn)(bundle, l, bp);
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break;
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}
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if (bp) {
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struct physical *p = link2physical(l);
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log_Printf(LogPHASE, "%s protocol 0x%04x (%s)\n",
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f == DSIZE ? "Unknown" : "Unexpected", proto,
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hdlc_Protocol2Nam(proto));
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bp = m_pullup(proto_Prepend(bp, proto, 0, 0));
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lcp_SendProtoRej(&l->lcp, MBUF_CTOP(bp), bp->m_len);
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if (p) {
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p->hdlc.lqm.SaveInDiscards++;
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p->hdlc.stats.unknownproto++;
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}
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m_freem(bp);
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}
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}
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int
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link_ShowLayers(struct cmdargs const *arg)
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{
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struct link *l = command_ChooseLink(arg);
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int layer;
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for (layer = l->nlayers; layer; layer--)
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prompt_Printf(arg->prompt, "%s%s", layer == l->nlayers ? "" : ", ",
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l->layer[layer - 1]->name);
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if (l->nlayers)
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prompt_Printf(arg->prompt, "\n");
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return 0;
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}
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