The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
1212 lines
34 KiB
C
1212 lines
34 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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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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#include <sys/param.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <arpa/inet.h>
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#include <net/if_dl.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <errno.h>
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#include <paths.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <termios.h>
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#include <unistd.h>
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#include "layer.h"
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#ifndef NONAT
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#include "nat_cmd.h"
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#endif
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#include "vjcomp.h"
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#include "ua.h"
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#include "defs.h"
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#include "command.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 "fsm.h"
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#include "iplist.h"
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#include "throughput.h"
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#include "slcompress.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "ncpaddr.h"
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#include "ipcp.h"
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#include "auth.h"
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#include "lcp.h"
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#include "async.h"
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#include "ccp.h"
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#include "link.h"
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#include "descriptor.h"
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#include "physical.h"
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#include "chat.h"
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#include "proto.h"
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#include "filter.h"
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#include "mp.h"
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#include "chap.h"
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#include "cbcp.h"
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#include "datalink.h"
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#ifndef NORADIUS
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#include "radius.h"
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#endif
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#include "ipv6cp.h"
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#include "ncp.h"
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#include "bundle.h"
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#include "prompt.h"
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#include "id.h"
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#include "arp.h"
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void
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peerid_Init(struct peerid *peer)
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{
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peer->enddisc.class = 0;
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*peer->enddisc.address = '\0';
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peer->enddisc.len = 0;
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*peer->authname = '\0';
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}
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int
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peerid_Equal(const struct peerid *p1, const struct peerid *p2)
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{
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return !strcmp(p1->authname, p2->authname) &&
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p1->enddisc.class == p2->enddisc.class &&
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p1->enddisc.len == p2->enddisc.len &&
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!memcmp(p1->enddisc.address, p2->enddisc.address, p1->enddisc.len);
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}
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static u_int32_t
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inc_seq(unsigned is12bit, u_int32_t seq)
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{
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seq++;
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if (is12bit) {
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if (seq & 0xfffff000)
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seq = 0;
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} else if (seq & 0xff000000)
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seq = 0;
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return seq;
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}
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static int
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isbefore(unsigned is12bit, u_int32_t seq1, u_int32_t seq2)
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{
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u_int32_t max = (is12bit ? 0xfff : 0xffffff) - 0x200;
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if (seq1 > max) {
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if (seq2 < 0x200 || seq2 > seq1)
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return 1;
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} else if ((seq1 > 0x200 || seq2 <= max) && seq1 < seq2)
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return 1;
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return 0;
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}
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static int
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mp_ReadHeader(struct mp *mp, struct mbuf *m, struct mp_header *header)
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{
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if (mp->local_is12bit) {
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u_int16_t val;
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ua_ntohs(MBUF_CTOP(m), &val);
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if (val & 0x3000) {
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log_Printf(LogWARN, "Oops - MP header without required zero bits\n");
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return 0;
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}
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header->begin = val & 0x8000 ? 1 : 0;
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header->end = val & 0x4000 ? 1 : 0;
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header->seq = val & 0x0fff;
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return 2;
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} else {
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ua_ntohl(MBUF_CTOP(m), &header->seq);
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if (header->seq & 0x3f000000) {
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log_Printf(LogWARN, "Oops - MP header without required zero bits\n");
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return 0;
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}
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header->begin = header->seq & 0x80000000 ? 1 : 0;
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header->end = header->seq & 0x40000000 ? 1 : 0;
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header->seq &= 0x00ffffff;
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return 4;
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}
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}
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static void
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mp_LayerStart(void *v __unused, struct fsm *fp __unused)
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{
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/* The given FSM (ccp) is about to start up ! */
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}
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static void
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mp_LayerUp(void *v __unused, struct fsm *fp)
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{
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/* The given fsm (ccp) is now up */
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bundle_CalculateBandwidth(fp->bundle); /* Against ccp_MTUOverhead */
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}
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static void
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mp_LayerDown(void *v __unused, struct fsm *fp __unused)
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{
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/* The given FSM (ccp) has been told to come down */
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}
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static void
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mp_LayerFinish(void *v __unused, struct fsm *fp)
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{
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/* The given fsm (ccp) is now down */
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if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE)
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fsm_Open(fp); /* CCP goes to ST_STOPPED */
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}
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static void
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mp_UpDown(void *v)
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{
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struct mp *mp = (struct mp *)v;
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int percent;
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percent = MAX(mp->link.stats.total.in.OctetsPerSecond,
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mp->link.stats.total.out.OctetsPerSecond) * 800 /
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mp->bundle->bandwidth;
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if (percent >= mp->cfg.autoload.max) {
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log_Printf(LogDEBUG, "%d%% saturation - bring a link up ?\n", percent);
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bundle_AutoAdjust(mp->bundle, percent, AUTO_UP);
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} else if (percent <= mp->cfg.autoload.min) {
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log_Printf(LogDEBUG, "%d%% saturation - bring a link down ?\n", percent);
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bundle_AutoAdjust(mp->bundle, percent, AUTO_DOWN);
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}
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}
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void
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mp_StopAutoloadTimer(struct mp *mp)
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{
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throughput_stop(&mp->link.stats.total);
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}
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void
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mp_CheckAutoloadTimer(struct mp *mp)
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{
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if (mp->link.stats.total.SamplePeriod != mp->cfg.autoload.period) {
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throughput_destroy(&mp->link.stats.total);
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throughput_init(&mp->link.stats.total, mp->cfg.autoload.period);
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throughput_callback(&mp->link.stats.total, mp_UpDown, mp);
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}
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if (bundle_WantAutoloadTimer(mp->bundle))
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throughput_start(&mp->link.stats.total, "MP throughput", 1);
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else
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mp_StopAutoloadTimer(mp);
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}
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void
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mp_RestartAutoloadTimer(struct mp *mp)
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{
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if (mp->link.stats.total.SamplePeriod != mp->cfg.autoload.period)
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mp_CheckAutoloadTimer(mp);
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else
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throughput_clear(&mp->link.stats.total, THROUGHPUT_OVERALL, NULL);
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}
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void
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mp_Init(struct mp *mp, struct bundle *bundle)
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{
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mp->peer_is12bit = mp->local_is12bit = 0;
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mp->peer_mrru = mp->local_mrru = 0;
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peerid_Init(&mp->peer);
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mp->out.seq = 0;
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mp->out.link = 0;
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mp->out.af = AF_INET;
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mp->seq.min_in = 0;
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mp->seq.next_in = 0;
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mp->inbufs = NULL;
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mp->bundle = bundle;
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mp->link.type = LOGICAL_LINK;
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mp->link.name = "mp";
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mp->link.len = sizeof *mp;
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mp->cfg.autoload.period = SAMPLE_PERIOD;
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mp->cfg.autoload.min = mp->cfg.autoload.max = 0;
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throughput_init(&mp->link.stats.total, mp->cfg.autoload.period);
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throughput_callback(&mp->link.stats.total, mp_UpDown, mp);
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mp->link.stats.parent = NULL;
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mp->link.stats.gather = 0; /* Let the physical links gather stats */
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memset(mp->link.Queue, '\0', sizeof mp->link.Queue);
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memset(mp->link.proto_in, '\0', sizeof mp->link.proto_in);
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memset(mp->link.proto_out, '\0', sizeof mp->link.proto_out);
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mp->fsmp.LayerStart = mp_LayerStart;
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mp->fsmp.LayerUp = mp_LayerUp;
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mp->fsmp.LayerDown = mp_LayerDown;
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mp->fsmp.LayerFinish = mp_LayerFinish;
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mp->fsmp.object = mp;
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mpserver_Init(&mp->server);
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mp->cfg.mrru = 0;
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mp->cfg.shortseq = NEG_ENABLED|NEG_ACCEPTED;
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mp->cfg.negenddisc = NEG_ENABLED|NEG_ACCEPTED;
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mp->cfg.enddisc.class = 0;
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*mp->cfg.enddisc.address = '\0';
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mp->cfg.enddisc.len = 0;
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lcp_Init(&mp->link.lcp, mp->bundle, &mp->link, NULL);
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ccp_Init(&mp->link.ccp, mp->bundle, &mp->link, &mp->fsmp);
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link_EmptyStack(&mp->link);
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link_Stack(&mp->link, &protolayer);
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link_Stack(&mp->link, &ccplayer);
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link_Stack(&mp->link, &vjlayer);
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#ifndef NONAT
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link_Stack(&mp->link, &natlayer);
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#endif
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}
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int
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mp_Up(struct mp *mp, struct datalink *dl)
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{
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struct lcp *lcp = &dl->physical->link.lcp;
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if (mp->active) {
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/* We're adding a link - do a last validation on our parameters */
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if (!peerid_Equal(&dl->peer, &mp->peer)) {
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log_Printf(LogPHASE, "%s: Inappropriate peer !\n", dl->name);
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log_Printf(LogPHASE, " Attached to peer %s/%s\n", mp->peer.authname,
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mp_Enddisc(mp->peer.enddisc.class, mp->peer.enddisc.address,
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mp->peer.enddisc.len));
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log_Printf(LogPHASE, " New link is peer %s/%s\n", dl->peer.authname,
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mp_Enddisc(dl->peer.enddisc.class, dl->peer.enddisc.address,
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dl->peer.enddisc.len));
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return MP_FAILED;
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}
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if (mp->local_mrru != lcp->want_mrru ||
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mp->peer_mrru != lcp->his_mrru ||
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mp->local_is12bit != lcp->want_shortseq ||
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mp->peer_is12bit != lcp->his_shortseq) {
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log_Printf(LogPHASE, "%s: Invalid MRRU/SHORTSEQ MP parameters !\n",
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dl->name);
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return MP_FAILED;
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}
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return MP_ADDED;
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} else {
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/* First link in multilink mode */
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mp->local_mrru = lcp->want_mrru;
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mp->peer_mrru = lcp->his_mrru;
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mp->local_is12bit = lcp->want_shortseq;
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mp->peer_is12bit = lcp->his_shortseq;
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mp->peer = dl->peer;
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throughput_destroy(&mp->link.stats.total);
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throughput_init(&mp->link.stats.total, mp->cfg.autoload.period);
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throughput_callback(&mp->link.stats.total, mp_UpDown, mp);
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memset(mp->link.Queue, '\0', sizeof mp->link.Queue);
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memset(mp->link.proto_in, '\0', sizeof mp->link.proto_in);
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memset(mp->link.proto_out, '\0', sizeof mp->link.proto_out);
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/* Tell the link who it belongs to */
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dl->physical->link.stats.parent = &mp->link.stats.total;
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mp->out.seq = 0;
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mp->out.link = 0;
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mp->out.af = AF_INET;
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mp->seq.min_in = 0;
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mp->seq.next_in = 0;
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/*
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* Now we create our server socket.
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* If it already exists, join it. Otherwise, create and own it
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*/
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switch (mpserver_Open(&mp->server, &mp->peer)) {
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case MPSERVER_CONNECTED:
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log_Printf(LogPHASE, "mp: Transfer link on %s\n",
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mp->server.socket.sun_path);
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mp->server.send.dl = dl; /* Defer 'till it's safe to send */
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return MP_LINKSENT;
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case MPSERVER_FAILED:
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return MP_FAILED;
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case MPSERVER_LISTENING:
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log_Printf(LogPHASE, "mp: Listening on %s\n", mp->server.socket.sun_path);
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log_Printf(LogPHASE, " First link: %s\n", dl->name);
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/* Re-point our NCP layers at our MP link */
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ncp_SetLink(&mp->bundle->ncp, &mp->link);
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/* Our lcp's already up 'cos of the NULL parent */
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if (ccp_SetOpenMode(&mp->link.ccp)) {
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fsm_Up(&mp->link.ccp.fsm);
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fsm_Open(&mp->link.ccp.fsm);
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}
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mp->active = 1;
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break;
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}
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}
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return MP_UP;
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}
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void
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mp_Down(struct mp *mp)
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{
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if (mp->active) {
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struct mbuf *next;
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/* Stop that ! */
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mp_StopAutoloadTimer(mp);
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/* Don't want any more of these */
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mpserver_Close(&mp->server);
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/* CCP goes down with a bang */
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fsm2initial(&mp->link.ccp.fsm);
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/* Received fragments go in the bit-bucket */
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while (mp->inbufs) {
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next = mp->inbufs->m_nextpkt;
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m_freem(mp->inbufs);
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mp->inbufs = next;
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}
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peerid_Init(&mp->peer);
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mp->active = 0;
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}
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}
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void
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mp_linkInit(struct mp_link *mplink)
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{
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mplink->seq = 0;
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mplink->bandwidth = 0;
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}
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static void
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mp_Assemble(struct mp *mp, struct mbuf *m, struct physical *p)
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{
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struct mp_header mh, h;
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struct mbuf *q, *last;
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u_int32_t seq;
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/*
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* When `m' and `p' are NULL, it means our oldest link has gone down.
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* We want to determine a new min, and process any intermediate stuff
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* as normal
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*/
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if (m && mp_ReadHeader(mp, m, &mh) == 0) {
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m_freem(m);
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return;
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}
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if (p) {
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seq = p->dl->mp.seq;
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p->dl->mp.seq = mh.seq;
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} else
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seq = mp->seq.min_in;
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if (mp->seq.min_in == seq) {
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/*
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* We've received new data on the link that has our min (oldest) seq.
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* Figure out which link now has the smallest (oldest) seq.
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*/
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struct datalink *dl;
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mp->seq.min_in = (u_int32_t)-1;
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for (dl = mp->bundle->links; dl; dl = dl->next)
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if (dl->state == DATALINK_OPEN &&
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(mp->seq.min_in == (u_int32_t)-1 ||
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isbefore(mp->local_is12bit, dl->mp.seq, mp->seq.min_in)))
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mp->seq.min_in = dl->mp.seq;
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}
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/*
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* Now process as many of our fragments as we can, adding our new
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* fragment in as we go, and ordering with the oldest at the top of
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* the queue.
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*/
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last = NULL;
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seq = mp->seq.next_in;
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q = mp->inbufs;
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while (q || m) {
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if (!q) {
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if (last)
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last->m_nextpkt = m;
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else
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mp->inbufs = m;
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q = m;
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m = NULL;
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h = mh;
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} else {
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mp_ReadHeader(mp, q, &h);
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if (m && isbefore(mp->local_is12bit, mh.seq, h.seq)) {
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/* Our received fragment fits in before this one, so link it in */
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if (last)
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last->m_nextpkt = m;
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else
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mp->inbufs = m;
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m->m_nextpkt = q;
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q = m;
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h = mh;
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m = NULL;
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}
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}
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if (h.seq != seq) {
|
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/* we're missing something :-( */
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if (isbefore(mp->local_is12bit, seq, mp->seq.min_in)) {
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/* we're never gonna get it */
|
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struct mbuf *next;
|
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|
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/* Zap all older fragments */
|
|
while (mp->inbufs != q) {
|
|
log_Printf(LogDEBUG, "Drop frag\n");
|
|
next = mp->inbufs->m_nextpkt;
|
|
m_freem(mp->inbufs);
|
|
mp->inbufs = next;
|
|
}
|
|
|
|
/*
|
|
* Zap everything until the next `end' fragment OR just before
|
|
* the next `begin' fragment OR 'till seq.min_in - whichever
|
|
* comes first.
|
|
*/
|
|
do {
|
|
mp_ReadHeader(mp, mp->inbufs, &h);
|
|
if (h.begin) {
|
|
/* We might be able to process this ! */
|
|
h.seq--; /* We're gonna look for fragment with h.seq+1 */
|
|
break;
|
|
}
|
|
next = mp->inbufs->m_nextpkt;
|
|
log_Printf(LogDEBUG, "Drop frag %u\n", h.seq);
|
|
m_freem(mp->inbufs);
|
|
mp->inbufs = next;
|
|
} while (mp->inbufs && (isbefore(mp->local_is12bit, mp->seq.min_in,
|
|
h.seq) || h.end));
|
|
|
|
/*
|
|
* Continue processing things from here.
|
|
* This deals with the possibility that we received a fragment
|
|
* on the slowest link that invalidates some of our data (because
|
|
* of the hole at `q'), but where there are subsequent `whole'
|
|
* packets that have already been received.
|
|
*/
|
|
|
|
mp->seq.next_in = seq = inc_seq(mp->local_is12bit, h.seq);
|
|
last = NULL;
|
|
q = mp->inbufs;
|
|
} else
|
|
/* we may still receive the missing fragment */
|
|
break;
|
|
} else if (h.end) {
|
|
/* We've got something, reassemble */
|
|
struct mbuf **frag = &q;
|
|
int len;
|
|
long long first = -1;
|
|
|
|
do {
|
|
*frag = mp->inbufs;
|
|
mp->inbufs = mp->inbufs->m_nextpkt;
|
|
len = mp_ReadHeader(mp, *frag, &h);
|
|
if (first == -1)
|
|
first = h.seq;
|
|
if (frag == &q && !h.begin) {
|
|
log_Printf(LogWARN, "Oops - MP frag %lu should have a begin flag\n",
|
|
(u_long)h.seq);
|
|
m_freem(q);
|
|
q = NULL;
|
|
} else if (frag != &q && h.begin) {
|
|
log_Printf(LogWARN, "Oops - MP frag %lu should have an end flag\n",
|
|
(u_long)h.seq - 1);
|
|
/*
|
|
* Stuff our fragment back at the front of the queue and zap
|
|
* our half-assembled packet.
|
|
*/
|
|
(*frag)->m_nextpkt = mp->inbufs;
|
|
mp->inbufs = *frag;
|
|
*frag = NULL;
|
|
m_freem(q);
|
|
q = NULL;
|
|
frag = &q;
|
|
h.end = 0; /* just in case it's a whole packet */
|
|
} else {
|
|
(*frag)->m_offset += len;
|
|
(*frag)->m_len -= len;
|
|
(*frag)->m_nextpkt = NULL;
|
|
do
|
|
frag = &(*frag)->m_next;
|
|
while (*frag != NULL);
|
|
}
|
|
} while (!h.end);
|
|
|
|
if (q) {
|
|
q = m_pullup(q);
|
|
log_Printf(LogDEBUG, "MP: Reassembled frags %lu-%lu, length %zd\n",
|
|
(u_long)first, (u_long)h.seq, m_length(q));
|
|
link_PullPacket(&mp->link, MBUF_CTOP(q), q->m_len, mp->bundle);
|
|
m_freem(q);
|
|
}
|
|
|
|
mp->seq.next_in = seq = inc_seq(mp->local_is12bit, h.seq);
|
|
last = NULL;
|
|
q = mp->inbufs;
|
|
} else {
|
|
/* Look for the next fragment */
|
|
seq = inc_seq(mp->local_is12bit, seq);
|
|
last = q;
|
|
q = q->m_nextpkt;
|
|
}
|
|
}
|
|
|
|
if (m) {
|
|
/* We still have to find a home for our new fragment */
|
|
last = NULL;
|
|
for (q = mp->inbufs; q; last = q, q = q->m_nextpkt) {
|
|
mp_ReadHeader(mp, q, &h);
|
|
if (isbefore(mp->local_is12bit, mh.seq, h.seq))
|
|
break;
|
|
}
|
|
/* Our received fragment fits in here */
|
|
if (last)
|
|
last->m_nextpkt = m;
|
|
else
|
|
mp->inbufs = m;
|
|
m->m_nextpkt = q;
|
|
}
|
|
}
|
|
|
|
struct mbuf *
|
|
mp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
|
|
{
|
|
struct physical *p = link2physical(l);
|
|
|
|
if (!bundle->ncp.mp.active)
|
|
/* Let someone else deal with it ! */
|
|
return bp;
|
|
|
|
if (p == NULL) {
|
|
log_Printf(LogWARN, "DecodePacket: Can't do MP inside MP !\n");
|
|
m_freem(bp);
|
|
} else {
|
|
m_settype(bp, MB_MPIN);
|
|
mp_Assemble(&bundle->ncp.mp, bp, p);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
mp_Output(struct mp *mp, struct bundle *bundle, struct link *l,
|
|
struct mbuf *m, u_int32_t begin, u_int32_t end)
|
|
{
|
|
char prepend[4];
|
|
|
|
/* Stuff an MP header on the front of our packet and send it */
|
|
|
|
if (mp->peer_is12bit) {
|
|
u_int16_t val;
|
|
|
|
val = (begin << 15) | (end << 14) | (u_int16_t)mp->out.seq;
|
|
ua_htons(&val, prepend);
|
|
m = m_prepend(m, prepend, 2, 0);
|
|
} else {
|
|
u_int32_t val;
|
|
|
|
val = (begin << 31) | (end << 30) | (u_int32_t)mp->out.seq;
|
|
ua_htonl(&val, prepend);
|
|
m = m_prepend(m, prepend, 4, 0);
|
|
}
|
|
if (log_IsKept(LogDEBUG))
|
|
log_Printf(LogDEBUG, "MP[frag %d]: Send %zd bytes on link `%s'\n",
|
|
mp->out.seq, m_length(m), l->name);
|
|
mp->out.seq = inc_seq(mp->peer_is12bit, mp->out.seq);
|
|
|
|
if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) {
|
|
log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name);
|
|
return;
|
|
}
|
|
|
|
link_PushPacket(l, m, bundle, LINK_QUEUES(l) - 1, PROTO_MP);
|
|
}
|
|
|
|
int
|
|
mp_FillPhysicalQueues(struct bundle *bundle)
|
|
{
|
|
struct mp *mp = &bundle->ncp.mp;
|
|
struct datalink *dl, *fdl;
|
|
size_t total, add, len;
|
|
int thislink, nlinks, nopenlinks, sendasip;
|
|
u_int32_t begin, end;
|
|
struct mbuf *m, *mo;
|
|
struct link *bestlink;
|
|
|
|
thislink = nlinks = nopenlinks = 0;
|
|
for (fdl = NULL, dl = bundle->links; dl; dl = dl->next) {
|
|
/* Include non-open links here as mp->out.link will stay more correct */
|
|
if (!fdl) {
|
|
if (thislink == mp->out.link)
|
|
fdl = dl;
|
|
else
|
|
thislink++;
|
|
}
|
|
nlinks++;
|
|
if (dl->state == DATALINK_OPEN)
|
|
nopenlinks++;
|
|
}
|
|
|
|
if (!fdl) {
|
|
fdl = bundle->links;
|
|
if (!fdl)
|
|
return 0;
|
|
thislink = 0;
|
|
}
|
|
|
|
total = 0;
|
|
for (dl = fdl; nlinks > 0; dl = dl->next, nlinks--, thislink++) {
|
|
if (!dl) {
|
|
dl = bundle->links;
|
|
thislink = 0;
|
|
}
|
|
|
|
if (dl->state != DATALINK_OPEN)
|
|
continue;
|
|
|
|
if (dl->physical->out)
|
|
/* this link has suffered a short write. Let it continue */
|
|
continue;
|
|
|
|
add = link_QueueLen(&dl->physical->link);
|
|
if (add) {
|
|
/* this link has got stuff already queued. Let it continue */
|
|
total += add;
|
|
continue;
|
|
}
|
|
|
|
if (!mp_QueueLen(mp)) {
|
|
int mrutoosmall;
|
|
|
|
/*
|
|
* If there's only a single open link in our bundle and we haven't got
|
|
* MP level link compression, queue outbound traffic directly via that
|
|
* link's protocol stack rather than using the MP link. This results
|
|
* in the outbound traffic going out as PROTO_IP or PROTO_IPV6 rather
|
|
* than PROTO_MP.
|
|
*/
|
|
|
|
mrutoosmall = 0;
|
|
sendasip = nopenlinks < 2;
|
|
if (sendasip) {
|
|
if (dl->physical->link.lcp.his_mru < mp->peer_mrru) {
|
|
/*
|
|
* Actually, forget it. This test is done against the MRRU rather
|
|
* than the packet size so that we don't end up sending some data
|
|
* in MP fragments and some data in PROTO_IP packets. That's just
|
|
* too likely to upset some ppp implementations.
|
|
*/
|
|
mrutoosmall = 1;
|
|
sendasip = 0;
|
|
}
|
|
}
|
|
|
|
bestlink = sendasip ? &dl->physical->link : &mp->link;
|
|
if (!ncp_PushPacket(&bundle->ncp, &mp->out.af, bestlink))
|
|
break; /* Nothing else to send */
|
|
|
|
if (mrutoosmall)
|
|
log_Printf(LogDEBUG, "Don't send data as PROTO_IP, MRU < MRRU\n");
|
|
else if (sendasip)
|
|
log_Printf(LogDEBUG, "Sending data as PROTO_IP, not PROTO_MP\n");
|
|
|
|
if (sendasip) {
|
|
add = link_QueueLen(&dl->physical->link);
|
|
if (add) {
|
|
/* this link has got stuff already queued. Let it continue */
|
|
total += add;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
m = link_Dequeue(&mp->link);
|
|
if (m) {
|
|
len = m_length(m);
|
|
begin = 1;
|
|
end = 0;
|
|
|
|
while (!end) {
|
|
if (dl->state == DATALINK_OPEN) {
|
|
/* Write at most his_mru bytes to the physical link */
|
|
if (len <= dl->physical->link.lcp.his_mru) {
|
|
mo = m;
|
|
end = 1;
|
|
m_settype(mo, MB_MPOUT);
|
|
} else {
|
|
/* It's > his_mru, chop the packet (`m') into bits */
|
|
mo = m_get(dl->physical->link.lcp.his_mru, MB_MPOUT);
|
|
len -= mo->m_len;
|
|
m = mbuf_Read(m, MBUF_CTOP(mo), mo->m_len);
|
|
}
|
|
mp_Output(mp, bundle, &dl->physical->link, mo, begin, end);
|
|
begin = 0;
|
|
}
|
|
|
|
if (!end) {
|
|
nlinks--;
|
|
dl = dl->next;
|
|
if (!dl) {
|
|
dl = bundle->links;
|
|
thislink = 0;
|
|
} else
|
|
thislink++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
mp->out.link = thislink; /* Start here next time */
|
|
|
|
return total;
|
|
}
|
|
|
|
int
|
|
mp_SetDatalinkBandwidth(struct cmdargs const *arg)
|
|
{
|
|
int val;
|
|
|
|
if (arg->argc != arg->argn+1)
|
|
return -1;
|
|
|
|
val = atoi(arg->argv[arg->argn]);
|
|
if (val <= 0) {
|
|
log_Printf(LogWARN, "The link bandwidth must be greater than zero\n");
|
|
return 1;
|
|
}
|
|
arg->cx->mp.bandwidth = val;
|
|
|
|
if (arg->cx->state == DATALINK_OPEN)
|
|
bundle_CalculateBandwidth(arg->bundle);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
mp_ShowStatus(struct cmdargs const *arg)
|
|
{
|
|
struct mp *mp = &arg->bundle->ncp.mp;
|
|
|
|
prompt_Printf(arg->prompt, "Multilink is %sactive\n", mp->active ? "" : "in");
|
|
if (mp->active) {
|
|
struct mbuf *m, *lm;
|
|
int bufs = 0;
|
|
|
|
lm = NULL;
|
|
prompt_Printf(arg->prompt, "Socket: %s\n",
|
|
mp->server.socket.sun_path);
|
|
for (m = mp->inbufs; m; m = m->m_nextpkt) {
|
|
bufs++;
|
|
lm = m;
|
|
}
|
|
prompt_Printf(arg->prompt, "Pending frags: %d", bufs);
|
|
if (bufs) {
|
|
struct mp_header mh;
|
|
unsigned long first, last;
|
|
|
|
first = mp_ReadHeader(mp, mp->inbufs, &mh) ? mh.seq : 0;
|
|
last = mp_ReadHeader(mp, lm, &mh) ? mh.seq : 0;
|
|
prompt_Printf(arg->prompt, " (Have %lu - %lu, want %lu, lowest %lu)\n",
|
|
first, last, (unsigned long)mp->seq.next_in,
|
|
(unsigned long)mp->seq.min_in);
|
|
prompt_Printf(arg->prompt, " First has %sbegin bit and "
|
|
"%send bit", mh.begin ? "" : "no ", mh.end ? "" : "no ");
|
|
}
|
|
prompt_Printf(arg->prompt, "\n");
|
|
}
|
|
|
|
prompt_Printf(arg->prompt, "\nMy Side:\n");
|
|
if (mp->active) {
|
|
prompt_Printf(arg->prompt, " Output SEQ: %u\n", mp->out.seq);
|
|
prompt_Printf(arg->prompt, " MRRU: %u\n", mp->local_mrru);
|
|
prompt_Printf(arg->prompt, " Short Seq: %s\n",
|
|
mp->local_is12bit ? "on" : "off");
|
|
}
|
|
prompt_Printf(arg->prompt, " Discriminator: %s\n",
|
|
mp_Enddisc(mp->cfg.enddisc.class, mp->cfg.enddisc.address,
|
|
mp->cfg.enddisc.len));
|
|
|
|
prompt_Printf(arg->prompt, "\nHis Side:\n");
|
|
if (mp->active) {
|
|
prompt_Printf(arg->prompt, " Auth Name: %s\n", mp->peer.authname);
|
|
prompt_Printf(arg->prompt, " Input SEQ: %u\n", mp->seq.next_in);
|
|
prompt_Printf(arg->prompt, " MRRU: %u\n", mp->peer_mrru);
|
|
prompt_Printf(arg->prompt, " Short Seq: %s\n",
|
|
mp->peer_is12bit ? "on" : "off");
|
|
}
|
|
prompt_Printf(arg->prompt, " Discriminator: %s\n",
|
|
mp_Enddisc(mp->peer.enddisc.class, mp->peer.enddisc.address,
|
|
mp->peer.enddisc.len));
|
|
|
|
prompt_Printf(arg->prompt, "\nDefaults:\n");
|
|
|
|
prompt_Printf(arg->prompt, " MRRU: ");
|
|
if (mp->cfg.mrru)
|
|
prompt_Printf(arg->prompt, "%d (multilink enabled)\n", mp->cfg.mrru);
|
|
else
|
|
prompt_Printf(arg->prompt, "disabled\n");
|
|
prompt_Printf(arg->prompt, " Short Seq: %s\n",
|
|
command_ShowNegval(mp->cfg.shortseq));
|
|
prompt_Printf(arg->prompt, " Discriminator: %s\n",
|
|
command_ShowNegval(mp->cfg.negenddisc));
|
|
prompt_Printf(arg->prompt, " AutoLoad: min %d%%, max %d%%,"
|
|
" period %d secs\n", mp->cfg.autoload.min,
|
|
mp->cfg.autoload.max, mp->cfg.autoload.period);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const char *
|
|
mp_Enddisc(u_char c, const char *address, size_t len)
|
|
{
|
|
static char result[100]; /* Used immediately after it's returned */
|
|
unsigned f, header;
|
|
|
|
switch (c) {
|
|
case ENDDISC_NULL:
|
|
sprintf(result, "Null Class");
|
|
break;
|
|
|
|
case ENDDISC_LOCAL:
|
|
snprintf(result, sizeof result, "Local Addr: %.*s", (int)len,
|
|
address);
|
|
break;
|
|
|
|
case ENDDISC_IP:
|
|
if (len == 4)
|
|
snprintf(result, sizeof result, "IP %s",
|
|
inet_ntoa(*(const struct in_addr *)address));
|
|
else
|
|
sprintf(result, "IP[%zd] ???", len);
|
|
break;
|
|
|
|
case ENDDISC_MAC:
|
|
if (len == 6) {
|
|
const u_char *m = (const u_char *)address;
|
|
snprintf(result, sizeof result, "MAC %02x:%02x:%02x:%02x:%02x:%02x",
|
|
m[0], m[1], m[2], m[3], m[4], m[5]);
|
|
} else
|
|
sprintf(result, "MAC[%zd] ???", len);
|
|
break;
|
|
|
|
case ENDDISC_MAGIC:
|
|
sprintf(result, "Magic: 0x");
|
|
header = strlen(result);
|
|
if (len + header + 1 > sizeof result)
|
|
len = sizeof result - header - 1;
|
|
for (f = 0; f < len; f++)
|
|
sprintf(result + header + 2 * f, "%02x", address[f]);
|
|
break;
|
|
|
|
case ENDDISC_PSN:
|
|
snprintf(result, sizeof result, "PSN: %.*s", (int)len, address);
|
|
break;
|
|
|
|
default:
|
|
sprintf(result, "%d: ", (int)c);
|
|
header = strlen(result);
|
|
if (len + header + 1 > sizeof result)
|
|
len = sizeof result - header - 1;
|
|
for (f = 0; f < len; f++)
|
|
sprintf(result + header + 2 * f, "%02x", address[f]);
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
int
|
|
mp_SetEnddisc(struct cmdargs const *arg)
|
|
{
|
|
struct mp *mp = &arg->bundle->ncp.mp;
|
|
struct in_addr addr;
|
|
|
|
switch (bundle_Phase(arg->bundle)) {
|
|
case PHASE_DEAD:
|
|
break;
|
|
case PHASE_ESTABLISH:
|
|
/* Make sure none of our links are DATALINK_LCP or greater */
|
|
if (bundle_HighestState(arg->bundle) >= DATALINK_LCP) {
|
|
log_Printf(LogWARN, "enddisc: Only changeable before"
|
|
" LCP negotiations\n");
|
|
return 1;
|
|
}
|
|
break;
|
|
default:
|
|
log_Printf(LogWARN, "enddisc: Only changeable at phase DEAD/ESTABLISH\n");
|
|
return 1;
|
|
}
|
|
|
|
if (arg->argc == arg->argn) {
|
|
mp->cfg.enddisc.class = 0;
|
|
*mp->cfg.enddisc.address = '\0';
|
|
mp->cfg.enddisc.len = 0;
|
|
} else if (arg->argc > arg->argn) {
|
|
if (!strcasecmp(arg->argv[arg->argn], "label")) {
|
|
mp->cfg.enddisc.class = ENDDISC_LOCAL;
|
|
strcpy(mp->cfg.enddisc.address, arg->bundle->cfg.label);
|
|
mp->cfg.enddisc.len = strlen(mp->cfg.enddisc.address);
|
|
} else if (!strcasecmp(arg->argv[arg->argn], "ip")) {
|
|
if (arg->bundle->ncp.ipcp.my_ip.s_addr == INADDR_ANY)
|
|
ncprange_getip4addr(&arg->bundle->ncp.ipcp.cfg.my_range, &addr);
|
|
else
|
|
addr = arg->bundle->ncp.ipcp.my_ip;
|
|
memcpy(mp->cfg.enddisc.address, &addr.s_addr, sizeof addr.s_addr);
|
|
mp->cfg.enddisc.class = ENDDISC_IP;
|
|
mp->cfg.enddisc.len = sizeof arg->bundle->ncp.ipcp.my_ip.s_addr;
|
|
} else if (!strcasecmp(arg->argv[arg->argn], "mac")) {
|
|
struct sockaddr_dl hwaddr;
|
|
|
|
if (arg->bundle->ncp.ipcp.my_ip.s_addr == INADDR_ANY)
|
|
ncprange_getip4addr(&arg->bundle->ncp.ipcp.cfg.my_range, &addr);
|
|
else
|
|
addr = arg->bundle->ncp.ipcp.my_ip;
|
|
|
|
if (arp_EtherAddr(addr, &hwaddr, 1)) {
|
|
mp->cfg.enddisc.class = ENDDISC_MAC;
|
|
memcpy(mp->cfg.enddisc.address, hwaddr.sdl_data + hwaddr.sdl_nlen,
|
|
hwaddr.sdl_alen);
|
|
mp->cfg.enddisc.len = hwaddr.sdl_alen;
|
|
} else {
|
|
log_Printf(LogWARN, "set enddisc: Can't locate MAC address for %s\n",
|
|
inet_ntoa(addr));
|
|
return 4;
|
|
}
|
|
} else if (!strcasecmp(arg->argv[arg->argn], "magic")) {
|
|
int f;
|
|
|
|
randinit();
|
|
for (f = 0; f < 20; f += sizeof(long))
|
|
*(long *)(mp->cfg.enddisc.address + f) = random();
|
|
mp->cfg.enddisc.class = ENDDISC_MAGIC;
|
|
mp->cfg.enddisc.len = 20;
|
|
} else if (!strcasecmp(arg->argv[arg->argn], "psn")) {
|
|
if (arg->argc > arg->argn+1) {
|
|
mp->cfg.enddisc.class = ENDDISC_PSN;
|
|
strcpy(mp->cfg.enddisc.address, arg->argv[arg->argn+1]);
|
|
mp->cfg.enddisc.len = strlen(mp->cfg.enddisc.address);
|
|
} else {
|
|
log_Printf(LogWARN, "PSN endpoint requires additional data\n");
|
|
return 5;
|
|
}
|
|
} else {
|
|
log_Printf(LogWARN, "%s: Unrecognised endpoint type\n",
|
|
arg->argv[arg->argn]);
|
|
return 6;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
mpserver_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e,
|
|
int *n)
|
|
{
|
|
struct mpserver *s = descriptor2mpserver(d);
|
|
int result;
|
|
|
|
result = 0;
|
|
if (s->send.dl != NULL) {
|
|
/* We've connect()ed */
|
|
if (!link_QueueLen(&s->send.dl->physical->link) &&
|
|
!s->send.dl->physical->out) {
|
|
/* Only send if we've transmitted all our data (i.e. the ConfigAck) */
|
|
result -= datalink_RemoveFromSet(s->send.dl, r, w, e);
|
|
bundle_SendDatalink(s->send.dl, s->fd, &s->socket);
|
|
s->send.dl = NULL;
|
|
s->fd = -1;
|
|
} else
|
|
/* Never read from a datalink that's on death row ! */
|
|
result -= datalink_RemoveFromSet(s->send.dl, r, NULL, NULL);
|
|
} else if (r && s->fd >= 0) {
|
|
if (*n < s->fd + 1)
|
|
*n = s->fd + 1;
|
|
FD_SET(s->fd, r);
|
|
log_Printf(LogTIMER, "mp: fdset(r) %d\n", s->fd);
|
|
result++;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
mpserver_IsSet(struct fdescriptor *d, const fd_set *fdset)
|
|
{
|
|
struct mpserver *s = descriptor2mpserver(d);
|
|
return s->fd >= 0 && FD_ISSET(s->fd, fdset);
|
|
}
|
|
|
|
static void
|
|
mpserver_Read(struct fdescriptor *d, struct bundle *bundle,
|
|
const fd_set *fdset __unused)
|
|
{
|
|
struct mpserver *s = descriptor2mpserver(d);
|
|
|
|
bundle_ReceiveDatalink(bundle, s->fd);
|
|
}
|
|
|
|
static int
|
|
mpserver_Write(struct fdescriptor *d __unused, struct bundle *bundle __unused,
|
|
const fd_set *fdset __unused)
|
|
{
|
|
/* We never want to write here ! */
|
|
log_Printf(LogALERT, "mpserver_Write: Internal error: Bad call !\n");
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
mpserver_Init(struct mpserver *s)
|
|
{
|
|
s->desc.type = MPSERVER_DESCRIPTOR;
|
|
s->desc.UpdateSet = mpserver_UpdateSet;
|
|
s->desc.IsSet = mpserver_IsSet;
|
|
s->desc.Read = mpserver_Read;
|
|
s->desc.Write = mpserver_Write;
|
|
s->send.dl = NULL;
|
|
s->fd = -1;
|
|
memset(&s->socket, '\0', sizeof s->socket);
|
|
}
|
|
|
|
int
|
|
mpserver_Open(struct mpserver *s, struct peerid *peer)
|
|
{
|
|
int f, l;
|
|
mode_t mask;
|
|
|
|
if (s->fd != -1) {
|
|
log_Printf(LogALERT, "Internal error ! mpserver already open\n");
|
|
mpserver_Close(s);
|
|
}
|
|
|
|
l = snprintf(s->socket.sun_path, sizeof s->socket.sun_path, "%sppp-%s-%02x-",
|
|
_PATH_VARRUN, peer->authname, peer->enddisc.class);
|
|
if (l < 0) {
|
|
log_Printf(LogERROR, "mpserver: snprintf(): %s\n", strerror(errno));
|
|
return MPSERVER_FAILED;
|
|
}
|
|
|
|
for (f = 0;
|
|
f < peer->enddisc.len && (size_t)l < sizeof s->socket.sun_path - 2;
|
|
f++) {
|
|
snprintf(s->socket.sun_path + l, sizeof s->socket.sun_path - l,
|
|
"%02x", *(u_char *)(peer->enddisc.address+f));
|
|
l += 2;
|
|
}
|
|
|
|
s->socket.sun_family = AF_LOCAL;
|
|
s->socket.sun_len = sizeof s->socket;
|
|
s->fd = ID0socket(PF_LOCAL, SOCK_DGRAM, 0);
|
|
if (s->fd < 0) {
|
|
log_Printf(LogERROR, "mpserver: socket(): %s\n", strerror(errno));
|
|
return MPSERVER_FAILED;
|
|
}
|
|
|
|
setsockopt(s->fd, SOL_SOCKET, SO_REUSEADDR, (struct sockaddr *)&s->socket,
|
|
sizeof s->socket);
|
|
mask = umask(0177);
|
|
|
|
/*
|
|
* Try to bind the socket. If we succeed we play server, if we fail
|
|
* we connect() and hand the link off.
|
|
*/
|
|
|
|
if (ID0bind_un(s->fd, &s->socket) < 0) {
|
|
if (errno != EADDRINUSE) {
|
|
log_Printf(LogPHASE, "mpserver: can't create bundle socket %s (%s)\n",
|
|
s->socket.sun_path, strerror(errno));
|
|
umask(mask);
|
|
close(s->fd);
|
|
s->fd = -1;
|
|
return MPSERVER_FAILED;
|
|
}
|
|
|
|
/* So we're the sender */
|
|
umask(mask);
|
|
if (ID0connect_un(s->fd, &s->socket) < 0) {
|
|
log_Printf(LogPHASE, "mpserver: can't connect to bundle socket %s (%s)\n",
|
|
s->socket.sun_path, strerror(errno));
|
|
if (errno == ECONNREFUSED)
|
|
log_Printf(LogPHASE, " The previous server died badly !\n");
|
|
close(s->fd);
|
|
s->fd = -1;
|
|
return MPSERVER_FAILED;
|
|
}
|
|
|
|
/* Donate our link to the other guy */
|
|
return MPSERVER_CONNECTED;
|
|
}
|
|
|
|
return MPSERVER_LISTENING;
|
|
}
|
|
|
|
void
|
|
mpserver_Close(struct mpserver *s)
|
|
{
|
|
if (s->send.dl != NULL) {
|
|
bundle_SendDatalink(s->send.dl, s->fd, &s->socket);
|
|
s->send.dl = NULL;
|
|
s->fd = -1;
|
|
} else if (s->fd >= 0) {
|
|
close(s->fd);
|
|
if (ID0unlink(s->socket.sun_path) == -1)
|
|
log_Printf(LogERROR, "%s: Failed to remove: %s\n", s->socket.sun_path,
|
|
strerror(errno));
|
|
memset(&s->socket, '\0', sizeof s->socket);
|
|
s->fd = -1;
|
|
}
|
|
}
|
|
|
|
void
|
|
mp_LinkLost(struct mp *mp, struct datalink *dl)
|
|
{
|
|
if (mp->seq.min_in == dl->mp.seq)
|
|
/* We've lost the link that's holding everything up ! */
|
|
mp_Assemble(mp, NULL, NULL);
|
|
}
|
|
|
|
size_t
|
|
mp_QueueLen(struct mp *mp)
|
|
{
|
|
return link_QueueLen(&mp->link);
|
|
}
|