42d4d39668
This will ultimately be a member of a list of descriptors and their handler functions on which we need to select() in the main loop. o Make struct physical into a `sort' of struct descriptor.
585 lines
16 KiB
C
585 lines
16 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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* $Id: bundle.c,v 1.1.2.6 1998/02/08 19:29:43 brian Exp $
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*/
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <arpa/inet.h>
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#include <net/route.h>
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#include <net/if_dl.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#include <unistd.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 "id.h"
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#include "defs.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 "hdlc.h"
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#include "throughput.h"
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#include "ipcp.h"
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#include "link.h"
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#include "bundle.h"
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#include "loadalias.h"
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#include "vars.h"
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#include "arp.h"
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#include "systems.h"
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#include "route.h"
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#include "lcp.h"
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#include "ccp.h"
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#include "async.h"
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#include "descriptor.h"
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#include "physical.h"
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#include "modem.h"
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#include "main.h"
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#include "auth.h"
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#include "lcpproto.h"
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#include "pap.h"
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#include "chap.h"
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#include "tun.h"
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static const char *PhaseNames[] = {
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"Dead", "Establish", "Authenticate", "Network", "Terminate"
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};
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const char *
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bundle_PhaseName(struct bundle *bundle)
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{
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return bundle->phase <= PHASE_TERMINATE ?
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PhaseNames[bundle->phase] : "unknown";
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}
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void
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bundle_NewPhase(struct bundle *bundle, struct physical *physical, u_int new)
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{
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if (new <= PHASE_NETWORK)
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LogPrintf(LogPHASE, "bundle_NewPhase: %s\n", PhaseNames[new]);
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switch (new) {
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case PHASE_DEAD:
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bundle->phase = new;
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if (CleaningUp || (mode & MODE_DIRECT) ||
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((mode & MODE_BACKGROUND) && reconnectState != RECON_TRUE))
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Cleanup(EX_DEAD);
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break;
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case PHASE_ESTABLISH:
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bundle->phase = new;
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break;
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case PHASE_AUTHENTICATE:
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LcpInfo.auth_ineed = LcpInfo.want_auth;
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LcpInfo.auth_iwait = LcpInfo.his_auth;
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if (LcpInfo.his_auth || LcpInfo.want_auth) {
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LogPrintf(LogPHASE, " his = %s, mine = %s\n",
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Auth2Nam(LcpInfo.his_auth), Auth2Nam(LcpInfo.want_auth));
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/* XXX-ML AuthPapInfo and AuthChapInfo must be allocated! */
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if (LcpInfo.his_auth == PROTO_PAP)
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StartAuthChallenge(&AuthPapInfo, physical);
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if (LcpInfo.want_auth == PROTO_CHAP)
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StartAuthChallenge(&AuthChapInfo, physical);
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bundle->phase = new;
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Prompt(bundle);
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} else
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bundle_NewPhase(bundle, physical, PHASE_NETWORK);
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break;
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case PHASE_NETWORK:
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tun_configure(bundle, LcpInfo.his_mru, modem_Speed(physical));
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IpcpUp();
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IpcpOpen();
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CcpUp();
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CcpOpen();
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/* Fall through */
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case PHASE_TERMINATE:
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bundle->phase = new;
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Prompt(bundle);
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break;
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}
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}
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static int
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bundle_CleanInterface(const struct bundle *bundle)
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{
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int s;
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struct ifreq ifrq;
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struct ifaliasreq ifra;
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s = ID0socket(AF_INET, SOCK_DGRAM, 0);
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if (s < 0) {
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LogPrintf(LogERROR, "bundle_CleanInterface: socket(): %s\n",
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strerror(errno));
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return (-1);
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}
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strncpy(ifrq.ifr_name, bundle->ifname, sizeof ifrq.ifr_name - 1);
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ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
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while (ID0ioctl(s, SIOCGIFADDR, &ifrq) == 0) {
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memset(&ifra.ifra_mask, '\0', sizeof ifra.ifra_mask);
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strncpy(ifra.ifra_name, bundle->ifname, sizeof ifra.ifra_name - 1);
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ifra.ifra_name[sizeof ifra.ifra_name - 1] = '\0';
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ifra.ifra_addr = ifrq.ifr_addr;
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if (ID0ioctl(s, SIOCGIFDSTADDR, &ifrq) < 0) {
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if (ifra.ifra_addr.sa_family == AF_INET)
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LogPrintf(LogERROR,
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"bundle_CleanInterface: Can't get dst for %s on %s !\n",
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inet_ntoa(((struct sockaddr_in *)&ifra.ifra_addr)->sin_addr),
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bundle->ifname);
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return 0;
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}
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ifra.ifra_broadaddr = ifrq.ifr_dstaddr;
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if (ID0ioctl(s, SIOCDIFADDR, &ifra) < 0) {
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if (ifra.ifra_addr.sa_family == AF_INET)
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LogPrintf(LogERROR,
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"bundle_CleanInterface: Can't delete %s address on %s !\n",
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inet_ntoa(((struct sockaddr_in *)&ifra.ifra_addr)->sin_addr),
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bundle->ifname);
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return 0;
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}
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}
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return 1;
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}
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void
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bundle_LayerStart(struct bundle *bundle, struct fsm *fp)
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{
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if (fp == &LcpInfo.fsm)
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bundle_NewPhase(bundle, link2physical(fp->link), PHASE_ESTABLISH);
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}
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void
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bundle_LayerUp(struct bundle *bundle, struct fsm *fp)
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{
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/* The given fsm is now up */
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if (fp == &LcpInfo.fsm) {
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reconnectState = RECON_UNKNOWN;
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bundle_NewPhase(bundle, link2physical(fp->link), PHASE_AUTHENTICATE);
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}
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if (fp == &IpcpInfo.fsm)
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if (mode & MODE_BACKGROUND && BGFiledes[1] != -1) {
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char c = EX_NORMAL;
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if (write(BGFiledes[1], &c, 1) == 1)
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LogPrintf(LogPHASE, "Parent notified of success.\n");
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else
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LogPrintf(LogPHASE, "Failed to notify parent of success.\n");
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close(BGFiledes[1]);
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BGFiledes[1] = -1;
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}
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}
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int
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bundle_LinkIsUp(const struct bundle *bundle)
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{
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return IpcpInfo.fsm.state == ST_OPENED;
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}
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void
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bundle_Close(struct bundle *bundle, struct fsm *fp)
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{
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/*
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* Please close the given FSM.
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*
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* If fp is any CCP, just FsmClose that CCP.
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*
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* If fp == NULL or fp is the last NCP or the last LCP, enter TERMINATE phase.
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*
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* If fp == NULL, FsmClose all NCPs.
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*
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* If fp is an NCP, just FsmClose that. When the NCPs TLF happens,
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* and if it's the last NCP, bundle_LayerFinish will enter TERMINATE
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* phase, FsmDown the top level CCP and FsmClose each of the LCPs.
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*
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* If fp is the last LCP, FsmClose all NCPs for the same
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* reasons as above.
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*
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* If fp isn't an NCP and isn't the last LCP, just FsmClose that LCP.
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*/
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if (fp == &CcpInfo.fsm) {
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FsmClose(&CcpInfo.fsm);
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return;
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}
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bundle_NewPhase(bundle, NULL, PHASE_TERMINATE);
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FsmClose(&IpcpInfo.fsm);
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FsmClose(&CcpInfo.fsm);
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}
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/*
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* Open tunnel device and returns its descriptor
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*/
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#define MAX_TUN 256
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/*
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* MAX_TUN is set at 256 because that is the largest minor number
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* we can use (certainly with mknod(1) anyway. The search for a
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* device aborts when it reaches the first `Device not configured'
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* (ENXIO) or the third `No such file or directory' (ENOENT) error.
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*/
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struct bundle *
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bundle_Create(const char *prefix)
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{
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int s, enoentcount, err;
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struct ifreq ifrq;
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static struct bundle bundle; /* there can be only one */
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if (bundle.ifname != NULL) { /* Already allocated ! */
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LogPrintf(LogERROR, "bundle_Create: There's only one BUNDLE !\n");
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return NULL;
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}
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err = ENOENT;
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enoentcount = 0;
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for (bundle.unit = 0; bundle.unit <= MAX_TUN; bundle.unit++) {
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snprintf(bundle.dev, sizeof bundle.dev, "%s%d", prefix, bundle.unit);
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bundle.tun_fd = ID0open(bundle.dev, O_RDWR);
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if (bundle.tun_fd >= 0)
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break;
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if (errno == ENXIO) {
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bundle.unit = MAX_TUN;
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err = errno;
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} else if (errno == ENOENT) {
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if (++enoentcount > 2)
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bundle.unit = MAX_TUN;
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} else
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err = errno;
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}
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if (bundle.unit > MAX_TUN) {
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if (VarTerm)
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fprintf(VarTerm, "No tunnel device is available (%s).\n", strerror(err));
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return NULL;
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}
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LogSetTun(bundle.unit);
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s = socket(AF_INET, SOCK_DGRAM, 0);
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if (s < 0) {
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LogPrintf(LogERROR, "bundle_Create: socket(): %s\n", strerror(errno));
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close(bundle.tun_fd);
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return NULL;
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}
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bundle.ifname = strrchr(bundle.dev, '/');
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if (bundle.ifname == NULL)
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bundle.ifname = bundle.dev;
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else
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bundle.ifname++;
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/*
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* Now, bring up the interface.
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*/
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memset(&ifrq, '\0', sizeof ifrq);
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strncpy(ifrq.ifr_name, bundle.ifname, sizeof ifrq.ifr_name - 1);
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ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
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if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
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LogPrintf(LogERROR, "OpenTunnel: ioctl(SIOCGIFFLAGS): %s\n",
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strerror(errno));
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close(s);
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close(bundle.tun_fd);
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bundle.ifname = NULL;
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return NULL;
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}
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ifrq.ifr_flags |= IFF_UP;
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if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
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LogPrintf(LogERROR, "OpenTunnel: ioctl(SIOCSIFFLAGS): %s\n",
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strerror(errno));
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close(s);
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close(bundle.tun_fd);
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bundle.ifname = NULL;
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return NULL;
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}
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close(s);
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if ((bundle.ifIndex = GetIfIndex(bundle.ifname)) < 0) {
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LogPrintf(LogERROR, "OpenTunnel: Can't find ifindex.\n");
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close(bundle.tun_fd);
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bundle.ifname = NULL;
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return NULL;
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}
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if (VarTerm)
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fprintf(VarTerm, "Using interface: %s\n", bundle.ifname);
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LogPrintf(LogPHASE, "Using interface: %s\n", bundle.ifname);
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bundle.routing_seq = 0;
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bundle.phase = 0;
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/* Clean out any leftover crud */
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bundle_CleanInterface(&bundle);
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bundle.physical = modem_Create("Modem");
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if (bundle.physical == NULL) {
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LogPrintf(LogERROR, "Cannot create modem device: %s\n", strerror(errno));
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return NULL;
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}
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IpcpDefAddress();
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LcpInit(&bundle, bundle.physical);
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IpcpInit(&bundle, physical2link(bundle.physical));
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CcpInit(&bundle, physical2link(bundle.physical));
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return &bundle;
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}
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static void
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bundle_DownInterface(struct bundle *bundle)
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{
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struct ifreq ifrq;
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int s;
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DeleteIfRoutes(bundle, 1);
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s = ID0socket(AF_INET, SOCK_DGRAM, 0);
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if (s < 0) {
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LogPrintf(LogERROR, "bundle_DownInterface: socket: %s\n", strerror(errno));
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return;
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}
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memset(&ifrq, '\0', sizeof ifrq);
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strncpy(ifrq.ifr_name, bundle->ifname, sizeof ifrq.ifr_name - 1);
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ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
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if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
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LogPrintf(LogERROR, "bundle_DownInterface: ioctl(SIOCGIFFLAGS): %s\n",
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strerror(errno));
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close(s);
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return;
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}
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ifrq.ifr_flags &= ~IFF_UP;
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if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
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LogPrintf(LogERROR, "bundle_DownInterface: ioctl(SIOCSIFFLAGS): %s\n",
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strerror(errno));
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close(s);
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return;
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}
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close(s);
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}
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void
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bundle_Destroy(struct bundle *bundle)
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{
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if (mode & MODE_AUTO) {
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IpcpCleanInterface(&IpcpInfo.fsm);
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bundle_DownInterface(bundle);
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}
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link_Destroy(&bundle->physical->link);
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bundle->ifname = NULL;
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}
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struct rtmsg {
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struct rt_msghdr m_rtm;
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char m_space[64];
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};
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void
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bundle_SetRoute(struct bundle *bundle, int cmd, struct in_addr dst,
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struct in_addr gateway, struct in_addr mask, int bang)
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{
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struct rtmsg rtmes;
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int s, nb, wb;
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char *cp;
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const char *cmdstr;
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struct sockaddr_in rtdata;
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if (bang)
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cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!");
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else
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cmdstr = (cmd == RTM_ADD ? "Add" : "Delete");
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s = ID0socket(PF_ROUTE, SOCK_RAW, 0);
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if (s < 0) {
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LogPrintf(LogERROR, "bundle_SetRoute: socket(): %s\n", strerror(errno));
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return;
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}
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memset(&rtmes, '\0', sizeof rtmes);
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rtmes.m_rtm.rtm_version = RTM_VERSION;
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rtmes.m_rtm.rtm_type = cmd;
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rtmes.m_rtm.rtm_addrs = RTA_DST;
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rtmes.m_rtm.rtm_seq = ++bundle->routing_seq;
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rtmes.m_rtm.rtm_pid = getpid();
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rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
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memset(&rtdata, '\0', sizeof rtdata);
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rtdata.sin_len = 16;
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rtdata.sin_family = AF_INET;
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rtdata.sin_port = 0;
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rtdata.sin_addr = dst;
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cp = rtmes.m_space;
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memcpy(cp, &rtdata, 16);
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cp += 16;
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if (cmd == RTM_ADD)
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if (gateway.s_addr == INADDR_ANY) {
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/* Add a route through the interface */
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struct sockaddr_dl dl;
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const char *iname;
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int ilen;
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iname = Index2Nam(bundle->ifIndex);
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ilen = strlen(iname);
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dl.sdl_len = sizeof dl - sizeof dl.sdl_data + ilen;
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dl.sdl_family = AF_LINK;
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dl.sdl_index = bundle->ifIndex;
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dl.sdl_type = 0;
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dl.sdl_nlen = ilen;
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dl.sdl_alen = 0;
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dl.sdl_slen = 0;
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strncpy(dl.sdl_data, iname, sizeof dl.sdl_data);
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memcpy(cp, &dl, dl.sdl_len);
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cp += dl.sdl_len;
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rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY;
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} else {
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rtdata.sin_addr = gateway;
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memcpy(cp, &rtdata, 16);
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cp += 16;
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rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY;
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}
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if (dst.s_addr == INADDR_ANY)
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mask.s_addr = INADDR_ANY;
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if (cmd == RTM_ADD || dst.s_addr == INADDR_ANY) {
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rtdata.sin_addr = mask;
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memcpy(cp, &rtdata, 16);
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cp += 16;
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rtmes.m_rtm.rtm_addrs |= RTA_NETMASK;
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}
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nb = cp - (char *) &rtmes;
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rtmes.m_rtm.rtm_msglen = nb;
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wb = ID0write(s, &rtmes, nb);
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|
if (wb < 0) {
|
|
LogPrintf(LogTCPIP, "bundle_SetRoute failure:\n");
|
|
LogPrintf(LogTCPIP, "bundle_SetRoute: Cmd = %s\n", cmd);
|
|
LogPrintf(LogTCPIP, "bundle_SetRoute: Dst = %s\n", inet_ntoa(dst));
|
|
LogPrintf(LogTCPIP, "bundle_SetRoute: Gateway = %s\n", inet_ntoa(gateway));
|
|
LogPrintf(LogTCPIP, "bundle_SetRoute: Mask = %s\n", inet_ntoa(mask));
|
|
failed:
|
|
if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST ||
|
|
(rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST)))
|
|
if (!bang)
|
|
LogPrintf(LogWARN, "Add route failed: %s already exists\n",
|
|
inet_ntoa(dst));
|
|
else {
|
|
rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE;
|
|
if ((wb = ID0write(s, &rtmes, nb)) < 0)
|
|
goto failed;
|
|
}
|
|
else if (cmd == RTM_DELETE &&
|
|
(rtmes.m_rtm.rtm_errno == ESRCH ||
|
|
(rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) {
|
|
if (!bang)
|
|
LogPrintf(LogWARN, "Del route failed: %s: Non-existent\n",
|
|
inet_ntoa(dst));
|
|
} else if (rtmes.m_rtm.rtm_errno == 0)
|
|
LogPrintf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr,
|
|
inet_ntoa(dst), strerror(errno));
|
|
else
|
|
LogPrintf(LogWARN, "%s route failed: %s: %s\n",
|
|
cmdstr, inet_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno));
|
|
}
|
|
LogPrintf(LogDEBUG, "wrote %d: cmd = %s, dst = %x, gateway = %x\n",
|
|
wb, cmdstr, dst.s_addr, gateway.s_addr);
|
|
close(s);
|
|
}
|
|
|
|
void
|
|
bundle_LinkLost(struct bundle *bundle, struct link *link)
|
|
{
|
|
/*
|
|
* Locate the appropriate LCP and its associated CCP, and FsmDown
|
|
* them both.
|
|
* The LCP TLF will notify bundle_LayerFinish() which will
|
|
* slam the top level CCP and all NCPs down.
|
|
*/
|
|
|
|
FsmDown(&LcpInfo.fsm);
|
|
if (CleaningUp || reconnectState == RECON_FALSE)
|
|
FsmClose(&LcpInfo.fsm);
|
|
}
|
|
|
|
void
|
|
bundle_LayerDown(struct bundle *bundle, struct fsm *fp)
|
|
{
|
|
/*
|
|
* The given FSM has been told to come down.
|
|
* We don't do anything here, as the FSM will eventually
|
|
* come up or down and will call LayerUp or LayerFinish.
|
|
*/
|
|
}
|
|
|
|
void
|
|
bundle_LayerFinish(struct bundle *bundle, struct fsm *fp)
|
|
{
|
|
/* The given fsm is now down (fp cannot be NULL)
|
|
*
|
|
* If it's a CCP, just bring it back to STARTING in case we get more REQs
|
|
* If it's an LCP, FsmDown the corresponding CCP and link (if open). The
|
|
* link_Close causes the LCP to be FsmDown()d, so make sure we only close
|
|
* open links. XXX Not if the link is ok to come up again.
|
|
* If it's the last LCP, FsmDown all NCPs
|
|
* If it's the last NCP, FsmClose all LCPs and enter TERMINATE phase.
|
|
*/
|
|
|
|
if (fp == &CcpInfo.fsm) {
|
|
FsmDown(&CcpInfo.fsm);
|
|
FsmOpen(&CcpInfo.fsm);
|
|
} else if (fp == &LcpInfo.fsm) {
|
|
FsmDown(&CcpInfo.fsm);
|
|
|
|
FsmDown(&IpcpInfo.fsm); /* You've lost your underlings */
|
|
FsmClose(&IpcpInfo.fsm); /* ST_INITIAL please */
|
|
|
|
if (link_IsActive(fp->link))
|
|
link_Close(fp->link, bundle, 0); /* clean shutdown */
|
|
|
|
if (!(mode & MODE_AUTO))
|
|
bundle_DownInterface(bundle);
|
|
bundle_NewPhase(bundle, NULL, PHASE_DEAD);
|
|
} else if (fp == &IpcpInfo.fsm) {
|
|
FsmClose(&LcpInfo.fsm);
|
|
if (fp->bundle->phase != PHASE_TERMINATE)
|
|
bundle_NewPhase(bundle, NULL, PHASE_TERMINATE);
|
|
}
|
|
}
|