298eccdc14
Don't assume MAXHOSTNAMELEN includes the NUL Correct a diagnostic Use "localhost" in our prompt instead of ""
656 lines
19 KiB
C
656 lines
19 KiB
C
/*
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* Copyright 1999 Internet Business Solutions Ltd., Switzerland
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in_systm.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <arpa/inet.h>
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#include <sys/un.h>
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#include <net/route.h>
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#ifdef LOCALRAD
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#include "radlib.h"
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#else
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#include <radlib.h>
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#endif
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#include <errno.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/time.h>
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#include <termios.h>
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#include <ttyent.h>
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#include <unistd.h>
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#include <netdb.h>
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#include "layer.h"
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#include "defs.h"
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#include "log.h"
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#include "descriptor.h"
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#include "prompt.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 "slcompress.h"
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#include "throughput.h"
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#include "lqr.h"
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#include "hdlc.h"
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#include "mbuf.h"
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#include "ipcp.h"
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#include "route.h"
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#include "command.h"
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#include "filter.h"
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#include "lcp.h"
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#include "ccp.h"
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#include "link.h"
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#include "mp.h"
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#include "radius.h"
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#include "auth.h"
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#include "async.h"
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#include "physical.h"
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#include "chat.h"
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#include "cbcp.h"
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#include "chap.h"
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#include "datalink.h"
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#include "bundle.h"
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/*
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* rad_continue_send_request() has given us `got' (non-zero). Deal with it.
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*/
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static void
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radius_Process(struct radius *r, int got)
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{
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char *argv[MAXARGS], *nuke;
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struct bundle *bundle;
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int argc, addrs;
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size_t len;
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struct in_range dest;
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struct in_addr gw;
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const void *data;
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const char *stype;
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r->cx.fd = -1; /* Stop select()ing */
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stype = r->cx.auth ? "auth" : "acct";
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switch (got) {
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case RAD_ACCESS_ACCEPT:
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log_Printf(LogPHASE, "Radius(%s): ACCEPT received\n", stype);
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if (!r->cx.auth) {
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rad_close(r->cx.rad);
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return;
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}
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break;
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case RAD_ACCESS_REJECT:
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log_Printf(LogPHASE, "Radius(%s): REJECT received\n", stype);
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if (r->cx.auth)
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auth_Failure(r->cx.auth);
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rad_close(r->cx.rad);
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return;
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case RAD_ACCESS_CHALLENGE:
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/* we can't deal with this (for now) ! */
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log_Printf(LogPHASE, "Radius: CHALLENGE received (can't handle yet)\n");
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if (r->cx.auth)
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auth_Failure(r->cx.auth);
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rad_close(r->cx.rad);
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return;
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case RAD_ACCOUNTING_RESPONSE:
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log_Printf(LogPHASE, "Radius(%s): Accounting response received\n", stype);
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if (r->cx.auth)
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auth_Failure(r->cx.auth); /* unexpected !!! */
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/* No further processing for accounting requests, please */
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rad_close(r->cx.rad);
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return;
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case -1:
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log_Printf(LogPHASE, "radius(%s): %s\n", stype, rad_strerror(r->cx.rad));
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if (r->cx.auth)
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auth_Failure(r->cx.auth);
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rad_close(r->cx.rad);
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return;
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default:
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log_Printf(LogERROR, "rad_send_request(%s): Failed %d: %s\n", stype,
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got, rad_strerror(r->cx.rad));
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if (r->cx.auth)
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auth_Failure(r->cx.auth);
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rad_close(r->cx.rad);
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return;
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}
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/* So we've been accepted ! Let's see what we've got in our reply :-I */
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r->ip.s_addr = r->mask.s_addr = INADDR_NONE;
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r->mtu = 0;
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r->vj = 0;
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while ((got = rad_get_attr(r->cx.rad, &data, &len)) > 0) {
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switch (got) {
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case RAD_FRAMED_IP_ADDRESS:
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r->ip = rad_cvt_addr(data);
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log_Printf(LogPHASE, " IP %s\n", inet_ntoa(r->ip));
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break;
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case RAD_FRAMED_IP_NETMASK:
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r->mask = rad_cvt_addr(data);
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log_Printf(LogPHASE, " Netmask %s\n", inet_ntoa(r->mask));
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break;
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case RAD_FRAMED_MTU:
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r->mtu = rad_cvt_int(data);
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log_Printf(LogPHASE, " MTU %lu\n", r->mtu);
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break;
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case RAD_FRAMED_ROUTING:
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/* Disabled for now - should we automatically set up some filters ? */
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/* rad_cvt_int(data); */
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/* bit 1 = Send routing packets */
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/* bit 2 = Receive routing packets */
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break;
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case RAD_FRAMED_COMPRESSION:
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r->vj = rad_cvt_int(data) == 1 ? 1 : 0;
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log_Printf(LogPHASE, " VJ %sabled\n", r->vj ? "en" : "dis");
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break;
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case RAD_FRAMED_ROUTE:
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/*
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* We expect a string of the format ``dest[/bits] gw [metrics]''
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* Any specified metrics are ignored. MYADDR and HISADDR are
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* understood for ``dest'' and ``gw'' and ``0.0.0.0'' is the same
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* as ``HISADDR''.
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*/
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if ((nuke = rad_cvt_string(data, len)) == NULL) {
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log_Printf(LogERROR, "rad_cvt_string: %s\n", rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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log_Printf(LogPHASE, " Route: %s\n", nuke);
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bundle = r->cx.auth->physical->dl->bundle;
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dest.ipaddr.s_addr = dest.mask.s_addr = INADDR_ANY;
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dest.width = 0;
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argc = command_Interpret(nuke, strlen(nuke), argv);
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if (argc < 0)
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log_Printf(LogWARN, "radius: %s: Syntax error\n",
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argc == 1 ? argv[0] : "\"\"");
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else if (argc < 2)
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log_Printf(LogWARN, "radius: %s: Invalid route\n",
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argc == 1 ? argv[0] : "\"\"");
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else if ((strcasecmp(argv[0], "default") != 0 &&
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!ParseAddr(&bundle->ncp.ipcp, argv[0], &dest.ipaddr,
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&dest.mask, &dest.width)) ||
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!ParseAddr(&bundle->ncp.ipcp, argv[1], &gw, NULL, NULL))
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log_Printf(LogWARN, "radius: %s %s: Invalid route\n",
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argv[0], argv[1]);
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else {
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if (dest.width == 32 && strchr(argv[0], '/') == NULL)
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/* No mask specified - use the natural mask */
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dest.mask = addr2mask(dest.ipaddr);
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addrs = 0;
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if (!strncasecmp(argv[0], "HISADDR", 7))
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addrs = ROUTE_DSTHISADDR;
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else if (!strncasecmp(argv[0], "MYADDR", 6))
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addrs = ROUTE_DSTMYADDR;
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if (gw.s_addr == INADDR_ANY) {
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addrs |= ROUTE_GWHISADDR;
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gw = bundle->ncp.ipcp.peer_ip;
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} else if (strcasecmp(argv[1], "HISADDR") == 0)
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addrs |= ROUTE_GWHISADDR;
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route_Add(&r->routes, addrs, dest.ipaddr, dest.mask, gw);
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}
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free(nuke);
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break;
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}
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}
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if (got == -1) {
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log_Printf(LogERROR, "rad_get_attr: %s (failing!)\n",
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rad_strerror(r->cx.rad));
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auth_Failure(r->cx.auth);
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rad_close(r->cx.rad);
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} else {
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r->valid = 1;
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auth_Success(r->cx.auth);
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rad_close(r->cx.rad);
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}
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}
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/*
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* We've either timed out or select()ed on the read descriptor
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*/
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static void
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radius_Continue(struct radius *r, int sel)
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{
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struct timeval tv;
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int got;
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timer_Stop(&r->cx.timer);
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if ((got = rad_continue_send_request(r->cx.rad, sel, &r->cx.fd, &tv)) == 0) {
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log_Printf(LogPHASE, "Radius: Request re-sent\n");
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r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS;
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timer_Start(&r->cx.timer);
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return;
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}
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radius_Process(r, got);
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}
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/*
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* Time to call rad_continue_send_request() - timed out.
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*/
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static void
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radius_Timeout(void *v)
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{
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radius_Continue((struct radius *)v, 0);
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}
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/*
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* Time to call rad_continue_send_request() - something to read.
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*/
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static void
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radius_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
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{
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radius_Continue(descriptor2radius(d), 1);
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}
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/*
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* Behave as a struct fdescriptor (descriptor.h)
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*/
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static int
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radius_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
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{
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struct radius *rad = descriptor2radius(d);
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if (r && rad->cx.fd != -1) {
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FD_SET(rad->cx.fd, r);
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if (*n < rad->cx.fd + 1)
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*n = rad->cx.fd + 1;
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log_Printf(LogTIMER, "Radius: fdset(r) %d\n", rad->cx.fd);
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return 1;
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}
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return 0;
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}
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/*
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* Behave as a struct fdescriptor (descriptor.h)
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*/
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static int
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radius_IsSet(struct fdescriptor *d, const fd_set *fdset)
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{
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struct radius *r = descriptor2radius(d);
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return r && r->cx.fd != -1 && FD_ISSET(r->cx.fd, fdset);
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}
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/*
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* Behave as a struct fdescriptor (descriptor.h)
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*/
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static int
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radius_Write(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
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{
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/* We never want to write here ! */
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log_Printf(LogALERT, "radius_Write: Internal error: Bad call !\n");
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return 0;
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}
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/*
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* Initialise ourselves
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*/
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void
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radius_Init(struct radius *r)
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{
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r->valid = 0;
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r->cx.fd = -1;
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*r->cfg.file = '\0';;
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r->desc.type = RADIUS_DESCRIPTOR;
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r->desc.UpdateSet = radius_UpdateSet;
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r->desc.IsSet = radius_IsSet;
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r->desc.Read = radius_Read;
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r->desc.Write = radius_Write;
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memset(&r->cx.timer, '\0', sizeof r->cx.timer);
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log_Printf(LogDEBUG, "Radius: radius_Init\n");
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}
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/*
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* Forget everything and go back to initialised state.
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*/
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void
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radius_Destroy(struct radius *r)
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{
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r->valid = 0;
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log_Printf(LogDEBUG, "Radius: radius_Destroy\n");
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timer_Stop(&r->cx.timer);
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route_DeleteAll(&r->routes);
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if (r->cx.fd != -1) {
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r->cx.fd = -1;
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rad_close(r->cx.rad);
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}
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}
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/*
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* Start an authentication request to the RADIUS server.
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*/
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void
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radius_Authenticate(struct radius *r, struct authinfo *authp, const char *name,
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const char *key, const char *challenge)
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{
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struct ttyent *ttyp;
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struct timeval tv;
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int got, slot;
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char hostname[MAXHOSTNAMELEN + 1];
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struct hostent *hp;
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struct in_addr hostaddr;
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if (!*r->cfg.file)
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return;
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if (r->cx.fd != -1)
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/*
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* We assume that our name/key/challenge is the same as last time,
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* and just continue to wait for the RADIUS server(s).
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*/
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return;
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radius_Destroy(r);
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if ((r->cx.rad = rad_auth_open()) == NULL) {
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log_Printf(LogERROR, "rad_auth_open: %s\n", strerror(errno));
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return;
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}
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if (rad_config(r->cx.rad, r->cfg.file) != 0) {
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log_Printf(LogERROR, "rad_config: %s\n", rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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if (rad_create_request(r->cx.rad, RAD_ACCESS_REQUEST) != 0) {
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log_Printf(LogERROR, "rad_create_request: %s\n", rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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if (rad_put_string(r->cx.rad, RAD_USER_NAME, name) != 0 ||
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rad_put_int(r->cx.rad, RAD_SERVICE_TYPE, RAD_FRAMED) != 0 ||
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rad_put_int(r->cx.rad, RAD_FRAMED_PROTOCOL, RAD_PPP) != 0) {
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log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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if (challenge != NULL) {
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/* We're talking CHAP */
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if (rad_put_string(r->cx.rad, RAD_CHAP_PASSWORD, key) != 0 ||
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rad_put_string(r->cx.rad, RAD_CHAP_CHALLENGE, challenge) != 0) {
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log_Printf(LogERROR, "CHAP: rad_put_string: %s\n",
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rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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} else if (rad_put_string(r->cx.rad, RAD_USER_PASSWORD, key) != 0) {
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/* We're talking PAP */
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log_Printf(LogERROR, "PAP: rad_put_string: %s\n", rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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if (gethostname(hostname, sizeof hostname) != 0)
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log_Printf(LogERROR, "rad_put: gethostname(): %s\n", strerror(errno));
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else {
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if ((hp = gethostbyname(hostname)) != NULL) {
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hostaddr.s_addr = *(u_long *)hp->h_addr;
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if (rad_put_addr(r->cx.rad, RAD_NAS_IP_ADDRESS, hostaddr) != 0) {
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log_Printf(LogERROR, "rad_put: rad_put_string: %s\n",
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rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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}
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if (rad_put_string(r->cx.rad, RAD_NAS_IDENTIFIER, hostname) != 0) {
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log_Printf(LogERROR, "rad_put: rad_put_string: %s\n",
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rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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}
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if (authp->physical->handler &&
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authp->physical->handler->type == TTY_DEVICE) {
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setttyent();
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for (slot = 1; (ttyp = getttyent()); ++slot)
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if (!strcmp(ttyp->ty_name, authp->physical->name.base)) {
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if(rad_put_int(r->cx.rad, RAD_NAS_PORT, slot) != 0) {
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log_Printf(LogERROR, "rad_put: rad_put_string: %s\n",
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rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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endttyent();
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return;
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}
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break;
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}
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endttyent();
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}
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r->cx.auth = authp;
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if ((got = rad_init_send_request(r->cx.rad, &r->cx.fd, &tv)))
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radius_Process(r, got);
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else {
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log_Printf(LogPHASE, "Radius: Request sent\n");
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log_Printf(LogDEBUG, "Using radius_Timeout [%p]\n", radius_Timeout);
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r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS;
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r->cx.timer.func = radius_Timeout;
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r->cx.timer.name = "radius auth";
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r->cx.timer.arg = r;
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timer_Start(&r->cx.timer);
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}
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}
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/*
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* Send an accounting request to the RADIUS server
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*/
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void
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radius_Account(struct radius *r, struct radacct *ac, struct datalink *dl,
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int acct_type, struct in_addr *peer_ip, struct in_addr *netmask,
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struct pppThroughput *stats)
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{
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struct ttyent *ttyp;
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struct timeval tv;
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int got, slot;
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char hostname[MAXHOSTNAMELEN + 1];
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struct hostent *hp;
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struct in_addr hostaddr;
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if (!*r->cfg.file)
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return;
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if (r->cx.fd != -1)
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/*
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* We assume that our name/key/challenge is the same as last time,
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* and just continue to wait for the RADIUS server(s).
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*/
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return;
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radius_Destroy(r);
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if ((r->cx.rad = rad_acct_open()) == NULL) {
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log_Printf(LogERROR, "rad_auth_open: %s\n", strerror(errno));
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return;
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}
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if (rad_config(r->cx.rad, r->cfg.file) != 0) {
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log_Printf(LogERROR, "rad_config: %s\n", rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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if (rad_create_request(r->cx.rad, RAD_ACCOUNTING_REQUEST) != 0) {
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log_Printf(LogERROR, "rad_create_request: %s\n", rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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/* Grab some accounting data and initialize structure */
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if (acct_type == RAD_START) {
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ac->rad_parent = r;
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/* Fetch username from datalink */
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strncpy(ac->user_name, dl->peer.authname, sizeof ac->user_name);
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ac->user_name[AUTHLEN-1] = '\0';
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ac->authentic = 2; /* Assume RADIUS verified auth data */
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/* Generate a session ID */
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snprintf(ac->session_id, sizeof ac->session_id, "%s%d-%s%lu",
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dl->bundle->cfg.auth.name, (int)getpid(),
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dl->peer.authname, (unsigned long)stats->uptime);
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/* And grab our MP socket name */
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snprintf(ac->multi_session_id, sizeof ac->multi_session_id, "%s",
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dl->bundle->ncp.mp.active ?
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dl->bundle->ncp.mp.server.socket.sun_path : "");
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/* Fetch IP, netmask from IPCP */
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memcpy(&ac->ip, peer_ip, sizeof(ac->ip));
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memcpy(&ac->mask, netmask, sizeof(ac->mask));
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};
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if (rad_put_string(r->cx.rad, RAD_USER_NAME, ac->user_name) != 0 ||
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rad_put_int(r->cx.rad, RAD_SERVICE_TYPE, RAD_FRAMED) != 0 ||
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rad_put_int(r->cx.rad, RAD_FRAMED_PROTOCOL, RAD_PPP) != 0 ||
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rad_put_addr(r->cx.rad, RAD_FRAMED_IP_ADDRESS, ac->ip) != 0 ||
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rad_put_addr(r->cx.rad, RAD_FRAMED_IP_NETMASK, ac->mask) != 0) {
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log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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if (gethostname(hostname, sizeof hostname) != 0)
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log_Printf(LogERROR, "rad_put: gethostname(): %s\n", strerror(errno));
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else {
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if ((hp = gethostbyname(hostname)) != NULL) {
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hostaddr.s_addr = *(u_long *)hp->h_addr;
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if (rad_put_addr(r->cx.rad, RAD_NAS_IP_ADDRESS, hostaddr) != 0) {
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log_Printf(LogERROR, "rad_put: rad_put_string: %s\n",
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rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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}
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if (rad_put_string(r->cx.rad, RAD_NAS_IDENTIFIER, hostname) != 0) {
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log_Printf(LogERROR, "rad_put: rad_put_string: %s\n",
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rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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}
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if (dl->physical->handler &&
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dl->physical->handler->type == TTY_DEVICE) {
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setttyent();
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for (slot = 1; (ttyp = getttyent()); ++slot)
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if (!strcmp(ttyp->ty_name, dl->physical->name.base)) {
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if(rad_put_int(r->cx.rad, RAD_NAS_PORT, slot) != 0) {
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log_Printf(LogERROR, "rad_put: rad_put_string: %s\n",
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rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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endttyent();
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return;
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}
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break;
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}
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endttyent();
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}
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if (rad_put_int(r->cx.rad, RAD_ACCT_STATUS_TYPE, acct_type) != 0 ||
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rad_put_string(r->cx.rad, RAD_ACCT_SESSION_ID, ac->session_id) != 0 ||
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rad_put_string(r->cx.rad, RAD_ACCT_MULTI_SESSION_ID,
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ac->multi_session_id) != 0 ||
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rad_put_int(r->cx.rad, RAD_ACCT_DELAY_TIME, 0) != 0) {
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/* XXX ACCT_DELAY_TIME should be increased each time a packet is waiting */
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log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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if (acct_type == RAD_STOP)
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/* Show some statistics */
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if (rad_put_int(r->cx.rad, RAD_ACCT_INPUT_OCTETS, stats->OctetsIn) != 0 ||
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rad_put_int(r->cx.rad, RAD_ACCT_INPUT_PACKETS, stats->PacketsIn) != 0 ||
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rad_put_int(r->cx.rad, RAD_ACCT_OUTPUT_OCTETS, stats->OctetsOut) != 0 ||
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rad_put_int(r->cx.rad, RAD_ACCT_OUTPUT_PACKETS, stats->PacketsOut)
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!= 0 ||
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rad_put_int(r->cx.rad, RAD_ACCT_SESSION_TIME, throughput_uptime(stats))
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!= 0) {
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log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad));
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rad_close(r->cx.rad);
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return;
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}
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r->cx.auth = NULL; /* Not valid for accounting requests */
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if ((got = rad_init_send_request(r->cx.rad, &r->cx.fd, &tv)))
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radius_Process(r, got);
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else {
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log_Printf(LogDEBUG, "Using radius_Timeout [%p]\n", radius_Timeout);
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r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS;
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r->cx.timer.func = radius_Timeout;
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r->cx.timer.name = "radius acct";
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r->cx.timer.arg = r;
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timer_Start(&r->cx.timer);
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}
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}
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/*
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* How do things look at the moment ?
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*/
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void
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radius_Show(struct radius *r, struct prompt *p)
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{
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prompt_Printf(p, " Radius config: %s",
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*r->cfg.file ? r->cfg.file : "none");
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if (r->valid) {
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prompt_Printf(p, "\n IP: %s\n", inet_ntoa(r->ip));
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prompt_Printf(p, " Netmask: %s\n", inet_ntoa(r->mask));
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prompt_Printf(p, " MTU: %lu\n", r->mtu);
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prompt_Printf(p, " VJ: %sabled\n", r->vj ? "en" : "dis");
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if (r->routes)
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route_ShowSticky(p, r->routes, " Routes", 16);
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} else
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prompt_Printf(p, " (not authenticated)\n");
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}
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