1206 lines
35 KiB
C
1206 lines
35 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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#include "radlib_vs.h"
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#else
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#include <radlib.h>
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#include <radlib_vs.h>
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#endif
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#include <errno.h>
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#ifndef NODES
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#include <md5.h>
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#endif
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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/time.h>
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#include <termios.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 "ncpaddr.h"
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#include "ip.h"
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#include "ipcp.h"
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#include "ipv6cp.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 "ncp.h"
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#include "bundle.h"
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#include "proto.h"
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#ifndef NODES
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struct mschap_response {
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u_char ident;
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u_char flags;
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u_char lm_response[24];
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u_char nt_response[24];
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};
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struct mschap2_response {
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u_char ident;
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u_char flags;
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u_char pchallenge[16];
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u_char reserved[8];
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u_char response[24];
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};
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#define AUTH_LEN 16
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#define SALT_LEN 2
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#endif
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static const char *
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radius_policyname(int policy)
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{
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switch(policy) {
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case MPPE_POLICY_ALLOWED:
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return "Allowed";
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case MPPE_POLICY_REQUIRED:
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return "Required";
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}
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return NumStr(policy, NULL, 0);
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}
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static const char *
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radius_typesname(int types)
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{
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switch(types) {
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case MPPE_TYPE_40BIT:
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return "40 bit";
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case MPPE_TYPE_128BIT:
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return "128 bit";
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case MPPE_TYPE_40BIT|MPPE_TYPE_128BIT:
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return "40 or 128 bit";
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}
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return NumStr(types, NULL, 0);
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}
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#ifndef NODES
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static void
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demangle(struct radius *r, const void *mangled, size_t mlen,
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char **buf, size_t *len)
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{
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char R[AUTH_LEN]; /* variable names as per rfc2548 */
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const char *S;
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u_char b[16];
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const u_char *A, *C;
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MD5_CTX Context;
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int Slen, i, Clen, Ppos;
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u_char *P;
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if (mlen % 16 != SALT_LEN) {
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log_Printf(LogWARN, "Cannot interpret mangled data of length %ld\n",
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(u_long)mlen);
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*buf = NULL;
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*len = 0;
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return;
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}
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/* We need the RADIUS Request-Authenticator */
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if (rad_request_authenticator(r->cx.rad, R, sizeof R) != AUTH_LEN) {
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log_Printf(LogWARN, "Cannot obtain the RADIUS request authenticator\n");
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*buf = NULL;
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*len = 0;
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return;
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}
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A = (const u_char *)mangled; /* Salt comes first */
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C = (const u_char *)mangled + SALT_LEN; /* Then the ciphertext */
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Clen = mlen - SALT_LEN;
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S = rad_server_secret(r->cx.rad); /* We need the RADIUS secret */
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Slen = strlen(S);
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P = alloca(Clen); /* We derive our plaintext */
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MD5Init(&Context);
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MD5Update(&Context, S, Slen);
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MD5Update(&Context, R, AUTH_LEN);
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MD5Update(&Context, A, SALT_LEN);
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MD5Final(b, &Context);
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Ppos = 0;
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while (Clen) {
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Clen -= 16;
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for (i = 0; i < 16; i++)
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P[Ppos++] = C[i] ^ b[i];
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if (Clen) {
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MD5Init(&Context);
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MD5Update(&Context, S, Slen);
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MD5Update(&Context, C, 16);
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MD5Final(b, &Context);
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}
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C += 16;
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}
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/*
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* The resulting plain text consists of a one-byte length, the text and
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* maybe some padding.
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*/
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*len = *P;
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if (*len > mlen - 1) {
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log_Printf(LogWARN, "Mangled data seems to be garbage\n");
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*buf = NULL;
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*len = 0;
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return;
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}
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*buf = malloc(*len);
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memcpy(*buf, P + 1, *len);
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}
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#endif
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/* XXX: This should go into librarius. */
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#ifndef NOINET6
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static uint8_t *
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rad_cvt_ipv6prefix(const void *data, size_t len)
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{
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const size_t ipv6len = sizeof(struct in6_addr) + 2;
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uint8_t *s;
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if (len > ipv6len)
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return NULL;
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s = malloc(ipv6len);
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if (s != NULL) {
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memset(s, 0, ipv6len);
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memcpy(s, data, len);
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}
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return s;
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}
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#endif
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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, res, width;
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size_t len;
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struct ncprange dest;
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struct ncpaddr gw;
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const void *data;
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const char *stype;
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u_int32_t ipaddr, vendor;
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struct in_addr ip;
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#ifndef NOINET6
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uint8_t ipv6addr[INET6_ADDRSTRLEN];
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struct in6_addr ip6;
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#endif
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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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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_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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/* Let's see what we've got in our reply */
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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 ((res = rad_get_attr(r->cx.rad, &data, &len)) > 0) {
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switch (res) {
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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_FILTER_ID:
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free(r->filterid);
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if ((r->filterid = 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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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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log_Printf(LogPHASE, " Filter \"%s\"\n", r->filterid);
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break;
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case RAD_SESSION_TIMEOUT:
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r->sessiontime = rad_cvt_int(data);
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log_Printf(LogPHASE, " Session-Timeout %lu\n", r->sessiontime);
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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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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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log_Printf(LogPHASE, " Route: %s\n", nuke);
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bundle = r->cx.auth->physical->dl->bundle;
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ip.s_addr = INADDR_ANY;
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ncpaddr_setip4(&gw, ip);
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ncprange_setip4host(&dest, ip);
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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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!ncprange_aton(&dest, &bundle->ncp, argv[0])) ||
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!ncpaddr_aton(&gw, &bundle->ncp, argv[1]))
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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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ncprange_getwidth(&dest, &width);
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if (width == 32 && strchr(argv[0], '/') == NULL) {
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/* No mask specified - use the natural mask */
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ncprange_getip4addr(&dest, &ip);
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ncprange_setip4mask(&dest, addr2mask(ip));
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}
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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 (ncpaddr_getip4addr(&gw, &ipaddr) && ipaddr == INADDR_ANY) {
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addrs |= ROUTE_GWHISADDR;
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ncpaddr_setip4(&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, &gw);
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}
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free(nuke);
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break;
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case RAD_REPLY_MESSAGE:
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free(r->repstr);
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if ((r->repstr = 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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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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log_Printf(LogPHASE, " Reply-Message \"%s\"\n", r->repstr);
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break;
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#ifndef NOINET6
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case RAD_FRAMED_IPV6_PREFIX:
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free(r->ipv6prefix);
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r->ipv6prefix = rad_cvt_ipv6prefix(data, len);
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inet_ntop(AF_INET6, &r->ipv6prefix[2], ipv6addr, sizeof(ipv6addr));
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log_Printf(LogPHASE, " IPv6 %s/%d\n", ipv6addr, r->ipv6prefix[1]);
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break;
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case RAD_FRAMED_IPV6_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. MYADDR6 and HISADDR6 are
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* understood for ``dest'' and ``gw'' and ``::'' is the same
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* as ``HISADDR6''.
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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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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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log_Printf(LogPHASE, " IPv6 Route: %s\n", nuke);
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bundle = r->cx.auth->physical->dl->bundle;
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ncpaddr_setip6(&gw, &in6addr_any);
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ncprange_set(&dest, &gw, 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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!ncprange_aton(&dest, &bundle->ncp, argv[0])) ||
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!ncpaddr_aton(&gw, &bundle->ncp, argv[1]))
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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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addrs = 0;
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if (!strncasecmp(argv[0], "HISADDR6", 8))
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addrs = ROUTE_DSTHISADDR6;
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else if (!strncasecmp(argv[0], "MYADDR6", 7))
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addrs = ROUTE_DSTMYADDR6;
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if (ncpaddr_getip6(&gw, &ip6) && IN6_IS_ADDR_UNSPECIFIED(&ip6)) {
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addrs |= ROUTE_GWHISADDR6;
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ncpaddr_copy(&gw, &bundle->ncp.ipv6cp.hisaddr);
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} else if (strcasecmp(argv[1], "HISADDR6") == 0)
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addrs |= ROUTE_GWHISADDR6;
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route_Add(&r->ipv6routes, addrs, &dest, &gw);
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}
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free(nuke);
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break;
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#endif
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case RAD_VENDOR_SPECIFIC:
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if ((res = rad_get_vendor_attr(&vendor, &data, &len)) <= 0) {
|
|
log_Printf(LogERROR, "rad_get_vendor_attr: %s (failing!)\n",
|
|
rad_strerror(r->cx.rad));
|
|
auth_Failure(r->cx.auth);
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
|
|
switch (vendor) {
|
|
case RAD_VENDOR_MICROSOFT:
|
|
switch (res) {
|
|
#ifndef NODES
|
|
case RAD_MICROSOFT_MS_CHAP_ERROR:
|
|
free(r->errstr);
|
|
if (len == 0)
|
|
r->errstr = NULL;
|
|
else {
|
|
if (len < 3 || ((const char *)data)[1] != '=') {
|
|
/*
|
|
* Only point at the String field if we don't think the
|
|
* peer has misformatted the response.
|
|
*/
|
|
((const char *)data)++;
|
|
len--;
|
|
} else
|
|
log_Printf(LogWARN, "Warning: The MS-CHAP-Error "
|
|
"attribute is mis-formatted. Compensating\n");
|
|
if ((r->errstr = rad_cvt_string((const char *)data,
|
|
len)) == NULL) {
|
|
log_Printf(LogERROR, "rad_cvt_string: %s\n",
|
|
rad_strerror(r->cx.rad));
|
|
auth_Failure(r->cx.auth);
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
log_Printf(LogPHASE, " MS-CHAP-Error \"%s\"\n", r->errstr);
|
|
}
|
|
break;
|
|
|
|
case RAD_MICROSOFT_MS_CHAP2_SUCCESS:
|
|
free(r->msrepstr);
|
|
if (len == 0)
|
|
r->msrepstr = NULL;
|
|
else {
|
|
if (len < 3 || ((const char *)data)[1] != '=') {
|
|
/*
|
|
* Only point at the String field if we don't think the
|
|
* peer has misformatted the response.
|
|
*/
|
|
((const char *)data)++;
|
|
len--;
|
|
} else
|
|
log_Printf(LogWARN, "Warning: The MS-CHAP2-Success "
|
|
"attribute is mis-formatted. Compensating\n");
|
|
if ((r->msrepstr = rad_cvt_string((const char *)data,
|
|
len)) == NULL) {
|
|
log_Printf(LogERROR, "rad_cvt_string: %s\n",
|
|
rad_strerror(r->cx.rad));
|
|
auth_Failure(r->cx.auth);
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
log_Printf(LogPHASE, " MS-CHAP2-Success \"%s\"\n",
|
|
r->msrepstr);
|
|
}
|
|
break;
|
|
|
|
case RAD_MICROSOFT_MS_MPPE_ENCRYPTION_POLICY:
|
|
r->mppe.policy = rad_cvt_int(data);
|
|
log_Printf(LogPHASE, " MS-MPPE-Encryption-Policy %s\n",
|
|
radius_policyname(r->mppe.policy));
|
|
break;
|
|
|
|
case RAD_MICROSOFT_MS_MPPE_ENCRYPTION_TYPES:
|
|
r->mppe.types = rad_cvt_int(data);
|
|
log_Printf(LogPHASE, " MS-MPPE-Encryption-Types %s\n",
|
|
radius_typesname(r->mppe.types));
|
|
break;
|
|
|
|
case RAD_MICROSOFT_MS_MPPE_RECV_KEY:
|
|
free(r->mppe.recvkey);
|
|
demangle(r, data, len, &r->mppe.recvkey, &r->mppe.recvkeylen);
|
|
log_Printf(LogPHASE, " MS-MPPE-Recv-Key ********\n");
|
|
break;
|
|
|
|
case RAD_MICROSOFT_MS_MPPE_SEND_KEY:
|
|
demangle(r, data, len, &r->mppe.sendkey, &r->mppe.sendkeylen);
|
|
log_Printf(LogPHASE, " MS-MPPE-Send-Key ********\n");
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
log_Printf(LogDEBUG, "Dropping MICROSOFT vendor specific "
|
|
"RADIUS attribute %d\n", res);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
log_Printf(LogDEBUG, "Dropping vendor %lu RADIUS attribute %d\n",
|
|
(unsigned long)vendor, res);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
log_Printf(LogDEBUG, "Dropping RADIUS attribute %d\n", res);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (res == -1) {
|
|
log_Printf(LogERROR, "rad_get_attr: %s (failing!)\n",
|
|
rad_strerror(r->cx.rad));
|
|
auth_Failure(r->cx.auth);
|
|
} else if (got == RAD_ACCESS_REJECT)
|
|
auth_Failure(r->cx.auth);
|
|
else {
|
|
r->valid = 1;
|
|
auth_Success(r->cx.auth);
|
|
}
|
|
rad_close(r->cx.rad);
|
|
}
|
|
|
|
/*
|
|
* We've either timed out or select()ed on the read descriptor
|
|
*/
|
|
static void
|
|
radius_Continue(struct radius *r, int sel)
|
|
{
|
|
struct timeval tv;
|
|
int got;
|
|
|
|
timer_Stop(&r->cx.timer);
|
|
if ((got = rad_continue_send_request(r->cx.rad, sel, &r->cx.fd, &tv)) == 0) {
|
|
log_Printf(LogPHASE, "Radius: Request re-sent\n");
|
|
r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS;
|
|
timer_Start(&r->cx.timer);
|
|
return;
|
|
}
|
|
|
|
radius_Process(r, got);
|
|
}
|
|
|
|
/*
|
|
* Time to call rad_continue_send_request() - timed out.
|
|
*/
|
|
static void
|
|
radius_Timeout(void *v)
|
|
{
|
|
radius_Continue((struct radius *)v, 0);
|
|
}
|
|
|
|
/*
|
|
* Time to call rad_continue_send_request() - something to read.
|
|
*/
|
|
static void
|
|
radius_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
|
|
{
|
|
radius_Continue(descriptor2radius(d), 1);
|
|
}
|
|
|
|
/*
|
|
* Behave as a struct fdescriptor (descriptor.h)
|
|
*/
|
|
static int
|
|
radius_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
|
|
{
|
|
struct radius *rad = descriptor2radius(d);
|
|
|
|
if (r && rad->cx.fd != -1) {
|
|
FD_SET(rad->cx.fd, r);
|
|
if (*n < rad->cx.fd + 1)
|
|
*n = rad->cx.fd + 1;
|
|
log_Printf(LogTIMER, "Radius: fdset(r) %d\n", rad->cx.fd);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Behave as a struct fdescriptor (descriptor.h)
|
|
*/
|
|
static int
|
|
radius_IsSet(struct fdescriptor *d, const fd_set *fdset)
|
|
{
|
|
struct radius *r = descriptor2radius(d);
|
|
|
|
return r && r->cx.fd != -1 && FD_ISSET(r->cx.fd, fdset);
|
|
}
|
|
|
|
/*
|
|
* Behave as a struct fdescriptor (descriptor.h)
|
|
*/
|
|
static int
|
|
radius_Write(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
|
|
{
|
|
/* We never want to write here ! */
|
|
log_Printf(LogALERT, "radius_Write: Internal error: Bad call !\n");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Initialise ourselves
|
|
*/
|
|
void
|
|
radius_Init(struct radius *r)
|
|
{
|
|
r->desc.type = RADIUS_DESCRIPTOR;
|
|
r->desc.UpdateSet = radius_UpdateSet;
|
|
r->desc.IsSet = radius_IsSet;
|
|
r->desc.Read = radius_Read;
|
|
r->desc.Write = radius_Write;
|
|
r->cx.fd = -1;
|
|
r->cx.rad = NULL;
|
|
memset(&r->cx.timer, '\0', sizeof r->cx.timer);
|
|
r->cx.auth = NULL;
|
|
r->valid = 0;
|
|
r->vj = 0;
|
|
r->ip.s_addr = INADDR_ANY;
|
|
r->mask.s_addr = INADDR_NONE;
|
|
r->routes = NULL;
|
|
r->mtu = DEF_MTU;
|
|
r->msrepstr = NULL;
|
|
r->repstr = NULL;
|
|
#ifndef NOINET6
|
|
r->ipv6prefix = NULL;
|
|
r->ipv6routes = NULL;
|
|
#endif
|
|
r->errstr = NULL;
|
|
r->mppe.policy = 0;
|
|
r->mppe.types = 0;
|
|
r->mppe.recvkey = NULL;
|
|
r->mppe.recvkeylen = 0;
|
|
r->mppe.sendkey = NULL;
|
|
r->mppe.sendkeylen = 0;
|
|
*r->cfg.file = '\0';;
|
|
log_Printf(LogDEBUG, "Radius: radius_Init\n");
|
|
}
|
|
|
|
/*
|
|
* Forget everything and go back to initialised state.
|
|
*/
|
|
void
|
|
radius_Destroy(struct radius *r)
|
|
{
|
|
r->valid = 0;
|
|
log_Printf(LogDEBUG, "Radius: radius_Destroy\n");
|
|
timer_Stop(&r->cx.timer);
|
|
route_DeleteAll(&r->routes);
|
|
#ifndef NOINET6
|
|
route_DeleteAll(&r->ipv6routes);
|
|
#endif
|
|
free(r->filterid);
|
|
r->filterid = NULL;
|
|
free(r->msrepstr);
|
|
r->msrepstr = NULL;
|
|
free(r->repstr);
|
|
r->repstr = NULL;
|
|
#ifndef NOINET6
|
|
free(r->ipv6prefix);
|
|
r->ipv6prefix = NULL;
|
|
#endif
|
|
free(r->errstr);
|
|
r->errstr = NULL;
|
|
free(r->mppe.recvkey);
|
|
r->mppe.recvkey = NULL;
|
|
r->mppe.recvkeylen = 0;
|
|
free(r->mppe.sendkey);
|
|
r->mppe.sendkey = NULL;
|
|
r->mppe.sendkeylen = 0;
|
|
if (r->cx.fd != -1) {
|
|
r->cx.fd = -1;
|
|
rad_close(r->cx.rad);
|
|
}
|
|
}
|
|
|
|
static int
|
|
radius_put_physical_details(struct rad_handle *rad, struct physical *p)
|
|
{
|
|
int slot, type;
|
|
|
|
type = RAD_VIRTUAL;
|
|
if (p->handler)
|
|
switch (p->handler->type) {
|
|
case I4B_DEVICE:
|
|
type = RAD_ISDN_SYNC;
|
|
break;
|
|
|
|
case TTY_DEVICE:
|
|
type = RAD_ASYNC;
|
|
break;
|
|
|
|
case ETHER_DEVICE:
|
|
type = RAD_ETHERNET;
|
|
break;
|
|
|
|
case TCP_DEVICE:
|
|
case UDP_DEVICE:
|
|
case EXEC_DEVICE:
|
|
case ATM_DEVICE:
|
|
case NG_DEVICE:
|
|
type = RAD_VIRTUAL;
|
|
break;
|
|
}
|
|
|
|
if (rad_put_int(rad, RAD_NAS_PORT_TYPE, type) != 0) {
|
|
log_Printf(LogERROR, "rad_put: rad_put_int: %s\n", rad_strerror(rad));
|
|
rad_close(rad);
|
|
return 0;
|
|
}
|
|
|
|
if ((slot = physical_Slot(p)) >= 0)
|
|
if (rad_put_int(rad, RAD_NAS_PORT, slot) != 0) {
|
|
log_Printf(LogERROR, "rad_put: rad_put_int: %s\n", rad_strerror(rad));
|
|
rad_close(rad);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Start an authentication request to the RADIUS server.
|
|
*/
|
|
int
|
|
radius_Authenticate(struct radius *r, struct authinfo *authp, const char *name,
|
|
const char *key, int klen, const char *nchallenge,
|
|
int nclen)
|
|
{
|
|
struct timeval tv;
|
|
int got;
|
|
char hostname[MAXHOSTNAMELEN];
|
|
#if 0
|
|
struct hostent *hp;
|
|
struct in_addr hostaddr;
|
|
#endif
|
|
#ifndef NODES
|
|
struct mschap_response msresp;
|
|
struct mschap2_response msresp2;
|
|
const struct MSCHAPv2_resp *keyv2;
|
|
#endif
|
|
|
|
if (!*r->cfg.file)
|
|
return 0;
|
|
|
|
if (r->cx.fd != -1)
|
|
/*
|
|
* We assume that our name/key/challenge is the same as last time,
|
|
* and just continue to wait for the RADIUS server(s).
|
|
*/
|
|
return 1;
|
|
|
|
radius_Destroy(r);
|
|
|
|
if ((r->cx.rad = rad_auth_open()) == NULL) {
|
|
log_Printf(LogERROR, "rad_auth_open: %s\n", strerror(errno));
|
|
return 0;
|
|
}
|
|
|
|
if (rad_config(r->cx.rad, r->cfg.file) != 0) {
|
|
log_Printf(LogERROR, "rad_config: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return 0;
|
|
}
|
|
|
|
if (rad_create_request(r->cx.rad, RAD_ACCESS_REQUEST) != 0) {
|
|
log_Printf(LogERROR, "rad_create_request: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return 0;
|
|
}
|
|
|
|
if (rad_put_string(r->cx.rad, RAD_USER_NAME, name) != 0 ||
|
|
rad_put_int(r->cx.rad, RAD_SERVICE_TYPE, RAD_FRAMED) != 0 ||
|
|
rad_put_int(r->cx.rad, RAD_FRAMED_PROTOCOL, RAD_PPP) != 0) {
|
|
log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return 0;
|
|
}
|
|
|
|
switch (authp->physical->link.lcp.want_auth) {
|
|
case PROTO_PAP:
|
|
/* We're talking PAP */
|
|
if (rad_put_attr(r->cx.rad, RAD_USER_PASSWORD, key, klen) != 0) {
|
|
log_Printf(LogERROR, "PAP: rad_put_string: %s\n",
|
|
rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return 0;
|
|
}
|
|
break;
|
|
|
|
case PROTO_CHAP:
|
|
switch (authp->physical->link.lcp.want_authtype) {
|
|
case 0x5:
|
|
if (rad_put_attr(r->cx.rad, RAD_CHAP_PASSWORD, key, klen) != 0 ||
|
|
rad_put_attr(r->cx.rad, RAD_CHAP_CHALLENGE, nchallenge, nclen) != 0) {
|
|
log_Printf(LogERROR, "CHAP: rad_put_string: %s\n",
|
|
rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return 0;
|
|
}
|
|
break;
|
|
|
|
#ifndef NODES
|
|
case 0x80:
|
|
if (klen != 50) {
|
|
log_Printf(LogERROR, "CHAP80: Unrecognised key length %d\n", klen);
|
|
rad_close(r->cx.rad);
|
|
return 0;
|
|
}
|
|
|
|
rad_put_vendor_attr(r->cx.rad, RAD_VENDOR_MICROSOFT,
|
|
RAD_MICROSOFT_MS_CHAP_CHALLENGE, nchallenge, nclen);
|
|
msresp.ident = *key;
|
|
msresp.flags = 0x01;
|
|
memcpy(msresp.lm_response, key + 1, 24);
|
|
memcpy(msresp.nt_response, key + 25, 24);
|
|
rad_put_vendor_attr(r->cx.rad, RAD_VENDOR_MICROSOFT,
|
|
RAD_MICROSOFT_MS_CHAP_RESPONSE, &msresp,
|
|
sizeof msresp);
|
|
break;
|
|
|
|
case 0x81:
|
|
if (klen != sizeof(*keyv2) + 1) {
|
|
log_Printf(LogERROR, "CHAP81: Unrecognised key length %d\n", klen);
|
|
rad_close(r->cx.rad);
|
|
return 0;
|
|
}
|
|
|
|
keyv2 = (const struct MSCHAPv2_resp *)(key + 1);
|
|
rad_put_vendor_attr(r->cx.rad, RAD_VENDOR_MICROSOFT,
|
|
RAD_MICROSOFT_MS_CHAP_CHALLENGE, nchallenge, nclen);
|
|
msresp2.ident = *key;
|
|
msresp2.flags = keyv2->Flags;
|
|
memcpy(msresp2.response, keyv2->NTResponse, sizeof msresp2.response);
|
|
memset(msresp2.reserved, '\0', sizeof msresp2.reserved);
|
|
memcpy(msresp2.pchallenge, keyv2->PeerChallenge,
|
|
sizeof msresp2.pchallenge);
|
|
rad_put_vendor_attr(r->cx.rad, RAD_VENDOR_MICROSOFT,
|
|
RAD_MICROSOFT_MS_CHAP2_RESPONSE, &msresp2,
|
|
sizeof msresp2);
|
|
break;
|
|
#endif
|
|
default:
|
|
log_Printf(LogERROR, "CHAP: Unrecognised type 0x%02x\n",
|
|
authp->physical->link.lcp.want_authtype);
|
|
rad_close(r->cx.rad);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (gethostname(hostname, sizeof hostname) != 0)
|
|
log_Printf(LogERROR, "rad_put: gethostname(): %s\n", strerror(errno));
|
|
else {
|
|
#if 0
|
|
if ((hp = gethostbyname(hostname)) != NULL) {
|
|
hostaddr.s_addr = *(u_long *)hp->h_addr;
|
|
if (rad_put_addr(r->cx.rad, RAD_NAS_IP_ADDRESS, hostaddr) != 0) {
|
|
log_Printf(LogERROR, "rad_put: rad_put_string: %s\n",
|
|
rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return 0;
|
|
}
|
|
}
|
|
#endif
|
|
if (rad_put_string(r->cx.rad, RAD_NAS_IDENTIFIER, hostname) != 0) {
|
|
log_Printf(LogERROR, "rad_put: rad_put_string: %s\n",
|
|
rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
radius_put_physical_details(r->cx.rad, authp->physical);
|
|
|
|
r->cx.auth = authp;
|
|
if ((got = rad_init_send_request(r->cx.rad, &r->cx.fd, &tv)))
|
|
radius_Process(r, got);
|
|
else {
|
|
log_Printf(LogPHASE, "Radius: Request sent\n");
|
|
log_Printf(LogDEBUG, "Using radius_Timeout [%p]\n", radius_Timeout);
|
|
r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS;
|
|
r->cx.timer.func = radius_Timeout;
|
|
r->cx.timer.name = "radius auth";
|
|
r->cx.timer.arg = r;
|
|
timer_Start(&r->cx.timer);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Fetch IP, netmask from IPCP */
|
|
void
|
|
radius_Account_Set_Ip(struct radacct *ac, struct in_addr *peer_ip,
|
|
struct in_addr *netmask)
|
|
{
|
|
ac->proto = PROTO_IPCP;
|
|
memcpy(&ac->peer.ip.addr, peer_ip, sizeof(ac->peer.ip.addr));
|
|
memcpy(&ac->peer.ip.mask, netmask, sizeof(ac->peer.ip.mask));
|
|
}
|
|
|
|
#ifndef NOINET6
|
|
/* Fetch interface-id from IPV6CP */
|
|
void
|
|
radius_Account_Set_Ipv6(struct radacct *ac, u_char *ifid)
|
|
{
|
|
ac->proto = PROTO_IPV6CP;
|
|
memcpy(&ac->peer.ipv6.ifid, ifid, sizeof(ac->peer.ipv6.ifid));
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Send an accounting request to the RADIUS server
|
|
*/
|
|
void
|
|
radius_Account(struct radius *r, struct radacct *ac, struct datalink *dl,
|
|
int acct_type, struct pppThroughput *stats)
|
|
{
|
|
struct timeval tv;
|
|
int got;
|
|
char hostname[MAXHOSTNAMELEN];
|
|
#if 0
|
|
struct hostent *hp;
|
|
struct in_addr hostaddr;
|
|
#endif
|
|
|
|
if (!*r->cfg.file)
|
|
return;
|
|
|
|
if (r->cx.fd != -1)
|
|
/*
|
|
* We assume that our name/key/challenge is the same as last time,
|
|
* and just continue to wait for the RADIUS server(s).
|
|
*/
|
|
return;
|
|
|
|
timer_Stop(&r->cx.timer);
|
|
|
|
if ((r->cx.rad = rad_acct_open()) == NULL) {
|
|
log_Printf(LogERROR, "rad_auth_open: %s\n", strerror(errno));
|
|
return;
|
|
}
|
|
|
|
if (rad_config(r->cx.rad, r->cfg.file) != 0) {
|
|
log_Printf(LogERROR, "rad_config: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
|
|
if (rad_create_request(r->cx.rad, RAD_ACCOUNTING_REQUEST) != 0) {
|
|
log_Printf(LogERROR, "rad_create_request: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
|
|
/* Grab some accounting data and initialize structure */
|
|
if (acct_type == RAD_START) {
|
|
ac->rad_parent = r;
|
|
/* Fetch username from datalink */
|
|
strncpy(ac->user_name, dl->peer.authname, sizeof ac->user_name);
|
|
ac->user_name[AUTHLEN-1] = '\0';
|
|
|
|
ac->authentic = 2; /* Assume RADIUS verified auth data */
|
|
|
|
/* Generate a session ID */
|
|
snprintf(ac->session_id, sizeof ac->session_id, "%s%ld-%s%lu",
|
|
dl->bundle->cfg.auth.name, (long)getpid(),
|
|
dl->peer.authname, (unsigned long)stats->uptime);
|
|
|
|
/* And grab our MP socket name */
|
|
snprintf(ac->multi_session_id, sizeof ac->multi_session_id, "%s",
|
|
dl->bundle->ncp.mp.active ?
|
|
dl->bundle->ncp.mp.server.socket.sun_path : "");
|
|
};
|
|
|
|
if (rad_put_string(r->cx.rad, RAD_USER_NAME, ac->user_name) != 0 ||
|
|
rad_put_int(r->cx.rad, RAD_SERVICE_TYPE, RAD_FRAMED) != 0 ||
|
|
rad_put_int(r->cx.rad, RAD_FRAMED_PROTOCOL, RAD_PPP) != 0) {
|
|
log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
switch (ac->proto) {
|
|
case PROTO_IPCP:
|
|
if (rad_put_addr(r->cx.rad, RAD_FRAMED_IP_ADDRESS,
|
|
ac->peer.ip.addr) != 0 || \
|
|
rad_put_addr(r->cx.rad, RAD_FRAMED_IP_NETMASK,
|
|
ac->peer.ip.mask) != 0) {
|
|
log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
break;
|
|
#ifndef NOINET6
|
|
case PROTO_IPV6CP:
|
|
if (rad_put_attr(r->cx.rad, RAD_FRAMED_INTERFACE_ID, ac->peer.ipv6.ifid,
|
|
sizeof(ac->peer.ipv6.ifid)) != 0) {
|
|
log_Printf(LogERROR, "rad_put_attr: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
if (r->ipv6prefix) {
|
|
/*
|
|
* Since PPP doesn't delegate an IPv6 prefix to a peer,
|
|
* Framed-IPv6-Prefix may be not used, actually.
|
|
*/
|
|
if (rad_put_attr(r->cx.rad, RAD_FRAMED_IPV6_PREFIX, r->ipv6prefix,
|
|
sizeof(struct in6_addr) + 2) != 0) {
|
|
log_Printf(LogERROR, "rad_put_attr: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
/* We don't log any protocol specific information */
|
|
break;
|
|
}
|
|
|
|
if (gethostname(hostname, sizeof hostname) != 0)
|
|
log_Printf(LogERROR, "rad_put: gethostname(): %s\n", strerror(errno));
|
|
else {
|
|
#if 0
|
|
if ((hp = gethostbyname(hostname)) != NULL) {
|
|
hostaddr.s_addr = *(u_long *)hp->h_addr;
|
|
if (rad_put_addr(r->cx.rad, RAD_NAS_IP_ADDRESS, hostaddr) != 0) {
|
|
log_Printf(LogERROR, "rad_put: rad_put_string: %s\n",
|
|
rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
if (rad_put_string(r->cx.rad, RAD_NAS_IDENTIFIER, hostname) != 0) {
|
|
log_Printf(LogERROR, "rad_put: rad_put_string: %s\n",
|
|
rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
}
|
|
|
|
radius_put_physical_details(r->cx.rad, dl->physical);
|
|
|
|
if (rad_put_int(r->cx.rad, RAD_ACCT_STATUS_TYPE, acct_type) != 0 ||
|
|
rad_put_string(r->cx.rad, RAD_ACCT_SESSION_ID, ac->session_id) != 0 ||
|
|
rad_put_string(r->cx.rad, RAD_ACCT_MULTI_SESSION_ID,
|
|
ac->multi_session_id) != 0 ||
|
|
rad_put_int(r->cx.rad, RAD_ACCT_DELAY_TIME, 0) != 0) {
|
|
/* XXX ACCT_DELAY_TIME should be increased each time a packet is waiting */
|
|
log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
|
|
if (acct_type == RAD_STOP)
|
|
/* Show some statistics */
|
|
if (rad_put_int(r->cx.rad, RAD_ACCT_INPUT_OCTETS, stats->OctetsIn) != 0 ||
|
|
rad_put_int(r->cx.rad, RAD_ACCT_INPUT_PACKETS, stats->PacketsIn) != 0 ||
|
|
rad_put_int(r->cx.rad, RAD_ACCT_OUTPUT_OCTETS, stats->OctetsOut) != 0 ||
|
|
rad_put_int(r->cx.rad, RAD_ACCT_OUTPUT_PACKETS, stats->PacketsOut)
|
|
!= 0 ||
|
|
rad_put_int(r->cx.rad, RAD_ACCT_SESSION_TIME, throughput_uptime(stats))
|
|
!= 0) {
|
|
log_Printf(LogERROR, "rad_put: %s\n", rad_strerror(r->cx.rad));
|
|
rad_close(r->cx.rad);
|
|
return;
|
|
}
|
|
|
|
r->cx.auth = NULL; /* Not valid for accounting requests */
|
|
if ((got = rad_init_send_request(r->cx.rad, &r->cx.fd, &tv)))
|
|
radius_Process(r, got);
|
|
else {
|
|
log_Printf(LogDEBUG, "Using radius_Timeout [%p]\n", radius_Timeout);
|
|
r->cx.timer.load = tv.tv_usec / TICKUNIT + tv.tv_sec * SECTICKS;
|
|
r->cx.timer.func = radius_Timeout;
|
|
r->cx.timer.name = "radius acct";
|
|
r->cx.timer.arg = r;
|
|
timer_Start(&r->cx.timer);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* How do things look at the moment ?
|
|
*/
|
|
void
|
|
radius_Show(struct radius *r, struct prompt *p)
|
|
{
|
|
prompt_Printf(p, " Radius config: %s",
|
|
*r->cfg.file ? r->cfg.file : "none");
|
|
if (r->valid) {
|
|
prompt_Printf(p, "\n IP: %s\n", inet_ntoa(r->ip));
|
|
prompt_Printf(p, " Netmask: %s\n", inet_ntoa(r->mask));
|
|
prompt_Printf(p, " MTU: %lu\n", r->mtu);
|
|
prompt_Printf(p, " VJ: %sabled\n", r->vj ? "en" : "dis");
|
|
prompt_Printf(p, " Message: %s\n", r->repstr ? r->repstr : "");
|
|
prompt_Printf(p, " MPPE Enc Policy: %s\n",
|
|
radius_policyname(r->mppe.policy));
|
|
prompt_Printf(p, " MPPE Enc Types: %s\n",
|
|
radius_typesname(r->mppe.types));
|
|
prompt_Printf(p, " MPPE Recv Key: %seceived\n",
|
|
r->mppe.recvkey ? "R" : "Not r");
|
|
prompt_Printf(p, " MPPE Send Key: %seceived\n",
|
|
r->mppe.sendkey ? "R" : "Not r");
|
|
prompt_Printf(p, " MS-CHAP2-Response: %s\n",
|
|
r->msrepstr ? r->msrepstr : "");
|
|
prompt_Printf(p, " Error Message: %s\n", r->errstr ? r->errstr : "");
|
|
if (r->routes)
|
|
route_ShowSticky(p, r->routes, " Routes", 16);
|
|
#ifndef NOINET6
|
|
if (r->ipv6routes)
|
|
route_ShowSticky(p, r->ipv6routes, " IPv6 Routes", 16);
|
|
#endif
|
|
} else
|
|
prompt_Printf(p, " (not authenticated)\n");
|
|
}
|