/* $NetBSD: handler.c,v 1.9.6.8 2009/04/20 13:25:27 tteras Exp $ */
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/* Id: handler.c,v 1.28 2006/05/26 12:17:29 manubsd Exp */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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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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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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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#include "config.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <errno.h>
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#include "var.h"
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#include "misc.h"
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#include "vmbuf.h"
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#include "plog.h"
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#include "sockmisc.h"
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#include "debug.h"
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#ifdef ENABLE_HYBRID
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#include <resolv.h>
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#endif
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#include "schedule.h"
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#include "grabmyaddr.h"
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#include "algorithm.h"
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#include "crypto_openssl.h"
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#include "policy.h"
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#include "proposal.h"
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#include "isakmp_var.h"
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#include "evt.h"
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#include "isakmp.h"
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#ifdef ENABLE_HYBRID
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#include "isakmp_xauth.h"
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#include "isakmp_cfg.h"
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#endif
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#include "isakmp_inf.h"
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#include "oakley.h"
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#include "remoteconf.h"
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#include "localconf.h"
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#include "handler.h"
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#include "gcmalloc.h"
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#include "nattraversal.h"
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#include "sainfo.h"
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#ifdef HAVE_GSSAPI
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#include "gssapi.h"
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#endif
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static LIST_HEAD(_ph1tree_, ph1handle) ph1tree;
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static LIST_HEAD(_ph2tree_, ph2handle) ph2tree;
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static LIST_HEAD(_ctdtree_, contacted) ctdtree;
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static LIST_HEAD(_rcptree_, recvdpkt) rcptree;
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static void del_recvdpkt __P((struct recvdpkt *));
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static void rem_recvdpkt __P((struct recvdpkt *));
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static void sweep_recvdpkt __P((void *));
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/*
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* functions about management of the isakmp status table
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*/
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/* %%% management phase 1 handler */
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/*
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* search for isakmpsa handler with isakmp index.
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*/
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extern caddr_t val2str(const char *, size_t);
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struct ph1handle *
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getph1byindex(index)
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isakmp_index *index;
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{
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struct ph1handle *p;
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LIST_FOREACH(p, &ph1tree, chain) {
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if (p->status == PHASE1ST_EXPIRED)
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continue;
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if (memcmp(&p->index, index, sizeof(*index)) == 0)
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return p;
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}
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return NULL;
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}
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/*
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* search for isakmp handler by i_ck in index.
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*/
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struct ph1handle *
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getph1byindex0(index)
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isakmp_index *index;
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{
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struct ph1handle *p;
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LIST_FOREACH(p, &ph1tree, chain) {
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if (p->status == PHASE1ST_EXPIRED)
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continue;
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if (memcmp(&p->index, index, sizeof(cookie_t)) == 0)
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return p;
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}
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return NULL;
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}
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/*
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* search for isakmpsa handler by source and remote address.
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* don't use port number to search because this function search
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* with phase 2's destinaion.
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*/
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struct ph1handle *
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getph1byaddr(local, remote, established)
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struct sockaddr *local, *remote;
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int established;
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{
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struct ph1handle *p;
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plog(LLV_DEBUG2, LOCATION, NULL, "getph1byaddr: start\n");
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plog(LLV_DEBUG2, LOCATION, NULL, "local: %s\n", saddr2str(local));
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plog(LLV_DEBUG2, LOCATION, NULL, "remote: %s\n", saddr2str(remote));
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LIST_FOREACH(p, &ph1tree, chain) {
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if (p->status == PHASE1ST_EXPIRED)
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continue;
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plog(LLV_DEBUG2, LOCATION, NULL, "p->local: %s\n", saddr2str(p->local));
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plog(LLV_DEBUG2, LOCATION, NULL, "p->remote: %s\n", saddr2str(p->remote));
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if(established && p->status != PHASE1ST_ESTABLISHED){
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plog(LLV_DEBUG2, LOCATION, NULL, "status %d, skipping\n", p->status);
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continue;
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}
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if (CMPSADDR(local, p->local) == 0
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&& CMPSADDR(remote, p->remote) == 0){
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plog(LLV_DEBUG2, LOCATION, NULL, "matched\n");
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return p;
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}
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}
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plog(LLV_DEBUG2, LOCATION, NULL, "no match\n");
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return NULL;
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}
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struct ph1handle *
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getph1byaddrwop(local, remote)
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struct sockaddr *local, *remote;
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{
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struct ph1handle *p;
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LIST_FOREACH(p, &ph1tree, chain) {
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if (p->status == PHASE1ST_EXPIRED)
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continue;
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if (cmpsaddrwop(local, p->local) == 0
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&& cmpsaddrwop(remote, p->remote) == 0)
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return p;
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}
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return NULL;
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}
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/*
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* search for isakmpsa handler by remote address.
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* don't use port number to search because this function search
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* with phase 2's destinaion.
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*/
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struct ph1handle *
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getph1bydstaddrwop(remote)
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struct sockaddr *remote;
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{
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struct ph1handle *p;
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LIST_FOREACH(p, &ph1tree, chain) {
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if (p->status == PHASE1ST_EXPIRED)
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continue;
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if (cmpsaddrwop(remote, p->remote) == 0)
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return p;
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}
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return NULL;
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}
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/*
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* dump isakmp-sa
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*/
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vchar_t *
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dumpph1()
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{
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struct ph1handle *iph1;
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struct ph1dump *pd;
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int cnt = 0;
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vchar_t *buf;
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/* get length of buffer */
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LIST_FOREACH(iph1, &ph1tree, chain)
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cnt++;
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buf = vmalloc(cnt * sizeof(struct ph1dump));
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if (buf == NULL) {
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plog(LLV_ERROR, LOCATION, NULL,
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"failed to get buffer\n");
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return NULL;
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}
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pd = (struct ph1dump *)buf->v;
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LIST_FOREACH(iph1, &ph1tree, chain) {
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memcpy(&pd->index, &iph1->index, sizeof(iph1->index));
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pd->status = iph1->status;
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pd->side = iph1->side;
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memcpy(&pd->remote, iph1->remote, sysdep_sa_len(iph1->remote));
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memcpy(&pd->local, iph1->local, sysdep_sa_len(iph1->local));
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pd->version = iph1->version;
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pd->etype = iph1->etype;
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pd->created = iph1->created;
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pd->ph2cnt = iph1->ph2cnt;
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pd++;
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}
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return buf;
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}
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/*
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* create new isakmp Phase 1 status record to handle isakmp in Phase1
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*/
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struct ph1handle *
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newph1()
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{
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struct ph1handle *iph1;
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/* create new iph1 */
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iph1 = racoon_calloc(1, sizeof(*iph1));
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if (iph1 == NULL)
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return NULL;
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iph1->status = PHASE1ST_SPAWN;
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#ifdef ENABLE_DPD
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iph1->dpd_support = 0;
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iph1->dpd_lastack = 0;
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iph1->dpd_seq = 0;
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iph1->dpd_fails = 0;
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iph1->dpd_r_u = NULL;
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#endif
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return iph1;
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}
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/*
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* delete new isakmp Phase 1 status record to handle isakmp in Phase1
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*/
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void
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delph1(iph1)
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struct ph1handle *iph1;
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{
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if (iph1 == NULL)
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return;
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/* SA down shell script hook */
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script_hook(iph1, SCRIPT_PHASE1_DOWN);
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EVT_PUSH(iph1->local, iph1->remote, EVTT_PHASE1_DOWN, NULL);
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#ifdef ENABLE_NATT
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if (iph1->natt_flags & NAT_KA_QUEUED)
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natt_keepalive_remove (iph1->local, iph1->remote);
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if (iph1->natt_options) {
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racoon_free(iph1->natt_options);
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iph1->natt_options = NULL;
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}
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#endif
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#ifdef ENABLE_HYBRID
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if (iph1->mode_cfg)
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isakmp_cfg_rmstate(iph1);
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#endif
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#ifdef ENABLE_DPD
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SCHED_KILL(iph1->dpd_r_u);
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#endif
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if (iph1->remote) {
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racoon_free(iph1->remote);
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iph1->remote = NULL;
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}
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if (iph1->local) {
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racoon_free(iph1->local);
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iph1->local = NULL;
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}
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if (iph1->approval) {
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delisakmpsa(iph1->approval);
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iph1->approval = NULL;
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}
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VPTRINIT(iph1->authstr);
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sched_scrub_param(iph1);
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iph1->sce = NULL;
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iph1->scr = NULL;
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VPTRINIT(iph1->sendbuf);
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VPTRINIT(iph1->dhpriv);
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VPTRINIT(iph1->dhpub);
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VPTRINIT(iph1->dhpub_p);
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VPTRINIT(iph1->dhgxy);
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VPTRINIT(iph1->nonce);
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VPTRINIT(iph1->nonce_p);
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VPTRINIT(iph1->skeyid);
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VPTRINIT(iph1->skeyid_d);
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VPTRINIT(iph1->skeyid_a);
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VPTRINIT(iph1->skeyid_e);
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VPTRINIT(iph1->key);
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VPTRINIT(iph1->hash);
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VPTRINIT(iph1->sig);
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VPTRINIT(iph1->sig_p);
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oakley_delcert(iph1->cert);
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iph1->cert = NULL;
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oakley_delcert(iph1->cert_p);
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iph1->cert_p = NULL;
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oakley_delcert(iph1->crl_p);
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iph1->crl_p = NULL;
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oakley_delcert(iph1->cr_p);
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iph1->cr_p = NULL;
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VPTRINIT(iph1->id);
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VPTRINIT(iph1->id_p);
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if(iph1->approval != NULL)
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delisakmpsa(iph1->approval);
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if (iph1->ivm) {
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oakley_delivm(iph1->ivm);
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iph1->ivm = NULL;
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}
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VPTRINIT(iph1->sa);
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VPTRINIT(iph1->sa_ret);
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#ifdef HAVE_GSSAPI
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VPTRINIT(iph1->gi_i);
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VPTRINIT(iph1->gi_r);
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gssapi_free_state(iph1);
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#endif
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racoon_free(iph1);
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}
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/*
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* create new isakmp Phase 1 status record to handle isakmp in Phase1
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*/
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int
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insph1(iph1)
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struct ph1handle *iph1;
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{
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/* validity check */
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if (iph1->remote == NULL) {
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plog(LLV_ERROR, LOCATION, NULL,
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"invalid isakmp SA handler. no remote address.\n");
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return -1;
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}
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LIST_INSERT_HEAD(&ph1tree, iph1, chain);
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return 0;
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}
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void
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remph1(iph1)
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struct ph1handle *iph1;
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{
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LIST_REMOVE(iph1, chain);
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}
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/*
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* flush isakmp-sa
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*/
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void
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flushph1()
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{
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struct ph1handle *p, *next;
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for (p = LIST_FIRST(&ph1tree); p; p = next) {
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next = LIST_NEXT(p, chain);
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/* send delete information */
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if (p->status == PHASE1ST_ESTABLISHED)
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isakmp_info_send_d1(p);
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remph1(p);
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delph1(p);
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}
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}
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void
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initph1tree()
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{
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LIST_INIT(&ph1tree);
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}
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/* %%% management phase 2 handler */
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/*
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* search ph2handle with policy id.
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*/
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struct ph2handle *
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getph2byspid(spid)
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u_int32_t spid;
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{
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struct ph2handle *p;
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LIST_FOREACH(p, &ph2tree, chain) {
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/*
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* there are ph2handle independent on policy
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* such like informational exchange.
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*/
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if (p->spid == spid)
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return p;
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}
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return NULL;
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}
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/*
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* search ph2handle with sequence number.
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*/
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struct ph2handle *
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getph2byseq(seq)
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u_int32_t seq;
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{
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struct ph2handle *p;
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LIST_FOREACH(p, &ph2tree, chain) {
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if (p->seq == seq)
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return p;
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}
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return NULL;
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}
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/*
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* search ph2handle with message id.
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*/
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struct ph2handle *
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getph2bymsgid(iph1, msgid)
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struct ph1handle *iph1;
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u_int32_t msgid;
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{
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struct ph2handle *p;
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LIST_FOREACH(p, &ph2tree, chain) {
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if (p->msgid == msgid && p->ph1 == iph1)
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return p;
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}
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return NULL;
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}
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struct ph2handle *
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getph2byid(src, dst, spid)
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struct sockaddr *src, *dst;
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u_int32_t spid;
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{
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struct ph2handle *p;
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LIST_FOREACH(p, &ph2tree, chain) {
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if (spid == p->spid &&
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CMPSADDR(src, p->src) == 0 &&
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CMPSADDR(dst, p->dst) == 0){
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/* Sanity check to detect zombie handlers
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* XXX Sould be done "somewhere" more interesting,
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* because we have lots of getph2byxxxx(), but this one
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* is called by pk_recvacquire(), so is the most important.
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*/
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if(p->status < PHASE2ST_ESTABLISHED &&
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p->retry_counter == 0
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&& p->sce == NULL && p->scr == NULL){
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plog(LLV_DEBUG, LOCATION, NULL,
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"Zombie ph2 found, expiring it\n");
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isakmp_ph2expire(p);
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}else
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return p;
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}
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}
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return NULL;
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}
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struct ph2handle *
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getph2bysaddr(src, dst)
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struct sockaddr *src, *dst;
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{
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struct ph2handle *p;
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LIST_FOREACH(p, &ph2tree, chain) {
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if (cmpsaddrstrict(src, p->src) == 0 &&
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cmpsaddrstrict(dst, p->dst) == 0)
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return p;
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}
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return NULL;
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}
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/*
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* call by pk_recvexpire().
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*/
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struct ph2handle *
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getph2bysaidx(src, dst, proto_id, spi)
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struct sockaddr *src, *dst;
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u_int proto_id;
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u_int32_t spi;
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{
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struct ph2handle *iph2;
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struct saproto *pr;
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LIST_FOREACH(iph2, &ph2tree, chain) {
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if (iph2->proposal == NULL && iph2->approval == NULL)
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continue;
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if (iph2->approval != NULL) {
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for (pr = iph2->approval->head; pr != NULL;
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pr = pr->next) {
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if (proto_id != pr->proto_id)
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break;
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if (spi == pr->spi || spi == pr->spi_p)
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return iph2;
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}
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} else if (iph2->proposal != NULL) {
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for (pr = iph2->proposal->head; pr != NULL;
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pr = pr->next) {
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if (proto_id != pr->proto_id)
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break;
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if (spi == pr->spi)
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return iph2;
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}
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}
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}
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return NULL;
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}
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/*
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* create new isakmp Phase 2 status record to handle isakmp in Phase2
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*/
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struct ph2handle *
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newph2()
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{
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struct ph2handle *iph2 = NULL;
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/* create new iph2 */
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iph2 = racoon_calloc(1, sizeof(*iph2));
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if (iph2 == NULL)
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return NULL;
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iph2->status = PHASE1ST_SPAWN;
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return iph2;
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}
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/*
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* initialize ph2handle
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* NOTE: don't initialize src/dst.
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* SPI in the proposal is cleared.
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*/
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void
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initph2(iph2)
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struct ph2handle *iph2;
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{
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sched_scrub_param(iph2);
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iph2->sce = NULL;
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iph2->scr = NULL;
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VPTRINIT(iph2->sendbuf);
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VPTRINIT(iph2->msg1);
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/* clear spi, keep variables in the proposal */
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if (iph2->proposal) {
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struct saproto *pr;
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for (pr = iph2->proposal->head; pr != NULL; pr = pr->next)
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pr->spi = 0;
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}
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/* clear approval */
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if (iph2->approval) {
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flushsaprop(iph2->approval);
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iph2->approval = NULL;
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}
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/* clear the generated policy */
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if (iph2->spidx_gen) {
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delsp_bothdir((struct policyindex *)iph2->spidx_gen);
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racoon_free(iph2->spidx_gen);
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iph2->spidx_gen = NULL;
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}
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if (iph2->pfsgrp) {
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oakley_dhgrp_free(iph2->pfsgrp);
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iph2->pfsgrp = NULL;
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}
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VPTRINIT(iph2->dhpriv);
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VPTRINIT(iph2->dhpub);
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VPTRINIT(iph2->dhpub_p);
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VPTRINIT(iph2->dhgxy);
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VPTRINIT(iph2->id);
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VPTRINIT(iph2->id_p);
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VPTRINIT(iph2->nonce);
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VPTRINIT(iph2->nonce_p);
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VPTRINIT(iph2->sa);
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VPTRINIT(iph2->sa_ret);
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if (iph2->ivm) {
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oakley_delivm(iph2->ivm);
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iph2->ivm = NULL;
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}
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}
|
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/*
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* delete new isakmp Phase 2 status record to handle isakmp in Phase2
|
*/
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void
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delph2(iph2)
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struct ph2handle *iph2;
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{
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initph2(iph2);
|
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if (iph2->src) {
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racoon_free(iph2->src);
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iph2->src = NULL;
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}
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if (iph2->dst) {
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racoon_free(iph2->dst);
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iph2->dst = NULL;
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}
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if (iph2->src_id) {
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racoon_free(iph2->src_id);
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iph2->src_id = NULL;
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}
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if (iph2->dst_id) {
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racoon_free(iph2->dst_id);
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iph2->dst_id = NULL;
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}
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if (iph2->proposal) {
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flushsaprop(iph2->proposal);
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iph2->proposal = NULL;
|
}
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racoon_free(iph2);
|
}
|
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/*
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* create new isakmp Phase 2 status record to handle isakmp in Phase2
|
*/
|
int
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insph2(iph2)
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struct ph2handle *iph2;
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{
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LIST_INSERT_HEAD(&ph2tree, iph2, chain);
|
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return 0;
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}
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void
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remph2(iph2)
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struct ph2handle *iph2;
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{
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LIST_REMOVE(iph2, chain);
|
}
|
|
void
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initph2tree()
|
{
|
LIST_INIT(&ph2tree);
|
}
|
|
void
|
flushph2()
|
{
|
struct ph2handle *p, *next;
|
|
plog(LLV_DEBUG2, LOCATION, NULL,
|
"flushing all ph2 handlers...\n");
|
|
for (p = LIST_FIRST(&ph2tree); p; p = next) {
|
next = LIST_NEXT(p, chain);
|
|
/* send delete information */
|
if (p->status == PHASE2ST_ESTABLISHED){
|
plog(LLV_DEBUG2, LOCATION, NULL,
|
"got a ph2 handler to flush...\n");
|
isakmp_info_send_d2(p);
|
}else{
|
plog(LLV_DEBUG2, LOCATION, NULL,
|
"skipping ph2 handler (state %d)\n", p->status);
|
}
|
|
delete_spd(p, 0);
|
unbindph12(p);
|
remph2(p);
|
delph2(p);
|
}
|
}
|
|
/*
|
* Delete all Phase 2 handlers for this src/dst/proto. This
|
* is used during INITIAL-CONTACT processing (so no need to
|
* send a message to the peer).
|
*/
|
void
|
deleteallph2(src, dst, proto_id)
|
struct sockaddr *src, *dst;
|
u_int proto_id;
|
{
|
struct ph2handle *iph2, *next;
|
struct saproto *pr;
|
|
for (iph2 = LIST_FIRST(&ph2tree); iph2 != NULL; iph2 = next) {
|
next = LIST_NEXT(iph2, chain);
|
if (iph2->proposal == NULL && iph2->approval == NULL)
|
continue;
|
if (iph2->approval != NULL) {
|
for (pr = iph2->approval->head; pr != NULL;
|
pr = pr->next) {
|
if (proto_id == pr->proto_id)
|
goto zap_it;
|
}
|
} else if (iph2->proposal != NULL) {
|
for (pr = iph2->proposal->head; pr != NULL;
|
pr = pr->next) {
|
if (proto_id == pr->proto_id)
|
goto zap_it;
|
}
|
}
|
continue;
|
zap_it:
|
unbindph12(iph2);
|
remph2(iph2);
|
delph2(iph2);
|
}
|
}
|
|
/* %%% */
|
void
|
bindph12(iph1, iph2)
|
struct ph1handle *iph1;
|
struct ph2handle *iph2;
|
{
|
iph2->ph1 = iph1;
|
LIST_INSERT_HEAD(&iph1->ph2tree, iph2, ph1bind);
|
}
|
|
void
|
unbindph12(iph2)
|
struct ph2handle *iph2;
|
{
|
if (iph2->ph1 != NULL) {
|
iph2->ph1 = NULL;
|
LIST_REMOVE(iph2, ph1bind);
|
}
|
}
|
|
/* %%% management contacted list */
|
/*
|
* search contacted list.
|
*/
|
struct contacted *
|
getcontacted(remote)
|
struct sockaddr *remote;
|
{
|
struct contacted *p;
|
|
LIST_FOREACH(p, &ctdtree, chain) {
|
if (cmpsaddrstrict(remote, p->remote) == 0)
|
return p;
|
}
|
|
return NULL;
|
}
|
|
/*
|
* create new isakmp Phase 2 status record to handle isakmp in Phase2
|
*/
|
int
|
inscontacted(remote)
|
struct sockaddr *remote;
|
{
|
struct contacted *new;
|
|
/* create new iph2 */
|
new = racoon_calloc(1, sizeof(*new));
|
if (new == NULL)
|
return -1;
|
|
new->remote = dupsaddr(remote);
|
if (new->remote == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"failed to allocate buffer.\n");
|
racoon_free(new);
|
return -1;
|
}
|
|
LIST_INSERT_HEAD(&ctdtree, new, chain);
|
|
return 0;
|
}
|
|
void
|
initctdtree()
|
{
|
LIST_INIT(&ctdtree);
|
}
|
|
/*
|
* check the response has been sent to the peer. when not, simply reply
|
* the buffered packet to the peer.
|
* OUT:
|
* 0: the packet is received at the first time.
|
* 1: the packet was processed before.
|
* 2: the packet was processed before, but the address mismatches.
|
* -1: error happened.
|
*/
|
int
|
check_recvdpkt(remote, local, rbuf)
|
struct sockaddr *remote, *local;
|
vchar_t *rbuf;
|
{
|
vchar_t *hash;
|
struct recvdpkt *r;
|
time_t t;
|
int len, s;
|
|
/* set current time */
|
t = time(NULL);
|
|
hash = eay_md5_one(rbuf);
|
if (!hash) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"failed to allocate buffer.\n");
|
return -1;
|
}
|
|
LIST_FOREACH(r, &rcptree, chain) {
|
if (memcmp(hash->v, r->hash->v, r->hash->l) == 0)
|
break;
|
}
|
vfree(hash);
|
|
/* this is the first time to receive the packet */
|
if (r == NULL)
|
return 0;
|
|
/*
|
* the packet was processed before, but the remote address mismatches.
|
*/
|
if (cmpsaddrstrict(remote, r->remote) != 0)
|
return 2;
|
|
/*
|
* it should not check the local address because the packet
|
* may arrive at other interface.
|
*/
|
|
/* check the previous time to send */
|
if (t - r->time_send < 1) {
|
plog(LLV_WARNING, LOCATION, NULL,
|
"the packet retransmitted in a short time from %s\n",
|
saddr2str(remote));
|
/*XXX should it be error ? */
|
}
|
|
/* select the socket to be sent */
|
s = getsockmyaddr(r->local);
|
if (s == -1)
|
return -1;
|
|
/* resend the packet if needed */
|
len = sendfromto(s, r->sendbuf->v, r->sendbuf->l,
|
r->local, r->remote, lcconf->count_persend);
|
if (len == -1) {
|
plog(LLV_ERROR, LOCATION, NULL, "sendfromto failed\n");
|
return -1;
|
}
|
|
/* check the retry counter */
|
r->retry_counter--;
|
if (r->retry_counter <= 0) {
|
rem_recvdpkt(r);
|
del_recvdpkt(r);
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"deleted the retransmission packet to %s.\n",
|
saddr2str(remote));
|
} else
|
r->time_send = t;
|
|
return 1;
|
}
|
|
/*
|
* adding a hash of received packet into the received list.
|
*/
|
int
|
add_recvdpkt(remote, local, sbuf, rbuf)
|
struct sockaddr *remote, *local;
|
vchar_t *sbuf, *rbuf;
|
{
|
struct recvdpkt *new = NULL;
|
|
if (lcconf->retry_counter == 0) {
|
/* no need to add it */
|
return 0;
|
}
|
|
new = racoon_calloc(1, sizeof(*new));
|
if (!new) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"failed to allocate buffer.\n");
|
return -1;
|
}
|
|
new->hash = eay_md5_one(rbuf);
|
if (!new->hash) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"failed to allocate buffer.\n");
|
del_recvdpkt(new);
|
return -1;
|
}
|
new->remote = dupsaddr(remote);
|
if (new->remote == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"failed to allocate buffer.\n");
|
del_recvdpkt(new);
|
return -1;
|
}
|
new->local = dupsaddr(local);
|
if (new->local == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"failed to allocate buffer.\n");
|
del_recvdpkt(new);
|
return -1;
|
}
|
new->sendbuf = vdup(sbuf);
|
if (new->sendbuf == NULL) {
|
plog(LLV_ERROR, LOCATION, NULL,
|
"failed to allocate buffer.\n");
|
del_recvdpkt(new);
|
return -1;
|
}
|
|
new->retry_counter = lcconf->retry_counter;
|
new->time_send = 0;
|
new->created = time(NULL);
|
|
LIST_INSERT_HEAD(&rcptree, new, chain);
|
|
return 0;
|
}
|
|
void
|
del_recvdpkt(r)
|
struct recvdpkt *r;
|
{
|
if (r->remote)
|
racoon_free(r->remote);
|
if (r->local)
|
racoon_free(r->local);
|
if (r->hash)
|
vfree(r->hash);
|
if (r->sendbuf)
|
vfree(r->sendbuf);
|
racoon_free(r);
|
}
|
|
void
|
rem_recvdpkt(r)
|
struct recvdpkt *r;
|
{
|
LIST_REMOVE(r, chain);
|
}
|
|
void
|
sweep_recvdpkt(dummy)
|
void *dummy;
|
{
|
struct recvdpkt *r, *next;
|
time_t t, lt;
|
|
/* set current time */
|
t = time(NULL);
|
|
/* set the lifetime of the retransmission */
|
lt = lcconf->retry_counter * lcconf->retry_interval;
|
|
for (r = LIST_FIRST(&rcptree); r; r = next) {
|
next = LIST_NEXT(r, chain);
|
|
if (t - r->created > lt) {
|
rem_recvdpkt(r);
|
del_recvdpkt(r);
|
}
|
}
|
|
sched_new(lt, sweep_recvdpkt, NULL);
|
}
|
|
void
|
init_recvdpkt()
|
{
|
time_t lt = lcconf->retry_counter * lcconf->retry_interval;
|
|
LIST_INIT(&rcptree);
|
|
sched_new(lt, sweep_recvdpkt, NULL);
|
}
|
|
#ifdef ENABLE_HYBRID
|
/*
|
* Retruns 0 if the address was obtained by ISAKMP mode config, 1 otherwise
|
* This should be in isakmp_cfg.c but ph1tree being private, it must be there
|
*/
|
int
|
exclude_cfg_addr(addr)
|
const struct sockaddr *addr;
|
{
|
struct ph1handle *p;
|
struct sockaddr_in *sin;
|
|
LIST_FOREACH(p, &ph1tree, chain) {
|
if ((p->mode_cfg != NULL) &&
|
(p->mode_cfg->flags & ISAKMP_CFG_GOT_ADDR4) &&
|
(addr->sa_family == AF_INET)) {
|
sin = (struct sockaddr_in *)addr;
|
if (sin->sin_addr.s_addr == p->mode_cfg->addr4.s_addr)
|
return 0;
|
}
|
}
|
|
return 1;
|
}
|
#endif
|
|
|
|
/*
|
* Reload conf code
|
*/
|
static int revalidate_ph2(struct ph2handle *iph2){
|
struct sainfoalg *alg;
|
int found, check_level;
|
struct sainfo *sainfo;
|
struct saprop *approval;
|
struct ph1handle *iph1;
|
|
/*
|
* Get the new sainfo using values of the old one
|
*/
|
if (iph2->sainfo != NULL) {
|
iph2->sainfo = getsainfo(iph2->sainfo->idsrc,
|
iph2->sainfo->iddst, iph2->sainfo->id_i,
|
iph2->sainfo->remoteid);
|
}
|
approval = iph2->approval;
|
sainfo = iph2->sainfo;
|
|
if (sainfo == NULL) {
|
/*
|
* Sainfo has been removed
|
*/
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: No sainfo for ph2\n");
|
return 0;
|
}
|
|
if (approval == NULL) {
|
/*
|
* XXX why do we have a NULL approval sometimes ???
|
*/
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"No approval found !\n");
|
return 0;
|
}
|
|
/*
|
* Don't care about proposals, should we do something ?
|
* We have to keep iph2->proposal valid at least for initiator,
|
* for pk_sendgetspi()
|
*/
|
|
plog(LLV_DEBUG, LOCATION, NULL, "active single bundle:\n");
|
printsaprop0(LLV_DEBUG, approval);
|
|
/*
|
* Validate approval against sainfo
|
* Note: we must have an updated ph1->rmconf before doing that,
|
* we'll set check_level to EXACT if we don't have a ph1
|
* XXX try tu find the new remote section to get the new check level ?
|
* XXX lifebyte
|
*/
|
if (iph2->ph1 != NULL)
|
iph1=iph2->ph1;
|
else
|
iph1=getph1byaddr(iph2->src, iph2->dst, 0);
|
|
if(iph1 != NULL && iph1->rmconf != NULL) {
|
check_level = iph1->rmconf->pcheck_level;
|
} else {
|
if(iph1 != NULL)
|
plog(LLV_DEBUG, LOCATION, NULL, "No phase1 rmconf found !\n");
|
else
|
plog(LLV_DEBUG, LOCATION, NULL, "No phase1 found !\n");
|
check_level = PROP_CHECK_EXACT;
|
}
|
|
switch (check_level) {
|
case PROP_CHECK_OBEY:
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: OBEY for ph2, ok\n");
|
return 1;
|
break;
|
|
case PROP_CHECK_STRICT:
|
/* FALLTHROUGH */
|
case PROP_CHECK_CLAIM:
|
if (sainfo->lifetime < approval->lifetime) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: lifetime mismatch\n");
|
return 0;
|
}
|
|
#if 0
|
/* Lifebyte is deprecated, just ignore it
|
*/
|
if (sainfo->lifebyte < approval->lifebyte) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: lifebyte mismatch\n");
|
return 0;
|
}
|
#endif
|
|
if (sainfo->pfs_group &&
|
sainfo->pfs_group != approval->pfs_group) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: PFS group mismatch\n");
|
return 0;
|
}
|
break;
|
|
case PROP_CHECK_EXACT:
|
if (sainfo->lifetime != approval->lifetime ||
|
#if 0
|
/* Lifebyte is deprecated, just ignore it
|
*/
|
sainfo->lifebyte != approval->lifebyte ||
|
#endif
|
sainfo->pfs_group != iph2->approval->pfs_group) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: lifetime | pfs mismatch\n");
|
return 0;
|
}
|
break;
|
|
default:
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: Shouldn't be here !\n");
|
return 0;
|
break;
|
}
|
|
for (alg = sainfo->algs[algclass_ipsec_auth]; alg; alg = alg->next) {
|
if (alg->alg == approval->head->head->authtype)
|
break;
|
}
|
if (alg == NULL) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: alg == NULL (auth)\n");
|
return 0;
|
}
|
|
found = 0;
|
for (alg = sainfo->algs[algclass_ipsec_enc];
|
(found == 0 && alg != NULL); alg = alg->next) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: next ph2 enc alg...\n");
|
|
if (alg->alg != approval->head->head->trns_id){
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: encmode mismatch (%d / %d)\n",
|
alg->alg, approval->head->head->trns_id);
|
continue;
|
}
|
|
switch (check_level){
|
/* PROP_CHECK_STRICT cannot happen here */
|
case PROP_CHECK_EXACT:
|
if (alg->encklen != approval->head->head->encklen) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: enclen mismatch\n");
|
continue;
|
}
|
break;
|
|
case PROP_CHECK_CLAIM:
|
/* FALLTHROUGH */
|
case PROP_CHECK_STRICT:
|
if (alg->encklen > approval->head->head->encklen) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: enclen mismatch\n");
|
continue;
|
}
|
break;
|
|
default:
|
plog(LLV_ERROR, LOCATION, NULL,
|
"unexpected check_level\n");
|
continue;
|
break;
|
}
|
found = 1;
|
}
|
|
if (!found){
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: No valid enc\n");
|
return 0;
|
}
|
|
/*
|
* XXX comp
|
*/
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: ph2 check ok\n");
|
|
return 1;
|
}
|
|
|
static void
|
remove_ph2(struct ph2handle *iph2)
|
{
|
u_int32_t spis[2];
|
|
if(iph2 == NULL)
|
return;
|
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Deleting a Ph2...\n");
|
|
if (iph2->status == PHASE2ST_ESTABLISHED)
|
isakmp_info_send_d2(iph2);
|
|
if(iph2->approval != NULL && iph2->approval->head != NULL){
|
spis[0]=iph2->approval->head->spi;
|
spis[1]=iph2->approval->head->spi_p;
|
|
/* purge_ipsec_spi() will do all the work:
|
* - delete SPIs in kernel
|
* - delete generated SPD
|
* - unbind / rem / del ph2
|
*/
|
purge_ipsec_spi(iph2->dst, iph2->approval->head->proto_id,
|
spis, 2);
|
}else{
|
unbindph12(iph2);
|
remph2(iph2);
|
delph2(iph2);
|
}
|
}
|
|
static void remove_ph1(struct ph1handle *iph1){
|
struct ph2handle *iph2, *iph2_next;
|
|
if(iph1 == NULL)
|
return;
|
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Removing PH1...\n");
|
|
if (iph1->status == PHASE1ST_ESTABLISHED){
|
for (iph2 = LIST_FIRST(&iph1->ph2tree); iph2; iph2 = iph2_next) {
|
iph2_next = LIST_NEXT(iph2, chain);
|
remove_ph2(iph2);
|
}
|
isakmp_info_send_d1(iph1);
|
}
|
iph1->status = PHASE1ST_EXPIRED;
|
iph1->sce = sched_new(1, isakmp_ph1delete_stub, iph1);
|
}
|
|
|
static int revalidate_ph1tree_rmconf(void){
|
struct ph1handle *p, *next;
|
struct remoteconf *newrmconf;
|
|
for (p = LIST_FIRST(&ph1tree); p; p = next) {
|
next = LIST_NEXT(p, chain);
|
|
if (p->status == PHASE1ST_EXPIRED)
|
continue;
|
|
newrmconf=getrmconf(p->remote);
|
if(newrmconf == NULL){
|
p->rmconf = NULL;
|
remove_ph1(p);
|
}else{
|
/* Do not free old rmconf, it is just a pointer to an entry in rmtree
|
*/
|
p->rmconf=newrmconf;
|
if(p->approval != NULL){
|
struct isakmpsa *tmpsa;
|
|
tmpsa=dupisakmpsa(p->approval);
|
if(tmpsa != NULL){
|
delisakmpsa(p->approval);
|
p->approval=tmpsa;
|
p->approval->rmconf=newrmconf;
|
}
|
}
|
}
|
}
|
|
return 1;
|
}
|
|
|
/* rmconf is already updated here
|
*/
|
static int revalidate_ph1(struct ph1handle *iph1){
|
struct isakmpsa *p, *approval;
|
struct etypes *e;
|
|
if(iph1 == NULL ||
|
iph1->approval == NULL ||
|
iph1->rmconf == NULL)
|
return 0;
|
|
approval=iph1->approval;
|
|
for (e = iph1->rmconf->etypes; e != NULL; e = e->next){
|
if (iph1->etype == e->type)
|
break;
|
}
|
|
if (e == NULL){
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: Exchange type mismatch\n");
|
return 0;
|
}
|
|
if (iph1->etype == ISAKMP_ETYPE_AGG &&
|
approval->dh_group != iph1->rmconf->dh_group){
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: DH mismatch\n");
|
return 0;
|
}
|
|
for (p=iph1->rmconf->proposal; p != NULL; p=p->next){
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: Trying next proposal...\n");
|
|
if(approval->authmethod != p->authmethod){
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: Authmethod mismatch\n");
|
continue;
|
}
|
|
if(approval->enctype != p->enctype){
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: enctype mismatch\n");
|
continue;
|
}
|
|
switch (iph1->rmconf->pcheck_level) {
|
case PROP_CHECK_OBEY:
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: OBEY pcheck level, ok...\n");
|
return 1;
|
break;
|
|
case PROP_CHECK_CLAIM:
|
/* FALLTHROUGH */
|
case PROP_CHECK_STRICT:
|
if (approval->encklen < p->encklen) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: encklen mismatch\n");
|
continue;
|
}
|
|
if (approval->lifetime > p->lifetime) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: lifetime mismatch\n");
|
continue;
|
}
|
|
#if 0
|
/* Lifebyte is deprecated, just ignore it
|
*/
|
if (approval->lifebyte > p->lifebyte) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: lifebyte mismatch\n");
|
continue;
|
}
|
#endif
|
break;
|
|
case PROP_CHECK_EXACT:
|
if (approval->encklen != p->encklen) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: encklen mismatch\n");
|
continue;
|
}
|
|
if (approval->lifetime != p->lifetime) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: lifetime mismatch\n");
|
continue;
|
}
|
|
#if 0
|
/* Lifebyte is deprecated, just ignore it
|
*/
|
if (approval->lifebyte != p->lifebyte) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: lifebyte mismatch\n");
|
continue;
|
}
|
#endif
|
break;
|
|
default:
|
plog(LLV_ERROR, LOCATION, NULL,
|
"unexpected check_level\n");
|
continue;
|
break;
|
}
|
|
if (approval->hashtype != p->hashtype) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: hashtype mismatch\n");
|
continue;
|
}
|
|
if (iph1->etype != ISAKMP_ETYPE_AGG &&
|
approval->dh_group != p->dh_group) {
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"Reload: dhgroup mismatch\n");
|
continue;
|
}
|
|
plog(LLV_DEBUG, LOCATION, NULL, "Reload: Conf ok\n");
|
return 1;
|
}
|
|
plog(LLV_DEBUG, LOCATION, NULL, "Reload: No valid conf found\n");
|
return 0;
|
}
|
|
|
static int revalidate_ph1tree(void){
|
struct ph1handle *p, *next;
|
|
for (p = LIST_FIRST(&ph1tree); p; p = next) {
|
next = LIST_NEXT(p, chain);
|
|
if (p->status == PHASE1ST_EXPIRED)
|
continue;
|
|
if(!revalidate_ph1(p))
|
remove_ph1(p);
|
}
|
|
return 1;
|
}
|
|
static int revalidate_ph2tree(void){
|
struct ph2handle *p, *next;
|
|
for (p = LIST_FIRST(&ph2tree); p; p = next) {
|
next = LIST_NEXT(p, chain);
|
|
if (p->status == PHASE2ST_EXPIRED)
|
continue;
|
|
if(!revalidate_ph2(p)){
|
plog(LLV_DEBUG, LOCATION, NULL,
|
"PH2 not validated, removing it\n");
|
remove_ph2(p);
|
}
|
}
|
|
return 1;
|
}
|
|
int
|
revalidate_ph12(void)
|
{
|
|
revalidate_ph1tree_rmconf();
|
|
revalidate_ph2tree();
|
revalidate_ph1tree();
|
|
return 1;
|
}
|
|
#ifdef ENABLE_HYBRID
|
struct ph1handle *
|
getph1bylogin(login)
|
char *login;
|
{
|
struct ph1handle *p;
|
|
LIST_FOREACH(p, &ph1tree, chain) {
|
if (p->mode_cfg == NULL)
|
continue;
|
if (strncmp(p->mode_cfg->login, login, LOGINLEN) == 0)
|
return p;
|
}
|
|
return NULL;
|
}
|
|
int
|
purgeph1bylogin(login)
|
char *login;
|
{
|
struct ph1handle *p;
|
int found = 0;
|
|
LIST_FOREACH(p, &ph1tree, chain) {
|
if (p->mode_cfg == NULL)
|
continue;
|
if (strncmp(p->mode_cfg->login, login, LOGINLEN) == 0) {
|
if (p->status == PHASE1ST_ESTABLISHED)
|
isakmp_info_send_d1(p);
|
purge_remote(p);
|
found++;
|
}
|
}
|
|
return found;
|
}
|
#endif
|
