+++ /dev/null
-/* $KAME: mip6_hooks.c,v 1.8 2000/03/25 07:23:51 sumikawa Exp $ */
-
-/*
- * Copyright (C) 1995, 1996, 1997, 1998, 1999 and 2000 WIDE Project.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the project nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-/*
- * Copyright (c) 1999 and 2000 Ericsson Radio Systems AB
- * All rights reserved.
- *
- * Author: Mattias Pettersson <mattias.pettersson@era.ericsson.se>
- * Hesham Soliman <hesham.soliman@ericsson.com.au>
- * Martti Kuparinen <martti.kuparinen@ericsson.com>
- *
- */
-#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__)
-#include "opt_inet.h"
-#endif
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/malloc.h>
-#include <sys/proc.h>
-#include <sys/mbuf.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/kernel.h>
-#include <net/if.h>
-#include <net/if_types.h>
-#include <netinet/in.h>
-#include <netinet/in_var.h>
-#include <netinet/ip6.h>
-#include <netinet6/ip6_var.h>
-#include <netinet6/nd6.h>
-#include <netinet6/mip6.h>
-#include <netinet6/mip6_common.h>
-
-/*
- * These are defined in sys/netinet6/
- */
-extern int (*mip6_store_dstopt_pre_hook)(struct mbuf *, u_int8_t *,
- u_int8_t, u_int8_t);
-extern int (*mip6_rec_ctrl_sig_hook)(struct mbuf *, int);
-extern int (*mip6_new_packet_hook)(struct mbuf *);
-extern int (*mip6_icmp6_input_hook)(struct mbuf *, int);
-extern int (*mip6_output_hook)(struct mbuf *, struct ip6_pktopts **);
-extern int (*mip6_rec_ra_hook)(struct mbuf *, int);
-
-/* Home Agent-specific hooks */
-extern struct in6_addr * (*mip6_global_addr_hook)(struct in6_addr *);
-extern struct mip6_subopt_hal * (*mip6_hal_dynamic_hook)(struct in6_addr *);
-extern int (*mip6_write_config_data_ha_hook)(u_long, void *);
-extern int (*mip6_clear_config_data_ha_hook)(u_long, void *);
-extern int (*mip6_enable_func_ha_hook)(u_long, caddr_t);
-extern void (*mip6_icmp6_output_hook)(struct mbuf *);
-
-/* Mobile Node-specific hooks */
-extern int (*mip6_route_optimize_hook)(struct mbuf *);
-extern void (*mip6_select_defrtr_hook)(void);
-extern struct nd_prefix * (*mip6_get_home_prefix_hook)(void);
-extern void (*mip6_prelist_update_hook)(struct nd_prefix *,
- struct nd_defrouter *);
-extern void (*mip6_expired_defrouter_hook)(struct nd_defrouter *);
-extern void (*mip6_probe_pfxrtrs_hook)(void);
-extern void (*mip6_store_advint_hook)(struct nd_opt_advint *,
- struct nd_defrouter *);
-extern int (*mip6_get_md_state_hook)(void);
-extern int (*mip6_rec_ba_hook)(struct mbuf *, int);
-extern int (*mip6_rec_br_hook)(struct mbuf *, int);
-extern void (*mip6_stop_bu_hook)(struct in6_addr *);
-extern int (*mip6_write_config_data_mn_hook)(u_long, void *);
-extern int (*mip6_clear_config_data_mn_hook)(u_long, caddr_t);
-extern int (*mip6_enable_func_mn_hook)(u_long, caddr_t);
-extern void (*mip6_minus_a_case_hook)(struct nd_prefix *);
-extern struct mip6_esm * (*mip6_esm_find_hook)(struct in6_addr *);
-
-
-void
-mip6_minus_a_case(struct nd_prefix *pr)
-{
- struct in6_addr addr;
-
- if (IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr) ||
- IN6_IS_ADDR_MULTICAST(&pr->ndpr_addr) ||
- IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_addr)) {
- return;
- }
-
- addr = in6addr_any;
- mip6_esm_create(pr->ndpr_ifp, NULL, &addr, &pr->ndpr_addr,
- pr->ndpr_plen, MIP6_STATE_UNDEF, PERMANENT, 0xFFFF);
-#if MIP6_DEBUG
- mip6_debug("Late Home Address %s found for autoconfig'd case. Starting"
- " Mobile IPv6.\n", ip6_sprintf(&pr->ndpr_addr));
-#endif
- mip6_minus_a_case_hook = 0;
- mip6_enable_hooks(MIP6_SPECIFIC_HOOKS);
- mip6_md_init();
-}
-
-struct nd_prefix *
-mip6_find_auto_home_addr(void)
-{
- struct nd_prefix *pr;
-#if 0
- struct in6_ifaddr *ia6;
-#endif
-
- for (pr = nd_prefix.lh_first; pr; pr = pr->ndpr_next) {
-#if MIP6_DEBUG
- mip6_debug("%s: scanning prefix %s (pr = %p)\n", __FUNCTION__,
- ip6_sprintf(&pr->ndpr_prefix.sin6_addr), pr);
-#endif
- if (IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr) ||
- IN6_IS_ADDR_MULTICAST(&pr->ndpr_addr) ||
- IN6_IS_ADDR_LINKLOCAL(&pr->ndpr_addr)) {
- continue;
- }
-#if 0
- ia6 = in6ifa_ifpwithaddr(pr->ndpr_ifp, &pr->ndpr_addr);
- if (ia6 && (ia6->ia6_flags | IN6_IFF_DETACHED))
- continue;
- else
- break; /* XXXYYY Remove in v2.0. */
-#else
-#if MIP6_DEBUG
- mip6_debug("%s: skipping detached test on prefix %s "
- "(pr = %p)\n", __FUNCTION__,
- ip6_sprintf(&pr->ndpr_prefix.sin6_addr), pr);
-#endif
- break;
-#endif
-#if 0 /* XXXYYY Add in v2.0 */
- for (pfxrtr = pr->ndpr_advrtrs.lh_first; pfxrtr;
- pfxrtr = pfxrtr->pfr_next) {
- if ((pfxrtr->router->flags & ND_RA_FLAG_HA)
- == ND_RA_FLAG_HA)
- break;
- }
-#endif /* 0 */
- }
- if (pr) {
-#if MIP6_DEBUG
- mip6_debug("Found an autoconfigured home address "
- "immediately: %s\n", ip6_sprintf(&pr->ndpr_addr));
-#endif
- }
- else {
-#if MIP6_DEBUG
- mip6_debug("Couldn't find an autoconfigured home address "
- "immediately.\n");
-#endif
- }
- return pr;
-}
-
-
-void
-mip6_enable_hooks(int scope)
-{
- int s;
-
- /*
- * Activate the hook functions. After this some packets might come
- * to the module...
- * Note: mip6_minus_a_case_hook() is an exception and is not handled
- * here.
- */
- s = splimp();
- if (scope == MIP6_GENERIC_HOOKS) {
- mip6_store_dstopt_pre_hook = mip6_store_dstopt_pre;
- mip6_rec_ctrl_sig_hook = mip6_rec_ctrl_sig;
- mip6_new_packet_hook = mip6_new_packet;
- mip6_icmp6_input_hook = mip6_icmp6_input;
- mip6_output_hook = mip6_output;
- }
-
- if (scope == MIP6_CONFIG_HOOKS) {
- /* Activate Home Agent-specific hooks */
- mip6_write_config_data_ha_hook = mip6_write_config_data_ha;
- mip6_clear_config_data_ha_hook = mip6_clear_config_data_ha;
- mip6_enable_func_ha_hook = mip6_enable_func_ha;
-
- /* Activate Mobile Node-specific hooks */
- mip6_write_config_data_mn_hook = mip6_write_config_data_mn;
- mip6_clear_config_data_mn_hook = mip6_clear_config_data_mn;
- mip6_enable_func_mn_hook = mip6_enable_func_mn;
- }
-
- if (scope == MIP6_SPECIFIC_HOOKS) {
- /* Activate Home Agent-specific hooks */
- if (MIP6_IS_HA_ACTIVE) {
- mip6_rec_ra_hook = mip6_rec_raha;
- mip6_global_addr_hook = mip6_global_addr;
- mip6_hal_dynamic_hook = mip6_hal_dynamic;
- mip6_icmp6_output_hook = mip6_icmp6_output;
- }
-
- /* Activate Mobile Node-specific hooks */
- if (MIP6_IS_MN_ACTIVE) {
- mip6_route_optimize_hook = mip6_route_optimize;
- mip6_rec_ra_hook = mip6_rec_ramn;
- mip6_select_defrtr_hook = mip6_select_defrtr;
- mip6_get_home_prefix_hook = mip6_get_home_prefix;
- mip6_prelist_update_hook = mip6_prelist_update;
- mip6_expired_defrouter_hook = mip6_expired_defrouter;
- mip6_probe_pfxrtrs_hook = mip6_probe_pfxrtrs;
- mip6_store_advint_hook = mip6_store_advint;
- mip6_get_md_state_hook = mip6_get_md_state;
- mip6_rec_ba_hook = mip6_rec_ba;
- mip6_rec_br_hook = mip6_rec_bu;
- mip6_stop_bu_hook = mip6_stop_bu;
- mip6_esm_find_hook = mip6_esm_find;
- }
- }
- splx(s);
- return;
-}
-
-
-void
-mip6_disable_hooks(int scope)
-{
- int s;
-
- /*
- * Deactivate the hook functions. After this some packets might not
- * come to the module...
- */
- s = splimp();
-
- if (scope == MIP6_GENERIC_HOOKS) {
- mip6_store_dstopt_pre_hook = 0;
- mip6_rec_ctrl_sig_hook = 0;
- mip6_new_packet_hook = 0;
- mip6_icmp6_input_hook = 0;
- mip6_output_hook = 0;
- }
-
- if (scope == MIP6_SPECIFIC_HOOKS) {
-
- /* De-activate Home Agent-specific hooks */
- if (MIP6_IS_HA_ACTIVE) {
- mip6_rec_ra_hook = 0;
- mip6_global_addr_hook = 0;
- mip6_hal_dynamic_hook = 0;
- mip6_write_config_data_ha_hook = 0;
- mip6_clear_config_data_ha_hook = 0;
- mip6_enable_func_ha_hook = 0;
- }
-
- /* De-activate Mobile Node-specific hooks */
- if (MIP6_IS_MN_ACTIVE) {
- mip6_route_optimize_hook = 0;
- mip6_rec_ra_hook = 0;
- mip6_select_defrtr_hook = 0;
- mip6_get_home_prefix_hook = 0;
- mip6_prelist_update_hook = 0;
- mip6_expired_defrouter_hook = 0;
- mip6_probe_pfxrtrs_hook = 0;
- mip6_store_advint_hook = 0;
- mip6_get_md_state_hook = 0;
- mip6_rec_ba_hook = 0;
- mip6_rec_br_hook = 0;
- mip6_stop_bu_hook = 0;
- mip6_write_config_data_mn_hook = 0;
- mip6_clear_config_data_mn_hook = 0;
- mip6_enable_func_mn_hook = 0;
- mip6_esm_find_hook = 0;
- mip6_minus_a_case_hook = 0;
- }
- }
- splx(s);
- return;
-}
-
-
-int
-mip6_attach(int module)
-{
- /*
- * Important that necessary settings have been done _before_ calling
- * mip6_attach(), e.g. home address specified or autoconfig set.
- * mip6config program sees to that.
- */
-
-/*
- No support for modules here yet. XXXYYY
-
- Old check (not valid any longer):
- #if (defined(MIP6_MN) || defined (MIP6_HA) || defined(MIP6_MODULES))
-*/
- if (mip6_module) {
-#if MIP6_DEBUG
- char *old = "?", *new = "?";
- if (mip6_module == MIP6_HA_MODULE)
- strcpy(old, "Home Agent");
- if (mip6_module == MIP6_MN_MODULE)
- strcpy(old, "Mobile Node");
- if (module == MIP6_HA_MODULE)
- strcpy(new, "Home Agent");
- if (module == MIP6_MN_MODULE)
- strcpy(new, "Mobile Node");
-
- mip6_debug("Can't switch operation mode from %s to %s \n"
- "- please deactivate first (\"mip6config -x\")\n",
- old, new);
-#endif
- return EINVAL;
- }
-
- switch (module) {
- case MIP6_HA_MODULE:
- printf("%s: attach ha\n", __FUNCTION__); /* RM */
- mip6_module = module;
- mip6_ha_init();
- break;
-
- case MIP6_MN_MODULE:
- printf("%s: attach mn\n", __FUNCTION__); /* RM */
- mip6_module = module;
- mip6_mn_init();
- break;
-
- default:
-#if MIP6_DEBUG
- mip6_debug("%s: illegal attach (module = %d)\n", __FUNCTION__,
- module);
-#endif
- return EINVAL;
- }
-
- if (MIP6_IS_MN_ACTIVE) {
- if(mip6_get_home_prefix_hook) /* Test arbitrary hook */
- return 0;
-
- /*
- * If autoconfig state: find a global address to use as Home
- * Address.
- * - Take first available on any interface, else if no found:
- * - Enable hook to wait for a Router Advertisement to give
- * us one.
- */
- if (mip6_config.autoconfig) {
- struct nd_prefix *pr;
- struct in6_addr addr;
-
- addr = in6addr_any;
- if ((pr = mip6_find_auto_home_addr()) != NULL) {
- mip6_esm_create(pr->ndpr_ifp, &addr, &addr,
- &pr->ndpr_addr,pr->ndpr_plen,
- MIP6_STATE_UNDEF, PERMANENT,
- 0xFFFF);
- mip6_enable_hooks(MIP6_SPECIFIC_HOOKS);
- mip6_md_init();
- }
- else {
-#if MIP6_DEBUG
- mip6_debug("Waiting for Router Advertisement "
- "to give me an address.\n");
-#endif
- mip6_minus_a_case_hook = mip6_minus_a_case;
- }
- }
- else {
- /* Manual config */
- mip6_enable_hooks(MIP6_SPECIFIC_HOOKS);
- mip6_md_init();
- }
- }
-
- if (MIP6_IS_HA_ACTIVE) {
- /* XXXYYY Build anycast or is it done? */
- mip6_enable_hooks(MIP6_SPECIFIC_HOOKS);
- }
- return 0;
-}
-
-
-int
-mip6_release(void)
-{
- /* Disable the hooks */
- mip6_disable_hooks(MIP6_SPECIFIC_HOOKS);
-
- if (MIP6_IS_MN_ACTIVE) {
- mip6_mn_exit();
- mip6_md_exit();
- }
-
- if (MIP6_IS_HA_ACTIVE)
- mip6_ha_exit();
-
-/*
- Correspondent Node functionality is never terminated.
- mip6_disable_hooks(MIP6_GENERIC_HOOKS);
- mip6_exit();
-*/
-
- mip6_module = 0; /* Make HA or MN inactive */
-
- return 0;
-}
projects / apple / xnu.git / blobdiff