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https://github.com/lwip-tcpip/lwip.git
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95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
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/**
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* @file
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*
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* IPv6 static route table.
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*/
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/*
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* Copyright (c) 2015 Nest Labs, Inc.
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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 modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Pradip De <pradipd@google.com>
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*
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*
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* Please coordinate changes and requests with Pradip De
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* <pradipd@google.com>
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*/
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#ifndef __LWIP_IP6_ROUTE_TABLE_H__
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#define __LWIP_IP6_ROUTE_TABLE_H__
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#include "lwip/opt.h"
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#if LWIP_IPV6 /* don't build if not configured for use in lwipopts.h */
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#include "lwip/ip6_addr.h"
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#include "lwip/err.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct netif;
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/**
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* LWIP_IPV6_NUM_ROUTES: Number of IPV6 routes that can be kept in the static route table.
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*/
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#ifndef LWIP_IPV6_NUM_ROUTE_ENTRIES
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#define LWIP_IPV6_NUM_ROUTE_ENTRIES (8)
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#endif
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#define IP6_MAX_PREFIX_LEN (128)
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#define IP6_PREFIX_ALLOWED_GRANULARITY (8)
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/* Prefix length cannot be greater than 128 bits and needs to be at a byte boundary */
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#define ip6_prefix_valid(prefix_len) (((prefix_len) <= IP6_MAX_PREFIX_LEN) && \
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(((prefix_len) % IP6_PREFIX_ALLOWED_GRANULARITY) == 0))
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struct ip6_prefix {
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ip6_addr_t addr;
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u8_t prefix_len; /* prefix length in bits at byte boundaries */
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};
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struct ip6_route_entry {
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struct ip6_prefix prefix;
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struct netif *netif;
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const ip6_addr_t *gateway;
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};
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err_t ip6_add_route_entry(const struct ip6_prefix *ip6_prefix, struct netif *netif,
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const ip6_addr_t *gateway, s8_t *idx);
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void ip6_remove_route_entry(const struct ip6_prefix *ip6_prefix);
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s8_t ip6_find_route_entry(const ip6_addr_t *ip6_dest_addr);
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struct netif *ip6_static_route(const ip6_addr_t *src, const ip6_addr_t *dest);
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const ip6_addr_t *ip6_get_gateway(struct netif *netif, const ip6_addr_t *dest);
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const struct ip6_route_entry *ip6_get_route_table(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_IPV6 */
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#endif /* __LWIP_IP6_ROUTE_TABLE_H__ */
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