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freebsd-dev/sys/netinet6/in6_fib.h

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Merge helper fib* functions used for basic lookups. Vast majority of rtalloc(9) users require only basic info from route table (e.g. "does the rtentry interface match with the interface I have?". "what is the MTU?", "Give me the IPv4 source address to use", etc..). Instead of hand-rolling lookups, checking if rtentry is up, valid, dealing with IPv6 mtu, finding "address" ifp (almost never done right), provide easy-to-use API hiding all the complexity and returning the needed info into small on-stack structure. This change also helps hiding route subsystem internals (locking, direct rtentry accesses). Additionaly, using this API improves lookup performance since rtentry is not locked. (This is safe, since all the rtentry changes happens under both radix WLOCK and rtentry WLOCK). Sponsored by: Yandex LLC
2015-12-08 10:50:03 +00:00
/*-
* Copyright (c) 2015
* Alexander V. Chernikov <melifaro@FreeBSD.org>
*
* 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.
Renumber copyright clause 4 Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00
* 3. Neither the name of the University nor the names of its contributors
Merge helper fib* functions used for basic lookups. Vast majority of rtalloc(9) users require only basic info from route table (e.g. "does the rtentry interface match with the interface I have?". "what is the MTU?", "Give me the IPv4 source address to use", etc..). Instead of hand-rolling lookups, checking if rtentry is up, valid, dealing with IPv6 mtu, finding "address" ifp (almost never done right), provide easy-to-use API hiding all the complexity and returning the needed info into small on-stack structure. This change also helps hiding route subsystem internals (locking, direct rtentry accesses). Additionaly, using this API improves lookup performance since rtentry is not locked. (This is safe, since all the rtentry changes happens under both radix WLOCK and rtentry WLOCK). Sponsored by: Yandex LLC
2015-12-08 10:50:03 +00:00
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* $FreeBSD$
*/
#ifndef _NETINET6_IN6_FIB_H_
#define _NETINET6_IN6_FIB_H_
/* Basic nexthop info used for uRPF/mtu checks */
struct nhop6_basic {
struct ifnet *nh_ifp; /* Logical egress interface */
uint16_t nh_mtu; /* nexthop mtu */
uint16_t nh_flags; /* nhop flags */
uint8_t spare[4];
struct in6_addr nh_addr; /* GW/DST IPv4 address */
};
in6_fib: return nh_ia in the ext interface as we do for IPv4 Like for IPv4 add nh_ia to the ext interface and return rt_ifa in order to be used for, e.g., packet/octets accounting purposes. Reviewed by: melifaro MFC after: 1 week Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D23873
2020-03-03 09:50:33 +00:00
/* Extended nexthop info used for control protocols. */
Merge helper fib* functions used for basic lookups. Vast majority of rtalloc(9) users require only basic info from route table (e.g. "does the rtentry interface match with the interface I have?". "what is the MTU?", "Give me the IPv4 source address to use", etc..). Instead of hand-rolling lookups, checking if rtentry is up, valid, dealing with IPv6 mtu, finding "address" ifp (almost never done right), provide easy-to-use API hiding all the complexity and returning the needed info into small on-stack structure. This change also helps hiding route subsystem internals (locking, direct rtentry accesses). Additionaly, using this API improves lookup performance since rtentry is not locked. (This is safe, since all the rtentry changes happens under both radix WLOCK and rtentry WLOCK). Sponsored by: Yandex LLC
2015-12-08 10:50:03 +00:00
struct nhop6_extended {
struct ifnet *nh_ifp; /* Logical egress interface */
in6_fib: return nh_ia in the ext interface as we do for IPv4 Like for IPv4 add nh_ia to the ext interface and return rt_ifa in order to be used for, e.g., packet/octets accounting purposes. Reviewed by: melifaro MFC after: 1 week Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D23873
2020-03-03 09:50:33 +00:00
struct in6_ifaddr *nh_ia; /* Associated address. */
Merge helper fib* functions used for basic lookups. Vast majority of rtalloc(9) users require only basic info from route table (e.g. "does the rtentry interface match with the interface I have?". "what is the MTU?", "Give me the IPv4 source address to use", etc..). Instead of hand-rolling lookups, checking if rtentry is up, valid, dealing with IPv6 mtu, finding "address" ifp (almost never done right), provide easy-to-use API hiding all the complexity and returning the needed info into small on-stack structure. This change also helps hiding route subsystem internals (locking, direct rtentry accesses). Additionaly, using this API improves lookup performance since rtentry is not locked. (This is safe, since all the rtentry changes happens under both radix WLOCK and rtentry WLOCK). Sponsored by: Yandex LLC
2015-12-08 10:50:03 +00:00
uint16_t nh_mtu; /* nexthop mtu */
uint16_t nh_flags; /* nhop flags */
uint8_t spare[4];
struct in6_addr nh_addr; /* GW/DST IPv6 address */
in6_fib: return nh_ia in the ext interface as we do for IPv4 Like for IPv4 add nh_ia to the ext interface and return rt_ifa in order to be used for, e.g., packet/octets accounting purposes. Reviewed by: melifaro MFC after: 1 week Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D23873
2020-03-03 09:50:33 +00:00
uint64_t spare2[1];
Merge helper fib* functions used for basic lookups. Vast majority of rtalloc(9) users require only basic info from route table (e.g. "does the rtentry interface match with the interface I have?". "what is the MTU?", "Give me the IPv4 source address to use", etc..). Instead of hand-rolling lookups, checking if rtentry is up, valid, dealing with IPv6 mtu, finding "address" ifp (almost never done right), provide easy-to-use API hiding all the complexity and returning the needed info into small on-stack structure. This change also helps hiding route subsystem internals (locking, direct rtentry accesses). Additionaly, using this API improves lookup performance since rtentry is not locked. (This is safe, since all the rtentry changes happens under both radix WLOCK and rtentry WLOCK). Sponsored by: Yandex LLC
2015-12-08 10:50:03 +00:00
};
int fib6_lookup_nh_basic(uint32_t fibnum, const struct in6_addr *dst,
uint32_t scopeid, uint32_t flags, uint32_t flowid,struct nhop6_basic *pnh6);
int fib6_lookup_nh_ext(uint32_t fibnum, const struct in6_addr *dst,
uint32_t scopeid, uint32_t flags, uint32_t flowid,
struct nhop6_extended *pnh6);
void fib6_free_nh_ext(uint32_t fibnum, struct nhop6_extended *pnh6);
#endif
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