6ca363eb7b
lookup KPI in ip_output() like it is already used in ip_forward(). However, when there is no PCB provided we can use fast KPI, gaining performance advantage. Typical case when ip_output() is called without a PCB pointer is a sendto(2) on a not connected UDP socket. In practice DNS servers do this. Reviewed by: melifaro Differential Revision: https://reviews.freebsd.org/D19804
63 lines
2.6 KiB
C
63 lines
2.6 KiB
C
/*-
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* Copyright (c) 2015
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* Alexander V. Chernikov <melifaro@FreeBSD.org>
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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 University 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 REGENTS 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 REGENTS 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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#ifndef _NETINET_IN_FIB_H_
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#define _NETINET_IN_FIB_H_
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/* Basic nexthop info used for uRPF/mtu checks */
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struct nhop4_basic {
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struct ifnet *nh_ifp; /* Logical egress interface */
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uint16_t nh_mtu; /* nexthop mtu */
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uint16_t nh_flags; /* nhop flags */
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struct in_addr nh_addr; /* GW/DST IPv4 address */
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};
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/* Extended nexthop info used for control protocols */
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struct nhop4_extended {
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struct ifnet *nh_ifp; /* Logical egress interface */
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struct in_ifaddr *nh_ia; /* Associated address */
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uint16_t nh_mtu; /* nexthop mtu */
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uint16_t nh_flags; /* nhop flags */
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uint8_t spare[4];
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struct in_addr nh_addr; /* GW/DST IPv4 address */
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struct in_addr nh_src; /* default source IPv4 address */
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uint64_t spare2;
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};
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int fib4_lookup_nh_basic(uint32_t fibnum, struct in_addr dst, uint32_t flags,
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uint32_t flowid, struct nhop4_basic *pnh4);
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int fib4_lookup_nh_ext(uint32_t fibnum, struct in_addr dst, uint32_t flags,
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uint32_t flowid, struct nhop4_extended *pnh4);
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void fib4_free_nh_ext(uint32_t fibnum, struct nhop4_extended *pnh4);
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#endif
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