/*
* Copyright (c) 2016-2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
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*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <skywalk/os_skywalk_private.h>
#include <skywalk/nexus/flowswitch/nx_flowswitch.h>
#include <skywalk/nexus/flowswitch/fsw_var.h>
sa_family_t fsw_ip_demux(struct nx_flowswitch *, struct __kern_packet *);
int
fsw_ip_setup(struct nx_flowswitch *fsw, struct ifnet *ifp)
{
#pragma unused(ifp)
fsw->fsw_resolve = fsw_generic_resolve;
fsw->fsw_demux = fsw_ip_demux;
fsw->fsw_frame = NULL;
fsw->fsw_frame_headroom = 0;
return 0;
}
sa_family_t
fsw_ip_demux(struct nx_flowswitch *fsw, struct __kern_packet *pkt)
{
#pragma unused(fsw)
const struct ip *iph;
const struct ip6_hdr *ip6h;
sa_family_t af = AF_UNSPEC;
uint32_t bdlen, bdlim, bdoff;
uint8_t *baddr;
MD_BUFLET_ADDR_ABS_DLEN(pkt, baddr, bdlen, bdlim, bdoff);
baddr += pkt->pkt_headroom;
iph = (struct ip *)(void *)baddr;
ip6h = (struct ip6_hdr *)(void *)baddr;
if ((pkt->pkt_length >= sizeof(*iph)) &&
(pkt->pkt_headroom + sizeof(*iph)) <= bdlim &&
(iph->ip_v == IPVERSION)) {
af = AF_INET;
} else if ((pkt->pkt_length >= sizeof(*ip6h)) &&
(pkt->pkt_headroom + sizeof(*ip6h) <= bdlim) &&
((ip6h->ip6_vfc & IPV6_VERSION_MASK) == IPV6_VERSION)) {
af = AF_INET6;
} else {
SK_ERR("unrecognized pkt, hr %u len %u", pkt->pkt_headroom,
pkt->pkt_length);
}
pkt->pkt_l2_len = 0;
return af;
}