/*
* 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
* limitations under the License.
*
* @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>
#include <netinet/in_arp.h>
#include <netinet/ip6.h>
#include <netinet6/in6_var.h>
#include <netinet6/nd6.h>
#include <net/ethernet.h>
#include <net/route.h>
#include <sys/eventhandler.h>
#include <net/sockaddr_utils.h>
#define FSW_ETHER_LEN_PADDED 16
#define FSW_ETHER_PADDING (FSW_ETHER_LEN_PADDED - ETHER_HDR_LEN)
#define FSW_ETHER_FRAME_HEADROOM FSW_ETHER_LEN_PADDED
static void fsw_ethernet_ctor(struct nx_flowswitch *, struct flow_route *);
static int fsw_ethernet_resolve(struct nx_flowswitch *, struct flow_route *,
struct __kern_packet *);
static void fsw_ethernet_frame(struct nx_flowswitch *, struct flow_route *,
struct __kern_packet *);
static sa_family_t fsw_ethernet_demux(struct nx_flowswitch *,
struct __kern_packet *);
extern struct rtstat_64 rtstat;
int
fsw_ethernet_setup(struct nx_flowswitch *fsw, struct ifnet *ifp)
{
struct ifaddr *lladdr = ifp->if_lladdr;
if (SDL(lladdr->ifa_addr)->sdl_alen != ETHER_ADDR_LEN ||
SDL(lladdr->ifa_addr)->sdl_type != IFT_ETHER) {
return ENOTSUP;
}
ifnet_lladdr_copy_bytes(ifp, fsw->fsw_ether_shost, ETHER_ADDR_LEN);
fsw->fsw_ctor = fsw_ethernet_ctor;
fsw->fsw_resolve = fsw_ethernet_resolve;
fsw->fsw_frame = fsw_ethernet_frame;
fsw->fsw_frame_headroom = FSW_ETHER_FRAME_HEADROOM;
fsw->fsw_demux = fsw_ethernet_demux;
return 0;
}
static void
fsw_ethernet_ctor(struct nx_flowswitch *fsw, struct flow_route *fr)
{
ASSERT(fr->fr_af == AF_INET || fr->fr_af == AF_INET6);
fr->fr_llhdr.flh_gencnt = fsw->fsw_src_lla_gencnt;
bcopy(fsw->fsw_ether_shost, fr->fr_eth.ether_shost, ETHER_ADDR_LEN);
fr->fr_eth.ether_type = ((fr->fr_af == AF_INET) ?
htons(ETHERTYPE_IP) : htons(ETHERTYPE_IPV6));
/* const override */
_CASSERT(sizeof(fr->fr_llhdr.flh_off) == sizeof(uint8_t));
_CASSERT(sizeof(fr->fr_llhdr.flh_len) == sizeof(uint8_t));
*(uint8_t *)(uintptr_t)&fr->fr_llhdr.flh_off = 2;
*(uint8_t *)(uintptr_t)&fr->fr_llhdr.flh_len = ETHER_HDR_LEN;
SK_DF(SK_VERB_FLOW_ROUTE,
"fr 0x%llx eth_type 0x%x eth_src %x:%x:%x:%x:%x:%x",
SK_KVA(fr), ntohs(fr->fr_eth.ether_type),
fr->fr_eth.ether_shost[0], fr->fr_eth.ether_shost[1],
fr->fr_eth.ether_shost[2], fr->fr_eth.ether_shost[3],
fr->fr_eth.ether_shost[4], fr->fr_eth.ether_shost[5]);
}
static int
fsw_ethernet_resolve(struct nx_flowswitch *fsw, struct flow_route *fr,
struct __kern_packet *pkt)
{
#if SK_LOG
char dst_s[MAX_IPv6_STR_LEN];
#endif /* SK_LOG */
struct ifnet *ifp = fsw->fsw_ifp;
struct rtentry *tgt_rt = NULL;
struct sockaddr *tgt_sa = NULL;
struct mbuf *m = NULL;
boolean_t reattach_mbuf = FALSE;
boolean_t probing;
int err = 0;
uint64_t pkt_mflags_restore; /* Save old mbuf flags to restore in error cases */
ASSERT(fr != NULL);
ASSERT(ifp != NULL);
FR_LOCK(fr);
/*
* If the destination is on-link, we use the final destination
* address as target. If it's off-link, we use the gateway
* address instead. Point tgt_rt to the the destination or
* gateway route accordingly.
*/
if (fr->fr_flags & FLOWRTF_ONLINK) {
tgt_sa = SA(&fr->fr_faddr);
tgt_rt = fr->fr_rt_dst;
} else if (fr->fr_flags & FLOWRTF_GATEWAY) {
tgt_sa = SA(&fr->fr_gaddr);
tgt_rt = fr->fr_rt_gw;
}
/*
* Perform another routing table lookup if necessary.
*/
if (tgt_rt == NULL || !(tgt_rt->rt_flags & RTF_UP) ||
fr->fr_want_configure) {
if (fr->fr_want_configure == 0) {
os_atomic_inc(&fr->fr_want_configure, relaxed);
}
err = flow_route_configure(fr, ifp, NULL);
if (err != 0) {
SK_ERR("failed to configure route to %s on %s (err %d)",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname, err);
goto done;
}
/* refresh pointers */
if (fr->fr_flags & FLOWRTF_ONLINK) {
tgt_sa = SA(&fr->fr_faddr);
tgt_rt = fr->fr_rt_dst;
} else if (fr->fr_flags & FLOWRTF_GATEWAY) {
tgt_sa = SA(&fr->fr_gaddr);
tgt_rt = fr->fr_rt_gw;
}
}
if (__improbable(!(fr->fr_flags & (FLOWRTF_ONLINK | FLOWRTF_GATEWAY)))) {
err = EHOSTUNREACH;
SK_ERR("invalid route for %s on %s (err %d)",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname, err);
goto done;
}
ASSERT(tgt_sa != NULL);
ASSERT(tgt_rt != NULL);
/*
* Attempt to convert kpkt to mbuf before acquiring the
* rt lock so that the lock won't be held if we need to do
* blocked a mbuf allocation.
*/
if (!(fr->fr_flags & FLOWRTF_HAS_LLINFO)) {
/*
* We need to resolve; if caller passes in a kpkt,
* convert the kpkt within to mbuf. Caller is then
* reponsible for freeing kpkt. In future, we could
* optimize this by having the ARP/ND lookup routines
* understand kpkt and perform the conversion only
* when it is needed.
*/
if (__probable(pkt != NULL)) {
if (pkt->pkt_pflags & PKT_F_MBUF_DATA) {
reattach_mbuf = TRUE;
m = pkt->pkt_mbuf;
pkt_mflags_restore = (pkt->pkt_pflags & PKT_F_MBUF_MASK);
KPKT_CLEAR_MBUF_DATA(pkt);
} else {
m = fsw_classq_kpkt_to_mbuf(fsw, pkt);
}
if (m == NULL) {
/* not a fatal error; move on */
SK_ERR("failed to allocate mbuf while "
"resolving %s on %s",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname);
}
} else {
m = NULL;
}
}
RT_LOCK(tgt_rt);
if (__improbable(!IS_DIRECT_HOSTROUTE(tgt_rt) ||
tgt_rt->rt_gateway->sa_family != AF_LINK ||
SDL(tgt_rt->rt_gateway)->sdl_type != IFT_ETHER)) {
rtstat.rts_badrtgwroute++;
err = ENETUNREACH;
RT_UNLOCK(tgt_rt);
SK_ERR("bad gateway route %s on %s (err %d)",
sk_sa_ntop(tgt_sa, dst_s, sizeof(dst_s)),
ifp->if_xname, err);
goto done;
}
/*
* If already resolved, grab the link-layer address and mark the
* flow route accordingly. Given that we will use the cached
* link-layer info, there's no need to convert and enqueue the
* packet to ARP/ND (i.e. no need to return EJUSTRETURN).
*/
if (__probable((fr->fr_flags & FLOWRTF_HAS_LLINFO) &&
SDL(tgt_rt->rt_gateway)->sdl_alen == ETHER_ADDR_LEN)) {
VERIFY(m == NULL);
/* XXX Remove explicit __bidi_indexable once rdar://119193012 lands */
struct sockaddr_dl *__bidi_indexable sdl =
(struct sockaddr_dl *__bidi_indexable) SDL(tgt_rt->rt_gateway);
FLOWRT_UPD_ETH_DST(fr, LLADDR(sdl));
os_atomic_or(&fr->fr_flags, (FLOWRTF_RESOLVED | FLOWRTF_HAS_LLINFO), relaxed);
/* if we're not probing, then we're done */
if (!(probing = (fr->fr_want_probe != 0))) {
VERIFY(err == 0);
RT_UNLOCK(tgt_rt);
goto done;
}
os_atomic_store(&fr->fr_want_probe, 0, release);
} else {
probing = FALSE;
os_atomic_andnot(&fr->fr_flags, (FLOWRTF_RESOLVED | FLOWRTF_HAS_LLINFO), relaxed);
}
SK_DF(SK_VERB_FLOW_ROUTE, "%s %s on %s", (probing ?
"probing" : "resolving"), sk_sa_ntop(tgt_sa, dst_s,
sizeof(dst_s)), ifp->if_xname);
/*
* Trigger ARP/NDP resolution or probing.
*/
switch (tgt_sa->sa_family) {
case AF_INET: {
struct sockaddr_dl sdl;
RT_UNLOCK(tgt_rt);
/*
* Note we pass NULL as "hint" parameter, as tgt_sa
* is already refererring to the target address.
*/
SOCKADDR_ZERO(&sdl, sizeof(sdl));
err = arp_lookup_ip(ifp, SIN(tgt_sa), &sdl, sizeof(sdl),
NULL, m);
/*
* If we're resolving (not probing), and it's now resolved,
* grab the link-layer address and update the flow route.
* If we get EJUSTRETURN, the mbuf (if any) would have
* been added to the hold queue. Any other return values
* including 0 means that we need to free it.
*
* If we're probing, we won't have any mbuf to deal with,
* and since we already have the cached llinfo we'll just
* return success even if we get EJUSTRETURN.
*/
if (!probing) {
if (err == 0 && sdl.sdl_alen == ETHER_ADDR_LEN) {
SK_DF(SK_VERB_FLOW_ROUTE,
"fast-resolve %s on %s",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname);
FLOWRT_UPD_ETH_DST(fr, LLADDR(&sdl));
os_atomic_or(&fr->fr_flags, (FLOWRTF_RESOLVED | FLOWRTF_HAS_LLINFO), relaxed);
}
if (err == EJUSTRETURN && m != NULL) {
SK_DF(SK_VERB_FLOW_ROUTE, "packet queued "
"while resolving %s on %s",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname);
m = NULL;
}
} else {
VERIFY(m == NULL);
if (err == EJUSTRETURN) {
err = 0;
}
}
break;
}
case AF_INET6: {
struct llinfo_nd6 *__single ln = tgt_rt->rt_llinfo;
/*
* Check if the route is down. RTF_LLINFO is set during
* RTM_{ADD,RESOLVE}, and is never cleared until the route
* is deleted from the routing table.
*/
if ((tgt_rt->rt_flags & (RTF_UP | RTF_LLINFO)) !=
(RTF_UP | RTF_LLINFO) || ln == NULL) {
err = EHOSTUNREACH;
SK_ERR("route unavailable for %s on %s (err %d)",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname, err);
RT_UNLOCK(tgt_rt);
break;
}
/*
* If we're probing and IPv6 ND cache entry is STALE,
* use it anyway but also mark it for delayed probe
* and update the expiry.
*/
if (probing) {
VERIFY(m == NULL);
VERIFY(ln->ln_state > ND6_LLINFO_INCOMPLETE);
if (ln->ln_state == ND6_LLINFO_STALE) {
ln->ln_asked = 0;
ND6_CACHE_STATE_TRANSITION(ln,
ND6_LLINFO_DELAY);
ln_setexpire(ln, net_uptime() + nd6_delay);
RT_UNLOCK(tgt_rt);
lck_mtx_lock(rnh_lock);
nd6_sched_timeout(NULL, NULL);
lck_mtx_unlock(rnh_lock);
SK_DF(SK_VERB_FLOW_ROUTE,
"NUD probe scheduled for %s on %s",
sk_sa_ntop(tgt_sa, dst_s,
sizeof(dst_s)), ifp->if_xname);
} else {
RT_UNLOCK(tgt_rt);
}
VERIFY(err == 0);
break;
}
/*
* If this is a permanent ND entry, we're done.
*/
if (ln->ln_expire == 0 &&
ln->ln_state == ND6_LLINFO_REACHABLE) {
if (SDL(tgt_rt->rt_gateway)->sdl_alen !=
ETHER_ADDR_LEN) {
err = EHOSTUNREACH;
SK_ERR("invalid permanent route %s on %s"
"ln 0x%llx (err %d)",
sk_sa_ntop(rt_key(tgt_rt), dst_s,
sizeof(dst_s)), ifp->if_xname,
SK_KVA(ln), err);
} else {
SK_DF(SK_VERB_FLOW_ROUTE, "fast-resolve "
"permanent route %s on %s",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname);
/* copy permanent address into the flow route */
/*
* XXX Remove explicit __bidi_indexable once
* rdar://119193012 lands
*/
struct sockaddr_dl *__bidi_indexable sdl =
(struct sockaddr_dl *__bidi_indexable) SDL(tgt_rt->rt_gateway);
FLOWRT_UPD_ETH_DST(fr, LLADDR(sdl));
os_atomic_or(&fr->fr_flags, (FLOWRTF_RESOLVED | FLOWRTF_HAS_LLINFO), relaxed);
VERIFY(err == 0);
}
RT_UNLOCK(tgt_rt);
break;
}
if (ln->ln_state == ND6_LLINFO_NOSTATE) {
ND6_CACHE_STATE_TRANSITION(ln, ND6_LLINFO_INCOMPLETE);
}
if (ln->ln_state == ND6_LLINFO_INCOMPLETE && (!ln->ln_asked ||
!(fr->fr_flags & FLOWRTF_HAS_LLINFO))) {
struct nd_ifinfo *ndi = ND_IFINFO(tgt_rt->rt_ifp);
/*
* There is a neighbor cache entry, but no Ethernet
* address response yet. Replace the held mbuf
* (if any) with this the one we have (if any),
* else leave it alone.
*
* This code conforms to the rate-limiting rule
* described in Section 7.2.2 of RFC 4861, because
* the timer is set correctly after sending an
* NS below.
*/
if (m != NULL) {
if (ln->ln_hold != NULL) {
m_freem_list(ln->ln_hold);
}
ln->ln_hold = m;
m = NULL;
SK_DF(SK_VERB_FLOW_ROUTE,
"packet queued while resolving %s on %s",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname);
}
VERIFY(ndi != NULL && ndi->initialized);
ln->ln_asked++;
ln_setexpire(ln, net_uptime() + ndi->retrans / 1000);
RT_UNLOCK(tgt_rt);
SK_DF(SK_VERB_FLOW_ROUTE, "soliciting for %s on %s"
"ln 0x%llx state %u", sk_sa_ntop(rt_key(tgt_rt),
dst_s, sizeof(dst_s)), ifp->if_xname, SK_KVA(ln),
ln->ln_state);
/* XXX Refactor this to use same src ip */
nd6_ns_output(tgt_rt->rt_ifp, NULL,
&SIN6(rt_key(tgt_rt))->sin6_addr, NULL, NULL, 0);
lck_mtx_lock(rnh_lock);
nd6_sched_timeout(NULL, NULL);
lck_mtx_unlock(rnh_lock);
err = EJUSTRETURN;
} else {
SK_DF(SK_VERB_FLOW_ROUTE, "fast-resolve %s on %s",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s,
sizeof(dst_s)), ifp->if_xname);
/*
* The neighbor cache entry has been resolved;
* copy the address into the flow route.
*/
/*
* XXX Remove explicit __bidi_indexable once
* rdar://119193012 lands
*/
struct sockaddr_dl *__bidi_indexable sdl =
(struct sockaddr_dl *__bidi_indexable) SDL(tgt_rt->rt_gateway);
FLOWRT_UPD_ETH_DST(fr, LLADDR(sdl));
os_atomic_or(&fr->fr_flags, (FLOWRTF_RESOLVED | FLOWRTF_HAS_LLINFO), relaxed);
RT_UNLOCK(tgt_rt);
VERIFY(err == 0);
}
/*
* XXX Need to optimize for the NDP garbage
* collection. It would be even better to unify
* BSD/SK NDP management through the completion
* of L2/L3 split.
*/
break;
}
default:
VERIFY(0);
/* NOTREACHED */
__builtin_unreachable();
}
RT_LOCK_ASSERT_NOTHELD(tgt_rt);
done:
if (m != NULL) {
if (reattach_mbuf) {
pkt->pkt_mbuf = m;
pkt->pkt_pflags |= pkt_mflags_restore;
} else {
m_freem_list(m);
}
m = NULL;
}
if (__improbable(err != 0 && err != EJUSTRETURN)) {
SK_ERR("route to %s on %s can't be resolved (err %d)",
sk_sa_ntop(SA(&fr->fr_faddr), dst_s, sizeof(dst_s)),
ifp->if_xname, err);
/* keep FLOWRTF_HAS_LLINFO as llinfo is still useful */
os_atomic_andnot(&fr->fr_flags, FLOWRTF_RESOLVED, relaxed);
flow_route_cleanup(fr);
}
FR_UNLOCK(fr);
return err;
}
static void
fsw_ethernet_frame(struct nx_flowswitch *fsw, struct flow_route *fr,
struct __kern_packet *pkt)
{
/* in the event the source MAC address changed, update our copy */
if (__improbable(fr->fr_llhdr.flh_gencnt != fsw->fsw_src_lla_gencnt)) {
uint8_t old_shost[ETHER_ADDR_LEN];
bcopy(&fr->fr_eth.ether_shost, &old_shost, ETHER_ADDR_LEN);
fsw_ethernet_ctor(fsw, fr);
SK_ERR("fr 0x%llx source MAC address updated on %s, "
"was %x:%x:%x:%x:%x:%x now %x:%x:%x:%x:%x:%x",
SK_KVA(fr), fsw->fsw_ifp,
old_shost[0], old_shost[1],
old_shost[2], old_shost[3],
old_shost[4], old_shost[5],
fr->fr_eth.ether_shost[0], fr->fr_eth.ether_shost[1],
fr->fr_eth.ether_shost[2], fr->fr_eth.ether_shost[3],
fr->fr_eth.ether_shost[4], fr->fr_eth.ether_shost[5]);
}
_CASSERT(sizeof(fr->fr_eth_padded) == FSW_ETHER_LEN_PADDED);
if ((fr->fr_flags & FLOWRTF_DST_LL_MCAST) != 0) {
pkt->pkt_link_flags |= PKT_LINKF_MCAST;
} else if ((fr->fr_flags & FLOWRTF_DST_LL_BCAST) != 0) {
pkt->pkt_link_flags |= PKT_LINKF_BCAST;
}
ASSERT(pkt->pkt_headroom >= FSW_ETHER_LEN_PADDED);
char *pkt_buf;
MD_BUFLET_ADDR_ABS(pkt, pkt_buf);
sk_copy64_16((uint64_t *)(void *)&fr->fr_eth_padded,
(uint64_t *)(void *)(pkt_buf + pkt->pkt_headroom - FSW_ETHER_LEN_PADDED));
pkt->pkt_headroom -= ETHER_HDR_LEN;
pkt->pkt_l2_len = ETHER_HDR_LEN;
if ((pkt->pkt_pflags & PKT_F_MBUF_DATA) != 0) {
/* frame and fix up mbuf */
struct mbuf *m = pkt->pkt_mbuf;
void *buf = m_mtod_current(m) - FSW_ETHER_LEN_PADDED;
sk_copy64_16((uint64_t *)(void *)&fr->fr_eth_padded, buf);
ASSERT((uintptr_t)m->m_data ==
(uintptr_t)mbuf_datastart(m) + FSW_ETHER_FRAME_HEADROOM);
m->m_data -= ETHER_HDR_LEN;
m->m_len += ETHER_HDR_LEN;
m_pktlen(m) += ETHER_HDR_LEN;
ASSERT(m->m_len == m_pktlen(m));
pkt->pkt_length = m_pktlen(m);
} else {
METADATA_ADJUST_LEN(pkt, ETHER_HDR_LEN, pkt->pkt_headroom);
}
}
static sa_family_t
fsw_ethernet_demux(struct nx_flowswitch *fsw, struct __kern_packet *pkt)
{
#pragma unused(fsw)
const struct ether_header *eh;
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;
eh = (struct ether_header *)(void *)baddr;
if (__improbable(sizeof(*eh) > pkt->pkt_length)) {
STATS_INC(&fsw->fsw_stats, FSW_STATS_RX_DEMUX_ERR);
SK_ERR("unrecognized pkt, len %u", pkt->pkt_length);
return AF_UNSPEC;
}
if (__improbable(pkt->pkt_headroom + sizeof(*eh) > bdlim)) {
SK_ERR("ethernet header overrun 1st buflet");
STATS_INC(&fsw->fsw_stats, FSW_STATS_RX_DEMUX_ERR);
return AF_UNSPEC;
}
if (__improbable((pkt->pkt_link_flags & PKT_LINKF_ETHFCS) != 0)) {
pkt->pkt_length -= ETHER_CRC_LEN;
pkt->pkt_link_flags &= ~PKT_LINKF_ETHFCS;
if (pkt->pkt_pflags & PKT_F_MBUF_DATA) {
ASSERT((pkt->pkt_mbuf->m_flags & M_HASFCS) != 0);
m_adj(pkt->pkt_mbuf, -ETHER_CRC_LEN);
pkt->pkt_mbuf->m_flags &= ~M_HASFCS;
}
}
pkt->pkt_l2_len = ETHER_HDR_LEN;
if ((eh->ether_dhost[0] & 1) == 0) {
/*
* When the driver is put into promiscuous mode we may receive
* unicast frames that are not intended for our interfaces.
* They are marked here as being promiscuous so the caller may
* dispose of them after passing the packets to any interface
* filters.
*/
if (_ether_cmp(eh->ether_dhost, IF_LLADDR(fsw->fsw_ifp))) {
pkt->pkt_pflags |= PKT_F_PROMISC;
STATS_INC(&fsw->fsw_stats, FSW_STATS_RX_DEMUX_PROMISC);
return AF_UNSPEC;
}
}
uint16_t ether_type = ntohs(eh->ether_type);
switch (ether_type) {
case ETHERTYPE_IP:
af = AF_INET;
break;
case ETHERTYPE_IPV6:
af = AF_INET6;
break;
default:
STATS_INC(&fsw->fsw_stats, FSW_STATS_RX_DEMUX_UNSPEC);
break;
}
return af;
}