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if_wg: dispatch packets using netisr 

Nothing else uses ip_input directly.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2021-03-19 10:29:54 -06:00
parent e99179b648
commit ea256bde03
1 changed files with 18 additions and 13 deletions
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31
src/if_wg.c
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@ -51,6 +51,7 @@ __FBSDID("$FreeBSD$");
#include <net/if_types.h>
#include <net/ethernet.h>
#include <net/radix.h>
#include <net/netisr.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
@ -2015,7 +2016,7 @@ wg_deliver_in(struct wg_peer *peer)
struct epoch_tracker et;
struct wg_tag *t;
uint32_t af;
int version;
u_int isr;
NET_EPOCH_ENTER(et);
sc = peer->p_sc;
@ -2046,22 +2047,26 @@ wg_deliver_in(struct wg_peer *peer)
m->m_flags &= ~(M_MCAST | M_BCAST);
m->m_pkthdr.rcvif = ifp;
version = mtod(m, struct ip *)->ip_v;
if (version == IPVERSION) {
switch (mtod(m, struct ip *)->ip_v) {
case 4:
isr = NETISR_IP;
af = AF_INET;
BPF_MTAP2(ifp, &af, sizeof(af), m);
CURVNET_SET(ifp->if_vnet);
ip_input(m);
CURVNET_RESTORE();
} else if (version == 6) {
break;
case 6:
isr = NETISR_IPV6;
af = AF_INET6;
BPF_MTAP2(ifp, &af, sizeof(af), m);
CURVNET_SET(ifp->if_vnet);
ip6_input(m);
CURVNET_RESTORE();
} else
break;
default:
m_freem(m);
goto done;
}
BPF_MTAP2(ifp, &af, sizeof(af), m);
CURVNET_SET(ifp->if_vnet);
M_SETFIB(m, ifp->if_fib);
netisr_dispatch(isr, m);
CURVNET_RESTORE();
done:
wg_timers_event_data_received(&peer->p_timers);
}
NET_EPOCH_EXIT(et);