diff options
| author |   reyk <reyk@openbsd.org> | 2016-11-29 10:09:57 +0000 |
|---|---|---|
| committer | reyk <reyk@openbsd.org> | 2016-11-29 10:09:57 +0000 |
| commit | fc3b235ffdda6271635ba0ea8a75edaee48b859e (patch) | |
| tree | a6f362aa7323d861649006e27c0c739c2550c4a3 /sys | |
| parent | Correct a bit test introduced in user.c rev 1.111 that made it impossible (diff) | |
| download | wireguard-openbsd-fc3b235ffdda6271635ba0ea8a75edaee48b859e.tar.xz wireguard-openbsd-fc3b235ffdda6271635ba0ea8a75edaee48b859e.zip | |
For virtual Ethernet drivers that don't have a technical limit of the
hardmtu, pick a value of 65435 that leaves space for some
encapsulation and almost a complete max-IP packet. After some
discussion we picked this arbitrary value.
OK dlg@
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/net/if_pair.c | 4 | ||||
| -rw-r--r-- | sys/net/if_vether.c | 3 | ||||
| -rw-r--r-- | sys/net/if_vxlan.c | 4 | ||||
| -rw-r--r-- | sys/netinet/if_ether.h | 7 |
4 files changed, 12 insertions, 6 deletions
diff --git a/sys/net/if_pair.c b/sys/net/if_pair.c index 92241b6a0bb..03e66f329ee 100644 --- a/sys/net/if_pair.c +++ b/sys/net/if_pair.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_pair.c,v 1.7 2016/04/13 11:41:15 mpi Exp $ */ +/* $OpenBSD: if_pair.c,v 1.8 2016/11/29 10:09:57 reyk Exp $ */ /* * Copyright (c) 2015 Reyk Floeter <reyk@openbsd.org> @@ -122,7 +122,7 @@ pair_clone_create(struct if_clone *ifc, int unit) ifp->if_start = pairstart; IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); - ifp->if_hardmtu = 0xffff; + ifp->if_hardmtu = ETHER_MAX_HARDMTU_LEN; ifp->if_capabilities = IFCAP_VLAN_MTU; ifmedia_init(&sc->sc_media, 0, pair_media_change, diff --git a/sys/net/if_vether.c b/sys/net/if_vether.c index dbc90a7cdc2..082c05615d6 100644 --- a/sys/net/if_vether.c +++ b/sys/net/if_vether.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_vether.c,v 1.27 2016/04/13 11:41:15 mpi Exp $ */ +/* $OpenBSD: if_vether.c,v 1.28 2016/11/29 10:09:57 reyk Exp $ */ /* * Copyright (c) 2009 Theo de Raadt @@ -89,6 +89,7 @@ vether_clone_create(struct if_clone *ifc, int unit) ifp->if_start = vetherstart; IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); + ifp->if_hardmtu = ETHER_MAX_HARDMTU_LEN; ifp->if_capabilities = IFCAP_VLAN_MTU; ifmedia_init(&sc->sc_media, 0, vether_media_change, diff --git a/sys/net/if_vxlan.c b/sys/net/if_vxlan.c index c87b17899fb..366c78b0378 100644 --- a/sys/net/if_vxlan.c +++ b/sys/net/if_vxlan.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_vxlan.c,v 1.51 2016/10/25 16:31:08 bluhm Exp $ */ +/* $OpenBSD: if_vxlan.c,v 1.52 2016/11/29 10:09:57 reyk Exp $ */ /* * Copyright (c) 2013 Reyk Floeter <reyk@openbsd.org> @@ -146,7 +146,7 @@ vxlan_clone_create(struct if_clone *ifc, int unit) ifp->if_start = vxlanstart; IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); - ifp->if_hardmtu = 0xffff; + ifp->if_hardmtu = ETHER_MAX_HARDMTU_LEN; ifp->if_capabilities = IFCAP_VLAN_MTU; ifmedia_init(&sc->sc_media, 0, vxlan_media_change, diff --git a/sys/netinet/if_ether.h b/sys/netinet/if_ether.h index 279632102f8..fdff5c8c1cf 100644 --- a/sys/netinet/if_ether.h +++ b/sys/netinet/if_ether.h @@ -1,4 +1,4 @@ -/* $OpenBSD: if_ether.h,v 1.72 2016/06/28 17:18:24 chris Exp $ */ +/* $OpenBSD: if_ether.h,v 1.73 2016/11/29 10:09:57 reyk Exp $ */ /* $NetBSD: if_ether.h,v 1.22 1996/05/11 13:00:00 mycroft Exp $ */ /* @@ -60,6 +60,11 @@ #define ETHER_ALIGN 2 /* driver adjust for IP hdr alignment */ /* + * The maximum supported Ethernet length and some space for encapsulation. + */ +#define ETHER_MAX_HARDMTU_LEN 65435 + +/* * Ethernet address - 6 octets */ struct ether_addr { |