diff options
Diffstat (limited to 'sbin/dhclient/dhclient.c')
| -rw-r--r-- | sbin/dhclient/dhclient.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/sbin/dhclient/dhclient.c b/sbin/dhclient/dhclient.c index e13e1599543..4bba00a1524 100644 --- a/sbin/dhclient/dhclient.c +++ b/sbin/dhclient/dhclient.c @@ -1,4 +1,4 @@ -/* $OpenBSD: dhclient.c,v 1.356 2015/02/07 02:07:32 krw Exp $ */ +/* $OpenBSD: dhclient.c,v 1.357 2015/02/07 10:08:06 krw Exp $ */ /* * Copyright 2004 Henning Brauer <henning@openbsd.org> @@ -913,6 +913,18 @@ bind_lease(void) /* Deleting the addresses also clears out arp entries. */ delete_addresses(); flush_routes(); + + opt = &options[DHO_INTERFACE_MTU]; + if (opt->len == sizeof(u_int16_t)) { + u_int16_t mtu; + memcpy(&mtu, opt->data, sizeof(mtu)); + mtu = ntohs(mtu); + /* "The minimum legal value for the MTU is 68." */ + if (mtu < 68) + warning("mtu size %u < 68: ignored", mtu); + else + set_interface_mtu(mtu); + } opt = &options[DHO_SUBNET_MASK]; if (opt->len == sizeof(mask)) |