diff options
| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2016-12-09 14:19:03 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-01-10 09:53:34 +0100 |
| commit | 75b706fde4cbf82bcd41a1cec319778aa0f8eb2d (patch) | |
| tree | ea39a351a1f6337b5a5dd6036314693adef5ffe6 /freebsd/sbin/dhclient/dhclient.c | |
| parent | VMSTAT(8): Port to RTEMS (diff) | |
| download | rtems-libbsd-75b706fde4cbf82bcd41a1cec319778aa0f8eb2d.tar.bz2 | |
Update to FreeBSD head 2016-12-10
Git mirror commit 80c55f08a05ab3b26a73b226ccb56adc3122a55c.
Diffstat (limited to 'freebsd/sbin/dhclient/dhclient.c')
| -rw-r--r-- | freebsd/sbin/dhclient/dhclient.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/freebsd/sbin/dhclient/dhclient.c b/freebsd/sbin/dhclient/dhclient.c index c7b75c59..46ffaffc 100644 --- a/freebsd/sbin/dhclient/dhclient.c +++ b/freebsd/sbin/dhclient/dhclient.c @@ -62,6 +62,7 @@ __FBSDID("$FreeBSD$"); #include "privsep.h" #include <sys/capsicum.h> +#include <sys/endian.h> #include <net80211/ieee80211_freebsd.h> @@ -134,6 +135,9 @@ int fork_privchld(int, int); ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) +/* Minimum MTU is 68 as per RFC791, p. 24 */ +#define MIN_MTU 68 + static time_t scripttime; int @@ -800,9 +804,20 @@ dhcpack(struct packet *packet) void bind_lease(struct interface_info *ip) { + struct option_data *opt; + /* Remember the medium. */ ip->client->new->medium = ip->client->medium; + opt = &ip->client->new->options[DHO_INTERFACE_MTU]; + if (opt->len == sizeof(u_int16_t)) { + u_int16_t mtu = be16dec(opt->data); + if (mtu < MIN_MTU) + warning("mtu size %u < %d: ignored", (unsigned)mtu, MIN_MTU); + else + interface_set_mtu_unpriv(privfd, mtu); + } + /* Write out the new lease. */ write_client_lease(ip, ip->client->new, 0); |