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| author | mbr <mbr@FreeBSD.org> | 2004-08-16 21:26:04 +0000 |
|---|---|---|
| committer | mbr <mbr@FreeBSD.org> | 2004-08-16 21:26:04 +0000 |
| commit | c2d030ed8970881c2ca403866983d6d7cbb15ab3 (patch) | |
| tree | 5933dec684ccf31506c4fc0ea5bf94b89e422039 /contrib/isc-dhcp | |
| parent | df7926e56986f042176266016acaf7f9950bebf8 (diff) | |
| download | FreeBSD-src-c2d030ed8970881c2ca403866983d6d7cbb15ab3.zip FreeBSD-src-c2d030ed8970881c2ca403866983d6d7cbb15ab3.tar.gz | |
Recommit removed Rev. 1.40. This fix does solve a FPE with negative lease
time as described in the PR below.
It seems that this patch should have been part of the vendor tree but got
accidently missed in the 3.0.1 final version. It will definitly be
part of 3.0.2 but until then it's a long way to go.
Submitted by: ISC (Vendor)
PR: bin/54517
Diffstat (limited to 'contrib/isc-dhcp')
| -rw-r--r-- | contrib/isc-dhcp/client/dhclient.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/contrib/isc-dhcp/client/dhclient.c b/contrib/isc-dhcp/client/dhclient.c index a942051..939bc7a 100644 --- a/contrib/isc-dhcp/client/dhclient.c +++ b/contrib/isc-dhcp/client/dhclient.c @@ -838,11 +838,15 @@ void dhcpack (packet) /* If it wasn't specified by the server, calculate it. */ if (!client -> new -> renewal) - client -> new -> renewal = - client -> new -> expiry / 2; + client -> new -> renewal = client -> new -> expiry / 2 + 1; + + if (client -> new -> renewal <= 0) + client -> new -> renewal = TIME_MAX; /* Now introduce some randomness to the renewal time: */ - client -> new -> renewal = (((client -> new -> renewal + 3) * 3 / 4) + + if (client -> new -> renewal <= TIME_MAX / 3 - 3) + client -> new -> renewal = + (((client -> new -> renewal + 3) * 3 / 4) + (random () % /* XXX NUMS */ ((client -> new -> renewal + 3) / 4))); @@ -861,14 +865,25 @@ void dhcpack (packet) } else client -> new -> rebind = 0; - if (!client -> new -> rebind) - client -> new -> rebind = - (client -> new -> expiry * 7) / 8; /* XXX NUMS */ + if (client -> new -> rebind <= 0) { + if (client -> new -> expiry <= TIME_MAX / 7) + client -> new -> rebind = + client -> new -> expiry * 7 / 8; + else + client -> new -> rebind = + client -> new -> expiry / 8 * 7; + } /* Make sure our randomness didn't run the renewal time past the rebind time. */ - if (client -> new -> renewal > client -> new -> rebind) - client -> new -> renewal = (client -> new -> rebind * 3) / 4; + if (client -> new -> renewal > client -> new -> rebind) { + if (client -> new -> rebind <= TIME_MAX / 3) + client -> new -> renewal = + client -> new -> rebind * 3 / 4; + else + client -> new -> renewal = + client -> new -> rebind / 4 * 3; + } client -> new -> expiry += cur_time; /* Lease lengths can never be negative. */ |
