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udhcpc: ensure at least one unicast renew attempt

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2018-10-30 11:56:18 +01:00
parent a541314b1f
commit c05aa6a776
2 changed files with 6 additions and 4 deletions
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5
networking/udhcp/dhcpc.c
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@@ -1725,8 +1725,9 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
move_from_unaligned32(lease_seconds, temp);
lease_seconds = ntohl(lease_seconds);
/* paranoia: must not be too small and not prone to overflows */
if (lease_seconds < 0x10)
lease_seconds = 0x10;
/* timeout > 60 - ensures at least one unicast renew attempt */
if (lease_seconds < 2 * 61)
lease_seconds = 2 * 61;
//if (lease_seconds > 0x7fffffff)
// lease_seconds = 0x7fffffff;
//^^^not necessary since "timeout = lease_seconds / 2"