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96 lines
3.3 KiB
Diff
96 lines
3.3 KiB
Diff
From 9c0d445ef4abffa2b9342ad65e85ef425c1f83bb Mon Sep 17 00:00:00 2001
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From: Simon Kelley <simon@thekelleys.org.uk>
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Date: Wed, 9 Jan 2019 17:57:56 +0000
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Subject: [PATCH 27/32] Fix e7bfd556c079c8b5e7425aed44abc35925b24043 to
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actually work.
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Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
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---
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src/dhcp.c | 54 +++++++++++++++++++++++++----------------------------
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src/dhcp6.c | 2 +-
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2 files changed, 26 insertions(+), 30 deletions(-)
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--- a/src/dhcp.c
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+++ b/src/dhcp.c
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@@ -754,19 +754,6 @@ int address_allocate(struct dhcp_context
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if (addr.s_addr == d->router.s_addr)
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break;
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- /* in consec-ip mode, skip addresses equal to
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- the number of addresses rejected by clients. This
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- should avoid the same client being offered the same
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- address after it has rjected it. */
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- if (option_bool(OPT_CONSEC_ADDR))
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- {
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- if (c->addr_epoch)
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- {
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- c->addr_epoch--;
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- d = context; /* d non-NULL skips the address. */
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- }
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- }
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-
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/* Addresses which end in .255 and .0 are broken in Windows even when using
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supernetting. ie dhcp-range=192.168.0.1,192.168.1.254,255,255,254.0
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then 192.168.0.255 is a valid IP address, but not for Windows as it's
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@@ -778,24 +765,33 @@ int address_allocate(struct dhcp_context
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(!IN_CLASSC(ntohl(addr.s_addr)) ||
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((ntohl(addr.s_addr) & 0xff) != 0xff && ((ntohl(addr.s_addr) & 0xff) != 0x0))))
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{
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- struct ping_result *r;
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-
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- if ((r = do_icmp_ping(now, addr, j, loopback)))
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- {
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- /* consec-ip mode: we offered this address for another client
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- (different hash) recently, don't offer it to this one. */
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- if (!option_bool(OPT_CONSEC_ADDR) || r->hash == j)
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- {
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- *addrp = addr;
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- return 1;
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- }
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- }
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+ /* in consec-ip mode, skip addresses equal to
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+ the number of addresses rejected by clients. This
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+ should avoid the same client being offered the same
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+ address after it has rjected it. */
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+ if (option_bool(OPT_CONSEC_ADDR) && c->addr_epoch)
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+ c->addr_epoch--;
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else
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{
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- /* address in use: perturb address selection so that we are
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- less likely to try this address again. */
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- if (!option_bool(OPT_CONSEC_ADDR))
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- c->addr_epoch++;
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+ struct ping_result *r;
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+
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+ if ((r = do_icmp_ping(now, addr, j, loopback)))
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+ {
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+ /* consec-ip mode: we offered this address for another client
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+ (different hash) recently, don't offer it to this one. */
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+ if (!option_bool(OPT_CONSEC_ADDR) || r->hash == j)
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+ {
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+ *addrp = addr;
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+ return 1;
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+ }
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+ }
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+ else
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+ {
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+ /* address in use: perturb address selection so that we are
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+ less likely to try this address again. */
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+ if (!option_bool(OPT_CONSEC_ADDR))
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+ c->addr_epoch++;
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+ }
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}
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}
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--- a/src/dhcp6.c
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+++ b/src/dhcp6.c
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@@ -436,7 +436,7 @@ struct dhcp_context *address6_allocate(s
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skip addresses equal to the number of addresses rejected
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by clients. This should avoid the same client being offered the same
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address after it has rjected it. */
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- start = lease_find_max_addr6(c) + serial + c->addr_epoch;
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+ start = lease_find_max_addr6(c) + 1 + serial + c->addr_epoch;
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if (c->addr_epoch)
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c->addr_epoch--;
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}
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