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dhcp-host selection fix for v4/v6.

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Avoid treating a --dhcp-host which has an IPv6 address
as eligable for use with DHCPv4 on the grounds that it has
no address, and vice-versa.
This commit is contained in:
Simon Kelley
2021-02-28 17:56:54 +00:00
parent 17360439dc
commit e7c0d7b348
2 changed files with 19 additions and 15 deletions
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6
CHANGELOG
View File

@@ -14,6 +14,12 @@ version 2.85
sorts before v2.83test1. This fixes the problem which lead
to 2.84 announcing itself as 2.84rc2.
Avoid treating a --dhcp-host which has an IPv6 address
as eligable for use with DHCPv4 on the grounds that it has
no address, and vice-versa. Thanks to Viktor Papp for
spotting the problem. (This bug was fixed was back in 2.67, and
then regessed in 2.81).
version 2.84
Fix a problem, introduced in 2.83, which could see DNS replies

10
src/dhcp-common.c
View File

@@ -281,14 +281,15 @@ static int is_config_in_context(struct dhcp_context *context, struct dhcp_config
if (!context) /* called via find_config() from lease_update_from_configs() */
return 1;
if (!(config->flags & (CONFIG_ADDR | CONFIG_ADDR6)))
return 1;
#ifdef HAVE_DHCP6
if (context->flags & CONTEXT_V6)
{
struct addrlist *addr_list;
if (!(config->flags & CONFIG_ADDR6))
return 1;
if (config->flags & CONFIG_ADDR6)
for (; context; context = context->current)
for (addr_list = config->addr6; addr_list; addr_list = addr_list->next)
{
@@ -302,9 +303,6 @@ static int is_config_in_context(struct dhcp_context *context, struct dhcp_config
else
#endif
{
if (!(config->flags & CONFIG_ADDR))
return 1;
for (; context; context = context->current)
if ((config->flags & CONFIG_ADDR) && is_same_net(config->addr, context->start, context->netmask))
return 1;