It is possible for a config entry to have one address family specified by a
dhcp-host directive and the other added from /etc/hosts. This is especially
common on OpenWrt because it uses odhcpd for DHCPv6 and IPv6 leases are
imported into dnsmasq via a hosts file.
To handle this case there need to be separate *_HOSTS flags for IPv4 and IPv6.
Otherwise when the hosts file is reloaded it will clear the CONFIG_ADDR(6) flag
which was set by the dhcp-host directive.
---
src/dhcp-common.c | 8 ++--
src/dnsmasq.h | 1 +
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/src/dhcp-common.c b/src/dhcp-common.c
index d1254d9..7eb3761 100644
--- a/src/dhcp-common.c
+++ b/src/dhcp-common.c
@@ -372,7 +372,11 @@ void dhcp_update_configs(struct dhcp_config *configs)
for (config = configs; config; config = config->next)
if (config->flags & CONFIG_ADDR_HOSTS)
- config->flags &= ~(CONFIG_ADDR | CONFIG_ADDR6 | CONFIG_ADDR_HOSTS);
+ config->flags &= ~(CONFIG_ADDR | CONFIG_ADDR_HOSTS);
+#ifdef HAVE_DHCP6
+if (config->flags & CONFIG_ADDR6_HOSTS)
+ config->flags &= ~(CONFIG_ADDR6 | CONFIG_ADDR6_HOSTS);
+#endif
#ifdef HAVE_DHCP6
again:
@@ -421,7 +425,7 @@ void dhcp_update_configs(struct dhcp_config *configs)
(!(conf_tmp = config_find_by_address6(configs,
>addr.addr6, 128, 0)) || conf_tmp == config))
{
memcpy(>addr6, >addr.addr6, IN6ADDRSZ);
- config->flags |= CONFIG_ADDR6 | CONFIG_ADDR_HOSTS;
+ config->flags |= CONFIG_ADDR6 | CONFIG_ADDR6_HOSTS;
continue;
}
#endif
diff --git a/src/dnsmasq.h b/src/dnsmasq.h
index 95559c7..0dc1de9 100644
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -789,6 +789,7 @@ struct dhcp_config {
#define CONFIG_BANK 2048/* from dhcp hosts file */
#define CONFIG_ADDR6 4096
#define CONFIG_WILDCARD 8192
+#define CONFIG_ADDR6_HOSTS 16384/* address added by from /etc/hosts */
struct dhcp_opt {
int opt, len, flags;
--
2.20.1
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