package/network/services/dnsmasq/patches/0030-Fix-entries-in-etc-hosts-disabling-static-leases.patch

   1 From 18eac67c0a15b673c8d27002c248651b308093e4 Mon Sep 17 00:00:00 2001
   2 From: Steven Siloti <ssiloti@gmail.com>
   3 Date: Sun, 13 Jan 2019 22:56:36 +0000
   4 Subject: [PATCH 30/32] Fix entries in /etc/hosts disabling static leases.
   5
   6 It is possible for a config entry to have one address family specified by a
   7 dhcp-host directive and the other added from /etc/hosts. This is especially
   8 common on OpenWrt because it uses odhcpd for DHCPv6 and IPv6 leases are
   9 imported into dnsmasq via a hosts file.
  10
  11 To handle this case there need to be separate *_HOSTS flags for IPv4 and IPv6.
  12 Otherwise when the hosts file is reloaded it will clear the CONFIG_ADDR(6) flag
  13 which was set by the dhcp-host directive.
  14
  15 Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
  16 ---
  17  src/dhcp-common.c | 8 ++++++--
  18  src/dnsmasq.h     | 1 +
  19  2 files changed, 7 insertions(+), 2 deletions(-)
  20
  21 --- a/src/dhcp-common.c
  22 +++ b/src/dhcp-common.c
  23 @@ -372,7 +372,11 @@ void dhcp_update_configs(struct dhcp_con
  24
  25    for (config = configs; config; config = config->next)
  26      if (config->flags & CONFIG_ADDR_HOSTS)
  27 -      config->flags &= ~(CONFIG_ADDR | CONFIG_ADDR6 | CONFIG_ADDR_HOSTS);
  28 +      config->flags &= ~(CONFIG_ADDR | CONFIG_ADDR_HOSTS);
  29 +#ifdef HAVE_DHCP6
  30 +    if (config->flags & CONFIG_ADDR6_HOSTS)
  31 +      config->flags &= ~(CONFIG_ADDR6 | CONFIG_ADDR6_HOSTS);
  32 +#endif
  33
  34  #ifdef HAVE_DHCP6
  35   again:
  36 @@ -421,7 +425,7 @@ void dhcp_update_configs(struct dhcp_con
  37                 (!(conf_tmp = config_find_by_address6(configs, &crec->addr.addr6, 128, 0)) || conf_tmp == config))
  38               {
  39                 memcpy(&config->addr6, &crec->addr.addr6, IN6ADDRSZ);
  40 -               config->flags |= CONFIG_ADDR6 | CONFIG_ADDR_HOSTS;
  41 +               config->flags |= CONFIG_ADDR6 | CONFIG_ADDR6_HOSTS;
  42                 continue;
  43               }
  44  #endif
  45 --- a/src/dnsmasq.h
  46 +++ b/src/dnsmasq.h
  47 @@ -789,6 +789,7 @@ struct dhcp_config {
  48  #define CONFIG_BANK           2048    /* from dhcp hosts file */
  49  #define CONFIG_ADDR6          4096
  50  #define CONFIG_WILDCARD       8192
  51 +#define CONFIG_ADDR6_HOSTS   16384    /* address added by from /etc/hosts */
  52
  53  struct dhcp_opt {
  54    int opt, len, flags;