[Dnsmasq-discuss] inconsistence between dhcp-hosts and dhcp-hostsfile

[Simon Kelley]

Andreas,

If you can easily build dnsmasq from source, please could you try 
applying the patch below, and see if that fixes the problem?


Cheers,

Simon.


diff --git a/src/dnsmasq.c b/src/dnsmasq.c
index 62a9e59..9c37e5a 100644
--- a/src/dnsmasq.c
+++ b/src/dnsmasq.c
@@ -1777,9 +1777,9 @@ void clear_cache_and_reload(time_t now)
  #ifdef HAVE_DHCP
    if (daemon->dhcp || daemon->doing_dhcp6)
      {
+      reread_dhcp();
        if (option_bool(OPT_ETHERS))
         dhcp_read_ethers();
-      reread_dhcp();
        dhcp_update_configs(daemon->dhcp_conf);
        lease_update_from_configs();
        lease_update_file(now);


On 6/27/25 15:26, Andreas Kuropka via Dnsmasq-discuss wrote:
> I am using dnsmasq 2.91 un a Raspberry Pi 5 (Arch Linux Arm). To declutter my config I have moved my dhcp-hosts to a dhcp-hostsfile and found an inconsistency.
> 
> While in the config a declaration such as dhcp-hosts=AA:BB:CC:DD:EE:FF,set:name still considers the settings in the system hosts/ethers-file for IP-assignment a declaration in a hostsfile of AA:BB:CC:DD:EE:FF,set:name gives the device a new IP (.42 instead of .11) and logs:
> 
> Jun 27 16:05:17 raspberry dnsmasq-dhcp[419]: Name iPhone wurde dem DHCP-Lease von 192.168.188.42 nicht zugewiesen, da der Name in /etc/hosts bereits mit Adresse 192.168.188.11 existiert
> 
> Aside of the IP everything works, dhcp-options defined in an optsfile are respected. This would confirm MAC-address is correct (it was also copied/pasted while transferring to new files).
> 
> Adding the desired IP to the dhcp-hostsfile (AA:BB:CC:DD:EE:FF,set:name,1.2.3.4) resolves the problem but this would be a double configuration. Also, there's then a warning logged:
> 
> Jun 27 16:21:28 raspberry dnsmasq-dhcp[410]: doppelte IP-Adresse 192.168.188.15 (iphone12) in "dhcp-config"-Anweisung
> 
> Please have a look, thank y
> 
> 
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