Pi-Hole/dnsmasq
1
0
Fork 0
mirror of https://github.com/pi-hole/dnsmasq.git synced 2025-12-19 18:28:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add address filtering for leasequery.

Browse Source
This commit is contained in:
Simon Kelley
2025-04-23 16:47:50 +01:00
parent 692ed0dd32
commit 48658ebc54
5 changed files with 41 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
src/rfc2131.c
View File

@@ -1062,8 +1062,24 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
if (leasequery_source.s_addr == 0)
return 0;
daemon->metrics[METRIC_DHCPLEASEQUERY]++;
inet_ntop(AF_INET, &leasequery_source, daemon->workspacename, ADDRSTRLEN);
if (daemon->leasequery_addr)
{
struct bogus_addr *baddrp;
for (baddrp = daemon->leasequery_addr; baddrp; baddrp = baddrp->next)
if (!baddrp->is6 && baddrp->addr.addr4.s_addr == leasequery_source.s_addr)
break;
if (!baddrp)
{
my_syslog(MS_DHCP | LOG_WARNING, _("leasequery from %s not permitted"), daemon->workspacename);
return 0;
}
}
daemon->metrics[METRIC_DHCPLEASEQUERY]++;
log_packet("DHCPLEASEQUERY", mess->ciaddr.s_addr ? &mess->ciaddr : NULL, emac_len != 0 ? emac : NULL, emac_len,
iface_name, "from ", daemon->workspacename, mess->xid);