From b63204eb116d500b8e91988d3a1c17b2f244584b Mon Sep 17 00:00:00 2001
From: Tobias Schwarz <info@tobias-schwarz.com>
Date: Sun, 6 Aug 2023 13:08:16 +0000
Subject: [PATCH] dhcp: add options for static leases, custom domain names and
 olsrd-services

---
 DEVELOPER.md                                  | 50 +++++++++++++++++++
 .../templates/corerouter/config/dhcp.j2       | 22 ++++++++
 .../templates/corerouter/config/olsrd.j2      | 10 ++++
 3 files changed, 82 insertions(+)

diff --git a/DEVELOPER.md b/DEVELOPER.md
index 7afc7596c..9017b8df6 100644
--- a/DEVELOPER.md
+++ b/DEVELOPER.md
@@ -246,6 +246,56 @@ airos_dfs_reset:
     daytime_limit: "2-7"
 ```
 
+#### dhcp.yml
+
+This optional file allows to set static dhcp leases and custom domain names. The syntax is as follows:
+
+```yml
+---
+dhcp_static_leases:
+  - name: hostname1
+    mac: AA:AA:AA:AA:AA:AA
+    ip: 10.10.10.1
+  - name: hostname2
+    mac: BB:BB:BB:BB:BB:BB
+    ip: 10.10.10.2
+    dns: 1
+  - name: webcam1
+    mac: CC:CC:CC:CC:CC:CC
+    ip: 10.10.10.3
+    dns: 1
+    olsrd_nameservice: 1
+  - name: webcam2
+    mac: DD:DD:DD:DD:DD:DD
+    ip: 10.10.10.4
+    dns: 1
+    olsrd_nameservice: 1
+
+dhcp_custom_domain_names:
+  - name: unifi
+    ip: 10.10.10.2
+```
+
+A hostname, mac address and ip is required. The option `dns: 1` ensures that the entry is added without the `.lan` suffix.
+The option `olsrd_nameservice` also announces the host via the olsrd nameservice, which is useful for olsrd services.
+
+#### olsrd.yml
+
+This optional file allows to announce services via olsrd. The syntax is as follows:
+
+```yml
+---
+olsrd_services:
+  - name: Webcam 1
+    protocol: tcp
+    url: http://webcam1.olsr:80/
+  - name: Webcam 2
+    protocol: tcp
+    url: http://webcam2.olsr:80/
+```
+
+The name, protocol and URL are mandatory. The name has a length constraint of 75 characters. Special chars should not be used.
+
 ## host_vars/
 
 The `host-vars`-dir contains a host directory for every OpenWrt-device.
diff --git a/roles/cfg_openwrt/templates/corerouter/config/dhcp.j2 b/roles/cfg_openwrt/templates/corerouter/config/dhcp.j2
index dacbcdf4e..2e044b1b9 100644
--- a/roles/cfg_openwrt/templates/corerouter/config/dhcp.j2
+++ b/roles/cfg_openwrt/templates/corerouter/config/dhcp.j2
@@ -75,3 +75,25 @@ config odhcpd 'odhcpd'
 	option leasefile '/tmp/hosts/odhcpd'
 	option leasetrigger '/usr/sbin/odhcpd-update'
 	option loglevel '4'
+
+{% for dhcp_static_lease in dhcp_static_leases | default([]) %}
+{% if dhcp_static_lease['name'] is defined and dhcp_static_lease['mac'] is defined and dhcp_static_lease['ip'] is defined %}
+config host
+        option name '{{ dhcp_static_lease['name'] }}'
+        option mac '{{ dhcp_static_lease['mac'] }}'
+        option ip '{{ dhcp_static_lease['ip'] }}'
+    {% if dhcp_static_lease['dns'] is defined %}
+        option dns '{{ dhcp_static_lease['dns'] }}'
+    {% endif %}
+
+{% endif %}
+{% endfor %}
+
+{% for dhcp_custom_domain_name in dhcp_custom_domain_names | default([]) %}
+{% if dhcp_custom_domain_name['name'] is defined and dhcp_custom_domain_name['ip'] is defined %}
+config domain
+        option name '{{ dhcp_custom_domain_name['name'] }}'
+        option ip '{{ dhcp_custom_domain_name['ip'] }}'
+
+{% endif %}
+{% endfor %}
diff --git a/roles/cfg_openwrt/templates/corerouter/config/olsrd.j2 b/roles/cfg_openwrt/templates/corerouter/config/olsrd.j2
index 59880bdc4..903052350 100644
--- a/roles/cfg_openwrt/templates/corerouter/config/olsrd.j2
+++ b/roles/cfg_openwrt/templates/corerouter/config/olsrd.j2
@@ -13,6 +13,16 @@ config LoadPlugin
 	list hosts '{{ network['prefix'] | ansible.utils.ipaddr(ip_num) | ansible.utils.ipaddr('address') }} {{ host }}'
   {% endfor %}
 {% endfor %}
+{% for dhcp_static_lease in dhcp_static_leases | default([]) %}
+{% if dhcp_static_lease['name'] is defined and dhcp_static_lease['ip'] is defined and dhcp_static_lease['olsrd_nameservice'] is defined and dhcp_static_lease['olsrd_nameservice'] == 1 %}
+        list hosts '{{ dhcp_static_lease['ip'] }} {{ dhcp_static_lease['name'] }}'
+{% endif %}
+{% endfor %}
+{% for olsrd_service in olsrd_services | default([]) %}
+  {% if olsrd_service['url'] is defined and olsrd_service['protocol'] is defined and olsrd_service['name'] is defined and olsrd_service['url'] | regex_search('.*\\|.*') is none and olsrd_service['protocol'] | regex_search('^(tcp|udp)$') is defined and olsrd_service['name'] | regex_search('^[a-zA-Z0-9 \-]{1,75}$') is defined %}
+        list service '{{ olsrd_service['url'] }}|{{ olsrd_service['protocol'] }}|{{ olsrd_service['name'] }}'
+  {% endif %}
+{% endfor %}
 
 config LoadPlugin
 	option accept '0.0.0.0'