Config option: specify ethernet interface

Added optional config setting to allow people to specify ethernet interface. Defaults to eth0.
mattlongman · Apr 23, 2023 · 36536f3 · 36536f3
1 parent 5db13bd
commit 36536f3
Show file tree

Hide file tree

Showing 4 changed files with 17 additions and 3 deletions.
diff --git a/README.md b/README.md
@@ -24,6 +24,7 @@ Please add
 - **netmask** (**required**): Subnet mask of the network
 - **broadcast** (**required**): Broadcast address of the network
 - **interface** (_optional_): Which wlan card to use. Default: wlan0
+- **eth_interface** (_optional_): Which ethernet interface to use. Default: eth0
 - **hide_ssid** (_optional_): Whether SSID is visible or hidden. 0 = visible, 1 = hidden. Defaults to visible
 - **dhcp** (_optional_): Enable or disable DHCP server. 0 = disable, 1 = enable. Defaults to disabled
 - **dhcp_start_addr** (_optional_): Start address for DHCP range. Required if DHCP enabled

diff --git a/hassio-access-point/CHANGELOG.md b/hassio-access-point/CHANGELOG.md
@@ -6,6 +6,11 @@
 - Error: "wlan0: Could not connect to kernel driver" - https://raspberrypi.stackexchange.com/a/88297
 - **If anyone has any knowledge relating to the underlying modules, or just wants to assist with testing this addon, please get in touch, submit PRs, etc.**
 
+## [0.4.5] - 2023-04-23
+
+### Added
+- Optional config option to specify ethernet interface. Defaults to eth0.
+
 ## [0.4.4] - 2022-12-20
 
 ### Fixed

diff --git a/hassio-access-point/config.json b/hassio-access-point/config.json
@@ -1,6 +1,6 @@
 {
   "name": "Hass.io Access Point",
-  "version": "0.4.4",
+  "version": "0.4.5",
   "slug": "hassio-access-point",
   "description": "Create a WiFi access point to directly connect devices to Home Assistant",
   "arch": ["armhf", "armv7", "aarch64", "amd64", "i386"],
@@ -22,6 +22,7 @@
     "netmask": "255.255.255.0",
     "broadcast": "192.168.99.255",
     "interface": "wlan0",
+    "eth_interface": "eth0",
     "hide_ssid": "0",
     "dhcp": "0",
     "dhcp_start_addr": "192.168.99.10",
@@ -42,6 +43,7 @@
     "netmask": "str",
     "broadcast": "str",
     "interface": "str",
+    "eth_interface": "str",
     "hide_ssid": "int",
     "dhcp": "int",
     "dhcp_start_addr": "str",

diff --git a/hassio-access-point/run.sh b/hassio-access-point/run.sh
@@ -27,6 +27,7 @@ ADDRESS=$(jq --raw-output ".address" $CONFIG_PATH)
 NETMASK=$(jq --raw-output ".netmask" $CONFIG_PATH)
 BROADCAST=$(jq --raw-output ".broadcast" $CONFIG_PATH)
 INTERFACE=$(jq --raw-output ".interface" $CONFIG_PATH)
+ETH_INTERFACE=$(jq --raw-output ".eth_interface" $CONFIG_PATH)
 HIDE_SSID=$(jq --raw-output ".hide_ssid" $CONFIG_PATH)
 DHCP=$(jq --raw-output ".dhcp" $CONFIG_PATH)
 DHCP_START_ADDR=$(jq --raw-output ".dhcp_start_addr" $CONFIG_PATH)
@@ -45,6 +46,11 @@ if [ ${#INTERFACE} -eq 0 ]; then
     INTERFACE="wlan0"
 fi
 
+# Set eth_interface as eth0 if not specified in config
+if [ ${#ETH_INTERFACE} -eq 0 ]; then
+    INTERFACE="eth0"
+fi
+
 # Set debug as 0 if not specified in config
 if [ ${#DEBUG} -eq 0 ]; then
     DEBUG=0
@@ -214,7 +220,7 @@ if [ $DHCP -eq 1 ]; then
     if [ $CLIENT_INTERNET_ACCESS -eq 1 ]; then
 
         ## Route traffic
-        iptables-nft -t nat -A POSTROUTING -o eth0 -j MASQUERADE
+        iptables-nft -t nat -A POSTROUTING -o $ETH_INTERFACE -j MASQUERADE
         iptables-nft -P FORWARD ACCEPT
         iptables-nft -F FORWARD
     fi
@@ -224,7 +230,7 @@ else
     ## No DHCP == No DNS. Must be set manually on client.
     ## Step 1: Routing
     if [ $CLIENT_INTERNET_ACCESS -eq 1 ]; then
-        iptables-nft -t nat -A POSTROUTING -o eth0 -j MASQUERADE
+        iptables-nft -t nat -A POSTROUTING -o $ETH_INTERFACE -j MASQUERADE
         iptables-nft -P FORWARD ACCEPT
         iptables-nft -F FORWARD
     fi