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#!/bin/sh /etc/rc.common
# Copyright (C) 2025 Brian 'redbeard' Harrington <redbeard@dead-city.org>
# This is free software, licensed under the MIT License
START=99
USE_PROCD=1
PROG=/usr/bin/radius-mac
CONFIG_BASE_DIR="/etc" # Directory for generated .ini files
# Helper to determine the path for the generated .ini file
# $1: section_name (from UCI, e.g., 'default', 'guest_server')
# $2: variable name to store the result (output parameter)
get_cfg_file_path() {
local section_name="$1"
local __result_var="$2"
local cfg_path
if [ "$section_name" = "default" ]; then
cfg_path="$CONFIG_BASE_DIR/radius-mac.ini"
else
cfg_path="$CONFIG_BASE_DIR/radius-mac-$section_name.ini"
fi
eval "$__result_var='$cfg_path'"
}
# Validation helper functions
_log_error() {
logger -t radius-mac-init "Error: $1"
}
_is_valid_number_in_range() {
local val="$1"
local min="$2"
local max="$3"
local context="$4" # For logging
if ! echo "$val" | grep -qE '^[0-9]+$'; then
_log_error "$context: Value '$val' is not a number."
return 1
fi
if [ "$val" -lt "$min" ] || [ "$val" -gt "$max" ]; then
_log_error "$context: Value '$val' is out of range ($min-$max)."
return 1
fi
return 0
}
_is_valid_string_length() {
local val="$1"
local min_len="$2"
local max_len="$3"
local context="$4" # For logging
local len=${#val}
if [ "$len" -lt "$min_len" ] || [ "$len" -gt "$max_len" ]; then
_log_error "$context: Length '$len' is out of range ($min_len-$max_len)."
return 1
fi
return 0
}
_is_valid_ipv4() {
local val="$1"
local context="$2"
# Basic regex, not exhaustive
if ! echo "$val" | grep -qE '^([0-9]{1,3}\.){3}[0-9]{1,3}$'; then
_log_error "$context: Value '$val' is not a valid IPv4 address format."
return 1
fi
# Further checks for valid octets (0-255) could be added here if needed
return 0
}
_is_valid_mac_address() {
local val="$1"
local context="$2"
if ! echo "$val" | grep -qEi '^([0-9a-f]{2}[:-]){5}[0-9a-f]{2}$'; then
_log_error "$context: Value '$val' is not a valid MAC address format."
return 1
fi
return 0
}
# Client callback function for processing radius-mac-client sections
client_cb() {
local client_section="$1" # UCI section name of the client
local server_section_name="$2"
local cfg_file="$3"
local client_server_link mac description vlan
config_get client_server_link "$client_section" server
if [ "$client_server_link" = "$server_section_name" ]; then
config_get mac "$client_section" mac
config_get description "$client_section" description
config_get vlan "$client_section" vlan
# Validate client options
local client_validation_ok=1
[ -z "$mac" ] && { _log_error "Client section '$client_section' for server '$server_section_name': Missing MAC address."; client_validation_ok=0; }
[ -n "$mac" ] && _is_valid_mac_address "$mac" "Client '$client_section' MAC" || client_validation_ok=0
[ -n "$description" ] && _is_valid_string_length "$description" 1 256 "Client '$client_section' description" || client_validation_ok=0
[ -n "$vlan" ] && _is_valid_number_in_range "$vlan" 1 4094 "Client '$client_section' vlan" || client_validation_ok=0
if [ "$client_validation_ok" -eq 1 ] && [ -n "$mac" ]; then
echo "[$mac]" >> "$cfg_file"
[ -n "$description" ] && echo "description=$description" >> "$cfg_file"
[ -n "$vlan" ] && echo "vlan=$vlan" >> "$cfg_file"
echo "" >> "$cfg_file"
else
_log_error "Client section '$client_section' for server '$server_section_name' has validation errors or missing MAC. Skipping."
fi
fi
}
# Generates the .ini file for a given server instance
# $1: server_section_name (UCI section name of the radius-mac-server)
# Returns 0 on success, 1 on critical validation failure for server options
generate_ini_file() {
local server_section_name="$1"
local cfg_file
local address port secret default_vlan
local validation_ok=1
get_cfg_file_path "$server_section_name" cfg_file
# Clear/create the file
> "$cfg_file"
# Server options from radius-mac-server section
config_get address "$server_section_name" address
config_get port "$server_section_name" port
config_get secret "$server_section_name" secret
config_get default_vlan "$server_section_name" default_vlan
# Validate server options
[ -n "$address" ] && _is_valid_ipv4 "$address" "Server '$server_section_name' address" || validation_ok=0
[ -n "$port" ] && _is_valid_number_in_range "$port" 1 65535 "Server '$server_section_name' port" || validation_ok=0
[ -n "$secret" ] && _is_valid_string_length "$secret" 1 256 "Server '$server_section_name' secret" || validation_ok=0
[ -n "$default_vlan" ] && _is_valid_number_in_range "$default_vlan" 1 4094 "Server '$server_section_name' default_vlan" || validation_ok=0
if [ "$validation_ok" -eq 0 ]; then
_log_error "Critical validation failed for server '$server_section_name'. Configuration not generated."
return 1
fi
# Write validated server options
# Ensure required options are present (example: address, port, secret are usually essential)
if [ -z "$address" ] || [ -z "$port" ] || [ -z "$secret" ]; then
_log_error "Server '$server_section_name': Missing one or more required fields (address, port, secret)."
return 1
fi
# Write validated server options with [server] header
echo "[server]" >> "$cfg_file"
echo "address=$address" >> "$cfg_file"
echo "port=$port" >> "$cfg_file"
echo "secret=$secret" >> "$cfg_file"
[ -n "$default_vlan" ] && echo "default_vlan=$default_vlan" >> "$cfg_file"
echo "" >> "$cfg_file" # Blank line
echo "; Clients:" >> "$cfg_file"
echo "" >> "$cfg_file" # Blank line before clients
# Client options from radius-mac-client sections linked to this server
config_foreach client_cb radius-mac-client "$server_section_name" "$cfg_file"
return 0
}
# Callback for starting a single instance, called by config_foreach
# $1: server_section_name (UCI section name of the radius-mac-server)
start_one_instance() {
local section_name="$1"
local cfg_file
local enabled
config_get_bool enabled "$section_name" enabled 1 # Check if the server instance itself is enabled
get_cfg_file_path "$section_name" cfg_file
if [ "$enabled" -eq 0 ]; then
rm -f "$cfg_file" # Clean up config for disabled instance
return 1
fi
if ! generate_ini_file "$section_name"; then
_log_error "Failed to generate configuration for '$section_name' due to validation errors. Instance will not start."
# Ensure potentially partially written or empty file is removed if generation failed critically
rm -f "$cfg_file"
return 1
fi
procd_open_instance "$section_name"
procd_set_param command "$PROG" -c "$cfg_file"
procd_set_param respawn
procd_set_param pidfile "/var/run/radius-mac-$section_name.pid"
procd_close_instance
}
start_service() {
config_load radius-mac
config_foreach start_one_instance radius-mac-server
}
service_triggers() {
procd_add_reload_trigger radius-mac
}
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