Added server support for proxy protocol

rbcs-common/src/main/kotlin/net/woggioni/rbcs/common/Cidr.kt

@@ -0,0 +1,62 @@
+package net.woggioni.rbcs.common
+
+import java.net.InetAddress
+
+data class Cidr private constructor(
+    val networkAddress: InetAddress,
+    val prefixLength: Int
+) {
+    companion object {
+        fun from(cidr: String) : Cidr {
+            val separator = cidr.indexOf("/")
+            if(separator < 0) {
+                throw IllegalArgumentException("Invalid CIDR format: $cidr")
+            }
+            val networkAddress = InetAddress.getByName(cidr.substring(0, separator))
+            val prefixLength = cidr.substring(separator + 1, cidr.length).toInt()
+
+
+            // Validate prefix length
+            val maxPrefix = if (networkAddress.address.size == 4) 32 else 128
+            require(prefixLength in 0..maxPrefix) { "Invalid prefix length: $prefixLength" }
+            return Cidr(networkAddress, prefixLength)
+        }
+    }
+
+    fun contains(address: InetAddress): Boolean {
+        val networkBytes = networkAddress.address
+        val addressBytes = address.address
+
+        if (networkBytes.size != addressBytes.size) {
+            return false
+        }
+
+
+        // Calculate how many full bytes and remaining bits to check
+        val fullBytes = prefixLength / 8
+        val remainingBits = prefixLength % 8
+
+
+        // Check full bytes
+        for (i in 0..<fullBytes) {
+            if (networkBytes[i] != addressBytes[i]) {
+                return false
+            }
+        }
+
+
+        // Check remaining bits if any
+        if (remainingBits > 0 && fullBytes < networkBytes.size) {
+            val mask = (0xFF shl (8 - remainingBits)).toByte()
+            if ((networkBytes[fullBytes].toInt() and mask.toInt()) != (addressBytes[fullBytes].toInt() and mask.toInt())) {
+                return false
+            }
+        }
+
+        return true
+    }
+
+    override fun toString(): String {
+        return networkAddress.hostAddress + "/" + prefixLength
+    }
+}

rbcs-common/src/main/kotlin/net/woggioni/rbcs/common/Logging.kt

@@ -81,9 +81,6 @@ inline fun Logger.log(level: Level, channel: Channel, crossinline messageBuilder
         )
         withMDC(params) {
             val builder = makeLoggingEventBuilder(level)
-//            for ((key, value) in params) {
-//                builder.addKeyValue(key, value)
-//            }
             messageBuilder(builder)
             builder.log()
         }