From a2518740ae26c8cfcf9952322a8cd1b93889efd2 Mon Sep 17 00:00:00 2001
From: Yifan Gu <gyf304@users.noreply.github.com>
Date: Sat, 25 Nov 2023 06:58:55 +0000
Subject: [PATCH] add routines for checking broadcast and multicast

---
 src/ip.cpp | 6 ++++++
 src/ip.h   | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/src/ip.cpp b/src/ip.cpp
index daed37c..896b2ea 100644
--- a/src/ip.cpp
+++ b/src/ip.cpp
@@ -34,6 +34,12 @@ namespace lpvpn::ip {
 		}
 		return ret;
 	}
+	bool Address4::isBroadcast() const {
+		return toUint32() == 0xFFFFFFFF;
+	}
+	bool Address4::isMulticast() const {
+		return (addr[0] & 0xF0) == 0xE0;
+	}
 	bool Address4::operator==(const Address4& other) const {
 		return addr == other.addr;
 	}
diff --git a/src/ip.h b/src/ip.h
index 0fcc3c0..2c3655b 100644
--- a/src/ip.h
+++ b/src/ip.h
@@ -25,6 +25,8 @@ namespace lpvpn::ip {
 		Address4(uint32_t addr);
 		~Address4();
 		uint32_t toUint32() const;
+		bool isBroadcast() const;
+		bool isMulticast() const;
 		bool operator==(const Address4& other) const;
 		Address4 operator+(uint32_t other) const;
 		Address4 operator-(uint32_t other) const;