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AK: Add IPv4Address::netmask_from_cidr
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36676a1604
Notes:
sideshowbarker
2024-07-17 10:10:18 +09:00
Author: https://github.com/sppmacd Commit: https://github.com/SerenityOS/serenity/commit/36676a1604 Pull-request: https://github.com/SerenityOS/serenity/pull/13259 Reviewed-by: https://github.com/AtkinsSJ ✅ Reviewed-by: https://github.com/IdanHo
@ -119,6 +119,13 @@ public:
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return IPv4Address(a, b, c, d);
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return IPv4Address(a, b, c, d);
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}
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}
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static constexpr IPv4Address netmask_from_cidr(int cidr)
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{
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VERIFY(cidr >= 0 && cidr <= 32);
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u32 value = 0xffffffffull << (32 - cidr);
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return IPv4Address((value & 0xff000000) >> 24, (value & 0xff0000) >> 16, (value & 0xff00) >> 8, (value & 0xff));
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}
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constexpr in_addr_t to_in_addr_t() const { return m_data; }
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constexpr in_addr_t to_in_addr_t() const { return m_data; }
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constexpr u32 to_u32() const { return m_data; }
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constexpr u32 to_u32() const { return m_data; }
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@ -1,5 +1,5 @@
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/*
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/*
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* Copyright (c) 2020, the SerenityOS developers.
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* Copyright (c) 2020-2022, the SerenityOS developers.
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*
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*
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* SPDX-License-Identifier: BSD-2-Clause
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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*/
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@ -151,3 +151,16 @@ TEST_CASE(should_compare)
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EXPECT(addr_a != addr_b);
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EXPECT(addr_a != addr_b);
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EXPECT(addr_a == addr_a);
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EXPECT(addr_a == addr_a);
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}
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}
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TEST_CASE(netmask_from_cidr)
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{
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EXPECT(IPv4Address::netmask_from_cidr(24) == IPv4Address(255, 255, 255, 0));
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EXPECT(IPv4Address::netmask_from_cidr(0) == IPv4Address(0, 0, 0, 0));
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EXPECT(IPv4Address::netmask_from_cidr(32) == IPv4Address(255, 255, 255, 255));
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EXPECT(IPv4Address::netmask_from_cidr(28) == IPv4Address(255, 255, 255, 240));
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EXPECT(IPv4Address::netmask_from_cidr(22) == IPv4Address(255, 255, 252, 0));
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EXPECT(IPv4Address::netmask_from_cidr(14) == IPv4Address(255, 252, 0, 0));
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EXPECT(IPv4Address::netmask_from_cidr(6) == IPv4Address(252, 0, 0, 0));
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}
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