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Code Issues Releases Activity

Remove unnecessary heap allocations in local IP check

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Gylesie 2024-12-02 01:22:04 +01:00 committed by GitHub
parent c62fc9d05b
commit ed536a85ad
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1 changed files with 5 additions and 5 deletions
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10
src/NzbDrone.Common/Extensions/IpAddressExtensions.cs
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@ -39,18 +39,18 @@ public static bool IsLocalAddress(this IPAddress ipAddress)
private static bool IsLocalIPv4(byte[] ipv4Bytes) private static bool IsLocalIPv4(byte[] ipv4Bytes)
{ {
// Link local (no IP assigned by DHCP): 169.254.0.0 to 169.254.255.255 (169.254.0.0/16) // Link local (no IP assigned by DHCP): 169.254.0.0 to 169.254.255.255 (169.254.0.0/16)
bool IsLinkLocal() => ipv4Bytes[0] == 169 && ipv4Bytes[1] == 254; var isLinkLocal = ipv4Bytes[0] == 169 && ipv4Bytes[1] == 254;
// Class A private range: 10.0.0.0 – 10.255.255.255 (10.0.0.0/8) // Class A private range: 10.0.0.0 – 10.255.255.255 (10.0.0.0/8)
bool IsClassA() => ipv4Bytes[0] == 10; var isClassA = ipv4Bytes[0] == 10;
// Class B private range: 172.16.0.0 – 172.31.255.255 (172.16.0.0/12) // Class B private range: 172.16.0.0 – 172.31.255.255 (172.16.0.0/12)
bool IsClassB() => ipv4Bytes[0] == 172 && ipv4Bytes[1] >= 16 && ipv4Bytes[1] <= 31; var isClassB = ipv4Bytes[0] == 172 && ipv4Bytes[1] >= 16 && ipv4Bytes[1] <= 31;
// Class C private range: 192.168.0.0 – 192.168.255.255 (192.168.0.0/16) // Class C private range: 192.168.0.0 – 192.168.255.255 (192.168.0.0/16)
bool IsClassC() => ipv4Bytes[0] == 192 && ipv4Bytes[1] == 168; var isClassC = ipv4Bytes[0] == 192 && ipv4Bytes[1] == 168;
return IsLinkLocal() || IsClassA() || IsClassC() || IsClassB(); return isLinkLocal || isClassA || isClassC || isClassB;
} }
public static bool IsCgnatIpAddress(this IPAddress ipAddress) public static bool IsCgnatIpAddress(this IPAddress ipAddress)