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IP: fix minor errors, expand network categorization utilities.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,148 @@ | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // Copyright Network Geographics 2014 | ||
| /** @file | ||
| Shared utilities for IP address classes. | ||
| */ | ||
|
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| #pragma once | ||
| #include <netinet/in.h> | ||
|
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| #include "swoc/swoc_version.h" | ||
|
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| // These have to be global namespace, unfortunately. | ||
| inline bool | ||
| operator==(in6_addr const& lhs, in6_addr const& rhs) { | ||
| return 0 == memcmp(&lhs, &rhs, sizeof(in6_addr)); | ||
| } | ||
|
|
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| inline bool | ||
| operator!=(in6_addr const& lhs, in6_addr const& rhs) { | ||
| return 0 != memcmp(&lhs, &rhs, sizeof(in6_addr)); | ||
| } | ||
|
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| namespace swoc { inline namespace SWOC_VERSION_NS { | ||
|
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| /// Internal IP address utilities. | ||
| namespace ip { | ||
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| inline bool is_loopback_host_order(in_addr_t addr) { | ||
| return (addr & 0xFF000000) == 0x7F000000; | ||
| } | ||
|
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| inline bool is_link_local_host_order(in_addr_t addr) { | ||
| return (addr & 0xFFFF0000) == 0xA9FE0000; // 169.254.0.0/16 | ||
| } | ||
|
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| inline bool is_multicast_host_order(in_addr_t addr) { | ||
| return IN_MULTICAST(addr); | ||
| } | ||
|
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| inline bool is_private_host_order(in_addr_t addr) { | ||
| return (((addr & 0xFF000000) == 0x0A000000) || // 10.0.0.0/8 | ||
| ((addr & 0xFFC00000) == 0x64400000) || // 100.64.0.0/10 | ||
| ((addr & 0xFFF00000) == 0xAC100000) || // 172.16.0.0/12 | ||
| ((addr & 0xFFFF0000) == 0xC0A80000) // 192.168.0.0/16 | ||
| ); | ||
| } | ||
|
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||
| // There really is no "host order" for IPv6, so only the network order utilities are defined. | ||
| // @c IP6Addr uses an idiosyncratic ordering for performance, not really useful to expose to | ||
| // clients. | ||
|
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| inline bool is_loopback_network_order(in6_addr const& addr) { | ||
| return addr == in6addr_loopback; | ||
| } | ||
|
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| inline bool is_multicast_network_order(in6_addr const& addr) { | ||
| return addr.s6_addr[0] == 0xFF; | ||
| } | ||
|
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| inline bool is_link_local_network_order(in6_addr const& addr) { | ||
| return addr.s6_addr[0] == 0xFE && (addr.s6_addr[1] & 0xC0) == 0x80; // fe80::/10 | ||
| } | ||
|
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| inline bool is_private_network_order(in6_addr const& addr) { | ||
| return (addr.s6_addr[0] & 0xFE) == 0xFC; // fc00::/7 | ||
| } | ||
|
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| #if BYTE_ORDER == LITTLE_ENDIAN | ||
|
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| inline bool is_loopback_network_order(in_addr_t addr) { | ||
| return (addr & 0xFF) == 0x7F; | ||
| } | ||
|
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| inline bool is_private_network_order(in_addr_t addr) { | ||
| return (((addr & 0xFF) == 0x0A) || // 10.0.0.0/8 | ||
| ((addr & 0xC0FF) == 0x4064) || // 100.64.0.0/10 | ||
| ((addr & 0xF0FF) == 0x10AC) || // 172.16.0.0/12 | ||
| ((addr & 0xFFFF) == 0xA8C0) // 192.168.0.0/16 | ||
| ); | ||
| } | ||
|
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| inline bool is_link_local_network_order(in_addr_t addr) { | ||
| return (addr & 0xFFFF) == 0xFEA9; // 169.254.0.0/16 | ||
| } | ||
|
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| inline bool is_multicast_network_order(in_addr_t addr) { | ||
| return (addr & 0xF0) == 0xE0; | ||
| } | ||
|
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| #else | ||
|
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| inline bool is_loopback_network_order(in_addr_t addr) { | ||
| return is_loopback_host_order(addr); | ||
| } | ||
|
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| inline bool is_link_local_network_order(inaddr_t addr) { | ||
| return is_link_local_host_order(addr); | ||
| } | ||
|
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| inline bool is_private_network_order(in_addr_t addr) { | ||
| return is_link_local_host_order(addr); | ||
| } | ||
|
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| inline bool is_multicast_network_order(in_addr_t addr) { | ||
| return is_multicast_host_order(addr); | ||
| } | ||
|
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| #endif | ||
|
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| /** Check if the address in a socket address is a loopback address.. | ||
| * @return @c true if so, @c false if not. | ||
| */ | ||
| inline bool is_loopback(sockaddr const * sa) { | ||
| return ( sa->sa_family == AF_INET && is_loopback_network_order(reinterpret_cast<sockaddr_in const *>(sa)->sin_addr.s_addr)) || | ||
| ( sa->sa_family == AF_INET6 && is_loopback_network_order(reinterpret_cast<sockaddr_in6 const *>(sa)->sin6_addr)) | ||
| ; | ||
| } | ||
|
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| /** Check if the address in a socket address is multicast. | ||
| * @return @c true if so, @c false if not. | ||
| */ | ||
| inline bool is_multicast(sockaddr const * sa) { | ||
| return ( sa->sa_family == AF_INET && is_multicast_network_order(reinterpret_cast<sockaddr_in const *>(sa)->sin_addr.s_addr)) || | ||
| ( sa->sa_family == AF_INET6 && is_multicast_network_order(reinterpret_cast<sockaddr_in6 const *>(sa)->sin6_addr)) | ||
| ; | ||
| } | ||
|
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| /** Check if the IP address in a socket address is link local. | ||
| * @return @c true if link local, @c false if not. | ||
| */ | ||
| inline bool is_link_local(sockaddr const* sa) { | ||
| return ( sa->sa_family == AF_INET && is_link_local_network_order(reinterpret_cast<sockaddr_in const *>(sa)->sin_addr.s_addr)) || | ||
| ( sa->sa_family == AF_INET6 && is_link_local_network_order(reinterpret_cast<sockaddr_in6 const *>(sa)->sin6_addr)) | ||
| ; | ||
| } | ||
|
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| /** Check if the IP address in a socket address is private (non-routable) | ||
| * @return @c true if private, @c false if not. | ||
| */ | ||
| inline bool is_private(sockaddr const* sa) { | ||
| return ( sa->sa_family == AF_INET && is_private_network_order(reinterpret_cast<sockaddr_in const *>(sa)->sin_addr.s_addr)) || | ||
| ( sa->sa_family == AF_INET6 && is_private_network_order(reinterpret_cast<sockaddr_in6 const *>(sa)->sin6_addr)) | ||
| ; | ||
| } | ||
|
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| } // hnamespace ip | ||
|
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||
| }} // namespace swoc::SWOC_VERSION_NS |
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