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api2/node/dns.rs: implement resolv.conf parser

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This commit is contained in:
Dietmar Maurer
2019-01-24 14:59:40 +01:00
parent 784252dbc5
commit 8f973f8181
4 changed files with 92 additions and 10 deletions
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32
src/tools/common_regex.rs Normal file
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//! Predefined Regular Expressions
//!
//! This is a collection of useful regular expressions
use lazy_static::lazy_static;
#[macro_export]
macro_rules! IPV4OCTET { () => (r"(?:25[0-5]|(?:2[0-4]|1[0-9]|[1-9])?[0-9])") }
#[macro_export]
macro_rules! IPV6H16 { () => (r"(?:[0-9a-fA-F]{1,4})") }
#[macro_export]
macro_rules! IPV6LS32 { () => (concat!(r"(?:(?:", IPV4RE!(), "|", IPV6H16!(), ":", IPV6H16!(), "))" )) }
#[macro_export]
macro_rules! IPV4RE { () => (concat!(r"(?:(?:", IPV4OCTET!(), r"\.){3}", IPV4OCTET!(), ")")) }
#[macro_export]
macro_rules! IPV6RE { () => (concat!(r"(?:",
r"(?:(?:", r"(?:", IPV6H16!(), r":){6})", IPV6LS32!(), r")|",
r"(?:(?:", r"::(?:", IPV6H16!(), r":){5})", IPV6LS32!(), r")|",
r"(?:(?:(?:", IPV6H16!(), r")?::(?:", IPV6H16!(), r":){4})", IPV6LS32!(), r")|",
r"(?:(?:(?:(?:", IPV6H16!(), r":){0,1}", IPV6H16!(), r")?::(?:", IPV6H16!(), r":){3})", IPV6LS32!(), r")|",
r"(?:(?:(?:(?:", IPV6H16!(), r":){0,2}", IPV6H16!(), r")?::(?:", IPV6H16!(), r":){2})", IPV6LS32!(), r")|",
r"(?:(?:(?:(?:", IPV6H16!(), r":){0,3}", IPV6H16!(), r")?::(?:", IPV6H16!(), r":){1})", IPV6LS32!(), r")|",
r"(?:(?:(?:(?:", IPV6H16!(), r":){0,4}", IPV6H16!(), r")?::", ")", IPV6LS32!(), r")|",
r"(?:(?:(?:(?:", IPV6H16!(), r":){0,5}", IPV6H16!(), r")?::", ")", IPV6H16!(), r")|",
r"(?:(?:(?:(?:", IPV6H16!(), r":){0,6}", IPV6H16!(), r")?::", ")))"))
}
#[macro_export]
macro_rules! IPRE { () => (concat!(r"(?:", IPV4RE!(), "|", IPV6RE!(), ")")) }