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//! This module contains the tools and functions to dealing with Mechanisms found within an Spf DNS record.
//!
//! The Mechanism struct stores information about the `mechanism` or `modifier` found in the string representation
//! of the `Spf` record. It contains a number of methods for transversing and accessing this data.
//!
//! The module also contains a number of ways to create the `Mechanism` instances.
//! - [`ParsedMechanism`]
//! - This provides a unified method for parsing any mechanism string. It will either contain a `Mechanism<String>`
//! or a `Mechanism<IpNetwork>` if the string is successfully parsed.
//! - Both `Mechanism<String>` and `Mechanism<IpNetwork>` have the `FromStr` trait implemented. Allowing for the strings
//! to be `parsed()`
//! - The `Mechanism` struct also has a number of specific methods which can be used to create related mechanisms; which are
//! used with the `FromStr` trait.
//!
mod errors;
mod kind;
mod parsedmechanism;
mod qualifier;
#[cfg(test)]
mod tests;
pub use crate::mechanism::errors::MechanismError;
pub use crate::mechanism::kind::Kind;
pub use crate::mechanism::parsedmechanism::ParsedMechanism;
pub use crate::mechanism::qualifier::Qualifier;
use crate::helpers;
use ipnetwork::{IpNetwork, IpNetworkError};
use std::{convert::TryFrom, str::FromStr};
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
/// Stores its [`Kind`], [`Qualifier`], and its `Value`
#[derive(Default, Debug, Clone, PartialEq)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct Mechanism<T> {
kind: Kind,
qualifier: Qualifier,
rrdata: Option<T>,
}
#[cfg(test)]
#[cfg(feature = "serde")]
mod serde_test {
use super::*;
use serde_json;
#[test]
fn a() {
let a: Mechanism<String> = "a".parse().unwrap();
let json = serde_json::to_string(&a).unwrap();
assert_eq!(
json,
"{\"kind\":\"A\",\"qualifier\":\"Pass\",\"rrdata\":null}"
);
let deserialized: Mechanism<String> = serde_json::from_str(&json).unwrap();
assert_eq!(deserialized, a);
}
#[test]
fn mx() {
let mx = "mx:example.com".parse::<Mechanism<String>>().unwrap();
let json = serde_json::to_string(&mx).unwrap();
assert_eq!(
json,
"{\"kind\":\"MX\",\"qualifier\":\"Pass\",\"rrdata\":\"example.com\"}"
);
let deserialized: Mechanism<String> = serde_json::from_str(&json).unwrap();
assert_eq!(deserialized, mx);
}
}
/// Create a `Mechanism<String>` from the provided string.
///
/// # Examples:
///```rust
/// # use decon_spf::mechanism::Mechanism;
/// let a: Mechanism<String> = "a".parse().unwrap();
/// assert_eq!(a.kind().is_a(), true);
///
/// if let Ok(mx) = "mx".parse::<Mechanism<String>>() {
/// assert_eq!(mx.kind().is_mx(), true);
/// }
/// if let Ok(mx2) = "-mx:example.com".parse::<Mechanism<String>>() {
/// assert_eq!(mx2.qualifier().is_fail(), true);
/// assert_eq!(mx2.to_string(), "-mx:example.com");
/// }
///
///```
impl FromStr for Mechanism<String> {
type Err = MechanismError;
fn from_str(s: &str) -> Result<Mechanism<String>, Self::Err> {
// A String ending with either ':' or "/" is always invalid.
if s.ends_with(':') || s.ends_with('/') {
return Err(MechanismError::InvalidMechanismFormat(s.to_string()));
};
if s.contains("ip4:") || s.contains("ip6:") {
return Err(MechanismError::InvalidMechanismFormat(s.to_string()));
}
let mut m: Option<Mechanism<String>> = None;
if s.contains("redirect=") {
let mut items = s.rsplit('=');
if let Some(rrdata) = items.next() {
m = Some(Mechanism::generic_inclusive(
Kind::Redirect,
Qualifier::Pass,
Some(rrdata.to_string()),
));
}
} else if s.contains("include:") {
let qualifier_and_modified_str = helpers::return_and_remove_qualifier(s, 'i');
if let Some(rrdata) = s.rsplit(':').next() {
m = Some(Mechanism::generic_inclusive(
Kind::Include,
qualifier_and_modified_str.0,
Some(rrdata.to_string()),
));
}
} else if s.ends_with("all") && (s.len() == 3 || s.len() == 4) {
m = Some(Mechanism::all(
helpers::return_and_remove_qualifier(s, 'a').0,
));
} else if let Some(a_mechanism) = helpers::capture_matches(s, Kind::A) {
m = Some(a_mechanism);
} else if let Some(mx_mechanism) = helpers::capture_matches(s, Kind::MX) {
m = Some(mx_mechanism);
} else if let Some(ptr_mechanism) = helpers::capture_matches(s, Kind::Ptr) {
m = Some(ptr_mechanism);
} else if let Some(exists_mechanism) = helpers::capture_matches(s, Kind::Exists) {
if !exists_mechanism.raw().contains('/') {
m = Some(exists_mechanism);
}
}
if let Some(value) = m {
#[cfg(feature = "strict-dns")]
{
if !helpers::dns_is_valid(helpers::get_domain_before_slash(&value.raw())) {
return Err(MechanismError::InvalidDomainHost(value.raw()));
}
}
return Ok(value);
}
Err(MechanismError::InvalidMechanismFormat(s.to_string()))
}
}
impl TryFrom<&str> for Mechanism<String> {
type Error = MechanismError;
fn try_from(s: &str) -> Result<Self, Self::Error> {
Mechanism::from_str(s)
}
}
/// Create a `Mechanism<IpNetwork>` from the provided string.
///
/// # Examples:
///```rust
/// # use decon_spf::mechanism::{Mechanism, MechanismError};
/// # use ipnetwork::IpNetwork;
/// let ip4: Mechanism<IpNetwork> = "ip4:203.32.160.0/24".parse().unwrap();
/// assert_eq!(ip4.kind().is_ip_v4(), true);
///
/// let ip6 = "ip6:2001:4860:4000::/36".parse::<Mechanism<IpNetwork>>().unwrap();
/// assert_eq!(ip6.kind().is_ip_v6(), true);
///
/// let bad_ip4: Result<Mechanism<IpNetwork>, MechanismError> = "ip4:203.32.160.0/33".parse();
/// assert_eq!(bad_ip4.unwrap_err().to_string(), "invalid address: 203.32.160.0/33");
///
/// let ip6_but_ip4: Result<Mechanism<IpNetwork>, MechanismError> = "ip6:203.32.160.0/24".parse();
/// let err = ip6_but_ip4.unwrap_err();
/// assert_eq!(err, MechanismError::NotIP6Network("203.32.160.0/24".to_string()));
/// assert_eq!(err.to_string(), "203.32.160.0/24 is not an ip6 network");
///```
impl FromStr for Mechanism<IpNetwork> {
type Err = MechanismError;
fn from_str(s: &str) -> Result<Mechanism<IpNetwork>, Self::Err> {
if s.contains("ip4:") || s.contains("ip6:") {
let mut kind = Kind::IpV4;
let mut raw_ip: Option<&str> = None;
let qualifier_and_modified_str = helpers::return_and_remove_qualifier(s, 'i');
if qualifier_and_modified_str.1.contains("ip4") {
kind = Kind::IpV4;
raw_ip = qualifier_and_modified_str.1.strip_prefix("ip4:");
} else if qualifier_and_modified_str.1.contains("ip6") {
kind = Kind::IpV6;
raw_ip = qualifier_and_modified_str.1.strip_prefix("ip6:")
};
// Consider changing this to if let Some() = {}
let parsed = raw_ip.unwrap().parse();
if let Ok(parsed_ip) = parsed {
let ip: IpNetwork = parsed_ip;
if ip.is_ipv4() && kind.is_ip_v4() {
return Ok(Mechanism::generic_inclusive(
kind,
qualifier_and_modified_str.0,
Some(ip),
));
} else if ip.is_ipv4() && !kind.is_ip_v4() {
return Err(MechanismError::NotIP6Network(ip.to_string()));
} else if ip.is_ipv6() && kind.is_ip_v6() {
return Ok(Mechanism::generic_inclusive(
kind,
qualifier_and_modified_str.0,
Some(ip),
));
} else if ip.is_ipv6() && !kind.is_ip_v6() {
return Err(MechanismError::NotIP4Network(ip.to_string()));
};
} else {
return Err(MechanismError::InvalidIPNetwork(
parsed.unwrap_err().to_string(),
));
};
}
// Catch all. This is not an ip4 or ip6 spf string.
Err(MechanismError::InvalidMechanismFormat(s.to_string()))
}
}
impl TryFrom<&str> for Mechanism<IpNetwork> {
type Error = MechanismError;
fn try_from(s: &str) -> Result<Self, Self::Error> {
Mechanism::from_str(s)
}
}
impl<T> Mechanism<T> {
//! These are the generic methods for the struct of Mechanism.
//! All the following methods can be used on any struct of type Mechanism.
#[doc(hidden)]
pub fn generic_inclusive(kind: Kind, qualifier: Qualifier, mechanism: Option<T>) -> Self {
Self {
kind,
qualifier,
rrdata: mechanism,
}
}
#[doc(hidden)]
pub fn new(kind: Kind, qualifier: Qualifier) -> Self {
Self {
kind,
qualifier,
rrdata: None,
}
}
/// Check mechanism is pass
pub fn is_pass(&self) -> bool {
self.qualifier == Qualifier::Pass
}
/// check mechanism is fail
pub fn is_fail(&self) -> bool {
self.qualifier == Qualifier::Fail
}
/// Check mechanism is softfail
pub fn is_softfail(&self) -> bool {
self.qualifier == Qualifier::SoftFail
}
/// Check mechanism is neutral
pub fn is_neutral(&self) -> bool {
self.qualifier == Qualifier::Neutral
}
/// Returns a reference to the Mechanism's Kind
pub fn kind(&self) -> &Kind {
&self.kind
}
/// Returns a reference to the Mechanism's Qualifier
pub fn qualifier(&self) -> &Qualifier {
&self.qualifier
}
/// Returns a reference to the Mechanism's Value.
/// This could return a `String`, `IpNetwork`, or `None`
pub fn mechanism(&self) -> &Option<T> {
&self.rrdata
}
}
impl Mechanism<String> {
/// Create a new Mechanism struct of `Redirect`
#[deprecated(note = "This will be depreciated in 0.3.0. Please use `redirect()` instead")]
pub fn new_redirect(qualifier: Qualifier, mechanism: String) -> Self {
Mechanism::generic_inclusive(Kind::Redirect, qualifier, Some(mechanism))
}
/// Create a new Mechanism struct of `Redirect`
pub fn redirect(qualifier: Qualifier, rrdata: &str) -> Result<Self, MechanismError> {
Ok(Mechanism::new(Kind::Redirect, qualifier).with_rrdata(rrdata)?)
}
/// Create a new Mechanism struct of `A` with no string value.
#[deprecated(note = "This will be depreciated in 0.3.0. Please use `a()` instead")]
pub fn new_a_without_mechanism(qualifier: Qualifier) -> Self {
Mechanism::generic_inclusive(Kind::A, qualifier, None)
}
/// Create a new Mechanism struct of `A` with string value.
#[deprecated(
note = "This will be depreciated in 0.3.0. Please use `a().with_rrdata()` instead"
)]
pub fn new_a_with_mechanism(qualifier: Qualifier, mechanism: String) -> Self {
Mechanism::generic_inclusive(Kind::A, qualifier, Some(mechanism))
}
/// Create a new Mechanism struct of `A`
///
/// # Example:
/// ```
/// use decon_spf::mechanism::Qualifier;
/// use decon_spf::mechanism::Mechanism;
/// # #[cfg(feature = "strict-dns")]
/// # use decon_spf::mechanism::MechanismError;
/// // New `A` without rrdata.
/// let m = Mechanism::new_a_without_mechanism(Qualifier::Pass);
/// assert_eq!(m.kind().is_a(), true);
/// assert_eq!(m.raw(), "a".to_string());
/// assert_eq!(m.mechanism().is_none(), true);
/// // Create `A` with rrdata
/// if let Ok(m_with_rrdata) = Mechanism::a(Qualifier::Pass)
/// .with_rrdata("example.com") {
/// assert_eq!(m_with_rrdata.raw(), "example.com".to_string());
/// assert_eq!(m_with_rrdata.to_string(), "a:example.com".to_string());
/// }
/// // Create `A` with bad rrdata and `strict-dns` is disabled
/// if let Ok(bad_rrdata) = Mechanism::a(Qualifier::Pass)
/// .with_rrdata("example.xx") {
/// assert_eq!(bad_rrdata.raw(), "example.xx".to_string());
/// assert_eq!(bad_rrdata.to_string(), "a:example.xx".to_string());
/// }
/// // Create `A` with bad rrdata and `strict-dns` is enabled
/// # #[cfg(feature = "strict-dns")] {
/// if let Err(bad_rrdata) = Mechanism::a(Qualifier::Pass)
/// .with_rrdata("example.xx") {
/// assert_eq!(bad_rrdata, MechanismError::InvalidDomainHost("example.xx".to_string()));
/// }
/// # }
///```
pub fn a(qualifier: Qualifier) -> Self {
Mechanism::new(Kind::A, qualifier)
}
/// Create a new Mechanism struct of `MX` without string value.
#[deprecated(note = "This will be depreciated in 0.3.0. Please use `mx()` instead")]
pub fn new_mx_without_mechanism(qualifier: Qualifier) -> Self {
Mechanism::generic_inclusive(Kind::MX, qualifier, None)
}
/// Create a new Mechanism struct of `MX`
#[deprecated(
note = "This will be depreciated in 0.3.0. Please use `mx().with_rrdata()` instead"
)]
pub fn new_mx_with_mechanism(qualifier: Qualifier, mechanism: String) -> Self {
Mechanism::generic_inclusive(Kind::MX, qualifier, Some(mechanism))
}
/// Create a new Mechanism struct of `MX`
///
/// # Example:
/// ```rust
/// use decon_spf::mechanism::Qualifier;
/// use decon_spf::mechanism::Mechanism;
/// // without rrdata
/// let mx = Mechanism::mx(Qualifier::Pass);
/// assert_eq!(mx.kind().is_mx(), true);
/// assert_eq!(mx.raw(), "mx");
/// // with rrdata
/// if let Ok(mx) = Mechanism::mx(Qualifier::Pass)
/// .with_rrdata("example.com") {
/// assert_eq!(mx.kind().is_mx(), true);
/// assert_eq!(mx.raw(), "example.com".to_string());
/// assert_eq!(mx.to_string(), "mx:example.com".to_string());
/// }
/// ```
pub fn mx(qualifier: Qualifier) -> Self {
Mechanism::new(Kind::MX, qualifier)
}
/// Create a new Mechanism struct of `Include`
#[deprecated(note = "This will be depreciated in 0.3.0. Please use `include()` instead")]
pub fn new_include(qualifier: Qualifier, mechanism: String) -> Self {
Mechanism::generic_inclusive(Kind::Include, qualifier, Some(mechanism))
}
/// Create a new Mechanism struct of `Include`
/// # Example:
/// ```rust
/// use decon_spf::mechanism::Qualifier;
/// use decon_spf::mechanism::Mechanism;
/// let include = Mechanism::include(Qualifier::Pass,
/// "example.com").unwrap();
/// assert_eq!(include.qualifier().as_str(), "");
/// assert_eq!(include.raw(), "example.com");
/// assert_eq!(include.to_string(), "include:example.com");
/// let include2 = Mechanism::include(Qualifier::SoftFail,
/// "example.com").unwrap();
/// assert_eq!(include2.to_string(), "~include:example.com")
/// ```
pub fn include(qualifier: Qualifier, rrdata: &str) -> Result<Self, MechanismError> {
Ok(Mechanism::new(Kind::Include, qualifier).with_rrdata(rrdata)?)
}
/// Create a new Mechanism struct of `Ptr` with no value
#[deprecated(note = "This will be depreciated in 0.3.0. Please use `ptr()` instead")]
pub fn new_ptr_without_mechanism(qualifier: Qualifier) -> Self {
Mechanism::generic_inclusive(Kind::Ptr, qualifier, None)
}
/// Create a new Mechanism struct of `Ptr`
#[deprecated(
note = "This will be depreciated in 0.3.0. Please use `ptr().with_rrdata()` instead"
)]
pub fn new_ptr_with_mechanism(qualifier: Qualifier, mechanism: String) -> Self {
Mechanism::generic_inclusive(Kind::Ptr, qualifier, Some(mechanism))
}
/// Create a new Mechanism struct of `Ptr`
/// # Example:
/// ```rust
/// use decon_spf::mechanism::Qualifier;
/// use decon_spf::mechanism::Mechanism;
/// // without rrdata
/// let ptr = Mechanism::ptr(Qualifier::Fail);
/// assert_eq!(ptr.to_string(), "-ptr");
/// // with rrdata
/// let ptr = Mechanism::ptr(Qualifier::Fail)
/// .with_rrdata("example.com").unwrap();
/// assert_eq!(ptr.to_string(), "-ptr:example.com");
/// ```
pub fn ptr(qualifier: Qualifier) -> Self {
Mechanism::new(Kind::Ptr, qualifier)
}
/// Create a new Mechanism struct of `Exists`
#[deprecated(
note = "This will be depreciated in 0.3.0. Please use `exists().with_rrdata()` instead"
)]
pub fn new_exists(qualifier: Qualifier, mechanism: String) -> Self {
Mechanism::generic_inclusive(Kind::Exists, qualifier, Some(mechanism))
}
/// Create a new Mechanism struct of `Exists`
pub fn exists(qualifier: Qualifier, rrdata: &str) -> Result<Self, MechanismError> {
Ok(Mechanism::new(Kind::Exists, qualifier).with_rrdata(rrdata)?)
}
/// Set the rrdata for Mechanism
/// # Note: This is only applicable for Mechanisms of `A`, `MX` and `Ptr`.
/// All other Mechanism types require `rrdata` to be set. That is to say that `rrdata` is
/// **optional** for `A`, `MX` and `PTR`
/// See: [`a`](Mechanism<String>::a) for an example.
pub fn with_rrdata(mut self, rrdata: impl Into<String>) -> Result<Self, MechanismError> {
let rrdata_string = rrdata.into();
#[cfg(feature = "strict-dns")]
{
match self.kind() {
Kind::A | Kind::MX | Kind::Include | Kind::Ptr | Kind::Exists => {
if !helpers::dns_is_valid(helpers::get_domain_before_slash(
rrdata_string.as_str(),
)) {
return Err(MechanismError::InvalidDomainHost(rrdata_string));
};
}
_ => {}
};
}
match self.kind() {
// Ensure that `All` is always None even if with_rrdata() is called
Kind::All => self.rrdata = None,
_ => self.rrdata = Some(rrdata_string),
}
Ok(self)
}
/// Create a new Mechanism struct of `All`
#[deprecated(note = "This will be depreciated in 0.3.0. Please use `all()` instead")]
pub fn new_all(qualifier: Qualifier) -> Self {
Mechanism::new(Kind::All, qualifier)
}
/// Create a new Mechanism struct of `All`
pub fn all(qualifier: Qualifier) -> Self {
Mechanism::new(Kind::All, qualifier)
}
/// Return the mechanism string stored in the `Mechanism`
///
/// # Example:
/// ```
/// use decon_spf::mechanism::Qualifier;
/// use decon_spf::mechanism::Mechanism;
/// let mechanism_a = Mechanism::new_a_without_mechanism(Qualifier::Neutral);
/// assert_eq!(mechanism_a.raw(), "a");
/// let mechanism_a_string = Mechanism::new_a_with_mechanism(Qualifier::Neutral,
/// String::from("example.com"));
/// assert_eq!(mechanism_a_string.raw(), "example.com");
/// ```
pub fn raw(&self) -> String {
if self.rrdata.is_none() {
self.kind().to_string()
} else {
self.rrdata.as_ref().unwrap().to_string()
}
}
fn build_string(&self) -> String {
let mut mechanism_str = String::new();
let tmp_mechanism_str;
if self.qualifier != Qualifier::Pass {
mechanism_str.push_str(self.qualifier.as_str());
};
mechanism_str.push_str(self.kind().as_str());
if let Some(ref rrdata) = self.rrdata {
tmp_mechanism_str = rrdata.as_str();
} else {
tmp_mechanism_str = "";
}
match self.kind {
Kind::A | Kind::MX => {
// This must be starting with 'domain.com' So prepend ':'
if !tmp_mechanism_str.is_empty() && !tmp_mechanism_str.starts_with('/') {
mechanism_str.push(':')
}
}
Kind::Ptr => {
// This Ptr has a domain. Prepend ':'
if !tmp_mechanism_str.is_empty() {
mechanism_str.push(':')
}
}
// Do nothing in all other cases.
_ => {}
}
mechanism_str.push_str(tmp_mechanism_str);
mechanism_str
}
}
/// Provide to_string for `Mechanism<String>`
impl std::fmt::Display for Mechanism<String> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.build_string())
}
}
impl From<IpNetworkError> for MechanismError {
fn from(err: IpNetworkError) -> Self {
MechanismError::InvalidIPNetwork(err.to_string())
}
}
impl Mechanism<IpNetwork> {
/// Create a new V4 or V6 `Mechanism<IpNetwork>`
#[deprecated(note = "This will be depreciated in 0.3.0. Please use `ip()` instead")]
pub fn new_ip(qualifier: Qualifier, mechanism: IpNetwork) -> Mechanism<IpNetwork> {
Mechanism::ip(qualifier, mechanism)
}
/// Create a new V4 or V6 Mechanism from a string representation.
///```
/// # use decon_spf::mechanism::{Mechanism, MechanismError};
/// let string = "+ip4:203.32.160.0/24";
/// if let Ok(m) = Mechanism::ip_from_string(&string) {
/// assert_eq!(m.raw(), "203.32.160.0/24");
/// assert_eq!(m.to_string(), "ip4:203.32.160.0/24");
/// }
///```
pub fn ip_from_string(string: &str) -> Result<Mechanism<IpNetwork>, MechanismError> {
Ok(Mechanism::<IpNetwork>::from_str(string)?)
}
/// Create a new V4 or V6 `Mechanism<IpNetwork>`
/// Will correctly set its `kind` based on the `IpNetwork` type.
///
/// # Examples:
/// ```
/// # use ipnetwork::IpNetwork;
/// use decon_spf::mechanism::{Mechanism, Qualifier};
///
/// // Requires: use ipnetwork::IpNetwork;
/// let ip: IpNetwork = "192.168.11.0/24".parse().unwrap();
/// let mechanism = Mechanism::ip(Qualifier::Pass, ip);
/// assert_eq!(mechanism.kind().is_ip_v4(), true);
/// assert_eq!(mechanism.raw(), "192.168.11.0/24".to_string());
/// assert_eq!(mechanism.as_network().to_string(), "192.168.11.0/24".to_string());
/// assert_eq!(mechanism.as_network().prefix(), 24);
///
/// // This section does not require use of ipnetwork::IpNetwork;
/// let mechanism_ip4 = Mechanism::ip(Qualifier::Pass,
/// "203.32.160.0/23".parse().unwrap());
/// assert_eq!(mechanism_ip4.kind().is_ip(), true);
/// assert_eq!(mechanism_ip4.kind().is_ip_v4(), true);
/// assert_eq!(mechanism_ip4.to_string(), "ip4:203.32.160.0/23".to_string());
/// let mechanism_ip6 = Mechanism::ip(Qualifier::Pass,
/// "2001:4860:4000::/36".parse().unwrap());
/// assert_eq!(mechanism_ip6.kind().is_ip(), true);
/// assert_eq!(mechanism_ip6.kind().is_ip_v6(),true);
/// assert_eq!(mechanism_ip6.to_string(), "ip6:2001:4860:4000::/36".to_string());
///```
pub fn ip(qualifier: Qualifier, rrdata: IpNetwork) -> Mechanism<IpNetwork> {
if rrdata.is_ipv4() {
Mechanism::ip4(qualifier, rrdata)
} else {
Mechanism::ip6(qualifier, rrdata)
}
}
/// Create a new Mechanism<IpNetwork> of IP4
#[doc(hidden)]
#[allow(dead_code)]
#[deprecated(note = "This will be depreciated in 0.3.0. Please use `ip4()` instead")]
fn new_ip4(qualifier: Qualifier, mechanism: IpNetwork) -> Self {
Mechanism::generic_inclusive(Kind::IpV4, qualifier, Some(mechanism))
}
/// Create a new Mechanism<IpNetwork> of IP4
fn ip4(qualifier: Qualifier, rrdata: IpNetwork) -> Self {
Mechanism::generic_inclusive(Kind::IpV4, qualifier, Some(rrdata))
}
/// Create a new Mechanism<IpNetwork> of IP6
#[doc(hidden)]
#[allow(dead_code)]
#[deprecated(note = "This will be depreciated in 0.3.0. Please use `ip6()` instead")]
fn new_ip6(qualifier: Qualifier, mechanism: IpNetwork) -> Self {
Mechanism::generic_inclusive(Kind::IpV6, qualifier, Some(mechanism))
}
/// Create a new Mechanism<IpNetwork> of IP6
fn ip6(qualifier: Qualifier, rrdata: IpNetwork) -> Self {
Mechanism::generic_inclusive(Kind::IpV6, qualifier, Some(rrdata))
}
/// Returns the simple string representation of the mechanism
/// # Example
///
///```
/// use ipnetwork::IpNetwork;
/// use decon_spf::mechanism::Qualifier;
/// use decon_spf::mechanism::Mechanism;
/// let ip: IpNetwork = "192.168.11.0/24".parse().unwrap();
/// let ip_mechanism = Mechanism::ip(Qualifier::Pass, ip);
/// assert_eq!(ip_mechanism.raw(), "192.168.11.0/24");
/// assert_eq!(ip_mechanism.kind().is_ip(), true);
///```
///
pub fn raw(&self) -> String {
Self::sanitize_ip_addr(self.rrdata.as_ref().expect("Missing IpNetwork"))
}
fn build_string(&self) -> String {
let mut ip_mechanism_str = String::new();
if self.qualifier != Qualifier::Pass {
ip_mechanism_str.push_str(self.qualifier.as_str());
};
ip_mechanism_str.push_str(self.kind().as_str());
let ip = self.rrdata.as_ref().unwrap();
let ip_str = Self::sanitize_ip_addr(ip);
ip_mechanism_str.push_str(ip_str.as_str());
ip_mechanism_str
}
// IpNetwork contains a prefix of /32 or /128 for Ip4 and I6 respectively.
// This happens when the ip address provided does not contain a prefix.
// This means we need to strip this out before returning the string representation
fn sanitize_ip_addr(ip: &IpNetwork) -> String {
let ip_binding = ip.to_string();
match ip.is_ipv4() {
true => match ip.prefix() {
32 => ip.network().to_string(),
_ => ip_binding,
},
false => match ip.prefix() {
128 => ip.network().to_string(),
_ => ip_binding,
},
}
}
/// Returns a reference to the mechanism as an `IpNetwork`
pub fn as_network(&self) -> &IpNetwork {
self.rrdata.as_ref().unwrap()
}
}
/// Provide to_string for `Mechanism<IpNetwork`>
impl std::fmt::Display for Mechanism<IpNetwork> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.build_string())
}
}