Improve network checks
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672e866897
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e86b29c03a
@ -43,14 +43,6 @@ pub struct NetworkDomainXML {
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pub name: String,
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}
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fn invalid_prefix() -> u32 {
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u32::MAX
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}
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fn invalid_ip() -> IpAddr {
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IpAddr::V4(Ipv4Addr::BROADCAST)
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}
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/// Network ip information
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#[derive(serde::Serialize, serde::Deserialize, Debug)]
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#[serde(rename = "ip")]
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@ -60,12 +52,13 @@ pub struct NetworkIPXML {
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#[serde(rename = "@address")]
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pub address: IpAddr,
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/// Network Prefix
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#[serde(rename = "@prefix", default = "invalid_prefix")]
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pub prefix: u32,
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#[serde(rename = "@prefix")]
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pub prefix: Option<u8>,
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/// Network Netmask. This field is never serialized, but because we can't know if LibVirt will
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/// provide us netmask or prefix, we need to handle both of these fields
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#[serde(rename = "@netmask", default = "invalid_ip", skip_serializing)]
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pub netmask: IpAddr,
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#[serde(rename = "@netmask", skip_serializing)]
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pub netmask: Option<IpAddr>,
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pub dhcp: Option<NetworkDHCPXML>,
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}
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@ -3,6 +3,7 @@ use crate::libvirt_lib_structures::XMLUuid;
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use crate::libvirt_rest_structures::LibVirtStructError::StructureExtraction;
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use crate::nat::nat_definition::Nat;
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use crate::nat::nat_lib;
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use crate::utils::net_utils;
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use crate::utils::net_utils::{extract_ipv4, extract_ipv6};
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use ipnetwork::{Ipv4Network, Ipv6Network};
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use lazy_regex::regex;
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@ -31,7 +32,7 @@ pub struct IPv4DHCPConfig {
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#[derive(serde::Serialize, serde::Deserialize, Clone, Debug)]
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pub struct IPV4Config {
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pub bridge_address: Ipv4Addr,
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pub prefix: u32,
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pub prefix: u8,
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pub dhcp: Option<IPv4DHCPConfig>,
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pub nat: Option<Vec<Nat<Ipv4Addr>>>,
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}
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@ -52,7 +53,7 @@ pub struct IPv6DHCPConfig {
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#[derive(serde::Serialize, serde::Deserialize, Clone, Debug)]
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pub struct IPV6Config {
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pub bridge_address: Ipv6Addr,
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pub prefix: u32,
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pub prefix: u8,
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pub dhcp: Option<IPv6DHCPConfig>,
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pub nat: Option<Vec<Nat<Ipv6Addr>>>,
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}
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@ -115,18 +116,26 @@ impl NetworkInfo {
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let mut ips = Vec::with_capacity(2);
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if let Some(ipv4) = &self.ip_v4 {
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if ipv4.prefix > 32 {
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if !net_utils::is_ipv4_mask_valid(ipv4.prefix) {
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return Err(StructureExtraction("IPv4 prefix is invalid!").into());
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}
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if let Some(nat) = &ipv4.nat {
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for n in nat {
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n.check()?;
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}
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}
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ips.push(NetworkIPXML {
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family: "ipv4".to_string(),
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address: IpAddr::V4(ipv4.bridge_address),
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prefix: ipv4.prefix,
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netmask: Ipv4Network::new(ipv4.bridge_address, ipv4.prefix as u8)
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.unwrap()
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.mask()
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.into(),
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prefix: Some(ipv4.prefix),
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netmask: Some(
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Ipv4Network::new(ipv4.bridge_address, ipv4.prefix)
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.unwrap()
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.mask()
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.into(),
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),
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dhcp: ipv4.dhcp.as_ref().map(|dhcp| NetworkDHCPXML {
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range: NetworkDHCPRangeXML {
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start: IpAddr::V4(dhcp.start),
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@ -146,14 +155,26 @@ impl NetworkInfo {
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}
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if let Some(ipv6) = &self.ip_v6 {
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if !net_utils::is_ipv6_mask_valid(ipv6.prefix) {
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return Err(StructureExtraction("IPv6 prefix is invalid!").into());
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}
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if let Some(nat) = &ipv6.nat {
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for n in nat {
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n.check()?;
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}
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}
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ips.push(NetworkIPXML {
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family: "ipv6".to_string(),
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address: IpAddr::V6(ipv6.bridge_address),
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prefix: ipv6.prefix,
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netmask: Ipv6Network::new(ipv6.bridge_address, ipv6.prefix as u8)
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.unwrap()
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.mask()
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.into(),
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prefix: Some(ipv6.prefix),
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netmask: Some(
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Ipv6Network::new(ipv6.bridge_address, ipv6.prefix)
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.unwrap()
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.mask()
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.into(),
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),
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dhcp: ipv6.dhcp.as_ref().map(|dhcp| NetworkDHCPXML {
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range: NetworkDHCPRangeXML {
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start: IpAddr::V6(dhcp.start),
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@ -226,10 +247,9 @@ impl NetworkInfo {
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.map(|i| IPV4Config {
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bridge_address: extract_ipv4(i.address),
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prefix: match i.prefix {
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u32::MAX => ipnetwork::ipv4_mask_to_prefix(extract_ipv4(i.netmask))
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.expect("Failed to convert IPv4 netmask to network")
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as u32,
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p => p,
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None => ipnetwork::ipv4_mask_to_prefix(extract_ipv4(i.netmask.unwrap()))
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.expect("Failed to convert IPv4 netmask to network"),
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Some(p) => p,
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},
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dhcp: i.dhcp.as_ref().map(|d| IPv4DHCPConfig {
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start: extract_ipv4(d.range.start),
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@ -253,10 +273,9 @@ impl NetworkInfo {
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.map(|i| IPV6Config {
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bridge_address: extract_ipv6(i.address),
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prefix: match i.prefix {
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u32::MAX => ipnetwork::ipv6_mask_to_prefix(extract_ipv6(i.netmask))
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.expect("Failed to convert IPv6 netmask to network")
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as u32,
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p => p,
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None => ipnetwork::ipv6_mask_to_prefix(extract_ipv6(i.netmask.unwrap()))
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.expect("Failed to convert IPv6 netmask to network"),
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Some(p) => p,
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},
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dhcp: i.dhcp.as_ref().map(|d| IPv6DHCPConfig {
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start: extract_ipv6(d.range.start),
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@ -1,5 +1,12 @@
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use crate::utils::net_utils;
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use std::net::{Ipv4Addr, Ipv6Addr};
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#[derive(thiserror::Error, Debug)]
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enum NatDefError {
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#[error("Invalid nat definition: {0}")]
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InvalidNatDef(&'static str),
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}
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#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
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#[serde(tag = "type", rename_all = "lowercase")]
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pub enum NatSource<IPv> {
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@ -31,6 +38,36 @@ pub struct Nat<IPv> {
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pub comment: Option<String>,
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}
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impl<IPv> Nat<IPv> {
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pub fn check(&self) -> anyhow::Result<()> {
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if let NatSource::Interface { name } = &self.host_addr {
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if !net_utils::is_net_interface_name_valid(name) {
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return Err(NatDefError::InvalidNatDef("Invalid nat interface name!").into());
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}
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}
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if let NatHostPort::Range { start, end } = &self.host_port {
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if *start == 0 {
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return Err(NatDefError::InvalidNatDef("Invalid start range!").into());
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}
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if start > end {
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return Err(NatDefError::InvalidNatDef("Invalid port range!").into());
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}
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if u16::MAX - (end - start) < self.guest_port {
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return Err(NatDefError::InvalidNatDef("Guest port is too high!").into());
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}
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}
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if self.guest_port == 0 {
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return Err(NatDefError::InvalidNatDef("Invalid guest port!").into());
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}
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Ok(())
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}
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}
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#[derive(Debug, Clone, serde::Serialize, serde::Deserialize, Default)]
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pub struct NetNat {
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pub interface: String,
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@ -47,10 +47,15 @@ pub fn is_mac_address_valid<D: AsRef<str>>(mac: D) -> bool {
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lazy_regex::regex!("^([a-fA-F0-9]{2}[:-]){5}[a-fA-F0-9]{2}$").is_match(mac.as_ref())
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}
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pub fn is_net_interface_name_valid<D: AsRef<str>>(int: D) -> bool {
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lazy_regex::regex!("^[a-zA-Z0-9]+$").is_match(int.as_ref())
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}
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#[cfg(test)]
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mod tests {
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use crate::utils::net_utils::{
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is_ipv4_address_valid, is_ipv6_address_valid, is_mac_address_valid, is_mask_valid,
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is_net_interface_name_valid,
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};
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#[test]
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@ -98,4 +103,13 @@ mod tests {
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assert!(is_mask_valid(6, 128));
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assert!(!is_mask_valid(6, 129));
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}
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#[test]
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fn test_is_net_interface_name_valid() {
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assert!(is_net_interface_name_valid("eth0"));
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assert!(is_net_interface_name_valid("enp0s25"));
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assert!(!is_net_interface_name_valid("enp0s25 "));
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assert!(!is_net_interface_name_valid("@enp0s25 "));
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}
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}
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