Merge pull request 'Update Rust crate serde_json to 1.0.115' (#4) from renovate/serde_json-1.x into master

Reviewed-on: #4

.drone.yml

@@ -0,0 +1,52 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+steps:
+- name: web_build
+  image: node:20
+  volumes:
+    - name: web_app
+      path: /tmp/web_build
+  commands:
+  - cd virtweb_frontend
+  - npm install
+  - npm run build
+  - mv dist /tmp/web_build
+
+- name: backend_check
+  image: rust
+  volumes:
+  - name: rust_registry
+    path: /usr/local/cargo/registry
+  commands:
+  - apt update && apt install -y libvirt-dev
+  - rustup component add clippy
+  - cd virtweb_backend
+  - cargo clippy -- -D warnings
+  - cargo test
+
+- name: backend_compile
+  image: rust
+  volumes:
+  - name: rust_registry
+    path: /usr/local/cargo/registry
+  - name: web_app
+    path: /tmp/web_build
+  depends_on:
+  - backend_check
+  - web_build
+  commands:
+  - apt update && apt install -y libvirt-dev
+  - cd virtweb_backend
+  - mv /tmp/web_build/dist static
+  - cargo build --release
+  - ls -lah target/release/virtweb_backend
+
+
+volumes:
+- name: rust_registry
+  temp: {}
+- name: web_app
+  temp: {}

LICENSE

@@ -0,0 +1,674 @@
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+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1,5 +1,5 @@
 # VirtWEB
-WIP project
+Open Source Web interface for LibVirt. Simplify the management of VM.
 
 ## Setup for dev
 Please refer to this guide: [virtweb_docs/SETUP_DEV.md](virtweb_docs/SETUP_DEV.md)

renovate.json

@@ -0,0 +1,9 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "packageRules": [
+    {
+      "matchUpdateTypes": ["major", "minor", "patch"],
+      "automerge": true
+    }
+  ]
+}

virtweb_backend/Cargo.toml

@@ -6,41 +6,42 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-log = "0.4.19"
-env_logger = "0.10.1"
-clap = { version = "4.4.11", features = ["derive", "env"] }
-light-openid = { version = "1.0.1", features = ["crypto-wrapper"] }
+log = "0.4.21"
+env_logger = "0.11.3"
+clap = { version = "4.5.4", features = ["derive", "env"] }
+light-openid = { version = "1.0.2", features = ["crypto-wrapper"] }
 lazy_static = "1.4.0"
-actix = "0.13.1"
-actix-web = "4"
+actix = "0.13.3"
+actix-web = "4.5.1"
 actix-remote-ip = "0.1.0"
-actix-session = { version = "0.8.0", features = ["cookie-session"] }
-actix-identity = "0.6.0"
-actix-cors = "0.6.5"
-actix-files = "0.6.2"
-actix-web-actors = "4.2.0"
-actix-http = "3.4.0"
-serde = { version = "1.0.193", features = ["derive"] }
-serde_json = "1.0.108"
+actix-session = { version = "0.9.0", features = ["cookie-session"] }
+actix-identity = "0.7.1"
+actix-cors = "0.7.0"
+actix-files = "0.6.5"
+actix-web-actors = "4.3.0"
+actix-http = "3.6.0"
+serde = { version = "1.0.197", features = ["derive"] }
+serde_json = "1.0.115"
 quick-xml = { version = "0.31.0", features = ["serialize", "overlapped-lists"] }
-futures-util = "0.3.28"
-anyhow = "1.0.75"
+futures-util = "0.3.30"
+anyhow = "1.0.81"
 actix-multipart = "0.6.1"
-tempfile = "3.8.1"
-reqwest = { version = "0.11.23", features = ["stream"] }
+tempfile = "3.10.1"
+reqwest = { version = "0.12.3", features = ["stream"] }
 url = "2.5.0"
 virt = "0.3.1"
-sysinfo = { version = "0.29.11", features = ["serde"] }
-uuid = { version = "1.6.1", features = ["v4", "serde"] }
+sysinfo = { version = "0.30.8", features = ["serde"] }
+uuid = { version = "1.8.0", features = ["v4", "serde"] }
 lazy-regex = "3.1.0"
-thiserror = "1.0.51"
-image = "0.24.7"
+thiserror = "1.0.58"
+image = "0.25.1"
 rand = "0.8.5"
-bytes = "1.5.0"
-tokio = "1.35.0"
-futures = "0.3.29"
+bytes = "1.6.0"
+tokio = "1.37.0"
+futures = "0.3.30"
 ipnetwork = "0.20.0"
 num = "0.4.1"
-rust-embed = { version = "8.1.0" }
+rust-embed = { version = "8.3.0" }
 mime_guess = "2.0.4"
 dotenvy = "0.15.7"
+nix = { version = "0.28.0", features = ["net"] }

virtweb_backend/src/actors/libvirt_actor.rs

@@ -7,8 +7,9 @@ use crate::libvirt_rest_structures::hypervisor::*;
 use crate::libvirt_rest_structures::net::*;
 use crate::libvirt_rest_structures::nw_filter::{NetworkFilter, NetworkFilterName};
 use crate::libvirt_rest_structures::vm::*;
+use crate::nat::nat_lib;
 use actix::{Actor, Context, Handler, Message};
-use image::ImageOutputFormat;
+use image::ImageFormat;
 use std::io::Cursor;
 use virt::connect::Connect;
 use virt::domain::Domain;
@@ -336,7 +337,7 @@ impl Handler<ScreenshotDomainReq> for LibVirtActor {
 
         let image = image::load_from_memory(&screen_out)?;
         let mut png_out = Cursor::new(Vec::new());
-        image.write_to(&mut png_out, ImageOutputFormat::Png)?;
+        image.write_to(&mut png_out, ImageFormat::Png)?;
 
         Ok(png_out.into_inner())
     }
@@ -395,6 +396,9 @@ impl Handler<DefineNetwork> for LibVirtActor {
         let network = Network::define_xml(&self.m, &network_xml)?;
         let uuid = XMLUuid::parse_from_str(&network.get_uuid_string()?)?;
 
+        // Save NAT definition
+        nat_lib::save_nat_def(&msg.0)?;
+
         // Save a copy of the source definition
         msg.0.uuid = Some(uuid);
         let json = serde_json::to_string(&msg.0)?;
@@ -464,9 +468,12 @@ impl Handler<DeleteNetwork> for LibVirtActor {
     fn handle(&mut self, msg: DeleteNetwork, _ctx: &mut Self::Context) -> Self::Result {
         log::debug!("Delete network: {}\n", msg.0.as_string());
         let network = Network::lookup_by_uuid_string(&self.m, &msg.0.as_string())?;
-        let network_name = network.get_name()?;
+        let network_name = NetworkName(network.get_name()?);
         network.undefine()?;
 
+        // Remove NAT definition, if any
+        nat_lib::remove_nat_def(&network_name)?;
+
         // Remove backup definition
         let backup_definition = AppConfig::get().net_definition_path(&network_name);
         if backup_definition.exists() {

virtweb_backend/src/app_config.rs

@@ -1,4 +1,6 @@
+use crate::constants;
 use crate::libvirt_lib_structures::XMLUuid;
+use crate::libvirt_rest_structures::net::NetworkName;
 use crate::libvirt_rest_structures::nw_filter::NetworkFilterName;
 use clap::Parser;
 use std::net::IpAddr;
@@ -250,8 +252,16 @@ impl AppConfig {
         self.definitions_path().join(format!("vm-{name}.json"))
     }
 
-    pub fn net_definition_path(&self, name: &str) -> PathBuf {
-        self.definitions_path().join(format!("net-{name}.json"))
+    pub fn net_definition_path(&self, name: &NetworkName) -> PathBuf {
+        self.definitions_path().join(format!("net-{}.json", name.0))
+    }
+
+    pub fn nat_path(&self) -> PathBuf {
+        self.storage_path().join(constants::STORAGE_NAT_DIR)
+    }
+
+    pub fn net_nat_path(&self, name: &NetworkName) -> PathBuf {
+        self.nat_path().join(name.nat_file_name())
     }
 
     pub fn net_filter_definition_path(&self, name: &NetworkFilterName) -> PathBuf {

virtweb_backend/src/constants.rs

@@ -44,6 +44,9 @@ pub const DISK_SIZE_MIN: usize = 100;
 /// Disk size max (MB)
 pub const DISK_SIZE_MAX: usize = 1000 * 1000 * 2;
 
+/// Net nat entry comment max size
+pub const NET_NAT_COMMENT_MAX_SIZE: usize = 250;
+
 /// Network mac address default prefix
 pub const NET_MAC_ADDR_PREFIX: &str = "52:54:00";
 
@@ -77,3 +80,12 @@ pub const BUILTIN_NETWORK_FILTER_RULES: [&str; 24] = [
 
 /// List of valid network chains
 pub const NETWORK_CHAINS: [&str; 8] = ["root", "mac", "stp", "vlan", "arp", "rarp", "ipv4", "ipv6"];
+
+/// Directory where nat rules are stored, inside storage directory
+pub const STORAGE_NAT_DIR: &str = "nat";
+
+/// Environment variable that is set to run VirtWeb in NAT configuration mode
+pub const NAT_MODE_ENV_VAR_NAME: &str = "NAT_MODE";
+
+/// Nat hook file path
+pub const NAT_HOOK_PATH: &str = "/etc/libvirt/hooks/network";

virtweb_backend/src/controllers/server_controller.rs

@@ -5,8 +5,10 @@ use crate::constants::{DISK_NAME_MAX_LEN, DISK_NAME_MIN_LEN, DISK_SIZE_MAX, DISK
 use crate::controllers::{HttpResult, LibVirtReq};
 use crate::extractors::local_auth_extractor::LocalAuthEnabled;
 use crate::libvirt_rest_structures::hypervisor::HypervisorInfo;
+use crate::nat::nat_hook;
+use crate::utils::net_utils;
 use actix_web::{HttpResponse, Responder};
-use sysinfo::{NetworksExt, System, SystemExt};
+use sysinfo::{Components, Disks, Networks, System};
 
 #[derive(serde::Serialize)]
 struct StaticConfig {
@@ -43,6 +45,7 @@ struct ServerConstraints {
     disk_size: LenConstraints,
     net_name_size: LenConstraints,
     net_title_size: LenConstraints,
+    net_nat_comment_size: LenConstraints,
     dhcp_reservation_host_name: LenConstraints,
     nwfilter_name_size: LenConstraints,
     nwfilter_comment_size: LenConstraints,
@@ -81,6 +84,10 @@ pub async fn static_config(local_auth: LocalAuthEnabled) -> impl Responder {
 
             net_name_size: LenConstraints { min: 2, max: 50 },
             net_title_size: LenConstraints { min: 0, max: 50 },
+            net_nat_comment_size: LenConstraints {
+                min: 0,
+                max: constants::NET_NAT_COMMENT_MAX_SIZE,
+            },
 
             dhcp_reservation_host_name: LenConstraints { min: 2, max: 250 },
 
@@ -99,18 +106,48 @@ pub async fn static_config(local_auth: LocalAuthEnabled) -> impl Responder {
 struct ServerInfo {
     hypervisor: HypervisorInfo,
     system: System,
+    components: Components,
+    disks: Disks,
+    networks: Networks,
 }
 
 pub async fn server_info(client: LibVirtReq) -> HttpResult {
     let mut system = System::new();
-    system.refresh_disks_list();
-    system.refresh_components_list();
-    system.refresh_networks_list();
     system.refresh_all();
 
+    let mut components = Components::new();
+    components.refresh_list();
+    components.refresh();
+
+    let mut disks = Disks::new();
+    disks.refresh_list();
+    disks.refresh();
+
+    let mut networks = Networks::new();
+    networks.refresh_list();
+    networks.refresh();
+
     Ok(HttpResponse::Ok().json(ServerInfo {
         hypervisor: client.get_info().await?,
         system,
+        components,
+        disks,
+        networks,
+    }))
+}
+
+#[derive(serde::Serialize)]
+struct NetworkHookStatus {
+    installed: bool,
+    content: String,
+    path: &'static str,
+}
+
+pub async fn network_hook_status() -> HttpResult {
+    Ok(HttpResponse::Ok().json(NetworkHookStatus {
+        installed: nat_hook::is_installed()?,
+        content: nat_hook::hook_content()?,
+        path: constants::NAT_HOOK_PATH,
     }))
 }
 
@@ -132,14 +169,5 @@ pub async fn number_vcpus() -> HttpResult {
 }
 
 pub async fn networks_list() -> HttpResult {
-    let mut system = System::new();
-    system.refresh_networks_list();
-
-    Ok(HttpResponse::Ok().json(
-        system
-            .networks()
-            .iter()
-            .map(|n| n.0.to_string())
-            .collect::<Vec<_>>(),
-    ))
+    Ok(HttpResponse::Ok().json(net_utils::net_list()))
 }

virtweb_backend/src/lib.rs

@@ -7,4 +7,5 @@ pub mod libvirt_client;
 pub mod libvirt_lib_structures;
 pub mod libvirt_rest_structures;
 pub mod middlewares;
+pub mod nat;
 pub mod utils;

virtweb_backend/src/libvirt_lib_structures/network.rs

@@ -43,14 +43,6 @@ pub struct NetworkDomainXML {
     pub name: String,
 }
 
-fn invalid_prefix() -> u32 {
-    u32::MAX
-}
-
-fn invalid_ip() -> IpAddr {
-    IpAddr::V4(Ipv4Addr::BROADCAST)
-}
-
 /// Network ip information
 #[derive(serde::Serialize, serde::Deserialize, Debug)]
 #[serde(rename = "ip")]
@@ -60,12 +52,13 @@ pub struct NetworkIPXML {
     #[serde(rename = "@address")]
     pub address: IpAddr,
     /// Network Prefix
-    #[serde(rename = "@prefix", default = "invalid_prefix")]
-    pub prefix: u32,
+    #[serde(rename = "@prefix")]
+    pub prefix: Option<u8>,
     /// Network Netmask. This field is never serialized, but because we can't know if LibVirt will
     /// provide us netmask or prefix, we need to handle both of these fields
-    #[serde(rename = "@netmask", default = "invalid_ip", skip_serializing)]
-    pub netmask: IpAddr,
+    #[serde(rename = "@netmask", skip_serializing)]
+    pub netmask: Option<IpAddr>,
+
     pub dhcp: Option<NetworkDHCPXML>,
 }
 

virtweb_backend/src/libvirt_rest_structures/net.rs

@@ -1,6 +1,9 @@
 use crate::libvirt_lib_structures::network::*;
 use crate::libvirt_lib_structures::XMLUuid;
 use crate::libvirt_rest_structures::LibVirtStructError::StructureExtraction;
+use crate::nat::nat_definition::Nat;
+use crate::nat::nat_lib;
+use crate::utils::net_utils;
 use crate::utils::net_utils::{extract_ipv4, extract_ipv6};
 use ipnetwork::{Ipv4Network, Ipv6Network};
 use lazy_regex::regex;
@@ -21,57 +24,75 @@ pub struct DHCPv4HostReservation {
 
 #[derive(serde::Serialize, serde::Deserialize, Clone, Debug)]
 pub struct IPv4DHCPConfig {
-    start: Ipv4Addr,
-    end: Ipv4Addr,
-    hosts: Vec<DHCPv4HostReservation>,
+    pub start: Ipv4Addr,
+    pub end: Ipv4Addr,
+    pub hosts: Vec<DHCPv4HostReservation>,
 }
 
 #[derive(serde::Serialize, serde::Deserialize, Clone, Debug)]
 pub struct IPV4Config {
-    bridge_address: Ipv4Addr,
-    prefix: u32,
-    dhcp: Option<IPv4DHCPConfig>,
+    pub bridge_address: Ipv4Addr,
+    pub prefix: u8,
+    pub dhcp: Option<IPv4DHCPConfig>,
+    pub nat: Option<Vec<Nat<Ipv4Addr>>>,
 }
 
 #[derive(serde::Serialize, serde::Deserialize, Clone, Debug)]
 pub struct DHCPv6HostReservation {
-    name: String,
-    ip: Ipv6Addr,
+    pub name: String,
+    pub ip: Ipv6Addr,
 }
 
 #[derive(serde::Serialize, serde::Deserialize, Clone, Debug)]
 pub struct IPv6DHCPConfig {
-    start: Ipv6Addr,
-    end: Ipv6Addr,
-    hosts: Vec<DHCPv6HostReservation>,
+    pub start: Ipv6Addr,
+    pub end: Ipv6Addr,
+    pub hosts: Vec<DHCPv6HostReservation>,
 }
 
 #[derive(serde::Serialize, serde::Deserialize, Clone, Debug)]
 pub struct IPV6Config {
-    bridge_address: Ipv6Addr,
-    prefix: u32,
-    dhcp: Option<IPv6DHCPConfig>,
+    pub bridge_address: Ipv6Addr,
+    pub prefix: u8,
+    pub dhcp: Option<IPv6DHCPConfig>,
+    pub nat: Option<Vec<Nat<Ipv6Addr>>>,
+}
+
+#[derive(serde::Serialize, serde::Deserialize, Debug, Clone)]
+pub struct NetworkName(pub String);
+
+impl NetworkName {
+    /// Get the name of the file that will store the NAT configuration of this network
+    pub fn nat_file_name(&self) -> String {
+        format!("nat-{}.json", self.0)
+    }
+}
+
+impl NetworkName {
+    pub fn is_valid(&self) -> bool {
+        regex!("^[a-zA-Z0-9]+$").is_match(&self.0)
+    }
 }
 
 /// Network configuration
 #[derive(serde::Serialize, serde::Deserialize, Clone, Debug)]
 pub struct NetworkInfo {
-    pub name: String,
+    pub name: NetworkName,
     pub uuid: Option<XMLUuid>,
-    title: Option<String>,
-    description: Option<String>,
-    forward_mode: NetworkForwardMode,
-    device: Option<String>,
-    bridge_name: Option<String>,
-    dns_server: Option<Ipv4Addr>,
-    domain: Option<String>,
-    ip_v4: Option<IPV4Config>,
-    ip_v6: Option<IPV6Config>,
+    pub title: Option<String>,
+    pub description: Option<String>,
+    pub forward_mode: NetworkForwardMode,
+    pub device: Option<String>,
+    pub bridge_name: Option<String>,
+    pub dns_server: Option<Ipv4Addr>,
+    pub domain: Option<String>,
+    pub ip_v4: Option<IPV4Config>,
+    pub ip_v6: Option<IPV6Config>,
 }
 
 impl NetworkInfo {
     pub fn as_virt_network(&self) -> anyhow::Result<NetworkXML> {
-        if !regex!("^[a-zA-Z0-9]+$").is_match(&self.name) {
+        if !self.name.is_valid() {
             return Err(StructureExtraction("network name is invalid!").into());
         }
 
@@ -102,18 +123,26 @@ impl NetworkInfo {
         let mut ips = Vec::with_capacity(2);
 
         if let Some(ipv4) = &self.ip_v4 {
-            if ipv4.prefix > 32 {
+            if !net_utils::is_ipv4_mask_valid(ipv4.prefix) {
                 return Err(StructureExtraction("IPv4 prefix is invalid!").into());
             }
 
+            if let Some(nat) = &ipv4.nat {
+                for n in nat {
+                    n.check()?;
+                }
+            }
+
             ips.push(NetworkIPXML {
                 family: "ipv4".to_string(),
                 address: IpAddr::V4(ipv4.bridge_address),
-                prefix: ipv4.prefix,
-                netmask: Ipv4Network::new(ipv4.bridge_address, ipv4.prefix as u8)
-                    .unwrap()
-                    .mask()
-                    .into(),
+                prefix: Some(ipv4.prefix),
+                netmask: Some(
+                    Ipv4Network::new(ipv4.bridge_address, ipv4.prefix)
+                        .unwrap()
+                        .mask()
+                        .into(),
+                ),
                 dhcp: ipv4.dhcp.as_ref().map(|dhcp| NetworkDHCPXML {
                     range: NetworkDHCPRangeXML {
                         start: IpAddr::V4(dhcp.start),
@@ -133,14 +162,26 @@ impl NetworkInfo {
         }
 
         if let Some(ipv6) = &self.ip_v6 {
+            if !net_utils::is_ipv6_mask_valid(ipv6.prefix) {
+                return Err(StructureExtraction("IPv6 prefix is invalid!").into());
+            }
+
+            if let Some(nat) = &ipv6.nat {
+                for n in nat {
+                    n.check()?;
+                }
+            }
+
             ips.push(NetworkIPXML {
                 family: "ipv6".to_string(),
                 address: IpAddr::V6(ipv6.bridge_address),
-                prefix: ipv6.prefix,
-                netmask: Ipv6Network::new(ipv6.bridge_address, ipv6.prefix as u8)
-                    .unwrap()
-                    .mask()
-                    .into(),
+                prefix: Some(ipv6.prefix),
+                netmask: Some(
+                    Ipv6Network::new(ipv6.bridge_address, ipv6.prefix)
+                        .unwrap()
+                        .mask()
+                        .into(),
+                ),
                 dhcp: ipv6.dhcp.as_ref().map(|dhcp| NetworkDHCPXML {
                     range: NetworkDHCPRangeXML {
                         start: IpAddr::V6(dhcp.start),
@@ -160,7 +201,7 @@ impl NetworkInfo {
         }
 
         Ok(NetworkXML {
-            name: self.name.to_string(),
+            name: self.name.0.to_string(),
             uuid: self.uuid,
             title: self.title.clone(),
             description: self.description.clone(),
@@ -183,8 +224,12 @@ impl NetworkInfo {
     }
 
     pub fn from_xml(xml: NetworkXML) -> anyhow::Result<Self> {
+        let name = NetworkName(xml.name);
+
+        let nat = nat_lib::load_nat_def(&name)?;
+
         Ok(Self {
-            name: xml.name,
+            name,
             uuid: xml.uuid,
             title: xml.title,
             description: xml.description,
@@ -209,10 +254,9 @@ impl NetworkInfo {
                 .map(|i| IPV4Config {
                     bridge_address: extract_ipv4(i.address),
                     prefix: match i.prefix {
-                        u32::MAX => ipnetwork::ipv4_mask_to_prefix(extract_ipv4(i.netmask))
-                            .expect("Failed to convert IPv4 netmask to network")
-                            as u32,
-                        p => p,
+                        None => ipnetwork::ipv4_mask_to_prefix(extract_ipv4(i.netmask.unwrap()))
+                            .expect("Failed to convert IPv4 netmask to network"),
+                        Some(p) => p,
                     },
                     dhcp: i.dhcp.as_ref().map(|d| IPv4DHCPConfig {
                         start: extract_ipv4(d.range.start),
@@ -227,6 +271,7 @@ impl NetworkInfo {
                             })
                             .collect(),
                     }),
+                    nat: nat.ipv4,
                 }),
             ip_v6: xml
                 .ips
@@ -235,10 +280,9 @@ impl NetworkInfo {
                 .map(|i| IPV6Config {
                     bridge_address: extract_ipv6(i.address),
                     prefix: match i.prefix {
-                        u32::MAX => ipnetwork::ipv6_mask_to_prefix(extract_ipv6(i.netmask))
-                            .expect("Failed to convert IPv6 netmask to network")
-                            as u32,
-                        p => p,
+                        None => ipnetwork::ipv6_mask_to_prefix(extract_ipv6(i.netmask.unwrap()))
+                            .expect("Failed to convert IPv6 netmask to network"),
+                        Some(p) => p,
                     },
                     dhcp: i.dhcp.as_ref().map(|d| IPv6DHCPConfig {
                         start: extract_ipv6(d.range.start),
@@ -252,7 +296,25 @@ impl NetworkInfo {
                             })
                             .collect(),
                     }),
+                    nat: nat.ipv6,
                 }),
         })
     }
+
+    /// Check if at least one NAT definition was specified on this interface
+    pub fn has_nat_def(&self) -> bool {
+        if let Some(ipv4) = &self.ip_v4 {
+            if ipv4.nat.is_some() {
+                return true;
+            }
+        }
+
+        if let Some(ipv6) = &self.ip_v6 {
+            if ipv6.nat.is_some() {
+                return true;
+            }
+        }
+
+        false
+    }
 }

virtweb_backend/src/main.rs

@@ -27,12 +27,19 @@ use virtweb_backend::controllers::{
 };
 use virtweb_backend::libvirt_client::LibVirtClient;
 use virtweb_backend::middlewares::auth_middleware::AuthChecker;
+use virtweb_backend::nat::nat_conf_mode;
 use virtweb_backend::utils::files_utils;
 
 #[actix_web::main]
 async fn main() -> std::io::Result<()> {
     env_logger::init_from_env(env_logger::Env::new().default_filter_or("info"));
 
+    // Run in NAT configuration mode, if requested
+    if std::env::var(constants::NAT_MODE_ENV_VAR_NAME).is_ok() {
+        nat_conf_mode::sub_main().await.unwrap();
+        return Ok(());
+    }
+
     // Load additional config from file, if requested
     AppConfig::parse_env_file().unwrap();
 
@@ -41,6 +48,7 @@ async fn main() -> std::io::Result<()> {
     files_utils::create_directory_if_missing(AppConfig::get().vnc_sockets_path()).unwrap();
     files_utils::set_file_permission(AppConfig::get().vnc_sockets_path(), 0o777).unwrap();
     files_utils::create_directory_if_missing(AppConfig::get().disks_storage_path()).unwrap();
+    files_utils::create_directory_if_missing(AppConfig::get().nat_path()).unwrap();
     files_utils::create_directory_if_missing(AppConfig::get().definitions_path()).unwrap();
 
     let conn = Data::new(LibVirtClient(
@@ -110,6 +118,10 @@ async fn main() -> std::io::Result<()> {
                 "/api/server/info",
                 web::get().to(server_controller::server_info),
             )
+            .route(
+                "/api/server/network_hook_status",
+                web::get().to(server_controller::network_hook_status),
+            )
             .route(
                 "/api/server/number_vcpus",
                 web::get().to(server_controller::number_vcpus),

virtweb_backend/src/nat/mod.rs

@@ -0,0 +1,4 @@
+pub mod nat_conf_mode;
+pub mod nat_definition;
+pub mod nat_hook;
+pub mod nat_lib;

virtweb_backend/src/nat/nat_conf_mode.rs

@@ -0,0 +1,232 @@
+use crate::constants;
+use crate::libvirt_rest_structures::net::NetworkName;
+use crate::nat::nat_definition::{Nat, NatSourceIP, NetNat};
+use crate::utils::net_utils;
+use clap::Parser;
+use std::collections::HashMap;
+use std::net::IpAddr;
+use std::path::{Path, PathBuf};
+use std::process::{Command, ExitStatus};
+
+#[derive(thiserror::Error, Debug)]
+enum NatConfModeError {
+    #[error("UpdateFirewall failed!")]
+    UpdateFirewall,
+}
+
+/// VirtWeb NAT configuration mode. This executable should never be executed manually
+#[derive(Parser, Debug, Clone)]
+#[clap(author, version, about, long_about = None)]
+struct NatArgs {
+    /// Storage directory
+    #[clap(short, long)]
+    storage: String,
+
+    /// Network name
+    #[clap(short, long)]
+    network_name: String,
+
+    /// Operation
+    #[clap(short, long)]
+    operation: String,
+
+    /// Sub operation
+    #[clap(long)]
+    sub_operation: String,
+}
+
+impl NatArgs {
+    pub fn network_file(&self) -> PathBuf {
+        let network_name = NetworkName(self.network_name.to_string());
+        Path::new(&self.storage)
+            .join(constants::STORAGE_NAT_DIR)
+            .join(network_name.nat_file_name())
+    }
+}
+
+/// NAT sub main function
+pub async fn sub_main() -> anyhow::Result<()> {
+    let args = NatArgs::parse();
+
+    if !args.network_file().exists() {
+        log::warn!("Cannot do anything for the network, because the NAT configuration file does not exixsts!");
+        return Ok(());
+    }
+
+    let conf_json = std::fs::read_to_string(args.network_file())?;
+    let conf: NetNat = serde_json::from_str(&conf_json)?;
+
+    let nic_ips = net_utils::net_list_and_ips()?;
+
+    match (args.operation.as_str(), args.sub_operation.as_str()) {
+        ("started", "begin") => {
+            log::info!("Enable port forwarding for network");
+            trigger_nat_forwarding(true, &conf, &nic_ips).await?
+        }
+        ("stopped", "end") => {
+            log::info!("Disable port forwarding for network");
+            trigger_nat_forwarding(false, &conf, &nic_ips).await?
+        }
+        _ => log::debug!(
+            "Operation {} - {} not supported",
+            args.operation,
+            args.sub_operation
+        ),
+    }
+
+    Ok(())
+}
+
+async fn trigger_nat_forwarding(
+    enable: bool,
+    conf: &NetNat,
+    nic_ips: &HashMap<String, Vec<IpAddr>>,
+) -> anyhow::Result<()> {
+    if let Some(ipv4) = &conf.ipv4 {
+        trigger_nat_forwarding_nat_ipv(
+            enable,
+            &conf.interface,
+            &ipv4.iter().map(|i| i.generalize()).collect::<Vec<_>>(),
+            nic_ips,
+        )
+        .await?;
+    }
+
+    if let Some(ipv6) = &conf.ipv6 {
+        trigger_nat_forwarding_nat_ipv(
+            enable,
+            &conf.interface,
+            &ipv6.iter().map(|i| i.generalize()).collect::<Vec<_>>(),
+            nic_ips,
+        )
+        .await?;
+    }
+
+    Ok(())
+}
+
+async fn trigger_nat_forwarding_nat_ipv(
+    enable: bool,
+    net_interface: &str,
+    rules: &[Nat<IpAddr>],
+    nic_ips: &HashMap<String, Vec<IpAddr>>,
+) -> anyhow::Result<()> {
+    for r in rules {
+        let host_ips = match &r.host_ip {
+            NatSourceIP::Interface { name } => nic_ips.get(name).cloned().unwrap_or_default(),
+            NatSourceIP::Ip { ip } => vec![*ip],
+        };
+
+        for host_ip in host_ips {
+            let mut guest_port = r.guest_port;
+            for host_port in r.host_port.as_seq() {
+                if r.protocol.has_tcp() {
+                    toggle_port_forwarding(
+                        enable,
+                        false,
+                        host_ip,
+                        host_port,
+                        net_interface,
+                        r.guest_ip,
+                        guest_port,
+                    )?
+                }
+
+                if r.protocol.has_udp() {
+                    toggle_port_forwarding(
+                        enable,
+                        true,
+                        host_ip,
+                        host_port,
+                        net_interface,
+                        r.guest_ip,
+                        guest_port,
+                    )?
+                }
+
+                guest_port += 1;
+            }
+        }
+    }
+
+    Ok(())
+}
+
+fn check_cmd(s: ExitStatus) -> anyhow::Result<()> {
+    if !s.success() {
+        log::error!("Failed to update firewall rules!");
+        return Err(NatConfModeError::UpdateFirewall.into());
+    }
+    Ok(())
+}
+
+fn toggle_port_forwarding(
+    enable: bool,
+    is_udp: bool,
+    host_ip: IpAddr,
+    host_port: u16,
+    net_interface: &str,
+    guest_ip: IpAddr,
+    guest_port: u16,
+) -> anyhow::Result<()> {
+    if host_ip.is_ipv4() != guest_ip.is_ipv4() {
+        log::trace!("Skipping invalid combination {host_ip} -> {guest_ip}");
+        return Ok(());
+    }
+
+    let program = match host_ip.is_ipv4() {
+        true => "/sbin/iptables",
+        false => "/sbin/ip6tables",
+    };
+
+    let protocol = match is_udp {
+        true => "udp",
+        false => "tcp",
+    };
+
+    log::info!("Forward (add={enable}) incoming {protocol} connections for {host_ip}:{host_port} to {guest_ip}:{guest_port} int {net_interface}");
+
+    // Rule 1
+    let cmd = Command::new(program)
+        .arg(match enable {
+            true => "-I",
+            false => "-D",
+        })
+        .arg("FORWARD")
+        .arg("-o")
+        .arg(net_interface)
+        .arg("-p")
+        .arg(protocol)
+        .arg("-d")
+        .arg(guest_ip.to_string())
+        .arg("--dport")
+        .arg(guest_port.to_string())
+        .arg("-j")
+        .arg("ACCEPT")
+        .status()?;
+    check_cmd(cmd)?;
+
+    // Rule 2
+    let cmd = Command::new(program)
+        .arg("-t")
+        .arg("nat")
+        .arg(match enable {
+            true => "-I",
+            false => "-D",
+        })
+        .arg("PREROUTING")
+        .arg("-p")
+        .arg(protocol)
+        .arg("-d")
+        .arg(host_ip.to_string())
+        .arg("--dport")
+        .arg(host_port.to_string())
+        .arg("-j")
+        .arg("DNAT")
+        .arg("--to")
+        .arg(format!("{guest_ip}:{guest_port}"))
+        .status()?;
+    check_cmd(cmd)?;
+
+    Ok(())
+}

virtweb_backend/src/nat/nat_definition.rs

@@ -0,0 +1,142 @@
+use crate::constants;
+use crate::utils::net_utils;
+use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+
+#[derive(thiserror::Error, Debug)]
+enum NatDefError {
+    #[error("Invalid nat definition: {0}")]
+    InvalidNatDef(&'static str),
+}
+
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+#[serde(tag = "type", rename_all = "lowercase")]
+pub enum NatSourceIP<IPv> {
+    Interface { name: String },
+    Ip { ip: IPv },
+}
+
+#[derive(Debug, Copy, Clone, serde::Serialize, serde::Deserialize)]
+pub enum NatProtocol {
+    TCP,
+    UDP,
+    Both,
+}
+
+impl NatProtocol {
+    pub fn has_tcp(&self) -> bool {
+        !matches!(&self, NatProtocol::UDP)
+    }
+
+    pub fn has_udp(&self) -> bool {
+        !matches!(&self, NatProtocol::TCP)
+    }
+}
+
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+#[serde(tag = "type", rename_all = "lowercase")]
+pub enum NatHostPort {
+    Single { port: u16 },
+    Range { start: u16, end: u16 },
+}
+
+impl NatHostPort {
+    pub fn as_seq(&self) -> Vec<u16> {
+        match self {
+            NatHostPort::Single { port } => vec![*port],
+            NatHostPort::Range { start, end } => (*start..(*end + 1)).collect(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
+pub struct Nat<IPv> {
+    pub protocol: NatProtocol,
+    pub host_ip: NatSourceIP<IPv>,
+    pub host_port: NatHostPort,
+    pub guest_ip: IPv,
+    pub guest_port: u16,
+    pub comment: Option<String>,
+}
+
+impl<IPv> Nat<IPv> {
+    pub fn check(&self) -> anyhow::Result<()> {
+        if let NatSourceIP::Interface { name } = &self.host_ip {
+            if !net_utils::is_net_interface_name_valid(name) {
+                return Err(NatDefError::InvalidNatDef("Invalid nat interface name!").into());
+            }
+        }
+
+        if let NatHostPort::Range { start, end } = &self.host_port {
+            if *start == 0 {
+                return Err(NatDefError::InvalidNatDef("Invalid start range!").into());
+            }
+
+            if start > end {
+                return Err(NatDefError::InvalidNatDef("Invalid port range!").into());
+            }
+
+            if u16::MAX - (end - start) < self.guest_port {
+                return Err(NatDefError::InvalidNatDef("Guest port is too high!").into());
+            }
+        }
+
+        if self.guest_port == 0 {
+            return Err(NatDefError::InvalidNatDef("Invalid guest port!").into());
+        }
+
+        if let Some(comment) = &self.comment {
+            if comment.len() > constants::NET_NAT_COMMENT_MAX_SIZE {
+                return Err(NatDefError::InvalidNatDef("Comment is too large!").into());
+            }
+        }
+
+        Ok(())
+    }
+}
+
+impl Nat<Ipv4Addr> {
+    pub fn generalize(&self) -> Nat<IpAddr> {
+        Nat {
+            protocol: self.protocol,
+            host_ip: match &self.host_ip {
+                NatSourceIP::Ip { ip } => NatSourceIP::Ip {
+                    ip: IpAddr::V4(*ip),
+                },
+                NatSourceIP::Interface { name } => NatSourceIP::Interface {
+                    name: name.to_string(),
+                },
+            },
+            host_port: self.host_port.clone(),
+            guest_ip: IpAddr::V4(self.guest_ip),
+            guest_port: self.guest_port,
+            comment: self.comment.clone(),
+        }
+    }
+}
+
+impl Nat<Ipv6Addr> {
+    pub fn generalize(&self) -> Nat<IpAddr> {
+        Nat {
+            protocol: self.protocol,
+            host_ip: match &self.host_ip {
+                NatSourceIP::Ip { ip } => NatSourceIP::Ip {
+                    ip: IpAddr::V6(*ip),
+                },
+                NatSourceIP::Interface { name } => NatSourceIP::Interface {
+                    name: name.to_string(),
+                },
+            },
+            host_port: self.host_port.clone(),
+            guest_ip: IpAddr::V6(self.guest_ip),
+            guest_port: self.guest_port,
+            comment: self.comment.clone(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, serde::Serialize, serde::Deserialize, Default)]
+pub struct NetNat {
+    pub interface: String,
+    pub ipv4: Option<Vec<Nat<Ipv4Addr>>>,
+    pub ipv6: Option<Vec<Nat<Ipv6Addr>>>,
+}

virtweb_backend/src/nat/nat_hook.rs

@@ -0,0 +1,29 @@
+use crate::app_config::AppConfig;
+use crate::constants;
+use std::path::Path;
+
+/// Check out whether NAT hook has been installed or not
+pub fn is_installed() -> anyhow::Result<bool> {
+    let hook_file = Path::new(constants::NAT_HOOK_PATH);
+
+    if !hook_file.exists() {
+        return Ok(false);
+    }
+
+    let exe = std::env::current_exe()?;
+    let hook_content = std::fs::read_to_string(hook_file)?;
+
+    Ok(hook_content.contains(exe.to_string_lossy().as_ref()))
+}
+
+/// Get nat hook expected content
+pub fn hook_content() -> anyhow::Result<String> {
+    let exe = std::env::current_exe()?;
+
+    Ok(format!(
+        "#!/bin/bash\n\
+    NAT_MODE=1 {} --storage {} --network-name \"$1\" --operation \"$2\" --sub-operation \"$3\"",
+        exe.to_string_lossy(),
+        AppConfig::get().storage
+    ))
+}

virtweb_backend/src/nat/nat_lib.rs

@@ -0,0 +1,61 @@
+use crate::app_config::AppConfig;
+use crate::libvirt_rest_structures::net::{NetworkInfo, NetworkName};
+use crate::nat::nat_definition::NetNat;
+
+#[derive(thiserror::Error, Debug)]
+enum NatLibError {
+    #[error("Could not save nat definition, because network bridge name was not specified!")]
+    MissingNetworkBridgeName,
+}
+
+/// Save nat definition
+pub fn save_nat_def(net: &NetworkInfo) -> anyhow::Result<()> {
+    let nat = match net.has_nat_def() {
+        true => NetNat {
+            interface: net
+                .bridge_name
+                .as_ref()
+                .ok_or(NatLibError::MissingNetworkBridgeName)?
+                .to_string(),
+            ipv4: net
+                .ip_v4
+                .as_ref()
+                .map(|i| i.nat.clone())
+                .unwrap_or_default(),
+            ipv6: net
+                .ip_v6
+                .as_ref()
+                .map(|i| i.nat.clone())
+                .unwrap_or_default(),
+        },
+        false => NetNat::default(),
+    };
+
+    let json = serde_json::to_string(&nat)?;
+
+    std::fs::write(AppConfig::get().net_nat_path(&net.name), json)?;
+
+    Ok(())
+}
+
+/// Remove nat definition, if existing
+pub fn remove_nat_def(name: &NetworkName) -> anyhow::Result<()> {
+    let nat_file = AppConfig::get().net_nat_path(name);
+    if nat_file.exists() {
+        std::fs::remove_file(nat_file)?;
+    }
+
+    Ok(())
+}
+
+/// Load nat definition, if available
+pub fn load_nat_def(name: &NetworkName) -> anyhow::Result<NetNat> {
+    let nat_file = AppConfig::get().net_nat_path(name);
+    if !nat_file.exists() {
+        return Ok(NetNat::default());
+    }
+
+    let file = std::fs::read_to_string(nat_file)?;
+
+    Ok(serde_json::from_str(&file)?)
+}

virtweb_backend/src/utils/net_utils.rs

@@ -1,5 +1,8 @@
+use nix::sys::socket::{AddressFamily, SockaddrLike};
+use std::collections::HashMap;
 use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
 use std::str::FromStr;
+use sysinfo::Networks;
 
 pub fn extract_ipv4(ip: IpAddr) -> Ipv4Addr {
     match ip {
@@ -32,7 +35,7 @@ pub fn is_ipv4_mask_valid(mask: u8) -> bool {
 }
 
 pub fn is_ipv6_mask_valid(mask: u8) -> bool {
-    mask <= 64
+    mask <= 128
 }
 
 pub fn is_mask_valid(ipv: usize, mask: u8) -> bool {
@@ -47,10 +50,97 @@ pub fn is_mac_address_valid<D: AsRef<str>>(mac: D) -> bool {
     lazy_regex::regex!("^([a-fA-F0-9]{2}[:-]){5}[a-fA-F0-9]{2}$").is_match(mac.as_ref())
 }
 
+pub fn is_net_interface_name_valid<D: AsRef<str>>(int: D) -> bool {
+    lazy_regex::regex!("^[a-zA-Z0-9]+$").is_match(int.as_ref())
+}
+
+/// Get the list of available network interfaces
+pub fn net_list() -> Vec<String> {
+    let mut networks = Networks::new();
+    networks.refresh_list();
+
+    networks
+        .list()
+        .iter()
+        .map(|n| n.0.to_string())
+        .collect::<Vec<_>>()
+}
+
+/// Get the list of available network interfaces associated with their IP address
+pub fn net_list_and_ips() -> anyhow::Result<HashMap<String, Vec<IpAddr>>> {
+    let addrs = nix::ifaddrs::getifaddrs().unwrap();
+
+    let mut res = HashMap::new();
+
+    for ifaddr in addrs {
+        let address = match ifaddr.address {
+            Some(address) => address,
+            None => {
+                log::debug!(
+                    "Interface {} has an unsupported address family",
+                    ifaddr.interface_name
+                );
+                continue;
+            }
+        };
+
+        let addr_str = match address.family() {
+            Some(AddressFamily::Inet) => {
+                let address = address.to_string();
+                address
+                    .split_once(':')
+                    .map(|a| a.0)
+                    .unwrap_or(&address)
+                    .to_string()
+            }
+            Some(AddressFamily::Inet6) => {
+                let address = address.to_string();
+                let address = address
+                    .split_once(']')
+                    .map(|a| a.0)
+                    .unwrap_or(&address)
+                    .to_string();
+
+                let address = address
+                    .split_once('%')
+                    .map(|a| a.0)
+                    .unwrap_or(&address)
+                    .to_string();
+
+                address.strip_prefix('[').unwrap_or(&address).to_string()
+            }
+            _ => {
+                log::debug!(
+                    "Interface {} has an unsupported address family {:?}",
+                    ifaddr.interface_name,
+                    address.family()
+                );
+                continue;
+            }
+        };
+
+        log::debug!(
+            "Process ip {addr_str} for interface {}",
+            ifaddr.interface_name
+        );
+
+        let ip = IpAddr::from_str(&addr_str)?;
+
+        if !res.contains_key(&ifaddr.interface_name) {
+            res.insert(ifaddr.interface_name.to_string(), Vec::with_capacity(1));
+        }
+
+        res.get_mut(&ifaddr.interface_name).unwrap().push(ip);
+    }
+
+    Ok(res)
+}
+
 #[cfg(test)]
 mod tests {
     use crate::utils::net_utils::{
         is_ipv4_address_valid, is_ipv6_address_valid, is_mac_address_valid, is_mask_valid,
+        is_net_interface_name_valid,
     };
 
     #[test]
@@ -79,6 +169,7 @@ mod tests {
         assert!(is_ipv6_address_valid("fe80::"));
         assert!(is_ipv6_address_valid("fe80:dd::"));
         assert!(is_ipv6_address_valid("00:00:00:00:00::"));
+        assert!(is_ipv6_address_valid("0:0:0:0:0:0:0:0"));
 
         assert!(!is_ipv6_address_valid("tata"));
         assert!(!is_ipv6_address_valid("2.56.58.156"));
@@ -93,6 +184,17 @@ mod tests {
         assert!(is_mask_valid(6, 34));
 
         assert!(!is_mask_valid(4, 34));
-        assert!(!is_mask_valid(6, 69));
+        assert!(is_mask_valid(6, 69));
+        assert!(is_mask_valid(6, 128));
+        assert!(!is_mask_valid(6, 129));
+    }
+
+    #[test]
+    fn test_is_net_interface_name_valid() {
+        assert!(is_net_interface_name_valid("eth0"));
+        assert!(is_net_interface_name_valid("enp0s25"));
+
+        assert!(!is_net_interface_name_valid("enp0s25 "));
+        assert!(!is_net_interface_name_valid("@enp0s25 "));
     }
 }

virtweb_docs/SETUP_PROD.md

@@ -102,7 +102,8 @@ sudo systemctl start virtweb
 
 You should now be able to create VMs!
 
-### Manual port forwarding without a LibVirt HOOK
+
+## Configure port forwarding
 * Allow ip forwarding in the kernel: edit `/etc/sysctl.conf` and uncomment the following line:
 
 ```
@@ -115,85 +116,34 @@ net.ipv4.ip_forward=1
 sudo sysctl -p /etc/sysctl.conf
 ```
 
-* Create the following IPTables rules:
+* Configure apparmore service. Create or update a file named `/etc/apparmor.d/local/usr.sbin.libvirtd` with the following content:
 
 ```
-UP_DEV=$(ip a | grep "192.168.1." -B 2 | head -n 1 | cut -d ':' -f 2 |
- tr -d ' ')
-LOCAL_DEV=$(ip a | grep "192.168.25." -B 2 | head -n 1 | cut -d ':' -f 2 | tr -d ' ')
-echo "$UP_DEV -> $LOCAL_DEV"
-
-GUEST_IP=192.168.25.189
-HOST_PORT=8085
-GUEST_PORT=8085
-
-# connections from outside
-sudo iptables -I FORWARD -o $LOCAL_DEV -d  $GUEST_IP -j ACCEPT
-sudo iptables -t nat -I PREROUTING -p tcp --dport $HOST_PORT -j DNAT --to $GUEST_IP:$GUEST_PORT
+/usr/local/bin/virtweb_backend ux,
 ```
 
-* Theses rules can be persisted using `iptables-save` then, or using a libvirt hook.
+* Update Apparmor configuration:
 
-
-### Manual port forwarding with a LibVirt HOOK
-* Allow ip forwarding in the kernel: edit `/etc/sysctl.conf` and uncomment the following line:
-
-```
-net.ipv4.ip_forward=1
+```bash
+sudo apparmor_parser -r /etc/apparmor.d/usr.sbin.libvirtd
 ```
 
-* To reload `sysctl` without reboot:
-
-```
-sudo sysctl -p /etc/sysctl.conf
-```
-
-* Get the following information, using the web ui or `virsh`:
-	* The name of the target guest
-	* The IP and port of the guest who will receive the connection
-	* The port of the host that will be forwarded to the guest
-
-* Stop the guest if its running, either using `virsh` or from the web ui
-
-* Create or append the following content to the file `/etc/libvirt/hooks/qemu`:
+* Create VirtWeb hook. Set the following content inside `/etc/libvirt/hooks/network`:
 
 ```bash
 #!/bin/bash
-
-# IMPORTANT: Change the "VM NAME" string to match your actual VM Name.
-# In order to create rules to other VMs, just duplicate the below block and configure
-# it accordingly.
-if [ "${1}" = "VM NAME" ]; then
-
- # Update the following variables to fit your setup
- GUEST_IP=
- GUEST_PORT=
- HOST_PORT=
-
- if [ "${2}" = "stopped" ] || [ "${2}" = "reconnect" ]; then
-  /sbin/iptables -D FORWARD -o virbr0 -p tcp -d $GUEST_IP --dport $GUEST_PORT -j ACCEPT
-  /sbin/iptables -t nat -D PREROUTING -p tcp --dport $HOST_PORT -j DNAT --to $GUEST_IP:$GUEST_PORT
- fi
- if [ "${2}" = "start" ] || [ "${2}" = "reconnect" ]; then
-  /sbin/iptables -I FORWARD -o virbr0 -p tcp -d $GUEST_IP --dport $GUEST_PORT -j ACCEPT
-  /sbin/iptables -t nat -I PREROUTING -p tcp --dport $HOST_PORT -j DNAT --to $GUEST_IP:$GUEST_PORT
- fi
-fi
+NAT_MODE=1 /usr/local/bin/virtweb_backend --storage /home/virtweb/storage --network-name "$1" --operation "$2" --sub-operation "$3"
 ```
 
-* Make the hook executable:
+* Make the script executable:
 
 ```bash
-sudo chmod +x /etc/libvirt/hooks/qemu
+sudo chmod +x /etc/libvirt/hooks/network
 ```
 
-* Restart the `libvirtd` service:
+* Restart `libvirtd` and `VirtWeb`:
 
 ```bash
-sudo systemctl restart libvirtd.service
-```
-
-* Start the guest
-
-
-> Note: this guide is based on https://wiki.libvirt.org/Networking.html
+sudo systemctl restart libvirtd
+sudo systemctl restart virtweb
+```

virtweb_frontend/src/api/NetworksApi.ts

@@ -13,10 +13,28 @@ export interface DHCPConfig {
   hosts: DHCPHost[];
 }
 
+export type NatSource =
+  | { type: "interface"; name: string }
+  | { type: "ip"; ip: string };
+
+export type NatHostPort =
+  | { type: "single"; port: number }
+  | { type: "range"; start: number; end: number };
+
+export interface NatEntry {
+  protocol: "TCP" | "UDP" | "Both";
+  host_ip: NatSource;
+  host_port: NatHostPort;
+  guest_ip: string;
+  guest_port: number;
+  comment?: string;
+}
+
 export interface IpConfig {
   bridge_address: string;
   prefix: number;
   dhcp?: DHCPConfig;
+  nat?: NatEntry[];
 }
 
 export interface NetworkInfo {

virtweb_frontend/src/api/ServerApi.ts

@@ -21,6 +21,7 @@ export interface ServerConstraints {
   disk_size: LenConstraint;
   net_name_size: LenConstraint;
   net_title_size: LenConstraint;
+  net_nat_comment_size: LenConstraint;
   dhcp_reservation_host_name: LenConstraint;
   nwfilter_name_size: LenConstraint;
   nwfilter_comment_size: LenConstraint;
@@ -38,6 +39,9 @@ let config: ServerConfig | null = null;
 export interface ServerSystemInfo {
   hypervisor: HypervisorInfo;
   system: SystemInfo;
+  components: SysComponent;
+  disks: DiskInfo[];
+  networks: NetworkInfo[];
 }
 
 interface HypervisorInfo {
@@ -76,10 +80,6 @@ interface SystemInfo {
   total_swap: number;
   free_swap: number;
   used_swap: number;
-  components: SysComponent;
-  users: [];
-  disks: DiskInfo[];
-  networks: NetworkInfo[];
   uptime: number;
   boot_time: number;
   load_average: SysLoadAverage;
@@ -147,6 +147,12 @@ interface SysLoadAverage {
   fifteen: number;
 }
 
+export interface NetworkHookStatus {
+  installed: boolean;
+  content: string;
+  path: string;
+}
+
 export class ServerApi {
   /**
    * Get server configuration
@@ -180,6 +186,18 @@ export class ServerApi {
     ).data;
   }
 
+  /**
+   * Get network hook status
+   */
+  static async NetworkHookStatus(): Promise<NetworkHookStatus> {
+    return (
+      await APIClient.exec({
+        method: "GET",
+        uri: "/server/network_hook_status",
+      })
+    ).data;
+  }
+
   /**
    * Get host supported vCPUs configurations
    */

virtweb_frontend/src/routes/NetworksListRoute.tsx

@@ -19,6 +19,7 @@ import { RouterLink } from "../widgets/RouterLink";
 import { VirtWebRouteContainer } from "../widgets/VirtWebRouteContainer";
 import { NetworkStatusWidget } from "../widgets/net/NetworkStatusWidget";
 import { useNavigate } from "react-router-dom";
+import { NetworkHookStatusWidget } from "../widgets/net/NetworkHookStatusWidget";
 
 export function NetworksListRoute(): React.ReactElement {
   const [list, setList] = React.useState<NetworkInfo[] | undefined>();
@@ -54,6 +55,8 @@ function NetworksListRouteInner(p: {
         </RouterLink>
       }
     >
+      <NetworkHookStatusWidget hiddenIfInstalled />
+
       <TableContainer component={Paper}>
         <Table>
           <TableHead>

virtweb_frontend/src/routes/SysInfoRoute.tsx

@@ -51,7 +51,7 @@ export function SysInfoRoute(): React.ReactElement {
 export function SysInfoRouteInner(p: {
   info: ServerSystemInfo;
 }): React.ReactElement {
-  const sumDiskUsage = p.info.system.disks.reduce(
+  const sumDiskUsage = p.info.disks.reduce(
     (prev, disk) => {
       return {
         used: prev.used + disk.total_space - disk.available_space,
@@ -227,8 +227,8 @@ export function SysInfoRouteInner(p: {
         ]}
       />
 
-      <DiskDetailsTable disks={p.info.system.disks} />
-      <NetworksDetailsTable networks={p.info.system.networks} />
+      <DiskDetailsTable disks={p.info.disks} />
+      <NetworksDetailsTable networks={p.info.networks} />
     </VirtWebRouteContainer>
   );
 }

virtweb_frontend/src/widgets/CopyToClipboard.tsx

@@ -0,0 +1,30 @@
+import { ButtonBase } from "@mui/material";
+import { PropsWithChildren } from "react";
+import { useSnackbar } from "../hooks/providers/SnackbarProvider";
+
+export function CopyToClipboard(
+  p: PropsWithChildren<{ content: string }>
+): React.ReactElement {
+  const snackbar = useSnackbar();
+
+  const copy = () => {
+    navigator.clipboard.writeText(p.content);
+    snackbar(`${p.content} copied to clipboard.`);
+  };
+
+  return (
+    <ButtonBase
+      onClick={copy}
+      style={{
+        display: "inline-block",
+        alignItems: "unset",
+        textAlign: "unset",
+        position: "relative",
+        padding: "0px",
+      }}
+      disableRipple
+    >
+      {p.children}
+    </ButtonBase>
+  );
+}

virtweb_frontend/src/widgets/forms/EditSection.tsx

@@ -2,10 +2,14 @@ import { Grid, Paper, Typography } from "@mui/material";
 import React, { PropsWithChildren } from "react";
 
 export function EditSection(
-  p: { title?: string; actions?: React.ReactElement } & PropsWithChildren
+  p: {
+    title?: string;
+    actions?: React.ReactElement;
+    fullWidth?: boolean;
+  } & PropsWithChildren
 ): React.ReactElement {
   return (
-    <Grid item sm={12} md={6}>
+    <Grid item sm={12} md={p.fullWidth ? 12 : 6}>
       <Paper style={{ margin: "10px", padding: "10px" }}>
         {(p.title || p.actions) && (
           <span

virtweb_frontend/src/widgets/forms/IPInput.tsx

@@ -128,6 +128,6 @@ function sanitizeMask(version: 4 | 6, mask?: string): number | undefined {
   if (version === 4) {
     return value < 0 || value > 32 ? 32 : value;
   } else {
-    return value < 0 || value > 64 ? 64 : value;
+    return value < 0 || value > 128 ? 128 : value;
   }
 }

virtweb_frontend/src/widgets/forms/NetDHCPHostReservations.tsx

@@ -4,12 +4,14 @@ import DeleteIcon from "@mui/icons-material/Delete";
 import {
   Avatar,
   Button,
+  Grid,
   IconButton,
   ListItem,
   ListItemAvatar,
   ListItemText,
   Paper,
   Tooltip,
+  Typography,
 } from "@mui/material";
 import { DHCPConfig, DHCPHost } from "../../api/NetworksApi";
 import { ServerApi } from "../../api/ServerApi";
@@ -35,21 +37,29 @@ export function NetDHCPHostReservations(p: {
 
   return (
     <>
-      {p.dhcp.hosts.map((h, num) => (
-        <HostReservationWidget
-          key={num}
-          {...p}
-          onChange={() => {
-            p.onChange?.(p.dhcp);
-          }}
-          host={h}
-          onRemove={() => {
-            p.dhcp.hosts.splice(num, 1);
-            p.onChange?.(p.dhcp);
-          }}
-        />
-      ))}
-
+      <Grid container>
+        {p.dhcp.hosts.map((h, num) => (
+          <Grid key={num} sm={12} md={6} item style={{ padding: "10px" }}>
+            <HostReservationWidget
+              key={num}
+              {...p}
+              onChange={() => {
+                p.onChange?.(p.dhcp);
+              }}
+              host={h}
+              onRemove={() => {
+                p.dhcp.hosts.splice(num, 1);
+                p.onChange?.(p.dhcp);
+              }}
+            />
+          </Grid>
+        ))}
+      </Grid>
+      {p.dhcp.hosts.length === 0 && (
+        <Typography style={{ textAlign: "center" }}>
+          You have not set any DHCP host reservations.
+        </Typography>
+      )}
       {p.editable && (
         <Button onClick={addHost}>Add new host reservation</Button>
       )}

virtweb_frontend/src/widgets/forms/NetNatConfiguration.tsx

@@ -0,0 +1,311 @@
+import DeleteIcon from "@mui/icons-material/Delete";
+import {
+  Alert,
+  Button,
+  Card,
+  CardActions,
+  CardContent,
+  Grid,
+  IconButton,
+  Tooltip,
+  Typography,
+} from "@mui/material";
+import React, { PropsWithChildren } from "react";
+import { NatEntry } from "../../api/NetworksApi";
+import { ServerApi } from "../../api/ServerApi";
+import { useConfirm } from "../../hooks/providers/ConfirmDialogProvider";
+import { IPInput } from "./IPInput";
+import { PortInput } from "./PortInput";
+import { RadioGroupInput } from "./RadioGroupInput";
+import { SelectInput } from "./SelectInput";
+import { TextInput } from "./TextInput";
+
+export function NetNatConfiguration(p: {
+  editable: boolean;
+  nat: NatEntry[];
+  nicsList: string[];
+  onChange?: (nat: NatEntry[]) => void;
+  version: 4 | 6;
+}): React.ReactElement {
+  const confirm = useConfirm();
+
+  const addEntry = () => {
+    p.nat.push({
+      host_ip: {
+        type: "ip",
+        ip: p.version === 4 ? "10.0.0.1" : "fd00::",
+      },
+      host_port: { type: "single", port: 80 },
+      guest_ip: p.version === 4 ? "10.0.0.100" : "fd00::",
+      guest_port: 10,
+      protocol: "TCP",
+    });
+    p.onChange?.(p.nat);
+  };
+
+  const onDelete = async (idx: number) => {
+    if (!(await confirm("Do you really want to delete this entry?"))) return;
+
+    p.nat.splice(idx, 1);
+    p.onChange?.(p.nat);
+  };
+
+  return (
+    <>
+      {p.nat.map((e, num) => (
+        <NatEntryForm
+          key={num}
+          {...p}
+          entry={e}
+          onChange={() => p.onChange?.(p.nat)}
+          onDelete={() => onDelete(num)}
+        />
+      ))}
+
+      {p.nat.length === 0 && (
+        <Typography style={{ textAlign: "center" }}>
+          You have not set any NAT entry yet.
+        </Typography>
+      )}
+
+      {p.editable && <Button onClick={addEntry}>Add a new entry</Button>}
+    </>
+  );
+}
+
+function NatEntryForm(p: {
+  editable: boolean;
+  version: 4 | 6;
+  entry: NatEntry;
+  onChange?: () => void;
+  onDelete: () => void;
+  nicsList: string[];
+}): React.ReactElement {
+  const guestPortEnd =
+    p.entry.host_port.type === "range"
+      ? p.entry.host_port.end - p.entry.host_port.start + p.entry.guest_port
+      : undefined;
+
+  return (
+    <Card style={{ margin: "30px" }} elevation={3}>
+      <CardContent>
+        <Grid container>
+          <NATEntryProp>
+            <SelectInput
+              {...p}
+              label="Protocol"
+              options={[
+                { value: "TCP" },
+                { value: "UDP" },
+                { label: "TCP & UDP", value: "Both" },
+              ]}
+              value={p.entry.protocol}
+              onValueChange={(v) => {
+                p.entry.protocol = v as any;
+                p.onChange?.();
+              }}
+            />
+          </NATEntryProp>
+          <NATEntryProp>
+            <TextInput
+              {...p}
+              label="Comment"
+              value={p.entry.comment}
+              onValueChange={(v) => {
+                p.entry.comment = v;
+                p.onChange?.();
+              }}
+              size={ServerApi.Config.constraints.net_nat_comment_size}
+            />
+          </NATEntryProp>
+
+          {/* Host conf */}
+          <NATEntryProp label="Host configuration">
+            <SelectInput
+              {...p}
+              label="Host IP address specification"
+              options={[
+                {
+                  label: "Specific IP",
+                  value: "ip",
+                  description: "Use a pre-defined IP address",
+                },
+                {
+                  label: "Network interface",
+                  value: "interface",
+                  description:
+                    "Use active IP addresses on the selected network interface during network startup to determine host adddress",
+                },
+              ]}
+              value={p.entry.host_ip.type}
+              onValueChange={(v) => {
+                p.entry.host_ip.type = v as any;
+                p.onChange?.();
+              }}
+            />
+
+            {p.entry.host_ip.type === "ip" && (
+              <IPInput
+                {...p}
+                label="Host IP address"
+                value={p.entry.host_ip.ip}
+                onValueChange={(v) => {
+                  if (p.entry.host_ip.type === "ip") p.entry.host_ip.ip = v!;
+                  p.onChange?.();
+                }}
+              />
+            )}
+
+            {p.entry.host_ip.type === "interface" && (
+              <>
+                {p.editable && (
+                  <Alert severity="warning" style={{ margin: "10px 0px" }}>
+                    Warning! All IP addresses may not be inferred on reboot due
+                    to the fact that the network hook might be executed before
+                    the network interfaces are fully configured. This might lead
+                    to incomplete ports exposition!
+                  </Alert>
+                )}
+                <SelectInput
+                  {...p}
+                  label="Network interface"
+                  value={p.entry.host_ip.name}
+                  options={p.nicsList.map((n) => {
+                    return {
+                      value: n,
+                    };
+                  })}
+                  onValueChange={(v) => {
+                    if (p.entry.host_ip.type === "interface")
+                      p.entry.host_ip.name = v!;
+                    p.onChange?.();
+                  }}
+                />
+              </>
+            )}
+          </NATEntryProp>
+
+          <NATEntryProp label="Target guest configuration">
+            <IPInput
+              {...p}
+              label="Guest IP"
+              value={p.entry.guest_ip}
+              onValueChange={(v) => {
+                p.entry.guest_ip = v!;
+                p.onChange?.();
+              }}
+            />
+          </NATEntryProp>
+
+          <NATEntryProp>
+            <RadioGroupInput
+              {...p}
+              options={[
+                { label: "Single port", value: "single" },
+                { label: "Range of ports", value: "range" },
+              ]}
+              value={p.entry.host_port.type}
+              onValueChange={(v) => {
+                p.entry.host_port.type = v as any;
+                p.onChange?.();
+              }}
+            />
+
+            {p.entry.host_port.type === "single" && (
+              <PortInput
+                {...p}
+                label="Host port"
+                value={p.entry.host_port.port}
+                onChange={(v) => {
+                  if (p.entry.host_port.type === "single")
+                    p.entry.host_port.port = v!;
+                  p.onChange?.();
+                }}
+              />
+            )}
+
+            {p.entry.host_port.type === "range" && (
+              <div style={{ display: "flex" }}>
+                <PortInput
+                  {...p}
+                  label="Host port start"
+                  value={p.entry.host_port.start}
+                  onChange={(v) => {
+                    if (p.entry.host_port.type === "range")
+                      p.entry.host_port.start = v!;
+                    p.onChange?.();
+                  }}
+                />
+                <PortSpacer />
+                <PortInput
+                  {...p}
+                  label="Host port end"
+                  value={p.entry.host_port.end}
+                  onChange={(v) => {
+                    if (p.entry.host_port.type === "range")
+                      p.entry.host_port.end = v!;
+                    p.onChange?.();
+                  }}
+                />
+              </div>
+            )}
+          </NATEntryProp>
+
+          <NATEntryProp>
+            <div style={{ display: "flex", height: "100%", alignItems: "end" }}>
+              <PortInput
+                {...p}
+                label={`Guest port ${guestPortEnd ? "start" : ""}`}
+                value={p.entry.guest_port}
+                onChange={(v) => {
+                  p.entry.guest_port = v!;
+                  p.onChange?.();
+                }}
+              />
+              {guestPortEnd && <PortSpacer />}
+              {guestPortEnd && (
+                <PortInput
+                  editable={false}
+                  label={`Guest port end`}
+                  value={guestPortEnd}
+                  onChange={(v) => {
+                    p.entry.guest_port = v!;
+                    p.onChange?.();
+                  }}
+                />
+              )}
+            </div>
+          </NATEntryProp>
+        </Grid>
+      </CardContent>
+      <CardActions>
+        {p.editable && (
+          <Tooltip title="Remove the entry">
+            <IconButton color="error" onClick={p.onDelete}>
+              <DeleteIcon />
+            </IconButton>
+          </Tooltip>
+        )}
+      </CardActions>
+    </Card>
+  );
+}
+
+function NATEntryProp(
+  p: PropsWithChildren<{ label?: string }>
+): React.ReactElement {
+  return (
+    <Grid item sm={12} md={6} style={{ padding: "20px" }}>
+      {p.label && (
+        <Typography variant="h6" style={{ marginBottom: "10px" }}>
+          {p.label}
+        </Typography>
+      )}
+      {p.children}
+    </Grid>
+  );
+}
+
+function PortSpacer(): React.ReactElement {
+  return <span style={{ width: "20px" }}></span>;
+}

virtweb_frontend/src/widgets/forms/PortInput.tsx

@@ -14,6 +14,7 @@ export function PortInput(p: {
       onValueChange={(v) => {
         p.onChange?.(sanitizePort(v));
       }}
+      checkValue={(v) => Number(v) <= 65535}
     />
   );
 }

virtweb_frontend/src/widgets/forms/RadioGroupInput.tsx

@@ -0,0 +1,40 @@
+import {
+  RadioGroup,
+  FormControlLabel,
+  Radio,
+  FormControl,
+  FormLabel,
+} from "@mui/material";
+
+interface RadioGroupOption {
+  label: string;
+  value: string;
+}
+
+export function RadioGroupInput(p: {
+  editable: boolean;
+  label?: string;
+  options: RadioGroupOption[];
+  value: string;
+  onValueChange: (v: string) => void;
+}): React.ReactElement {
+  return (
+    <FormControl>
+      {p.label && <FormLabel>{p.label}</FormLabel>}
+      <RadioGroup
+        row
+        value={p.value}
+        onChange={(_ev, v) => p.onValueChange?.(v)}
+      >
+        {p.options.map((o) => (
+          <FormControlLabel
+            disabled={!p.editable}
+            value={o.value}
+            control={<Radio />}
+            label={o.label}
+          />
+        ))}
+      </RadioGroup>
+    </FormControl>
+  );
+}

virtweb_frontend/src/widgets/forms/SelectInput.tsx

@@ -9,7 +9,7 @@ import { TextInput } from "./TextInput";
 
 export interface SelectOption {
   value?: string;
-  label: string;
+  label?: string;
   description?: string;
 }
 
@@ -23,9 +23,10 @@ export function SelectInput(p: {
   if (!p.editable && !p.value) return <></>;
 
   if (!p.editable) {
-    const value = p.options.find((o) => o.value === p.value)?.label;
+    const value = p.options.find((o) => o.value === p.value)?.label ?? p.value;
     return <TextInput label={p.label} editable={p.editable} value={value} />;
   }
+
   return (
     <FormControl fullWidth variant="standard" style={{ marginBottom: "15px" }}>
       <InputLabel>{p.label}</InputLabel>
@@ -41,7 +42,7 @@ export function SelectInput(p: {
             style={{ fontStyle: e.value === undefined ? "italic" : undefined }}
           >
             <div>
-              {e.label}
+              {e.label ?? e.value}
               {e.description && (
                 <Typography
                   component={"div"}

virtweb_frontend/src/widgets/forms/VMSelectIsoInput.tsx

@@ -68,15 +68,13 @@ export function VMSelectIsoInput(p: {
             p.onChange(p.attachedISOs);
           }
         }}
-        options={[
-          { label: "None", value: undefined },
-          ...p.isoList.map((i) => {
+        options={p.isoList.map((i) => {
             return {
               label: `${i.filename} ${filesize(i.size)}`,
               value: i.filename,
             };
-          }),
-        ]}
+          })
+        }
       />
     </>
   );

virtweb_frontend/src/widgets/net/NetworkDetails.tsx

@@ -8,13 +8,14 @@ import { useConfirm } from "../../hooks/providers/ConfirmDialogProvider";
 import { useSnackbar } from "../../hooks/providers/SnackbarProvider";
 import { AsyncWidget } from "../AsyncWidget";
 import { TabsWidget } from "../TabsWidget";
+import { XMLAsyncWidget } from "../XMLWidget";
 import { EditSection } from "../forms/EditSection";
 import { IPInput } from "../forms/IPInput";
+import { NetDHCPHostReservations } from "../forms/NetDHCPHostReservations";
+import { NetNatConfiguration } from "../forms/NetNatConfiguration";
 import { ResAutostartInput } from "../forms/ResAutostartInput";
 import { SelectInput } from "../forms/SelectInput";
 import { TextInput } from "../forms/TextInput";
-import { NetDHCPHostReservations } from "../forms/NetDHCPHostReservations";
-import { XMLAsyncWidget } from "../XMLWidget";
 
 interface DetailsProps {
   net: NetworkInfo;
@@ -223,7 +224,7 @@ function NetworkDetailsTabGeneral(p: DetailsInnerProps): React.ReactElement {
 function NetworkDetailsTabIPv4(p: DetailsInnerProps): React.ReactElement {
   return (
     <IPSection
-      editable={p.editable}
+      {...p}
       config={p.net.ip_v4}
       onChange={(c) => {
         p.net.ip_v4 = c;
@@ -237,7 +238,7 @@ function NetworkDetailsTabIPv4(p: DetailsInnerProps): React.ReactElement {
 function NetworkDetailsTabIPv6(p: DetailsInnerProps): React.ReactElement {
   return (
     <IPSection
-      editable={p.editable}
+      {...p}
       config={p.net.ip_v6}
       onChange={(c) => {
         p.net.ip_v6 = c;
@@ -253,6 +254,7 @@ function IPSection(p: {
   config?: IpConfig;
   onChange: (c: IpConfig | undefined) => void;
   version: 4 | 6;
+  nicsList: string[];
 }): React.ReactElement {
   const confirm = useConfirm();
 
@@ -260,7 +262,7 @@ function IPSection(p: {
     if (!!p.config) {
       if (
         !(await confirm(
-          `Do you really want to disable IPv${p.version} on this network?`
+          `Do you really want to disable IPv${p.version} on this network? Specific configuration will be deleted!`
         ))
       )
         return;
@@ -275,8 +277,8 @@ function IPSection(p: {
     });
   };
 
-  const toggleDHCP = (v: boolean) => {
-    if (v)
+  const toggleDHCP = async (v: boolean) => {
+    if (v) {
       p.config!.dhcp =
         p.version === 4
           ? {
@@ -285,7 +287,32 @@ function IPSection(p: {
               hosts: [],
             }
           : { start: "fd00::100", end: "fd00::f00", hosts: [] };
-    else p.config!.dhcp = undefined;
+    } else {
+      if (
+        !(await confirm(
+          `Do you really want to disable DHCPv${p.version} on this network? Specific configuration will be deleted!`
+        ))
+      )
+        return;
+      p.config!.dhcp = undefined;
+    }
+
+    p.onChange?.(p.config);
+  };
+
+  const toggleNAT = async (v: boolean) => {
+    if (v) {
+      p.config!.nat = [];
+    } else {
+      if (
+        (p.config?.nat?.length ?? 0 > 0) &&
+        !(await confirm(
+          `Do you really want to disable IPv${p.version} NAT port forwarding on this network? Specific configuration will be deleted!`
+        ))
+      )
+        return;
+      p.config!.nat = undefined;
+    }
 
     p.onChange?.(p.config);
   };
@@ -373,7 +400,7 @@ function IPSection(p: {
       )}
 
       {p.config?.dhcp && (p.editable || p.config.dhcp.hosts.length > 0) && (
-        <EditSection title="DHCP hosts reservations">
+        <EditSection title="DHCP hosts reservations" fullWidth>
           <NetDHCPHostReservations
             {...p}
             dhcp={p.config.dhcp}
@@ -384,6 +411,31 @@ function IPSection(p: {
           />
         </EditSection>
       )}
+
+      {p.config && (p.editable || p.config.nat) && (
+        <EditSection
+          title={`NAT v${p.version} ports redirection`}
+          fullWidth
+          actions={
+            <Checkbox
+              disabled={!p.editable}
+              checked={!!p.config.nat}
+              onChange={(_ev, val) => toggleNAT(val)}
+            />
+          }
+        >
+          {p.config.nat && (
+            <NetNatConfiguration
+              {...p}
+              nat={p.config.nat}
+              onChange={(n) => {
+                p.config!.nat = n;
+                p.onChange?.(p.config);
+              }}
+            />
+          )}
+        </EditSection>
+      )}
     </Grid>
   );
 }

virtweb_frontend/src/widgets/net/NetworkHookStatusWidget.tsx

@@ -0,0 +1,110 @@
+import { Alert } from "@mui/material";
+import React, { PropsWithChildren } from "react";
+import { NetworkHookStatus, ServerApi } from "../../api/ServerApi";
+import { AsyncWidget } from "../AsyncWidget";
+import { CopyToClipboard } from "../CopyToClipboard";
+
+export function NetworkHookStatusWidget(p: {
+  hiddenIfInstalled: boolean;
+}): React.ReactElement {
+  const [status, setStatus] = React.useState<NetworkHookStatus | undefined>();
+
+  const load = async () => {
+    setStatus(await ServerApi.NetworkHookStatus());
+  };
+
+  return (
+    <AsyncWidget
+      loadKey={1}
+      errMsg="Failed to get network status!"
+      ready={!!status}
+      load={load}
+      build={() => <NetworkHookStatusWidgetInner {...p} status={status!} />}
+    />
+  );
+}
+
+function NetworkHookStatusWidgetInner(p: {
+  status: NetworkHookStatus;
+  hiddenIfInstalled: boolean;
+}): React.ReactElement {
+  if (p.status.installed && p.hiddenIfInstalled) return <></>;
+  if (p.status.installed)
+    return (
+      <Alert
+        variant="outlined"
+        severity="success"
+        style={{ margin: "20px 0px" }}
+      >
+        The network hook has been installed on this system.
+      </Alert>
+    );
+
+  const makeExecutable = `chmod +x ${p.status.path}`;
+
+  return (
+    <Alert variant="outlined" severity="warning" style={{ margin: "20px 0px" }}>
+      The network hook has not been detected on this system. It must be
+      installed in order to expose ports from virtual machines through NAT on
+      the network.
+      <br />
+      <br />
+      In order to install it, please create a file named &nbsp;
+      <CopyToClipboard content={p.status.path}>
+        <InlineCode>{p.status.path}</InlineCode> &nbsp; with the following
+      </CopyToClipboard>
+      content:
+      <br />
+      <CopyToClipboard content={p.status.content}>
+        <CodeBlock>{p.status.content}</CodeBlock>
+      </CopyToClipboard>
+      <br />
+      Make sure that the created file is executable :
+      <br />
+      <CopyToClipboard content={makeExecutable}>
+        <CodeBlock>{makeExecutable}</CodeBlock>
+      </CopyToClipboard>
+      <br />
+      You will need then to restart both <InlineCode>
+        libvirtd
+      </InlineCode> and <InlineCode>VirtWeb</InlineCode>.
+    </Alert>
+  );
+}
+
+function InlineCode(p: PropsWithChildren): React.ReactElement {
+  return (
+    <code
+      style={{
+        display: "inline-block",
+        backgroundColor: "black",
+        color: "white",
+        wordBreak: "break-all",
+        wordWrap: "break-word",
+        whiteSpace: "pre-wrap",
+        padding: "0px 7px",
+        borderRadius: "5px",
+      }}
+    >
+      {p.children}
+    </code>
+  );
+}
+
+function CodeBlock(p: PropsWithChildren): React.ReactElement {
+  return (
+    <pre
+      style={{
+        backgroundColor: "black",
+        color: "white",
+        wordBreak: "break-all",
+        wordWrap: "break-word",
+        whiteSpace: "pre-wrap",
+        padding: "10px",
+        borderRadius: "5px",
+      }}
+    >
+      {p.children}
+    </pre>
+  );
+}