Add some basic cli

Cargo.lock

@@ -26,6 +26,55 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "anstream"
+version = "0.6.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64e15c1ab1f89faffbf04a634d5e1962e9074f2741eef6d97f3c4e322426d526"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bec1de6f59aedf83baf9ff929c98f2ad654b97c9510f4e70cf6f661d49fd5b1"
+
+[[package]]
+name = "anstyle-parse"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb47de1e80c2b463c735db5b217a0ddc39d612e7ac9e2e96a5aed1f57616c1cb"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d36fc52c7f6c869915e99412912f22093507da8d9e942ceaf66fe4b7c14422a"
+dependencies = [
+ "windows-sys",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5bf74e1b6e971609db8ca7a9ce79fd5768ab6ae46441c572e46cf596f59e57f8"
+dependencies = [
+ "anstyle",
+ "windows-sys",
+]
+
 [[package]]
 name = "async-trait"
 version = "0.1.81"
@@ -79,6 +128,52 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "clap"
+version = "4.5.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed6719fffa43d0d87e5fd8caeab59be1554fb028cd30edc88fc4369b17971019"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "216aec2b177652e3846684cbfe25c9964d18ec45234f0f5da5157b207ed1aab6"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.5.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "501d359d5f3dcaf6ecdeee48833ae73ec6e42723a1e52419c79abf9507eec0a0"
+dependencies = [
+ "heck 0.5.0",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.72",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1462739cb27611015575c0c11df5df7601141071f07518d56fcc1be504cbec97"
+
+[[package]]
+name = "colorchoice"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3fd119d74b830634cea2a0f58bbd0d54540518a14397557951e79340abc28c0"
+
 [[package]]
 name = "data-encoding"
 version = "2.6.0"
@@ -110,6 +205,7 @@ checksum = "a7993efb860416547839c115490d4951c6d0f8ec04a3594d9dd99d50ed7ec170"
 name = "dhcpv6stateless"
 version = "0.1.0"
 dependencies = [
+ "clap",
  "dhcproto",
  "hex",
  "ipnetwork",
@@ -123,7 +219,7 @@ version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c9720bba047d567ffc8a3cba48bf19126600e249ab7f128e9233e6376976a116"
 dependencies = [
- "heck",
+ "heck 0.4.1",
  "proc-macro2",
  "quote",
  "syn 1.0.109",
@@ -207,6 +303,12 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
 [[package]]
 name = "hermit-abi"
 version = "0.3.9"
@@ -255,6 +357,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "is_terminal_polyfill"
+version = "1.70.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
+
 [[package]]
 name = "lazy_static"
 version = "1.5.0"
@@ -573,6 +681,12 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
 [[package]]
 name = "syn"
 version = "1.0.109"
@@ -743,6 +857,12 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "utf8parse"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
+
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"

Cargo.toml

@@ -4,6 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+clap = { version = "4.5.16", features = ["derive"] }
 dhcproto = "0.12.0"
 hex = "0.4.3"
 ipnetwork = "0.20.0"

src/main.rs

@@ -1,3 +1,4 @@
+use clap::Parser;
 use dhcproto::{
     Decodable,
     Decoder,
@@ -13,28 +14,30 @@ use dhcproto::{
 };
 use ipnetwork;
 use pnet;
-use std::{
+use std::net::SocketAddrV6;
-    env,
-    net::SocketAddrV6,
-};
 use tokio::net::UdpSocket;
 
 const ALL_DHCP_RELAY_AGENTS_AND_SERVERS: &str = "ff02::1:2";
 const DHCP_CLIENT_PORT: u16 = 546;
 const DHCP_RELAY_AGENT_AND_SERVER_PORT: u16 = 547;
 
+/// Requests some simple parameters using DHCPv6 from specified network
+#[derive(Parser)]
+#[command(version, about, long_about = None)]
+struct Cli {
+    /// Network interface name used for DHCPv6
+    interface: String,
+}
+
 #[tokio::main]
 async fn main() {
-    let mut args = env::args();
+    let cli = Cli::parse();
-    args.next(); // Skip executable name
-    // First argument is interface name
-    let interface_name = args.next().expect("No interface name specified");
 
     let all_interfaces = pnet::datalink::interfaces();
     let selected_interface = all_interfaces
         .iter()
-        .find(|i| i.name == interface_name)
+        .find(|i| i.name == cli.interface)
-        .expect(format!("No interface found with name: {}", interface_name).as_str());
+        .expect(format!("No interface found with name: {}", cli.interface).as_str());
 
     let ipv6_addresses = selected_interface.ips
         .iter()