+use std::fmt::Display;
+
+use m17core::{
+ address::{Address, Callsign, ALPHABET},
+ protocol::LsfFrame,
+};
+
+use crate::error::M17Error;
+
+pub struct LinkSetup {
+ pub(crate) raw: LsfFrame,
+}
+
+impl LinkSetup {
+ /// Provide a completed LsfFrame.
+ pub fn new_raw(frame: LsfFrame) -> Self {
+ Self { raw: frame }
+ }
+
+ /// Set up an unencrypted voice stream with channel access number 0 and the given source and destination.
+ pub fn new_voice(source: &M17Address, destination: &M17Address) -> Self {
+ Self {
+ raw: LsfFrame::new_voice(source.address(), destination.address()),
+ }
+ }
+
+ /// Set up an unencrypted packet data transmission with channel access number 0 and the given source and destination.
+ pub fn new_packet(source: &M17Address, destination: &M17Address) -> Self {
+ Self {
+ raw: LsfFrame::new_packet(source.address(), destination.address()),
+ }
+ }
+
+ /// Configure the channel access number for this transmission, which may be from 0 to 15 inclusive.
+ pub fn set_channel_access_number(&mut self, channel_access_number: u8) {
+ self.raw.set_channel_access_number(channel_access_number);
+ }
+
+ pub fn lich_part(&self, counter: u8) -> [u8; 5] {
+ let idx = counter as usize;
+ self.raw.0[idx * 5..(idx + 1) * 5].try_into().unwrap()
+ }
+}
+
+/// Station address. High level version of `Address` from core.
+
+#[derive(Debug, Clone)]
+pub struct M17Address(Address);
+
+impl M17Address {
+ pub fn new_broadcast() -> Self {
+ Self(Address::Broadcast)
+ }
+
+ pub fn from_callsign(callsign: &str) -> Result<Self, M17Error> {
+ let trimmed = callsign.trim().to_uppercase();
+ let len = trimmed.len();
+ if len > 9 {
+ return Err(M17Error::CallsignTooLong(len));
+ }
+ let mut address = [b' '; 9];
+ for (i, c) in trimmed.chars().enumerate() {
+ if !c.is_ascii() {
+ return Err(M17Error::InvalidCallsignCharacters(c));
+ }
+ if !ALPHABET.contains(&(c as u8)) {
+ return Err(M17Error::InvalidCallsignCharacters(c));
+ }
+ address[i] = c as u8;
+ }
+ Ok(Self(Address::Callsign(Callsign(address))))
+ }
+
+ pub(crate) fn address(&self) -> &Address {
+ &self.0
+ }
+}
+
+impl Display for M17Address {
+ fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+ match self.0 {
+ Address::Invalid => unreachable!(),
+ Address::Callsign(ref callsign) => {
+ write!(
+ f,
+ "{}",
+ callsign
+ .0
+ .iter()
+ .map(|c| *c as char)
+ .collect::<String>()
+ .trim()
+ )
+ }
+ Address::Reserved(_) => unreachable!(),
+ Address::Broadcast => {
+ write!(f, "<BROADCAST>")
+ }
+ }
+ }
+}
projects / m17rt / commitdiff