libnfc: wip

Author: Dirbaio

rnfc-libnfc/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "rnfc-libnfc"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+anyhow = "1.0.98"
+hex-literal = "0.4.1"
+log = "0.4.20"
+nfc1-sys = { version = "0.3.9", default-features = false, features = [] }
+rnfc-traits = { path = "../rnfc-traits" }

rnfc-libnfc/examples/basic.rs

@@ -0,0 +1,9 @@
+use rnfc_libnfc::Context;
+
+fn main() {
+    let ctx = Context::new();
+    let mut dev = ctx.open(None).unwrap();
+    println!("name: {}", dev.name());
+
+    let _dep = dev.as_iso_dep().unwrap();
+}

rnfc-libnfc/src/lib.rs

@@ -0,0 +1,146 @@
+use std::ffi::{CStr, CString};
+use std::marker::PhantomData;
+use std::mem::{zeroed, MaybeUninit};
+use std::ptr::{null, null_mut};
+use std::str::FromStr;
+
+use anyhow::bail;
+use log::warn;
+use nfc1_sys::{
+    nfc_baud_rate_NBR_106, nfc_close, nfc_context, nfc_dep_mode_NDM_PASSIVE, nfc_device, nfc_device_get_name, nfc_exit,
+    nfc_init, nfc_initiator_deselect_target, nfc_initiator_init, nfc_initiator_select_dep_target, nfc_open, nfc_target,
+    nfc_version,
+};
+use rnfc_traits::iso_dep::Reader as IsoDepReader;
+
+pub struct Context {
+    context: *mut nfc_context,
+}
+
+impl Context {
+    pub fn new() -> Self {
+        let version = unsafe { CStr::from_ptr(nfc_version()) }.to_str().unwrap();
+        println!("libnfc v{}", version);
+
+        let mut context: *mut nfc_context = null_mut();
+        unsafe { nfc_init(&mut context) };
+
+        Self { context }
+    }
+
+    pub fn open(&self, connstring: Option<&str>) -> Result<Device<'_>, anyhow::Error> {
+        let connstring = connstring.map(|s| CString::new(s).unwrap());
+        let connstring_ptr = connstring.as_ref().map(|s| s.as_ptr()).unwrap_or(null()).cast_mut();
+        let device = unsafe { nfc_open(self.context, connstring_ptr) };
+        if device.is_null() {
+            bail!("Error opening NFC reader");
+        }
+
+        Ok(Device {
+            context: self.context,
+            device,
+            _phantom: PhantomData,
+        })
+    }
+}
+
+impl Drop for Context {
+    fn drop(&mut self) {
+        unsafe { nfc_exit(self.context) };
+    }
+}
+
+pub struct Device<'a> {
+    context: *mut nfc_context,
+    device: *mut nfc_device,
+    _phantom: PhantomData<&'a ()>,
+}
+
+impl<'a> Device<'a> {
+    pub fn name(&self) -> String {
+        unsafe { CStr::from_ptr(nfc_device_get_name(self.device)) }
+            .to_str()
+            .unwrap()
+            .to_string()
+    }
+
+    pub fn as_iso_dep(&mut self) -> Result<IsoDepTag<'_>, anyhow::Error> {
+        let mut nt: nfc_target = unsafe { zeroed() };
+
+        let ret = unsafe { nfc_initiator_init(self.device) };
+        if ret < 0 {
+            warn!("nfc_initiator_init failed")
+        }
+
+        let ret = unsafe {
+            nfc_initiator_select_dep_target(
+                self.device,
+                nfc_dep_mode_NDM_PASSIVE,
+                nfc_baud_rate_NBR_106,
+                null(),
+                &mut nt,
+                1000,
+            )
+        };
+        if ret < 0 {
+            warn!("nfc_initiator_select_dep_target failed")
+        }
+
+        Ok(IsoDepTag {
+            device: self.device,
+            _phantom: PhantomData,
+        })
+    }
+}
+
+impl<'a> Drop for Device<'a> {
+    fn drop(&mut self) {
+        unsafe { nfc_close(self.device) };
+    }
+}
+
+pub struct IsoDepTag<'a> {
+    device: *mut nfc_device,
+    _phantom: PhantomData<&'a ()>,
+}
+
+impl<'a> Drop for IsoDepTag<'a> {
+    fn drop(&mut self) {
+        if (unsafe { nfc_initiator_deselect_target(self.device) } < 0) {
+            warn!("nfc_initiator_deselect_target failed")
+        }
+    }
+}
+
+impl<'a> IsoDepReader for IsoDepTag<'a> {
+    type Error = anyhow::Error;
+
+    async fn transceive(&mut self, tx: &[u8], rx: &mut [u8]) -> Result<usize, Self::Error> {
+        todo!()
+    }
+}
+
+/*
+
+
+
+ printf("Sending: %s\n", abtTx);
+ int res;
+ if ((res = nfc_initiator_transceive_bytes(pnd, abtTx, sizeof(abtTx), abtRx, sizeof(abtRx), 0)) < 0) {
+   nfc_perror(pnd, "nfc_initiator_transceive_bytes");
+   nfc_close(pnd);
+   nfc_exit(context);
+   exit(EXIT_FAILURE);
+ }
+
+ abtRx[res] = 0;
+ printf("Received: %s\n", abtRx);
+
+ if (nfc_initiator_deselect_target(pnd) < 0) {
+   nfc_perror(pnd, "nfc_initiator_deselect_target");
+   nfc_close(pnd);
+   nfc_exit(context);
+   exit(EXIT_FAILURE);
+ }
+
+*/