Merge pull request #72 from tana/ap-mode

Add AP mode

src/consts.rs

@@ -93,8 +93,11 @@ pub(crate) const IRQ_F2_INTR: u16 = 0x4000;
 pub(crate) const IRQ_F3_INTR: u16 = 0x8000;
 
 pub(crate) const IOCTL_CMD_UP: u32 = 2;
+pub(crate) const IOCTL_CMD_DOWN: u32 = 3;
 pub(crate) const IOCTL_CMD_SET_SSID: u32 = 26;
+pub(crate) const IOCTL_CMD_SET_CHANNEL: u32 = 30;
 pub(crate) const IOCTL_CMD_ANTDIV: u32 = 64;
+pub(crate) const IOCTL_CMD_SET_AP: u32 = 118;
 pub(crate) const IOCTL_CMD_SET_VAR: u32 = 263;
 pub(crate) const IOCTL_CMD_GET_VAR: u32 = 262;
 pub(crate) const IOCTL_CMD_SET_PASSPHRASE: u32 = 268;
@@ -109,6 +112,21 @@ pub(crate) const READ: bool = false;
 pub(crate) const INC_ADDR: bool = true;
 pub(crate) const FIXED_ADDR: bool = false;
 
+pub(crate) const AES_ENABLED: u32 = 0x0004;
+pub(crate) const WPA2_SECURITY: u32 = 0x00400000;
+
+pub(crate) const MIN_PSK_LEN: usize = 8;
+pub(crate) const MAX_PSK_LEN: usize = 64;
+
+// Security type (authentication and encryption types are combined using bit mask)
+#[allow(non_camel_case_types)]
+#[derive(Copy, Clone, PartialEq)]
+#[repr(u32)]
+pub(crate) enum Security {
+    OPEN = 0,
+    WPA2_AES_PSK = WPA2_SECURITY | AES_ENABLED,
+}
+
 #[allow(non_camel_case_types)]
 #[derive(Copy, Clone)]
 #[repr(u8)]

src/control.rs

@@ -226,6 +226,73 @@ impl<'a> Control<'a> {
             .await
     }
 
+    pub async fn start_ap_open(&mut self, ssid: &str, channel: u8) {
+        self.start_ap(ssid, "", Security::OPEN, channel).await;
+    }
+
+    pub async fn start_ap_wpa2(&mut self, ssid: &str, passphrase: &str, channel: u8) {
+        self.start_ap(ssid, passphrase, Security::WPA2_AES_PSK, channel).await;
+    }
+
+    async fn start_ap(&mut self, ssid: &str, passphrase: &str, security: Security, channel: u8) {
+        if security != Security::OPEN
+            && (passphrase.as_bytes().len() < MIN_PSK_LEN || passphrase.as_bytes().len() > MAX_PSK_LEN)
+        {
+            panic!("Passphrase is too short or too long");
+        }
+
+        // Temporarily set wifi down
+        self.ioctl(IoctlType::Set, IOCTL_CMD_DOWN, 0, &mut []).await;
+
+        // Turn off APSTA mode
+        self.set_iovar_u32("apsta", 0).await;
+
+        // Set wifi up again
+        self.ioctl(IoctlType::Set, IOCTL_CMD_UP, 0, &mut []).await;
+
+        // Turn on AP mode
+        self.ioctl_set_u32(IOCTL_CMD_SET_AP, 0, 1).await;
+
+        // Set SSID
+        let mut i = SsidInfoWithIndex {
+            index: 0,
+            ssid_info: SsidInfo {
+                len: ssid.as_bytes().len() as _,
+                ssid: [0; 32],
+            },
+        };
+        i.ssid_info.ssid[..ssid.as_bytes().len()].copy_from_slice(ssid.as_bytes());
+        self.set_iovar("bsscfg:ssid", &i.to_bytes()).await;
+
+        // Set channel number
+        self.ioctl_set_u32(IOCTL_CMD_SET_CHANNEL, 0, channel as u32).await;
+
+        // Set security
+        self.set_iovar_u32x2("bsscfg:wsec", 0, (security as u32) & 0xFF).await;
+
+        if security != Security::OPEN {
+            self.set_iovar_u32x2("bsscfg:wpa_auth", 0, 0x0084).await; // wpa_auth = WPA2_AUTH_PSK | WPA_AUTH_PSK
+
+            Timer::after(Duration::from_millis(100)).await;
+
+            // Set passphrase
+            let mut pfi = PassphraseInfo {
+                len: passphrase.as_bytes().len() as _,
+                flags: 1, // WSEC_PASSPHRASE
+                passphrase: [0; 64],
+            };
+            pfi.passphrase[..passphrase.as_bytes().len()].copy_from_slice(passphrase.as_bytes());
+            self.ioctl(IoctlType::Set, IOCTL_CMD_SET_PASSPHRASE, 0, &mut pfi.to_bytes())
+                .await;
+        }
+
+        // Change mutlicast rate from 1 Mbps to 11 Mbps
+        self.set_iovar_u32("2g_mrate", 11000000 / 500000).await;
+
+        // Start AP
+        self.set_iovar_u32x2("bss", 0, 1).await; // bss = BSS_UP
+    }
+
     async fn set_iovar_u32x2(&mut self, name: &str, val1: u32, val2: u32) {
         let mut buf = [0; 8];
         buf[0..4].copy_from_slice(&val1.to_le_bytes());

src/structs.rs

@@ -389,6 +389,15 @@ pub struct PassphraseInfo {
 }
 impl_bytes!(PassphraseInfo);
 
+#[derive(Clone, Copy)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
+#[repr(C)]
+pub struct SsidInfoWithIndex {
+    pub index: u32,
+    pub ssid_info: SsidInfo,
+}
+impl_bytes!(SsidInfoWithIndex);
+
 #[derive(Clone, Copy)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[repr(C)]