add ip4 config2 protocol

Signed-off-by: Gerd Hoffmann <[email protected]>

Author: kraxel

uefi/src/proto/network/ip4config2.rs

@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
+#![cfg(feature = "alloc")]
+
+//! IP4 Config2 Protocol.
+
+use alloc::vec;
+use alloc::vec::Vec;
+use core::ffi::c_void;
+
+use uefi::boot::ScopedProtocol;
+use uefi::prelude::*;
+use uefi::proto::unsafe_protocol;
+use uefi::{print, println};
+use uefi_raw::protocol::network::ip4_config2::{
+    Ip4Config2DataType, Ip4Config2InterfaceInfo, Ip4Config2Policy, Ip4Config2Protocol,
+};
+use uefi_raw::Ipv4Address;
+
+/// IP4 Config2 [`Protocol`]. Configure IPv4 networking.
+///
+/// [`Protocol`]: uefi::proto::Protocol
+#[derive(Debug)]
+#[unsafe_protocol(Ip4Config2Protocol::GUID)]
+pub struct Ip4Config2(pub Ip4Config2Protocol);
+
+impl Ip4Config2 {
+    /// Open IP4 Config2 protocol for the given NIC handle.
+    pub fn new(nic_handle: Handle) -> uefi::Result<ScopedProtocol<Self>> {
+        let protocol;
+        unsafe {
+            protocol = boot::open_protocol::<Self>(
+                boot::OpenProtocolParams {
+                    handle: nic_handle,
+                    agent: boot::image_handle(),
+                    controller: None,
+                },
+                boot::OpenProtocolAttributes::GetProtocol,
+            )?;
+        }
+        Ok(protocol)
+    }
+
+    /// Set configuration data.  It is recommended to type-specific set_* helpers instead of calling this directly.
+    pub fn set_data(&mut self, data_type: Ip4Config2DataType, data: &mut [u8]) -> uefi::Result<()> {
+        let status = unsafe {
+            let data_ptr = data.as_mut_ptr().cast::<c_void>();
+            (self.0.set_data)(&mut self.0, data_type, data.len(), data_ptr)
+        };
+        match status {
+            Status::SUCCESS => Ok(()),
+            _ => Err(status.into()),
+        }
+    }
+
+    /// Get configuration data.  It is recommended to type-specific get_* helpers instead of calling this directly.
+    pub fn get_data(&mut self, data_type: Ip4Config2DataType) -> uefi::Result<Vec<u8>> {
+        let mut data_size = 0;
+
+        // call #1: figure return buffer size
+        let status = unsafe {
+            let null = core::ptr::null_mut();
+            (self.0.get_data)(&mut self.0, data_type, &mut data_size, null)
+        };
+        if status != Status::BUFFER_TOO_SMALL {
+            return Err(status.into());
+        }
+
+        // call #2: get data
+        let mut data = vec![0; data_size];
+        let status = unsafe {
+            let data_ptr = data.as_mut_ptr().cast::<c_void>();
+            (self.0.get_data)(&mut self.0, data_type, &mut data_size, data_ptr)
+        };
+        match status {
+            Status::SUCCESS => Ok(data),
+            _ => Err(status.into()),
+        }
+    }
+
+    /// Set config policy (static vs. dhcp).
+    pub fn set_policy(&mut self, policy: Ip4Config2Policy) -> uefi::Result<()> {
+        let mut data: [u8; 4] = policy.0.to_ne_bytes();
+        self.set_data(Ip4Config2DataType::POLICY, &mut data)
+    }
+
+    /// Get current interface configuration.
+    pub fn get_interface_info(&mut self) -> uefi::Result<Ip4Config2InterfaceInfo> {
+        let data = self.get_data(Ip4Config2DataType::INTERFACE_INFO)?;
+        let info: &Ip4Config2InterfaceInfo =
+            unsafe { &*(data.as_ptr().cast::<Ip4Config2InterfaceInfo>()) };
+        Ok(Ip4Config2InterfaceInfo {
+            name: info.name,
+            if_type: info.if_type,
+            hw_addr_size: info.hw_addr_size,
+            hw_addr: info.hw_addr,
+            station_addr: info.station_addr,
+            subnet_mask: info.subnet_mask,
+            route_table_size: 0,
+            route_table: core::ptr::null_mut(),
+        })
+    }
+
+    fn print_info(info: &Ip4Config2InterfaceInfo) {
+        println!(
+            "addr v4: {}.{}.{}.{}",
+            info.station_addr.0[0],
+            info.station_addr.0[1],
+            info.station_addr.0[2],
+            info.station_addr.0[3],
+        );
+    }
+
+    /// Bring up network interface.  Does nothing in case the network
+    /// is already set up.  Otherwise turns on DHCP and waits until an
+    /// IPv4 address has been assigned.  Reports progress on the
+    /// console if verbose is set to true.  Returns TIMEOUT error in
+    /// case DHCP configuration does not finish within 30 seconds.
+    pub fn ifup(&mut self, verbose: bool) -> uefi::Result<()> {
+        let no_address = Ipv4Address::default();
+
+        let info = self.get_interface_info()?;
+        if info.station_addr != no_address {
+            if verbose {
+                print!("Network is already up: ");
+                Self::print_info(&info);
+            }
+            return Ok(());
+        }
+
+        if verbose {
+            print!("DHCP ");
+        }
+        self.set_policy(Ip4Config2Policy::DHCP)?;
+
+        for _ in 0..30 {
+            if verbose {
+                print!(".");
+            }
+            boot::stall(1_000_000);
+            let info = self.get_interface_info()?;
+            if info.station_addr != no_address {
+                if verbose {
+                    print!(" OK: ");
+                    Self::print_info(&info);
+                }
+                return Ok(());
+            }
+        }
+
+        Err(Status::TIMEOUT.into())
+    }
+}

uefi/src/proto/network/mod.rs

@@ -4,6 +4,7 @@
 //!
 //! These protocols can be used to interact with network resources.
 
+pub mod ip4config2;
 pub mod pxe;
 pub mod snp;