code.octet-stream.net Git - netwatcher/blob - src/list_win.rs

   1 use std::collections::HashMap;
   2 use std::fmt::Write;
   3 use std::net::IpAddr;
   4
   5 use windows::Win32::Foundation::{
   6     ERROR_ADDRESS_NOT_ASSOCIATED, ERROR_BUFFER_OVERFLOW, ERROR_INVALID_PARAMETER,
   7     ERROR_NOT_ENOUGH_MEMORY, ERROR_NO_DATA, ERROR_SUCCESS, WIN32_ERROR,
   8 };
   9 use windows::Win32::NetworkManagement::IpHelper::{
  10     GetAdaptersAddresses, IP_ADAPTER_UNICAST_ADDRESS_LH,
  11 };
  12 use windows::Win32::NetworkManagement::IpHelper::{
  13     GAA_FLAG_SKIP_ANYCAST, GAA_FLAG_SKIP_MULTICAST, IP_ADAPTER_ADDRESSES_LH,
  14 };
  15 use windows::Win32::NetworkManagement::Ndis::IfOperStatusDown;
  16 use windows::Win32::Networking::WinSock::{
  17     AF_INET, AF_INET6, AF_UNSPEC, SOCKADDR, SOCKADDR_IN, SOCKADDR_IN6,
  18 };
  19
  20 use crate::{Error, Interface, List};
  21
  22 pub(crate) fn list_interfaces() -> Result<List, Error> {
  23     let mut ifs = HashMap::new();
  24     // Microsoft recommends a 15 KB initial buffer
  25     let start_size = 15 * 1024;
  26     let mut buf: Vec<u8> = vec![0; start_size];
  27     let mut sizepointer: u32 = start_size as u32;
  28
  29     unsafe {
  30         loop {
  31             let bufptr = &mut buf[0] as *mut _ as *mut IP_ADAPTER_ADDRESSES_LH;
  32             let res = GetAdaptersAddresses(
  33                 AF_UNSPEC.0.into(),
  34                 GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST,
  35                 None,
  36                 Some(bufptr),
  37                 &mut sizepointer,
  38             );
  39             match WIN32_ERROR(res) {
  40                 ERROR_SUCCESS => break,
  41                 ERROR_ADDRESS_NOT_ASSOCIATED => return Err(Error::Internal),
  42                 ERROR_BUFFER_OVERFLOW => {
  43                     buf.resize(sizepointer as usize, 0);
  44                     continue;
  45                 }
  46                 ERROR_INVALID_PARAMETER => return Err(Error::Internal),
  47                 ERROR_NOT_ENOUGH_MEMORY => return Err(Error::Internal),
  48                 ERROR_NO_DATA => return Ok(List(HashMap::new())), // there aren't any
  49                 _ => return Err(Error::Internal), // TODO: Use FormatMessage to get a string
  50             }
  51         }
  52
  53         // We have at least one
  54         let mut adapter_ptr = &buf[0] as *const _ as *const IP_ADAPTER_ADDRESSES_LH;
  55         while !adapter_ptr.is_null() {
  56             let adapter = &*adapter_ptr as &IP_ADAPTER_ADDRESSES_LH;
  57             if adapter.OperStatus == IfOperStatusDown {
  58                 adapter_ptr = adapter.Next;
  59                 continue;
  60             }
  61             let mut hw_addr = String::with_capacity(adapter.PhysicalAddressLength as usize * 3);
  62             for i in 0..adapter.PhysicalAddressLength as usize {
  63                 if i != 0 {
  64                     write!(hw_addr, ":").map_err(|_| Error::Internal)?;
  65                 }
  66                 write!(hw_addr, "{:02X}", adapter.PhysicalAddress[i])
  67                     .map_err(|_| Error::Internal)?;
  68             }
  69             let mut ips = vec![];
  70             let mut unicast_ptr = adapter.FirstUnicastAddress;
  71             while !unicast_ptr.is_null() {
  72                 let unicast = &*unicast_ptr as &IP_ADAPTER_UNICAST_ADDRESS_LH;
  73                 let sockaddr = &*unicast.Address.lpSockaddr as &SOCKADDR;
  74                 let ip = match sockaddr.sa_family {
  75                     AF_INET => {
  76                         let sockaddr_in =
  77                             &*(unicast.Address.lpSockaddr as *const SOCKADDR_IN) as &SOCKADDR_IN;
  78                         IpAddr::V4(sockaddr_in.sin_addr.into())
  79                     }
  80                     AF_INET6 => {
  81                         let sockaddr_in6 =
  82                             &*(unicast.Address.lpSockaddr as *const SOCKADDR_IN6) as &SOCKADDR_IN6;
  83                         IpAddr::V6(sockaddr_in6.sin6_addr.into())
  84                     }
  85                     _ => continue,
  86                 };
  87                 ips.push(ip);
  88                 unicast_ptr = unicast.Next;
  89             }
  90             let ifindex = adapter.Ipv6IfIndex;
  91             let name = adapter
  92                 .FriendlyName
  93                 .to_string()
  94                 .unwrap_or_else(|_| "".to_owned());
  95             let iface = Interface {
  96                 index: ifindex,
  97                 name,
  98                 hw_addr,
  99                 ips,
 100             };
 101             ifs.insert(ifindex, iface);
 102             adapter_ptr = adapter.Next;
 103         }
 104     }
 105
 106     Ok(List(ifs))
 107 }