66 lines
2.8 KiB
Rust
66 lines
2.8 KiB
Rust
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use std::{str, u16};
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use resource_scheme::ResourceScheme;
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use syscall;
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use syscall::error::{Error, Result, EACCES, ENOENT, EINVAL};
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use syscall::flag::O_RDWR;
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use common::{MacAddr, EthernetII};
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use resource::EthernetResource;
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pub struct EthernetScheme;
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impl ResourceScheme<EthernetResource> for EthernetScheme {
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fn open_resource(&self, url: &[u8], _flags: usize, uid: u32, _gid: u32) -> Result<Box<EthernetResource>> {
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if uid == 0 {
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let path = try!(str::from_utf8(url).or(Err(Error::new(EINVAL))));
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let mut parts = path.split("/");
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if let Some(host_string) = parts.next() {
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if let Some(ethertype_string) = parts.next() {
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if let Ok(network) = syscall::open("network:", O_RDWR) {
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let ethertype = u16::from_str_radix(ethertype_string, 16).unwrap_or(0) as u16;
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if !host_string.is_empty() {
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return Ok(Box::new(EthernetResource {
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network: network,
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data: Vec::new(),
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peer_addr: MacAddr::from_str(host_string),
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ethertype: ethertype,
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}));
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} else {
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loop {
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let mut bytes = [0; 65536];
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match syscall::read(network, &mut bytes) {
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Ok(count) => {
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if let Some(frame) = EthernetII::from_bytes(&bytes[..count]) {
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if frame.header.ethertype.get() == ethertype {
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return Ok(Box::new(EthernetResource {
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network: network,
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data: frame.data,
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peer_addr: frame.header.src,
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ethertype: ethertype,
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}));
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}
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}
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}
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Err(_) => break,
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}
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}
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}
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} else {
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println!("Ethernet: Failed to open network:");
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}
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} else {
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println!("Ethernet: No ethertype provided");
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}
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} else {
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println!("Ethernet: No host provided");
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}
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Err(Error::new(ENOENT))
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} else {
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Err(Error::new(EACCES))
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}
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}
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}
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