1 use alloc::{boxed::Box, collections::BTreeMap, sync::Arc}; 2 use smoltcp::{socket::dhcpv4, wire}; 3 use system_error::SystemError; 4 5 use crate::{ 6 driver::net::NetDevice, 7 kdebug, kinfo, kwarn, 8 libs::rwlock::RwLockReadGuard, 9 net::{socket::SocketPollMethod, NET_DEVICES}, 10 time::timer::{next_n_ms_timer_jiffies, Timer, TimerFunction}, 11 }; 12 13 use super::{ 14 event_poll::{EPollEventType, EventPoll}, 15 socket::{handle::GlobalSocketHandle, inet::TcpSocket, HANDLE_MAP, SOCKET_SET}, 16 }; 17 18 /// The network poll function, which will be called by timer. 19 /// 20 /// The main purpose of this function is to poll all network interfaces. 21 #[derive(Debug)] 22 struct NetWorkPollFunc; 23 24 impl TimerFunction for NetWorkPollFunc { 25 fn run(&mut self) -> Result<(), SystemError> { 26 poll_ifaces_try_lock(10).ok(); 27 let next_time = next_n_ms_timer_jiffies(10); 28 let timer = Timer::new(Box::new(NetWorkPollFunc), next_time); 29 timer.activate(); 30 return Ok(()); 31 } 32 } 33 34 pub fn net_init() -> Result<(), SystemError> { 35 dhcp_query()?; 36 // Init poll timer function 37 // let next_time = next_n_ms_timer_jiffies(5); 38 // let timer = Timer::new(Box::new(NetWorkPollFunc), next_time); 39 // timer.activate(); 40 return Ok(()); 41 } 42 43 fn dhcp_query() -> Result<(), SystemError> { 44 let binding = NET_DEVICES.write_irqsave(); 45 46 let net_face = binding.get(&0).ok_or(SystemError::ENODEV)?.clone(); 47 48 drop(binding); 49 50 // Create sockets 51 let mut dhcp_socket = dhcpv4::Socket::new(); 52 53 // Set a ridiculously short max lease time to show DHCP renews work properly. 54 // This will cause the DHCP client to start renewing after 5 seconds, and give up the 55 // lease after 10 seconds if renew hasn't succeeded. 56 // IMPORTANT: This should be removed in production. 57 dhcp_socket.set_max_lease_duration(Some(smoltcp::time::Duration::from_secs(10))); 58 59 let dhcp_handle = SOCKET_SET.lock_irqsave().add(dhcp_socket); 60 61 const DHCP_TRY_ROUND: u8 = 10; 62 for i in 0..DHCP_TRY_ROUND { 63 kdebug!("DHCP try round: {}", i); 64 net_face.poll(&mut SOCKET_SET.lock_irqsave()).ok(); 65 let mut binding = SOCKET_SET.lock_irqsave(); 66 let event = binding.get_mut::<dhcpv4::Socket>(dhcp_handle).poll(); 67 68 match event { 69 None => {} 70 71 Some(dhcpv4::Event::Configured(config)) => { 72 // kdebug!("Find Config!! {config:?}"); 73 // kdebug!("Find ip address: {}", config.address); 74 // kdebug!("iface.ip_addrs={:?}", net_face.inner_iface.ip_addrs()); 75 76 net_face 77 .update_ip_addrs(&[wire::IpCidr::Ipv4(config.address)]) 78 .ok(); 79 80 if let Some(router) = config.router { 81 net_face 82 .inner_iface() 83 .lock() 84 .routes_mut() 85 .add_default_ipv4_route(router) 86 .unwrap(); 87 let cidr = net_face.inner_iface().lock().ip_addrs().first().cloned(); 88 if let Some(cidr) = cidr { 89 kinfo!("Successfully allocated ip by Dhcpv4! Ip:{}", cidr); 90 return Ok(()); 91 } 92 } else { 93 net_face 94 .inner_iface() 95 .lock() 96 .routes_mut() 97 .remove_default_ipv4_route(); 98 } 99 } 100 101 Some(dhcpv4::Event::Deconfigured) => { 102 kdebug!("Dhcp v4 deconfigured"); 103 net_face 104 .update_ip_addrs(&[smoltcp::wire::IpCidr::Ipv4(wire::Ipv4Cidr::new( 105 wire::Ipv4Address::UNSPECIFIED, 106 0, 107 ))]) 108 .ok(); 109 net_face 110 .inner_iface() 111 .lock() 112 .routes_mut() 113 .remove_default_ipv4_route(); 114 } 115 } 116 } 117 118 return Err(SystemError::ETIMEDOUT); 119 } 120 121 pub fn poll_ifaces() { 122 let guard: RwLockReadGuard<BTreeMap<usize, Arc<dyn NetDevice>>> = NET_DEVICES.read_irqsave(); 123 if guard.len() == 0 { 124 kwarn!("poll_ifaces: No net driver found!"); 125 return; 126 } 127 let mut sockets = SOCKET_SET.lock_irqsave(); 128 for (_, iface) in guard.iter() { 129 iface.poll(&mut sockets).ok(); 130 } 131 let _ = send_event(&sockets); 132 } 133 134 /// 对ifaces进行轮询，最多对SOCKET_SET尝试times次加锁。 135 /// 136 /// @return 轮询成功，返回Ok(()) 137 /// @return 加锁超时，返回SystemError::EAGAIN_OR_EWOULDBLOCK 138 /// @return 没有网卡，返回SystemError::ENODEV 139 pub fn poll_ifaces_try_lock(times: u16) -> Result<(), SystemError> { 140 let mut i = 0; 141 while i < times { 142 let guard: RwLockReadGuard<BTreeMap<usize, Arc<dyn NetDevice>>> = 143 NET_DEVICES.read_irqsave(); 144 if guard.len() == 0 { 145 kwarn!("poll_ifaces: No net driver found!"); 146 // 没有网卡，返回错误 147 return Err(SystemError::ENODEV); 148 } 149 let sockets = SOCKET_SET.try_lock_irqsave(); 150 // 加锁失败，继续尝试 151 if sockets.is_err() { 152 i += 1; 153 continue; 154 } 155 156 let mut sockets = sockets.unwrap(); 157 for (_, iface) in guard.iter() { 158 iface.poll(&mut sockets).ok(); 159 } 160 send_event(&sockets)?; 161 return Ok(()); 162 } 163 // 尝试次数用完，返回错误 164 return Err(SystemError::EAGAIN_OR_EWOULDBLOCK); 165 } 166 167 /// 对ifaces进行轮询，最多对SOCKET_SET尝试一次加锁。 168 /// 169 /// @return 轮询成功，返回Ok(()) 170 /// @return 加锁超时，返回SystemError::EAGAIN_OR_EWOULDBLOCK 171 /// @return 没有网卡，返回SystemError::ENODEV 172 pub fn poll_ifaces_try_lock_onetime() -> Result<(), SystemError> { 173 let guard: RwLockReadGuard<BTreeMap<usize, Arc<dyn NetDevice>>> = NET_DEVICES.read_irqsave(); 174 if guard.len() == 0 { 175 kwarn!("poll_ifaces: No net driver found!"); 176 // 没有网卡，返回错误 177 return Err(SystemError::ENODEV); 178 } 179 let mut sockets = SOCKET_SET.try_lock_irqsave()?; 180 for (_, iface) in guard.iter() { 181 iface.poll(&mut sockets).ok(); 182 } 183 send_event(&sockets)?; 184 return Ok(()); 185 } 186 187 /// ### 处理轮询后的事件 188 fn send_event(sockets: &smoltcp::iface::SocketSet) -> Result<(), SystemError> { 189 for (handle, socket_type) in sockets.iter() { 190 let handle_guard = HANDLE_MAP.read_irqsave(); 191 let global_handle = GlobalSocketHandle::new_smoltcp_handle(handle); 192 let item = handle_guard.get(&global_handle); 193 if item.is_none() { 194 continue; 195 } 196 197 let handle_item = item.unwrap(); 198 199 // 获取socket上的事件 200 let mut events = 201 SocketPollMethod::poll(socket_type, handle_item.shutdown_type()).bits() as u64; 202 203 // 分发到相应类型socket处理 204 match socket_type { 205 smoltcp::socket::Socket::Raw(_) | smoltcp::socket::Socket::Udp(_) => { 206 handle_guard 207 .get(&global_handle) 208 .unwrap() 209 .wait_queue 210 .wakeup_any(events); 211 } 212 smoltcp::socket::Socket::Icmp(_) => unimplemented!("Icmp socket hasn't unimplemented"), 213 smoltcp::socket::Socket::Tcp(inner_socket) => { 214 if inner_socket.is_active() { 215 events |= TcpSocket::CAN_ACCPET; 216 } 217 if inner_socket.state() == smoltcp::socket::tcp::State::Established { 218 events |= TcpSocket::CAN_CONNECT; 219 } 220 if inner_socket.state() == smoltcp::socket::tcp::State::CloseWait { 221 events |= EPollEventType::EPOLLHUP.bits() as u64; 222 } 223 handle_guard 224 .get(&global_handle) 225 .unwrap() 226 .wait_queue 227 .wakeup_any(events); 228 } 229 smoltcp::socket::Socket::Dhcpv4(_) => {} 230 smoltcp::socket::Socket::Dns(_) => unimplemented!("Dns socket hasn't unimplemented"), 231 } 232 EventPoll::wakeup_epoll( 233 &handle_item.epitems, 234 EPollEventType::from_bits_truncate(events as u32), 235 )?; 236 drop(handle_guard); 237 // crate::kdebug!( 238 // "{} send_event {:?}", 239 // handle, 240 // EPollEventType::from_bits_truncate(events as u32) 241 // ); 242 } 243 Ok(()) 244 } 245