1 use alloc::{boxed::Box, collections::BTreeMap, sync::Arc}; 2 use smoltcp::{iface::SocketHandle, socket::dhcpv4, wire}; 3 4 use crate::{ 5 driver::net::NetDriver, 6 kdebug, kinfo, kwarn, 7 libs::rwlock::RwLockReadGuard, 8 net::{socket::SocketPollMethod, NET_DRIVERS}, 9 syscall::SystemError, 10 time::timer::{next_n_ms_timer_jiffies, Timer, TimerFunction}, 11 }; 12 13 use super::{ 14 event_poll::EPollEventType, 15 socket::{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_DRIVERS.write(); 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().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()).ok(); 65 let mut binding = SOCKET_SET.lock(); 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 cidr.is_some() { 89 let cidr = cidr.unwrap(); 90 kinfo!("Successfully allocated ip by Dhcpv4! Ip:{}", cidr); 91 return Ok(()); 92 } 93 } else { 94 net_face 95 .inner_iface() 96 .lock() 97 .routes_mut() 98 .remove_default_ipv4_route(); 99 } 100 } 101 102 Some(dhcpv4::Event::Deconfigured) => { 103 kdebug!("Dhcp v4 deconfigured"); 104 net_face 105 .update_ip_addrs(&[smoltcp::wire::IpCidr::Ipv4(wire::Ipv4Cidr::new( 106 wire::Ipv4Address::UNSPECIFIED, 107 0, 108 ))]) 109 .ok(); 110 net_face 111 .inner_iface() 112 .lock() 113 .routes_mut() 114 .remove_default_ipv4_route(); 115 } 116 } 117 } 118 119 return Err(SystemError::ETIMEDOUT); 120 } 121 122 pub fn poll_ifaces() { 123 let guard: RwLockReadGuard<BTreeMap<usize, Arc<dyn NetDriver>>> = NET_DRIVERS.read(); 124 if guard.len() == 0 { 125 kwarn!("poll_ifaces: No net driver found!"); 126 return; 127 } 128 let mut sockets = SOCKET_SET.lock(); 129 for (_, iface) in guard.iter() { 130 iface.poll(&mut sockets).ok(); 131 } 132 let _ = send_event(&sockets); 133 } 134 135 /// 对ifaces进行轮询，最多对SOCKET_SET尝试times次加锁。 136 /// 137 /// @return 轮询成功，返回Ok(()) 138 /// @return 加锁超时，返回SystemError::EAGAIN_OR_EWOULDBLOCK 139 /// @return 没有网卡，返回SystemError::ENODEV 140 pub fn poll_ifaces_try_lock(times: u16) -> Result<(), SystemError> { 141 let mut i = 0; 142 while i < times { 143 let guard: RwLockReadGuard<BTreeMap<usize, Arc<dyn NetDriver>>> = NET_DRIVERS.read(); 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(); 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 let _ = send_event(&sockets); 161 return Ok(()); 162 } 163 164 // 尝试次数用完，返回错误 165 return Err(SystemError::EAGAIN_OR_EWOULDBLOCK); 166 } 167 168 /// 对ifaces进行轮询，最多对SOCKET_SET尝试一次加锁。 169 /// 170 /// @return 轮询成功，返回Ok(()) 171 /// @return 加锁超时，返回SystemError::EAGAIN_OR_EWOULDBLOCK 172 /// @return 没有网卡，返回SystemError::ENODEV 173 pub fn poll_ifaces_try_lock_onetime() -> Result<(), SystemError> { 174 let guard: RwLockReadGuard<BTreeMap<usize, Arc<dyn NetDriver>>> = NET_DRIVERS.read(); 175 if guard.len() == 0 { 176 kwarn!("poll_ifaces: No net driver found!"); 177 // 没有网卡，返回错误 178 return Err(SystemError::ENODEV); 179 } 180 let mut sockets = SOCKET_SET.try_lock()?; 181 for (_, iface) in guard.iter() { 182 iface.poll(&mut sockets).ok(); 183 } 184 send_event(&sockets)?; 185 return Ok(()); 186 } 187 188 /// ### 处理轮询后的事件 189 fn send_event(sockets: &smoltcp::iface::SocketSet) -> Result<(), SystemError> { 190 for (handle, socket_type) in sockets.iter() { 191 let handle_guard = HANDLE_MAP.read_irqsave(); 192 let item = handle_guard.get(&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(&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 handle_guard 221 .get(&handle) 222 .unwrap() 223 .wait_queue 224 .wakeup_any(events); 225 } 226 smoltcp::socket::Socket::Dhcpv4(_) => {} 227 smoltcp::socket::Socket::Dns(_) => unimplemented!("Dns socket hasn't unimplemented"), 228 } 229 drop(handle_guard); 230 wakeup_epoll(handle, events as u32)?; 231 // crate::kdebug!( 232 // "{} send_event {:?}", 233 // handle, 234 // EPollEventType::from_bits_truncate(events as u32) 235 // ); 236 } 237 Ok(()) 238 } 239 240 /// ### 处理epoll 241 fn wakeup_epoll(handle: SocketHandle, events: u32) -> Result<(), SystemError> { 242 let mut handle_guard = HANDLE_MAP.write_irqsave(); 243 let handle_item = handle_guard.get_mut(&handle).unwrap(); 244 let mut epitems_guard = handle_item.epitems.try_lock()?; 245 246 // 从events拿到epoll相关事件 247 let pollflags = EPollEventType::from_bits_truncate(events); 248 249 // 一次只取一个，因为一次也只有一个进程能拿到对应文件的�� 250 if let Some(epitem) = epitems_guard.pop_front() { 251 let epoll = epitem.epoll().upgrade().unwrap(); 252 let mut epoll_guard = epoll.try_lock()?; 253 let binding = epitem.clone(); 254 let event_guard = binding.event().read(); 255 let ep_events = EPollEventType::from_bits_truncate(event_guard.events()); 256 257 // 检查事件合理性以及是否有感兴趣的事件 258 if !(ep_events 259 .difference(EPollEventType::EP_PRIVATE_BITS) 260 .is_empty() 261 || pollflags.difference(ep_events).is_empty()) 262 { 263 // TODO: 未处理pm相关 264 265 // 首先将就绪的epitem加入等待队列 266 epoll_guard.ep_add_ready(epitem.clone()); 267 268 if epoll_guard.ep_has_waiter() { 269 if ep_events.contains(EPollEventType::EPOLLEXCLUSIVE) 270 && !pollflags.contains(EPollEventType::POLLFREE) 271 { 272 // 避免惊群 273 epoll_guard.ep_wake_one(); 274 } else { 275 epoll_guard.ep_wake_all(); 276 } 277 } 278 } 279 280 epitems_guard.push_back(epitem); 281 } 282 Ok(()) 283 } 284