1 use core::{ 2 fmt::{self, Debug}, 3 sync::atomic::AtomicUsize, 4 }; 5 6 use alloc::{boxed::Box, collections::BTreeMap, sync::Arc}; 7 8 use crate::{driver::net::NetDriver, kwarn, libs::rwlock::RwLock, syscall::SystemError}; 9 use smoltcp::wire::IpEndpoint; 10 11 use self::socket::SocketMetadata; 12 13 pub mod endpoints; 14 pub mod net_core; 15 pub mod socket; 16 pub mod syscall; 17 18 lazy_static! { 19 /// @brief 所有网络接口的列表 20 pub static ref NET_DRIVERS: RwLock<BTreeMap<usize, Arc<dyn NetDriver>>> = RwLock::new(BTreeMap::new()); 21 } 22 23 /// @brief 生成网络接口的id (全局自增) 24 pub fn generate_iface_id() -> usize { 25 static IFACE_ID: AtomicUsize = AtomicUsize::new(0); 26 return IFACE_ID 27 .fetch_add(1, core::sync::atomic::Ordering::SeqCst) 28 .into(); 29 } 30 31 /// @brief 用于指定socket的关闭类型 32 /// 参考：https://pubs.opengroup.org/onlinepubs/9699919799/functions/shutdown.html 33 #[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive)] 34 pub enum ShutdownType { 35 ShutRd = 0, // Disables further receive operations. 36 ShutWr = 1, // Disables further send operations. 37 ShutRdwr = 2, // Disables further send and receive operations. 38 } 39 40 impl TryFrom<i32> for ShutdownType { 41 type Error = SystemError; 42 43 fn try_from(value: i32) -> Result<Self, Self::Error> { 44 use num_traits::FromPrimitive; 45 <Self as FromPrimitive>::from_i32(value).ok_or(SystemError::EINVAL) 46 } 47 } 48 49 impl Into<i32> for ShutdownType { 50 fn into(self) -> i32 { 51 use num_traits::ToPrimitive; 52 <Self as ToPrimitive>::to_i32(&self).unwrap() 53 } 54 } 55 56 #[derive(Debug, Clone)] 57 pub enum Endpoint { 58 /// 链路层端点 59 LinkLayer(endpoints::LinkLayerEndpoint), 60 /// 网络层端点 61 Ip(Option<IpEndpoint>), 62 // todo: 增加NetLink机制后，增加NetLink端点 63 } 64 65 pub trait Socket: Sync + Send + Debug { 66 /// @brief 从socket中读取数据，如果socket是阻塞的，那么直到读取到数据才返回 67 /// 68 /// @param buf 读取到的数据存放的缓冲区 69 /// 70 /// @return - 成功：(返回读取的数据的长度，读取数据的端点). 71 /// - 失败：错误码 72 fn read(&self, buf: &mut [u8]) -> (Result<usize, SystemError>, Endpoint); 73 74 /// @brief 向socket中写入数据。如果socket是阻塞的，那么直到写入的数据全部写入socket中才返回 75 /// 76 /// @param buf 要写入的数据 77 /// @param to 要写入的目的端点，如果是None，那么写入的数据将会被丢弃 78 /// 79 /// @return 返回写入的数据的长度 80 fn write(&self, buf: &[u8], to: Option<Endpoint>) -> Result<usize, SystemError>; 81 82 /// @brief 对应于POSIX的connect函数，用于连接到指定的远程服务器端点 83 /// 84 /// It is used to establish a connection to a remote server. 85 /// When a socket is connected to a remote server, 86 /// the operating system will establish a network connection with the server 87 /// and allow data to be sent and received between the local socket and the remote server. 88 /// 89 /// @param endpoint 要连接的端点 90 /// 91 /// @return 返回连接是否成功 92 fn connect(&mut self, endpoint: Endpoint) -> Result<(), SystemError>; 93 94 /// @brief 对应于POSIX的bind函数，用于绑定到本机指定的端点 95 /// 96 /// The bind() function is used to associate a socket with a particular IP address and port number on the local machine. 97 /// 98 /// @param endpoint 要绑定的端点 99 /// 100 /// @return 返回绑定是否成功 101 fn bind(&mut self, _endpoint: Endpoint) -> Result<(), SystemError> { 102 return Err(SystemError::ENOSYS); 103 } 104 105 /// @brief 对应于 POSIX 的 shutdown 函数，用于关闭socket。 106 /// 107 /// shutdown() 函数用于启动网络连接的正常关闭。 108 /// 当在两个端点之间建立网络连接时，任一端点都可以通过调用其端点对象上的 shutdown() 函数来启动关闭序列。 109 /// 此函数向远程端点发送关闭消息以指示本地端点不再接受新数据。 110 /// 111 /// @return 返回是否成功关闭 112 fn shutdown(&self, _type: ShutdownType) -> Result<(), SystemError> { 113 return Err(SystemError::ENOSYS); 114 } 115 116 /// @brief 对应于POSIX的listen函数，用于监听端点 117 /// 118 /// @param backlog 最大的等待连接数 119 /// 120 /// @return 返回监听是否成功 121 fn listen(&mut self, _backlog: usize) -> Result<(), SystemError> { 122 return Err(SystemError::ENOSYS); 123 } 124 125 /// @brief 对应于POSIX的accept函数，用于接受连接 126 /// 127 /// @param endpoint 对端的端点 128 /// 129 /// @return 返回接受连接是否成功 130 fn accept(&mut self) -> Result<(Box<dyn Socket>, Endpoint), SystemError> { 131 return Err(SystemError::ENOSYS); 132 } 133 134 /// @brief 获取socket的端点 135 /// 136 /// @return 返回socket的端点 137 fn endpoint(&self) -> Option<Endpoint> { 138 return None; 139 } 140 141 /// @brief 获取socket的对端端点 142 /// 143 /// @return 返回socket的对端端点 144 fn peer_endpoint(&self) -> Option<Endpoint> { 145 return None; 146 } 147 148 /// @brief 149 /// The purpose of the poll function is to provide 150 /// a non-blocking way to check if a socket is ready for reading or writing, 151 /// so that you can efficiently handle multiple sockets in a single thread or event loop. 152 /// 153 /// @return (in, out, err) 154 /// 155 /// The first boolean value indicates whether the socket is ready for reading. If it is true, then there is data available to be read from the socket without blocking. 156 /// The second boolean value indicates whether the socket is ready for writing. If it is true, then data can be written to the socket without blocking. 157 /// The third boolean value indicates whether the socket has encountered an error condition. If it is true, then the socket is in an error state and should be closed or reset 158 /// 159 fn poll(&self) -> (bool, bool, bool) { 160 return (false, false, false); 161 } 162 163 /// @brief socket的ioctl函数 164 /// 165 /// @param cmd ioctl命令 166 /// @param arg0 ioctl命令的第一个参数 167 /// @param arg1 ioctl命令的第二个参数 168 /// @param arg2 ioctl命令的第三个参数 169 /// 170 /// @return 返回ioctl命令的返回值 171 fn ioctl( 172 &self, 173 _cmd: usize, 174 _arg0: usize, 175 _arg1: usize, 176 _arg2: usize, 177 ) -> Result<usize, SystemError> { 178 return Ok(0); 179 } 180 181 /// @brief 获取socket的元数据 182 fn metadata(&self) -> Result<SocketMetadata, SystemError>; 183 184 fn box_clone(&self) -> Box<dyn Socket>; 185 186 /// @brief 设置socket的选项 187 /// 188 /// @param level 选项的层次 189 /// @param optname 选项的名称 190 /// @param optval 选项的值 191 /// 192 /// @return 返回设置是否成功, 如果不支持该选项，返回ENOSYS 193 fn setsockopt( 194 &self, 195 _level: usize, 196 _optname: usize, 197 _optval: &[u8], 198 ) -> Result<(), SystemError> { 199 kwarn!("setsockopt is not implemented"); 200 return Ok(()); 201 } 202 } 203 204 impl Clone for Box<dyn Socket> { 205 fn clone(&self) -> Box<dyn Socket> { 206 self.box_clone() 207 } 208 } 209 210 /// IP datagram encapsulated protocol. 211 #[derive(Debug, PartialEq, Eq, Clone, Copy)] 212 #[repr(u8)] 213 pub enum Protocol { 214 HopByHop = 0x00, 215 Icmp = 0x01, 216 Igmp = 0x02, 217 Tcp = 0x06, 218 Udp = 0x11, 219 Ipv6Route = 0x2b, 220 Ipv6Frag = 0x2c, 221 Icmpv6 = 0x3a, 222 Ipv6NoNxt = 0x3b, 223 Ipv6Opts = 0x3c, 224 Unknown(u8), 225 } 226 227 impl fmt::Display for Protocol { 228 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { 229 match *self { 230 Protocol::HopByHop => write!(f, "Hop-by-Hop"), 231 Protocol::Icmp => write!(f, "ICMP"), 232 Protocol::Igmp => write!(f, "IGMP"), 233 Protocol::Tcp => write!(f, "TCP"), 234 Protocol::Udp => write!(f, "UDP"), 235 Protocol::Ipv6Route => write!(f, "IPv6-Route"), 236 Protocol::Ipv6Frag => write!(f, "IPv6-Frag"), 237 Protocol::Icmpv6 => write!(f, "ICMPv6"), 238 Protocol::Ipv6NoNxt => write!(f, "IPv6-NoNxt"), 239 Protocol::Ipv6Opts => write!(f, "IPv6-Opts"), 240 Protocol::Unknown(id) => write!(f, "0x{id:02x}"), 241 } 242 } 243 } 244 245 impl From<smoltcp::wire::IpProtocol> for Protocol { 246 fn from(value: smoltcp::wire::IpProtocol) -> Self { 247 let x: u8 = value.into(); 248 Protocol::from(x) 249 } 250 } 251 252 impl From<u8> for Protocol { 253 fn from(value: u8) -> Self { 254 match value { 255 0x00 => Protocol::HopByHop, 256 0x01 => Protocol::Icmp, 257 0x02 => Protocol::Igmp, 258 0x06 => Protocol::Tcp, 259 0x11 => Protocol::Udp, 260 0x2b => Protocol::Ipv6Route, 261 0x2c => Protocol::Ipv6Frag, 262 0x3a => Protocol::Icmpv6, 263 0x3b => Protocol::Ipv6NoNxt, 264 0x3c => Protocol::Ipv6Opts, 265 _ => Protocol::Unknown(value), 266 } 267 } 268 } 269 270 impl Into<u8> for Protocol { 271 fn into(self) -> u8 { 272 match self { 273 Protocol::HopByHop => 0x00, 274 Protocol::Icmp => 0x01, 275 Protocol::Igmp => 0x02, 276 Protocol::Tcp => 0x06, 277 Protocol::Udp => 0x11, 278 Protocol::Ipv6Route => 0x2b, 279 Protocol::Ipv6Frag => 0x2c, 280 Protocol::Icmpv6 => 0x3a, 281 Protocol::Ipv6NoNxt => 0x3b, 282 Protocol::Ipv6Opts => 0x3c, 283 Protocol::Unknown(id) => id, 284 } 285 } 286 } 287