server.rs 8.1 KB

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  1. mod utils;
  2. use log::debug;
  3. use std::collections::BTreeMap;
  4. use std::fmt::Write;
  5. use std::os::unix::io::AsRawFd;
  6. #[cfg(any(
  7. feature = "proto-sixlowpan-fragmentation",
  8. feature = "proto-ipv4-fragmentation"
  9. ))]
  10. use smoltcp::iface::ReassemblyBuffer;
  11. use smoltcp::iface::{InterfaceBuilder, NeighborCache, SocketSet};
  12. use smoltcp::phy::{wait as phy_wait, Device, Medium};
  13. use smoltcp::socket::{tcp, udp};
  14. use smoltcp::time::{Duration, Instant};
  15. use smoltcp::wire::{EthernetAddress, IpAddress, IpCidr};
  16. fn main() {
  17. utils::setup_logging("");
  18. let (mut opts, mut free) = utils::create_options();
  19. utils::add_tuntap_options(&mut opts, &mut free);
  20. utils::add_middleware_options(&mut opts, &mut free);
  21. let mut matches = utils::parse_options(&opts, free);
  22. let device = utils::parse_tuntap_options(&mut matches);
  23. let fd = device.as_raw_fd();
  24. let mut device =
  25. utils::parse_middleware_options(&mut matches, device, /*loopback=*/ false);
  26. let neighbor_cache = NeighborCache::new(BTreeMap::new());
  27. let udp_rx_buffer = udp::PacketBuffer::new(
  28. vec![udp::PacketMetadata::EMPTY, udp::PacketMetadata::EMPTY],
  29. vec![0; 65535],
  30. );
  31. let udp_tx_buffer = udp::PacketBuffer::new(
  32. vec![udp::PacketMetadata::EMPTY, udp::PacketMetadata::EMPTY],
  33. vec![0; 65535],
  34. );
  35. let udp_socket = udp::Socket::new(udp_rx_buffer, udp_tx_buffer);
  36. let tcp1_rx_buffer = tcp::SocketBuffer::new(vec![0; 64]);
  37. let tcp1_tx_buffer = tcp::SocketBuffer::new(vec![0; 128]);
  38. let tcp1_socket = tcp::Socket::new(tcp1_rx_buffer, tcp1_tx_buffer);
  39. let tcp2_rx_buffer = tcp::SocketBuffer::new(vec![0; 64]);
  40. let tcp2_tx_buffer = tcp::SocketBuffer::new(vec![0; 128]);
  41. let tcp2_socket = tcp::Socket::new(tcp2_rx_buffer, tcp2_tx_buffer);
  42. let tcp3_rx_buffer = tcp::SocketBuffer::new(vec![0; 65535]);
  43. let tcp3_tx_buffer = tcp::SocketBuffer::new(vec![0; 65535]);
  44. let tcp3_socket = tcp::Socket::new(tcp3_rx_buffer, tcp3_tx_buffer);
  45. let tcp4_rx_buffer = tcp::SocketBuffer::new(vec![0; 65535]);
  46. let tcp4_tx_buffer = tcp::SocketBuffer::new(vec![0; 65535]);
  47. let tcp4_socket = tcp::Socket::new(tcp4_rx_buffer, tcp4_tx_buffer);
  48. let ethernet_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x01]);
  49. let mut ip_addrs = heapless::Vec::<IpCidr, 4>::new();
  50. ip_addrs.push(IpCidr::new(IpAddress::v4(192, 168, 69, 1), 24)).unwrap();
  51. ip_addrs.push(IpCidr::new(IpAddress::v6(0xfdaa, 0, 0, 0, 0, 0, 0, 1), 64)).unwrap();
  52. ip_addrs.push(IpCidr::new(IpAddress::v6(0xfe80, 0, 0, 0, 0, 0, 0, 1), 64)).unwrap();
  53. let medium = device.capabilities().medium;
  54. let mut builder = InterfaceBuilder::new().ip_addrs(ip_addrs);
  55. builder = builder.random_seed(
  56. std::time::SystemTime::now()
  57. .duration_since(std::time::UNIX_EPOCH)
  58. .unwrap()
  59. .as_secs(),
  60. );
  61. #[cfg(feature = "proto-ipv4-fragmentation")]
  62. let mut ipv4_out_packet_cache = [0u8; 10_000];
  63. #[cfg(feature = "proto-ipv4-fragmentation")]
  64. {
  65. let ipv4_frag_cache = ReassemblyBuffer::new(vec![], BTreeMap::new());
  66. builder = builder
  67. .ipv4_reassembly_buffer(ipv4_frag_cache)
  68. .ipv4_fragmentation_buffer(&mut ipv4_out_packet_cache[..]);
  69. }
  70. #[cfg(feature = "proto-sixlowpan-fragmentation")]
  71. let mut sixlowpan_out_packet_cache = [0u8; 1280];
  72. #[cfg(feature = "proto-sixlowpan-fragmentation")]
  73. {
  74. let sixlowpan_frag_cache = ReassemblyBuffer::new(vec![], BTreeMap::new());
  75. builder = builder
  76. .sixlowpan_reassembly_buffer(sixlowpan_frag_cache)
  77. .sixlowpan_fragmentation_buffer(&mut sixlowpan_out_packet_cache[..]);
  78. }
  79. if medium == Medium::Ethernet {
  80. builder = builder
  81. .hardware_addr(ethernet_addr.into())
  82. .neighbor_cache(neighbor_cache);
  83. }
  84. let mut iface = builder.finalize(&mut device);
  85. let mut sockets = SocketSet::new(vec![]);
  86. let udp_handle = sockets.add(udp_socket);
  87. let tcp1_handle = sockets.add(tcp1_socket);
  88. let tcp2_handle = sockets.add(tcp2_socket);
  89. let tcp3_handle = sockets.add(tcp3_socket);
  90. let tcp4_handle = sockets.add(tcp4_socket);
  91. let mut tcp_6970_active = false;
  92. loop {
  93. let timestamp = Instant::now();
  94. match iface.poll(timestamp, &mut device, &mut sockets) {
  95. Ok(_) => {}
  96. Err(e) => {
  97. debug!("poll error: {}", e);
  98. }
  99. }
  100. // udp:6969: respond "hello"
  101. let socket = sockets.get_mut::<udp::Socket>(udp_handle);
  102. if !socket.is_open() {
  103. socket.bind(6969).unwrap()
  104. }
  105. let client = match socket.recv() {
  106. Ok((data, endpoint)) => {
  107. debug!("udp:6969 recv data: {:?} from {}", data, endpoint);
  108. let mut data = data.to_vec();
  109. data.reverse();
  110. Some((endpoint, data))
  111. }
  112. Err(_) => None,
  113. };
  114. if let Some((endpoint, data)) = client {
  115. debug!("udp:6969 send data: {:?} to {}", data, endpoint,);
  116. socket.send_slice(&data, endpoint).unwrap();
  117. }
  118. // tcp:6969: respond "hello"
  119. let socket = sockets.get_mut::<tcp::Socket>(tcp1_handle);
  120. if !socket.is_open() {
  121. socket.listen(6969).unwrap();
  122. }
  123. if socket.can_send() {
  124. debug!("tcp:6969 send greeting");
  125. writeln!(socket, "hello").unwrap();
  126. debug!("tcp:6969 close");
  127. socket.close();
  128. }
  129. // tcp:6970: echo with reverse
  130. let socket = sockets.get_mut::<tcp::Socket>(tcp2_handle);
  131. if !socket.is_open() {
  132. socket.listen(6970).unwrap()
  133. }
  134. if socket.is_active() && !tcp_6970_active {
  135. debug!("tcp:6970 connected");
  136. } else if !socket.is_active() && tcp_6970_active {
  137. debug!("tcp:6970 disconnected");
  138. }
  139. tcp_6970_active = socket.is_active();
  140. if socket.may_recv() {
  141. let data = socket
  142. .recv(|buffer| {
  143. let recvd_len = buffer.len();
  144. let mut data = buffer.to_owned();
  145. if !data.is_empty() {
  146. debug!("tcp:6970 recv data: {:?}", data);
  147. data = data.split(|&b| b == b'\n').collect::<Vec<_>>().concat();
  148. data.reverse();
  149. data.extend(b"\n");
  150. }
  151. (recvd_len, data)
  152. })
  153. .unwrap();
  154. if socket.can_send() && !data.is_empty() {
  155. debug!("tcp:6970 send data: {:?}", data);
  156. socket.send_slice(&data[..]).unwrap();
  157. }
  158. } else if socket.may_send() {
  159. debug!("tcp:6970 close");
  160. socket.close();
  161. }
  162. // tcp:6971: sinkhole
  163. let socket = sockets.get_mut::<tcp::Socket>(tcp3_handle);
  164. if !socket.is_open() {
  165. socket.listen(6971).unwrap();
  166. socket.set_keep_alive(Some(Duration::from_millis(1000)));
  167. socket.set_timeout(Some(Duration::from_millis(2000)));
  168. }
  169. if socket.may_recv() {
  170. socket
  171. .recv(|buffer| {
  172. if !buffer.is_empty() {
  173. debug!("tcp:6971 recv {:?} octets", buffer.len());
  174. }
  175. (buffer.len(), ())
  176. })
  177. .unwrap();
  178. } else if socket.may_send() {
  179. socket.close();
  180. }
  181. // tcp:6972: fountain
  182. let socket = sockets.get_mut::<tcp::Socket>(tcp4_handle);
  183. if !socket.is_open() {
  184. socket.listen(6972).unwrap()
  185. }
  186. if socket.may_send() {
  187. socket
  188. .send(|data| {
  189. if !data.is_empty() {
  190. debug!("tcp:6972 send {:?} octets", data.len());
  191. for (i, b) in data.iter_mut().enumerate() {
  192. *b = (i % 256) as u8;
  193. }
  194. }
  195. (data.len(), ())
  196. })
  197. .unwrap();
  198. }
  199. phy_wait(fd, iface.poll_delay(timestamp, &sockets)).expect("wait error");
  200. }
  201. }