server.rs 7.6 KB

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