server.rs 7.1 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206
  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. use std::str;
  7. use smoltcp::iface::{InterfaceBuilder, NeighborCache, SocketSet};
  8. use smoltcp::phy::{wait as phy_wait, Device, Medium};
  9. use smoltcp::socket::{tcp, udp};
  10. use smoltcp::time::{Duration, Instant};
  11. use smoltcp::wire::{EthernetAddress, IpAddress, IpCidr};
  12. fn main() {
  13. utils::setup_logging("");
  14. let (mut opts, mut free) = utils::create_options();
  15. utils::add_tuntap_options(&mut opts, &mut free);
  16. utils::add_middleware_options(&mut opts, &mut free);
  17. let mut matches = utils::parse_options(&opts, free);
  18. let device = utils::parse_tuntap_options(&mut matches);
  19. let fd = device.as_raw_fd();
  20. let device = utils::parse_middleware_options(&mut matches, device, /*loopback=*/ false);
  21. let neighbor_cache = NeighborCache::new(BTreeMap::new());
  22. let udp_rx_buffer = udp::PacketBuffer::new(vec![udp::PacketMetadata::EMPTY], vec![0; 64]);
  23. let udp_tx_buffer = udp::PacketBuffer::new(vec![udp::PacketMetadata::EMPTY], vec![0; 128]);
  24. let udp_socket = udp::Socket::new(udp_rx_buffer, udp_tx_buffer);
  25. let tcp1_rx_buffer = tcp::SocketBuffer::new(vec![0; 64]);
  26. let tcp1_tx_buffer = tcp::SocketBuffer::new(vec![0; 128]);
  27. let tcp1_socket = tcp::Socket::new(tcp1_rx_buffer, tcp1_tx_buffer);
  28. let tcp2_rx_buffer = tcp::SocketBuffer::new(vec![0; 64]);
  29. let tcp2_tx_buffer = tcp::SocketBuffer::new(vec![0; 128]);
  30. let tcp2_socket = tcp::Socket::new(tcp2_rx_buffer, tcp2_tx_buffer);
  31. let tcp3_rx_buffer = tcp::SocketBuffer::new(vec![0; 65535]);
  32. let tcp3_tx_buffer = tcp::SocketBuffer::new(vec![0; 65535]);
  33. let tcp3_socket = tcp::Socket::new(tcp3_rx_buffer, tcp3_tx_buffer);
  34. let tcp4_rx_buffer = tcp::SocketBuffer::new(vec![0; 65535]);
  35. let tcp4_tx_buffer = tcp::SocketBuffer::new(vec![0; 65535]);
  36. let tcp4_socket = tcp::Socket::new(tcp4_rx_buffer, tcp4_tx_buffer);
  37. let ethernet_addr = EthernetAddress([0x02, 0x00, 0x00, 0x00, 0x00, 0x01]);
  38. let ip_addrs = [
  39. IpCidr::new(IpAddress::v4(192, 168, 69, 1), 24),
  40. IpCidr::new(IpAddress::v6(0xfdaa, 0, 0, 0, 0, 0, 0, 1), 64),
  41. IpCidr::new(IpAddress::v6(0xfe80, 0, 0, 0, 0, 0, 0, 1), 64),
  42. ];
  43. let medium = device.capabilities().medium;
  44. let mut builder = InterfaceBuilder::new(device).ip_addrs(ip_addrs);
  45. if medium == Medium::Ethernet {
  46. builder = builder
  47. .hardware_addr(ethernet_addr.into())
  48. .neighbor_cache(neighbor_cache);
  49. }
  50. let mut iface = builder.finalize();
  51. let mut sockets = SocketSet::new(vec![]);
  52. let udp_handle = sockets.add(udp_socket);
  53. let tcp1_handle = sockets.add(tcp1_socket);
  54. let tcp2_handle = sockets.add(tcp2_socket);
  55. let tcp3_handle = sockets.add(tcp3_socket);
  56. let tcp4_handle = sockets.add(tcp4_socket);
  57. let mut tcp_6970_active = false;
  58. loop {
  59. let timestamp = Instant::now();
  60. match iface.poll(timestamp, &mut sockets) {
  61. Ok(_) => {}
  62. Err(e) => {
  63. debug!("poll error: {}", e);
  64. }
  65. }
  66. // udp:6969: respond "hello"
  67. let socket = sockets.get::<udp::Socket>(udp_handle);
  68. if !socket.is_open() {
  69. socket.bind(6969).unwrap()
  70. }
  71. let client = match socket.recv() {
  72. Ok((data, endpoint)) => {
  73. debug!(
  74. "udp:6969 recv data: {:?} from {}",
  75. str::from_utf8(data).unwrap(),
  76. endpoint
  77. );
  78. Some(endpoint)
  79. }
  80. Err(_) => None,
  81. };
  82. if let Some(endpoint) = client {
  83. let data = b"hello\n";
  84. debug!(
  85. "udp:6969 send data: {:?}",
  86. str::from_utf8(data.as_ref()).unwrap()
  87. );
  88. socket.send_slice(data, endpoint).unwrap();
  89. }
  90. // tcp:6969: respond "hello"
  91. let socket = sockets.get::<tcp::Socket>(tcp1_handle);
  92. if !socket.is_open() {
  93. socket.listen(6969).unwrap();
  94. }
  95. if socket.can_send() {
  96. debug!("tcp:6969 send greeting");
  97. writeln!(socket, "hello").unwrap();
  98. debug!("tcp:6969 close");
  99. socket.close();
  100. }
  101. // tcp:6970: echo with reverse
  102. let socket = sockets.get::<tcp::Socket>(tcp2_handle);
  103. if !socket.is_open() {
  104. socket.listen(6970).unwrap()
  105. }
  106. if socket.is_active() && !tcp_6970_active {
  107. debug!("tcp:6970 connected");
  108. } else if !socket.is_active() && tcp_6970_active {
  109. debug!("tcp:6970 disconnected");
  110. }
  111. tcp_6970_active = socket.is_active();
  112. if socket.may_recv() {
  113. let data = socket
  114. .recv(|buffer| {
  115. let recvd_len = buffer.len();
  116. let mut data = buffer.to_owned();
  117. if !data.is_empty() {
  118. debug!(
  119. "tcp:6970 recv data: {:?}",
  120. str::from_utf8(data.as_ref()).unwrap_or("(invalid utf8)")
  121. );
  122. data = data.split(|&b| b == b'\n').collect::<Vec<_>>().concat();
  123. data.reverse();
  124. data.extend(b"\n");
  125. }
  126. (recvd_len, data)
  127. })
  128. .unwrap();
  129. if socket.can_send() && !data.is_empty() {
  130. debug!(
  131. "tcp:6970 send data: {:?}",
  132. str::from_utf8(data.as_ref()).unwrap_or("(invalid utf8)")
  133. );
  134. socket.send_slice(&data[..]).unwrap();
  135. }
  136. } else if socket.may_send() {
  137. debug!("tcp:6970 close");
  138. socket.close();
  139. }
  140. // tcp:6971: sinkhole
  141. let socket = sockets.get::<tcp::Socket>(tcp3_handle);
  142. if !socket.is_open() {
  143. socket.listen(6971).unwrap();
  144. socket.set_keep_alive(Some(Duration::from_millis(1000)));
  145. socket.set_timeout(Some(Duration::from_millis(2000)));
  146. }
  147. if socket.may_recv() {
  148. socket
  149. .recv(|buffer| {
  150. if !buffer.is_empty() {
  151. debug!("tcp:6971 recv {:?} octets", buffer.len());
  152. }
  153. (buffer.len(), ())
  154. })
  155. .unwrap();
  156. } else if socket.may_send() {
  157. socket.close();
  158. }
  159. // tcp:6972: fountain
  160. let socket = sockets.get::<tcp::Socket>(tcp4_handle);
  161. if !socket.is_open() {
  162. socket.listen(6972).unwrap()
  163. }
  164. if socket.may_send() {
  165. socket
  166. .send(|data| {
  167. if !data.is_empty() {
  168. debug!("tcp:6972 send {:?} octets", data.len());
  169. for (i, b) in data.iter_mut().enumerate() {
  170. *b = (i % 256) as u8;
  171. }
  172. }
  173. (data.len(), ())
  174. })
  175. .unwrap();
  176. }
  177. phy_wait(fd, iface.poll_delay(timestamp, &sockets)).expect("wait error");
  178. }
  179. }