git.sesse.net Git - rdpsrv/blob - rdpsrv.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <errno.h>
   5 #include <sys/select.h>
   6 #include <sys/socket.h>
   7 #include <sys/ioctl.h>
   8 #include <arpa/inet.h>
   9
  10 #include "rdesktop.h"
  11
  12 const int tcp_port_rdp = 3389;
  13 int create_server_socket();
  14 int serve_client();
  15
  16 int main()
  17 {
  18         int server_sock = create_server_socket();
  19         for ( ;; ) {
  20                 iso_recv_connect(server_sock);
  21                 printf("Got connection.\n");
  22                 serve_client();
  23                 printf("Client closed.\n");
  24         }
  25 }
  26
  27 int create_server_socket()
  28 {
  29         int server_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  30         const unsigned int one = 1, zero = 0;
  31         struct sockaddr_in addr;
  32         int err;
  33
  34         setsockopt(server_sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
  35         ioctl(server_sock, FIONBIO, &zero);
  36
  37         addr.sin_family = AF_INET;
  38         addr.sin_addr.s_addr = INADDR_ANY;
  39         addr.sin_port = htons(tcp_port_rdp);
  40
  41         do {
  42                 err = bind(server_sock, (struct sockaddr *)&addr, sizeof(struct sockaddr));
  43
  44                 if (err == -1) {
  45                         perror("bind()");
  46
  47                         /* try to recover from recoverable errors... */
  48                         if (errno == ENOMEM || errno == EADDRINUSE) {
  49                                 puts("Waiting 1 sec before trying again...");
  50                                 sleep(1);
  51                         } else {
  52                                 puts("Giving up.");
  53                                 exit(1);
  54                         }
  55                 }
  56         } while (err == -1);
  57
  58         listen(server_sock, 20);
  59         return server_sock;
  60 }
  61
  62 void handle_input_pdu(STREAM s)
  63 {
  64         uint32 time;
  65         uint16 message_type, device_flags, param1, param2;
  66         uint16 num_events;
  67         int i;
  68
  69         in_uint16_le(s, num_events);   // number of events
  70         in_uint8s(s, 2);        // pad
  71
  72         for (i = 0; i < num_events; ++i) {
  73                 rdp_recv_input(s, &time, &message_type, &device_flags, &param1, &param2);
  74                 printf("Input event at time %u\n", time);
  75
  76                 switch (message_type) {
  77                 case RDP_INPUT_SYNCHRONIZE:
  78                         printf("- Type: Synchronize (ignored)\n");
  79                         break;
  80                 case RDP_INPUT_CODEPOINT:
  81                         printf("- Type: Codepoint (ignored)\n");
  82                         break;
  83                 case RDP_INPUT_VIRTKEY:
  84                         printf("- Type: Virtual key (ignored)\n");
  85                         break;
  86                 case RDP_INPUT_SCANCODE:
  87                         printf("- Type: Scancode (ignored)\n");
  88                         break;
  89                 case RDP_INPUT_MOUSE:
  90                         printf("- Type: Mouse\n");
  91                         printf("- Device flags: %x\n", device_flags);
  92                         printf("- Position: (%u,%u)\n", param1, param2);
  93
  94                         break;
  95                 default:
  96                         printf("- Unknown type %x\n", message_type);
  97                         break;
  98                 }
  99                 printf("\n");
 100         }
 101 }
 102
 103 struct ServerInitialization {
 104         unsigned short width;
 105         unsigned short height;
 106         unsigned char pixelformat[16]; // FIXME
 107         unsigned int name_len;
 108 };
 109
 110 int vnc_init()
 111 {
 112         char buf[256];
 113         int vnc_sock = tcp_connect("127.0.0.1", 5901);
 114         struct ServerInitialization si;
 115
 116         // get handshake
 117         if (read(vnc_sock, buf, 12) != 12)
 118                 error("short read on handshake\n");
 119         write(vnc_sock, "RFB 003.003\n", 12);
 120
 121         // get auth
 122         if (read(vnc_sock, buf, 4) != 4)
 123                 error("short read on auth\n");
 124
 125         if (buf[3] != 1)
 126                 error("auth needed or connection failed\n");
 127
 128         // send shared flag
 129         buf[0] = 1;
 130         write(vnc_sock, buf, 1);
 131
 132         // read the server initialization
 133         if (read(vnc_sock, &si, sizeof(struct ServerInitialization)) != sizeof(struct ServerInitialization))
 134                 error("short read on SI");
 135
 136         printf("Server is %u x %u\n", ntohs(si.width), ntohs(si.height));
 137
 138         if (read(vnc_sock, buf, ntohl(si.name_len)) != ntohl(si.name_len))
 139                 error("short read on server name\n");
 140
 141         printf("Server name is '%*s' (%u bytes)\n", ntohl(si.name_len), buf, ntohl(si.name_len));
 142
 143         // we can only accept raw encoding
 144         buf[0] = 2; // message type
 145         buf[1] = 0; // padding
 146         buf[2] = 0; // number of encodings
 147         buf[3] = 1;
 148         buf[4] = 0; // raw encoding
 149         buf[5] = 0;
 150         buf[6] = 0;
 151         buf[7] = 0;
 152
 153         write(vnc_sock, buf, 8);
 154
 155         // request the entire framebuffer
 156         buf[0] = 3; // message type
 157         buf[1] = 0; // incremental
 158         buf[2] = 0; // xpos
 159         buf[3] = 0;
 160         buf[4] = 0; // ypos
 161         buf[5] = 0;
 162         buf[6] = 0; // width
 163         buf[7] = 640 % 0xff;
 164         buf[8] = 0; // height
 165         buf[9] = 480 % 0xff;
 166
 167         write(vnc_sock, buf, 10);
 168
 169         printf("Connected to VNC!\n");
 170
 171         return vnc_sock;
 172 }
 173
 174 struct vnc_rectangle {
 175         unsigned short x, y, width, height;
 176         unsigned int encoding;
 177 };
 178
 179 void handle_vnc_fbupdate(int vnc_sock)
 180 {
 181         struct vnc_rectangle rect;
 182         unsigned char *data, *ptr;
 183         unsigned short num_rect;
 184         int ret, data_left, i;
 185
 186         if (read(vnc_sock, &num_rect, 2) != 2)
 187                 error("short read on num_rect\n");
 188
 189         for (i = 0; i < ntohs(num_rect); ++i) {
 190                 if (read(vnc_sock, &rect, sizeof(struct vnc_rectangle)) != sizeof(struct vnc_rectangle))
 191                         error("short read on vnc_rectangle\n");
 192
 193                 printf("UPDATE: %ux%u at (%u,%u)\n", ntohs(rect.width), ntohs(rect.height),
 194                         ntohs(rect.x), ntohs(rect.y));
 195
 196                 if (ntohl(rect.encoding) != 0)
 197                         error("unsupported encoding\n");
 198
 199                 ptr = data = xmalloc(ntohs(rect.width) * ntohs(rect.height) * 3);
 200                 data_left = ntohs(rect.width) * ntohs(rect.height) * 3;
 201
 202                 while (data_left > 0) {
 203                         ret = read(vnc_sock, ptr, data_left);
 204                         if (ret <= 0)
 205                                 error("error on data read\n");
 206
 207                         ptr += ret;
 208                         data_left -= ret;
 209                 }
 210
 211 //              rdp_send_bitmap_update(ntohs(rect.x), ntohs(rect.y), ntohs(rect.width), ntohs(rect.height), data);
 212                 xfree(data);
 213         }
 214 }
 215
 216 int serve_client()
 217 {
 218         int vnc_sock = vnc_init();
 219         int listen_on_vnc = 0;
 220
 221         if (!mcs_recv_connect_initial())
 222                 error("MCS_CONNECT_INITIAL recv failed");
 223         mcs_send_connect_response();
 224
 225         for ( ;; ) {
 226                 uint8 type, data_pdu_type;
 227                 STREAM s;
 228
 229                 fd_set readfs;
 230                 FD_ZERO(&readfs);
 231                 FD_SET(tcp_get_socket(), &readfs);
 232                 FD_SET(vnc_sock, &readfs);
 233
 234                 select(FD_SETSIZE, &readfs, NULL, NULL, NULL);
 235
 236                 // activity on RDP socket?
 237                 if (FD_ISSET(tcp_get_socket(), &readfs)) {
 238                         if ((s = rdp_recv(&type)) != NULL) {
 239                                 if (type != RDP_PDU_DATA) {
 240                                         printf("Unknown RDP packet of type %u\n", type);
 241                                         continue;
 242                                 }
 243
 244                                 in_uint8s(s, 8);        /* shareid, pad, streamid, length */
 245                                 in_uint8(s, data_pdu_type);
 246                                 in_uint8s(s, 3);        /* compress_type, compress_len */
 247
 248                                 switch (data_pdu_type) {
 249                                 case RDP_DATA_PDU_INPUT:
 250                                         printf("Input PDU\n");
 251                                         handle_input_pdu(s);
 252                                         listen_on_vnc = 1;
 253                                         break;
 254                                 default:
 255                                         printf("Unknown data PDU type %u\n", data_pdu_type);
 256                                 };
 257                         }
 258                 }
 259
 260                 // activity on VNC socket?
 261                 if (FD_ISSET(vnc_sock, &readfs) && listen_on_vnc) {
 262                         unsigned char buf[256];
 263
 264                         printf("Activity on VNC socket!\n");
 265
 266                         if (read(vnc_sock, buf, 2) != 2)
 267                                 error("short read on vnc_sock\n");
 268
 269                         switch (buf[0]) {
 270                         case 0:
 271                                 // frame buffer update!
 272                                 handle_vnc_fbupdate(vnc_sock);
 273                                 break;
 274                         default:
 275                                 printf("Unknown VNC server message %x\n", buf[0]);
 276 //                              exit(1);
 277                         }
 278                 }
 279         }
 280 }