git.meshlink.io Git - meshlink/blob - src/sptps_test.c

   1 /*
   2     sptps_test.c -- Simple Peer-to-Peer Security test program
   3     Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License along
  16     with this program; if not, write to the Free Software Foundation, Inc.,
  17     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "system.h"
  21
  22 #ifdef HAVE_LINUX
  23 #include <sys/ioctl.h>
  24 #include <linux/if.h>
  25 #include <linux/if_tun.h>
  26 #endif
  27
  28 #include <getopt.h>
  29
  30 #include "crypto.h"
  31 #include "ecdsa.h"
  32 #include "sptps.h"
  33 #include "utils.h"
  34
  35 // Symbols necessary to link with logger.o
  36 bool send_request(void *c, const char *msg, ...) { return false; }
  37 void *mesh;
  38 void *global_log_cb;
  39 int global_log_level;
  40 bool send_meta(void *c, const char *msg , int len) { return false; }
  41 char *logfilename = NULL;
  42 struct timeval now;
  43
  44 static bool verbose;
  45 static bool readonly;
  46 static bool writeonly;
  47 static int in = 0;
  48 static int out = 1;
  49
  50 static bool send_data(void *handle, uint8_t type, const void *data, size_t len) {
  51         char hex[len * 2 + 1];
  52         bin2hex(data, hex, len);
  53         if(verbose)
  54                 fprintf(stderr, "Sending %d bytes of data:\n%s\n", (int)len, hex);
  55         const int *sock = handle;
  56         if(send(*sock, data, len, 0) != len)
  57                 return false;
  58         return true;
  59 }
  60
  61 static bool receive_record(void *handle, uint8_t type, const void *data, uint16_t len) {
  62         if(verbose)
  63                 fprintf(stderr, "Received type %d record of %hu bytes:\n", type, len);
  64         if(!writeonly)
  65                 write(out, data, len);
  66         return true;
  67 }
  68
  69 static struct option const long_options[] = {
  70         {"datagram", no_argument, NULL, 'd'},
  71         {"quit", no_argument, NULL, 'q'},
  72         {"readonly", no_argument, NULL, 'r'},
  73         {"writeonly", no_argument, NULL, 'w'},
  74         {"packet-loss", required_argument, NULL, 'L'},
  75         {"replay-window", required_argument, NULL, 'W'},
  76         {"verbose", required_argument, NULL, 'v'},
  77         {"help", no_argument, NULL, 1},
  78         {NULL, 0, NULL, 0}
  79 };
  80
  81 const char *program_name;
  82
  83 static void usage() {
  84         fprintf(stderr, "Usage: %s [options] my_ecdsa_key_file his_ecdsa_key_file [host] port\n\n", program_name);
  85         fprintf(stderr, "Valid options are:\n"
  86                         "  -d, --datagram          Enable datagram mode.\n"
  87                         "  -q, --quit              Quit when EOF occurs on stdin.\n"
  88                         "  -r, --readonly          Only send data from the socket to stdout.\n"
  89 #ifdef HAVE_LINUX
  90                         "  -t, --tun               Use a tun device instead of stdio.\n"
  91 #endif
  92                         "  -w, --writeonly         Only send data from stdin to the socket.\n"
  93                         "  -L, --packet-loss RATE  Fake packet loss of RATE percent.\n"
  94                         "  -R, --replay-window N   Set replay window to N bytes.\n"
  95                         "  -v, --verbose           Display debug messages.\n"
  96                         "\n");
  97         fprintf(stderr, "Report bugs to bugs@meshlink.io.\n");
  98 }
  99
 100 int main(int argc, char *argv[]) {
 101         program_name = argv[0];
 102         bool initiator = false;
 103         bool datagram = false;
 104 #ifdef HAVE_LINUX
 105         bool tun = false;
 106 #endif
 107         int packetloss = 0;
 108         int r;
 109         int option_index = 0;
 110         ecdsa_t *mykey = NULL, *hiskey = NULL;
 111         bool quit = false;
 112
 113         while((r = getopt_long(argc, argv, "dqrtwL:W:v", long_options, &option_index)) != EOF) {
 114                 switch (r) {
 115                         case 0:   /* long option */
 116                                 break;
 117
 118                         case 'd': /* datagram mode */
 119                                 datagram = true;
 120                                 break;
 121
 122                         case 'q': /* close connection on EOF from stdin */
 123                                 quit = true;
 124                                 break;
 125
 126                         case 'r': /* read only */
 127                                 readonly = true;
 128                                 break;
 129
 130                         case 't': /* read only */
 131 #ifdef HAVE_LINUX
 132                                 tun = true;
 133 #else
 134                                 fprintf(stderr, "--tun is only supported on Linux.\n");
 135                                 usage();
 136                                 return 1;
 137 #endif
 138                                 break;
 139
 140                         case 'w': /* write only */
 141                                 writeonly = true;
 142                                 break;
 143
 144                         case 'L': /* packet loss rate */
 145                                 packetloss = atoi(optarg);
 146                                 break;
 147
 148                         case 'W': /* replay window size */
 149                                 sptps_replaywin = atoi(optarg);
 150                                 break;
 151
 152                         case 'v': /* be verbose */
 153                                 verbose = true;
 154                                 break;
 155
 156                         case '?': /* wrong options */
 157                                 usage();
 158                                 return 1;
 159
 160                         case 1: /* help */
 161                                 usage();
 162                                 return 0;
 163
 164                         default:
 165                                 break;
 166                 }
 167         }
 168
 169         argc -= optind - 1;
 170         argv += optind - 1;
 171
 172         if(argc < 4 || argc > 5) {
 173                 fprintf(stderr, "Wrong number of arguments.\n");
 174                 usage();
 175                 return 1;
 176         }
 177
 178         if(argc > 4)
 179                 initiator = true;
 180
 181         srand(time(NULL));
 182
 183 #ifdef HAVE_LINUX
 184         if(tun) {
 185                 in = out = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
 186                 if(in < 0) {
 187                         fprintf(stderr, "Could not open tun device: %s\n", strerror(errno));
 188                         return 1;
 189                 }
 190                 struct ifreq ifr = {
 191                         .ifr_flags = IFF_TUN
 192                 };
 193                 if(ioctl(in, TUNSETIFF, &ifr)) {
 194                         fprintf(stderr, "Could not configure tun interface: %s\n", strerror(errno));
 195                         return 1;
 196                 }
 197                 ifr.ifr_name[IFNAMSIZ - 1] = 0;
 198                 fprintf(stderr, "Using tun interface %s\n", ifr.ifr_name);
 199         }
 200 #endif
 201
 202 #ifdef HAVE_MINGW
 203         static struct WSAData wsa_state;
 204         if(WSAStartup(MAKEWORD(2, 2), &wsa_state))
 205                 return 1;
 206 #endif
 207
 208         struct addrinfo *ai, hint;
 209         memset(&hint, 0, sizeof hint);
 210
 211         hint.ai_family = AF_UNSPEC;
 212         hint.ai_socktype = datagram ? SOCK_DGRAM : SOCK_STREAM;
 213         hint.ai_protocol = datagram ? IPPROTO_UDP : IPPROTO_TCP;
 214         hint.ai_flags = initiator ? 0 : AI_PASSIVE;
 215
 216         if(getaddrinfo(initiator ? argv[3] : NULL, initiator ? argv[4] : argv[3], &hint, &ai) || !ai) {
 217                 fprintf(stderr, "getaddrinfo() failed: %s\n", strerror(errno));
 218                 return 1;
 219         }
 220
 221         int sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 222         if(sock < 0) {
 223                 fprintf(stderr, "Could not create socket: %s\n", strerror(errno));
 224                 return 1;
 225         }
 226
 227         int one = 1;
 228         setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof one);
 229
 230         if(initiator) {
 231                 if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
 232                         fprintf(stderr, "Could not connect to peer: %s\n", strerror(errno));
 233                         return 1;
 234                 }
 235                 fprintf(stderr, "Connected\n");
 236         } else {
 237                 if(bind(sock, ai->ai_addr, ai->ai_addrlen)) {
 238                         fprintf(stderr, "Could not bind socket: %s\n", strerror(errno));
 239                         return 1;
 240                 }
 241
 242                 if(!datagram) {
 243                         if(listen(sock, 1)) {
 244                                 fprintf(stderr, "Could not listen on socket: %s\n", strerror(errno));
 245                                 return 1;
 246                         }
 247                         fprintf(stderr, "Listening...\n");
 248
 249                         sock = accept(sock, NULL, NULL);
 250                         if(sock < 0) {
 251                                 fprintf(stderr, "Could not accept connection: %s\n", strerror(errno));
 252                                 return 1;
 253                         }
 254                 } else {
 255                         fprintf(stderr, "Listening...\n");
 256
 257                         char buf[65536];
 258                         struct sockaddr addr;
 259                         socklen_t addrlen = sizeof addr;
 260
 261                         if(recvfrom(sock, buf, sizeof buf, MSG_PEEK, &addr, &addrlen) <= 0) {
 262                                 fprintf(stderr, "Could not read from socket: %s\n", strerror(errno));
 263                                 return 1;
 264                         }
 265
 266                         if(connect(sock, &addr, addrlen)) {
 267                                 fprintf(stderr, "Could not accept connection: %s\n", strerror(errno));
 268                                 return 1;
 269                         }
 270                 }
 271
 272                 fprintf(stderr, "Connected\n");
 273         }
 274
 275         crypto_init();
 276
 277         FILE *fp = fopen(argv[1], "r");
 278         if(!(mykey = ecdsa_read_pem_private_key(fp)))
 279                 return 1;
 280         fclose(fp);
 281
 282         fp = fopen(argv[2], "r");
 283         if(!(hiskey = ecdsa_read_pem_public_key(fp)))
 284                 return 1;
 285         fclose(fp);
 286
 287         if(verbose)
 288                 fprintf(stderr, "Keys loaded\n");
 289
 290         sptps_t s;
 291         if(!sptps_start(&s, &sock, initiator, datagram, mykey, hiskey, "sptps_test", 10, send_data, receive_record))
 292                 return 1;
 293
 294         while(true) {
 295                 if(writeonly && readonly)
 296                         break;
 297
 298                 char buf[65535] = "";
 299
 300                 fd_set fds;
 301                 FD_ZERO(&fds);
 302 #ifndef HAVE_MINGW
 303                 if(!readonly && s.instate)
 304                         FD_SET(in, &fds);
 305 #endif
 306                 FD_SET(sock, &fds);
 307                 if(select(sock + 1, &fds, NULL, NULL, NULL) <= 0)
 308                         return 1;
 309
 310                 if(FD_ISSET(in, &fds)) {
 311                         ssize_t len = read(in, buf, sizeof buf);
 312                         if(len < 0) {
 313                                 fprintf(stderr, "Could not read from stdin: %s\n", strerror(errno));
 314                                 return 1;
 315                         }
 316                         if(len == 0) {
 317                                 if(quit)
 318                                         break;
 319                                 readonly = true;
 320                                 continue;
 321                         }
 322                         if(buf[0] == '#')
 323                                 s.outseqno = atoi(buf + 1);
 324                         if(buf[0] == '^')
 325                                 sptps_send_record(&s, SPTPS_HANDSHAKE, NULL, 0);
 326                         else if(buf[0] == '$') {
 327                                 sptps_force_kex(&s);
 328                                 if(len > 1)
 329                                         sptps_send_record(&s, 0, buf, len);
 330                         } else
 331                         if(!sptps_send_record(&s, buf[0] == '!' ? 1 : 0, buf, (len == 1 && buf[0] == '\n') ? 0 : buf[0] == '*' ? sizeof buf : len))
 332                                 return 1;
 333                 }
 334
 335                 if(FD_ISSET(sock, &fds)) {
 336                         ssize_t len = recv(sock, buf, sizeof buf, 0);
 337                         if(len < 0) {
 338                                 fprintf(stderr, "Could not read from socket: %s\n", strerror(errno));
 339                                 return 1;
 340                         }
 341                         if(len == 0) {
 342                                 fprintf(stderr, "Connection terminated by peer.\n");
 343                                 break;
 344                         }
 345                         if(verbose) {
 346                                 char hex[len * 2 + 1];
 347                                 bin2hex(buf, hex, len);
 348                                 fprintf(stderr, "Received %d bytes of data:\n%s\n", (int)len, hex);
 349                         }
 350                         if(packetloss && (rand() % 100) < packetloss) {
 351                                 if(verbose)
 352                                         fprintf(stderr, "Dropped.\n");
 353                                 continue;
 354                         }
 355                         if(!sptps_receive_data(&s, buf, len) && !datagram)
 356                                 return 1;
 357                 }
 358         }
 359
 360         if(!sptps_stop(&s))
 361                 return 1;
 362
 363         return 0;
 364 }