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, ...) {
  37         return false;
  38 }
  39 void *mesh;
  40 void *global_log_cb;
  41 int global_log_level;
  42 bool send_meta(void *c, const char *msg, int len) {
  43         return false;
  44 }
  45 char *logfilename = NULL;
  46 struct timeval now;
  47
  48 static bool verbose;
  49 static bool readonly;
  50 static bool writeonly;
  51 static int in = 0;
  52 static int out = 1;
  53
  54 static bool send_data(void *handle, uint8_t type, const void *data, size_t len) {
  55         char hex[len * 2 + 1];
  56         bin2hex(data, hex, len);
  57         if(verbose)
  58                 fprintf(stderr, "Sending %d bytes of data:\n%s\n", (int)len, hex);
  59         const int *sock = handle;
  60         if(send(*sock, data, len, 0) != len)
  61                 return false;
  62         return true;
  63 }
  64
  65 static bool receive_record(void *handle, uint8_t type, const void *data, uint16_t len) {
  66         if(verbose)
  67                 fprintf(stderr, "Received type %d record of %hu bytes:\n", type, len);
  68         if(!writeonly)
  69                 write(out, data, len);
  70         return true;
  71 }
  72
  73 static struct option const long_options[] = {
  74         {"datagram", no_argument, NULL, 'd'},
  75         {"quit", no_argument, NULL, 'q'},
  76         {"readonly", no_argument, NULL, 'r'},
  77         {"writeonly", no_argument, NULL, 'w'},
  78         {"packet-loss", required_argument, NULL, 'L'},
  79         {"replay-window", required_argument, NULL, 'W'},
  80         {"verbose", required_argument, NULL, 'v'},
  81         {"help", no_argument, NULL, 1},
  82         {NULL, 0, NULL, 0}
  83 };
  84
  85 const char *program_name;
  86
  87 static void usage() {
  88         fprintf(stderr, "Usage: %s [options] my_ecdsa_key_file his_ecdsa_key_file [host] port\n\n", program_name);
  89         fprintf(stderr, "Valid options are:\n"
  90                 "  -d, --datagram          Enable datagram mode.\n"
  91                 "  -q, --quit              Quit when EOF occurs on stdin.\n"
  92                 "  -r, --readonly          Only send data from the socket to stdout.\n"
  93 #ifdef HAVE_LINUX
  94                 "  -t, --tun               Use a tun device instead of stdio.\n"
  95 #endif
  96                 "  -w, --writeonly         Only send data from stdin to the socket.\n"
  97                 "  -L, --packet-loss RATE  Fake packet loss of RATE percent.\n"
  98                 "  -R, --replay-window N   Set replay window to N bytes.\n"
  99                 "  -v, --verbose           Display debug messages.\n"
 100                 "\n");
 101         fprintf(stderr, "Report bugs to bugs@meshlink.io.\n");
 102 }
 103
 104 int main(int argc, char *argv[]) {
 105         program_name = argv[0];
 106         bool initiator = false;
 107         bool datagram = false;
 108 #ifdef HAVE_LINUX
 109         bool tun = false;
 110 #endif
 111         int packetloss = 0;
 112         int r;
 113         int option_index = 0;
 114         ecdsa_t *mykey = NULL, *hiskey = NULL;
 115         bool quit = false;
 116
 117         while((r = getopt_long(argc, argv, "dqrtwL:W:v", long_options, &option_index)) != EOF) {
 118                 switch(r) {
 119                 case 0:   /* long option */
 120                         break;
 121
 122                 case 'd': /* datagram mode */
 123                         datagram = true;
 124                         break;
 125
 126                 case 'q': /* close connection on EOF from stdin */
 127                         quit = true;
 128                         break;
 129
 130                 case 'r': /* read only */
 131                         readonly = true;
 132                         break;
 133
 134                 case 't': /* read only */
 135 #ifdef HAVE_LINUX
 136                         tun = true;
 137 #else
 138                         fprintf(stderr, "--tun is only supported on Linux.\n");
 139                         usage();
 140                         return 1;
 141 #endif
 142                         break;
 143
 144                 case 'w': /* write only */
 145                         writeonly = true;
 146                         break;
 147
 148                 case 'L': /* packet loss rate */
 149                         packetloss = atoi(optarg);
 150                         break;
 151
 152                 case 'W': /* replay window size */
 153                         sptps_replaywin = atoi(optarg);
 154                         break;
 155
 156                 case 'v': /* be verbose */
 157                         verbose = true;
 158                         break;
 159
 160                 case '?': /* wrong options */
 161                         usage();
 162                         return 1;
 163
 164                 case 1: /* help */
 165                         usage();
 166                         return 0;
 167
 168                 default:
 169                         break;
 170                 }
 171         }
 172
 173         argc -= optind - 1;
 174         argv += optind - 1;
 175
 176         if(argc < 4 || argc > 5) {
 177                 fprintf(stderr, "Wrong number of arguments.\n");
 178                 usage();
 179                 return 1;
 180         }
 181
 182         if(argc > 4)
 183                 initiator = true;
 184
 185         srand(time(NULL));
 186
 187 #ifdef HAVE_LINUX
 188         if(tun) {
 189                 in = out = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
 190                 if(in < 0) {
 191                         fprintf(stderr, "Could not open tun device: %s\n", strerror(errno));
 192                         return 1;
 193                 }
 194                 struct ifreq ifr = {
 195                         .ifr_flags = IFF_TUN
 196                 };
 197                 if(ioctl(in, TUNSETIFF, &ifr)) {
 198                         fprintf(stderr, "Could not configure tun interface: %s\n", strerror(errno));
 199                         return 1;
 200                 }
 201                 ifr.ifr_name[IFNAMSIZ - 1] = 0;
 202                 fprintf(stderr, "Using tun interface %s\n", ifr.ifr_name);
 203         }
 204 #endif
 205
 206 #ifdef HAVE_MINGW
 207         static struct WSAData wsa_state;
 208         if(WSAStartup(MAKEWORD(2, 2), &wsa_state))
 209                 return 1;
 210 #endif
 211
 212         struct addrinfo *ai, hint;
 213         memset(&hint, 0, sizeof(hint));
 214
 215         hint.ai_family = AF_UNSPEC;
 216         hint.ai_socktype = datagram ? SOCK_DGRAM : SOCK_STREAM;
 217         hint.ai_protocol = datagram ? IPPROTO_UDP : IPPROTO_TCP;
 218         hint.ai_flags = initiator ? 0 : AI_PASSIVE;
 219
 220         if(getaddrinfo(initiator ? argv[3] : NULL, initiator ? argv[4] : argv[3], &hint, &ai) || !ai) {
 221                 fprintf(stderr, "getaddrinfo() failed: %s\n", strerror(errno));
 222                 return 1;
 223         }
 224
 225         int sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 226         if(sock < 0) {
 227                 fprintf(stderr, "Could not create socket: %s\n", strerror(errno));
 228                 return 1;
 229         }
 230
 231         int one = 1;
 232         setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(one));
 233
 234         if(initiator) {
 235                 if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
 236                         fprintf(stderr, "Could not connect to peer: %s\n", strerror(errno));
 237                         return 1;
 238                 }
 239                 fprintf(stderr, "Connected\n");
 240         } else {
 241                 if(bind(sock, ai->ai_addr, ai->ai_addrlen)) {
 242                         fprintf(stderr, "Could not bind socket: %s\n", strerror(errno));
 243                         return 1;
 244                 }
 245
 246                 if(!datagram) {
 247                         if(listen(sock, 1)) {
 248                                 fprintf(stderr, "Could not listen on socket: %s\n", strerror(errno));
 249                                 return 1;
 250                         }
 251                         fprintf(stderr, "Listening...\n");
 252
 253                         sock = accept(sock, NULL, NULL);
 254                         if(sock < 0) {
 255                                 fprintf(stderr, "Could not accept connection: %s\n", strerror(errno));
 256                                 return 1;
 257                         }
 258                 } else {
 259                         fprintf(stderr, "Listening...\n");
 260
 261                         char buf[65536];
 262                         struct sockaddr addr;
 263                         socklen_t addrlen = sizeof(addr);
 264
 265                         if(recvfrom(sock, buf, sizeof(buf), MSG_PEEK, &addr, &addrlen) <= 0) {
 266                                 fprintf(stderr, "Could not read from socket: %s\n", strerror(errno));
 267                                 return 1;
 268                         }
 269
 270                         if(connect(sock, &addr, addrlen)) {
 271                                 fprintf(stderr, "Could not accept connection: %s\n", strerror(errno));
 272                                 return 1;
 273                         }
 274                 }
 275
 276                 fprintf(stderr, "Connected\n");
 277         }
 278
 279         crypto_init();
 280
 281         FILE *fp = fopen(argv[1], "r");
 282         if(!(mykey = ecdsa_read_pem_private_key(fp)))
 283                 return 1;
 284         fclose(fp);
 285
 286         fp = fopen(argv[2], "r");
 287         if(!(hiskey = ecdsa_read_pem_public_key(fp)))
 288                 return 1;
 289         fclose(fp);
 290
 291         if(verbose)
 292                 fprintf(stderr, "Keys loaded\n");
 293
 294         sptps_t s;
 295         if(!sptps_start(&s, &sock, initiator, datagram, mykey, hiskey, "sptps_test", 10, send_data, receive_record))
 296                 return 1;
 297
 298         while(true) {
 299                 if(writeonly && readonly)
 300                         break;
 301
 302                 char buf[65535] = "";
 303
 304                 fd_set fds;
 305                 FD_ZERO(&fds);
 306 #ifndef HAVE_MINGW
 307                 if(!readonly && s.instate)
 308                         FD_SET(in, &fds);
 309 #endif
 310                 FD_SET(sock, &fds);
 311                 if(select(sock + 1, &fds, NULL, NULL, NULL) <= 0)
 312                         return 1;
 313
 314                 if(FD_ISSET(in, &fds)) {
 315                         ssize_t len = read(in, buf, sizeof(buf));
 316                         if(len < 0) {
 317                                 fprintf(stderr, "Could not read from stdin: %s\n", strerror(errno));
 318                                 return 1;
 319                         }
 320                         if(len == 0) {
 321                                 if(quit)
 322                                         break;
 323                                 readonly = true;
 324                                 continue;
 325                         }
 326                         if(buf[0] == '#')
 327                                 s.outseqno = atoi(buf + 1);
 328                         if(buf[0] == '^')
 329                                 sptps_send_record(&s, SPTPS_HANDSHAKE, NULL, 0);
 330                         else if(buf[0] == '$') {
 331                                 sptps_force_kex(&s);
 332                                 if(len > 1)
 333                                         sptps_send_record(&s, 0, buf, len);
 334                         } else if(!sptps_send_record(&s, buf[0] == '!' ? 1 : 0, buf, (len == 1 && buf[0] == '\n') ? 0 : buf[0] == '*' ? sizeof(buf) : len))
 335                                 return 1;
 336                 }
 337
 338                 if(FD_ISSET(sock, &fds)) {
 339                         ssize_t len = recv(sock, buf, sizeof(buf), 0);
 340                         if(len < 0) {
 341                                 fprintf(stderr, "Could not read from socket: %s\n", strerror(errno));
 342                                 return 1;
 343                         }
 344                         if(len == 0) {
 345                                 fprintf(stderr, "Connection terminated by peer.\n");
 346                                 break;
 347                         }
 348                         if(verbose) {
 349                                 char hex[len * 2 + 1];
 350                                 bin2hex(buf, hex, len);
 351                                 fprintf(stderr, "Received %d bytes of data:\n%s\n", (int)len, hex);
 352                         }
 353                         if(packetloss && (rand() % 100) < packetloss) {
 354                                 if(verbose)
 355                                         fprintf(stderr, "Dropped.\n");
 356                                 continue;
 357                         }
 358                         if(!sptps_receive_data(&s, buf, len) && !datagram)
 359                                 return 1;
 360                 }
 361         }
 362
 363         if(!sptps_stop(&s))
 364                 return 1;
 365
 366         return 0;
 367 }