src/sptps_test.c

   1 /*
   2     sptps_test.c -- Simple Peer-to-Peer Security test program
   3     Copyright (C) 2011-2013 Guus Sliepen <guus@tinc-vpn.org>,
   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 #include <getopt.h>
  23
  24 #include "crypto.h"
  25 #include "ecdsa.h"
  26 #include "sptps.h"
  27 #include "utils.h"
  28
  29 // Symbols necessary to link with logger.o
  30 bool send_request(void *c, const char *msg, ...) { return false; }
  31 struct list_t *connection_list = NULL;
  32 bool send_meta(void *c, const char *msg , int len) { return false; }
  33 char *logfilename = NULL;
  34 struct timeval now;
  35
  36 static bool verbose;
  37 static bool readonly;
  38 static bool writeonly;
  39
  40 static bool send_data(void *handle, uint8_t type, const char *data, size_t len) {
  41         char hex[len * 2 + 1];
  42         bin2hex(data, hex, len);
  43         if(verbose)
  44                 fprintf(stderr, "Sending %d bytes of data:\n%s\n", (int)len, hex);
  45         const int *sock = handle;
  46         if(send(*sock, data, len, 0) != len)
  47                 return false;
  48         return true;
  49 }
  50
  51 static bool receive_record(void *handle, uint8_t type, const char *data, uint16_t len) {
  52         if(verbose)
  53                 fprintf(stderr, "Received type %d record of %hu bytes:\n", type, len);
  54         if(!writeonly)
  55                 fwrite(data, len, 1, stdout);
  56         return true;
  57 }
  58
  59 static struct option const long_options[] = {
  60         {"datagram", no_argument, NULL, 'd'},
  61         {"quit", no_argument, NULL, 'q'},
  62         {"readonly", no_argument, NULL, 'r'},
  63         {"writeonly", no_argument, NULL, 'w'},
  64         {"packet-loss", required_argument, NULL, 'L'},
  65         {"replay-window", required_argument, NULL, 'W'},
  66         {"verbose", required_argument, NULL, 'v'},
  67         {"help", no_argument, NULL, 1},
  68         {NULL, 0, NULL, 0}
  69 };
  70
  71 const char *program_name;
  72
  73 static void usage() {
  74         fprintf(stderr, "Usage: %s [options] my_ecdsa_key_file his_ecdsa_key_file [host] port\n\n", program_name);
  75         fprintf(stderr, "Valid options are:\n"
  76                         "  -d, --datagram          Enable datagram mode.\n"
  77                         "  -q, --quit              Quit when EOF occurs on stdin.\n"
  78                         "  -r, --readonly          Only send data from the socket to stdout.\n"
  79                         "  -w, --writeonly         Only send data from stdin to the socket.\n"
  80                         "  -L, --packet-loss RATE  Fake packet loss of RATE percent.\n"
  81                         "  -R, --replay-window N   Set replay window to N bytes.\n"
  82                         "  -v, --verbose           Display debug messages.\n"
  83                         "\n");
  84         fprintf(stderr, "Report bugs to tinc@tinc-vpn.org.\n");
  85 }
  86
  87 int main(int argc, char *argv[]) {
  88         program_name = argv[0];
  89         bool initiator = false;
  90         bool datagram = false;
  91         int packetloss = 0;
  92         int r;
  93         int option_index = 0;
  94         ecdsa_t *mykey = NULL, *hiskey = NULL;
  95         bool quit = false;
  96
  97         while((r = getopt_long(argc, argv, "dqrwL:W:v", long_options, &option_index)) != EOF) {
  98                 switch (r) {
  99                         case 0:   /* long option */
 100                                 break;
 101
 102                         case 'd': /* datagram mode */
 103                                 datagram = true;
 104                                 break;
 105
 106                         case 'q': /* close connection on EOF from stdin */
 107                                 quit = true;
 108                                 break;
 109
 110                         case 'r': /* read only */
 111                                 readonly = true;
 112                                 break;
 113
 114                         case 'w': /* write only */
 115                                 writeonly = true;
 116                                 break;
 117
 118                         case 'L': /* packet loss rate */
 119                                 packetloss = atoi(optarg);
 120                                 break;
 121
 122                         case 'W': /* replay window size */
 123                                 sptps_replaywin = atoi(optarg);
 124                                 break;
 125
 126                         case 'v': /* be verbose */
 127                                 verbose = true;
 128                                 break;
 129
 130                         case '?': /* wrong options */
 131                                 usage();
 132                                 return 1;
 133
 134                         case 1: /* help */
 135                                 usage();
 136                                 return 0;
 137
 138                         default:
 139                                 break;
 140                 }
 141         }
 142
 143         argc -= optind - 1;
 144         argv += optind - 1;
 145
 146         if(argc < 4 || argc > 5) {
 147                 fprintf(stderr, "Wrong number of arguments.\n");
 148                 usage();
 149                 return 1;
 150         }
 151
 152         if(argc > 4)
 153                 initiator = true;
 154
 155         srand(time(NULL));
 156
 157 #ifdef HAVE_MINGW
 158         static struct WSAData wsa_state;
 159         if(WSAStartup(MAKEWORD(2, 2), &wsa_state))
 160                 return 1;
 161 #endif
 162
 163         struct addrinfo *ai, hint;
 164         memset(&hint, 0, sizeof hint);
 165
 166         hint.ai_family = AF_UNSPEC;
 167         hint.ai_socktype = datagram ? SOCK_DGRAM : SOCK_STREAM;
 168         hint.ai_protocol = datagram ? IPPROTO_UDP : IPPROTO_TCP;
 169         hint.ai_flags = initiator ? 0 : AI_PASSIVE;
 170
 171         if(getaddrinfo(initiator ? argv[3] : NULL, initiator ? argv[4] : argv[3], &hint, &ai) || !ai) {
 172                 fprintf(stderr, "getaddrinfo() failed: %s\n", strerror(errno));
 173                 return 1;
 174         }
 175
 176         int sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 177         if(sock < 0) {
 178                 fprintf(stderr, "Could not create socket: %s\n", strerror(errno));
 179                 return 1;
 180         }
 181
 182         int one = 1;
 183         setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof one);
 184
 185         if(initiator) {
 186                 if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
 187                         fprintf(stderr, "Could not connect to peer: %s\n", strerror(errno));
 188                         return 1;
 189                 }
 190                 fprintf(stderr, "Connected\n");
 191         } else {
 192                 if(bind(sock, ai->ai_addr, ai->ai_addrlen)) {
 193                         fprintf(stderr, "Could not bind socket: %s\n", strerror(errno));
 194                         return 1;
 195                 }
 196
 197                 if(!datagram) {
 198                         if(listen(sock, 1)) {
 199                                 fprintf(stderr, "Could not listen on socket: %s\n", strerror(errno));
 200                                 return 1;
 201                         }
 202                         fprintf(stderr, "Listening...\n");
 203
 204                         sock = accept(sock, NULL, NULL);
 205                         if(sock < 0) {
 206                                 fprintf(stderr, "Could not accept connection: %s\n", strerror(errno));
 207                                 return 1;
 208                         }
 209                 } else {
 210                         fprintf(stderr, "Listening...\n");
 211
 212                         char buf[65536];
 213                         struct sockaddr addr;
 214                         socklen_t addrlen = sizeof addr;
 215
 216                         if(recvfrom(sock, buf, sizeof buf, MSG_PEEK, &addr, &addrlen) <= 0) {
 217                                 fprintf(stderr, "Could not read from socket: %s\n", strerror(errno));
 218                                 return 1;
 219                         }
 220
 221                         if(connect(sock, &addr, addrlen)) {
 222                                 fprintf(stderr, "Could not accept connection: %s\n", strerror(errno));
 223                                 return 1;
 224                         }
 225                 }
 226
 227                 fprintf(stderr, "Connected\n");
 228         }
 229
 230         crypto_init();
 231
 232         FILE *fp = fopen(argv[1], "r");
 233         if(!(mykey = ecdsa_read_pem_private_key(fp)))
 234                 return 1;
 235         fclose(fp);
 236
 237         fp = fopen(argv[2], "r");
 238         if(!(hiskey = ecdsa_read_pem_public_key(fp)))
 239                 return 1;
 240         fclose(fp);
 241
 242         if(verbose)
 243                 fprintf(stderr, "Keys loaded\n");
 244
 245         sptps_t s;
 246         if(!sptps_start(&s, &sock, initiator, datagram, mykey, hiskey, "sptps_test", 10, send_data, receive_record))
 247                 return 1;
 248
 249         while(true) {
 250                 if(writeonly && readonly)
 251                         break;
 252
 253                 char buf[65535] = "";
 254
 255                 fd_set fds;
 256                 FD_ZERO(&fds);
 257 #ifndef HAVE_MINGW
 258                 if(!readonly && s.instate)
 259                         FD_SET(0, &fds);
 260 #endif
 261                 FD_SET(sock, &fds);
 262                 if(select(sock + 1, &fds, NULL, NULL, NULL) <= 0)
 263                         return 1;
 264
 265                 if(FD_ISSET(0, &fds)) {
 266                         ssize_t len = read(0, buf, sizeof buf);
 267                         if(len < 0) {
 268                                 fprintf(stderr, "Could not read from stdin: %s\n", strerror(errno));
 269                                 return 1;
 270                         }
 271                         if(len == 0) {
 272                                 if(quit)
 273                                         break;
 274                                 readonly = true;
 275                                 continue;
 276                         }
 277                         if(buf[0] == '#')
 278                                 s.outseqno = atoi(buf + 1);
 279                         if(buf[0] == '^')
 280                                 sptps_send_record(&s, SPTPS_HANDSHAKE, NULL, 0);
 281                         else if(buf[0] == '$') {
 282                                 sptps_force_kex(&s);
 283                                 if(len > 1)
 284                                         sptps_send_record(&s, 0, buf, len);
 285                         } else
 286                         if(!sptps_send_record(&s, buf[0] == '!' ? 1 : 0, buf, (len == 1 && buf[0] == '\n') ? 0 : buf[0] == '*' ? sizeof buf : len))
 287                                 return 1;
 288                 }
 289
 290                 if(FD_ISSET(sock, &fds)) {
 291                         ssize_t len = recv(sock, buf, sizeof buf, 0);
 292                         if(len < 0) {
 293                                 fprintf(stderr, "Could not read from socket: %s\n", strerror(errno));
 294                                 return 1;
 295                         }
 296                         if(len == 0) {
 297                                 fprintf(stderr, "Connection terminated by peer.\n");
 298                                 break;
 299                         }
 300                         if(verbose) {
 301                                 char hex[len * 2 + 1];
 302                                 bin2hex(buf, hex, len);
 303                                 fprintf(stderr, "Received %d bytes of data:\n%s\n", (int)len, hex);
 304                         }
 305                         if(packetloss && (rand() % 100) < packetloss) {
 306                                 if(verbose)
 307                                         fprintf(stderr, "Dropped.\n");
 308                                 continue;
 309                         }
 310                         if(!sptps_receive_data(&s, buf, len) && !datagram)
 311                                 return 1;
 312                 }
 313         }
 314
 315         if(!sptps_stop(&s))
 316                 return 1;
 317
 318         return 0;
 319 }