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