2 sptps_test.c -- Simple Peer-to-Peer Security test program
3 Copyright (C) 2011-2014 Guus Sliepen <guus@tinc-vpn.org>
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.
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.
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.
23 #include <linux/if_tun.h>
33 // Symbols necessary to link with logger.o
34 bool send_request(void *c, const char *msg, ...) {
37 struct list_t *connection_list = NULL;
38 bool send_meta(void *c, const char *msg, int len) {
41 char *logfilename = NULL;
42 bool do_detach = false;
48 static bool writeonly;
51 static int addressfamily = AF_UNSPEC;
53 static bool send_data(void *handle, uint8_t type, const void *data, size_t len) {
54 char hex[len * 2 + 1];
55 bin2hex(data, hex, len);
58 fprintf(stderr, "Sending %d bytes of data:\n%s\n", (int)len, hex);
61 const int *sock = handle;
63 if(send(*sock, data, len, 0) != len) {
70 static bool receive_record(void *handle, uint8_t type, const void *data, uint16_t len) {
72 fprintf(stderr, "Received type %d record of %u bytes:\n", type, len);
76 write(out, data, len);
82 static struct option const long_options[] = {
83 {"datagram", no_argument, NULL, 'd'},
84 {"quit", no_argument, NULL, 'q'},
85 {"readonly", no_argument, NULL, 'r'},
86 {"writeonly", no_argument, NULL, 'w'},
87 {"packet-loss", required_argument, NULL, 'L'},
88 {"replay-window", required_argument, NULL, 'W'},
89 {"special", no_argument, NULL, 's'},
90 {"verbose", required_argument, NULL, 'v'},
91 {"help", no_argument, NULL, 1},
95 const char *program_name;
98 fprintf(stderr, "Usage: %s [options] my_ed25519_key_file his_ed25519_key_file [host] port\n\n", program_name);
99 fprintf(stderr, "Valid options are:\n"
100 " -d, --datagram Enable datagram mode.\n"
101 " -q, --quit Quit when EOF occurs on stdin.\n"
102 " -r, --readonly Only send data from the socket to stdout.\n"
104 " -t, --tun Use a tun device instead of stdio.\n"
106 " -w, --writeonly Only send data from stdin to the socket.\n"
107 " -L, --packet-loss RATE Fake packet loss of RATE percent.\n"
108 " -R, --replay-window N Set replay window to N bytes.\n"
109 " -s, --special Enable special handling of lines starting with #, ^ and $.\n"
110 " -v, --verbose Display debug messages.\n"
114 fprintf(stderr, "Report bugs to tinc@tinc-vpn.org.\n");
117 int main(int argc, char *argv[]) {
118 program_name = argv[0];
119 bool initiator = false;
120 bool datagram = false;
126 int option_index = 0;
127 ecdsa_t *mykey = NULL, *hiskey = NULL;
130 while((r = getopt_long(argc, argv, "dqrstwL:W:v46", long_options, &option_index)) != EOF) {
132 case 0: /* long option */
135 case 'd': /* datagram mode */
139 case 'q': /* close connection on EOF from stdin */
143 case 'r': /* read only */
147 case 't': /* read only */
151 fprintf(stderr, "--tun is only supported on Linux.\n");
157 case 'w': /* write only */
161 case 'L': /* packet loss rate */
162 packetloss = atoi(optarg);
165 case 'W': /* replay window size */
166 sptps_replaywin = atoi(optarg);
169 case 'v': /* be verbose */
173 case 's': /* special character handling */
177 case '?': /* wrong options */
182 addressfamily = AF_INET;
186 addressfamily = AF_INET6;
201 if(argc < 4 || argc > 5) {
202 fprintf(stderr, "Wrong number of arguments.\n");
216 in = out = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
219 fprintf(stderr, "Could not open tun device: %s\n", strerror(errno));
227 if(ioctl(in, TUNSETIFF, &ifr)) {
228 fprintf(stderr, "Could not configure tun interface: %s\n", strerror(errno));
232 ifr.ifr_name[IFNAMSIZ - 1] = 0;
233 fprintf(stderr, "Using tun interface %s\n", ifr.ifr_name);
239 static struct WSAData wsa_state;
241 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
247 struct addrinfo *ai, hint;
248 memset(&hint, 0, sizeof(hint));
250 hint.ai_family = addressfamily;
251 hint.ai_socktype = datagram ? SOCK_DGRAM : SOCK_STREAM;
252 hint.ai_protocol = datagram ? IPPROTO_UDP : IPPROTO_TCP;
253 hint.ai_flags = initiator ? 0 : AI_PASSIVE;
255 if(getaddrinfo(initiator ? argv[3] : NULL, initiator ? argv[4] : argv[3], &hint, &ai) || !ai) {
256 fprintf(stderr, "getaddrinfo() failed: %s\n", sockstrerror(sockerrno));
260 int sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
263 fprintf(stderr, "Could not create socket: %s\n", sockstrerror(sockerrno));
268 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(one));
271 if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
272 fprintf(stderr, "Could not connect to peer: %s\n", sockstrerror(sockerrno));
276 fprintf(stderr, "Connected\n");
278 if(bind(sock, ai->ai_addr, ai->ai_addrlen)) {
279 fprintf(stderr, "Could not bind socket: %s\n", sockstrerror(sockerrno));
284 if(listen(sock, 1)) {
285 fprintf(stderr, "Could not listen on socket: %s\n", sockstrerror(sockerrno));
289 fprintf(stderr, "Listening...\n");
291 sock = accept(sock, NULL, NULL);
294 fprintf(stderr, "Could not accept connection: %s\n", sockstrerror(sockerrno));
298 fprintf(stderr, "Listening...\n");
301 struct sockaddr addr;
302 socklen_t addrlen = sizeof(addr);
304 if(recvfrom(sock, buf, sizeof(buf), MSG_PEEK, &addr, &addrlen) <= 0) {
305 fprintf(stderr, "Could not read from socket: %s\n", sockstrerror(sockerrno));
309 if(connect(sock, &addr, addrlen)) {
310 fprintf(stderr, "Could not accept connection: %s\n", sockstrerror(sockerrno));
315 fprintf(stderr, "Connected\n");
320 FILE *fp = fopen(argv[1], "r");
323 fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno));
327 if(!(mykey = ecdsa_read_pem_private_key(fp))) {
333 fp = fopen(argv[2], "r");
336 fprintf(stderr, "Could not open %s: %s\n", argv[2], strerror(errno));
340 if(!(hiskey = ecdsa_read_pem_public_key(fp))) {
347 fprintf(stderr, "Keys loaded\n");
352 if(!sptps_start(&s, &sock, initiator, datagram, mykey, hiskey, "sptps_test", 10, send_data, receive_record)) {
357 if(writeonly && readonly) {
361 char buf[65535] = "";
367 if(!readonly && s.instate) {
374 if(select(sock + 1, &fds, NULL, NULL, NULL) <= 0) {
378 if(FD_ISSET(in, &fds)) {
379 ssize_t len = read(in, buf, sizeof(buf));
382 fprintf(stderr, "Could not read from stdin: %s\n", strerror(errno));
395 if(special && buf[0] == '#') {
396 s.outseqno = atoi(buf + 1);
399 if(special && buf[0] == '^') {
400 sptps_send_record(&s, SPTPS_HANDSHAKE, NULL, 0);
401 } else if(special && buf[0] == '$') {
405 sptps_send_record(&s, 0, buf, len);
407 } else if(!sptps_send_record(&s, buf[0] == '!' ? 1 : 0, buf, (len == 1 && buf[0] == '\n') ? 0 : buf[0] == '*' ? sizeof(buf) : len)) {
412 if(FD_ISSET(sock, &fds)) {
413 ssize_t len = recv(sock, buf, sizeof(buf), 0);
416 fprintf(stderr, "Could not read from socket: %s\n", sockstrerror(sockerrno));
421 fprintf(stderr, "Connection terminated by peer.\n");
426 char hex[len * 2 + 1];
427 bin2hex(buf, hex, len);
428 fprintf(stderr, "Received %d bytes of data:\n%s\n", (int)len, hex);
431 if(packetloss && (rand() % 100) < packetloss) {
433 fprintf(stderr, "Dropped.\n");
442 size_t done = sptps_receive_data(&s, bufp, len);
458 if(!sptps_stop(&s)) {