2 sptps_test.c -- Simple Peer-to-Peer Security test program
3 Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
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 <sys/ioctl.h>
25 #include <linux/if_tun.h>
35 // Symbols necessary to link with logger.o
36 bool send_request(void *c, const char *msg, ...) {
42 bool send_meta(void *c, const char *msg, int len) {
45 char *logfilename = NULL;
50 static bool writeonly;
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);
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)
65 static bool receive_record(void *handle, uint8_t type, const void *data, uint16_t len) {
67 fprintf(stderr, "Received type %d record of %hu bytes:\n", type, len);
69 write(out, data, len);
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},
85 const char *program_name;
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"
94 " -t, --tun Use a tun device instead of stdio.\n"
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"
101 fprintf(stderr, "Report bugs to bugs@meshlink.io.\n");
104 int main(int argc, char *argv[]) {
105 program_name = argv[0];
106 bool initiator = false;
107 bool datagram = false;
113 int option_index = 0;
114 ecdsa_t *mykey = NULL, *hiskey = NULL;
117 while((r = getopt_long(argc, argv, "dqrtwL:W:v", long_options, &option_index)) != EOF) {
119 case 0: /* long option */
122 case 'd': /* datagram mode */
126 case 'q': /* close connection on EOF from stdin */
130 case 'r': /* read only */
134 case 't': /* read only */
138 fprintf(stderr, "--tun is only supported on Linux.\n");
144 case 'w': /* write only */
148 case 'L': /* packet loss rate */
149 packetloss = atoi(optarg);
152 case 'W': /* replay window size */
153 sptps_replaywin = atoi(optarg);
156 case 'v': /* be verbose */
160 case '?': /* wrong options */
176 if(argc < 4 || argc > 5) {
177 fprintf(stderr, "Wrong number of arguments.\n");
189 in = out = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
191 fprintf(stderr, "Could not open tun device: %s\n", strerror(errno));
197 if(ioctl(in, TUNSETIFF, &ifr)) {
198 fprintf(stderr, "Could not configure tun interface: %s\n", strerror(errno));
201 ifr.ifr_name[IFNAMSIZ - 1] = 0;
202 fprintf(stderr, "Using tun interface %s\n", ifr.ifr_name);
207 static struct WSAData wsa_state;
208 if(WSAStartup(MAKEWORD(2, 2), &wsa_state))
212 struct addrinfo *ai, hint;
213 memset(&hint, 0, sizeof hint);
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;
220 if(getaddrinfo(initiator ? argv[3] : NULL, initiator ? argv[4] : argv[3], &hint, &ai) || !ai) {
221 fprintf(stderr, "getaddrinfo() failed: %s\n", strerror(errno));
225 int sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
227 fprintf(stderr, "Could not create socket: %s\n", strerror(errno));
232 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof one);
235 if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
236 fprintf(stderr, "Could not connect to peer: %s\n", strerror(errno));
239 fprintf(stderr, "Connected\n");
241 if(bind(sock, ai->ai_addr, ai->ai_addrlen)) {
242 fprintf(stderr, "Could not bind socket: %s\n", strerror(errno));
247 if(listen(sock, 1)) {
248 fprintf(stderr, "Could not listen on socket: %s\n", strerror(errno));
251 fprintf(stderr, "Listening...\n");
253 sock = accept(sock, NULL, NULL);
255 fprintf(stderr, "Could not accept connection: %s\n", strerror(errno));
259 fprintf(stderr, "Listening...\n");
262 struct sockaddr addr;
263 socklen_t addrlen = sizeof addr;
265 if(recvfrom(sock, buf, sizeof buf, MSG_PEEK, &addr, &addrlen) <= 0) {
266 fprintf(stderr, "Could not read from socket: %s\n", strerror(errno));
270 if(connect(sock, &addr, addrlen)) {
271 fprintf(stderr, "Could not accept connection: %s\n", strerror(errno));
276 fprintf(stderr, "Connected\n");
281 FILE *fp = fopen(argv[1], "r");
282 if(!(mykey = ecdsa_read_pem_private_key(fp)))
286 fp = fopen(argv[2], "r");
287 if(!(hiskey = ecdsa_read_pem_public_key(fp)))
292 fprintf(stderr, "Keys loaded\n");
295 if(!sptps_start(&s, &sock, initiator, datagram, mykey, hiskey, "sptps_test", 10, send_data, receive_record))
299 if(writeonly && readonly)
302 char buf[65535] = "";
307 if(!readonly && s.instate)
311 if(select(sock + 1, &fds, NULL, NULL, NULL) <= 0)
314 if(FD_ISSET(in, &fds)) {
315 ssize_t len = read(in, buf, sizeof buf);
317 fprintf(stderr, "Could not read from stdin: %s\n", strerror(errno));
327 s.outseqno = atoi(buf + 1);
329 sptps_send_record(&s, SPTPS_HANDSHAKE, NULL, 0);
330 else if(buf[0] == '$') {
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))
338 if(FD_ISSET(sock, &fds)) {
339 ssize_t len = recv(sock, buf, sizeof buf, 0);
341 fprintf(stderr, "Could not read from socket: %s\n", strerror(errno));
345 fprintf(stderr, "Connection terminated by peer.\n");
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);
353 if(packetloss && (rand() % 100) < packetloss) {
355 fprintf(stderr, "Dropped.\n");
358 if(!sptps_receive_data(&s, buf, len) && !datagram)