Add an option to test datagram SPTPS with packet loss.

diff --git a/src/sptps_test.c b/src/sptps_test.c
index 2ce9804..6f6be4b 100644 (file)
--- a/src/sptps_test.c
+++ b/src/sptps_test.c
@@ -19,6 +19,8 @@
 
 #include "system.h"
 
+#include <getopt.h>
+
 #include "crypto.h"
 #include "ecdsa.h"
 #include "sptps.h"
@@ -49,24 +51,72 @@ static bool receive_record(void *handle, uint8_t type, const char *data, uint16_
        return true;
 }
 
+static struct option const long_options[] = {
+       {"datagram", no_argument, NULL, 'd'},
+       {"packet-loss", required_argument, NULL, 'l'},
+       {"help", no_argument, NULL, 1},
+       {NULL, 0, NULL, 0}
+};
+
+const char *program_name;
+
+static void usage() {
+       fprintf(stderr, "Usage: %s [options] my_ecdsa_key_file his_ecdsa_key_file [host] port\n\n", program_name);
+       fprintf(stderr, "Valid options are:\n"
+                       "  -d, --datagram          Enable datagram mode.\n"
+                       "  -l, --packet-loss RATE  Fake packet loss of RATE percent.\n"
+                       "\n");
+       fprintf(stderr, "Report bugs to tinc@tinc-vpn.org.\n");
+}
+
 int main(int argc, char *argv[]) {
+       program_name = argv[0];
        bool initiator = false;
        bool datagram = false;
+       int packetloss = 0;
+       int r;
+       int option_index = 0;
+
+       while((r = getopt_long(argc, argv, "dl:", long_options, &option_index)) != EOF) {
+               switch (r) {
+                       case 0:   /* long option */
+                               break;
+
+                       case 'd': /* datagram mode */
+                               datagram = true;
+                               break;
+
+                       case 'l': /* packet loss rate */
+                               packetloss = atoi(optarg);
+                               break;
 
-       if(argc > 1 && !strcmp(argv[1], "-d")) {
-               datagram = true;
-               argc--;
-               argv++;
+                       case '?': /* wrong options */
+                               usage();
+                               return 1;
+
+                       case 1: /* help */
+                               usage();
+                               return 0;
+
+                       default:
+                               break;
+               }
        }
 
-       if(argc < 4) {
-               fprintf(stderr, "Usage: %s [-d] my_ecdsa_key_file his_ecdsa_key_file [host] port\n", argv[0]);
+       argc -= optind - 1;
+       argv += optind - 1;
+
+       if(argc < 4 || argc > 5) {
+               fprintf(stderr, "Wrong number of arguments.\n");
+               usage();
                return 1;
        }
 
        if(argc > 4)
                initiator = true;
 
+       srand(time(NULL));
+
 #ifdef HAVE_MINGW
        static struct WSAData wsa_state;
        if(WSAStartup(MAKEWORD(2, 2), &wsa_state))
@@ -202,6 +252,10 @@ int main(int argc, char *argv[]) {
                        char hex[len * 2 + 1];
                        bin2hex(buf, hex, len);
                        fprintf(stderr, "Received %d bytes of data:\n%s\n", (int)len, hex);
+                       if((rand() % 100) < packetloss) {
+                               fprintf(stderr, "Dropped.\n");
+                               continue;
+                       }
                        if(!sptps_receive_data(&s, buf, len))
                                return 1;
                }