tests/test-reconnect.c

   1 /*
   2  * Copyright (c) 2009, 2010 Nicira Networks.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18
  19 #include "reconnect.h"
  20
  21 #include <errno.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include "command-line.h"
  27 #include "compiler.h"
  28 #include "svec.h"
  29 #include "util.h"
  30 #include "vlog.h"
  31
  32 static struct reconnect *reconnect;
  33 static int now;
  34
  35 static const struct command commands[];
  36
  37 static void diff_stats(const struct reconnect_stats *old,
  38                        const struct reconnect_stats *new,
  39                        int delta);
  40
  41 int
  42 main(void)
  43 {
  44     extern struct vlog_module VLM_reconnect;
  45     struct reconnect_stats prev;
  46     unsigned int old_max_tries;
  47     int old_time;
  48     char line[128];
  49
  50     vlog_set_levels(&VLM_reconnect, VLF_ANY_FACILITY, VLL_EMER);
  51
  52     now = 1000;
  53     reconnect = reconnect_create(now);
  54     reconnect_set_name(reconnect, "remote");
  55     reconnect_get_stats(reconnect, now, &prev);
  56     printf("### t=%d ###\n", now);
  57     old_time = now;
  58     old_max_tries = reconnect_get_max_tries(reconnect);
  59     while (fgets(line, sizeof line, stdin)) {
  60         struct reconnect_stats cur;
  61         struct svec args;
  62
  63         fputs(line, stdout);
  64         if (line[0] == '#') {
  65             continue;
  66         }
  67
  68         svec_init(&args);
  69         svec_parse_words(&args, line);
  70         svec_terminate(&args);
  71         if (!svec_is_empty(&args)) {
  72             run_command(args.n, args.names, commands);
  73         }
  74         svec_destroy(&args);
  75
  76         if (old_time != now) {
  77             printf("\n### t=%d ###\n", now);
  78         }
  79
  80         reconnect_get_stats(reconnect, now, &cur);
  81         diff_stats(&prev, &cur, now - old_time);
  82         prev = cur;
  83         if (reconnect_get_max_tries(reconnect) != old_max_tries) {
  84             old_max_tries = reconnect_get_max_tries(reconnect);
  85             printf("  %u tries left\n", old_max_tries);
  86         }
  87
  88         old_time = now;
  89     }
  90
  91     return 0;
  92 }
  93
  94 static void
  95 do_enable(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
  96 {
  97     reconnect_enable(reconnect, now);
  98 }
  99
 100 static void
 101 do_disable(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 102 {
 103     reconnect_disable(reconnect, now);
 104 }
 105
 106 static void
 107 do_force_reconnect(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 108 {
 109     reconnect_force_reconnect(reconnect, now);
 110 }
 111
 112 static int
 113 error_from_string(const char *s)
 114 {
 115     if (!s) {
 116         return 0;
 117     } else if (!strcmp(s, "ECONNREFUSED")) {
 118         return ECONNREFUSED;
 119     } else if (!strcmp(s, "EOF")) {
 120         return EOF;
 121     } else {
 122         ovs_fatal(0, "unknown error '%s'", s);
 123     }
 124 }
 125
 126 static void
 127 do_disconnected(int argc OVS_UNUSED, char *argv[])
 128 {
 129     reconnect_disconnected(reconnect, now, error_from_string(argv[1]));
 130 }
 131
 132 static void
 133 do_connecting(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 134 {
 135     reconnect_connecting(reconnect, now);
 136 }
 137
 138 static void
 139 do_connect_failed(int argc OVS_UNUSED, char *argv[])
 140 {
 141     reconnect_connect_failed(reconnect, now, error_from_string(argv[1]));
 142 }
 143
 144 static void
 145 do_connected(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 146 {
 147     reconnect_connected(reconnect, now);
 148 }
 149
 150 static void
 151 do_received(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 152 {
 153     reconnect_received(reconnect, now);
 154 }
 155
 156 static void
 157 do_run(int argc, char *argv[])
 158 {
 159     enum reconnect_action action;
 160
 161     if (argc > 1) {
 162         now += atoi(argv[1]);
 163     }
 164
 165     action = reconnect_run(reconnect, now);
 166     switch (action) {
 167     default:
 168         if (action != 0) {
 169             NOT_REACHED();
 170         }
 171         break;
 172
 173     case RECONNECT_CONNECT:
 174         printf("  should connect\n");
 175         break;
 176
 177     case RECONNECT_DISCONNECT:
 178         printf("  should disconnect\n");
 179         break;
 180
 181     case RECONNECT_PROBE:
 182         printf("  should send probe\n");
 183         break;
 184     }
 185 }
 186
 187 static void
 188 do_advance(int argc OVS_UNUSED, char *argv[])
 189 {
 190     now += atoi(argv[1]);
 191 }
 192
 193 static void
 194 do_timeout(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 195 {
 196     int timeout = reconnect_timeout(reconnect, now);
 197     if (timeout >= 0) {
 198         printf("  advance %d ms\n", timeout);
 199         now += timeout;
 200     } else {
 201         printf("  no timeout\n");
 202     }
 203 }
 204
 205 static void
 206 do_set_max_tries(int argc OVS_UNUSED, char *argv[])
 207 {
 208     reconnect_set_max_tries(reconnect, atoi(argv[1]));
 209 }
 210
 211 static void
 212 diff_stats(const struct reconnect_stats *old,
 213            const struct reconnect_stats *new,
 214            int delta)
 215 {
 216     if (old->state != new->state
 217         || old->state_elapsed != new->state_elapsed
 218         || old->backoff != new->backoff) {
 219         printf("  in %s for %u ms (%d ms backoff)\n",
 220                new->state, new->state_elapsed, new->backoff);
 221     }
 222     if (old->creation_time != new->creation_time
 223         || old->last_received != new->last_received
 224         || old->last_connected != new->last_connected) {
 225         printf("  created %lld, last received %lld, last connected %lld\n",
 226                new->creation_time, new->last_received, new->last_connected);
 227     }
 228     if (old->n_successful_connections != new->n_successful_connections
 229         || old->n_attempted_connections != new->n_attempted_connections
 230         || old->seqno != new->seqno) {
 231         printf("  %u successful connections out of %u attempts, seqno %u\n",
 232                new->n_successful_connections, new->n_attempted_connections,
 233                new->seqno);
 234     }
 235     if (old->is_connected != new->is_connected) {
 236         printf("  %sconnected\n", new->is_connected ? "" : "dis");
 237     }
 238     if (old->last_connected != new->last_connected
 239         || (old->msec_since_connect != new->msec_since_connect - delta
 240             && !(old->msec_since_connect == UINT_MAX
 241                  && new->msec_since_connect == UINT_MAX))
 242         || (old->total_connected_duration != new->total_connected_duration - delta
 243             && !(old->total_connected_duration == 0
 244                  && new->total_connected_duration == 0))) {
 245         printf("  last connected %u ms ago, connected %u ms total\n",
 246                new->msec_since_connect, new->total_connected_duration);
 247     }
 248     if (old->last_disconnected != new->last_disconnected
 249         || (old->msec_since_disconnect != new->msec_since_disconnect - delta
 250             && !(old->msec_since_disconnect == UINT_MAX
 251                  && new->msec_since_disconnect == UINT_MAX))) {
 252         printf("  disconnected at %llu ms (%u ms ago)\n",
 253                new->last_disconnected, new->msec_since_disconnect);
 254     }
 255 }
 256
 257 static void
 258 do_set_passive(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 259 {
 260     reconnect_set_passive(reconnect, true, now);
 261 }
 262
 263 static void
 264 do_listening(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 265 {
 266     reconnect_listening(reconnect, now);
 267 }
 268
 269 static void
 270 do_listen_error(int argc OVS_UNUSED, char *argv[])
 271 {
 272     reconnect_listen_error(reconnect, now, atoi(argv[1]));
 273 }
 274
 275 static const struct command commands[] = {
 276     { "enable", 0, 0, do_enable },
 277     { "disable", 0, 0, do_disable },
 278     { "force-reconnect", 0, 0, do_force_reconnect },
 279     { "disconnected", 0, 1, do_disconnected },
 280     { "connecting", 0, 0, do_connecting },
 281     { "connect-failed", 0, 1, do_connect_failed },
 282     { "connected", 0, 0, do_connected },
 283     { "received", 0, 0, do_received },
 284     { "run", 0, 1, do_run },
 285     { "advance", 1, 1, do_advance },
 286     { "timeout", 0, 0, do_timeout },
 287     { "set-max-tries", 1, 1, do_set_max_tries },
 288     { "passive", 0, 0, do_set_passive },
 289     { "listening", 0, 0, do_listening },
 290     { "listen-error", 1, 1, do_listen_error },
 291     { NULL, 0, 0, NULL },
 292 };