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
  40 int
  41 main(void)
  42 {
  43     extern struct vlog_module VLM_reconnect;
  44     struct reconnect_stats prev;
  45     unsigned int old_max_tries;
  46     int old_time;
  47     char line[128];
  48
  49     vlog_set_levels(&VLM_reconnect, VLF_ANY_FACILITY, VLL_EMER);
  50
  51     now = 1000;
  52     reconnect = reconnect_create(now);
  53     reconnect_set_name(reconnect, "remote");
  54     reconnect_get_stats(reconnect, now, &prev);
  55     printf("### t=%d ###\n", now);
  56     old_time = now;
  57     old_max_tries = reconnect_get_max_tries(reconnect);
  58     while (fgets(line, sizeof line, stdin)) {
  59         struct reconnect_stats cur;
  60         struct svec args;
  61
  62         fputs(line, stdout);
  63         if (line[0] == '#') {
  64             continue;
  65         }
  66
  67         svec_init(&args);
  68         svec_parse_words(&args, line);
  69         svec_terminate(&args);
  70         if (!svec_is_empty(&args)) {
  71             run_command(args.n, args.names, commands);
  72         }
  73         svec_destroy(&args);
  74
  75         if (old_time != now) {
  76             printf("\n### t=%d ###\n", now);
  77             old_time = now;
  78         }
  79
  80         reconnect_get_stats(reconnect, now, &cur);
  81         diff_stats(&prev, &cur);
  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
  89     return 0;
  90 }
  91
  92 static void
  93 do_enable(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
  94 {
  95     reconnect_enable(reconnect, now);
  96 }
  97
  98 static void
  99 do_disable(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 100 {
 101     reconnect_disable(reconnect, now);
 102 }
 103
 104 static void
 105 do_force_reconnect(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 106 {
 107     reconnect_force_reconnect(reconnect, now);
 108 }
 109
 110 static int
 111 error_from_string(const char *s)
 112 {
 113     if (!s) {
 114         return 0;
 115     } else if (!strcmp(s, "ECONNREFUSED")) {
 116         return ECONNREFUSED;
 117     } else if (!strcmp(s, "EOF")) {
 118         return EOF;
 119     } else {
 120         ovs_fatal(0, "unknown error '%s'", s);
 121     }
 122 }
 123
 124 static void
 125 do_disconnected(int argc OVS_UNUSED, char *argv[])
 126 {
 127     reconnect_disconnected(reconnect, now, error_from_string(argv[1]));
 128 }
 129
 130 static void
 131 do_connecting(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 132 {
 133     reconnect_connecting(reconnect, now);
 134 }
 135
 136 static void
 137 do_connect_failed(int argc OVS_UNUSED, char *argv[])
 138 {
 139     reconnect_connect_failed(reconnect, now, error_from_string(argv[1]));
 140 }
 141
 142 static void
 143 do_connected(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 144 {
 145     reconnect_connected(reconnect, now);
 146 }
 147
 148 static void
 149 do_received(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 150 {
 151     reconnect_received(reconnect, now);
 152 }
 153
 154 static void
 155 do_run(int argc, char *argv[])
 156 {
 157     enum reconnect_action action;
 158
 159     if (argc > 1) {
 160         now += atoi(argv[1]);
 161     }
 162
 163     action = reconnect_run(reconnect, now);
 164     switch (action) {
 165     default:
 166         if (action != 0) {
 167             NOT_REACHED();
 168         }
 169         break;
 170
 171     case RECONNECT_CONNECT:
 172         printf("  should connect\n");
 173         break;
 174
 175     case RECONNECT_DISCONNECT:
 176         printf("  should disconnect\n");
 177         break;
 178
 179     case RECONNECT_PROBE:
 180         printf("  should send probe\n");
 181         break;
 182     }
 183 }
 184
 185 static void
 186 do_advance(int argc OVS_UNUSED, char *argv[])
 187 {
 188     now += atoi(argv[1]);
 189 }
 190
 191 static void
 192 do_timeout(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 193 {
 194     int timeout = reconnect_timeout(reconnect, now);
 195     if (timeout >= 0) {
 196         printf("  advance %d ms\n", timeout);
 197         now += timeout;
 198     } else {
 199         printf("  no timeout\n");
 200     }
 201 }
 202
 203 static void
 204 do_set_max_tries(int argc OVS_UNUSED, char *argv[])
 205 {
 206     reconnect_set_max_tries(reconnect, atoi(argv[1]));
 207 }
 208
 209 static void
 210 diff_stats(const struct reconnect_stats *old,
 211            const struct reconnect_stats *new)
 212 {
 213     if (old->state != new->state
 214         || old->state_elapsed != new->state_elapsed
 215         || old->backoff != new->backoff) {
 216         printf("  in %s for %u ms (%d ms backoff)\n",
 217                new->state, new->state_elapsed, new->backoff);
 218     }
 219     if (old->creation_time != new->creation_time
 220         || old->last_received != new->last_received
 221         || old->last_connected != new->last_connected) {
 222         printf("  created %lld, last received %lld, last connected %lld\n",
 223                new->creation_time, new->last_received, new->last_connected);
 224     }
 225     if (old->n_successful_connections != new->n_successful_connections
 226         || old->n_attempted_connections != new->n_attempted_connections
 227         || old->seqno != new->seqno) {
 228         printf("  %u successful connections out of %u attempts, seqno %u\n",
 229                new->n_successful_connections, new->n_attempted_connections,
 230                new->seqno);
 231     }
 232     if (old->is_connected != new->is_connected
 233         || old->current_connection_duration != new->current_connection_duration
 234         || old->total_connected_duration != new->total_connected_duration) {
 235         printf("  %sconnected (%u ms), total %u ms connected\n",
 236                new->is_connected ? "" : "not ",
 237                new->current_connection_duration,
 238                new->total_connected_duration);
 239     }
 240 }
 241
 242 static void
 243 do_set_passive(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 244 {
 245     reconnect_set_passive(reconnect, true, now);
 246 }
 247
 248 static void
 249 do_listening(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 250 {
 251     reconnect_listening(reconnect, now);
 252 }
 253
 254 static void
 255 do_listen_error(int argc OVS_UNUSED, char *argv[])
 256 {
 257     reconnect_listen_error(reconnect, now, atoi(argv[1]));
 258 }
 259
 260 static const struct command commands[] = {
 261     { "enable", 0, 0, do_enable },
 262     { "disable", 0, 0, do_disable },
 263     { "force-reconnect", 0, 0, do_force_reconnect },
 264     { "disconnected", 0, 1, do_disconnected },
 265     { "connecting", 0, 0, do_connecting },
 266     { "connect-failed", 0, 1, do_connect_failed },
 267     { "connected", 0, 0, do_connected },
 268     { "received", 0, 0, do_received },
 269     { "run", 0, 1, do_run },
 270     { "advance", 1, 1, do_advance },
 271     { "timeout", 0, 0, do_timeout },
 272     { "set-max-tries", 1, 1, do_set_max_tries },
 273     { "passive", 0, 0, do_set_passive },
 274     { "listening", 0, 0, do_listening },
 275     { "listen-error", 1, 1, do_listen_error },
 276     { NULL, 0, 0, NULL },
 277 };
 278