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
  31 static struct reconnect *reconnect;
  32 static int now;
  33
  34 static const struct command commands[];
  35
  36 static void diff_stats(const struct reconnect_stats *old,
  37                        const struct reconnect_stats *new);
  38
  39 int
  40 main(void)
  41 {
  42     struct reconnect_stats prev;
  43     unsigned int old_max_tries;
  44     int old_time;
  45     char line[128];
  46
  47     now = 1000;
  48     reconnect = reconnect_create(now);
  49     reconnect_set_name(reconnect, "remote");
  50     reconnect_get_stats(reconnect, now, &prev);
  51     printf("### t=%d ###\n", now);
  52     old_time = now;
  53     old_max_tries = reconnect_get_max_tries(reconnect);
  54     while (fgets(line, sizeof line, stdin)) {
  55         struct reconnect_stats cur;
  56         struct svec args;
  57
  58         fputs(line, stdout);
  59         if (line[0] == '#') {
  60             continue;
  61         }
  62
  63         svec_init(&args);
  64         svec_parse_words(&args, line);
  65         svec_terminate(&args);
  66         if (!svec_is_empty(&args)) {
  67             run_command(args.n, args.names, commands);
  68         }
  69         svec_destroy(&args);
  70
  71         if (old_time != now) {
  72             printf("\n### t=%d ###\n", now);
  73             old_time = now;
  74         }
  75
  76         reconnect_get_stats(reconnect, now, &cur);
  77         diff_stats(&prev, &cur);
  78         prev = cur;
  79         if (reconnect_get_max_tries(reconnect) != old_max_tries) {
  80             old_max_tries = reconnect_get_max_tries(reconnect);
  81             printf("  %u tries left\n", old_max_tries);
  82         }
  83     }
  84
  85     return 0;
  86 }
  87
  88 static void
  89 do_enable(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
  90 {
  91     reconnect_enable(reconnect, now);
  92 }
  93
  94 static void
  95 do_disable(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
  96 {
  97     reconnect_disable(reconnect, now);
  98 }
  99
 100 static void
 101 do_force_reconnect(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 102 {
 103     reconnect_force_reconnect(reconnect, now);
 104 }
 105
 106 static int
 107 error_from_string(const char *s)
 108 {
 109     if (!s) {
 110         return 0;
 111     } else if (!strcmp(s, "ECONNREFUSED")) {
 112         return ECONNREFUSED;
 113     } else if (!strcmp(s, "EOF")) {
 114         return EOF;
 115     } else {
 116         ovs_fatal(0, "unknown error '%s'", s);
 117     }
 118 }
 119
 120 static void
 121 do_disconnected(int argc OVS_UNUSED, char *argv[])
 122 {
 123     reconnect_disconnected(reconnect, now, error_from_string(argv[1]));
 124 }
 125
 126 static void
 127 do_connecting(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 128 {
 129     reconnect_connecting(reconnect, now);
 130 }
 131
 132 static void
 133 do_connect_failed(int argc OVS_UNUSED, char *argv[])
 134 {
 135     reconnect_connect_failed(reconnect, now, error_from_string(argv[1]));
 136 }
 137
 138 static void
 139 do_connected(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 140 {
 141     reconnect_connected(reconnect, now);
 142 }
 143
 144 static void
 145 do_received(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 146 {
 147     reconnect_received(reconnect, now);
 148 }
 149
 150 static void
 151 do_run(int argc, char *argv[])
 152 {
 153     enum reconnect_action action;
 154
 155     if (argc > 1) {
 156         now += atoi(argv[1]);
 157     }
 158
 159     action = reconnect_run(reconnect, now);
 160     switch (action) {
 161     default:
 162         if (action != 0) {
 163             NOT_REACHED();
 164         }
 165         break;
 166
 167     case RECONNECT_CONNECT:
 168         printf("  should connect\n");
 169         break;
 170
 171     case RECONNECT_DISCONNECT:
 172         printf("  should disconnect\n");
 173         break;
 174
 175     case RECONNECT_PROBE:
 176         printf("  should send probe\n");
 177         break;
 178     }
 179 }
 180
 181 static void
 182 do_advance(int argc OVS_UNUSED, char *argv[])
 183 {
 184     now += atoi(argv[1]);
 185 }
 186
 187 static void
 188 do_timeout(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 189 {
 190     int timeout = reconnect_timeout(reconnect, now);
 191     if (timeout >= 0) {
 192         printf("  advance %d ms\n", timeout);
 193         now += timeout;
 194     } else {
 195         printf("  no timeout\n");
 196     }
 197 }
 198
 199 static void
 200 do_set_max_tries(int argc OVS_UNUSED, char *argv[])
 201 {
 202     reconnect_set_max_tries(reconnect, atoi(argv[1]));
 203 }
 204
 205 static void
 206 diff_stats(const struct reconnect_stats *old,
 207            const struct reconnect_stats *new)
 208 {
 209     if (old->state != new->state
 210         || old->state_elapsed != new->state_elapsed
 211         || old->backoff != new->backoff) {
 212         printf("  in %s for %u ms (%d ms backoff)\n",
 213                new->state, new->state_elapsed, new->backoff);
 214     }
 215     if (old->creation_time != new->creation_time
 216         || old->last_received != new->last_received
 217         || old->last_connected != new->last_connected) {
 218         printf("  created %lld, last received %lld, last connected %lld\n",
 219                new->creation_time, new->last_received, new->last_connected);
 220     }
 221     if (old->n_successful_connections != new->n_successful_connections
 222         || old->n_attempted_connections != new->n_attempted_connections
 223         || old->seqno != new->seqno) {
 224         printf("  %u successful connections out of %u attempts, seqno %u\n",
 225                new->n_successful_connections, new->n_attempted_connections,
 226                new->seqno);
 227     }
 228     if (old->is_connected != new->is_connected
 229         || old->current_connection_duration != new->current_connection_duration
 230         || old->total_connected_duration != new->total_connected_duration) {
 231         printf("  %sconnected (%u ms), total %u ms connected\n",
 232                new->is_connected ? "" : "not ",
 233                new->current_connection_duration,
 234                new->total_connected_duration);
 235     }
 236 }
 237
 238 static const struct command commands[] = {
 239     { "enable", 0, 0, do_enable },
 240     { "disable", 0, 0, do_disable },
 241     { "force-reconnect", 0, 0, do_force_reconnect },
 242     { "disconnected", 0, 1, do_disconnected },
 243     { "connecting", 0, 0, do_connecting },
 244     { "connect-failed", 0, 1, do_connect_failed },
 245     { "connected", 0, 0, do_connected },
 246     { "received", 0, 0, do_received },
 247     { "run", 0, 1, do_run },
 248     { "advance", 1, 1, do_advance },
 249     { "timeout", 0, 0, do_timeout },
 250     { "set-max-tries", 1, 1, do_set_max_tries },
 251     { NULL, 0, 0, NULL },
 252 };
 253