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degesch: add exponential reconnect backoff

This commit is contained in:
Přemysl Eric Janouch 2015-07-17 21:18:05 +02:00
parent 403dbc83ab
commit b3acc4904f
1 changed files with 29 additions and 1 deletions
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30
degesch.c
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@ -1116,6 +1116,7 @@ struct server
enum server_state state; ///< Connection state
struct connector *connector; ///< Connection establisher
unsigned reconnect_attempt; ///< Number of reconnect attempt
bool manual_disconnect; ///< Don't reconnect after disconnect
int socket; ///< Socket FD of the server
@ -1613,6 +1614,17 @@ static struct config_schema g_config_behaviour[] =
.type = CONFIG_ITEM_BOOLEAN,
.default_ = "off",
.on_change = on_config_debug_mode_change },
{ .name = "reconnect_delay_growing",
.comment = "Growing factor for reconnect delay",
.type = CONFIG_ITEM_INTEGER,
.validate = config_validate_nonnegative,
.default_ = "2" },
{ .name = "reconnect_delay_max",
.comment = "Maximum reconnect delay in seconds",
.type = CONFIG_ITEM_INTEGER,
.validate = config_validate_nonnegative,
.default_ = "600" },
{}
};
@ -3467,7 +3479,18 @@ irc_queue_reconnect (struct server *s)
return;
int64_t delay = get_config_integer (s->config, "reconnect_delay");
// TODO: exponentional backoff
int64_t delay_factor = get_config_integer (s->ctx->config.root,
"behaviour.reconnect_delay_growing");
int64_t delay_max = get_config_integer (s->ctx->config.root,
"behaviour.reconnect_delay_max");
for (unsigned i = 0; i < s->reconnect_attempt; i++)
delay *= delay_factor;
if (delay > delay_max || delay < 0)
delay = delay_max;
s->reconnect_attempt++;
// XXX: maybe add a state for when a connect is queued?
hard_assert (s->state == IRC_DISCONNECTED);
log_server_status (s, s->buffer,
@ -3671,7 +3694,10 @@ irc_disconnect (struct server *s)
else if (s->manual_disconnect)
s->manual_disconnect = false;
else
{
s->reconnect_attempt = 0;
irc_queue_reconnect (s);
}
refresh_prompt (s->ctx);
}
@ -4420,6 +4446,8 @@ irc_initiate_connect (struct server *s)
return;
}
s->reconnect_attempt = 0;
struct str_vector servers;
str_vector_init (&servers);
cstr_split_ignore_empty (addresses, ',', &servers);