void connect(TreeLinkNode *root) {
if(root == NULL) return;
if(root->left == NULL && root->right == NULL) return;
if(root->left != NULL)
connect_next(root->left, root);
if(root->right != NULL)
connect_next(root->right, root->next);
connect(root->right);
connect(root->left);
}
void
IghtConnectionState::handle_event(bufferevent *bev, short what, void *opaque)
{
auto self = (IghtConnectionState *) opaque;
(void) bev; // Suppress warning about unused variable
if (self->connecting && self->closing) {
delete (self);
return;
}
if (what & BEV_EVENT_CONNECTED) {
self->connecting = 0;
self->on_connect();
return;
}
if (what & BEV_EVENT_EOF) {
self->on_error(IghtError(0));
return;
}
if (self->connecting) {
ight_info("connection::handle_event - try connect next");
self->connect_next();
return;
}
// TODO: also handle the timeout
self->on_error(IghtError(-1));
}
static lcb_error_t get_refresh(clconfig_provider *provider)
{
http_provider *http = (http_provider *)provider;
/**
* We want a grace interval here because we might already be fetching a
* connection. HOWEVER we don't want to indefinitely wait on a socket
* so we issue a timer indicating how long we expect to wait for a
* streaming update until we get something.
*/
/** If we need a new socket, we do connect_next. */
if (http->connection.state == LCB_CONNSTATE_UNINIT) {
lcb_error_t rc = connect_next(http);
if (rc != LCB_SUCCESS) {
http->as_errcode = rc;
lcb_async_signal(http->as_schederr);
}
return rc;
}
lcb_timer_disarm(http->disconn_timer);
if (http->connection.state == LCB_CONNSTATE_CONNECTED) {
lcb_timer_rearm(http->io_timer,
PROVIDER_SETTING(provider, config_node_timeout));
}
return LCB_SUCCESS;
}
/**
* Call when there is an error in I/O. This includes read, write, connect
* and timeouts.
*/
static lcb_error_t io_error(http_provider *http, lcb_error_t origerr)
{
lcb_error_t err;
lcb_conn_params params;
char *errinfo;
int can_retry = 0;
close_current(http);
params.timeout = PROVIDER_SETTING(&http->base, config_node_timeout);
params.handler = connect_done_handler;
if (http->base.parent->config) {
can_retry = 1;
} else if (origerr != LCB_AUTH_ERROR && origerr != LCB_BUCKET_ENOENT) {
can_retry = 1;
}
if (can_retry) {
err = lcb_connection_next_node(
&http->connection, http->nodes, ¶ms, &errinfo);
} else {
err = origerr;
}
if (err != LCB_SUCCESS) {
lcb_confmon_provider_failed(&http->base, origerr);
lcb_timer_disarm(http->io_timer);
if (is_v220_compat(http)) {
lcb_log(LOGARGS(http, INFO),
"HTTP node list finished. Looping again (disconn_tmo=-1)");
connect_next(http);
}
return origerr;
} else {
setup_request_header(http);
}
return LCB_SUCCESS;
}
void
IghtConnectionState::handle_resolve(int result, char type, int count,
int ttl, void *addresses, void *opaque)
{
auto self = (IghtConnectionState *) opaque;
const char *_family;
const char *p;
int error, family, size;
char string[128];
(void) ttl;
ight_info("handle_resolve - enter");
if (!self->connecting)
abort();
if (self->closing) {
delete (self);
return;
}
if (result != DNS_ERR_NONE)
goto finally;
switch (type) {
case DNS_IPv4_A:
ight_info("handle_resolve - IPv4");
family = PF_INET;
_family = "PF_INET";
size = 4;
break;
case DNS_IPv6_AAAA:
ight_info("handle_resolve - IPv6");
family = PF_INET6;
_family = "PF_INET6";
size = 16;
break;
default:
abort();
}
while (--count >= 0) {
if (count > INT_MAX / size) {
continue;
}
// Note: address already in network byte order
p = inet_ntop(family, (char *)addresses + count * size,
string, sizeof (string));
if (p == NULL) {
ight_warn("handle_resolve - inet_ntop() failed");
continue;
}
ight_info("handle_resolve - address %s", p);
error = self->addrlist->append(string);
if (error != 0) {
ight_warn("handle_resolve - cannot append");
continue;
}
ight_info("handle_resolve - family %s", _family);
error = self->pflist->append(_family);
if (error != 0) {
ight_warn("handle_resolve - cannot append");
// Oops the two vectors are not in sync anymore now
self->connecting = 0;
self->on_error(IghtError(-3));
return;
}
}
finally:
auto dns_base = ight_get_global_evdns_base();
if (self->must_resolve_ipv6) {
self->must_resolve_ipv6 = 0;
evdns_request *request = evdns_base_resolve_ipv6(dns_base,
self->address, DNS_QUERY_NO_SEARCH, self->handle_resolve,
self);
if (request != NULL)
return;
/* FALLTHROUGH */
}
if (self->must_resolve_ipv4) {
self->must_resolve_ipv4 = 0;
evdns_request *request = evdns_base_resolve_ipv4(dns_base,
self->address, DNS_QUERY_NO_SEARCH, self->handle_resolve,
self);
if (request != NULL)
return;
/* FALLTHROUGH */
}
self->connect_next();
}