static void
connectHostResolveCallback(ResolveState *resolveState,
struct addrinfo *info) {
ConnectState *connectState =
(ConnectState *) ResolveState_getExtra(resolveState);
connectState->state = Connect_connecting;
Resolve_close(resolveState);
connectState->resolveState = NULL;
if (connectState->flags.familyPrefer != PF_UNSPEC) {
// Reorganise the 'info' list to put the structures of the
// prefered family in front.
struct addrinfo *preferred;
struct addrinfo **preferredEnd;
struct addrinfo *rest;
struct addrinfo **restEnd;
splitAddrInfoOnFamily(info, connectState->flags.familyPrefer,
&preferred, &preferredEnd, &rest, &restEnd);
info = preferred;
*preferredEnd = rest;
}
connectState->info = info;
connectState->infoPtr = info;
connectHostNext(connectState);
}
static void
connectRetryCallback(ConnectState *connectState) {
connectState->alarm = NULL;
connectState->infoPtr = connectState->info;
connectHostNext(connectState);
}
static void
connectCallback(NetDescriptor *nd) {
// Called by the NetManager when a connection has been established.
ConnectState *connectState =
(ConnectState *) NetDescriptor_getExtra(nd);
int err;
if (connectState->alarm != NULL) {
Alarm_remove(connectState->alarm);
connectState->alarm = NULL;
}
if (connectState->state == Connect_closed) {
// The connection attempt has been aborted.
#ifdef DEBUG
log_add(log_Debug, "Connection attempt was aborted.");
#endif
ConnectState_decRef(connectState);
return;
}
if (Socket_getError(NetDescriptor_getSocket(nd), &err) == -1) {
log_add(log_Fatal, "Socket_getError() failed: %s.",
strerror(errno));
explode();
}
if (err != 0) {
#ifdef DEBUG
log_add(log_Debug, "connect() failed: %s.", strerror(err));
#endif
NetDescriptor_close(nd);
connectState->nd = NULL;
connectState->infoPtr = connectState->infoPtr->ai_next;
connectHostNext(connectState);
return;
}
#ifdef DEBUG
log_add(log_Debug, "Connection established.");
#endif
// Notify the higher layer.
connectState->nd = NULL;
// The callback function takes over ownership of the
// NetDescriptor.
NetDescriptor_setWriteCallback(nd, NULL);
// Note that connectState->info and connectState->infoPtr are cleaned up
// when ConnectState_close() is called by the callback function.
ConnectState_incRef(connectState);
doConnectCallback(connectState, nd, connectState->infoPtr->ai_addr,
connectState->infoPtr->ai_addrlen);
{
// The callback called should release the last reference to
// the connectState, by calling ConnectState_close().
bool released = ConnectState_decRef(connectState);
assert(released);
(void) released; // In case assert() evaluates to nothing.
}
}
static void
connectTimeoutCallback(ConnectState *connectState) {
connectState->alarm = NULL;
NetDescriptor_close(connectState->nd);
connectState->nd = NULL;
connectState->infoPtr = connectState->infoPtr->ai_next;
connectHostNext(connectState);
}