CHANNEL_PASSIVE
#define IS_CHAN_PASSIVE(_c) (((_c)->channelFlags & CHANNEL_PASSIVE) != 0)
flags = c->channelFlags & (CHANNEL_ALL | CHANNEL_PASSIVE);
channelFlags |= CHANNEL_PASSIVE;
channelFlags &= ~CHANNEL_PASSIVE;
if (channelFlags & CHANNEL_PASSIVE) {
channelFlags &= ~CHANNEL_PASSIVE;
#define CHANNEL_COMPAT (CHANNEL_ALL_NOTURBO | CHANNEL_PASSIVE)