void bchannel_transmit(struct bchannel *channel, unsigned char *data, int len);
void bchannel_join(struct bchannel *channel, unsigned short id);
int bchannel_handle(void);
-struct bchannel *bchannel_first = NULL;
struct bchannel *find_bchannel_handle(unsigned long handle);
struct bchannel *find_bchannel_ref(unsigned long ref);
struct bchannel *alloc_bchannel(unsigned long handle);