snap_header_t *h = va_arg (*args, snap_header_t *);
snap_protocol_info_t *pi = snap_get_protocol_info (sm, h);
u32 max_header_bytes = va_arg (*args, u32);
snap_header_t *h = va_arg (*args, snap_header_t *);
snap_protocol_info_t *pi = snap_get_protocol_info (sm, h);
u32 max_header_bytes = va_arg (*args, u32);