Constant esp_idf_sys::pbuf_type_PBUF_RAM

pub const pbuf_type_PBUF_RAM: pbuf_type = 640;

pbuf data is stored in RAM, used for TX mostly, struct pbuf and its payload are allocated in one piece of contiguous memory (so the first payload byte can be calculated from struct pbuf). pbuf_alloc() allocates PBUF_RAM pbufs as unchained pbufs (although that might change in future versions). This should be used for all OUTGOING packets (TX).