Function libnghttp2_sys::nghttp2_submit_ping

pub unsafe extern "C" fn nghttp2_submit_ping(
    session: *mut nghttp2_session, 
    flags: u8, 
    opaque_data: *const u8
) -> c_int

@function

Submits PING frame. You don't have to send PING back when you received PING frame. The library automatically submits PING frame in this case.

The |flags| is bitwise OR of 0 or more of the following value.

• :enum:NGHTTP2_FLAG_ACK

Unless nghttp2_option_set_no_auto_ping_ack() is used, the |flags| should be :enum:NGHTTP2_FLAG_NONE.

If the |opaque_data| is non NULL, then it should point to the 8 bytes array of memory to specify opaque data to send with PING frame. If the |opaque_data| is NULL, zero-cleared 8 bytes will be sent as opaque data.

This function returns 0 if it succeeds, or one of the following negative error codes:

:enum:NGHTTP2_ERR_NOMEM Out of memory.