#include <nghttp2/nghttp2.h>

ssize_t nghttp2_session_mem_recv(nghttp2_session *session, const uint8_t *in, size_t inlen)

Processes data in as an input from the remote endpoint. The inlen indicates the number of bytes in the in.

This function behaves like nghttp2_session_recv() except that it does not use nghttp2_recv_callback to receive data; the in is the only data for the invocation of this function. If all bytes are processed, this function returns. The other callbacks are called in the same way as they are in nghttp2_session_recv().

In the current implementation, this function always tries to processes all input data unless either an error occurs or NGHTTP2_ERR_PAUSE is returned from nghttp2_on_header_callback or nghttp2_on_data_chunk_recv_callback. If NGHTTP2_ERR_PAUSE is used, the return value includes the number of bytes which was used to produce the data or frame for the callback.

This function returns the number of processed bytes, or one of the following negative error codes:

Out of memory.
The callback function failed.
Invalid client magic was detected. This error only returns when session was configured as server and nghttp2_option_set_no_recv_client_magic() is not used with nonzero value.
Flooding was detected in this HTTP/2 session, and it must be closed. This is most likely caused by misbehaviour of peer.