2 nghttp2_pack_settings_payload
3 =============================
8 *#include <nghttp2/nghttp2.h>*
10 .. function:: ssize_t nghttp2_pack_settings_payload( uint8_t *buf, size_t buflen, const nghttp2_settings_entry *iv, size_t niv)
13 Serializes the SETTINGS values *iv* in the *buf*. The size of the
14 *buf* is specified by *buflen*. The number of entries in the *iv*
15 array is given by *niv*. The required space in *buf* for the *niv*
16 entries is ``6*niv`` bytes and if the given buffer is too small, an
17 error is returned. This function is used mainly for creating a
18 SETTINGS payload to be sent with the ``HTTP2-Settings`` header
19 field in an HTTP Upgrade request. The data written in *buf* is NOT
20 base64url encoded and the application is responsible for encoding.
22 This function returns the number of bytes written in *buf*, or one
23 of the following negative error codes:
25 :macro:`NGHTTP2_ERR_INVALID_ARGUMENT`
26 The *iv* contains duplicate settings ID or invalid value.
28 :macro:`NGHTTP2_ERR_INSUFF_BUFSIZE`
29 The provided *buflen* size is too small to hold the output.