server_tp.h

#ifndef STP_SERVER_TP_H
#define STP_SERVER_TP_H
 
#include "common/bytes/span/span.h"
#include "common/platform/sys/syscall.h"
 
/* RFC 9000 18.2. Build the server's transport parameters into out->p
 * (out->cap bytes). original_dcid is the DCID of the client's first Initial
 * (RFC 9000 7.3); initial_scid is the server's source connection id. On
 * success writes the TLV sequence and sets out->len; returns 1. Returns 0 if
 * it does not fit. */
#ifndef STP_DEFAULT_MAX_STREAMS_BIDI
#define STP_DEFAULT_MAX_STREAMS_BIDI 100
#endif
#ifndef STP_DEFAULT_MAX_DATA
#define STP_DEFAULT_MAX_DATA 10000000
#endif
#ifndef STP_DEFAULT_IDLE_TIMEOUT_MS
#define STP_DEFAULT_IDLE_TIMEOUT_MS 30000
#endif
#ifndef STP_DEFAULT_STREAM_DATA_LOCAL
#define STP_DEFAULT_STREAM_DATA_LOCAL 49152
#endif
#ifndef STP_DEFAULT_STREAM_DATA_REMOTE
#define STP_DEFAULT_STREAM_DATA_REMOTE 2048
#endif
#ifndef STP_DEFAULT_MAX_STREAMS_UNI
#define STP_DEFAULT_MAX_STREAMS_UNI 100
#endif
typedef struct {
  u64 max_data;         
  u64 max_streams_bidi; 
  u64 max_streams_uni;
  u64 max_datagram_frame_size; 
} stp_limits;
 
int stp_build_server(
    wired_span original_dcid, wired_span initial_scid, wired_obuf* out);
 
/* As stp_build_server, with the tunable limits overriding defaults
 * (lim = 0 keeps every default). */
/* Same as stp_build_server_lim plus retry_source_connection_id
 * (RFC 9000 7.3): emitted only when rscid is non-empty (a Retry actually
 * preceded the handshake -- the peer treats an unexpected one as a
 * TRANSPORT_PARAMETER_ERROR). sreset_token is the 16-byte
 * stateless_reset_token (RFC 9000 10.3.1/18.2) for the handshake SCID;
 * empty omits the TP (a server that never sends resets advertises none). */
int stp_build_server_ret(
    wired_span        original_dcid,
    wired_span        initial_scid,
    wired_span        rscid,
    wired_span        sreset_token,
    const stp_limits* lim,
    wired_obuf*       out);
 
int stp_build_server_lim(
    wired_span        original_dcid,
    wired_span        initial_scid,
    const stp_limits* lim,
    wired_obuf*       out);
 
#endif