lsquic_packet_resize.h revision b8fa6195 
1/* Copyright (c) 2017 - 2020 LiteSpeed Technologies Inc.  See LICENSE. */
2/*
3 * lsquic_packet_resize.h -- functions to resize packets
4 */
5
6#ifndef LSQUIC_PACKET_RESIZE_H
7#define LSQUIC_PACKET_RESIZE_H 1
8
9struct lsquic_packet_out;
10struct lsquic_conn;
11struct frame_rec;
12struct lsquic_engine_public;
13
14struct packet_resize_if
15{
16    /* Get next packet to convert */
17    struct lsquic_packet_out *
18                      (*pri_next_packet)(void *ctx);
19    /* Discard packet after it was converted */
20    void              (*pri_discard_packet)(void *ctx, struct lsquic_packet_out *);
21    /* Get new packet to write frames to */
22    struct lsquic_packet_out *
23                      (*pri_new_packet)(void *ctx);
24};
25
26struct packet_resize_ctx
27{
28    const struct lsquic_conn        *prc_conn;
29    void                            *prc_data;      /* First arg to prc_pri */
30    const struct packet_resize_if   *prc_pri;
31    struct lsquic_engine_public     *prc_enpub;
32    const struct frame_rec          *prc_cur_frec;
33    struct lsquic_packet_out        *prc_cur_packet;
34    struct data_frame                prc_data_frame;
35    struct packet_out_frec_iter      prc_pofi;
36    enum {
37        PRC_ERROR       = 1 << 0,
38        PRC_NEW_FREC    = 1 << 1,
39    }                                prc_flags;
40};
41
42void
43lsquic_packet_resize_init (struct packet_resize_ctx *,
44    struct lsquic_engine_public *, struct lsquic_conn *, void *ctx,
45    const struct packet_resize_if *);
46
47struct lsquic_packet_out *
48lsquic_packet_resize_next (struct packet_resize_ctx *);
49
50#define lsquic_packet_resize_is_error(prctx_) \
51                                    (!!((prctx_)->prc_flags & PRC_ERROR))
52
53#endif
54