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annotate src/event/ngx_event_quic.h @ 8345:6481427ca3fc quic

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Respecting maximum packet size. The header size macros for long and short packets were fixed to provide correct values in bytes. Currently the sending code limits frames so they don't exceed max_packet_size. But it does not account the case when a single frame can exceed the limit. As a result of this patch, big payload (CRYPTO and STREAM) will be split into a number of smaller frames that fit into advertised max_packet_size (which specifies final packet size, after encryption).
author Vladimir Homutov <vl@nginx.com>
date Mon, 20 Apr 2020 22:25:22 +0300
parents 72d20158c814
children a5141e6b3214
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1
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2 /*
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3 * Copyright (C) Nginx, Inc.
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4 */
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7 #ifndef _NGX_EVENT_QUIC_H_INCLUDED_
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8 #define _NGX_EVENT_QUIC_H_INCLUDED_
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10
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11 #include <ngx_event_openssl.h>
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13
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14 #define NGX_QUIC_DRAFT_VERSION 27
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15 #define NGX_QUIC_VERSION (0xff000000 + NGX_QUIC_DRAFT_VERSION)
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16
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17 #define NGX_QUIC_MAX_SHORT_HEADER 25 /* 1 flags + 20 dcid + 4 pn */
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18 #define NGX_QUIC_MAX_LONG_HEADER 56
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19 /* 1 flags + 4 version + 2 x (1 + 20) s/dcid + 4 pn + 4 len + token len */
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20
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21 #define NGX_QUIC_DEFAULT_MAX_PACKET_SIZE 65527
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22 #define NGX_QUIC_DEFAULT_ACK_DELAY_EXPONENT 3
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23 #define NGX_QUIC_DEFAULT_MAX_ACK_DELAY 25
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24
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25 #define NGX_QUIC_MIN_INITIAL_SIZE 1200
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26
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27 #define NGX_QUIC_STREAM_SERVER_INITIATED 0x01
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28 #define NGX_QUIC_STREAM_UNIDIRECTIONAL 0x02
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29
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30 #define NGX_QUIC_STREAM_BUFSIZE 16384
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31
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32
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33 typedef struct {
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34 /* configurable */
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35 ngx_msec_t max_idle_timeout;
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36 ngx_msec_t max_ack_delay;
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37
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38 ngx_uint_t max_packet_size;
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39 ngx_uint_t initial_max_data;
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40 ngx_uint_t initial_max_stream_data_bidi_local;
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41 ngx_uint_t initial_max_stream_data_bidi_remote;
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42 ngx_uint_t initial_max_stream_data_uni;
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43 ngx_uint_t initial_max_streams_bidi;
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44 ngx_uint_t initial_max_streams_uni;
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45 ngx_uint_t ack_delay_exponent;
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46 ngx_uint_t disable_active_migration;
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47 ngx_uint_t active_connection_id_limit;
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48
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49 /* TODO */
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50 ngx_uint_t original_connection_id;
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51 u_char stateless_reset_token[16];
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52 void *preferred_address;
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53 } ngx_quic_tp_t;
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54
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55
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56 typedef struct {
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57 uint64_t sent;
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58 uint64_t received;
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59 ngx_queue_t frames; /* reorder queue */
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60 size_t total; /* size of buffered data */
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61 } ngx_quic_frames_stream_t;
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62
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63
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64 struct ngx_quic_stream_s {
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65 ngx_rbtree_node_t node;
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66 ngx_connection_t *parent;
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67 ngx_connection_t *c;
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68 uint64_t id;
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69 ngx_buf_t *b;
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70 ngx_quic_frames_stream_t fs;
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71 };
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72
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73
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74 void ngx_quic_run(ngx_connection_t *c, ngx_ssl_t *ssl, ngx_quic_tp_t *tp,
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75 ngx_connection_handler_pt handler);
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76 ngx_connection_t *ngx_quic_create_uni_stream(ngx_connection_t *c);
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78
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79 /********************************* DEBUG *************************************/
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80
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81 #if (NGX_DEBUG)
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82
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83 #define ngx_quic_hexdump(log, fmt, data, len, ...) \
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84 do { \
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85 ngx_int_t m; \
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86 u_char buf[2048]; \
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87 \
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88 if (log->log_level & NGX_LOG_DEBUG_EVENT) { \
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89 m = ngx_hex_dump(buf, (u_char *) data, ngx_min(len, 1024)) - buf; \
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90 ngx_log_debug(NGX_LOG_DEBUG_EVENT, log, 0, \
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91 "%s: " fmt " %*s%s, len: %uz", \
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92 __FUNCTION__, __VA_ARGS__, m, buf, \
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93 len < 2048 ? "" : "...", len); \
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94 } \
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95 } while (0)
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96
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97 #else
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98
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99 #define ngx_quic_hexdump(log, fmt, data, len, ...)
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100
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101 #endif
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102
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103 #define ngx_quic_hexdump0(log, fmt, data, len) \
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104 ngx_quic_hexdump(log, fmt "%s", data, len, "") \
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105
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106
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107 #endif /* _NGX_EVENT_QUIC_H_INCLUDED_ */