272 lines
9.3 KiB
C
272 lines
9.3 KiB
C
/*
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* Copyright (C) Nginx, Inc.
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*/
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#ifndef _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_
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#define _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_event.h>
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typedef struct ngx_quic_connection_s ngx_quic_connection_t;
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typedef struct ngx_quic_server_id_s ngx_quic_server_id_t;
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typedef struct ngx_quic_client_id_s ngx_quic_client_id_t;
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typedef struct ngx_quic_send_ctx_s ngx_quic_send_ctx_t;
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typedef struct ngx_quic_socket_s ngx_quic_socket_t;
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typedef struct ngx_quic_path_s ngx_quic_path_t;
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typedef struct ngx_quic_keys_s ngx_quic_keys_t;
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#include <ngx_event_quic_transport.h>
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#include <ngx_event_quic_protection.h>
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#include <ngx_event_quic_frames.h>
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#include <ngx_event_quic_migration.h>
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#include <ngx_event_quic_connid.h>
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#include <ngx_event_quic_streams.h>
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#include <ngx_event_quic_ssl.h>
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#include <ngx_event_quic_tokens.h>
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#include <ngx_event_quic_ack.h>
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#include <ngx_event_quic_output.h>
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#include <ngx_event_quic_socket.h>
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/* quic-recovery, section 6.2.2, kInitialRtt */
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#define NGX_QUIC_INITIAL_RTT 333 /* ms */
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#define NGX_QUIC_UNSET_PN (uint64_t) -1
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#define NGX_QUIC_SEND_CTX_LAST (NGX_QUIC_ENCRYPTION_LAST - 1)
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/* 0-RTT and 1-RTT data exist in the same packet number space,
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* so we have 3 packet number spaces:
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*
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* 0 - Initial
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* 1 - Handshake
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* 2 - 0-RTT and 1-RTT
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*/
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#define ngx_quic_get_send_ctx(qc, level) \
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((level) == ssl_encryption_initial) ? &((qc)->send_ctx[0]) \
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: (((level) == ssl_encryption_handshake) ? &((qc)->send_ctx[1]) \
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: &((qc)->send_ctx[2]))
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#define ngx_quic_get_connection(c) \
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(((c)->udp) ? (((ngx_quic_socket_t *)((c)->udp))->quic) : NULL)
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#define ngx_quic_get_socket(c) ((ngx_quic_socket_t *)((c)->udp))
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struct ngx_quic_client_id_s {
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ngx_queue_t queue;
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uint64_t seqnum;
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size_t len;
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u_char id[NGX_QUIC_CID_LEN_MAX];
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u_char sr_token[NGX_QUIC_SR_TOKEN_LEN];
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ngx_uint_t refcnt;
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};
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struct ngx_quic_server_id_s {
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uint64_t seqnum;
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size_t len;
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u_char id[NGX_QUIC_CID_LEN_MAX];
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};
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struct ngx_quic_path_s {
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ngx_queue_t queue;
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struct sockaddr *sockaddr;
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socklen_t socklen;
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ngx_uint_t state;
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ngx_msec_t expires;
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ngx_uint_t tries;
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off_t sent;
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off_t received;
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u_char challenge1[8];
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u_char challenge2[8];
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ngx_uint_t refcnt;
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uint64_t seqnum;
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time_t validated_at;
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ngx_str_t addr_text;
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u_char text[NGX_SOCKADDR_STRLEN];
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};
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struct ngx_quic_socket_s {
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ngx_udp_connection_t udp;
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ngx_quic_connection_t *quic;
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ngx_queue_t queue;
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ngx_quic_server_id_t sid;
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ngx_quic_path_t *path;
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ngx_quic_client_id_t *cid;
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};
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typedef struct {
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ngx_rbtree_t tree;
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ngx_rbtree_node_t sentinel;
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uint64_t received;
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uint64_t sent;
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uint64_t recv_max_data;
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uint64_t send_max_data;
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uint64_t server_max_streams_uni;
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uint64_t server_max_streams_bidi;
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uint64_t server_streams_uni;
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uint64_t server_streams_bidi;
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uint64_t client_max_streams_uni;
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uint64_t client_max_streams_bidi;
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uint64_t client_streams_uni;
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uint64_t client_streams_bidi;
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} ngx_quic_streams_t;
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typedef struct {
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size_t in_flight;
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size_t window;
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size_t ssthresh;
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ngx_msec_t recovery_start;
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} ngx_quic_congestion_t;
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struct ngx_quic_frames_stream_s {
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uint64_t sent;
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uint64_t received;
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ngx_queue_t frames; /* reorder queue */
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size_t total; /* size of buffered data */
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};
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/*
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* 12.3. Packet Numbers
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*
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* Conceptually, a packet number space is the context in which a packet
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* can be processed and acknowledged. Initial packets can only be sent
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* with Initial packet protection keys and acknowledged in packets which
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* are also Initial packets.
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*/
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struct ngx_quic_send_ctx_s {
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enum ssl_encryption_level_t level;
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uint64_t pnum; /* to be sent */
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uint64_t largest_ack; /* received from peer */
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uint64_t largest_pn; /* received from peer */
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ngx_queue_t frames;
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ngx_queue_t sent;
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uint64_t pending_ack; /* non sent ack-eliciting */
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uint64_t largest_range;
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uint64_t first_range;
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ngx_msec_t largest_received;
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ngx_msec_t ack_delay_start;
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ngx_uint_t nranges;
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ngx_quic_ack_range_t ranges[NGX_QUIC_MAX_RANGES];
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ngx_uint_t send_ack;
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};
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struct ngx_quic_connection_s {
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uint32_t version;
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ngx_quic_socket_t *socket;
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ngx_quic_socket_t *backup;
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ngx_queue_t sockets;
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ngx_queue_t paths;
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ngx_queue_t client_ids;
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ngx_queue_t free_sockets;
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ngx_queue_t free_paths;
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ngx_queue_t free_client_ids;
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ngx_uint_t nsockets;
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ngx_uint_t nclient_ids;
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uint64_t max_retired_seqnum;
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uint64_t client_seqnum;
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uint64_t server_seqnum;
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uint64_t path_seqnum;
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ngx_uint_t client_tp_done;
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ngx_quic_tp_t tp;
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ngx_quic_tp_t ctp;
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ngx_quic_send_ctx_t send_ctx[NGX_QUIC_SEND_CTX_LAST];
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ngx_quic_frames_stream_t crypto[NGX_QUIC_ENCRYPTION_LAST];
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ngx_quic_keys_t *keys;
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ngx_quic_conf_t *conf;
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ngx_event_t push;
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ngx_event_t pto;
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ngx_event_t close;
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ngx_event_t path_validation;
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ngx_msec_t last_cc;
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ngx_msec_t latest_rtt;
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ngx_msec_t avg_rtt;
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ngx_msec_t min_rtt;
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ngx_msec_t rttvar;
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ngx_uint_t pto_count;
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ngx_queue_t free_frames;
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ngx_chain_t *free_bufs;
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ngx_buf_t *free_shadow_bufs;
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#ifdef NGX_QUIC_DEBUG_ALLOC
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ngx_uint_t nframes;
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ngx_uint_t nbufs;
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#endif
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ngx_quic_streams_t streams;
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ngx_quic_congestion_t congestion;
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ngx_uint_t error;
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enum ssl_encryption_level_t error_level;
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ngx_uint_t error_ftype;
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const char *error_reason;
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ngx_uint_t shutdown_code;
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const char *shutdown_reason;
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unsigned error_app:1;
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unsigned send_timer_set:1;
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unsigned closing:1;
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unsigned shutdown:1;
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unsigned draining:1;
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unsigned key_phase:1;
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unsigned validated:1;
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};
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ngx_int_t ngx_quic_apply_transport_params(ngx_connection_t *c,
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ngx_quic_tp_t *ctp);
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void ngx_quic_discard_ctx(ngx_connection_t *c,
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enum ssl_encryption_level_t level);
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void ngx_quic_close_connection(ngx_connection_t *c, ngx_int_t rc);
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void ngx_quic_shutdown_quic(ngx_connection_t *c);
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/********************************* DEBUG *************************************/
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#if (NGX_DEBUG)
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void ngx_quic_connstate_dbg(ngx_connection_t *c);
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#else
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#define ngx_quic_connstate_dbg(c)
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#endif
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/* #define NGX_QUIC_DEBUG_PACKETS */ /* dump packet contents */
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/* #define NGX_QUIC_DEBUG_FRAMES */ /* dump frames contents */
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/* #define NGX_QUIC_DEBUG_ALLOC */ /* log frames and bufs alloc */
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/* #define NGX_QUIC_DEBUG_CRYPTO */
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#endif /* _NGX_EVENT_QUIC_CONNECTION_H_INCLUDED_ */
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