Line data Source code
1 : #ifndef HEADER_fd_src_waltz_quic_fd_quic_conn_h
2 : #define HEADER_fd_src_waltz_quic_fd_quic_conn_h
3 :
4 : #include "fd_quic.h"
5 : #include "fd_quic_ack_tx.h"
6 : #include "fd_quic_stream.h"
7 : #include "fd_quic_conn_id.h"
8 : #include "crypto/fd_quic_crypto_suites.h"
9 : #include "fd_quic_pkt_meta.h"
10 : #include "../fd_rtt_est.h"
11 :
12 945876 : #define FD_QUIC_CONN_STATE_INVALID 0 /* dead object / freed */
13 344415 : #define FD_QUIC_CONN_STATE_HANDSHAKE 1 /* currently doing handshaking with peer */
14 90324 : #define FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE 2 /* handshake complete, confirming with peer */
15 51000723 : #define FD_QUIC_CONN_STATE_ACTIVE 3 /* connection established - data may be transferred */
16 42051 : #define FD_QUIC_CONN_STATE_PEER_CLOSE 4 /* peer requested close */
17 12426 : #define FD_QUIC_CONN_STATE_ABORT 5 /* connection terminating due to error */
18 42390 : #define FD_QUIC_CONN_STATE_CLOSE_PENDING 6 /* connection is closing */
19 79589474 : #define FD_QUIC_CONN_STATE_DEAD 7 /* connection about to be freed */
20 :
21 : #define FD_QUIC_REASON_CODES(X,SEP) \
22 0 : X(NO_ERROR , 0x00 , "No error" ) SEP \
23 0 : X(INTERNAL_ERROR , 0x01 , "Implementation error" ) SEP \
24 0 : X(CONNECTION_REFUSED , 0x02 , "Server refuses a connection" ) SEP \
25 0 : X(FLOW_CONTROL_ERROR , 0x03 , "Flow control error" ) SEP \
26 0 : X(STREAM_LIMIT_ERROR , 0x04 , "Too many streams opened" ) SEP \
27 0 : X(STREAM_STATE_ERROR , 0x05 , "Frame received in invalid stream state" ) SEP \
28 0 : X(FINAL_SIZE_ERROR , 0x06 , "Change to final size" ) SEP \
29 0 : X(FRAME_ENCODING_ERROR , 0x07 , "Frame encoding error" ) SEP \
30 0 : X(TRANSPORT_PARAMETER_ERROR , 0x08 , "Error in transport parameters" ) SEP \
31 0 : X(CONNECTION_ID_LIMIT_ERROR , 0x09 , "Too many connection IDs received" ) SEP \
32 0 : X(PROTOCOL_VIOLATION , 0x0a , "Generic protocol violation" ) SEP \
33 0 : X(INVALID_TOKEN , 0x0b , "Invalid Token received" ) SEP \
34 0 : X(APPLICATION_ERROR , 0x0c , "Application error" ) SEP \
35 0 : X(CRYPTO_BUFFER_EXCEEDED , 0x0d , "CRYPTO data buffer overflowed" ) SEP \
36 0 : X(KEY_UPDATE_ERROR , 0x0e , "Invalid packet protection update" ) SEP \
37 0 : X(AEAD_LIMIT_REACHED , 0x0f , "Excessive use of packet protection keys" ) SEP \
38 0 : X(NO_VIABLE_PATH , 0x10 , "No viable network path exists" ) SEP \
39 0 : X(CRYPTO_BASE , 0x100 , "0x0100-0x01ff CRYPTO_ERROR TLS alert code" ) SEP \
40 0 : X(HANDSHAKE_FAILURE , 0x128 , "Handshake failed" )
41 :
42 : enum {
43 : # define COMMA ,
44 : # define _(NAME,CODE,DESC) \
45 : FD_QUIC_CONN_REASON_##NAME = CODE
46 : FD_QUIC_REASON_CODES(_,COMMA)
47 : # undef _
48 : # undef COMMA
49 : };
50 :
51 : char const *
52 : fd_quic_conn_reason_name( uint reason );
53 :
54 :
55 : struct fd_quic_conn_stream_rx {
56 : ulong rx_hi_stream_id; /* highest RX stream ID sent by peer + 4 */
57 : ulong rx_sup_stream_id; /* highest allowed RX stream ID + 4 */
58 :
59 : ulong rx_max_data; /* the limit on the number of bytes the peer is allowed to send to us */
60 : ulong rx_tot_data; /* total of all bytes received across all streams and including implied bytes */
61 : ulong rx_max_data_ackd; /* max max_data acked by peer */
62 :
63 : ulong rx_max_streams_unidir_ackd; /* value of MAX_STREAMS acked for UNIDIR */
64 :
65 : long rx_streams_active; /* FIXME: This is a user scratch field, not in use by fd_quic */
66 :
67 : /* FIXME add a TLB */
68 : };
69 :
70 : typedef struct fd_quic_conn_stream_rx fd_quic_conn_stream_rx_t;
71 :
72 : struct fd_quic_conn {
73 : uint conn_idx; /* connection index */
74 : /* connections are sized at runtime */
75 : /* storing the index avoids a division */
76 : uint conn_gen; /* generation of this connection slot */
77 :
78 : fd_quic_t * quic;
79 : void * context; /* user context */
80 :
81 : uint server : 1; /* role from self POV: 0=client, 1=server */
82 : uint established : 1; /* used by clients to determine whether to
83 : switch the destination conn id used */
84 : uint transport_params_set : 1;
85 : uint called_conn_new : 1; /* whether we need to call conn_final on teardown */
86 : uint visited : 1; /* scratch bit, no strict definition */
87 : uint key_phase : 1;
88 : uint key_update : 1;
89 :
90 : /* Service queue dlist membership. All active conns (state not INVALID)
91 : are in a service queue, FD_QUIC_SVC_TYPE_WAIT by default.
92 : Free conns (svc_type==UINT_MAX) are members of a singly linked list
93 : (only src_next set) */
94 : uint svc_type; /* FD_QUIC_SVC_{...} or UINT_MAX */
95 : uint svc_prev;
96 : uint svc_next;
97 : ulong svc_time; /* service may be delayed until this timestamp */
98 :
99 : ulong our_conn_id;
100 :
101 : /* Save original retry_source_connection_id
102 : * This is used by clients to compare against the retry_source_connection_id
103 : * in the transport parameters as specified in rfc 9000 7.3 */
104 : fd_quic_conn_id_t retry_src_conn_id;
105 :
106 : /* Host network endpoint. Used to determine src address and port */
107 : fd_quic_net_endpoint_t host;
108 :
109 : /* Peer network endpoints – have multiple connection ids and ip:port */
110 : /* TODO: footprint allows specifying conn_id_cnt but hardcoded limit used here */
111 : fd_quic_net_endpoint_t peer[1];
112 : fd_quic_conn_id_t peer_cids[1]; /* FIXME support new/retire conn ID */
113 :
114 : /* initial source connection id */
115 : ulong initial_source_conn_id;
116 :
117 : uint tx_max_datagram_sz; /* size of maximum datagram allowed by peer */
118 :
119 : /* handshake members */
120 : uint handshake_complete : 1; /* have we completed a successful handshake? */
121 : uint handshake_done_send : 1; /* do we need to send handshake-done to peer? */
122 : uint handshake_done_ackd : 1; /* was handshake_done ack'ed? */
123 : fd_quic_tls_hs_t * tls_hs;
124 :
125 : /* amount of handshake data already sent from head of queue */
126 : ulong hs_sent_bytes[4];
127 :
128 : /* amount of handshake data ack'ed by peer counted from head of queue */
129 : ulong hs_ackd_bytes[4];
130 :
131 : /* Keys for header and packet protection
132 : secrets: Contains 'master' secrets used to derive other keys
133 : keys[e][d]: Current pair of keys for each encryption level (e)
134 : and direction (d==0 is incoming, d==1 is outgoing)
135 : new_keys[e]: App keys to use for the next key update. Once app
136 : keys are available these are always kept up-to-date
137 : keys_avail: Bit set of available keys, LSB indexed by enc level */
138 : fd_quic_crypto_secrets_t secrets;
139 : fd_quic_crypto_keys_t keys[FD_QUIC_NUM_ENC_LEVELS][2];
140 : fd_quic_crypto_keys_t new_keys[2];
141 : uint keys_avail;
142 :
143 : fd_quic_stream_t send_streams[1]; /* sentinel of list of streams needing action */
144 : fd_quic_stream_t used_streams[1]; /* sentinel of list of used streams */
145 : /* invariant: an allocated stream must be in exactly one of the following lists:
146 : send_streams
147 : used_streams */
148 :
149 : /* stream id members */
150 : ulong tx_next_stream_id; /* stream ID to be used for new stream */
151 : ulong tx_sup_stream_id; /* highest allowed TX stream ID + 4 */
152 :
153 : fd_quic_stream_map_t * stream_map; /* map stream_id -> stream */
154 :
155 : /* packet number info
156 : each encryption level maps to a packet number space
157 : 0-RTT and 1-RTT both map to APPLICATION
158 : pkt_number[j] represents the minimum acceptable packet number
159 : "expected packet number"
160 : packets with a number lower than this will be dropped */
161 : ulong exp_pkt_number[3]; /* different packet number spaces:
162 : INITIAL, HANDSHAKE and APPLICATION */
163 : ulong pkt_number[3]; /* tx packet number by pn space */
164 : ulong last_pkt_number[3]; /* last (highest) packet numer seen */
165 :
166 : ushort ipv4_id; /* ipv4 id field */
167 :
168 : /* buffer to send next */
169 : /* must be at least FD_QUIC_MAX_UDP_PAYLOAD_SZ */
170 : uchar tx_buf_conn[2048];
171 : uchar * tx_ptr; /* ptr to free space in tx_buf_conn */
172 :
173 : uint state;
174 : uint reason; /* quic reason for closing. see FD_QUIC_CONN_REASON_* */
175 : uint app_reason; /* application reason for closing */
176 :
177 : fd_quic_ack_gen_t ack_gen[1];
178 : ulong unacked_sz; /* Number of received stream frame payload bytes pending ACK */
179 : /* Resets to zero when conn is rescheduled or ACKs are sent */
180 :
181 : fd_quic_pkt_meta_tracker_t pkt_meta_tracker;
182 :
183 : /* flow control */
184 : ulong tx_max_data; /* the limit on the number of bytes we are allowed
185 : to send to the peer across all streams */
186 : /* even if a bytes on a stream are not received,
187 : higher offsets received imply the usage of those bytes,
188 : and they count against the max */
189 : ulong tx_tot_data; /* total of all bytes received across all streams
190 : and including implied bytes */
191 :
192 : uint flags;
193 12177 : # define FD_QUIC_CONN_FLAGS_MAX_DATA (1u<<0u)
194 42432 : # define FD_QUIC_CONN_FLAGS_CLOSE_SENT (1u<<1u)
195 12177 : # define FD_QUIC_CONN_FLAGS_MAX_STREAMS_UNIDIR (1u<<2u)
196 36465 : # define FD_QUIC_CONN_FLAGS_PING (1u<<4u)
197 24363 : # define FD_QUIC_CONN_FLAGS_PING_SENT (1u<<5u)
198 :
199 : /* max stream data per stream type */
200 : ulong tx_initial_max_stream_data_uni;
201 :
202 : /* last tx packet num with max_data frame referring to this stream
203 : set to next_pkt_number to indicate a new max_data frame should be sent
204 : if we time out this packet (or possibly a later packet) we resend the frame
205 : and update this value */
206 : ulong upd_pkt_number;
207 :
208 : /* highest peer encryption level */
209 : uchar peer_enc_level;
210 :
211 : /* idle timeout arguments */
212 : ulong idle_timeout_ticks;
213 : ulong last_activity;
214 : ulong last_ack;
215 :
216 : /* round trip time related members */
217 : fd_rtt_estimate_t rtt[1];
218 : float rtt_period_ticks; /* bound on time between RTT measurements */
219 : float peer_ack_delay_scale; /* convert ACK delay units to ticks */
220 : float peer_max_ack_delay_ticks; /* peer max ack delay in ticks */
221 :
222 : ulong token_len;
223 : uchar token[ FD_QUIC_RETRY_MAX_TOKEN_SZ ];
224 :
225 : fd_quic_conn_stream_rx_t srx[1];
226 :
227 : ulong used_pkt_meta;
228 : };
229 :
230 : inline static void
231 : fd_quic_set_conn_state( fd_quic_conn_t * conn,
232 709896 : uint state ) {
233 709896 : conn->state = state;
234 709896 : }
235 :
236 : FD_PROTOTYPES_BEGIN
237 :
238 : FD_FN_CONST static inline ulong
239 0 : fd_quic_conn_uid( fd_quic_conn_t const * conn ) {
240 0 : return ( (ulong)conn->conn_idx << 32UL ) | ( (ulong)conn->conn_gen );
241 0 : }
242 :
243 : FD_FN_CONST static inline uint
244 0 : fd_quic_conn_uid_idx( ulong conn_uid ) {
245 0 : return (uint)( conn_uid >> 32UL );
246 0 : }
247 :
248 : FD_FN_CONST static inline uint
249 0 : fd_quic_conn_uid_gen( ulong conn_uid ) {
250 0 : return (uint)( conn_uid & 0xffffffffUL );
251 0 : }
252 :
253 : /* returns the alignment requirement of fd_quic_conn_t */
254 : FD_FN_CONST ulong
255 : fd_quic_conn_align( void );
256 :
257 : /* returns the footprint of the connection object for given limits */
258 : ulong
259 : fd_quic_conn_footprint( fd_quic_limits_t const * );
260 :
261 : /* called by fd_quic_new to initialize the connection objects
262 : used by fd_quic */
263 : fd_quic_conn_t *
264 : fd_quic_conn_new( void * mem,
265 : fd_quic_t * quic,
266 : fd_quic_limits_t const * limits );
267 :
268 : /* set the user-defined context value on the connection */
269 : void
270 : fd_quic_conn_set_context( fd_quic_conn_t * conn, void * context );
271 :
272 : /* get the user-defined context value from a connection */
273 : void *
274 : fd_quic_conn_get_context( fd_quic_conn_t * conn );
275 :
276 : FD_PROTOTYPES_END
277 :
278 : #endif /* HEADER_fd_src_waltz_quic_fd_quic_conn_h */
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