ssl/quic/quic_local.h

   1 /*
   2  * Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #ifndef OSSL_QUIC_LOCAL_H
  11 # define OSSL_QUIC_LOCAL_H
  12
  13 # include <openssl/ssl.h>
  14 # include "internal/quic_ssl.h"       /* QUIC_CONNECTION */
  15 # include "internal/quic_txp.h"
  16 # include "internal/quic_statm.h"
  17 # include "internal/quic_demux.h"
  18 # include "internal/quic_record_rx.h"
  19 # include "internal/quic_tls.h"
  20 # include "internal/quic_fc.h"
  21 # include "internal/quic_stream.h"
  22 # include "internal/quic_channel.h"
  23 # include "internal/quic_reactor.h"
  24 # include "internal/quic_thread_assist.h"
  25 # include "../ssl_local.h"
  26
  27 # ifndef OPENSSL_NO_QUIC
  28
  29 /*
  30  * QUIC stream SSL object (QSSO) type. This implements the API personality layer
  31  * for QSSO objects, wrapping the QUIC-native QUIC_STREAM object and tracking
  32  * state required by the libssl API personality.
  33  */
  34 struct quic_xso_st {
  35     /* SSL object common header. */
  36     struct ssl_st                   ssl;
  37
  38     /* The connection this stream is associated with. Always non-NULL. */
  39     QUIC_CONNECTION                 *conn;
  40
  41     /* The stream object. Always non-NULL for as long as the XSO exists. */
  42     QUIC_STREAM                     *stream;
  43
  44     /*
  45      * Has this stream been logically configured into blocking mode? Only
  46      * meaningful if desires_blocking_set is 1. Ignored if blocking is not
  47      * currently possible given QUIC_CONNECTION configuration.
  48      */
  49     unsigned int                    desires_blocking        : 1;
  50
  51     /*
  52      * Has SSL_set_blocking_mode been called on this stream? If not set, we
  53      * inherit from the QUIC_CONNECTION blocking state.
  54      */
  55     unsigned int                    desires_blocking_set    : 1;
  56
  57     /*
  58      * This state tracks SSL_write all-or-nothing (AON) write semantics
  59      * emulation.
  60      *
  61      * Example chronology:
  62      *
  63      *   t=0:  aon_write_in_progress=0
  64      *   t=1:  SSL_write(ssl, b1, l1) called;
  65      *         too big to enqueue into sstream at once, SSL_ERROR_WANT_WRITE;
  66      *         aon_write_in_progress=1; aon_buf_base=b1; aon_buf_len=l1;
  67      *         aon_buf_pos < l1 (depends on how much room was in sstream);
  68      *   t=2:  SSL_write(ssl, b2, l2);
  69      *         b2 must equal b1 (validated unless ACCEPT_MOVING_WRITE_BUFFER)
  70      *         l2 must equal l1 (always validated)
  71      *         append into sstream from [b2 + aon_buf_pos, b2 + aon_buf_len)
  72      *         if done, aon_write_in_progess=0
  73      *
  74      */
  75     /* Is an AON write in progress? */
  76     unsigned int                    aon_write_in_progress   : 1;
  77     /*
  78      * The base buffer pointer the caller passed us for the initial AON write
  79      * call. We use this for validation purposes unless
  80      * ACCEPT_MOVING_WRITE_BUFFER is enabled.
  81      *
  82      * NOTE: We never dereference this, as the caller might pass a different
  83      * (but identical) buffer if using ACCEPT_MOVING_WRITE_BUFFER. It is for
  84      * validation by pointer comparison only.
  85      */
  86     const unsigned char             *aon_buf_base;
  87     /* The total length of the AON buffer being sent, in bytes. */
  88     size_t                          aon_buf_len;
  89     /*
  90      * The position in the AON buffer up to which we have successfully sent data
  91      * so far.
  92      */
  93     size_t                          aon_buf_pos;
  94
  95     /* SSL_set_mode */
  96     uint32_t                        ssl_mode;
  97
  98     /* SSL_set_options */
  99     uint64_t                        ssl_options;
 100
 101     /*
 102      * Last 'normal' error during an app-level I/O operation, used by
 103      * SSL_get_error(); used to track data-path errors like SSL_ERROR_WANT_READ
 104      * and SSL_ERROR_WANT_WRITE.
 105      */
 106     int                             last_error;
 107 };
 108
 109 struct quic_conn_st {
 110     /*
 111      * ssl_st is a common header for ordinary SSL objects, QUIC connection
 112      * objects and QUIC stream objects, allowing objects of these different
 113      * types to be disambiguated at runtime and providing some common fields.
 114      *
 115      * Note: This must come first in the QUIC_CONNECTION structure.
 116      */
 117     struct ssl_st                   ssl;
 118
 119     SSL                             *tls;
 120
 121     /*
 122      * The QUIC channel providing the core QUIC connection implementation. Note
 123      * that this is not instantiated until we actually start trying to do the
 124      * handshake. This is to allow us to gather information like whether we are
 125      * going to be in client or server mode before committing to instantiating
 126      * the channel, since we want to determine the channel arguments based on
 127      * that.
 128      *
 129      * The channel remains available after connection termination until the SSL
 130      * object is freed, thus (ch != NULL) iff (started == 1).
 131      */
 132     QUIC_CHANNEL                    *ch;
 133
 134     /*
 135      * The mutex used to synchronise access to the QUIC_CHANNEL. We own this but
 136      * provide it to the channel.
 137      */
 138     CRYPTO_MUTEX                    *mutex;
 139
 140     /*
 141      * If we have a default stream attached, this is the internal XSO
 142      * object. If there is no default stream, this is NULL.
 143      */
 144     QUIC_XSO                        *default_xso;
 145
 146     /* The network read and write BIOs. */
 147     BIO                             *net_rbio, *net_wbio;
 148
 149     /* Initial peer L4 address. */
 150     BIO_ADDR                        init_peer_addr;
 151
 152 #  ifndef OPENSSL_NO_QUIC_THREAD_ASSIST
 153     /* Manages thread for QUIC thread assisted mode. */
 154     QUIC_THREAD_ASSIST              thread_assist;
 155 #  endif
 156
 157     /* If non-NULL, used instead of ossl_time_now(). Used for testing. */
 158     OSSL_TIME                       (*override_now_cb)(void *arg);
 159     void                            *override_now_cb_arg;
 160
 161     /* Number of XSOs allocated. Includes the default XSO, if any. */
 162     size_t                          num_xso;
 163
 164     /* Have we started? */
 165     unsigned int                    started                 : 1;
 166
 167     /*
 168      * This is 1 if we were instantiated using a QUIC server method
 169      * (for future use).
 170      */
 171     unsigned int                    as_server               : 1;
 172
 173     /*
 174      * Has the application called SSL_set_accept_state? We require this to be
 175      * congruent with the value of as_server.
 176      */
 177     unsigned int                    as_server_state         : 1;
 178
 179     /* Are we using thread assisted mode? Never changes after init. */
 180     unsigned int                    is_thread_assisted      : 1;
 181
 182     /* Do connection-level operations (e.g. handshakes) run in blocking mode? */
 183     unsigned int                    blocking                : 1;
 184
 185     /* Does the application want blocking mode? */
 186     unsigned int                    desires_blocking        : 1;
 187
 188     /* Have we created a default XSO yet? */
 189     unsigned int                    default_xso_created     : 1;
 190
 191     /*
 192      * Pre-TERMINATING shutdown phase in which we are flushing streams.
 193      * Monotonically transitions to 1.
 194      * New streams cannot be created in this state.
 195      */
 196     unsigned int                    shutting_down           : 1;
 197
 198     /* Have we probed the BIOs for addressing support? */
 199     unsigned int                    addressing_probe_done   : 1;
 200
 201     /* Are we using addressed mode (BIO_sendmmsg with non-NULL peer)? */
 202     unsigned int                    addressed_mode_w        : 1;
 203     unsigned int                    addressed_mode_r        : 1;
 204
 205     /* Default stream type. Defaults to SSL_DEFAULT_STREAM_MODE_AUTO_BIDI. */
 206     uint32_t                        default_stream_mode;
 207
 208     /* SSL_set_mode. This is not used directly but inherited by new XSOs. */
 209     uint32_t                        default_ssl_mode;
 210
 211     /* SSL_set_options. This is not used directly but inherited by new XSOs. */
 212     uint64_t                        default_ssl_options;
 213
 214     /* SSL_set_incoming_stream_policy. */
 215     int                             incoming_stream_policy;
 216     uint64_t                        incoming_stream_aec;
 217
 218     /*
 219      * Last 'normal' error during an app-level I/O operation, used by
 220      * SSL_get_error(); used to track data-path errors like SSL_ERROR_WANT_READ
 221      * and SSL_ERROR_WANT_WRITE.
 222      */
 223     int                             last_error;
 224 };
 225
 226 /* Internal calls to the QUIC CSM which come from various places. */
 227 int ossl_quic_conn_on_handshake_confirmed(QUIC_CONNECTION *qc);
 228
 229 /*
 230  * To be called when a protocol violation occurs. The connection is torn down
 231  * with the given error code, which should be a QUIC_ERR_* value. Reason string
 232  * is optional and copied if provided. frame_type should be 0 if not applicable.
 233  */
 234 void ossl_quic_conn_raise_protocol_error(QUIC_CONNECTION *qc,
 235                                          uint64_t error_code,
 236                                          uint64_t frame_type,
 237                                          const char *reason);
 238
 239 void ossl_quic_conn_on_remote_conn_close(QUIC_CONNECTION *qc,
 240                                          OSSL_QUIC_FRAME_CONN_CLOSE *f);
 241
 242 int ossl_quic_trace(int write_p, int version, int content_type,
 243                     const void *buf, size_t msglen, SSL *ssl, void *arg);
 244
 245 #  define OSSL_QUIC_ANY_VERSION 0xFFFFF
 246 #  define IS_QUIC_METHOD(m) \
 247     ((m) == OSSL_QUIC_client_method() || \
 248      (m) == OSSL_QUIC_client_thread_method())
 249 #  define IS_QUIC_CTX(ctx)          IS_QUIC_METHOD((ctx)->method)
 250
 251 #  define QUIC_CONNECTION_FROM_SSL_int(ssl, c)   \
 252      ((ssl) == NULL ? NULL                       \
 253       : ((ssl)->type == SSL_TYPE_QUIC_CONNECTION \
 254          ? (c QUIC_CONNECTION *)(ssl)            \
 255          : NULL))
 256
 257 #  define QUIC_XSO_FROM_SSL_int(ssl, c)                             \
 258     ((ssl) == NULL                                                  \
 259      ? NULL                                                         \
 260      : (((ssl)->type == SSL_TYPE_QUIC_XSO                           \
 261         ? (c QUIC_XSO *)(ssl)                                       \
 262         : ((ssl)->type == SSL_TYPE_QUIC_CONNECTION                  \
 263            ? (c QUIC_XSO *)((QUIC_CONNECTION *)(ssl))->default_xso  \
 264            : NULL))))
 265
 266 #  define SSL_CONNECTION_FROM_QUIC_SSL_int(ssl, c)               \
 267      ((ssl) == NULL ? NULL                                       \
 268       : ((ssl)->type == SSL_TYPE_QUIC_CONNECTION                 \
 269          ? (c SSL_CONNECTION *)((c QUIC_CONNECTION *)(ssl))->tls \
 270          : NULL))
 271
 272 #  define IS_QUIC(ssl) ((ssl) != NULL                                   \
 273                         && ((ssl)->type == SSL_TYPE_QUIC_CONNECTION     \
 274                             || (ssl)->type == SSL_TYPE_QUIC_XSO))
 275 # else
 276 #  define QUIC_CONNECTION_FROM_SSL_int(ssl, c) NULL
 277 #  define QUIC_XSO_FROM_SSL_int(ssl, c) NULL
 278 #  define SSL_CONNECTION_FROM_QUIC_SSL_int(ssl, c) NULL
 279 #  define IS_QUIC(ssl) 0
 280 #  define IS_QUIC_CTX(ctx) 0
 281 #  define IS_QUIC_METHOD(m) 0
 282 # endif
 283
 284 # define QUIC_CONNECTION_FROM_SSL(ssl) \
 285     QUIC_CONNECTION_FROM_SSL_int(ssl, SSL_CONNECTION_NO_CONST)
 286 # define QUIC_CONNECTION_FROM_CONST_SSL(ssl) \
 287     QUIC_CONNECTION_FROM_SSL_int(ssl, const)
 288 # define QUIC_XSO_FROM_SSL(ssl) \
 289     QUIC_XSO_FROM_SSL_int(ssl, SSL_CONNECTION_NO_CONST)
 290 # define QUIC_XSO_FROM_CONST_SSL(ssl) \
 291     QUIC_XSO_FROM_SSL_int(ssl, const)
 292 # define SSL_CONNECTION_FROM_QUIC_SSL(ssl) \
 293     SSL_CONNECTION_FROM_QUIC_SSL_int(ssl, SSL_CONNECTION_NO_CONST)
 294 # define SSL_CONNECTION_FROM_CONST_QUIC_SSL(ssl) \
 295     SSL_CONNECTION_FROM_CONST_QUIC_SSL_int(ssl, const)
 296
 297 # define IMPLEMENT_quic_meth_func(version, func_name, q_accept, \
 298                                  q_connect, enc_data) \
 299 const SSL_METHOD *func_name(void)  \
 300         { \
 301         static const SSL_METHOD func_name##_data= { \
 302                 version, \
 303                 0, \
 304                 0, \
 305                 ossl_quic_new, \
 306                 ossl_quic_free, \
 307                 ossl_quic_reset, \
 308                 ossl_quic_init, \
 309                 NULL /* clear */, \
 310                 ossl_quic_deinit, \
 311                 q_accept, \
 312                 q_connect, \
 313                 ossl_quic_read, \
 314                 ossl_quic_peek, \
 315                 ossl_quic_write, \
 316                 NULL /* shutdown */, \
 317                 NULL /* renegotiate */, \
 318                 ossl_quic_renegotiate_check, \
 319                 NULL /* read_bytes */, \
 320                 NULL /* write_bytes */, \
 321                 NULL /* dispatch_alert */, \
 322                 ossl_quic_ctrl, \
 323                 ossl_quic_ctx_ctrl, \
 324                 ossl_quic_get_cipher_by_char, \
 325                 NULL /* put_cipher_by_char */, \
 326                 ossl_quic_pending, \
 327                 ossl_quic_num_ciphers, \
 328                 ossl_quic_get_cipher, \
 329                 tls1_default_timeout, \
 330                 &enc_data, \
 331                 ssl_undefined_void_function, \
 332                 ossl_quic_callback_ctrl, \
 333                 ossl_quic_ctx_callback_ctrl, \
 334         }; \
 335         return &func_name##_data; \
 336         }
 337
 338 #endif