Amaury Denoyelle | 5c25dc5 | 2022-09-30 17:44:15 +0200 | [diff] [blame] | 1 | #include <arpa/inet.h> |
| 2 | #include <string.h> |
| 3 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 4 | #include <haproxy/global.h> |
| 5 | #include <haproxy/ncbuf-t.h> |
| 6 | #include <haproxy/net_helper.h> |
Frédéric Lécaille | 0aa7995 | 2023-02-03 16:15:08 +0100 | [diff] [blame] | 7 | #include <haproxy/quic_conn.h> |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 8 | #include <haproxy/quic_enc.h> |
| 9 | #include <haproxy/quic_tp.h> |
Frédéric Lécaille | c7785b5 | 2022-05-23 09:08:54 +0200 | [diff] [blame] | 10 | #include <haproxy/trace.h> |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 11 | |
| 12 | #define QUIC_MAX_UDP_PAYLOAD_SIZE 2048 |
| 13 | |
Frédéric Lécaille | c7785b5 | 2022-05-23 09:08:54 +0200 | [diff] [blame] | 14 | #define TRACE_SOURCE &trace_quic |
| 15 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 16 | /* This is the values of some QUIC transport parameters when absent. |
| 17 | * Should be used to initialize any transport parameters (local or remote) |
| 18 | * before updating them with customized values. |
| 19 | */ |
| 20 | struct quic_transport_params quic_dflt_transport_params = { |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 21 | .max_udp_payload_size = QUIC_TP_DFLT_MAX_UDP_PAYLOAD_SIZE, |
| 22 | .ack_delay_exponent = QUIC_TP_DFLT_ACK_DELAY_COMPONENT, |
| 23 | .max_ack_delay = QUIC_TP_DFLT_MAX_ACK_DELAY, |
| 24 | .active_connection_id_limit = QUIC_TP_DFLT_ACTIVE_CONNECTION_ID_LIMIT, |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 25 | }; |
| 26 | |
| 27 | /* Initialize <dst> transport parameters with default values (when absent) |
| 28 | * from <quic_dflt_transport_params>. |
| 29 | * Never fails. |
| 30 | */ |
| 31 | static void quic_dflt_transport_params_cpy(struct quic_transport_params *dst) |
| 32 | { |
| 33 | dst->max_udp_payload_size = quic_dflt_transport_params.max_udp_payload_size; |
| 34 | dst->ack_delay_exponent = quic_dflt_transport_params.ack_delay_exponent; |
| 35 | dst->max_ack_delay = quic_dflt_transport_params.max_ack_delay; |
| 36 | dst->active_connection_id_limit = quic_dflt_transport_params.active_connection_id_limit; |
| 37 | } |
| 38 | |
| 39 | /* Initialize <p> transport parameters. <server> is a boolean, set if TPs are |
| 40 | * used by a server (haproxy frontend) else this is for a client (haproxy |
| 41 | * backend). |
| 42 | * |
| 43 | * This must only be used for haproxy local parameters. To initialize peer |
| 44 | * parameters, see quic_dflt_transport_params_cpy(). |
| 45 | * |
| 46 | * Never fails. |
| 47 | */ |
| 48 | void quic_transport_params_init(struct quic_transport_params *p, int server) |
| 49 | { |
| 50 | const uint64_t ncb_size = global.tune.bufsize - NCB_RESERVED_SZ; |
Frédéric Lécaille | 2674098 | 2022-05-23 17:28:01 +0200 | [diff] [blame] | 51 | const int max_streams_bidi = global.tune.quic_frontend_max_streams_bidi; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 52 | const int max_streams_uni = 3; |
| 53 | |
| 54 | /* Set RFC default values for unspecified parameters. */ |
| 55 | quic_dflt_transport_params_cpy(p); |
| 56 | |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 57 | /* Set the max_udp_payload_size value. If not would equal to |
| 58 | * QUIC_TP_DFLT_MAX_UDP_PAYLOAD_SIZE |
| 59 | */ |
| 60 | p->max_udp_payload_size = QUIC_MAX_UDP_PAYLOAD_SIZE; |
Frédéric Lécaille | 1d96d6e | 2022-05-23 16:38:14 +0200 | [diff] [blame] | 61 | if (server) |
| 62 | p->max_idle_timeout = global.tune.quic_frontend_max_idle_timeout; |
| 63 | else |
| 64 | p->max_idle_timeout = global.tune.quic_backend_max_idle_timeout; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 65 | |
| 66 | p->initial_max_streams_bidi = max_streams_bidi; |
| 67 | p->initial_max_streams_uni = max_streams_uni; |
| 68 | p->initial_max_stream_data_bidi_local = ncb_size; |
| 69 | p->initial_max_stream_data_bidi_remote = ncb_size; |
| 70 | p->initial_max_stream_data_uni = ncb_size; |
| 71 | p->initial_max_data = (max_streams_bidi + max_streams_uni) * ncb_size; |
| 72 | |
Frédéric Lécaille | 6fc8697 | 2023-01-12 08:29:23 +0100 | [diff] [blame] | 73 | if (server) { |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 74 | p->with_stateless_reset_token = 1; |
Frédéric Lécaille | 6fc8697 | 2023-01-12 08:29:23 +0100 | [diff] [blame] | 75 | p->disable_active_migration = 1; |
| 76 | } |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 77 | |
| 78 | p->active_connection_id_limit = 8; |
| 79 | |
| 80 | p->retry_source_connection_id.len = 0; |
| 81 | } |
| 82 | |
| 83 | /* Encode <addr> preferred address transport parameter in <buf> without its |
| 84 | * "type+len" prefix. Note that the IP addresses must be encoded in network byte |
| 85 | * order. |
| 86 | * So ->ipv4_addr and ->ipv6_addr, which are buffers, must contained values |
| 87 | * already encoded in network byte order. |
| 88 | * It is the responsibility of the caller to check there is enough room in <buf> to encode |
| 89 | * this address. |
| 90 | * Never fails. |
| 91 | */ |
| 92 | static void quic_transport_param_enc_pref_addr_val(unsigned char **buf, |
| 93 | const unsigned char *end, |
| 94 | struct tp_preferred_address *addr) |
| 95 | { |
| 96 | write_n16(*buf, addr->ipv4_port); |
| 97 | *buf += sizeof addr->ipv4_port; |
| 98 | |
| 99 | memcpy(*buf, addr->ipv4_addr, sizeof addr->ipv4_addr); |
| 100 | *buf += sizeof addr->ipv4_addr; |
| 101 | |
| 102 | write_n16(*buf, addr->ipv6_port); |
| 103 | *buf += sizeof addr->ipv6_port; |
| 104 | |
| 105 | memcpy(*buf, addr->ipv6_addr, sizeof addr->ipv6_addr); |
| 106 | *buf += sizeof addr->ipv6_addr; |
| 107 | |
| 108 | *(*buf)++ = addr->cid.len; |
| 109 | if (addr->cid.len) { |
| 110 | memcpy(*buf, addr->cid.data, addr->cid.len); |
| 111 | *buf += addr->cid.len; |
| 112 | } |
| 113 | |
| 114 | memcpy(*buf, addr->stateless_reset_token, sizeof addr->stateless_reset_token); |
| 115 | *buf += sizeof addr->stateless_reset_token; |
| 116 | } |
| 117 | |
| 118 | /* Decode into <addr> preferred address transport parameter found in <*buf> buffer. |
| 119 | * Returns 1 if succeeded, 0 if not. |
| 120 | */ |
| 121 | static int quic_transport_param_dec_pref_addr(struct tp_preferred_address *addr, |
| 122 | const unsigned char **buf, |
| 123 | const unsigned char *end) |
| 124 | { |
| 125 | ssize_t addr_len; |
| 126 | |
| 127 | addr_len = sizeof addr->ipv4_port + sizeof addr->ipv4_addr; |
| 128 | addr_len += sizeof addr->ipv6_port + sizeof addr->ipv6_addr; |
| 129 | addr_len += sizeof addr->cid.len; |
| 130 | |
| 131 | if (end - *buf < addr_len) |
| 132 | return 0; |
| 133 | |
| 134 | addr->ipv4_port = read_n16(*buf); |
| 135 | *buf += sizeof addr->ipv4_port; |
| 136 | |
| 137 | memcpy(addr->ipv4_addr, *buf, sizeof addr->ipv4_addr); |
| 138 | *buf += sizeof addr->ipv4_addr; |
| 139 | |
| 140 | addr->ipv6_port = read_n16(*buf); |
| 141 | *buf += sizeof addr->ipv6_port; |
| 142 | |
| 143 | memcpy(addr->ipv6_addr, *buf, sizeof addr->ipv6_addr); |
| 144 | *buf += sizeof addr->ipv6_addr; |
| 145 | |
| 146 | addr->cid.len = *(*buf)++; |
| 147 | if (addr->cid.len) { |
| 148 | if (end - *buf > addr->cid.len || addr->cid.len > sizeof addr->cid.data) |
| 149 | return 0; |
| 150 | memcpy(addr->cid.data, *buf, addr->cid.len); |
| 151 | *buf += addr->cid.len; |
| 152 | } |
| 153 | |
| 154 | if (end - *buf != sizeof addr->stateless_reset_token) |
| 155 | return 0; |
| 156 | |
| 157 | memcpy(addr->stateless_reset_token, *buf, end - *buf); |
| 158 | *buf += sizeof addr->stateless_reset_token; |
| 159 | |
| 160 | return *buf == end; |
| 161 | } |
| 162 | |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 163 | /* Decode into <v> version information received transport parameters from <*buf> |
| 164 | * buffer. <server> must be set to 1 for QUIC clients which receive server |
| 165 | * transport parameters, and 0 for QUIC servers which receive client transport |
| 166 | * parameters. |
| 167 | * Also set the QUIC negotiated version into <tp>. |
| 168 | * Return 1 if succeeded, 0 if not. |
| 169 | */ |
| 170 | static int quic_transport_param_dec_version_info(struct tp_version_information *tp, |
| 171 | const unsigned char **buf, |
| 172 | const unsigned char *end, int server) |
| 173 | { |
| 174 | size_t tp_len = end - *buf; |
| 175 | const uint32_t *ver; |
| 176 | |
| 177 | /* <tp_len> must be a multiple of sizeof(uint32_t) */ |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 178 | if (tp_len < sizeof tp->chosen || (tp_len & 0x3)) |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 179 | return 0; |
| 180 | |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 181 | tp->chosen = ntohl(*(uint32_t *)*buf); |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 182 | /* Must not be null */ |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 183 | if (!tp->chosen) |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 184 | return 0; |
| 185 | |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 186 | *buf += sizeof tp->chosen; |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 187 | tp->others = (const uint32_t *)*buf; |
| 188 | |
| 189 | /* Others versions must not be null */ |
| 190 | for (ver = tp->others; ver < (const uint32_t *)end; ver++) { |
| 191 | if (!*ver) |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | if (server) |
| 196 | /* TODO: not supported */ |
| 197 | return 0; |
| 198 | |
Frédéric Lécaille | 4f5777a | 2022-06-20 19:39:26 +0200 | [diff] [blame] | 199 | tp->nb_others = (end - (const unsigned char *)tp->others) / sizeof *tp->others; |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 200 | for (ver = tp->others; ver < (const uint32_t *)end; ver++) { |
| 201 | if (!tp->negotiated_version) { |
| 202 | int i; |
| 203 | |
| 204 | for (i = 0; i < quic_versions_nb; i++) { |
| 205 | if (ntohl(*ver) == quic_versions[i].num) { |
| 206 | tp->negotiated_version = &quic_versions[i]; |
| 207 | break; |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | if (preferred_version && ntohl(*ver) == preferred_version->num) { |
| 213 | tp->negotiated_version = preferred_version; |
| 214 | goto out; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | out: |
| 219 | *buf = end; |
| 220 | |
| 221 | return 1; |
| 222 | } |
| 223 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 224 | /* Decode into <p> struct a transport parameter found in <*buf> buffer with |
| 225 | * <type> as type and <len> as length, depending on <server> boolean value which |
| 226 | * must be set to 1 for a server (haproxy listener) or 0 for a client (connection |
| 227 | * to an haproxy server). |
| 228 | */ |
| 229 | static int quic_transport_param_decode(struct quic_transport_params *p, |
| 230 | int server, uint64_t type, |
| 231 | const unsigned char **buf, size_t len) |
| 232 | { |
| 233 | const unsigned char *end = *buf + len; |
| 234 | |
| 235 | switch (type) { |
| 236 | case QUIC_TP_ORIGINAL_DESTINATION_CONNECTION_ID: |
| 237 | if (!server || len > sizeof p->original_destination_connection_id.data) |
| 238 | return 0; |
| 239 | |
| 240 | if (len) |
| 241 | memcpy(p->original_destination_connection_id.data, *buf, len); |
| 242 | p->original_destination_connection_id.len = len; |
| 243 | *buf += len; |
| 244 | p->original_destination_connection_id_present = 1; |
| 245 | break; |
| 246 | case QUIC_TP_INITIAL_SOURCE_CONNECTION_ID: |
| 247 | if (len > sizeof p->initial_source_connection_id.data) |
| 248 | return 0; |
| 249 | |
| 250 | if (len) |
| 251 | memcpy(p->initial_source_connection_id.data, *buf, len); |
| 252 | p->initial_source_connection_id.len = len; |
| 253 | *buf += len; |
| 254 | p->initial_source_connection_id_present = 1; |
| 255 | break; |
| 256 | case QUIC_TP_STATELESS_RESET_TOKEN: |
| 257 | if (!server || len != sizeof p->stateless_reset_token) |
| 258 | return 0; |
| 259 | memcpy(p->stateless_reset_token, *buf, len); |
| 260 | *buf += len; |
| 261 | p->with_stateless_reset_token = 1; |
| 262 | break; |
| 263 | case QUIC_TP_PREFERRED_ADDRESS: |
| 264 | if (!server) |
| 265 | return 0; |
| 266 | if (!quic_transport_param_dec_pref_addr(&p->preferred_address, buf, *buf + len)) |
| 267 | return 0; |
| 268 | p->with_preferred_address = 1; |
| 269 | break; |
| 270 | case QUIC_TP_MAX_IDLE_TIMEOUT: |
| 271 | if (!quic_dec_int(&p->max_idle_timeout, buf, end)) |
| 272 | return 0; |
| 273 | break; |
| 274 | case QUIC_TP_MAX_UDP_PAYLOAD_SIZE: |
| 275 | if (!quic_dec_int(&p->max_udp_payload_size, buf, end)) |
| 276 | return 0; |
| 277 | break; |
| 278 | case QUIC_TP_INITIAL_MAX_DATA: |
| 279 | if (!quic_dec_int(&p->initial_max_data, buf, end)) |
| 280 | return 0; |
| 281 | break; |
| 282 | case QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL: |
| 283 | if (!quic_dec_int(&p->initial_max_stream_data_bidi_local, buf, end)) |
| 284 | return 0; |
| 285 | break; |
| 286 | case QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE: |
| 287 | if (!quic_dec_int(&p->initial_max_stream_data_bidi_remote, buf, end)) |
| 288 | return 0; |
| 289 | break; |
| 290 | case QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI: |
| 291 | if (!quic_dec_int(&p->initial_max_stream_data_uni, buf, end)) |
| 292 | return 0; |
| 293 | break; |
| 294 | case QUIC_TP_INITIAL_MAX_STREAMS_BIDI: |
| 295 | if (!quic_dec_int(&p->initial_max_streams_bidi, buf, end)) |
| 296 | return 0; |
| 297 | break; |
| 298 | case QUIC_TP_INITIAL_MAX_STREAMS_UNI: |
| 299 | if (!quic_dec_int(&p->initial_max_streams_uni, buf, end)) |
| 300 | return 0; |
| 301 | break; |
| 302 | case QUIC_TP_ACK_DELAY_EXPONENT: |
| 303 | if (!quic_dec_int(&p->ack_delay_exponent, buf, end) || |
| 304 | p->ack_delay_exponent > QUIC_TP_ACK_DELAY_EXPONENT_LIMIT) |
| 305 | return 0; |
| 306 | break; |
| 307 | case QUIC_TP_MAX_ACK_DELAY: |
| 308 | if (!quic_dec_int(&p->max_ack_delay, buf, end) || |
| 309 | p->max_ack_delay > QUIC_TP_MAX_ACK_DELAY_LIMIT) |
| 310 | return 0; |
| 311 | break; |
| 312 | case QUIC_TP_DISABLE_ACTIVE_MIGRATION: |
| 313 | /* Zero-length parameter type. */ |
| 314 | if (len != 0) |
| 315 | return 0; |
| 316 | p->disable_active_migration = 1; |
| 317 | break; |
| 318 | case QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT: |
| 319 | if (!quic_dec_int(&p->active_connection_id_limit, buf, end)) |
| 320 | return 0; |
| 321 | break; |
Frédéric Lécaille | b7a406a | 2023-02-06 11:54:07 +0100 | [diff] [blame] | 322 | case QUIC_TP_VERSION_INFORMATION: |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 323 | if (!quic_transport_param_dec_version_info(&p->version_information, |
| 324 | buf, *buf + len, server)) |
| 325 | return 0; |
| 326 | break; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 327 | default: |
| 328 | *buf += len; |
| 329 | }; |
| 330 | |
| 331 | return *buf == end; |
| 332 | } |
| 333 | |
| 334 | /* Encode <type> and <len> variable length values in <buf>. |
| 335 | * Returns 1 if succeeded, 0 if not. |
| 336 | */ |
| 337 | static int quic_transport_param_encode_type_len(unsigned char **buf, |
| 338 | const unsigned char *end, |
| 339 | uint64_t type, uint64_t len) |
| 340 | { |
| 341 | return quic_enc_int(buf, end, type) && quic_enc_int(buf, end, len); |
| 342 | } |
| 343 | |
| 344 | /* Decode variable length type and length values of a QUIC transport parameter |
| 345 | * into <type> and <len> found in <*buf> buffer. |
| 346 | * Returns 1 if succeeded, 0 if not. |
| 347 | */ |
| 348 | static int quic_transport_param_decode_type_len(uint64_t *type, uint64_t *len, |
| 349 | const unsigned char **buf, |
| 350 | const unsigned char *end) |
| 351 | { |
| 352 | return quic_dec_int(type, buf, end) && quic_dec_int(len, buf, end); |
| 353 | } |
| 354 | |
| 355 | /* Encode <param> bytes stream with <type> as type and <length> as length into buf. |
| 356 | * Returns 1 if succeeded, 0 if not. |
| 357 | */ |
| 358 | static int quic_transport_param_enc_mem(unsigned char **buf, const unsigned char *end, |
| 359 | uint64_t type, void *param, uint64_t length) |
| 360 | { |
| 361 | if (!quic_transport_param_encode_type_len(buf, end, type, length)) |
| 362 | return 0; |
| 363 | |
| 364 | if (end - *buf < length) |
| 365 | return 0; |
| 366 | |
| 367 | if (length) |
| 368 | memcpy(*buf, param, length); |
| 369 | *buf += length; |
| 370 | |
| 371 | return 1; |
| 372 | } |
| 373 | |
| 374 | /* Encode <val> 64-bits value as variable length integer into <buf>. |
| 375 | * Returns 1 if succeeded, 0 if not. |
| 376 | */ |
| 377 | static int quic_transport_param_enc_int(unsigned char **buf, |
| 378 | const unsigned char *end, |
| 379 | uint64_t type, uint64_t val) |
| 380 | { |
| 381 | size_t len; |
| 382 | |
| 383 | len = quic_int_getsize(val); |
| 384 | |
| 385 | return len && quic_transport_param_encode_type_len(buf, end, type, len) && |
| 386 | quic_enc_int(buf, end, val); |
| 387 | } |
| 388 | |
| 389 | /* Returns the required length in bytes to encode <cid> QUIC connection ID. */ |
| 390 | static inline size_t sizeof_quic_cid(const struct tp_cid *cid) |
| 391 | { |
| 392 | return sizeof cid->len + cid->len; |
| 393 | } |
| 394 | |
| 395 | /* Encode <addr> preferred address into <buf>. |
| 396 | * Note that the IP addresses must be encoded in network byte order. |
| 397 | * So ->ipv4_addr and ->ipv6_addr, which are buffers, must contained |
| 398 | * values already encoded in network byte order. |
| 399 | * Returns 1 if succeeded, 0 if not. |
| 400 | */ |
| 401 | static int quic_transport_param_enc_pref_addr(unsigned char **buf, |
| 402 | const unsigned char *end, |
| 403 | struct tp_preferred_address *addr) |
| 404 | { |
| 405 | uint64_t addr_len = 0; |
| 406 | |
| 407 | addr_len += sizeof addr->ipv4_port + sizeof addr->ipv4_addr; |
| 408 | addr_len += sizeof addr->ipv6_port + sizeof addr->ipv6_addr; |
| 409 | addr_len += sizeof_quic_cid(&addr->cid); |
| 410 | addr_len += sizeof addr->stateless_reset_token; |
| 411 | |
| 412 | if (!quic_transport_param_encode_type_len(buf, end, QUIC_TP_PREFERRED_ADDRESS, addr_len)) |
| 413 | return 0; |
| 414 | |
| 415 | if (end - *buf < addr_len) |
| 416 | return 0; |
| 417 | |
| 418 | quic_transport_param_enc_pref_addr_val(buf, end, addr); |
| 419 | |
| 420 | return 1; |
| 421 | } |
| 422 | |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 423 | /* Encode version information transport parameters with <chosen_version> as chosen |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 424 | * version. |
| 425 | * Return 1 if succeeded, 0 if not. |
| 426 | */ |
| 427 | static int quic_transport_param_enc_version_info(unsigned char **buf, |
| 428 | const unsigned char *end, |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 429 | const struct quic_version *chosen_version, |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 430 | int server) |
| 431 | { |
| 432 | int i; |
| 433 | uint64_t tp_len; |
| 434 | uint32_t ver; |
| 435 | |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 436 | tp_len = sizeof chosen_version->num + quic_versions_nb * sizeof(uint32_t); |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 437 | if (!quic_transport_param_encode_type_len(buf, end, |
Frédéric Lécaille | b7a406a | 2023-02-06 11:54:07 +0100 | [diff] [blame] | 438 | QUIC_TP_VERSION_INFORMATION, |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 439 | tp_len)) |
| 440 | return 0; |
| 441 | |
| 442 | if (end - *buf < tp_len) |
| 443 | return 0; |
| 444 | |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 445 | /* First: chosen version */ |
| 446 | ver = htonl(chosen_version->num); |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 447 | memcpy(*buf, &ver, sizeof ver); |
| 448 | *buf += sizeof ver; |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 449 | /* For servers: all supported version, chosen included */ |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 450 | for (i = 0; i < quic_versions_nb; i++) { |
| 451 | ver = htonl(quic_versions[i].num); |
| 452 | memcpy(*buf, &ver, sizeof ver); |
| 453 | *buf += sizeof ver; |
| 454 | } |
| 455 | |
| 456 | return 1; |
| 457 | } |
| 458 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 459 | /* Encode <p> transport parameter into <buf> depending on <server> value which |
| 460 | * must be set to 1 for a server (haproxy listener) or 0 for a client |
| 461 | * (connection to a haproxy server). |
| 462 | * Return the number of bytes consumed if succeeded, 0 if not. |
| 463 | */ |
| 464 | int quic_transport_params_encode(unsigned char *buf, |
| 465 | const unsigned char *end, |
| 466 | struct quic_transport_params *p, |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 467 | const struct quic_version *chosen_version, |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 468 | int server) |
| 469 | { |
| 470 | unsigned char *head; |
| 471 | unsigned char *pos; |
| 472 | |
| 473 | head = pos = buf; |
| 474 | if (server) { |
| 475 | if (!quic_transport_param_enc_mem(&pos, end, |
| 476 | QUIC_TP_ORIGINAL_DESTINATION_CONNECTION_ID, |
| 477 | p->original_destination_connection_id.data, |
| 478 | p->original_destination_connection_id.len)) |
| 479 | return 0; |
| 480 | |
| 481 | if (p->retry_source_connection_id.len) { |
| 482 | if (!quic_transport_param_enc_mem(&pos, end, |
| 483 | QUIC_TP_RETRY_SOURCE_CONNECTION_ID, |
| 484 | p->retry_source_connection_id.data, |
| 485 | p->retry_source_connection_id.len)) |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | if (p->with_stateless_reset_token && |
| 490 | !quic_transport_param_enc_mem(&pos, end, QUIC_TP_STATELESS_RESET_TOKEN, |
| 491 | p->stateless_reset_token, |
| 492 | sizeof p->stateless_reset_token)) |
| 493 | return 0; |
| 494 | if (p->with_preferred_address && |
| 495 | !quic_transport_param_enc_pref_addr(&pos, end, &p->preferred_address)) |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | if (!quic_transport_param_enc_mem(&pos, end, |
| 500 | QUIC_TP_INITIAL_SOURCE_CONNECTION_ID, |
| 501 | p->initial_source_connection_id.data, |
| 502 | p->initial_source_connection_id.len)) |
| 503 | return 0; |
| 504 | |
| 505 | if (p->max_idle_timeout && |
| 506 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_MAX_IDLE_TIMEOUT, p->max_idle_timeout)) |
| 507 | return 0; |
| 508 | |
| 509 | /* |
| 510 | * "max_packet_size" transport parameter must be transmitted only if different |
| 511 | * of the default value. |
| 512 | */ |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 513 | if (p->max_udp_payload_size != QUIC_TP_DFLT_MAX_UDP_PAYLOAD_SIZE && |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 514 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_MAX_UDP_PAYLOAD_SIZE, p->max_udp_payload_size)) |
| 515 | return 0; |
| 516 | |
| 517 | if (p->initial_max_data && |
| 518 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_DATA, p->initial_max_data)) |
| 519 | return 0; |
| 520 | |
| 521 | if (p->initial_max_stream_data_bidi_local && |
| 522 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL, |
| 523 | p->initial_max_stream_data_bidi_local)) |
| 524 | return 0; |
| 525 | |
| 526 | if (p->initial_max_stream_data_bidi_remote && |
| 527 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE, |
| 528 | p->initial_max_stream_data_bidi_remote)) |
| 529 | return 0; |
| 530 | |
| 531 | if (p->initial_max_stream_data_uni && |
| 532 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI, |
| 533 | p->initial_max_stream_data_uni)) |
| 534 | return 0; |
| 535 | |
| 536 | if (p->initial_max_streams_bidi && |
| 537 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAMS_BIDI, |
| 538 | p->initial_max_streams_bidi)) |
| 539 | return 0; |
| 540 | |
| 541 | if (p->initial_max_streams_uni && |
| 542 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAMS_UNI, |
| 543 | p->initial_max_streams_uni)) |
| 544 | return 0; |
| 545 | |
| 546 | /* |
| 547 | * "ack_delay_exponent" transport parameter must be transmitted only if different |
| 548 | * of the default value. |
| 549 | */ |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 550 | if (p->ack_delay_exponent != QUIC_TP_DFLT_ACK_DELAY_COMPONENT && |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 551 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_ACK_DELAY_EXPONENT, p->ack_delay_exponent)) |
| 552 | return 0; |
| 553 | |
| 554 | /* |
| 555 | * "max_ack_delay" transport parameter must be transmitted only if different |
| 556 | * of the default value. |
| 557 | */ |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 558 | if (p->max_ack_delay != QUIC_TP_DFLT_MAX_ACK_DELAY && |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 559 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_MAX_ACK_DELAY, p->max_ack_delay)) |
| 560 | return 0; |
| 561 | |
| 562 | /* 0-length value */ |
| 563 | if (p->disable_active_migration && |
| 564 | !quic_transport_param_encode_type_len(&pos, end, QUIC_TP_DISABLE_ACTIVE_MIGRATION, 0)) |
| 565 | return 0; |
| 566 | |
| 567 | if (p->active_connection_id_limit && |
Frédéric Lécaille | aee6757 | 2022-05-23 18:29:39 +0200 | [diff] [blame] | 568 | p->active_connection_id_limit != QUIC_TP_DFLT_ACTIVE_CONNECTION_ID_LIMIT && |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 569 | !quic_transport_param_enc_int(&pos, end, QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT, |
| 570 | p->active_connection_id_limit)) |
| 571 | return 0; |
| 572 | |
Ilya Shipitsin | ace3da8 | 2022-11-01 15:46:39 +0500 | [diff] [blame] | 573 | if (!quic_transport_param_enc_version_info(&pos, end, chosen_version, server)) |
Frédéric Lécaille | 301425b | 2022-06-14 17:40:39 +0200 | [diff] [blame] | 574 | return 0; |
| 575 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 576 | return pos - head; |
| 577 | } |
| 578 | |
| 579 | /* Decode transport parameters found in <buf> buffer into <p>, depending on |
| 580 | * <server> boolean value which must be set to 1 for a server (haproxy listener) |
| 581 | * or 0 for a client (connection to a haproxy server). |
| 582 | * Returns 1 if succeeded, 0 if not. |
| 583 | */ |
| 584 | static int quic_transport_params_decode(struct quic_transport_params *p, int server, |
| 585 | const unsigned char *buf, |
| 586 | const unsigned char *end) |
| 587 | { |
| 588 | const unsigned char *pos; |
Willy Tarreau | 33a6870 | 2022-11-24 09:16:41 +0100 | [diff] [blame] | 589 | uint64_t type, len = 0; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 590 | |
| 591 | pos = buf; |
| 592 | |
| 593 | while (pos != end) { |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 594 | if (!quic_transport_param_decode_type_len(&type, &len, &pos, end)) |
| 595 | return 0; |
| 596 | |
| 597 | if (end - pos < len) |
| 598 | return 0; |
| 599 | |
| 600 | if (!quic_transport_param_decode(p, server, type, &pos, len)) |
| 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | /* |
| 605 | * A server MUST send original_destination_connection_id transport parameter. |
| 606 | * initial_source_connection_id must be present both for server and client. |
| 607 | */ |
| 608 | if ((server && !p->original_destination_connection_id_present) || |
| 609 | !p->initial_source_connection_id_present) |
| 610 | return 0; |
| 611 | |
| 612 | return 1; |
| 613 | } |
| 614 | |
| 615 | /* Store transport parameters found in <buf> buffer into <qc> QUIC connection |
| 616 | * depending on <server> value which must be 1 for a server (haproxy listener) |
| 617 | * or 0 for a client (connection to a haproxy server). |
| 618 | * Note that peer transport parameters are stored in the TX part of the connection: |
| 619 | * they are used to send packets to the peer with its transport parameters as |
| 620 | * limitations. |
| 621 | * Returns 1 if succeeded, 0 if not. |
| 622 | */ |
| 623 | int quic_transport_params_store(struct quic_conn *qc, int server, |
| 624 | const unsigned char *buf, |
| 625 | const unsigned char *end) |
| 626 | { |
| 627 | struct quic_transport_params *tx_params = &qc->tx.params; |
Frédéric Lécaille | af25a69 | 2023-02-01 17:56:57 +0100 | [diff] [blame] | 628 | struct quic_transport_params *rx_params = &qc->rx.params; |
Frédéric Lécaille | 0aa7995 | 2023-02-03 16:15:08 +0100 | [diff] [blame] | 629 | /* Initial source connection ID */ |
| 630 | struct tp_cid *iscid; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 631 | |
| 632 | /* initialize peer TPs to RFC default value */ |
| 633 | quic_dflt_transport_params_cpy(tx_params); |
| 634 | |
| 635 | if (!quic_transport_params_decode(tx_params, server, buf, end)) |
| 636 | return 0; |
| 637 | |
Frédéric Lécaille | af25a69 | 2023-02-01 17:56:57 +0100 | [diff] [blame] | 638 | /* Update the connection from transport parameters received */ |
| 639 | if (tx_params->version_information.negotiated_version && |
| 640 | tx_params->version_information.negotiated_version != qc->original_version) |
| 641 | qc->negotiated_version = |
| 642 | qc->tx.params.version_information.negotiated_version; |
| 643 | |
| 644 | if (tx_params->max_ack_delay) |
| 645 | qc->max_ack_delay = tx_params->max_ack_delay; |
| 646 | |
| 647 | if (tx_params->max_idle_timeout && rx_params->max_idle_timeout) |
| 648 | qc->max_idle_timeout = |
| 649 | QUIC_MIN(tx_params->max_idle_timeout, rx_params->max_idle_timeout); |
| 650 | else |
| 651 | qc->max_idle_timeout = |
| 652 | QUIC_MAX(tx_params->max_idle_timeout, rx_params->max_idle_timeout); |
| 653 | TRACE_PROTO("\nTX(remote) transp. params.", QUIC_EV_TRANSP_PARAMS, qc, tx_params); |
| 654 | |
Frédéric Lécaille | 0aa7995 | 2023-02-03 16:15:08 +0100 | [diff] [blame] | 655 | /* Check that the "initial_source_connection_id" transport parameter matches |
| 656 | * the SCID received which is also the DCID of the connection. |
| 657 | */ |
| 658 | iscid = &tx_params->initial_source_connection_id; |
| 659 | if (qc->dcid.len != iscid->len || |
| 660 | (qc->dcid.len && memcmp(qc->dcid.data, iscid->data, qc->dcid.len))) { |
| 661 | TRACE_PROTO("initial_source_connection_id transport parameter mismatch", |
| 662 | QUIC_EV_TRANSP_PARAMS, qc); |
| 663 | /* Kill the connection as soon as possible */ |
| 664 | qc_kill_conn(qc); |
| 665 | } |
| 666 | |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 667 | return 1; |
| 668 | } |
| 669 | |
| 670 | /* QUIC server (or haproxy listener) only function. |
| 671 | * Initialize the local transport parameters <rx_params> from <listener_params> |
Ilya Shipitsin | 4a689da | 2022-10-29 09:34:32 +0500 | [diff] [blame] | 672 | * coming from configuration and Initial packet information (destination |
| 673 | * connection ID, source connection ID, original destination connection ID) from |
Frédéric Lécaille | e9325e9 | 2022-08-11 17:24:38 +0200 | [diff] [blame] | 674 | * client token. |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 675 | * Returns 1 if succeeded, 0 if not. |
| 676 | */ |
| 677 | int qc_lstnr_params_init(struct quic_conn *qc, |
| 678 | const struct quic_transport_params *listener_params, |
| 679 | const unsigned char *stateless_reset_token, |
| 680 | const unsigned char *dcid, size_t dcidlen, |
| 681 | const unsigned char *scid, size_t scidlen, |
Frédéric Lécaille | 7629f5d | 2022-08-11 18:54:26 +0200 | [diff] [blame] | 682 | const struct quic_cid *token_odcid) |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 683 | { |
| 684 | struct quic_transport_params *rx_params = &qc->rx.params; |
| 685 | struct tp_cid *odcid_param = &rx_params->original_destination_connection_id; |
| 686 | |
| 687 | /* Copy the transport parameters. */ |
| 688 | *rx_params = *listener_params; |
| 689 | /* Copy the stateless reset token */ |
| 690 | memcpy(rx_params->stateless_reset_token, stateless_reset_token, |
| 691 | sizeof rx_params->stateless_reset_token); |
| 692 | /* Copy original_destination_connection_id transport parameter. */ |
Amaury Denoyelle | 9e3026c | 2022-10-17 11:13:07 +0200 | [diff] [blame] | 693 | if (token_odcid->len) { |
Frédéric Lécaille | 7629f5d | 2022-08-11 18:54:26 +0200 | [diff] [blame] | 694 | memcpy(odcid_param->data, token_odcid->data, token_odcid->len); |
| 695 | odcid_param->len = token_odcid->len; |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 696 | /* Copy retry_source_connection_id transport parameter. */ |
| 697 | memcpy(rx_params->retry_source_connection_id.data, dcid, dcidlen); |
| 698 | rx_params->retry_source_connection_id.len = dcidlen; |
| 699 | } |
| 700 | else { |
| 701 | memcpy(odcid_param->data, dcid, dcidlen); |
| 702 | odcid_param->len = dcidlen; |
| 703 | } |
| 704 | |
| 705 | /* Copy the initial source connection ID. */ |
| 706 | memcpy(rx_params->initial_source_connection_id.data, scid, scidlen); |
| 707 | rx_params->initial_source_connection_id.len = scidlen; |
Frédéric Lécaille | c7785b5 | 2022-05-23 09:08:54 +0200 | [diff] [blame] | 708 | TRACE_PROTO("\nRX(local) transp. params.", QUIC_EV_TRANSP_PARAMS, qc, rx_params); |
Frédéric Lécaille | 748ece6 | 2022-05-21 23:58:40 +0200 | [diff] [blame] | 709 | |
| 710 | return 1; |
| 711 | } |
| 712 | |