| File: | out/../deps/ngtcp2/ngtcp2/lib/ngtcp2_pkt.c |
| Warning: | line 1346, column 3 Value stored to 'p' is never read |
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| 1 | /* |
| 2 | * ngtcp2 |
| 3 | * |
| 4 | * Copyright (c) 2017 ngtcp2 contributors |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining |
| 7 | * a copy of this software and associated documentation files (the |
| 8 | * "Software"), to deal in the Software without restriction, including |
| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
| 10 | * distribute, sublicense, and/or sell copies of the Software, and to |
| 11 | * permit persons to whom the Software is furnished to do so, subject to |
| 12 | * the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be |
| 15 | * included in all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 20 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| 21 | * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| 22 | * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| 23 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 24 | */ |
| 25 | #include "ngtcp2_pkt.h" |
| 26 | |
| 27 | #include <assert.h> |
| 28 | #include <string.h> |
| 29 | #include <stdio.h> |
| 30 | |
| 31 | #include "ngtcp2_conv.h" |
| 32 | #include "ngtcp2_str.h" |
| 33 | #include "ngtcp2_macro.h" |
| 34 | #include "ngtcp2_cid.h" |
| 35 | #include "ngtcp2_mem.h" |
| 36 | #include "ngtcp2_vec.h" |
| 37 | |
| 38 | int ngtcp2_pkt_chain_new(ngtcp2_pkt_chain **ppc, const ngtcp2_path *path, |
| 39 | const ngtcp2_pkt_info *pi, const uint8_t *pkt, |
| 40 | size_t pktlen, size_t dgramlen, ngtcp2_tstamp ts, |
| 41 | const ngtcp2_mem *mem) { |
| 42 | *ppc = ngtcp2_mem_malloc(mem, sizeof(ngtcp2_pkt_chain) + pktlen); |
| 43 | if (*ppc == NULL((void*)0)) { |
| 44 | return NGTCP2_ERR_NOMEM-501; |
| 45 | } |
| 46 | |
| 47 | ngtcp2_path_storage_init2(&(*ppc)->path, path); |
| 48 | (*ppc)->pi = *pi; |
| 49 | (*ppc)->next = NULL((void*)0); |
| 50 | (*ppc)->pkt = (uint8_t *)(*ppc) + sizeof(ngtcp2_pkt_chain); |
| 51 | (*ppc)->pktlen = pktlen; |
| 52 | (*ppc)->dgramlen = dgramlen; |
| 53 | (*ppc)->ts = ts; |
| 54 | |
| 55 | memcpy((*ppc)->pkt, pkt, pktlen); |
| 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | void ngtcp2_pkt_chain_del(ngtcp2_pkt_chain *pc, const ngtcp2_mem *mem) { |
| 61 | ngtcp2_mem_free(mem, pc); |
| 62 | } |
| 63 | |
| 64 | int ngtcp2_pkt_decode_version_cid(uint32_t *pversion, const uint8_t **pdcid, |
| 65 | size_t *pdcidlen, const uint8_t **pscid, |
| 66 | size_t *pscidlen, const uint8_t *data, |
| 67 | size_t datalen, size_t short_dcidlen) { |
| 68 | size_t len; |
| 69 | uint32_t version; |
| 70 | size_t dcidlen, scidlen; |
| 71 | |
| 72 | assert(datalen)((void) (0)); |
| 73 | |
| 74 | if (data[0] & NGTCP2_HEADER_FORM_BIT0x80) { |
| 75 | /* 1 byte (Header Form, Fixed Bit, Long Packet Type, Type-Specific bits) |
| 76 | * 4 bytes Version |
| 77 | * 1 byte DCID Length |
| 78 | * 1 byte SCID Length |
| 79 | */ |
| 80 | len = 1 + 4 + 1 + 1; |
| 81 | if (datalen < len) { |
| 82 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 83 | } |
| 84 | |
| 85 | dcidlen = data[5]; |
| 86 | len += dcidlen; |
| 87 | if (datalen < len) { |
| 88 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 89 | } |
| 90 | scidlen = data[5 + 1 + dcidlen]; |
| 91 | len += scidlen; |
| 92 | if (datalen < len) { |
| 93 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 94 | } |
| 95 | |
| 96 | version = ngtcp2_get_uint32(&data[1]); |
| 97 | |
| 98 | if ((version == 0 || version == NGTCP2_PROTO_VER_V10x00000001u || |
| 99 | (NGTCP2_PROTO_VER_DRAFT_MIN0xff00001du <= version && |
| 100 | version <= NGTCP2_PROTO_VER_DRAFT_MAX0xff000020u)) && |
| 101 | (dcidlen > NGTCP2_MAX_CIDLEN20 || scidlen > NGTCP2_MAX_CIDLEN20)) { |
| 102 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 103 | } |
| 104 | |
| 105 | *pversion = version; |
| 106 | *pdcid = &data[6]; |
| 107 | *pdcidlen = dcidlen; |
| 108 | *pscid = &data[6 + dcidlen + 1]; |
| 109 | *pscidlen = scidlen; |
| 110 | |
| 111 | if (version && version != NGTCP2_PROTO_VER_V10x00000001u && |
| 112 | (version < NGTCP2_PROTO_VER_DRAFT_MIN0xff00001du || |
| 113 | NGTCP2_PROTO_VER_DRAFT_MAX0xff000020u < version)) { |
| 114 | return 1; |
| 115 | } |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | assert(short_dcidlen <= NGTCP2_MAX_CIDLEN)((void) (0)); |
| 120 | |
| 121 | len = 1 + short_dcidlen; |
| 122 | if (datalen < len) { |
| 123 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 124 | } |
| 125 | |
| 126 | *pversion = 0; |
| 127 | *pdcid = &data[1]; |
| 128 | *pdcidlen = short_dcidlen; |
| 129 | *pscid = NULL((void*)0); |
| 130 | *pscidlen = 0; |
| 131 | |
| 132 | return 0; |
| 133 | } |
| 134 | |
| 135 | void ngtcp2_pkt_hd_init(ngtcp2_pkt_hd *hd, uint8_t flags, uint8_t type, |
| 136 | const ngtcp2_cid *dcid, const ngtcp2_cid *scid, |
| 137 | int64_t pkt_num, size_t pkt_numlen, uint32_t version, |
| 138 | size_t len) { |
| 139 | hd->flags = flags; |
| 140 | hd->type = type; |
| 141 | if (dcid) { |
| 142 | hd->dcid = *dcid; |
| 143 | } else { |
| 144 | ngtcp2_cid_zero(&hd->dcid); |
| 145 | } |
| 146 | if (scid) { |
| 147 | hd->scid = *scid; |
| 148 | } else { |
| 149 | ngtcp2_cid_zero(&hd->scid); |
| 150 | } |
| 151 | hd->pkt_num = pkt_num; |
| 152 | hd->token.base = NULL((void*)0); |
| 153 | hd->token.len = 0; |
| 154 | hd->pkt_numlen = pkt_numlen; |
| 155 | hd->version = version; |
| 156 | hd->len = len; |
| 157 | } |
| 158 | |
| 159 | static int has_mask(uint8_t b, uint8_t mask) { return (b & mask) == mask; } |
| 160 | |
| 161 | ngtcp2_ssize ngtcp2_pkt_decode_hd_long(ngtcp2_pkt_hd *dest, const uint8_t *pkt, |
| 162 | size_t pktlen) { |
| 163 | uint8_t type; |
| 164 | uint32_t version; |
| 165 | size_t dcil, scil; |
| 166 | const uint8_t *p; |
| 167 | size_t len = 0; |
| 168 | size_t n; |
| 169 | size_t ntokenlen = 0; |
| 170 | const uint8_t *token = NULL((void*)0); |
| 171 | size_t tokenlen = 0; |
| 172 | uint64_t vi; |
| 173 | |
| 174 | if (pktlen < 5) { |
| 175 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 176 | } |
| 177 | |
| 178 | if (!(pkt[0] & NGTCP2_HEADER_FORM_BIT0x80)) { |
| 179 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 180 | } |
| 181 | |
| 182 | version = ngtcp2_get_uint32(&pkt[1]); |
| 183 | |
| 184 | if (version == 0) { |
| 185 | type = NGTCP2_PKT_VERSION_NEGOTIATION; |
| 186 | /* This must be Version Negotiation packet which lacks packet |
| 187 | number and payload length fields. */ |
| 188 | len = 5 + 2; |
| 189 | } else { |
| 190 | if (!(pkt[0] & NGTCP2_FIXED_BIT_MASK0x40)) { |
| 191 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 192 | } |
| 193 | |
| 194 | type = ngtcp2_pkt_get_type_long(pkt[0]); |
| 195 | switch (type) { |
| 196 | case NGTCP2_PKT_INITIAL: |
| 197 | len = 1 /* Token Length */ + NGTCP2_MIN_LONG_HEADERLEN(1 + 4 + 1 + 1 + 1 + 1) - |
| 198 | 1; /* Cut packet number field */ |
| 199 | break; |
| 200 | case NGTCP2_PKT_RETRY: |
| 201 | /* Retry packet does not have packet number and length fields */ |
| 202 | len = 5 + 2; |
| 203 | break; |
| 204 | case NGTCP2_PKT_HANDSHAKE: |
| 205 | case NGTCP2_PKT_0RTT: |
| 206 | len = NGTCP2_MIN_LONG_HEADERLEN(1 + 4 + 1 + 1 + 1 + 1) - 1; /* Cut packet number field */ |
| 207 | break; |
| 208 | default: |
| 209 | /* Unreachable */ |
| 210 | assert(0)((void) (0)); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | if (pktlen < len) { |
| 215 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 216 | } |
| 217 | |
| 218 | p = &pkt[5]; |
| 219 | dcil = *p; |
| 220 | if (dcil > NGTCP2_MAX_CIDLEN20) { |
| 221 | /* QUIC v1 implementation never expect to receive CID length more |
| 222 | than NGTCP2_MAX_CIDLEN. */ |
| 223 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 224 | } |
| 225 | len += dcil; |
| 226 | |
| 227 | if (pktlen < len) { |
| 228 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 229 | } |
| 230 | |
| 231 | p += 1 + dcil; |
| 232 | scil = *p; |
| 233 | if (scil > NGTCP2_MAX_CIDLEN20) { |
| 234 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 235 | } |
| 236 | len += scil; |
| 237 | |
| 238 | if (pktlen < len) { |
| 239 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 240 | } |
| 241 | |
| 242 | p += 1 + scil; |
| 243 | |
| 244 | if (type == NGTCP2_PKT_INITIAL) { |
| 245 | /* Token Length */ |
| 246 | ntokenlen = ngtcp2_get_varint_len(p); |
| 247 | len += ntokenlen - 1; |
| 248 | |
| 249 | if (pktlen < len) { |
| 250 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 251 | } |
| 252 | |
| 253 | vi = ngtcp2_get_varint(&ntokenlen, p); |
| 254 | if (pktlen - len < vi) { |
| 255 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 256 | } |
| 257 | tokenlen = (size_t)vi; |
| 258 | len += tokenlen; |
| 259 | |
| 260 | p += ntokenlen; |
| 261 | |
| 262 | if (tokenlen) { |
| 263 | token = p; |
| 264 | } |
| 265 | |
| 266 | p += tokenlen; |
| 267 | } |
| 268 | |
| 269 | switch (type) { |
| 270 | case NGTCP2_PKT_VERSION_NEGOTIATION: |
| 271 | case NGTCP2_PKT_RETRY: |
| 272 | break; |
| 273 | default: |
| 274 | /* Length */ |
| 275 | n = ngtcp2_get_varint_len(p); |
| 276 | len += n - 1; |
| 277 | |
| 278 | if (pktlen < len) { |
| 279 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | dest->flags = NGTCP2_PKT_FLAG_LONG_FORM0x01; |
| 284 | dest->type = type; |
| 285 | dest->version = version; |
| 286 | dest->pkt_num = 0; |
| 287 | dest->pkt_numlen = 0; |
| 288 | |
| 289 | p = &pkt[6]; |
| 290 | ngtcp2_cid_init(&dest->dcid, p, dcil); |
| 291 | p += dcil + 1; |
| 292 | ngtcp2_cid_init(&dest->scid, p, scil); |
| 293 | p += scil; |
| 294 | |
| 295 | dest->token.base = (uint8_t *)token; |
| 296 | dest->token.len = tokenlen; |
| 297 | p += ntokenlen + tokenlen; |
| 298 | |
| 299 | switch (type) { |
| 300 | case NGTCP2_PKT_VERSION_NEGOTIATION: |
| 301 | case NGTCP2_PKT_RETRY: |
| 302 | dest->len = 0; |
| 303 | break; |
| 304 | default: |
| 305 | vi = ngtcp2_get_varint(&n, p); |
| 306 | if (vi > SIZE_MAX(18446744073709551615UL)) { |
| 307 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 308 | } |
| 309 | dest->len = (size_t)vi; |
| 310 | p += n; |
| 311 | } |
| 312 | |
| 313 | assert((size_t)(p - pkt) == len)((void) (0)); |
| 314 | |
| 315 | return (ngtcp2_ssize)len; |
| 316 | } |
| 317 | |
| 318 | ngtcp2_ssize ngtcp2_pkt_decode_hd_short(ngtcp2_pkt_hd *dest, const uint8_t *pkt, |
| 319 | size_t pktlen, size_t dcidlen) { |
| 320 | size_t len = 1 + dcidlen; |
| 321 | const uint8_t *p = pkt; |
| 322 | |
| 323 | assert(dcidlen <= NGTCP2_MAX_CIDLEN)((void) (0)); |
| 324 | |
| 325 | if (pktlen < len) { |
| 326 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 327 | } |
| 328 | |
| 329 | if ((pkt[0] & NGTCP2_HEADER_FORM_BIT0x80) || |
| 330 | (pkt[0] & NGTCP2_FIXED_BIT_MASK0x40) == 0) { |
| 331 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 332 | } |
| 333 | |
| 334 | p = &pkt[1]; |
| 335 | |
| 336 | dest->type = NGTCP2_PKT_SHORT; |
| 337 | |
| 338 | ngtcp2_cid_init(&dest->dcid, p, dcidlen); |
| 339 | p += dcidlen; |
| 340 | |
| 341 | /* Set 0 to SCID so that we don't accidentally reference it and gets |
| 342 | garbage. */ |
| 343 | ngtcp2_cid_zero(&dest->scid); |
| 344 | |
| 345 | dest->flags = NGTCP2_PKT_FLAG_NONE0; |
| 346 | dest->version = 0; |
| 347 | dest->len = 0; |
| 348 | dest->pkt_num = 0; |
| 349 | dest->pkt_numlen = 0; |
| 350 | |
| 351 | assert((size_t)(p - pkt) == len)((void) (0)); |
| 352 | |
| 353 | return (ngtcp2_ssize)len; |
| 354 | } |
| 355 | |
| 356 | ngtcp2_ssize ngtcp2_pkt_encode_hd_long(uint8_t *out, size_t outlen, |
| 357 | const ngtcp2_pkt_hd *hd) { |
| 358 | uint8_t *p; |
| 359 | size_t len = NGTCP2_MIN_LONG_HEADERLEN(1 + 4 + 1 + 1 + 1 + 1) + hd->dcid.datalen + hd->scid.datalen - |
| 360 | 2; /* NGTCP2_MIN_LONG_HEADERLEN includes 1 byte for |
| 361 | len and 1 byte for packet number. */ |
| 362 | |
| 363 | if (hd->type != NGTCP2_PKT_RETRY) { |
| 364 | len += 2 /* Length */ + hd->pkt_numlen; |
| 365 | } |
| 366 | |
| 367 | if (hd->type == NGTCP2_PKT_INITIAL) { |
| 368 | len += ngtcp2_put_varint_len(hd->token.len) + hd->token.len; |
| 369 | } |
| 370 | |
| 371 | if (outlen < len) { |
| 372 | return NGTCP2_ERR_NOBUF-203; |
| 373 | } |
| 374 | |
| 375 | p = out; |
| 376 | |
| 377 | *p++ = (uint8_t)(NGTCP2_HEADER_FORM_BIT0x80 | NGTCP2_FIXED_BIT_MASK0x40 | |
| 378 | (hd->type << 4) | (uint8_t)(hd->pkt_numlen - 1)); |
| 379 | p = ngtcp2_put_uint32be(p, hd->version); |
| 380 | *p++ = (uint8_t)hd->dcid.datalen; |
| 381 | if (hd->dcid.datalen) { |
| 382 | p = ngtcp2_cpymem(p, hd->dcid.data, hd->dcid.datalen); |
| 383 | } |
| 384 | *p++ = (uint8_t)hd->scid.datalen; |
| 385 | if (hd->scid.datalen) { |
| 386 | p = ngtcp2_cpymem(p, hd->scid.data, hd->scid.datalen); |
| 387 | } |
| 388 | |
| 389 | if (hd->type == NGTCP2_PKT_INITIAL) { |
| 390 | p = ngtcp2_put_varint(p, hd->token.len); |
| 391 | if (hd->token.len) { |
| 392 | p = ngtcp2_cpymem(p, hd->token.base, hd->token.len); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | if (hd->type != NGTCP2_PKT_RETRY) { |
| 397 | p = ngtcp2_put_varint14(p, (uint16_t)hd->len); |
| 398 | p = ngtcp2_put_pkt_num(p, hd->pkt_num, hd->pkt_numlen); |
| 399 | } |
| 400 | |
| 401 | assert((size_t)(p - out) == len)((void) (0)); |
| 402 | |
| 403 | return (ngtcp2_ssize)len; |
| 404 | } |
| 405 | |
| 406 | ngtcp2_ssize ngtcp2_pkt_encode_hd_short(uint8_t *out, size_t outlen, |
| 407 | const ngtcp2_pkt_hd *hd) { |
| 408 | uint8_t *p; |
| 409 | size_t len = 1 + hd->dcid.datalen + hd->pkt_numlen; |
| 410 | |
| 411 | if (outlen < len) { |
| 412 | return NGTCP2_ERR_NOBUF-203; |
| 413 | } |
| 414 | |
| 415 | p = out; |
| 416 | |
| 417 | *p = NGTCP2_FIXED_BIT_MASK0x40 | (uint8_t)(hd->pkt_numlen - 1); |
| 418 | if (hd->flags & NGTCP2_PKT_FLAG_KEY_PHASE0x04) { |
| 419 | *p |= NGTCP2_SHORT_KEY_PHASE_BIT0x04; |
| 420 | } |
| 421 | |
| 422 | ++p; |
| 423 | |
| 424 | if (hd->dcid.datalen) { |
| 425 | p = ngtcp2_cpymem(p, hd->dcid.data, hd->dcid.datalen); |
| 426 | } |
| 427 | |
| 428 | p = ngtcp2_put_pkt_num(p, hd->pkt_num, hd->pkt_numlen); |
| 429 | |
| 430 | assert((size_t)(p - out) == len)((void) (0)); |
| 431 | |
| 432 | return (ngtcp2_ssize)len; |
| 433 | } |
| 434 | |
| 435 | ngtcp2_ssize ngtcp2_pkt_decode_frame(ngtcp2_frame *dest, const uint8_t *payload, |
| 436 | size_t payloadlen) { |
| 437 | uint8_t type; |
| 438 | |
| 439 | if (payloadlen == 0) { |
| 440 | return 0; |
| 441 | } |
| 442 | |
| 443 | type = payload[0]; |
| 444 | |
| 445 | switch (type) { |
| 446 | case NGTCP2_FRAME_PADDING: |
| 447 | return (ngtcp2_ssize)ngtcp2_pkt_decode_padding_frame(&dest->padding, |
| 448 | payload, payloadlen); |
| 449 | case NGTCP2_FRAME_RESET_STREAM: |
| 450 | return ngtcp2_pkt_decode_reset_stream_frame(&dest->reset_stream, payload, |
| 451 | payloadlen); |
| 452 | case NGTCP2_FRAME_CONNECTION_CLOSE: |
| 453 | case NGTCP2_FRAME_CONNECTION_CLOSE_APP: |
| 454 | return ngtcp2_pkt_decode_connection_close_frame(&dest->connection_close, |
| 455 | payload, payloadlen); |
| 456 | case NGTCP2_FRAME_MAX_DATA: |
| 457 | return ngtcp2_pkt_decode_max_data_frame(&dest->max_data, payload, |
| 458 | payloadlen); |
| 459 | case NGTCP2_FRAME_MAX_STREAM_DATA: |
| 460 | return ngtcp2_pkt_decode_max_stream_data_frame(&dest->max_stream_data, |
| 461 | payload, payloadlen); |
| 462 | case NGTCP2_FRAME_MAX_STREAMS_BIDI: |
| 463 | case NGTCP2_FRAME_MAX_STREAMS_UNI: |
| 464 | return ngtcp2_pkt_decode_max_streams_frame(&dest->max_streams, payload, |
| 465 | payloadlen); |
| 466 | case NGTCP2_FRAME_PING: |
| 467 | return ngtcp2_pkt_decode_ping_frame(&dest->ping, payload, payloadlen); |
| 468 | case NGTCP2_FRAME_DATA_BLOCKED: |
| 469 | return ngtcp2_pkt_decode_data_blocked_frame(&dest->data_blocked, payload, |
| 470 | payloadlen); |
| 471 | case NGTCP2_FRAME_STREAM_DATA_BLOCKED: |
| 472 | return ngtcp2_pkt_decode_stream_data_blocked_frame( |
| 473 | &dest->stream_data_blocked, payload, payloadlen); |
| 474 | case NGTCP2_FRAME_STREAMS_BLOCKED_BIDI: |
| 475 | case NGTCP2_FRAME_STREAMS_BLOCKED_UNI: |
| 476 | return ngtcp2_pkt_decode_streams_blocked_frame(&dest->streams_blocked, |
| 477 | payload, payloadlen); |
| 478 | case NGTCP2_FRAME_NEW_CONNECTION_ID: |
| 479 | return ngtcp2_pkt_decode_new_connection_id_frame(&dest->new_connection_id, |
| 480 | payload, payloadlen); |
| 481 | case NGTCP2_FRAME_STOP_SENDING: |
| 482 | return ngtcp2_pkt_decode_stop_sending_frame(&dest->stop_sending, payload, |
| 483 | payloadlen); |
| 484 | case NGTCP2_FRAME_ACK: |
| 485 | case NGTCP2_FRAME_ACK_ECN: |
| 486 | return ngtcp2_pkt_decode_ack_frame(&dest->ack, payload, payloadlen); |
| 487 | case NGTCP2_FRAME_PATH_CHALLENGE: |
| 488 | return ngtcp2_pkt_decode_path_challenge_frame(&dest->path_challenge, |
| 489 | payload, payloadlen); |
| 490 | case NGTCP2_FRAME_PATH_RESPONSE: |
| 491 | return ngtcp2_pkt_decode_path_response_frame(&dest->path_response, payload, |
| 492 | payloadlen); |
| 493 | case NGTCP2_FRAME_CRYPTO: |
| 494 | return ngtcp2_pkt_decode_crypto_frame(&dest->crypto, payload, payloadlen); |
| 495 | case NGTCP2_FRAME_NEW_TOKEN: |
| 496 | return ngtcp2_pkt_decode_new_token_frame(&dest->new_token, payload, |
| 497 | payloadlen); |
| 498 | case NGTCP2_FRAME_RETIRE_CONNECTION_ID: |
| 499 | return ngtcp2_pkt_decode_retire_connection_id_frame( |
| 500 | &dest->retire_connection_id, payload, payloadlen); |
| 501 | case NGTCP2_FRAME_HANDSHAKE_DONE: |
| 502 | return ngtcp2_pkt_decode_handshake_done_frame(&dest->handshake_done, |
| 503 | payload, payloadlen); |
| 504 | case NGTCP2_FRAME_DATAGRAM: |
| 505 | case NGTCP2_FRAME_DATAGRAM_LEN: |
| 506 | return ngtcp2_pkt_decode_datagram_frame(&dest->datagram, payload, |
| 507 | payloadlen); |
| 508 | default: |
| 509 | if (has_mask(type, NGTCP2_FRAME_STREAM)) { |
| 510 | return ngtcp2_pkt_decode_stream_frame(&dest->stream, payload, payloadlen); |
| 511 | } |
| 512 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | ngtcp2_ssize ngtcp2_pkt_decode_stream_frame(ngtcp2_stream *dest, |
| 517 | const uint8_t *payload, |
| 518 | size_t payloadlen) { |
| 519 | uint8_t type; |
| 520 | size_t len = 1 + 1; |
| 521 | const uint8_t *p; |
| 522 | size_t datalen; |
| 523 | size_t ndatalen = 0; |
| 524 | size_t n; |
| 525 | uint64_t vi; |
| 526 | |
| 527 | if (payloadlen < len) { |
| 528 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 529 | } |
| 530 | |
| 531 | type = payload[0]; |
| 532 | |
| 533 | p = payload + 1; |
| 534 | |
| 535 | n = ngtcp2_get_varint_len(p); |
| 536 | len += n - 1; |
| 537 | |
| 538 | if (payloadlen < len) { |
| 539 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 540 | } |
| 541 | |
| 542 | p += n; |
| 543 | |
| 544 | if (type & NGTCP2_STREAM_OFF_BIT0x04) { |
| 545 | ++len; |
| 546 | if (payloadlen < len) { |
| 547 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 548 | } |
| 549 | |
| 550 | n = ngtcp2_get_varint_len(p); |
| 551 | len += n - 1; |
| 552 | |
| 553 | if (payloadlen < len) { |
| 554 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 555 | } |
| 556 | |
| 557 | p += n; |
| 558 | } |
| 559 | |
| 560 | if (type & NGTCP2_STREAM_LEN_BIT0x02) { |
| 561 | ++len; |
| 562 | if (payloadlen < len) { |
| 563 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 564 | } |
| 565 | |
| 566 | ndatalen = ngtcp2_get_varint_len(p); |
| 567 | len += ndatalen - 1; |
| 568 | |
| 569 | if (payloadlen < len) { |
| 570 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 571 | } |
| 572 | |
| 573 | vi = ngtcp2_get_varint(&ndatalen, p); |
| 574 | if (payloadlen - len < vi) { |
| 575 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 576 | } |
| 577 | datalen = (size_t)vi; |
| 578 | len += datalen; |
| 579 | } else { |
| 580 | len = payloadlen; |
| 581 | } |
| 582 | |
| 583 | p = payload + 1; |
| 584 | |
| 585 | dest->type = NGTCP2_FRAME_STREAM; |
| 586 | dest->flags = (uint8_t)(type & ~NGTCP2_FRAME_STREAM); |
| 587 | dest->fin = (type & NGTCP2_STREAM_FIN_BIT0x01) != 0; |
| 588 | dest->stream_id = (int64_t)ngtcp2_get_varint(&n, p); |
| 589 | p += n; |
| 590 | |
| 591 | if (type & NGTCP2_STREAM_OFF_BIT0x04) { |
| 592 | dest->offset = ngtcp2_get_varint(&n, p); |
| 593 | p += n; |
| 594 | } else { |
| 595 | dest->offset = 0; |
| 596 | } |
| 597 | |
| 598 | if (type & NGTCP2_STREAM_LEN_BIT0x02) { |
| 599 | p += ndatalen; |
| 600 | } else { |
| 601 | datalen = payloadlen - (size_t)(p - payload); |
| 602 | } |
| 603 | |
| 604 | if (datalen) { |
| 605 | dest->data[0].len = datalen; |
| 606 | dest->data[0].base = (uint8_t *)p; |
| 607 | dest->datacnt = 1; |
| 608 | p += datalen; |
| 609 | } else { |
| 610 | dest->datacnt = 0; |
| 611 | } |
| 612 | |
| 613 | assert((size_t)(p - payload) == len)((void) (0)); |
| 614 | |
| 615 | return (ngtcp2_ssize)len; |
| 616 | } |
| 617 | |
| 618 | ngtcp2_ssize ngtcp2_pkt_decode_ack_frame(ngtcp2_ack *dest, |
| 619 | const uint8_t *payload, |
| 620 | size_t payloadlen) { |
| 621 | size_t num_blks, max_num_blks; |
| 622 | size_t nnum_blks; |
| 623 | size_t len = 1 + 1 + 1 + 1 + 1; |
| 624 | const uint8_t *p; |
| 625 | size_t i, j; |
| 626 | ngtcp2_ack_blk *blk; |
| 627 | size_t n; |
| 628 | uint8_t type; |
| 629 | uint64_t vi; |
| 630 | |
| 631 | if (payloadlen < len) { |
| 632 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 633 | } |
| 634 | |
| 635 | type = payload[0]; |
| 636 | |
| 637 | p = payload + 1; |
| 638 | |
| 639 | /* Largest Acknowledged */ |
| 640 | n = ngtcp2_get_varint_len(p); |
| 641 | len += n - 1; |
| 642 | |
| 643 | if (payloadlen < len) { |
| 644 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 645 | } |
| 646 | |
| 647 | p += n; |
| 648 | |
| 649 | /* ACK Delay */ |
| 650 | n = ngtcp2_get_varint_len(p); |
| 651 | len += n - 1; |
| 652 | |
| 653 | if (payloadlen < len) { |
| 654 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 655 | } |
| 656 | |
| 657 | p += n; |
| 658 | |
| 659 | /* ACK Block Count */ |
| 660 | nnum_blks = ngtcp2_get_varint_len(p); |
| 661 | len += nnum_blks - 1; |
| 662 | |
| 663 | if (payloadlen < len) { |
| 664 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 665 | } |
| 666 | |
| 667 | vi = ngtcp2_get_varint(&nnum_blks, p); |
| 668 | if (vi > SIZE_MAX(18446744073709551615UL) / (1 + 1) || payloadlen - len < vi * (1 + 1)) { |
| 669 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 670 | } |
| 671 | |
| 672 | num_blks = (size_t)vi; |
| 673 | len += num_blks * (1 + 1); |
| 674 | |
| 675 | p += nnum_blks; |
| 676 | |
| 677 | /* First ACK Block */ |
| 678 | n = ngtcp2_get_varint_len(p); |
| 679 | len += n - 1; |
| 680 | |
| 681 | if (payloadlen < len) { |
| 682 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 683 | } |
| 684 | |
| 685 | p += n; |
| 686 | |
| 687 | for (i = 0; i < num_blks; ++i) { |
| 688 | /* Gap, and Additional ACK Block */ |
| 689 | for (j = 0; j < 2; ++j) { |
| 690 | n = ngtcp2_get_varint_len(p); |
| 691 | len += n - 1; |
| 692 | |
| 693 | if (payloadlen < len) { |
| 694 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 695 | } |
| 696 | |
| 697 | p += n; |
| 698 | } |
| 699 | } |
| 700 | |
| 701 | if (type == NGTCP2_FRAME_ACK_ECN) { |
| 702 | len += 3; |
| 703 | if (payloadlen < len) { |
| 704 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 705 | } |
| 706 | |
| 707 | for (i = 0; i < 3; ++i) { |
| 708 | n = ngtcp2_get_varint_len(p); |
| 709 | len += n - 1; |
| 710 | |
| 711 | if (payloadlen < len) { |
| 712 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 713 | } |
| 714 | |
| 715 | p += n; |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | /* TODO We might not decode all blocks. It could be very large. */ |
| 720 | max_num_blks = ngtcp2_min(NGTCP2_MAX_ACK_BLKS, num_blks)((32) < (num_blks) ? (32) : (num_blks)); |
| 721 | |
| 722 | p = payload + 1; |
| 723 | |
| 724 | dest->type = type; |
| 725 | dest->largest_ack = (int64_t)ngtcp2_get_varint(&n, p); |
| 726 | p += n; |
| 727 | dest->ack_delay = ngtcp2_get_varint(&n, p); |
| 728 | /* This value will be assigned in the upper layer. */ |
| 729 | dest->ack_delay_unscaled = 0; |
| 730 | p += n; |
| 731 | dest->num_blks = max_num_blks; |
| 732 | p += nnum_blks; |
| 733 | dest->first_ack_blklen = ngtcp2_get_varint(&n, p); |
| 734 | p += n; |
| 735 | |
| 736 | for (i = 0; i < max_num_blks; ++i) { |
| 737 | blk = &dest->blks[i]; |
| 738 | blk->gap = ngtcp2_get_varint(&n, p); |
| 739 | p += n; |
| 740 | blk->blklen = ngtcp2_get_varint(&n, p); |
| 741 | p += n; |
| 742 | } |
| 743 | for (i = max_num_blks; i < num_blks; ++i) { |
| 744 | p += ngtcp2_get_varint_len(p); |
| 745 | p += ngtcp2_get_varint_len(p); |
| 746 | } |
| 747 | |
| 748 | if (type == NGTCP2_FRAME_ACK_ECN) { |
| 749 | dest->ecn.ect0 = ngtcp2_get_varint(&n, p); |
| 750 | p += n; |
| 751 | |
| 752 | dest->ecn.ect1 = ngtcp2_get_varint(&n, p); |
| 753 | p += n; |
| 754 | |
| 755 | dest->ecn.ce = ngtcp2_get_varint(&n, p); |
| 756 | p += n; |
| 757 | } |
| 758 | |
| 759 | assert((size_t)(p - payload) == len)((void) (0)); |
| 760 | |
| 761 | return (ngtcp2_ssize)len; |
| 762 | } |
| 763 | |
| 764 | size_t ngtcp2_pkt_decode_padding_frame(ngtcp2_padding *dest, |
| 765 | const uint8_t *payload, |
| 766 | size_t payloadlen) { |
| 767 | const uint8_t *p, *ep; |
| 768 | |
| 769 | assert(payloadlen > 0)((void) (0)); |
| 770 | |
| 771 | p = payload + 1; |
| 772 | ep = payload + payloadlen; |
| 773 | |
| 774 | for (; p != ep && *p == NGTCP2_FRAME_PADDING; ++p) |
| 775 | ; |
| 776 | |
| 777 | dest->type = NGTCP2_FRAME_PADDING; |
| 778 | dest->len = (size_t)(p - payload); |
| 779 | |
| 780 | return dest->len; |
| 781 | } |
| 782 | |
| 783 | ngtcp2_ssize ngtcp2_pkt_decode_reset_stream_frame(ngtcp2_reset_stream *dest, |
| 784 | const uint8_t *payload, |
| 785 | size_t payloadlen) { |
| 786 | size_t len = 1 + 1 + 1 + 1; |
| 787 | const uint8_t *p; |
| 788 | size_t n; |
| 789 | |
| 790 | if (payloadlen < len) { |
| 791 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 792 | } |
| 793 | |
| 794 | p = payload + 1; |
| 795 | |
| 796 | n = ngtcp2_get_varint_len(p); |
| 797 | len += n - 1; |
| 798 | if (payloadlen < len) { |
| 799 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 800 | } |
| 801 | p += n; |
| 802 | n = ngtcp2_get_varint_len(p); |
| 803 | len += n - 1; |
| 804 | if (payloadlen < len) { |
| 805 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 806 | } |
| 807 | p += n; |
| 808 | n = ngtcp2_get_varint_len(p); |
| 809 | len += n - 1; |
| 810 | if (payloadlen < len) { |
| 811 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 812 | } |
| 813 | |
| 814 | p = payload + 1; |
| 815 | |
| 816 | dest->type = NGTCP2_FRAME_RESET_STREAM; |
| 817 | dest->stream_id = (int64_t)ngtcp2_get_varint(&n, p); |
| 818 | p += n; |
| 819 | dest->app_error_code = ngtcp2_get_varint(&n, p); |
| 820 | p += n; |
| 821 | dest->final_size = ngtcp2_get_varint(&n, p); |
| 822 | p += n; |
| 823 | |
| 824 | assert((size_t)(p - payload) == len)((void) (0)); |
| 825 | |
| 826 | return (ngtcp2_ssize)len; |
| 827 | } |
| 828 | |
| 829 | ngtcp2_ssize ngtcp2_pkt_decode_connection_close_frame( |
| 830 | ngtcp2_connection_close *dest, const uint8_t *payload, size_t payloadlen) { |
| 831 | size_t len = 1 + 1 + 1; |
| 832 | const uint8_t *p; |
| 833 | size_t reasonlen; |
| 834 | size_t nreasonlen; |
| 835 | size_t n; |
| 836 | uint8_t type; |
| 837 | uint64_t vi; |
| 838 | |
| 839 | if (payloadlen < len) { |
| 840 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 841 | } |
| 842 | |
| 843 | type = payload[0]; |
| 844 | |
| 845 | p = payload + 1; |
| 846 | |
| 847 | n = ngtcp2_get_varint_len(p); |
| 848 | len += n - 1; |
| 849 | if (payloadlen < len) { |
| 850 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 851 | } |
| 852 | |
| 853 | p += n; |
| 854 | |
| 855 | if (type == NGTCP2_FRAME_CONNECTION_CLOSE) { |
| 856 | ++len; |
| 857 | |
| 858 | n = ngtcp2_get_varint_len(p); |
| 859 | len += n - 1; |
| 860 | if (payloadlen < len) { |
| 861 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 862 | } |
| 863 | |
| 864 | p += n; |
| 865 | } |
| 866 | |
| 867 | nreasonlen = ngtcp2_get_varint_len(p); |
| 868 | len += nreasonlen - 1; |
| 869 | if (payloadlen < len) { |
| 870 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 871 | } |
| 872 | |
| 873 | vi = ngtcp2_get_varint(&nreasonlen, p); |
| 874 | if (payloadlen - len < vi) { |
| 875 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 876 | } |
| 877 | reasonlen = (size_t)vi; |
| 878 | len += reasonlen; |
| 879 | |
| 880 | p = payload + 1; |
| 881 | |
| 882 | dest->type = type; |
| 883 | dest->error_code = ngtcp2_get_varint(&n, p); |
| 884 | p += n; |
| 885 | if (type == NGTCP2_FRAME_CONNECTION_CLOSE) { |
| 886 | dest->frame_type = ngtcp2_get_varint(&n, p); |
| 887 | p += n; |
| 888 | } else { |
| 889 | dest->frame_type = 0; |
| 890 | } |
| 891 | dest->reasonlen = reasonlen; |
| 892 | p += nreasonlen; |
| 893 | if (reasonlen == 0) { |
| 894 | dest->reason = NULL((void*)0); |
| 895 | } else { |
| 896 | dest->reason = (uint8_t *)p; |
| 897 | p += reasonlen; |
| 898 | } |
| 899 | |
| 900 | assert((size_t)(p - payload) == len)((void) (0)); |
| 901 | |
| 902 | return (ngtcp2_ssize)len; |
| 903 | } |
| 904 | |
| 905 | ngtcp2_ssize ngtcp2_pkt_decode_max_data_frame(ngtcp2_max_data *dest, |
| 906 | const uint8_t *payload, |
| 907 | size_t payloadlen) { |
| 908 | size_t len = 1 + 1; |
| 909 | const uint8_t *p; |
| 910 | size_t n; |
| 911 | |
| 912 | if (payloadlen < len) { |
| 913 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 914 | } |
| 915 | |
| 916 | p = payload + 1; |
| 917 | |
| 918 | n = ngtcp2_get_varint_len(p); |
| 919 | len += n - 1; |
| 920 | |
| 921 | if (payloadlen < len) { |
| 922 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 923 | } |
| 924 | |
| 925 | dest->type = NGTCP2_FRAME_MAX_DATA; |
| 926 | dest->max_data = ngtcp2_get_varint(&n, p); |
| 927 | p += n; |
| 928 | |
| 929 | assert((size_t)(p - payload) == len)((void) (0)); |
| 930 | |
| 931 | return (ngtcp2_ssize)len; |
| 932 | } |
| 933 | |
| 934 | ngtcp2_ssize ngtcp2_pkt_decode_max_stream_data_frame( |
| 935 | ngtcp2_max_stream_data *dest, const uint8_t *payload, size_t payloadlen) { |
| 936 | size_t len = 1 + 1 + 1; |
| 937 | const uint8_t *p; |
| 938 | size_t n; |
| 939 | |
| 940 | if (payloadlen < len) { |
| 941 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 942 | } |
| 943 | |
| 944 | p = payload + 1; |
| 945 | |
| 946 | n = ngtcp2_get_varint_len(p); |
| 947 | len += n - 1; |
| 948 | |
| 949 | if (payloadlen < len) { |
| 950 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 951 | } |
| 952 | |
| 953 | p += n; |
| 954 | |
| 955 | n = ngtcp2_get_varint_len(p); |
| 956 | len += n - 1; |
| 957 | |
| 958 | if (payloadlen < len) { |
| 959 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 960 | } |
| 961 | |
| 962 | p = payload + 1; |
| 963 | |
| 964 | dest->type = NGTCP2_FRAME_MAX_STREAM_DATA; |
| 965 | dest->stream_id = (int64_t)ngtcp2_get_varint(&n, p); |
| 966 | p += n; |
| 967 | dest->max_stream_data = ngtcp2_get_varint(&n, p); |
| 968 | p += n; |
| 969 | |
| 970 | assert((size_t)(p - payload) == len)((void) (0)); |
| 971 | |
| 972 | return (ngtcp2_ssize)len; |
| 973 | } |
| 974 | |
| 975 | ngtcp2_ssize ngtcp2_pkt_decode_max_streams_frame(ngtcp2_max_streams *dest, |
| 976 | const uint8_t *payload, |
| 977 | size_t payloadlen) { |
| 978 | size_t len = 1 + 1; |
| 979 | const uint8_t *p; |
| 980 | size_t n; |
| 981 | |
| 982 | if (payloadlen < len) { |
| 983 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 984 | } |
| 985 | |
| 986 | p = payload + 1; |
| 987 | |
| 988 | n = ngtcp2_get_varint_len(p); |
| 989 | len += n - 1; |
| 990 | |
| 991 | if (payloadlen < len) { |
| 992 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 993 | } |
| 994 | |
| 995 | dest->type = payload[0]; |
| 996 | dest->max_streams = ngtcp2_get_varint(&n, p); |
| 997 | p += n; |
| 998 | |
| 999 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1000 | |
| 1001 | return (ngtcp2_ssize)len; |
| 1002 | } |
| 1003 | |
| 1004 | ngtcp2_ssize ngtcp2_pkt_decode_ping_frame(ngtcp2_ping *dest, |
| 1005 | const uint8_t *payload, |
| 1006 | size_t payloadlen) { |
| 1007 | (void)payload; |
| 1008 | (void)payloadlen; |
| 1009 | |
| 1010 | dest->type = NGTCP2_FRAME_PING; |
| 1011 | return 1; |
| 1012 | } |
| 1013 | |
| 1014 | ngtcp2_ssize ngtcp2_pkt_decode_data_blocked_frame(ngtcp2_data_blocked *dest, |
| 1015 | const uint8_t *payload, |
| 1016 | size_t payloadlen) { |
| 1017 | size_t len = 1 + 1; |
| 1018 | const uint8_t *p; |
| 1019 | size_t n; |
| 1020 | |
| 1021 | if (payloadlen < len) { |
| 1022 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1023 | } |
| 1024 | |
| 1025 | p = payload + 1; |
| 1026 | |
| 1027 | n = ngtcp2_get_varint_len(p); |
| 1028 | len += n - 1; |
| 1029 | |
| 1030 | if (payloadlen < len) { |
| 1031 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1032 | } |
| 1033 | |
| 1034 | dest->type = NGTCP2_FRAME_DATA_BLOCKED; |
| 1035 | dest->offset = ngtcp2_get_varint(&n, p); |
| 1036 | p += n; |
| 1037 | |
| 1038 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1039 | |
| 1040 | return (ngtcp2_ssize)len; |
| 1041 | } |
| 1042 | |
| 1043 | ngtcp2_ssize |
| 1044 | ngtcp2_pkt_decode_stream_data_blocked_frame(ngtcp2_stream_data_blocked *dest, |
| 1045 | const uint8_t *payload, |
| 1046 | size_t payloadlen) { |
| 1047 | size_t len = 1 + 1 + 1; |
| 1048 | const uint8_t *p; |
| 1049 | size_t n; |
| 1050 | |
| 1051 | if (payloadlen < len) { |
| 1052 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1053 | } |
| 1054 | |
| 1055 | p = payload + 1; |
| 1056 | |
| 1057 | n = ngtcp2_get_varint_len(p); |
| 1058 | len += n - 1; |
| 1059 | |
| 1060 | if (payloadlen < len) { |
| 1061 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1062 | } |
| 1063 | |
| 1064 | p += n; |
| 1065 | |
| 1066 | n = ngtcp2_get_varint_len(p); |
| 1067 | len += n - 1; |
| 1068 | |
| 1069 | if (payloadlen < len) { |
| 1070 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1071 | } |
| 1072 | |
| 1073 | p = payload + 1; |
| 1074 | |
| 1075 | dest->type = NGTCP2_FRAME_STREAM_DATA_BLOCKED; |
| 1076 | dest->stream_id = (int64_t)ngtcp2_get_varint(&n, p); |
| 1077 | p += n; |
| 1078 | dest->offset = ngtcp2_get_varint(&n, p); |
| 1079 | p += n; |
| 1080 | |
| 1081 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1082 | |
| 1083 | return (ngtcp2_ssize)len; |
| 1084 | } |
| 1085 | |
| 1086 | ngtcp2_ssize ngtcp2_pkt_decode_streams_blocked_frame( |
| 1087 | ngtcp2_streams_blocked *dest, const uint8_t *payload, size_t payloadlen) { |
| 1088 | size_t len = 1 + 1; |
| 1089 | const uint8_t *p; |
| 1090 | size_t n; |
| 1091 | |
| 1092 | if (payloadlen < len) { |
| 1093 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1094 | } |
| 1095 | |
| 1096 | p = payload + 1; |
| 1097 | |
| 1098 | n = ngtcp2_get_varint_len(p); |
| 1099 | len += n - 1; |
| 1100 | |
| 1101 | if (payloadlen < len) { |
| 1102 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1103 | } |
| 1104 | |
| 1105 | dest->type = payload[0]; |
| 1106 | dest->max_streams = ngtcp2_get_varint(&n, p); |
| 1107 | p += n; |
| 1108 | |
| 1109 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1110 | |
| 1111 | return (ngtcp2_ssize)len; |
| 1112 | } |
| 1113 | |
| 1114 | ngtcp2_ssize ngtcp2_pkt_decode_new_connection_id_frame( |
| 1115 | ngtcp2_new_connection_id *dest, const uint8_t *payload, size_t payloadlen) { |
| 1116 | size_t len = 1 + 1 + 1 + 1 + 16; |
| 1117 | const uint8_t *p; |
| 1118 | size_t n; |
| 1119 | size_t cil; |
| 1120 | |
| 1121 | if (payloadlen < len) { |
| 1122 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1123 | } |
| 1124 | |
| 1125 | p = payload + 1; |
| 1126 | |
| 1127 | n = ngtcp2_get_varint_len(p); |
| 1128 | len += n - 1; |
| 1129 | if (payloadlen < len) { |
| 1130 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1131 | } |
| 1132 | |
| 1133 | p += n; |
| 1134 | |
| 1135 | n = ngtcp2_get_varint_len(p); |
| 1136 | len += n - 1; |
| 1137 | if (payloadlen < len) { |
| 1138 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1139 | } |
| 1140 | |
| 1141 | p += n; |
| 1142 | |
| 1143 | cil = *p; |
| 1144 | if (cil < NGTCP2_MIN_CIDLEN1 || cil > NGTCP2_MAX_CIDLEN20) { |
| 1145 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1146 | } |
| 1147 | |
| 1148 | len += cil; |
| 1149 | if (payloadlen < len) { |
| 1150 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1151 | } |
| 1152 | |
| 1153 | p = payload + 1; |
| 1154 | |
| 1155 | dest->type = NGTCP2_FRAME_NEW_CONNECTION_ID; |
| 1156 | dest->seq = ngtcp2_get_varint(&n, p); |
| 1157 | p += n; |
| 1158 | dest->retire_prior_to = ngtcp2_get_varint(&n, p); |
| 1159 | p += n + 1; |
| 1160 | ngtcp2_cid_init(&dest->cid, p, cil); |
| 1161 | p += cil; |
| 1162 | memcpy(dest->stateless_reset_token, p, NGTCP2_STATELESS_RESET_TOKENLEN16); |
| 1163 | p += NGTCP2_STATELESS_RESET_TOKENLEN16; |
| 1164 | |
| 1165 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1166 | |
| 1167 | return (ngtcp2_ssize)len; |
| 1168 | } |
| 1169 | |
| 1170 | ngtcp2_ssize ngtcp2_pkt_decode_stop_sending_frame(ngtcp2_stop_sending *dest, |
| 1171 | const uint8_t *payload, |
| 1172 | size_t payloadlen) { |
| 1173 | size_t len = 1 + 1 + 1; |
| 1174 | const uint8_t *p; |
| 1175 | size_t n; |
| 1176 | |
| 1177 | if (payloadlen < len) { |
| 1178 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1179 | } |
| 1180 | |
| 1181 | p = payload + 1; |
| 1182 | |
| 1183 | n = ngtcp2_get_varint_len(p); |
| 1184 | len += n - 1; |
| 1185 | |
| 1186 | if (payloadlen < len) { |
| 1187 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1188 | } |
| 1189 | p += n; |
| 1190 | n = ngtcp2_get_varint_len(p); |
| 1191 | len += n - 1; |
| 1192 | |
| 1193 | if (payloadlen < len) { |
| 1194 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1195 | } |
| 1196 | |
| 1197 | p = payload + 1; |
| 1198 | |
| 1199 | dest->type = NGTCP2_FRAME_STOP_SENDING; |
| 1200 | dest->stream_id = (int64_t)ngtcp2_get_varint(&n, p); |
| 1201 | p += n; |
| 1202 | dest->app_error_code = ngtcp2_get_varint(&n, p); |
| 1203 | p += n; |
| 1204 | |
| 1205 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1206 | |
| 1207 | return (ngtcp2_ssize)len; |
| 1208 | } |
| 1209 | |
| 1210 | ngtcp2_ssize ngtcp2_pkt_decode_path_challenge_frame(ngtcp2_path_challenge *dest, |
| 1211 | const uint8_t *payload, |
| 1212 | size_t payloadlen) { |
| 1213 | size_t len = 1 + 8; |
| 1214 | const uint8_t *p; |
| 1215 | |
| 1216 | if (payloadlen < len) { |
| 1217 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1218 | } |
| 1219 | |
| 1220 | p = payload + 1; |
| 1221 | |
| 1222 | dest->type = NGTCP2_FRAME_PATH_CHALLENGE; |
| 1223 | ngtcp2_cpymem(dest->data, p, sizeof(dest->data)); |
| 1224 | p += sizeof(dest->data); |
| 1225 | |
| 1226 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1227 | |
| 1228 | return (ngtcp2_ssize)len; |
| 1229 | } |
| 1230 | |
| 1231 | ngtcp2_ssize ngtcp2_pkt_decode_path_response_frame(ngtcp2_path_response *dest, |
| 1232 | const uint8_t *payload, |
| 1233 | size_t payloadlen) { |
| 1234 | size_t len = 1 + 8; |
| 1235 | const uint8_t *p; |
| 1236 | |
| 1237 | if (payloadlen < len) { |
| 1238 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1239 | } |
| 1240 | |
| 1241 | p = payload + 1; |
| 1242 | |
| 1243 | dest->type = NGTCP2_FRAME_PATH_RESPONSE; |
| 1244 | ngtcp2_cpymem(dest->data, p, sizeof(dest->data)); |
| 1245 | p += sizeof(dest->data); |
| 1246 | |
| 1247 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1248 | |
| 1249 | return (ngtcp2_ssize)len; |
| 1250 | } |
| 1251 | |
| 1252 | ngtcp2_ssize ngtcp2_pkt_decode_crypto_frame(ngtcp2_crypto *dest, |
| 1253 | const uint8_t *payload, |
| 1254 | size_t payloadlen) { |
| 1255 | size_t len = 1 + 1 + 1; |
| 1256 | const uint8_t *p; |
| 1257 | size_t datalen; |
| 1258 | size_t ndatalen; |
| 1259 | size_t n; |
| 1260 | uint64_t vi; |
| 1261 | |
| 1262 | if (payloadlen < len) { |
| 1263 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1264 | } |
| 1265 | |
| 1266 | p = payload + 1; |
| 1267 | |
| 1268 | n = ngtcp2_get_varint_len(p); |
| 1269 | len += n - 1; |
| 1270 | |
| 1271 | if (payloadlen < len) { |
| 1272 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1273 | } |
| 1274 | |
| 1275 | p += n; |
| 1276 | |
| 1277 | ndatalen = ngtcp2_get_varint_len(p); |
| 1278 | len += ndatalen - 1; |
| 1279 | |
| 1280 | if (payloadlen < len) { |
| 1281 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1282 | } |
| 1283 | |
| 1284 | vi = ngtcp2_get_varint(&ndatalen, p); |
| 1285 | if (payloadlen - len < vi) { |
| 1286 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1287 | } |
| 1288 | |
| 1289 | datalen = (size_t)vi; |
| 1290 | len += datalen; |
| 1291 | |
| 1292 | p = payload + 1; |
| 1293 | |
| 1294 | dest->type = NGTCP2_FRAME_CRYPTO; |
| 1295 | dest->offset = ngtcp2_get_varint(&n, p); |
| 1296 | p += n; |
| 1297 | dest->data[0].len = datalen; |
| 1298 | p += ndatalen; |
| 1299 | if (dest->data[0].len) { |
| 1300 | dest->data[0].base = (uint8_t *)p; |
| 1301 | p += dest->data[0].len; |
| 1302 | dest->datacnt = 1; |
| 1303 | } else { |
| 1304 | dest->data[0].base = NULL((void*)0); |
| 1305 | dest->datacnt = 0; |
| 1306 | } |
| 1307 | |
| 1308 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1309 | |
| 1310 | return (ngtcp2_ssize)len; |
| 1311 | } |
| 1312 | |
| 1313 | ngtcp2_ssize ngtcp2_pkt_decode_new_token_frame(ngtcp2_new_token *dest, |
| 1314 | const uint8_t *payload, |
| 1315 | size_t payloadlen) { |
| 1316 | size_t len = 1 + 1; |
| 1317 | const uint8_t *p; |
| 1318 | size_t n; |
| 1319 | size_t datalen; |
| 1320 | uint64_t vi; |
| 1321 | |
| 1322 | if (payloadlen < len) { |
| 1323 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1324 | } |
| 1325 | |
| 1326 | p = payload + 1; |
| 1327 | |
| 1328 | n = ngtcp2_get_varint_len(p); |
| 1329 | len += n - 1; |
| 1330 | |
| 1331 | if (payloadlen < len) { |
| 1332 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1333 | } |
| 1334 | |
| 1335 | vi = ngtcp2_get_varint(&n, p); |
| 1336 | if (payloadlen - len < vi) { |
| 1337 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1338 | } |
| 1339 | datalen = (size_t)vi; |
| 1340 | len += datalen; |
| 1341 | |
| 1342 | dest->type = NGTCP2_FRAME_NEW_TOKEN; |
| 1343 | dest->token.len = datalen; |
| 1344 | p += n; |
| 1345 | dest->token.base = (uint8_t *)p; |
| 1346 | p += dest->token.len; |
Value stored to 'p' is never read | |
| 1347 | |
| 1348 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1349 | |
| 1350 | return (ngtcp2_ssize)len; |
| 1351 | } |
| 1352 | |
| 1353 | ngtcp2_ssize |
| 1354 | ngtcp2_pkt_decode_retire_connection_id_frame(ngtcp2_retire_connection_id *dest, |
| 1355 | const uint8_t *payload, |
| 1356 | size_t payloadlen) { |
| 1357 | size_t len = 1 + 1; |
| 1358 | const uint8_t *p; |
| 1359 | size_t n; |
| 1360 | |
| 1361 | if (payloadlen < len) { |
| 1362 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1363 | } |
| 1364 | |
| 1365 | p = payload + 1; |
| 1366 | |
| 1367 | n = ngtcp2_get_varint_len(p); |
| 1368 | len += n - 1; |
| 1369 | |
| 1370 | if (payloadlen < len) { |
| 1371 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1372 | } |
| 1373 | |
| 1374 | dest->type = NGTCP2_FRAME_RETIRE_CONNECTION_ID; |
| 1375 | dest->seq = ngtcp2_get_varint(&n, p); |
| 1376 | p += n; |
| 1377 | |
| 1378 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1379 | |
| 1380 | return (ngtcp2_ssize)len; |
| 1381 | } |
| 1382 | |
| 1383 | ngtcp2_ssize ngtcp2_pkt_decode_handshake_done_frame(ngtcp2_handshake_done *dest, |
| 1384 | const uint8_t *payload, |
| 1385 | size_t payloadlen) { |
| 1386 | (void)payload; |
| 1387 | (void)payloadlen; |
| 1388 | |
| 1389 | dest->type = NGTCP2_FRAME_HANDSHAKE_DONE; |
| 1390 | return 1; |
| 1391 | } |
| 1392 | |
| 1393 | ngtcp2_ssize ngtcp2_pkt_decode_datagram_frame(ngtcp2_datagram *dest, |
| 1394 | const uint8_t *payload, |
| 1395 | size_t payloadlen) { |
| 1396 | size_t len = 1; |
| 1397 | const uint8_t *p; |
| 1398 | uint8_t type; |
| 1399 | size_t datalen; |
| 1400 | size_t n; |
| 1401 | uint64_t vi; |
| 1402 | |
| 1403 | if (payloadlen < len) { |
| 1404 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1405 | } |
| 1406 | |
| 1407 | type = payload[0]; |
| 1408 | |
| 1409 | p = payload + 1; |
| 1410 | |
| 1411 | switch (type) { |
| 1412 | case NGTCP2_FRAME_DATAGRAM: |
| 1413 | datalen = payloadlen - 1; |
| 1414 | len = payloadlen; |
| 1415 | break; |
| 1416 | case NGTCP2_FRAME_DATAGRAM_LEN: |
| 1417 | ++len; |
| 1418 | if (payloadlen < len) { |
| 1419 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1420 | } |
| 1421 | |
| 1422 | n = ngtcp2_get_varint_len(p); |
| 1423 | len += n - 1; |
| 1424 | |
| 1425 | if (payloadlen < len) { |
| 1426 | return NGTCP2_ERR_FRAME_ENCODING-219; |
| 1427 | } |
| 1428 | |
| 1429 | vi = ngtcp2_get_varint(&n, p); |
| 1430 | if (payloadlen - len < vi) { |
| 1431 | return NGTCP2_FRAME_ENCODING_ERROR0x7u; |
| 1432 | } |
| 1433 | |
| 1434 | datalen = (size_t)vi; |
| 1435 | len += datalen; |
| 1436 | break; |
| 1437 | default: |
| 1438 | assert(0)((void) (0)); |
| 1439 | } |
| 1440 | |
| 1441 | dest->type = type; |
| 1442 | |
| 1443 | if (datalen == 0) { |
| 1444 | dest->datacnt = 0; |
| 1445 | dest->data = NULL((void*)0); |
| 1446 | |
| 1447 | if (type == NGTCP2_FRAME_DATAGRAM_LEN) { |
| 1448 | p += n; |
| 1449 | } |
| 1450 | } else { |
| 1451 | dest->datacnt = 1; |
| 1452 | dest->data = dest->rdata; |
| 1453 | dest->rdata[0].len = datalen; |
| 1454 | |
| 1455 | if (type == NGTCP2_FRAME_DATAGRAM_LEN) { |
| 1456 | p += n; |
| 1457 | } |
| 1458 | |
| 1459 | dest->rdata[0].base = (uint8_t *)p; |
| 1460 | p += datalen; |
| 1461 | } |
| 1462 | |
| 1463 | assert((size_t)(p - payload) == len)((void) (0)); |
| 1464 | |
| 1465 | return (ngtcp2_ssize)len; |
| 1466 | } |
| 1467 | |
| 1468 | ngtcp2_ssize ngtcp2_pkt_encode_frame(uint8_t *out, size_t outlen, |
| 1469 | ngtcp2_frame *fr) { |
| 1470 | switch (fr->type) { |
| 1471 | case NGTCP2_FRAME_STREAM: |
| 1472 | return ngtcp2_pkt_encode_stream_frame(out, outlen, &fr->stream); |
| 1473 | case NGTCP2_FRAME_ACK: |
| 1474 | case NGTCP2_FRAME_ACK_ECN: |
| 1475 | return ngtcp2_pkt_encode_ack_frame(out, outlen, &fr->ack); |
| 1476 | case NGTCP2_FRAME_PADDING: |
| 1477 | return ngtcp2_pkt_encode_padding_frame(out, outlen, &fr->padding); |
| 1478 | case NGTCP2_FRAME_RESET_STREAM: |
| 1479 | return ngtcp2_pkt_encode_reset_stream_frame(out, outlen, &fr->reset_stream); |
| 1480 | case NGTCP2_FRAME_CONNECTION_CLOSE: |
| 1481 | case NGTCP2_FRAME_CONNECTION_CLOSE_APP: |
| 1482 | return ngtcp2_pkt_encode_connection_close_frame(out, outlen, |
| 1483 | &fr->connection_close); |
| 1484 | case NGTCP2_FRAME_MAX_DATA: |
| 1485 | return ngtcp2_pkt_encode_max_data_frame(out, outlen, &fr->max_data); |
| 1486 | case NGTCP2_FRAME_MAX_STREAM_DATA: |
| 1487 | return ngtcp2_pkt_encode_max_stream_data_frame(out, outlen, |
| 1488 | &fr->max_stream_data); |
| 1489 | case NGTCP2_FRAME_MAX_STREAMS_BIDI: |
| 1490 | case NGTCP2_FRAME_MAX_STREAMS_UNI: |
| 1491 | return ngtcp2_pkt_encode_max_streams_frame(out, outlen, &fr->max_streams); |
| 1492 | case NGTCP2_FRAME_PING: |
| 1493 | return ngtcp2_pkt_encode_ping_frame(out, outlen, &fr->ping); |
| 1494 | case NGTCP2_FRAME_DATA_BLOCKED: |
| 1495 | return ngtcp2_pkt_encode_data_blocked_frame(out, outlen, &fr->data_blocked); |
| 1496 | case NGTCP2_FRAME_STREAM_DATA_BLOCKED: |
| 1497 | return ngtcp2_pkt_encode_stream_data_blocked_frame( |
| 1498 | out, outlen, &fr->stream_data_blocked); |
| 1499 | case NGTCP2_FRAME_STREAMS_BLOCKED_BIDI: |
| 1500 | case NGTCP2_FRAME_STREAMS_BLOCKED_UNI: |
| 1501 | return ngtcp2_pkt_encode_streams_blocked_frame(out, outlen, |
| 1502 | &fr->streams_blocked); |
| 1503 | case NGTCP2_FRAME_NEW_CONNECTION_ID: |
| 1504 | return ngtcp2_pkt_encode_new_connection_id_frame(out, outlen, |
| 1505 | &fr->new_connection_id); |
| 1506 | case NGTCP2_FRAME_STOP_SENDING: |
| 1507 | return ngtcp2_pkt_encode_stop_sending_frame(out, outlen, &fr->stop_sending); |
| 1508 | case NGTCP2_FRAME_PATH_CHALLENGE: |
| 1509 | return ngtcp2_pkt_encode_path_challenge_frame(out, outlen, |
| 1510 | &fr->path_challenge); |
| 1511 | case NGTCP2_FRAME_PATH_RESPONSE: |
| 1512 | return ngtcp2_pkt_encode_path_response_frame(out, outlen, |
| 1513 | &fr->path_response); |
| 1514 | case NGTCP2_FRAME_CRYPTO: |
| 1515 | return ngtcp2_pkt_encode_crypto_frame(out, outlen, &fr->crypto); |
| 1516 | case NGTCP2_FRAME_NEW_TOKEN: |
| 1517 | return ngtcp2_pkt_encode_new_token_frame(out, outlen, &fr->new_token); |
| 1518 | case NGTCP2_FRAME_RETIRE_CONNECTION_ID: |
| 1519 | return ngtcp2_pkt_encode_retire_connection_id_frame( |
| 1520 | out, outlen, &fr->retire_connection_id); |
| 1521 | case NGTCP2_FRAME_HANDSHAKE_DONE: |
| 1522 | return ngtcp2_pkt_encode_handshake_done_frame(out, outlen, |
| 1523 | &fr->handshake_done); |
| 1524 | case NGTCP2_FRAME_DATAGRAM: |
| 1525 | case NGTCP2_FRAME_DATAGRAM_LEN: |
| 1526 | return ngtcp2_pkt_encode_datagram_frame(out, outlen, &fr->datagram); |
| 1527 | default: |
| 1528 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 1529 | } |
| 1530 | } |
| 1531 | |
| 1532 | ngtcp2_ssize ngtcp2_pkt_encode_stream_frame(uint8_t *out, size_t outlen, |
| 1533 | ngtcp2_stream *fr) { |
| 1534 | size_t len = 1; |
| 1535 | uint8_t flags = NGTCP2_STREAM_LEN_BIT0x02; |
| 1536 | uint8_t *p; |
| 1537 | size_t i; |
| 1538 | size_t datalen = 0; |
| 1539 | |
| 1540 | if (fr->fin) { |
| 1541 | flags |= NGTCP2_STREAM_FIN_BIT0x01; |
| 1542 | } |
| 1543 | |
| 1544 | if (fr->offset) { |
| 1545 | flags |= NGTCP2_STREAM_OFF_BIT0x04; |
| 1546 | len += ngtcp2_put_varint_len(fr->offset); |
| 1547 | } |
| 1548 | |
| 1549 | len += ngtcp2_put_varint_len((uint64_t)fr->stream_id); |
| 1550 | |
| 1551 | for (i = 0; i < fr->datacnt; ++i) { |
| 1552 | datalen += fr->data[i].len; |
| 1553 | } |
| 1554 | |
| 1555 | len += ngtcp2_put_varint_len(datalen); |
| 1556 | len += datalen; |
| 1557 | |
| 1558 | if (outlen < len) { |
| 1559 | return NGTCP2_ERR_NOBUF-203; |
| 1560 | } |
| 1561 | |
| 1562 | p = out; |
| 1563 | |
| 1564 | *p++ = flags | NGTCP2_FRAME_STREAM; |
| 1565 | |
| 1566 | fr->flags = flags; |
| 1567 | |
| 1568 | p = ngtcp2_put_varint(p, (uint64_t)fr->stream_id); |
| 1569 | |
| 1570 | if (fr->offset) { |
| 1571 | p = ngtcp2_put_varint(p, fr->offset); |
| 1572 | } |
| 1573 | |
| 1574 | p = ngtcp2_put_varint(p, datalen); |
| 1575 | |
| 1576 | for (i = 0; i < fr->datacnt; ++i) { |
| 1577 | assert(fr->data[i].len)((void) (0)); |
| 1578 | assert(fr->data[i].base)((void) (0)); |
| 1579 | p = ngtcp2_cpymem(p, fr->data[i].base, fr->data[i].len); |
| 1580 | } |
| 1581 | |
| 1582 | assert((size_t)(p - out) == len)((void) (0)); |
| 1583 | |
| 1584 | return (ngtcp2_ssize)len; |
| 1585 | } |
| 1586 | |
| 1587 | ngtcp2_ssize ngtcp2_pkt_encode_ack_frame(uint8_t *out, size_t outlen, |
| 1588 | ngtcp2_ack *fr) { |
| 1589 | size_t len = 1 + ngtcp2_put_varint_len((uint64_t)fr->largest_ack) + |
| 1590 | ngtcp2_put_varint_len(fr->ack_delay) + |
| 1591 | ngtcp2_put_varint_len(fr->num_blks) + |
| 1592 | ngtcp2_put_varint_len(fr->first_ack_blklen); |
| 1593 | uint8_t *p; |
| 1594 | size_t i; |
| 1595 | const ngtcp2_ack_blk *blk; |
| 1596 | |
| 1597 | for (i = 0; i < fr->num_blks; ++i) { |
| 1598 | blk = &fr->blks[i]; |
| 1599 | len += ngtcp2_put_varint_len(blk->gap); |
| 1600 | len += ngtcp2_put_varint_len(blk->blklen); |
| 1601 | } |
| 1602 | |
| 1603 | if (fr->type == NGTCP2_FRAME_ACK_ECN) { |
| 1604 | len += ngtcp2_put_varint_len(fr->ecn.ect0) + |
| 1605 | ngtcp2_put_varint_len(fr->ecn.ect1) + |
| 1606 | ngtcp2_put_varint_len(fr->ecn.ce); |
| 1607 | } |
| 1608 | |
| 1609 | if (outlen < len) { |
| 1610 | return NGTCP2_ERR_NOBUF-203; |
| 1611 | } |
| 1612 | |
| 1613 | p = out; |
| 1614 | |
| 1615 | *p++ = fr->type; |
| 1616 | p = ngtcp2_put_varint(p, (uint64_t)fr->largest_ack); |
| 1617 | p = ngtcp2_put_varint(p, fr->ack_delay); |
| 1618 | p = ngtcp2_put_varint(p, fr->num_blks); |
| 1619 | p = ngtcp2_put_varint(p, fr->first_ack_blklen); |
| 1620 | |
| 1621 | for (i = 0; i < fr->num_blks; ++i) { |
| 1622 | blk = &fr->blks[i]; |
| 1623 | p = ngtcp2_put_varint(p, blk->gap); |
| 1624 | p = ngtcp2_put_varint(p, blk->blklen); |
| 1625 | } |
| 1626 | |
| 1627 | if (fr->type == NGTCP2_FRAME_ACK_ECN) { |
| 1628 | p = ngtcp2_put_varint(p, fr->ecn.ect0); |
| 1629 | p = ngtcp2_put_varint(p, fr->ecn.ect1); |
| 1630 | p = ngtcp2_put_varint(p, fr->ecn.ce); |
| 1631 | } |
| 1632 | |
| 1633 | assert((size_t)(p - out) == len)((void) (0)); |
| 1634 | |
| 1635 | return (ngtcp2_ssize)len; |
| 1636 | } |
| 1637 | |
| 1638 | ngtcp2_ssize ngtcp2_pkt_encode_padding_frame(uint8_t *out, size_t outlen, |
| 1639 | const ngtcp2_padding *fr) { |
| 1640 | if (outlen < fr->len) { |
| 1641 | return NGTCP2_ERR_NOBUF-203; |
| 1642 | } |
| 1643 | |
| 1644 | memset(out, 0, fr->len); |
| 1645 | |
| 1646 | return (ngtcp2_ssize)fr->len; |
| 1647 | } |
| 1648 | |
| 1649 | ngtcp2_ssize |
| 1650 | ngtcp2_pkt_encode_reset_stream_frame(uint8_t *out, size_t outlen, |
| 1651 | const ngtcp2_reset_stream *fr) { |
| 1652 | size_t len = 1 + ngtcp2_put_varint_len((uint64_t)fr->stream_id) + |
| 1653 | ngtcp2_put_varint_len(fr->app_error_code) + |
| 1654 | ngtcp2_put_varint_len(fr->final_size); |
| 1655 | uint8_t *p; |
| 1656 | |
| 1657 | if (outlen < len) { |
| 1658 | return NGTCP2_ERR_NOBUF-203; |
| 1659 | } |
| 1660 | |
| 1661 | p = out; |
| 1662 | |
| 1663 | *p++ = NGTCP2_FRAME_RESET_STREAM; |
| 1664 | p = ngtcp2_put_varint(p, (uint64_t)fr->stream_id); |
| 1665 | p = ngtcp2_put_varint(p, fr->app_error_code); |
| 1666 | p = ngtcp2_put_varint(p, fr->final_size); |
| 1667 | |
| 1668 | assert((size_t)(p - out) == len)((void) (0)); |
| 1669 | |
| 1670 | return (ngtcp2_ssize)len; |
| 1671 | } |
| 1672 | |
| 1673 | ngtcp2_ssize |
| 1674 | ngtcp2_pkt_encode_connection_close_frame(uint8_t *out, size_t outlen, |
| 1675 | const ngtcp2_connection_close *fr) { |
| 1676 | size_t len = 1 + ngtcp2_put_varint_len(fr->error_code) + |
| 1677 | (fr->type == NGTCP2_FRAME_CONNECTION_CLOSE |
| 1678 | ? ngtcp2_put_varint_len(fr->frame_type) |
| 1679 | : 0) + |
| 1680 | ngtcp2_put_varint_len(fr->reasonlen) + fr->reasonlen; |
| 1681 | uint8_t *p; |
| 1682 | |
| 1683 | if (outlen < len) { |
| 1684 | return NGTCP2_ERR_NOBUF-203; |
| 1685 | } |
| 1686 | |
| 1687 | p = out; |
| 1688 | |
| 1689 | *p++ = fr->type; |
| 1690 | p = ngtcp2_put_varint(p, fr->error_code); |
| 1691 | if (fr->type == NGTCP2_FRAME_CONNECTION_CLOSE) { |
| 1692 | p = ngtcp2_put_varint(p, fr->frame_type); |
| 1693 | } |
| 1694 | p = ngtcp2_put_varint(p, fr->reasonlen); |
| 1695 | if (fr->reasonlen) { |
| 1696 | p = ngtcp2_cpymem(p, fr->reason, fr->reasonlen); |
| 1697 | } |
| 1698 | |
| 1699 | assert((size_t)(p - out) == len)((void) (0)); |
| 1700 | |
| 1701 | return (ngtcp2_ssize)len; |
| 1702 | } |
| 1703 | |
| 1704 | ngtcp2_ssize ngtcp2_pkt_encode_max_data_frame(uint8_t *out, size_t outlen, |
| 1705 | const ngtcp2_max_data *fr) { |
| 1706 | size_t len = 1 + ngtcp2_put_varint_len(fr->max_data); |
| 1707 | uint8_t *p; |
| 1708 | |
| 1709 | if (outlen < len) { |
| 1710 | return NGTCP2_ERR_NOBUF-203; |
| 1711 | } |
| 1712 | |
| 1713 | p = out; |
| 1714 | |
| 1715 | *p++ = NGTCP2_FRAME_MAX_DATA; |
| 1716 | p = ngtcp2_put_varint(p, fr->max_data); |
| 1717 | |
| 1718 | assert((size_t)(p - out) == len)((void) (0)); |
| 1719 | |
| 1720 | return (ngtcp2_ssize)len; |
| 1721 | } |
| 1722 | |
| 1723 | ngtcp2_ssize |
| 1724 | ngtcp2_pkt_encode_max_stream_data_frame(uint8_t *out, size_t outlen, |
| 1725 | const ngtcp2_max_stream_data *fr) { |
| 1726 | size_t len = 1 + ngtcp2_put_varint_len((uint64_t)fr->stream_id) + |
| 1727 | ngtcp2_put_varint_len(fr->max_stream_data); |
| 1728 | uint8_t *p; |
| 1729 | |
| 1730 | if (outlen < len) { |
| 1731 | return NGTCP2_ERR_NOBUF-203; |
| 1732 | } |
| 1733 | |
| 1734 | p = out; |
| 1735 | |
| 1736 | *p++ = NGTCP2_FRAME_MAX_STREAM_DATA; |
| 1737 | p = ngtcp2_put_varint(p, (uint64_t)fr->stream_id); |
| 1738 | p = ngtcp2_put_varint(p, fr->max_stream_data); |
| 1739 | |
| 1740 | assert((size_t)(p - out) == len)((void) (0)); |
| 1741 | |
| 1742 | return (ngtcp2_ssize)len; |
| 1743 | } |
| 1744 | |
| 1745 | ngtcp2_ssize ngtcp2_pkt_encode_max_streams_frame(uint8_t *out, size_t outlen, |
| 1746 | const ngtcp2_max_streams *fr) { |
| 1747 | size_t len = 1 + ngtcp2_put_varint_len(fr->max_streams); |
| 1748 | uint8_t *p; |
| 1749 | |
| 1750 | if (outlen < len) { |
| 1751 | return NGTCP2_ERR_NOBUF-203; |
| 1752 | } |
| 1753 | |
| 1754 | p = out; |
| 1755 | |
| 1756 | *p++ = fr->type; |
| 1757 | p = ngtcp2_put_varint(p, fr->max_streams); |
| 1758 | |
| 1759 | assert((size_t)(p - out) == len)((void) (0)); |
| 1760 | |
| 1761 | return (ngtcp2_ssize)len; |
| 1762 | } |
| 1763 | |
| 1764 | ngtcp2_ssize ngtcp2_pkt_encode_ping_frame(uint8_t *out, size_t outlen, |
| 1765 | const ngtcp2_ping *fr) { |
| 1766 | (void)fr; |
| 1767 | |
| 1768 | if (outlen < 1) { |
| 1769 | return NGTCP2_ERR_NOBUF-203; |
| 1770 | } |
| 1771 | |
| 1772 | *out++ = NGTCP2_FRAME_PING; |
| 1773 | |
| 1774 | return 1; |
| 1775 | } |
| 1776 | |
| 1777 | ngtcp2_ssize |
| 1778 | ngtcp2_pkt_encode_data_blocked_frame(uint8_t *out, size_t outlen, |
| 1779 | const ngtcp2_data_blocked *fr) { |
| 1780 | size_t len = 1 + ngtcp2_put_varint_len(fr->offset); |
| 1781 | uint8_t *p; |
| 1782 | |
| 1783 | if (outlen < len) { |
| 1784 | return NGTCP2_ERR_NOBUF-203; |
| 1785 | } |
| 1786 | |
| 1787 | p = out; |
| 1788 | |
| 1789 | *p++ = NGTCP2_FRAME_DATA_BLOCKED; |
| 1790 | p = ngtcp2_put_varint(p, fr->offset); |
| 1791 | |
| 1792 | assert((size_t)(p - out) == len)((void) (0)); |
| 1793 | |
| 1794 | return (ngtcp2_ssize)len; |
| 1795 | } |
| 1796 | |
| 1797 | ngtcp2_ssize ngtcp2_pkt_encode_stream_data_blocked_frame( |
| 1798 | uint8_t *out, size_t outlen, const ngtcp2_stream_data_blocked *fr) { |
| 1799 | size_t len = 1 + ngtcp2_put_varint_len((uint64_t)fr->stream_id) + |
| 1800 | ngtcp2_put_varint_len(fr->offset); |
| 1801 | uint8_t *p; |
| 1802 | |
| 1803 | if (outlen < len) { |
| 1804 | return NGTCP2_ERR_NOBUF-203; |
| 1805 | } |
| 1806 | |
| 1807 | p = out; |
| 1808 | |
| 1809 | *p++ = NGTCP2_FRAME_STREAM_DATA_BLOCKED; |
| 1810 | p = ngtcp2_put_varint(p, (uint64_t)fr->stream_id); |
| 1811 | p = ngtcp2_put_varint(p, fr->offset); |
| 1812 | |
| 1813 | assert((size_t)(p - out) == len)((void) (0)); |
| 1814 | |
| 1815 | return (ngtcp2_ssize)len; |
| 1816 | } |
| 1817 | |
| 1818 | ngtcp2_ssize |
| 1819 | ngtcp2_pkt_encode_streams_blocked_frame(uint8_t *out, size_t outlen, |
| 1820 | const ngtcp2_streams_blocked *fr) { |
| 1821 | size_t len = 1 + ngtcp2_put_varint_len(fr->max_streams); |
| 1822 | uint8_t *p; |
| 1823 | |
| 1824 | if (outlen < len) { |
| 1825 | return NGTCP2_ERR_NOBUF-203; |
| 1826 | } |
| 1827 | |
| 1828 | p = out; |
| 1829 | |
| 1830 | *p++ = fr->type; |
| 1831 | p = ngtcp2_put_varint(p, fr->max_streams); |
| 1832 | |
| 1833 | assert((size_t)(p - out) == len)((void) (0)); |
| 1834 | |
| 1835 | return (ngtcp2_ssize)len; |
| 1836 | } |
| 1837 | |
| 1838 | ngtcp2_ssize |
| 1839 | ngtcp2_pkt_encode_new_connection_id_frame(uint8_t *out, size_t outlen, |
| 1840 | const ngtcp2_new_connection_id *fr) { |
| 1841 | size_t len = 1 + ngtcp2_put_varint_len(fr->seq) + |
| 1842 | ngtcp2_put_varint_len(fr->retire_prior_to) + 1 + |
| 1843 | fr->cid.datalen + NGTCP2_STATELESS_RESET_TOKENLEN16; |
| 1844 | uint8_t *p; |
| 1845 | |
| 1846 | if (outlen < len) { |
| 1847 | return NGTCP2_ERR_NOBUF-203; |
| 1848 | } |
| 1849 | |
| 1850 | p = out; |
| 1851 | |
| 1852 | *p++ = NGTCP2_FRAME_NEW_CONNECTION_ID; |
| 1853 | p = ngtcp2_put_varint(p, fr->seq); |
| 1854 | p = ngtcp2_put_varint(p, fr->retire_prior_to); |
| 1855 | *p++ = (uint8_t)fr->cid.datalen; |
| 1856 | p = ngtcp2_cpymem(p, fr->cid.data, fr->cid.datalen); |
| 1857 | p = ngtcp2_cpymem(p, fr->stateless_reset_token, |
| 1858 | NGTCP2_STATELESS_RESET_TOKENLEN16); |
| 1859 | |
| 1860 | assert((size_t)(p - out) == len)((void) (0)); |
| 1861 | |
| 1862 | return (ngtcp2_ssize)len; |
| 1863 | } |
| 1864 | |
| 1865 | ngtcp2_ssize |
| 1866 | ngtcp2_pkt_encode_stop_sending_frame(uint8_t *out, size_t outlen, |
| 1867 | const ngtcp2_stop_sending *fr) { |
| 1868 | size_t len = 1 + ngtcp2_put_varint_len((uint64_t)fr->stream_id) + |
| 1869 | ngtcp2_put_varint_len(fr->app_error_code); |
| 1870 | uint8_t *p; |
| 1871 | |
| 1872 | if (outlen < len) { |
| 1873 | return NGTCP2_ERR_NOBUF-203; |
| 1874 | } |
| 1875 | |
| 1876 | p = out; |
| 1877 | |
| 1878 | *p++ = NGTCP2_FRAME_STOP_SENDING; |
| 1879 | p = ngtcp2_put_varint(p, (uint64_t)fr->stream_id); |
| 1880 | p = ngtcp2_put_varint(p, fr->app_error_code); |
| 1881 | |
| 1882 | assert((size_t)(p - out) == len)((void) (0)); |
| 1883 | |
| 1884 | return (ngtcp2_ssize)len; |
| 1885 | } |
| 1886 | |
| 1887 | ngtcp2_ssize |
| 1888 | ngtcp2_pkt_encode_path_challenge_frame(uint8_t *out, size_t outlen, |
| 1889 | const ngtcp2_path_challenge *fr) { |
| 1890 | size_t len = 1 + 8; |
| 1891 | uint8_t *p; |
| 1892 | |
| 1893 | if (outlen < len) { |
| 1894 | return NGTCP2_ERR_NOBUF-203; |
| 1895 | } |
| 1896 | |
| 1897 | p = out; |
| 1898 | |
| 1899 | *p++ = NGTCP2_FRAME_PATH_CHALLENGE; |
| 1900 | p = ngtcp2_cpymem(p, fr->data, sizeof(fr->data)); |
| 1901 | |
| 1902 | assert((size_t)(p - out) == len)((void) (0)); |
| 1903 | |
| 1904 | return (ngtcp2_ssize)len; |
| 1905 | } |
| 1906 | |
| 1907 | ngtcp2_ssize |
| 1908 | ngtcp2_pkt_encode_path_response_frame(uint8_t *out, size_t outlen, |
| 1909 | const ngtcp2_path_response *fr) { |
| 1910 | size_t len = 1 + 8; |
| 1911 | uint8_t *p; |
| 1912 | |
| 1913 | if (outlen < len) { |
| 1914 | return NGTCP2_ERR_NOBUF-203; |
| 1915 | } |
| 1916 | |
| 1917 | p = out; |
| 1918 | |
| 1919 | *p++ = NGTCP2_FRAME_PATH_RESPONSE; |
| 1920 | p = ngtcp2_cpymem(p, fr->data, sizeof(fr->data)); |
| 1921 | |
| 1922 | assert((size_t)(p - out) == len)((void) (0)); |
| 1923 | |
| 1924 | return (ngtcp2_ssize)len; |
| 1925 | } |
| 1926 | |
| 1927 | ngtcp2_ssize ngtcp2_pkt_encode_crypto_frame(uint8_t *out, size_t outlen, |
| 1928 | const ngtcp2_crypto *fr) { |
| 1929 | size_t len = 1; |
| 1930 | uint8_t *p; |
| 1931 | size_t i; |
| 1932 | size_t datalen = 0; |
| 1933 | |
| 1934 | len += ngtcp2_put_varint_len(fr->offset); |
| 1935 | |
| 1936 | for (i = 0; i < fr->datacnt; ++i) { |
| 1937 | datalen += fr->data[i].len; |
| 1938 | } |
| 1939 | |
| 1940 | len += ngtcp2_put_varint_len(datalen); |
| 1941 | len += datalen; |
| 1942 | |
| 1943 | if (outlen < len) { |
| 1944 | return NGTCP2_ERR_NOBUF-203; |
| 1945 | } |
| 1946 | |
| 1947 | p = out; |
| 1948 | |
| 1949 | *p++ = NGTCP2_FRAME_CRYPTO; |
| 1950 | |
| 1951 | p = ngtcp2_put_varint(p, fr->offset); |
| 1952 | p = ngtcp2_put_varint(p, datalen); |
| 1953 | |
| 1954 | for (i = 0; i < fr->datacnt; ++i) { |
| 1955 | assert(fr->data[i].base)((void) (0)); |
| 1956 | p = ngtcp2_cpymem(p, fr->data[i].base, fr->data[i].len); |
| 1957 | } |
| 1958 | |
| 1959 | assert((size_t)(p - out) == len)((void) (0)); |
| 1960 | |
| 1961 | return (ngtcp2_ssize)len; |
| 1962 | } |
| 1963 | |
| 1964 | ngtcp2_ssize ngtcp2_pkt_encode_new_token_frame(uint8_t *out, size_t outlen, |
| 1965 | const ngtcp2_new_token *fr) { |
| 1966 | size_t len = 1 + ngtcp2_put_varint_len(fr->token.len) + fr->token.len; |
| 1967 | uint8_t *p; |
| 1968 | |
| 1969 | assert(fr->token.len)((void) (0)); |
| 1970 | |
| 1971 | if (outlen < len) { |
| 1972 | return NGTCP2_ERR_NOBUF-203; |
| 1973 | } |
| 1974 | |
| 1975 | p = out; |
| 1976 | |
| 1977 | *p++ = NGTCP2_FRAME_NEW_TOKEN; |
| 1978 | |
| 1979 | p = ngtcp2_put_varint(p, fr->token.len); |
| 1980 | p = ngtcp2_cpymem(p, fr->token.base, fr->token.len); |
| 1981 | |
| 1982 | assert((size_t)(p - out) == len)((void) (0)); |
| 1983 | |
| 1984 | return (ngtcp2_ssize)len; |
| 1985 | } |
| 1986 | |
| 1987 | ngtcp2_ssize ngtcp2_pkt_encode_retire_connection_id_frame( |
| 1988 | uint8_t *out, size_t outlen, const ngtcp2_retire_connection_id *fr) { |
| 1989 | size_t len = 1 + ngtcp2_put_varint_len(fr->seq); |
| 1990 | uint8_t *p; |
| 1991 | |
| 1992 | if (outlen < len) { |
| 1993 | return NGTCP2_ERR_NOBUF-203; |
| 1994 | } |
| 1995 | |
| 1996 | p = out; |
| 1997 | |
| 1998 | *p++ = NGTCP2_FRAME_RETIRE_CONNECTION_ID; |
| 1999 | |
| 2000 | p = ngtcp2_put_varint(p, fr->seq); |
| 2001 | |
| 2002 | assert((size_t)(p - out) == len)((void) (0)); |
| 2003 | |
| 2004 | return (ngtcp2_ssize)len; |
| 2005 | } |
| 2006 | |
| 2007 | ngtcp2_ssize |
| 2008 | ngtcp2_pkt_encode_handshake_done_frame(uint8_t *out, size_t outlen, |
| 2009 | const ngtcp2_handshake_done *fr) { |
| 2010 | (void)fr; |
| 2011 | |
| 2012 | if (outlen < 1) { |
| 2013 | return NGTCP2_ERR_NOBUF-203; |
| 2014 | } |
| 2015 | |
| 2016 | *out++ = NGTCP2_FRAME_HANDSHAKE_DONE; |
| 2017 | |
| 2018 | return 1; |
| 2019 | } |
| 2020 | |
| 2021 | ngtcp2_ssize ngtcp2_pkt_encode_datagram_frame(uint8_t *out, size_t outlen, |
| 2022 | const ngtcp2_datagram *fr) { |
| 2023 | size_t datalen = ngtcp2_vec_len(fr->data, fr->datacnt); |
| 2024 | size_t len = |
| 2025 | 1 + |
| 2026 | (fr->type == NGTCP2_FRAME_DATAGRAM ? 0 : ngtcp2_put_varint_len(datalen)) + |
| 2027 | datalen; |
| 2028 | uint8_t *p; |
| 2029 | size_t i; |
| 2030 | |
| 2031 | assert(fr->type == NGTCP2_FRAME_DATAGRAM ||((void) (0)) |
| 2032 | fr->type == NGTCP2_FRAME_DATAGRAM_LEN)((void) (0)); |
| 2033 | |
| 2034 | if (outlen < len) { |
| 2035 | return NGTCP2_ERR_NOBUF-203; |
| 2036 | } |
| 2037 | |
| 2038 | p = out; |
| 2039 | |
| 2040 | *p++ = fr->type; |
| 2041 | if (fr->type == NGTCP2_FRAME_DATAGRAM_LEN) { |
| 2042 | p = ngtcp2_put_varint(p, (uint64_t)datalen); |
| 2043 | } |
| 2044 | |
| 2045 | for (i = 0; i < fr->datacnt; ++i) { |
| 2046 | assert(fr->data[i].len)((void) (0)); |
| 2047 | assert(fr->data[i].base)((void) (0)); |
| 2048 | p = ngtcp2_cpymem(p, fr->data[i].base, fr->data[i].len); |
| 2049 | } |
| 2050 | |
| 2051 | assert((size_t)(p - out) == len)((void) (0)); |
| 2052 | |
| 2053 | return (ngtcp2_ssize)len; |
| 2054 | } |
| 2055 | |
| 2056 | ngtcp2_ssize ngtcp2_pkt_write_version_negotiation( |
| 2057 | uint8_t *dest, size_t destlen, uint8_t unused_random, const uint8_t *dcid, |
| 2058 | size_t dcidlen, const uint8_t *scid, size_t scidlen, const uint32_t *sv, |
| 2059 | size_t nsv) { |
| 2060 | size_t len = 1 + 4 + 1 + dcidlen + 1 + scidlen + nsv * 4; |
| 2061 | uint8_t *p; |
| 2062 | size_t i; |
| 2063 | |
| 2064 | assert(dcidlen < 256)((void) (0)); |
| 2065 | assert(scidlen < 256)((void) (0)); |
| 2066 | |
| 2067 | if (destlen < len) { |
| 2068 | return NGTCP2_ERR_NOBUF-203; |
| 2069 | } |
| 2070 | |
| 2071 | p = dest; |
| 2072 | |
| 2073 | *p++ = 0x80 | unused_random; |
| 2074 | p = ngtcp2_put_uint32be(p, 0); |
| 2075 | *p++ = (uint8_t)dcidlen; |
| 2076 | if (dcidlen) { |
| 2077 | p = ngtcp2_cpymem(p, dcid, dcidlen); |
| 2078 | } |
| 2079 | *p++ = (uint8_t)scidlen; |
| 2080 | if (scidlen) { |
| 2081 | p = ngtcp2_cpymem(p, scid, scidlen); |
| 2082 | } |
| 2083 | |
| 2084 | for (i = 0; i < nsv; ++i) { |
| 2085 | p = ngtcp2_put_uint32be(p, sv[i]); |
| 2086 | } |
| 2087 | |
| 2088 | assert((size_t)(p - dest) == len)((void) (0)); |
| 2089 | |
| 2090 | return (ngtcp2_ssize)len; |
| 2091 | } |
| 2092 | |
| 2093 | size_t ngtcp2_pkt_decode_version_negotiation(uint32_t *dest, |
| 2094 | const uint8_t *payload, |
| 2095 | size_t payloadlen) { |
| 2096 | const uint8_t *end = payload + payloadlen; |
| 2097 | |
| 2098 | assert((payloadlen % sizeof(uint32_t)) == 0)((void) (0)); |
| 2099 | |
| 2100 | for (; payload != end; payload += sizeof(uint32_t)) { |
| 2101 | *dest++ = ngtcp2_get_uint32(payload); |
| 2102 | } |
| 2103 | |
| 2104 | return payloadlen / sizeof(uint32_t); |
| 2105 | } |
| 2106 | |
| 2107 | int ngtcp2_pkt_decode_stateless_reset(ngtcp2_pkt_stateless_reset *sr, |
| 2108 | const uint8_t *payload, |
| 2109 | size_t payloadlen) { |
| 2110 | const uint8_t *p = payload; |
| 2111 | |
| 2112 | if (payloadlen < |
| 2113 | NGTCP2_MIN_STATELESS_RESET_RANDLEN5 + NGTCP2_STATELESS_RESET_TOKENLEN16) { |
| 2114 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 2115 | } |
| 2116 | |
| 2117 | sr->rand = p; |
| 2118 | sr->randlen = payloadlen - NGTCP2_STATELESS_RESET_TOKENLEN16; |
| 2119 | p += sr->randlen; |
| 2120 | memcpy(sr->stateless_reset_token, p, NGTCP2_STATELESS_RESET_TOKENLEN16); |
| 2121 | |
| 2122 | return 0; |
| 2123 | } |
| 2124 | |
| 2125 | int ngtcp2_pkt_decode_retry(ngtcp2_pkt_retry *dest, const uint8_t *payload, |
| 2126 | size_t payloadlen) { |
| 2127 | size_t len = /* token */ 1 + NGTCP2_RETRY_TAGLEN16; |
| 2128 | |
| 2129 | if (payloadlen < len) { |
| 2130 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 2131 | } |
| 2132 | |
| 2133 | dest->token.base = (uint8_t *)payload; |
| 2134 | dest->token.len = (size_t)(payloadlen - NGTCP2_RETRY_TAGLEN16); |
| 2135 | ngtcp2_cpymem(dest->tag, payload + dest->token.len, NGTCP2_RETRY_TAGLEN16); |
| 2136 | |
| 2137 | return 0; |
| 2138 | } |
| 2139 | |
| 2140 | int64_t ngtcp2_pkt_adjust_pkt_num(int64_t max_pkt_num, int64_t pkt_num, |
| 2141 | size_t n) { |
| 2142 | int64_t expected = max_pkt_num + 1; |
| 2143 | int64_t win = (int64_t)1 << n; |
| 2144 | int64_t hwin = win / 2; |
| 2145 | int64_t mask = win - 1; |
| 2146 | int64_t cand = (expected & ~mask) | pkt_num; |
| 2147 | |
| 2148 | if (cand <= expected - hwin) { |
| 2149 | assert(cand <= (int64_t)NGTCP2_MAX_VARINT - win)((void) (0)); |
| 2150 | return cand + win; |
| 2151 | } |
| 2152 | if (cand > expected + hwin && cand >= win) { |
| 2153 | return cand - win; |
| 2154 | } |
| 2155 | return cand; |
| 2156 | } |
| 2157 | |
| 2158 | int ngtcp2_pkt_validate_ack(ngtcp2_ack *fr) { |
| 2159 | int64_t largest_ack = fr->largest_ack; |
| 2160 | size_t i; |
| 2161 | |
| 2162 | if (largest_ack < (int64_t)fr->first_ack_blklen) { |
| 2163 | return NGTCP2_ERR_ACK_FRAME-207; |
| 2164 | } |
| 2165 | |
| 2166 | largest_ack -= (int64_t)fr->first_ack_blklen; |
| 2167 | |
| 2168 | for (i = 0; i < fr->num_blks; ++i) { |
| 2169 | if (largest_ack < (int64_t)fr->blks[i].gap + 2) { |
| 2170 | return NGTCP2_ERR_ACK_FRAME-207; |
| 2171 | } |
| 2172 | |
| 2173 | largest_ack -= (int64_t)fr->blks[i].gap + 2; |
| 2174 | |
| 2175 | if (largest_ack < (int64_t)fr->blks[i].blklen) { |
| 2176 | return NGTCP2_ERR_ACK_FRAME-207; |
| 2177 | } |
| 2178 | |
| 2179 | largest_ack -= (int64_t)fr->blks[i].blklen; |
| 2180 | } |
| 2181 | |
| 2182 | return 0; |
| 2183 | } |
| 2184 | |
| 2185 | ngtcp2_ssize |
| 2186 | ngtcp2_pkt_write_stateless_reset(uint8_t *dest, size_t destlen, |
| 2187 | const uint8_t *stateless_reset_token, |
| 2188 | const uint8_t *rand, size_t randlen) { |
| 2189 | uint8_t *p; |
| 2190 | |
| 2191 | if (destlen < |
| 2192 | NGTCP2_MIN_STATELESS_RESET_RANDLEN5 + NGTCP2_STATELESS_RESET_TOKENLEN16) { |
| 2193 | return NGTCP2_ERR_NOBUF-203; |
| 2194 | } |
| 2195 | |
| 2196 | if (randlen < NGTCP2_MIN_STATELESS_RESET_RANDLEN5) { |
| 2197 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 2198 | } |
| 2199 | |
| 2200 | p = dest; |
| 2201 | |
| 2202 | randlen = ngtcp2_min(destlen - NGTCP2_STATELESS_RESET_TOKENLEN, randlen)((destlen - 16) < (randlen) ? (destlen - 16) : (randlen)); |
| 2203 | |
| 2204 | p = ngtcp2_cpymem(p, rand, randlen); |
| 2205 | p = ngtcp2_cpymem(p, stateless_reset_token, NGTCP2_STATELESS_RESET_TOKENLEN16); |
| 2206 | *dest = (uint8_t)((*dest & 0x7fu) | 0x40u); |
| 2207 | |
| 2208 | return p - dest; |
| 2209 | } |
| 2210 | |
| 2211 | ngtcp2_ssize ngtcp2_pkt_write_retry( |
| 2212 | uint8_t *dest, size_t destlen, uint32_t version, const ngtcp2_cid *dcid, |
| 2213 | const ngtcp2_cid *scid, const ngtcp2_cid *odcid, const uint8_t *token, |
| 2214 | size_t tokenlen, ngtcp2_encrypt encrypt, const ngtcp2_crypto_aead *aead, |
| 2215 | const ngtcp2_crypto_aead_ctx *aead_ctx) { |
| 2216 | ngtcp2_pkt_hd hd; |
| 2217 | uint8_t pseudo_retry[1500]; |
| 2218 | ngtcp2_ssize pseudo_retrylen; |
| 2219 | uint8_t tag[NGTCP2_RETRY_TAGLEN16]; |
| 2220 | int rv; |
| 2221 | uint8_t *p; |
| 2222 | size_t offset; |
| 2223 | const uint8_t *nonce; |
| 2224 | size_t noncelen; |
| 2225 | |
| 2226 | assert(tokenlen > 0)((void) (0)); |
| 2227 | assert(!ngtcp2_cid_eq(scid, odcid))((void) (0)); |
| 2228 | |
| 2229 | /* Retry packet is sent at most once per one connection attempt. In |
| 2230 | the first connection attempt, client has to send random DCID |
| 2231 | which is at least 8 bytes long. */ |
| 2232 | if (odcid->datalen < 8) { |
| 2233 | return NGTCP2_ERR_INVALID_ARGUMENT-201; |
| 2234 | } |
| 2235 | |
| 2236 | ngtcp2_pkt_hd_init(&hd, NGTCP2_PKT_FLAG_LONG_FORM0x01, NGTCP2_PKT_RETRY, dcid, |
| 2237 | scid, /* pkt_num = */ 0, /* pkt_numlen = */ 1, version, |
| 2238 | /* len = */ 0); |
| 2239 | |
| 2240 | pseudo_retrylen = |
| 2241 | ngtcp2_pkt_encode_pseudo_retry(pseudo_retry, sizeof(pseudo_retry), &hd, |
| 2242 | /* unused = */ 0, odcid, token, tokenlen); |
| 2243 | if (pseudo_retrylen < 0) { |
| 2244 | return pseudo_retrylen; |
| 2245 | } |
| 2246 | |
| 2247 | if (version == NGTCP2_PROTO_VER_V10x00000001u) { |
| 2248 | nonce = (const uint8_t *)NGTCP2_RETRY_NONCE_V1"\x46\x15\x99\xd3\x5d\x63\x2b\xf2\x23\x98\x25\xbb"; |
| 2249 | noncelen = sizeof(NGTCP2_RETRY_NONCE_V1"\x46\x15\x99\xd3\x5d\x63\x2b\xf2\x23\x98\x25\xbb") - 1; |
| 2250 | } else { |
| 2251 | nonce = (const uint8_t *)NGTCP2_RETRY_NONCE_DRAFT"\xe5\x49\x30\xf9\x7f\x21\x36\xf0\x53\x0a\x8c\x1c"; |
| 2252 | noncelen = sizeof(NGTCP2_RETRY_NONCE_DRAFT"\xe5\x49\x30\xf9\x7f\x21\x36\xf0\x53\x0a\x8c\x1c") - 1; |
| 2253 | } |
| 2254 | |
| 2255 | /* OpenSSL does not like NULL plaintext. */ |
| 2256 | rv = encrypt(tag, aead, aead_ctx, (const uint8_t *)"", 0, nonce, noncelen, |
| 2257 | pseudo_retry, (size_t)pseudo_retrylen); |
| 2258 | if (rv != 0) { |
| 2259 | return rv; |
| 2260 | } |
| 2261 | |
| 2262 | offset = 1 + odcid->datalen; |
| 2263 | if (destlen < (size_t)pseudo_retrylen + sizeof(tag) - offset) { |
| 2264 | return NGTCP2_ERR_NOBUF-203; |
| 2265 | } |
| 2266 | |
| 2267 | p = ngtcp2_cpymem(dest, pseudo_retry + offset, |
| 2268 | (size_t)pseudo_retrylen - offset); |
| 2269 | p = ngtcp2_cpymem(p, tag, sizeof(tag)); |
| 2270 | |
| 2271 | return p - dest; |
| 2272 | } |
| 2273 | |
| 2274 | ngtcp2_ssize ngtcp2_pkt_encode_pseudo_retry( |
| 2275 | uint8_t *dest, size_t destlen, const ngtcp2_pkt_hd *hd, uint8_t unused, |
| 2276 | const ngtcp2_cid *odcid, const uint8_t *token, size_t tokenlen) { |
| 2277 | uint8_t *p = dest; |
| 2278 | ngtcp2_ssize nwrite; |
| 2279 | |
| 2280 | if (destlen < 1 + odcid->datalen) { |
| 2281 | return NGTCP2_ERR_NOBUF-203; |
| 2282 | } |
| 2283 | |
| 2284 | *p++ = (uint8_t)odcid->datalen; |
| 2285 | p = ngtcp2_cpymem(p, odcid->data, odcid->datalen); |
| 2286 | destlen -= (size_t)(p - dest); |
| 2287 | |
| 2288 | nwrite = ngtcp2_pkt_encode_hd_long(p, destlen, hd); |
| 2289 | if (nwrite < 0) { |
| 2290 | return nwrite; |
| 2291 | } |
| 2292 | |
| 2293 | if (destlen < (size_t)nwrite + tokenlen) { |
| 2294 | return NGTCP2_ERR_NOBUF-203; |
| 2295 | } |
| 2296 | |
| 2297 | *p &= 0xf0; |
| 2298 | *p |= unused; |
| 2299 | |
| 2300 | p += nwrite; |
| 2301 | |
| 2302 | p = ngtcp2_cpymem(p, token, tokenlen); |
| 2303 | |
| 2304 | return p - dest; |
| 2305 | } |
| 2306 | |
| 2307 | int ngtcp2_pkt_verify_retry_tag(uint32_t version, const ngtcp2_pkt_retry *retry, |
| 2308 | const uint8_t *pkt, size_t pktlen, |
| 2309 | ngtcp2_encrypt encrypt, |
| 2310 | const ngtcp2_crypto_aead *aead, |
| 2311 | const ngtcp2_crypto_aead_ctx *aead_ctx) { |
| 2312 | uint8_t pseudo_retry[1500]; |
| 2313 | size_t pseudo_retrylen; |
| 2314 | uint8_t *p = pseudo_retry; |
| 2315 | int rv; |
| 2316 | uint8_t tag[NGTCP2_RETRY_TAGLEN16]; |
| 2317 | const uint8_t *nonce; |
| 2318 | size_t noncelen; |
| 2319 | |
| 2320 | assert(pktlen >= sizeof(retry->tag))((void) (0)); |
| 2321 | |
| 2322 | if (sizeof(pseudo_retry) < |
| 2323 | 1 + retry->odcid.datalen + pktlen - sizeof(retry->tag)) { |
| 2324 | return NGTCP2_ERR_PROTO-205; |
| 2325 | } |
| 2326 | |
| 2327 | *p++ = (uint8_t)retry->odcid.datalen; |
| 2328 | p = ngtcp2_cpymem(p, retry->odcid.data, retry->odcid.datalen); |
| 2329 | p = ngtcp2_cpymem(p, pkt, pktlen - sizeof(retry->tag)); |
| 2330 | |
| 2331 | pseudo_retrylen = (size_t)(p - pseudo_retry); |
| 2332 | |
| 2333 | if (version == NGTCP2_PROTO_VER_V10x00000001u) { |
| 2334 | nonce = (const uint8_t *)NGTCP2_RETRY_NONCE_V1"\x46\x15\x99\xd3\x5d\x63\x2b\xf2\x23\x98\x25\xbb"; |
| 2335 | noncelen = sizeof(NGTCP2_RETRY_NONCE_V1"\x46\x15\x99\xd3\x5d\x63\x2b\xf2\x23\x98\x25\xbb") - 1; |
| 2336 | } else { |
| 2337 | nonce = (const uint8_t *)NGTCP2_RETRY_NONCE_DRAFT"\xe5\x49\x30\xf9\x7f\x21\x36\xf0\x53\x0a\x8c\x1c"; |
| 2338 | noncelen = sizeof(NGTCP2_RETRY_NONCE_DRAFT"\xe5\x49\x30\xf9\x7f\x21\x36\xf0\x53\x0a\x8c\x1c") - 1; |
| 2339 | } |
| 2340 | |
| 2341 | /* OpenSSL does not like NULL plaintext. */ |
| 2342 | rv = encrypt(tag, aead, aead_ctx, (const uint8_t *)"", 0, nonce, noncelen, |
| 2343 | pseudo_retry, pseudo_retrylen); |
| 2344 | if (rv != 0) { |
| 2345 | return rv; |
| 2346 | } |
| 2347 | |
| 2348 | if (0 != memcmp(retry->tag, tag, sizeof(retry->tag))) { |
| 2349 | return NGTCP2_ERR_PROTO-205; |
| 2350 | } |
| 2351 | |
| 2352 | return 0; |
| 2353 | } |
| 2354 | |
| 2355 | size_t ngtcp2_pkt_stream_max_datalen(int64_t stream_id, uint64_t offset, |
| 2356 | size_t len, size_t left) { |
| 2357 | size_t n = 1 /* type */ + ngtcp2_put_varint_len((uint64_t)stream_id) + |
| 2358 | (offset ? ngtcp2_put_varint_len(offset) : 0); |
| 2359 | |
| 2360 | if (left <= n) { |
| 2361 | return (size_t)-1; |
| 2362 | } |
| 2363 | |
| 2364 | left -= n; |
| 2365 | |
| 2366 | if (left > 8 + 1073741823 && len > 1073741823) { |
| 2367 | #if SIZE_MAX(18446744073709551615UL) > UINT32_MAX(4294967295U) |
| 2368 | len = ngtcp2_min(len, 4611686018427387903lu)((len) < (4611686018427387903lu) ? (len) : (4611686018427387903lu )); |
| 2369 | #endif /* SIZE_MAX > UINT32_MAX */ |
| 2370 | return ngtcp2_min(len, left - 8)((len) < (left - 8) ? (len) : (left - 8)); |
| 2371 | } |
| 2372 | |
| 2373 | if (left > 4 + 16383 && len > 16383) { |
| 2374 | len = ngtcp2_min(len, 1073741823)((len) < (1073741823) ? (len) : (1073741823)); |
| 2375 | return ngtcp2_min(len, left - 4)((len) < (left - 4) ? (len) : (left - 4)); |
| 2376 | } |
| 2377 | |
| 2378 | if (left > 2 + 63 && len > 63) { |
| 2379 | len = ngtcp2_min(len, 16383)((len) < (16383) ? (len) : (16383)); |
| 2380 | return ngtcp2_min(len, left - 2)((len) < (left - 2) ? (len) : (left - 2)); |
| 2381 | } |
| 2382 | |
| 2383 | len = ngtcp2_min(len, 63)((len) < (63) ? (len) : (63)); |
| 2384 | return ngtcp2_min(len, left - 1)((len) < (left - 1) ? (len) : (left - 1)); |
| 2385 | } |
| 2386 | |
| 2387 | size_t ngtcp2_pkt_crypto_max_datalen(uint64_t offset, size_t len, size_t left) { |
| 2388 | size_t n = 1 /* type */ + ngtcp2_put_varint_len(offset); |
| 2389 | |
| 2390 | /* CRYPTO frame must contain nonzero length data. Return -1 if |
| 2391 | there is no space to write crypto data. */ |
| 2392 | if (left <= n + 1) { |
| 2393 | return (size_t)-1; |
| 2394 | } |
| 2395 | |
| 2396 | left -= n; |
| 2397 | |
| 2398 | if (left > 8 + 1073741823 && len > 1073741823) { |
| 2399 | #if SIZE_MAX(18446744073709551615UL) > UINT32_MAX(4294967295U) |
| 2400 | len = ngtcp2_min(len, 4611686018427387903lu)((len) < (4611686018427387903lu) ? (len) : (4611686018427387903lu )); |
| 2401 | #endif /* SIZE_MAX > UINT32_MAX */ |
| 2402 | return ngtcp2_min(len, left - 8)((len) < (left - 8) ? (len) : (left - 8)); |
| 2403 | } |
| 2404 | |
| 2405 | if (left > 4 + 16383 && len > 16383) { |
| 2406 | len = ngtcp2_min(len, 1073741823)((len) < (1073741823) ? (len) : (1073741823)); |
| 2407 | return ngtcp2_min(len, left - 4)((len) < (left - 4) ? (len) : (left - 4)); |
| 2408 | } |
| 2409 | |
| 2410 | if (left > 2 + 63 && len > 63) { |
| 2411 | len = ngtcp2_min(len, 16383)((len) < (16383) ? (len) : (16383)); |
| 2412 | return ngtcp2_min(len, left - 2)((len) < (left - 2) ? (len) : (left - 2)); |
| 2413 | } |
| 2414 | |
| 2415 | len = ngtcp2_min(len, 63)((len) < (63) ? (len) : (63)); |
| 2416 | return ngtcp2_min(len, left - 1)((len) < (left - 1) ? (len) : (left - 1)); |
| 2417 | } |
| 2418 | |
| 2419 | size_t ngtcp2_pkt_datagram_framelen(size_t len) { |
| 2420 | return 1 /* type */ + ngtcp2_put_varint_len((uint64_t)len) + len; |
| 2421 | } |
| 2422 | |
| 2423 | uint8_t ngtcp2_pkt_get_type_long(uint8_t c) { |
| 2424 | return (uint8_t)((c & NGTCP2_LONG_TYPE_MASK0x30) >> 4); |
| 2425 | } |
| 2426 | |
| 2427 | int ngtcp2_pkt_verify_reserved_bits(uint8_t c) { |
| 2428 | if (c & NGTCP2_HEADER_FORM_BIT0x80) { |
| 2429 | return (c & NGTCP2_LONG_RESERVED_BIT_MASK0x0c) == 0 ? 0 : NGTCP2_ERR_PROTO-205; |
| 2430 | } |
| 2431 | return (c & NGTCP2_SHORT_RESERVED_BIT_MASK0x18) == 0 ? 0 : NGTCP2_ERR_PROTO-205; |
| 2432 | } |