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src/event/quic/ngx_event_quic_transport.c - nginx source code
Global variables defined
Functions defined
Macros defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_event.h>
- #include <ngx_event_quic_connection.h>
- #define NGX_QUIC_LONG_DCID_LEN_OFFSET 5
- #define NGX_QUIC_LONG_DCID_OFFSET 6
- #define NGX_QUIC_SHORT_DCID_OFFSET 1
- #define NGX_QUIC_STREAM_FRAME_FIN 0x01
- #define NGX_QUIC_STREAM_FRAME_LEN 0x02
- #define NGX_QUIC_STREAM_FRAME_OFF 0x04
- #if (NGX_HAVE_NONALIGNED)
- #define ngx_quic_parse_uint16(p) ntohs(*(uint16_t *) (p))
- #define ngx_quic_parse_uint32(p) ntohl(*(uint32_t *) (p))
- #define ngx_quic_write_uint16 ngx_quic_write_uint16_aligned
- #define ngx_quic_write_uint32 ngx_quic_write_uint32_aligned
- #else
- #define ngx_quic_parse_uint16(p) ((p)[0] << 8 | (p)[1])
- #define ngx_quic_parse_uint32(p) \
- ((uint32_t) (p)[0] << 24 | (p)[1] << 16 | (p)[2] << 8 | (p)[3])
- #define ngx_quic_write_uint16(p, s) \
- ((p)[0] = (u_char) ((s) >> 8), \
- (p)[1] = (u_char) (s), \
- (p) + sizeof(uint16_t))
- #define ngx_quic_write_uint32(p, s) \
- ((p)[0] = (u_char) ((s) >> 24), \
- (p)[1] = (u_char) ((s) >> 16), \
- (p)[2] = (u_char) ((s) >> 8), \
- (p)[3] = (u_char) (s), \
- (p) + sizeof(uint32_t))
- #endif
- #define ngx_quic_write_uint64(p, s) \
- ((p)[0] = (u_char) ((s) >> 56), \
- (p)[1] = (u_char) ((s) >> 48), \
- (p)[2] = (u_char) ((s) >> 40), \
- (p)[3] = (u_char) ((s) >> 32), \
- (p)[4] = (u_char) ((s) >> 24), \
- (p)[5] = (u_char) ((s) >> 16), \
- (p)[6] = (u_char) ((s) >> 8), \
- (p)[7] = (u_char) (s), \
- (p) + sizeof(uint64_t))
- #define ngx_quic_write_uint24(p, s) \
- ((p)[0] = (u_char) ((s) >> 16), \
- (p)[1] = (u_char) ((s) >> 8), \
- (p)[2] = (u_char) (s), \
- (p) + 3)
- #define ngx_quic_write_uint16_aligned(p, s) \
- (*(uint16_t *) (p) = htons((uint16_t) (s)), (p) + sizeof(uint16_t))
- #define ngx_quic_write_uint32_aligned(p, s) \
- (*(uint32_t *) (p) = htonl((uint32_t) (s)), (p) + sizeof(uint32_t))
- #define ngx_quic_build_int_set(p, value, len, bits) \
- (*(p)++ = ((value >> ((len) * 8)) & 0xff) | ((bits) << 6))
- static u_char *ngx_quic_parse_int(u_char *pos, u_char *end, uint64_t *out);
- static ngx_uint_t ngx_quic_varint_len(uint64_t value);
- static void ngx_quic_build_int(u_char **pos, uint64_t value);
- static u_char *ngx_quic_read_uint8(u_char *pos, u_char *end, uint8_t *value);
- static u_char *ngx_quic_read_uint32(u_char *pos, u_char *end, uint32_t *value);
- static u_char *ngx_quic_read_bytes(u_char *pos, u_char *end, size_t len,
- u_char **out);
- static u_char *ngx_quic_copy_bytes(u_char *pos, u_char *end, size_t len,
- u_char *dst);
- static ngx_int_t ngx_quic_parse_short_header(ngx_quic_header_t *pkt,
- size_t dcid_len);
- static ngx_int_t ngx_quic_parse_long_header(ngx_quic_header_t *pkt);
- static ngx_int_t ngx_quic_supported_version(uint32_t version);
- static ngx_int_t ngx_quic_parse_long_header_v1(ngx_quic_header_t *pkt);
- static size_t ngx_quic_create_long_header(ngx_quic_header_t *pkt, u_char *out,
- u_char **pnp);
- static size_t ngx_quic_create_short_header(ngx_quic_header_t *pkt, u_char *out,
- u_char **pnp);
- static ngx_int_t ngx_quic_frame_allowed(ngx_quic_header_t *pkt,
- ngx_uint_t frame_type);
- static size_t ngx_quic_create_ping(u_char *p);
- static size_t ngx_quic_create_ack(u_char *p, ngx_quic_ack_frame_t *ack,
- ngx_chain_t *ranges);
- static size_t ngx_quic_create_reset_stream(u_char *p,
- ngx_quic_reset_stream_frame_t *rs);
- static size_t ngx_quic_create_stop_sending(u_char *p,
- ngx_quic_stop_sending_frame_t *ss);
- static size_t ngx_quic_create_crypto(u_char *p,
- ngx_quic_crypto_frame_t *crypto, ngx_chain_t *data);
- static size_t ngx_quic_create_hs_done(u_char *p);
- static size_t ngx_quic_create_new_token(u_char *p,
- ngx_quic_new_token_frame_t *token, ngx_chain_t *data);
- static size_t ngx_quic_create_stream(u_char *p, ngx_quic_stream_frame_t *sf,
- ngx_chain_t *data);
- static size_t ngx_quic_create_max_streams(u_char *p,
- ngx_quic_max_streams_frame_t *ms);
- static size_t ngx_quic_create_max_stream_data(u_char *p,
- ngx_quic_max_stream_data_frame_t *ms);
- static size_t ngx_quic_create_max_data(u_char *p,
- ngx_quic_max_data_frame_t *md);
- static size_t ngx_quic_create_path_challenge(u_char *p,
- ngx_quic_path_challenge_frame_t *pc);
- static size_t ngx_quic_create_path_response(u_char *p,
- ngx_quic_path_challenge_frame_t *pc);
- static size_t ngx_quic_create_new_connection_id(u_char *p,
- ngx_quic_new_conn_id_frame_t *rcid);
- static size_t ngx_quic_create_retire_connection_id(u_char *p,
- ngx_quic_retire_cid_frame_t *rcid);
- static size_t ngx_quic_create_close(u_char *p, ngx_quic_frame_t *f);
- static ngx_int_t ngx_quic_parse_transport_param(u_char *p, u_char *end,
- uint16_t id, ngx_quic_tp_t *dst);
- uint32_t ngx_quic_versions[] = {
-
- 0x00000001,
- };
- #define NGX_QUIC_NVERSIONS \
- (sizeof(ngx_quic_versions) / sizeof(ngx_quic_versions[0]))
- static ngx_inline u_char *
- ngx_quic_parse_int(u_char *pos, u_char *end, uint64_t *out)
- {
- u_char *p;
- uint64_t value;
- ngx_uint_t len;
- if (pos >= end) {
- return NULL;
- }
- p = pos;
- len = 1 << (*p >> 6);
- value = *p++ & 0x3f;
- if ((size_t)(end - p) < (len - 1)) {
- return NULL;
- }
- while (--len) {
- value = (value << 8) + *p++;
- }
- *out = value;
- return p;
- }
- static ngx_inline u_char *
- ngx_quic_read_uint8(u_char *pos, u_char *end, uint8_t *value)
- {
- if ((size_t)(end - pos) < 1) {
- return NULL;
- }
- *value = *pos;
- return pos + 1;
- }
- static ngx_inline u_char *
- ngx_quic_read_uint32(u_char *pos, u_char *end, uint32_t *value)
- {
- if ((size_t)(end - pos) < sizeof(uint32_t)) {
- return NULL;
- }
- *value = ngx_quic_parse_uint32(pos);
- return pos + sizeof(uint32_t);
- }
- static ngx_inline u_char *
- ngx_quic_read_bytes(u_char *pos, u_char *end, size_t len, u_char **out)
- {
- if ((size_t)(end - pos) < len) {
- return NULL;
- }
- *out = pos;
- return pos + len;
- }
- static u_char *
- ngx_quic_copy_bytes(u_char *pos, u_char *end, size_t len, u_char *dst)
- {
- if ((size_t)(end - pos) < len) {
- return NULL;
- }
- ngx_memcpy(dst, pos, len);
- return pos + len;
- }
- static ngx_inline ngx_uint_t
- ngx_quic_varint_len(uint64_t value)
- {
- if (value < (1 << 6)) {
- return 1;
- }
- if (value < (1 << 14)) {
- return 2;
- }
- if (value < (1 << 30)) {
- return 4;
- }
- return 8;
- }
- static ngx_inline void
- ngx_quic_build_int(u_char **pos, uint64_t value)
- {
- u_char *p;
- p = *pos;
- if (value < (1 << 6)) {
- ngx_quic_build_int_set(p, value, 0, 0);
- } else if (value < (1 << 14)) {
- ngx_quic_build_int_set(p, value, 1, 1);
- ngx_quic_build_int_set(p, value, 0, 0);
- } else if (value < (1 << 30)) {
- ngx_quic_build_int_set(p, value, 3, 2);
- ngx_quic_build_int_set(p, value, 2, 0);
- ngx_quic_build_int_set(p, value, 1, 0);
- ngx_quic_build_int_set(p, value, 0, 0);
- } else {
- ngx_quic_build_int_set(p, value, 7, 3);
- ngx_quic_build_int_set(p, value, 6, 0);
- ngx_quic_build_int_set(p, value, 5, 0);
- ngx_quic_build_int_set(p, value, 4, 0);
- ngx_quic_build_int_set(p, value, 3, 0);
- ngx_quic_build_int_set(p, value, 2, 0);
- ngx_quic_build_int_set(p, value, 1, 0);
- ngx_quic_build_int_set(p, value, 0, 0);
- }
- *pos = p;
- }
- ngx_int_t
- ngx_quic_parse_packet(ngx_quic_header_t *pkt)
- {
- if (!ngx_quic_long_pkt(pkt->flags)) {
- pkt->level = ssl_encryption_application;
- if (ngx_quic_parse_short_header(pkt, NGX_QUIC_SERVER_CID_LEN) != NGX_OK)
- {
- return NGX_ERROR;
- }
- return NGX_OK;
- }
- if (ngx_quic_parse_long_header(pkt) != NGX_OK) {
- return NGX_ERROR;
- }
- if (!ngx_quic_supported_version(pkt->version)) {
- return NGX_ABORT;
- }
- if (ngx_quic_parse_long_header_v1(pkt) != NGX_OK) {
- return NGX_ERROR;
- }
- return NGX_OK;
- }
- static ngx_int_t
- ngx_quic_parse_short_header(ngx_quic_header_t *pkt, size_t dcid_len)
- {
- u_char *p, *end;
- p = pkt->raw->pos;
- end = pkt->data + pkt->len;
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, pkt->log, 0,
- "quic packet rx short flags:%xd", pkt->flags);
- if (!(pkt->flags & NGX_QUIC_PKT_FIXED_BIT)) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0, "quic fixed bit is not set");
- return NGX_ERROR;
- }
- pkt->dcid.len = dcid_len;
- p = ngx_quic_read_bytes(p, end, dcid_len, &pkt->dcid.data);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic packet is too small to read dcid");
- return NGX_ERROR;
- }
- pkt->raw->pos = p;
- return NGX_OK;
- }
- static ngx_int_t
- ngx_quic_parse_long_header(ngx_quic_header_t *pkt)
- {
- u_char *p, *end;
- uint8_t idlen;
- p = pkt->raw->pos;
- end = pkt->data + pkt->len;
- p = ngx_quic_read_uint32(p, end, &pkt->version);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic packet is too small to read version");
- return NGX_ERROR;
- }
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, pkt->log, 0,
- "quic packet rx long flags:%xd version:%xD",
- pkt->flags, pkt->version);
- if (!(pkt->flags & NGX_QUIC_PKT_FIXED_BIT)) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0, "quic fixed bit is not set");
- return NGX_ERROR;
- }
- p = ngx_quic_read_uint8(p, end, &idlen);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic packet is too small to read dcid len");
- return NGX_ERROR;
- }
- if (idlen > NGX_QUIC_CID_LEN_MAX) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic packet dcid is too long");
- return NGX_ERROR;
- }
- pkt->dcid.len = idlen;
- p = ngx_quic_read_bytes(p, end, idlen, &pkt->dcid.data);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic packet is too small to read dcid");
- return NGX_ERROR;
- }
- p = ngx_quic_read_uint8(p, end, &idlen);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic packet is too small to read scid len");
- return NGX_ERROR;
- }
- if (idlen > NGX_QUIC_CID_LEN_MAX) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic packet scid is too long");
- return NGX_ERROR;
- }
- pkt->scid.len = idlen;
- p = ngx_quic_read_bytes(p, end, idlen, &pkt->scid.data);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic packet is too small to read scid");
- return NGX_ERROR;
- }
- pkt->raw->pos = p;
- return NGX_OK;
- }
- static ngx_int_t
- ngx_quic_supported_version(uint32_t version)
- {
- ngx_uint_t i;
- for (i = 0; i < NGX_QUIC_NVERSIONS; i++) {
- if (ngx_quic_versions[i] == version) {
- return 1;
- }
- }
- return 0;
- }
- static ngx_int_t
- ngx_quic_parse_long_header_v1(ngx_quic_header_t *pkt)
- {
- u_char *p, *end;
- uint64_t varint;
- p = pkt->raw->pos;
- end = pkt->raw->last;
- pkt->log->action = "parsing quic long header";
- if (ngx_quic_pkt_in(pkt->flags)) {
- if (pkt->len < NGX_QUIC_MIN_INITIAL_SIZE) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic UDP datagram is too small for initial packet");
- return NGX_DECLINED;
- }
- p = ngx_quic_parse_int(p, end, &varint);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic failed to parse token length");
- return NGX_ERROR;
- }
- pkt->token.len = varint;
- p = ngx_quic_read_bytes(p, end, pkt->token.len, &pkt->token.data);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic packet too small to read token data");
- return NGX_ERROR;
- }
- pkt->level = ssl_encryption_initial;
- } else if (ngx_quic_pkt_zrtt(pkt->flags)) {
- pkt->level = ssl_encryption_early_data;
- } else if (ngx_quic_pkt_hs(pkt->flags)) {
- pkt->level = ssl_encryption_handshake;
- } else {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic bad packet type");
- return NGX_DECLINED;
- }
- p = ngx_quic_parse_int(p, end, &varint);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0, "quic bad packet length");
- return NGX_ERROR;
- }
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, pkt->log, 0,
- "quic packet rx %s len:%uL",
- ngx_quic_level_name(pkt->level), varint);
- if (varint > (uint64_t) ((pkt->data + pkt->len) - p)) {
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0, "quic truncated %s packet",
- ngx_quic_level_name(pkt->level));
- return NGX_ERROR;
- }
- pkt->raw->pos = p;
- pkt->len = p + varint - pkt->data;
- return NGX_OK;
- }
- ngx_int_t
- ngx_quic_get_packet_dcid(ngx_log_t *log, u_char *data, size_t n,
- ngx_str_t *dcid)
- {
- size_t len, offset;
- if (n == 0) {
- goto failed;
- }
- if (ngx_quic_long_pkt(*data)) {
- if (n < NGX_QUIC_LONG_DCID_LEN_OFFSET + 1) {
- goto failed;
- }
- len = data[NGX_QUIC_LONG_DCID_LEN_OFFSET];
- offset = NGX_QUIC_LONG_DCID_OFFSET;
- } else {
- len = NGX_QUIC_SERVER_CID_LEN;
- offset = NGX_QUIC_SHORT_DCID_OFFSET;
- }
- if (n < len + offset) {
- goto failed;
- }
- dcid->len = len;
- dcid->data = &data[offset];
- return NGX_OK;
- failed:
- ngx_log_debug0(NGX_LOG_DEBUG_EVENT, log, 0, "quic malformed packet");
- return NGX_ERROR;
- }
- size_t
- ngx_quic_create_version_negotiation(ngx_quic_header_t *pkt, u_char *out)
- {
- u_char *p, *start;
- ngx_uint_t i;
- p = start = out;
- *p++ = pkt->flags;
-
- p = ngx_quic_write_uint32(p, 0);
- *p++ = pkt->dcid.len;
- p = ngx_cpymem(p, pkt->dcid.data, pkt->dcid.len);
- *p++ = pkt->scid.len;
- p = ngx_cpymem(p, pkt->scid.data, pkt->scid.len);
- for (i = 0; i < NGX_QUIC_NVERSIONS; i++) {
- p = ngx_quic_write_uint32(p, ngx_quic_versions[i]);
- }
- return p - start;
- }
- size_t
- ngx_quic_payload_size(ngx_quic_header_t *pkt, size_t pkt_len)
- {
- size_t len;
- if (ngx_quic_short_pkt(pkt->flags)) {
- len = 1 + pkt->dcid.len + pkt->num_len + NGX_QUIC_TAG_LEN;
- if (len > pkt_len) {
- return 0;
- }
- return pkt_len - len;
- }
-
- len = 5 + 2 + pkt->dcid.len + pkt->scid.len
- + (pkt->level == ssl_encryption_initial ? 1 : 0);
- if (len > pkt_len) {
- return 0;
- }
-
- len += ngx_quic_varint_len(pkt_len - len)
- + pkt->num_len + NGX_QUIC_TAG_LEN;
- if (len > pkt_len) {
- return 0;
- }
- return pkt_len - len;
- }
- size_t
- ngx_quic_create_header(ngx_quic_header_t *pkt, u_char *out, u_char **pnp)
- {
- return ngx_quic_short_pkt(pkt->flags)
- ? ngx_quic_create_short_header(pkt, out, pnp)
- : ngx_quic_create_long_header(pkt, out, pnp);
- }
- static size_t
- ngx_quic_create_long_header(ngx_quic_header_t *pkt, u_char *out,
- u_char **pnp)
- {
- size_t rem_len;
- u_char *p, *start;
- rem_len = pkt->num_len + pkt->payload.len + NGX_QUIC_TAG_LEN;
- if (out == NULL) {
- return 5 + 2 + pkt->dcid.len + pkt->scid.len
- + ngx_quic_varint_len(rem_len) + pkt->num_len
- + (pkt->level == ssl_encryption_initial ? 1 : 0);
- }
- p = start = out;
- *p++ = pkt->flags;
- p = ngx_quic_write_uint32(p, pkt->version);
- *p++ = pkt->dcid.len;
- p = ngx_cpymem(p, pkt->dcid.data, pkt->dcid.len);
- *p++ = pkt->scid.len;
- p = ngx_cpymem(p, pkt->scid.data, pkt->scid.len);
- if (pkt->level == ssl_encryption_initial) {
- ngx_quic_build_int(&p, 0);
- }
- ngx_quic_build_int(&p, rem_len);
- *pnp = p;
- switch (pkt->num_len) {
- case 1:
- *p++ = pkt->trunc;
- break;
- case 2:
- p = ngx_quic_write_uint16(p, pkt->trunc);
- break;
- case 3:
- p = ngx_quic_write_uint24(p, pkt->trunc);
- break;
- case 4:
- p = ngx_quic_write_uint32(p, pkt->trunc);
- break;
- }
- return p - start;
- }
- static size_t
- ngx_quic_create_short_header(ngx_quic_header_t *pkt, u_char *out,
- u_char **pnp)
- {
- u_char *p, *start;
- if (out == NULL) {
- return 1 + pkt->dcid.len + pkt->num_len;
- }
- p = start = out;
- *p++ = pkt->flags;
- p = ngx_cpymem(p, pkt->dcid.data, pkt->dcid.len);
- *pnp = p;
- switch (pkt->num_len) {
- case 1:
- *p++ = pkt->trunc;
- break;
- case 2:
- p = ngx_quic_write_uint16(p, pkt->trunc);
- break;
- case 3:
- p = ngx_quic_write_uint24(p, pkt->trunc);
- break;
- case 4:
- p = ngx_quic_write_uint32(p, pkt->trunc);
- break;
- }
- return p - start;
- }
- size_t
- ngx_quic_create_retry_itag(ngx_quic_header_t *pkt, u_char *out,
- u_char **start)
- {
- u_char *p;
- p = out;
- *p++ = pkt->odcid.len;
- p = ngx_cpymem(p, pkt->odcid.data, pkt->odcid.len);
- *start = p;
- *p++ = 0xff;
- p = ngx_quic_write_uint32(p, pkt->version);
- *p++ = pkt->dcid.len;
- p = ngx_cpymem(p, pkt->dcid.data, pkt->dcid.len);
- *p++ = pkt->scid.len;
- p = ngx_cpymem(p, pkt->scid.data, pkt->scid.len);
- p = ngx_cpymem(p, pkt->token.data, pkt->token.len);
- return p - out;
- }
- ssize_t
- ngx_quic_parse_frame(ngx_quic_header_t *pkt, u_char *start, u_char *end,
- ngx_quic_frame_t *f)
- {
- u_char *p;
- uint64_t varint;
- ngx_buf_t *b;
- ngx_uint_t i;
- b = f->data->buf;
- p = start;
- p = ngx_quic_parse_int(p, end, &varint);
- if (p == NULL) {
- pkt->error = NGX_QUIC_ERR_FRAME_ENCODING_ERROR;
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic failed to obtain quic frame type");
- return NGX_ERROR;
- }
- if (varint > NGX_QUIC_FT_LAST) {
- pkt->error = NGX_QUIC_ERR_FRAME_ENCODING_ERROR;
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic unknown frame type 0x%xL", varint);
- return NGX_ERROR;
- }
- f->type = varint;
- if (ngx_quic_frame_allowed(pkt, f->type) != NGX_OK) {
- pkt->error = NGX_QUIC_ERR_PROTOCOL_VIOLATION;
- return NGX_ERROR;
- }
- switch (f->type) {
- case NGX_QUIC_FT_CRYPTO:
- p = ngx_quic_parse_int(p, end, &f->u.crypto.offset);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.crypto.length);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_read_bytes(p, end, f->u.crypto.length, &b->pos);
- if (p == NULL) {
- goto error;
- }
- b->last = p;
- break;
- case NGX_QUIC_FT_PADDING:
- while (p < end && *p == NGX_QUIC_FT_PADDING) {
- p++;
- }
- break;
- case NGX_QUIC_FT_ACK:
- case NGX_QUIC_FT_ACK_ECN:
- p = ngx_quic_parse_int(p, end, &f->u.ack.largest);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.ack.delay);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.ack.range_count);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.ack.first_range);
- if (p == NULL) {
- goto error;
- }
- b->pos = p;
-
- for (i = 0; i < f->u.ack.range_count; i++) {
- p = ngx_quic_parse_int(p, end, &varint);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &varint);
- if (p == NULL) {
- goto error;
- }
- }
- b->last = p;
- f->u.ack.ranges_length = b->last - b->pos;
- if (f->type == NGX_QUIC_FT_ACK_ECN) {
- p = ngx_quic_parse_int(p, end, &f->u.ack.ect0);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.ack.ect1);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.ack.ce);
- if (p == NULL) {
- goto error;
- }
- ngx_log_debug3(NGX_LOG_DEBUG_EVENT, pkt->log, 0,
- "quic ACK ECN counters ect0:%uL ect1:%uL ce:%uL",
- f->u.ack.ect0, f->u.ack.ect1, f->u.ack.ce);
- }
- break;
- case NGX_QUIC_FT_PING:
- break;
- case NGX_QUIC_FT_NEW_CONNECTION_ID:
- p = ngx_quic_parse_int(p, end, &f->u.ncid.seqnum);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.ncid.retire);
- if (p == NULL) {
- goto error;
- }
- if (f->u.ncid.retire > f->u.ncid.seqnum) {
- goto error;
- }
- p = ngx_quic_read_uint8(p, end, &f->u.ncid.len);
- if (p == NULL) {
- goto error;
- }
- if (f->u.ncid.len < 1 || f->u.ncid.len > NGX_QUIC_CID_LEN_MAX) {
- goto error;
- }
- p = ngx_quic_copy_bytes(p, end, f->u.ncid.len, f->u.ncid.cid);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_copy_bytes(p, end, NGX_QUIC_SR_TOKEN_LEN, f->u.ncid.srt);
- if (p == NULL) {
- goto error;
- }
- break;
- case NGX_QUIC_FT_RETIRE_CONNECTION_ID:
- p = ngx_quic_parse_int(p, end, &f->u.retire_cid.sequence_number);
- if (p == NULL) {
- goto error;
- }
- break;
- case NGX_QUIC_FT_CONNECTION_CLOSE:
- case NGX_QUIC_FT_CONNECTION_CLOSE_APP:
- p = ngx_quic_parse_int(p, end, &f->u.close.error_code);
- if (p == NULL) {
- goto error;
- }
- if (f->type == NGX_QUIC_FT_CONNECTION_CLOSE) {
- p = ngx_quic_parse_int(p, end, &f->u.close.frame_type);
- if (p == NULL) {
- goto error;
- }
- }
- p = ngx_quic_parse_int(p, end, &varint);
- if (p == NULL) {
- goto error;
- }
- f->u.close.reason.len = varint;
- p = ngx_quic_read_bytes(p, end, f->u.close.reason.len,
- &f->u.close.reason.data);
- if (p == NULL) {
- goto error;
- }
- break;
- case NGX_QUIC_FT_STREAM:
- case NGX_QUIC_FT_STREAM1:
- case NGX_QUIC_FT_STREAM2:
- case NGX_QUIC_FT_STREAM3:
- case NGX_QUIC_FT_STREAM4:
- case NGX_QUIC_FT_STREAM5:
- case NGX_QUIC_FT_STREAM6:
- case NGX_QUIC_FT_STREAM7:
- f->u.stream.fin = (f->type & NGX_QUIC_STREAM_FRAME_FIN) ? 1 : 0;
- p = ngx_quic_parse_int(p, end, &f->u.stream.stream_id);
- if (p == NULL) {
- goto error;
- }
- if (f->type & NGX_QUIC_STREAM_FRAME_OFF) {
- f->u.stream.off = 1;
- p = ngx_quic_parse_int(p, end, &f->u.stream.offset);
- if (p == NULL) {
- goto error;
- }
- } else {
- f->u.stream.off = 0;
- f->u.stream.offset = 0;
- }
- if (f->type & NGX_QUIC_STREAM_FRAME_LEN) {
- f->u.stream.len = 1;
- p = ngx_quic_parse_int(p, end, &f->u.stream.length);
- if (p == NULL) {
- goto error;
- }
- } else {
- f->u.stream.len = 0;
- f->u.stream.length = end - p;
- }
- p = ngx_quic_read_bytes(p, end, f->u.stream.length, &b->pos);
- if (p == NULL) {
- goto error;
- }
- b->last = p;
- f->type = NGX_QUIC_FT_STREAM;
- break;
- case NGX_QUIC_FT_MAX_DATA:
- p = ngx_quic_parse_int(p, end, &f->u.max_data.max_data);
- if (p == NULL) {
- goto error;
- }
- break;
- case NGX_QUIC_FT_RESET_STREAM:
- p = ngx_quic_parse_int(p, end, &f->u.reset_stream.id);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.reset_stream.error_code);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.reset_stream.final_size);
- if (p == NULL) {
- goto error;
- }
- break;
- case NGX_QUIC_FT_STOP_SENDING:
- p = ngx_quic_parse_int(p, end, &f->u.stop_sending.id);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.stop_sending.error_code);
- if (p == NULL) {
- goto error;
- }
- break;
- case NGX_QUIC_FT_STREAMS_BLOCKED:
- case NGX_QUIC_FT_STREAMS_BLOCKED2:
- p = ngx_quic_parse_int(p, end, &f->u.streams_blocked.limit);
- if (p == NULL) {
- goto error;
- }
- if (f->u.streams_blocked.limit > 0x1000000000000000) {
- goto error;
- }
- f->u.streams_blocked.bidi =
- (f->type == NGX_QUIC_FT_STREAMS_BLOCKED) ? 1 : 0;
- break;
- case NGX_QUIC_FT_MAX_STREAMS:
- case NGX_QUIC_FT_MAX_STREAMS2:
- p = ngx_quic_parse_int(p, end, &f->u.max_streams.limit);
- if (p == NULL) {
- goto error;
- }
- if (f->u.max_streams.limit > 0x1000000000000000) {
- goto error;
- }
- f->u.max_streams.bidi = (f->type == NGX_QUIC_FT_MAX_STREAMS) ? 1 : 0;
- break;
- case NGX_QUIC_FT_MAX_STREAM_DATA:
- p = ngx_quic_parse_int(p, end, &f->u.max_stream_data.id);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.max_stream_data.limit);
- if (p == NULL) {
- goto error;
- }
- break;
- case NGX_QUIC_FT_DATA_BLOCKED:
- p = ngx_quic_parse_int(p, end, &f->u.data_blocked.limit);
- if (p == NULL) {
- goto error;
- }
- break;
- case NGX_QUIC_FT_STREAM_DATA_BLOCKED:
- p = ngx_quic_parse_int(p, end, &f->u.stream_data_blocked.id);
- if (p == NULL) {
- goto error;
- }
- p = ngx_quic_parse_int(p, end, &f->u.stream_data_blocked.limit);
- if (p == NULL) {
- goto error;
- }
- break;
- case NGX_QUIC_FT_PATH_CHALLENGE:
- p = ngx_quic_copy_bytes(p, end, 8, f->u.path_challenge.data);
- if (p == NULL) {
- goto error;
- }
- break;
- case NGX_QUIC_FT_PATH_RESPONSE:
- p = ngx_quic_copy_bytes(p, end, 8, f->u.path_response.data);
- if (p == NULL) {
- goto error;
- }
- break;
- default:
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic unknown frame type 0x%xi", f->type);
- return NGX_ERROR;
- }
- f->level = pkt->level;
- #if (NGX_DEBUG)
- f->pnum = pkt->pn;
- #endif
- return p - start;
- error:
- pkt->error = NGX_QUIC_ERR_FRAME_ENCODING_ERROR;
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic failed to parse frame type:0x%xi", f->type);
- return NGX_ERROR;
- }
- static ngx_int_t
- ngx_quic_frame_allowed(ngx_quic_header_t *pkt, ngx_uint_t frame_type)
- {
- uint8_t ptype;
-
- static uint8_t ngx_quic_frame_masks[] = {
- 0xF,
- 0xF,
- 0xD,
- 0xD,
- 0x3,
- 0x3,
- 0xD,
- 0x0,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x3,
- 0x1,
- 0xF,
- 0x3,
- 0x0,
- };
- if (ngx_quic_long_pkt(pkt->flags)) {
- if (ngx_quic_pkt_in(pkt->flags)) {
- ptype = 8;
- } else if (ngx_quic_pkt_hs(pkt->flags)) {
- ptype = 4;
- } else {
- ptype = 2;
- }
- } else {
- ptype = 1;
- }
- if (ptype & ngx_quic_frame_masks[frame_type]) {
- return NGX_OK;
- }
- ngx_log_error(NGX_LOG_INFO, pkt->log, 0,
- "quic frame type 0x%xi is not "
- "allowed in packet with flags 0x%xd",
- frame_type, pkt->flags);
- return NGX_DECLINED;
- }
- ssize_t
- ngx_quic_parse_ack_range(ngx_log_t *log, u_char *start, u_char *end,
- uint64_t *gap, uint64_t *range)
- {
- u_char *p;
- p = start;
- p = ngx_quic_parse_int(p, end, gap);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, log, 0,
- "quic failed to parse ack frame gap");
- return NGX_ERROR;
- }
- p = ngx_quic_parse_int(p, end, range);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, log, 0,
- "quic failed to parse ack frame range");
- return NGX_ERROR;
- }
- return p - start;
- }
- size_t
- ngx_quic_create_ack_range(u_char *p, uint64_t gap, uint64_t range)
- {
- size_t len;
- u_char *start;
- if (p == NULL) {
- len = ngx_quic_varint_len(gap);
- len += ngx_quic_varint_len(range);
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, gap);
- ngx_quic_build_int(&p, range);
- return p - start;
- }
- ssize_t
- ngx_quic_create_frame(u_char *p, ngx_quic_frame_t *f)
- {
-
- f->need_ack = 1;
- switch (f->type) {
- case NGX_QUIC_FT_PING:
- return ngx_quic_create_ping(p);
- case NGX_QUIC_FT_ACK:
- f->need_ack = 0;
- return ngx_quic_create_ack(p, &f->u.ack, f->data);
- case NGX_QUIC_FT_RESET_STREAM:
- return ngx_quic_create_reset_stream(p, &f->u.reset_stream);
- case NGX_QUIC_FT_STOP_SENDING:
- return ngx_quic_create_stop_sending(p, &f->u.stop_sending);
- case NGX_QUIC_FT_CRYPTO:
- return ngx_quic_create_crypto(p, &f->u.crypto, f->data);
- case NGX_QUIC_FT_HANDSHAKE_DONE:
- return ngx_quic_create_hs_done(p);
- case NGX_QUIC_FT_NEW_TOKEN:
- return ngx_quic_create_new_token(p, &f->u.token, f->data);
- case NGX_QUIC_FT_STREAM:
- return ngx_quic_create_stream(p, &f->u.stream, f->data);
- case NGX_QUIC_FT_CONNECTION_CLOSE:
- case NGX_QUIC_FT_CONNECTION_CLOSE_APP:
- f->need_ack = 0;
- return ngx_quic_create_close(p, f);
- case NGX_QUIC_FT_MAX_STREAMS:
- return ngx_quic_create_max_streams(p, &f->u.max_streams);
- case NGX_QUIC_FT_MAX_STREAM_DATA:
- return ngx_quic_create_max_stream_data(p, &f->u.max_stream_data);
- case NGX_QUIC_FT_MAX_DATA:
- return ngx_quic_create_max_data(p, &f->u.max_data);
- case NGX_QUIC_FT_PATH_CHALLENGE:
- return ngx_quic_create_path_challenge(p, &f->u.path_challenge);
- case NGX_QUIC_FT_PATH_RESPONSE:
- return ngx_quic_create_path_response(p, &f->u.path_response);
- case NGX_QUIC_FT_NEW_CONNECTION_ID:
- return ngx_quic_create_new_connection_id(p, &f->u.ncid);
- case NGX_QUIC_FT_RETIRE_CONNECTION_ID:
- return ngx_quic_create_retire_connection_id(p, &f->u.retire_cid);
- default:
-
- return NGX_ERROR;
- }
- }
- static size_t
- ngx_quic_create_ping(u_char *p)
- {
- u_char *start;
- if (p == NULL) {
- return ngx_quic_varint_len(NGX_QUIC_FT_PING);
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_PING);
- return p - start;
- }
- static size_t
- ngx_quic_create_ack(u_char *p, ngx_quic_ack_frame_t *ack, ngx_chain_t *ranges)
- {
- size_t len;
- u_char *start;
- ngx_buf_t *b;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_ACK);
- len += ngx_quic_varint_len(ack->largest);
- len += ngx_quic_varint_len(ack->delay);
- len += ngx_quic_varint_len(ack->range_count);
- len += ngx_quic_varint_len(ack->first_range);
- len += ack->ranges_length;
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_ACK);
- ngx_quic_build_int(&p, ack->largest);
- ngx_quic_build_int(&p, ack->delay);
- ngx_quic_build_int(&p, ack->range_count);
- ngx_quic_build_int(&p, ack->first_range);
- while (ranges) {
- b = ranges->buf;
- p = ngx_cpymem(p, b->pos, b->last - b->pos);
- ranges = ranges->next;
- }
- return p - start;
- }
- static size_t
- ngx_quic_create_reset_stream(u_char *p, ngx_quic_reset_stream_frame_t *rs)
- {
- size_t len;
- u_char *start;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_RESET_STREAM);
- len += ngx_quic_varint_len(rs->id);
- len += ngx_quic_varint_len(rs->error_code);
- len += ngx_quic_varint_len(rs->final_size);
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_RESET_STREAM);
- ngx_quic_build_int(&p, rs->id);
- ngx_quic_build_int(&p, rs->error_code);
- ngx_quic_build_int(&p, rs->final_size);
- return p - start;
- }
- static size_t
- ngx_quic_create_stop_sending(u_char *p, ngx_quic_stop_sending_frame_t *ss)
- {
- size_t len;
- u_char *start;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_STOP_SENDING);
- len += ngx_quic_varint_len(ss->id);
- len += ngx_quic_varint_len(ss->error_code);
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_STOP_SENDING);
- ngx_quic_build_int(&p, ss->id);
- ngx_quic_build_int(&p, ss->error_code);
- return p - start;
- }
- static size_t
- ngx_quic_create_crypto(u_char *p, ngx_quic_crypto_frame_t *crypto,
- ngx_chain_t *data)
- {
- size_t len;
- u_char *start;
- ngx_buf_t *b;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_CRYPTO);
- len += ngx_quic_varint_len(crypto->offset);
- len += ngx_quic_varint_len(crypto->length);
- len += crypto->length;
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_CRYPTO);
- ngx_quic_build_int(&p, crypto->offset);
- ngx_quic_build_int(&p, crypto->length);
- while (data) {
- b = data->buf;
- p = ngx_cpymem(p, b->pos, b->last - b->pos);
- data = data->next;
- }
- return p - start;
- }
- static size_t
- ngx_quic_create_hs_done(u_char *p)
- {
- u_char *start;
- if (p == NULL) {
- return ngx_quic_varint_len(NGX_QUIC_FT_HANDSHAKE_DONE);
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_HANDSHAKE_DONE);
- return p - start;
- }
- static size_t
- ngx_quic_create_new_token(u_char *p, ngx_quic_new_token_frame_t *token,
- ngx_chain_t *data)
- {
- size_t len;
- u_char *start;
- ngx_buf_t *b;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_NEW_TOKEN);
- len += ngx_quic_varint_len(token->length);
- len += token->length;
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_NEW_TOKEN);
- ngx_quic_build_int(&p, token->length);
- while (data) {
- b = data->buf;
- p = ngx_cpymem(p, b->pos, b->last - b->pos);
- data = data->next;
- }
- return p - start;
- }
- static size_t
- ngx_quic_create_stream(u_char *p, ngx_quic_stream_frame_t *sf,
- ngx_chain_t *data)
- {
- size_t len;
- u_char *start, type;
- ngx_buf_t *b;
- type = NGX_QUIC_FT_STREAM;
- if (sf->off) {
- type |= NGX_QUIC_STREAM_FRAME_OFF;
- }
- if (sf->len) {
- type |= NGX_QUIC_STREAM_FRAME_LEN;
- }
- if (sf->fin) {
- type |= NGX_QUIC_STREAM_FRAME_FIN;
- }
- if (p == NULL) {
- len = ngx_quic_varint_len(type);
- len += ngx_quic_varint_len(sf->stream_id);
- if (sf->off) {
- len += ngx_quic_varint_len(sf->offset);
- }
- if (sf->len) {
- len += ngx_quic_varint_len(sf->length);
- }
- len += sf->length;
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, type);
- ngx_quic_build_int(&p, sf->stream_id);
- if (sf->off) {
- ngx_quic_build_int(&p, sf->offset);
- }
- if (sf->len) {
- ngx_quic_build_int(&p, sf->length);
- }
- while (data) {
- b = data->buf;
- p = ngx_cpymem(p, b->pos, b->last - b->pos);
- data = data->next;
- }
- return p - start;
- }
- static size_t
- ngx_quic_create_max_streams(u_char *p, ngx_quic_max_streams_frame_t *ms)
- {
- size_t len;
- u_char *start;
- ngx_uint_t type;
- type = ms->bidi ? NGX_QUIC_FT_MAX_STREAMS : NGX_QUIC_FT_MAX_STREAMS2;
- if (p == NULL) {
- len = ngx_quic_varint_len(type);
- len += ngx_quic_varint_len(ms->limit);
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, type);
- ngx_quic_build_int(&p, ms->limit);
- return p - start;
- }
- static ngx_int_t
- ngx_quic_parse_transport_param(u_char *p, u_char *end, uint16_t id,
- ngx_quic_tp_t *dst)
- {
- uint64_t varint;
- ngx_str_t str;
- varint = 0;
- ngx_str_null(&str);
- switch (id) {
- case NGX_QUIC_TP_DISABLE_ACTIVE_MIGRATION:
-
- if (end - p != 0) {
- return NGX_ERROR;
- }
- dst->disable_active_migration = 1;
- return NGX_OK;
- case NGX_QUIC_TP_MAX_IDLE_TIMEOUT:
- case NGX_QUIC_TP_MAX_UDP_PAYLOAD_SIZE:
- case NGX_QUIC_TP_INITIAL_MAX_DATA:
- case NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL:
- case NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE:
- case NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI:
- case NGX_QUIC_TP_INITIAL_MAX_STREAMS_BIDI:
- case NGX_QUIC_TP_INITIAL_MAX_STREAMS_UNI:
- case NGX_QUIC_TP_ACK_DELAY_EXPONENT:
- case NGX_QUIC_TP_MAX_ACK_DELAY:
- case NGX_QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT:
- p = ngx_quic_parse_int(p, end, &varint);
- if (p == NULL) {
- return NGX_ERROR;
- }
- break;
- case NGX_QUIC_TP_INITIAL_SCID:
- str.len = end - p;
- str.data = p;
- break;
- default:
- return NGX_DECLINED;
- }
- switch (id) {
- case NGX_QUIC_TP_MAX_IDLE_TIMEOUT:
- dst->max_idle_timeout = varint;
- break;
- case NGX_QUIC_TP_MAX_UDP_PAYLOAD_SIZE:
- dst->max_udp_payload_size = varint;
- break;
- case NGX_QUIC_TP_INITIAL_MAX_DATA:
- dst->initial_max_data = varint;
- break;
- case NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL:
- dst->initial_max_stream_data_bidi_local = varint;
- break;
- case NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE:
- dst->initial_max_stream_data_bidi_remote = varint;
- break;
- case NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI:
- dst->initial_max_stream_data_uni = varint;
- break;
- case NGX_QUIC_TP_INITIAL_MAX_STREAMS_BIDI:
- dst->initial_max_streams_bidi = varint;
- break;
- case NGX_QUIC_TP_INITIAL_MAX_STREAMS_UNI:
- dst->initial_max_streams_uni = varint;
- break;
- case NGX_QUIC_TP_ACK_DELAY_EXPONENT:
- dst->ack_delay_exponent = varint;
- break;
- case NGX_QUIC_TP_MAX_ACK_DELAY:
- dst->max_ack_delay = varint;
- break;
- case NGX_QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT:
- dst->active_connection_id_limit = varint;
- break;
- case NGX_QUIC_TP_INITIAL_SCID:
- dst->initial_scid = str;
- break;
- default:
- return NGX_ERROR;
- }
- return NGX_OK;
- }
- ngx_int_t
- ngx_quic_parse_transport_params(u_char *p, u_char *end, ngx_quic_tp_t *tp,
- ngx_log_t *log)
- {
- uint64_t id, len;
- ngx_int_t rc;
- while (p < end) {
- p = ngx_quic_parse_int(p, end, &id);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, log, 0,
- "quic failed to parse transport param id");
- return NGX_ERROR;
- }
- switch (id) {
- case NGX_QUIC_TP_ORIGINAL_DCID:
- case NGX_QUIC_TP_PREFERRED_ADDRESS:
- case NGX_QUIC_TP_RETRY_SCID:
- case NGX_QUIC_TP_SR_TOKEN:
- ngx_log_error(NGX_LOG_INFO, log, 0,
- "quic client sent forbidden transport param"
- " id:0x%xL", id);
- return NGX_ERROR;
- }
- p = ngx_quic_parse_int(p, end, &len);
- if (p == NULL) {
- ngx_log_error(NGX_LOG_INFO, log, 0,
- "quic failed to parse"
- " transport param id:0x%xL length", id);
- return NGX_ERROR;
- }
- if ((size_t) (end - p) < len) {
- ngx_log_error(NGX_LOG_INFO, log, 0,
- "quic failed to parse"
- " transport param id:0x%xL, data length %uL too long",
- id, len);
- return NGX_ERROR;
- }
- rc = ngx_quic_parse_transport_param(p, p + len, id, tp);
- if (rc == NGX_ERROR) {
- ngx_log_error(NGX_LOG_INFO, log, 0,
- "quic failed to parse"
- " transport param id:0x%xL data", id);
- return NGX_ERROR;
- }
- if (rc == NGX_DECLINED) {
- ngx_log_error(NGX_LOG_INFO, log, 0,
- "quic %s transport param id:0x%xL, skipped",
- (id % 31 == 27) ? "reserved" : "unknown", id);
- }
- p += len;
- }
- if (p != end) {
- ngx_log_error(NGX_LOG_INFO, log, 0,
- "quic trailing garbage in"
- " transport parameters: bytes:%ui",
- end - p);
- return NGX_ERROR;
- }
- ngx_log_debug0(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic transport parameters parsed ok");
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic tp disable active migration: %ui",
- tp->disable_active_migration);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0, "quic tp idle_timeout:%ui",
- tp->max_idle_timeout);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic tp max_udp_payload_size:%ui",
- tp->max_udp_payload_size);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0, "quic tp max_data:%ui",
- tp->initial_max_data);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic tp max_stream_data_bidi_local:%ui",
- tp->initial_max_stream_data_bidi_local);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic tp max_stream_data_bidi_remote:%ui",
- tp->initial_max_stream_data_bidi_remote);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic tp max_stream_data_uni:%ui",
- tp->initial_max_stream_data_uni);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic tp initial_max_streams_bidi:%ui",
- tp->initial_max_streams_bidi);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic tp initial_max_streams_uni:%ui",
- tp->initial_max_streams_uni);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic tp ack_delay_exponent:%ui",
- tp->ack_delay_exponent);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0, "quic tp max_ack_delay:%ui",
- tp->max_ack_delay);
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic tp active_connection_id_limit:%ui",
- tp->active_connection_id_limit);
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, log, 0,
- "quic tp initial source_connection_id len:%uz %xV",
- tp->initial_scid.len, &tp->initial_scid);
- return NGX_OK;
- }
- static size_t
- ngx_quic_create_max_stream_data(u_char *p, ngx_quic_max_stream_data_frame_t *ms)
- {
- size_t len;
- u_char *start;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_MAX_STREAM_DATA);
- len += ngx_quic_varint_len(ms->id);
- len += ngx_quic_varint_len(ms->limit);
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_MAX_STREAM_DATA);
- ngx_quic_build_int(&p, ms->id);
- ngx_quic_build_int(&p, ms->limit);
- return p - start;
- }
- static size_t
- ngx_quic_create_max_data(u_char *p, ngx_quic_max_data_frame_t *md)
- {
- size_t len;
- u_char *start;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_MAX_DATA);
- len += ngx_quic_varint_len(md->max_data);
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_MAX_DATA);
- ngx_quic_build_int(&p, md->max_data);
- return p - start;
- }
- static size_t
- ngx_quic_create_path_challenge(u_char *p, ngx_quic_path_challenge_frame_t *pc)
- {
- size_t len;
- u_char *start;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_PATH_CHALLENGE);
- len += sizeof(pc->data);
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_PATH_CHALLENGE);
- p = ngx_cpymem(p, &pc->data, sizeof(pc->data));
- return p - start;
- }
- static size_t
- ngx_quic_create_path_response(u_char *p, ngx_quic_path_challenge_frame_t *pc)
- {
- size_t len;
- u_char *start;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_PATH_RESPONSE);
- len += sizeof(pc->data);
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_PATH_RESPONSE);
- p = ngx_cpymem(p, &pc->data, sizeof(pc->data));
- return p - start;
- }
- static size_t
- ngx_quic_create_new_connection_id(u_char *p, ngx_quic_new_conn_id_frame_t *ncid)
- {
- size_t len;
- u_char *start;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_NEW_CONNECTION_ID);
- len += ngx_quic_varint_len(ncid->seqnum);
- len += ngx_quic_varint_len(ncid->retire);
- len++;
- len += ncid->len;
- len += NGX_QUIC_SR_TOKEN_LEN;
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_NEW_CONNECTION_ID);
- ngx_quic_build_int(&p, ncid->seqnum);
- ngx_quic_build_int(&p, ncid->retire);
- *p++ = ncid->len;
- p = ngx_cpymem(p, ncid->cid, ncid->len);
- p = ngx_cpymem(p, ncid->srt, NGX_QUIC_SR_TOKEN_LEN);
- return p - start;
- }
- static size_t
- ngx_quic_create_retire_connection_id(u_char *p,
- ngx_quic_retire_cid_frame_t *rcid)
- {
- size_t len;
- u_char *start;
- if (p == NULL) {
- len = ngx_quic_varint_len(NGX_QUIC_FT_RETIRE_CONNECTION_ID);
- len += ngx_quic_varint_len(rcid->sequence_number);
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, NGX_QUIC_FT_RETIRE_CONNECTION_ID);
- ngx_quic_build_int(&p, rcid->sequence_number);
- return p - start;
- }
- ngx_int_t
- ngx_quic_init_transport_params(ngx_quic_tp_t *tp, ngx_quic_conf_t *qcf)
- {
- ngx_uint_t nstreams;
- ngx_memzero(tp, sizeof(ngx_quic_tp_t));
-
- tp->max_idle_timeout = qcf->idle_timeout;
- tp->max_udp_payload_size = NGX_QUIC_MAX_UDP_PAYLOAD_SIZE;
- nstreams = qcf->max_concurrent_streams_bidi
- + qcf->max_concurrent_streams_uni;
- tp->initial_max_data = nstreams * qcf->stream_buffer_size;
- tp->initial_max_stream_data_bidi_local = qcf->stream_buffer_size;
- tp->initial_max_stream_data_bidi_remote = qcf->stream_buffer_size;
- tp->initial_max_stream_data_uni = qcf->stream_buffer_size;
- tp->initial_max_streams_bidi = qcf->max_concurrent_streams_bidi;
- tp->initial_max_streams_uni = qcf->max_concurrent_streams_uni;
- tp->max_ack_delay = NGX_QUIC_DEFAULT_MAX_ACK_DELAY;
- tp->ack_delay_exponent = NGX_QUIC_DEFAULT_ACK_DELAY_EXPONENT;
- tp->active_connection_id_limit = qcf->active_connection_id_limit;
- tp->disable_active_migration = qcf->disable_active_migration;
- return NGX_OK;
- }
- ssize_t
- ngx_quic_create_transport_params(u_char *pos, u_char *end, ngx_quic_tp_t *tp,
- size_t *clen)
- {
- u_char *p;
- size_t len;
- #define ngx_quic_tp_len(id, value) \
- ngx_quic_varint_len(id) \
- + ngx_quic_varint_len(value) \
- + ngx_quic_varint_len(ngx_quic_varint_len(value))
- #define ngx_quic_tp_vint(id, value) \
- do { \
- ngx_quic_build_int(&p, id); \
- ngx_quic_build_int(&p, ngx_quic_varint_len(value)); \
- ngx_quic_build_int(&p, value); \
- } while (0)
- #define ngx_quic_tp_strlen(id, value) \
- ngx_quic_varint_len(id) \
- + ngx_quic_varint_len(value.len) \
- + value.len
- #define ngx_quic_tp_str(id, value) \
- do { \
- ngx_quic_build_int(&p, id); \
- ngx_quic_build_int(&p, value.len); \
- p = ngx_cpymem(p, value.data, value.len); \
- } while (0)
- len = ngx_quic_tp_len(NGX_QUIC_TP_INITIAL_MAX_DATA, tp->initial_max_data);
- len += ngx_quic_tp_len(NGX_QUIC_TP_INITIAL_MAX_STREAMS_UNI,
- tp->initial_max_streams_uni);
- len += ngx_quic_tp_len(NGX_QUIC_TP_INITIAL_MAX_STREAMS_BIDI,
- tp->initial_max_streams_bidi);
- len += ngx_quic_tp_len(NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL,
- tp->initial_max_stream_data_bidi_local);
- len += ngx_quic_tp_len(NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE,
- tp->initial_max_stream_data_bidi_remote);
- len += ngx_quic_tp_len(NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI,
- tp->initial_max_stream_data_uni);
- len += ngx_quic_tp_len(NGX_QUIC_TP_MAX_IDLE_TIMEOUT,
- tp->max_idle_timeout);
- len += ngx_quic_tp_len(NGX_QUIC_TP_MAX_UDP_PAYLOAD_SIZE,
- tp->max_udp_payload_size);
- if (tp->disable_active_migration) {
- len += ngx_quic_varint_len(NGX_QUIC_TP_DISABLE_ACTIVE_MIGRATION);
- len += ngx_quic_varint_len(0);
- }
- len += ngx_quic_tp_len(NGX_QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT,
- tp->active_connection_id_limit);
-
- if (clen) {
- *clen = len;
- }
- len += ngx_quic_tp_len(NGX_QUIC_TP_MAX_ACK_DELAY,
- tp->max_ack_delay);
- len += ngx_quic_tp_len(NGX_QUIC_TP_ACK_DELAY_EXPONENT,
- tp->ack_delay_exponent);
- len += ngx_quic_tp_strlen(NGX_QUIC_TP_ORIGINAL_DCID, tp->original_dcid);
- len += ngx_quic_tp_strlen(NGX_QUIC_TP_INITIAL_SCID, tp->initial_scid);
- if (tp->retry_scid.len) {
- len += ngx_quic_tp_strlen(NGX_QUIC_TP_RETRY_SCID, tp->retry_scid);
- }
- len += ngx_quic_varint_len(NGX_QUIC_TP_SR_TOKEN);
- len += ngx_quic_varint_len(NGX_QUIC_SR_TOKEN_LEN);
- len += NGX_QUIC_SR_TOKEN_LEN;
- if (pos == NULL) {
- return len;
- }
- p = pos;
- ngx_quic_tp_vint(NGX_QUIC_TP_INITIAL_MAX_DATA,
- tp->initial_max_data);
- ngx_quic_tp_vint(NGX_QUIC_TP_INITIAL_MAX_STREAMS_UNI,
- tp->initial_max_streams_uni);
- ngx_quic_tp_vint(NGX_QUIC_TP_INITIAL_MAX_STREAMS_BIDI,
- tp->initial_max_streams_bidi);
- ngx_quic_tp_vint(NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL,
- tp->initial_max_stream_data_bidi_local);
- ngx_quic_tp_vint(NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE,
- tp->initial_max_stream_data_bidi_remote);
- ngx_quic_tp_vint(NGX_QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI,
- tp->initial_max_stream_data_uni);
- ngx_quic_tp_vint(NGX_QUIC_TP_MAX_IDLE_TIMEOUT,
- tp->max_idle_timeout);
- ngx_quic_tp_vint(NGX_QUIC_TP_MAX_UDP_PAYLOAD_SIZE,
- tp->max_udp_payload_size);
- if (tp->disable_active_migration) {
- ngx_quic_build_int(&p, NGX_QUIC_TP_DISABLE_ACTIVE_MIGRATION);
- ngx_quic_build_int(&p, 0);
- }
- ngx_quic_tp_vint(NGX_QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT,
- tp->active_connection_id_limit);
- ngx_quic_tp_vint(NGX_QUIC_TP_MAX_ACK_DELAY,
- tp->max_ack_delay);
- ngx_quic_tp_vint(NGX_QUIC_TP_ACK_DELAY_EXPONENT,
- tp->ack_delay_exponent);
- ngx_quic_tp_str(NGX_QUIC_TP_ORIGINAL_DCID, tp->original_dcid);
- ngx_quic_tp_str(NGX_QUIC_TP_INITIAL_SCID, tp->initial_scid);
- if (tp->retry_scid.len) {
- ngx_quic_tp_str(NGX_QUIC_TP_RETRY_SCID, tp->retry_scid);
- }
- ngx_quic_build_int(&p, NGX_QUIC_TP_SR_TOKEN);
- ngx_quic_build_int(&p, NGX_QUIC_SR_TOKEN_LEN);
- p = ngx_cpymem(p, tp->sr_token, NGX_QUIC_SR_TOKEN_LEN);
- return p - pos;
- }
- static size_t
- ngx_quic_create_close(u_char *p, ngx_quic_frame_t *f)
- {
- size_t len;
- u_char *start;
- ngx_quic_close_frame_t *cl;
- cl = &f->u.close;
- if (p == NULL) {
- len = ngx_quic_varint_len(f->type);
- len += ngx_quic_varint_len(cl->error_code);
- if (f->type != NGX_QUIC_FT_CONNECTION_CLOSE_APP) {
- len += ngx_quic_varint_len(cl->frame_type);
- }
- len += ngx_quic_varint_len(cl->reason.len);
- len += cl->reason.len;
- return len;
- }
- start = p;
- ngx_quic_build_int(&p, f->type);
- ngx_quic_build_int(&p, cl->error_code);
- if (f->type != NGX_QUIC_FT_CONNECTION_CLOSE_APP) {
- ngx_quic_build_int(&p, cl->frame_type);
- }
- ngx_quic_build_int(&p, cl->reason.len);
- p = ngx_cpymem(p, cl->reason.data, cl->reason.len);
- return p - start;
- }
- void
- ngx_quic_dcid_encode_key(u_char *dcid, uint64_t key)
- {
- (void) ngx_quic_write_uint64(dcid, key);
- }
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