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src/http/v3/ngx_http_v3_parse.c - nginx source code
Data types defined
Functions defined
Macros defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_http.h>
- #define ngx_http_v3_is_v2_frame(type) \
- ((type) == 0x02 || (type) == 0x06 || (type) == 0x08 || (type) == 0x09)
- static void ngx_http_v3_parse_start_local(ngx_buf_t *b, ngx_buf_t *loc,
- ngx_uint_t n);
- static void ngx_http_v3_parse_end_local(ngx_buf_t *b, ngx_buf_t *loc,
- ngx_uint_t *n);
- static ngx_int_t ngx_http_v3_parse_skip(ngx_buf_t *b, ngx_uint_t *length);
- static ngx_int_t ngx_http_v3_parse_varlen_int(ngx_connection_t *c,
- ngx_http_v3_parse_varlen_int_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_prefix_int(ngx_connection_t *c,
- ngx_http_v3_parse_prefix_int_t *st, ngx_uint_t prefix, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_field_section_prefix(ngx_connection_t *c,
- ngx_http_v3_parse_field_section_prefix_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_field_rep(ngx_connection_t *c,
- ngx_http_v3_parse_field_rep_t *st, ngx_uint_t base, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_literal(ngx_connection_t *c,
- ngx_http_v3_parse_literal_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_field_ri(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_field_lri(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_field_l(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_field_pbi(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_field_lpbi(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_control(ngx_connection_t *c,
- ngx_http_v3_parse_control_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_settings(ngx_connection_t *c,
- ngx_http_v3_parse_settings_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_encoder(ngx_connection_t *c,
- ngx_http_v3_parse_encoder_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_field_inr(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_field_iln(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_decoder(ngx_connection_t *c,
- ngx_http_v3_parse_decoder_t *st, ngx_buf_t *b);
- static ngx_int_t ngx_http_v3_parse_lookup(ngx_connection_t *c,
- ngx_uint_t dynamic, ngx_uint_t index, ngx_str_t *name, ngx_str_t *value);
- static void
- ngx_http_v3_parse_start_local(ngx_buf_t *b, ngx_buf_t *loc, ngx_uint_t n)
- {
- *loc = *b;
- if ((size_t) (loc->last - loc->pos) > n) {
- loc->last = loc->pos + n;
- }
- }
- static void
- ngx_http_v3_parse_end_local(ngx_buf_t *b, ngx_buf_t *loc, ngx_uint_t *pn)
- {
- *pn -= loc->pos - b->pos;
- b->pos = loc->pos;
- }
- static ngx_int_t
- ngx_http_v3_parse_skip(ngx_buf_t *b, ngx_uint_t *length)
- {
- if ((size_t) (b->last - b->pos) < *length) {
- *length -= b->last - b->pos;
- b->pos = b->last;
- return NGX_AGAIN;
- }
- b->pos += *length;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_varlen_int(ngx_connection_t *c,
- ngx_http_v3_parse_varlen_int_t *st, ngx_buf_t *b)
- {
- u_char ch;
- enum {
- sw_start = 0,
- sw_length_2,
- sw_length_3,
- sw_length_4,
- sw_length_5,
- sw_length_6,
- sw_length_7,
- sw_length_8
- };
- for ( ;; ) {
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos++;
- switch (st->state) {
- case sw_start:
- st->value = ch;
- if (st->value & 0xc0) {
- st->state = sw_length_2;
- break;
- }
- goto done;
- case sw_length_2:
- st->value = (st->value << 8) + ch;
- if ((st->value & 0xc000) == 0x4000) {
- st->value &= 0x3fff;
- goto done;
- }
- st->state = sw_length_3;
- break;
- case sw_length_4:
- st->value = (st->value << 8) + ch;
- if ((st->value & 0xc0000000) == 0x80000000) {
- st->value &= 0x3fffffff;
- goto done;
- }
- st->state = sw_length_5;
- break;
- case sw_length_3:
- case sw_length_5:
- case sw_length_6:
- case sw_length_7:
- st->value = (st->value << 8) + ch;
- st->state++;
- break;
- case sw_length_8:
- st->value = (st->value << 8) + ch;
- st->value &= 0x3fffffffffffffff;
- goto done;
- }
- }
- done:
- ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse varlen int %uL", st->value);
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_prefix_int(ngx_connection_t *c,
- ngx_http_v3_parse_prefix_int_t *st, ngx_uint_t prefix, ngx_buf_t *b)
- {
- u_char ch;
- ngx_uint_t mask;
- enum {
- sw_start = 0,
- sw_value
- };
- for ( ;; ) {
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos++;
- switch (st->state) {
- case sw_start:
- mask = (1 << prefix) - 1;
- st->value = ch & mask;
- if (st->value != mask) {
- goto done;
- }
- st->shift = 0;
- st->state = sw_value;
- break;
- case sw_value:
- st->value += (uint64_t) (ch & 0x7f) << st->shift;
- if (st->shift == 56
- && ((ch & 0x80) || (st->value & 0xc000000000000000)))
- {
- ngx_log_error(NGX_LOG_INFO, c->log, 0,
- "client exceeded integer size limit");
- return NGX_HTTP_V3_ERR_EXCESSIVE_LOAD;
- }
- if (ch & 0x80) {
- st->shift += 7;
- break;
- }
- goto done;
- }
- }
- done:
- ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse prefix int %uL", st->value);
- st->state = sw_start;
- return NGX_DONE;
- }
- ngx_int_t
- ngx_http_v3_parse_headers(ngx_connection_t *c, ngx_http_v3_parse_headers_t *st,
- ngx_buf_t *b)
- {
- ngx_buf_t loc;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_type,
- sw_length,
- sw_skip,
- sw_prefix,
- sw_verify,
- sw_field_rep,
- sw_done
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse headers");
- st->state = sw_type;
-
- case sw_type:
- rc = ngx_http_v3_parse_varlen_int(c, &st->vlint, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->type = st->vlint.value;
- if (ngx_http_v3_is_v2_frame(st->type)
- || st->type == NGX_HTTP_V3_FRAME_DATA
- || st->type == NGX_HTTP_V3_FRAME_GOAWAY
- || st->type == NGX_HTTP_V3_FRAME_SETTINGS
- || st->type == NGX_HTTP_V3_FRAME_MAX_PUSH_ID
- || st->type == NGX_HTTP_V3_FRAME_CANCEL_PUSH
- || st->type == NGX_HTTP_V3_FRAME_PUSH_PROMISE)
- {
- return NGX_HTTP_V3_ERR_FRAME_UNEXPECTED;
- }
- st->state = sw_length;
- break;
- case sw_length:
- rc = ngx_http_v3_parse_varlen_int(c, &st->vlint, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->length = st->vlint.value;
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse headers type:%ui, len:%ui",
- st->type, st->length);
- if (st->type != NGX_HTTP_V3_FRAME_HEADERS) {
- st->state = st->length > 0 ? sw_skip : sw_type;
- break;
- }
- if (st->length == 0) {
- return NGX_HTTP_V3_ERR_FRAME_ERROR;
- }
- st->state = sw_prefix;
- break;
- case sw_skip:
- rc = ngx_http_v3_parse_skip(b, &st->length);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->state = sw_type;
- break;
- case sw_prefix:
- ngx_http_v3_parse_start_local(b, &loc, st->length);
- rc = ngx_http_v3_parse_field_section_prefix(c, &st->prefix, &loc);
- ngx_http_v3_parse_end_local(b, &loc, &st->length);
- if (st->length == 0 && rc == NGX_AGAIN) {
- return NGX_HTTP_V3_ERR_FRAME_ERROR;
- }
- if (rc != NGX_DONE) {
- return rc;
- }
- st->state = sw_verify;
- break;
- case sw_verify:
- rc = ngx_http_v3_check_insert_count(c, st->prefix.insert_count);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_field_rep;
-
- case sw_field_rep:
- ngx_http_v3_parse_start_local(b, &loc, st->length);
- rc = ngx_http_v3_parse_field_rep(c, &st->field_rep, st->prefix.base,
- &loc);
- ngx_http_v3_parse_end_local(b, &loc, &st->length);
- if (st->length == 0 && rc == NGX_AGAIN) {
- return NGX_HTTP_V3_ERR_FRAME_ERROR;
- }
- if (rc != NGX_DONE) {
- return rc;
- }
- if (st->length == 0) {
- goto done;
- }
- return NGX_OK;
- }
- }
- done:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 parse headers done");
- if (st->prefix.insert_count > 0) {
- if (ngx_http_v3_send_ack_section(c, c->quic->id) != NGX_OK) {
- return NGX_ERROR;
- }
- ngx_http_v3_ack_insert_count(c, st->prefix.insert_count);
- }
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_field_section_prefix(ngx_connection_t *c,
- ngx_http_v3_parse_field_section_prefix_t *st, ngx_buf_t *b)
- {
- u_char ch;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_req_insert_count,
- sw_delta_base,
- sw_read_delta_base
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field section prefix");
- st->state = sw_req_insert_count;
-
- case sw_req_insert_count:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 8, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->insert_count = st->pint.value;
- st->state = sw_delta_base;
- break;
- case sw_delta_base:
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->sign = (ch & 0x80) ? 1 : 0;
- st->state = sw_read_delta_base;
-
- case sw_read_delta_base:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 7, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->delta_base = st->pint.value;
- goto done;
- }
- }
- done:
- rc = ngx_http_v3_decode_insert_count(c, &st->insert_count);
- if (rc != NGX_OK) {
- return rc;
- }
- if (st->sign) {
- if (st->insert_count <= st->delta_base) {
- ngx_log_error(NGX_LOG_INFO, c->log, 0, "client sent negative base");
- return NGX_HTTP_V3_ERR_DECOMPRESSION_FAILED;
- }
- st->base = st->insert_count - st->delta_base - 1;
- } else {
- st->base = st->insert_count + st->delta_base;
- }
- ngx_log_debug4(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field section prefix done "
- "insert_count:%ui, sign:%ui, delta_base:%ui, base:%ui",
- st->insert_count, st->sign, st->delta_base, st->base);
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_field_rep(ngx_connection_t *c,
- ngx_http_v3_parse_field_rep_t *st, ngx_uint_t base, ngx_buf_t *b)
- {
- u_char ch;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_field_ri,
- sw_field_lri,
- sw_field_l,
- sw_field_pbi,
- sw_field_lpbi
- };
- if (st->state == sw_start) {
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field representation");
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- ngx_memzero(&st->field, sizeof(ngx_http_v3_parse_field_t));
- st->field.base = base;
- if (ch & 0x80) {
-
- st->state = sw_field_ri;
- } else if (ch & 0x40) {
-
- st->state = sw_field_lri;
- } else if (ch & 0x20) {
-
- st->state = sw_field_l;
- } else if (ch & 0x10) {
-
- st->state = sw_field_pbi;
- } else {
-
- st->state = sw_field_lpbi;
- }
- }
- switch (st->state) {
- case sw_field_ri:
- rc = ngx_http_v3_parse_field_ri(c, &st->field, b);
- break;
- case sw_field_lri:
- rc = ngx_http_v3_parse_field_lri(c, &st->field, b);
- break;
- case sw_field_l:
- rc = ngx_http_v3_parse_field_l(c, &st->field, b);
- break;
- case sw_field_pbi:
- rc = ngx_http_v3_parse_field_pbi(c, &st->field, b);
- break;
- case sw_field_lpbi:
- rc = ngx_http_v3_parse_field_lpbi(c, &st->field, b);
- break;
- default:
- rc = NGX_OK;
- }
- if (rc != NGX_DONE) {
- return rc;
- }
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field representation done");
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_literal(ngx_connection_t *c, ngx_http_v3_parse_literal_t *st,
- ngx_buf_t *b)
- {
- u_char ch;
- ngx_uint_t n;
- ngx_http_core_srv_conf_t *cscf;
- enum {
- sw_start = 0,
- sw_value
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse literal huff:%ui, len:%ui",
- st->huffman, st->length);
- n = st->length;
- cscf = ngx_http_v3_get_module_srv_conf(c, ngx_http_core_module);
- if (n > cscf->large_client_header_buffers.size) {
- ngx_log_error(NGX_LOG_INFO, c->log, 0,
- "client sent too large field line");
- return NGX_HTTP_V3_ERR_EXCESSIVE_LOAD;
- }
- if (st->huffman) {
- n = n * 8 / 5;
- st->huffstate = 0;
- }
- st->last = ngx_pnalloc(c->pool, n + 1);
- if (st->last == NULL) {
- return NGX_ERROR;
- }
- st->value.data = st->last;
- st->state = sw_value;
-
- case sw_value:
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos++;
- if (st->huffman) {
- if (ngx_http_huff_decode(&st->huffstate, &ch, 1, &st->last,
- st->length == 1, c->log)
- != NGX_OK)
- {
- ngx_log_error(NGX_LOG_INFO, c->log, 0,
- "client sent invalid encoded field line");
- return NGX_ERROR;
- }
- } else {
- *st->last++ = ch;
- }
- if (--st->length) {
- break;
- }
- st->value.len = st->last - st->value.data;
- *st->last = '\0';
- goto done;
- }
- }
- done:
- ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse literal done \"%V\"", &st->value);
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_field_ri(ngx_connection_t *c, ngx_http_v3_parse_field_t *st,
- ngx_buf_t *b)
- {
- u_char ch;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_index
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field ri");
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->dynamic = (ch & 0x40) ? 0 : 1;
- st->state = sw_index;
-
- case sw_index:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 6, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->index = st->pint.value;
- goto done;
- }
- }
- done:
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field ri done %s%ui]",
- st->dynamic ? "dynamic[-" : "static[", st->index);
- if (st->dynamic) {
- st->index = st->base - st->index - 1;
- }
- rc = ngx_http_v3_parse_lookup(c, st->dynamic, st->index, &st->name,
- &st->value);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_field_lri(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b)
- {
- u_char ch;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_index,
- sw_value_len,
- sw_read_value_len,
- sw_value
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field lri");
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->dynamic = (ch & 0x10) ? 0 : 1;
- st->state = sw_index;
-
- case sw_index:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 4, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->index = st->pint.value;
- st->state = sw_value_len;
- break;
- case sw_value_len:
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->literal.huffman = (ch & 0x80) ? 1 : 0;
- st->state = sw_read_value_len;
-
- case sw_read_value_len:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 7, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->literal.length = st->pint.value;
- if (st->literal.length == 0) {
- st->value.data = (u_char *) "";
- goto done;
- }
- st->state = sw_value;
- break;
- case sw_value:
- rc = ngx_http_v3_parse_literal(c, &st->literal, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->value = st->literal.value;
- goto done;
- }
- }
- done:
- ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field lri done %s%ui] \"%V\"",
- st->dynamic ? "dynamic[-" : "static[",
- st->index, &st->value);
- if (st->dynamic) {
- st->index = st->base - st->index - 1;
- }
- rc = ngx_http_v3_parse_lookup(c, st->dynamic, st->index, &st->name, NULL);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_field_l(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b)
- {
- u_char ch;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_name_len,
- sw_name,
- sw_value_len,
- sw_read_value_len,
- sw_value
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field l");
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->literal.huffman = (ch & 0x08) ? 1 : 0;
- st->state = sw_name_len;
-
- case sw_name_len:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 3, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->literal.length = st->pint.value;
- if (st->literal.length == 0) {
- return NGX_ERROR;
- }
- st->state = sw_name;
- break;
- case sw_name:
- rc = ngx_http_v3_parse_literal(c, &st->literal, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->name = st->literal.value;
- st->state = sw_value_len;
- break;
- case sw_value_len:
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->literal.huffman = (ch & 0x80) ? 1 : 0;
- st->state = sw_read_value_len;
-
- case sw_read_value_len:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 7, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->literal.length = st->pint.value;
- if (st->literal.length == 0) {
- st->value.data = (u_char *) "";
- goto done;
- }
- st->state = sw_value;
- break;
- case sw_value:
- rc = ngx_http_v3_parse_literal(c, &st->literal, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->value = st->literal.value;
- goto done;
- }
- }
- done:
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field l done \"%V\" \"%V\"",
- &st->name, &st->value);
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_field_pbi(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b)
- {
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_index
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field pbi");
- st->state = sw_index;
-
- case sw_index:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 4, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->index = st->pint.value;
- goto done;
- }
- }
- done:
- ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field pbi done dynamic[+%ui]", st->index);
- rc = ngx_http_v3_parse_lookup(c, 1, st->base + st->index, &st->name,
- &st->value);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_field_lpbi(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b)
- {
- u_char ch;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_index,
- sw_value_len,
- sw_read_value_len,
- sw_value
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field lpbi");
- st->state = sw_index;
-
- case sw_index:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 3, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->index = st->pint.value;
- st->state = sw_value_len;
- break;
- case sw_value_len:
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->literal.huffman = (ch & 0x80) ? 1 : 0;
- st->state = sw_read_value_len;
-
- case sw_read_value_len:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 7, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->literal.length = st->pint.value;
- if (st->literal.length == 0) {
- st->value.data = (u_char *) "";
- goto done;
- }
- st->state = sw_value;
- break;
- case sw_value:
- rc = ngx_http_v3_parse_literal(c, &st->literal, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->value = st->literal.value;
- goto done;
- }
- }
- done:
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field lpbi done dynamic[+%ui] \"%V\"",
- st->index, &st->value);
- rc = ngx_http_v3_parse_lookup(c, 1, st->base + st->index, &st->name, NULL);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_lookup(ngx_connection_t *c, ngx_uint_t dynamic,
- ngx_uint_t index, ngx_str_t *name, ngx_str_t *value)
- {
- u_char *p;
- if (!dynamic) {
- if (ngx_http_v3_lookup_static(c, index, name, value) != NGX_OK) {
- return NGX_HTTP_V3_ERR_DECOMPRESSION_FAILED;
- }
- return NGX_OK;
- }
- if (ngx_http_v3_lookup(c, index, name, value) != NGX_OK) {
- return NGX_HTTP_V3_ERR_DECOMPRESSION_FAILED;
- }
- if (name) {
- p = ngx_pnalloc(c->pool, name->len + 1);
- if (p == NULL) {
- return NGX_ERROR;
- }
- ngx_memcpy(p, name->data, name->len);
- p[name->len] = '\0';
- name->data = p;
- }
- if (value) {
- p = ngx_pnalloc(c->pool, value->len + 1);
- if (p == NULL) {
- return NGX_ERROR;
- }
- ngx_memcpy(p, value->data, value->len);
- p[value->len] = '\0';
- value->data = p;
- }
- return NGX_OK;
- }
- static ngx_int_t
- ngx_http_v3_parse_control(ngx_connection_t *c, ngx_http_v3_parse_control_t *st,
- ngx_buf_t *b)
- {
- ngx_buf_t loc;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_first_type,
- sw_type,
- sw_length,
- sw_settings,
- sw_skip
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse control");
- st->state = sw_first_type;
-
- case sw_first_type:
- case sw_type:
- rc = ngx_http_v3_parse_varlen_int(c, &st->vlint, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->type = st->vlint.value;
- ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse frame type:%ui", st->type);
- if (st->state == sw_first_type
- && st->type != NGX_HTTP_V3_FRAME_SETTINGS)
- {
- return NGX_HTTP_V3_ERR_MISSING_SETTINGS;
- }
- if (st->state != sw_first_type
- && st->type == NGX_HTTP_V3_FRAME_SETTINGS)
- {
- return NGX_HTTP_V3_ERR_FRAME_UNEXPECTED;
- }
- if (ngx_http_v3_is_v2_frame(st->type)
- || st->type == NGX_HTTP_V3_FRAME_DATA
- || st->type == NGX_HTTP_V3_FRAME_HEADERS
- || st->type == NGX_HTTP_V3_FRAME_PUSH_PROMISE)
- {
- return NGX_HTTP_V3_ERR_FRAME_UNEXPECTED;
- }
- if (st->type == NGX_HTTP_V3_FRAME_CANCEL_PUSH) {
- return NGX_HTTP_V3_ERR_ID_ERROR;
- }
- st->state = sw_length;
- break;
- case sw_length:
- rc = ngx_http_v3_parse_varlen_int(c, &st->vlint, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse frame len:%uL", st->vlint.value);
- st->length = st->vlint.value;
- if (st->length == 0) {
- st->state = sw_type;
- break;
- }
- switch (st->type) {
- case NGX_HTTP_V3_FRAME_SETTINGS:
- st->state = sw_settings;
- break;
- default:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse skip unknown frame");
- st->state = sw_skip;
- }
- break;
- case sw_settings:
- ngx_http_v3_parse_start_local(b, &loc, st->length);
- rc = ngx_http_v3_parse_settings(c, &st->settings, &loc);
- ngx_http_v3_parse_end_local(b, &loc, &st->length);
- if (st->length == 0 && rc == NGX_AGAIN) {
- return NGX_HTTP_V3_ERR_SETTINGS_ERROR;
- }
- if (rc != NGX_DONE) {
- return rc;
- }
- if (st->length == 0) {
- st->state = sw_type;
- }
- break;
- case sw_skip:
- rc = ngx_http_v3_parse_skip(b, &st->length);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->state = sw_type;
- break;
- }
- }
- }
- static ngx_int_t
- ngx_http_v3_parse_settings(ngx_connection_t *c,
- ngx_http_v3_parse_settings_t *st, ngx_buf_t *b)
- {
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_id,
- sw_value
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse settings");
- st->state = sw_id;
-
- case sw_id:
- rc = ngx_http_v3_parse_varlen_int(c, &st->vlint, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->id = st->vlint.value;
- st->state = sw_value;
- break;
- case sw_value:
- rc = ngx_http_v3_parse_varlen_int(c, &st->vlint, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- if (ngx_http_v3_set_param(c, st->id, st->vlint.value) != NGX_OK) {
- return NGX_HTTP_V3_ERR_SETTINGS_ERROR;
- }
- goto done;
- }
- }
- done:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 parse settings done");
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_encoder(ngx_connection_t *c, ngx_http_v3_parse_encoder_t *st,
- ngx_buf_t *b)
- {
- u_char ch;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_inr,
- sw_iln,
- sw_capacity,
- sw_duplicate
- };
- for ( ;; ) {
- if (st->state == sw_start) {
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse encoder instruction");
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- if (ch & 0x80) {
-
- st->state = sw_inr;
- } else if (ch & 0x40) {
-
- st->state = sw_iln;
- } else if (ch & 0x20) {
-
- st->state = sw_capacity;
- } else {
-
- st->state = sw_duplicate;
- }
- }
- switch (st->state) {
- case sw_inr:
- rc = ngx_http_v3_parse_field_inr(c, &st->field, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->state = sw_start;
- break;
- case sw_iln:
- rc = ngx_http_v3_parse_field_iln(c, &st->field, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->state = sw_start;
- break;
- case sw_capacity:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 5, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- rc = ngx_http_v3_set_capacity(c, st->pint.value);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- break;
- default:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 5, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- rc = ngx_http_v3_duplicate(c, st->pint.value);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- break;
- }
- }
- }
- static ngx_int_t
- ngx_http_v3_parse_field_inr(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b)
- {
- u_char ch;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_name_index,
- sw_value_len,
- sw_read_value_len,
- sw_value
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field inr");
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->dynamic = (ch & 0x40) ? 0 : 1;
- st->state = sw_name_index;
-
- case sw_name_index:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 6, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->index = st->pint.value;
- st->state = sw_value_len;
- break;
- case sw_value_len:
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->literal.huffman = (ch & 0x80) ? 1 : 0;
- st->state = sw_read_value_len;
-
- case sw_read_value_len:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 7, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->literal.length = st->pint.value;
- if (st->literal.length == 0) {
- st->value.len = 0;
- goto done;
- }
- st->state = sw_value;
- break;
- case sw_value:
- rc = ngx_http_v3_parse_literal(c, &st->literal, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->value = st->literal.value;
- goto done;
- }
- }
- done:
- ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field inr done %s[%ui] \"%V\"",
- st->dynamic ? "dynamic" : "static",
- st->index, &st->value);
- rc = ngx_http_v3_ref_insert(c, st->dynamic, st->index, &st->value);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_field_iln(ngx_connection_t *c,
- ngx_http_v3_parse_field_t *st, ngx_buf_t *b)
- {
- u_char ch;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_name_len,
- sw_name,
- sw_value_len,
- sw_read_value_len,
- sw_value
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field iln");
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->literal.huffman = (ch & 0x20) ? 1 : 0;
- st->state = sw_name_len;
-
- case sw_name_len:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 5, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->literal.length = st->pint.value;
- if (st->literal.length == 0) {
- return NGX_ERROR;
- }
- st->state = sw_name;
- break;
- case sw_name:
- rc = ngx_http_v3_parse_literal(c, &st->literal, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->name = st->literal.value;
- st->state = sw_value_len;
- break;
- case sw_value_len:
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- st->literal.huffman = (ch & 0x80) ? 1 : 0;
- st->state = sw_read_value_len;
-
- case sw_read_value_len:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 7, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->literal.length = st->pint.value;
- if (st->literal.length == 0) {
- st->value.len = 0;
- goto done;
- }
- st->state = sw_value;
- break;
- case sw_value:
- rc = ngx_http_v3_parse_literal(c, &st->literal, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->value = st->literal.value;
- goto done;
- }
- }
- done:
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse field iln done \"%V\":\"%V\"",
- &st->name, &st->value);
- rc = ngx_http_v3_insert(c, &st->name, &st->value);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- return NGX_DONE;
- }
- static ngx_int_t
- ngx_http_v3_parse_decoder(ngx_connection_t *c, ngx_http_v3_parse_decoder_t *st,
- ngx_buf_t *b)
- {
- u_char ch;
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_ack_section,
- sw_cancel_stream,
- sw_inc_insert_count
- };
- for ( ;; ) {
- if (st->state == sw_start) {
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse decoder instruction");
- if (b->pos == b->last) {
- return NGX_AGAIN;
- }
- ch = *b->pos;
- if (ch & 0x80) {
-
- st->state = sw_ack_section;
- } else if (ch & 0x40) {
-
- st->state = sw_cancel_stream;
- } else {
-
- st->state = sw_inc_insert_count;
- }
- }
- switch (st->state) {
- case sw_ack_section:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 7, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- rc = ngx_http_v3_ack_section(c, st->pint.value);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- break;
- case sw_cancel_stream:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 6, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- rc = ngx_http_v3_cancel_stream(c, st->pint.value);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- break;
- case sw_inc_insert_count:
- rc = ngx_http_v3_parse_prefix_int(c, &st->pint, 6, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- rc = ngx_http_v3_inc_insert_count(c, st->pint.value);
- if (rc != NGX_OK) {
- return rc;
- }
- st->state = sw_start;
- break;
- }
- }
- }
- ngx_int_t
- ngx_http_v3_parse_data(ngx_connection_t *c, ngx_http_v3_parse_data_t *st,
- ngx_buf_t *b)
- {
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_type,
- sw_length,
- sw_skip
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 parse data");
- st->state = sw_type;
-
- case sw_type:
- rc = ngx_http_v3_parse_varlen_int(c, &st->vlint, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->type = st->vlint.value;
- if (st->type == NGX_HTTP_V3_FRAME_HEADERS) {
-
- goto done;
- }
- if (ngx_http_v3_is_v2_frame(st->type)
- || st->type == NGX_HTTP_V3_FRAME_GOAWAY
- || st->type == NGX_HTTP_V3_FRAME_SETTINGS
- || st->type == NGX_HTTP_V3_FRAME_MAX_PUSH_ID
- || st->type == NGX_HTTP_V3_FRAME_CANCEL_PUSH
- || st->type == NGX_HTTP_V3_FRAME_PUSH_PROMISE)
- {
- return NGX_HTTP_V3_ERR_FRAME_UNEXPECTED;
- }
- st->state = sw_length;
- break;
- case sw_length:
- rc = ngx_http_v3_parse_varlen_int(c, &st->vlint, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->length = st->vlint.value;
- ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
- "http3 parse data type:%ui, len:%ui",
- st->type, st->length);
- if (st->type != NGX_HTTP_V3_FRAME_DATA && st->length > 0) {
- st->state = sw_skip;
- break;
- }
- st->state = sw_type;
- return NGX_OK;
- case sw_skip:
- rc = ngx_http_v3_parse_skip(b, &st->length);
- if (rc != NGX_DONE) {
- return rc;
- }
- st->state = sw_type;
- break;
- }
- }
- done:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 parse data done");
- st->state = sw_start;
- return NGX_DONE;
- }
- ngx_int_t
- ngx_http_v3_parse_uni(ngx_connection_t *c, ngx_http_v3_parse_uni_t *st,
- ngx_buf_t *b)
- {
- ngx_int_t rc;
- enum {
- sw_start = 0,
- sw_type,
- sw_control,
- sw_encoder,
- sw_decoder,
- sw_unknown
- };
- for ( ;; ) {
- switch (st->state) {
- case sw_start:
- ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 parse uni");
- st->state = sw_type;
-
- case sw_type:
- rc = ngx_http_v3_parse_varlen_int(c, &st->vlint, b);
- if (rc != NGX_DONE) {
- return rc;
- }
- rc = ngx_http_v3_register_uni_stream(c, st->vlint.value);
- if (rc != NGX_OK) {
- return rc;
- }
- switch (st->vlint.value) {
- case NGX_HTTP_V3_STREAM_CONTROL:
- st->state = sw_control;
- break;
- case NGX_HTTP_V3_STREAM_ENCODER:
- st->state = sw_encoder;
- break;
- case NGX_HTTP_V3_STREAM_DECODER:
- st->state = sw_decoder;
- break;
- default:
- st->state = sw_unknown;
- }
- break;
- case sw_control:
- return ngx_http_v3_parse_control(c, &st->u.control, b);
- case sw_encoder:
- return ngx_http_v3_parse_encoder(c, &st->u.encoder, b);
- case sw_decoder:
- return ngx_http_v3_parse_decoder(c, &st->u.decoder, b);
- case sw_unknown:
- b->pos = b->last;
- return NGX_AGAIN;
- }
- }
- }
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