diff options
Diffstat (limited to 'src/http/v3/ngx_http_v3_table.c')
-rw-r--r-- | src/http/v3/ngx_http_v3_table.c | 715 |
1 files changed, 715 insertions, 0 deletions
diff --git a/src/http/v3/ngx_http_v3_table.c b/src/http/v3/ngx_http_v3_table.c new file mode 100644 index 000000000..f49a8fc5e --- /dev/null +++ b/src/http/v3/ngx_http_v3_table.c @@ -0,0 +1,715 @@ + +/* + * Copyright (C) Roman Arutyunyan + * Copyright (C) Nginx, Inc. + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_http.h> + + +#define ngx_http_v3_table_entry_size(n, v) ((n)->len + (v)->len + 32) + + +static ngx_int_t ngx_http_v3_evict(ngx_connection_t *c, size_t target); +static void ngx_http_v3_unblock(void *data); +static ngx_int_t ngx_http_v3_new_entry(ngx_connection_t *c); + + +typedef struct { + ngx_queue_t queue; + ngx_connection_t *connection; + ngx_uint_t *nblocked; +} ngx_http_v3_block_t; + + +static ngx_http_v3_field_t ngx_http_v3_static_table[] = { + + { ngx_string(":authority"), ngx_string("") }, + { ngx_string(":path"), ngx_string("/") }, + { ngx_string("age"), ngx_string("0") }, + { ngx_string("content-disposition"), ngx_string("") }, + { ngx_string("content-length"), ngx_string("0") }, + { ngx_string("cookie"), ngx_string("") }, + { ngx_string("date"), ngx_string("") }, + { ngx_string("etag"), ngx_string("") }, + { ngx_string("if-modified-since"), ngx_string("") }, + { ngx_string("if-none-match"), ngx_string("") }, + { ngx_string("last-modified"), ngx_string("") }, + { ngx_string("link"), ngx_string("") }, + { ngx_string("location"), ngx_string("") }, + { ngx_string("referer"), ngx_string("") }, + { ngx_string("set-cookie"), ngx_string("") }, + { ngx_string(":method"), ngx_string("CONNECT") }, + { ngx_string(":method"), ngx_string("DELETE") }, + { ngx_string(":method"), ngx_string("GET") }, + { ngx_string(":method"), ngx_string("HEAD") }, + { ngx_string(":method"), ngx_string("OPTIONS") }, + { ngx_string(":method"), ngx_string("POST") }, + { ngx_string(":method"), ngx_string("PUT") }, + { ngx_string(":scheme"), ngx_string("http") }, + { ngx_string(":scheme"), ngx_string("https") }, + { ngx_string(":status"), ngx_string("103") }, + { ngx_string(":status"), ngx_string("200") }, + { ngx_string(":status"), ngx_string("304") }, + { ngx_string(":status"), ngx_string("404") }, + { ngx_string(":status"), ngx_string("503") }, + { ngx_string("accept"), ngx_string("*/*") }, + { ngx_string("accept"), + ngx_string("application/dns-message") }, + { ngx_string("accept-encoding"), ngx_string("gzip, deflate, br") }, + { ngx_string("accept-ranges"), ngx_string("bytes") }, + { ngx_string("access-control-allow-headers"), + ngx_string("cache-control") }, + { ngx_string("access-control-allow-headers"), + ngx_string("content-type") }, + { ngx_string("access-control-allow-origin"), + ngx_string("*") }, + { ngx_string("cache-control"), ngx_string("max-age=0") }, + { ngx_string("cache-control"), ngx_string("max-age=2592000") }, + { ngx_string("cache-control"), ngx_string("max-age=604800") }, + { ngx_string("cache-control"), ngx_string("no-cache") }, + { ngx_string("cache-control"), ngx_string("no-store") }, + { ngx_string("cache-control"), + ngx_string("public, max-age=31536000") }, + { ngx_string("content-encoding"), ngx_string("br") }, + { ngx_string("content-encoding"), ngx_string("gzip") }, + { ngx_string("content-type"), + ngx_string("application/dns-message") }, + { ngx_string("content-type"), + ngx_string("application/javascript") }, + { ngx_string("content-type"), ngx_string("application/json") }, + { ngx_string("content-type"), + ngx_string("application/x-www-form-urlencoded") }, + { ngx_string("content-type"), ngx_string("image/gif") }, + { ngx_string("content-type"), ngx_string("image/jpeg") }, + { ngx_string("content-type"), ngx_string("image/png") }, + { ngx_string("content-type"), ngx_string("text/css") }, + { ngx_string("content-type"), + ngx_string("text/html;charset=utf-8") }, + { ngx_string("content-type"), ngx_string("text/plain") }, + { ngx_string("content-type"), + ngx_string("text/plain;charset=utf-8") }, + { ngx_string("range"), ngx_string("bytes=0-") }, + { ngx_string("strict-transport-security"), + ngx_string("max-age=31536000") }, + { ngx_string("strict-transport-security"), + ngx_string("max-age=31536000;includesubdomains") }, + { ngx_string("strict-transport-security"), + ngx_string("max-age=31536000;includesubdomains;preload") }, + { ngx_string("vary"), ngx_string("accept-encoding") }, + { ngx_string("vary"), ngx_string("origin") }, + { ngx_string("x-content-type-options"), + ngx_string("nosniff") }, + { ngx_string("x-xss-protection"), ngx_string("1;mode=block") }, + { ngx_string(":status"), ngx_string("100") }, + { ngx_string(":status"), ngx_string("204") }, + { ngx_string(":status"), ngx_string("206") }, + { ngx_string(":status"), ngx_string("302") }, + { ngx_string(":status"), ngx_string("400") }, + { ngx_string(":status"), ngx_string("403") }, + { ngx_string(":status"), ngx_string("421") }, + { ngx_string(":status"), ngx_string("425") }, + { ngx_string(":status"), ngx_string("500") }, + { ngx_string("accept-language"), ngx_string("") }, + { ngx_string("access-control-allow-credentials"), + ngx_string("FALSE") }, + { ngx_string("access-control-allow-credentials"), + ngx_string("TRUE") }, + { ngx_string("access-control-allow-headers"), + ngx_string("*") }, + { ngx_string("access-control-allow-methods"), + ngx_string("get") }, + { ngx_string("access-control-allow-methods"), + ngx_string("get, post, options") }, + { ngx_string("access-control-allow-methods"), + ngx_string("options") }, + { ngx_string("access-control-expose-headers"), + ngx_string("content-length") }, + { ngx_string("access-control-request-headers"), + ngx_string("content-type") }, + { ngx_string("access-control-request-method"), + ngx_string("get") }, + { ngx_string("access-control-request-method"), + ngx_string("post") }, + { ngx_string("alt-svc"), ngx_string("clear") }, + { ngx_string("authorization"), ngx_string("") }, + { ngx_string("content-security-policy"), + ngx_string("script-src 'none';object-src 'none';base-uri 'none'") }, + { ngx_string("early-data"), ngx_string("1") }, + { ngx_string("expect-ct"), ngx_string("") }, + { ngx_string("forwarded"), ngx_string("") }, + { ngx_string("if-range"), ngx_string("") }, + { ngx_string("origin"), ngx_string("") }, + { ngx_string("purpose"), ngx_string("prefetch") }, + { ngx_string("server"), ngx_string("") }, + { ngx_string("timing-allow-origin"), ngx_string("*") }, + { ngx_string("upgrade-insecure-requests"), + ngx_string("1") }, + { ngx_string("user-agent"), ngx_string("") }, + { ngx_string("x-forwarded-for"), ngx_string("") }, + { ngx_string("x-frame-options"), ngx_string("deny") }, + { ngx_string("x-frame-options"), ngx_string("sameorigin") } +}; + + +ngx_int_t +ngx_http_v3_ref_insert(ngx_connection_t *c, ngx_uint_t dynamic, + ngx_uint_t index, ngx_str_t *value) +{ + ngx_str_t name; + ngx_http_v3_session_t *h3c; + ngx_http_v3_dynamic_table_t *dt; + + if (dynamic) { + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 ref insert dynamic[%ui] \"%V\"", index, value); + + h3c = ngx_http_v3_get_session(c); + dt = &h3c->table; + + if (dt->base + dt->nelts <= index) { + return NGX_HTTP_V3_ERR_ENCODER_STREAM_ERROR; + } + + index = dt->base + dt->nelts - 1 - index; + + if (ngx_http_v3_lookup(c, index, &name, NULL) != NGX_OK) { + return NGX_HTTP_V3_ERR_ENCODER_STREAM_ERROR; + } + + } else { + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 ref insert static[%ui] \"%V\"", index, value); + + if (ngx_http_v3_lookup_static(c, index, &name, NULL) != NGX_OK) { + return NGX_HTTP_V3_ERR_ENCODER_STREAM_ERROR; + } + } + + return ngx_http_v3_insert(c, &name, value); +} + + +ngx_int_t +ngx_http_v3_insert(ngx_connection_t *c, ngx_str_t *name, ngx_str_t *value) +{ + u_char *p; + size_t size; + ngx_http_v3_field_t *field; + ngx_http_v3_session_t *h3c; + ngx_http_v3_dynamic_table_t *dt; + + size = ngx_http_v3_table_entry_size(name, value); + + h3c = ngx_http_v3_get_session(c); + dt = &h3c->table; + + if (size > dt->capacity) { + ngx_log_error(NGX_LOG_ERR, c->log, 0, + "not enough dynamic table capacity"); + return NGX_HTTP_V3_ERR_ENCODER_STREAM_ERROR; + } + + ngx_log_debug4(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 insert [%ui] \"%V\":\"%V\", size:%uz", + dt->base + dt->nelts, name, value, size); + + p = ngx_alloc(sizeof(ngx_http_v3_field_t) + name->len + value->len, + c->log); + if (p == NULL) { + return NGX_ERROR; + } + + field = (ngx_http_v3_field_t *) p; + + field->name.data = p + sizeof(ngx_http_v3_field_t); + field->name.len = name->len; + field->value.data = ngx_cpymem(field->name.data, name->data, name->len); + field->value.len = value->len; + ngx_memcpy(field->value.data, value->data, value->len); + + dt->elts[dt->nelts++] = field; + dt->size += size; + + dt->insert_count++; + + if (ngx_http_v3_evict(c, dt->capacity) != NGX_OK) { + return NGX_ERROR; + } + + ngx_post_event(&dt->send_insert_count, &ngx_posted_events); + + if (ngx_http_v3_new_entry(c) != NGX_OK) { + return NGX_ERROR; + } + + return NGX_OK; +} + + +void +ngx_http_v3_inc_insert_count_handler(ngx_event_t *ev) +{ + ngx_connection_t *c; + ngx_http_v3_session_t *h3c; + ngx_http_v3_dynamic_table_t *dt; + + c = ev->data; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 inc insert count handler"); + + h3c = ngx_http_v3_get_session(c); + dt = &h3c->table; + + if (dt->insert_count > dt->ack_insert_count) { + if (ngx_http_v3_send_inc_insert_count(c, + dt->insert_count - dt->ack_insert_count) + != NGX_OK) + { + return; + } + + dt->ack_insert_count = dt->insert_count; + } +} + + +ngx_int_t +ngx_http_v3_set_capacity(ngx_connection_t *c, ngx_uint_t capacity) +{ + ngx_uint_t max, prev_max; + ngx_http_v3_field_t **elts; + ngx_http_v3_session_t *h3c; + ngx_http_v3_srv_conf_t *h3scf; + ngx_http_v3_dynamic_table_t *dt; + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 set capacity %ui", capacity); + + h3c = ngx_http_v3_get_session(c); + h3scf = ngx_http_v3_get_module_srv_conf(c, ngx_http_v3_module); + + if (capacity > h3scf->max_table_capacity) { + ngx_log_error(NGX_LOG_INFO, c->log, 0, + "client exceeded http3_max_table_capacity limit"); + return NGX_HTTP_V3_ERR_ENCODER_STREAM_ERROR; + } + + if (ngx_http_v3_evict(c, capacity) != NGX_OK) { + return NGX_HTTP_V3_ERR_ENCODER_STREAM_ERROR; + } + + dt = &h3c->table; + max = capacity / 32; + prev_max = dt->capacity / 32; + + if (max > prev_max) { + elts = ngx_alloc(max * sizeof(void *), c->log); + if (elts == NULL) { + return NGX_ERROR; + } + + if (dt->elts) { + ngx_memcpy(elts, dt->elts, dt->nelts * sizeof(void *)); + ngx_free(dt->elts); + } + + dt->elts = elts; + } + + dt->capacity = capacity; + + return NGX_OK; +} + + +void +ngx_http_v3_cleanup_table(ngx_http_v3_session_t *h3c) +{ + ngx_uint_t n; + ngx_http_v3_dynamic_table_t *dt; + + dt = &h3c->table; + + if (dt->elts == NULL) { + return; + } + + for (n = 0; n < dt->nelts; n++) { + ngx_free(dt->elts[n]); + } + + ngx_free(dt->elts); +} + + +static ngx_int_t +ngx_http_v3_evict(ngx_connection_t *c, size_t target) +{ + size_t size; + ngx_uint_t n; + ngx_http_v3_field_t *field; + ngx_http_v3_session_t *h3c; + ngx_http_v3_dynamic_table_t *dt; + + h3c = ngx_http_v3_get_session(c); + dt = &h3c->table; + n = 0; + + while (dt->size > target) { + field = dt->elts[n++]; + size = ngx_http_v3_table_entry_size(&field->name, &field->value); + + ngx_log_debug4(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 evict [%ui] \"%V\":\"%V\" size:%uz", + dt->base, &field->name, &field->value, size); + + ngx_free(field); + dt->size -= size; + } + + if (n) { + dt->nelts -= n; + dt->base += n; + ngx_memmove(dt->elts, &dt->elts[n], dt->nelts * sizeof(void *)); + } + + return NGX_OK; +} + + +ngx_int_t +ngx_http_v3_duplicate(ngx_connection_t *c, ngx_uint_t index) +{ + ngx_str_t name, value; + ngx_http_v3_session_t *h3c; + ngx_http_v3_dynamic_table_t *dt; + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 duplicate %ui", index); + + h3c = ngx_http_v3_get_session(c); + dt = &h3c->table; + + if (dt->base + dt->nelts <= index) { + return NGX_HTTP_V3_ERR_ENCODER_STREAM_ERROR; + } + + index = dt->base + dt->nelts - 1 - index; + + if (ngx_http_v3_lookup(c, index, &name, &value) != NGX_OK) { + return NGX_HTTP_V3_ERR_ENCODER_STREAM_ERROR; + } + + return ngx_http_v3_insert(c, &name, &value); +} + + +ngx_int_t +ngx_http_v3_ack_section(ngx_connection_t *c, ngx_uint_t stream_id) +{ + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 ack section %ui", stream_id); + + /* we do not use dynamic tables */ + + return NGX_HTTP_V3_ERR_DECODER_STREAM_ERROR; +} + + +ngx_int_t +ngx_http_v3_inc_insert_count(ngx_connection_t *c, ngx_uint_t inc) +{ + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 increment insert count %ui", inc); + + /* we do not use dynamic tables */ + + return NGX_HTTP_V3_ERR_DECODER_STREAM_ERROR; +} + + +ngx_int_t +ngx_http_v3_lookup_static(ngx_connection_t *c, ngx_uint_t index, + ngx_str_t *name, ngx_str_t *value) +{ + ngx_uint_t nelts; + ngx_http_v3_field_t *field; + + nelts = sizeof(ngx_http_v3_static_table) + / sizeof(ngx_http_v3_static_table[0]); + + if (index >= nelts) { + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 static[%ui] lookup out of bounds: %ui", + index, nelts); + return NGX_ERROR; + } + + field = &ngx_http_v3_static_table[index]; + + ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 static[%ui] lookup \"%V\":\"%V\"", + index, &field->name, &field->value); + + if (name) { + *name = field->name; + } + + if (value) { + *value = field->value; + } + + return NGX_OK; +} + + +ngx_int_t +ngx_http_v3_lookup(ngx_connection_t *c, ngx_uint_t index, ngx_str_t *name, + ngx_str_t *value) +{ + ngx_http_v3_field_t *field; + ngx_http_v3_session_t *h3c; + ngx_http_v3_dynamic_table_t *dt; + + h3c = ngx_http_v3_get_session(c); + dt = &h3c->table; + + if (index < dt->base || index - dt->base >= dt->nelts) { + ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 dynamic[%ui] lookup out of bounds: [%ui,%ui]", + index, dt->base, dt->base + dt->nelts); + return NGX_ERROR; + } + + field = dt->elts[index - dt->base]; + + ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 dynamic[%ui] lookup \"%V\":\"%V\"", + index, &field->name, &field->value); + + if (name) { + *name = field->name; + } + + if (value) { + *value = field->value; + } + + return NGX_OK; +} + + +ngx_int_t +ngx_http_v3_decode_insert_count(ngx_connection_t *c, ngx_uint_t *insert_count) +{ + ngx_uint_t max_entries, full_range, max_value, + max_wrapped, req_insert_count; + ngx_http_v3_srv_conf_t *h3scf; + ngx_http_v3_session_t *h3c; + ngx_http_v3_dynamic_table_t *dt; + + /* QPACK 4.5.1.1. Required Insert Count */ + + if (*insert_count == 0) { + return NGX_OK; + } + + h3c = ngx_http_v3_get_session(c); + dt = &h3c->table; + + h3scf = ngx_http_v3_get_module_srv_conf(c, ngx_http_v3_module); + + max_entries = h3scf->max_table_capacity / 32; + full_range = 2 * max_entries; + + if (*insert_count > full_range) { + return NGX_HTTP_V3_ERR_DECOMPRESSION_FAILED; + } + + max_value = dt->base + dt->nelts + max_entries; + max_wrapped = (max_value / full_range) * full_range; + req_insert_count = max_wrapped + *insert_count - 1; + + if (req_insert_count > max_value) { + if (req_insert_count <= full_range) { + return NGX_HTTP_V3_ERR_DECOMPRESSION_FAILED; + } + + req_insert_count -= full_range; + } + + if (req_insert_count == 0) { + return NGX_HTTP_V3_ERR_DECOMPRESSION_FAILED; + } + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 decode insert_count %ui -> %ui", + *insert_count, req_insert_count); + + *insert_count = req_insert_count; + + return NGX_OK; +} + + +ngx_int_t +ngx_http_v3_check_insert_count(ngx_connection_t *c, ngx_uint_t insert_count) +{ + size_t n; + ngx_pool_cleanup_t *cln; + ngx_http_v3_block_t *block; + ngx_http_v3_session_t *h3c; + ngx_http_v3_srv_conf_t *h3scf; + ngx_http_v3_dynamic_table_t *dt; + + h3c = ngx_http_v3_get_session(c); + dt = &h3c->table; + + n = dt->base + dt->nelts; + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 check insert count req:%ui, have:%ui", + insert_count, n); + + if (n >= insert_count) { + return NGX_OK; + } + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http3 block stream"); + + block = NULL; + + for (cln = c->pool->cleanup; cln; cln = cln->next) { + if (cln->handler == ngx_http_v3_unblock) { + block = cln->data; + break; + } + } + + if (block == NULL) { + cln = ngx_pool_cleanup_add(c->pool, sizeof(ngx_http_v3_block_t)); + if (cln == NULL) { + return NGX_ERROR; + } + + cln->handler = ngx_http_v3_unblock; + + block = cln->data; + block->queue.prev = NULL; + block->connection = c; + block->nblocked = &h3c->nblocked; + } + + if (block->queue.prev == NULL) { + h3scf = ngx_http_v3_get_module_srv_conf(c, ngx_http_v3_module); + + if (h3c->nblocked == h3scf->max_blocked_streams) { + ngx_log_error(NGX_LOG_INFO, c->log, 0, + "client exceeded http3_max_blocked_streams limit"); + + ngx_http_v3_finalize_connection(c, + NGX_HTTP_V3_ERR_DECOMPRESSION_FAILED, + "too many blocked streams"); + return NGX_HTTP_V3_ERR_DECOMPRESSION_FAILED; + } + + h3c->nblocked++; + ngx_queue_insert_tail(&h3c->blocked, &block->queue); + } + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 blocked:%ui", h3c->nblocked); + + return NGX_BUSY; +} + + +void +ngx_http_v3_ack_insert_count(ngx_connection_t *c, uint64_t insert_count) +{ + ngx_http_v3_session_t *h3c; + ngx_http_v3_dynamic_table_t *dt; + + h3c = ngx_http_v3_get_session(c); + dt = &h3c->table; + + if (dt->ack_insert_count < insert_count) { + dt->ack_insert_count = insert_count; + } +} + + +static void +ngx_http_v3_unblock(void *data) +{ + ngx_http_v3_block_t *block = data; + + if (block->queue.prev) { + ngx_queue_remove(&block->queue); + block->queue.prev = NULL; + (*block->nblocked)--; + } +} + + +static ngx_int_t +ngx_http_v3_new_entry(ngx_connection_t *c) +{ + ngx_queue_t *q; + ngx_connection_t *bc; + ngx_http_v3_block_t *block; + ngx_http_v3_session_t *h3c; + + h3c = ngx_http_v3_get_session(c); + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 new dynamic entry, blocked:%ui", h3c->nblocked); + + while (!ngx_queue_empty(&h3c->blocked)) { + q = ngx_queue_head(&h3c->blocked); + block = (ngx_http_v3_block_t *) q; + bc = block->connection; + + ngx_log_debug0(NGX_LOG_DEBUG_HTTP, bc->log, 0, "http3 unblock stream"); + + ngx_http_v3_unblock(block); + ngx_post_event(bc->read, &ngx_posted_events); + } + + return NGX_OK; +} + + +ngx_int_t +ngx_http_v3_set_param(ngx_connection_t *c, uint64_t id, uint64_t value) +{ + switch (id) { + + case NGX_HTTP_V3_PARAM_MAX_TABLE_CAPACITY: + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 param QPACK_MAX_TABLE_CAPACITY:%uL", value); + break; + + case NGX_HTTP_V3_PARAM_MAX_FIELD_SECTION_SIZE: + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 param SETTINGS_MAX_FIELD_SECTION_SIZE:%uL", + value); + break; + + case NGX_HTTP_V3_PARAM_BLOCKED_STREAMS: + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 param QPACK_BLOCKED_STREAMS:%uL", value); + break; + + default: + + ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, + "http3 param #%uL:%uL", id, value); + } + + return NGX_OK; +} |