Mercurial > hg > nginx-quic
view src/http/v3/ngx_http_v3_module.c @ 7949:032cb35ce758 quic
HTTP/3: http3_max_field_size directive to limit string size.
Client streams may send literal strings which are now limited in size by the
new directive. The default value is 4096.
The directive is similar to HTTP/2 directive http2_max_field_size.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Mon, 29 Jun 2020 15:56:14 +0300 |
parents | 6633f17044eb |
children | c9538aef3211 |
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/* * Copyright (C) Nginx, Inc. * Copyright (C) Roman Arutyunyan */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> static char *ngx_http_v3_max_ack_delay(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_v3_max_udp_payload_size(ngx_conf_t *cf, void *post, void *data); static ngx_conf_post_t ngx_http_v3_max_ack_delay_post = { ngx_http_v3_max_ack_delay }; static ngx_conf_post_t ngx_http_v3_max_udp_payload_size_post = { ngx_http_v3_max_udp_payload_size }; static ngx_conf_num_bounds_t ngx_http_v3_ack_delay_exponent_bounds = { ngx_conf_check_num_bounds, 0, 20 }; static ngx_conf_num_bounds_t ngx_http_v3_active_connection_id_limit_bounds = { ngx_conf_check_num_bounds, 2, -1 }; static ngx_command_t ngx_http_v3_commands[] = { { ngx_string("quic_max_idle_timeout"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_msec_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.max_idle_timeout), NULL }, { ngx_string("quic_max_ack_delay"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_msec_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.max_ack_delay), &ngx_http_v3_max_ack_delay_post }, { ngx_string("quic_max_udp_payload_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.max_udp_payload_size), &ngx_http_v3_max_udp_payload_size_post }, { ngx_string("quic_initial_max_data"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.initial_max_data), NULL }, { ngx_string("quic_initial_max_stream_data_bidi_local"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.initial_max_stream_data_bidi_local), NULL }, { ngx_string("quic_initial_max_stream_data_bidi_remote"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.initial_max_stream_data_bidi_remote), NULL }, { ngx_string("quic_initial_max_stream_data_uni"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.initial_max_stream_data_uni), NULL }, { ngx_string("quic_initial_max_streams_bidi"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.initial_max_streams_bidi), NULL }, { ngx_string("quic_initial_max_streams_uni"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.initial_max_streams_uni), NULL }, { ngx_string("quic_ack_delay_exponent"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.ack_delay_exponent), &ngx_http_v3_ack_delay_exponent_bounds }, { ngx_string("quic_active_migration"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.disable_active_migration), NULL }, { ngx_string("quic_active_connection_id_limit"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.active_connection_id_limit), &ngx_http_v3_active_connection_id_limit_bounds }, { ngx_string("quic_retry"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, quic.retry), NULL }, { ngx_string("http3_max_field_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v3_srv_conf_t, max_field_size), NULL }, ngx_null_command }; static ngx_int_t ngx_http_variable_quic(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_variable_http3(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_v3_add_variables(ngx_conf_t *cf); static void *ngx_http_v3_create_srv_conf(ngx_conf_t *cf); static char *ngx_http_v3_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child); static ngx_http_module_t ngx_http_v3_module_ctx = { ngx_http_v3_add_variables, /* preconfiguration */ NULL, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ ngx_http_v3_create_srv_conf, /* create server configuration */ ngx_http_v3_merge_srv_conf, /* merge server configuration */ NULL, /* create location configuration */ NULL /* merge location configuration */ }; ngx_module_t ngx_http_v3_module = { NGX_MODULE_V1, &ngx_http_v3_module_ctx, /* module context */ ngx_http_v3_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_http_variable_t ngx_http_v3_vars[] = { { ngx_string("quic"), NULL, ngx_http_variable_quic, 0, 0, 0 }, { ngx_string("http3"), NULL, ngx_http_variable_http3, 0, 0, 0 }, ngx_http_null_variable }; static ngx_int_t ngx_http_variable_quic(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { if (r->connection->qs) { v->len = 4; v->valid = 1; v->no_cacheable = 1; v->not_found = 0; v->data = (u_char *) "quic"; return NGX_OK; } v->not_found = 1; return NGX_OK; } static ngx_int_t ngx_http_variable_http3(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { v->valid = 1; v->no_cacheable = 1; v->not_found = 0; v->data = ngx_pnalloc(r->pool, sizeof("h3-xx") - 1); if (v->data == NULL) { return NGX_ERROR; } v->len = ngx_sprintf(v->data, "h3-%d", NGX_QUIC_DRAFT_VERSION) - v->data; return NGX_OK; } static ngx_int_t ngx_http_v3_add_variables(ngx_conf_t *cf) { ngx_http_variable_t *var, *v; for (v = ngx_http_v3_vars; v->name.len; v++) { var = ngx_http_add_variable(cf, &v->name, v->flags); if (var == NULL) { return NGX_ERROR; } var->get_handler = v->get_handler; var->data = v->data; } return NGX_OK; } static void * ngx_http_v3_create_srv_conf(ngx_conf_t *cf) { ngx_http_v3_srv_conf_t *v3cf; v3cf = ngx_pcalloc(cf->pool, sizeof(ngx_http_v3_srv_conf_t)); if (v3cf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * v3cf->quic.original_dcid = { 0, NULL }; * v3cf->quic.initial_scid = { 0, NULL }; * v3cf->quic.retry_scid = { 0, NULL }; * v3cf->quic.stateless_reset_token = { 0 } * conf->quic.preferred_address = NULL */ v3cf->quic.max_idle_timeout = NGX_CONF_UNSET_MSEC; v3cf->quic.max_ack_delay = NGX_CONF_UNSET_MSEC; v3cf->quic.max_udp_payload_size = NGX_CONF_UNSET_SIZE; v3cf->quic.initial_max_data = NGX_CONF_UNSET_SIZE; v3cf->quic.initial_max_stream_data_bidi_local = NGX_CONF_UNSET_SIZE; v3cf->quic.initial_max_stream_data_bidi_remote = NGX_CONF_UNSET_SIZE; v3cf->quic.initial_max_stream_data_uni = NGX_CONF_UNSET_SIZE; v3cf->quic.initial_max_streams_bidi = NGX_CONF_UNSET_UINT; v3cf->quic.initial_max_streams_uni = NGX_CONF_UNSET_UINT; v3cf->quic.ack_delay_exponent = NGX_CONF_UNSET_UINT; v3cf->quic.disable_active_migration = NGX_CONF_UNSET_UINT; v3cf->quic.active_connection_id_limit = NGX_CONF_UNSET_UINT; v3cf->quic.retry = NGX_CONF_UNSET; v3cf->max_field_size = NGX_CONF_UNSET_SIZE; return v3cf; } static char * ngx_http_v3_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_v3_srv_conf_t *prev = parent; ngx_http_v3_srv_conf_t *conf = child; ngx_conf_merge_msec_value(conf->quic.max_idle_timeout, prev->quic.max_idle_timeout, 60000); ngx_conf_merge_msec_value(conf->quic.max_ack_delay, prev->quic.max_ack_delay, NGX_QUIC_DEFAULT_MAX_ACK_DELAY); ngx_conf_merge_size_value(conf->quic.max_udp_payload_size, prev->quic.max_udp_payload_size, NGX_QUIC_MAX_UDP_PAYLOAD_SIZE); ngx_conf_merge_size_value(conf->quic.initial_max_data, prev->quic.initial_max_data, 16 * NGX_QUIC_STREAM_BUFSIZE); ngx_conf_merge_size_value(conf->quic.initial_max_stream_data_bidi_local, prev->quic.initial_max_stream_data_bidi_local, NGX_QUIC_STREAM_BUFSIZE); ngx_conf_merge_size_value(conf->quic.initial_max_stream_data_bidi_remote, prev->quic.initial_max_stream_data_bidi_remote, NGX_QUIC_STREAM_BUFSIZE); ngx_conf_merge_size_value(conf->quic.initial_max_stream_data_uni, prev->quic.initial_max_stream_data_uni, NGX_QUIC_STREAM_BUFSIZE); ngx_conf_merge_uint_value(conf->quic.initial_max_streams_bidi, prev->quic.initial_max_streams_bidi, 16); ngx_conf_merge_uint_value(conf->quic.initial_max_streams_uni, prev->quic.initial_max_streams_uni, 16); ngx_conf_merge_uint_value(conf->quic.ack_delay_exponent, prev->quic.ack_delay_exponent, NGX_QUIC_DEFAULT_ACK_DELAY_EXPONENT); ngx_conf_merge_uint_value(conf->quic.disable_active_migration, prev->quic.disable_active_migration, 1); ngx_conf_merge_uint_value(conf->quic.active_connection_id_limit, prev->quic.active_connection_id_limit, 2); ngx_conf_merge_value(conf->quic.retry, prev->quic.retry, 0); if (conf->quic.retry) { if (RAND_bytes(conf->quic.token_key, sizeof(conf->quic.token_key)) <= 0) { return NGX_CONF_ERROR; } } ngx_conf_merge_size_value(conf->max_field_size, prev->max_field_size, NGX_HTTP_V3_DEFAULT_MAX_FIELD_SIZE); return NGX_CONF_OK; } static char * ngx_http_v3_max_ack_delay(ngx_conf_t *cf, void *post, void *data) { ngx_msec_t *sp = data; if (*sp > 16384) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"quic_max_ack_delay\" must be less than 16384"); return NGX_CONF_ERROR; } return NGX_CONF_OK; } static char * ngx_http_v3_max_udp_payload_size(ngx_conf_t *cf, void *post, void *data) { size_t *sp = data; if (*sp < NGX_QUIC_MIN_INITIAL_SIZE || *sp > NGX_QUIC_MAX_UDP_PAYLOAD_SIZE) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"quic_max_udp_payload_size\" must be between " "%d and %d", NGX_QUIC_MIN_INITIAL_SIZE, NGX_QUIC_MAX_UDP_PAYLOAD_SIZE); return NGX_CONF_ERROR; } return NGX_CONF_OK; }