Mercurial > hg > nginx-quic
view src/http/modules/ngx_http_quic_module.c @ 8437:d5f93733c17d quic
QUIC: relaxed client id requirements.
Client IDs cannot be reused on different paths. This change allows to reuse
client id previosly seen on the same path (but with different dcid) in case
when no unused client IDs are available.
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Wed, 05 May 2021 18:11:55 +0300 |
parents | 9ec3e71f8a61 |
children | f8ad3dd142ad |
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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 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_quic_add_variables(ngx_conf_t *cf); static void *ngx_http_quic_create_srv_conf(ngx_conf_t *cf); static char *ngx_http_quic_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child); static char *ngx_http_quic_max_ack_delay(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_quic_max_udp_payload_size(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_quic_host_key(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_conf_post_t ngx_http_quic_max_ack_delay_post = { ngx_http_quic_max_ack_delay }; static ngx_conf_post_t ngx_http_quic_max_udp_payload_size_post = { ngx_http_quic_max_udp_payload_size }; static ngx_conf_num_bounds_t ngx_http_quic_ack_delay_exponent_bounds = { ngx_conf_check_num_bounds, 0, 20 }; static ngx_conf_num_bounds_t ngx_http_quic_active_connection_id_limit_bounds = { ngx_conf_check_num_bounds, 2, -1 }; static ngx_command_t ngx_http_quic_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_quic_conf_t, tp.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_quic_conf_t, tp.max_ack_delay), &ngx_http_quic_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_quic_conf_t, tp.max_udp_payload_size), &ngx_http_quic_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_quic_conf_t, tp.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_quic_conf_t, tp.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_quic_conf_t, tp.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_quic_conf_t, tp.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_quic_conf_t, tp.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_quic_conf_t, tp.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_quic_conf_t, tp.ack_delay_exponent), &ngx_http_quic_ack_delay_exponent_bounds }, { ngx_string("quic_disable_active_migration"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_flag_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_quic_conf_t, tp.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_quic_conf_t, tp.active_connection_id_limit), &ngx_http_quic_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_quic_conf_t, retry), NULL }, { ngx_string("quic_host_key"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_http_quic_host_key, NGX_HTTP_SRV_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_quic_module_ctx = { ngx_http_quic_add_variables, /* preconfiguration */ NULL, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ ngx_http_quic_create_srv_conf, /* create server configuration */ ngx_http_quic_merge_srv_conf, /* merge server configuration */ NULL, /* create location configuration */ NULL /* merge location configuration */ }; ngx_module_t ngx_http_quic_module = { NGX_MODULE_V1, &ngx_http_quic_module_ctx, /* module context */ ngx_http_quic_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_quic_vars[] = { { ngx_string("quic"), NULL, ngx_http_variable_quic, 0, 0, 0 }, ngx_http_null_variable }; static ngx_str_t ngx_http_quic_salt = ngx_string("ngx_quic"); ngx_int_t ngx_http_quic_init(ngx_connection_t *c) { ngx_quic_conf_t *qcf; ngx_http_connection_t *hc, *phc; ngx_http_core_loc_conf_t *clcf; hc = c->data; hc->ssl = 1; if (c->quic == NULL) { c->log->connection = c->number; qcf = ngx_http_get_module_srv_conf(hc->conf_ctx, ngx_http_quic_module); ngx_quic_run(c, qcf); return NGX_DONE; } ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http init quic stream"); phc = ngx_http_quic_get_connection(c); if (phc->ssl_servername) { hc->ssl_servername = phc->ssl_servername; hc->conf_ctx = phc->conf_ctx; clcf = ngx_http_get_module_loc_conf(hc->conf_ctx, ngx_http_core_module); ngx_set_connection_log(c, clcf->error_log); } return NGX_OK; } 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->quic) { 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_quic_add_variables(ngx_conf_t *cf) { ngx_http_variable_t *var, *v; for (v = ngx_http_quic_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_quic_create_srv_conf(ngx_conf_t *cf) { ngx_quic_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_quic_conf_t)); if (conf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * * conf->tp.original_dcid = { 0, NULL }; * conf->tp.initial_scid = { 0, NULL }; * conf->tp.retry_scid = { 0, NULL }; * conf->tp.sr_token = { 0 } * conf->tp.sr_enabled = 0 * conf->tp.preferred_address = NULL * conf->host_key = { 0, NULL } */ conf->tp.max_idle_timeout = NGX_CONF_UNSET_MSEC; conf->tp.max_ack_delay = NGX_CONF_UNSET_MSEC; conf->tp.max_udp_payload_size = NGX_CONF_UNSET_SIZE; conf->tp.initial_max_data = NGX_CONF_UNSET_SIZE; conf->tp.initial_max_stream_data_bidi_local = NGX_CONF_UNSET_SIZE; conf->tp.initial_max_stream_data_bidi_remote = NGX_CONF_UNSET_SIZE; conf->tp.initial_max_stream_data_uni = NGX_CONF_UNSET_SIZE; conf->tp.initial_max_streams_bidi = NGX_CONF_UNSET_UINT; conf->tp.initial_max_streams_uni = NGX_CONF_UNSET_UINT; conf->tp.ack_delay_exponent = NGX_CONF_UNSET_UINT; conf->tp.disable_active_migration = NGX_CONF_UNSET; conf->tp.active_connection_id_limit = NGX_CONF_UNSET_UINT; conf->retry = NGX_CONF_UNSET; conf->require_alpn = 1; return conf; } static char * ngx_http_quic_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_quic_conf_t *prev = parent; ngx_quic_conf_t *conf = child; ngx_http_ssl_srv_conf_t *sscf; ngx_conf_merge_msec_value(conf->tp.max_idle_timeout, prev->tp.max_idle_timeout, 60000); ngx_conf_merge_msec_value(conf->tp.max_ack_delay, prev->tp.max_ack_delay, NGX_QUIC_DEFAULT_MAX_ACK_DELAY); ngx_conf_merge_size_value(conf->tp.max_udp_payload_size, prev->tp.max_udp_payload_size, NGX_QUIC_MAX_UDP_PAYLOAD_SIZE); ngx_conf_merge_size_value(conf->tp.initial_max_data, prev->tp.initial_max_data, 16 * NGX_QUIC_STREAM_BUFSIZE); ngx_conf_merge_size_value(conf->tp.initial_max_stream_data_bidi_local, prev->tp.initial_max_stream_data_bidi_local, NGX_QUIC_STREAM_BUFSIZE); ngx_conf_merge_size_value(conf->tp.initial_max_stream_data_bidi_remote, prev->tp.initial_max_stream_data_bidi_remote, NGX_QUIC_STREAM_BUFSIZE); ngx_conf_merge_size_value(conf->tp.initial_max_stream_data_uni, prev->tp.initial_max_stream_data_uni, NGX_QUIC_STREAM_BUFSIZE); ngx_conf_merge_uint_value(conf->tp.initial_max_streams_bidi, prev->tp.initial_max_streams_bidi, 16); ngx_conf_merge_uint_value(conf->tp.initial_max_streams_uni, prev->tp.initial_max_streams_uni, 3); ngx_conf_merge_uint_value(conf->tp.ack_delay_exponent, prev->tp.ack_delay_exponent, NGX_QUIC_DEFAULT_ACK_DELAY_EXPONENT); ngx_conf_merge_value(conf->tp.disable_active_migration, prev->tp.disable_active_migration, 0); ngx_conf_merge_uint_value(conf->tp.active_connection_id_limit, prev->tp.active_connection_id_limit, 2); ngx_conf_merge_value(conf->retry, prev->retry, 0); ngx_conf_merge_str_value(conf->host_key, prev->host_key, ""); if (conf->host_key.len == 0) { conf->host_key.len = NGX_QUIC_DEFAULT_HOST_KEY_LEN; conf->host_key.data = ngx_palloc(cf->pool, conf->host_key.len); if (conf->host_key.data == NULL) { return NGX_CONF_ERROR; } if (RAND_bytes(conf->host_key.data, NGX_QUIC_DEFAULT_HOST_KEY_LEN) <= 0) { return NGX_CONF_ERROR; } } if (ngx_quic_derive_key(cf->log, "av_token_key", &conf->host_key, &ngx_http_quic_salt, conf->av_token_key, NGX_QUIC_AV_KEY_LEN) != NGX_OK) { return NGX_CONF_ERROR; } if (ngx_quic_derive_key(cf->log, "sr_token_key", &conf->host_key, &ngx_http_quic_salt, conf->sr_token_key, NGX_QUIC_SR_KEY_LEN) != NGX_OK) { return NGX_CONF_ERROR; } sscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_ssl_module); conf->ssl = &sscf->ssl; return NGX_CONF_OK; } static char * ngx_http_quic_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_quic_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; } static char * ngx_http_quic_host_key(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_quic_conf_t *qcf = conf; u_char *buf; size_t size; ssize_t n; ngx_str_t *value; ngx_file_t file; ngx_file_info_t fi; if (qcf->host_key.len) { return "is duplicate"; } buf = NULL; #if (NGX_SUPPRESS_WARN) size = 0; #endif value = cf->args->elts; if (ngx_conf_full_name(cf->cycle, &value[1], 1) != NGX_OK) { return NGX_CONF_ERROR; } ngx_memzero(&file, sizeof(ngx_file_t)); file.name = value[1]; file.log = cf->log; file.fd = ngx_open_file(file.name.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); if (file.fd == NGX_INVALID_FILE) { ngx_conf_log_error(NGX_LOG_EMERG, cf, ngx_errno, ngx_open_file_n " \"%V\" failed", &file.name); return NGX_CONF_ERROR; } if (ngx_fd_info(file.fd, &fi) == NGX_FILE_ERROR) { ngx_conf_log_error(NGX_LOG_CRIT, cf, ngx_errno, ngx_fd_info_n " \"%V\" failed", &file.name); goto failed; } size = ngx_file_size(&fi); if (size == 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "\"%V\" zero key size", &file.name); goto failed; } buf = ngx_pnalloc(cf->pool, size); if (buf == NULL) { goto failed; } n = ngx_read_file(&file, buf, size, 0); if (n == NGX_ERROR) { ngx_conf_log_error(NGX_LOG_CRIT, cf, ngx_errno, ngx_read_file_n " \"%V\" failed", &file.name); goto failed; } if ((size_t) n != size) { ngx_conf_log_error(NGX_LOG_CRIT, cf, 0, ngx_read_file_n " \"%V\" returned only " "%z bytes instead of %uz", &file.name, n, size); goto failed; } qcf->host_key.data = buf; qcf->host_key.len = n; if (ngx_close_file(file.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno, ngx_close_file_n " \"%V\" failed", &file.name); } return NGX_CONF_OK; failed: if (ngx_close_file(file.fd) == NGX_FILE_ERROR) { ngx_log_error(NGX_LOG_ALERT, cf->log, ngx_errno, ngx_close_file_n " \"%V\" failed", &file.name); } if (buf) { ngx_explicit_memzero(buf, size); } return NGX_CONF_ERROR; }