Mercurial > hg > nginx-quic
view src/http/v2/ngx_http_v2_module.c @ 7870:e169cce912c7 quic
Avoid retransmitting of packets with discarded keys.
Sections 4.10.1 and 4.10.2 of quic transport describe discarding of initial
and handshake keys. Since the keys are discarded, we no longer need
to retransmit packets and corresponding queues should be emptied.
This patch removes previously added workaround that did not require
acknowledgement for initial packets, resulting in avoiding retransmission,
which is wrong because a packet could be lost and we have to retransmit it.
author | Vladimir Homutov <vl@nginx.com> |
---|---|
date | Mon, 18 May 2020 13:54:53 +0300 |
parents | 641306096f5b |
children | de0b6f1fe4e4 |
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/* * Copyright (C) Nginx, Inc. * Copyright (C) Valentin V. Bartenev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #include <ngx_http_v2_module.h> static ngx_int_t ngx_http_v2_add_variables(ngx_conf_t *cf); static ngx_int_t ngx_http_v2_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data); static ngx_int_t ngx_http_v2_module_init(ngx_cycle_t *cycle); static void *ngx_http_v2_create_main_conf(ngx_conf_t *cf); static char *ngx_http_v2_init_main_conf(ngx_conf_t *cf, void *conf); static void *ngx_http_v2_create_srv_conf(ngx_conf_t *cf); static char *ngx_http_v2_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child); static void *ngx_http_v2_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_v2_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child); static char *ngx_http_v2_push(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_http_v2_recv_buffer_size(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_v2_pool_size(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_v2_preread_size(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_v2_streams_index_mask(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_v2_chunk_size(ngx_conf_t *cf, void *post, void *data); static char *ngx_http_v2_spdy_deprecated(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_conf_post_t ngx_http_v2_recv_buffer_size_post = { ngx_http_v2_recv_buffer_size }; static ngx_conf_post_t ngx_http_v2_pool_size_post = { ngx_http_v2_pool_size }; static ngx_conf_post_t ngx_http_v2_preread_size_post = { ngx_http_v2_preread_size }; static ngx_conf_post_t ngx_http_v2_streams_index_mask_post = { ngx_http_v2_streams_index_mask }; static ngx_conf_post_t ngx_http_v2_chunk_size_post = { ngx_http_v2_chunk_size }; static ngx_command_t ngx_http_v2_commands[] = { { ngx_string("http2_recv_buffer_size"), NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_MAIN_CONF_OFFSET, offsetof(ngx_http_v2_main_conf_t, recv_buffer_size), &ngx_http_v2_recv_buffer_size_post }, { ngx_string("http2_pool_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_v2_srv_conf_t, pool_size), &ngx_http_v2_pool_size_post }, { ngx_string("http2_max_concurrent_streams"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v2_srv_conf_t, concurrent_streams), NULL }, { ngx_string("http2_max_concurrent_pushes"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v2_srv_conf_t, concurrent_pushes), NULL }, { ngx_string("http2_max_requests"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v2_srv_conf_t, max_requests), NULL }, { ngx_string("http2_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_v2_srv_conf_t, max_field_size), NULL }, { ngx_string("http2_max_header_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_v2_srv_conf_t, max_header_size), NULL }, { ngx_string("http2_body_preread_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_v2_srv_conf_t, preread_size), &ngx_http_v2_preread_size_post }, { ngx_string("http2_streams_index_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_conf_set_num_slot, NGX_HTTP_SRV_CONF_OFFSET, offsetof(ngx_http_v2_srv_conf_t, streams_index_mask), &ngx_http_v2_streams_index_mask_post }, { ngx_string("http2_recv_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_v2_srv_conf_t, recv_timeout), NULL }, { ngx_string("http2_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_v2_srv_conf_t, idle_timeout), NULL }, { ngx_string("http2_chunk_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_size_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_v2_loc_conf_t, chunk_size), &ngx_http_v2_chunk_size_post }, { ngx_string("http2_push_preload"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, ngx_conf_set_flag_slot, NGX_HTTP_LOC_CONF_OFFSET, offsetof(ngx_http_v2_loc_conf_t, push_preload), NULL }, { ngx_string("http2_push"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_v2_push, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, { ngx_string("spdy_recv_buffer_size"), NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1, ngx_http_v2_spdy_deprecated, NGX_HTTP_MAIN_CONF_OFFSET, 0, NULL }, { ngx_string("spdy_pool_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_http_v2_spdy_deprecated, NGX_HTTP_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("spdy_max_concurrent_streams"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_http_v2_spdy_deprecated, NGX_HTTP_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("spdy_streams_index_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_http_v2_spdy_deprecated, NGX_HTTP_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("spdy_recv_timeout"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_http_v2_spdy_deprecated, NGX_HTTP_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("spdy_keepalive_timeout"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_http_v2_spdy_deprecated, NGX_HTTP_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("spdy_headers_comp"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1, ngx_http_v2_spdy_deprecated, NGX_HTTP_SRV_CONF_OFFSET, 0, NULL }, { ngx_string("spdy_chunk_size"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_v2_spdy_deprecated, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_v2_module_ctx = { ngx_http_v2_add_variables, /* preconfiguration */ NULL, /* postconfiguration */ ngx_http_v2_create_main_conf, /* create main configuration */ ngx_http_v2_init_main_conf, /* init main configuration */ ngx_http_v2_create_srv_conf, /* create server configuration */ ngx_http_v2_merge_srv_conf, /* merge server configuration */ ngx_http_v2_create_loc_conf, /* create location configuration */ ngx_http_v2_merge_loc_conf /* merge location configuration */ }; ngx_module_t ngx_http_v2_module = { NGX_MODULE_V1, &ngx_http_v2_module_ctx, /* module context */ ngx_http_v2_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ ngx_http_v2_module_init, /* 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_v2_vars[] = { { ngx_string("http2"), NULL, ngx_http_v2_variable, 0, 0, 0 }, ngx_http_null_variable }; static ngx_int_t ngx_http_v2_add_variables(ngx_conf_t *cf) { ngx_http_variable_t *var, *v; for (v = ngx_http_v2_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 ngx_int_t ngx_http_v2_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, uintptr_t data) { if (r->stream) { #if (NGX_HTTP_SSL) if (r->connection->ssl) { v->len = sizeof("h2") - 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) "h2"; return NGX_OK; } #endif v->len = sizeof("h2c") - 1; v->valid = 1; v->no_cacheable = 0; v->not_found = 0; v->data = (u_char *) "h2c"; return NGX_OK; } *v = ngx_http_variable_null_value; return NGX_OK; } static ngx_int_t ngx_http_v2_module_init(ngx_cycle_t *cycle) { return NGX_OK; } static void * ngx_http_v2_create_main_conf(ngx_conf_t *cf) { ngx_http_v2_main_conf_t *h2mcf; h2mcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_v2_main_conf_t)); if (h2mcf == NULL) { return NULL; } h2mcf->recv_buffer_size = NGX_CONF_UNSET_SIZE; return h2mcf; } static char * ngx_http_v2_init_main_conf(ngx_conf_t *cf, void *conf) { ngx_http_v2_main_conf_t *h2mcf = conf; ngx_conf_init_size_value(h2mcf->recv_buffer_size, 256 * 1024); return NGX_CONF_OK; } static void * ngx_http_v2_create_srv_conf(ngx_conf_t *cf) { ngx_http_v2_srv_conf_t *h2scf; h2scf = ngx_pcalloc(cf->pool, sizeof(ngx_http_v2_srv_conf_t)); if (h2scf == NULL) { return NULL; } h2scf->pool_size = NGX_CONF_UNSET_SIZE; h2scf->concurrent_streams = NGX_CONF_UNSET_UINT; h2scf->concurrent_pushes = NGX_CONF_UNSET_UINT; h2scf->max_requests = NGX_CONF_UNSET_UINT; h2scf->max_field_size = NGX_CONF_UNSET_SIZE; h2scf->max_header_size = NGX_CONF_UNSET_SIZE; h2scf->preread_size = NGX_CONF_UNSET_SIZE; h2scf->streams_index_mask = NGX_CONF_UNSET_UINT; h2scf->recv_timeout = NGX_CONF_UNSET_MSEC; h2scf->idle_timeout = NGX_CONF_UNSET_MSEC; return h2scf; } static char * ngx_http_v2_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_v2_srv_conf_t *prev = parent; ngx_http_v2_srv_conf_t *conf = child; ngx_conf_merge_size_value(conf->pool_size, prev->pool_size, 4096); ngx_conf_merge_uint_value(conf->concurrent_streams, prev->concurrent_streams, 128); ngx_conf_merge_uint_value(conf->concurrent_pushes, prev->concurrent_pushes, 10); ngx_conf_merge_uint_value(conf->max_requests, prev->max_requests, 1000); ngx_conf_merge_size_value(conf->max_field_size, prev->max_field_size, 4096); ngx_conf_merge_size_value(conf->max_header_size, prev->max_header_size, 16384); ngx_conf_merge_size_value(conf->preread_size, prev->preread_size, 65536); ngx_conf_merge_uint_value(conf->streams_index_mask, prev->streams_index_mask, 32 - 1); ngx_conf_merge_msec_value(conf->recv_timeout, prev->recv_timeout, 30000); ngx_conf_merge_msec_value(conf->idle_timeout, prev->idle_timeout, 180000); return NGX_CONF_OK; } static void * ngx_http_v2_create_loc_conf(ngx_conf_t *cf) { ngx_http_v2_loc_conf_t *h2lcf; h2lcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_v2_loc_conf_t)); if (h2lcf == NULL) { return NULL; } /* * set by ngx_pcalloc(): * * h2lcf->pushes = NULL; */ h2lcf->chunk_size = NGX_CONF_UNSET_SIZE; h2lcf->push_preload = NGX_CONF_UNSET; h2lcf->push = NGX_CONF_UNSET; return h2lcf; } static char * ngx_http_v2_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) { ngx_http_v2_loc_conf_t *prev = parent; ngx_http_v2_loc_conf_t *conf = child; ngx_conf_merge_size_value(conf->chunk_size, prev->chunk_size, 8 * 1024); ngx_conf_merge_value(conf->push, prev->push, 1); if (conf->push && conf->pushes == NULL) { conf->pushes = prev->pushes; } ngx_conf_merge_value(conf->push_preload, prev->push_preload, 0); return NGX_CONF_OK; } static char * ngx_http_v2_push(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_v2_loc_conf_t *h2lcf = conf; ngx_str_t *value; ngx_http_complex_value_t *cv; ngx_http_compile_complex_value_t ccv; value = cf->args->elts; if (ngx_strcmp(value[1].data, "off") == 0) { if (h2lcf->pushes) { return "\"off\" parameter cannot be used with URI"; } if (h2lcf->push == 0) { return "is duplicate"; } h2lcf->push = 0; return NGX_CONF_OK; } if (h2lcf->push == 0) { return "URI cannot be used with \"off\" parameter"; } h2lcf->push = 1; if (h2lcf->pushes == NULL) { h2lcf->pushes = ngx_array_create(cf->pool, 1, sizeof(ngx_http_complex_value_t)); if (h2lcf->pushes == NULL) { return NGX_CONF_ERROR; } } cv = ngx_array_push(h2lcf->pushes); if (cv == NULL) { return NGX_CONF_ERROR; } ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); ccv.cf = cf; ccv.value = &value[1]; ccv.complex_value = cv; if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { return NGX_CONF_ERROR; } return NGX_CONF_OK; } static char * ngx_http_v2_recv_buffer_size(ngx_conf_t *cf, void *post, void *data) { size_t *sp = data; if (*sp <= 2 * NGX_HTTP_V2_STATE_BUFFER_SIZE) { return "value is too small"; } return NGX_CONF_OK; } static char * ngx_http_v2_pool_size(ngx_conf_t *cf, void *post, void *data) { size_t *sp = data; if (*sp < NGX_MIN_POOL_SIZE) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the pool size must be no less than %uz", NGX_MIN_POOL_SIZE); return NGX_CONF_ERROR; } if (*sp % NGX_POOL_ALIGNMENT) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the pool size must be a multiple of %uz", NGX_POOL_ALIGNMENT); return NGX_CONF_ERROR; } return NGX_CONF_OK; } static char * ngx_http_v2_preread_size(ngx_conf_t *cf, void *post, void *data) { size_t *sp = data; if (*sp > NGX_HTTP_V2_MAX_WINDOW) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the maximum body preread buffer size is %uz", NGX_HTTP_V2_MAX_WINDOW); return NGX_CONF_ERROR; } return NGX_CONF_OK; } static char * ngx_http_v2_streams_index_mask(ngx_conf_t *cf, void *post, void *data) { ngx_uint_t *np = data; ngx_uint_t mask; mask = *np - 1; if (*np == 0 || (*np & mask)) { return "must be a power of two"; } *np = mask; return NGX_CONF_OK; } static char * ngx_http_v2_chunk_size(ngx_conf_t *cf, void *post, void *data) { size_t *sp = data; if (*sp == 0) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "the http2 chunk size cannot be zero"); return NGX_CONF_ERROR; } if (*sp > NGX_HTTP_V2_MAX_FRAME_SIZE) { *sp = NGX_HTTP_V2_MAX_FRAME_SIZE; } return NGX_CONF_OK; } static char * ngx_http_v2_spdy_deprecated(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "invalid directive \"%V\": ngx_http_spdy_module " "was superseded by ngx_http_v2_module", &cmd->name); return NGX_CONF_OK; }