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nginx/src/stream/ngx_stream_quic_module.c
Roman Arutyunyan 6e6daf4592 QUIC: removed comment.
2020-11-11 19:40:41 +00:00

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/*
* Copyright (C) Nginx, Inc.
* Copyright (C) Roman Arutyunyan
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_stream.h>
static ngx_int_t ngx_stream_variable_quic(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_stream_quic_add_variables(ngx_conf_t *cf);
static void *ngx_stream_quic_create_srv_conf(ngx_conf_t *cf);
static char *ngx_stream_quic_merge_srv_conf(ngx_conf_t *cf, void *parent,
void *child);
static char *ngx_stream_quic_max_ack_delay(ngx_conf_t *cf, void *post,
void *data);
static char *ngx_stream_quic_max_udp_payload_size(ngx_conf_t *cf, void *post,
void *data);
static ngx_conf_post_t ngx_stream_quic_max_ack_delay_post =
{ ngx_stream_quic_max_ack_delay };
static ngx_conf_post_t ngx_stream_quic_max_udp_payload_size_post =
{ ngx_stream_quic_max_udp_payload_size };
static ngx_conf_num_bounds_t ngx_stream_quic_ack_delay_exponent_bounds =
{ ngx_conf_check_num_bounds, 0, 20 };
static ngx_conf_num_bounds_t
ngx_stream_quic_active_connection_id_limit_bounds =
{ ngx_conf_check_num_bounds, 2, -1 };
static ngx_command_t ngx_stream_quic_commands[] = {
{ ngx_string("quic_max_idle_timeout"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, tp.max_idle_timeout),
NULL },
{ ngx_string("quic_max_ack_delay"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, tp.max_ack_delay),
&ngx_stream_quic_max_ack_delay_post },
{ ngx_string("quic_max_udp_payload_size"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, tp.max_udp_payload_size),
&ngx_stream_quic_max_udp_payload_size_post },
{ ngx_string("quic_initial_max_data"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, tp.initial_max_data),
NULL },
{ ngx_string("quic_initial_max_stream_data_bidi_local"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_STREAM_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_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_STREAM_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_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, tp.initial_max_stream_data_uni),
NULL },
{ ngx_string("quic_initial_max_streams_bidi"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, tp.initial_max_streams_bidi),
NULL },
{ ngx_string("quic_initial_max_streams_uni"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, tp.initial_max_streams_uni),
NULL },
{ ngx_string("quic_ack_delay_exponent"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, tp.ack_delay_exponent),
&ngx_stream_quic_ack_delay_exponent_bounds },
{ ngx_string("quic_disable_active_migration"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, tp.disable_active_migration),
NULL },
{ ngx_string("quic_active_connection_id_limit"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, tp.active_connection_id_limit),
&ngx_stream_quic_active_connection_id_limit_bounds },
{ ngx_string("quic_retry"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, retry),
NULL },
{ ngx_string("quic_stateless_reset_token_key"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_quic_conf_t, sr_token_key),
NULL },
ngx_null_command
};
static ngx_stream_module_t ngx_stream_quic_module_ctx = {
ngx_stream_quic_add_variables, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
ngx_stream_quic_create_srv_conf, /* create server configuration */
ngx_stream_quic_merge_srv_conf, /* merge server configuration */
};
ngx_module_t ngx_stream_quic_module = {
NGX_MODULE_V1,
&ngx_stream_quic_module_ctx, /* module context */
ngx_stream_quic_commands, /* module directives */
NGX_STREAM_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_stream_variable_t ngx_stream_quic_vars[] = {
{ ngx_string("quic"), NULL, ngx_stream_variable_quic, 0, 0, 0 },
ngx_stream_null_variable
};
static ngx_int_t
ngx_stream_variable_quic(ngx_stream_session_t *s,
ngx_stream_variable_value_t *v, uintptr_t data)
{
if (s->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_stream_quic_add_variables(ngx_conf_t *cf)
{
ngx_stream_variable_t *var, *v;
for (v = ngx_stream_quic_vars; v->name.len; v++) {
var = ngx_stream_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_stream_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.preferred_address = NULL
* conf->sr_token_key = { 0, NULL }
* conf->require_alpn = 0;
*/
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;
return conf;
}
static char *
ngx_stream_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_stream_ssl_conf_t *scf;
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, 16);
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);
if (conf->retry) {
if (RAND_bytes(conf->token_key, sizeof(conf->token_key)) <= 0) {
return NGX_CONF_ERROR;
}
}
ngx_conf_merge_str_value(conf->sr_token_key, prev->sr_token_key, "");
scf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_ssl_module);
conf->ssl = &scf->ssl;
return NGX_CONF_OK;
}
static char *
ngx_stream_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_stream_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;
}
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