/*
* 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_v3_variable(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 char *ngx_http_quic_host_key(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_command_t ngx_http_v3_commands[] = {
{ ngx_string("http3"),
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, enable),
NULL },
{ ngx_string("http3_hq"),
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, enable_hq),
NULL },
{ ngx_string("http3_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_v3_srv_conf_t, max_concurrent_streams),
NULL },
{ ngx_string("http3_stream_buffer_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.stream_buffer_size),
NULL },
{ 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("quic_gso"),
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.gso_enabled),
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_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),
NULL },
ngx_null_command
};
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("http3"), NULL, ngx_http_v3_variable, 0, 0, 0 },
ngx_http_null_variable
};
static ngx_str_t ngx_http_quic_salt = ngx_string("ngx_quic");
static ngx_int_t
ngx_http_v3_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_http_v3_session_t *h3c;
if (r->connection->quic) {
h3c = ngx_http_v3_get_session(r->connection);
if (h3c->hq) {
v->len = sizeof("hq") - 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) "hq";
return NGX_OK;
}
v->len = sizeof("h3") - 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) "h3";
return NGX_OK;
}
*v = ngx_http_variable_null_value;
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 *h3scf;
h3scf = ngx_pcalloc(cf->pool, sizeof(ngx_http_v3_srv_conf_t));
if (h3scf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* h3scf->quic.host_key = { 0, NULL }
* h3scf->quic.stream_reject_code_uni = 0;
* h3scf->quic.disable_active_migration = 0;
* h3scf->quic.idle_timeout = 0;
* h3scf->max_blocked_streams = 0;
*/
h3scf->enable = NGX_CONF_UNSET;
h3scf->enable_hq = NGX_CONF_UNSET;
h3scf->max_table_capacity = NGX_HTTP_V3_MAX_TABLE_CAPACITY;
h3scf->max_concurrent_streams = NGX_CONF_UNSET_UINT;
h3scf->quic.stream_buffer_size = NGX_CONF_UNSET_SIZE;
h3scf->quic.max_concurrent_streams_bidi = NGX_CONF_UNSET_UINT;
h3scf->quic.max_concurrent_streams_uni = NGX_HTTP_V3_MAX_UNI_STREAMS;
h3scf->quic.retry = NGX_CONF_UNSET;
h3scf->quic.gso_enabled = NGX_CONF_UNSET;
h3scf->quic.stream_close_code = NGX_HTTP_V3_ERR_NO_ERROR;
h3scf->quic.stream_reject_code_bidi = NGX_HTTP_V3_ERR_REQUEST_REJECTED;
h3scf->quic.active_connection_id_limit = NGX_CONF_UNSET_UINT;
h3scf->quic.init = ngx_http_v3_init;
h3scf->quic.shutdown = ngx_http_v3_shutdown;
return h3scf;
}
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_http_ssl_srv_conf_t *sscf;
ngx_http_core_srv_conf_t *cscf;
ngx_conf_merge_value(conf->enable, prev->enable, 1);
ngx_conf_merge_value(conf->enable_hq, prev->enable_hq, 0);
ngx_conf_merge_uint_value(conf->max_concurrent_streams,
prev->max_concurrent_streams, 128);
conf->max_blocked_streams = conf->max_concurrent_streams;
ngx_conf_merge_size_value(conf->quic.stream_buffer_size,
prev->quic.stream_buffer_size,
65536);
conf->quic.max_concurrent_streams_bidi = conf->max_concurrent_streams;
ngx_conf_merge_value(conf->quic.retry, prev->quic.retry, 0);
ngx_conf_merge_value(conf->quic.gso_enabled, prev->quic.gso_enabled, 0);
ngx_conf_merge_str_value(conf->quic.host_key, prev->quic.host_key, "");
ngx_conf_merge_uint_value(conf->quic.active_connection_id_limit,
prev->quic.active_connection_id_limit,
2);
if (conf->quic.host_key.len == 0) {
conf->quic.host_key.len = NGX_QUIC_DEFAULT_HOST_KEY_LEN;
conf->quic.host_key.data = ngx_palloc(cf->pool,
conf->quic.host_key.len);
if (conf->quic.host_key.data == NULL) {
return NGX_CONF_ERROR;
}
if (RAND_bytes(conf->quic.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->quic.host_key, &ngx_http_quic_salt,
conf->quic.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->quic.host_key, &ngx_http_quic_salt,
conf->quic.sr_token_key, NGX_QUIC_SR_KEY_LEN)
!= NGX_OK)
{
return NGX_CONF_ERROR;
}
cscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_core_module);
conf->quic.handshake_timeout = cscf->client_header_timeout;
sscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_ssl_module);
conf->quic.ssl = &sscf->ssl;
return NGX_CONF_OK;
}
static char *
ngx_http_quic_host_key(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_v3_srv_conf_t *h3scf = conf;
u_char *buf;
size_t size;
ssize_t n;
ngx_str_t *value;
ngx_file_t file;
ngx_file_info_t fi;
ngx_quic_conf_t *qcf;
qcf = &h3scf->quic;
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;
}
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