/*
* 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_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_obsolete(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_conf_deprecated_t ngx_http_v2_recv_timeout_deprecated = {
ngx_conf_deprecated, "http2_recv_timeout", "client_header_timeout"
};
static ngx_conf_deprecated_t ngx_http_v2_idle_timeout_deprecated = {
ngx_conf_deprecated, "http2_idle_timeout", "keepalive_timeout"
};
static ngx_conf_deprecated_t ngx_http_v2_max_requests_deprecated = {
ngx_conf_deprecated, "http2_max_requests", "keepalive_requests"
};
static ngx_conf_deprecated_t ngx_http_v2_max_field_size_deprecated = {
ngx_conf_deprecated, "http2_max_field_size", "large_client_header_buffers"
};
static ngx_conf_deprecated_t ngx_http_v2_max_header_size_deprecated = {
ngx_conf_deprecated, "http2_max_header_size", "large_client_header_buffers"
};
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"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_HTTP_SRV_CONF_OFFSET,
offsetof(ngx_http_v2_srv_conf_t, enable),
NULL },
{ 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_http_v2_obsolete,
0,
0,
NULL },
{ ngx_string("http2_max_requests"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_http_v2_obsolete,
0,
0,
&ngx_http_v2_max_requests_deprecated },
{ ngx_string("http2_max_field_size"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_http_v2_obsolete,
0,
0,
&ngx_http_v2_max_field_size_deprecated },
{ ngx_string("http2_max_header_size"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_http_v2_obsolete,
0,
0,
&ngx_http_v2_max_header_size_deprecated },
{ 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_http_v2_obsolete,
0,
0,
&ngx_http_v2_recv_timeout_deprecated },
{ ngx_string("http2_idle_timeout"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
ngx_http_v2_obsolete,
0,
0,
&ngx_http_v2_idle_timeout_deprecated },
{ 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_http_v2_obsolete,
0,
0,
NULL },
{ ngx_string("http2_push"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_http_v2_obsolete,
0,
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->enable = NGX_CONF_UNSET;
h2scf->pool_size = NGX_CONF_UNSET_SIZE;
h2scf->concurrent_streams = NGX_CONF_UNSET_UINT;
h2scf->preread_size = NGX_CONF_UNSET_SIZE;
h2scf->streams_index_mask = NGX_CONF_UNSET_UINT;
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_value(conf->enable, prev->enable, 0);
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_size_value(conf->preread_size, prev->preread_size, 65536);
ngx_conf_merge_uint_value(conf->streams_index_mask,
prev->streams_index_mask, 32 - 1);
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;
}
h2lcf->chunk_size = NGX_CONF_UNSET_SIZE;
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);
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 <= 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_obsolete(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_conf_deprecated_t *d = cmd->post;
if (d) {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"the \"%s\" directive is obsolete, "
"use the \"%s\" directive instead",
d->old_name, d->new_name);
} else {
ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
"the \"%V\" directive is obsolete, ignored",
&cmd->name);
}
return NGX_CONF_OK;
}
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