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Stream: ngx_stream_pass_module.

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The module allows to pass connections from Stream to other modules such as HTTP
or Mail, as well as back to Stream.  Previously, this was only possible with
proxying.  Connections with preread buffer read out from socket cannot be
passed.

The module allows selective SSL termination based on SNI.

    stream {
        server {
            listen 8000 default_server;
            ssl_preread on;
            ...
        }

        server {
            listen 8000;
            server_name foo.example.com;
            pass 127.0.0.1:8001; # to HTTP
        }

        server {
            listen 8000;
            server_name bar.example.com;
            ...
        }
    }

    http {
        server {
            listen 8001 ssl;
            ...

            location / {
                root html;
            }
        }
    }
This commit is contained in:
Roman Arutyunyan 2024-02-21 17:36:02 +04:00
parent d21675228a
commit a168b810e2
3 changed files with 289 additions and 0 deletions
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10
auto/modules
View File

@ -1166,6 +1166,16 @@ if [ $STREAM != NO ]; then
. auto/module
fi
if [ $STREAM_PASS = YES ]; then
ngx_module_name=ngx_stream_pass_module
ngx_module_deps=
ngx_module_srcs=src/stream/ngx_stream_pass_module.c
ngx_module_libs=
ngx_module_link=$STREAM_PASS
. auto/module
fi
if [ $STREAM_SET = YES ]; then
ngx_module_name=ngx_stream_set_module
ngx_module_deps=

3
auto/options
View File

@ -127,6 +127,7 @@ STREAM_GEOIP=NO
STREAM_MAP=YES
STREAM_SPLIT_CLIENTS=YES
STREAM_RETURN=YES
STREAM_PASS=YES
STREAM_SET=YES
STREAM_UPSTREAM_HASH=YES
STREAM_UPSTREAM_LEAST_CONN=YES
@ -337,6 +338,7 @@ use the \"--with-mail_ssl_module\" option instead"
--without-stream_split_clients_module)
STREAM_SPLIT_CLIENTS=NO ;;
--without-stream_return_module) STREAM_RETURN=NO ;;
--without-stream_pass_module) STREAM_PASS=NO ;;
--without-stream_set_module) STREAM_SET=NO ;;
--without-stream_upstream_hash_module)
STREAM_UPSTREAM_HASH=NO ;;
@ -556,6 +558,7 @@ cat << END
--without-stream_split_clients_module
disable ngx_stream_split_clients_module
--without-stream_return_module disable ngx_stream_return_module
--without-stream_pass_module disable ngx_stream_pass_module
--without-stream_set_module disable ngx_stream_set_module
--without-stream_upstream_hash_module
disable ngx_stream_upstream_hash_module

276
src/stream/ngx_stream_pass_module.c Normal file
View File

@ -0,0 +1,276 @@
/*
* Copyright (C) Roman Arutyunyan
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_stream.h>
typedef struct {
ngx_addr_t *addr;
ngx_stream_complex_value_t *addr_value;
} ngx_stream_pass_srv_conf_t;
static void ngx_stream_pass_handler(ngx_stream_session_t *s);
static ngx_int_t ngx_stream_pass_match(ngx_listening_t *ls, ngx_addr_t *addr);
static void *ngx_stream_pass_create_srv_conf(ngx_conf_t *cf);
static char *ngx_stream_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static ngx_command_t ngx_stream_pass_commands[] = {
{ ngx_string("pass"),
NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_pass,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
static ngx_stream_module_t ngx_stream_pass_module_ctx = {
NULL, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
ngx_stream_pass_create_srv_conf, /* create server configuration */
NULL /* merge server configuration */
};
ngx_module_t ngx_stream_pass_module = {
NGX_MODULE_V1,
&ngx_stream_pass_module_ctx, /* module context */
ngx_stream_pass_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 void
ngx_stream_pass_handler(ngx_stream_session_t *s)
{
ngx_url_t u;
ngx_str_t url;
ngx_addr_t *addr;
ngx_uint_t i;
ngx_listening_t *ls;
ngx_connection_t *c;
ngx_stream_pass_srv_conf_t *pscf;
c = s->connection;
c->log->action = "passing connection to port";
if (c->buffer && c->buffer->pos != c->buffer->last) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"cannot pass connection with preread data");
goto failed;
}
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_pass_module);
addr = pscf->addr;
if (addr == NULL) {
if (ngx_stream_complex_value(s, pscf->addr_value, &url) != NGX_OK) {
goto failed;
}
ngx_memzero(&u, sizeof(ngx_url_t));
u.url = url;
u.no_resolve = 1;
if (ngx_parse_url(c->pool, &u) != NGX_OK) {
if (u.err) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"%s in pass \"%V\"", u.err, &u.url);
}
goto failed;
}
if (u.naddrs == 0) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"no addresses in pass \"%V\"", &u.url);
goto failed;
}
if (u.no_port) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"no port in pass \"%V\"", &u.url);
goto failed;
}
addr = &u.addrs[0];
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
"stream pass addr: \"%V\"", &addr->name);
ls = ngx_cycle->listening.elts;
for (i = 0; i < ngx_cycle->listening.nelts; i++) {
if (ngx_stream_pass_match(&ls[i], addr) != NGX_OK) {
continue;
}
c->listening = &ls[i];
c->data = NULL;
c->buffer = NULL;
*c->log = c->listening->log;
c->log->handler = NULL;
c->log->data = NULL;
c->local_sockaddr = addr->sockaddr;
c->local_socklen = addr->socklen;
c->listening->handler(c);
return;
}
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"port not found for \"%V\"", &addr->name);
ngx_stream_finalize_session(s, NGX_STREAM_OK);
return;
failed:
ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
}
static ngx_int_t
ngx_stream_pass_match(ngx_listening_t *ls, ngx_addr_t *addr)
{
if (!ls->wildcard) {
return ngx_cmp_sockaddr(ls->sockaddr, ls->socklen,
addr->sockaddr, addr->socklen, 1);
}
if (ls->sockaddr->sa_family == addr->sockaddr->sa_family
&& ngx_inet_get_port(ls->sockaddr) == ngx_inet_get_port(addr->sockaddr))
{
return NGX_OK;
}
return NGX_DECLINED;
}
static void *
ngx_stream_pass_create_srv_conf(ngx_conf_t *cf)
{
ngx_stream_pass_srv_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_pass_srv_conf_t));
if (conf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* conf->addr = NULL;
* conf->addr_value = NULL;
*/
return conf;
}
static char *
ngx_stream_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_stream_pass_srv_conf_t *pscf = conf;
ngx_url_t u;
ngx_str_t *value, *url;
ngx_stream_complex_value_t cv;
ngx_stream_core_srv_conf_t *cscf;
ngx_stream_compile_complex_value_t ccv;
if (pscf->addr || pscf->addr_value) {
return "is duplicate";
}
cscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_core_module);
cscf->handler = ngx_stream_pass_handler;
value = cf->args->elts;
url = &value[1];
ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t));
ccv.cf = cf;
ccv.value = url;
ccv.complex_value = &cv;
if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) {
return NGX_CONF_ERROR;
}
if (cv.lengths) {
pscf->addr_value = ngx_palloc(cf->pool,
sizeof(ngx_stream_complex_value_t));
if (pscf->addr_value == NULL) {
return NGX_CONF_ERROR;
}
*pscf->addr_value = cv;
return NGX_CONF_OK;
}
ngx_memzero(&u, sizeof(ngx_url_t));
u.url = *url;
u.no_resolve = 1;
if (ngx_parse_url(cf->pool, &u) != NGX_OK) {
if (u.err) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"%s in \"%V\" of the \"pass\" directive",
u.err, &u.url);
}
return NGX_CONF_ERROR;
}
if (u.naddrs == 0) {
return "has no addresses";
}
if (u.no_port) {
return "has no port";
}
pscf->addr = &u.addrs[0];
return NGX_CONF_OK;
}