/*
* 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 *value;
#if (NGX_HAVE_TRANSPARENT_PROXY)
ngx_uint_t transparent; /* unsigned transparent:1; */
#endif
} ngx_stream_upstream_local_t;
typedef struct {
ngx_msec_t connect_timeout;
ngx_msec_t timeout;
ngx_msec_t next_upstream_timeout;
size_t buffer_size;
ngx_stream_complex_value_t *upload_rate;
ngx_stream_complex_value_t *download_rate;
ngx_uint_t requests;
ngx_uint_t responses;
ngx_uint_t next_upstream_tries;
ngx_flag_t next_upstream;
ngx_flag_t proxy_protocol;
ngx_flag_t half_close;
ngx_stream_upstream_local_t *local;
ngx_flag_t socket_keepalive;
#if (NGX_STREAM_SSL)
ngx_flag_t ssl_enable;
ngx_flag_t ssl_session_reuse;
ngx_uint_t ssl_protocols;
ngx_str_t ssl_ciphers;
ngx_stream_complex_value_t *ssl_name;
ngx_flag_t ssl_server_name;
ngx_flag_t ssl_verify;
ngx_uint_t ssl_verify_depth;
ngx_str_t ssl_trusted_certificate;
ngx_str_t ssl_crl;
ngx_stream_complex_value_t *ssl_certificate;
ngx_stream_complex_value_t *ssl_certificate_key;
ngx_array_t *ssl_passwords;
ngx_array_t *ssl_conf_commands;
ngx_ssl_t *ssl;
#endif
ngx_stream_upstream_srv_conf_t *upstream;
ngx_stream_complex_value_t *upstream_value;
} ngx_stream_proxy_srv_conf_t;
static void ngx_stream_proxy_handler(ngx_stream_session_t *s);
static ngx_int_t ngx_stream_proxy_eval(ngx_stream_session_t *s,
ngx_stream_proxy_srv_conf_t *pscf);
static ngx_int_t ngx_stream_proxy_set_local(ngx_stream_session_t *s,
ngx_stream_upstream_t *u, ngx_stream_upstream_local_t *local);
static void ngx_stream_proxy_connect(ngx_stream_session_t *s);
static void ngx_stream_proxy_init_upstream(ngx_stream_session_t *s);
static void ngx_stream_proxy_resolve_handler(ngx_resolver_ctx_t *ctx);
static void ngx_stream_proxy_upstream_handler(ngx_event_t *ev);
static void ngx_stream_proxy_downstream_handler(ngx_event_t *ev);
static void ngx_stream_proxy_process_connection(ngx_event_t *ev,
ngx_uint_t from_upstream);
static void ngx_stream_proxy_connect_handler(ngx_event_t *ev);
static ngx_int_t ngx_stream_proxy_test_connect(ngx_connection_t *c);
static void ngx_stream_proxy_process(ngx_stream_session_t *s,
ngx_uint_t from_upstream, ngx_uint_t do_write);
static ngx_int_t ngx_stream_proxy_test_finalize(ngx_stream_session_t *s,
ngx_uint_t from_upstream);
static void ngx_stream_proxy_next_upstream(ngx_stream_session_t *s);
static void ngx_stream_proxy_finalize(ngx_stream_session_t *s, ngx_uint_t rc);
static u_char *ngx_stream_proxy_log_error(ngx_log_t *log, u_char *buf,
size_t len);
static void *ngx_stream_proxy_create_srv_conf(ngx_conf_t *cf);
static char *ngx_stream_proxy_merge_srv_conf(ngx_conf_t *cf, void *parent,
void *child);
static char *ngx_stream_proxy_pass(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_stream_proxy_bind(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
#if (NGX_STREAM_SSL)
static ngx_int_t ngx_stream_proxy_send_proxy_protocol(ngx_stream_session_t *s);
static char *ngx_stream_proxy_ssl_password_file(ngx_conf_t *cf,
ngx_command_t *cmd, void *conf);
static char *ngx_stream_proxy_ssl_conf_command_check(ngx_conf_t *cf, void *post,
void *data);
static void ngx_stream_proxy_ssl_init_connection(ngx_stream_session_t *s);
static void ngx_stream_proxy_ssl_handshake(ngx_connection_t *pc);
static void ngx_stream_proxy_ssl_save_session(ngx_connection_t *c);
static ngx_int_t ngx_stream_proxy_ssl_name(ngx_stream_session_t *s);
static ngx_int_t ngx_stream_proxy_ssl_certificate(ngx_stream_session_t *s);
static ngx_int_t ngx_stream_proxy_merge_ssl(ngx_conf_t *cf,
ngx_stream_proxy_srv_conf_t *conf, ngx_stream_proxy_srv_conf_t *prev);
static ngx_int_t ngx_stream_proxy_set_ssl(ngx_conf_t *cf,
ngx_stream_proxy_srv_conf_t *pscf);
static ngx_conf_bitmask_t ngx_stream_proxy_ssl_protocols[] = {
{ ngx_string("SSLv2"), NGX_SSL_SSLv2 },
{ ngx_string("SSLv3"), NGX_SSL_SSLv3 },
{ ngx_string("TLSv1"), NGX_SSL_TLSv1 },
{ ngx_string("TLSv1.1"), NGX_SSL_TLSv1_1 },
{ ngx_string("TLSv1.2"), NGX_SSL_TLSv1_2 },
{ ngx_string("TLSv1.3"), NGX_SSL_TLSv1_3 },
{ ngx_null_string, 0 }
};
static ngx_conf_post_t ngx_stream_proxy_ssl_conf_command_post =
{ ngx_stream_proxy_ssl_conf_command_check };
#endif
static ngx_conf_deprecated_t ngx_conf_deprecated_proxy_downstream_buffer = {
ngx_conf_deprecated, "proxy_downstream_buffer", "proxy_buffer_size"
};
static ngx_conf_deprecated_t ngx_conf_deprecated_proxy_upstream_buffer = {
ngx_conf_deprecated, "proxy_upstream_buffer", "proxy_buffer_size"
};
static ngx_command_t ngx_stream_proxy_commands[] = {
{ ngx_string("proxy_pass"),
NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_proxy_pass,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
{ ngx_string("proxy_bind"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE12,
ngx_stream_proxy_bind,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
{ ngx_string("proxy_socket_keepalive"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, socket_keepalive),
NULL },
{ ngx_string("proxy_connect_timeout"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, connect_timeout),
NULL },
{ ngx_string("proxy_timeout"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, timeout),
NULL },
{ ngx_string("proxy_buffer_size"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, buffer_size),
NULL },
{ ngx_string("proxy_downstream_buffer"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, buffer_size),
&ngx_conf_deprecated_proxy_downstream_buffer },
{ ngx_string("proxy_upstream_buffer"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, buffer_size),
&ngx_conf_deprecated_proxy_upstream_buffer },
{ ngx_string("proxy_upload_rate"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_set_complex_value_size_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, upload_rate),
NULL },
{ ngx_string("proxy_download_rate"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_set_complex_value_size_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, download_rate),
NULL },
{ ngx_string("proxy_requests"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, requests),
NULL },
{ ngx_string("proxy_responses"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, responses),
NULL },
{ ngx_string("proxy_next_upstream"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, next_upstream),
NULL },
{ ngx_string("proxy_next_upstream_tries"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, next_upstream_tries),
NULL },
{ ngx_string("proxy_next_upstream_timeout"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_msec_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, next_upstream_timeout),
NULL },
{ ngx_string("proxy_protocol"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, proxy_protocol),
NULL },
{ ngx_string("proxy_half_close"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, half_close),
NULL },
#if (NGX_STREAM_SSL)
{ ngx_string("proxy_ssl"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_enable),
NULL },
{ ngx_string("proxy_ssl_session_reuse"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_session_reuse),
NULL },
{ ngx_string("proxy_ssl_protocols"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_1MORE,
ngx_conf_set_bitmask_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_protocols),
&ngx_stream_proxy_ssl_protocols },
{ ngx_string("proxy_ssl_ciphers"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_ciphers),
NULL },
{ ngx_string("proxy_ssl_name"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_set_complex_value_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_name),
NULL },
{ ngx_string("proxy_ssl_server_name"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_server_name),
NULL },
{ ngx_string("proxy_ssl_verify"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_verify),
NULL },
{ ngx_string("proxy_ssl_verify_depth"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_verify_depth),
NULL },
{ ngx_string("proxy_ssl_trusted_certificate"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_trusted_certificate),
NULL },
{ ngx_string("proxy_ssl_crl"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_crl),
NULL },
{ ngx_string("proxy_ssl_certificate"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_set_complex_value_zero_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_certificate),
NULL },
{ ngx_string("proxy_ssl_certificate_key"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_set_complex_value_zero_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_certificate_key),
NULL },
{ ngx_string("proxy_ssl_password_file"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_proxy_ssl_password_file,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
{ ngx_string("proxy_ssl_conf_command"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE2,
ngx_conf_set_keyval_slot,
NGX_STREAM_SRV_CONF_OFFSET,
offsetof(ngx_stream_proxy_srv_conf_t, ssl_conf_commands),
&ngx_stream_proxy_ssl_conf_command_post },
#endif
ngx_null_command
};
static ngx_stream_module_t ngx_stream_proxy_module_ctx = {
NULL, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
ngx_stream_proxy_create_srv_conf, /* create server configuration */
ngx_stream_proxy_merge_srv_conf /* merge server configuration */
};
ngx_module_t ngx_stream_proxy_module = {
NGX_MODULE_V1,
&ngx_stream_proxy_module_ctx, /* module context */
ngx_stream_proxy_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_proxy_handler(ngx_stream_session_t *s)
{
u_char *p;
ngx_str_t *host;
ngx_uint_t i;
ngx_connection_t *c;
ngx_resolver_ctx_t *ctx, temp;
ngx_stream_upstream_t *u;
ngx_stream_core_srv_conf_t *cscf;
ngx_stream_proxy_srv_conf_t *pscf;
ngx_stream_upstream_srv_conf_t *uscf, **uscfp;
ngx_stream_upstream_main_conf_t *umcf;
c = s->connection;
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0,
"proxy connection handler");
u = ngx_pcalloc(c->pool, sizeof(ngx_stream_upstream_t));
if (u == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
s->upstream = u;
s->log_handler = ngx_stream_proxy_log_error;
u->requests = 1;
u->peer.log = c->log;
u->peer.log_error = NGX_ERROR_ERR;
if (ngx_stream_proxy_set_local(s, u, pscf->local) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
if (pscf->socket_keepalive) {
u->peer.so_keepalive = 1;
}
u->peer.type = c->type;
u->start_sec = ngx_time();
c->write->handler = ngx_stream_proxy_downstream_handler;
c->read->handler = ngx_stream_proxy_downstream_handler;
s->upstream_states = ngx_array_create(c->pool, 1,
sizeof(ngx_stream_upstream_state_t));
if (s->upstream_states == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
p = ngx_pnalloc(c->pool, pscf->buffer_size);
if (p == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
u->downstream_buf.start = p;
u->downstream_buf.end = p + pscf->buffer_size;
u->downstream_buf.pos = p;
u->downstream_buf.last = p;
if (c->read->ready) {
ngx_post_event(c->read, &ngx_posted_events);
}
if (pscf->upstream_value) {
if (ngx_stream_proxy_eval(s, pscf) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
}
if (u->resolved == NULL) {
uscf = pscf->upstream;
} else {
#if (NGX_STREAM_SSL)
u->ssl_name = u->resolved->host;
#endif
host = &u->resolved->host;
umcf = ngx_stream_get_module_main_conf(s, ngx_stream_upstream_module);
uscfp = umcf->upstreams.elts;
for (i = 0; i < umcf->upstreams.nelts; i++) {
uscf = uscfp[i];
if (uscf->host.len == host->len
&& ((uscf->port == 0 && u->resolved->no_port)
|| uscf->port == u->resolved->port)
&& ngx_strncasecmp(uscf->host.data, host->data, host->len) == 0)
{
goto found;
}
}
if (u->resolved->sockaddr) {
if (u->resolved->port == 0
&& u->resolved->sockaddr->sa_family != AF_UNIX)
{
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"no port in upstream \"%V\"", host);
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
if (ngx_stream_upstream_create_round_robin_peer(s, u->resolved)
!= NGX_OK)
{
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
ngx_stream_proxy_connect(s);
return;
}
if (u->resolved->port == 0) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"no port in upstream \"%V\"", host);
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
temp.name = *host;
cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module);
ctx = ngx_resolve_start(cscf->resolver, &temp);
if (ctx == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
if (ctx == NGX_NO_RESOLVER) {
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"no resolver defined to resolve %V", host);
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
ctx->name = *host;
ctx->handler = ngx_stream_proxy_resolve_handler;
ctx->data = s;
ctx->timeout = cscf->resolver_timeout;
u->resolved->ctx = ctx;
if (ngx_resolve_name(ctx) != NGX_OK) {
u->resolved->ctx = NULL;
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
return;
}
found:
if (uscf == NULL) {
ngx_log_error(NGX_LOG_ALERT, c->log, 0, "no upstream configuration");
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
u->upstream = uscf;
#if (NGX_STREAM_SSL)
u->ssl_name = uscf->host;
#endif
if (uscf->peer.init(s, uscf) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
u->peer.start_time = ngx_current_msec;
if (pscf->next_upstream_tries
&& u->peer.tries > pscf->next_upstream_tries)
{
u->peer.tries = pscf->next_upstream_tries;
}
ngx_stream_proxy_connect(s);
}
static ngx_int_t
ngx_stream_proxy_eval(ngx_stream_session_t *s,
ngx_stream_proxy_srv_conf_t *pscf)
{
ngx_str_t host;
ngx_url_t url;
ngx_stream_upstream_t *u;
if (ngx_stream_complex_value(s, pscf->upstream_value, &host) != NGX_OK) {
return NGX_ERROR;
}
ngx_memzero(&url, sizeof(ngx_url_t));
url.url = host;
url.no_resolve = 1;
if (ngx_parse_url(s->connection->pool, &url) != NGX_OK) {
if (url.err) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"%s in upstream \"%V\"", url.err, &url.url);
}
return NGX_ERROR;
}
u = s->upstream;
u->resolved = ngx_pcalloc(s->connection->pool,
sizeof(ngx_stream_upstream_resolved_t));
if (u->resolved == NULL) {
return NGX_ERROR;
}
if (url.addrs) {
u->resolved->sockaddr = url.addrs[0].sockaddr;
u->resolved->socklen = url.addrs[0].socklen;
u->resolved->name = url.addrs[0].name;
u->resolved->naddrs = 1;
}
u->resolved->host = url.host;
u->resolved->port = url.port;
u->resolved->no_port = url.no_port;
return NGX_OK;
}
static ngx_int_t
ngx_stream_proxy_set_local(ngx_stream_session_t *s, ngx_stream_upstream_t *u,
ngx_stream_upstream_local_t *local)
{
ngx_int_t rc;
ngx_str_t val;
ngx_addr_t *addr;
if (local == NULL) {
u->peer.local = NULL;
return NGX_OK;
}
#if (NGX_HAVE_TRANSPARENT_PROXY)
u->peer.transparent = local->transparent;
#endif
if (local->value == NULL) {
u->peer.local = local->addr;
return NGX_OK;
}
if (ngx_stream_complex_value(s, local->value, &val) != NGX_OK) {
return NGX_ERROR;
}
if (val.len == 0) {
return NGX_OK;
}
addr = ngx_palloc(s->connection->pool, sizeof(ngx_addr_t));
if (addr == NULL) {
return NGX_ERROR;
}
rc = ngx_parse_addr_port(s->connection->pool, addr, val.data, val.len);
if (rc == NGX_ERROR) {
return NGX_ERROR;
}
if (rc != NGX_OK) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"invalid local address \"%V\"", &val);
return NGX_OK;
}
addr->name = val;
u->peer.local = addr;
return NGX_OK;
}
static void
ngx_stream_proxy_connect(ngx_stream_session_t *s)
{
ngx_int_t rc;
ngx_connection_t *c, *pc;
ngx_stream_upstream_t *u;
ngx_stream_proxy_srv_conf_t *pscf;
c = s->connection;
c->log->action = "connecting to upstream";
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
u = s->upstream;
u->connected = 0;
u->proxy_protocol = pscf->proxy_protocol;
if (u->state) {
u->state->response_time = ngx_current_msec - u->start_time;
}
u->state = ngx_array_push(s->upstream_states);
if (u->state == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
ngx_memzero(u->state, sizeof(ngx_stream_upstream_state_t));
u->start_time = ngx_current_msec;
u->state->connect_time = (ngx_msec_t) -1;
u->state->first_byte_time = (ngx_msec_t) -1;
u->state->response_time = (ngx_msec_t) -1;
rc = ngx_event_connect_peer(&u->peer);
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, "proxy connect: %i", rc);
if (rc == NGX_ERROR) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
u->state->peer = u->peer.name;
if (rc == NGX_BUSY) {
ngx_log_error(NGX_LOG_ERR, c->log, 0, "no live upstreams");
ngx_stream_proxy_finalize(s, NGX_STREAM_BAD_GATEWAY);
return;
}
if (rc == NGX_DECLINED) {
ngx_stream_proxy_next_upstream(s);
return;
}
/* rc == NGX_OK || rc == NGX_AGAIN || rc == NGX_DONE */
pc = u->peer.connection;
pc->data = s;
pc->log = c->log;
pc->pool = c->pool;
pc->read->log = c->log;
pc->write->log = c->log;
if (rc != NGX_AGAIN) {
ngx_stream_proxy_init_upstream(s);
return;
}
pc->read->handler = ngx_stream_proxy_connect_handler;
pc->write->handler = ngx_stream_proxy_connect_handler;
ngx_add_timer(pc->write, pscf->connect_timeout);
}
static void
ngx_stream_proxy_init_upstream(ngx_stream_session_t *s)
{
u_char *p;
ngx_chain_t *cl;
ngx_connection_t *c, *pc;
ngx_log_handler_pt handler;
ngx_stream_upstream_t *u;
ngx_stream_core_srv_conf_t *cscf;
ngx_stream_proxy_srv_conf_t *pscf;
u = s->upstream;
pc = u->peer.connection;
cscf = ngx_stream_get_module_srv_conf(s, ngx_stream_core_module);
if (pc->type == SOCK_STREAM
&& cscf->tcp_nodelay
&& ngx_tcp_nodelay(pc) != NGX_OK)
{
ngx_stream_proxy_next_upstream(s);
return;
}
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
#if (NGX_STREAM_SSL)
if (pc->type == SOCK_STREAM && pscf->ssl_enable) {
if (u->proxy_protocol) {
if (ngx_stream_proxy_send_proxy_protocol(s) != NGX_OK) {
return;
}
u->proxy_protocol = 0;
}
if (pc->ssl == NULL) {
ngx_stream_proxy_ssl_init_connection(s);
return;
}
}
#endif
c = s->connection;
if (c->log->log_level >= NGX_LOG_INFO) {
ngx_str_t str;
u_char addr[NGX_SOCKADDR_STRLEN];
str.len = NGX_SOCKADDR_STRLEN;
str.data = addr;
if (ngx_connection_local_sockaddr(pc, &str, 1) == NGX_OK) {
handler = c->log->handler;
c->log->handler = NULL;
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"%sproxy %V connected to %V",
pc->type == SOCK_DGRAM ? "udp " : "",
&str, u->peer.name);
c->log->handler = handler;
}
}
u->state->connect_time = ngx_current_msec - u->start_time;
if (u->peer.notify) {
u->peer.notify(&u->peer, u->peer.data,
NGX_STREAM_UPSTREAM_NOTIFY_CONNECT);
}
if (u->upstream_buf.start == NULL) {
p = ngx_pnalloc(c->pool, pscf->buffer_size);
if (p == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
u->upstream_buf.start = p;
u->upstream_buf.end = p + pscf->buffer_size;
u->upstream_buf.pos = p;
u->upstream_buf.last = p;
}
if (c->buffer && c->buffer->pos <= c->buffer->last) {
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
"stream proxy add preread buffer: %uz",
c->buffer->last - c->buffer->pos);
cl = ngx_chain_get_free_buf(c->pool, &u->free);
if (cl == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
*cl->buf = *c->buffer;
cl->buf->tag = (ngx_buf_tag_t) &ngx_stream_proxy_module;
cl->buf->temporary = (cl->buf->pos == cl->buf->last) ? 0 : 1;
cl->buf->flush = 1;
cl->next = u->upstream_out;
u->upstream_out = cl;
}
if (u->proxy_protocol) {
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0,
"stream proxy add PROXY protocol header");
cl = ngx_chain_get_free_buf(c->pool, &u->free);
if (cl == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
p = ngx_pnalloc(c->pool, NGX_PROXY_PROTOCOL_V1_MAX_HEADER);
if (p == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
cl->buf->pos = p;
p = ngx_proxy_protocol_write(c, p,
p + NGX_PROXY_PROTOCOL_V1_MAX_HEADER);
if (p == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
cl->buf->last = p;
cl->buf->temporary = 1;
cl->buf->flush = 0;
cl->buf->last_buf = 0;
cl->buf->tag = (ngx_buf_tag_t) &ngx_stream_proxy_module;
cl->next = u->upstream_out;
u->upstream_out = cl;
u->proxy_protocol = 0;
}
u->upload_rate = ngx_stream_complex_value_size(s, pscf->upload_rate, 0);
u->download_rate = ngx_stream_complex_value_size(s, pscf->download_rate, 0);
u->connected = 1;
pc->read->handler = ngx_stream_proxy_upstream_handler;
pc->write->handler = ngx_stream_proxy_upstream_handler;
if (pc->read->ready) {
ngx_post_event(pc->read, &ngx_posted_events);
}
ngx_stream_proxy_process(s, 0, 1);
}
#if (NGX_STREAM_SSL)
static ngx_int_t
ngx_stream_proxy_send_proxy_protocol(ngx_stream_session_t *s)
{
u_char *p;
ssize_t n, size;
ngx_connection_t *c, *pc;
ngx_stream_upstream_t *u;
ngx_stream_proxy_srv_conf_t *pscf;
u_char buf[NGX_PROXY_PROTOCOL_V1_MAX_HEADER];
c = s->connection;
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0,
"stream proxy send PROXY protocol header");
p = ngx_proxy_protocol_write(c, buf,
buf + NGX_PROXY_PROTOCOL_V1_MAX_HEADER);
if (p == NULL) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return NGX_ERROR;
}
u = s->upstream;
pc = u->peer.connection;
size = p - buf;
n = pc->send(pc, buf, size);
if (n == NGX_AGAIN) {
if (ngx_handle_write_event(pc->write, 0) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return NGX_ERROR;
}
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
ngx_add_timer(pc->write, pscf->timeout);
pc->write->handler = ngx_stream_proxy_connect_handler;
return NGX_AGAIN;
}
if (n == NGX_ERROR) {
ngx_stream_proxy_finalize(s, NGX_STREAM_OK);
return NGX_ERROR;
}
if (n != size) {
/*
* PROXY protocol specification:
* The sender must always ensure that the header
* is sent at once, so that the transport layer
* maintains atomicity along the path to the receiver.
*/
ngx_log_error(NGX_LOG_ERR, c->log, 0,
"could not send PROXY protocol header at once");
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return NGX_ERROR;
}
return NGX_OK;
}
static char *
ngx_stream_proxy_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf)
{
ngx_stream_proxy_srv_conf_t *pscf = conf;
ngx_str_t *value;
if (pscf->ssl_passwords != NGX_CONF_UNSET_PTR) {
return "is duplicate";
}
value = cf->args->elts;
pscf->ssl_passwords = ngx_ssl_read_password_file(cf, &value[1]);
if (pscf->ssl_passwords == NULL) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static char *
ngx_stream_proxy_ssl_conf_command_check(ngx_conf_t *cf, void *post, void *data)
{
#ifndef SSL_CONF_FLAG_FILE
return "is not supported on this platform";
#else
return NGX_CONF_OK;
#endif
}
static void
ngx_stream_proxy_ssl_init_connection(ngx_stream_session_t *s)
{
ngx_int_t rc;
ngx_connection_t *pc;
ngx_stream_upstream_t *u;
ngx_stream_proxy_srv_conf_t *pscf;
u = s->upstream;
pc = u->peer.connection;
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
if (ngx_ssl_create_connection(pscf->ssl, pc, NGX_SSL_BUFFER|NGX_SSL_CLIENT)
!= NGX_OK)
{
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
if (pscf->ssl_server_name || pscf->ssl_verify) {
if (ngx_stream_proxy_ssl_name(s) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
}
if (pscf->ssl_certificate
&& pscf->ssl_certificate->value.len
&& (pscf->ssl_certificate->lengths
|| pscf->ssl_certificate_key->lengths))
{
if (ngx_stream_proxy_ssl_certificate(s) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
}
if (pscf->ssl_session_reuse) {
pc->ssl->save_session = ngx_stream_proxy_ssl_save_session;
if (u->peer.set_session(&u->peer, u->peer.data) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
}
s->connection->log->action = "SSL handshaking to upstream";
rc = ngx_ssl_handshake(pc);
if (rc == NGX_AGAIN) {
if (!pc->write->timer_set) {
ngx_add_timer(pc->write, pscf->connect_timeout);
}
pc->ssl->handler = ngx_stream_proxy_ssl_handshake;
return;
}
ngx_stream_proxy_ssl_handshake(pc);
}
static void
ngx_stream_proxy_ssl_handshake(ngx_connection_t *pc)
{
long rc;
ngx_stream_session_t *s;
ngx_stream_upstream_t *u;
ngx_stream_proxy_srv_conf_t *pscf;
s = pc->data;
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
if (pc->ssl->handshaked) {
if (pscf->ssl_verify) {
rc = SSL_get_verify_result(pc->ssl->connection);
if (rc != X509_V_OK) {
ngx_log_error(NGX_LOG_ERR, pc->log, 0,
"upstream SSL certificate verify error: (%l:%s)",
rc, X509_verify_cert_error_string(rc));
goto failed;
}
u = s->upstream;
if (ngx_ssl_check_host(pc, &u->ssl_name) != NGX_OK) {
ngx_log_error(NGX_LOG_ERR, pc->log, 0,
"upstream SSL certificate does not match \"%V\"",
&u->ssl_name);
goto failed;
}
}
if (pc->write->timer_set) {
ngx_del_timer(pc->write);
}
ngx_stream_proxy_init_upstream(s);
return;
}
failed:
ngx_stream_proxy_next_upstream(s);
}
static void
ngx_stream_proxy_ssl_save_session(ngx_connection_t *c)
{
ngx_stream_session_t *s;
ngx_stream_upstream_t *u;
s = c->data;
u = s->upstream;
u->peer.save_session(&u->peer, u->peer.data);
}
static ngx_int_t
ngx_stream_proxy_ssl_name(ngx_stream_session_t *s)
{
u_char *p, *last;
ngx_str_t name;
ngx_stream_upstream_t *u;
ngx_stream_proxy_srv_conf_t *pscf;
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
u = s->upstream;
if (pscf->ssl_name) {
if (ngx_stream_complex_value(s, pscf->ssl_name, &name) != NGX_OK) {
return NGX_ERROR;
}
} else {
name = u->ssl_name;
}
if (name.len == 0) {
goto done;
}
/*
* ssl name here may contain port, strip it for compatibility
* with the http module
*/
p = name.data;
last = name.data + name.len;
if (*p == '[') {
p = ngx_strlchr(p, last, ']');
if (p == NULL) {
p = name.data;
}
}
p = ngx_strlchr(p, last, ':');
if (p != NULL) {
name.len = p - name.data;
}
if (!pscf->ssl_server_name) {
goto done;
}
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
/* as per RFC 6066, literal IPv4 and IPv6 addresses are not permitted */
if (name.len == 0 || *name.data == '[') {
goto done;
}
if (ngx_inet_addr(name.data, name.len) != INADDR_NONE) {
goto done;
}
/*
* SSL_set_tlsext_host_name() needs a null-terminated string,
* hence we explicitly null-terminate name here
*/
p = ngx_pnalloc(s->connection->pool, name.len + 1);
if (p == NULL) {
return NGX_ERROR;
}
(void) ngx_cpystrn(p, name.data, name.len + 1);
name.data = p;
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"upstream SSL server name: \"%s\"", name.data);
if (SSL_set_tlsext_host_name(u->peer.connection->ssl->connection,
(char *) name.data)
== 0)
{
ngx_ssl_error(NGX_LOG_ERR, s->connection->log, 0,
"SSL_set_tlsext_host_name(\"%s\") failed", name.data);
return NGX_ERROR;
}
#endif
done:
u->ssl_name = name;
return NGX_OK;
}
static ngx_int_t
ngx_stream_proxy_ssl_certificate(ngx_stream_session_t *s)
{
ngx_str_t cert, key;
ngx_connection_t *c;
ngx_stream_proxy_srv_conf_t *pscf;
c = s->upstream->peer.connection;
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
if (ngx_stream_complex_value(s, pscf->ssl_certificate, &cert)
!= NGX_OK)
{
return NGX_ERROR;
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
"stream upstream ssl cert: \"%s\"", cert.data);
if (*cert.data == '\0') {
return NGX_OK;
}
if (ngx_stream_complex_value(s, pscf->ssl_certificate_key, &key)
!= NGX_OK)
{
return NGX_ERROR;
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
"stream upstream ssl key: \"%s\"", key.data);
if (ngx_ssl_connection_certificate(c, c->pool, &cert, &key,
pscf->ssl_passwords)
!= NGX_OK)
{
return NGX_ERROR;
}
return NGX_OK;
}
#endif
static void
ngx_stream_proxy_downstream_handler(ngx_event_t *ev)
{
ngx_stream_proxy_process_connection(ev, ev->write);
}
static void
ngx_stream_proxy_resolve_handler(ngx_resolver_ctx_t *ctx)
{
ngx_stream_session_t *s;
ngx_stream_upstream_t *u;
ngx_stream_proxy_srv_conf_t *pscf;
ngx_stream_upstream_resolved_t *ur;
s = ctx->data;
u = s->upstream;
ur = u->resolved;
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream upstream resolve");
if (ctx->state) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"%V could not be resolved (%i: %s)",
&ctx->name, ctx->state,
ngx_resolver_strerror(ctx->state));
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
ur->naddrs = ctx->naddrs;
ur->addrs = ctx->addrs;
#if (NGX_DEBUG)
{
u_char text[NGX_SOCKADDR_STRLEN];
ngx_str_t addr;
ngx_uint_t i;
addr.data = text;
for (i = 0; i < ctx->naddrs; i++) {
addr.len = ngx_sock_ntop(ur->addrs[i].sockaddr, ur->addrs[i].socklen,
text, NGX_SOCKADDR_STRLEN, 0);
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"name was resolved to %V", &addr);
}
}
#endif
if (ngx_stream_upstream_create_round_robin_peer(s, ur) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
ngx_resolve_name_done(ctx);
ur->ctx = NULL;
u->peer.start_time = ngx_current_msec;
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
if (pscf->next_upstream_tries
&& u->peer.tries > pscf->next_upstream_tries)
{
u->peer.tries = pscf->next_upstream_tries;
}
ngx_stream_proxy_connect(s);
}
static void
ngx_stream_proxy_upstream_handler(ngx_event_t *ev)
{
ngx_stream_proxy_process_connection(ev, !ev->write);
}
static void
ngx_stream_proxy_process_connection(ngx_event_t *ev, ngx_uint_t from_upstream)
{
ngx_connection_t *c, *pc;
ngx_log_handler_pt handler;
ngx_stream_session_t *s;
ngx_stream_upstream_t *u;
ngx_stream_proxy_srv_conf_t *pscf;
c = ev->data;
s = c->data;
u = s->upstream;
if (c->close) {
ngx_log_error(NGX_LOG_INFO, c->log, 0, "shutdown timeout");
ngx_stream_proxy_finalize(s, NGX_STREAM_OK);
return;
}
c = s->connection;
pc = u->peer.connection;
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
if (ev->timedout) {
ev->timedout = 0;
if (ev->delayed) {
ev->delayed = 0;
if (!ev->ready) {
if (ngx_handle_read_event(ev, 0) != NGX_OK) {
ngx_stream_proxy_finalize(s,
NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
if (u->connected && !c->read->delayed && !pc->read->delayed) {
ngx_add_timer(c->write, pscf->timeout);
}
return;
}
} else {
if (s->connection->type == SOCK_DGRAM) {
if (pscf->responses == NGX_MAX_INT32_VALUE
|| (u->responses >= pscf->responses * u->requests))
{
/*
* successfully terminate timed out UDP session
* if expected number of responses was received
*/
handler = c->log->handler;
c->log->handler = NULL;
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"udp timed out"
", packets from/to client:%ui/%ui"
", bytes from/to client:%O/%O"
", bytes from/to upstream:%O/%O",
u->requests, u->responses,
s->received, c->sent, u->received,
pc ? pc->sent : 0);
c->log->handler = handler;
ngx_stream_proxy_finalize(s, NGX_STREAM_OK);
return;
}
ngx_connection_error(pc, NGX_ETIMEDOUT, "upstream timed out");
pc->read->error = 1;
ngx_stream_proxy_finalize(s, NGX_STREAM_BAD_GATEWAY);
return;
}
ngx_connection_error(c, NGX_ETIMEDOUT, "connection timed out");
ngx_stream_proxy_finalize(s, NGX_STREAM_OK);
return;
}
} else if (ev->delayed) {
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0,
"stream connection delayed");
if (ngx_handle_read_event(ev, 0) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
}
return;
}
if (from_upstream && !u->connected) {
return;
}
ngx_stream_proxy_process(s, from_upstream, ev->write);
}
static void
ngx_stream_proxy_connect_handler(ngx_event_t *ev)
{
ngx_connection_t *c;
ngx_stream_session_t *s;
c = ev->data;
s = c->data;
if (ev->timedout) {
ngx_log_error(NGX_LOG_ERR, c->log, NGX_ETIMEDOUT, "upstream timed out");
ngx_stream_proxy_next_upstream(s);
return;
}
ngx_del_timer(c->write);
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0,
"stream proxy connect upstream");
if (ngx_stream_proxy_test_connect(c) != NGX_OK) {
ngx_stream_proxy_next_upstream(s);
return;
}
ngx_stream_proxy_init_upstream(s);
}
static ngx_int_t
ngx_stream_proxy_test_connect(ngx_connection_t *c)
{
int err;
socklen_t len;
#if (NGX_HAVE_KQUEUE)
if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
err = c->write->kq_errno ? c->write->kq_errno : c->read->kq_errno;
if (err) {
(void) ngx_connection_error(c, err,
"kevent() reported that connect() failed");
return NGX_ERROR;
}
} else
#endif
{
err = 0;
len = sizeof(int);
/*
* BSDs and Linux return 0 and set a pending error in err
* Solaris returns -1 and sets errno
*/
if (getsockopt(c->fd, SOL_SOCKET, SO_ERROR, (void *) &err, &len)
== -1)
{
err = ngx_socket_errno;
}
if (err) {
(void) ngx_connection_error(c, err, "connect() failed");
return NGX_ERROR;
}
}
return NGX_OK;
}
static void
ngx_stream_proxy_process(ngx_stream_session_t *s, ngx_uint_t from_upstream,
ngx_uint_t do_write)
{
char *recv_action, *send_action;
off_t *received, limit;
size_t size, limit_rate;
ssize_t n;
ngx_buf_t *b;
ngx_int_t rc;
ngx_uint_t flags, *packets;
ngx_msec_t delay;
ngx_chain_t *cl, **ll, **out, **busy;
ngx_connection_t *c, *pc, *src, *dst;
ngx_log_handler_pt handler;
ngx_stream_upstream_t *u;
ngx_stream_proxy_srv_conf_t *pscf;
u = s->upstream;
c = s->connection;
pc = u->connected ? u->peer.connection : NULL;
if (c->type == SOCK_DGRAM && (ngx_terminate || ngx_exiting)) {
/* socket is already closed on worker shutdown */
handler = c->log->handler;
c->log->handler = NULL;
ngx_log_error(NGX_LOG_INFO, c->log, 0, "disconnected on shutdown");
c->log->handler = handler;
ngx_stream_proxy_finalize(s, NGX_STREAM_OK);
return;
}
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
if (from_upstream) {
src = pc;
dst = c;
b = &u->upstream_buf;
limit_rate = u->download_rate;
received = &u->received;
packets = &u->responses;
out = &u->downstream_out;
busy = &u->downstream_busy;
recv_action = "proxying and reading from upstream";
send_action = "proxying and sending to client";
} else {
src = c;
dst = pc;
b = &u->downstream_buf;
limit_rate = u->upload_rate;
received = &s->received;
packets = &u->requests;
out = &u->upstream_out;
busy = &u->upstream_busy;
recv_action = "proxying and reading from client";
send_action = "proxying and sending to upstream";
}
for ( ;; ) {
if (do_write && dst) {
if (*out || *busy || dst->buffered) {
c->log->action = send_action;
rc = ngx_stream_top_filter(s, *out, from_upstream);
if (rc == NGX_ERROR) {
ngx_stream_proxy_finalize(s, NGX_STREAM_OK);
return;
}
ngx_chain_update_chains(c->pool, &u->free, busy, out,
(ngx_buf_tag_t) &ngx_stream_proxy_module);
if (*busy == NULL) {
b->pos = b->start;
b->last = b->start;
}
}
}
size = b->end - b->last;
if (size && src->read->ready && !src->read->delayed) {
if (limit_rate) {
limit = (off_t) limit_rate * (ngx_time() - u->start_sec + 1)
- *received;
if (limit <= 0) {
src->read->delayed = 1;
delay = (ngx_msec_t) (- limit * 1000 / limit_rate + 1);
ngx_add_timer(src->read, delay);
break;
}
if (c->type == SOCK_STREAM && (off_t) size > limit) {
size = (size_t) limit;
}
}
c->log->action = recv_action;
n = src->recv(src, b->last, size);
if (n == NGX_AGAIN) {
break;
}
if (n == NGX_ERROR) {
src->read->eof = 1;
n = 0;
}
if (n >= 0) {
if (limit_rate) {
delay = (ngx_msec_t) (n * 1000 / limit_rate);
if (delay > 0) {
src->read->delayed = 1;
ngx_add_timer(src->read, delay);
}
}
if (from_upstream) {
if (u->state->first_byte_time == (ngx_msec_t) -1) {
u->state->first_byte_time = ngx_current_msec
- u->start_time;
}
}
for (ll = out; *ll; ll = &(*ll)->next) { /* void */ }
cl = ngx_chain_get_free_buf(c->pool, &u->free);
if (cl == NULL) {
ngx_stream_proxy_finalize(s,
NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
*ll = cl;
cl->buf->pos = b->last;
cl->buf->last = b->last + n;
cl->buf->tag = (ngx_buf_tag_t) &ngx_stream_proxy_module;
cl->buf->temporary = (n ? 1 : 0);
cl->buf->last_buf = src->read->eof;
cl->buf->flush = !src->read->eof;
(*packets)++;
*received += n;
b->last += n;
do_write = 1;
continue;
}
}
break;
}
c->log->action = "proxying connection";
if (ngx_stream_proxy_test_finalize(s, from_upstream) == NGX_OK) {
return;
}
flags = src->read->eof ? NGX_CLOSE_EVENT : 0;
if (ngx_handle_read_event(src->read, flags) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
if (dst) {
if (dst->type == SOCK_STREAM && pscf->half_close
&& src->read->eof && !u->half_closed && !dst->buffered)
{
if (ngx_shutdown_socket(dst->fd, NGX_WRITE_SHUTDOWN) == -1) {
ngx_connection_error(c, ngx_socket_errno,
ngx_shutdown_socket_n " failed");
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
u->half_closed = 1;
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream proxy %s socket shutdown",
from_upstream ? "client" : "upstream");
}
if (ngx_handle_write_event(dst->write, 0) != NGX_OK) {
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
if (!c->read->delayed && !pc->read->delayed) {
ngx_add_timer(c->write, pscf->timeout);
} else if (c->write->timer_set) {
ngx_del_timer(c->write);
}
}
}
static ngx_int_t
ngx_stream_proxy_test_finalize(ngx_stream_session_t *s,
ngx_uint_t from_upstream)
{
ngx_connection_t *c, *pc;
ngx_log_handler_pt handler;
ngx_stream_upstream_t *u;
ngx_stream_proxy_srv_conf_t *pscf;
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
c = s->connection;
u = s->upstream;
pc = u->connected ? u->peer.connection : NULL;
if (c->type == SOCK_DGRAM) {
if (pscf->requests && u->requests < pscf->requests) {
return NGX_DECLINED;
}
if (pscf->requests) {
ngx_delete_udp_connection(c);
}
if (pscf->responses == NGX_MAX_INT32_VALUE
|| u->responses < pscf->responses * u->requests)
{
return NGX_DECLINED;
}
if (pc == NULL || c->buffered || pc->buffered) {
return NGX_DECLINED;
}
handler = c->log->handler;
c->log->handler = NULL;
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"udp done"
", packets from/to client:%ui/%ui"
", bytes from/to client:%O/%O"
", bytes from/to upstream:%O/%O",
u->requests, u->responses,
s->received, c->sent, u->received, pc ? pc->sent : 0);
c->log->handler = handler;
ngx_stream_proxy_finalize(s, NGX_STREAM_OK);
return NGX_OK;
}
/* c->type == SOCK_STREAM */
if (pc == NULL
|| (!c->read->eof && !pc->read->eof)
|| (!c->read->eof && c->buffered)
|| (!pc->read->eof && pc->buffered))
{
return NGX_DECLINED;
}
if (pscf->half_close) {
/* avoid closing live connections until both read ends get EOF */
if (!(c->read->eof && pc->read->eof && !c->buffered && !pc->buffered)) {
return NGX_DECLINED;
}
}
handler = c->log->handler;
c->log->handler = NULL;
ngx_log_error(NGX_LOG_INFO, c->log, 0,
"%s disconnected"
", bytes from/to client:%O/%O"
", bytes from/to upstream:%O/%O",
from_upstream ? "upstream" : "client",
s->received, c->sent, u->received, pc ? pc->sent : 0);
c->log->handler = handler;
ngx_stream_proxy_finalize(s, NGX_STREAM_OK);
return NGX_OK;
}
static void
ngx_stream_proxy_next_upstream(ngx_stream_session_t *s)
{
ngx_msec_t timeout;
ngx_connection_t *pc;
ngx_stream_upstream_t *u;
ngx_stream_proxy_srv_conf_t *pscf;
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"stream proxy next upstream");
u = s->upstream;
pc = u->peer.connection;
if (pc && pc->buffered) {
ngx_log_error(NGX_LOG_ERR, s->connection->log, 0,
"buffered data on next upstream");
ngx_stream_proxy_finalize(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
if (s->connection->type == SOCK_DGRAM) {
u->upstream_out = NULL;
}
if (u->peer.sockaddr) {
u->peer.free(&u->peer, u->peer.data, NGX_PEER_FAILED);
u->peer.sockaddr = NULL;
}
pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
timeout = pscf->next_upstream_timeout;
if (u->peer.tries == 0
|| !pscf->next_upstream
|| (timeout && ngx_current_msec - u->peer.start_time >= timeout))
{
ngx_stream_proxy_finalize(s, NGX_STREAM_BAD_GATEWAY);
return;
}
if (pc) {
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"close proxy upstream connection: %d", pc->fd);
#if (NGX_STREAM_SSL)
if (pc->ssl) {
pc->ssl->no_wait_shutdown = 1;
pc->ssl->no_send_shutdown = 1;
(void) ngx_ssl_shutdown(pc);
}
#endif
u->state->bytes_received = u->received;
u->state->bytes_sent = pc->sent;
ngx_close_connection(pc);
u->peer.connection = NULL;
}
ngx_stream_proxy_connect(s);
}
static void
ngx_stream_proxy_finalize(ngx_stream_session_t *s, ngx_uint_t rc)
{
ngx_uint_t state;
ngx_connection_t *pc;
ngx_stream_upstream_t *u;
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"finalize stream proxy: %i", rc);
u = s->upstream;
if (u == NULL) {
goto noupstream;
}
if (u->resolved && u->resolved->ctx) {
ngx_resolve_name_done(u->resolved->ctx);
u->resolved->ctx = NULL;
}
pc = u->peer.connection;
if (u->state) {
if (u->state->response_time == (ngx_msec_t) -1) {
u->state->response_time = ngx_current_msec - u->start_time;
}
if (pc) {
u->state->bytes_received = u->received;
u->state->bytes_sent = pc->sent;
}
}
if (u->peer.free && u->peer.sockaddr) {
state = 0;
if (pc && pc->type == SOCK_DGRAM
&& (pc->read->error || pc->write->error))
{
state = NGX_PEER_FAILED;
}
u->peer.free(&u->peer, u->peer.data, state);
u->peer.sockaddr = NULL;
}
if (pc) {
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, s->connection->log, 0,
"close stream proxy upstream connection: %d", pc->fd);
#if (NGX_STREAM_SSL)
if (pc->ssl) {
pc->ssl->no_wait_shutdown = 1;
(void) ngx_ssl_shutdown(pc);
}
#endif
ngx_close_connection(pc);
u->peer.connection = NULL;
}
noupstream:
ngx_stream_finalize_session(s, rc);
}
static u_char *
ngx_stream_proxy_log_error(ngx_log_t *log, u_char *buf, size_t len)
{
u_char *p;
ngx_connection_t *pc;
ngx_stream_session_t *s;
ngx_stream_upstream_t *u;
s = log->data;
u = s->upstream;
p = buf;
if (u->peer.name) {
p = ngx_snprintf(p, len, ", upstream: \"%V\"", u->peer.name);
len -= p - buf;
}
pc = u->peer.connection;
p = ngx_snprintf(p, len,
", bytes from/to client:%O/%O"
", bytes from/to upstream:%O/%O",
s->received, s->connection->sent,
u->received, pc ? pc->sent : 0);
return p;
}
static void *
ngx_stream_proxy_create_srv_conf(ngx_conf_t *cf)
{
ngx_stream_proxy_srv_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_proxy_srv_conf_t));
if (conf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* conf->ssl_protocols = 0;
* conf->ssl_ciphers = { 0, NULL };
* conf->ssl_trusted_certificate = { 0, NULL };
* conf->ssl_crl = { 0, NULL };
*
* conf->ssl = NULL;
* conf->upstream = NULL;
* conf->upstream_value = NULL;
*/
conf->connect_timeout = NGX_CONF_UNSET_MSEC;
conf->timeout = NGX_CONF_UNSET_MSEC;
conf->next_upstream_timeout = NGX_CONF_UNSET_MSEC;
conf->buffer_size = NGX_CONF_UNSET_SIZE;
conf->upload_rate = NGX_CONF_UNSET_PTR;
conf->download_rate = NGX_CONF_UNSET_PTR;
conf->requests = NGX_CONF_UNSET_UINT;
conf->responses = NGX_CONF_UNSET_UINT;
conf->next_upstream_tries = NGX_CONF_UNSET_UINT;
conf->next_upstream = NGX_CONF_UNSET;
conf->proxy_protocol = NGX_CONF_UNSET;
conf->local = NGX_CONF_UNSET_PTR;
conf->socket_keepalive = NGX_CONF_UNSET;
conf->half_close = NGX_CONF_UNSET;
#if (NGX_STREAM_SSL)
conf->ssl_enable = NGX_CONF_UNSET;
conf->ssl_session_reuse = NGX_CONF_UNSET;
conf->ssl_name = NGX_CONF_UNSET_PTR;
conf->ssl_server_name = NGX_CONF_UNSET;
conf->ssl_verify = NGX_CONF_UNSET;
conf->ssl_verify_depth = NGX_CONF_UNSET_UINT;
conf->ssl_certificate = NGX_CONF_UNSET_PTR;
conf->ssl_certificate_key = NGX_CONF_UNSET_PTR;
conf->ssl_passwords = NGX_CONF_UNSET_PTR;
conf->ssl_conf_commands = NGX_CONF_UNSET_PTR;
#endif
return conf;
}
static char *
ngx_stream_proxy_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_stream_proxy_srv_conf_t *prev = parent;
ngx_stream_proxy_srv_conf_t *conf = child;
ngx_conf_merge_msec_value(conf->connect_timeout,
prev->connect_timeout, 60000);
ngx_conf_merge_msec_value(conf->timeout,
prev->timeout, 10 * 60000);
ngx_conf_merge_msec_value(conf->next_upstream_timeout,
prev->next_upstream_timeout, 0);
ngx_conf_merge_size_value(conf->buffer_size,
prev->buffer_size, 16384);
ngx_conf_merge_ptr_value(conf->upload_rate, prev->upload_rate, NULL);
ngx_conf_merge_ptr_value(conf->download_rate, prev->download_rate, NULL);
ngx_conf_merge_uint_value(conf->requests,
prev->requests, 0);
ngx_conf_merge_uint_value(conf->responses,
prev->responses, NGX_MAX_INT32_VALUE);
ngx_conf_merge_uint_value(conf->next_upstream_tries,
prev->next_upstream_tries, 0);
ngx_conf_merge_value(conf->next_upstream, prev->next_upstream, 1);
ngx_conf_merge_value(conf->proxy_protocol, prev->proxy_protocol, 0);
ngx_conf_merge_ptr_value(conf->local, prev->local, NULL);
ngx_conf_merge_value(conf->socket_keepalive,
prev->socket_keepalive, 0);
ngx_conf_merge_value(conf->half_close, prev->half_close, 0);
#if (NGX_STREAM_SSL)
if (ngx_stream_proxy_merge_ssl(cf, conf, prev) != NGX_OK) {
return NGX_CONF_ERROR;
}
ngx_conf_merge_value(conf->ssl_enable, prev->ssl_enable, 0);
ngx_conf_merge_value(conf->ssl_session_reuse,
prev->ssl_session_reuse, 1);
ngx_conf_merge_bitmask_value(conf->ssl_protocols, prev->ssl_protocols,
(NGX_CONF_BITMASK_SET
|NGX_SSL_TLSv1|NGX_SSL_TLSv1_1
|NGX_SSL_TLSv1_2|NGX_SSL_TLSv1_3));
ngx_conf_merge_str_value(conf->ssl_ciphers, prev->ssl_ciphers, "DEFAULT");
ngx_conf_merge_ptr_value(conf->ssl_name, prev->ssl_name, NULL);
ngx_conf_merge_value(conf->ssl_server_name, prev->ssl_server_name, 0);
ngx_conf_merge_value(conf->ssl_verify, prev->ssl_verify, 0);
ngx_conf_merge_uint_value(conf->ssl_verify_depth,
prev->ssl_verify_depth, 1);
ngx_conf_merge_str_value(conf->ssl_trusted_certificate,
prev->ssl_trusted_certificate, "");
ngx_conf_merge_str_value(conf->ssl_crl, prev->ssl_crl, "");
ngx_conf_merge_ptr_value(conf->ssl_certificate,
prev->ssl_certificate, NULL);
ngx_conf_merge_ptr_value(conf->ssl_certificate_key,
prev->ssl_certificate_key, NULL);
ngx_conf_merge_ptr_value(conf->ssl_passwords, prev->ssl_passwords, NULL);
ngx_conf_merge_ptr_value(conf->ssl_conf_commands,
prev->ssl_conf_commands, NULL);
if (conf->ssl_enable && ngx_stream_proxy_set_ssl(cf, conf) != NGX_OK) {
return NGX_CONF_ERROR;
}
#endif
return NGX_CONF_OK;
}
#if (NGX_STREAM_SSL)
static ngx_int_t
ngx_stream_proxy_merge_ssl(ngx_conf_t *cf, ngx_stream_proxy_srv_conf_t *conf,
ngx_stream_proxy_srv_conf_t *prev)
{
ngx_uint_t preserve;
if (conf->ssl_protocols == 0
&& conf->ssl_ciphers.data == NULL
&& conf->ssl_certificate == NGX_CONF_UNSET_PTR
&& conf->ssl_certificate_key == NGX_CONF_UNSET_PTR
&& conf->ssl_passwords == NGX_CONF_UNSET_PTR
&& conf->ssl_verify == NGX_CONF_UNSET
&& conf->ssl_verify_depth == NGX_CONF_UNSET_UINT
&& conf->ssl_trusted_certificate.data == NULL
&& conf->ssl_crl.data == NULL
&& conf->ssl_session_reuse == NGX_CONF_UNSET
&& conf->ssl_conf_commands == NGX_CONF_UNSET_PTR)
{
if (prev->ssl) {
conf->ssl = prev->ssl;
return NGX_OK;
}
preserve = 1;
} else {
preserve = 0;
}
conf->ssl = ngx_pcalloc(cf->pool, sizeof(ngx_ssl_t));
if (conf->ssl == NULL) {
return NGX_ERROR;
}
conf->ssl->log = cf->log;
/*
* special handling to preserve conf->ssl
* in the "stream" section to inherit it to all servers
*/
if (preserve) {
prev->ssl = conf->ssl;
}
return NGX_OK;
}
static ngx_int_t
ngx_stream_proxy_set_ssl(ngx_conf_t *cf, ngx_stream_proxy_srv_conf_t *pscf)
{
ngx_pool_cleanup_t *cln;
if (pscf->ssl->ctx) {
return NGX_OK;
}
if (ngx_ssl_create(pscf->ssl, pscf->ssl_protocols, NULL) != NGX_OK) {
return NGX_ERROR;
}
cln = ngx_pool_cleanup_add(cf->pool, 0);
if (cln == NULL) {
ngx_ssl_cleanup_ctx(pscf->ssl);
return NGX_ERROR;
}
cln->handler = ngx_ssl_cleanup_ctx;
cln->data = pscf->ssl;
if (ngx_ssl_ciphers(cf, pscf->ssl, &pscf->ssl_ciphers, 0) != NGX_OK) {
return NGX_ERROR;
}
if (pscf->ssl_certificate
&& pscf->ssl_certificate->value.len)
{
if (pscf->ssl_certificate_key == NULL) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"no \"proxy_ssl_certificate_key\" is defined "
"for certificate \"%V\"",
&pscf->ssl_certificate->value);
return NGX_ERROR;
}
if (pscf->ssl_certificate->lengths
|| pscf->ssl_certificate_key->lengths)
{
pscf->ssl_passwords =
ngx_ssl_preserve_passwords(cf, pscf->ssl_passwords);
if (pscf->ssl_passwords == NULL) {
return NGX_ERROR;
}
} else {
if (ngx_ssl_certificate(cf, pscf->ssl,
&pscf->ssl_certificate->value,
&pscf->ssl_certificate_key->value,
pscf->ssl_passwords)
!= NGX_OK)
{
return NGX_ERROR;
}
}
}
if (pscf->ssl_verify) {
if (pscf->ssl_trusted_certificate.len == 0) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"no proxy_ssl_trusted_certificate for proxy_ssl_verify");
return NGX_ERROR;
}
if (ngx_ssl_trusted_certificate(cf, pscf->ssl,
&pscf->ssl_trusted_certificate,
pscf->ssl_verify_depth)
!= NGX_OK)
{
return NGX_ERROR;
}
if (ngx_ssl_crl(cf, pscf->ssl, &pscf->ssl_crl) != NGX_OK) {
return NGX_ERROR;
}
}
if (ngx_ssl_client_session_cache(cf, pscf->ssl, pscf->ssl_session_reuse)
!= NGX_OK)
{
return NGX_ERROR;
}
if (ngx_ssl_conf_commands(cf, pscf->ssl, pscf->ssl_conf_commands)
!= NGX_OK)
{
return NGX_ERROR;
}
return NGX_OK;
}
#endif
static char *
ngx_stream_proxy_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_stream_proxy_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->upstream || pscf->upstream_value) {
return "is duplicate";
}
cscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_core_module);
cscf->handler = ngx_stream_proxy_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->upstream_value = ngx_palloc(cf->pool,
sizeof(ngx_stream_complex_value_t));
if (pscf->upstream_value == NULL) {
return NGX_CONF_ERROR;
}
*pscf->upstream_value = cv;
return NGX_CONF_OK;
}
ngx_memzero(&u, sizeof(ngx_url_t));
u.url = *url;
u.no_resolve = 1;
pscf->upstream = ngx_stream_upstream_add(cf, &u, 0);
if (pscf->upstream == NULL) {
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
static char *
ngx_stream_proxy_bind(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_stream_proxy_srv_conf_t *pscf = conf;
ngx_int_t rc;
ngx_str_t *value;
ngx_stream_complex_value_t cv;
ngx_stream_upstream_local_t *local;
ngx_stream_compile_complex_value_t ccv;
if (pscf->local != NGX_CONF_UNSET_PTR) {
return "is duplicate";
}
value = cf->args->elts;
if (cf->args->nelts == 2 && ngx_strcmp(value[1].data, "off") == 0) {
pscf->local = NULL;
return NGX_CONF_OK;
}
ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t));
ccv.cf = cf;
ccv.value = &value[1];
ccv.complex_value = &cv;
if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) {
return NGX_CONF_ERROR;
}
local = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_local_t));
if (local == NULL) {
return NGX_CONF_ERROR;
}
pscf->local = local;
if (cv.lengths) {
local->value = ngx_palloc(cf->pool, sizeof(ngx_stream_complex_value_t));
if (local->value == NULL) {
return NGX_CONF_ERROR;
}
*local->value = cv;
} else {
local->addr = ngx_palloc(cf->pool, sizeof(ngx_addr_t));
if (local->addr == NULL) {
return NGX_CONF_ERROR;
}
rc = ngx_parse_addr_port(cf->pool, local->addr, value[1].data,
value[1].len);
switch (rc) {
case NGX_OK:
local->addr->name = value[1];
break;
case NGX_DECLINED:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid address \"%V\"", &value[1]);
/* fall through */
default:
return NGX_CONF_ERROR;
}
}
if (cf->args->nelts > 2) {
if (ngx_strcmp(value[2].data, "transparent") == 0) {
#if (NGX_HAVE_TRANSPARENT_PROXY)
ngx_core_conf_t *ccf;
ccf = (ngx_core_conf_t *) ngx_get_conf(cf->cycle->conf_ctx,
ngx_core_module);
ccf->transparent = 1;
local->transparent = 1;
#else
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"transparent proxying is not supported "
"on this platform, ignored");
#endif
} else {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid parameter \"%V\"", &value[2]);
return NGX_CONF_ERROR;
}
}
return NGX_CONF_OK;
}
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