Mercurial > hg > nginx-quic
view src/stream/ngx_stream_proxy_module.c @ 6749:f88a145b093e stable-1.10
HTTP/2: the "421 Misdirected Request" response (closes #848).
Since 4fbef397c753 nginx rejects with the 400 error any attempts of
requesting different host over the same connection, if the relevant
virtual server requires verification of a client certificate.
While requesting hosts other than negotiated isn't something legal
in HTTP/1.x, the HTTP/2 specification explicitly permits such requests
for connection reuse and has introduced a special response code 421.
According to RFC 7540 Section 9.1.2 this code can be sent by a server
that is not configured to produce responses for the combination of
scheme and authority that are included in the request URI. And the
client may retry the request over a different connection.
Now this code is used for requests that aren't authorized in current
connection. After receiving the 421 response a client will be able
to open a new connection, provide the required certificate and retry
the request.
Unfortunately, not all clients currently are able to handle it well.
Notably Chrome just shows an error, while at least the latest version
of Firefox retries the request over a new connection.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Fri, 20 May 2016 18:41:17 +0300 |
parents | a01e315b3a78 |
children | cb8177ca0990 |
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/* * Copyright (C) Roman Arutyunyan * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> typedef struct { ngx_msec_t connect_timeout; ngx_msec_t timeout; ngx_msec_t next_upstream_timeout; size_t buffer_size; size_t upload_rate; size_t download_rate; ngx_uint_t responses; ngx_uint_t next_upstream_tries; ngx_flag_t next_upstream; ngx_flag_t proxy_protocol; ngx_addr_t *local; #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_str_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_str_t ssl_certificate; ngx_str_t ssl_certificate_key; ngx_array_t *ssl_passwords; ngx_ssl_t *ssl; #endif ngx_stream_upstream_srv_conf_t *upstream; } ngx_stream_proxy_srv_conf_t; static void ngx_stream_proxy_handler(ngx_stream_session_t *s); 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_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 void ngx_stream_proxy_next_upstream(ngx_stream_session_t *s); static void ngx_stream_proxy_finalize(ngx_stream_session_t *s, ngx_int_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); static ngx_int_t ngx_stream_proxy_send_proxy_protocol(ngx_stream_session_t *s); #if (NGX_STREAM_SSL) static char *ngx_stream_proxy_ssl_password_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); 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 ngx_int_t ngx_stream_proxy_ssl_name(ngx_stream_session_t *s); 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_null_string, 0 } }; #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_TAKE1, ngx_stream_proxy_bind, NGX_STREAM_SRV_CONF_OFFSET, 0, 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_conf_set_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_conf_set_size_slot, NGX_STREAM_SRV_CONF_OFFSET, offsetof(ngx_stream_proxy_srv_conf_t, download_rate), 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 }, #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_conf_set_str_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_conf_set_str_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_conf_set_str_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 }, #endif ngx_null_command }; static ngx_stream_module_t ngx_stream_proxy_module_ctx = { 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_connection_t *c; ngx_stream_upstream_t *u; ngx_stream_proxy_srv_conf_t *pscf; ngx_stream_upstream_srv_conf_t *uscf; 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_ERROR); return; } s->upstream = u; s->log_handler = ngx_stream_proxy_log_error; u->peer.log = c->log; u->peer.log_error = NGX_ERROR_ERR; u->peer.local = pscf->local; u->peer.type = c->type; uscf = pscf->upstream; if (uscf->peer.init(s, uscf) != NGX_OK) { ngx_stream_proxy_finalize(s, NGX_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; } u->proxy_protocol = pscf->proxy_protocol; u->start_sec = ngx_time(); c->write->handler = ngx_stream_proxy_downstream_handler; c->read->handler = ngx_stream_proxy_downstream_handler; if (c->type == SOCK_DGRAM) { ngx_stream_proxy_connect(s); return; } p = ngx_pnalloc(c->pool, pscf->buffer_size); if (p == NULL) { ngx_stream_proxy_finalize(s, NGX_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 (u->proxy_protocol #if (NGX_STREAM_SSL) && pscf->ssl == NULL #endif && pscf->buffer_size >= NGX_PROXY_PROTOCOL_MAX_HEADER) { /* optimization for a typical case */ ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0, "stream proxy send PROXY protocol header"); p = ngx_proxy_protocol_write(c, u->downstream_buf.last, u->downstream_buf.end); if (p == NULL) { ngx_stream_proxy_finalize(s, NGX_ERROR); return; } u->downstream_buf.last = p; u->proxy_protocol = 0; } if (c->read->ready) { ngx_post_event(c->read, &ngx_posted_events); } ngx_stream_proxy_connect(s); } 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"; u = s->upstream; 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_ERROR); return; } if (rc == NGX_BUSY) { ngx_log_error(NGX_LOG_ERR, c->log, 0, "no live upstreams"); ngx_stream_proxy_finalize(s, NGX_DECLINED); 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; pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module); ngx_add_timer(pc->write, pscf->connect_timeout); } static void ngx_stream_proxy_init_upstream(ngx_stream_session_t *s) { int tcp_nodelay; u_char *p; 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 && pc->tcp_nodelay == NGX_TCP_NODELAY_UNSET) { ngx_log_debug0(NGX_LOG_DEBUG_STREAM, pc->log, 0, "tcp_nodelay"); tcp_nodelay = 1; if (setsockopt(pc->fd, IPPROTO_TCP, TCP_NODELAY, (const void *) &tcp_nodelay, sizeof(int)) == -1) { ngx_connection_error(pc, ngx_socket_errno, "setsockopt(TCP_NODELAY) failed"); ngx_stream_proxy_next_upstream(s); return; } pc->tcp_nodelay = NGX_TCP_NODELAY_SET; } if (u->proxy_protocol) { if (ngx_stream_proxy_send_proxy_protocol(s) != NGX_OK) { return; } u->proxy_protocol = 0; } pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module); #if (NGX_STREAM_SSL) if (pc->type == SOCK_STREAM && pscf->ssl && 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; } } c->log->action = "proxying connection"; if (u->upstream_buf.start == NULL) { p = ngx_pnalloc(c->pool, pscf->buffer_size); if (p == NULL) { ngx_stream_proxy_finalize(s, NGX_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->type == SOCK_DGRAM) { s->received = c->buffer->last - c->buffer->pos; u->downstream_buf = *c->buffer; if (pscf->responses == 0) { pc->read->ready = 0; pc->read->eof = 1; } } u->connected = 1; pc->read->handler = ngx_stream_proxy_upstream_handler; pc->write->handler = ngx_stream_proxy_upstream_handler; if (pc->read->ready || pc->read->eof) { ngx_post_event(pc->read, &ngx_posted_events); } ngx_stream_proxy_process(s, 0, 1); } 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_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_MAX_HEADER); if (p == NULL) { ngx_stream_proxy_finalize(s, NGX_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_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_DECLINED); 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_DECLINED); return NGX_ERROR; } return NGX_OK; } #if (NGX_STREAM_SSL) 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 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_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_ERROR); return; } } if (pscf->ssl_session_reuse) { if (u->peer.set_session(&u->peer, u->peer.data) != NGX_OK) { ngx_stream_proxy_finalize(s, NGX_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 (pscf->ssl_session_reuse) { u = s->upstream; u->peer.save_session(&u->peer, u->peer.data); } 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 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; name = pscf->ssl_name; if (name.len == 0) { name = pscf->upstream->host; } 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, 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; } #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_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_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; 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_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) { /* * successfully terminate timed out UDP session * with unspecified number of responses */ pc->read->ready = 0; pc->read->eof = 1; ngx_stream_proxy_process(s, 1, 0); return; } if (u->received == 0) { ngx_stream_proxy_next_upstream(s); return; } } ngx_connection_error(c, NGX_ETIMEDOUT, "connection timed out"); ngx_stream_proxy_finalize(s, NGX_DECLINED); 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_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) { off_t *received, limit; size_t size, limit_rate; ssize_t n; ngx_buf_t *b; ngx_uint_t flags; ngx_msec_t delay; 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_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 = pscf->download_rate; received = &u->received; } else { src = c; dst = pc; b = &u->downstream_buf; limit_rate = pscf->upload_rate; received = &s->received; } for ( ;; ) { if (do_write) { size = b->last - b->pos; if (size && dst && dst->write->ready) { n = dst->send(dst, b->pos, size); if (n == NGX_AGAIN && dst->shared) { /* cannot wait on a shared socket */ n = NGX_ERROR; } if (n == NGX_ERROR) { if (c->type == SOCK_DGRAM && !from_upstream) { ngx_stream_proxy_next_upstream(s); return; } ngx_stream_proxy_finalize(s, NGX_DECLINED); return; } if (n > 0) { b->pos += n; if (b->pos == b->last) { 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 ((off_t) size > limit) { size = (size_t) limit; } } n = src->recv(src, b->last, size); if (n == NGX_AGAIN || n == 0) { break; } 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 (c->type == SOCK_DGRAM && ++u->responses == pscf->responses) { src->read->ready = 0; src->read->eof = 1; } *received += n; b->last += n; do_write = 1; continue; } if (n == NGX_ERROR) { if (c->type == SOCK_DGRAM && u->received == 0) { ngx_stream_proxy_next_upstream(s); return; } src->read->eof = 1; } } break; } if (src->read->eof && (b->pos == b->last || (dst && dst->read->eof))) { handler = c->log->handler; c->log->handler = NULL; ngx_log_error(NGX_LOG_INFO, c->log, 0, "%s%s disconnected" ", bytes from/to client:%O/%O" ", bytes from/to upstream:%O/%O", src->type == SOCK_DGRAM ? "udp " : "", from_upstream ? "upstream" : "client", s->received, c->sent, u->received, pc ? pc->sent : 0); c->log->handler = handler; ngx_stream_proxy_finalize(s, NGX_OK); return; } flags = src->read->eof ? NGX_CLOSE_EVENT : 0; if (!src->shared && ngx_handle_read_event(src->read, flags) != NGX_OK) { ngx_stream_proxy_finalize(s, NGX_ERROR); return; } if (dst) { if (!dst->shared && ngx_handle_write_event(dst->write, 0) != NGX_OK) { ngx_stream_proxy_finalize(s, NGX_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 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; 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_DECLINED); return; } pc = u->peer.connection; 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 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_int_t rc) { 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->peer.free && u->peer.sockaddr) { u->peer.free(&u->peer, u->peer.data, 0); u->peer.sockaddr = NULL; } pc = u->peer.connection; 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_close_connection(s->connection); } 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_name = { 0, NULL }; * conf->ssl_trusted_certificate = { 0, NULL }; * conf->ssl_crl = { 0, NULL }; * conf->ssl_certificate = { 0, NULL }; * conf->ssl_certificate_key = { 0, NULL }; * * conf->ssl = NULL; * conf->upstream = 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_SIZE; conf->download_rate = NGX_CONF_UNSET_SIZE; 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; #if (NGX_STREAM_SSL) conf->ssl_enable = NGX_CONF_UNSET; conf->ssl_session_reuse = NGX_CONF_UNSET; conf->ssl_server_name = NGX_CONF_UNSET; conf->ssl_verify = NGX_CONF_UNSET; conf->ssl_verify_depth = NGX_CONF_UNSET_UINT; conf->ssl_passwords = 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_size_value(conf->upload_rate, prev->upload_rate, 0); ngx_conf_merge_size_value(conf->download_rate, prev->download_rate, 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); #if (NGX_STREAM_SSL) 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_conf_merge_str_value(conf->ssl_ciphers, prev->ssl_ciphers, "DEFAULT"); ngx_conf_merge_str_value(conf->ssl_name, prev->ssl_name, ""); 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_str_value(conf->ssl_certificate, prev->ssl_certificate, ""); ngx_conf_merge_str_value(conf->ssl_certificate_key, prev->ssl_certificate_key, ""); ngx_conf_merge_ptr_value(conf->ssl_passwords, prev->ssl_passwords, 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_set_ssl(ngx_conf_t *cf, ngx_stream_proxy_srv_conf_t *pscf) { ngx_pool_cleanup_t *cln; pscf->ssl = ngx_pcalloc(cf->pool, sizeof(ngx_ssl_t)); if (pscf->ssl == NULL) { return NGX_ERROR; } pscf->ssl->log = cf->log; 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) { return NGX_ERROR; } cln->handler = ngx_ssl_cleanup_ctx; cln->data = pscf->ssl; if (pscf->ssl_certificate.len) { if (pscf->ssl_certificate_key.len == 0) { ngx_log_error(NGX_LOG_EMERG, cf->log, 0, "no \"proxy_ssl_certificate_key\" is defined " "for certificate \"%V\"", &pscf->ssl_certificate); return NGX_ERROR; } if (ngx_ssl_certificate(cf, pscf->ssl, &pscf->ssl_certificate, &pscf->ssl_certificate_key, pscf->ssl_passwords) != NGX_OK) { return NGX_ERROR; } } if (SSL_CTX_set_cipher_list(pscf->ssl->ctx, (const char *) pscf->ssl_ciphers.data) == 0) { ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0, "SSL_CTX_set_cipher_list(\"%V\") failed", &pscf->ssl_ciphers); 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; } } 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_core_srv_conf_t *cscf; if (pscf->upstream) { 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(&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; if (pscf->local != NGX_CONF_UNSET_PTR) { return "is duplicate"; } value = cf->args->elts; if (ngx_strcmp(value[1].data, "off") == 0) { pscf->local = NULL; return NGX_CONF_OK; } pscf->local = ngx_palloc(cf->pool, sizeof(ngx_addr_t)); if (pscf->local == NULL) { return NGX_CONF_ERROR; } rc = ngx_parse_addr(cf->pool, pscf->local, value[1].data, value[1].len); switch (rc) { case NGX_OK: pscf->local->name = value[1]; return NGX_CONF_OK; case NGX_DECLINED: ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid address \"%V\"", &value[1]); /* fall through */ default: return NGX_CONF_ERROR; } }