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Resolver: fixed handling of partially resolved SRV. The resolver handles SRV requests in two stages. In the first stage it gets all SRV RRs, and in the second stage it resolves the names from SRV RRs into addresses. Previously, if a response to an SRV request was cached, the queries to resolve names were not limited by a timeout. If a response to any of these queries was not received, the SRV request could never complete. If a response to an SRV request was not cached, and some of the queries to resolve names timed out, NGX_RESOLVE_TIMEDOUT was returned instead of successfully resolved addresses. To fix both issues, resolving of names is now always limited by a timeout.
author Dmitry Volyntsev <xeioex@nginx.com>
date Fri, 16 Dec 2016 18:21:55 +0300
parents 51e1f047d15d
children 7f955d3b9a0d
line wrap: on
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_MAIL_SSL_H_INCLUDED_
#define _NGX_MAIL_SSL_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_mail.h>


#define NGX_MAIL_STARTTLS_OFF   0
#define NGX_MAIL_STARTTLS_ON    1
#define NGX_MAIL_STARTTLS_ONLY  2


typedef struct {
    ngx_flag_t       enable;
    ngx_flag_t       prefer_server_ciphers;

    ngx_ssl_t        ssl;

    ngx_uint_t       starttls;
    ngx_uint_t       protocols;

    ngx_uint_t       verify;
    ngx_uint_t       verify_depth;

    ssize_t          builtin_session_cache;

    time_t           session_timeout;

    ngx_array_t     *certificates;
    ngx_array_t     *certificate_keys;

    ngx_str_t        dhparam;
    ngx_str_t        ecdh_curve;
    ngx_str_t        client_certificate;
    ngx_str_t        trusted_certificate;
    ngx_str_t        crl;

    ngx_str_t        ciphers;

    ngx_array_t     *passwords;

    ngx_shm_zone_t  *shm_zone;

    ngx_flag_t       session_tickets;
    ngx_array_t     *session_ticket_keys;

    u_char          *file;
    ngx_uint_t       line;
} ngx_mail_ssl_conf_t;


extern ngx_module_t  ngx_mail_ssl_module;


#endif /* _NGX_MAIL_SSL_H_INCLUDED_ */