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view src/event/ngx_event_connect.h @ 4964:2464ccebdb52

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Upstream: fixed SIGSEGV with the "if" directive. Configuration like location / { set $true 1; if ($true) { proxy_pass http://backend; } if ($true) { # nothing } } resulted in segmentation fault due to NULL pointer dereference as the upstream configuration wasn't initialized in an implicit location created by the last if(), but the r->content_handler was set due to first if(). Instead of committing a suicide by dereferencing a NULL pointer, return 500 (Internal Server Error) in such cases, i.e. if uscf is NULL. Better fix would be to avoid such cases by fixing the "if" directive handling, but it's out of scope of this patch. Prodded by Piotr Sikora.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 13 Dec 2012 16:05:59 +0000
parents d620f497c50f
children d09b689911ac
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_EVENT_CONNECT_H_INCLUDED_
#define _NGX_EVENT_CONNECT_H_INCLUDED_


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


#define NGX_PEER_KEEPALIVE           1
#define NGX_PEER_NEXT                2
#define NGX_PEER_FAILED              4


typedef struct ngx_peer_connection_s  ngx_peer_connection_t;

typedef ngx_int_t (*ngx_event_get_peer_pt)(ngx_peer_connection_t *pc,
    void *data);
typedef void (*ngx_event_free_peer_pt)(ngx_peer_connection_t *pc, void *data,
    ngx_uint_t state);
#if (NGX_SSL)

typedef ngx_int_t (*ngx_event_set_peer_session_pt)(ngx_peer_connection_t *pc,
    void *data);
typedef void (*ngx_event_save_peer_session_pt)(ngx_peer_connection_t *pc,
    void *data);
#endif


struct ngx_peer_connection_s {
    ngx_connection_t                *connection;

    struct sockaddr                 *sockaddr;
    socklen_t                        socklen;
    ngx_str_t                       *name;

    ngx_uint_t                       tries;

    ngx_event_get_peer_pt            get;
    ngx_event_free_peer_pt           free;
    void                            *data;

#if (NGX_SSL)
    ngx_event_set_peer_session_pt    set_session;
    ngx_event_save_peer_session_pt   save_session;
#endif

#if (NGX_THREADS)
    ngx_atomic_t                    *lock;
#endif

    ngx_addr_t                      *local;

    int                              rcvbuf;

    ngx_log_t                       *log;

    unsigned                         cached:1;

                                     /* ngx_connection_log_error_e */
    unsigned                         log_error:2;
};


ngx_int_t ngx_event_connect_peer(ngx_peer_connection_t *pc);
ngx_int_t ngx_event_get_peer(ngx_peer_connection_t *pc, void *data);


#endif /* _NGX_EVENT_CONNECT_H_INCLUDED_ */