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view src/core/ngx_syslog.h @ 7566:571383f75a9a

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Resolver: fixed possible use-after-free while resolving PTR. Previously, if a response to the PTR request was cached, and ngx_resolver_dup() failed to allocate memory for the resulting name, then the original node was freed but left in expire_queue. A subsequent address resolving would end up in a use-after-free memory access of the node either in ngx_resolver_expire() or ngx_resolver_process_ptr(), when accessing it through expire_queue. The fix is to leave the resolver node intact.
author Sergey Kandaurov <pluknet@nginx.com>
date Tue, 10 Sep 2019 15:42:34 +0300
parents 7f9935f07fe9
children 29adacffdefa
line wrap: on
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/*
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_SYSLOG_H_INCLUDED_
#define _NGX_SYSLOG_H_INCLUDED_


typedef struct {
    ngx_uint_t        facility;
    ngx_uint_t        severity;
    ngx_str_t         tag;

    ngx_addr_t        server;
    ngx_connection_t  conn;
    unsigned          busy:1;
    unsigned          nohostname:1;
} ngx_syslog_peer_t;


char *ngx_syslog_process_conf(ngx_conf_t *cf, ngx_syslog_peer_t *peer);
u_char *ngx_syslog_add_header(ngx_syslog_peer_t *peer, u_char *buf);
void ngx_syslog_writer(ngx_log_t *log, ngx_uint_t level, u_char *buf,
    size_t len);
ssize_t ngx_syslog_send(ngx_syslog_peer_t *peer, u_char *buf, size_t len);


#endif /* _NGX_SYSLOG_H_INCLUDED_ */