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https://github.com/haproxy/haproxy.git
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496aa0111e
When passing arguments to ACLs and samples, some types are stored as strings then resolved later after config parsing is done. Upon exit, the arguments need to be freed only if the string was not resolved yet. At the moment we can encounter double free during deinit() because some arguments (eg: userlists) are freed once as their own type and once as a string. The solution consists in adding an "unresolved" flag to the args to say whether the value is still held in the <str> part or is final. This could be debugged thanks to a useful bug report from Sander Klein.
79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
/*
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* include/types/arg.h
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* This file contains structure declarations for generaic argument parsing.
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*
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* Copyright 2012 Willy Tarreau <w@1wt.eu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _TYPES_ARG_H
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#define _TYPES_ARG_H
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <types/buffers.h>
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enum {
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ARGT_STOP = 0, /* end of the arg list */
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ARGT_UINT, /* unsigned integer, which is a positive integer without any sign */
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ARGT_SINT, /* signed integer, the sign (+/-) was explicit. Falls back to UINT if no sign. */
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ARGT_STR, /* string */
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ARGT_IPV4, /* an IPv4 address */
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ARGT_MSK4, /* an IPv4 address mask (integer or dotted), stored as ARGT_IPV4 */
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ARGT_IPV6, /* an IPv6 address */
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ARGT_MSK6, /* an IPv6 address mask (integer or dotted), stored as ARGT_IPV4 */
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ARGT_TIME, /* a delay in ms by default, stored as ARGT_UINT */
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ARGT_SIZE, /* a size in bytes by default, stored as ARGT_UINT */
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ARGT_FE, /* a pointer to a frontend only */
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ARGT_BE, /* a pointer to a backend only */
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ARGT_TAB, /* a pointer to a stick table */
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ARGT_SRV, /* a pointer to a server */
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ARGT_USR, /* a pointer to a user list */
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ARGT_UNASSIGNED15, /* will probably be used for variables later */
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ARGT_NBTYPES /* no more values past 15 */
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};
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/* some types that are externally defined */
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struct proxy;
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struct server;
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struct userlist;
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union arg_data {
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unsigned int uint; /* used for uint, time, size */
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int sint;
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struct chunk str;
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struct in_addr ipv4;
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struct in6_addr ipv6;
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struct proxy *prx; /* used for fe, be, tables */
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struct server *srv;
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struct userlist *usr;
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};
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struct arg {
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unsigned char type; /* argument type, ARGT_* */
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unsigned char unresolved; /* argument contains a string in <str> that must be resolved and freed */
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union arg_data data; /* argument data */
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};
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#endif /* _TYPES_ARG_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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