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https://github.com/haproxy/haproxy.git
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4834bc773c
This patch adds support of variables during the processing of each stream. The variables scope can be set as 'session', 'transaction', 'request' or 'response'. The variable type is the type returned by the assignment expression. The type can change while the processing. The allocated memory can be controlled for each scope and each request, and for the global process.
133 lines
4.5 KiB
C
133 lines
4.5 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 <common/chunk.h>
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#include <common/mini-clist.h>
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#include <types/vars.h>
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/* encoding of each arg type : up to 31 types are supported */
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#define ARGT_BITS 5
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#define ARGT_NBTYPES (1 << ARGT_BITS)
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#define ARGT_MASK (ARGT_NBTYPES - 1)
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/* encoding of the arg count : up to 5 args are possible. 4 bits are left
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* unused at the top.
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*/
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#define ARGM_MASK ((1 << ARGM_BITS) - 1)
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#define ARGM_BITS 3
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#define ARGM_NBARGS (32 - ARGM_BITS) / sizeof(int)
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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_MAP, /* a pointer to a map descriptor */
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ARGT_REG, /* a pointer to a regex */
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ARGT_VAR, /* contains a variable description. */
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};
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/* context where arguments are used, in order to help error reporting */
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enum {
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ARGC_ACL = 0, /* ACL */
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ARGC_STK, /* sticking rule */
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ARGC_TRK, /* tracking rule */
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ARGC_LOG, /* log-format */
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ARGC_HRQ, /* http-request */
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ARGC_HRS, /* http-response */
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ARGC_UIF, /* unique-id-format */
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ARGC_RDR, /* redirect */
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ARGC_CAP, /* capture rule */
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};
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/* flags used when compiling and executing regex */
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#define ARGF_REG_ICASE 1
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#define ARGF_REG_GLOB 2
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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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struct my_regex;
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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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struct map_descriptor *map;
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struct my_regex *reg;
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struct var_desc var;
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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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unsigned char type_flags; /* type-specific extra flags (eg: case sensitivity for regex), ARGF_* */
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union arg_data data; /* argument data */
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};
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/* arg lists are used to store information about arguments that could not be
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* resolved when parsing the configuration. The head is an arg_list which
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* serves as a template to create new entries. Nothing here is allocated,
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* so plain copies are OK.
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*/
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struct arg_list {
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struct list list; /* chaining with other arg_list, or list head */
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struct arg *arg; /* pointer to the arg, NULL on list head */
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int arg_pos; /* argument position */
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int ctx; /* context where the arg is used (ARGC_*) */
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const char *kw; /* keyword making use of these args */
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const char *conv; /* conv keyword when in conv, otherwise NULL */
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const char *file; /* file name where the args are referenced */
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int line; /* line number where the args are referenced */
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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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