1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/*
* include/proto/sample.h
* Functions for samples management.
*
* Copyright (C) 2009-2010 EXCELIANCE, Emeric Brun <ebrun@exceliance.fr>
* Copyright (C) 2012 Willy Tarreau <w@1wt.eu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, version 2.1
* exclusively.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _PROTO_SAMPLE_H
#define _PROTO_SAMPLE_H
#include <types/sample.h>
#include <types/stick_table.h>
extern const char *smp_to_type[SMP_TYPES];
struct sample_expr *sample_parse_expr(char **str, int *idx, const char *file, int line, char **err, struct arg_list *al);
struct sample_conv *find_sample_conv(const char *kw, int len);
struct sample *sample_process(struct proxy *px, struct session *sess,
struct stream *strm, unsigned int opt,
struct sample_expr *expr, struct sample *p);
struct sample *sample_fetch_as_type(struct proxy *px, struct session *sess,
struct stream *strm, unsigned int opt,
struct sample_expr *expr, int smp_type);
void release_sample_expr(struct sample_expr *expr);
void sample_register_fetches(struct sample_fetch_kw_list *psl);
void sample_register_convs(struct sample_conv_kw_list *psl);
const char *sample_src_names(unsigned int use);
const char *sample_ckp_names(unsigned int use);
struct sample_fetch *find_sample_fetch(const char *kw, int len);
struct sample_fetch *sample_fetch_getnext(struct sample_fetch *current, int *idx);
struct sample_conv *sample_conv_getnext(struct sample_conv *current, int *idx);
int smp_resolve_args(struct proxy *p);
int smp_expr_output_type(struct sample_expr *expr);
int c_none(struct sample *smp);
int smp_dup(struct sample *smp);
/*
* This function just apply a cast on sample. It returns 0 if the cast is not
* avalaible or if the cast fails, otherwise returns 1. It does not modify the
* input sample on failure.
*/
static inline
int sample_convert(struct sample *sample, int req_type)
{
if (!sample_casts[sample->data.type][req_type])
return 0;
if (sample_casts[sample->data.type][req_type] == c_none)
return 1;
return sample_casts[sample->data.type][req_type](sample);
}
static inline
struct sample *smp_set_owner(struct sample *smp, struct proxy *px,
struct session *sess, struct stream *strm, int opt)
{
smp->px = px;
smp->sess = sess;
smp->strm = strm;
smp->opt = opt;
return smp;
}
/* Returns 1 if a sample may be safely used. It performs a few checks on the
* string length versus size, same for the binary version, and ensures that
* strings are properly terminated by a zero. If this last point is not granted
* but the string is not const, then the \0 is appended. Otherwise it returns 0,
* meaning the caller may need to call smp_dup() before going further.
*/
static inline
int smp_is_safe(struct sample *smp)
{
switch (smp->data.type) {
case SMP_T_METH:
if (smp->data.u.meth.meth != HTTP_METH_OTHER)
return 1;
/* Fall through */
case SMP_T_STR:
if ((smp->data.u.str.len < 0) ||
(smp->data.u.str.size && smp->data.u.str.len >= smp->data.u.str.size))
return 0;
if (smp->data.u.str.str[smp->data.u.str.len] == 0)
return 1;
if (!smp->data.u.str.size || (smp->flags & SMP_F_CONST))
return 0;
smp->data.u.str.str[smp->data.u.str.len] = 0;
return 1;
case SMP_T_BIN:
return (smp->data.u.str.len >= 0) &&
(!smp->data.u.str.size || smp->data.u.str.len <= smp->data.u.str.size);
default:
return 1;
}
}
/* checks that a sample may freely be used, or duplicates it to normalize it.
* Returns 1 on success, 0 if the sample must not be used. The function also
* checks for NULL to simplify the calling code.
*/
static inline
int smp_make_safe(struct sample *smp)
{
return smp && (smp_is_safe(smp) || smp_dup(smp));
}
/* Returns 1 if a sample may be safely modified in place. It performs a few
* checks on the string length versus size, same for the binary version, and
* ensures that strings are properly terminated by a zero, and of course that
* the size is allocate and that the SMP_F_CONST flag is not set. If only the
* trailing zero is missing, it is appended. Otherwise it returns 0, meaning
* the caller may need to call smp_dup() before going further.
*/
static inline
int smp_is_rw(struct sample *smp)
{
if (smp->flags & SMP_F_CONST)
return 0;
switch (smp->data.type) {
case SMP_T_METH:
if (smp->data.u.meth.meth != HTTP_METH_OTHER)
return 1;
/* Fall through */
case SMP_T_STR:
if (!smp->data.u.str.size ||
smp->data.u.str.len < 0 ||
smp->data.u.str.len >= smp->data.u.str.size)
return 0;
if (smp->data.u.str.str[smp->data.u.str.len] != 0)
smp->data.u.str.str[smp->data.u.str.len] = 0;
return 1;
case SMP_T_BIN:
return smp->data.u.str.size &&
smp->data.u.str.len >= 0 &&
smp->data.u.str.len <= smp->data.u.str.size;
default:
return 1;
}
}
/* checks that a sample may freely be modified, or duplicates it to normalize
* it and make it R/W. Returns 1 on success, 0 if the sample must not be used.
* The function also checks for NULL to simplify the calling code.
*/
static inline
int smp_make_rw(struct sample *smp)
{
return smp && (smp_is_rw(smp) || smp_dup(smp));
}
#endif /* _PROTO_SAMPLE_H */
|
