Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 1 | /* |
Willy Tarreau | f4f0412 | 2010-01-28 18:10:50 +0100 | [diff] [blame] | 2 | * include/common/regex.h |
| 3 | * This file defines everything related to regular expressions. |
| 4 | * |
| 5 | * Copyright (C) 2000-2010 Willy Tarreau - w@1wt.eu |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation, version 2.1 |
| 10 | * exclusively. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with this library; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 21 | |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 22 | #ifndef _COMMON_REGEX_H |
| 23 | #define _COMMON_REGEX_H |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 24 | |
Thierry FOURNIER | e28f1ec | 2013-10-09 15:23:01 +0200 | [diff] [blame^] | 25 | #include <stdlib.h> |
| 26 | |
Willy Tarreau | e3ba5f0 | 2006-06-29 18:54:54 +0200 | [diff] [blame] | 27 | #include <common/config.h> |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 28 | |
| 29 | #ifdef USE_PCRE |
| 30 | #include <pcre.h> |
| 31 | #include <pcreposix.h> |
Hiroaki Nakamura | 7035132 | 2013-01-13 15:00:42 +0900 | [diff] [blame] | 32 | |
| 33 | #ifdef USE_PCRE_JIT |
| 34 | struct jit_regex { |
| 35 | pcre *reg; |
| 36 | pcre_extra *extra; |
| 37 | }; |
| 38 | typedef struct jit_regex regex; |
| 39 | #else /* no PCRE_JIT */ |
| 40 | typedef regex_t regex; |
| 41 | #endif |
| 42 | |
| 43 | #else /* no PCRE */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 44 | #include <regex.h> |
Hiroaki Nakamura | 7035132 | 2013-01-13 15:00:42 +0900 | [diff] [blame] | 45 | typedef regex_t regex; |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 46 | #endif |
| 47 | |
| 48 | /* what to do when a header matches a regex */ |
| 49 | #define ACT_ALLOW 0 /* allow the request */ |
| 50 | #define ACT_REPLACE 1 /* replace the matching header */ |
| 51 | #define ACT_REMOVE 2 /* remove the matching header */ |
| 52 | #define ACT_DENY 3 /* deny the request */ |
| 53 | #define ACT_PASS 4 /* pass this header without allowing or denying the request */ |
Willy Tarreau | b8750a8 | 2006-09-03 09:56:00 +0200 | [diff] [blame] | 54 | #define ACT_TARPIT 5 /* tarpit the connection matching this request */ |
Willy Tarreau | a496b60 | 2006-12-17 23:15:24 +0100 | [diff] [blame] | 55 | #define ACT_SETBE 6 /* switch the backend */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 56 | |
| 57 | struct hdr_exp { |
| 58 | struct hdr_exp *next; |
Willy Tarreau | b17916e | 2006-10-15 15:17:57 +0200 | [diff] [blame] | 59 | const regex_t *preg; /* expression to look for */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 60 | int action; /* ACT_ALLOW, ACT_REPLACE, ACT_REMOVE, ACT_DENY */ |
Willy Tarreau | b17916e | 2006-10-15 15:17:57 +0200 | [diff] [blame] | 61 | const char *replace; /* expression to set instead */ |
Willy Tarreau | f4f0412 | 2010-01-28 18:10:50 +0100 | [diff] [blame] | 62 | void *cond; /* a possible condition or NULL */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 63 | }; |
| 64 | |
| 65 | extern regmatch_t pmatch[MAX_MATCH]; |
| 66 | |
Willy Tarreau | b17916e | 2006-10-15 15:17:57 +0200 | [diff] [blame] | 67 | int exp_replace(char *dst, char *src, const char *str, const regmatch_t *matches); |
| 68 | const char *check_replace_string(const char *str); |
| 69 | const char *chain_regex(struct hdr_exp **head, const regex_t *preg, |
Willy Tarreau | f4f0412 | 2010-01-28 18:10:50 +0100 | [diff] [blame] | 70 | int action, const char *replace, void *cond); |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 71 | |
Hiroaki Nakamura | 7035132 | 2013-01-13 15:00:42 +0900 | [diff] [blame] | 72 | static inline int regex_exec(const regex *preg, const char *subject, int length) { |
| 73 | #ifdef USE_PCRE_JIT |
| 74 | return pcre_exec(preg->reg, preg->extra, subject, length, 0, 0, NULL, 0); |
| 75 | #else |
| 76 | return regexec(preg, subject, 0, NULL, 0); |
| 77 | #endif |
| 78 | } |
| 79 | |
| 80 | static inline void regex_free(regex *preg) { |
| 81 | #ifdef USE_PCRE_JIT |
| 82 | pcre_free_study(preg->extra); |
| 83 | pcre_free(preg->reg); |
Hiroaki Nakamura | 7035132 | 2013-01-13 15:00:42 +0900 | [diff] [blame] | 84 | #else |
| 85 | regfree(preg); |
| 86 | #endif |
| 87 | } |
| 88 | |
Willy Tarreau | 2dd0d47 | 2006-06-29 17:53:05 +0200 | [diff] [blame] | 89 | #endif /* _COMMON_REGEX_H */ |
Willy Tarreau | baaee00 | 2006-06-26 02:48:02 +0200 | [diff] [blame] | 90 | |
| 91 | /* |
| 92 | * Local variables: |
| 93 | * c-indent-level: 8 |
| 94 | * c-basic-offset: 8 |
| 95 | * End: |
| 96 | */ |