Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Patterns management functions. |
| 3 | * |
| 4 | * Copyright 2009-2010 EXCELIANCE, Emeric Brun <ebrun@exceliance.fr> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <string.h> |
| 14 | #include <arpa/inet.h> |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 15 | |
Willy Tarreau | 9fcb984 | 2012-04-20 14:45:49 +0200 | [diff] [blame] | 16 | #include <proto/arg.h> |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 17 | #include <proto/pattern.h> |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 18 | #include <proto/buffers.h> |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 19 | #include <common/standard.h> |
| 20 | |
Willy Tarreau | b4a88f0 | 2012-04-23 21:35:11 +0200 | [diff] [blame] | 21 | /* static sample used in pattern_process() when <p> is NULL */ |
| 22 | static struct sample temp_smp; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 23 | |
| 24 | /* trash chunk used for pattern conversions */ |
| 25 | static struct chunk trash_chunk; |
| 26 | |
| 27 | /* trash buffers used or pattern conversions */ |
| 28 | static char pattern_trash_buf1[BUFSIZE]; |
| 29 | static char pattern_trash_buf2[BUFSIZE]; |
| 30 | |
| 31 | /* pattern_trash_buf point on used buffer*/ |
| 32 | static char *pattern_trash_buf = pattern_trash_buf1; |
| 33 | |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 34 | /* list head of all known pattern fetch keywords */ |
| 35 | static struct pattern_fetch_kw_list pattern_fetches = { |
| 36 | .list = LIST_HEAD_INIT(pattern_fetches.list) |
| 37 | }; |
| 38 | |
| 39 | /* list head of all known pattern format conversion keywords */ |
| 40 | static struct pattern_conv_kw_list pattern_convs = { |
| 41 | .list = LIST_HEAD_INIT(pattern_convs.list) |
| 42 | }; |
| 43 | |
| 44 | /* |
| 45 | * Registers the pattern fetch keyword list <kwl> as a list of valid keywords for next |
| 46 | * parsing sessions. |
| 47 | */ |
| 48 | void pattern_register_fetches(struct pattern_fetch_kw_list *pfkl) |
| 49 | { |
| 50 | LIST_ADDQ(&pattern_fetches.list, &pfkl->list); |
| 51 | } |
| 52 | |
| 53 | /* |
| 54 | * Registers the pattern format coverstion keyword list <pckl> as a list of valid keywords for next |
| 55 | * parsing sessions. |
| 56 | */ |
| 57 | void pattern_register_convs(struct pattern_conv_kw_list *pckl) |
| 58 | { |
| 59 | LIST_ADDQ(&pattern_convs.list, &pckl->list); |
| 60 | } |
| 61 | |
| 62 | /* |
| 63 | * Returns the pointer on pattern fetch keyword structure identified by |
| 64 | * string of <len> in buffer <kw>. |
| 65 | * |
| 66 | */ |
| 67 | struct pattern_fetch *find_pattern_fetch(const char *kw, int len) |
| 68 | { |
| 69 | int index; |
| 70 | struct pattern_fetch_kw_list *kwl; |
| 71 | |
| 72 | list_for_each_entry(kwl, &pattern_fetches.list, list) { |
| 73 | for (index = 0; kwl->kw[index].kw != NULL; index++) { |
| 74 | if (strncmp(kwl->kw[index].kw, kw, len) == 0 && |
| 75 | kwl->kw[index].kw[len] == '\0') |
| 76 | return &kwl->kw[index]; |
| 77 | } |
| 78 | } |
| 79 | return NULL; |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * Returns the pointer on pattern format conversion keyword structure identified by |
| 84 | * string of <len> in buffer <kw>. |
| 85 | * |
| 86 | */ |
| 87 | struct pattern_conv *find_pattern_conv(const char *kw, int len) |
| 88 | { |
| 89 | int index; |
| 90 | struct pattern_conv_kw_list *kwl; |
| 91 | |
| 92 | list_for_each_entry(kwl, &pattern_convs.list, list) { |
| 93 | for (index = 0; kwl->kw[index].kw != NULL; index++) { |
| 94 | if (strncmp(kwl->kw[index].kw, kw, len) == 0 && |
| 95 | kwl->kw[index].kw[len] == '\0') |
| 96 | return &kwl->kw[index]; |
| 97 | } |
| 98 | } |
| 99 | return NULL; |
| 100 | } |
| 101 | |
| 102 | |
| 103 | /* |
| 104 | * Returns a static trash struct chunk to use in pattern casts or format conversions |
| 105 | * Swiths the 2 available trash buffers to protect data during convert |
| 106 | */ |
| 107 | static struct chunk *get_trash_chunk(void) |
| 108 | { |
| 109 | if (pattern_trash_buf == pattern_trash_buf1) |
| 110 | pattern_trash_buf = pattern_trash_buf2; |
| 111 | else |
| 112 | pattern_trash_buf = pattern_trash_buf1; |
| 113 | |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 114 | chunk_init(&trash_chunk, pattern_trash_buf, BUFSIZE); |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 115 | |
| 116 | return &trash_chunk; |
| 117 | } |
| 118 | |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 119 | /******************************************************************/ |
| 120 | /* Pattern casts functions */ |
Willy Tarreau | b8c8f1f | 2012-04-23 22:38:26 +0200 | [diff] [blame] | 121 | /* Note: these functions do *NOT* set the output type on the */ |
| 122 | /* sample, the caller is responsible for doing this on return. */ |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 123 | /******************************************************************/ |
| 124 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 125 | static int c_ip2int(struct sample *smp) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 126 | { |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 127 | smp->data.uint = ntohl(smp->data.ipv4.s_addr); |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 128 | return 1; |
| 129 | } |
| 130 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 131 | static int c_ip2str(struct sample *smp) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 132 | { |
| 133 | struct chunk *trash = get_trash_chunk(); |
| 134 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 135 | if (!inet_ntop(AF_INET, (void *)&smp->data.ipv4, trash->str, trash->size)) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 136 | return 0; |
| 137 | |
| 138 | trash->len = strlen(trash->str); |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 139 | smp->data.str = *trash; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 140 | |
| 141 | return 1; |
| 142 | } |
| 143 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 144 | static int c_ip2ipv6(struct sample *smp) |
David du Colombier | 4f92d32 | 2011-03-24 11:09:31 +0100 | [diff] [blame] | 145 | { |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 146 | v4tov6(&smp->data.ipv6, &smp->data.ipv4); |
David du Colombier | 4f92d32 | 2011-03-24 11:09:31 +0100 | [diff] [blame] | 147 | return 1; |
| 148 | } |
| 149 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 150 | static int c_ipv62str(struct sample *smp) |
David du Colombier | 4f92d32 | 2011-03-24 11:09:31 +0100 | [diff] [blame] | 151 | { |
| 152 | struct chunk *trash = get_trash_chunk(); |
| 153 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 154 | if (!inet_ntop(AF_INET6, (void *)&smp->data.ipv6, trash->str, trash->size)) |
David du Colombier | 4f92d32 | 2011-03-24 11:09:31 +0100 | [diff] [blame] | 155 | return 0; |
| 156 | |
| 157 | trash->len = strlen(trash->str); |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 158 | smp->data.str = *trash; |
David du Colombier | 4f92d32 | 2011-03-24 11:09:31 +0100 | [diff] [blame] | 159 | return 1; |
| 160 | } |
| 161 | |
| 162 | /* |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 163 | static int c_ipv62ip(struct sample *smp) |
David du Colombier | 4f92d32 | 2011-03-24 11:09:31 +0100 | [diff] [blame] | 164 | { |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 165 | return v6tov4(&smp->data.ipv4, &smp->data.ipv6); |
David du Colombier | 4f92d32 | 2011-03-24 11:09:31 +0100 | [diff] [blame] | 166 | } |
| 167 | */ |
| 168 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 169 | static int c_int2ip(struct sample *smp) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 170 | { |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 171 | smp->data.ipv4.s_addr = htonl(smp->data.uint); |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 172 | return 1; |
| 173 | } |
| 174 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 175 | static int c_str2ip(struct sample *smp) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 176 | { |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 177 | if (!buf2ip(smp->data.str.str, smp->data.str.len, &smp->data.ipv4)) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 178 | return 0; |
| 179 | return 1; |
| 180 | } |
| 181 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 182 | static int c_str2ipv6(struct sample *smp) |
David du Colombier | 4f92d32 | 2011-03-24 11:09:31 +0100 | [diff] [blame] | 183 | { |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 184 | return inet_pton(AF_INET6, smp->data.str.str, &smp->data.ipv6); |
David du Colombier | 4f92d32 | 2011-03-24 11:09:31 +0100 | [diff] [blame] | 185 | } |
| 186 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 187 | static int c_int2str(struct sample *smp) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 188 | { |
| 189 | struct chunk *trash = get_trash_chunk(); |
| 190 | char *pos; |
| 191 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 192 | pos = ultoa_r(smp->data.uint, trash->str, trash->size); |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 193 | |
| 194 | if (!pos) |
| 195 | return 0; |
| 196 | |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 197 | trash->size = trash->size - (pos - trash->str); |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 198 | trash->str = pos; |
| 199 | trash->len = strlen(pos); |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 200 | smp->data.str = *trash; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 201 | return 1; |
| 202 | } |
| 203 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 204 | static int c_datadup(struct sample *smp) |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 205 | { |
| 206 | struct chunk *trash = get_trash_chunk(); |
| 207 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 208 | trash->len = smp->data.str.len < trash->size ? smp->data.str.len : trash->size; |
| 209 | memcpy(trash->str, smp->data.str.str, trash->len); |
| 210 | smp->data.str = *trash; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 211 | return 1; |
| 212 | } |
| 213 | |
| 214 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 215 | static int c_none(struct sample *smp) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 216 | { |
| 217 | return 1; |
| 218 | } |
| 219 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 220 | static int c_str2int(struct sample *smp) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 221 | { |
| 222 | int i; |
| 223 | uint32_t ret = 0; |
| 224 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 225 | for (i = 0; i < smp->data.str.len; i++) { |
| 226 | uint32_t val = smp->data.str.str[i] - '0'; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 227 | |
| 228 | if (val > 9) |
| 229 | break; |
| 230 | |
| 231 | ret = ret * 10 + val; |
| 232 | } |
| 233 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 234 | smp->data.uint = ret; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 235 | return 1; |
| 236 | } |
| 237 | |
| 238 | /*****************************************************************/ |
| 239 | /* Pattern casts matrix: */ |
| 240 | /* pattern_casts[from type][to type] */ |
| 241 | /* NULL pointer used for impossible pattern casts */ |
| 242 | /*****************************************************************/ |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 243 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 244 | typedef int (*pattern_cast_fct)(struct sample *smp); |
Willy Tarreau | 422aa07 | 2012-04-20 20:49:27 +0200 | [diff] [blame] | 245 | static pattern_cast_fct pattern_casts[SMP_TYPES][SMP_TYPES] = { |
| 246 | /* to: BOOL UINT SINT IPV4 IPV6 STR BIN CSTR CBIN */ |
| 247 | /* from: BOOL */ { c_none, c_none, c_none, NULL, NULL, NULL, NULL, NULL, NULL }, |
| 248 | /* UINT */ { c_none, c_none, c_none, c_int2ip, NULL, c_int2str, NULL, c_int2str, NULL }, |
| 249 | /* SINT */ { c_none, c_none, c_none, c_int2ip, NULL, c_int2str, NULL, c_int2str, NULL }, |
| 250 | /* IPV4 */ { NULL, c_ip2int, c_ip2int, c_none, c_ip2ipv6, c_ip2str, NULL, c_ip2str, NULL }, |
| 251 | /* IPV6 */ { NULL, NULL, NULL, NULL, c_none, c_ipv62str, NULL, c_ipv62str, NULL }, |
| 252 | /* STR */ { c_str2int, c_str2int, c_str2int, c_str2ip, c_str2ipv6, c_none, c_none, c_none, c_none }, |
| 253 | /* BIN */ { NULL, NULL, NULL, NULL, NULL, NULL, c_none, NULL, c_none }, |
| 254 | /* CSTR */ { c_str2int, c_str2int, c_str2int, c_str2ip, c_str2ipv6, c_datadup, c_datadup, c_none, c_none }, |
| 255 | /* CBIN */ { NULL, NULL, NULL, NULL, NULL, NULL, c_datadup, NULL, c_none }, |
Willy Tarreau | f0b38bf | 2010-06-06 13:22:23 +0200 | [diff] [blame] | 256 | }; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 257 | |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 258 | /* |
| 259 | * Parse a pattern expression configuration: |
| 260 | * fetch keyword followed by format conversion keywords. |
| 261 | * Returns a pointer on allocated pattern expression structure. |
| 262 | */ |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 263 | struct pattern_expr *pattern_parse_expr(char **str, int *idx, char *err, int err_size) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 264 | { |
| 265 | const char *endw; |
| 266 | const char *end; |
| 267 | struct pattern_expr *expr; |
| 268 | struct pattern_fetch *fetch; |
| 269 | struct pattern_conv *conv; |
| 270 | unsigned long prev_type; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 271 | char *p; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 272 | |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 273 | snprintf(err, err_size, "memory error."); |
| 274 | if (!str[*idx]) { |
| 275 | |
| 276 | snprintf(err, err_size, "missing fetch method."); |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 277 | goto out_error; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 278 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 279 | |
| 280 | end = str[*idx] + strlen(str[*idx]); |
| 281 | endw = strchr(str[*idx], '('); |
| 282 | |
| 283 | if (!endw) |
| 284 | endw = end; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 285 | else if ((end-1)[0] != ')') { |
| 286 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 287 | if (p) { |
| 288 | snprintf(err, err_size, "syntax error: missing ')' after keyword '%s'.", p); |
| 289 | free(p); |
| 290 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 291 | goto out_error; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 292 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 293 | |
| 294 | fetch = find_pattern_fetch(str[*idx], endw - str[*idx]); |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 295 | if (!fetch) { |
| 296 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 297 | if (p) { |
| 298 | snprintf(err, err_size, "unknown fetch method '%s'.", p); |
| 299 | free(p); |
| 300 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 301 | goto out_error; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 302 | } |
Willy Tarreau | 422aa07 | 2012-04-20 20:49:27 +0200 | [diff] [blame] | 303 | if (fetch->out_type >= SMP_TYPES) { |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 304 | |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 305 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 306 | if (p) { |
| 307 | snprintf(err, err_size, "returns type of fetch method '%s' is unknown.", p); |
| 308 | free(p); |
| 309 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 310 | goto out_error; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 311 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 312 | |
| 313 | prev_type = fetch->out_type; |
| 314 | expr = calloc(1, sizeof(struct pattern_expr)); |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 315 | if (!expr) |
| 316 | goto out_error; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 317 | |
| 318 | LIST_INIT(&(expr->conv_exprs)); |
| 319 | expr->fetch = fetch; |
| 320 | |
| 321 | if (end != endw) { |
Willy Tarreau | b27c0d3 | 2012-04-20 16:04:47 +0200 | [diff] [blame] | 322 | char *err_msg = NULL; |
| 323 | int err_arg; |
Willy Tarreau | 21d68a6 | 2012-04-20 15:52:36 +0200 | [diff] [blame] | 324 | |
Willy Tarreau | 9fcb984 | 2012-04-20 14:45:49 +0200 | [diff] [blame] | 325 | if (!fetch->arg_mask) { |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 326 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 327 | if (p) { |
| 328 | snprintf(err, err_size, "fetch method '%s' does not support any args.", p); |
| 329 | free(p); |
| 330 | } |
| 331 | goto out_error; |
| 332 | } |
Willy Tarreau | 9fcb984 | 2012-04-20 14:45:49 +0200 | [diff] [blame] | 333 | |
Willy Tarreau | b27c0d3 | 2012-04-20 16:04:47 +0200 | [diff] [blame] | 334 | if (make_arg_list(endw + 1, end - endw - 2, fetch->arg_mask, &expr->arg_p, &err_msg, NULL, &err_arg) < 0) { |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 335 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 336 | if (p) { |
Willy Tarreau | b27c0d3 | 2012-04-20 16:04:47 +0200 | [diff] [blame] | 337 | snprintf(err, err_size, "invalid arg %d in fetch method '%s' : %s.", err_arg+1, p, err_msg); |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 338 | free(p); |
| 339 | } |
Willy Tarreau | b27c0d3 | 2012-04-20 16:04:47 +0200 | [diff] [blame] | 340 | free(err_msg); |
Willy Tarreau | 21d68a6 | 2012-04-20 15:52:36 +0200 | [diff] [blame] | 341 | goto out_error; |
| 342 | } |
| 343 | |
| 344 | if (fetch->val_args && !fetch->val_args(expr->arg_p, &err_msg)) { |
| 345 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 346 | if (p) { |
| 347 | snprintf(err, err_size, "invalid args in fetch method '%s' : %s.", p, err_msg); |
| 348 | free(p); |
| 349 | } |
| 350 | free(err_msg); |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 351 | goto out_error; |
| 352 | } |
| 353 | } |
Willy Tarreau | 9fcb984 | 2012-04-20 14:45:49 +0200 | [diff] [blame] | 354 | else if (fetch->arg_mask) { |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 355 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 356 | if (p) { |
| 357 | snprintf(err, err_size, "missing args for fetch method '%s'.", p); |
| 358 | free(p); |
| 359 | } |
| 360 | goto out_error; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | for (*idx += 1; *(str[*idx]); (*idx)++) { |
| 364 | struct pattern_conv_expr *conv_expr; |
| 365 | |
| 366 | end = str[*idx] + strlen(str[*idx]); |
| 367 | endw = strchr(str[*idx], '('); |
| 368 | |
| 369 | if (!endw) |
| 370 | endw = end; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 371 | else if ((end-1)[0] != ')') { |
| 372 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 373 | if (p) { |
| 374 | snprintf(err, err_size, "syntax error, missing ')' after keyword '%s'.", p); |
| 375 | free(p); |
| 376 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 377 | goto out_error; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 378 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 379 | |
| 380 | conv = find_pattern_conv(str[*idx], endw - str[*idx]); |
| 381 | if (!conv) |
| 382 | break; |
| 383 | |
Willy Tarreau | 422aa07 | 2012-04-20 20:49:27 +0200 | [diff] [blame] | 384 | if (conv->in_type >= SMP_TYPES || |
| 385 | conv->out_type >= SMP_TYPES) { |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 386 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 387 | if (p) { |
| 388 | snprintf(err, err_size, "returns type of conv method '%s' is unknown.", p); |
| 389 | free(p); |
| 390 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 391 | goto out_error; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 392 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 393 | |
| 394 | /* If impossible type conversion */ |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 395 | if (!pattern_casts[prev_type][conv->in_type]) { |
| 396 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 397 | if (p) { |
| 398 | snprintf(err, err_size, "conv method '%s' cannot be applied.", p); |
| 399 | free(p); |
| 400 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 401 | goto out_error; |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 402 | } |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 403 | |
| 404 | prev_type = conv->out_type; |
| 405 | conv_expr = calloc(1, sizeof(struct pattern_conv_expr)); |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 406 | if (!conv_expr) |
| 407 | goto out_error; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 408 | |
| 409 | LIST_ADDQ(&(expr->conv_exprs), &(conv_expr->list)); |
| 410 | conv_expr->conv = conv; |
| 411 | |
| 412 | if (end != endw) { |
Willy Tarreau | b27c0d3 | 2012-04-20 16:04:47 +0200 | [diff] [blame] | 413 | char *err_msg = NULL; |
| 414 | int err_arg; |
Willy Tarreau | 21d68a6 | 2012-04-20 15:52:36 +0200 | [diff] [blame] | 415 | |
Willy Tarreau | 9fcb984 | 2012-04-20 14:45:49 +0200 | [diff] [blame] | 416 | if (!conv->arg_mask) { |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 417 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 418 | |
| 419 | if (p) { |
| 420 | snprintf(err, err_size, "conv method '%s' does not support any args.", p); |
| 421 | free(p); |
| 422 | } |
| 423 | goto out_error; |
| 424 | } |
Willy Tarreau | 9e92d32 | 2010-01-26 17:58:06 +0100 | [diff] [blame] | 425 | |
Willy Tarreau | b27c0d3 | 2012-04-20 16:04:47 +0200 | [diff] [blame] | 426 | if (make_arg_list(endw + 1, end - endw - 2, conv->arg_mask, &conv_expr->arg_p, &err_msg, NULL, &err_arg) < 0) { |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 427 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 428 | if (p) { |
Willy Tarreau | b27c0d3 | 2012-04-20 16:04:47 +0200 | [diff] [blame] | 429 | snprintf(err, err_size, "invalid arg %d in conv method '%s' : %s.", err_arg+1, p, err_msg); |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 430 | free(p); |
| 431 | } |
Willy Tarreau | b27c0d3 | 2012-04-20 16:04:47 +0200 | [diff] [blame] | 432 | free(err_msg); |
Willy Tarreau | 21d68a6 | 2012-04-20 15:52:36 +0200 | [diff] [blame] | 433 | goto out_error; |
| 434 | } |
| 435 | |
| 436 | if (conv->val_args && !conv->val_args(conv_expr->arg_p, &err_msg)) { |
| 437 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 438 | if (p) { |
| 439 | snprintf(err, err_size, "invalid args in conv method '%s' : %s.", p, err_msg); |
| 440 | free(p); |
| 441 | } |
| 442 | free(err_msg); |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 443 | goto out_error; |
| 444 | } |
| 445 | } |
Willy Tarreau | 9fcb984 | 2012-04-20 14:45:49 +0200 | [diff] [blame] | 446 | else if (conv->arg_mask) { |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 447 | p = my_strndup(str[*idx], endw - str[*idx]); |
| 448 | if (p) { |
| 449 | snprintf(err, err_size, "missing args for conv method '%s'.", p); |
Willy Tarreau | 9e92d32 | 2010-01-26 17:58:06 +0100 | [diff] [blame] | 450 | free(p); |
Willy Tarreau | 9e92d32 | 2010-01-26 17:58:06 +0100 | [diff] [blame] | 451 | } |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 452 | goto out_error; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 453 | } |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 454 | |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 455 | } |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 456 | |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 457 | return expr; |
| 458 | |
| 459 | out_error: |
| 460 | /* TODO: prune_pattern_expr(expr); */ |
| 461 | return NULL; |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * Process a fetch + format conversion of defined by the pattern expression <expr> |
Willy Tarreau | 32a6f2e | 2012-04-25 10:13:36 +0200 | [diff] [blame^] | 466 | * on request or response considering the <opt> parameter. |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 467 | * Returns a pointer on a typed pattern structure containing the result or NULL if |
| 468 | * pattern is not found or when format conversion failed. |
| 469 | * If <p> is not null, function returns results in structure pointed by <p>. |
| 470 | * If <p> is null, functions returns a pointer on a static pattern structure. |
Willy Tarreau | b8c8f1f | 2012-04-23 22:38:26 +0200 | [diff] [blame] | 471 | * |
| 472 | * Note: the fetch functions are required to properly set the return type. The |
| 473 | * conversion functions must do so too. However the cast functions do not need |
| 474 | * to since they're made to cast mutiple types according to what is required. |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 475 | */ |
Willy Tarreau | 32a6f2e | 2012-04-25 10:13:36 +0200 | [diff] [blame^] | 476 | struct sample *pattern_process(struct proxy *px, struct session *l4, void *l7, |
| 477 | unsigned int opt, |
Willy Tarreau | b4a88f0 | 2012-04-23 21:35:11 +0200 | [diff] [blame] | 478 | struct pattern_expr *expr, struct sample *p) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 479 | { |
| 480 | struct pattern_conv_expr *conv_expr; |
| 481 | |
| 482 | if (p == NULL) |
Willy Tarreau | b4a88f0 | 2012-04-23 21:35:11 +0200 | [diff] [blame] | 483 | p = &temp_smp; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 484 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 485 | p->flags = 0; |
Willy Tarreau | 32a6f2e | 2012-04-25 10:13:36 +0200 | [diff] [blame^] | 486 | if (!expr->fetch->process(px, l4, l7, opt, expr->arg_p, p)) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 487 | return NULL; |
| 488 | |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 489 | list_for_each_entry(conv_expr, &expr->conv_exprs, list) { |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 490 | if (!pattern_casts[p->type][conv_expr->conv->in_type](p)) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 491 | return NULL; |
| 492 | |
Willy Tarreau | b8c8f1f | 2012-04-23 22:38:26 +0200 | [diff] [blame] | 493 | /* force the output type after a cast */ |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 494 | p->type = conv_expr->conv->in_type; |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 495 | if (!conv_expr->conv->process(conv_expr->arg_p, p)) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 496 | return NULL; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 497 | } |
| 498 | return p; |
| 499 | } |
| 500 | |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 501 | /*****************************************************************/ |
| 502 | /* Pattern format convert functions */ |
Willy Tarreau | b8c8f1f | 2012-04-23 22:38:26 +0200 | [diff] [blame] | 503 | /* These functions set the data type on return. */ |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 504 | /*****************************************************************/ |
| 505 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 506 | static int pattern_conv_str2lower(const struct arg *arg_p, struct sample *smp) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 507 | { |
| 508 | int i; |
| 509 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 510 | if (!smp->data.str.size) |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 511 | return 0; |
| 512 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 513 | for (i = 0; i < smp->data.str.len; i++) { |
| 514 | if ((smp->data.str.str[i] >= 'A') && (smp->data.str.str[i] <= 'Z')) |
| 515 | smp->data.str.str[i] += 'a' - 'A'; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 516 | } |
Willy Tarreau | b8c8f1f | 2012-04-23 22:38:26 +0200 | [diff] [blame] | 517 | smp->type = SMP_T_STR; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 518 | return 1; |
| 519 | } |
| 520 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 521 | static int pattern_conv_str2upper(const struct arg *arg_p, struct sample *smp) |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 522 | { |
| 523 | int i; |
| 524 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 525 | if (!smp->data.str.size) |
Emeric Brun | 485479d | 2010-09-23 18:02:19 +0200 | [diff] [blame] | 526 | return 0; |
| 527 | |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 528 | for (i = 0; i < smp->data.str.len; i++) { |
| 529 | if ((smp->data.str.str[i] >= 'a') && (smp->data.str.str[i] <= 'z')) |
| 530 | smp->data.str.str[i] += 'A' - 'a'; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 531 | } |
Willy Tarreau | b8c8f1f | 2012-04-23 22:38:26 +0200 | [diff] [blame] | 532 | smp->type = SMP_T_STR; |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 533 | return 1; |
| 534 | } |
| 535 | |
Willy Tarreau | f995410 | 2012-04-20 14:03:29 +0200 | [diff] [blame] | 536 | /* takes the netmask in arg_p */ |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 537 | static int pattern_conv_ipmask(const struct arg *arg_p, struct sample *smp) |
Willy Tarreau | d31d6eb | 2010-01-26 18:01:41 +0100 | [diff] [blame] | 538 | { |
Willy Tarreau | 342acb4 | 2012-04-23 22:03:39 +0200 | [diff] [blame] | 539 | smp->data.ipv4.s_addr &= arg_p->data.ipv4.s_addr; |
Willy Tarreau | b8c8f1f | 2012-04-23 22:38:26 +0200 | [diff] [blame] | 540 | smp->type = SMP_T_IPV4; |
Willy Tarreau | d31d6eb | 2010-01-26 18:01:41 +0100 | [diff] [blame] | 541 | return 1; |
| 542 | } |
| 543 | |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 544 | /* Note: must not be declared <const> as its list will be overwritten */ |
| 545 | static struct pattern_conv_kw_list pattern_conv_kws = {{ },{ |
Willy Tarreau | 422aa07 | 2012-04-20 20:49:27 +0200 | [diff] [blame] | 546 | { "upper", pattern_conv_str2upper, 0, NULL, SMP_T_STR, SMP_T_STR }, |
| 547 | { "lower", pattern_conv_str2lower, 0, NULL, SMP_T_STR, SMP_T_STR }, |
| 548 | { "ipmask", pattern_conv_ipmask, ARG1(1,MSK4), NULL, SMP_T_IPV4, SMP_T_IPV4 }, |
Willy Tarreau | 9fcb984 | 2012-04-20 14:45:49 +0200 | [diff] [blame] | 549 | { NULL, NULL, 0, 0, 0 }, |
Emeric Brun | 107ca30 | 2010-01-04 16:16:05 +0100 | [diff] [blame] | 550 | }}; |
| 551 | |
| 552 | __attribute__((constructor)) |
| 553 | static void __pattern_init(void) |
| 554 | { |
| 555 | /* register pattern format convert keywords */ |
| 556 | pattern_register_convs(&pattern_conv_kws); |
| 557 | } |