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039f3a3495
lib/zebra.h has FILTER_X #define's. These do not belong there. Put them in lib/filter.h where they belong. Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> (cherry picked from commit 0490729cc033a3483fc6b0ed45085ee249cac779)
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/* AS regular expression routine
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Copyright (C) 1999 Kunihiro Ishiguro
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This file is part of GNU Zebra.
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GNU Zebra is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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GNU Zebra is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Zebra; see the file COPYING. If not, write to the Free
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#include <zebra.h>
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#include "log.h"
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#include "command.h"
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#include "memory.h"
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#include "queue.h"
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#include "filter.h"
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#include "bgpd.h"
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#include "bgp_aspath.h"
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#include "bgp_regex.h"
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/* Character `_' has special mean. It represents [,{}() ] and the
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beginning of the line(^) and the end of the line ($).
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(^|[,{}() ]|$) */
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regex_t *
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bgp_regcomp (const char *regstr)
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{
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/* Convert _ character to generic regular expression. */
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int i, j;
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int len;
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int magic = 0;
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char *magic_str;
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char magic_regexp[] = "(^|[,{}() ]|$)";
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int ret;
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regex_t *regex;
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len = strlen (regstr);
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for (i = 0; i < len; i++)
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if (regstr[i] == '_')
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magic++;
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magic_str = XMALLOC (MTYPE_TMP, len + (14 * magic) + 1);
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for (i = 0, j = 0; i < len; i++)
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{
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if (regstr[i] == '_')
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{
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memcpy (magic_str + j, magic_regexp, strlen (magic_regexp));
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j += strlen (magic_regexp);
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}
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else
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magic_str[j++] = regstr[i];
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}
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magic_str[j] = '\0';
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regex = XMALLOC (MTYPE_BGP_REGEXP, sizeof (regex_t));
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ret = regcomp (regex, magic_str, REG_EXTENDED|REG_NOSUB);
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XFREE (MTYPE_TMP, magic_str);
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if (ret != 0)
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{
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XFREE (MTYPE_BGP_REGEXP, regex);
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return NULL;
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}
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return regex;
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}
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int
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bgp_regexec (regex_t *regex, struct aspath *aspath)
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{
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return regexec (regex, aspath->str, 0, NULL, 0);
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}
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void
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bgp_regex_free (regex_t *regex)
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{
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regfree (regex);
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XFREE (MTYPE_BGP_REGEXP, regex);
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}
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