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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2003-2019 Free Software Foundation, Inc.
GNU Mailutils 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; either version 3, or (at your option)
any later version.
GNU Mailutils 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 GNU Mailutils. If not, see
<http://www.gnu.org/licenses/>. */
/* Implements "list" sieve extension test. See "Syntax:" below for the
description */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <mailutils/sieve.h>
/* Auxiliary functions */
struct header_closure
{
mu_header_t header; /* Message header */
int index; /* Header index */
char *delim; /* List delimiter */
char **valv; /* Retrieved and split-out header values */
size_t valc; /* Number of values in valv */
size_t vali; /* Current index in valv */
};
static void
cleanup (struct header_closure *hc)
{
mu_argcv_free (hc->valc, hc->valv);
hc->valv = NULL;
hc->valc = hc->vali = 0;
}
static int
retrieve_next_header (struct header_closure *hc, char *name, char **pval)
{
const char *buf;
cleanup (hc);
while (!mu_header_sget_field_name (hc->header, hc->index, &buf))
{
int i = hc->index++;
if (mu_c_strcasecmp (buf, name) == 0)
{
const char *value;
struct mu_wordsplit ws;
if (mu_header_sget_field_value (hc->header, i, &value))
return 1;
ws.ws_delim = hc->delim;
if (mu_wordsplit (value, &ws,
MU_WRDSF_DELIM|MU_WRDSF_SQUEEZE_DELIMS|
MU_WRDSF_WS|
MU_WRDSF_NOVAR|MU_WRDSF_NOCMD))
{
mu_error (_("cannot split line `%s': %s"), value,
mu_wordsplit_strerror (&ws));
return 1;
}
if (ws.ws_wordc == 0)
{
cleanup (hc);
mu_wordsplit_free (&ws);
return 1;
}
mu_wordsplit_get_words (&ws, &hc->valc, &hc->valv);
mu_wordsplit_free (&ws);
hc->vali = 0;
*pval = hc->valv[hc->vali++];
return 0;
}
}
return 1;
}
static int
list_retrieve_header (void *item, void *data, size_t idx, char **pval)
{
struct header_closure *hc = data;
char *p;
if (idx == 0)
hc->index = 1;
while (1)
{
if (!hc->valv)
{
if (retrieve_next_header (hc, (char*) item, &p))
return MU_ERR_NOENT;
}
else if (hc->vali == hc->valc)
{
cleanup (hc);
continue;
}
else
p = hc->valv[hc->vali++];
if ((*pval = strdup (p)) == NULL)
return errno;
return 0;
}
return MU_ERR_NOENT;
}
/* The test proper */
/* Syntax: list [COMPARATOR] [MATCH-TYPE]
[ :delim <delimiters: string> ]
<headers: string-list> <key-list: string-list>
The "list" test evaluates to true if any of the headers
match any key. Each header is regarded as containing a
list of keywords. By default, comma is assumed as list
separator. This can be overridden by specifying ":delim"
tag, whose value is a string consisting of valid list
delimiter characters.
list :matches :delim " ," [ "X-Spam-Keywords", "X-Spamd-Keywords" ]
[ "HTML_*", "FORGED_*" ]
*/
static int
list_test (mu_sieve_machine_t mach)
{
mu_sieve_value_t *h, *v;
struct header_closure clos;
int result;
memset (&clos, 0, sizeof clos);
if (!mu_sieve_get_tag (mach, "delim", SVT_STRING, &clos.delim))
clos.delim = ",";
h = mu_sieve_get_arg_untyped (mach, 0);
v = mu_sieve_get_arg_untyped (mach, 1);
mu_message_get_header (mu_sieve_get_message (mach), &clos.header);
result = mu_sieve_vlist_compare (mach, h, v, list_retrieve_header, NULL,
&clos);
cleanup (&clos);
return result;
}
/* Initialization */
/* Required arguments: */
static mu_sieve_data_type list_req_args[] = {
SVT_STRING_LIST,
SVT_STRING_LIST,
SVT_VOID
};
static mu_sieve_tag_def_t match_part_tags[] = {
{ "is", SVT_VOID },
{ "contains", SVT_VOID },
{ "matches", SVT_VOID },
{ "regex", SVT_VOID },
{ "count", SVT_STRING },
{ "value", SVT_STRING },
{ "comparator", SVT_STRING },
{ NULL }
};
static mu_sieve_tag_def_t delim_part_tags[] = {
{ "delim", SVT_STRING },
{ NULL }
};
static mu_sieve_tag_group_t list_tag_groups[] = {
{ match_part_tags, mu_sieve_match_part_checker },
{ delim_part_tags, NULL },
{ NULL }
};
/* Initialization function. */
int
SIEVE_EXPORT(list,init) (mu_sieve_machine_t mach)
{
mu_sieve_register_test (mach, "list", list_test,
list_req_args, list_tag_groups, 1);
return 0;
}
/* End of list.c */
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