* Exim - an Internet mail transport agent *
*************************************************/
+/* Copyright (c) The Exim Maintainers 2020 - 2022 */
/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "../exim.h"
#include "lf_functions.h"
/* See local README for interface description. */
static void *
-dnsdb_open(uschar *filename, uschar **errmsg)
+dnsdb_open(const uschar * filename, uschar **errmsg)
{
-filename = filename; /* Keep picky compilers happy */
-errmsg = errmsg; /* Ditto */
return (void *)(-1); /* Any non-0 value */
}
causes the whole lookup to defer only if none of the DNS queries succeeds; and
'never', where all defers are as if the lookup failed. The default is 'lax'.
-- 'dnssec_FOO', with 'strict', 'lax' and 'never' (default). The meanings are
+- 'dnssec_FOO', with 'strict', 'lax' (default), and 'never'. The meanings are
require, try and don't-try dnssec respectively.
- 'retrans_VAL', set the timeout value. VAL is an Exim time specification
separator, as always, is colon. */
static int
-dnsdb_find(void *handle, uschar *filename, const uschar *keystring, int length,
- uschar **result, uschar **errmsg, uint *do_cache)
+dnsdb_find(void * handle, const uschar * filename, const uschar * keystring,
+ int length, uschar ** result, uschar ** errmsg, uint * do_cache,
+ const uschar * opts)
{
int rc;
int sep = 0;
int defer_mode = PASS;
-int dnssec_mode = OK;
+int dnssec_mode = PASS;
int save_retrans = dns_retrans;
int save_retry = dns_retry;
int type;
gstring * yield = string_get(256);
-handle = handle; /* Keep picky compilers happy */
-filename = filename;
-length = length;
-do_cache = do_cache;
-
/* If the string starts with '>' we change the output separator.
If it's followed by ';' or ',' we set the TXT output separator. */
else
{
*errmsg = US"unsupported dnsdb defer behaviour";
- return DEFER;
+ rc = DEFER;
+ goto out;
}
}
else if (strncmpic(keystring, US"dnssec_", 7) == 0)
else
{
*errmsg = US"unsupported dnsdb dnssec behaviour";
- return DEFER;
+ rc = DEFER;
+ goto out;
}
}
else if (strncmpic(keystring, US"retrans_", 8) == 0)
if ((timeout_sec = readconf_readtime(keystring += 8, ',', FALSE)) <= 0)
{
*errmsg = US"unsupported dnsdb timeout value";
- return DEFER;
+ rc = DEFER;
+ goto out;
}
dns_retrans = timeout_sec;
while (*keystring != ',') keystring++;
if ((retries = (int)strtol(CCS keystring + 6, CSS &keystring, 0)) < 0)
{
*errmsg = US"unsupported dnsdb retry count";
- return DEFER;
+ rc = DEFER;
+ goto out;
}
dns_retry = retries;
}
if (*keystring++ != ',')
{
*errmsg = US"dnsdb modifier syntax error";
- return DEFER;
+ rc = DEFER;
+ goto out;
}
while (isspace(*keystring)) keystring++;
}
if (i >= nelem(type_names))
{
*errmsg = US"unsupported DNS record type";
- return DEFER;
+ rc = DEFER;
+ goto out;
}
keystring = equals + 1;
while ((domain = string_nextinlist(&keystring, &sep, NULL, 0)))
{
- uschar rbuffer[256];
int searchtype = type == T_CSA ? T_SRV : /* record type we want */
type == T_MXH ? T_MX :
type == T_ZNS ? T_NS : type;
if ((type == T_PTR || type == T_CSA) &&
string_is_ip_address(domain, NULL) != 0)
- {
- dns_build_reverse(domain, rbuffer);
- domain = rbuffer;
- }
+ domain = dns_build_reverse(domain);
do
{
dns_retrans = save_retrans;
dns_retry = save_retry;
dns_init(FALSE, FALSE, FALSE); /* clr dnssec bit */
- return DEFER; /* always defer */
+ rc = DEFER; /* always defer */
+ goto out;
}
if (defer_mode == PASS) failrc = DEFER; /* defer only if all do */
continue; /* treat defer as fail */
dns_retry = save_retry;
dns_init(FALSE, FALSE, FALSE); /* clear the dnssec bit for getaddrbyname */
-if (!yield || !yield->ptr) return failrc;
+if (!yield || !yield->ptr)
+ rc = failrc;
+else
+ {
+ *result = string_from_gstring(yield);
+ rc = OK;
+ }
+
+out:
-*result = string_from_gstring(yield);
-return OK;
+store_free_dns_answer(dnsa);
+return rc;
}
#include "../version.h"
-void
-dnsdb_version_report(FILE *f)
+gstring *
+dnsdb_version_report(gstring * g)
{
#ifdef DYNLOOKUP
-fprintf(f, "Library version: DNSDB: Exim version %s\n", EXIM_VERSION_STR);
+g = string_fmt_append(g, "Library version: DNSDB: Exim version %s\n", EXIM_VERSION_STR);
#endif
+return g;
}
static lookup_info _lookup_info = {
- US"dnsdb", /* lookup name */
- lookup_querystyle, /* query style */
- dnsdb_open, /* open function */
- NULL, /* check function */
- dnsdb_find, /* find function */
- NULL, /* no close function */
- NULL, /* no tidy function */
- NULL, /* no quoting function */
- dnsdb_version_report /* version reporting */
+ .name = US"dnsdb", /* lookup name */
+ .type = lookup_querystyle, /* query style */
+ .open = dnsdb_open, /* open function */
+ .check = NULL, /* check function */
+ .find = dnsdb_find, /* find function */
+ .close = NULL, /* no close function */
+ .tidy = NULL, /* no tidy function */
+ .quote = NULL, /* no quoting function */
+ .version_report = dnsdb_version_report /* version reporting */
};
#ifdef DYNLOOKUP
git://git.exim.org / exim.git / blobdiff