/* If we have failed to find a name, return FAIL and log when required.
NB host_lookup_msg must be in permanent store. */
-if (sender_host_name == NULL)
+if (!sender_host_name)
{
if (host_checking || !f.log_testing_mode)
log_write(L_host_lookup_failed, LOG_MAIN, "no host name found for IP "
{
int rc;
BOOL ok = FALSE;
- host_item h;
- dnssec_domains d;
-
- h.next = NULL;
- h.name = hname;
- h.mx = MX_NONE;
- h.address = NULL;
- d.request = sender_host_dnssec ? US"*" : NULL;;
- d.require = NULL;
+ host_item h = { .next = NULL, .name = hname, .mx = MX_NONE, .address = NULL };
+ dnssec_domains d =
+ { .request = sender_host_dnssec ? US"*" : NULL, .require = NULL };
if ( (rc = host_find_bydns(&h, NULL, HOST_FIND_BY_A | HOST_FIND_BY_AAAA,
NULL, NULL, NULL, &d, NULL, NULL)) == HOST_FOUND
assume TCP protocol. DNS domain names are constrained to a maximum of 256
characters, so the code below should be safe. */
-if ((whichrrs & HOST_FIND_BY_SRV) != 0)
+if (whichrrs & HOST_FIND_BY_SRV)
{
- uschar buffer[300];
- uschar *temp_fully_qualified_name = buffer;
+ gstring * g;
+ uschar * temp_fully_qualified_name;
int prefix_length;
- (void)sprintf(CS buffer, "_%s._tcp.%n%.256s", srv_service, &prefix_length,
- host->name);
+ g = string_fmt_append(NULL, "_%s._tcp.%n%.256s",
+ srv_service, &prefix_length, host->name);
+ temp_fully_qualified_name = string_from_gstring(g);
ind_type = T_SRV;
/* Search for SRV records. If the fully qualified name is different to
dnssec = DS_UNK;
lookup_dnssec_authenticated = NULL;
- rc = dns_lookup_timerwrap(&dnsa, buffer, ind_type, CUSS &temp_fully_qualified_name);
+ rc = dns_lookup_timerwrap(&dnsa, temp_fully_qualified_name, ind_type,
+ CUSS &temp_fully_qualified_name);
DEBUG(D_dns)
if ((dnssec_request || dnssec_require)
{ dnssec = DS_NO; lookup_dnssec_authenticated = US"no"; }
}
- if (temp_fully_qualified_name != buffer && fully_qualified_name != NULL)
+ if (temp_fully_qualified_name != g->s && fully_qualified_name != NULL)
*fully_qualified_name = temp_fully_qualified_name + prefix_length;
/* On DNS failures, we give the "try again" error unless the domain is