X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/8768d5483a5894400ae1f70cda1beb44ed9b087c..d12746bc15d83ab821be36975da0179672708bc1:/src/src/host.c

diff --git a/src/src/host.c b/src/src/host.c
index 0da99334a..c3694c047 100644
--- a/src/src/host.c
+++ b/src/src/host.c
@@ -1796,7 +1796,7 @@ while ((ordername = string_nextinlist(&list, &sep, buffer, sizeof(buffer))))
 /* 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 "
@@ -1832,15 +1832,9 @@ for (hname = sender_host_name; hname; hname = *aliases++)
   {
   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
@@ -2598,14 +2592,15 @@ f.host_find_failed_syntax = FALSE;
 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
@@ -2614,7 +2609,8 @@ if ((whichrrs & HOST_FIND_BY_SRV) != 0)
 
   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)
@@ -2630,7 +2626,7 @@ if ((whichrrs & HOST_FIND_BY_SRV) != 0)
       { 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