DMARC: Use exim facilities for DNS lookups

[user/henk/code/exim.git] / src / src / verify.c

diff --git a/src/src/verify.c b/src/src/verify.c
index 5026a417cea16d28753b367efc74b22f503d9da4..84c582cfa340dcee53ba731ee9b4c7f5c3ed50ef 100644 (file)
--- a/src/src/verify.c
+++ b/src/src/verify.c
@@ -98,7 +98,7 @@ if (type[0] == 'd' && cache_record->result != ccache_reject)
   {
   if (length == sizeof(dbdata_callout_cache_obs))
     {
-    dbdata_callout_cache *new = store_get(sizeof(dbdata_callout_cache));
+    dbdata_callout_cache *new = store_get(sizeof(dbdata_callout_cache), FALSE);
     memcpy(new, cache_record, length);
     new->postmaster_stamp = new->random_stamp = new->time_stamp;
     cache_record = new;
@@ -420,7 +420,7 @@ if (addr->transport == cutthrough.addr.transport)
 
        if (done)
          {
-         address_item * na = store_get(sizeof(address_item));
+         address_item * na = store_get(sizeof(address_item), FALSE);
          *na = cutthrough.addr;
          cutthrough.addr = *addr;
          cutthrough.addr.host_used = &cutthrough.host;
@@ -976,8 +976,7 @@ no_conn:
        {
        extern int acl_where;   /* src/acl.c */
        errno = 0;
-       addr->message = string_sprintf(
-           "response to \"EHLO\" did not include SMTPUTF8");
+       addr->message = US"response to \"EHLO\" did not include SMTPUTF8";
        addr->user_message = acl_where == ACL_WHERE_RCPT
          ? US"533 no support for internationalised mailbox name"
          : US"550 mailbox unavailable";
@@ -1002,6 +1001,26 @@ no_conn:
          string_sprintf("response to \"%s\" was: %s",
                          big_buffer, string_printing(sx.buffer));
 
+       /* RFC 5321 section 4.2: the text portion of the response may have only
+       HT, SP, Printable US-ASCII.  Deal with awkward chars by cutting the
+       received message off before passing it onward.  Newlines are ok; they
+       just become a multiline response (but wrapped in the error code we
+       produce). */
+
+       for (uschar * s = sx.buffer;
+            *s && s < sx.buffer + sizeof(sx.buffer);
+            s++)
+         {
+         uschar c = *s;
+         if (c != '\t' && c != '\n' && (c < ' ' || c > '~'))
+           {
+           if (s - sx.buffer < sizeof(sx.buffer) - 12)
+             memcpy(s, "(truncated)", 12);
+           else
+             *s = '\0';
+           break;
+           }
+         }
        addr->user_message = options & vopt_is_recipient
          ? string_sprintf("Callout verification failed:\n%s", sx.buffer)
          : string_sprintf("Called:   %s\nSent:     %s\nResponse: %s",
@@ -1089,7 +1108,7 @@ no_conn:
       for (address_item * caddr = &cutthrough.addr, * parent = addr->parent;
           parent;
           caddr = caddr->parent, parent = parent->parent)
-        *(caddr->parent = store_get(sizeof(address_item))) = *parent;
+        *(caddr->parent = store_get(sizeof(address_item), FALSE)) = *parent;
 
       ctctx.outblock.buffer = ctbuffer;
       ctctx.outblock.buffersize = sizeof(ctbuffer);
@@ -1173,7 +1192,7 @@ if (!done)
 /* Come here from within the cache-reading code on fast-track exit. */
 
 END_CALLOUT:
-tls_modify_variables(&tls_in);
+tls_modify_variables(&tls_in); /* return variables to inbound values */
 return yield;
 }
 
@@ -1529,6 +1548,8 @@ if (addr != vaddr)
   vaddr->basic_errno = addr->basic_errno;
   vaddr->more_errno = addr->more_errno;
   vaddr->prop.address_data = addr->prop.address_data;
+  vaddr->prop.variables = NULL;
+  tree_dup((tree_node **)&vaddr->prop.variables, addr->prop.variables);
   copyflag(vaddr, addr, af_pass_message);
   }
 return yield;
@@ -2089,6 +2110,8 @@ while (addr_new)
       of $address_data to be that of the child */
 
       vaddr->prop.address_data = addr->prop.address_data;
+      vaddr->prop.variables = NULL;
+      tree_dup((tree_node **)&vaddr->prop.variables, addr->prop.variables);
 
       /* If stopped because more than one new address, cannot cutthrough */
 
@@ -2190,7 +2213,7 @@ the -bv or -bt case). */
 
 out:
 verify_mode = NULL;
-tls_modify_variables(&tls_in);
+tls_modify_variables(&tls_in); /* return variables to inbound values */
 
 return yield;
 }
@@ -2346,7 +2369,7 @@ for (header_line * h = header_list; h; h = h->next)
     if ((*s < 33) || (*s > 126))
       {
       *msgptr = string_sprintf("Invalid character in header \"%.*s\" found",
-                            colon - h->text, h->text);
+                            (int)(colon - h->text), h->text);
       return FAIL;
       }
   }
@@ -3348,7 +3371,7 @@ one_check_dnsbl(uschar *domain, uschar *domain_txt, uschar *keydomain,
   uschar *prepend, uschar *iplist, BOOL bitmask, int match_type,
   int defer_return)
 {
-dns_answer dnsa;
+dns_answer * dnsa = store_get_dns_answer();
 dns_scan dnss;
 tree_node *t;
 dnsbl_cache_block *cb;
@@ -3392,16 +3415,16 @@ else
 
   else
     {  /* Set up a tree entry to cache the lookup */
-    t = store_get(sizeof(tree_node) + Ustrlen(query));
+    t = store_get(sizeof(tree_node) + Ustrlen(query), is_tainted(query));
     Ustrcpy(t->name, query);
-    t->data.ptr = cb = store_get(sizeof(dnsbl_cache_block));
+    t->data.ptr = cb = store_get(sizeof(dnsbl_cache_block), FALSE);
     (void)tree_insertnode(&dnsbl_cache, t);
     }
 
   /* Do the DNS lookup . */
 
   HDEBUG(D_dnsbl) debug_printf("new DNS lookup for %s\n", query);
-  cb->rc = dns_basic_lookup(&dnsa, query, T_A);
+  cb->rc = dns_basic_lookup(dnsa, query, T_A);
   cb->text_set = FALSE;
   cb->text = NULL;
   cb->rhs = NULL;
@@ -3421,11 +3444,11 @@ else
   if (cb->rc == DNS_SUCCEED)
     {
     dns_address ** addrp = &(cb->rhs);
-    for (dns_record * rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS); rr;
-         rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT))
+    for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS); rr;
+         rr = dns_next_rr(dnsa, &dnss, RESET_NEXT))
       if (rr->type == T_A)
         {
-        dns_address *da = dns_address_from_rr(&dnsa, rr);
+        dns_address *da = dns_address_from_rr(dnsa, rr);
         if (da)
           {
           *addrp = da;
@@ -3573,9 +3596,9 @@ if (cb->rc == DNS_SUCCEED)
   if (!cb->text_set)
     {
     cb->text_set = TRUE;
-    if (dns_basic_lookup(&dnsa, query, T_TXT) == DNS_SUCCEED)
-      for (dns_record * rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS); rr;
-           rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT))
+    if (dns_basic_lookup(dnsa, query, T_TXT) == DNS_SUCCEED)
+      for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS); rr;
+           rr = dns_next_rr(dnsa, &dnss, RESET_NEXT))
         if (rr->type == T_TXT)
          {
          int len = (rr->data)[0];