Clip DNS TTL values once in event callback

This change ensures that other parts of the code base always operate on
the same clipped TTL values, notably without being aware of clipping.

diff --git a/src/core/or/connection_edge.c b/src/core/or/connection_edge.c
index d9067d5c29f9cffb5a7427ddf91b6cb7023fa4d0..b96f4eb211cb6bd4b7085719adc86aee03101e60 100644 (file)
--- a/src/core/or/connection_edge.c
+++ b/src/core/or/connection_edge.c
@@ -546,7 +546,7 @@ connection_edge_end(edge_connection_t *conn, uint8_t reason)
       memcpy(payload+1, tor_addr_to_in6_addr8(&conn->base_.addr), 16);
       addrlen = 16;
     }
-    set_uint32(payload+1+addrlen, htonl(clip_dns_ttl(conn->address_ttl)));
+    set_uint32(payload+1+addrlen, htonl(conn->address_ttl));
     payload_len += 4+addrlen;
   }
 
@@ -911,7 +911,7 @@ connected_cell_format_payload(uint8_t *payload_out,
     return -1;
   }
 
-  set_uint32(payload_out + connected_payload_len, htonl(clip_dns_ttl(ttl)));
+  set_uint32(payload_out + connected_payload_len, htonl(ttl));
   connected_payload_len += 4;
 
   tor_assert(connected_payload_len <= MAX_CONNECTED_CELL_PAYLOAD_LEN);

diff --git a/src/feature/relay/dns.c b/src/feature/relay/dns.c
index 71c6f56fb16afbd95c0cc47271677243998ef33c..b15e5f30c72df7db4c0fa8b136f9a2ed2ae461dd 100644 (file)
--- a/src/feature/relay/dns.c
+++ b/src/feature/relay/dns.c
@@ -496,7 +496,7 @@ send_resolved_cell,(edge_connection_t *conn, uint8_t answer_type,
   uint32_t ttl;
 
   buf[0] = answer_type;
-  ttl = clip_dns_ttl(conn->address_ttl);
+  ttl = conn->address_ttl;
 
   switch (answer_type)
     {
@@ -568,7 +568,7 @@ send_resolved_hostname_cell,(edge_connection_t *conn,
   size_t namelen = strlen(hostname);
 
   tor_assert(namelen < 256);
-  ttl = clip_dns_ttl(conn->address_ttl);
+  ttl = conn->address_ttl;
 
   buf[0] = RESOLVED_TYPE_HOSTNAME;
   buf[1] = (uint8_t)namelen;
@@ -1294,7 +1294,7 @@ make_pending_resolve_cached(cached_resolve_t *resolve)
         resolve->ttl_hostname < ttl)
       ttl = resolve->ttl_hostname;
 
-    set_expiry(new_resolve, time(NULL) + clip_dns_ttl(ttl));
+    set_expiry(new_resolve, time(NULL) + ttl);
   }
 
   assert_cache_ok();
@@ -1637,7 +1637,7 @@ evdns_callback(int result, char type, int count, int ttl, void *addresses,
   }
   if (result != DNS_ERR_SHUTDOWN)
     dns_found_answer(string_address, orig_query_type,
-                     result, &addr, hostname, ttl);
+                     result, &addr, hostname, clip_dns_ttl(ttl));
 
   tor_free(arg_);
 }

diff --git a/src/test/test_cell_formats.c b/src/test/test_cell_formats.c
index f9ff101c98c3f299de62f61c6ec57c4d4e32ab3e..cae25d00ec01722ff5b73d1fe136f7e8ed52cfb7 100644 (file)
--- a/src/test/test_cell_formats.c
+++ b/src/test/test_cell_formats.c
@@ -354,7 +354,7 @@ test_cfmt_connected_cells(void *arg)
   rh.length = connected_cell_format_payload(cell.payload+RELAY_HEADER_SIZE,
                                             &addr, 1024);
   tt_int_op(rh.length, OP_EQ, 8);
-  test_memeq_hex(cell.payload+RELAY_HEADER_SIZE, "1e28323c" "00000e10");
+  test_memeq_hex(cell.payload+RELAY_HEADER_SIZE, "1e28323c" "00000400");
 
   /* Try parsing it. */
   tor_addr_make_unspec(&addr);
@@ -362,7 +362,7 @@ test_cfmt_connected_cells(void *arg)
   tt_int_op(r, OP_EQ, 0);
   tt_int_op(tor_addr_family(&addr), OP_EQ, AF_INET);
   tt_str_op(fmt_addr(&addr), OP_EQ, "30.40.50.60");
-  tt_int_op(ttl, OP_EQ, 3600); /* not 1024, since we clipped to 3600 */
+  tt_int_op(ttl, OP_EQ, 1024);
 
   /* Try an IPv6 address */
   memset(&rh, 0, sizeof(rh));