Begin writing unit tests for rewrite code

src/or/connection_edge.c

@@ -924,6 +924,7 @@ connection_ap_handshake_rewrite(entry_connection_t *conn,
   out->map_expires = TIME_MAX;
   out->end_reason = 0;
   out->should_close = 0;
+  out->orig_address[0] = 0;
 
   tor_strlower(socks->address); /* normalize it */
   strlcpy(out->orig_address, socks->address, sizeof(out->orig_address));

src/or/connection_edge.h

@@ -151,7 +151,8 @@ typedef struct {
    */
   char orig_address[MAX_SOCKS_ADDR_LEN];
   /** True iff the address has been automatically remapped to a local
-   * address in VirtualAddrNetwork */
+   * address in VirtualAddrNetwork.  (Only set true the first time we
+   * do the mapping.) */
   int automap;
   /** If this connection has a .exit address, who put it there? */
   addressmap_entry_source_t exit_source;

src/test/include.am

@@ -31,6 +31,7 @@ src_test_test_SOURCES = \
 	src/test/test_data.c \
 	src/test/test_dir.c \
 	src/test/test_checkdir.c \
+	src/test/test_entryconn.c \
 	src/test/test_entrynodes.c \
 	src/test/test_extorport.c \
 	src/test/test_introduce.c \

src/test/test.c

@@ -1313,6 +1313,7 @@ extern struct testcase_t channel_tests[];
 extern struct testcase_t channeltls_tests[];
 extern struct testcase_t relay_tests[];
 extern struct testcase_t scheduler_tests[];
+extern struct testcase_t entryconn_tests[];
 
 static struct testgroup_t testgroups[] = {
   { "", test_array },
@@ -1337,6 +1338,7 @@ static struct testgroup_t testgroups[] = {
   { "circuitmux/", circuitmux_tests },
   { "options/", options_tests },
   { "entrynodes/", entrynodes_tests },
+  { "entryconn/", entryconn_tests },
   { "extorport/", extorport_tests },
   { "control/", controller_event_tests },
   { "hs/", hs_tests },

src/test/test_entryconn.c

+/* Copyright (c) 2014-2015, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#include "orconfig.h"
+
+#define CONNECTION_PRIVATE
+#define CONNECTION_EDGE_PRIVATE
+
+#include "or.h"
+#include "test.h"
+
+#include "addressmap.h"
+#include "config.h"
+#include "connection.h"
+#include "connection_edge.h"
+
+static void *
+entryconn_rewrite_setup(const struct testcase_t *tc)
+{
+  (void)tc;
+  entry_connection_t *ec = entry_connection_new(CONN_TYPE_AP, AF_INET);
+  addressmap_init();
+  return ec;
+}
+
+static int
+entryconn_rewrite_teardown(const struct testcase_t *tc, void *arg)
+{
+  (void)tc;
+  entry_connection_t *ec = arg;
+  if (ec)
+    connection_free_(ENTRY_TO_CONN(ec));
+  addressmap_free_all();
+  return 1;
+}
+
+static struct testcase_setup_t test_rewrite_setup = {
+  entryconn_rewrite_setup, entryconn_rewrite_teardown
+};
+
+/* Simple rewrite: no changes needed */
+static void
+test_entryconn_rewrite_basic(void *arg)
+{
+  entry_connection_t *ec = arg;
+  rewrite_result_t rr;
+
+  tt_assert(ec->socks_request);
+  strlcpy(ec->socks_request->address, "www.TORproject.org",
+          sizeof(ec->socks_request->address));
+  ec->socks_request->command = SOCKS_COMMAND_CONNECT;
+  connection_ap_handshake_rewrite(ec, &rr);
+
+  tt_int_op(rr.should_close, OP_EQ, 0);
+  tt_int_op(rr.end_reason, OP_EQ, 0);
+  tt_int_op(rr.automap, OP_EQ, 0);
+  tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
+  tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
+  tt_str_op(rr.orig_address, OP_EQ, "www.torproject.org");
+  tt_str_op(ec->socks_request->address, OP_EQ, "www.torproject.org");
+  tt_str_op(ec->original_dest_address, OP_EQ, "www.torproject.org");
+
+ done:
+  ;
+}
+
+/* Rewrite but reject because of disallowed .exit */
+static void
+test_entryconn_rewrite_bad_dotexit(void *arg)
+{
+  entry_connection_t *ec = arg;
+  rewrite_result_t rr;
+
+  get_options_mutable()->AllowDotExit = 0;
+  tt_assert(ec->socks_request);
+  strlcpy(ec->socks_request->address, "www.TORproject.org.foo.exit",
+          sizeof(ec->socks_request->address));
+  ec->socks_request->command = SOCKS_COMMAND_CONNECT;
+  connection_ap_handshake_rewrite(ec, &rr);
+
+  tt_int_op(rr.should_close, OP_EQ, 1);
+  tt_int_op(rr.end_reason, OP_EQ, END_STREAM_REASON_TORPROTOCOL);
+
+ done:
+  ;
+}
+
+/* Automap on resolve, connect to automapped address, resolve again and get
+ * same answer. (IPv4) */
+static void
+test_entryconn_rewrite_automap_ipv4(void *arg)
+{
+  entry_connection_t *ec = arg;
+  entry_connection_t *ec2=NULL, *ec3=NULL;
+  rewrite_result_t rr;
+  char *msg = NULL;
+
+  ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET);
+  ec3 = entry_connection_new(CONN_TYPE_AP, AF_INET);
+
+  get_options_mutable()->AutomapHostsOnResolve = 1;
+  get_options_mutable()->AutomapHostsSuffixes = smartlist_new();
+  smartlist_add(get_options_mutable()->AutomapHostsSuffixes, tor_strdup("."));
+  parse_virtual_addr_network("127.202.0.0/16", AF_INET, 0, &msg);
+
+  /* Automap this on resolve. */
+  strlcpy(ec->socks_request->address, "WWW.MIT.EDU",
+          sizeof(ec->socks_request->address));
+  ec->socks_request->command = SOCKS_COMMAND_RESOLVE;
+  connection_ap_handshake_rewrite(ec, &rr);
+
+  tt_int_op(rr.automap, OP_EQ, 1);
+  tt_int_op(rr.should_close, OP_EQ, 0);
+  tt_int_op(rr.end_reason, OP_EQ, 0);
+  tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
+  tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
+  tt_str_op(rr.orig_address, OP_EQ, "www.mit.edu");
+  tt_str_op(ec->original_dest_address, OP_EQ, "www.mit.edu");
+
+  tt_assert(!strcmpstart(ec->socks_request->address,"127.202."));
+
+  /* Connect to it and make sure we get the original address back. */
+  strlcpy(ec2->socks_request->address, ec->socks_request->address,
+          sizeof(ec2->socks_request->address));
+
+  ec2->socks_request->command = SOCKS_COMMAND_CONNECT;
+  connection_ap_handshake_rewrite(ec2, &rr);
+
+  tt_int_op(rr.automap, OP_EQ, 0);
+  tt_int_op(rr.should_close, OP_EQ, 0);
+  tt_int_op(rr.end_reason, OP_EQ, 0);
+  tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
+  tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
+  tt_str_op(rr.orig_address, OP_EQ, ec->socks_request->address);
+  tt_str_op(ec2->original_dest_address, OP_EQ, ec->socks_request->address);
+  tt_str_op(ec2->socks_request->address, OP_EQ, "www.mit.edu");
+
+  /* Resolve it again, make sure the answer is the same. */
+  strlcpy(ec3->socks_request->address, "www.MIT.EDU",
+          sizeof(ec3->socks_request->address));
+  ec3->socks_request->command = SOCKS_COMMAND_RESOLVE;
+  connection_ap_handshake_rewrite(ec3, &rr);
+
+  tt_int_op(rr.automap, OP_EQ, 1);
+  tt_int_op(rr.should_close, OP_EQ, 0);
+  tt_int_op(rr.end_reason, OP_EQ, 0);
+  tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
+  tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
+  tt_str_op(rr.orig_address, OP_EQ, "www.mit.edu");
+  tt_str_op(ec3->original_dest_address, OP_EQ, "www.mit.edu");
+
+  tt_str_op(ec3->socks_request->address, OP_EQ,
+            ec->socks_request->address);
+
+ done:
+  connection_free_(ENTRY_TO_CONN(ec2));
+  connection_free_(ENTRY_TO_CONN(ec3));
+}
+
+/* Automap on resolve, connect to automapped address, resolve again and get
+ * same answer. (IPv6) */
+static void
+test_entryconn_rewrite_automap_ipv6(void *arg)
+{
+  entry_connection_t *ec = arg;
+  entry_connection_t *ec2=NULL, *ec3=NULL;
+  rewrite_result_t rr;
+  char *msg = NULL;
+  connection_free_(ENTRY_TO_CONN(ec));
+  ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET6);
+  ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET6);
+  ec3 = entry_connection_new(CONN_TYPE_AP, AF_INET6);
+
+  get_options_mutable()->AutomapHostsOnResolve = 1;
+  get_options_mutable()->AutomapHostsSuffixes = smartlist_new();
+  smartlist_add(get_options_mutable()->AutomapHostsSuffixes, tor_strdup("."));
+  parse_virtual_addr_network("FE80::/32", AF_INET6, 0, &msg);
+
+  /* Automap this on resolve. */
+  strlcpy(ec->socks_request->address, "WWW.MIT.EDU",
+          sizeof(ec->socks_request->address));
+  ec->socks_request->command = SOCKS_COMMAND_RESOLVE;
+  connection_ap_handshake_rewrite(ec, &rr);
+
+  tt_int_op(rr.automap, OP_EQ, 1);
+  tt_int_op(rr.should_close, OP_EQ, 0);
+  tt_int_op(rr.end_reason, OP_EQ, 0);
+  tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
+  tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
+  tt_str_op(rr.orig_address, OP_EQ, "www.mit.edu");
+  tt_str_op(ec->original_dest_address, OP_EQ, "www.mit.edu");
+
+  printf("<%s>\n", ec->socks_request->address);
+  /* XXXX Should this [ be here? */
+  tt_assert(!strcmpstart(ec->socks_request->address,"[fe80:"));
+
+  /* Connect to it and make sure we get the original address back. */
+  strlcpy(ec2->socks_request->address, ec->socks_request->address,
+          sizeof(ec2->socks_request->address));
+
+  ec2->socks_request->command = SOCKS_COMMAND_CONNECT;
+  connection_ap_handshake_rewrite(ec2, &rr);
+
+  tt_int_op(rr.automap, OP_EQ, 0);
+  tt_int_op(rr.should_close, OP_EQ, 0);
+  tt_int_op(rr.end_reason, OP_EQ, 0);
+  tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
+  tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
+  tt_str_op(rr.orig_address, OP_EQ, ec->socks_request->address);
+  tt_str_op(ec2->original_dest_address, OP_EQ, ec->socks_request->address);
+  tt_str_op(ec2->socks_request->address, OP_EQ, "www.mit.edu");
+
+  /* Resolve it again, make sure the answer is the same. */
+  strlcpy(ec3->socks_request->address, "www.MIT.EDU",
+          sizeof(ec3->socks_request->address));
+  ec3->socks_request->command = SOCKS_COMMAND_RESOLVE;
+  connection_ap_handshake_rewrite(ec3, &rr);
+
+  tt_int_op(rr.automap, OP_EQ, 1);
+  tt_int_op(rr.should_close, OP_EQ, 0);
+  tt_int_op(rr.end_reason, OP_EQ, 0);
+  tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
+  tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
+  tt_str_op(rr.orig_address, OP_EQ, "www.mit.edu");
+  tt_str_op(ec3->original_dest_address, OP_EQ, "www.mit.edu");
+
+  tt_str_op(ec3->socks_request->address, OP_EQ,
+            ec->socks_request->address);
+
+ done:
+  connection_free_(ENTRY_TO_CONN(ec2));
+  connection_free_(ENTRY_TO_CONN(ec3));
+}
+
+/* automap on resolve, reverse lookup. */
+
+/* Rewrite because of cached DNS entry. */
+
+/* Rewrite because of AddrmapRewrite option */
+
+/* Rewrite because of control port */
+
+/* Rewrite into .exit because of virtual address mapping */
+
+/* Rewrite into .exit because of mapaddress */
+
+/* Fail to connect to unmapped address in virtual range. */
+
+/* Rewrite plus automap */
+
+/* Map foo.onion to longthing.onion */
+
+
+
+#define REWRITE(name)                           \
+  { #name, test_entryconn_##name, TT_FORK, &test_rewrite_setup, NULL }
+
+struct testcase_t entryconn_tests[] = {
+  REWRITE(rewrite_basic),
+  REWRITE(rewrite_bad_dotexit),
+  REWRITE(rewrite_automap_ipv4),
+  REWRITE(rewrite_automap_ipv6),
+  END_OF_TESTCASES
+};
+