aboutsummaryrefslogtreecommitdiff
path: root/src/test/test_relaycell.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/test/test_relaycell.c')
-rw-r--r--src/test/test_relaycell.c249
1 files changed, 249 insertions, 0 deletions
diff --git a/src/test/test_relaycell.c b/src/test/test_relaycell.c
new file mode 100644
index 000000000..5deb36260
--- /dev/null
+++ b/src/test/test_relaycell.c
@@ -0,0 +1,249 @@
+/* Copyright (c) 2014, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/* Unit tests for handling different kinds of relay cell */
+
+#define RELAY_PRIVATE
+#include "or.h"
+#include "config.h"
+#include "connection.h"
+#include "connection_edge.h"
+#include "relay.h"
+#include "test.h"
+
+static int srm_ncalls;
+static entry_connection_t *srm_conn;
+static int srm_atype;
+static size_t srm_alen;
+static int srm_answer_is_set;
+static uint8_t srm_answer[512];
+static int srm_ttl;
+static time_t srm_expires;
+
+/* Mock replacement for connection_ap_hannshake_socks_resolved() */
+static void
+socks_resolved_mock(entry_connection_t *conn,
+ int answer_type,
+ size_t answer_len,
+ const uint8_t *answer,
+ int ttl,
+ time_t expires)
+{
+ srm_ncalls++;
+ srm_conn = conn;
+ srm_atype = answer_type;
+ srm_alen = answer_len;
+ if (answer) {
+ memset(srm_answer, 0, sizeof(srm_answer));
+ memcpy(srm_answer, answer, answer_len < 512 ? answer_len : 512);
+ srm_answer_is_set = 1;
+ } else {
+ srm_answer_is_set = 0;
+ }
+ srm_ttl = ttl;
+ srm_expires = expires;
+}
+
+static int mum_ncalls;
+static entry_connection_t *mum_conn;
+static int mum_endreason;
+
+/* Mock replacement for connection_mark_unattached_ap_() */
+static void
+mark_unattached_mock(entry_connection_t *conn, int endreason,
+ int line, const char *file)
+{
+ ++mum_ncalls;
+ mum_conn = conn;
+ mum_endreason = endreason;
+ (void) line;
+ (void) file;
+}
+
+/* Tests for connection_edge_process_resolved_cell().
+
+ The point of ..process_resolved_cell() is to handle an incoming cell
+ on an entry connection, and call connection_mark_unattached_ap() and/or
+ connection_ap_handshake_socks_resolved().
+ */
+static void
+test_relaycell_resolved(void *arg)
+{
+ entry_connection_t *entryconn;
+ edge_connection_t *edgeconn;
+ cell_t cell;
+ relay_header_t rh;
+ int r;
+ or_options_t *options = get_options_mutable();
+
+#define SET_CELL(s) do { \
+ memset(&cell, 0, sizeof(cell)); \
+ memset(&rh, 0, sizeof(rh)); \
+ memcpy(cell.payload + RELAY_HEADER_SIZE, (s), sizeof((s))-1); \
+ rh.length = sizeof((s))-1; \
+ rh.command = RELAY_COMMAND_RESOLVED; \
+ } while (0)
+#define MOCK_RESET() do { \
+ srm_ncalls = mum_ncalls = 0; \
+ } while (0)
+#define ASSERT_MARK_CALLED(reason) do { \
+ tt_int_op(mum_ncalls, ==, 1); \
+ tt_ptr_op(mum_conn, ==, entryconn); \
+ tt_int_op(mum_endreason, ==, (reason)); \
+ } while (0)
+#define ASSERT_RESOLVED_CALLED(atype, answer, ttl, expires) do { \
+ tt_int_op(srm_ncalls, ==, 1); \
+ tt_ptr_op(srm_conn, ==, entryconn); \
+ tt_int_op(srm_atype, ==, (atype)); \
+ if (answer) { \
+ tt_int_op(srm_alen, ==, sizeof(answer)-1); \
+ tt_int_op(srm_alen, <, 512); \
+ tt_int_op(srm_answer_is_set, ==, 1); \
+ tt_mem_op(srm_answer, ==, answer, sizeof(answer)-1); \
+ } else { \
+ tt_int_op(srm_answer_is_set, ==, 0); \
+ } \
+ tt_int_op(srm_ttl, ==, ttl); \
+ tt_int_op(srm_expires, ==, expires); \
+ } while (0)
+
+ (void)arg;
+
+ MOCK(connection_mark_unattached_ap_, mark_unattached_mock);
+ MOCK(connection_ap_handshake_socks_resolved, socks_resolved_mock);
+
+ options->ClientDNSRejectInternalAddresses = 0;
+
+ SET_CELL(/* IPv4: 127.0.1.2, ttl 256 */
+ "\x04\x04\x7f\x00\x01\x02\x00\x00\x01\x00"
+ /* IPv4: 18.0.0.1, ttl 512 */
+ "\x04\x04\x12\x00\x00\x01\x00\x00\x02\x00"
+ /* IPv6: 2003::3, ttl 1024 */
+ "\x06\x10"
+ "\x20\x02\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x03"
+ "\x00\x00\x04\x00");
+
+ entryconn = entry_connection_new(CONN_TYPE_AP, AF_INET);
+ edgeconn = ENTRY_TO_EDGE_CONN(entryconn);
+
+ /* Try with connection in non-RESOLVE_WAIT state: cell gets ignored */
+ MOCK_RESET();
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ tt_int_op(srm_ncalls, ==, 0);
+ tt_int_op(mum_ncalls, ==, 0);
+
+ /* Now put it in the right state. */
+ ENTRY_TO_CONN(entryconn)->state = AP_CONN_STATE_RESOLVE_WAIT;
+ entryconn->socks_request->command = SOCKS_COMMAND_RESOLVE;
+ entryconn->ipv4_traffic_ok = 1;
+ entryconn->ipv6_traffic_ok = 1;
+ entryconn->prefer_ipv6_traffic = 0;
+
+ /* We prefer ipv4, so we should get the first ipv4 answer */
+ MOCK_RESET();
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ ASSERT_MARK_CALLED(END_STREAM_REASON_DONE|
+ END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
+ ASSERT_RESOLVED_CALLED(RESOLVED_TYPE_IPV4, "\x7f\x00\x01\x02", 256, -1);
+
+ /* But we may be discarding private answers. */
+ MOCK_RESET();
+ options->ClientDNSRejectInternalAddresses = 1;
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ ASSERT_MARK_CALLED(END_STREAM_REASON_DONE|
+ END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
+ ASSERT_RESOLVED_CALLED(RESOLVED_TYPE_IPV4, "\x12\x00\x00\x01", 512, -1);
+
+ /* now prefer ipv6, and get the first ipv6 answer */
+ entryconn->prefer_ipv6_traffic = 1;
+ MOCK_RESET();
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ ASSERT_MARK_CALLED(END_STREAM_REASON_DONE|
+ END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
+ ASSERT_RESOLVED_CALLED(RESOLVED_TYPE_IPV6,
+ "\x20\x02\x00\x00\x00\x00\x00\x00"
+ "\x00\x00\x00\x00\x00\x00\x00\x03",
+ 1024, -1);
+
+ /* With a cell that only has IPv4, we report IPv4 even if we prefer IPv6 */
+ MOCK_RESET();
+ SET_CELL("\x04\x04\x12\x00\x00\x01\x00\x00\x02\x00");
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ ASSERT_MARK_CALLED(END_STREAM_REASON_DONE|
+ END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
+ ASSERT_RESOLVED_CALLED(RESOLVED_TYPE_IPV4, "\x12\x00\x00\x01", 512, -1);
+
+ /* But if we don't allow IPv4, we report nothing if the cell contains only
+ * ipv4 */
+ MOCK_RESET();
+ entryconn->ipv4_traffic_ok = 0;
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ ASSERT_MARK_CALLED(END_STREAM_REASON_DONE|
+ END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
+ ASSERT_RESOLVED_CALLED(RESOLVED_TYPE_ERROR, NULL, -1, -1);
+
+ /* If we wanted hostnames, we report nothing, since we only had IPs. */
+ MOCK_RESET();
+ entryconn->ipv4_traffic_ok = 1;
+ entryconn->socks_request->command = SOCKS_COMMAND_RESOLVE_PTR;
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ ASSERT_MARK_CALLED(END_STREAM_REASON_DONE|
+ END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
+ ASSERT_RESOLVED_CALLED(RESOLVED_TYPE_ERROR, NULL, -1, -1);
+
+ /* A hostname cell is fine though. */
+ MOCK_RESET();
+ SET_CELL("\x00\x0fwww.example.com\x00\x01\x00\x00");
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ ASSERT_MARK_CALLED(END_STREAM_REASON_DONE|
+ END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
+ ASSERT_RESOLVED_CALLED(RESOLVED_TYPE_HOSTNAME, "www.example.com", 65536, -1);
+
+ /* error on malformed cell */
+ MOCK_RESET();
+ entryconn->socks_request->command = SOCKS_COMMAND_RESOLVE;
+ SET_CELL("\x04\x04\x01\x02\x03\x04"); /* no ttl */
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ ASSERT_MARK_CALLED(END_STREAM_REASON_TORPROTOCOL);
+ tt_int_op(srm_ncalls, ==, 0);
+
+ /* error on all addresses private */
+ MOCK_RESET();
+ SET_CELL(/* IPv4: 127.0.1.2, ttl 256 */
+ "\x04\x04\x7f\x00\x01\x02\x00\x00\x01\x00"
+ /* IPv4: 192.168.1.1, ttl 256 */
+ "\x04\x04\xc0\xa8\x01\x01\x00\x00\x01\x00");
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ ASSERT_MARK_CALLED(END_STREAM_REASON_TORPROTOCOL);
+ ASSERT_RESOLVED_CALLED(RESOLVED_TYPE_ERROR_TRANSIENT, NULL, 0, TIME_MAX);
+
+ /* Legit error code */
+ MOCK_RESET();
+ SET_CELL("\xf0\x15" "quiet and meaningless" "\x00\x00\x0f\xff");
+ r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
+ tt_int_op(r, ==, 0);
+ ASSERT_MARK_CALLED(END_STREAM_REASON_DONE|
+ END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
+ ASSERT_RESOLVED_CALLED(RESOLVED_TYPE_ERROR_TRANSIENT, NULL, -1, -1);
+
+ done:
+ UNMOCK(connection_mark_unattached_ap_);
+ UNMOCK(connection_ap_handshake_socks_resolved);
+}
+
+struct testcase_t relaycell_tests[] = {
+ { "resolved", test_relaycell_resolved, TT_FORK, NULL, NULL },
+ END_OF_TESTCASES
+};
+
generated by cgit v1.2.3 (git 2.25.4) at 2024-05-18 03:31:44 +0000