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addr: Refactor is_local_addr() to support IPv6

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Series of changes:

  1. Rename function to reflect the namespace of the file.

  2. Use the new last resolved cache instead of the unused
     last_resolved_addr_v4 (which is also removed in this commit).

  3. Make the entire code base use the new resolved_addr_is_local() function.

You will notice that this function uses /24 to differentiate subnets where the
rest of tor uses /16 (including documentation of EnforceDistinctSubnets).
Ticket #40009 has been opened for that.

But that the moment, the function keeps looking at /24.

Part of #33233

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet
2020-06-23 10:43:39 -04:00
parent 7795dd7ef6
commit 2f3b4e3888
5 changed files with 56 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/test/test_channeltls.c
+16 -16
View File
@@ -38,13 +38,13 @@ static or_connection_t * tlschan_connection_or_connect_mock(
const char *digest,
const ed25519_public_key_t *ed_id,
channel_tls_t *tlschan);
static int tlschan_is_local_addr_mock(const tor_addr_t *addr);
static bool tlschan_resolved_addr_is_local_mock(const tor_addr_t *addr);
/* Fake close method */
static void tlschan_fake_close_method(channel_t *chan);
/* Flags controlling behavior of channeltls unit test mocks */
static int tlschan_local = 0;
static bool tlschan_local = false;
static const buf_t * tlschan_buf_datalen_mock_target = NULL;
static size_t tlschan_buf_datalen_mock_size = 0;
@@ -67,9 +67,9 @@ test_channeltls_create(void *arg)
test_addr.addr.in_addr.s_addr = htonl(0x01020304);
/* For this test we always want the address to be treated as non-local */
tlschan_local = 0;
/* Install is_local_addr() mock */
MOCK(is_local_addr, tlschan_is_local_addr_mock);
tlschan_local = false;
/* Install resolved_addr_is_local() mock */
MOCK(resolved_addr_is_local, tlschan_resolved_addr_is_local_mock);
/* Install mock for connection_or_connect() */
MOCK(connection_or_connect, tlschan_connection_or_connect_mock);
@@ -92,7 +92,7 @@ test_channeltls_create(void *arg)
}
UNMOCK(connection_or_connect);
UNMOCK(is_local_addr);
UNMOCK(resolved_addr_is_local);
return;
}
@@ -116,9 +116,9 @@ test_channeltls_num_bytes_queued(void *arg)
test_addr.addr.in_addr.s_addr = htonl(0x01020304);
/* For this test we always want the address to be treated as non-local */
tlschan_local = 0;
/* Install is_local_addr() mock */
MOCK(is_local_addr, tlschan_is_local_addr_mock);
tlschan_local = false;
/* Install resolved_addr_is_local() mock */
MOCK(resolved_addr_is_local, tlschan_resolved_addr_is_local_mock);
/* Install mock for connection_or_connect() */
MOCK(connection_or_connect, tlschan_connection_or_connect_mock);
@@ -178,7 +178,7 @@ test_channeltls_num_bytes_queued(void *arg)
}
UNMOCK(connection_or_connect);
UNMOCK(is_local_addr);
UNMOCK(resolved_addr_is_local);
return;
}
@@ -201,9 +201,9 @@ test_channeltls_overhead_estimate(void *arg)
test_addr.addr.in_addr.s_addr = htonl(0x01020304);
/* For this test we always want the address to be treated as non-local */
tlschan_local = 0;
/* Install is_local_addr() mock */
MOCK(is_local_addr, tlschan_is_local_addr_mock);
tlschan_local = false;
/* Install resolved_addr_is_local() mock */
MOCK(resolved_addr_is_local, tlschan_resolved_addr_is_local_mock);
/* Install mock for connection_or_connect() */
MOCK(connection_or_connect, tlschan_connection_or_connect_mock);
@@ -252,7 +252,7 @@ test_channeltls_overhead_estimate(void *arg)
}
UNMOCK(connection_or_connect);
UNMOCK(is_local_addr);
UNMOCK(resolved_addr_is_local);
return;
}
@@ -321,8 +321,8 @@ tlschan_fake_close_method(channel_t *chan)
return;
}
static int
tlschan_is_local_addr_mock(const tor_addr_t *addr)
static bool
tlschan_resolved_addr_is_local_mock(const tor_addr_t *addr)
{
tt_ptr_op(addr, OP_NE, NULL);