113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
// Copyright 2022 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/base/sockaddr_util_posix.h"
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include "net/base/sockaddr_storage.h"
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#include "testing/gmock/include/gmock/gmock-matchers.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace net {
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namespace {
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size_t MaxPathLength(SockaddrStorage* storage) {
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// |storage.addr_len| is initialized to the largest possible platform-
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// dependent value. Subtracting the size of the initial fields in
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// sockaddr_un gives us the longest permissible path value including space
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// for an extra NUL character at the front or back.
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return storage->addr_len - offsetof(struct sockaddr_un, sun_path) - 1;
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}
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} // namespace
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TEST(FillUnixAddressTest, SimpleAddress) {
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SockaddrStorage storage;
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std::string path = "/tmp/socket/path";
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EXPECT_TRUE(
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FillUnixAddress(path, /*use_abstract_namespace=*/false, &storage));
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// |storage.addr_len| indicates the full size of the data in sockaddr_un.
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// The size is increased by one byte to include the string NUL terminator.
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EXPECT_EQ(path.size() + 1U + offsetof(struct sockaddr_un, sun_path),
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(unsigned int)storage.addr_len);
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struct sockaddr_un* socket_addr =
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reinterpret_cast<struct sockaddr_un*>(storage.addr);
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EXPECT_EQ(socket_addr->sun_family, AF_UNIX);
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// Implicit conversion to std::string for comparison is fine since the path
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// is always NUL terminated.
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EXPECT_EQ(socket_addr->sun_path, path);
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}
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TEST(FillUnixAddressTest, PathEmpty) {
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SockaddrStorage storage;
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std::string path = "";
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EXPECT_FALSE(
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FillUnixAddress(path, /*use_abstract_namespace=*/false, &storage));
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}
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TEST(FillUnixAddressTest, AddressMaxLength) {
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SockaddrStorage storage;
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size_t path_max = MaxPathLength(&storage);
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std::string path(path_max, '0');
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EXPECT_TRUE(
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FillUnixAddress(path, /*use_abstract_namespace=*/false, &storage));
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struct sockaddr_un* socket_addr =
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reinterpret_cast<struct sockaddr_un*>(storage.addr);
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EXPECT_EQ(socket_addr->sun_family, AF_UNIX);
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EXPECT_EQ(socket_addr->sun_path, path);
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}
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TEST(FillUnixAddressTest, AddressTooLong) {
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SockaddrStorage storage;
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size_t path_max = MaxPathLength(&storage);
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std::string path(path_max + 1, '0');
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EXPECT_FALSE(
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FillUnixAddress(path, /*use_abstract_namespace=*/false, &storage));
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}
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TEST(FillUnixAddressTest, AbstractLinuxAddress) {
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SockaddrStorage storage;
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size_t path_max = MaxPathLength(&storage);
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std::string path(path_max, '0');
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#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
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EXPECT_TRUE(FillUnixAddress(path, /*use_abstract_namespace=*/true, &storage));
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EXPECT_EQ(path.size() + 1U + offsetof(struct sockaddr_un, sun_path),
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(unsigned int)storage.addr_len);
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struct sockaddr_un* socket_addr =
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reinterpret_cast<struct sockaddr_un*>(storage.addr);
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EXPECT_EQ(socket_addr->sun_family, AF_UNIX);
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// The path buffer is preceded by a NUL character for abstract Linux
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// addresses.
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EXPECT_EQ(socket_addr->sun_path[0], '\0');
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// The path string may not be NUL terminated, so do a buffer copy when
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// converting to std::string.
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std::string unix_path(reinterpret_cast<char*>(socket_addr->sun_path + 1),
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path.size());
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EXPECT_EQ(unix_path, path);
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#else
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// Other platforms don't support the abstract Linux namespace.
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EXPECT_FALSE(
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FillUnixAddress(path, /*use_abstract_namespace=*/true, &storage));
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#endif
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}
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} // namespace net
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