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