net/dns/BUILD.gn

# Copyright 2018 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.

import("//testing/libfuzzer/fuzzer_test.gni")
import("//net/features.gni")

enable_built_in_dns = !is_ios && !is_proto_quic

source_set("dns") {
  # Due to circular dependencies, should only be depended on through //net.
  visibility = [ "//net" ]

  # Internals only intended for use inside network stack (and tests).
  friend = [
    "//chrome/browser:test_support",
    "//chrome/test/*",
    "//components/certificate_transparency:unit_tests",
    "//components/cronet/*",
    "//net/*",
    "//services/network/*",
  ]

  public = []
  sources = [
    "dns_util.cc",
    "dns_util.h",
  ]

  if (!is_nacl) {
    sources += [
      "address_sorter.h",
      "address_sorter_win.cc",
      "dns_config_service.cc",
      "dns_config_service_win.cc",
      "dns_config_service_win.h",
      "dns_config_watcher_mac.cc",
      "dns_config_watcher_mac.h",
      "dns_hosts.cc",
      "dns_hosts.h",
      "dns_query.cc",
      "dns_query.h",
      "dns_reloader.cc",
      "dns_reloader.h",
      "dns_response.cc",
      "dns_session.cc",
      "dns_session.h",
      "dns_socket_pool.cc",
      "dns_socket_pool.h",
      "dns_transaction.cc",
      "host_cache.cc",
      "host_resolver.cc",
      "host_resolver_impl.cc",
      "host_resolver_proc.cc",
      "host_resolver_proc.h",
      "host_resolver_source.h",
      "mapped_host_resolver.cc",
      "notify_watcher_mac.cc",
      "notify_watcher_mac.h",
      "record_parsed.cc",
      "record_rdata.cc",
      "serial_worker.cc",
      "serial_worker.h",
    ]

    if (is_posix || is_fuchsia) {
      sources += [ "dns_config_service_posix.cc" ]

      if (enable_built_in_dns) {
        sources += [
          "address_sorter_posix.cc",
          "address_sorter_posix.h",
        ]
      }
    }

    if (enable_built_in_dns) {
      sources += [ "dns_client.cc" ]
    }

    if (enable_mdns) {
      sources += [
        "mdns_cache.cc",
        "mdns_cache.h",
        "mdns_client.cc",
        "mdns_client_impl.cc",
        "mdns_client_impl.h",
      ]
    }
  }

  deps = [
    "//net:net_deps",
  ]

  public_deps = [
    ":dns_client",
    ":host_resolver",
    ":host_resolver_impl",
    ":mdns_client",
    "//net:net_public_deps",
  ]

  allow_circular_includes_from = [
    ":dns_client",
    ":host_resolver",
    ":host_resolver_impl",
    ":mdns_client",
  ]
}

# The standard API of net/dns.
#
# Should typically only be used within the network service. Usage external to
# the network service should instead use network service Mojo IPCs for host
# resolution. See ResolveHost() in
# /services/network/public/mojom/network_context.mojom and
# /services/network/public/mojom/host_resolver.mojom.
source_set("host_resolver") {
  # Due to circular dependencies, should only be depended on through //net.
  # Limit visibility to //net and other source_sets with the same access
  # restriction.
  visibility = [
    ":dns",
    ":host_resolver_impl",
    ":mdns_client",
    "//net",
  ]

  # Whitelist-only access so we can keep track of all usage external to the
  # network stack and network service.
  friend = [
    # chrome/browser/devtools/device/tcp_device_provider.cc
    # TODO(crbug.com/874653): Remove once migrated to network service IPC.
    #
    # chrome/browser/devtools/device/port_forwarding_controller.cc
    # TODO(crbug.com/874651): Remove once migrated to network service IPC.
    "//chrome/browser/devtools",

    # chrome/browser/io_thread.cc
    # Used to build in-process HostResolver when network service disabled.
    #
    # chrome/browser/net/dns_probe_service.cc
    # TODO(crbug.com/874660): Remove once migrated to network service IPC.
    #
    # chrome/browser/net/url_info.h
    # chrome/browser/net_benchmarking.cc
    # HostResolver only used for deprecated net::Predictor.
    # TODO(crbug.com/875238): Remove once deprecated code is removed.
    "//chrome/browser",

    # chrome/browser/ui/webui/net_internals/net_internals_ui.cc
    # TODO(crbug.com/876110): Remove once migrated to network service IPC.
    "//chrome/browser/ui",

    # chromecast/browser/url_request_context_factory.cc
    # URLRequestContext creation for chromecast.
    "//chromecast/browser",

    # components/network_hints/browser/network_hints_message_filter.cc
    # TODO(crbug.com/874654): Remove once migrated to network service IPC.
    "//components/network_hints/browser",

    # content/public/browser/resource_hints.h
    # Deprecated and soon to be removed.
    # TODO(crbug.com/875238): Remove once code is removed.
    "//content/public/browser:browser_sources",

    # headless/lib/browser/headless_url_request_context_getter.cc
    # URLRequestContext creation for headless.
    "//headless",

    # URLRequestContext and HttpNetworkSession::Context creation for iOS.
    "//ios/components/io_thread",
    "//ios/web/shell",
    "//ios/web_view:*",

    # Tests and test support.
    "//chrome/browser:test_support",
    "//chrome/test:browser_tests",
    "//components/grpc_support/test:unit_tests",
    "//content/shell:content_shell_lib",

    # Stand-alone tools.
    "//components/sync/tools:*",
    "//google_apis/gcm:mcs_probe",

    # Network stack/service.
    "//components/certificate_transparency/*",
    "//components/cronet/*",
    "//net/*",
    "//services/network/*",
  ]

  sources = []
  public = []

  if (!is_nacl) {
    sources += [
      "dns_config_service.h",
      "host_cache.h",
      "host_resolver.h",
      "mapped_host_resolver.h",
    ]
  }

  deps = [
    "//net:net_deps",
  ]
  public_deps = [
    "//net:net_public_deps",
  ]
}

# Overridable implementation details of HostResolver.
# TODO(crbug.com/846423): Servicify or remove external usage.
source_set("host_resolver_impl") {
  # Due to circular dependencies, should only be depended on through //net.
  # Limit visibility to //net and other source_sets with the same access
  # restriction.
  visibility = [
    ":dns",
    "//net",
  ]

  # Whitelist-only access so we can keep track of all usage external to the
  # network stack.
  friend = [
    "//chromeos",
    "//components/cronet/*",
    "//net/*",
  ]

  sources = []
  public = []

  if (!is_nacl) {
    sources += [ "host_resolver_impl.h" ]

    if (is_posix || is_fuchsia) {
      sources += [ "dns_config_service_posix.h" ]
    }
  }

  deps = [
    ":host_resolver",
    "//net:net_deps",
  ]
  public_deps = [
    "//net:net_public_deps",
  ]
}

# DnsClient interfaces. Primarily intended as part of the impelementation of the
# standard HostResolver interface, but can be used as an alternative external
# interface for advanced usage.
# TODO(crbug.com/846423): Figure out what we want to do with these for
# servicification.
source_set("dns_client") {
  # Due to circular dependencies, should only be depended on through //net.
  # Limit visibility to //net and other source_sets with the same access
  # restriction.
  visibility = [
    ":dns",
    ":mdns_client",
    "//net",
  ]

  # Whitelist-only access so we can keep track of all usage external to the
  # network stack.
  friend = [
    "//chrome/browser",
    "//chrome/browser:test_support",
    "//chrome/browser/chromeos",
    "//chrome/test/*",
    "//components/certificate_transparency/*",
    "//net/*",
    "//services/network/*",
  ]

  sources = []
  public = []

  if (!is_nacl) {
    sources += [
      "dns_client.h",
      "dns_protocol.h",
      "dns_response.h",
      "dns_transaction.h",
      "record_parsed.h",
      "record_rdata.h",
    ]
  }

  deps = [
    "//net:net_deps",
  ]
  public_deps = [
    "//net:net_public_deps",
  ]
}

# MdnsClient interfaces.
# TODO(crbug.com/846423): Figure out what we want to do with these for
# servicification.
source_set("mdns_client") {
  # Due to circular dependencies, should only be depended on through //net.
  # Limit visibility to //net and other source_sets with the same access
  # restriction.
  visibility = [
    ":dns",
    "//net",
  ]

  # Whitelist-only access so we can keep track of all usage external to the
  # network stack.
  friend = [
    "//chrome/browser",
    "//chrome/browser:test_support",
    "//chrome/browser/chromeos",
    "//chrome/tools/service_discovery_sniffer",
    "//net/*",
  ]

  public = []
  sources = []

  if (!is_nacl && enable_mdns) {
    sources += [ "mdns_client.h" ]
  }

  deps = [
    ":dns_client",
    ":host_resolver",
    "//net:net_deps",
  ]
  public_deps = [
    "//net:net_public_deps",
  ]
}

if (enable_net_mojo) {
  # A host resolver implementation that forwards resolve requests to a mojo
  # service, thus acting as a client library to a servicified host resolver.
  # TODO(crbug.com/821021): Decide if this has any place in the generalized
  # host resolver servicification.
  source_set("mojo_client") {
    sources = [
      "host_resolver_mojo.cc",
      "host_resolver_mojo.h",
    ]

    deps = [
      "//base",
      "//net",
      "//net:net_with_v8",
    ]

    public_deps = [
      "//mojo/public/cpp/bindings",
      "//net/interfaces",
    ]
  }

  # A utility to handle host resolver requests coming into the network service
  # via mojo and pass the requests on to the actual host resolver. This utility
  # therefore acts as the service side of mojo interactions for host resolver.
  # TODO(crbug.com/821021): Decide if this has any place in the generalized
  # host resolver servicification.
  source_set("mojo_service") {
    sources = [
      "mojo_host_resolver_impl.cc",
      "mojo_host_resolver_impl.h",
    ]

    deps = [
      "//base",
      "//net",
    ]

    public_deps = [
      "//mojo/public/cpp/bindings",
      "//net/interfaces",
    ]
  }
}

source_set("tests") {
  testonly = true
  sources = [
    "dns_config_service_unittest.cc",
    "dns_config_service_win_unittest.cc",
    "dns_hosts_unittest.cc",
    "dns_query_unittest.cc",
    "dns_response_unittest.cc",
    "dns_session_unittest.cc",
    "dns_socket_pool_unittest.cc",
    "dns_transaction_unittest.cc",
    "dns_util_unittest.cc",
    "host_cache_unittest.cc",
    "host_resolver_impl_unittest.cc",
    "mapped_host_resolver_unittest.cc",
    "record_parsed_unittest.cc",
    "record_rdata_unittest.cc",
    "serial_worker_unittest.cc",
  ]

  if (is_posix || is_fuchsia) {
    sources += [ "dns_config_service_posix_unittest.cc" ]
  }

  if (enable_built_in_dns) {
    sources += [ "address_sorter_unittest.cc" ]
    if (is_posix || is_fuchsia) {
      sources += [ "address_sorter_posix_unittest.cc" ]
    }
  }

  if (enable_net_mojo) {
    sources += [
      "host_resolver_mojo_unittest.cc",
      "mojo_host_resolver_impl_unittest.cc",
    ]
  }

  if (enable_mdns) {
    sources += [
      "mdns_cache_unittest.cc",
      "mdns_client_unittest.cc",
    ]
  }

  deps = [
    "//base",
    "//net",
    "//net:test_support",
    "//testing/gmock",
    "//testing/gtest",
  ]

  if (enable_net_mojo) {
    deps += [
      "//net/dns:mojo_client",
      "//net/dns:mojo_service",
    ]
  }
}

source_set("test_support") {
  testonly = true
  sources = [
    "dns_test_util.cc",
    "mock_host_resolver.cc",
  ]
  public = [
    "dns_test_util.h",
    "mock_host_resolver.h",
  ]

  if (enable_mdns) {
    sources += [ "mock_mdns_socket_factory.cc" ]
    public += [ "mock_mdns_socket_factory.h" ]
  }

  deps = [
    "//base",
    "//net",
    "//testing/gmock",
    "//testing/gtest",
  ]
}

source_set("fuzzer_test_support") {
  testonly = true
  sources = [
    "fuzzed_host_resolver.cc",
    "fuzzed_host_resolver.h",
  ]
  deps = [
    "//base",
    "//base/test:test_support",
    "//net",
  ]
}

fuzzer_test("net_dns_hosts_parse_fuzzer") {
  sources = [
    "dns_hosts_parse_fuzzer.cc",
  ]
  deps = [
    "//base",
    "//net",
    "//net:net_fuzzer_test_support",
  ]
  dict = "//net/data/fuzzer_dictionaries/net_dns_hosts_parse_fuzzer.dict"
}

fuzzer_test("net_dns_record_fuzzer") {
  sources = [
    "dns_record_fuzzer.cc",
  ]
  deps = [
    "//base",
    "//net",
    "//net:net_fuzzer_test_support",
  ]
  dict = "//net/data/fuzzer_dictionaries/net_dns_record_fuzzer.dict"
}

fuzzer_test("net_host_resolver_impl_fuzzer") {
  sources = [
    "host_resolver_impl_fuzzer.cc",
  ]
  deps = [
    "//base",
    "//net",
    "//net:net_fuzzer_test_support",
    "//net:test_support",
  ]
  dict = "//net/data/fuzzer_dictionaries/net_host_resolver_impl_fuzzer.dict"
}