# 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("//net/features.gni")

enable_built_in_dns = !is_ios

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

  # Internals only intended for use inside network stack (and tests).
  friend = [
    "//net/*",
  ]

  public = []
  sources = [
    "address_info.cc",
    "address_info.h",
    "address_sorter.h",
    "context_host_resolver.cc",
    "context_host_resolver.h",
    "dns_alias_utility.cc",
    "dns_alias_utility.h",
    "dns_config.cc",
    "dns_config_service.cc",
    "dns_config_service.h",
    "dns_hosts.cc",
    "dns_hosts.h",
    "dns_query.cc",
    "dns_query.h",
    "dns_reloader.cc",
    "dns_reloader.h",
    "dns_response.cc",
    "dns_response_result_extractor.cc",
    "dns_response_result_extractor.h",
    "dns_server_iterator.cc",
    "dns_server_iterator.h",
    "dns_session.cc",
    "dns_session.h",
    "dns_transaction.cc",
    "dns_udp_tracker.cc",
    "dns_udp_tracker.h",
    "dns_util.cc",
    "dns_util.h",
    "host_cache.cc",
    "host_resolver.cc",
    "host_resolver_manager.cc",
    "host_resolver_mdns_listener_impl.cc",
    "host_resolver_mdns_listener_impl.h",
    "host_resolver_mdns_task.cc",
    "host_resolver_mdns_task.h",
    "host_resolver_proc.cc",
    "host_resolver_proc.h",
    "host_resolver_results.cc",
    "https_record_rdata.cc",
    "httpssvc_metrics.cc",
    "httpssvc_metrics.h",
    "mapped_host_resolver.cc",
    "nsswitch_reader.cc",
    "nsswitch_reader.h",
    "record_parsed.cc",
    "record_rdata.cc",
    "resolve_context.cc",
    "resolve_context.h",
    "serial_worker.cc",
    "serial_worker.h",
    "system_dns_config_change_notifier.cc",
    "system_dns_config_change_notifier.h",
    "test_dns_config_service.cc",
    "test_dns_config_service.h",
  ]

  if (is_win) {
    sources += [
      "address_sorter_win.cc",
      "dns_config_service_win.cc",
      "dns_config_service_win.h",
    ]
  }

  if (is_mac) {
    sources += [
      "dns_config_watcher_mac.cc",
      "dns_config_watcher_mac.h",
      "notify_watcher_mac.cc",
      "notify_watcher_mac.h",
    ]
  }

  if (is_fuchsia) {
    sources += [
      "dns_config_service_fuchsia.cc",
      "dns_config_service_fuchsia.h",
    ]
  }

  if (is_android) {
    sources += [
      "dns_config_service_android.cc",
      "dns_config_service_android.h",
    ]
  } else if (is_linux) {
    sources += [
      "dns_config_service_linux.cc",
      "dns_config_service_linux.h",
    ]
  } else if (is_posix) {
    sources += [
      "dns_config_service_posix.cc",
      "dns_config_service_posix.h",
    ]
  }

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

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

  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_manager",
    ":mdns_client",
    "//net:net_public_deps",
  ]

  allow_circular_includes_from = [
    ":dns_client",
    ":host_resolver",
    ":host_resolver_manager",
    ":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",
    ":dns_client",
    ":host_resolver_manager",
    ":mdns_client",
    "//net",
  ]

  # Restricted access so we can keep track of all usage external to the
  # network stack and network service.
  friend = [
    "//net/*",
  ]

  sources = [
    "dns_config.h",
    "host_cache.h",
    "host_resolver.h",
    "host_resolver_results.h",
    "mapped_host_resolver.h",
  ]
  public = []

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

  allow_circular_includes_from = [ "//net/dns/public" ]
}

# Shared mostly-global handler of HostResolver requests.
#
# Typically should only be directly interacted with by NetworkService (or other
# mostly-global creators of request contexts), standalone tools, and tests. Host
# resolution should generally instead go through HostResolvers received from
# URLRequestContext or network service Mojo IPCs.
source_set("host_resolver_manager") {
  # 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",
    "//net",
  ]

  # Restricted access so we can keep track of all usage external to the
  # network stack and network service.
  friend = [
    "//net/*",
  ]

  sources = [ "host_resolver_manager.h" ]
  public = []

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

# DnsClient interfaces. Primarily intended as part of the implementation of the
# standard HostResolver interface, but can be used as an alternative external
# interface for advanced usage.
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",
  ]

  # Restricted access so we can keep track of all usage external to the
  # network stack.
  friend = [
    "//net/*",
  ]

  sources = [
    "dns_client.h",
    "dns_response.h",
    "dns_transaction.h",
    "https_record_rdata.h",
    "record_parsed.h",
    "record_rdata.h",
  ]
  public = []

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

# MdnsClient interfaces.
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",
  ]

  # Restricted access so we can keep track of all usage external to the
  # network stack.
  friend = [
    "//net/*",
  ]

  public = []
  sources = []

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

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