src/lib/dnssd/minimal_mdns/BUILD.gn

# Copyright (c) 2020 Project CHIP Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import("//build_overrides/chip.gni")

declare_args() {
  # Makes unicast queries use a separate UDP endpoint that have an ephemeral port
  #
  # In practice this means unicast replies will be received on a dedicated port
  # and will work even if competing mdns servers (including other chip apps)
  # run on the same machine.
  #
  # Downside is that replies sent to a port other than 5353 are considered
  # LEGACY by mDNS and will include the query section in them (i.e. larger
  # payloads) and clients need to allocate more resources for this (need one
  # more UDP socket and corresponding code for the unicast query sending)
  chip_use_ephemeral_port_for_mdns_unicast_query =
      current_os == "mac" || current_os == "linux" || current_os == "android"
}

config("config") {
  defines = []

  if (chip_use_ephemeral_port_for_mdns_unicast_query) {
    defines += [ "CHIP_MINMDNS_USE_EPHEMERAL_UNICAST_PORT=1" ]
  } else {
    defines += [ "CHIP_MINMDNS_USE_EPHEMERAL_UNICAST_PORT=0" ]
  }
}

static_library("minimal_mdns") {
  sources = [
    "ActiveResolveAttempts.cpp",
    "ActiveResolveAttempts.h",
    "Parser.cpp",
    "Parser.h",
    "Query.h",
    "QueryBuilder.h",
    "QueryReplyFilter.h",
    "RecordData.cpp",
    "RecordData.h",
    "ResponseBuilder.h",
    "ResponseSender.cpp",
    "ResponseSender.h",
    "Server.cpp",
    "Server.h",
  ]

  public_deps = [
    "${chip_root}/src/inet",
    "${chip_root}/src/lib/core",
    "${chip_root}/src/lib/dnssd/minimal_mdns/core",
    "${chip_root}/src/lib/dnssd/minimal_mdns/responders",
    "${chip_root}/src/platform",
  ]

  public_configs = [ ":config" ]
}