--- mediastreamer2-4.5.22/CMakeLists.txt.orig	2021-07-09 20:43:58.295679157 +0200
+++ mediastreamer2-4.5.22/CMakeLists.txt	2021-07-09 21:46:38.291976177 +0200
@@ -81,6 +81,8 @@ option(ENABLE_PACKAGE_SOURCE "Create 'pa
 option(ENABLE_SRTP "Build with the SRTP transport support." YES)
 cmake_dependent_option(ENABLE_ZRTP "Build with ZRTP support." YES "ENABLE_SRTP" NO)
 
+option(ENABLE_UPNP "Build with UPnP support." YES)
+
 option(ENABLE_SOUND "Can be used to turn off all possible sound backends." YES)
 cmake_dependent_option(ENABLE_ALSA "Enable ALSA support." YES "ENABLE_SOUND;LINUX_OR_BSD" NO)
 cmake_dependent_option(ENABLE_ANDROIDSND "Enable Android sound support." NO "ENABLE_SOUND;ANDROID" NO)
@@ -161,6 +163,13 @@ if(ENABLE_PCAP)
 	find_package(PCAP QUIET)
 endif()
 
+if(ENABLE_UPNP)
+	find_library(UPNP upnp)
+	if(NOT UPNP)
+		message(WARNING "Could not find UPNP library.")
+		set(ENABLE_UPNP OFF CACHE BOOL "Build with UPnP support." FORCE)
+	endif()
+endif()
 if(ENABLE_SRTP)
 	find_package(SRTP)
 	if(NOT SRTP_FOUND)
@@ -402,6 +411,11 @@ endif()
 if(HAVE_DLOPEN)
 	list(APPEND LINK_LIBS dl)
 endif()
+if(ENABLE_UPNP)
+	list(APPEND LINK_LIBS upnp ixml)
+	list(APPEND MEDIASTREAMER2_INCLUDE_DIRS /usr/include/upnp)
+	add_definitions(-D_GNU_SOURCE)
+endif()
 if(ALSA_FOUND)
 	list(APPEND LINK_LIBS asound)
 	list(APPEND MEDIASTREAMER2_INCLUDE_DIRS ${ALSA_INCLUDE_DIRS})
--- mediastreamer2-4.5.22/src/CMakeLists.txt.orig	2021-07-09 21:45:54.498880091 +0200
+++ mediastreamer2-4.5.22/src/CMakeLists.txt	2021-07-09 21:45:58.885522993 +0200
@@ -140,6 +140,15 @@ if (APPLE)
         list(APPEND VOIP_SOURCE_FILES_OBJC utils/apple_utils.h utils/apple_utils.m)
 endif()
 
+if(ENABLE_UPNP)
+	list(APPEND VOIP_SOURCE_FILES_C
+		upnp/upnp_igd.c
+		upnp/upnp_igd_private.h
+		upnp/upnp_igd_cmd.c
+		upnp/upnp_igd_utils.c
+		upnp/upnp_igd_utils.h
+	)
+endif()
 if(ENABLE_ALSA)
 	list(APPEND VOIP_SOURCE_FILES_C audiofilters/alsa.c)
 endif()