UpnpInit2(...) returns UPNP_E_SOCKET_BIND error

[jaehyung-po]

First, Thank you for providing this library.

I use pupnp like this way below.(in c++)

1. class UpnpDevice is a threaded object.

2. UpnpDevice Initializes UPnP(initialize upnp, get ip and port, set web server root directory, register root device,...) in the constructor and starts thread.

3. UpnpDevice finishes UPnP(I mean UpnpFinish()) in destructor.

4. When I create unique pointer in other class(I would call it Handler from now on) and set a network interface name to execute UpnpInit2(...), It works fine.

5. Now, There is a situation that network interface or IP is changed.

6. Handler catches that situation and resets UpnpDevice object and sets new network interface name.

7. Then, UpnpInit2(...) returns UPNP_E_SOCKET_BIND error forever.(in while loop, it tried to UpnpInit2(..), UpnpGetServerIpAddress() and UpnpGetServerPort() until it returns UPNP_E_SUCCESS)

8. EXCEPTION : If network interface name and ip are same, then it initialized well.

I tried to debug and found the code returning that value.
pupnp > upnp > src > genlib > miniserver > miniserver.c > get_miniserver_sockets > #ifdef UPNP_ENABLE_IPV6

so, In the same code, I disabled IPV6 by configure --disable-ipv6. (I don't need ipv6)
And It worked well.

I'm using linux, and I don't know how to find the version of this pupnp code.
I'll post the version if you tell me the way to get the version.

Thank you.

[mrjimenez]

Hi and welcome jaehyung-po,

There are many ways to find the version of the library. Since you are developing code and linking against it, you can be using a pre-compiled version supplied by your linux distribution or you could have compiled the library from the source code. Since you do not know the version, it is likely that you have it from the linux distro, in which case you should check the package version (rpm or deb)?

If you are able to find a file named upnpconfig.h, you can read the version in a define called UPNP_VERSION_STRING.

You might also try to compile libupnp from the source code to use the latest updates and bug fixes. Github makes it convenient if you can use git, but this is not required.

Regards,
Marcelo.

[jaehyung-po]

The version I'm using is 1.12.0.
I got the version number by printing UPNP_VERSION_STRING.

and I tried with 1.14.0, but it has same issue.

Additionally, I found the side effect of disabling ipv6. (on version 1.12.0)

1. I'm using my program as linux service.
2. When i disable ipv6 in pupnp, upnp that is executed first after the boot of linux device does not work.
   (even upnp methods return success value)
3. if i stop service and restart service or program, upnp works.
4. It is not important that the program is service or not.
   First upnp initialization does not work after the boot or installation of pupnp without ipv6,
   even though upnp methods return success.

Thank you for reading.

[mrjimenez]

Hi,

Sorry for the late reply.

If these are still issues, we need an objective way to test them, otherwise it gets too hard.

Maybe you could modify the sample code tv_device to try to illustrate the issue there.

Regards,
Marcelo.