> Subject: Re: [SCTP-Discussion] Sctplib on Android
> From: Michael.Tuexen AT micmac.franken.de
> Date: Wed, 26 Feb 2014 14:22:08 +0100
> CC: sctp-discussion AT sctp.de; dreibh AT simula.no
> To: daggy2k AT hotmail.com
>
> On Feb 26, 2014, at 1:37 PM, Dag Ove <daggy2k AT hotmail.com> wrote:
>
> > Thank you for quick response!
> >
> > In "Documentation of the SCTP-Implementation - Release: sctplib-1.0"
> > under "2 General Concepts" it says:
> >
> > "All of these functions may be made use of by simply linking the static libsctp-library to an application,
> > and including the file sctp.h. As SCTP operates on top of IP, we chose to open a raw socket to catch
> > all incoming packets with the IP protocol id byte set to 132 (=SCTP). For this, it is necessary that an
> > application using the library functions have privileges to do so. On most Unix machines that means this
> > application has to be run by root (i.e. be made setuid 0)."
> And this is true for running SCTP/IP.
> >
> > After examining the adaption.c file I believe that this is the case also when the macro SCTP_OVER_UDP is set.
> > Since Android does not allow opening of raw socket, i don't think sctplib can be used on Android
> Then this is not implemented in an optimal way. Please note that I moved from developing sctplib
> to the FreeBSD kernel implementation and its port to userland, the usrsctp library.
>
> From my perspective, the sctplib only get bug fixes. Not sure if someone will change the above code.
> Thomas: Do you have any intention to do so?
> > without rooting the Android device.
> >
> > I haven't heard about usrsctp before, but will take a look at it!
> It is the port of the FreeBSD kernel implementation to userland and is
> used for RTCWeb by Firefox, Chrome and Opera.
> > Does it provide the same functionality as sctplib?
> It supports much more features and is actively maintained and used in a couple
> of browsers for RTCWeb. What is the context you want to use SCTP for?
> > Do you know if it has been tested on Android before?
> I think so, since some of the browsers run on Android...
>
> Best regards
> Michael
> >
> > Best Regards,
> > Dag Ove,
> > Norway
> >
> >> Subject: Re: [SCTP-Discussion] Sctplib on Android
> >> From: Michael.Tuexen AT micmac.franken.de
> >> Date: Wed, 26 Feb 2014 12:40:53 +0100
> >> CC: sctp-discussion AT sctp.de
> >> To: daggy2k AT hotmail.com
> >>
> >> On Feb 26, 2014, at 11:25 AM, Dag Ove <daggy2k AT hotmail.com> wrote:
> >>
> >>> Hello,
> >>>
> >>> I am trying to enable SCTP over UDP using the sctplib-1.0.15 as a native library in an Android app, using Androids Native Development Kit (NDK). The installation works since the Android kernel is Linux, but when I call the function "sctp_initLibrary();" I get in return " 1 - adaptation error ". The reason for this is that the function "adl_open_sctp_socket" fails and returns -1 when trying to create a raw socket "sfd = socket(af, SOCK_RAW, IPPROTO_UDP"
> >>> Opening raw sockets in Android is not permitted unless having root access/superuser, and I don't want to root.
> >>>
> >>> My question is: Is it possible to use the sctplib-1.0.15 to send SCTP-over-UDP without having root or superuser?
> >> Im not sure why a raw socket is used. For SCTP/UDP you only need UDP sockets.
> >> You can have a look at usrsctp, which is the FreeBSD stack running in userland,
> >> which does it like that. See
> >> http://code.google.com/p/sctp-refimpl/source/browse/#svn%2Ftrunk%2FKERN%2Fusrsctp
> >>
> >> Best regards
> >> Michael
> >>>
> >>> Best Regards,
> >>> Dag Ove,
> >>> Norway
> >>> _______________________________________________
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> >>> sctp-discussion AT sctp.de
> >>> http://www.sctp.de/mailman/listinfo/sctp-discussion
> >>
>