From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stas Sergeev <stsp@list.ru>
Subject: Re: DOSemu networking made easy
Date: Mon, 24 Jun 2013 20:12:10 +0400
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References: <51C82F2C.5@viste-family.net> <51C84847.60903@list.ru> <51C84EB4.3070000@viste-family.net> <51C85F24.9050809@list.ru> <51C86809.5040001@viste-family.net>
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To: Mateusz Viste <mateusz@viste-family.net>
Cc: linux-msdos@vger.kernel.org, dosemu-devel <dosemu-devel@lists.sourceforge.net>, "Eric W. Biederman" <ebiederm@xmission.com>

Aha, thanks for an explanation!
Now I've started to understand what is this all about. :)
Lets add dosemu-devel and Eric Biederman into CC.
The beginning is here:
http://marc.info/?l=3Dlinux-msdos&m=3D137207433306065&w=3D2

24.06.2013 19:38, Mateusz Viste =D0=BF=D0=B8=D1=88=D0=B5=D1=82:
> It would be really cool to have this incorporated into DOSemu, so for
> example a network configuration could be something like:
>
>   $_pktdriver =3D (on)
>   $_vnet =3D "slirp"
>   $_netdev =3D "/usr/bin/slirp"
>
> And such configuration would provide working network connectivity in
> any situation, without the user having to care about anything (as lon=
g
> as the host would have network itself).
>
> I even looked at DOSemu source code, and locating the point where
> DOSemu opens the TAP interface wasn't a big deal, and it would be eas=
y
> to implement any other alternative channel there, but I could not
> locate the code where DOSemu sends/recv ethernet frames into/from the
> TAP. If anybody tells me where in the code this happens, I might try
> to look further.
Sure: in pktnew.c please find the following:
---
        if (write(pkt_fd, SEG_ADR((char *), ds, si), LWORD(ecx)) >=3D 0=
) {
                    pd_printf("Write to net was ok\n");
                    return 1;
---

and the following:
---
    size =3D read(fd, pkt_buf, PKT_BUF_SIZE);
    if (size < 0) {
        p_stats->errors_in++;           /* select() somehow lied */
        return 0;
---

and that's it. :)
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