Skip has the right of it. Found Skip's email just after I figured out from Ron's ratrace hint that it's building a fresh namespace, which means that all my careful network stack setup is for naught.
Now, I don't know *why* it makes up a fresh namespace before binding to /net.alt, but go figure. I think this is a bug in tftpd, which should establish connections *before* rebuilding the namespace. Attached is a patch which does this by moving the setuser() chdir() to after establishing a connection. Feedback? Paul On Mon, Apr 7, 2025 at 2:15 PM Skip Tavakkolian <[email protected]> wrote: > I think a blank namespace is getting built before accessing anything. > looking at the code, it looks like newns() gets called before > announce(). > > On Mon, Apr 7, 2025 at 1:13 PM Paul Lalonde <[email protected]> > wrote: > > > > I'm trying to isolate my plan9 network from the other things running in > my house. > > I have two ports in the back of my cpu/auth box, which I am going to use > as the bridge as well, and a network switch. The switch is connected to > the port on my cpu/auth box that should serve the 192.168.0.0 subnet; the > other port goes to my household router on 192.168.1.0 . > > > > Things *almost* work. In an attempt not to mess my world too much, I'm > setting up my plan9 network on ether1, bound into /net.alt. From there I > successfully serve DHCP to hosts that are connected to my switch by running > this: > > > > bind -b '#l1' /net.alt > > bind -b '#I1' /net.alt > > > > ip/ipconfig -x /net.alt ether /net.alt/ether1 add 192.168.0.2 > 255.255.255.0 > > ndb/cs -x /net.alt -f /lib/ndb/local > > > > ip/dhcpd -x /net.alt 192.168.0.32 16 > > > > But tftp is escaping me. > > When running tftpd I get: > > > > fluxcpu% ip/tftpd -x /net.alt > > ip/tftpd: announcing on /net.alt/udp!*!tftp: announce opening > /net.alt/udp/clone: file does not exist: '/net.alt/udp' > > > > > > But /net.alt/udp is clearly there: > > > > fluxcpu% ls /net.alt/udp > > /net.alt/udp/0 > > /net.alt/udp/1 > > /net.alt/udp/2 > > /net.alt/udp/clone > > /net.alt/udp/stats > > > > Any pointers? > > > > Thanks, > > Paul > > > > 9fans / 9fans / see discussions + participants + delivery options > Permalink ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/Tb7d0bba710659dc0-Mf4824bcedd0727a874e81ce6 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
fix_tftpd.patch
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