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tools's Issues

rtr7-recovery-init does not boot?!

Not quite sure what’s happening. The router loads bootx64.efi, ldlinux.e64, vmlinuz and the initrd, but then the screen stays black (haven’t checked serial output yet) and eventually the router reboots.

rtr7-recover: incorrect error reporting

This use of errgroups silently swallows errors:

tools/cmd/rtr7-recover/recover.go

Lines 287 to 293 in a3520bc

eg.Go(func() error { return dhcp4.Serve(cn, handler) })
cn4011, err := conn.NewUDP4BoundListener(*ifname, ":4011")
if err != nil {
return fmt.Errorf("NewUDP4BoundListener(%q, %q): %v", *ifname, ":67", err)
}
eg.Go(func() error { return dhcp4.Serve(cn4011, handler) })

The problem is that eg.Wait() “blocks until all function calls from the Go method have returned”, even if any of the methods returned an error.

One way to fix this is to use errgroup.WithContext and thereby cancel the other goroutines.

rtr7-recover: hands out DHCP leases to other devices after initial PXE lease

Looks like the MAC address filter is still not quite right:

2022/06/24 08:49:50 [dhcp] dc:a6:32:02:ba:2f DHCPDISCOVER → ignore (PXEClient vendor class option not found)
2022/06/24 08:49:51 [dhcp] b4:fb:e4:e0:da:93 DHCPDISCOVER → ignore (PXEClient vendor class option not found)
2022/06/24 08:49:52 [dhcp] a8:a1:59:3a:9c:55 DHCPREQUEST → DHCPACK
2022/06/24 08:49:52 [dhcp] a8:a1:59:3a:9c:55 DHCPREQUEST → DHCPACK
2022/06/24 08:49:53 [tftp] bootx64.efi: sending block 0: code=8, error: User aborted the transfer
2022/06/24 08:49:53 [dhcp] b4:fb:e4:e0:da:93 DHCPDISCOVER → DHCPNAK (a8:a1:59:3a:9c:55 is the first PXE client)
2022/06/24 08:49:53 [tftp] bootx64.efi: success
2022/06/24 08:49:53 [dhcp] a8:a1:59:3a:9c:55 DHCPDISCOVER → DHCPOFFER
2022/06/24 08:49:56 [dhcp] dc:a6:32:02:ba:14 DHCPDISCOVER → DHCPNAK (a8:a1:59:3a:9c:55 is the first PXE client)
2022/06/24 08:49:56 [dhcp] dc:a6:32:02:ba:2f DHCPDISCOVER → DHCPNAK (a8:a1:59:3a:9c:55 is the first PXE client)
2022/06/24 08:49:57 [dhcp] b4:fb:e4:e0:da:93 DHCPDISCOVER → DHCPNAK (a8:a1:59:3a:9c:55 is the first PXE client)
2022/06/24 08:49:57 [dhcp] a8:a1:59:3a:9c:55 DHCPREQUEST → DHCPACK
2022/06/24 08:49:57 [tftp] ldlinux.e64: success
2022/06/24 08:49:57 [tftp] pxelinux.cfg/01-a8-a1-59-3a-9c-55: file not found
2022/06/24 08:49:57 [tftp] pxelinux.cfg/0A000001: file not found
2022/06/24 08:49:57 [tftp] pxelinux.cfg/0A00000: file not found
2022/06/24 08:49:57 [tftp] pxelinux.cfg/0A0000: file not found
2022/06/24 08:49:57 [tftp] pxelinux.cfg/0A000: file not found
2022/06/24 08:49:57 [tftp] pxelinux.cfg/0A00: file not found
2022/06/24 08:49:57 [tftp] pxelinux.cfg/0A0: file not found
2022/06/24 08:49:57 [tftp] pxelinux.cfg/0A: file not found
2022/06/24 08:49:57 [tftp] pxelinux.cfg/0: file not found
2022/06/24 08:49:57 [tftp] pxelinux.cfg/default: success
2022/06/24 08:49:59 [tftp] vmlinuz: success
2022/06/24 08:50:01 [dhcp] 5c:96:66:4e:be:ea DHCPDISCOVER → DHCPOFFER
2022/06/24 08:50:01 [dhcp] 5c:96:66:4e:be:ea DHCPREQUEST → DHCPACK

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