Invitation-generated tinc-up tries to set address/route before bringing up interface

[genpfault]

Trying to join an invitation URL on a Linux host results in this sort of tinc-up script:

Please review the following tinc-up script:

#!/bin/sh
ip addr replace 172.16.1.3 dev "$INTERFACE"
ip route add 172.16.1.0/24 dev "$INTERFACE"
ip link set "$INTERFACE" up

Do you want to use this script [y]es/[n]o/[e]dit?

Unfortunately adding addresses/routes before bringing up the interface doesn't work:

$ journalctl -u [email protected] --follow
Mar 20 12:22:01 newnode systemd[1]: Started [email protected] - Tinc net netname.
Mar 20 12:22:01 newnode tincd[12370]: tincd 1.1~pre18 (Jun 27 2021 18:10:22) starting, debug level 0
Mar 20 12:22:01 newnode tincd[12370]: /dev/net/tun is a Linux tun/tap device (tun mode)
Mar 20 12:22:01 newnode tincd[12375]: Error: Device for nexthop is not up.
Mar 20 12:22:01 newnode tincd[12370]: Ready

Putting the interface bring-up first:

#!/bin/sh
ip link set "$INTERFACE" up
ip addr replace 172.16.1.3 dev "$INTERFACE"
ip route add 172.16.1.0/24 dev "$INTERFACE"

...fixes it:

$ journalctl -u [email protected] --follow
Mar 20 12:25:27 newnode systemd[1]: Started [email protected] - Tinc net netname.
Mar 20 12:25:27 newnode tincd[12621]: tincd 1.1~pre18 (Jun 27 2021 18:10:22) starting, debug level 0
Mar 20 12:25:27 newnode tincd[12621]: /dev/net/tun is a Linux tun/tap device (tun mode)
Mar 20 12:25:27 newnode tincd[12621]: Ready

Dug up a SuperUser question/answer going over the differences between the old ifconfig command and the newer iproute2 stuff.

System information:

• OS: amd64 Debian 12/Bookworm

• Tinc built/installed via the Debian experimental package:

  dget https://deb.debian.org/debian/pool/main/t/tinc/tinc_1.1~pre18-1.dsc
  cd tinc-1.1~pre18/
  debuild -b -uc -us
  cd ..
  sudo mkdir -p /etc/tinc
  sudo dpkg -i tinc_1.1~pre18-1_amd64.deb