+#!/bin/bash
+# Copyright (C) 2016 Ian Kelling
+
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+set -eE -o pipefail
+trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
+
+
+pmirror() {
+ # background: upgrading all packages is not recommended because it
+ # doesn't go into the firmware. build new firmware if you want
+ # lots of upgrades. I think /tmp/opkg-lists is a pre openwrt 14 location.
+ f=(/tmp/opkg-lists/* /var/opkg-lists/*)
+ if ! (( $(date -r $f +%s) + 60*60*24 > $(date +%s) )); then
+ opkg update
+ fi
+}
+
+pi() {
+ for x in "$@"; do
+ if [[ ! $(opkg list-installed "$x") ]]; then
+ pmirror
+ opkg install "$@"
+ fi
+ done
+}
+
+v() {
+ printf "+ %s\n" "$*"
+ "$@"
+}
+
+### network config
+###
+l=10.0.0
+lan=10.0.0.0
+mask=255.255.0.0
+
+cat >/usr/bin/arch-pxe-mount <<'EOFOUTER'
+#!/bin/bash
+# symlinks are collapsed for nfs mount points, so use a bind mount.
+# tried putting this in /etc/config/fstab,
+# then doig block mount, it didn't work. This doesn't persist across reboots,
+# todo: figure that out
+d=/run/archiso/bootmnt
+cat > /etc/fstab <<EOF
+/mnt/usb/tftpboot $d none bind 0 0
+EOF
+mount | grep $d &>/dev/null || mount $d
+/etc/init.d/nfsd restart
+EOFOUTER
+chmod +x /usr/bin/arch-pxe-mount
+
+cat >.profile <<'EOF'
+# changing login shell emits spam on ssh single commands & scp
+ # sed -i 's#/bin/ash$#/bin/bash#' /etc/passwd
+# https://github.com/openwrt/packages/issues/6137
+[ "$BASH_VERSION" != "" ] || exec /bin/bash -i
+EOF
+v pi kmod-usb-storage block-mount kmod-fs-ext4 nfs-kernel-server \
+ tcpdump openvpn-openssl adblock
+
+
+
+sed -ri "s/option[[:space:]]+encryption[[:space:]].*/option encryption psk2/;s/option[[:space:]]+key.*/option key pictionary49/" /etc/config/wireless
+sed -i '/^[[:space:]]*option disabled/d' /etc/config/wireless
+v wifi
+
+
+v /etc/init.d/fstab enable ||:
+
+# rebooting makes mounting work, but comparing lsmod,
+# i'm guessing this will too. todo, test it.
+# 255 == module already loaded
+for mod in scsi_mod sd_mod; do v modprobe $mod || [[ $? == 255 ]]; done
+
+# for arch pxe. The default settings in the installer expect to find
+# the NFS at /run/archiso/bootmnt
+mkdir -p /run/archiso/bootmnt
+
+# todo: at some later time, i found /mnt/usb not mounted, watch to see if
+# that is the case after running this or rebooting.
+# wiki says safe to do in case of fstab changes:
+
+## ian: usb broke on old router. if that happens, can just comment this to disable problems
+echo | cedit /etc/config/fstab ||:
+cedit /etc/config/fstab <<'EOF' || { v block umount; v block mount; }
+config global automount
+ option from_fstab 1
+ option anon_mount 1
+
+config mount
+ option target /mnt/usb
+ option device /dev/sda1
+ option fstype ext4
+ option options rw,async,noatime,nodiratime
+ option enabled 1
+EOF
+
+
+# ian: disabled because afaik I don't need it, no benefit.
+# config global autoswap
+# option from_fstab 1
+# option anon_swap 1
+
+# config swap
+# option device /dev/sda1
+# option enabled 1
+
+
+
+
+# exportfs -ra wont cut it when its the same path, but now a bind mount
+cedit /etc/exports <<EOF || v /etc/init.d/nfsd restart ||:
+/mnt/usb $lan/$netmask(rw,no_root_squash,insecure,sync,no_subtree_check)
+# for arch pxe
+/run/archiso/bootmnt $lan/$netmask(rw,no_root_squash,insecure,sync,no_subtree_check)
+EOF
+
+
+v /etc/init.d/portmap start
+v /etc/init.d/nfsd start
+v /etc/init.d/portmap enable
+v /etc/init.d/nfsd enable
+
+
+
+
+
+
+######### uci example:#######
+# # https://wiki.openwrt.org/doc/uci
+# wan_index=$(uci show firewall | sed -rn 's/firewall\.@zone\[([0-9])+\]\.name=wan/\1/p')
+# wan="firewall.@zone[$wan_index]"
+# if [[ $(uci get firewall.@forwarding[0].dest) != $forward_dest ]]; then
+# # default is wan
+# v uci set firewall.@forwarding[0].dest=$forward_dest
+# uci commit firewall
+# firewall_restart=true
+# fi
+
+
+
+########## openvpn exampl
+########## missing firewall settings for routing lan
+########## traffic
+# v /etc/init.d/openvpn start
+# v /etc/init.d/openvpn enable
+
+# # from https://wiki.openwrt.org/doc/uci/firewall
+# # todo: not sure if /etc/init.d/network needs restarting.
+# # I did, and I had to restart the vpn afterwards.
+# # This maps a uci interface to a real interface which is
+# # managed outside of uci.
+# v cedit /etc/config/network <<'EOF' ||:
+# config interface 'tun0'
+# option ifname 'tun0'
+# option proto 'none'
+# EOF
+# v cedit /etc/config/openvpn <<'EOF' || v /etc/init.d/openvpn restart
+# config openvpn my_client_config
+# option enabled 1
+# option config /etc/openvpn/client.conf
+# EOF
+
+
+v cedit /etc/config/network <<EOF || v /etc/init.d/network reload
+config 'route' 'transmission'
+ option 'interface' 'lan'
+ option 'target' '10.173.0.0'
+ option 'netmask' '255.255.0.0'
+ option 'gateway' '$l.3'
+EOF
+
+v cedit /etc/config/firewall <<EOF || firewall_restart=true
+config redirect
+ option name ssh
+ option src wan
+ option src_dport 22
+ option dest_ip $l.8
+ option dest lan
+config rule
+ option src wan
+ option target ACCEPT
+ option dest_port 22
+
+config redirect
+ option name sshalt
+ option src wan
+ option src_dport 2222
+ option dest_port 22
+ option dest_ip $l.3
+ option dest lan
+config rule
+ option src wan
+ option target ACCEPT
+ option dest_port 2222
+
+config redirect
+ option src wan
+ option src_dport 443
+ option dest lan
+ option dest_ip $l.8
+ option proto tcp
+config rule
+ option src wan
+ option target ACCEPT
+ option dest_port 443
+ option proto tcp
+
+config redirect
+ option src wan
+ option src_dport 1196
+ option dest lan
+ option dest_ip $l.8
+ option proto udp
+config rule
+ option src wan
+ option target ACCEPT
+ option dest_port 1196
+ option proto udp
+
+
+config redirect
+ option src wan
+ option src_dport 80
+ option dest lan
+ option dest_ip $l.8
+ option proto tcp
+config rule
+ option src wan
+ option target ACCEPT
+ option dest_port 80
+ option proto tcp
+
+config redirect
+ option name syncthing
+ option src wan
+ option src_dport 22001
+ option dest_ip $l.8
+ option dest lan
+config rule
+ option src wan
+ option target ACCEPT
+ option dest_port 22001
+
+
+
+EOF
+
+
+
+
+dnsmasq_restart=false
+mail_host=$(grep -F mail.iankelling.org /etc/hosts | awk '{print $1}')
+v cedit /etc/hosts <<EOF || dnsmasq_restart=true
+127.0.1.1 wrt
+$l.1 wrt
+$l.2 kd
+$l.3 frodo
+$l.4 htpc
+$l.5 x2
+$l.6 demohost
+#$l.7 faiserver
+$l.8 tp faiserver b8.nz
+$l.9 n5
+$l.10 so
+$l.12 fz
+72.14.176.105 li
+45.33.9.11 lj
+138.68.10.24 dopub
+# netns creation looks for next free subnet starting at 10.173, but I only
+# use one, and I would keep this one as the first created.
+10.173.0.2 transmission
+EOF
+
+# if [[ $mail_host ]]; then
+# sed -i '/^$mail_host/a mail.iankelling.org' /etc/hosts
+# fi
+
+
+# avoid using the dns servers that my isp tells me about.
+if [[ $(uci get dhcp.@dnsmasq[0].resolvfile 2>/dev/null) ]]; then
+ # default is '/tmp/resolv.conf.auto', we switch to the dnsmasq default of
+ # /etc/resolv.conf. not sure why I did this.
+ v uci delete dhcp.@dnsmasq[0].resolvfile
+ uci commit dhcp
+ dnsmasq_restart=true
+fi
+
+if [[ $(uci get dhcp.@dnsmasq[0].domain) != b8.nz ]]; then
+ v uci set dhcp.@dnsmasq[0].domain=b8.nz
+ uci commit dhcp
+ dnsmasq_restart=true
+fi
+if [[ $(uci get dhcp.@dnsmasq[0].local) != b8.nz ]]; then
+ v uci set dhcp.@dnsmasq[0].local=/b8.nz/
+ uci commit dhcp
+ dnsmasq_restart=true
+fi
+
+if [[ $(uci get system.@system[0].hostname) != wrt ]]; then
+ v uci set system.@system[0].hostname=wrt
+ uci commit system
+fi
+
+
+if [[ $(uci get adblock.global.adb_enabled) != 1 ]]; then
+ v uci set adblock.global.adb_enabled=1
+ uci commit adblock
+ /etc/init.d/adblock restart
+fi
+# https://github.com/openwrt/packages/tree/master/net/adblock/files
+cat >/etc/crontabs/root <<'EOF'
+0 06 * * * /etc/init.d/adblock reload
+EOF
+
+
+# useful: http://wiki.openwrt.org/doc/howto/dhcp.dnsmasq
+
+# sometimes /mnt/usb fails, cuz it's just a flash drive,
+# so make sure we have this dir or else dnsmasq will fail
+# to start.
+mkdir -p /mnt/usb/tftpboot
+v cedit /etc/dnsmasq.conf <<EOF || dnsmasq_restart=true
+
+# https://ret2got.wordpress.com/2018/01/19/how-your-ethereum-can-be-stolen-using-dns-rebinding/
+stop-dns-rebind
+
+# this says the ip of default gateway and dns server,
+# but I think they are unneded and default
+#dhcp-option=3,$l.1
+#dhcp-option=6,$l.1
+
+
+
+# results from googling around dnsmasq optimizations
+# about 50k in memory. router has 62 megs.
+# in a browsing session, I probably won't ever do 5000 lookups
+# before the ttl expiration or whatever does expiration.
+cache-size=10000
+
+# ask all servers, use the one which responds first.
+# http://ma.ttwagner.com/make-dns-fly-with-dnsmasq-all-servers/
+all-servers
+
+# namebench benchmarks dns servers. google's dns was only
+# slightly less fast than some others, and I trust it more
+# to give accurate results, stay relatively fast, and
+# not do anythin too malicious, so just use that.
+# download namebench and run it like this:
+# for x in all regional isp global preferred nearby; do ./namebench.py -s \$x -c US -i firefox -m weighted -J 10 -w; echo \$x; hr; done
+# google
+server=8.8.4.4
+server=8.8.8.8
+server=2001:4860:4860::8888
+server=2001:4860:4860::8844
+
+
+# to fixup existin ips, on the client you can do
+# sudo dhclient -r; sudo dhclient <interface-name>
+
+# default dhcp range is 100-150
+# bottom port, iPXE (PCI 03:00.0) in seabios boot menu
+dhcp-host=c8:60:00:31:6b:75,set:kd,$l.2,kd
+# top port, iPXE (PCI 04:00.0) in seabios boot menu
+#dhcp-host=c8:60:00:2b:15:07,set:kd,$l.2,kd
+dhcp-host=00:26:18:97:bb:16,set:frodo,$l.3,frodo
+dhcp-host=10:78:d2:da:29:22,set:htpc,$l.4,htpc
+dhcp-host=00:1f:16:16:39:24,set:x2,$l.5,x2
+#dhcp-host=00:c0:ca:27:e9:b2,set:x2w,$l.11,x2w
+#wireless interface
+# this is so fai can have an explicit name to use for testing,
+# or else any random machine which did a pxe boot would get
+# reformatted. The mac is from doing a virt-install, cancelling it,
+# and copying the generated mac, so it should be randomish.
+dhcp-host=52:54:00:9c:ef:ad,set:demohost,$l.6,demohost
+#dhcp-host=52:54:00:56:09:f9,set:faiserver,$l.7,faiserver
+dhcp-host=80:fa:5b:1c:6e:cf,set:tp,$l.8,tp
+# this is the ip it picks by default if dhcp fails,
+# so might as well use it.
+# hostname is the name it uses according to telnet
+dhcp-host=b4:75:0e:94:29:ca,set:switch9429ca,$l.251,switch9429ca
+
+# template
+# dhcp-host=,$l.,
+
+# Just leave the tftp server up even if we aren't doing pxe boot.
+# It has no sensitive info.
+enable-tftp=br-lan
+tftp-root=/mnt/usb/tftpboot
+EOF
+
+if $dnsmasq_restart; then
+ v /etc/init.d/dnsmasq restart
+fi
+
+if $firewall_restart; then
+ v /etc/init.d/firewall restart
+fi