From 9553b1b421623b7c51b0b0ad1fe860efc017745c Mon Sep 17 00:00:00 2001
From: Ian Kelling <iank@fsf.org>
Date: Mon, 4 Apr 2022 02:20:25 -0400
Subject: [PATCH] fix pxe

---
 pxe-server      | 17 ++++++++++++++++-
 wrt-setup-local | 11 ++++++++---
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/pxe-server b/pxe-server
index 7405f58..692ffbb 100755
--- a/pxe-server
+++ b/pxe-server
@@ -57,6 +57,21 @@ rm tftpboot
 ln -s <arch/parabola/debian iso dir> tftpboot
 
 
+Notes on debugging pxe dhcp tftp:
+
+For debugging dhcp, add to /etc/dnsmasq.conf: log-dhcp
+
+Newer openwrt runs dnsmasq with a whitelist of readable files and dirs:
+
+ps ww :
+/sbin/ujail -t 5 -n dnsmasq -u -l -r /bin/ubus -r /etc/TZ -r /etc/dnsmasq.conf -r /etc/ethers -r /etc/group -r /etc/hosts -r /etc/passwd -w /tmp/dhcp.leases -r /tmp/dnsmasq.d -r /tmp/hosts -r /tmp/resolv.conf.d -r /usr/bin/jshn -r /usr/lib/dnsmasq/dhcp-script.sh -r /usr/share/dnsmasq/dhcpbogushostname.conf -r /usr/share/dnsmasq/rfc6761.conf -r /usr/share/dnsmasq/trust-anchors.conf -r /usr/share/libubox/jshn.sh -r /var/etc/dnsmasq.conf.cfg01411c -w /var/run/dnsmasq/ -- /usr/sbin/dnsmasq -C /var/etc/dnsmasq.conf.cfg01411c -k -x /var/run/dnsmasq/dnsmasq.cfg01411c.pid
+
+logging tftp requests:
+/etc/default/tftpd-hpa:
+add -vv:
+TFTP_OPTIONS="--secure -vv"
+jr -u tftpd-hpa -f
+
 Note: Uses GNU getopt options parsing style
 EOF
   exit $1
@@ -206,7 +221,7 @@ EOF
   else
     e "updating dnsmasq.conf:"
     m $cmd
-    ${cmd:-:}|ssh cmc "dd of=/etc/dnsmasq-dhcpopts.conf; /etc/init.d/dnsmasq reload
+    ${cmd:-:}|ssh cmc "dd of=/var/run/dnsmasq/dhcpopts.conf; /etc/init.d/dnsmasq reload
 $([[ $type == arch || $type == parabola ]] && echo archlike-pxe-mount)"
   fi
 }
diff --git a/wrt-setup-local b/wrt-setup-local
index c430800..5095678 100755
--- a/wrt-setup-local
+++ b/wrt-setup-local
@@ -1103,6 +1103,7 @@ dhcp-host=00:26:b6:f6:0f:e9,set:frodow,$l.28,frodow
 dhcp-host=70:a6:cc:3a:bb:b4,set:bow,$l.29,bow
 dhcp-host=6c:56:97:88:7b:74,set:amazontab,$l.31,amazontab
 dhcp-host=0a:8a:9b:cf:b5:ec,set:samsungtab,$l.32,samsungtab
+dhcp-host=b8:27:eb:78:21:1d,set:pi3b,$l.33,pi3b
 
 
 
@@ -1117,12 +1118,16 @@ dhcp-host=b4:75:0e:94:29:ca,set:switch9429ca,$l.251,switch9429ca
 # template
 # dhcp-host=,$l.,
 
-# uncomment to do tftpboot. openwrt snapshot from 2022-01, seems like it cant
-# access /mnt/usb/tftpboot due to some jail or sandbox thing
+# pxe tftpboot for arch-like. todo: openwrt snapshot from 2022-01, it cant
+# access /mnt/usb/tftpboot due to ujail sandbox
 #enable-tftp=br-lan
 #tftp-root=/mnt/usb/tftpboot
-#dhcp-optsfile=/etc/dnsmasq-dhcpopts.conf
+#tftp-root=/var/run/dnsmasq/tftpboot
 
+
+dhcp-optsfile=/var/run/dnsmasq/dhcpopts.conf
+
+# for debugging dhcp
 #log-queries=extra
 EOF
 
-- 
2.30.2