isc-dhcp: T5965: add custom package build with dhclient patches for WWAN

7 files changed, 549 insertions, 0 deletions

diff --git a/packages/isc-dhcp/.gitignore b/packages/isc-dhcp/.gitignore
new file mode 100644
index 00000000..d2c5a2db
--- /dev/null
+++ b/packages/isc-dhcp/.gitignore
@@ -0,0 +1 @@
+isc-dhcp/
diff --git a/packages/isc-dhcp/Jenkinsfile b/packages/isc-dhcp/Jenkinsfile
new file mode 100644
index 00000000..02af15d9
--- /dev/null
+++ b/packages/isc-dhcp/Jenkinsfile
@@ -0,0 +1,32 @@
+// Copyright (C) 2024 VyOS maintainers and contributors
+//
+// This program is free software; you can redistribute it and/or modify
+// in order to easy exprort images built to "external" world
+// it under the terms of the GNU General Public License version 2 or later as
+// published by the Free Software Foundation.
+//
+// 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, see <http://www.gnu.org/licenses/>.
+@NonCPS
+
+// Using a version specifier library, use 'current' branch. The underscore (_)
+// is not a typo! You need this underscore if the line immediately after the
+// @Library annotation is not an import statement!
+@Library('vyos-build@current')_
+
+// NOTE: we can build with -d as the libbpf dependency is installed manually
+// and not via a DEB package
+def pkgList = [
+    ['name': 'isc-dhcp',
+     'scmCommit': 'debian/4.4.3-P1-4',
+     'scmUrl': 'https://salsa.debian.org/debian/isc-dhcp',
+     'buildCmd': 'sudo mk-build-deps --install --tool "apt-get --yes --no-install-recommends"; cd ..; ./build.sh'],
+]
+
+// Start package build using library function from https://github.com/vyos/vyos-build
+buildPackage('isc-dhcp', pkgList, null, true, "**/packages/isc-dhcp/**")
diff --git a/packages/isc-dhcp/build.sh b/packages/isc-dhcp/build.sh
new file mode 100755
index 00000000..0d206153
--- /dev/null
+++ b/packages/isc-dhcp/build.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+CWD=$(pwd)
+set -e
+
+SRC=isc-dhcp
+if [ ! -d ${SRC} ]; then
+    echo "Source directory does not exists, please 'git clone'"
+    exit 1
+fi
+
+cd ${SRC}
+PATCH_DIR=${CWD}/patches
+for patch in $(ls ${PATCH_DIR})
+do
+    echo "I: Copy patch: ${PATCH_DIR}/${patch}"
+    cp ${PATCH_DIR}/${patch} debian/patches/${patch}
+    echo ${patch} >> debian/patches/series
+done
+
+echo "I: Build Debian Package"
+dpkg-buildpackage -uc -us -tc -b -d
diff --git a/packages/isc-dhcp/patches/0001-Add-support-for-raw-IP-interface-type.patch b/packages/isc-dhcp/patches/0001-Add-support-for-raw-IP-interface-type.patch
new file mode 100644
index 00000000..c13569ad
--- /dev/null
+++ b/packages/isc-dhcp/patches/0001-Add-support-for-raw-IP-interface-type.patch
@@ -0,0 +1,248 @@
+From 8d9e8ace96ad9e2dba9f2d4069228dee5daf6772 Mon Sep 17 00:00:00 2001
+From: Loic Poulain <loic.poulain@linaro.org>
+Date: Mon, 2 Nov 2020 06:42:12 -0500
+Subject: [PATCH 1/4] Add support for raw IP interface type
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Under linux some devices can expose raw IP interfaces, such as WWAN
+modems. In that case IP data is not encapsulated in any lower level
+protocol.
+
+dhclient does not support this currently and this patch adds support
+for such pure IP interfaces.
+
+The original patch comes from Bjørn Mork on Network-Manage mailing list:
+https://mail.gnome.org/archives/networkmanager-list/2015-December/msg00044.html
+
+---
+ common/bpf.c    | 60 ++++++++++++++++++++++++++++++++++++++++++++++++-
+ common/lpf.c    | 59 +++++++++++++++++++++++++++++++++++++-----------
+ common/packet.c |  7 ++++++
+ includes/dhcp.h |  1 +
+ 4 files changed, 113 insertions(+), 14 deletions(-)
+
+diff --git a/common/bpf.c b/common/bpf.c
+index 658e5db..0c08574 100644
+--- a/common/bpf.c
++++ b/common/bpf.c
+@@ -198,6 +198,34 @@ struct bpf_insn dhcp_bpf_filter [] = {
+ 	BPF_STMT (BPF_RET + BPF_K, 0),
+ };
+ 
++int dhcp_bpf_filter_len = sizeof dhcp_bpf_filter / sizeof (struct bpf_insn);
++
++struct bpf_insn dhcp_bpf_pureip_filter [] = {
++	/* Make sure it's a UDP packet... */
++	BPF_STMT (BPF_LD + BPF_B + BPF_ABS, 9),
++	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, IPPROTO_UDP, 0, 6),
++
++	/* Make sure this isn't a fragment... */
++	BPF_STMT(BPF_LD + BPF_H + BPF_ABS, 6),
++	BPF_JUMP(BPF_JMP + BPF_JSET + BPF_K, 0x1fff, 4, 0),
++
++	/* Get the IP header length... */
++	BPF_STMT (BPF_LDX + BPF_B + BPF_MSH, 0),
++
++	/* Make sure it's to the right port... */
++	BPF_STMT (BPF_LD + BPF_H + BPF_IND, 2),
++	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 37, 0, 1),             /* patch */
++
++	/* If we passed all the tests, ask for the whole packet. */
++	BPF_STMT(BPF_RET+BPF_K, (u_int)-1),
++
++	/* Otherwise, drop it. */
++	BPF_STMT(BPF_RET+BPF_K, 0),
++};
++
++int dhcp_bpf_pureip_filter_len =
++	sizeof dhcp_bpf_pureip_filter / sizeof (struct bpf_insn);
++
+ #if defined(RELAY_PORT)
+ /*
+  * For relay port extension
+@@ -235,13 +263,43 @@ struct bpf_insn dhcp_bpf_relay_filter [] = {
+ 
+ int dhcp_bpf_relay_filter_len =
+ 	sizeof dhcp_bpf_relay_filter / sizeof (struct bpf_insn);
++
++struct bpf_insn dhcp_bpf_pureip_relay_filter [] = {
++	/* Make sure it's a UDP packet... */
++	BPF_STMT (BPF_LD + BPF_B + BPF_ABS, 9),
++	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, IPPROTO_UDP, 0, 8),
++
++	/* Make sure this isn't a fragment... */
++	BPF_STMT(BPF_LD + BPF_H + BPF_ABS, 6),
++	BPF_JUMP(BPF_JMP + BPF_JSET + BPF_K, 0x1fff, 6, 0),
++
++	/* Get the IP header length... */
++	BPF_STMT (BPF_LDX + BPF_B + BPF_MSH, 0),
++
++	/* Make sure it's to the right port... */
++	BPF_STMT (BPF_LD + BPF_H + BPF_IND, 16),
++	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 37, 2, 0),             /* patch */
++
++	/* relay can have an alternative port... */
++	BPF_STMT (BPF_LD + BPF_H + BPF_IND, 16),
++	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 37, 0, 1),             /* patch */
++
++	/* If we passed all the tests, ask for the whole packet. */
++	BPF_STMT (BPF_RET + BPF_K, (u_int)-1),
++
++	/* Otherwise, drop it. */
++	BPF_STMT (BPF_RET + BPF_K, 0),
++};
++
++int dhcp_bpf_pureip_relay_filter_len =
++	sizeof dhcp_bpf_pureip_relay_filter / sizeof (struct bpf_insn);
++
+ #endif
+ 
+ #if defined (DEC_FDDI)
+ struct bpf_insn *bpf_fddi_filter = NULL;
+ #endif
+ 
+-int dhcp_bpf_filter_len = sizeof dhcp_bpf_filter / sizeof (struct bpf_insn);
+ #if defined (HAVE_TR_SUPPORT)
+ struct bpf_insn dhcp_bpf_tr_filter [] = {
+         /* accept all token ring packets due to variable length header */
+diff --git a/common/lpf.c b/common/lpf.c
+index bb8822a..d8f34a4 100644
+--- a/common/lpf.c
++++ b/common/lpf.c
+@@ -177,9 +177,15 @@ void if_deregister_send (info)
+ extern struct sock_filter dhcp_bpf_filter [];
+ extern int dhcp_bpf_filter_len;
+ 
++extern struct sock_filter dhcp_bpf_pureip_filter [];
++extern int dhcp_bpf_pureip_filter_len;
++
+ #if defined(RELAY_PORT)
+ extern struct sock_filter dhcp_bpf_relay_filter [];
+ extern int dhcp_bpf_relay_filter_len;
++
++extern struct sock_filter dhcp_bpf_pureip_relay_filter [];
++extern int dhcp_bpf_pureip_relay_filter_len;
+ #endif
+ 
+ #if defined (HAVE_TR_SUPPORT)
+@@ -249,31 +255,52 @@ void if_deregister_receive (info)
+ static void lpf_gen_filter_setup (info)
+ 	struct interface_info *info;
+ {
++	int pure_ip = info -> hw_address.hbuf [0] == HTYPE_PUREIP;
+ 	struct sock_fprog p;
+ 
+ 	memset(&p, 0, sizeof(p));
+ 
+-	/* Set up the bpf filter program structure.    This is defined in
+-	   bpf.c */
+-	p.len = dhcp_bpf_filter_len;
+-	p.filter = dhcp_bpf_filter;
++	/* Set up the bpf filter program structure and patch port(s).
++	 *
++	 * This is defined in bpf.c, XXX changes to filter program may
++	 * require changes to the insn number(s) used below! XXX
++	 */
++
++	if (pure_ip) {
++		p.len = dhcp_bpf_pureip_filter_len;
++		p.filter = dhcp_bpf_pureip_filter;
++
++		/* patch port */
++		dhcp_bpf_pureip_filter [6].k = ntohs (local_port);
++	} else {
++		p.len = dhcp_bpf_filter_len;
++		p.filter = dhcp_bpf_filter;
++
++		/* patch port */
++		dhcp_bpf_filter [8].k = ntohs (local_port);
++	}
+ 
+-        /* Patch the server port into the LPF  program...
+-	   XXX changes to filter program may require changes
+-	   to the insn number(s) used below! XXX */
+ #if defined(RELAY_PORT)
+-	if (relay_port) {
+-		/*
+-		 * If user defined relay UDP port, we need to filter
+-		 * also on the user UDP port.
+-		 */
++	/*
++	 * If user defined relay UDP port, we need to filter
++	 * also on the user UDP port.
++	 */
++	if (relay_port && pure_ip) {
++		p.len = dhcp_bpf_pureip_relay_filter_len;
++		p.filter = dhcp_bpf_pureip_relay_filter;
++
++		/* patch ports */
++		dhcp_bpf_pureip_relay_filter [6].k = ntohs (local_port);
++		dhcp_bpf_pureip_relay_filter [8].k = ntohs (relay_port);
++	} else if (relay_port) {
+ 		p.len = dhcp_bpf_relay_filter_len;
+ 		p.filter = dhcp_bpf_relay_filter;
+ 
++		/* patch ports */
++		dhcp_bpf_relay_filter [8].k = ntohs (local_port);
+ 		dhcp_bpf_relay_filter [10].k = ntohs (relay_port);
+ 	}
+ #endif
+-	dhcp_bpf_filter [8].k = ntohs (local_port);
+ 
+ 	if (setsockopt (info -> rfdesc, SOL_SOCKET, SO_ATTACH_FILTER, &p,
+ 			sizeof p) < 0) {
+@@ -578,6 +605,12 @@ get_hw_addr(const char *name, struct hardware *hw) {
+ 			hw->hbuf[3] = 0xbe;
+ 			hw->hbuf[4] = 0xef;
+ 			break;
++#endif
++#ifdef ARPHRD_RAWIP
++		case ARPHRD_RAWIP:
++			hw->hlen = 1;
++			hw->hbuf[0] = HTYPE_PUREIP;
++			break;
+ #endif
+ 		default:
+ 			log_fatal("Unsupported device type %ld for \"%s\"",
+diff --git a/common/packet.c b/common/packet.c
+index 49795c4..6745db7 100644
+--- a/common/packet.c
++++ b/common/packet.c
+@@ -119,6 +119,10 @@ void assemble_hw_header (interface, buf, bufix, to)
+ 	case HTYPE_INFINIBAND:
+ 		log_error("Attempt to assemble hw header for infiniband");
+ 		break;
++	case HTYPE_PUREIP:
++		/* Nothing to do, there is no hw header */
++		*bufix = 0;
++		break;
+ 	case HTYPE_ETHER:
+ 	default:
+ 		assemble_ethernet_header(interface, buf, bufix, to);
+@@ -219,6 +223,9 @@ ssize_t decode_hw_header (interface, buf, bufix, from)
+ 	case HTYPE_INFINIBAND:
+ 		log_error("Attempt to decode hw header for infiniband");
+ 		return (0);
++	case HTYPE_PUREIP:
++		/* Nothing to do, there is no hw header */
++		return 0;
+ 	case HTYPE_ETHER:
+ 	default:
+ 		return (decode_ethernet_header(interface, buf, bufix, from));
+diff --git a/includes/dhcp.h b/includes/dhcp.h
+index d519821..75be1fb 100644
+--- a/includes/dhcp.h
++++ b/includes/dhcp.h
+@@ -76,6 +76,7 @@ struct dhcp_packet {
+ #define HTYPE_IEEE802	6               /* IEEE 802.2 Token Ring...	*/
+ #define HTYPE_FDDI	8		/* FDDI...			*/
+ #define HTYPE_INFINIBAND  32		/* IP over Infiniband		*/
++#define HTYPE_PUREIP	35		/* Pure IP			*/
+ #define HTYPE_IPMP       255            /* IPMP - random hw address - there
+ 					 * is no standard for this so we
+ 					 * just steal a type            */
+-- 
+2.39.2
+
diff --git a/packages/isc-dhcp/patches/0002-Checkpoint-improved-patch.patch b/packages/isc-dhcp/patches/0002-Checkpoint-improved-patch.patch
new file mode 100644
index 00000000..60b693f6
--- /dev/null
+++ b/packages/isc-dhcp/patches/0002-Checkpoint-improved-patch.patch
@@ -0,0 +1,170 @@
+From e67d1b6b4178f412084459c4cb7e54a8c0019bd2 Mon Sep 17 00:00:00 2001
+From: Francis Dupont <fdupont@isc.org>
+Date: Fri, 6 Nov 2020 10:46:09 +0100
+Subject: [PATCH 2/4] Checkpoint: improved patch
+
+---
+ common/bpf.c | 10 +++---
+ common/lpf.c | 89 +++++++++++++++++++++++++++++++++++-----------------
+ 2 files changed, 65 insertions(+), 34 deletions(-)
+
+diff --git a/common/bpf.c b/common/bpf.c
+index 0c08574..30dcaa5 100644
+--- a/common/bpf.c
++++ b/common/bpf.c
+@@ -214,13 +214,13 @@ struct bpf_insn dhcp_bpf_pureip_filter [] = {
+ 
+ 	/* Make sure it's to the right port... */
+ 	BPF_STMT (BPF_LD + BPF_H + BPF_IND, 2),
+-	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 37, 0, 1),             /* patch */
++	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 67, 0, 1),             /* patch */
+ 
+ 	/* If we passed all the tests, ask for the whole packet. */
+-	BPF_STMT(BPF_RET+BPF_K, (u_int)-1),
++	BPF_STMT(BPF_RET + BPF_K, (u_int)-1),
+ 
+ 	/* Otherwise, drop it. */
+-	BPF_STMT(BPF_RET+BPF_K, 0),
++	BPF_STMT(BPF_RET + BPF_K, 0),
+ };
+ 
+ int dhcp_bpf_pureip_filter_len =
+@@ -278,11 +278,11 @@ struct bpf_insn dhcp_bpf_pureip_relay_filter [] = {
+ 
+ 	/* Make sure it's to the right port... */
+ 	BPF_STMT (BPF_LD + BPF_H + BPF_IND, 16),
+-	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 37, 2, 0),             /* patch */
++	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 67, 2, 0),             /* patch */
+ 
+ 	/* relay can have an alternative port... */
+ 	BPF_STMT (BPF_LD + BPF_H + BPF_IND, 16),
+-	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 37, 0, 1),             /* patch */
++	BPF_JUMP (BPF_JMP + BPF_JEQ + BPF_K, 67, 0, 1),             /* patch */
+ 
+ 	/* If we passed all the tests, ask for the whole packet. */
+ 	BPF_STMT (BPF_RET + BPF_K, (u_int)-1),
+diff --git a/common/lpf.c b/common/lpf.c
+index d8f34a4..75609f5 100644
+--- a/common/lpf.c
++++ b/common/lpf.c
+@@ -221,6 +221,9 @@ void if_register_receive (info)
+ 		lpf_tr_filter_setup (info);
+ 	else
+ #endif
++	if (info -> hw_address.hbuf [0] == HTYPE_PUREIP)
++		lpf_pureip_filter_setup (info);
++	else
+ 		lpf_gen_filter_setup (info);
+ 
+ 	if (!quiet_interface_discovery)
+@@ -255,50 +258,78 @@ void if_deregister_receive (info)
+ static void lpf_gen_filter_setup (info)
+ 	struct interface_info *info;
+ {
+-	int pure_ip = info -> hw_address.hbuf [0] == HTYPE_PUREIP;
+ 	struct sock_fprog p;
+ 
+ 	memset(&p, 0, sizeof(p));
+ 
+-	/* Set up the bpf filter program structure and patch port(s).
+-	 *
+-	 * This is defined in bpf.c, XXX changes to filter program may
+-	 * require changes to the insn number(s) used below! XXX
+-	 */
++	/* Set up the bpf filter program structure.    This is defined in
++	   bpf.c */
++	p.len = dhcp_bpf_filter_len;
++	p.filter = dhcp_bpf_filter;
++
++	dhcp_bpf_filter [8].k = ntohs (local_port);
+ 
+-	if (pure_ip) {
+-		p.len = dhcp_bpf_pureip_filter_len;
+-		p.filter = dhcp_bpf_pureip_filter;
++        /* Patch the server port into the LPF  program...
++	   XXX changes to filter program may require changes
++	   to the insn number(s) used below! XXX */
++#if defined(RELAY_PORT)
++	if (relay_port) {
++		/*
++		 * If user defined relay UDP port, we need to filter
++		 * also on the user UDP port.
++		 */
++		p.len = dhcp_bpf_relay_filter_len;
++		p.filter = dhcp_bpf_relay_filter;
+ 
+-		/* patch port */
+-		dhcp_bpf_pureip_filter [6].k = ntohs (local_port);
+-	} else {
+-		p.len = dhcp_bpf_filter_len;
+-		p.filter = dhcp_bpf_filter;
++		dhcp_bpf_relay_filter [8].k = ntohs (local_port);
++		dhcp_bpf_relay_filter [10].k = ntohs (relay_port);
++	}
++#endif
+ 
+-		/* patch port */
+-		dhcp_bpf_filter [8].k = ntohs (local_port);
++	if (setsockopt (info -> rfdesc, SOL_SOCKET, SO_ATTACH_FILTER, &p,
++			sizeof p) < 0) {
++		if (errno == ENOPROTOOPT || errno == EPROTONOSUPPORT ||
++		    errno == ESOCKTNOSUPPORT || errno == EPFNOSUPPORT ||
++		    errno == EAFNOSUPPORT) {
++			log_error ("socket: %m - make sure");
++			log_error ("CONFIG_PACKET (Packet socket) %s",
++				   "and CONFIG_FILTER");
++			log_error ("(Socket Filtering) are enabled %s",
++				   "in your kernel");
++			log_fatal ("configuration!");
++		}
++		log_fatal ("Can't install packet filter program: %m");
+ 	}
++}
++
++static void lpf_pureip_gen_filter_setup (info)
++	struct interface_info *info;
++{
++	struct sock_fprog p;
++
++	memset(&p, 0, sizeof(p));
++
++	/* Set up the bpf filter program structure.    This is defined in
++	   bpf.c */
++	p.len = dhcp_bpf_pureip_filter_len;
++	p.filter = dhcp_bpf_pureip_filter;
++
++	dhcp_bpf_pureip_filter [6].k = ntohs (local_port);
+ 
++        /* Patch the server port into the LPF  program...
++	   XXX changes to filter program may require changes
++	   to the insn number(s) used below! XXX */
+ #if defined(RELAY_PORT)
+-	/*
+-	 * If user defined relay UDP port, we need to filter
+-	 * also on the user UDP port.
+-	 */
+-	if (relay_port && pure_ip) {
++	if (relay_port) {
++		/*
++		 * If user defined relay UDP port, we need to filter
++		 * also on the user UDP port.
++		 */
+ 		p.len = dhcp_bpf_pureip_relay_filter_len;
+ 		p.filter = dhcp_bpf_pureip_relay_filter;
+ 
+-		/* patch ports */
+ 		dhcp_bpf_pureip_relay_filter [6].k = ntohs (local_port);
+ 		dhcp_bpf_pureip_relay_filter [8].k = ntohs (relay_port);
+-	} else if (relay_port) {
+-		p.len = dhcp_bpf_relay_filter_len;
+-		p.filter = dhcp_bpf_relay_filter;
+-
+-		/* patch ports */
+-		dhcp_bpf_relay_filter [8].k = ntohs (local_port);
+-		dhcp_bpf_relay_filter [10].k = ntohs (relay_port);
+ 	}
+ #endif
+ 
+-- 
+2.39.2
+
diff --git a/packages/isc-dhcp/patches/0003-fix-compilation-errors.patch b/packages/isc-dhcp/patches/0003-fix-compilation-errors.patch
new file mode 100644
index 00000000..c66e0c7c
--- /dev/null
+++ b/packages/isc-dhcp/patches/0003-fix-compilation-errors.patch
@@ -0,0 +1,48 @@
+From 58e0d3317795987b2f1ca788645196d0e3543f88 Mon Sep 17 00:00:00 2001
+From: Adam Smith <zero1three@gmail.com>
+Date: Tue, 23 Jan 2024 21:47:00 -0500
+Subject: [PATCH 3/4] fix compilation errors
+
+---
+ common/lpf.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/common/lpf.c b/common/lpf.c
+index 75609f5..1561d71 100644
+--- a/common/lpf.c
++++ b/common/lpf.c
+@@ -195,6 +195,7 @@ static void lpf_tr_filter_setup (struct interface_info *);
+ #endif
+ 
+ static void lpf_gen_filter_setup (struct interface_info *);
++static void lpf_pureip_gen_filter_setup (struct interface_info *);
+ 
+ void if_register_receive (info)
+ 	struct interface_info *info;
+@@ -215,14 +216,13 @@ void if_register_receive (info)
+ 	}
+ #endif
+ 
+-
+ #if defined (HAVE_TR_SUPPORT)
+ 	if (info -> hw_address.hbuf [0] == HTYPE_IEEE802)
+ 		lpf_tr_filter_setup (info);
+ 	else
+ #endif
+ 	if (info -> hw_address.hbuf [0] == HTYPE_PUREIP)
+-		lpf_pureip_filter_setup (info);
++		lpf_pureip_gen_filter_setup (info);
+ 	else
+ 		lpf_gen_filter_setup (info);
+ 
+@@ -349,6 +349,7 @@ static void lpf_pureip_gen_filter_setup (info)
+ 	}
+ }
+ 
++
+ #if defined (HAVE_TR_SUPPORT)
+ static void lpf_tr_filter_setup (info)
+ 	struct interface_info *info;
+-- 
+2.39.2
+
diff --git a/packages/isc-dhcp/patches/0004-add-support-for-ARPHRD_NONE-interface-type.patch b/packages/isc-dhcp/patches/0004-add-support-for-ARPHRD_NONE-interface-type.patch
new file mode 100644
index 00000000..32089b4d
--- /dev/null
+++ b/packages/isc-dhcp/patches/0004-add-support-for-ARPHRD_NONE-interface-type.patch
@@ -0,0 +1,29 @@
+From fd96a11b31cd05aae450ec65fde0b5c6e0b718c2 Mon Sep 17 00:00:00 2001
+From: Adam Smith <zero1three@gmail.com>
+Date: Tue, 23 Jan 2024 22:35:54 -0500
+Subject: [PATCH 4/4] add support for ARPHRD_NONE interface type
+
+---
+ common/lpf.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/common/lpf.c b/common/lpf.c
+index 1561d71..f7e84b1 100644
+--- a/common/lpf.c
++++ b/common/lpf.c
+@@ -643,6 +643,12 @@ get_hw_addr(const char *name, struct hardware *hw) {
+ 			hw->hlen = 1;
+ 			hw->hbuf[0] = HTYPE_PUREIP;
+ 			break;
++#endif
++#ifdef ARPHRD_NONE
++		case ARPHRD_NONE:
++			hw->hlen = 1;
++			hw->hbuf[0] = HTYPE_PUREIP;
++			break;
+ #endif
+ 		default:
+ 			log_fatal("Unsupported device type %ld for \"%s\"",
+-- 
+2.39.2
+