install: Add option to disable VPMADT032 echo canceller driver.

Due to Sangoma's persistent negligence and incompetence, the VPMADT032
drivers cannot be built on newer kernels, due to the objtool change
made in kernel commit torvalds/linux@0b10177.
Since the VPMADT032 involves a binary, the source for which is not
present in the tree, only Sangoma can fix this issue. Since this is
unlikely to happen anytime soon, given their incompetence and gross
mismanagement to date, add an option to disable this particular driver
so the rest of DAHDI Linux can successfully compile and install.

Author: InterLinked1

.github/workflows/main.yml

@@ -166,6 +166,35 @@ jobs:
            cd $GITHUB_WORKSPACE
            ./phreaknet.sh make
            GIT_REPO_PATH=${GITHUB_WORKSPACE} KSRC=/usr/src/linux-next phreaknet dahdi --drivers
+  dahdi-next-no-vpmadt032:
+    runs-on: ubuntu-24.04
+    name: DAHDI, next kernel (VPMADT032 disabled)
+    container: debian:13
+    steps:
+     - name: Install packages
+       run: |
+          apt-get -y update
+          apt-get -y upgrade
+          apt-get -y install git gcc make perl-modules flex bison wget libssl-dev libelf-dev bc curl
+     - name: Clone kernel
+       run: |
+          cd /usr/src
+          git clone --depth 1 git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
+     - name: Checkout
+       uses: actions/checkout@v4
+     - name: Build kernel
+       run: |
+          cd /usr/src/linux-next
+          make -j$(nproc) kernelversion
+          make -j$(nproc) x86_64_defconfig
+          make -j$(nproc) modules_prepare
+          make -j$(nproc)
+          make -j$(nproc) modules
+     - name: Build DAHDI
+       run: |
+           cd $GITHUB_WORKSPACE
+           ./phreaknet.sh make
+           GIT_REPO_PATH=${GITHUB_WORKSPACE} KSRC=/usr/src/linux-next phreaknet dahdi --drivers --disable-vpmadt032
   dahdi-next-fortified:
     runs-on: ubuntu-24.04
     name: DAHDI, fortified
@@ -293,6 +322,16 @@ jobs:
         run: |
           ./phreaknet.sh make
           GIT_REPO_PATH=${GITHUB_WORKSPACE} INSTALL_LIBPRI=0 INSTALL_LIBSS7=0 phreaknet install --fast --dahdi --autokvers --drivers --devmode --lightweight --vanilla
+  alpine-linux:
+    runs-on: ubuntu-24.04
+    name: Alpine Linux
+    container: alpine:latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build DAHDI and Asterisk
+        run: |
+          ./phreaknet.sh make
+          GIT_REPO_PATH=${GITHUB_WORKSPACE} phreaknet install --fast --dahdi --autokvers --drivers --devmode --disable-vpmadt032
   alpine-linux-322:
     runs-on: ubuntu-24.04
     # Newer versions need the fatal objtool patch reverted, which requires building the kernel... not worth it on Alpine

patches/vpmadt032_disable.diff

@@ -0,0 +1,31 @@
+diff --git a/drivers/dahdi/Kbuild b/drivers/dahdi/Kbuild
+index d9d26da..5029aa7 100644
+--- a/drivers/dahdi/Kbuild
++++ b/drivers/dahdi/Kbuild
+@@ -132,16 +132,16 @@ endif
+ # VPMADT032 Loader
+ ###############################################################################
+ 
+-dahdi_vpmadt032_loader-objs := vpmadt032_loader/dahdi_vpmadt032_loader.o 
+-
+-ifneq ($(DAHDI_ARCH),)
+-  ifneq ($(wildcard $(src)/vpmadt032_loader/vpmadt032_$(DAHDI_ARCH).o_shipped),)
+-    $(shell touch $(KBUILD_EXTMOD)/vpmadt032_loader/.vpmadt032_$(DAHDI_ARCH).o.cmd)
+-    VPMADT032_LOADER_PRESENT=yes
+-    dahdi_vpmadt032_loader-objs += vpmadt032_loader/vpmadt032_$(DAHDI_ARCH).o
+-    obj-$(DAHDI_BUILD_ALL)$(CONFIG_DAHDI_VPMADT032_LOADER)	+= dahdi_vpmadt032_loader.o
+-  endif
+-endif
++#dahdi_vpmadt032_loader-objs := vpmadt032_loader/dahdi_vpmadt032_loader.o
++
++#ifneq ($(DAHDI_ARCH),)
++#  ifneq ($(wildcard $(src)/vpmadt032_loader/vpmadt032_$(DAHDI_ARCH).o_shipped),)
++#    $(shell touch $(KBUILD_EXTMOD)/vpmadt032_loader/.vpmadt032_$(DAHDI_ARCH).o.cmd)
++#    VPMADT032_LOADER_PRESENT=yes
++#    dahdi_vpmadt032_loader-objs += vpmadt032_loader/vpmadt032_$(DAHDI_ARCH).o
++#    obj-$(DAHDI_BUILD_ALL)$(CONFIG_DAHDI_VPMADT032_LOADER)	+= dahdi_vpmadt032_loader.o
++#  endif
++#endif
+ 
+ ###############################################################################
+ # HPEC Support 

phreaknet.1

@@ -291,6 +291,9 @@ Install DAHDI along with Asterisk.
 \f[B]--drivers\f[R]
 Also install DAHDI drivers removed in 2018 by Sangoma
 .TP
+\f[B]--disable-vpmadt032\f[R]
+Disable VPMADT032 echo canceller driver from building (temporarily required on newer kernels)
+.TP
 \f[B]-f\f[R], \f[B]--force\f[R]
 Force install a new version of DAHDI/Asterisk, even if one already
 exists, overwriting old source directories if necessary.

phreaknet.1.md

@@ -300,6 +300,9 @@ The following options may be used with the **install** command.
 **--drivers**
 : Also install DAHDI drivers removed in 2018 by Sangoma
 
+**--disable-vpmadt032**
+: Disable VPMADT032 echo canceller driver from building (temporarily required on newer kernels)
+
 **--generic**
 : Use generic kernel headers that do not match the installed kernel version
 

phreaknet.sh

@@ -250,6 +250,7 @@ CHAN_SCCP=0
 RPT_MODULES=0
 CHAN_DAHDI=0
 DAHDI_OLD_DRIVERS=0
+DAHDI_DISABLE_VPMADT032=0
 EMPULSE=1 # Automatically enable EMPULSE, cause why not?
 DAHDI_WANPIPE=0 # wanpipe only needed for Sangoma cards
 DEVMODE=0
@@ -636,6 +637,7 @@ Options:
        --rpt          install: Add radio repeater modules
        --sccp         install: Install chan_sccp channel driver (Cisco Skinny)
        --drivers      install: Also install DAHDI drivers removed in 2018
+	   --disable-vpmadt032  install: Disable VPMADT032 echo canceller driver from building (temporarily required on newer kernels)
        --generic      install: Use generic kernel headers that do not match the installed kernel version
        --autokvers    install: Automatically pass the appropriate value for KVERS for DAHDI compilation (only needed on non-Debian systems)
        --extcodecs    install: Specify this if any external codecs are being or will be installed
@@ -2108,12 +2110,22 @@ get_dahlin_source() {
 
 	# Not yet merged
 	dahlin_apply_pr 77 # EXTRA_CFLAGS removal
-	dahlin_apply_pr 79 # vpmadt032 binary blob
 	dahlin_apply_pr 92 # del_timer_sync wrapper
 	dahlin_apply_pr 96 # from_timer renamed to timer_container_of
 	dahlin_apply_pr 98 # hrtimer_init changed to hrtimer_setup
 	dahlin_apply_pr 99 # use module_init/module_exit instead of init_module/cleanup_module
 
+	# See https://github.com/asterisk/dahdi-linux/issues/97
+	# Sangoma needs to recreate the binary, until they do that, this driver is unusable on newer kernels
+	# and the target must be disabled to build the rest of DAHDI Linux.
+	# Sangoma is AWOL, so it might be a while...
+	if [ "$DAHDI_DISABLE_VPMADT032" = "1" ]; then
+		git_patch "vpmadt032_disable.diff"
+	else
+		# Not yet merged
+		dahlin_apply_pr 79 # vpmadt032 binary blob
+	fi
+
 	# New Features
 	if [ "$EXTRA_FEATURES" = "1" ]; then
 		# Real time dial pulsing (DAHDI to Asterisk)
@@ -2273,7 +2285,30 @@ install_dahdi() {
 	# if KSRC/KVERS env vars are set, they will automatically propagate to children
 	$AST_MAKE $DAHDI_CFLAGS
 	if [ $? -ne 0 ]; then
-		die "DAHDI Linux compilation failed, aborting install"
+		echoerr "DAHDI Linux compilation failed, aborting install"
+		if [ "$DAHDI_DISABLE_VPMADT032" != "1" ]; then
+			echoerr "*** Suggestion ***"
+			echoerr "If using a newer kernel, consider retrying install with --disable-vpmadt032 if VPMADT032 echo canceller is not required."
+			echoerr ""
+			echoerr "*** More Details ***"
+			echoerr "As you may know, Sangoma has not been maintaining DAHDI for years, even to perform adequate maintenance,"
+			echoerr "and DAHDI is currently community maintained, e.g. via PhreakScript."
+			echoerr "However, the VPMADT032 EC requires a binary firmware blob, an updated version of which is required,"
+			echoerr "and which can only come from Sangoma. As a result, until Sangoma gets their act together,"
+			echoerr "if you use an affected kernel version, the only way to successfully build DAHDI Linux"
+			echoerr "is to either:"
+			echoerr "1) Disable this driver, and that is what --disable-vpmadt032 does."
+			echoerr "2) Build the kernel from source, applying this patch: https://github.com/InterLinked1/phreakscript/blob/master/patches/objtool_check_nonfatal.diff"
+			echoerr "   (There are some examples of this in the CI, if you choose this route: https://github.com/InterLinked1/phreakscript/blob/master/.github/workflows/main.yml)"
+			echoerr ""
+			echoerr "See this issue for more details: https://github.com/asterisk/dahdi-linux/issues/97"
+			echoerr ""
+			echoerr "The only way to get this fixed is to get Sangoma to do something about it."
+			echoerr "We suggest you call Sangoma to file a complaint at (877) 344-4861 x2,3,5"
+			echoerr "or by opening a case online at https://help.sangoma.com/s/"
+			echoerr "Otherwise, they will continue doing nothing, just like they have been."
+		fi
+		exit 1
 	fi
 	$AST_MAKE install $DAHDI_CFLAGS
 
@@ -3315,7 +3350,7 @@ else
 fi
 
 FLAG_TEST=0
-PARSED_ARGUMENTS=$(getopt -n phreaknet -o bc:u:dfhostu:v:w -l backtraces,cc:,dahdi,force,flag-test,help,sip,testsuite,user:,version:,weaktls,alsa,cisco,rpt,sccp,clli:,debug:,devmode,disa:,drivers,experimental,extcodecs,g72x,fast,freepbx,generic,autokvers,lightweight,api-key:,rotate,audit,boilerplate,upstream:,manselect,minimal,vanilla,wanpipe,offline,noupdate -- "$@")
+PARSED_ARGUMENTS=$(getopt -n phreaknet -o bc:u:dfhostu:v:w -l backtraces,cc:,dahdi,force,flag-test,help,sip,testsuite,user:,version:,weaktls,alsa,cisco,rpt,sccp,clli:,debug:,devmode,disa:,drivers,disable-vpmadt032,experimental,extcodecs,g72x,fast,freepbx,generic,autokvers,lightweight,api-key:,rotate,audit,boilerplate,upstream:,manselect,minimal,vanilla,wanpipe,offline,noupdate -- "$@")
 VALID_ARGUMENTS=$?
 if [ "$VALID_ARGUMENTS" != "0" ]; then
 	usage
@@ -3356,6 +3391,7 @@ while true; do
 		--debug ) DEBUG_LEVEL=$2; shift 2;;
 		--devmode ) DEVMODE=1; shift ;;
 		--drivers ) DAHDI_OLD_DRIVERS=1; shift ;;
+		--disable-vpmadt032 ) DAHDI_DISABLE_VPMADT032=1; shift ;;
 		--experimental ) EXPERIMENTAL_FEATURES=1; shift ;;
 		--extcodecs ) EXTERNAL_CODECS=1; shift ;;
 		--fast ) FAST_COMPILE=1; shift ;;