install: Make wget ignore IPv6 addresses if IPv6 is disabled.

GitHub Action runners do not support IPv6, so this causes
builds to fail occasionally if wget attempts to use IPv6
addresses to download the DAHDI firmware tarballs. This
tries to detect a lack of IPv6 support and explicitly disable
it for downloads to avoid that.

Author: InterLinked1

.github/workflows/main.yml

@@ -26,7 +26,7 @@ jobs:
         run: |
           cd /usr/src
           sudo apt-get update -y
-          sudo apt-get install -y wget
+          sudo apt-get install -y wget procps
           sudo wget https://raw.githubusercontent.com/InterLinked1/phreakscript/master/phreaknet.sh
           sudo chmod +x phreaknet.sh
           sudo ./phreaknet.sh make
@@ -40,7 +40,7 @@ jobs:
         run: |
           cd /usr/src/
           apt-get update -y
-          apt-get install -y wget
+          apt-get install -y wget procps
           wget https://raw.githubusercontent.com/InterLinked1/phreakscript/master/phreaknet.sh
           chmod +x phreaknet.sh
           ./phreaknet.sh make
@@ -54,7 +54,7 @@ jobs:
         run: |
           cd /usr/src
           apt-get update -y
-          apt-get install -y wget
+          apt-get install -y wget procps
           wget https://raw.githubusercontent.com/InterLinked1/phreakscript/master/phreaknet.sh
           chmod +x phreaknet.sh
           ./phreaknet.sh make
@@ -68,7 +68,7 @@ jobs:
         run: |
           cd /usr/src
           apt-get update -y
-          apt-get install -y wget
+          apt-get install -y wget procps
           wget https://raw.githubusercontent.com/InterLinked1/phreakscript/master/phreaknet.sh
           chmod +x phreaknet.sh
           ./phreaknet.sh make

phreaknet.sh

@@ -1349,6 +1349,17 @@ install_dahdi() {
 		sleep 2
 	fi
 
+	# Requests to downloads.digium.com usually use IPv4, but sometimes use IPv6
+	# This is problematic on GitHub Action Runners, which have IPv6 disabled,
+	# and won't let you enable it
+	IPV6_DISABLED=0
+	if which sysctl > /dev/null; then
+		# See https://github.com/asterisk/asterisk-ci-actions/blob/main/SetupUbuntuRunner/action.yml
+		printf "IPv6 Disabled: "
+		sysctl net.ipv6.conf.all.disable_ipv6
+		IPV6_DISABLED=$( sysctl net.ipv6.conf.all.disable_ipv6 | cut -d '=' -f2 | xargs | tr -d '\n' )
+	fi
+
 	# Check that the kernel sources are really present
 	# /usr/src/linux-headers-* on Debian
 	# /usr/src/kernels on Rocky Linux
@@ -1458,6 +1469,14 @@ install_dahdi() {
 		mv $AST_SOURCE_PARENT_DIR/$DAHDI_LIN_SRC_DIR/drivers/dahdi/xpp/Kbuild $AST_SOURCE_PARENT_DIR/$DAHDI_LIN_SRC_DIR/drivers/dahdi/xpp/Bad-Kbuild
 	fi
 
+	# If IPv6 is disabled, force wget downloads to use the IPv4 address
+	# Could also use --prefer-family, but is IPv6 is disabled, we have to use IPv4 anyways
+	if [ "$IPV6_DISABLED" = "1" ]; then
+		echoerr "IPv6 is disabled, forcing driver downloads to use only IPv4..."
+		sed -i 's/WGET_ARGS:=--continue/WGET_ARGS:=--inet4-only --continue/g' drivers/dahdi/firmware/Makefile
+		grep "WGET" drivers/dahdi/firmware/Makefile
+	fi
+
 	make -j$(nproc) $DAHDI_CFLAGS
 	if [ $? -ne 0 ]; then
 		echoerr "DAHDI Linux compilation failed, aborting install"
@@ -2490,7 +2509,7 @@ if which curl > /dev/null; then # only execute if we have curl
 	# Only download the first few lines of the file, to get the latest version number, and only check every so often
 	recent=$( find /tmp/phreaknet_upstream_version.txt -mmin -720 2>/dev/null | wc -l )
 	if [ "$recent" != "1" ]; then
-		printf " *** Checking if a more recent version is available..."
+		printf " *** Checking if a higher numbered version is available..."
 		curl --silent https://raw.githubusercontent.com/InterLinked1/phreakscript/master/phreaknet.sh -r 0-210 > /tmp/phreaknet_upstream_version.txt
 		# Compare current version with latest upstream version
 		upstream=`grep -m1 "# v" /tmp/phreaknet_upstream_version.txt | cut -d'v' -f2`