diff options
Diffstat (limited to 'modules.d/40network/net-lib.sh')
| -rwxr-xr-x | modules.d/40network/net-lib.sh | 906 |
1 files changed, 906 insertions, 0 deletions
diff --git a/modules.d/40network/net-lib.sh b/modules.d/40network/net-lib.sh new file mode 100755 index 0000000..9d88e0d --- /dev/null +++ b/modules.d/40network/net-lib.sh @@ -0,0 +1,906 @@ +#!/bin/sh + +# shellcheck disable=SC2034 +IFNETFILE="/tmp/bootnetif" + +is_ip() { + echo "$1" | { + IFS=. read -r a b c d + test "$a" -ge 0 -a "$a" -le 255 \ + -a "$b" -ge 0 -a "$b" -le 255 \ + -a "$c" -ge 0 -a "$c" -le 255 \ + -a "$d" -ge 0 -a "$d" -le 255 \ + 2> /dev/null + } && return 0 + return 1 +} + +get_ip() { + local iface="$1" ip="" + ip=$(ip -f inet addr show "$iface") + ip=${ip%%/*} + ip=${ip##* } + echo "$ip" +} + +iface_for_remote_addr() { + # shellcheck disable=SC2046 + set -- $(ip route get to "$@" | sed 's/.*\bdev\b//p;q') + echo "$1" +} + +iface_for_ip() { + # shellcheck disable=SC2046 + set -- $(ip addr show to "$@") + echo "${2%:}" +} + +iface_for_mac() { + local interface="" + local mac + mac="$(echo "$@" | sed 'y/ABCDEF/abcdef/')" + for interface in /sys/class/net/*; do + if [ "$(cat "$interface"/address)" = "$mac" ]; then + echo "${interface##*/}" + fi + done +} + +# get the iface name for the given identifier - either a MAC, IP, or iface name +iface_name() { + case "$1" in + ??:??:??:??:??:?? | ??-??-??-??-??-??) iface_for_mac "$1" ;; + *:*:* | *.*.*.*) iface_for_ip "$1" ;; + *) echo "$1" ;; + esac +} + +# list the configured interfaces +configured_ifaces() { + local IFACES="" iface_id="" rv=1 + [ -e "/tmp/net.ifaces" ] && read -r IFACES < /tmp/net.ifaces + if { pidof udevd || pidof systemd-udevd; } > /dev/null; then + for iface_id in $IFACES; do + printf "%s\n" "$(iface_name "$iface_id")" + rv=0 + done + else + warn "configured_ifaces called before udev is running" + echo "$IFACES" + [ -n "$IFACES" ] && rv=0 + fi + return $rv +} + +all_ifaces_up() { + local iface="" IFACES="" + [ -e "/tmp/net.ifaces" ] && read -r IFACES < /tmp/net.ifaces + for iface in $IFACES; do + [ -e /tmp/net."$iface".up ] || return 1 + done +} + +all_ifaces_setup() { + local iface="" IFACES="" + [ -e "/tmp/net.ifaces" ] && read -r IFACES < /tmp/net.ifaces + for iface in $IFACES; do + [ -e /tmp/net."$iface".did-setup ] || return 1 + done +} + +get_netroot_ip() { + local prefix="" server="" rest="" + splitsep ":" "$1" prefix server rest + case $server in + [0-9]*\.[0-9]*\.[0-9]*\.[0-9]*) + echo "$server" + return 0 + ;; + esac + return 1 +} + +ip_is_local() { + li=$(ip route get "$@" 2> /dev/null) + if [ -n "$li" ]; then + strstr "$li" " via " || return 0 + fi + return 1 +} + +ifdown() { + local netif="$1" + # ip down/flush ensures that routing info goes away as well + ip link set "$netif" down + ip addr flush dev "$netif" + echo "#empty" > /etc/resolv.conf + rm -f -- /tmp/net."$netif".did-setup + [ -z "$DO_VLAN" ] \ + && [ -e /sys/class/net/"$netif"/address ] \ + && rm -f -- "/tmp/net.$(cat /sys/class/net/"$netif"/address).did-setup" + # TODO: send "offline" uevent? +} + +setup_net() { + local netif="$1" f="" gw_ip="" netroot_ip="" iface="" IFACES="" + local _p + [ -e /tmp/net."$netif".did-setup ] && return + [ -z "$DO_VLAN" ] \ + && [ -e /sys/class/net/"$netif"/address ] \ + && [ -e "/tmp/net.$(cat /sys/class/net/"$netif"/address).did-setup" ] && return + [ -e "/tmp/net.ifaces" ] && read -r IFACES < /tmp/net.ifaces + [ -z "$IFACES" ] && IFACES="$netif" + # run the scripts written by ifup + # shellcheck disable=SC1090 + [ -e /tmp/net."$netif".hostname ] && . /tmp/net."$netif".hostname + # shellcheck disable=SC1090 + [ -e /tmp/net."$netif".override ] && . /tmp/net."$netif".override + # shellcheck disable=SC1090 + [ -e /tmp/dhclient."$netif".dhcpopts ] && . /tmp/dhclient."$netif".dhcpopts + # set up resolv.conf + [ -e /tmp/net."$netif".resolv.conf ] \ + && awk '!array[$0]++' /tmp/net."$netif".resolv.conf > /etc/resolv.conf + # shellcheck disable=SC1090 + [ -e /tmp/net."$netif".gw ] && . /tmp/net."$netif".gw + + # add static route + for _p in $(getargs rd.route); do + route_to_var "$_p" || continue + [ -n "$route_dev" ] && [ "$route_dev" != "$netif" ] && continue + ip route add "$route_mask" ${route_gw:+via $route_gw} ${route_dev:+dev $route_dev} + if strstr "$route_mask" ":"; then + printf -- "%s\n" "$route_mask ${route_gw:+via $route_gw} ${route_dev:+dev $route_dev}" \ + > /tmp/net.route6."$netif" + else + printf -- "%s\n" "$route_mask ${route_gw:+via $route_gw} ${route_dev:+dev $route_dev}" \ + > /tmp/net.route."$netif" + fi + done + + # If a static route was necessary to reach the gateway, the + # first gateway setup call will have failed with + # RTNETLINK answers: Network is unreachable + # Replace the default route again after static routes to cover + # this scenario. + # shellcheck disable=SC1090 + [ -e /tmp/net."$netif".gw ] && . /tmp/net."$netif".gw + + # Handle STP Timeout: arping the default gateway. + # (or the root server, if a) it's local or b) there's no gateway.) + # Note: This assumes that if no router is present the + # root server is on the same subnet. + + # Get DHCP-provided router IP, or the cmdline-provided "gw=" argument + [ -n "$new_routers" ] && gw_ip=${new_routers%%,*} + [ -n "$gw" ] && gw_ip=$gw + + # Get the "netroot" IP (if there's an IP address in there) + netroot_ip=$(get_netroot_ip "$netroot") + + # try netroot if it's local (or there's no gateway) + if ip_is_local "$netroot_ip" || [ -z "$gw_ip" ]; then + dest="$netroot_ip" + else + dest="$gw_ip" + fi + + unset layer2 + if [ -f /sys/class/net/"$netif"/device/layer2 ]; then + read -r layer2 < /sys/class/net/"$netif"/device/layer2 + fi + + if [ "$layer2" != "0" ] && [ -n "$dest" ] && ! strstr "$dest" ":"; then + if command -v arping2 > /dev/null; then + arping2 -q -C 1 -c 60 -I "$netif" "$dest" || info "Resolving $dest via ARP on $netif failed" + else + arping -q -f -w 60 -I "$netif" "$dest" || info "Resolving $dest via ARP on $netif failed" + fi + fi + unset layer2 + + : > /tmp/net."$netif".did-setup + [ -z "$DO_VLAN" ] \ + && [ -e /sys/class/net/"$netif"/address ] \ + && : > "/tmp/net.$(cat /sys/class/net/"$netif"/address).did-setup" +} + +save_netinfo() { + local netif="$1" IFACES="" f="" i="" + [ -e /tmp/net.ifaces ] && read -r IFACES < /tmp/net.ifaces + # Add $netif to the front of IFACES (if it's not there already). + set -- "$netif" + for i in $IFACES; do [ "$i" != "$netif" ] && set -- "$@" "$i"; done + IFACES="$*" + for i in $IFACES; do + for f in "/tmp/dhclient.$i."*; do + [ -f "$f" ] && cp -f "$f" /tmp/net."${f#/tmp/dhclient.}" + done + done + echo "$IFACES" > /tmp/.net.ifaces.new + mv /tmp/.net.ifaces.new /tmp/net.ifaces +} + +set_ifname() { + local name="$1" mac="$2" num=-1 n="" + # if it's already set, return the existing name + for n in $(getargs ifname=); do + strstr "$n" "$mac" && echo "${n%%:*}" && return + done + [ ! -f "/tmp/set_ifname_$name" ] || read -r num < "/tmp/set_ifname_$name" + # otherwise, pick a new name and use that + while :; do + num=$((num + 1)) + [ -e /sys/class/net/"$name"$num ] && continue + for n in $(getargs ifname=); do + [ "$name$num" = "${n%%:*}" ] && continue 2 + done + break + done + echo "ifname=$name$num:$mac" >> /etc/cmdline.d/45-ifname.conf + echo "$num" > "/tmp/set_ifname_$name" + echo "$name$num" +} + +# pxelinux provides macaddr '-' separated, but we need ':' +fix_bootif() { + local macaddr="${1}" + local IFS='-' + # shellcheck disable=SC2086 + macaddr=$(printf '%s:' ${macaddr}) + macaddr=${macaddr%:} + # strip hardware type field from pxelinux + [ -n "${macaddr%??:??:??:??:??:??}" ] && macaddr=${macaddr#??:} + # return macaddr with lowercase alpha characters expected by udev + echo "$macaddr" | sed 'y/ABCDEF/abcdef/' +} + +ibft_to_cmdline() { + local iface="" + modprobe -q iscsi_ibft + ( + for iface in /sys/firmware/ibft/ethernet*; do + local mac="" dev="" + local dhcp="" ip="" gw="" mask="" hostname="" + local dns1 dns2 + + [ -e "${iface}"/mac ] || continue + read -r mac < "${iface}"/mac + [ -z "$mac" ] && continue + dev=$(set_ifname ibft "$mac") + + [ -e /tmp/net."${dev}".has_ibft_config ] && continue + + [ -e "${iface}"/flags ] && read -r flags < "${iface}"/flags + # Skip invalid interfaces + awk -- 'BEGIN { exit (!and('"$flags"',1)) }' || continue + # Skip interfaces not used for booting unless using multipath + if ! getargbool 0 rd.iscsi.mp; then + awk -- 'BEGIN { exit (!and('"$flags"',2)) }' || continue + fi + [ -e "${iface}"/dhcp ] && read -r dhcp < "${iface}"/dhcp + [ -e "${iface}"/origin ] && read -r origin < "${iface}"/origin + [ -e "${iface}"/ip-addr ] && read -r ip < "${iface}"/ip-addr + + if [ -n "$ip" ]; then + case "$ip" in + *.*.*.*) + family=ipv4 + ;; + *:*) + family=ipv6 + ;; + esac + fi + if [ -n "$dhcp" ] || [ "$origin" -eq 3 ]; then + if [ "$family" = "ipv6" ]; then + echo "ip=$dev:dhcp6" + else + echo "ip=$dev:dhcp" + fi + elif [ -e "${iface}"/ip-addr ]; then + # skip not assigned ip addresses + [ "$ip" = "0.0.0.0" ] && continue + [ -e "${iface}"/gateway ] && read -r gw < "${iface}"/gateway + [ "$gw" = "0.0.0.0" ] && unset gw + [ -e "${iface}"/subnet-mask ] && read -r mask < "${iface}"/subnet-mask + [ -e "${iface}"/prefix-len ] && read -r prefix < "${iface}"/prefix-len + [ -e "${iface}"/primary-dns ] && read -r dns1 < "${iface}"/primary-dns + [ "$dns1" = "0.0.0.0" ] && unset dns1 + [ -e "${iface}"/secondary-dns ] && read -r dns2 < "${iface}"/secondary-dns + [ "$dns2" = "0.0.0.0" ] && unset dns + [ -e "${iface}"/hostname ] && read -r hostname < "${iface}"/hostname + if [ "$family" = "ipv6" ]; then + if [ -n "$ip" ]; then + [ -n "$prefix" ] || prefix=128 + ip="[${ip}]" + mask=$prefix + fi + if [ -n "$gw" ]; then + gw="[${gw}]" + fi + fi + if [ -n "$ip" ] && [ -n "$mask" -o -n "$prefix" ]; then + echo "ip=$ip::$gw:$mask:$hostname:$dev:none${dns1:+:$dns1}${dns2:+:$dns2}" + else + warn "${iface} does not contain a valid iBFT configuration" + warn "ip-addr=$ip" + warn "gateway=$gw" + warn "subnet-mask=$mask" + warn "hostname=$hostname" + fi + else + info "${iface} does not contain a valid iBFT configuration" + # shellcheck disable=SC2012 + ls -l "${iface}" | vinfo + fi + + if [ -e "${iface}"/vlan ]; then + read -r vlan < "${iface}"/vlan + if [ "$vlan" -ne "0" ]; then + case "$vlan" in + [0-9]*) + echo "vlan=$dev.$vlan:$dev" + echo "$mac" > /tmp/net."${dev}"."${vlan}".has_ibft_config + ;; + *) + echo "vlan=$vlan:$dev" + echo "$mac" > /tmp/net."${vlan}".has_ibft_config + ;; + esac + else + echo "$mac" > /tmp/net."${dev}".has_ibft_config + fi + else + echo "$mac" > /tmp/net."${dev}".has_ibft_config + fi + + done + ) >> /etc/cmdline.d/40-ibft.conf +} + +parse_iscsi_root() { + local v + v=${1#iscsi:} + + # extract authentication info + case "$v" in + *@*:*:*:*:*) + authinfo=${v%%@*} + v=${v#*@} + # allow empty authinfo to allow having an @ in iscsi_target_name like this: + # netroot=iscsi:@192.168.1.100::3260::iqn.2009-01.com.example:testdi@sk + if [ -n "$authinfo" ]; then + OLDIFS="$IFS" + IFS=: + # shellcheck disable=SC2086 + set $authinfo + IFS="$OLDIFS" + if [ $# -gt 4 ]; then + warn "Wrong authentication info in iscsi: parameter!" + return 1 + fi + iscsi_username=$1 + iscsi_password=$2 + if [ $# -gt 2 ]; then + iscsi_in_username=$3 + iscsi_in_password=$4 + fi + fi + ;; + esac + + # extract target ip + case "$v" in + [[]*[]]:*) + iscsi_target_ip=${v#[[]} + iscsi_target_ip=${iscsi_target_ip%%[]]*} + v=${v#[[]"$iscsi_target_ip"[]]:} + ;; + *) + iscsi_target_ip=${v%%[:]*} + v=${v#"$iscsi_target_ip":} + ;; + esac + + unset iscsi_target_name + # extract target name + case "$v" in + *:iqn.*) + iscsi_target_name=iqn.${v##*:iqn.} + v=${v%:iqn.*}: + ;; + *:eui.*) + iscsi_target_name=eui.${v##*:eui.} + v=${v%:eui.*}: + ;; + *:naa.*) + iscsi_target_name=naa.${v##*:naa.} + v=${v%:naa.*}: + ;; + esac + + # parse the rest + OLDIFS="$IFS" + IFS=: + # shellcheck disable=SC2086 + set $v + IFS="$OLDIFS" + + iscsi_protocol=$1 + shift # ignored + iscsi_target_port=$1 + shift + + if [ -n "$iscsi_target_name" ]; then + if [ $# -eq 3 ]; then + iscsi_iface_name=$1 + shift + fi + if [ $# -eq 2 ]; then + iscsi_netdev_name=$1 + shift + fi + iscsi_lun=$1 + shift + if [ $# -ne 0 ]; then + warn "Invalid parameter in iscsi: parameter!" + return 1 + fi + return 0 + fi + + if [ $# -gt 3 ] && [ -n "$1$2" ]; then + if [ -z "$3" ] || [ "$3" -ge 0 ] 2> /dev/null; then + iscsi_iface_name=$1 + shift + iscsi_netdev_name=$1 + shift + fi + fi + + iscsi_lun=$1 + shift + + iscsi_target_name=$(printf "%s:" "$@") + iscsi_target_name=${iscsi_target_name%:} +} + +ip_to_var() { + local v="${1}": + local i + set -- + while [ -n "$v" ]; do + if [ "${v#\[*:*:*\]:}" != "$v" ]; then + # handle IPv6 address + i="${v%%\]:*}" + i="${i##\[}" + set -- "$@" "$i" + v=${v#\["$i"\]:} + else + set -- "$@" "${v%%:*}" + v=${v#*:} + fi + done + + unset ip srv gw mask hostname dev autoconf macaddr mtu dns1 dns2 + + if [ $# -eq 0 ]; then + autoconf="error" + return 0 + fi + + if [ $# -eq 1 ]; then + # format: ip={dhcp|on|any|dhcp6|auto6|either6|single-dhcp} + # or + # ip=<ipv4-address> means anaconda-style static config argument cluster + autoconf="$1" + + if strglob "$autoconf" "*.*.*.*"; then + # ip=<ipv4-address> means anaconda-style static config argument cluster: + # ip=<ip> gateway=<gw> netmask=<nm> hostname=<host> mtu=<mtu> + # ksdevice={link|bootif|ibft|<MAC>|<ifname>} + ip="$autoconf" + gw=$(getarg gateway=) + mask=$(getarg netmask=) + hostname=$(getarg hostname=) + dev=$(getarg ksdevice=) + autoconf="none" + mtu=$(getarg mtu=) + + # handle special values for ksdevice + case "$dev" in + bootif | BOOTIF) dev=$(fix_bootif "$(getarg BOOTIF=)") ;; + link) dev="" ;; # FIXME: do something useful with this + ibft) dev="" ;; # ignore - ibft is handled elsewhere + esac + fi + return 0 + fi + + if [ "$2" = "dhcp" -o "$2" = "on" -o "$2" = "any" -o "$2" = "dhcp6" -o "$2" = "auto6" -o "$2" = "either6" ]; then + # format: ip=<interface>:{dhcp|on|any|dhcp6|auto6}[:[<mtu>][:<macaddr>]] + [ -n "$1" ] && dev="$1" + [ -n "$2" ] && autoconf="$2" + [ -n "$3" ] && mtu=$3 + if [ -z "$5" ]; then + macaddr="$4" + else + macaddr="${4}:${5}:${6}:${7}:${8}:${9}" + fi + return 0 + fi + + # format: ip=<client-IP>:[<peer>]:<gateway-IP>:<netmask>:<client_hostname>:<interface>:{none|off|dhcp|on|any|dhcp6|auto6|ibft}:[:[<mtu>][:<macaddr>]] + + [ -n "$1" ] && ip=$1 + [ -n "$2" ] && srv=$2 + [ -n "$3" ] && gw=$3 + [ -n "$4" ] && mask=$4 + [ -n "$5" ] && hostname=$5 + [ -n "$6" ] && dev=$6 + [ -n "$7" ] && autoconf=$7 + case "$8" in + [0-9a-fA-F]*:* | [0-9]*.[0-9]*.[0-9]*.[0-9]*) + dns1="$8" + [ -n "$9" ] && dns2="$9" + ;; + [0-9]*) + mtu="$8" + if [ -n "${9}" -a -z "${10}" ]; then + macaddr="${9}" + elif [ -n "${9}" -a -n "${10}" -a -n "${11}" -a -n "${12}" -a -n "${13}" -a -n "${14}" ]; then + macaddr="${9}:${10}:${11}:${12}:${13}:${14}" + fi + ;; + *) + if [ -n "${9}" -a -z "${10}" ]; then + macaddr="${9}" + elif [ -n "${9}" -a -n "${10}" -a -n "${11}" -a -n "${12}" -a -n "${13}" -a -n "${14}" ]; then + macaddr="${9}:${10}:${11}:${12}:${13}:${14}" + fi + ;; + esac + return 0 +} + +route_to_var() { + local v="${1}": + local i + set -- + while [ -n "$v" ]; do + if [ "${v#\[*:*:*\]:}" != "$v" ]; then + # handle IPv6 address + i="${v%%\]:*}" + i="${i##\[}" + set -- "$@" "$i" + v=${v#\["$i"\]:} + else + set -- "$@" "${v%%:*}" + v=${v#*:} + fi + done + + unset route_mask route_gw route_dev + case $# in + 2) + [ -n "$1" ] && route_mask="$1" + [ -n "$2" ] && route_gw="$2" + return 0 + ;; + 3) + [ -n "$1" ] && route_mask="$1" + [ -n "$2" ] && route_gw="$2" + [ -n "$3" ] && route_dev="$3" + return 0 + ;; + *) return 1 ;; + esac +} + +parse_ifname_opts() { + local IFS=: + # shellcheck disable=SC2086 + set -- $1 + + case $# in + 7) + ifname_if=$1 + # udev requires MAC addresses to be lower case + ifname_mac=$(echo "$2:$3:$4:$5:$6:$7" | sed 'y/ABCDEF/abcdef/') + ;; + 21) + ifname_if=$1 + # udev requires MAC addresses to be lower case + ifname_mac=$(echo "$2:$3:$4:$5:$6:$7:$8:$9:${10}:${11}:${12}:${13}:${14}:${15}:${16}:${17}:${18}:${19}:${20}:${21}" | sed 'y/ABCDEF/abcdef/') + ;; + *) + die "Invalid arguments for ifname=" + ;; + esac + + case $ifname_if in + eth[0-9] | eth[0-9][0-9] | eth[0-9][0-9][0-9] | eth[0-9][0-9][0-9][0-9]) + warn "ifname=$ifname_if uses the kernel name space for interfaces" + warn "This can fail for multiple network interfaces and is discouraged!" + warn 'Please use a custom name like "netboot" or "bluesocket"' + warn "or use biosdevname and no ifname= at all." + ;; + esac + +} + +# some network driver need long time to initialize, wait before it's ready. +wait_for_if_link() { + local cnt=0 + local li + local timeout + timeout=$(getargs rd.net.timeout.iflink=) + timeout=${timeout:-60} + timeout=$((timeout * 10)) + + while [ $cnt -lt $timeout ]; do + li=$(ip link show dev "$@" 2> /dev/null) + [ -n "$li" ] && return 0 + sleep 0.1 + cnt=$((cnt + 1)) + done + return 1 +} + +wait_for_if_up() { + local cnt=0 + local li + local timeout + timeout=$(getargs rd.net.timeout.ifup=) + timeout=${timeout:-20} + timeout=$((timeout * 10)) + + while [ $cnt -lt $timeout ]; do + li=$(ip link show up dev "$@") + if [ -n "$li" ]; then + case "$li" in + *\<UP*) + return 0 + ;; + *\<*,UP\>*) + return 0 + ;; + *\<*,UP,*\>*) + return 0 + ;; + esac + fi + if strstr "$li" "LOWER_UP" \ + && strstr "$li" "state UNKNOWN" \ + && ! strstr "$li" "DORMANT"; then + return 0 + fi + sleep 0.1 + cnt=$((cnt + 1)) + done + return 1 +} + +wait_for_route_ok() { + local cnt=0 + local timeout + timeout=$(getargs rd.net.timeout.route=) + timeout=${timeout:-20} + timeout=$((timeout * 10)) + + while [ $cnt -lt $timeout ]; do + li=$(ip route show) + [ -n "$li" ] && [ -z "${li##*"$1"*}" ] && return 0 + sleep 0.1 + cnt=$((cnt + 1)) + done + return 1 +} + +wait_for_ipv6_dad_link() { + local cnt=0 + local timeout + timeout=$(getargs rd.net.timeout.ipv6dad=) + timeout=${timeout:-50} + timeout=$((timeout * 10)) + + while [ $cnt -lt $timeout ]; do + [ -n "$(ip -6 addr show dev "$@" scope link)" ] \ + && [ -z "$(ip -6 addr show dev "$@" scope link tentative)" ] \ + && return 0 + [ -n "$(ip -6 addr show dev "$@" scope link dadfailed)" ] \ + && return 1 + sleep 0.1 + cnt=$((cnt + 1)) + done + return 1 +} + +wait_for_ipv6_dad() { + local cnt=0 + local timeout + timeout=$(getargs rd.net.timeout.ipv6dad=) + timeout=${timeout:-50} + timeout=$((timeout * 10)) + + while [ $cnt -lt $timeout ]; do + [ -n "$(ip -6 addr show dev "$@")" ] \ + && [ -z "$(ip -6 addr show dev "$@" tentative)" ] \ + && return 0 + [ -n "$(ip -6 addr show dev "$@" dadfailed)" ] \ + && return 1 + sleep 0.1 + cnt=$((cnt + 1)) + done + return 1 +} + +wait_for_ipv6_auto() { + local cnt=0 + local timeout + timeout=$(getargs rd.net.timeout.ipv6auto=) + timeout=${timeout:-40} + timeout=$((timeout * 10)) + + while [ $cnt -lt $timeout ]; do + [ -z "$(ip -6 addr show dev "$@" tentative)" ] \ + && { ip -6 route list proto ra dev "$@" | grep -q ^default; } \ + && return 0 + sleep 0.1 + cnt=$((cnt + 1)) + done + return 1 +} + +linkup() { + wait_for_if_link "$@" 2> /dev/null && ip link set "$@" up 2> /dev/null && wait_for_if_up "$@" 2> /dev/null +} + +type hostname > /dev/null 2>&1 \ + || hostname() { + cat /proc/sys/kernel/hostname + } + +iface_has_carrier() { + local cnt=0 + local iface="$1" flags="" + local timeout + local iface_sys_path + [ -n "$iface" ] || return 2 + iface_sys_path="/sys/class/net/$iface" + [ -d "$iface_sys_path" ] || return 2 + timeout=$(getargs rd.net.timeout.carrier=) + timeout=${timeout:-10} + timeout=$((timeout * 10)) + + linkup "$1" + + li=$(ip link show up dev "$iface") + strstr "$li" "NO-CARRIER" && _no_carrier_flag=1 + + while [ $cnt -lt $timeout ]; do + if [ -n "$_no_carrier_flag" ]; then + li=$(ip link show up dev "$iface") + # NO-CARRIER flag was cleared + strstr "$li" "NO-CARRIER" || return 0 + elif ! [ -e "$iface_sys_path/carrier" ]; then + # sysfs not available and "NO-CARRIER" not displayed + return 0 + fi + # double check the syscfs carrier flag + [ -e "$iface_sys_path/carrier" ] && [ "$(cat "$iface_sys_path"/carrier)" = 1 ] && return 0 + sleep 0.1 + cnt=$((cnt + 1)) + done + return 1 +} + +iface_has_link() { + iface_has_carrier "$@" +} + +iface_is_enslaved() { + local _li + _li=$(ip link show dev "$@") + strstr "$_li" " master " || return 1 + return 0 +} + +find_iface_with_link() { + local iface_path="" iface="" + for iface_path in /sys/class/net/*; do + iface=${iface_path##*/} + str_starts "$iface" "lo" && continue + if iface_has_link "$iface"; then + echo "$iface" + return 0 + fi + done + return 1 +} + +is_persistent_ethernet_name() { + local _netif="$1" + local _name_assign_type="0" + + [ -f "/sys/class/net/$_netif/name_assign_type" ] \ + && read -r _name_assign_type < "/sys/class/net/$_netif/name_assign_type" 2> /dev/null + + # NET_NAME_ENUM 1 + [ "$_name_assign_type" = "1" ] && return 1 + + # NET_NAME_PREDICTABLE 2 + [ "$_name_assign_type" = "2" ] && return 0 + + case "$_netif" in + # udev persistent interface names + eno[0-9] | eno[0-9][0-9] | eno[0-9][0-9][0-9]*) ;; + + ens[0-9] | ens[0-9][0-9] | ens[0-9][0-9][0-9]*) ;; + + enp[0-9]s[0-9]* | enp[0-9][0-9]s[0-9]* | enp[0-9][0-9][0-9]*s[0-9]*) ;; + + enP*p[0-9]s[0-9]* | enP*p[0-9][0-9]s[0-9]* | enP*p[0-9][0-9][0-9]*s[0-9]*) ;; + + # biosdevname + em[0-9] | em[0-9][0-9] | em[0-9][0-9][0-9]*) ;; + + p[0-9]p[0-9]* | p[0-9][0-9]p[0-9]* | p[0-9][0-9][0-9]*p[0-9]*) ;; + + *) + return 1 + ;; + esac + return 0 +} + +is_kernel_ethernet_name() { + local _netif="$1" + local _name_assign_type="1" + + if [ -e "/sys/class/net/$_netif/name_assign_type" ]; then + read -r _name_assign_type < "/sys/class/net/$_netif/name_assign_type" + + case "$_name_assign_type" in + 2 | 3 | 4) + # NET_NAME_PREDICTABLE 2 + # NET_NAME_USER 3 + # NET_NAME_RENAMED 4 + return 1 + ;; + 1 | *) + # NET_NAME_ENUM 1 + return 0 + ;; + esac + fi + + # fallback to error prone manual name check + case "$_netif" in + eth[0-9] | eth[0-9][0-9] | eth[0-9][0-9][0-9]*) + return 0 + ;; + *) + return 1 + ;; + esac + +} + +iface_get_subchannels() { + local _netif + local _subchannels + + _netif="$1" + + _subchannels=$({ + for i in /sys/class/net/"$_netif"/device/cdev[0-9]*; do + [ -e "$i" ] || continue + channel=$(readlink -f "$i") + printf -- "%s" "${channel##*/}," + done + }) + [ -n "$_subchannels" ] || return 1 + + printf -- "%s" "${_subchannels%,}" +} |