Initial commit

meta-google/recipes-google/ncsi/files/-bmc-gbmcbrncsidhcp.netdev

@@ -0,0 +1,5 @@
+[NetDev]
+Name=gbmcbrncsidhcp
+Kind=veth
+[Peer]
+Name=gbmcncsidhcp

meta-google/recipes-google/ncsi/files/-bmc-gbmcbrncsidhcp.network

@@ -0,0 +1,4 @@
+[Match]
+Name=gbmcbrncsidhcp
+[Network]
+Bridge=gbmcbr

meta-google/recipes-google/ncsi/files/-bmc-gbmcncsidhcp.netdev

@@ -0,0 +1,5 @@
+[NetDev]
+Name=gbmcncsidhcp
+Kind=veth
+[Peer]
+Name=gbmcbrncsidhcp

meta-google/recipes-google/ncsi/files/-bmc-gbmcncsidhcp.network

@@ -0,0 +1,10 @@
+[Match]
+Name=gbmcncsidhcp
+[Network]
+DHCP=false
+IPv6AcceptRA=false
+LLMNR=false
+MulticastDNS=false
+LinkLocalAddressing=ipv6
+# TODO: Change address back to fdb5:0481:10ce::1/64
+Address=fdb5:0481:10ce::2/64

meta-google/recipes-google/ncsi/files/50-gbmc-ncsi-clear-ip.sh.in

@@ -0,0 +1,33 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[ -n "${gbmc_ncsi_clear_ip-}" ] && return
+
+source /usr/libexec/ncsid_lib.sh || exit
+
+gbmc_ncsi_clear_ip_hook() {
+  local ip="${1-}"
+
+  # We only want to clear our IPs if we are assigning a new IP
+  [ -z "$ip" ] && return
+
+  echo "Removing Persistent NCSI IPs" >&2
+  SetStatic xyz.openbmc_project.Network '@NCSI_IF@' 2>/dev/null || true
+  UpdateIP xyz.openbmc_project.Network '@NCSI_IF@' '0.0.0.0' '0' 2>/dev/null || true
+  UpdateIP xyz.openbmc_project.Network '@NCSI_IF@' '::' '0' 2>/dev/null || true
+}
+
+GBMC_BR_LIB_SET_IP_HOOKS+=(gbmc_ncsi_clear_ip_hook)
+
+gbmc_ncsi_clear_ip=1

meta-google/recipes-google/ncsi/files/50-gbmc-ncsi.rules.in

@@ -0,0 +1,45 @@
+table inet filter {
+    chain ncsi_input {
+        type filter hook input priority 0; policy drop;
+        iifname != @NCSI_IF@ accept
+        ct state established accept
+        ip6 daddr ff00::/8 goto ncsi_brd_input
+        ip6 daddr fe80::/64 goto ncsi_legacy_input
+    }
+    chain ncsi_gbmc_br_pub_input {
+        jump gbmc_br_pub_input
+        jump ncsi_legacy_input
+        reject
+    }
+    chain gbmc_br_pub_input {
+      ip6 nexthdr icmpv6 accept
+    }
+    chain ncsi_legacy_input {
+        jump ncsi_any_input
+        tcp dport 3959 accept
+        udp dport 3959 accept
+        tcp dport 3967 accept
+        udp dport 3967 accept
+    }
+    chain ncsi_brd_input {
+        jump ncsi_any_input
+    }
+    chain ncsi_any_input {
+        icmpv6 type nd-neighbor-advert accept
+        icmpv6 type nd-neighbor-solicit accept
+        icmpv6 type nd-router-advert accept
+    }
+    chain ncsi_forward {
+        type filter hook forward priority 0; policy drop;
+        iifname != @NCSI_IF@ accept
+        oifname != gbmcbr drop
+        ip6 daddr fdb5:0481:10ce::/64 drop
+        ip6 saddr fdb5:0481:10ce::/64 drop
+    }
+    chain ncsi_dhcp_input {
+        type filter hook input priority 0; policy drop;
+        iifname != ncsigbmc accept
+        ip6 nexthdr icmpv6 accept
+        udp dport 547 accept
+    }
+}

meta-google/recipes-google/ncsi/files/gbmc-ncsi-alias.service.in

@@ -0,0 +1,12 @@
+[Unit]
+BindsTo=ncsid@@NCSI_IF@.service
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/sbin/ip link set @NCSI_IF@ alias ncsi
+ExecStop=/sbin/ip link set @NCSI_IF@ alias ''
+
+[Install]
+WantedBy=nic-hostful@@NCSI_IF@.target
+WantedBy=nic-hostless@@NCSI_IF@.target

meta-google/recipes-google/ncsi/files/gbmc-ncsi-br-deprecated-ips.sh.in

@@ -0,0 +1,152 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[ -n "${gbmc_ncsi_br_deprecated_ips_lib-}" ] && return
+
+source /usr/share/network/lib.sh || exit
+
+gbmc_ncsi_br_deprecated_ips_init=
+gbmc_ncsi_br_deprecated_ips_confip=
+gbmc_ncsi_br_deprecated_ips_lastip=
+gbmc_ncsi_br_deprecated_ips_lastncsi=
+gbmc_ncsi_br_deprecated_ips_confncsi=
+
+gbmc_ncsi_br_deprecated_ips_update() {
+  [ -n "$gbmc_ncsi_br_deprecated_ips_init" ] || return
+  [ "$gbmc_ncsi_br_deprecated_ips_confip" != "$gbmc_ncsi_br_deprecated_ips_lastip" ] || \
+    [ "$gbmc_ncsi_br_deprecated_ips_confncsi" != "$gbmc_ncsi_br_deprecated_ips_lastncsi" ] || return
+  gbmc_ncsi_br_deprecated_ips_confip="$gbmc_ncsi_br_deprecated_ips_lastip"
+  gbmc_ncsi_br_deprecated_ips_confncsi="$gbmc_ncsi_br_deprecated_ips_lastncsi"
+
+  printf 'gBMC NCSI Deprecated Addrs: %s\n' \
+    "${gbmc_ncsi_br_deprecated_ips_lastip:-(deleted)}" >&2
+
+  local contents=
+  local nfcontents=
+  if [ -n "$gbmc_ncsi_br_deprecated_ips_lastip" ]; then
+    local pfx_bytes=()
+    ip_to_bytes pfx_bytes "$gbmc_ncsi_br_deprecated_ips_lastip"
+
+    local pfx="$(ip_bytes_to_str pfx_bytes)"
+    (( pfx_bytes[9] &= 0xf0 ))
+    local stateless_pfx="$(ip_bytes_to_str pfx_bytes)"
+    local stateless_ip=
+    if [ -e /sys/class/net/gbmcbr ]; then
+      local gbmcbr_mac="$(ip link show gbmcbr | tail -n 1 | awk '{print $2}')"
+      local gbmcbr_eui48="$(mac_to_eui48 "$gbmcbr_mac")"
+      stateless_ip="$(ip_pfx_concat "$stateless_pfx/80" "$gbmcbr_eui48")"
+      stateless_ip="${stateless_ip%/*}"
+    fi
+    pfx_bytes[8]=0
+    pfx_bytes[9]=0
+    local host_pfx=
+    if [ -n "${gbmc_ncsi_br_deprecated_ips_confncsi}" ]; then
+      # Only impersonate the host if we have an NCSI state machine
+      host_pfx="$(ip_bytes_to_str pfx_bytes)"
+    fi
+    read -r -d '' contents <<EOF
+[Network]
+IPv6ProxyNDP=yes
+IPv6ProxyNDPAddress=$pfx
+IPv6ProxyNDPAddress=$stateless_pfx
+${host_pfx:+IPv6ProxyNDPAddress=}$host_pfx
+${stateless_ip:+IPv6ProxyNDPAddress=}$stateless_ip
+EOF
+    read -r -d '' nfcontents <<EOF
+table inet filter {
+  chain ncsi_input {
+    ip6 saddr != $pfx/76 ip6 daddr $pfx/76 goto ncsi_gbmc_br_pub_input
+    ${host_pfx:+ip6 daddr $host_pfx/64 goto ncsi_legacy_input}
+  }
+  chain ncsi_forward {
+    ip6 saddr != $pfx/76 ip6 daddr $pfx/76 accept
+  }
+}
+EOF
+  fi
+
+  local file
+  for file in /run/systemd/network/{00,}-bmc-@NCSI_IF@.network.d/50-deprecated.conf; do
+    mkdir -p -m 755 "$(dirname "$file")"
+    if [ -z "$contents" ]; then
+      rm -f "$file"
+    else
+      printf '%s' "$contents" >"$file"
+    fi
+  done
+
+  # Ensure that systemd-networkd performs a reconfiguration as it doesn't
+  # currently check the mtime of drop-in files.
+  touch -c /etc/systemd/network/*-bmc-@NCSI_IF@.network
+
+  if [ "$(systemctl is-active systemd-networkd)" != 'inactive' ]; then
+    networkctl reload && networkctl reconfigure @NCSI_IF@
+  fi
+
+  local rfile=/run/nftables/40-gbmc-ncsi-br.rules
+  mkdir -p -m 755 "$(dirname "$rfile")"
+  if [ -z "$nfcontents" ]; then
+    rm -f "$rfile"
+  else
+    printf '%s' "$nfcontents" >"$rfile"
+  fi
+  systemctl reset-failed nftables && systemctl --no-block reload-or-restart nftables || true
+}
+
+gbmc_ncsi_br_deprecated_ips_hook() {
+  if [ "$change" = 'init' ]; then
+    gbmc_ncsi_br_deprecated_ips_init=1
+    gbmc_ip_monitor_defer
+  elif [ "$change" = 'defer' ]; then
+    gbmc_ncsi_br_deprecated_ips_update
+  elif [ "$change" = 'addr' -a "$scope" = 'global' -a "$fam" = 'inet6' ] &&
+      [ "$intf" = 'gbmcbr' -o "$intf" = '@NCSI_IF@' ] &&
+      [[ "$flags" != *deprecated* ]]; then
+    local pfx_bytes=()
+    ip_to_bytes pfx_bytes "$ip" || return
+    # No ULA Addresses
+    if (( pfx_bytes[0] & 0xfe == 0xfc )); then
+      return
+    fi
+    # We only want to allow a <pfx>::fd0x address, where x>0
+    if (( pfx_bytes[8] != 0xfd || pfx_bytes[9] & 0xf == 0 )); then
+      return
+    fi
+    for (( i = 10; i < 16; ++i )); do
+      if (( pfx_bytes[i] != 0 )); then
+        return
+      fi
+    done
+    if [ "$action" = 'add' -a "$ip" != "$gbmc_ncsi_br_deprecated_ips_lastip" ]; then
+      gbmc_ncsi_br_deprecated_ips_lastip="$ip"
+      gbmc_ip_monitor_defer
+    fi
+    if [ "$action" = 'del' -a "$ip" = "$gbmc_ncsi_br_deprecated_ips_lastip" ]; then
+      gbmc_ncsi_br_deprecated_ips_lastip=
+      gbmc_ip_monitor_defer
+    fi
+  elif [ "$change" = 'link' -a "$action" = 'add' -a "$intf" = '@NCSI_IF@' ]; then
+    if ip link show '@NCSI_IF@' | grep -q '^ *alias ncsi$'; then
+      gbmc_ncsi_br_deprecated_ips_lastncsi=1
+      gbmc_ip_monitor_defer
+    else
+      gbmc_ncsi_br_deprecated_ips_lastncsi=
+      gbmc_ip_monitor_defer
+    fi
+  fi
+}
+
+GBMC_IP_MONITOR_HOOKS+=(gbmc_ncsi_br_deprecated_ips_hook)
+
+gbmc_ncsi_br_deprecated_ips_lib=1

meta-google/recipes-google/ncsi/files/gbmc-ncsi-br-pub-addr.sh.in

@@ -0,0 +1,87 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[ -n "${gbmc_ncsi_br_pub_addr_lib-}" ] && return
+
+[ ! -e /usr/share/gbmc-br-lib.sh ] && return
+
+source /usr/share/network/lib.sh || exit
+source /usr/share/gbmc-br-lib.sh || exit
+
+gbmc_ncsi_br_pub_addr_init=
+gbmc_ncsi_br_pub_addr_lastip=
+gbmc_ncsi_br_pub_addr_confip=
+
+gbmc_ncsi_br_pub_addr_update() {
+  [ -n "$gbmc_ncsi_br_pub_addr_init" ] || return
+  [ "$gbmc_ncsi_br_pub_addr_confip" != "$gbmc_ncsi_br_pub_addr_lastip" ] || return
+  gbmc_ncsi_br_pub_addr_confip="$gbmc_ncsi_br_pub_addr_lastip"
+
+  printf 'gBMC Bridge Pub Addr from NCSI: %s\n' \
+    "${gbmc_ncsi_br_pub_addr_lastip:-(deleted)}" >&2
+
+  local pfx_bytes=()
+  if [ -n "$gbmc_ncsi_br_pub_addr_lastip" ]; then
+    ip_to_bytes pfx_bytes "$gbmc_ncsi_br_pub_addr_lastip"
+    # Ensure we have a /64 or an fdxx address
+    if (( pfx_bytes[8] != 0xfd || pfx_bytes[9] == 0 )); then
+      local i
+      for (( i = 8; i < 16; ++i )); do
+        if (( pfx_bytes[$i] != 0 )); then
+          pfx_bytes=()
+          break
+        fi
+      done
+    fi
+  fi
+
+  local contents=
+  if (( ${#pfx_bytes[@]} != 0 )); then
+    pfx_bytes[8]=0xfd
+    # We never want to use the stateless pfx
+    if (( pfx_bytes[9] == 0 )); then
+      pfx_bytes[9]=0x01
+    fi
+    # Remove any existing persisted IP
+    gbmc_br_set_ip
+    # Load the IP to the bridge non-persistently
+    gbmc_br_reload_ip "$(ip_bytes_to_str pfx_bytes)"
+  else
+    gbmc_br_reload_ip
+  fi
+}
+
+gbmc_ncsi_br_pub_addr_hook() {
+  if [ "$change" = 'init' ]; then
+    gbmc_ncsi_br_pub_addr_init=1
+    gbmc_ip_monitor_defer
+  elif [ "$change" = 'defer' ]; then
+    gbmc_ncsi_br_pub_addr_update
+  elif [ "$change" = 'addr' -a "$intf" = '@NCSI_IF@' ] &&
+     [ "$scope" = 'global' -a "$fam" = 'inet6' ] &&
+     [[ "$flags" != *deprecated* ]]; then
+    if [ "$action" = 'add' -a "$ip" != "$gbmc_ncsi_br_pub_addr_lastip" ]; then
+      gbmc_ncsi_br_pub_addr_lastip="$ip"
+      gbmc_ip_monitor_defer
+    fi
+    if [ "$action" = 'del' -a "$ip" = "$gbmc_ncsi_br_pub_addr_lastip" ]; then
+      gbmc_ncsi_br_pub_addr_lastip=
+      gbmc_ip_monitor_defer
+    fi
+  fi
+}
+
+GBMC_IP_MONITOR_HOOKS+=(gbmc_ncsi_br_pub_addr_hook)
+
+gbmc_ncsi_br_pub_addr_lib=1

meta-google/recipes-google/ncsi/files/gbmc-ncsi-dhcrelay.service.in

@@ -0,0 +1,13 @@
+[Unit]
+Description=gBMC DHCP Relay Agent Daemon
+After=network.target
+StartLimitIntervalSec=10
+StartLimitBurst=3
+
+[Service]
+Restart=always
+RestartSec=5
+ExecStart=/usr/sbin/dhcrelay -d --no-pid -rp 3967 -l gbmcncsidhcp -u ff02::1:2%%@NCSI_IF@
+
+[Install]
+WantedBy=multi-user.target

meta-google/recipes-google/ncsi/files/gbmc-ncsi-ip-from-ra.service.in

@@ -0,0 +1,15 @@
+[Unit]
+Description=gBMC NCSI RA Discovery
+After=network.target
+StartLimitIntervalSec=10
+StartLimitBurst=3
+Conflicts=nic-hostless@@NCSI_IF@.target
+Conflicts=nic-hostful@@NCSI_IF@.target
+
+[Service]
+Restart=always
+RestartSec=5
+ExecStart=/usr/libexec/gbmc-ncsi-ip-from-ra.sh
+
+[Install]
+WantedBy=multi-user.target

meta-google/recipes-google/ncsi/files/gbmc-ncsi-ip-from-ra.sh.in

@@ -0,0 +1,95 @@
+#!/bin/bash
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[ ! -e /usr/share/gbmc-br-lib.sh ] && exit
+
+# shellcheck source=meta-google/recipes-google/networking/network-sh/lib.sh
+source /usr/share/network/lib.sh || exit
+# shellcheck source=meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-lib.sh
+source /usr/share/gbmc-br-lib.sh || exit
+
+NCSI_IF='@NCSI_IF@'
+
+old_pfx=
+old_fqdn=
+old_rtr=
+
+set_host() {
+  [[ -n "$host" && -n "$domain" && -n "$hextet" ]] || return
+
+  local fqdn="$host-n$hextet.$domain"
+  [ "$fqdn" != "$old_fqdn" ] || return
+  old_fqdn="$fqdn"
+
+  echo "Found hostname $fqdn" >&2
+  hostnamectl set-hostname "$fqdn" || true
+}
+
+set_net() {
+  [[ -n "$pfx" && -n "$rtr" ]] || return
+  [[ "$pfx" != "$old_pfx" || "$rtr" != "$old_rtr" ]] || return
+  old_pfx="$pfx"
+  old_rtr="$rtr"
+
+  echo "Found prefix $pfx from $rtr" >&2
+
+  # We no longer need NCSId if we are in this configuration
+  systemctl stop --no-block ncsid@"$NCSI_IF" || true
+
+  # Save the IP address for the interface
+  gbmc_br_set_ip "$pfx" || true
+
+  # DHCP Relay workaround until alternate source port is supported
+  # TODO: Remove this once internal relaying cleanups land
+  gbmc-ncsi-smartnic-wa.sh || true
+}
+
+w=60
+while true; do
+  start=$SECONDS
+  while read -r line; do
+    if [ -z "$line" ]; then
+      hextet=
+      pfx=
+      host=
+      domain=
+    elif [[ "$line" =~ ^Prefix' '*:' '*(.*)/([0-9]+)$ ]]; then
+      t_pfx="${BASH_REMATCH[1]}"
+      t_pfx_len="${BASH_REMATCH[2]}"
+      ip_to_bytes t_pfx_b "$t_pfx" || continue
+      (( t_pfx_len == 76 && t_pfx_b[8] & 0xfd == 0xfd )) || continue
+      (( t_pfx_b[9] |= 1 ))
+      hextet="fd$(printf '%02x' "${t_pfx_b[9]}")"
+      pfx="$(ip_bytes_to_str t_pfx_b)"
+    elif [[ "$line" =~ ^'DNS search list'' '*:' '*([^.]+)(.*[.]google[.]com)$ ]]; then
+      # Ideally, we use PCRE and with lookahead and can do this in a single regex
+      #   ^([a-zA-Z0-9-]+(?=-n[a-fA-F0-9]{1,4})|[a-zA-Z0-9-]+(?!-n[a-fA-F0-9]{1,4}))[^.]*[.]((?:[a-zA-Z0-9]*[.])*google[.]com)$
+      # Instead we do multiple steps to extract the needed info
+      host="${BASH_REMATCH[1]}"
+      domain="${BASH_REMATCH[2]#.}"
+      if [[ "$host" =~ (-n[a-fA-F0-9]{1,4})$ ]]; then
+        host="${host%"${BASH_REMATCH[1]}"}"
+      fi
+    elif [[ "$line" =~ ^from' '(.*)$ ]]; then
+      rtr="${BASH_REMATCH[1]}"
+      set_net || true
+      set_host || true
+    fi
+  done < <(rdisc6 -d -m "$NCSI_IF" -w $(( w * 1000 )) 2>/dev/null)
+  # If rdisc6 exits early we still want to wait the full `w` time before
+  # starting again.
+  (( timeout = start + w - SECONDS ))
+  sleep $(( timeout < 0 ? 0 : timeout ))
+done

meta-google/recipes-google/ncsi/files/gbmc-ncsi-nft.sh.in

@@ -0,0 +1,85 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[ -n "${gbmc_ncsi_nft_lib-}" ] && return
+
+source /usr/share/network/lib.sh || exit
+
+gbmc_ncsi_nft_init=
+gbmc_ncsi_nft_lastip4=
+gbmc_ncsi_nft_lastip6=
+
+gbmc_ncsi_nft_update() {
+  [ -n "$gbmc_ncsi_nft_init" ] || return
+
+  printf 'NCSI firewall for IPv4(%s) IPv6(%s)\n' \
+    "${gbmc_ncsi_nft_lastip4:-(deleted)}" \
+    "${gbmc_ncsi_nft_lastip6:-(deleted)}" >&2
+
+  local contents=
+  contents+='table inet filter {'$'\n'
+  contents+='    chain ncsi_input {'$'\n'
+
+  local ip4="$gbmc_ncsi_nft_lastip4"
+  if [ -n "$ip4" ]; then
+    contents+="        ip daddr $ip4 goto ncsi_legacy_input"$'\n'
+  fi
+
+  local ip6="$gbmc_ncsi_nft_lastip6"
+  if [ -n "$ip6" ]; then
+    contents+="        ip6 daddr $ip6 goto ncsi_legacy_input"$'\n'
+  fi
+
+  contents+='    }'$'\n'
+  contents+='}'$'\n'
+
+  local rfile=/run/nftables/30-gbmc-ncsi-in.rules
+  mkdir -p -m 755 "$(dirname "$rfile")"
+  printf '%s' "$contents" >"$rfile"
+
+  systemctl reset-failed nftables && systemctl --no-block reload-or-restart nftables || true
+}
+
+gbmc_ncsi_nft_hook() {
+  if [ "$change" = 'init' ]; then
+    gbmc_ncsi_nft_init=1
+    gbmc_ncsi_nft_update
+  elif [ "$change" = 'addr' -a "$intf" = '@NCSI_IF@' -a "$scope" = 'global' ]; then
+    if [ "$fam" = 'inet6' ]; then
+      local -n lastip='gbmc_ncsi_nft_lastip6'
+      local pfx_bytes=()
+      ip_to_bytes pfx_bytes "$ip" || return
+      # We only want to allow a <pfx>:: address
+      for (( i = 8; i < 16; ++i )); do
+        if (( pfx_bytes[i] != 0 )); then
+          return
+        fi
+      done
+    else
+      local -n lastip='gbmc_ncsi_nft_lastip4'
+    fi
+    if [ "$action" = 'add' -a "$ip" != "$lastip" ]; then
+      lastip="$ip"
+      gbmc_ncsi_nft_update
+    fi
+    if [ "$action" = 'del' -a "$ip" = "$lastip" ]; then
+      lastip=
+      gbmc_ncsi_nft_update
+    fi
+  fi
+}
+
+GBMC_IP_MONITOR_HOOKS+=(gbmc_ncsi_nft_hook)
+
+gbmc_ncsi_nft_lib=1

meta-google/recipes-google/ncsi/files/gbmc-ncsi-set-nicenabled.service.in

@@ -0,0 +1,17 @@
+[Unit]
+Description=Set NICEnabled property to true
+Wants=xyz.openbmc_project.Network.service
+After=xyz.openbmc_project.Network.service
+Wants=mapper-wait@-xyz-openbmc_project-network-@NCSI_IF@.service
+After=mapper-wait@-xyz-openbmc_project-network-@NCSI_IF@.service
+StartLimitIntervalSec=10
+StartLimitBurst=3
+
+[Service]
+Type=oneshot
+ExecStart=busctl set-property xyz.openbmc_project.Network /xyz/openbmc_project/network/@NCSI_IF@ xyz.openbmc_project.Network.EthernetInterface NICEnabled b true
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target

meta-google/recipes-google/ncsi/files/gbmc-ncsi-smartnic-wa.sh.in

@@ -0,0 +1,52 @@
+#!/bin/bash
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+override=/run/systemd/system/gbmc-ncsi-dhcrelay.service.d/10-nosp.conf
+mkdir -p "$(dirname "$override")"
+echo '[Service]' >"$override"
+echo 'ExecStart=' >>"$override"
+# Remove the source relay port from the relay, bringing it back to run on
+# the default port 547. Our relays don't support the source port option needed
+# to run on 3967 for our legacy NICs.
+grep '^ExecStart=' /lib/systemd/system/gbmc-ncsi-dhcrelay.service | \
+  sed 's, -rp 3967,,' >>"$override"
+
+override=/run/systemd/system/gbmc-br-dhcp.service.d/10-direct.conf
+mkdir -p "$(dirname "$override")"
+echo '[Service]' >"$override"
+echo 'ExecStart=' >>"$override"
+# Switch the gbmcbr interface for the NCSI one to avoid passing the SOLICIT
+# message through the BMC relay.
+grep '^ExecStart=' /lib/systemd/system/gbmc-br-dhcp.service | \
+  sed 's, -i gbmcbr, -i @NCSI_IF@,' >>"$override"
+
+systemctl daemon-reload
+systemctl reset-failed gbmc-ncsi-dhcrelay
+systemctl restart --no-block gbmc-ncsi-dhcrelay
+systemctl reset-failed gbmc-br-dhcp
+systemctl restart --no-block gbmc-br-dhcp
+
+read -r -d '' contents <<EOF
+table inet filter {
+  chain ncsi_legacy_input {
+      udp dport {546,547} accept
+  }
+}
+EOF
+rfile=/run/nftables/60-gbmc-ncsi-ra.rules
+mkdir -p "$(dirname "$rfile")"
+printf '%s' "$contents" >"$rfile"
+systemctl reset-failed nftables
+systemctl --no-block reload-or-restart nftables

meta-google/recipes-google/ncsi/files/gbmc-ncsi-sslh.service

@@ -0,0 +1,21 @@
+[Unit]
+Description=SSL/SSH multiplexer
+Requires=gbmc-ncsi-sslh.socket
+After=gbmc-ncsi-sslh.socket
+
+[Service]
+ExecStart=/usr/sbin/sslh -n -f --ssh [::1]:22 --http [::1]:80 --tls [::1]:443
+KillMode=process
+#Hardening
+PrivateTmp=true
+ProtectSystem=strict
+ProtectHome=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectControlGroups=true
+MountFlags=private
+NoNewPrivileges=true
+PrivateDevices=true
+RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
+MemoryDenyWriteExecute=true
+DynamicUser=true

meta-google/recipes-google/ncsi/files/gbmc-ncsi-sslh.socket.in

@@ -0,0 +1,6 @@
+[Socket]
+BindToDevice=@NCSI_IF@
+ListenStream=3967
+
+[Install]
+WantedBy=sockets.target

meta-google/recipes-google/ncsi/gbmc-ncsi-config.bb

@@ -0,0 +1,149 @@
+SUMMARY = "Configures ncsi for a gBMC system"
+PR = "r1"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/Apache-2.0;md5=89aea4e17d99a7cacdbeed46a0096b10"
+
+inherit systemd
+
+SRC_URI += " \
+  file://-bmc-gbmcbrncsidhcp.netdev \
+  file://-bmc-gbmcbrncsidhcp.network \
+  file://-bmc-gbmcncsidhcp.netdev \
+  file://-bmc-gbmcncsidhcp.network \
+  file://50-gbmc-ncsi.rules.in \
+  file://gbmc-ncsi-dhcrelay.service.in \
+  file://gbmc-ncsi-ip-from-ra.service.in \
+  file://gbmc-ncsi-ip-from-ra.sh.in \
+  file://gbmc-ncsi-smartnic-wa.sh.in \
+  file://gbmc-ncsi-sslh.socket.in \
+  file://gbmc-ncsi-sslh.service \
+  file://gbmc-ncsi-nft.sh.in \
+  file://gbmc-ncsi-br-pub-addr.sh.in \
+  file://gbmc-ncsi-br-deprecated-ips.sh.in \
+  file://gbmc-ncsi-set-nicenabled.service.in \
+  file://gbmc-ncsi-alias.service.in \
+  file://50-gbmc-ncsi-clear-ip.sh.in \
+  "
+
+S = "${WORKDIR}"
+
+RDEPENDS:${PN} += " \
+  bash \
+  dhcp-relay \
+  gbmc-ip-monitor \
+  ncsid \
+  network-sh \
+  nftables-systemd \
+  sslh \
+  ndisc6-rdisc6 \
+  "
+
+FILES:${PN} += " \
+  ${datadir}/gbmc-br-lib \
+  ${datadir}/gbmc-ip-monitor \
+  ${systemd_unitdir} \
+  "
+
+SYSTEMD_SERVICE:${PN} += " \
+  gbmc-ncsi-dhcrelay.service \
+  gbmc-ncsi-sslh.service \
+  gbmc-ncsi-sslh.socket \
+  gbmc-ncsi-set-nicenabled.service \
+  gbmc-ncsi-ip-from-ra.service \
+  "
+
+do_install:append() {
+  if_name='${GBMC_NCSI_IF_NAME}'
+  if [ -z "$if_name" ]; then
+    echo "Missing if_name" >&2
+    exit 1
+  fi
+
+  install -d -m0755 ${D}${sysconfdir}/sysctl.d
+  echo "net.ipv6.conf.$if_name.accept_dad=0" \
+    >>${D}${sysconfdir}/sysctl.d/25-gbmc-ncsi.conf
+  echo "net.ipv6.conf.$if_name.dad_transmits=0" \
+    >>${D}${sysconfdir}/sysctl.d/25-gbmc-ncsi.conf
+
+  install -d -m0755 ${D}${systemd_unitdir}/network
+  install -m0644 ${WORKDIR}/-bmc-gbmcbrncsidhcp.netdev \
+    ${D}${systemd_unitdir}/network/
+  install -m0644 ${WORKDIR}/-bmc-gbmcbrncsidhcp.network \
+    ${D}${systemd_unitdir}/network/
+  install -m0644 ${WORKDIR}/-bmc-gbmcncsidhcp.netdev \
+    ${D}${systemd_unitdir}/network/
+  install -m0644 ${WORKDIR}/-bmc-gbmcncsidhcp.network \
+    ${D}${systemd_unitdir}/network/
+
+  netdir=${D}${systemd_unitdir}/network/00-bmc-$if_name.network.d
+  install -d -m0755 "$netdir"
+  echo '[Network]' >>"$netdir"/gbmc-ncsi.conf
+  echo 'DHCP=false' >>"$netdir"/gbmc-ncsi.conf
+  echo 'IPv6AcceptRA=false' >>"$netdir"/gbmc-ncsi.conf
+  echo 'LLMNR=false' >>"$netdir"/gbmc-ncsi.conf
+  echo 'MulticastDNS=false' >>"$netdir"/gbmc-ncsi.conf
+  echo 'LinkLocalAddressing=ipv6' >>"$netdir"/gbmc-ncsi.conf
+
+  nftdir=${D}${sysconfdir}/nftables
+  install -d -m0755 "$nftdir"
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/50-gbmc-ncsi.rules.in \
+    >"$nftdir"/50-gbmc-ncsi.rules
+
+  wantdir=${D}${systemd_system_unitdir}/multi-user.target.wants
+  install -d -m0755 "$wantdir"
+  ln -sv ../ncsid@.service "$wantdir"/ncsid@$if_name.service
+
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-alias.service.in \
+    >${D}${systemd_system_unitdir}/gbmc-ncsi-alias.service
+  install -d -m0755 "${D}${systemd_system_unitdir}/nic-hostless@$if_name.target.wants"
+  ln -sv ../gbmc-ncsi-alias.service "${D}${systemd_system_unitdir}/nic-hostless@$if_name.target.wants"/
+  install -d -m0755 "${D}${systemd_system_unitdir}/nic-hostful@$if_name.target.wants"
+  ln -sv ../gbmc-ncsi-alias.service "${D}${systemd_system_unitdir}/nic-hostful@$if_name.target.wants"/
+
+  install -m 0644 ${WORKDIR}/gbmc-ncsi-sslh.service ${D}${systemd_system_unitdir}
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-sslh.socket.in \
+    >${D}${systemd_system_unitdir}/gbmc-ncsi-sslh.socket
+
+  mondir=${D}${datadir}/gbmc-ip-monitor/
+  install -d -m0755 $mondir
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-nft.sh.in \
+    >${WORKDIR}/gbmc-ncsi-nft.sh
+  install -m644 ${WORKDIR}/gbmc-ncsi-nft.sh $mondir
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-br-pub-addr.sh.in \
+    >${WORKDIR}/gbmc-ncsi-br-pub-addr.sh
+  install -m644 ${WORKDIR}/gbmc-ncsi-br-pub-addr.sh $mondir
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-br-deprecated-ips.sh.in \
+    >${WORKDIR}/gbmc-ncsi-br-deprecated-ips.sh
+  install -m644 ${WORKDIR}/gbmc-ncsi-br-deprecated-ips.sh $mondir
+
+  brlibdir=${D}${datadir}/gbmc-br-lib/
+  install -d -m0755 $brlibdir
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/50-gbmc-ncsi-clear-ip.sh.in \
+    >${WORKDIR}/50-gbmc-ncsi-clear-ip.sh
+  install -m644 ${WORKDIR}/50-gbmc-ncsi-clear-ip.sh $brlibdir
+
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-set-nicenabled.service.in \
+    >${D}${systemd_system_unitdir}/gbmc-ncsi-set-nicenabled.service
+
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-dhcrelay.service.in \
+    >${D}${systemd_system_unitdir}/gbmc-ncsi-dhcrelay.service
+
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-ip-from-ra.service.in \
+    >${WORKDIR}/gbmc-ncsi-ip-from-ra.service
+  install -m0644 ${WORKDIR}/gbmc-ncsi-ip-from-ra.service ${D}${systemd_system_unitdir}
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-ip-from-ra.sh.in \
+    >${WORKDIR}/gbmc-ncsi-ip-from-ra.sh
+  install -d -m0755 ${D}${libexecdir}
+  install -m0755 ${WORKDIR}/gbmc-ncsi-ip-from-ra.sh ${D}${libexecdir}/
+
+  sed "s,@NCSI_IF@,$if_name,g" ${WORKDIR}/gbmc-ncsi-smartnic-wa.sh.in \
+    >${WORKDIR}/gbmc-ncsi-smartnic-wa.sh
+  install -d -m0755 ${D}${bindir}
+  install -m0755 ${WORKDIR}/gbmc-ncsi-smartnic-wa.sh ${D}${bindir}/
+}
+
+do_rm_work:prepend() {
+  # HACK: Work around broken do_rm_work not properly calling rm with `--`
+  # It doesn't like filenames that start with `-`
+  rm -rf -- ${WORKDIR}/-*
+}

meta-google/recipes-google/ncsi/ncsid_git.bb

@@ -0,0 +1,40 @@
+SUMMARY = "Google NCSI daemon"
+DESCRIPTION = "Google NCSI daemon."
+GOOGLE_MISC_PROJ = "ncsid"
+
+require ../google-misc/google-misc.inc
+
+inherit systemd
+
+EXTRA_OEMESON = " \
+        -Dtests=disabled \
+        "
+
+SYSTEMD_SERVICE:${PN} += " \
+  dhcp4@.service \
+  dhcp6@.service \
+  ncsid@.service \
+  nic-hostful@.target \
+  nic-hostless@.target \
+  update-ra-gw@.service \
+  update-ra-neighbor@.service \
+  update-ra-neighbor@.timer \
+  update-static-neighbors@.service \
+  update-static-neighbors@.timer \
+  "
+
+DEPENDS += " \
+  fmt \
+  sdbusplus \
+  stdplus \
+  "
+
+RDEPENDS:${PN} += " \
+  bash \
+  busybox \
+  iputils-arping \
+  jq \
+  ndisc6-ndisc6 \
+  ndisc6-rdisc6 \
+  systemd \
+  "