Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 1 | #!/bin/bash |
| 2 | # Copyright 2021 Google LLC |
| 3 | # |
| 4 | # Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | # you may not use this file except in compliance with the License. |
| 6 | # You may obtain a copy of the License at |
| 7 | # |
| 8 | # http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | # |
| 10 | # Unless required by applicable law or agreed to in writing, software |
| 11 | # distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | # See the License for the specific language governing permissions and |
| 14 | # limitations under the License. |
| 15 | |
| 16 | |
| 17 | # List of options the script accepts. Trailing column means that the option |
| 18 | # requires an argument. |
| 19 | ARGUMENT_LIST=( |
| 20 | "help" |
| 21 | "product-id:" |
| 22 | "product-name:" |
| 23 | "host-mac:" |
| 24 | "bind-device:" |
| 25 | "dev-mac:" |
William A. Kennington III | f8a7774 | 2022-02-28 18:05:54 -0800 | [diff] [blame] | 26 | "dev-type:" |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 27 | "gadget-dir-name:" |
| 28 | "iface-name:" |
| 29 | ) |
| 30 | |
| 31 | print_usage() { |
| 32 | cat <<HELP |
| 33 | $0 [OPTIONS] [stop|start] |
| 34 | Create USB Gadget Configuration |
| 35 | --product-id USB Product Id for the gadget. |
| 36 | --product-name Product name string (en) for the gadget. |
| 37 | --host-mac MAC address of the host part of the connection. Optional. |
| 38 | --dev-mac MAC address of the device (gadget) part of the connection. Optional. |
William A. Kennington III | f8a7774 | 2022-02-28 18:05:54 -0800 | [diff] [blame] | 39 | --dev-type Type of gadget to instantiate. Default: "eem" |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 40 | --bind-device Name of the device to bind, as listed in /sys/class/udc/ |
William A. Kennington III | 878454a | 2022-04-04 17:05:05 -0700 | [diff] [blame] | 41 | --gadget-dir-name Optional base name for gadget directory. Default: iface-name |
William A. Kennington III | 69ebd2c | 2022-04-04 17:51:09 -0700 | [diff] [blame^] | 42 | --iface-name name of the network interface. |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 43 | --help Print this help and exit. |
| 44 | HELP |
| 45 | } |
| 46 | |
| 47 | gadget_start() { |
William A. Kennington III | a9de0df | 2022-02-22 17:11:13 -0800 | [diff] [blame] | 48 | # Add the gbmcbr configuration if this is a relevant device |
| 49 | if (( ID_VENDOR == 0x18d1 && ID_PRODUCT == 0x22b )); then |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 50 | mkdir -p /run/systemd/network || return |
William A. Kennington III | a9de0df | 2022-02-22 17:11:13 -0800 | [diff] [blame] | 51 | cat >/run/systemd/network/+-bmc-"${IFACE_NAME}".network <<EOF |
| 52 | [Match] |
| 53 | Name=${IFACE_NAME} |
| 54 | [Network] |
| 55 | Bridge=gbmcbr |
| 56 | [Bridge] |
| 57 | Cost=85 |
| 58 | EOF |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 59 | # Ignore any failures due to systemd being unavailable at boot |
William A. Kennington III | a9de0df | 2022-02-22 17:11:13 -0800 | [diff] [blame] | 60 | networkctl reload || true |
| 61 | fi |
| 62 | |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 63 | local gadget_dir="${CONFIGFS_HOME}/usb_gadget/${GADGET_DIR_NAME}" |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 64 | mkdir -p "${gadget_dir}" || return |
| 65 | echo ${ID_VENDOR} > "${gadget_dir}/idVendor" || return |
| 66 | echo ${ID_PRODUCT} > "${gadget_dir}/idProduct" || return |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 67 | |
| 68 | local str_en_dir="${gadget_dir}/strings/0x409" |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 69 | mkdir -p "${str_en_dir}" || return |
| 70 | echo ${STR_EN_VENDOR} > "${str_en_dir}/manufacturer" || return |
| 71 | echo ${STR_EN_PRODUCT} > "${str_en_dir}/product" || return |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 72 | |
| 73 | local config_dir="${gadget_dir}/configs/c.1" |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 74 | mkdir -p "${config_dir}" || return |
| 75 | echo 100 > "${config_dir}/MaxPower" || return |
| 76 | mkdir -p "${config_dir}/strings/0x409" || return |
| 77 | echo "${DEV_TYPE^^}" > "${config_dir}/strings/0x409/configuration" || return |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 78 | |
William A. Kennington III | f8a7774 | 2022-02-28 18:05:54 -0800 | [diff] [blame] | 79 | local func_dir="${gadget_dir}/functions/${DEV_TYPE}.${IFACE_NAME}" |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 80 | mkdir -p "${func_dir}" || return |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 81 | |
| 82 | if [[ -n $HOST_MAC_ADDR ]]; then |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 83 | echo ${HOST_MAC_ADDR} >${func_dir}/host_addr || return |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 84 | fi |
| 85 | |
| 86 | if [[ -n $DEV_MAC_ADDR ]]; then |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 87 | echo ${DEV_MAC_ADDR} >${func_dir}/dev_addr || return |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 88 | fi |
| 89 | |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 90 | ln -s "${func_dir}" "${config_dir}" || return |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 91 | |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 92 | echo "${BIND_DEVICE}" >${gadget_dir}/UDC || return |
William A. Kennington III | 8d0f906 | 2022-04-04 17:30:54 -0700 | [diff] [blame] | 93 | local ifname |
| 94 | ifname="$(<"${func_dir}"/ifname)" || return |
| 95 | if [ "${IFACE_NAME}" != "$ifname" ]; then |
| 96 | # We don't care if downing the interface fails, only the rename |
| 97 | ip link set dev "$ifname" down || true |
| 98 | ip link set dev "$ifname" name "${IFACE_NAME}" || return |
| 99 | fi |
William A. Kennington III | f08c0cc | 2022-04-04 19:39:58 -0700 | [diff] [blame] | 100 | ip link set dev "$IFACE_NAME" up || return |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 101 | } |
| 102 | |
| 103 | gadget_stop() { |
| 104 | local gadget_dir="${CONFIGFS_HOME}/usb_gadget/${GADGET_DIR_NAME}" |
William A. Kennington III | f8a7774 | 2022-02-28 18:05:54 -0800 | [diff] [blame] | 105 | rm -f ${gadget_dir}/configs/c.1/${DEV_TYPE}.${IFACE_NAME} |
William A. Kennington III | 0ae2b8f | 2022-03-31 18:02:30 -0700 | [diff] [blame] | 106 | rmdir ${gadget_dir}/functions/${DEV_TYPE}.${IFACE_NAME} \ |
| 107 | ${gadget_dir}/configs/c.1/strings/0x409 \ |
| 108 | ${gadget_dir}/configs/c.1 \ |
| 109 | ${gadget_dir}/strings/0x409 \ |
| 110 | ${gadget_dir} || true |
William A. Kennington III | a9de0df | 2022-02-22 17:11:13 -0800 | [diff] [blame] | 111 | |
| 112 | rm -f /run/systemd/network/+-bmc-"${IFACE_NAME}".network |
William A. Kennington III | e1c8b87 | 2022-04-04 17:30:48 -0700 | [diff] [blame] | 113 | networkctl reload || true |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | opts=$(getopt \ |
| 117 | --longoptions "$(printf "%s," "${ARGUMENT_LIST[@]}")" \ |
| 118 | --name "$(basename "$0")" \ |
| 119 | --options "" \ |
| 120 | -- "$@" |
| 121 | ) |
| 122 | |
| 123 | eval set --$opts |
| 124 | |
| 125 | CONFIGFS_HOME=${CONFIGFS_HOME:-/sys/kernel/config} |
| 126 | ID_VENDOR="0x18d1" # Google |
| 127 | ID_PRODUCT="" |
| 128 | STR_EN_VENDOR="Google" |
| 129 | STR_EN_PRODUCT="" |
| 130 | DEV_MAC_ADDR="" |
William A. Kennington III | f8a7774 | 2022-02-28 18:05:54 -0800 | [diff] [blame] | 131 | DEV_TYPE="eem" |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 132 | HOST_MAC_ADDR="" |
| 133 | BIND_DEVICE="" |
| 134 | ACTION="start" |
William A. Kennington III | 878454a | 2022-04-04 17:05:05 -0700 | [diff] [blame] | 135 | GADGET_DIR_NAME="" |
William A. Kennington III | 69ebd2c | 2022-04-04 17:51:09 -0700 | [diff] [blame^] | 136 | IFACE_NAME="" |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 137 | while [[ $# -gt 0 ]]; do |
| 138 | case "$1" in |
| 139 | --product-id) |
| 140 | ID_PRODUCT=$2 |
| 141 | shift 2 |
| 142 | ;; |
| 143 | --product-name) |
| 144 | STR_EN_PRODUCT=$2 |
| 145 | shift 2 |
| 146 | ;; |
| 147 | --host-mac) |
| 148 | HOST_MAC_ADDR=$2 |
| 149 | shift 2 |
| 150 | ;; |
| 151 | --dev-mac) |
| 152 | DEV_MAC_ADDR=$2 |
| 153 | shift 2 |
| 154 | ;; |
William A. Kennington III | f8a7774 | 2022-02-28 18:05:54 -0800 | [diff] [blame] | 155 | --dev-type) |
| 156 | DEV_TYPE=$2 |
| 157 | shift 2 |
| 158 | ;; |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 159 | --bind-device) |
| 160 | BIND_DEVICE=$2 |
| 161 | shift 2 |
| 162 | ;; |
| 163 | --gadget-dir-name) |
| 164 | GADGET_DIR_NAME=$2 |
| 165 | shift 2 |
| 166 | ;; |
| 167 | --iface-name) |
| 168 | IFACE_NAME=$2 |
| 169 | shift 2 |
| 170 | ;; |
| 171 | --help) |
| 172 | print_usage |
| 173 | exit 0 |
| 174 | ;; |
| 175 | start) |
| 176 | ACTION="start" |
| 177 | shift 1 |
| 178 | break |
| 179 | ;; |
| 180 | stop) |
| 181 | ACTION="stop" |
| 182 | shift 1 |
| 183 | break |
| 184 | ;; |
| 185 | --) |
| 186 | shift 1 |
| 187 | ;; |
| 188 | *) |
| 189 | break |
| 190 | ;; |
| 191 | esac |
| 192 | done |
| 193 | |
William A. Kennington III | 878454a | 2022-04-04 17:05:05 -0700 | [diff] [blame] | 194 | if [ -z "$GADGET_DIR_NAME" ]; then |
| 195 | GADGET_DIR_NAME="$IFACE_NAME" |
| 196 | fi |
| 197 | |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 198 | if [[ $ACTION == "stop" ]]; then |
| 199 | gadget_stop |
| 200 | else |
William A. Kennington III | 69ebd2c | 2022-04-04 17:51:09 -0700 | [diff] [blame^] | 201 | if [ -z "$ID_PRODUCT" ]; then |
| 202 | echo "Product ID is missing" >&2 |
| 203 | exit 1 |
| 204 | fi |
| 205 | |
| 206 | if [ -z "$IFACE_NAME" ]; then |
| 207 | echo "Interface name is missing" >&2 |
| 208 | exit 1 |
| 209 | fi |
| 210 | |
| 211 | if [ -z "$BIND_DEVICE" ]; then |
| 212 | echo "Bind device is missing" >&2 |
| 213 | exit 1 |
| 214 | fi |
| 215 | |
William A. Kennington III | 986d3a6 | 2022-03-31 17:58:30 -0700 | [diff] [blame] | 216 | rc=0 |
| 217 | gadget_start || rc=$? |
| 218 | (( rc == 0 )) || gadget_stop || true |
| 219 | exit $rc |
Maksym Sloyko | 9634273 | 2021-08-03 21:54:28 +0000 | [diff] [blame] | 220 | fi |