├── .gitignore ├── TODO.md ├── examples ├── env ├── stop.sh └── run.sh ├── .gitlab-ci.yml ├── Dockerfile ├── .github └── workflows │ └── main.yml ├── entrypoint.sh ├── README.md └── LICENSE.md /.gitignore: -------------------------------------------------------------------------------- 1 | /env 2 | /run.sh 3 | /stop.sh 4 | -------------------------------------------------------------------------------- /TODO.md: -------------------------------------------------------------------------------- 1 | - Add option for [CSD](https://www.infradead.org/openconnect/csd.html) 2 | - Add ARM builds for Docker container 3 | - Investigate [ocproxy](https://github.com/cernekee/ocproxy) / [vpn-slice](https://github.com/dlenski/vpn-slice) 4 | -------------------------------------------------------------------------------- /examples/env: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | CONTAINER_NAME='vpn' 3 | URL='anyconnect.mydomain.com' 4 | USER='jdoe' 5 | AUTH_GROUP='mygroup' 6 | PASS='reallysecurepassword123' 7 | # Set the below if you need to specify OTP 8 | # you can use a tool like pass-otp for this 9 | # e.g. : 10 | # OTP="$(pass otp my/secret/key)" 11 | SEARCH_DOMAINS='corporate-domain.com domain2.corporate-domain.com' 12 | # Subnets you want to route via the VPN (CIDR format) 13 | # Set to 0.0.0.0/0 to route all traffic 14 | # If adding multiple routes, add a space between them 15 | ROUTES='10.0.0.0/8 172.12.0.0/12' 16 | # Set extra openconnect arguments if needed 17 | # EXTRA_ARGS='' 18 | -------------------------------------------------------------------------------- /examples/stop.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | set -e 4 | 5 | SCRIPT=$(readlink -f "$0") 6 | SCRIPT_PATH=$(dirname "$SCRIPT") 7 | # shellcheck disable=SC1091 8 | . "${SCRIPT_PATH}/env" 9 | 10 | # Remove our routes first 11 | CONTAINER_GW=$(sudo docker inspect "${CONTAINER_NAME}" | jq -r '.[0].NetworkSettings.Networks.bridge.IPAddress') 12 | # shellcheck disable=SC2153 13 | for ROUTE in ${ROUTES} 14 | do 15 | sudo ip route del "${ROUTE}" via "${CONTAINER_GW}" 16 | done 17 | 18 | # Now, let's tear down the container 19 | sudo docker rm -f "${CONTAINER_NAME}" 20 | 21 | # Restore DNS config 22 | sudo mv -f /etc/resolv.conf.orig /etc/resolv.conf > /dev/null 2>&1 || true 23 | -------------------------------------------------------------------------------- /.gitlab-ci.yml: -------------------------------------------------------------------------------- 1 | --- 2 | 3 | stages: 4 | - Shellcheck 5 | - Build 6 | 7 | shellcheck: 8 | stage: Shellcheck 9 | image: 10 | name: docker.io/koalaman/shellcheck-alpine:stable 11 | entrypoint: [""] 12 | script: 13 | - for SCRIPT in entrypoint.sh examples/*.sh; do shellcheck $SCRIPT; done 14 | 15 | build: 16 | stage: Build 17 | image: 18 | name: docker.io/docker:stable 19 | services: 20 | - docker:dind 21 | script: 22 | - docker login -u "${CI_REGISTRY_USER}" -p "${CI_REGISTRY_PASSWORD}" "${CI_REGISTRY}" 23 | - docker build -t "${CI_REGISTRY_IMAGE}:${CI_COMMIT_SHA}" -t "${CI_REGISTRY_IMAGE}:latest" --build-arg BUILD_DATE="${CI_COMMIT_TIMESTAMP}" --build-arg COMMIT_SHA="${CI_COMMIT_SHA}" . 24 | - docker push "${CI_REGISTRY_IMAGE}:${CI_COMMIT_SHA}" 25 | - docker push "${CI_REGISTRY_IMAGE}:latest" 26 | -------------------------------------------------------------------------------- /Dockerfile: -------------------------------------------------------------------------------- 1 | FROM docker.io/alpine:3.13 2 | LABEL maintainer='Alex Wicks ' 3 | 4 | # BUILD_DATE="$(date -u +'%Y-%m-%dT%H:%M:%SZ')" 5 | # COMMIT_SHA="$(git rev-parse HEAD 2>/dev/null || echo 'null')" 6 | ARG BUILD_DATE COMMIT_SHA 7 | 8 | # https://github.com/opencontainers/image-spec/blob/master/spec.md 9 | LABEL org.opencontainers.image.title='openconnect' \ 10 | org.opencontainers.image.created="${BUILD_DATE}" \ 11 | org.opencontainers.image.description='AnyConnect-compatible client to route host traffic' \ 12 | org.opencontainers.image.documentation='https://github.com/aw1cks/openconnect/blob/master/README.md' \ 13 | org.opencontainers.image.version='1.0' \ 14 | org.opencontainers.image.source='https://github.com/aw1cks/openconnect' \ 15 | org.opencontainers.image.revision="${COMMIT_SHA}" 16 | 17 | RUN apk add --no-cache openconnect dnsmasq 18 | 19 | WORKDIR /vpn 20 | COPY ./entrypoint.sh . 21 | 22 | HEALTHCHECK --start-period=15s --retries=1 \ 23 | CMD pgrep openconnect || exit 1; pgrep dnsmasq || exit 1 24 | 25 | ENTRYPOINT ["/vpn/entrypoint.sh"] 26 | -------------------------------------------------------------------------------- /examples/run.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | set -e 4 | 5 | SCRIPT=$(readlink -f "$0") 6 | SCRIPT_PATH=$(dirname "$SCRIPT") 7 | # shellcheck disable=SC1091 8 | . "${SCRIPT_PATH}/env" 9 | 10 | sudo docker run --rm -d \ 11 | --cap-add NET_ADMIN \ 12 | --name "${CONTAINER_NAME}" \ 13 | -p 127.0.0.1:53:53/udp \ 14 | -e URL="${URL}" \ 15 | -e USER="${USER}" \ 16 | -e AUTH_GROUP="${AUTH_GROUP}" \ 17 | -e PASS="${PASS}" \ 18 | -e OTP="${OTP}" \ 19 | -e SEARCH_DOMAINS="${SEARCH_DOMAINS}" \ 20 | -e EXTRA_ARGS="${EXTRA_ARGS}" \ 21 | docker.io/aw1cks/openconnect 22 | 23 | CONTAINER_GW=$(sudo docker inspect "${CONTAINER_NAME}" | jq -r '.[0].NetworkSettings.Networks.bridge.IPAddress') 24 | # shellcheck disable=SC2153 25 | for ROUTE in ${ROUTES} 26 | do 27 | sudo ip route add "${ROUTE}" via "${CONTAINER_GW}" 28 | done 29 | 30 | RESOLV_CONFIG=$(grep -v '^nameserver' /etc/resolv.conf | grep -v search) 31 | ORIGINAL_SEARCH_DOMAINS=$(grep '^search' /etc/resolv.conf) 32 | NEW_SEARCH_DOMAINS="${ORIGINAL_SEARCH_DOMAINS} ${SEARCH_DOMAINS}" 33 | NEW_NAMESERVER_CONF='nameserver 127.0.0.1' 34 | sudo cp /etc/resolv.conf /etc/resolv.conf.orig 35 | printf "%s\n%s\n%s\n" "${RESOLV_CONFIG}" "${NEW_SEARCH_DOMAINS}" "${NEW_NAMESERVER_CONF}" | sudo tee /etc/resolv.conf > /dev/null 2>&1 36 | -------------------------------------------------------------------------------- /.github/workflows/main.yml: -------------------------------------------------------------------------------- 1 | name: Build 2 | 3 | permissions: 4 | contents: read 5 | packages: write 6 | 7 | on: 8 | push: 9 | branches: 10 | - master 11 | pull_request: 12 | branches: 13 | - master 14 | workflow_dispatch: 15 | 16 | jobs: 17 | shellcheck: 18 | name: Shellcheck 19 | runs-on: ubuntu-latest 20 | steps: 21 | - uses: actions/checkout@v2 22 | - name: Run Shellcheck 23 | uses: ludeeus/action-shellcheck@master 24 | docker: 25 | name: Docker Build 26 | needs: 27 | - shellcheck 28 | runs-on: ubuntu-latest 29 | steps: 30 | - name: QEMU 31 | uses: docker/setup-qemu-action@v1 32 | 33 | - name: BuildKit 34 | uses: docker/setup-buildx-action@v1 35 | 36 | - name: Login to Docker Hub 37 | uses: docker/login-action@v1 38 | with: 39 | username: ${{ secrets.DOCKER_HUB_USERNAME }} 40 | password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }} 41 | 42 | - name: Login to GHCR 43 | uses: docker/login-action@v1 44 | with: 45 | registry: ghcr.io 46 | username: ${{ github.repository_owner }} 47 | password: ${{ secrets.GITHUB_TOKEN }} 48 | 49 | - name: Login to quay.io 50 | uses: docker/login-action@v1 51 | with: 52 | registry: quay.io 53 | username: ${{ secrets.QUAY_USERNAME }} 54 | password: ${{ secrets.QUAY_TOKEN }} 55 | 56 | - name: Get current time 57 | uses: 1466587594/get-current-time@v2 58 | id: current-time 59 | 60 | - name: Build and push 61 | id: docker_build 62 | uses: docker/build-push-action@v2 63 | with: 64 | push: true 65 | platforms: linux/amd64,linux/arm64 66 | build-args: | 67 | BUILD_DATE=${{ steps.current-time.outputs.time }} 68 | COMMIT_SHA=${{ github.sha }} 69 | tags: | 70 | docker.io/aw1cks/openconnect:latest 71 | docker.io/aw1cks/openconnect:${{ github.sha }} 72 | ghcr.io/${{ github.repository }}:latest 73 | ghcr.io/${{ github.repository }}:${{ github.sha }} 74 | quay.io/aw1cks/openconnect:latest 75 | quay.io/aw1cks/openconnect:${{ github.sha }} 76 | 77 | - name: Image digest 78 | run: echo ${{ steps.docker_build.outputs.digest }} 79 | -------------------------------------------------------------------------------- /entrypoint.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | # 3 | # Alex Wicks, 2021 4 | # github.com/aw1cks 5 | # 6 | 7 | get_resolv_nameservers() { 8 | grep '^nameserver' /etc/resolv.conf | awk '{print $2}' 9 | } 10 | 11 | printf "\e[32m 12 | ___ ___ ___ __ ___ ___ __ __ ___ ___ __ ___ 13 | // ) ) // ) ) //___) ) // ) ) // ) ) // ) ) // ) ) // ) ) //___) ) // ) ) / / 14 | // / / //___/ / // // / / // // / / // / / // / / // // / / 15 | ((___/ / // ((____ // / / ((____ ((___/ / // / / // / / ((____ ((____ / / 16 | \e[0m\n" 17 | 18 | # Test for presence of required vars 19 | if [ -z "${URL}" ] 20 | then 21 | printf "\e[31m\$URL is not set\n\e[0m" 22 | exit 1 23 | fi 24 | printf "\e[33mURL:\e[0m %s \n" "${URL}" 25 | 26 | if [ -z "${USER}" ] 27 | then 28 | printf "\e[31m\$USER is not set\e[0m\n" 29 | exit 2 30 | fi 31 | printf "\e[33mUsername:\e[0m %s\n" "${USER}" 32 | 33 | if [ -z "${PASS}" ] 34 | then 35 | printf "\e[31m\$PASS is not set\e[0m\n" 36 | exit 3 37 | fi 38 | printf "\e[33mPassword:\e[0m [REDACTED]\n\n" 39 | 40 | printf "\e[32mSetting mandatory arguments...\e[0m\n" 41 | # Set user 42 | OPENCONNECT_ARGS="--background --user=${USER} -i tun127 --passwd-on-stdin --non-inter" 43 | 44 | # Test for auth group 45 | printf "\e[32mChecking for authentication group parameter...\e[0m\n" 46 | if [ -n "${AUTH_GROUP}" ] 47 | then 48 | OPENCONNECT_ARGS="${OPENCONNECT_ARGS} --authgroup=${AUTH_GROUP}" 49 | fi 50 | 51 | # Add any additional arguments 52 | printf "\e[32mChecking for additional arguments...\e[0m\n" 53 | if [ -n "${EXTRA_ARGS}" ] 54 | then 55 | OPENCONNECT_ARGS="${OPENCONNECT_ARGS} ${EXTRA_ARGS}" 56 | fi 57 | 58 | # URL needs to be the last argument 59 | printf "\e[32mSetting URL...\e[0m\n" 60 | OPENCONNECT_ARGS="${OPENCONNECT_ARGS} ${URL}" 61 | 62 | printf "\e[32mStarting OpenConnect VPN...\e[0m\n" 63 | printf "\e[33mArguments:\e[0m %s\n\n" "${OPENCONNECT_ARGS}" 64 | # shellcheck disable=SC2086 65 | (echo "${PASS}"; [ -n "${OTP}" ] && echo "${OTP}") | openconnect ${OPENCONNECT_ARGS} 66 | 67 | # Add our initial dnsmasq config 68 | printf '# Static options 69 | no-resolv 70 | strict-order 71 | 72 | # Dynamically populated upstream servers\n' > /etc/dnsmasq.d/dns.conf 73 | 74 | # Get the pre-VPN state from resolv.conf 75 | OLD_RESOLV=$(get_resolv_nameservers) 76 | 77 | # Sleep until the VPN comes up 78 | # Otherwise the VPNC script won't populate resolv.conf 79 | while ! grep -q VPNC /etc/resolv.conf 80 | do 81 | sleep 5 82 | done 83 | 84 | # Add our dNAT now - since we know the VPN is up due to above 85 | iptables -t nat -A POSTROUTING -o tun127 -j MASQUERADE 86 | 87 | # Get our DNS Servers again, now that the VPNC script updated them 88 | # Then populate the servers in dnsmasq config 89 | NEW_RESOLV=$(get_resolv_nameservers) 90 | 91 | for LOCAL_DOMAIN_SRV in ${OLD_RESOLV} 92 | do 93 | printf "server=%s\n" "${LOCAL_DOMAIN_SRV}" >> /etc/dnsmasq.d/dns.conf 94 | done 95 | 96 | # Add any extra search domains, if specified 97 | # Append them, after existing search domains, so that the host resolv.conf takes precedence 98 | if [ -n "${SEARCH_DOMAINS}" ] 99 | then 100 | # Docker bind mounts resolv.conf at runtime 101 | # This weirdness bypasses an error that looks as such: 102 | # sed: can't move '/etc/resolv.confahaCgd' to '/etc/resolv.conf': Resource busy 103 | # shellcheck disable=SC2005 104 | echo "$(sed "/search/ s/$/ ${SEARCH_DOMAINS}/" /etc/resolv.conf)" > /etc/resolv.conf 105 | # Add search domains as forwarders. 106 | # This prevents DNS leaks, since only these domains will be resolved via VPN-configured DNS servers. 107 | printf ' 108 | # DNS forwarders\n' >> /etc/dnsmasq.d/dns.conf 109 | for REMOTE_DOMAIN_SRV in ${NEW_RESOLV} 110 | do 111 | for DOMAIN in ${SEARCH_DOMAINS} 112 | do 113 | printf "server=/%s/%s\n" "${DOMAIN}" "${REMOTE_DOMAIN_SRV}" >> /etc/dnsmasq.d/dns.conf 114 | done 115 | done 116 | fi 117 | 118 | printf "\n\e[32mStarting dnsmasq...\e[0m\n" 119 | dnsmasq -k --log-facility=- -C /etc/dnsmasq.d/dns.conf 120 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # OpenConnect Docker Container 2 | 3 | ![github](https://github.com/aw1cks/openconnect/actions/workflows/main.yml/badge.svg) 4 | ![gitlab](https://gitlab.com/aw1cks/openconnect/badges/master/pipeline.svg) 5 | 6 | ## Why? 7 | 8 | OpenConnect doesn't ship with any init scripts or systemd units. 9 | It's also not easy to non-interactively provide username, password and especially OTP. 10 | Additionally, running in a docker container gives some extra flexibility with routing. 11 | 12 | ## Where can I download it? 13 | 14 | The image is built by GitHub Actions for amd64 & arm64 and pushed to the following repositories: 15 | 16 | - [Docker Hub](https://hub.docker.com/r/aw1cks/openconnect) 17 | - [GitHub Container Registry](https://github.com/users/aw1cks/packages/container/package/openconnect) 18 | - [quay.io](https://quay.io/repository/aw1cks/openconnect) 19 | 20 | There is additionally a build running in GitLab CI published to: 21 | 22 | - [GitLab](https://gitlab.com/aw1cks/openconnect/container_registry/2011097) 23 | 24 | ## How do I use it? 25 | 26 | It's recommended to use the helper scripts [as described below](#helper-scripts). 27 | 28 | Otherwise, you can run the container using the specified arguments below. 29 | 30 | ### Basic container command 31 | 32 | ```shell 33 | docker run -d \ 34 | --cap-add NET_ADMIN \ 35 | -e URL=https://my.vpn.com \ 36 | -e USER=myuser \ 37 | -e AUTH_GROUP=mygroup \ 38 | -e PASS=mypassword \ 39 | -e OTP=123456 \ 40 | -e SEARCH_DOMAINS="my.corporate-domain.com subdomain.my.corporate-domain.com" \ 41 | docker.io/aw1cks/openconnect' 42 | ``` 43 | 44 | ### All container arguments 45 | 46 | | Variable | Explanation | Example Value | 47 | |------------------|----------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------| 48 | | `URL` | URL of AnyConnect VPN | `https://my.vpn.com` | 49 | | `USER` | User to authenticate with | `myuser` | 50 | | `AUTH_GROUP` | Authentication Group to use when connecting to VPN (optional) | `mygroup` | 51 | | `PASS` | Password to authenticate with | `mypassword` | 52 | | `OTP` | OTP/2FA code (optional) | `123456` | 53 | | `SEARCH_DOMAINS` | Search domains to use. DNS for these domains will be routed via the VPN's DNS servers (optional). Separate with a space for multiple domains | `my.corporate-domain.com subdomain.my.corporate-domain.com` | 54 | | `EXTRA_ARGS` | Any additional arguments to be passed to the OpenConnect client (optional). Only use this if you need something specific | `--verbose` | 55 | 56 | ## Helper scripts 57 | 58 | The provided helper scripts in `examples/` will create the container for you and set up the routing table appropriately. 59 | 60 | ### Requirements 61 | - `docker` 62 | - `sudo` (and permissions to run `ip` and `docker` as root) 63 | - `iproute2` 64 | - `jq` 65 | 66 | ### How do they work? 67 | 68 | 1. The `env` file is sourced from the same directory the script lives in 69 | 2. From the above file, all the container arguments are derived. These are passed using `-e` as environment variables to the container. 70 | 3. The container is spawned, then the address of the container is found using `docker inspect` piped to `jq`. 71 | 4. The routes specified in the `env` file are added to the **host** routing table, via the container address discovered in the previous step. 72 | 5. The host resolv.conf is backed up to `/etc/resolv.conf.orig`, then modified to point to the local container on `127.0.0.1`. 73 | 74 | The script which stops the VPN cleans up the routing table, tears down the container, and restores the original `resolv.conf`. 75 | 76 | ### How do I use them? 77 | 78 | ```shell 79 | $ cd $(git rev-parse --show-cdup) 80 | $ cp examples/* . 81 | $ $EDITOR env # set your values here 82 | $ ./run.sh 83 | $ ./stop.sh # Tears down the container and cleans up the routing table 84 | ``` 85 | 86 | ## Building the container yourself 87 | 88 | The following build args are used: 89 | 90 | - `BUILD_DATE` (RFC3339 timestamp) 91 | - `COMMIT_SHA` (commit hash from which image was built) 92 | 93 | ```shell 94 | docker build \ 95 | --build-arg BUILD_DATE="$(date -u +'%Y-%m-%dT%H:%M:%SZ')" \ 96 | --build-arg COMMIT_SHA="$(git rev-parse HEAD 2>/dev/null || echo 'null')" \ 97 | -t openconnect . 98 | ``` 99 | 100 | ## Known issues 101 | 102 | When running not in privileged mode, OpenConnect gives errors such as this: 103 | 104 | `Cannot open "/proc/sys/net/ipv4/route/flush"` 105 | 106 | This is normal and does not impact the operation of the VPN. 107 | 108 | To suppress these errors, run with `--privileged`. 109 | 110 | -------------------------------------------------------------------------------- /LICENSE.md: -------------------------------------------------------------------------------- 1 | GNU Affero General Public License 2 | ================================= 3 | 4 | _Version 3, 19 November 2007_ 5 | _Copyright © 2007 Free Software Foundation, Inc. <>_ 6 | 7 | Everyone is permitted to copy and distribute verbatim copies 8 | of this license document, but changing it is not allowed. 9 | 10 | ## Preamble 11 | 12 | The GNU Affero General Public License is a free, copyleft license for 13 | software and other kinds of works, specifically designed to ensure 14 | cooperation with the community in the case of network server software. 15 | 16 | The licenses for most software and other practical works are designed 17 | to take away your freedom to share and change the works. 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Conveying Non-Source Forms 233 | 234 | You may convey a covered work in object code form under the terms 235 | of sections 4 and 5, provided that you also convey the 236 | machine-readable Corresponding Source under the terms of this License, 237 | in one of these ways: 238 | 239 | * **a)** Convey the object code in, or embodied in, a physical product 240 | (including a physical distribution medium), accompanied by the 241 | Corresponding Source fixed on a durable physical medium 242 | customarily used for software interchange. 243 | * **b)** Convey the object code in, or embodied in, a physical product 244 | (including a physical distribution medium), accompanied by a 245 | written offer, valid for at least three years and valid for as 246 | long as you offer spare parts or customer support for that product 247 | model, to give anyone who possesses the object code either **(1)** a 248 | copy of the Corresponding Source for all the software in the 249 | product that is covered by this License, on a durable physical 250 | medium customarily used for software interchange, for a price no 251 | more than your reasonable cost of physically performing this 252 | conveying of source, or **(2)** access to copy the 253 | Corresponding Source from a network server at no charge. 254 | * **c)** Convey individual copies of the object code with a copy of the 255 | written offer to provide the Corresponding Source. This 256 | alternative is allowed only occasionally and noncommercially, and 257 | only if you received the object code with such an offer, in accord 258 | with subsection 6b. 259 | * **d)** Convey the object code by offering access from a designated 260 | place (gratis or for a charge), and offer equivalent access to the 261 | Corresponding Source in the same way through the same place at no 262 | further charge. You need not require recipients to copy the 263 | Corresponding Source along with the object code. If the place to 264 | copy the object code is a network server, the Corresponding Source 265 | may be on a different server (operated by you or a third party) 266 | that supports equivalent copying facilities, provided you maintain 267 | clear directions next to the object code saying where to find the 268 | Corresponding Source. Regardless of what server hosts the 269 | Corresponding Source, you remain obligated to ensure that it is 270 | available for as long as needed to satisfy these requirements. 271 | * **e)** Convey the object code using peer-to-peer transmission, provided 272 | you inform other peers where the object code and Corresponding 273 | Source of the work are being offered to the general public at no 274 | charge under subsection 6d. 275 | 276 | A separable portion of the object code, whose source code is excluded 277 | from the Corresponding Source as a System Library, need not be 278 | included in conveying the object code work. 279 | 280 | A “User Product” is either **(1)** a “consumer product”, which means any 281 | tangible personal property which is normally used for personal, family, 282 | or household purposes, or **(2)** anything designed or sold for incorporation 283 | into a dwelling. In determining whether a product is a consumer product, 284 | doubtful cases shall be resolved in favor of coverage. For a particular 285 | product received by a particular user, “normally used” refers to a 286 | typical or common use of that class of product, regardless of the status 287 | of the particular user or of the way in which the particular user 288 | actually uses, or expects or is expected to use, the product. A product 289 | is a consumer product regardless of whether the product has substantial 290 | commercial, industrial or non-consumer uses, unless such uses represent 291 | the only significant mode of use of the product. 292 | 293 | “Installation Information” for a User Product means any methods, 294 | procedures, authorization keys, or other information required to install 295 | and execute modified versions of a covered work in that User Product from 296 | a modified version of its Corresponding Source. The information must 297 | suffice to ensure that the continued functioning of the modified object 298 | code is in no case prevented or interfered with solely because 299 | modification has been made. 300 | 301 | If you convey an object code work under this section in, or with, or 302 | specifically for use in, a User Product, and the conveying occurs as 303 | part of a transaction in which the right of possession and use of the 304 | User Product is transferred to the recipient in perpetuity or for a 305 | fixed term (regardless of how the transaction is characterized), the 306 | Corresponding Source conveyed under this section must be accompanied 307 | by the Installation Information. But this requirement does not apply 308 | if neither you nor any third party retains the ability to install 309 | modified object code on the User Product (for example, the work has 310 | been installed in ROM). 311 | 312 | The requirement to provide Installation Information does not include a 313 | requirement to continue to provide support service, warranty, or updates 314 | for a work that has been modified or installed by the recipient, or for 315 | the User Product in which it has been modified or installed. Access to a 316 | network may be denied when the modification itself materially and 317 | adversely affects the operation of the network or violates the rules and 318 | protocols for communication across the network. 319 | 320 | Corresponding Source conveyed, and Installation Information provided, 321 | in accord with this section must be in a format that is publicly 322 | documented (and with an implementation available to the public in 323 | source code form), and must require no special password or key for 324 | unpacking, reading or copying. 325 | 326 | ### 7. Additional Terms 327 | 328 | “Additional permissions” are terms that supplement the terms of this 329 | License by making exceptions from one or more of its conditions. 330 | Additional permissions that are applicable to the entire Program shall 331 | be treated as though they were included in this License, to the extent 332 | that they are valid under applicable law. If additional permissions 333 | apply only to part of the Program, that part may be used separately 334 | under those permissions, but the entire Program remains governed by 335 | this License without regard to the additional permissions. 336 | 337 | When you convey a copy of a covered work, you may at your option 338 | remove any additional permissions from that copy, or from any part of 339 | it. (Additional permissions may be written to require their own 340 | removal in certain cases when you modify the work.) You may place 341 | additional permissions on material, added by you to a covered work, 342 | for which you have or can give appropriate copyright permission. 343 | 344 | Notwithstanding any other provision of this License, for material you 345 | add to a covered work, you may (if authorized by the copyright holders of 346 | that material) supplement the terms of this License with terms: 347 | 348 | * **a)** Disclaiming warranty or limiting liability differently from the 349 | terms of sections 15 and 16 of this License; or 350 | * **b)** Requiring preservation of specified reasonable legal notices or 351 | author attributions in that material or in the Appropriate Legal 352 | Notices displayed by works containing it; or 353 | * **c)** Prohibiting misrepresentation of the origin of that material, or 354 | requiring that modified versions of such material be marked in 355 | reasonable ways as different from the original version; or 356 | * **d)** Limiting the use for publicity purposes of names of licensors or 357 | authors of the material; or 358 | * **e)** Declining to grant rights under trademark law for use of some 359 | trade names, trademarks, or service marks; or 360 | * **f)** Requiring indemnification of licensors and authors of that 361 | material by anyone who conveys the material (or modified versions of 362 | it) with contractual assumptions of liability to the recipient, for 363 | any liability that these contractual assumptions directly impose on 364 | those licensors and authors. 365 | 366 | All other non-permissive additional terms are considered “further 367 | restrictions” within the meaning of section 10. If the Program as you 368 | received it, or any part of it, contains a notice stating that it is 369 | governed by this License along with a term that is a further 370 | restriction, you may remove that term. If a license document contains 371 | a further restriction but permits relicensing or conveying under this 372 | License, you may add to a covered work material governed by the terms 373 | of that license document, provided that the further restriction does 374 | not survive such relicensing or conveying. 375 | 376 | If you add terms to a covered work in accord with this section, you 377 | must place, in the relevant source files, a statement of the 378 | additional terms that apply to those files, or a notice indicating 379 | where to find the applicable terms. 380 | 381 | Additional terms, permissive or non-permissive, may be stated in the 382 | form of a separately written license, or stated as exceptions; 383 | the above requirements apply either way. 384 | 385 | ### 8. Termination 386 | 387 | You may not propagate or modify a covered work except as expressly 388 | provided under this License. Any attempt otherwise to propagate or 389 | modify it is void, and will automatically terminate your rights under 390 | this License (including any patent licenses granted under the third 391 | paragraph of section 11). 392 | 393 | However, if you cease all violation of this License, then your 394 | license from a particular copyright holder is reinstated **(a)** 395 | provisionally, unless and until the copyright holder explicitly and 396 | finally terminates your license, and **(b)** permanently, if the copyright 397 | holder fails to notify you of the violation by some reasonable means 398 | prior to 60 days after the cessation. 399 | 400 | Moreover, your license from a particular copyright holder is 401 | reinstated permanently if the copyright holder notifies you of the 402 | violation by some reasonable means, this is the first time you have 403 | received notice of violation of this License (for any work) from that 404 | copyright holder, and you cure the violation prior to 30 days after 405 | your receipt of the notice. 406 | 407 | Termination of your rights under this section does not terminate the 408 | licenses of parties who have received copies or rights from you under 409 | this License. If your rights have been terminated and not permanently 410 | reinstated, you do not qualify to receive new licenses for the same 411 | material under section 10. 412 | 413 | ### 9. Acceptance Not Required for Having Copies 414 | 415 | You are not required to accept this License in order to receive or 416 | run a copy of the Program. Ancillary propagation of a covered work 417 | occurring solely as a consequence of using peer-to-peer transmission 418 | to receive a copy likewise does not require acceptance. However, 419 | nothing other than this License grants you permission to propagate or 420 | modify any covered work. These actions infringe copyright if you do 421 | not accept this License. Therefore, by modifying or propagating a 422 | covered work, you indicate your acceptance of this License to do so. 423 | 424 | ### 10. Automatic Licensing of Downstream Recipients 425 | 426 | Each time you convey a covered work, the recipient automatically 427 | receives a license from the original licensors, to run, modify and 428 | propagate that work, subject to this License. You are not responsible 429 | for enforcing compliance by third parties with this License. 430 | 431 | An “entity transaction” is a transaction transferring control of an 432 | organization, or substantially all assets of one, or subdividing an 433 | organization, or merging organizations. If propagation of a covered 434 | work results from an entity transaction, each party to that 435 | transaction who receives a copy of the work also receives whatever 436 | licenses to the work the party's predecessor in interest had or could 437 | give under the previous paragraph, plus a right to possession of the 438 | Corresponding Source of the work from the predecessor in interest, if 439 | the predecessor has it or can get it with reasonable efforts. 440 | 441 | You may not impose any further restrictions on the exercise of the 442 | rights granted or affirmed under this License. For example, you may 443 | not impose a license fee, royalty, or other charge for exercise of 444 | rights granted under this License, and you may not initiate litigation 445 | (including a cross-claim or counterclaim in a lawsuit) alleging that 446 | any patent claim is infringed by making, using, selling, offering for 447 | sale, or importing the Program or any portion of it. 448 | 449 | ### 11. Patents 450 | 451 | A “contributor” is a copyright holder who authorizes use under this 452 | License of the Program or a work on which the Program is based. The 453 | work thus licensed is called the contributor's “contributor version”. 454 | 455 | A contributor's “essential patent claims” are all patent claims 456 | owned or controlled by the contributor, whether already acquired or 457 | hereafter acquired, that would be infringed by some manner, permitted 458 | by this License, of making, using, or selling its contributor version, 459 | but do not include claims that would be infringed only as a 460 | consequence of further modification of the contributor version. For 461 | purposes of this definition, “control” includes the right to grant 462 | patent sublicenses in a manner consistent with the requirements of 463 | this License. 464 | 465 | Each contributor grants you a non-exclusive, worldwide, royalty-free 466 | patent license under the contributor's essential patent claims, to 467 | make, use, sell, offer for sale, import and otherwise run, modify and 468 | propagate the contents of its contributor version. 469 | 470 | In the following three paragraphs, a “patent license” is any express 471 | agreement or commitment, however denominated, not to enforce a patent 472 | (such as an express permission to practice a patent or covenant not to 473 | sue for patent infringement). To “grant” such a patent license to a 474 | party means to make such an agreement or commitment not to enforce a 475 | patent against the party. 476 | 477 | If you convey a covered work, knowingly relying on a patent license, 478 | and the Corresponding Source of the work is not available for anyone 479 | to copy, free of charge and under the terms of this License, through a 480 | publicly available network server or other readily accessible means, 481 | then you must either **(1)** cause the Corresponding Source to be so 482 | available, or **(2)** arrange to deprive yourself of the benefit of the 483 | patent license for this particular work, or **(3)** arrange, in a manner 484 | consistent with the requirements of this License, to extend the patent 485 | license to downstream recipients. “Knowingly relying” means you have 486 | actual knowledge that, but for the patent license, your conveying the 487 | covered work in a country, or your recipient's use of the covered work 488 | in a country, would infringe one or more identifiable patents in that 489 | country that you have reason to believe are valid. 490 | 491 | If, pursuant to or in connection with a single transaction or 492 | arrangement, you convey, or propagate by procuring conveyance of, a 493 | covered work, and grant a patent license to some of the parties 494 | receiving the covered work authorizing them to use, propagate, modify 495 | or convey a specific copy of the covered work, then the patent license 496 | you grant is automatically extended to all recipients of the covered 497 | work and works based on it. 498 | 499 | A patent license is “discriminatory” if it does not include within 500 | the scope of its coverage, prohibits the exercise of, or is 501 | conditioned on the non-exercise of one or more of the rights that are 502 | specifically granted under this License. You may not convey a covered 503 | work if you are a party to an arrangement with a third party that is 504 | in the business of distributing software, under which you make payment 505 | to the third party based on the extent of your activity of conveying 506 | the work, and under which the third party grants, to any of the 507 | parties who would receive the covered work from you, a discriminatory 508 | patent license **(a)** in connection with copies of the covered work 509 | conveyed by you (or copies made from those copies), or **(b)** primarily 510 | for and in connection with specific products or compilations that 511 | contain the covered work, unless you entered into that arrangement, 512 | or that patent license was granted, prior to 28 March 2007. 513 | 514 | Nothing in this License shall be construed as excluding or limiting 515 | any implied license or other defenses to infringement that may 516 | otherwise be available to you under applicable patent law. 517 | 518 | ### 12. No Surrender of Others' Freedom 519 | 520 | If conditions are imposed on you (whether by court order, agreement or 521 | otherwise) that contradict the conditions of this License, they do not 522 | excuse you from the conditions of this License. If you cannot convey a 523 | covered work so as to satisfy simultaneously your obligations under this 524 | License and any other pertinent obligations, then as a consequence you may 525 | not convey it at all. For example, if you agree to terms that obligate you 526 | to collect a royalty for further conveying from those to whom you convey 527 | the Program, the only way you could satisfy both those terms and this 528 | License would be to refrain entirely from conveying the Program. 529 | 530 | ### 13. Remote Network Interaction; Use with the GNU General Public License 531 | 532 | Notwithstanding any other provision of this License, if you modify the 533 | Program, your modified version must prominently offer all users 534 | interacting with it remotely through a computer network (if your version 535 | supports such interaction) an opportunity to receive the Corresponding 536 | Source of your version by providing access to the Corresponding Source 537 | from a network server at no charge, through some standard or customary 538 | means of facilitating copying of software. This Corresponding Source 539 | shall include the Corresponding Source for any work covered by version 3 540 | of the GNU General Public License that is incorporated pursuant to the 541 | following paragraph. 542 | 543 | Notwithstanding any other provision of this License, you have 544 | permission to link or combine any covered work with a work licensed 545 | under version 3 of the GNU General Public License into a single 546 | combined work, and to convey the resulting work. The terms of this 547 | License will continue to apply to the part which is the covered work, 548 | but the work with which it is combined will remain governed by version 549 | 3 of the GNU General Public License. 550 | 551 | ### 14. Revised Versions of this License 552 | 553 | The Free Software Foundation may publish revised and/or new versions of 554 | the GNU Affero General Public License from time to time. Such new versions 555 | will be similar in spirit to the present version, but may differ in detail to 556 | address new problems or concerns. 557 | 558 | Each version is given a distinguishing version number. If the 559 | Program specifies that a certain numbered version of the GNU Affero General 560 | Public License “or any later version” applies to it, you have the 561 | option of following the terms and conditions either of that numbered 562 | version or of any later version published by the Free Software 563 | Foundation. If the Program does not specify a version number of the 564 | GNU Affero General Public License, you may choose any version ever published 565 | by the Free Software Foundation. 566 | 567 | If the Program specifies that a proxy can decide which future 568 | versions of the GNU Affero General Public License can be used, that proxy's 569 | public statement of acceptance of a version permanently authorizes you 570 | to choose that version for the Program. 571 | 572 | Later license versions may give you additional or different 573 | permissions. However, no additional obligations are imposed on any 574 | author or copyright holder as a result of your choosing to follow a 575 | later version. 576 | 577 | ### 15. Disclaimer of Warranty 578 | 579 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 580 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 581 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY 582 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 583 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 584 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 585 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 586 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 587 | 588 | ### 16. Limitation of Liability 589 | 590 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 591 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 592 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 593 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 594 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 595 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 596 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 597 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 598 | SUCH DAMAGES. 599 | 600 | ### 17. Interpretation of Sections 15 and 16 601 | 602 | If the disclaimer of warranty and limitation of liability provided 603 | above cannot be given local legal effect according to their terms, 604 | reviewing courts shall apply local law that most closely approximates 605 | an absolute waiver of all civil liability in connection with the 606 | Program, unless a warranty or assumption of liability accompanies a 607 | copy of the Program in return for a fee. 608 | 609 | _END OF TERMS AND CONDITIONS_ 610 | 611 | ## How to Apply These Terms to Your New Programs 612 | 613 | If you develop a new program, and you want it to be of the greatest 614 | possible use to the public, the best way to achieve this is to make it 615 | free software which everyone can redistribute and change under these terms. 616 | 617 | To do so, attach the following notices to the program. It is safest 618 | to attach them to the start of each source file to most effectively 619 | state the exclusion of warranty; and each file should have at least 620 | the “copyright” line and a pointer to where the full notice is found. 621 | 622 | 623 | Copyright (C) 624 | 625 | This program is free software: you can redistribute it and/or modify 626 | it under the terms of the GNU Affero General Public License as published by 627 | the Free Software Foundation, either version 3 of the License, or 628 | (at your option) any later version. 629 | 630 | This program is distributed in the hope that it will be useful, 631 | but WITHOUT ANY WARRANTY; without even the implied warranty of 632 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 633 | GNU Affero General Public License for more details. 634 | 635 | You should have received a copy of the GNU Affero General Public License 636 | along with this program. If not, see . 637 | 638 | Also add information on how to contact you by electronic and paper mail. 639 | 640 | If your software can interact with users remotely through a computer 641 | network, you should also make sure that it provides a way for users to 642 | get its source. For example, if your program is a web application, its 643 | interface could display a “Source” link that leads users to an archive 644 | of the code. There are many ways you could offer source, and different 645 | solutions will be better for different programs; see section 13 for the 646 | specific requirements. 647 | 648 | You should also get your employer (if you work as a programmer) or school, 649 | if any, to sign a “copyright disclaimer” for the program, if necessary. 650 | For more information on this, and how to apply and follow the GNU AGPL, see 651 | <>. 652 | 653 | --------------------------------------------------------------------------------