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gerrit.openbmc.org / openbmc / bmcweb / 5b224921d765a93c5f93a6012109a9a748ef7cd4
commit5b224921d765a93c5f93a6012109a9a748ef7cd4[log] [tgz]
authorEd Tanous <edtanous@google.com>Wed Jun 22 19:00:59 2022 -0700
committerEd Tanous <ed@tanous.net>Sun Jul 31 23:05:10 2022 +0000
tree8ed315bf8ae8032383f810c65fb670add6c552b9
parent75b63a2cfe2560b2d4267349882f19538c1fe2f2 [diff]
ServiceRoot Support Link header

The Redfish standard in section 8.2 states:
A Link header containing rel=describedby shall be returned on GET and
HEAD requests for Redfish resources. If the referenced JSON Schema is a
versioned schema, it shall match the version contained in the value of
the @odata.type property returned in this resource.

This commit attempts to add this capability to ServiceRoot.  Future
similar patches will start adding this across the tree.

To do this, a few things happen.  First, this removes the implicit HEAD
handling in the router.  Because we now need explicit HEAD handling
per-route with specific headers, there's no good way to make this
generic.
Next, it rearranges the code such that handleServiceRootGet can first
call handleServiceRootHead, to avoid duplicating the addHeader call.

Tested: Redfish protocol validator passes the
RESP_HEADERS_REL_LINK_DESCRIBED_BY check for ServiceRoot.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I92248089a3545432c14f551309ea62332e554647
3 files changed
tree: 8ed315bf8ae8032383f810c65fb670add6c552b9
  1. .github/
  2. http/
  3. include/
  4. redfish-core/
  5. scripts/
  6. src/
  7. static/
  8. subprojects/
  9. .clang-format
  10. .clang-ignore
  11. .clang-tidy
  12. .dockerignore
  13. .gitignore
  14. .shellcheck
  15. bmcweb.service.in
  16. bmcweb.socket.in
  17. bmcweb_config.h.in
  18. build_x86.sh
  19. build_x86_docker.sh
  20. CLIENTS.md
  21. COMMON_ERRORS.md
  22. DEVELOPING.md
  23. Dockerfile
  24. Dockerfile.base
  25. HEADERS.md
  26. LICENSE
  27. meson.build
  28. meson_options.txt
  29. OEM_SCHEMAS.md
  30. OWNERS
  31. pam-webserver
  32. README.md
  33. Redfish.md
  34. run-ci
  35. setup.cfg
  36. TESTING.md
README.md

OpenBMC webserver

This component attempts to be a "do everything" embedded webserver for OpenBMC.

Features

The webserver implements a few distinct interfaces:

  • DBus event websocket. Allows registering on changes to specific dbus paths, properties, and will send an event from the websocket if those filters match.
  • OpenBMC DBus REST api. Allows direct, low interference, high fidelity access to dbus and the objects it represents.
  • Serial: A serial websocket for interacting with the host serial console through websockets.
  • Redfish: A protocol compliant, (Redfish.md)[DBus to Redfish translator].
  • KVM: A websocket based implementation of the RFB (VNC) frame buffer protocol intended to mate to webui-vue to provide a complete KVM implementation.

Protocols

bmcweb at a protocol level supports http and https. TLS is supported through OpenSSL.

AuthX

Authentication

Bmcweb supports multiple authentication protocols:

  • Basic authentication per RFC7617
  • Cookie based authentication for authenticating against webui-vue
  • Mutual TLS authentication based on OpenSSL
  • Session authentication through webui-vue
  • XToken based authentication conformant to Redfish DSP0266

Each of these types of authentication is able to be enabled or disabled both via runtime policy changes (through the relevant Redfish APIs) or via configure time options. All authentication mechanisms supporting username/password are routed to libpam, to allow for customization in authentication implementations.

Authorization

All authorization in bmcweb is determined at routing time, and per route, and conform to the Redfish PrivilegeRegistry.

*Note: Non-Redfish functions are mapped to the closest equivalent Redfish privilege level.

Configuration

bmcweb is configured per the meson build files. Available options are documented in meson_options.txt

Compile bmcweb with default options:

meson builddir
ninja -C builddir

If any of the dependencies are not found on the host system during configuration, meson will automatically download them via its wrap dependencies mentioned in bmcweb/subprojects.

Debug logging

bmcweb by default is compiled with runtime logging disabled, as a performance consideration. To enable it in a standalone build, add the

-Dlogging='enabled'

option to your configure flags. If building within Yocto, add the following to your local.conf.

EXTRA_OEMESON:pn-bmcweb:append = "-Dbmcweb-logging='enabled'"

Use of persistent data

bmcweb relies on some on-system data for storage of persistent data that is internal to the process. Details on the exact data stored and when it is read/written can seen from the persistent_data namespace.

TLS certificate generation

When SSL support is enabled and a usable certificate is not found, bmcweb will generate a self-signed a certificate before launching the server. Please see the bmcweb source code for details on the parameters this certificate is built with.