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gerrit.openbmc.org / openbmc / bmcweb / 06fe2750bcacbe0a12f91ba5eaf1780fde60e028
commit06fe2750bcacbe0a12f91ba5eaf1780fde60e028[log] [tgz]
authorEd Tanous <edtanous@google.com>Tue Sep 13 12:11:19 2022 -0700
committerEd Tanous <edtanous@google.com>Tue Sep 13 12:22:32 2022 -0700
treefb143dc4fed74330487b6813559b56175b433176
parent99351cd856038475cac146029e5db03767a1459c [diff]
Make Accepts: */* default to JSON

There are apparently libraries that use an Accepts header of */*,
instead of simply omitting the Accepts header, or providing a more
correct value for that header.

99351cd856038475cac146029e5db03767a1459c Improve content type

The above commit attempted to refine our handling of this header, and
changed the behavior for */* to default to HTML.  While this is arguably
"correct" to the HTTP RFC, and the clients that do this are definitely
wrong in their implementation, we can try to shield them a little from
their incorrectness, and we can certainly avoid compatibility issues
with these clients, without effecting the clients that implement the
spec correctly.

This commit changes the priority order of Accepts header to JSON then
HTML, instead of the other way around.

Tested:
curl --insecure -H "Accept: */*" --user root:0penBmc \
https://192.168.7.2/redfish/v1

Now returns a json payload.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I7850a3afb0b5d635f8d632fb0a9f790e53fe4466
1 file changed
tree: fb143dc4fed74330487b6813559b56175b433176
  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. .openbmc-enforce-gitlint
  15. .shellcheck
  16. bmcweb.service.in
  17. bmcweb.socket.in
  18. bmcweb_config.h.in
  19. build_x86.sh
  20. build_x86_docker.sh
  21. CLIENTS.md
  22. COMMON_ERRORS.md
  23. DEVELOPING.md
  24. Dockerfile
  25. Dockerfile.base
  26. HEADERS.md
  27. LICENSE
  28. meson.build
  29. meson_options.txt
  30. OEM_SCHEMAS.md
  31. OWNERS
  32. pam-webserver
  33. README.md
  34. Redfish.md
  35. run-ci
  36. setup.cfg
  37. 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.