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gerrit.openbmc.org / openbmc / bmcweb / c7b9cb3525b130fa5befe2c231c6d062cac44851
commitc7b9cb3525b130fa5befe2c231c6d062cac44851[log] [tgz]
authorEd Tanous <edtanous@google.com>Thu Feb 11 13:28:35 2021 -0800
committerEd Tanous <ed@tanous.net>Sat Feb 13 01:00:27 2021 +0000
treeb6ff62a15bd06d7caf0ac48ed541868e1c16af2c
parentd5afb2caeb6e797f0f0920eaf857a6d63f194cbe [diff]
Bind dev server to ipv4 only

On systems that don't support ipv6, or systems that don't have an ipv6
address, binding to all ipv6 addresses can fail.  Because this is just
the dev server, it's perfectly reasonable to limit to ipv4 addresses
only.

This failure has been reported by several people over time, but it was only
recently that I root caused this as their problem.

This should have no effect on the BMC itself, as the bmc is using socket
activation, and completely bypasses this code path.

Tested:
Launched bmcweb on a system that was previously failing because of a
bind error, and observed that I could launch bmcweb and have it work
correctly.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ife6b051aa62d62e1691c5221d8ddee0b9bd012c0
1 file changed
tree: b6ff62a15bd06d7caf0ac48ed541868e1c16af2c
  1. http/
  2. include/
  3. redfish-core/
  4. scripts/
  5. src/
  6. static/
  7. subprojects/
  8. .clang-format
  9. .clang-ignore
  10. .clang-tidy
  11. .dockerignore
  12. .gitignore
  13. .shellcheck
  14. bmcweb.service.in
  15. bmcweb.socket
  16. build_x86.sh
  17. build_x86_docker.sh
  18. COMMON_ERRORS.md
  19. DEVELOPING.md
  20. Dockerfile
  21. Dockerfile.base
  22. LICENCE
  23. MAINTAINERS
  24. meson.build
  25. meson_options.txt
  26. OEM_SCHEMAS.md
  27. OWNERS
  28. pam-webserver
  29. README.md
  30. Redfish.md
README.md

OpenBMC webserver

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

Capabilities

At this time, the webserver implements a few interfaces:

  • Authentication middleware that supports cookie and token based authentication, as well as CSRF prevention backed by linux PAM authentication credentials.
  • An (incomplete) attempt at replicating phosphor-dbus-rest interfaces in C++. Right now, a few of the endpoint definitions work as expected, but there is still a lot of work to be done. The portions of the interface that are functional are designed to work correctly for phosphor-webui, but may not yet be complete.
  • Replication of the rest-dbus backend interfaces to allow bmc debug to logged in users.
  • An initial attempt at a read-only redfish interface. Currently the redfish interface targets ServiceRoot, SessionService, AccountService, Roles, and ManagersService. Some functionality here has been shimmed to make development possible. For example, there exists only a single user role.
  • SSL key generation at runtime. See the configuration section for details.
  • Static file hosting. Currently, static files are hosted from the fixed location at /usr/share/www. This is intended to allow loose coupling with yocto projects, and allow overriding static files at build time.
  • Dbus-monitor over websocket. A generic endpoint that allows UIs to open a websocket and register for notification of events to avoid polling in single page applications. (this interface may be modified in the future due to security concerns.

Configuration

BMCWeb is configured by setting -D flags that correspond to options in bmcweb/meson_options.txt and then compiling. For example, meson <builddir> -Dkvm=disabled ... followed by ninja in build directory. The option names become C++ preprocessor symbols that control which code is compiled into the program.

Compile bmcweb with default options:

meson builddir
ninja -C builddir

Compile bmcweb with yocto defaults:

meson builddir -Dbuildtype=minsize -Db_lto=true -Dtests=disabled
ninja -C buildir

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

Enable/Disable meson wrap feature

meson builddir -Dwrap_mode=nofallback
ninja -C builddir

Generate test coverage report:

meson builddir -Db_coverage=true -Dtests=enabled
ninja coverage -C builddir test

When BMCWeb starts running, it reads persistent configuration data (such as UUID and session data) from a local file. If this is not usable, it generates a new configuration.

When BMCWeb SSL support is enabled and a usable certificate is not found, it will generate a self-sign a certificate before launching the server. The keys are generated by the secp384r1 algorithm. The certificate

  • is issued by C=US, O=OpenBMC, CN=testhost,
  • is valid for 10 years,
  • has a random serial number, and
  • is signed using the SHA-256 algorithm.