The rpcd ucode plugin allows utilizing ucode scripts to register ubus
objects and to implement the objects method callbacks.
Upon startup, rpcd will compile and execute each ucode script in
`$INSTALL_PREFIX/share/ucode/` and register ubus proxy objects and
methods definitions according to the signature returned by the script.
Refer to examples/ucode/example-plugin.uc for details of the signature
format.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Drop the historically inherited "luci-rpc-" prefix and replace it with a
more appropriate "rpcd-plugin-" string.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Search plugins, ACL ressources and other data files relative to the compile
time CMAKE_INSTALL_PREFIX instead of hardcoding `/usr`.
Also ensure that plugin libraries are installed into the lib/rpcd subdir.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
We need to use blobmsg_get_u64 for RPC_DUMP_EXPIRES as this is now
BLOBMSG_TYPE_INT64.
Fixes: 20bf958bea ("session: use uloop_timeout_remaining64")
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Acked-by: Jo-Philipp Wich <jo@mein.io>
Currently, rpcd cached /etc/config/rpcd once on the first login and then
keeps checking login attempts and ACL settings against the in-memory
copy until the process is restarted.
This is not desirable as we would like added, modified or removed accounts
to be effective immediately. In order to achive this behaviour, ensure to
unload the currently loaded rpcd configuration before looking up the login
account section.
Ref: https://github.com/openwrt/luci/issues/5179
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Expose 802.11ax HE rate as well as HW / HT mode information. This is
required to add 802.11ax support to LuCI.
Signed-off-by: David Bauer <mail@david-bauer.net>
Having the ABI version appended to the package name is not very helpful
when checking for updated versions of a package online or requesting
a new image for the device from an updater service. In both cases,
the ABI version could have been bumped meanwhile and that name is then
simply not found.
Resolve this by removing the appended ABI version in the output of the
rpc-sys packagelist call.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This is required to avoid potential use-after-free errors through the
uci_set()->uci_delete()->uci_expand_ptr() call chain when passing
zero-length strings as values.
Ref: https://bugs.openwrt.org/index.php?do=details&task_id=3528
Suggested-by: olegio170 <olegios170@gmail.com>
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Iwinfo export the center channel sued by the wifi. Include this data in
the ubus info call to better know the channel utilizzation of the wifi.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Iwinfo exports ht and vht operation info useful to get channel info of
nearby stations. Add these new info to ubus output.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
The special characters '!' and '*' in /etc/shadow are
used to disable password login for a specific account.
The character 'x' has no special meaning, but should not
be interpreted as an empty password.
However, rpcd did treat these special characters like no
password was set, which allows access even though the account
is disabled.
By removing the additional checks for these characters, the
encrypted password string is passed to crypt, which returns NULL
if the salt has an invalid format and therefore access is denied.
Fixes: FS#2634
Signed-off-by: Fabian Bläse <fabian@blaese.de>
When the initial exec permission check on the executable path fails,
concatenate the command line with spaces and use the resulting string
as lookup path for a second exec permission check.
This allows for exec acls similar to this example:
"file": {
"/usr/bin/program --flag --option=1 arg *": [ "exec" ]
}
The example above would allow executing `/usr/bin/program` with the
arguments `--flag`, `--option=1` and `arg` in exactly this order,
followed by any number of optional arguments as denoted by the
asterisk.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
When parsing the JSON output of exec plugins, store integer values exceeding
32bit value limits as 64bit integer blob values.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Prevent a theoretical leak of the args memory when the executable path
cannot be found.
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
[fix whitespace, commit description]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
A previous commit changed the allocation method for the call context to
include the method name string memory directly, so we must not treat the
method member separately anymore.
Fixes: 37aa919 ("plugin: fix leaking invoked method name for exec plugins")
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
In some cases, e.g. when subsequently setting multiple empty option
values, uci_set() might free the section pointer of the given reused
uci_ptr structure without zeroing it, leading to a use-after-free on
processing subsequent options.
Avoid this issue by clearing the lookup pointer flags in order to
prevent uci_set() from incorrectly branching into a uci_delete()
operation leading to the freeing of the section member.
Ref: http://lists.infradead.org/pipermail/openwrt-devel/2019-October/019592.html
Reported-by: Daniel Danzberger <daniel@dd-wrt.com>
Suggested-by: Yousong Zhou <yszhou4tech@gmail.com>
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
The invoked method name was separately duplicated from the call_context
structure. The structure itself is eventually freed by rpc_exec_reply()
but the method string it points to is lost after that.
Use calloc_a() instead to allocate the string copy buffer together with
the context structure, to ensure that all involved memory is freed.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Some sysfs or proc files contain more than 128 byte of data, e.g. the
/proc/filesystems or /proc/mounts files.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Refactor rpc_check_path() and wrap it with a macro to allow passing
different policies and permission names.
This allows using the function for non-read operations and simplifies
the message parsing code there.
Also change the stat and list methods to require "list" instead of
"read" permissions which is useful to allow browing the filesystem
without allowing read access to all files.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Move the timespec declaration to the function header, as mentioned in
commit "rpcd: Switch to nanosleep".
Fixes: 604db20 ("rpcd: Switch to nanosleep")
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
usleep has been deprecated by POSIX.1-2001 and removed in POSIX.1-2008.
Fixes compilation when libc does not include usleep (optional with
uClibc-ng).
nanosleep also has the advantage of being more accurate.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
[move timespec definition to the top of the function]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Introduce ACL checks to verify that the requested path may be read, written
or executed. This allows to restrict ubus file commands to specific paths.
To setup the required ACLs, the following ubus command may be used
on the command line:
ubus call session grant '{
"ubus_rpc_session": "d41d8cd98f00b204e9800998ecf8427e",
"scope": "file",
"objects": [
[ "/etc", "read" ],
[ "/etc/*", "write" ],
[ "/sbin/sysupgrade", "exec" ]
]
}'
The "read", "list", "stat" and "md5" procedures require "read" permissions,
the "write" procedure requires "write" permission and the "exec" procedure
requires "exec" permissions.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
The crypt() function may return NULL with errno ENOSYS when an attempt
was made to crypt the plaintext password using a salt requesting an
unsupported cipher.
Avoid triggering segmentation faults in the subsequent strcmp() operation
by checking for a non-NULL hash value.
Fixes: FS#2291
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
This prevents broken pipe errors in executed child processes that
attempt to access stdin.
Suggested-by: Vytautas Virvičius <vy.virvicius@gmail.com>
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
- Store the realloc result in a separate pointer so that we can free
the original on allocation failure
- Use an explicit uint8_t for the argument vector length instead of
"char" which might be signed or unsigned, depending on the arch
- Bail out with an invalid argument error if the argument vector
exceeds 255 items
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
