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* udp: Don't pre-initialize msghdr arrayDavid Gibson2022-09-131-1/+5
| | | | | | | | | | | | In udp_tap_handler() the array of msghdr structures, mm[], is initialized to zero. Since UIO_MAXIOV is 1024, this can be quite a large zero, which is expensive if we only end up using a few of its entries. It also makes it less obvious how we're setting all the control fields at the point we actually invoke sendmmsg(). Rather than pre-initializing it, just initialize each element as we use it. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Move perf.js report file to $LOGDIR/webDavid Gibson2022-09-133-4/+4
| | | | | | | | | The tests generate a performance report in $BASEPATH/perf.js and hooks/pre-push copies it to the website. To avoid cluttering the working directory, instead put perf.js in $LOGDIR/web, since it's a test output artefact. Update hooks/pre-push to copy from its new location. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Move video processing files to $STATEBASEDavid Gibson2022-09-134-30/+31
| | | | | | | | | | | | | The asciinema video handling creates a number of temporary files (.uncat, .start, .stop) which currently go into the source tree. Put them in the temporary state directory to avoid clutter. The final processed output is now placed into test_logs/web/ along with the corresponding .js file with links, since they're essentially test artefacts. hooks/pre-push is updated to look for those files in the new location when updating the web site. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* demo: Move pidfiles to state directoryDavid Gibson2022-09-132-7/+8
| | | | | | | Avoiding putting them in bare /tmp means they will be automatically cleaned up with everything else. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Move pidfiles and nsholder sockets into state directoryDavid Gibson2022-09-134-36/+35
| | | | | | | Currently they go in the passt source tree with a fixed names, which means their presence can mess with subsequent test runs. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Store pcap files in $LOGDIR instead of /tmpDavid Gibson2022-09-131-8/+8
| | | | | | | The capture files are more or less a different form of log output from the tests, so place them in $LOGDIR. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Move pause temporary file to state directoryDavid Gibson2022-09-131-2/+2
| | | | Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Use paths in __STATEDIR__ instead of 'temp' and 'tempdir' directivesDavid Gibson2022-09-1315-82/+69
| | | | | | | | | | | | Instead of using the 'temp' and 'tempdir' DSL directives to create temporary files, use fixed paths relative to __STATEDIR__. This has two advantages: 1) The files are automatically cleaned up if the tests fail (and even if that doesn't work they're easier to clean up manuall) 2) When debugging tests it's easier to figure out which of the temporary files are relevant to whatever's going wrong Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Don't redundantly regenerate small test file in pasta/tcpDavid Gibson2022-09-131-3/+0
| | | | | | | In what looks like a copy/paste error, pasta/tcp generates its small test file twice. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Move context temporary files to state dirDavid Gibson2022-09-131-29/+32
| | | | | | | | | Currently the context command dispatch subsystem creates a bunch of temporary files in $LOGDIR, which is messy. Store them in $STATEDIR which is for precisely this purpose. The logs from each context still go into $LOGDIR. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Move passt_test_log_pipe to state directoryDavid Gibson2022-09-133-19/+16
| | | | | | | We use this fifo to send messages to the information pane. Put it in the state directory so it doesn't need its own cleanup. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Create common state directories for temporary filesDavid Gibson2022-09-134-1/+9
| | | | | | | | | | | | | | | | | | The test scripts create a bunch of temporary files to keep track of internal state. Some are made in /tmp with individual mktemp calls, some go in the passt source directory, and some go in $LOGDIR. This can sometimes make it messy to clean up after failed test runs. Start cleaning this up by creating a single "state" directory ($STATEBASE) in /tmp for all the state or temporary files used by a single test run. Clean it up automatically in cleanup() - except when DEBUG==1, because those files can be useful for debugging test script failures. We create subdirectories under $STATEBASE for each setup function, exposed as $STATESETUP. We also create subdirectories for each test script and expose those to the scripts as __STATEDIR__. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Actually run cleanup functionDavid Gibson2022-09-131-1/+0
| | | | | | | | | | | | | | We install a cleanup() function with 'trap' in order to clean up temporary files we generate during the tests. However, we deinstall it after run_term, which means it won't run in most of the cases where it would be useful. Even if "run from_term" exits with an error, that error will be hidden from the run_term wrapper because it's within a tmux session, so we will return from run_term normally, uninstall the trap and never clean up. In fact there's no reason to uninstall the trap at all, it works just as well on the success exit path as an error exit path. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Remove unused variable FFMPEG_PID_FILEDavid Gibson2022-09-131-1/+0
| | | | | | FFPMPEG_PID_FILE is set (creating a temporary file), then never used. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Group tests by mode then protocol, rather than the reverseDavid Gibson2022-09-1314-32/+32
| | | | | | | | For example, passt/dhcp rather than dhcp/passt. This is more consistent with the two_guests and other test groups, and makes some other cleanups simpler. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Use new-style command issue for passt_in_ns testsDavid Gibson2022-09-135-52/+37
| | | | | | | Put the pieces together to use the new style context based dispatch for the passt_in_pasta tests. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Use context system for two_guests testsDavid Gibson2022-09-132-73/+57
| | | | | | | | Now that we have all the pieces we need for issuing commands both into namespaces and into guests, we can use those to convert the two_guests to using only the new style context command issue. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Use context system for guest commandsDavid Gibson2022-09-1310-16/+90
| | | | | | | | | | | | | | | Extends the context system in the test scripts to allow executing commands within a guest. Do this without requiring an existing network in the guest by using socat to run ssh via a vsock connection. We do need some additional "sleep"s in the tests, because the new faster dispatch means that sometimes we attempt to connect before socat has managed to listen. For now, only use this for the plain "passt" tests. The "passt_in_ns" and other tests have additional complications we still need to deal with. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Extend context system to run commands in namespace for pasta testsDavid Gibson2022-09-133-13/+29
| | | | | | | Extend the context system to allow commands to be run in a namespace created with unshare, and use it for the namespace used in the pasta tests. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Add nsholder utilityDavid Gibson2022-09-133-1/+147
| | | | | | | | | | | | | | | | | | | | | | | | | | | In our test scripts we need to do some ugly parsing of /proc and/or pstree output in order to get the PIDs of processes running in namespaces so that we can connect to those namespaces with nsenter or pasta. This is actually a pretty tricky problem with standard tools. To determine the PID from the outside of the namespace we need to know how the process of interest is related to the unshare or pasta process (child? one of several children? grandchild?) as well as then parsing /proc or ps output. This is slightly awkward now, and will get worse with future changes I'd like to make to have processes are dispatched. The obvious solution would be to have the process of interest (which we control) report its own PID, but that doesn't work easily, because it is in a PID namepace and sees only its local PID not the global PID we need to address it from outside. To handle this, add a small custom tool, "nsholder". This takes a path and a mode parameter. In "hold" mode it will create a unix domain socket bound to the path and listening. In "pid" mode it will get the "hold"ing process's pid via the unix socket using SO_PEERCRED, which translates between PID namespaces. In "stop" mode it will send a message to the socket causing the "hold"ing process to clean up and exit. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Use new-style contexts for passt pane in the pasta and passt testsDavid Gibson2022-09-133-19/+12
| | | | | | | | | | Convert the pasta and passt tests to use new-style context execution for the things that run in the "passt" frame. Don't touch the passt_in_ns or two_guests tests yet, because they run passt inside a namespace which introduces some additional complications we have yet to handle. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Issue host commands via context for most testsDavid Gibson2022-09-132-25/+42
| | | | | | | | | Convert most of the tests to use the new-style system for issuing commands for all host commands. We leave the distro tests for now: they use the same pane for both host and guest commands which we'll need some more things to deal with. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Integration of old-style pane execution and new context executionDavid Gibson2022-09-133-81/+121
| | | | | | | | | | | | | | | | We're creating a system for tests to more reliably execute commands in various contexts (e.g. host, guest, namespace). That transition is going to happen over a number of steps though, so in the meantime we need to deal with both the old-style issuing of commands via typing into and screen scraping tmux panels, and the new-style system for executing commands in context. Introduce some transitional helpers which will issue a command via context if the requested context is initialized, but will otherwise fall back to the old style tmux panel based method. Re-implement the various test DSL commands in terms of these new helpers. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Allow a tmux pane to watch commands executed in contextsDavid Gibson2022-09-131-0/+18
| | | | | | | | | | | | | | | | We're moving to a new way of the tests dispatching commands to running in contexts (host, guest, namespace, etc.). As we make this transition, though, we still want the user to be able to watch the commands running in a context, as they previously could from the commands issued in the pane. Add a helper to set up a pane to watch a context's log to allow this. In some cases we currently issue commands from several different logical contexts in the same pane, so allow a pane to watch several contexts at once. Also use tail's --retry option to allow starting the watch before we've initialized the context which will be useful in some cases. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Context execution helpersDavid Gibson2022-09-131-0/+80
| | | | | | | | | | | | | | | | | | For the tests, we need to run commands in various contexts: in the host, in a guest or in a namespace. Currently we do this by running each context in a tmux pane, and using tmux commands to type the commands into the relevant pane, then screen-scrape the output for the results if we need them. This is very fragile, because we have to make various assumptions to parse the output. Those can break if a shell doesn't have the prompt we expect, if the tmux pane is too small or in various other conditions. This starts some library functions for a new "context" system, that provides a common way to invoke commands in a given context, in a way that properly preserves stdout, stderr and the process return code. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Correctly match "background" with "wait" commandsDavid Gibson2022-09-134-8/+6
| | | | | | | | | | | | Our test DSL has a number of paired commands to run something in the background in a pane, then later to wait for it to complete. However, in some of the tests we have these mismatched - starting a command in one pane, then waiting for it in another. We appear to get away with this for some reason, but it's not correct and future changes make it cause more problems. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Allow --userns when pasta spawns a commandDavid Gibson2022-09-132-7/+0
| | | | | | | | | | | | Currently --userns is only allowed when pasta is attaching to an existing netns or PID, and is prohibited when creating a new netns by spawning a command or shell. With the new handling of userns, this check isn't neccessary. I'm not sure if there's any use case for --userns with a spawned command, but it's strictly more flexible and requires zero extra code, so we might as well. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Handle userns isolation and dropping root at the same timeDavid Gibson2022-09-138-83/+77
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | passt/pasta can interact with user namespaces in a number of ways: 1) With --netns-only we'll remain in our original user namespace 2) With --userns or a PID option to pasta we'll join either the given user namespace or that of the PID 3) When pasta spawns a shell or command we'll start a new user namespace for the command and then join it 4) With passt we'll create a new user namespace when we sandbox() ourself However (3) and (4) turn out to have essentially the same effect. In both cases we create one new user namespace. The spawned command starts there, and passt/pasta itself will live there from sandbox() onwards. Because of this, we can simplify user namespace handling by moving the userns handling earlier, to the same point we drop root in the original namespace. Extend the drop_user() function to isolate_user() which does both. After switching UID and GID in the original userns, isolate_user() will either join or create the userns we require. When we spawn a command with pasta_start_ns()/pasta_setup_ns() we no longer need to create a userns, because we're already made one. sandbox() likewise no longer needs to create (or join) an userns because we're already in the one we need. We no longer need c->pasta_userns_fd, since the fd is only used locally in isolate_user(). Likewise we can replace c->netns_only with a local in conf(), since it's not used outside there. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Correctly handle --netns-only in pasta_start_ns()David Gibson2022-09-131-2/+2
| | | | | | | | | --netns-only is supposed to make pasta use only a network namespace, not a user namespace. However, pasta_start_ns() has this backwards, and if --netns-only is specified it creates a user namespace but *not* a network namespace. Correct this. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Clean up and rename conf_ns_open()David Gibson2022-09-133-71/+68
| | | | | | | | | | | | | | conf_ns_open() opens file descriptors for the namespaces pasta needs, but it doesnt really have anything to do with configuration any more. For better clarity, move it to pasta.c and rename it pasta_open_ns(). This makes the symmetry between it and pasta_start_ns() more clear, since these represent the two basic ways that pasta can operate, either attaching to an existing namespace/process or spawning a new one. Since its no longer validating options, the errors it could return shouldn't cause a usage message. Just exit directly with an error instead. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Consolidate validation of pasta namespace optionsDavid Gibson2022-09-131-41/+42
| | | | | | | | | | | | | | | | | | | | There are a number of different ways to specify namespaces for pasta to use. Some combinations are valid and some are not. Currently validation for these is spread across several places: conf_ns_pid() validates PID options specifically. Near its callsite in conf() several other checks are made. Some additional checks are made in conf_ns_open() and finally theres a check just before the call to pasta_start_ns(). This is quite hard to follow. Make it easier by putting all the validation logic together in a new conf_pasta_ns() function, which subsumes conf_ns_pid(). This reveals that some of the checks were redundant with each other, so remove those. For good measure, rename conf_netns() to conf_netns_opt() to make it clearer its handling just the --netns option specifically, not overall configuration of the netns. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Move self-isolation code into a separate fileDavid Gibson2022-09-138-169/+189
| | | | | | | | passt/pasta contains a number of routines designed to isolate passt from the rest of the system for security. These are spread through util.c and passt.c. Move them together into a new isolation.c file. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Safer handling if we can't open /proc/self/uid_mapDavid Gibson2022-09-131-2/+6
| | | | | | | | | | | | | | | | | passt is allowed to run as "root" (UID 0) in a user namespace, but notas real root in the init namespace. We read /proc/self/uid_map to determine if we're in the init namespace or not. If we're unable to open /proc/self/uid_map we assume we're ok and continue running as UID 0. This seems unwise. The only instances I can think of where uid_map won't be available are if the host kernel doesn't support namespaces, or /proc is not mounted. In neither case is it safe to assume we're "not really" root and continue (although in practice we'd likely fail for other reasons pretty soon anyway). Therefore, fail with an error in this case, instead of carrying on. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Consolidate determination of UID/GID to run asDavid Gibson2022-09-133-59/+73
| | | | | | | | | | | | Currently the logic to work out what UID and GID we will run as is spread across conf(). If --runas is specified it's handled in conf_runas(), otherwise it's handled by check_root(), which depends on initialization of the uid and gid variables by either conf() itself or conf_runas(). Make this clearer by putting all the UID and GID logic into a single conf_ugid() function. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Split checking for root from dropping root privilegeDavid Gibson2022-09-134-7/+33
| | | | | | | | | | | | | | | | | | check_root() both checks to see if we are root (in the init namespace), and if we are drops to an unprivileged user. To make future cleanups simpler, split the checking for root (now in check_root()) from the actual dropping of privilege (now in drop_root()). Note that this does slightly alter semantics. Previously we would only setuid() if we were originally root (in the init namespace). Now we will always setuid() and setgid(), though it won't actually change anything if we weren't privileged to begin with. This also means that we will now always attempt to switch to the user specified with --runas, even if we aren't (init namespace) root to begin with. Obviously this will fail with an error if we weren't privileged to start with. --help and the man page are updated accordingly. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Don't store UID & GID persistently in the context structureDavid Gibson2022-09-134-15/+12
| | | | | | | | c->uid and c->gid are first set in conf(), and last used in check_root() itself called from conf(). Therefore these don't need to be fields in the long lived context structure and can instead be locals in conf(). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* fedora: Escape % characters in spec file's changelog2022_09_06.e2cae8fStefano Brivio2022-09-071-1/+1
| | | | | | ...rpmbuild otherwise expands valid macro names in changelog entries. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test: Rewrite test_iperf3David Gibson2022-09-074-44/+31
| | | | | | | | | | | | | | | test_iperf3() is a pretty inscrutable mess of nested background processes. It has a number of ugly sleeps needed to wait for things to complete. Rewrite it to be cleaner: * Use the construct (a & b & wait) to run 'a' and 'b' in parallel, but then wait for them both to complete before continuing * This allows us to wait for both the server and client to finish, rather than sleeping * Use jq to do all the math we need to get the final result, rather than jq followed by some complicated 'bc' mangling Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Parameterize run time for throughput performance testsDavid Gibson2022-09-075-87/+95
| | | | | | | | | | | | Currently all the throughput tests are run for 30s. This is reflected in both the actual parameters given to the iperf commands, but also in the matching sleeps in test_iperf3. Allow this to be adjusted more easily with a new parameter to test_iperf3. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [sbrivio: Reflect new parameter in comment to test_iperf3()] Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test: Combine iperf3c and iperf3s into a single DSL commandDavid Gibson2022-09-075-197/+122
| | | | | | | | | | | | | | | | | These two commands in the DSL to run an iperf client and server are always used together, and some of the parameters must match between them. The iperf3s must also be run more or less immediately after iperf3c, since iperf3c will run a client in the background after a sleep and requires a server to be running before it will work. A bunch of things can be made cleaner if we make a single DSL command that runs both sides of the test. For now make the combined command work exactly like the two commands together did, warts and all. This does lose the ability for the DSL scripts to give additional options to the iperf3 server, but we weren't using that anyway. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* gitignore pidfiles other than passt.pidDavid Gibson2022-09-071-1/+1
| | | | | | | | The tests now use a number of pidfiles for qemu and pasta as well as passt.pid. Broaden the .gitignore file so these aren't unintentially committed. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Honour LDFLAGS for binary targetsStefano Brivio2022-09-071-3/+3
| | | | | | | | | | | | | We don't set any, but we should use them if they are passed in the environment. On a Fedora Rawhide package build, annocheck (https://sourceware.org/annobin/) reports: Hardened: /usr/bin/passt: FAIL: bind-now test because not linked with -Wl,-z,now ...despite the build system exporting -Wl,-z,now in LDFLAGS. Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
* test: Wait for systemd-resolved to be ready on Ubuntu 22.04 for s390xStefano Brivio2022-09-051-2/+6
| | | | | | | | | | | | | | On new Ubuntu 22.04 images, stopping systemd-resolved to get the dhclient script override resolv.conf doesn't work anymore. I originally used that hack to avoid introducing a delay which is needed when running it on TCG. Keep systemd-resolved running instead, and wait for it to be ready by retrying to resolve a domain a few times before installing packages, so that we don't add another ugly delay that might unnecessarily slow down things even further. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* fedora: Add selinux-policy Requires: tag2022_09_01.7ce9fd1Stefano Brivio2022-09-021-2/+5
| | | | | | | | | | | | | | | | fedora-review says: Note: Directories without known owners: /usr/share/selinux/packages/passt, /usr/share/doc/passt, /usr/share/selinux, /usr/share/selinux/packages and selinux-policy owns those two last ones. While at it, split Requires: tags also for post and preun actions onto different lines, for consistency. Reported-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* fedora: Add %dir entries for own SELinux policy directory and documentationStefano Brivio2022-09-021-3/+5
| | | | | | | | | | | | | fedora-review says: Note: No known owner of /usr/share/selinux/packages/passt, /usr/share/doc/passt While at it, replace "passt" by "%{name}" in a few places for consistency. Reported-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* conf: Fix getopt_long() optstring for current semantics of -D, -S, -pStefano Brivio2022-09-021-2/+2
| | | | | | | | | | | | | Declaring them as required_argument in the longopts array specifies validation, but doesn't affect how optind is increased after parsing their values. Currently, passing one of these options as last option causes pasta to handle their own values as path to a binary to execute. Fixes: aae2a9bbf7d1 ("conf: Use "-D none" and "-S none" instead of missing empty option arguments") Fixes: bf95322fc1ef ("conf: Make the argument to --pcap option mandatory") Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test/README: Requirements for socket buffer sizes and hardware performance ↵Stefano Brivio2022-09-021-0/+16
| | | | | | | | | | | | | | | events Performance tests use iperf3(1) with large windows, and these sysctl entries are needed to run them unmodified. The passt demo uses perf(1) to report syscall overhead, and that needs access to hardware performance counters for unprivileged users. Reported-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
* podman, slirp4netns.sh: Use --netns option on pasta's command line2022_08_29.0cb795eStefano Brivio2022-08-302-4/+4
| | | | | | | | | | ...instead of PATH. This seems to be the only change needed in existing pasta integrations after patch: Use explicit --netns option rather than multiplexing with PID Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
* contrib: Rebase Podman patch to latest upstreamStefano Brivio2022-08-301-47/+47
| | | | | | Trivial conflicts in man pages only. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Allow pasta to take a command to executeDavid Gibson2022-08-304-25/+51
| | | | | | | | | | | | | | When not given an existing PID or network namspace to attach to, pasta spawns a shell. Most commands which can spawn a shell in an altered environment can also run other commands in that same environment, which can be useful in automation. Allow pasta to do the same thing; it can be given an arbitrary command to run in the network and user namespace which pasta creates. If neither a command nor an existing PID or netns to attach to is given, continue to spawn a default shell, as before. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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