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* test: Actually use pasta in Podman demo step with HTTP serviceStefano Brivio2022-07-221-1/+1
| | | | | | ...instead of slirp4netns. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test: Fix Podman build in Podman demoStefano Brivio2022-07-221-0/+2
| | | | | | | For some reason, I now have to update some "vendored" dependencies on a fresh git clone, at least in my environment, before building. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test: In pasta demo, issue /sbin/dhclient instead of dhclientStefano Brivio2022-07-221-2/+2
| | | | | | | | This was dependent on my own environment where I usually have /sbin in $PATH. If that's missing, given that we're running dhclient as user, we won't find it. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test: In demos, use pgrep instead of pstree to find namespace PIDStefano Brivio2022-07-222-8/+6
| | | | | | | | | | | | Parsing pstree's output is somewhat unreliable: there might be multiple pasta instances running on the same host, and depending on the overall output width pstree might truncate some branches. Ask pasta to save its PID to file, and use that as parameter for pgrep to find the PID of the interactive shell whose user and network namespaces we want to join. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test: In passt demo, bring up eth0 in guest, not in namespace paneStefano Brivio2022-07-211-1/+1
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* contrib: Rebase Podman patch to latest upstreamStefano Brivio2022-07-211-50/+41
| | | | | | A few trivial conflicts came up. No semantic changes. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* qrap: Add a neighbour solicitation to probe frames, instead of just ARP2022_07_20.9af2e5dStefano Brivio2022-07-201-4/+32
| | | | | | | | | | | | | | | | For a while now, passt disables ARP functionality completely if IPv4 is disabled. If qrap sends an ARP request as a probe in that case, it will receive no answer and move on, trying to find another instance. Add a second probe frame, a hardcoded neighbour solicitation, so that we get a neighbour advertisement if IPv6 is enabled. Without this change, IPv6-only operation is completely broken. Reported-by: Wenli Quan <wquan@redhat.com> Reported-by: Alona Paz <alkaplan@redhat.com> Link: https://bugzilla.redhat.com/show_bug.cgi?id=2106257 Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* conf: Reset range endpoints after parsing one excluded port specifier2022_07_14.b86cd00Stefano Brivio2022-07-141-0/+1
| | | | | | | | | I forgot to reset the range endpoints after parsing an item of the comma-separated list in commit 220759efb89a ("conf: Allow to specify ranges and ports excluded from given ranges") -- fix that. Fixes: 220759efb89a ("conf: Allow to specify ranges and ports excluded from given ranges") Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* demo/passt: Bring interface up before starting dhclient in guestStefano Brivio2022-07-141-0/+2
| | | | | | ...I forgot about one occurrence of this. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* conf: Allow to specify ranges and ports excluded from given rangesStefano Brivio2022-07-142-13/+127
| | | | | | | | | | | | | | | | | | | | | This is useful in environments where we want to forward a large number of ports, or all non-ephemeral ones, and some other service running on the host needs a few selected ports. I'm using ~ as prefix for the specification of excluded ranges and ports to avoid the need for explicit command line quoting. Ranges and ports can be excluded from given ranges by adding them in the comma-separated list, prefixed by ~. Some quick examples: -t 5000-6000,~5555: forward ports 5000 to 6000, but not 5555 -t ~20000-20010: forward all non-ephemeral, allowed ports, except for ports 20000 to 20010 ...more details in usage message and man page. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* conf: Fix initialisation of IPv6 unicast and link-local addressesStefano Brivio2022-07-141-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | In commit 675174d4ba25 ("conf, tap: Split netlink and pasta functions, allow interface configuration"), I broke the initial setting of the observed IPv6 addresses in two ways: - the size copied from the configured addresses corresponds to an IPv4 address, not to an IPv6 address - the observed link-local address is initialised to the configured unicast address, not the link-local one If we haven't seen the guest using some type of addresses yet, we should default to the configured values, hence these initial settings: fix both. This resulted in UDP flows to the guest from a unique local address on the network not working before the guest shows passt a valid address itself, as reported by Alona. Reported-by: Alona Paz <alkaplan@redhat.com> Link: https://bugs.passt.top/show_bug.cgi?id=16 Fixes: 675174d4ba25 ("conf, tap: Split netlink and pasta functions, allow interface configuration") Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* util: Fix debug print on failed SO_REUSEADDR setting in sock_l4()Stefano Brivio2022-07-141-1/+1
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* passt: Allow exit_group() system call in seccomp profilesStefano Brivio2022-07-143-2/+4
| | | | | | | | | | | | We handle SIGQUIT and SIGTERM calling exit(), which is usually implemented with the exit_group() system call. If we don't allow exit_group(), we'll get a SIGSYS while handling SIGQUIT and SIGTERM, which means a misleading non-zero exit code. Reported-by: Wenli Quan <wquan@redhat.com> Link: https://bugzilla.redhat.com/show_bug.cgi?id=2101990 Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* arch, passt: Use executable link to form AVX2 binary pathStefano Brivio2022-07-142-13/+21
| | | | | | | | | | | | | | | | ...instead of argv[0], which might or might not contain a valid path to the executable itself. Instead of mangling argv[0], use the same link to find out if we're already running the AVX2 build where supported. Alternatively, we could use execvpe(), but that might result in running a different installed version, in case e.g. the set of binaries is present in both /usr/bin and /usr/local/bin, with both being in $PATH. Reported-by: Wenli Quan <wquan@redhat.com> Link: https://bugzilla.redhat.com/show_bug.cgi?id=2101310 Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tests: Remove unused DNS6 calculation from fedora testsDavid Gibson2022-07-143-4/+3
| | | | | | | | | | | | | | | | | | The Fedora test file extracts some information from the host resolv.conf into a DNS6 variable which is then never used. Remove this unnecessary step, which is presumably a leftover from an earlier iteration. This was the only user of 'head' and 'sed' in the test file, so those can also be removed from the required tools. The debian and ubuntu test files also listed 'head' and 'sed' as tools, although they don't use them, I'm guessing because of an earlier version which had the same DNS6 code. Remove those as well. The opensuse test file still actually uses DNS6, so leave it there for now. The DNS handling and network config handling for SuSE looks to be kind of broken, but fixing that is a job for another day. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Prepare distro images during asset build phaseDavid Gibson2022-07-146-325/+69
| | | | | | | | | | | | | | | | | | | | | | | Before booting the guest images, the distro test cases need to modify the guest images, using virt-edit and guestfish, to boot in the way we need. At present this gets repeated on every test run, even though it's not really doing anything we want to test for. In addition many of the images have the same preparation steps leading to a lot of duplicated stages in the tests. A number of additional images can be prepared using common steps, even if the ones used now have small differences. Therefore move the preparation of most of the guest images to the asset build phase, where they can be done a single time for multiple test runs, using a common preparation script. We can even avoid making a copy of the disk image for booting, by using qemu's -snapshot option. A few of the distros (openSUSE and older Ubuntu) do need different steps. For now we don't chage how they are run, they could possibly be handled more like this in future. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Move distro image download to asset build makefileDavid Gibson2022-07-146-46/+178
| | | | | | | | | | | | Rather than directly download distro images from the test scripts, handle all the downloads during the test asset build, then just clone them for the tests themselves. This avoids repeated downloads which can be very slow when debugging failing tests. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [sbrivio: Add OPENSUSE_IMGS to DOWNLOAD_ASSETS in Makefile, and note that xzcat doesn't take a -O option in test/distro/opensuse] Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tests: Explicitly list test files in test/run, remove "onlyfor" supportDavid Gibson2022-07-1423-67/+31
| | | | | | | | | | | | | | | | | Currently test/run uses wildcards to run all of the tests in a directory. However, that wildcard list is filtered down by the "onlyfor" directives in the test files... usually to a single file. Therefore, just explicitly list the files we *really* want to run for this test mode. This makes it easier to see at the top level what tests will be executed, and to change that list temporarily while debugging specific failures. This means the "onlyfor" directive no longer has any purpose, and we can remove it. "onlyfor" was also the only used of the $MODE variable, so we can remove that too. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Don't automatically traverse directories of test filesDavid Gibson2022-07-142-26/+26
| | | | | | | | | | | | | | | The top level listing control of which tests to run is in test/run, however it uses the test() function which runs an entire directory of test files, filtered by some criteria. This makes it awkward to narrow down to a subset of tests when debugging a specific failure. To make this easier, have test() take an explicit list of test files to run, and have the caller in test/run handle the directory traversal. The construct we use for this is pretty awkward to handle the fact that we're in the source tree root directory rather than test/ at this point in test/run. Later cleanups will improve that. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Remove not-very-useful "req" directiveDavid Gibson2022-07-143-53/+31
| | | | | | | | | | | | | | | | | The test scripts support a "req" directive which requires one test script to be run before another. It's implemented by doing a topological sort based on these directives in the runner scripts, which is about as awkward as you'd expect in Bourne shell. It turns out we only use this functionality in one place - to make the "make install" test run after the plain "make" test. We also already have a simpler way of making sure tests run in a specific order: just put them into the same test script file. So, remove support for the "req" directive and just fold the build/all and build/install test scripts together. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Remove unused set_mode() functionDavid Gibson2022-07-141-13/+0
| | | | | | This utility function is never called. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Clean up passt.pid fileDavid Gibson2022-07-142-1/+3
| | | | | | | | If the tests are interrupted at the right point a passt.pid file can be left over. Clean it up with "make clean" and add it to .gitignore so it doesn't get accidentally committed. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Search multiple places for aarch64 EDK2 bios imageDavid Gibson2022-07-146-13/+30
| | | | | | | | | | | | | | | | | Apparently qemu's ARM virt machine needs to be explicitly given a firmware image, rather than just supplying a sane default. Unfortunately the EDK2 firmware image we need isn't in the same place on all host distros. Currently the test scripts hardcode the Debian location, meaning it will break on hosts that have it somewhere else. This patch searches multiple locations for the firmware, and creates a local link during the asset build phase, which the tests can then use. For now it only searches the locations used by Debian and Fedora, but that's a small improvement in robustness already, and can be later improved further if we need to. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Move mbuto download and execution to asset buildDavid Gibson2022-07-143-19/+16
| | | | | | | | | | | | Move the download of mbuto and using it to create a sample initramfs to the asset build makefile, rather than embedding it in the test scripts themselves. The two_guests tests used to use two separate copies of the mbuto image. As an initramfs the mbuto image is strictly readonly though, so that's not necessary. So, also use the same image for both guests. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Introduce makefile for building test assetsDavid Gibson2022-07-142-1/+28
| | | | | | | | | | | | | | A number of passt/pasta testcases have initial steps which are just about building images or other assets we need for the test proper. Repeating these for each test run can be quite costly. This patch makes a start on moving this sort of test asset building to a separate phase before running the tests proper. For now just add a Makefile to handle the asset building (although it doesn't build anything yet), and make the path where we'll be building the assets available to the tests. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Invoke specific qemu-system-* binariesDavid Gibson2022-07-147-34/+43
| | | | | | | | | | | | | | | | | | | | | | A lot of tests and examples invoke qemu with the command "kvm". However, as far as I can tell, "kvm" being aliased to the appropriate qemu system binary is Debian specific. The binary names from qemu upstream - qemu-system-$ARCH - also aren't universal, but they are more common (they should be good for both Debian and Fedora at least). In order to still get KVM acceleration when available, we use the option "-M accel=kvm:tcg" to tell qemu to try using either KVM or TCG in that order A number of the places we invoked "kvm" are expecting specifically an x86 guest, and so it's also safer to explicitly invoke qemu-system-x86_64. Some others appear to be independent of the target arch (just wanting the same arch as the host to allow KVM acceleration). Although I suspect there may be more subtle x86 specific options in the qemu command lines, attempt to preserve arch independence by using $(uname -m). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: qemu-system-ppc64le isn't a thingDavid Gibson2022-07-142-6/+6
| | | | | | | | | | | | Several tests run pp64le guests using "qemu-system-ppc64le". But, at the system level there's no difference between ppc64 and ppc64le - it's the same hardware, just placed into different endian modes by OS early boot code. Reflecting that, qemu only supplies a single "qemu-system-ppc64". Some distros alias qemu-system-ppc64le to qemu-system-ppc64 (Debian does), but it's best not to count on this (Fedora doesn't, for example). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Handle the case of a DNS server on localhostDavid Gibson2022-07-141-0/+16
| | | | | | | | | | | | | | | | | | By default, passt detects the nameserver used by the host system by reading /etc/resolv.conf, and advertises that to the guest via DHCP. However this breaks down if the host's nameserver is local (on 127.0.0.1 or ::1); connecting to localhost on the guest won't reach the host's nameserver. Using a local nameserver is a reasonably common case when using dnsmasq or similar to merge name resolution on a home network with name resolution from an organization-private VPN. We already have the gateway mapping support to allow reaching host-local services from the guest via the address of the default gateway. Add code to detect the case of a local DNS server and use the gateway mapping to advertise it usefully to the guest. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Embed script for dhclient(8) in mbuto(1) profileStefano Brivio2022-07-144-10/+26
| | | | | | | | | | | | | | | | | | | | | | | | | David reports that dhclient-script(8) on Fedora needs a number of binaries that are not included in PROGS of the current mbuto profile, and we would also need to include hostnamectl(1) there, which will fail without a systemd init. Embed a minimal script for dhclient(8) in the profile itself, written to /sbin/dhclient-script at boot, to just check what we need to check out of DHCP and DHCPv6 functionality. While at it, drop busybox and logger from PROGS, as we don't need them, and add hostname(1). While DHCP option 12 isn't supported yet by the DHCP implementation in passt, we should probably add it soon. Note: owing to the simplicity of this script, we now need to bring up the interface before starting dhclient: add this in test scripts where it's not the case yet. Reported-by: David Gibson <david@gibson.dropbear.id.au> Suggested-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com> note that we need to bring up the interface before starting dhclient
* qrap: Don't rely on errno after perror(), and reset it before usageStefano Brivio2022-07-061-6/+13
| | | | | | | | | | | | | | | | | | In commit fca5e11773d0 ("qrap: Add probe retry on connection reset from passt for KubeVirt integration") I just used errno to check if the connection was reset on recv(), but perror() might set it to EINVAL if e.g. an underlying logging mechanism fails, so we won't actually catch the connection reset. And in case recv() returns 0, errno won't be set, but we're still using it without resetting it first, which leads to unpredictable results in that case. Reset errno before probing with connect(), send() and recv(), and save it for later checks before calling perror(). Fixes: fca5e11773d0 ("qrap: Add probe retry on connection reset from passt for KubeVirt integration") Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Remove unused line_read()David Gibson2022-07-061-54/+0
| | | | | | The old, ugly implementation of line_read() is no longer used. Remove it. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Use new lineread implementation for procfs_scan_listen()David Gibson2022-07-061-4/+6
| | | | | | | Use the new more solid implementation of line by line reading for procfs_scan_listen(). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Parse resolv.conf with new lineread implementationDavid Gibson2022-07-061-8/+14
| | | | | | | | | | | Switch the resolv.conf parsing in conf.c to use the new lineread implementation. This means that it can now handle a resolv.conf file which contains blank lines. There are quite a few other fragilities with the resolv.conf parsing, but that's out of scope for this patch. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Add cleaner line-by-line reading primitivesDavid Gibson2022-07-063-4/+150
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Two places in passt need to read files line by line (one parsing resolv.conf, the other parsing /proc/net/*. They can't use fgets() because in glibc that can allocate memory. Instead they use an implementation line_read() in util.c. This has some problems: * It has two completely separate modes of operation, one buffering and one not, the relation between these and how they're activated is subtle and confusing * At least in non-buffered mode, it will mishandle an empty line, folding them onto the start of the next non-empty line * In non-buffered mode it will use lseek() which prevents using this on non-regular files (we don't need that at present, but it's a surprising limitation) * It has a lot of difficult to read pointer mangling Add a new cleaner implementation of allocation-free line-by-line reading in lineread.c. This one always buffers, using a state structure to keep track of what we need. This is larger than I'd like, but it turns out handling all the edge cases of line-by-line reading in C is surprisingly hard. This just adds the code, subsequent patches will change the existing users of line_read() to the new implementation. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* test: Add external mbuto profile, drop udhcpc, and switch to itStefano Brivio2022-07-063-2/+39
| | | | | | | | | This depends on a future change in mbuto to accept external profile files. Add a file defining what we need for tests and demos, dropping udhcpc and script as they're not needed anymore, and switch to it. Suggested-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* qrap: Increase number of retries on connection reset even furtherStefano Brivio2022-06-271-1/+1
| | | | | | | | | ...if there are two or more instances of libvirt in a KubeVirt scenario using a number of instances of passt, the overlap period with probing instances of qemu becomes much longer. Switch to 50 retries instead of 5. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* qrap: Change number of retries and delay on connection resetStefano Brivio2022-06-271-6/+6
| | | | | | | | One retry after 100ms was enough for static builds, where qrap takes a while to start, but it's sometimes not enough with regular builds. Switch that to five retries with 50ms delay. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Don't create extraneous -.s fileDavid Gibson2022-06-181-1/+1
| | | | | | | | | | In order to probe availability of certain features the Makefile test compiles a handful of tiny snippets, feeding those in from stdin. However in one case - the one for -fstack-protector - it forgets to redirect the output to stdout, meaning it creates a stray '-.s' file when make is invoked (even make clean). Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Tweak $(RM) usageDavid Gibson2022-06-181-3/+3
| | | | | | | | | | | The use of rm commands in the clean and uninstall targets adds an explicit leading - to ignore errors. However the built-in RM variable in make is actually "rm -f" which already ignores errors, so the - isn't neccessary. Also replace ${RM} with $(RM) which is the more conventional form in Makefiles. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Simplify pasta* targets with a pattern ruleDavid Gibson2022-06-181-8/+2
| | | | | | | | pasta, pasta.avx2 and pasta.1 are all generated as a link to the corresponding passt file. We can consolidate the 3 rules for these targets into a single pattern rule. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Makefile: Use $(BIN) and $(MANPAGES) variable to simplify several targetsDavid Gibson2022-06-185-18/+16
| | | | | | | | | | | | | | There are several places which explicitly list the various generated binaries, even though a $(BIN) variable already lists them. There are several more places that list all the manpage files, introduce a $(MANPAGES) variable to remove that repetition as well. Tweak the generation of pasta.1 as a link to passt.1 so it's not just made as a side effect of the pasta target. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [sbrivio: add passt.1 and qrap.1 to guest files for distro tests] Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Avoid using wildcard sourcesDavid Gibson2022-06-182-17/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | The passt/pasta Makefile makes fairly heavy use of GNU make's $(wildcard) function to locate the sources and headers to build. Using wildcards for the things to compile is usually a bad idea though: if somehow you end up with a .c or .h file in your tree you didn't expect it can misbuild in an exceedingly confusing way. In particular this can sometimes happen if switching between releases / branches where files have been added or removed without 100% cleaning the tree. It also makes life a bit complicated if building multiple different binaries in the same tree: we already have some rather awkward $(filter-out) constructions to avoid including qrap.c in the passt build. Replace use of $(wildcard) with the more idiomatic approach of defining variables listing all the relevant source files then using that throughout. In the rule for seccomp.h there was also a bare "*.c" which caused make to always rebuild that target. Fix that as well. Similarly, seccomp.sh uses a wildcard to locate the sources, which is unwise for the same reasons. Make it take the sources to examine on the command line instead, and have the Makefile pass them in from the same variables. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* conf: In conf_runas(), on static builds, group information is also unusedStefano Brivio2022-06-181-0/+1
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tap: Add informational messages for UNIX domain socket connectionsStefano Brivio2022-06-181-0/+10
| | | | | | | | | ...namely, as connections are discarded or accepted. This was quite useful to debug an issue with libvirtd failing to start qemu (because passt refused the new connection) as a previous qemu instance was still active. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* qrap: Add probe retry on connection reset from passt for KubeVirt integrationStefano Brivio2022-06-181-1/+33
| | | | | | | | | | | | | | | | | | KubeVirt uses libvirt to start qrap in its current draft integration (https://github.com/kubevirt/kubevirt/pull/7849/), and libvirtd starts qrap three times every time a new virtual machine is created: once on domain creation, and twice on domain start (for "probing") and to finally start it for real. Very often, a subsequent invocation of qrap happen before the previously running instance of qemu terminates, which means that passt will refuse the new connection as the old one is still active. Introduce a single retry with a 100ms delay to work around this. This should be checked again once native libvirt support is there, and that point qrap will have no reason to exist anymore. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Suppress unusedStructMember Cppcheck warning in dhcp.cStefano Brivio2022-06-181-0/+2
| | | | | | | | | | | | | | | New from Cppcheck 2.8: all the fields of struct msg that are not directly manipulated are now reported as unused, which is kind of correct as those fields are used as a blob "copied" from request to response and not as separate fields. However, keeping the message composition explicit is probably desirable, and adding inline suppressions makes the whole thing rather unreadable, so just suppress unusedStructMember warnings for dhcp.c, while also adding a suppression for unmatched suppressions to keep earlier versions of Cppcheck happy. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tests: Use nmap-ncat instead of openbsd netcat for pasta testsDavid Gibson2022-06-184-47/+48
| | | | | | | | | | | | | | | | A number of the testcases use options specific the OpenBSD version of netcat. That's available in Debian, but not easily available in Fedora. Switch the pasta tests to using the nmap version of netcat (a.k.a. ncat). This is easily available in both Debian and Fedora, and appears to be a bit more modern and maintained as well. ncat generally requires explicit listen addresses (which is good for clarity anywhere). Its default options appear to remove the need for the -N and -q options. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> [sbrivio: changed one ncat listening address to IPv6 loopback] Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Use dhclient instead of udhcpcDavid Gibson2022-06-154-16/+8
| | | | | | | | | | | | For some reason, the passt/pasta tests and examples use dhclient for DHCPv6, but in most cases use udhcpc for DHCPv4. Change it to use dhclient for both DHCPv4 and DHCPv6. This means one less tool we need for testing, plus dhclient is easily available on Fedora whereas udhcpc is not. Note that the passt tests still rely on udhcpc indirectly because mbuto wants to put it into the guest images it generates. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Tweak dhclient arguments for readabilityDavid Gibson2022-06-1510-17/+17
| | | | | | | | | | | | | | A number of tests and examples use dhclient in both IPv4 and IPv6 modes. We use "dhclient -6" for IPv6, but usually just "dhclient" for IPv4. Add an explicit "-4" argument to make it more clear and explicit. In addition, when dhclient is run from within pasta it usually won't be "real" root, and so will not have access to write the default global pid file. This results in a mostly harmless but irritating error: Can't create /var/run/dhclient.pid: Permission denied We can avoid that by using the --no-pid flag to dhclient. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* Don't abbreviate ip(8) arguments in examples and testsDavid Gibson2022-06-1522-114/+114
| | | | | | | | ip(8)'s ability to take abbreviated arguments (e.g. "li sh" instead of "link show") is very handy when using it interactively, but it doesn't make for very readable scripts and examples when shown that way. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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