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* tests: Don't globally set tmux default-shellDavid Gibson2022-05-191-6/+7
| | | | | | | | | | | | | | | | | run_term() uses tmux set-option -g to globally set the default shell. Unfortunately this hits a chicken-and-egg problem that's common with many of tmux's session options. If there isn't already a tmux server running, we can't connect to set the option. If we attempt this after starting our session (and therefore the server), then the session will already be started with the previous default shell. In any case it's not a good idea to set tmux global options, since that might interfere with whatever else the user is doing in tmux. So, instead set the default-shell option locally to the session after starting it. To make sure we get the right shell for our initial script, explicitly invoke /bin/sh to interpret it. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Don't use tmux update-environmentDavid Gibson2022-05-191-4/+5
| | | | | | | | | | | | | | | | | The semantics of tmux's update-environment option are a bit confusing. It says it means the given variables are copied into the session environment from the source environment, but it's not entirely clear what the "source" environment means. From my experimentation it appeast to be the environment from which the tmux *server* is launched, not the one issuing the 'new-session' command. That makes it pretty much useles, certainly in our case where we have no way of knowing if the user has pre-existing tmux sessions. Instead use the new-session -e option to explicitly pass in the variables we want to propagate. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Add some debugging output for the test scripts themselvesDavid Gibson2022-05-191-0/+2
| | | | | | | | | | | | The DEBUG option for tests/run enables debugging options to passt/pasta, however that doesn't help with debugging the test scripts themselves, which are fairly fragile. Extend the DEBUG option so it also prints information on each command in the test scripts to make it easier to work out where things are falling over. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Remove unused XVFB variableDavid Gibson2022-05-191-3/+0
| | | | | | | The XVFB variable is initialized at the beginning of test/run then never used again. I'm assuming it's a leftover from some ealier iteration. Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* tests: Update mbuto git URLsStefano Brivio2022-05-192-2/+2
| | | | | | The project is now at mbuto.sh, and git transport is enabled. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Add basic .gitignore filesDavid Gibson2022-05-192-0/+10
| | | | | | | Ignore various files generated during build or test. Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
* qrap.1: Clarify it takes a qemu command, not a pathStefano Brivio2022-05-191-3/+3
| | | | | Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* demo: podman: New port forwarding behaviour for pasta, minor fixesStefano Brivio2022-05-021-78/+56
| | | | | | | | | | | | Reflect the recent changes in the Podman adaptation (no port forwarding by default). It turns out that by running two iperf3 processes, sometimes slirp4netns blocks the second connection until the first test is done, thus doubling the throughput. Use a single process for slirp4netns with slirp4netns port handling. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* contrib: podman: Add bound address configuration, update port specificationsStefano Brivio2022-05-021-101/+168
| | | | | | | | | | | | | | | | | | Rebase the patch for Podman on top of current upstream, and: - add support for configuration of specific addresses for forwarded ports - by default, disable port forwarding, and reflect this in the man page changes - adjust processing to a new, incompatible format for port storage, which I couldn't actually track down to a specific commit, but that resulted in https://github.com/containers/podman/issues/13643 and commit eedaaf33cdbf ("fix slirp4netns port forwarding with ranges") Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* netlink: In nl_addr() and nl_route(), don't return before set requestStefano Brivio2022-05-011-2/+2
| | | | | Fixes: 22ed4467a413 ("treewide: Unchecked return value from library, CWE-252") Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* conf, tcp, udp: Allow address specification for forwarded portsStefano Brivio2022-05-0110-156/+274
| | | | | | | | | | | | | This feature is available in slirp4netns but was missing in passt and pasta. Given that we don't do dynamic memory allocation, we need to bind sockets while parsing port configuration. This means we need to process all other options first, as they might affect addressing and IP version support. It also implies a minor rework of how TCP and UDP implementations bind sockets. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tcp_splice: Allow up to 8 MiB as pipe sizeStefano Brivio2022-04-071-1/+1
| | | | | | It actually improves throughput a bit, if allowed by user limits. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test/lib: Add small delay before trying to parse outputStefano Brivio2022-04-071-0/+1
| | | | | | | Don't fetch the log too early, we might get output from previous commands. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test/distro: Set unprivileged_userns_clone on Debian Buster and earlierStefano Brivio2022-04-071-0/+4
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* test/lib: Consistent cols, rows, poster attributes for asciinema playerStefano Brivio2022-04-072-2/+2
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* arch: Pointer to local outside scope, CWE-562Stefano Brivio2022-04-071-5/+5
| | | | | | | | | Reported by Coverity: if we fail to run the AVX2 version, once execve() fails, we had already replaced argv[0] with the new stack-allocated path string, and that's then passed back to main(). Use a static variable instead. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* udp: Out-of-bounds read, CWE-125 in udp_timer()Stefano Brivio2022-04-071-1/+1
| | | | | | | Not an actual issue due to how it's typically stored, but udp_act can also be used for ports 65528-65535. Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tcp: False "Out-of-bounds read" positive, CWE-125Stefano Brivio2022-04-071-1/+5
| | | | | | | Reported by Coverity: it doesn't see that tcp{4,6}_l2_buf_used are set to zero by tcp_l2_data_buf_flush(), repeat that explicitly here. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tcp, tcp_splice: False "Negative array index read" positives, CWE-129Stefano Brivio2022-04-072-12/+24
| | | | | | A flag or event bit is always set by callers. Reported by Coverity. Signed-by-off: Stefano Brivio <sbrivio@redhat.com>
* tcp_splice: Logically dead code, CWE-561Stefano Brivio2022-04-071-7/+1
| | | | | | Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tcp: Dereference null return value, CWE-476Stefano Brivio2022-04-071-1/+1
| | | | | | Not an issue with a sane kernel behaviour. Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* conf, tap: False "Buffer not null terminated" positives, CWE-170Stefano Brivio2022-04-072-6/+6
| | | | | | | Those strings are actually guaranteed to be NULL-terminated. Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* conf: False "Assign instead of compare" positive, CWE-481Stefano Brivio2022-04-071-1/+1
| | | | | | | This really just needs to be an assignment before line_read() -- turn it into a for loop. Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* treewide: Argument cannot be negative, CWE-687Stefano Brivio2022-04-074-22/+30
| | | | | | Actually harmless. Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* passt: Improper use of negative value (CWE-394)Stefano Brivio2022-04-071-5/+14
| | | | | | Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* conf, packet: Operands don't affect result, CWE-569Stefano Brivio2022-04-072-3/+8
| | | | | | Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tap: Resource leak, CWE-404Stefano Brivio2022-04-071-1/+4
| | | | | | Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* treewide: Unchecked return value from library, CWE-252Stefano Brivio2022-04-078-55/+116
| | | | | | | All instances were harmless, but it might be useful to have some debug messages here and there. Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tcp: False "Untrusted loop bound" positive, CWE-606Stefano Brivio2022-04-051-0/+2
| | | | | | | | Field doff in struct tcp_hdr is 4 bits wide, so optlen in tcp_tap_handler() is already bound, but make that explicit. Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* passt: Ignoring number of bytes read, CWE-252Stefano Brivio2022-04-051-2/+3
| | | | | | Harmless, assuming sane kernel behaviour. Reported by Coverity. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* treewide: Invalid type in argument to printf format specifier, CWE-686Stefano Brivio2022-04-054-32/+32
| | | | | | Harmless except for two bad debugging prints. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* passt.1, qrap.1: Update links to qemu out-of-tree patchStefano Brivio2022-04-012-2/+2
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* README: Fix link to contrib/debianStefano Brivio2022-03-301-1/+1
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* hooks: Copy .webp diagram versions tooStefano Brivio2022-03-301-0/+1
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* README: Drop red notice about early development phaseStefano Brivio2022-03-301-3/+1
| | | | | | Last famous words: it should be tested enough by now. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* contrib: Add example of Debian package filesStefano Brivio2022-03-307-1/+66
| | | | | | | ...using dh_apparmor to ship and apply AppArmor profiles. Tried on current Debian testing (Bookworm, 12). Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* contrib: Add example spec file for FedoraStefano Brivio2022-03-301-0/+95
| | | | | | | ...with SELinux package, too. Tested on Fedora 35, but it should work on pretty much any version. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tap: Re-read from tap in tap_handler_pasta() on buffer fullStefano Brivio2022-03-301-2/+9
| | | | | | | | read() will return zero if we pass a zero length, which makes no sense: instead, track explicitly that we exhausted the buffer, flush packets to handlers and redo. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tap: Allow ioctl() and openat() for tap_ns_tun() re-initialisationStefano Brivio2022-03-302-1/+3
| | | | | | | If the tun interface disappears, we'll call tap_ns_tun() after the seccomp profile is applied: add ioctl() and openat() to it. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tap, tcp, udp, icmp: Cut down on some oversized buffersStefano Brivio2022-03-296-31/+72
| | | | | | | | | The existing sizes provide no measurable differences in throughput and packet rates at this point. They were probably needed as batched implementations were not complete, but they can be decreased quite a bit now. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* passt, pasta: Add examples of SELinux policy modulesStefano Brivio2022-03-297-0/+364
| | | | | | These should cover any reasonably common use case in distributions. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* passt, pasta: Add examples of AppArmor policiesStefano Brivio2022-03-292-0/+125
| | | | | | These should cover any reasonably common use case in distributions. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* tcp: Fix warning by gcc 5.4 on ppc64le about comparison in CONN_OR_NULL()Stefano Brivio2022-03-291-13/+13
| | | | | | | ...we don't really need two extra bits, but it's easier to organise things differently than to silence this. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* passt: Accurate error reporting for sandbox()Stefano Brivio2022-03-291-10/+26
| | | | | | | It's actually quite easy to make it fail depending on the environment, accurately report errors here. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Makefile: Allow implicit test for bugprone-suspicious-string-compare checkerStefano Brivio2022-03-291-4/+1
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* treewide: Fix android-cloexec-* clang-tidy warnings, re-enable checksStefano Brivio2022-03-298-31/+30
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* udp: Move flags before ts in struct udp_tap_port, avoid end paddingStefano Brivio2022-03-291-3/+3
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* treewide: Mark constant references as constStefano Brivio2022-03-2929-168/+192
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* treewide: Add include guardsStefano Brivio2022-03-2915-0/+75
| | | | | | | ...at the moment, just for consistency with packet.h, icmp.h, tcp.h and udp.h. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* treewide: Packet abstraction with mandatory boundary checksStefano Brivio2022-03-2923-700/+999
| | | | | | | | | | | | | | | | | | | | Implement a packet abstraction providing boundary and size checks based on packet descriptors: packets stored in a buffer can be queued into a pool (without storage of its own), and data can be retrieved referring to an index in the pool, specifying offset and length. Checks ensure data is not read outside the boundaries of buffer and descriptors, and that packets added to a pool are within the buffer range with valid offset and indices. This implies a wider rework: usage of the "queueing" part of the abstraction mostly affects tap_handler_{passt,pasta}() functions and their callees, while the "fetching" part affects all the guest or tap facing implementations: TCP, UDP, ICMP, ARP, NDP, DHCP and DHCPv6 handlers. Suggested-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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