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path: root/cooker/parse.c
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* seitan: Add netlink, sendto()/sendmsg(), iovec handling, demo with routesStefano Brivio2023-12-211-2/+4
| | | | | | | A bit rough at the moment, but it does the trick. Bonus: setsockopt() (with magic values only, not used in any demo yet). Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker: fix tag check with the new formatAlice Frosi2023-09-041-7/+31
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* cooker: fix initialization and variable typeAlice Frosi2023-06-141-5/+5
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* cooker: Fix up debugging messages for "return"Stefano Brivio2023-06-141-15/+35
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker/parse: Error out on 'continue' with value/error tagStefano Brivio2023-06-141-4/+4
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker: Support for read(), OP_STORE, field-based filtersStefano Brivio2023-06-141-7/+34
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker: Full support for flags and masks, assorted fixesStefano Brivio2023-06-081-0/+60
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* seitan, cooker: refactor op_returnAlice Frosi2023-06-071-7/+27
| | | | | | | Refactor OP_RETURN: - merged OP_BLOCK and OP_CONT into OP_RETURN - add desc field for op_return - updated the demo files
* cooker: add emit_endAlice Frosi2023-06-051-1/+1
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* cooker: Generic attributes and ATTR_SIZEStefano Brivio2023-06-041-1/+15
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* treewide: Change to GPLv2, add LICENSES, missing headersStefano Brivio2023-06-041-1/+1
| | | | | | As discussed with Alice -- 'reuse lint' passes now. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker: json_object_get_boolean() can return true for missing keyStefano Brivio2023-06-021-2/+2
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker, seitan: OP_FDStefano Brivio2023-06-021-4/+46
| | | | Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker: OP_CALL and OP_COPY stuffStefano Brivio2023-06-011-9/+83
| | | | | | ...mostly. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker, seitan: simple working exampleAlice Frosi2023-05-171-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | parser: - add OP_BLOCK and OP_RETURN to the parser seitan: - fix op_cmp in seitan, it was jmp when comparison was true Working example: demo.json: [ { "match": [ /* qemu-pr-helper and similar */ { "connect": { "addr": { "family": "unix", "path": "/tmp/test.sock" } } } ], "return": 0 } ] Create gluten and the bpf filter: $ seitan-cooker demo.hjson demo.gluten demo.bpf Launch the seitan eater with the target program: $ seitan-eater -i demo.bpf -- strace -e connect tests-utils/test-syscalls connect Start seitan with gluten: $ seitan -i demo.gluten -p $(pgrep seitan-eater) Seitan mocks the connect syscall and `connect` returns successfully: $ seitan-eater -i demo.bpf -- strace -e connect tests-utils/test-syscalls connect Test syscall: connect connect(4, {sa_family=AF_UNIX, sun_path="/tmp/test.sock"}, 108) = 0
* cooker, seitan: Now with 100% more glutenStefano Brivio2023-05-161-225/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pseudorandom changes and progress around cooker and seitan: - cooker: - rename matching functions, split match.c - fix up SELECT semantics - add some form of handling for all syscalls in the example (some stubs) - OP_CMP for all basic and compound types except for flags - link jumps to next block and next match - completed implementation of tags - gluten write - filter clean-ups, write filters (probably not working) - seitan: - load gluten and source instructions and data from there $ ./seitan-cooker cooker/example.hjson example.gluten example.bpf Parsing block 0 Parsing match 0: connect Found description for connect 0: OP_NR: if syscall number is not 0, jump to next block Parsing match argument fd setting tag reference 'fd' tag 'fd' now refers to seccomp data at 0 Parsing match argument addr allocating 128 at offset 0 1: OP_LOAD: #0 < args[1] (size: 128) C#0: (INT) 1 2: OP_CMP: if temporary data: #0 NE (size: 4) read-only data: #0, jump to next block C#4: (STRING:24) /var/run/pr-helper.sock 3: OP_CMP: if temporary data: #0 NE (size: 24) read-only data: #4, jump to next block Linking match... Linking block... linked jump of instruction #0 to #4 linked jump of instruction #2 to #4 linked jump of instruction #3 to #4 Parsing block 1 Parsing match 0: ioctl Found description for ioctl 4: OP_NR: if syscall number is not 112, jump to next block Parsing match argument path Parsing match argument request C#28: (INT) 1074025674 5: OP_CMP: if seccomp data: #1 NE (size: 4) read-only data: #28, jump to next block Parsing match argument ifr allocating 40 at offset 128 6: OP_LOAD: #128 < args[2] (size: 40) C#32: (STRING:5) tap0 7: OP_CMP: if temporary data: #128 NE (size: 5) read-only data: #32, jump to next block C#37: (INT) 1 8: OP_CMP: if temporary data: #128 NE (size: 4) read-only data: #37, jump to next block Linking match... Linking block... linked jump of instruction #4 to #9 linked jump of instruction #5 to #9 linked jump of instruction #7 to #9 linked jump of instruction #8 to #9 Parsing block 2 Parsing match 0: unshare Found description for unshare 9: OP_NR: if syscall number is not 164, jump to next block Parsing match argument flags Linking match... Linking block... linked jump of instruction #9 to #10 Parsing block 3 Parsing match 0: unshare Found description for unshare 10: OP_NR: if syscall number is not 164, jump to next block Parsing match argument flags Linking match... Linking block... linked jump of instruction #10 to #11 Parsing block 4 Parsing match 0: mknod Found description for mknod 11: OP_NR: if syscall number is not 164, jump to next block Parsing match argument path allocating 1 at offset 168 12: OP_LOAD: #168 < args[0] (size: 1) setting tag reference 'path' tag 'path' now refers to temporary data at 168 Parsing match argument mode Parsing match argument major Parsing match argument minor setting tag reference 'minor' tag 'minor' now refers to seccomp data at 2 Linking match... Linking block... linked jump of instruction #11 to #13 Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* cooker updates spilling all over the placeStefano Brivio2023-05-021-13/+87
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Only tangentially related: - make seitan C99 again, so that I can build cooker without warnings - make Makefiles make use of the usual conventions about assigning directory paths in variables, drop numbers.h as requirement for cooker and make it convenient to run stand-alone Makefiles - fix up nr_syscalls.sh to be POSIX, otherwise it will give syntax errors on my system - define a single, common way to refer to offsets in gluten, and functions to use those offsets in a safe way. Immediates are gone: cooker will write any bit of "data" to the read-only section - call const what has to be const - define on-disk layout for gluten - add OP_NR (to check syscall numbers), rename OP_COPY_ARGS to OP_LOAD (it loads _selected_ stuff from arguments) As for cooker itself: - drop ARG_ and arg_ prefixes from struct names, and similar - add/rework functions to build OP_NR, OP_LOAD, OP_CMP, and to write constant data to gluten - add parsing for "compound" arguments, but that's not completely hooked into evaluation for numeric arguments yet Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
* Rename cooker and eater with seitan prefixAlice Frosi2023-03-281-0/+237
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* Re-organize project and add license headerAlice Frosi2023-03-241-237/+0
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* cooker: Initial import of new implementationStefano Brivio2023-03-201-0/+237
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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