Tarantool binary protocol support

[0x501D]

Added Tarantool binary protocol parsing (IPROTO).

Protocol info From IANA database:
Service Name: tarantool
Port Number: 3301
Transport Protocol: tcp/udp
Description: Tarantool in-memory computing platform

[guyharris]

This isn't compiling with Visual Studio 2015; does it require a later version of Visual Studio?

[0x501D]

This isn't compiling with Visual Studio 2015; does it require a later version of Visual Studio?

Should not require, I'm now dealing with all the fails.

[0x501D]

This isn't compiling with Visual Studio 2015; does it require a later version of Visual Studio?

Yes, MSVC 2015 is too old to compile the msgpuck library. Is this a critical issue?
I can make support for the tarantool protocol as a feature and link to msgpuck, but this library is not widely distributed across Linux distributions and other operating systems. That's why I wanted to include the library in tcpdump

[fxlb]

Yes, MSVC 2015 is too old to compile the msgpuck library. Is this a critical issue?

Can you explain what the problems are with this version?

[0x501D]

MSVC 2015

Yes, MSVC 2015 is too old to compile the msgpuck library. Is this a critical issue?

Can you explain what the problems are with this version?

Unfortunately, I don't have an operating system where I can debug a build with MSVC. I need more time to understand what the problem is in the blind.

[fxlb]

(Because MSVC 2015 is able to build tcpdump since 2018.)

[fxlb]

Please avoid non ASCII code and output:

$ git show|grep -P '[\x7F-\xFF]' 
+#define __STDC_CONSTANT_MACROS 1 /* make С++ to be happy */
+#define __STDC_LIMIT_MACROS 1    /* make С++ to be happy */
+TUPLE: ["chap-sha1", "Ë\u0001\u0001È\"Fêèu\u0011)-}À»\u001bà"]
+TUPLE: ["chap-sha1", "Ë\u0001\u0001È\"Fêèu\u0011)-}À»\u001bà"]
+body: {35: "replicator", 33: ["chap-sha1", "Ë\u0001\u0001È\"Fêèu\u0011)-}À»\u001bà"]}

[fxlb]

but this library is not widely distributed across Linux distributions and other operating systems

Are you sure?
https://repology.org/project/msgpuck/packages

[fxlb]

Or another library?

[0x501D]

Or another library?

Apparently the library is already quite well distributed, I will remake the PR to an external dependency.

Though I don’t really understand how to be then with CI and a new dependency. All tests will definitely fail.

[fxlb]

Though I don’t really understand how to be then with CI and a new dependency. All tests will definitely fail.

There can be conditional tests. See e.g. tests/crypto.tests.

[0x501D]

Please avoid non ASCII code and output:

$ git show|grep -P '[\x7F-\xFF]' 
+#define __STDC_CONSTANT_MACROS 1 /* make С++ to be happy */
+#define __STDC_LIMIT_MACROS 1    /* make С++ to be happy */
+TUPLE: ["chap-sha1", "Ë\u0001\u0001È\"Fêèu\u0011)-}À»\u001bà"]
+TUPLE: ["chap-sha1", "Ë\u0001\u0001È\"Fêèu\u0011)-}À»\u001bà"]
+body: {35: "replicator", 33: ["chap-sha1", "Ë\u0001\u0001È\"Fêèu\u0011)-}À»\u001bà"]}

Fixed. Added base64 encoding of binary data to the msgpuck library.

[0x501D]

This isn't compiling with Visual Studio 2015; does it require a later version of Visual Studio?

Fixed. The msgpuck library contained a bug in the code that caused it to fail to build on MSVC.

[0x501D]

@fxlb, Is there anything else I need to fix?

[fxlb]

Apparently the library is already quite well distributed, I will remake the PR to an external dependency.

I don't see the update. Do you have pushed it?

Another important point:
Your code give many problems like SEGV, heap-buffer-overflow, heap-use-after-free, etc. when fuzzing.
One of the reasons is that you don't use GET_*() or ND_TCHECK_*() macros.
See CONTRIBUTING.md, particularly part "Code style and generic remarks" items 5. and 6.

[0x501D]

I don't see the update. Do you have pushed it?

Thanks for the answer. I had to leave the built-in version of msgpuck since upstream prints binary data as is. In the built-in version, I fixed it:

// Fixed. Added base64 encoding of binary data to the msgpuck library.

With regards to the rest - proceeded to correct.

[fxlb]

It's not the goal of tcpdump to add/maintain the source code of an external library.
Thus in this PR msgpuck.c, msgpuck.h and msgpuck_hints.c should be removed.

For libmsgpuck-dev, it's like libsmi2-dev in tcpdump. we need to link to it and use it if the configure/cmake finds it.

The Tarantool dissector will be present if libmsgpuck-dev will be found on the system where the build is being done.

[0x501D]

It's not the goal of tcpdump to add/maintain the source code of an external library. Thus in this PR msgpuck.c, msgpuck.h and msgpuck_hints.c should be removed.

For libmsgpuck-dev, it's like libsmi2-dev in tcpdump. we need to link to it and use it if the configure/cmake finds it.

The Tarantool dissector will be present if libmsgpuck-dev will be found on the system where the build is being done.

Understood. I will remove msgpuck from the tcpdump source code and provide a workaround to print binary data.

[0x501D]

Hello, pull request updated:

• msgpuck is added as an external dependency.
• Added validation of the iproto protocol. The check from the library is used. mp_check_* functions.
• Added correct handling of multiple iproto messages within one packet.
• Added a test to check the correctness of parsing truncated packets.

[0x501D]

Something wrong with linux-amd64 test workflow. It fails with Timed out error.
@fxlb can you tell me if this is a PR or CI problem?

Update: problem with CI is gone.