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PCAP文件NTP时间戳校准脚本生成 · ecnu-icalk | DecimalAI

devopsby ecnu-icalk

PCAP文件NTP时间戳校准脚本生成

ecnu-icalk/PCAP文件NTP时间戳校准脚本生成

Source ecnu-icalk/autoskill ↗License Not recorded

生成Python脚本，用于读取PCAP文件，基于NTP数据帧计算时间差值，并对文件内所有数据帧的时间戳进行全局校准后保存。

SkillScore100Maintained

Automatic

Coding pack

Last verified 8/18/2026

What it changes

Passed 22 of 22 test cases with the skill, and 19 of 22 without it.

Without skill86%

With skill100%

Checks it passed that the model alone missed

Uses rdpcap to read the input pcap file
Uses placeholder string input.pcap for the source pcap file
Uses placeholder string output.pcap for the destination pcap file

and 1 more in the full report

3 fixed19 passed either way0 still failing0 broke

Pass-rate lift: +14 pp
Tokens: +8%
Agent turns: 0%
Response time: -9%

Model gemini-3.6-flashMeasured 8/18/2026v122 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/ecnu-icalk-pcap-ntp-1c01f3/SKILL.md https://app.decimal.ai/s/ecnu-icalk-pcap-ntp/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add ecnu-icalk-pcap-ntp, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/ecnu-icalk-pcap-ntp-1c01f3/ and pins it in .decimal/skills.lock

decimalai skills add ecnu-icalk-pcap-ntp

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/ecnu-icalk-pcap-ntp-1c01f3/SKILL.md https://app.decimal.ai/s/ecnu-icalk-pcap-ntp/SKILL.md

Raw file: /s/ecnu-icalk-pcap-ntp/SKILL.md ↗ · machine-readable summary at /s/ecnu-icalk-pcap-ntp.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 3 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 3

Prompt

Write a complete Python script to adjust timestamps across a PCAP file using NTP packet references. Use clear placeholders for input and output paths.

What was checked, without and with the skill
Checked	Without skill	With skill
Uses placeholder string input.pcap for the source pcap file	Missed	Passed
Uses placeholder string output.pcap for the destination pcap file	Missed	Passed

case-07 · gemini-3.6-flash · 8/18/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md35 linessingle file

PCAP文件NTP时间戳校准脚本生成

生成Python脚本，用于读取PCAP文件，基于NTP数据帧计算时间差值，并对文件内所有数据帧的时间戳进行全局校准后保存。

Prompt

Role & Objective

你是一个Python网络脚本生成专家。你的任务是根据用户需求生成Python脚本，用于处理PCAP文件中的时间戳校准问题。

Operational Rules & Constraints

核心逻辑：脚本必须严格遵循以下处理流程：
- 读取输入的PCAP文件。
- 遍历数据包，寻找NTP（Network Time Protocol）数据帧。
- 提取NTP数据帧携带的时间信息（如接收时间戳 recv_timestamp）与数据帧本身的时间戳（packet.time）。
- 计算两者之间的时间差值（Delta = NTP时间 - 数据帧时间）。
- 将计算出的时间差值应用到PCAP文件内的所有数据帧的时间戳上（即 packet.time += Delta）。
- 将校准后的数据包保存到一个新的PCAP文件中。
技术栈：建议使用Scapy库（scapy.all）进行PCAP文件的读写和解析。
代码结构：代码应包含读取、计算差值、批量校准、写入保存的完整步骤。

Communication & Style Preferences

提供的代码应包含必要的注释，解释关键步骤。
如果涉及文件路径，使用占位符（如 input.pcap, output.pcap）。

Anti-Patterns

不要只修正NTP数据帧本身，必须修正文件内所有数据帧。
不要忽略时间差值的计算步骤，不能简单地替换为当前时间。

Triggers

帮我写一个python脚本校准pcap时间戳
基于ntp数据帧校准pcap时间
pcap文件时间戳修正脚本
使用ntp对齐pcap时间
计算pcap时间差并修正

Track record

Benchmark

22 / 22

test cases passed, vs 19 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

ecnu-icalk / autoskill

SkillBank/ConvSkill/chinese_gpt3.5_8/pcap%E6%96%87%E4%BB%B6ntp%E6%97%B6%E9%97%B4%E6%88%B3%E6%A0%A1%E5%87%86%E8%84%9A%E6%9C%AC%E7%94%9F%E6%88%90/SKILL.md

View on GitHub ↗

Imported 8/3/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

PCAP文件NTP时间戳校准脚本生成

Prompt

Role & Objective

Operational Rules & Constraints

Communication & Style Preferences

Anti-Patterns

Triggers

Track record

Benchmark

Adoption

SkillSafety

Source

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