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DoIP (Diagnostics over IP) transport layer for automotive UDS — ISO 13400

Project description

autodoip

autodoip 是一个零依赖、纯 Python 实现的 DoIP (Diagnostics over IP) 传输层,严格遵循 ISO 13400 标准,适用于汽车 UDS (Unified Diagnostic Services) 诊断通信。

采用 Tester-as-Server 拓扑:Tester 监听单一端口,所有 ECU 主动连接至此端口,帧路由通过 DoIP 头中的逻辑地址完成。

特性

  • 完全符合 ISO 13400 帧格式(版本反码、Payload Type、地址校验)
  • 自动连接管理、空闲超时与断连自动重连
  • 重连成功后抛出 ReconnectionError,由上层决定是否重发(适配有状态诊断会话)
  • 支持多帧响应迭代(例如 0x7F … 0x78 延迟指示)
  • 线程安全的状态切换与收发
  • 零外部依赖,仅使用 Python 标准库

安装

pip install autodoip

要求 Python ≥ 3.14。

快速开始

from autodoip import Endpoint

# 创建端点:监听 192.168.10.1:13400,预定义两个 ECU
endpoint = Endpoint(
    ip="192.168.10.1",
    ecus={
        0x1301: ("192.168.10.10", 0),  # port=0 表示不校验端口
        0x1302: ("192.168.10.20", 13400),
    },
)

endpoint.start()  # 开始接受 ECU 连接

# 查看连接状态
print(endpoint.connections)
# {0x1301: ('192.168.10.10', 0, True), 0x1302: ('192.168.10.20', 13400, False)}

# 切换到已连接的 ECU 并发送诊断请求
endpoint.select(0x1301)
for resp in endpoint.conversation(bytes.fromhex("22FF00")):
    print(resp.hex(" "))

# 处理断连重连(适用于有状态诊断会话)
from autodoip import ReconnectionError

try:
    for resp in endpoint.conversation(bytes.fromhex("22FF00")):
        print(resp.hex(" "))
except ReconnectionError:
    # 连接已恢复,但 ECU 状态已重置(会话、安全访问等)
    # 上层需重新同步状态后重试
    pass

命令行工具

安装后可直接通过 python -m autodoip 发送单次诊断请求:

python -m autodoip \
    --ecu 0x1301 \
    --ecu-ip 192.168.10.10 \
    --payload 22FF00

所有参数说明可通过 --help 查看。

API 概览

类/函数 说明
Endpoint(ip, ecus, port=13400, tester=0x0E80, config=None) DoIP 端点,ipecus 必填
Endpoint.start() 启动监听,幂等;需重启则新建实例
Endpoint.select(addr) -> bool 切换当前 ECU;未连接或操作冲突时返回 False 且不改变选中
Endpoint.conversation(payload) -> Iterator[bytes] 发送 UDS 载荷,返回响应迭代器。断连自动重连:成功抛 ReconnectionError,失败抛 ConnectionError
Endpoint.current -> int | None 当前选中的 ECU 逻辑地址
Endpoint.connections -> dict {addr: (ip, port, connected), ...}
Config(...) 传输调优参数(见下方)
ProtocolError 帧校验失败时抛出的异常
ReconnectionError 断连重连成功后抛出,继承 ConnectionError。上层可据此重新同步 ECU 状态后重试

配置

from autodoip import Config, Endpoint

config = Config(
    accept_timeout=1.5,   # accept 超时 (秒)
    p6_timeout=0.05,      # 单次 recv 超时 (秒)
    p6_star_timeout=5.0,  # 整体接收窗口超时 (秒)
    listen_count=5,       # socket listen backlog
    version=0x02,         # DoIP 协议版本
    msg_type=0x8001,      # Payload Type
    byte_order="big",     # 字节序 ("big" / "little")
)

# 将配置传入 Endpoint
endpoint = Endpoint(
    ip="192.168.10.1",
    ecus={
        0x1301: ("192.168.10.10", 0),
        0x1302: ("192.168.10.20", 13400),
    },
    config=config,
)

许可证

MIT License

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