EIP-Server

A small EtherNet/IP (CIP) test server written in Go. It uses the gologix library to start a Logix‑compatible endpoint that exposes a predictable set of tags—ideal for integration tests or client demos.

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Quick start (local)

# clone the repo
git clone https://github.com/united-manufacturing-hub/eip-server && cd eip-server

# run with defaults (booltags=10, inttags=10, path="1,0")
make run

# or build a binary
make build
./eip-server -booltags 32 -inttags 64 -path "1,0"

The server listens on TCP/44818 (the EtherNet/IP standard port). Use any compatible client (e.g., PyLogix, gologix, Studio 5000) to browse the tags.

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Run in Docker

docker run -p 44818:44818 ghcr.io/united-manufacturing-hub/eip-server:latest \
           -booltags 32 -inttags 64 -path "1,0"

docker-compose example

eip-server:
  image: ghcr.io/united-manufacturing-hub/eip-server:latest
  ports:
    - "44818:44818"
  command: ["-booltags", "32", "-inttags", "64", "-path", "1,0"]

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CLI flags

Flag	Default	Description
-booltags	10	How many Bool<N> tags to auto-create
-inttags	10	How many Int<N> tags to auto-create
-path	1,0	CIP routing path (e.g. slot number)

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Tags exposed by default

The program creates a deterministic dataset on startup (arrays have length 10 unless noted):

Name	Go type	Logix type	Example value
Bool1…BoolN	bool	BOOL	true / false
Int1…IntN	int16	INT	123
testbyte	byte	SINT	0x01
testint8	int8	SINT	-16
testint16	int16	INT	3
testint32	int32	DINT	12 345
testint64	int64	LINT	12 345 678
testuint	uint16	UINT	123
testuint32	uint32	UDINT	1 234
testuint64	uint64	LWORD	1 234 567
testfloat32	float32	REAL	543.21
testfloat64	float64	LREAL	10 238.21
teststring	string	STRING	"Hello World"
…array variants	slices	ARRAY[]	see code