Protocol is a command-line tool to display ASCII RFC-like protocol header diagrams for both existing network protocols or user-defined ones (using a very simple syntax). Protocol is written in Python and it's open-source software, licensed under the GPLv3 license.
This project re-implements protocol in go-lang. Compiled protocol is very suitable for environments where python is not installed.
github: A Simple ASCII Header Generator for Network Protocols
$ go install github.com/ryungmin/protocol-go/cmd/protocol@latest
$ make
$ task
$ GOOS=linux go build -o protocol ./cmd/protocol/.
> SET GOOS=windows & SET GOARCH=amd64 & go.exe build -o protocol.exe .\cmd\protocol\.
# build for Intel MAC(x64)
$ GOOS=darwin GOARCH=amd64 go build -o protocol_amd64 ./cmd/protocol/.
# build for Apple Silicon(arm64)
$ GOOS=darwin GOARCH=arm64 go build -o protocol_arm64 ./cmd/protocol/.
# Create an universal file
$ lipo -create -output protocol protocol_amd64 protocol_arm64
$ protocol "Source:16,TTL:8,Reserved:40"
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source | TTL | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +
| Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* Source (16 bytes)
* TTL (8 bytes)
* Reserved (40 bytes)
total 64 bytes
$ protocol "Source:16,Reserved:40,TTL:8"
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
| Reserved | TTL |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* Source (16 bytes)
* Reserved (40 bytes)
* TTL (8 bytes)
total 64 bytes
$ protocol "Reserved:32,Target Address:128"
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ +
| |
+ Target Address +
| |
+ +
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* Reserved (32 bytes)
* Target Address (128 bytes)
total 160 bytes
$ protocol --list
Usage: protocol.exe "<protocol>"
+----------------------------------------------------------------------------------------+
| Protocol | <protocol> |
+----------------------------------------------------------------------------------------+
| COTP for Connect Confirm | cotp_cc |
| COTP for Data | cotp_dt |
| COTP for Disconnect Request | cotp_dr |
| Connection-oriented Transport Protocol (COTP) for Connect Request | cotp_cr |
| Distributed Network Protocol 3.0 (DNP3) | dnp3 |
| Dynamic Host Configuration Protocol | dhcp |
| Ethernet | ethernet |
| Example | example |
| ICMP Destination Unreachable | icmp-destination |
| ICMP Echo Request/Reply | icmp-echo |
| ICMP Information Request/Reply | icmp-information |
| ICMP Parameter Problem | icmp-parameter |
| ICMP Redirect | icmp-redirect |
| ICMP Source Quench | icmp-source |
| ICMP Time Exceeded | icmp-time |
| ICMP Timestamp Request/Reply | icmp-timestamp |
| ICMP for IPv6 (ICMPv6) | icmpv6 |
| ICMPv6 Destination Unreachable | icmpv6-destination |
| ICMPv6 Echo Request/Reply | icmpv6-echo |
| ICMPv6 Neighbor Advertisement | icmpv6-nadv |
| ICMPv6 Neighbor Solicitation | icmpv6-nsol |
| ICMPv6 Packet Too Big | icmpv6-big |
| ICMPv6 Parameter Problem | icmpv6-parameter |
| ICMPv6 Redirect | icmpv6-redirect |
| ICMPv6 Router Advertisement | icmpv6-radv |
| ICMPv6 Router Solicitation | icmpv6-rsol |
| ICMPv6 Time Exceeded | icmpv6-time |
| IEEE 802.1q | dot1q |
| IEEE 802.1q | 8021q |
| Internet Control Message Protocol (ICMP) | icmp |
| Internet Protocol (IP), version 4. | ipv4 |
| Internet Protocol (IP), version 4. | ip |
| Internet Protocol (IP), version 6. | ipv6 |
| Modbus TCP | modbus_tcp |
| PROFINET Real Time (RT) | profinet_rt |
| S7 Communication (S7Comm) Header | s7_header |
| S7Comm Data | s7_data |
| S7Comm Item | s7_item |
| Test | test |
| Texas Simplified Application Project (TSAP) | tsap |
| Transmission Control Protocol (TCP) | tcp |
| User Datagram Protocol (TCP) | udp |
+----------------------------------------------------------------------------------------+
$ protocol tcp
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source Port | Destination Port |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Sequence Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Acknowledgment Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Offset | Res. | Flags | Window |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Checksum | Urgent Pointer |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Options | Padding |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* Source Port (16 bytes)
* Destination Port (16 bytes)
* Sequence Number (32 bytes)
* Acknowledgment Number (32 bytes)
* Offset (4 bytes)
* Res. (4 bytes)
* Flags (8 bytes)
* Window (16 bytes)
* Checksum (16 bytes)
* Urgent Pointer (16 bytes)
* Options (24 bytes)
* Padding (8 bytes)
total 192 bytes
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent