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e791f319f0
This patch adds a go-multiaddr CLI to aid in testing this implementation of multiaddr. It takes a multiaddr in string or packed form as input, and prints detailed information about the multiaddr. This tool can be useful beyond testing, of course. Another addition is a Makefile target for running the new multiaddr conformance test suite. This test suite lives at https://github.com/multiformats/multiaddr and is fetched to be run against our new go-multiaddr CLI. This target is to be run in CI Neither the test suite nor the CLI are complete yet. Currently the output looks like this: ``` > go run ./multiaddr /ip4/192.0.2.42/tcp/443 | jq . { "string": "/ip4/192.0.2.42/tcp/443", "stringSize": "23", "packed": "0x04c000022a0601bb", "packedSize": "8", "components": [ { "string": "/ip4/192.0.2.42", "stringSize": "15", "packed": "0x04c000022a", "packedSize": "5", "value": "192.0.2.42", "rawValue": "0xc000022a", "valueSize": "4", "protocol": "ip4", "codec": "4", "uvarint": "0x04", "lengthPrefix": "" }, { "string": "/tcp/443", "stringSize": "8", "packed": "0x0601bb", "packedSize": "3", "value": "443", "rawValue": "0x01bb", "valueSize": "2", "protocol": "tcp", "codec": "6", "uvarint": "0x06", "lengthPrefix": "" } ] } ``` And the Makefile target: ``` > make conformance go get -d -v . go build -o tmp/multiaddr/test/go-multiaddr ./multiaddr cd tmp/multiaddr/test && MULTIADDR_BIN="./go-multiaddr" go test -v === RUN TestGodog MULTIADDR_BIN="./go-multiaddr" Feature: Multiaddr Scenario: Banana # multiaddr.feature:3 Given the multiaddr /ip4/192.0.2.42/tcp/443 # main_test.go:81 -> github.com/multiformats/multiaddr/test_test.theMultiaddr Then the packed form is 0x04c000022a0601bb # main_test.go:98 -> github.com/multiformats/multiaddr/test_test.thePackedFormIs And the packed size is 8 bytes # main_test.go:105 -> github.com/multiformats/multiaddr/test_test.thePackedSizeIs And the components are: # main_test.go:126 -> github.com/multiformats/multiaddr/test_test.theComponentsAre | string | stringSize | packed | packedSize | value | valueSize | protocol | codec | uvarint | lengthPrefix | rawValue | | /ip4/192.0.2.42 | 15 | 0x04c000022a | 5 | 192.0.2.42 | 4 | ip4 | 4 | 0x04 | | 0xc000022a | | /tcp/443 | 8 | 0x0601bb | 3 | 443 | 2 | tcp | 6 | 0x06 | | 0x01bb | Scenario: Banana #2 # multiaddr.feature:12 Given the multiaddr 0x04c000022a0601bb # main_test.go:81 -> github.com/multiformats/multiaddr/test_test.theMultiaddr Then the string form is /ip4/192.0.2.42/tcp/443 # main_test.go:112 -> github.com/multiformats/multiaddr/test_test.theStringFormIs And the string size is 23 bytes # main_test.go:119 -> github.com/multiformats/multiaddr/test_test.theStringSizeIs And the components are: # main_test.go:126 -> github.com/multiformats/multiaddr/test_test.theComponentsAre | string | stringSize | packed | packedSize | value | valueSize | protocol | codec | uvarint | lengthPrefix | rawValue | | /ip4/192.0.2.42 | 15 | 0x04c000022a | 5 | 192.0.2.42 | 4 | ip4 | 4 | 0x04 | | 0xc000022a | | /tcp/443 | 8 | 0x0601bb | 3 | 443 | 2 | tcp | 6 | 0x06 | | 0x01bb | 2 scenarios (2 passed) 8 steps (8 passed) 3.187755ms --- PASS: TestGodog (0.00s) PASS ok github.com/multiformats/multiaddr/test 0.012s ```
go-multiaddr
multiaddr implementation in go
Multiaddr is a standard way to represent addresses that:
- Support any standard network protocols.
- Self-describe (include protocols).
- Have a binary packed format.
- Have a nice string representation.
- Encapsulate well.
Table of Contents
Install
go get github.com/multiformats/go-multiaddr
Usage
Example
Simple
import ma "github.com/multiformats/go-multiaddr"
// construct from a string (err signals parse failure)
m1, err := ma.NewMultiaddr("/ip4/127.0.0.1/udp/1234")
// construct from bytes (err signals parse failure)
m2, err := ma.NewMultiaddrBytes(m1.Bytes())
// true
strings.Equal(m1.String(), "/ip4/127.0.0.1/udp/1234")
strings.Equal(m1.String(), m2.String())
bytes.Equal(m1.Bytes(), m2.Bytes())
m1.Equal(m2)
m2.Equal(m1)
Protocols
// get the multiaddr protocol description objects
m1.Protocols()
// []Protocol{
// Protocol{ Code: 4, Name: 'ip4', Size: 32},
// Protocol{ Code: 17, Name: 'udp', Size: 16},
// }
En/decapsulate
import ma "github.com/multiformats/go-multiaddr"
m, err := ma.NewMultiaddr("/ip4/127.0.0.1/udp/1234")
// <Multiaddr /ip4/127.0.0.1/udp/1234>
sctpMA, err := ma.NewMultiaddr("/sctp/5678")
m.Encapsulate(sctpMA)
// <Multiaddr /ip4/127.0.0.1/udp/1234/sctp/5678>
udpMA, err := ma.NewMultiaddr("/udp/1234")
m.Decapsulate(udpMA) // up to + inc last occurrence of subaddr
// <Multiaddr /ip4/127.0.0.1>
Tunneling
Multiaddr allows expressing tunnels very nicely.
printer, _ := ma.NewMultiaddr("/ip4/192.168.0.13/tcp/80")
proxy, _ := ma.NewMultiaddr("/ip4/10.20.30.40/tcp/443")
printerOverProxy := proxy.Encapsulate(printer)
// /ip4/10.20.30.40/tcp/443/ip4/192.168.0.13/tcp/80
proxyAgain := printerOverProxy.Decapsulate(printer)
// /ip4/10.20.30.40/tcp/443
Contribute
Contributions welcome. Please check out the issues.
Check out our contributing document for more information on how we work, and about contributing in general. Please be aware that all interactions related to multiformats are subject to the IPFS Code of Conduct.
Small note: If editing the README, please conform to the standard-readme specification.
License
MIT © 2014 Juan Batiz-Benet