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Package hostport

import "cmd/vendor/golang.org/x/tools/go/analysis/passes/hostport"
Overview
Index

Overview ▾

Package hostport defines an analyzer for calls to net.Dial with addresses of the form "%s:%d" or "%s:%s", which work only with IPv4.

Index ▾

Package files

hostport.go

Constants

const Doc = `check format of addresses passed to net.Dial

This analyzer flags code that produce network address strings using
fmt.Sprintf, as in this example:

    addr := fmt.Sprintf("%s:%d", host, 12345) // "will not work with IPv6"
    ...
    conn, err := net.Dial("tcp", addr)       // "when passed to dial here"

The analyzer suggests a fix to use the correct approach, a call to
net.JoinHostPort:

    addr := net.JoinHostPort(host, "12345")
    ...
    conn, err := net.Dial("tcp", addr)

A similar diagnostic and fix are produced for a format string of "%s:%s".
`

Variables

var Analyzer = &analysis.Analyzer{
    Name:     "hostport",
    Doc:      Doc,
    URL:      "https://pkg.go.dev/golang.org/x/tools/go/analysis/passes/hostport",
    Requires: []*analysis.Analyzer{inspect.Analyzer, typeindexanalyzer.Analyzer},
    Run:      run,
}