From 73df946d56c74384511a194dd01dbe099584fd1a Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 15:14:23 +0200 Subject: Adding upstream version 1.16.10. Signed-off-by: Daniel Baumann --- src/net/port_unix.go | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 src/net/port_unix.go (limited to 'src/net/port_unix.go') diff --git a/src/net/port_unix.go b/src/net/port_unix.go new file mode 100644 index 0000000..4fdd9a3 --- /dev/null +++ b/src/net/port_unix.go @@ -0,0 +1,57 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build aix darwin dragonfly freebsd js,wasm linux netbsd openbsd solaris + +// Read system port mappings from /etc/services + +package net + +import ( + "internal/bytealg" + "sync" +) + +var onceReadServices sync.Once + +func readServices() { + file, err := open("/etc/services") + if err != nil { + return + } + defer file.close() + + for line, ok := file.readLine(); ok; line, ok = file.readLine() { + // "http 80/tcp www www-http # World Wide Web HTTP" + if i := bytealg.IndexByteString(line, '#'); i >= 0 { + line = line[:i] + } + f := getFields(line) + if len(f) < 2 { + continue + } + portnet := f[1] // "80/tcp" + port, j, ok := dtoi(portnet) + if !ok || port <= 0 || j >= len(portnet) || portnet[j] != '/' { + continue + } + netw := portnet[j+1:] // "tcp" + m, ok1 := services[netw] + if !ok1 { + m = make(map[string]int) + services[netw] = m + } + for i := 0; i < len(f); i++ { + if i != 1 { // f[1] was port/net + m[f[i]] = port + } + } + } +} + +// goLookupPort is the native Go implementation of LookupPort. +func goLookupPort(network, service string) (port int, err error) { + onceReadServices.Do(readServices) + return lookupPortMap(network, service) +} -- cgit v1.2.3