mirror of
https://github.com/LIV2/go.wemo.git
synced 2025-12-05 22:22:46 +00:00
57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
// Package wemo ...
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// Copyright 2014 Matt Ho
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package wemo
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import (
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"errors"
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"log"
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"net"
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"regexp"
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)
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var ipAddrRE = regexp.MustCompile(`^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/\d{1,3}$`)
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// NewByIP ...
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func NewByIP(ipAddr string) *Wemo {
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return &Wemo{ipAddr: ipAddr, sourcePort: 0, Debug: false}
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}
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// NewByInterface find the ip address associated with the specified interface
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func NewByInterface(name string) (*Wemo, error) {
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// find the interface with the selected name
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iface, err := net.InterfaceByName(name)
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if err != nil {
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log.Printf("Unable to find interface, %s\n", name)
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return nil, err
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}
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// find all the addresses associated with this address
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addrs, err := iface.Addrs()
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if err != nil {
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log.Printf("No addresses associated with interface, %s\n", iface.Name)
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return nil, err
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}
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// and find the one that looks like an IPv4 address
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for _, addr := range addrs {
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if matches := ipAddrRE.FindStringSubmatch(addr.String()); len(matches) == 2 {
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return NewByIP(matches[1]), nil
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}
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}
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// nope, couldn't find one
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return nil, errors.New("unable to find ip address associated with interface, " + name)
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}
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