// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package p2p

import (
	"errors"
	"fmt"
)

const (
	errInvalidMsgCode = iota
	errInvalidMsg
)

var errorToString = map[int]string{
	errInvalidMsgCode: "invalid message code",
	errInvalidMsg:     "invalid message",
}

type peerError struct {
	code    int
	message string
}

func newPeerError(code int, format string, v ...interface{}) *peerError {
	desc, ok := errorToString[code]
	if !ok {
		panic("invalid error code")
	}
	err := &peerError{code, desc}
	if format != "" {
		err.message += ": " + fmt.Sprintf(format, v...)
	}
	return err
}

func (pe *peerError) Error() string {
	return pe.message
}

var errProtocolReturned = errors.New("protocol returned")

type DiscReason uint

const (
	DiscRequested DiscReason = iota
	DiscNetworkError
	DiscProtocolError
	DiscUselessPeer
	DiscTooManyPeers
	DiscAlreadyConnected
	DiscIncompatibleVersion
	DiscInvalidIdentity
	DiscQuitting
	DiscUnexpectedIdentity
	DiscSelf
	DiscReadTimeout
	DiscSubprotocolError = 0x10
)

var discReasonToString = [...]string{
	DiscRequested:           "disconnect requested",
	DiscNetworkError:        "network error",
	DiscProtocolError:       "breach of protocol",
	DiscUselessPeer:         "useless peer",
	DiscTooManyPeers:        "too many peers",
	DiscAlreadyConnected:    "already connected",
	DiscIncompatibleVersion: "incompatible p2p protocol version",
	DiscInvalidIdentity:     "invalid node identity",
	DiscQuitting:            "client quitting",
	DiscUnexpectedIdentity:  "unexpected identity",
	DiscSelf:                "connected to self",
	DiscReadTimeout:         "read timeout",
	DiscSubprotocolError:    "subprotocol error",
}

func (d DiscReason) String() string {
	if len(discReasonToString) < int(d) {
		return fmt.Sprintf("unknown disconnect reason %d", d)
	}
	return discReasonToString[d]
}

func (d DiscReason) Error() string {
	return d.String()
}

func discReasonForError(err error) DiscReason {
	if reason, ok := err.(DiscReason); ok {
		return reason
	}
	if err == errProtocolReturned {
		return DiscQuitting
	}
	peerError, ok := err.(*peerError)
	if ok {
		switch peerError.code {
		case errInvalidMsgCode, errInvalidMsg:
			return DiscProtocolError
		default:
			return DiscSubprotocolError
		}
	}
	return DiscSubprotocolError
}
/npm_and_yarn/devel/electron6/files/elliptic-6.5.3'>dependabot/npm_and_yarn/devel/electron6/files/elliptic-6.5.3</option>
<option value='dependabot/npm_and_yarn/devel/electron6/files/elliptic-6.5.4'>dependabot/npm_and_yarn/devel/electron6/files/elliptic-6.5.4</option>
<option value='dependabot/npm_and_yarn/devel/electron6/files/ini-1.3.8'>dependabot/npm_and_yarn/devel/electron6/files/ini-1.3.8</option>
<option value='dependabot/npm_and_yarn/devel/electron6/files/lodash-4.17.19'>dependabot/npm_and_yarn/devel/electron6/files/lodash-4.17.19</option>
<option value='dependabot/npm_and_yarn/devel/electron6/files/lodash.merge-4.6.2'>dependabot/npm_and_yarn/devel/electron6/files/lodash.merge-4.6.2</option>
<option value='dependabot/npm_and_yarn/devel/electron6/files/node-fetch-2.6.1'>dependabot/npm_and_yarn/devel/electron6/files/node-fetch-2.6.1</option>
<option value='dependabot/npm_and_yarn/devel/electron6/files/serve-10.1.2'>dependabot/npm_and_yarn/devel/electron6/files/serve-10.1.2</option>
<option value='gnome-3.22'>gnome-3.22</option>
<option value='gnome-3.24'>gnome-3.24</option>
<option value='gnome-3.26'>gnome-3.26</option>
<option value='gnome-3.28'>gnome-3.28</option>
<option value='gnome-3.32'>gnome-3.32</option>
<option value='gnome-3.36'>gnome-3.36</option>
<option value='gstreamer'>gstreamer</option>
<option value='gstreamer-1.16'>gstreamer-1.16</option>
<option value='gstreamer0.10-removal'>gstreamer0.10-removal</option>
<option value='main' selected='selected'>main</option>
<option value='master'>master</option>
<option value='mate-1.16'>mate-1.16</option>
<option value='mate-1.18'>mate-1.18</option>
<option value='mate-1.20'>mate-1.20</option>
<option value='mate-1.22'>mate-1.22</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>FreeBSD GNOME current development ports (https://github.com/freebsd/freebsd-ports-gnome)</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/about/'>about</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/'>summary</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/refs/'>refs</a><a class='active' href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www/p5-Nginx-Simple/distinfo'>log</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/tree/www/p5-Nginx-Simple/distinfo'>tree</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/commit/www/p5-Nginx-Simple/distinfo'>commit</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/diff/www/p5-Nginx-Simple/distinfo'>diff</a><a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/stats/www/p5-Nginx-Simple/distinfo'>stats</a></td><td class='form'><form class='right' method='get' action='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www/p5-Nginx-Simple/distinfo'>
<select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/'>root</a>/<a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www'>www</a>/<a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www/p5-Nginx-Simple'>p5-Nginx-Simple</a>/<a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www/p5-Nginx-Simple/distinfo'>distinfo</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th></th><th class='left'>Commit message (<a href='/~lantw44/cgit/cgit.cgi/freebsd-ports-gnome/log/www/p5-Nginx-Simple/distinfo?showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Age</th><th class='left'>Files</th><th class='left'>Lines</th></tr>