mirror of
https://github.com/caddyserver/caddy.git
synced 2025-11-04 03:27:23 -05:00
96 lines
2.5 KiB
Go
96 lines
2.5 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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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 logging
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import (
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"net"
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"github.com/caddyserver/caddy/v2"
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"go.uber.org/zap/zapcore"
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)
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func init() {
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caddy.RegisterModule(DeleteFilter{})
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caddy.RegisterModule(IPMaskFilter{})
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}
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// LogFieldFilter can filter (or manipulate)
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// a field in a log entry.
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type LogFieldFilter interface {
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Filter(zapcore.Field) zapcore.Field
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}
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// DeleteFilter is a Caddy log field filter that
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// deletes the field.
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type DeleteFilter struct{}
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// CaddyModule returns the Caddy module information.
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func (DeleteFilter) CaddyModule() caddy.ModuleInfo {
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return caddy.ModuleInfo{
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ID: "caddy.logging.encoders.filter.delete",
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New: func() caddy.Module { return new(DeleteFilter) },
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}
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}
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// Filter filters the input field.
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func (DeleteFilter) Filter(in zapcore.Field) zapcore.Field {
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in.Type = zapcore.SkipType
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return in
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}
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// IPMaskFilter is a Caddy log field filter that
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// masks IP addresses.
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type IPMaskFilter struct {
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// The IPv4 range in CIDR notation.
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IPv4CIDR int `json:"ipv4_cidr,omitempty"`
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// The IPv6 range in CIDR notation.
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IPv6CIDR int `json:"ipv6_cidr,omitempty"`
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}
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// CaddyModule returns the Caddy module information.
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func (IPMaskFilter) CaddyModule() caddy.ModuleInfo {
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return caddy.ModuleInfo{
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ID: "caddy.logging.encoders.filter.ip_mask",
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New: func() caddy.Module { return new(IPMaskFilter) },
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}
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}
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// Filter filters the input field.
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func (m IPMaskFilter) Filter(in zapcore.Field) zapcore.Field {
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host, port, err := net.SplitHostPort(in.String)
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if err != nil {
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host = in.String // assume whole thing was IP address
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}
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ipAddr := net.ParseIP(host)
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if ipAddr == nil {
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return in
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}
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bitLen := 32
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cidrPrefix := m.IPv4CIDR
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if ipAddr.To16() != nil {
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bitLen = 128
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cidrPrefix = m.IPv6CIDR
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}
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mask := net.CIDRMask(cidrPrefix, bitLen)
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masked := ipAddr.Mask(mask)
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if port == "" {
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in.String = masked.String()
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} else {
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in.String = net.JoinHostPort(masked.String(), port)
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}
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return in
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}
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