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types.go
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types.go
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// Copyright 2018 Authors of Cilium
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package api
import (
"encoding/json"
"fmt"
"strconv"
"strings"
"time"
"github.com/cilium/cilium/pkg/monitor/notifications"
)
// Must be synchronized with <bpf/lib/common.h>
const (
// 0-128 are reserved for BPF datapath events
MessageTypeUnspec = iota
MessageTypeDrop
MessageTypeDebug
MessageTypeCapture
MessageTypeTrace
// 129-255 are reserved for agent level events
// MessageTypeAccessLog contains a pkg/proxy/accesslog.LogRecord
MessageTypeAccessLog = 129
// MessageTypeAgent is an agent notification carrying a AgentNotify
MessageTypeAgent = 130
)
type MessageTypeFilter []int
var (
// MessageTypeNames is a map of all type names
MessageTypeNames = map[string]int{
"drop": MessageTypeDrop,
"debug": MessageTypeDebug,
"capture": MessageTypeCapture,
"trace": MessageTypeTrace,
"l7": MessageTypeAccessLog,
"agent": MessageTypeAgent,
}
)
func type2name(typ int) string {
for name, value := range MessageTypeNames {
if value == typ {
return name
}
}
return strconv.Itoa(typ)
}
func (m *MessageTypeFilter) String() string {
pieces := make([]string, 0, len(*m))
for _, typ := range *m {
pieces = append(pieces, type2name(typ))
}
return strings.Join(pieces, ",")
}
func (m *MessageTypeFilter) Set(value string) error {
i, err := MessageTypeNames[value]
if !err {
return fmt.Errorf("Unknown type (%s). Please use one of the following ones %v",
value, MessageTypeNames)
}
*m = append(*m, i)
return nil
}
func (m *MessageTypeFilter) Type() string {
return "[]string"
}
func (m *MessageTypeFilter) Contains(typ int) bool {
for _, v := range *m {
if v == typ {
return true
}
}
return false
}
// AgentNotify is a notification from the agent
type AgentNotify struct {
Type AgentNotification
Text string
}
// AgentNotification specifies the type of agent notification
type AgentNotification uint32
const (
AgentNotifyUnspec AgentNotification = iota
AgentNotifyGeneric
AgentNotifyStart
AgentNotifyEndpointRegenerateSuccess
AgentNotifyEndpointRegenerateFail
AgentNotifyPolicyUpdated
AgentNotifyPolicyDeleted
)
var notifyTable = map[AgentNotification]string{
AgentNotifyUnspec: "unspecified",
AgentNotifyGeneric: "Message",
AgentNotifyStart: "Cilium agent started",
AgentNotifyEndpointRegenerateSuccess: "Endpoint regenerated",
AgentNotifyEndpointRegenerateFail: "Failed endpoint regeneration",
AgentNotifyPolicyUpdated: "Policy updated",
AgentNotifyPolicyDeleted: "Policy deleted",
}
func resolveAgentType(t AgentNotification) string {
if n, ok := notifyTable[t]; ok {
return n
}
return fmt.Sprintf("%d", t)
}
// DumpInfo dumps an agent notification
func (n *AgentNotify) DumpInfo() {
fmt.Printf(">> %s: %s\n", resolveAgentType(n.Type), n.Text)
}
func (n *AgentNotify) getJSON() string {
return fmt.Sprintf(`{"type":"agent","subtype":"%s","message":%s}`, resolveAgentType(n.Type), n.Text)
}
// DumpJSON prints notification in json format
func (n *AgentNotify) DumpJSON() {
fmt.Println(n.getJSON())
}
// PolicyUpdateNotification structures update notification
type PolicyUpdateNotification struct {
Labels []string `json:"labels,omitempty"`
Revision uint64 `json:"revision,omitempty"`
RuleCount int `json:"rule_count"`
}
// PolicyUpdateRepr returns string representation of monitor notification
func PolicyUpdateRepr(numRules int, labels []string, revision uint64) (string, error) {
notification := PolicyUpdateNotification{
Labels: labels,
Revision: revision,
RuleCount: numRules,
}
repr, err := json.Marshal(notification)
return string(repr), err
}
// PolicyDeleteRepr returns string representation of monitor notification
func PolicyDeleteRepr(deleted int, labels []string, revision uint64) (string, error) {
notification := PolicyUpdateNotification{
Labels: labels,
Revision: revision,
RuleCount: deleted,
}
repr, err := json.Marshal(notification)
return string(repr), err
}
// EndpointRegenNotification structures regeneration notification
type EndpointRegenNotification struct {
ID uint64 `json:"id,omitempty"`
Labels []string `json:"labels,omitempty"`
Error string `json:"error,omitempty"`
}
// EndpointRegenRepr returns string representation of monitor notification
func EndpointRegenRepr(e notifications.RegenNotificationInfo, err error) (string, error) {
notification := EndpointRegenNotification{
ID: e.GetID(),
Labels: e.GetOpLabels(),
}
if err != nil {
notification.Error = err.Error()
}
repr, err := json.Marshal(notification)
return string(repr), err
}
// TimeNotification structures agent start notification
type TimeNotification struct {
Time string `json:"time"`
}
// TimeRepr returns string representation of monitor notification
func TimeRepr(t time.Time) (string, error) {
notification := TimeNotification{
Time: t.String(),
}
repr, err := json.Marshal(notification)
return string(repr), err
}