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// Copyright (c) 2018 Cisco and/or its affiliates.
//
// 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.
// +build !windows,!darwin,!novpp,!beyond18.10
package vppapiclient
/*
#cgo CFLAGS: -DPNG_DEBUG=1
#cgo LDFLAGS: -lvppapiclient
#include "stat_client_wrapper.h"
*/
import "C"
import (
"fmt"
"os"
"unsafe"
"git.fd.io/govpp.git/adapter"
)
// global VPP stats API client, library vppapiclient only supports
// single connection at a time
var globalStatClient *statClient
// statClient is the default implementation of StatsAPI.
type statClient struct {
socketName string
}
// NewStatClient returns new VPP stats API client.
func NewStatClient(socketName string) adapter.StatsAPI {
return &statClient{
socketName: socketName,
}
}
func (c *statClient) Connect() error {
if globalStatClient != nil {
return fmt.Errorf("already connected to stats API, disconnect first")
}
var sockName string
if c.socketName == "" {
sockName = adapter.DefaultStatsSocket
} else {
sockName = c.socketName
}
if _, err := os.Stat(sockName); err != nil {
if os.IsNotExist(err) {
return fmt.Errorf("stats socket file %q does not exists, ensure that VPP is running with `statseg { ... }` section in config", sockName)
}
return fmt.Errorf("stats socket file error: %v", err)
}
rc := C.govpp_stat_connect(C.CString(sockName))
if rc != 0 {
return fmt.Errorf("connecting to VPP stats API failed (rc=%v)", rc)
}
globalStatClient = c
return nil
}
func (c *statClient) Disconnect() error {
globalStatClient = nil
C.govpp_stat_disconnect()
return nil
}
func (c *statClient) ListStats(patterns ...string) (stats []string, err error) {
dir := C.govpp_stat_segment_ls(convertStringSlice(patterns))
if dir == nil {
return nil, adapter.ErrStatsDataBusy
}
defer C.govpp_stat_segment_vec_free(unsafe.Pointer(dir))
l := C.govpp_stat_segment_vec_len(unsafe.Pointer(dir))
for i := 0; i < int(l); i++ {
nameChar := C.govpp_stat_segment_dir_index_to_name(dir, C.uint32_t(i))
stats = append(stats, C.GoString(nameChar))
C.free(unsafe.Pointer(nameChar))
}
return stats, nil
}
func (c *statClient) DumpStats(patterns ...string) (stats []adapter.StatEntry, err error) {
dir := C.govpp_stat_segment_ls(convertStringSlice(patterns))
if dir == nil {
return nil, adapter.ErrStatsDataBusy
}
defer C.govpp_stat_segment_vec_free(unsafe.Pointer(dir))
dump := C.govpp_stat_segment_dump(dir)
if dump == nil {
return nil, adapter.ErrStatsDataBusy
}
defer C.govpp_stat_segment_data_free(dump)
l := C.govpp_stat_segment_vec_len(unsafe.Pointer(dump))
for i := 0; i < int(l); i++ {
v := C.govpp_stat_segment_dump_index(dump, C.int(i))
nameChar := v.name
name := C.GoString(nameChar)
typ := adapter.StatType(C.govpp_stat_segment_data_type(&v))
stat := adapter.StatEntry{
Name: []byte(name),
Type: typ,
}
switch typ {
case adapter.ScalarIndex:
stat.Data = adapter.ScalarStat(C.govpp_stat_segment_data_get_scalar_value(&v))
case adapter.ErrorIndex:
stat.Data = adapter.ErrorStat(C.govpp_stat_segment_data_get_error_value(&v))
case adapter.SimpleCounterVector:
length := int(C.govpp_stat_segment_vec_len(unsafe.Pointer(C.govpp_stat_segment_data_get_simple_counter(&v))))
vector := make([][]adapter.Counter, length)
for k := 0; k < length; k++ {
for j := 0; j < int(C.govpp_stat_segment_vec_len(unsafe.Pointer(C.govpp_stat_segment_data_get_simple_counter_index(&v, C.int(k))))); j++ {
vector[k] = append(vector[k], adapter.Counter(C.govpp_stat_segment_data_get_simple_counter_index_value(&v, C.int(k), C.int(j))))
}
}
stat.Data = adapter.SimpleCounterStat(vector)
case adapter.CombinedCounterVector:
length := int(C.govpp_stat_segment_vec_len(unsafe.Pointer(C.govpp_stat_segment_data_get_combined_counter(&v))))
vector := make([][]adapter.CombinedCounter, length)
for k := 0; k < length; k++ {
for j := 0; j < int(C.govpp_stat_segment_vec_len(unsafe.Pointer(C.govpp_stat_segment_data_get_combined_counter_index(&v, C.int(k))))); j++ {
vector[k] = append(vector[k], adapter.CombinedCounter([2]uint64{
uint64(C.govpp_stat_segment_data_get_combined_counter_index_packets(&v, C.int(k), C.int(j))),
uint64(C.govpp_stat_segment_data_get_combined_counter_index_bytes(&v, C.int(k), C.int(j))),
}))
}
}
stat.Data = adapter.CombinedCounterStat(vector)
case adapter.NameVector:
length := int(C.govpp_stat_segment_vec_len(unsafe.Pointer(C.govpp_stat_segment_data_get_name_vector(&v))))
var vector []adapter.Name
for k := 0; k < length; k++ {
s := C.govpp_stat_segment_data_get_name_vector_index(&v, C.int(k))
var name adapter.Name
if s != nil {
name = adapter.Name(C.GoString(s))
}
vector = append(vector, name)
}
stat.Data = adapter.NameStat(vector)
default:
fmt.Fprintf(os.Stderr, "invalid stat type: %v (%v)\n", typ, name)
continue
}
stats = append(stats, stat)
}
return stats, nil
}
func (c *statClient) PrepareDir(prefixes ...string) (*adapter.StatDir, error) {
return nil, adapter.ErrNotImplemented
}
func (c *statClient) UpdateDir(dir *adapter.StatDir) error {
return adapter.ErrNotImplemented
}
func convertStringSlice(strs []string) **C.uint8_t {
var arr **C.uint8_t
for _, str := range strs {
arr = C.govpp_stat_segment_string_vector(arr, C.CString(str))
}
return arr
}
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