Source: xfrm.go in package github.com/prometheus/procfs

Copyright 2017 Prometheus Team 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 procfs

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

XfrmStat models the contents of /proc/net/xfrm_stat.

All errors which are not matched by other

No buffer is left

Header Error

No state found i.e. either inbound SPI, address, or IPSEC protocol at SA is wrong

Transformation protocol specific error e.g. SA Key is wrong

Transformation mode specific error

Sequence error e.g. sequence number is out of window

State is expired

State has mismatch option e.g. UDP encapsulation type is mismatched

State is invalid

No matching template for states e.g. Inbound SAs are correct but SP rule is wrong

No policy is found for states e.g. Inbound SAs are correct but no SP is found

Policy discards

Policy error

All errors which are not matched by others

Bundle generation error

Bundle check error

No state was found

Transformation protocol specific error

Transportation mode specific error

Sequence error i.e sequence number overflow

State is expired

Policy discads

Policy is dead

Policy Error

	XfrmOutPolError     int
	XfrmFwdHdrError     int
	XfrmOutStateInvalid int
	XfrmAcquireError    int
}

NewXfrmStat reads the xfrm_stat statistics.

func NewXfrmStat() (XfrmStat, error) {
	fs, err := NewFS(DefaultMountPoint)
	if err != nil {
		return XfrmStat{}, err
	}

	return fs.NewXfrmStat()
}

NewXfrmStat reads the xfrm_stat statistics from the 'proc' filesystem.

func (fs FS) NewXfrmStat() (XfrmStat, error) {
	file, err := os.Open(fs.proc.Path("net/xfrm_stat"))
	if err != nil {
		return XfrmStat{}, err
	}
	defer file.Close()

	var (
		x = XfrmStat{}
		s = bufio.NewScanner(file)
	)

	for s.Scan() {
		fields := strings.Fields(s.Text())

		if len(fields) != 2 {
			return XfrmStat{}, fmt.Errorf(
				"couldn't parse %s line %s", file.Name(), s.Text())
		}

		name := fields[0]
		value, err := strconv.Atoi(fields[1])
		if err != nil {
			return XfrmStat{}, err
		}

		switch name {
		case "XfrmInError":
			x.XfrmInError = value
		case "XfrmInBufferError":
			x.XfrmInBufferError = value
		case "XfrmInHdrError":
			x.XfrmInHdrError = value
		case "XfrmInNoStates":
			x.XfrmInNoStates = value
		case "XfrmInStateProtoError":
			x.XfrmInStateProtoError = value
		case "XfrmInStateModeError":
			x.XfrmInStateModeError = value
		case "XfrmInStateSeqError":
			x.XfrmInStateSeqError = value
		case "XfrmInStateExpired":
			x.XfrmInStateExpired = value
		case "XfrmInStateInvalid":
			x.XfrmInStateInvalid = value
		case "XfrmInTmplMismatch":
			x.XfrmInTmplMismatch = value
		case "XfrmInNoPols":
			x.XfrmInNoPols = value
		case "XfrmInPolBlock":
			x.XfrmInPolBlock = value
		case "XfrmInPolError":
			x.XfrmInPolError = value
		case "XfrmOutError":
			x.XfrmOutError = value
		case "XfrmInStateMismatch":
			x.XfrmInStateMismatch = value
		case "XfrmOutBundleGenError":
			x.XfrmOutBundleGenError = value
		case "XfrmOutBundleCheckError":
			x.XfrmOutBundleCheckError = value
		case "XfrmOutNoStates":
			x.XfrmOutNoStates = value
		case "XfrmOutStateProtoError":
			x.XfrmOutStateProtoError = value
		case "XfrmOutStateModeError":
			x.XfrmOutStateModeError = value
		case "XfrmOutStateSeqError":
			x.XfrmOutStateSeqError = value
		case "XfrmOutStateExpired":
			x.XfrmOutStateExpired = value
		case "XfrmOutPolBlock":
			x.XfrmOutPolBlock = value
		case "XfrmOutPolDead":
			x.XfrmOutPolDead = value
		case "XfrmOutPolError":
			x.XfrmOutPolError = value
		case "XfrmFwdHdrError":
			x.XfrmFwdHdrError = value
		case "XfrmOutStateInvalid":
			x.XfrmOutStateInvalid = value
		case "XfrmAcquireError":
			x.XfrmAcquireError = value
		}

	}

	return x, s.Err()