net_xfrm.go

Documentation: github.com/prometheus/procfs

     1  // Copyright 2017 Prometheus Team
     2  // Licensed under the Apache License, Version 2.0 (the "License");
     3  // you may not use this file except in compliance with the License.
     4  // You may obtain a copy of the License at
     5  //
     6  // http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package procfs
    15  
    16  import (
    17  	"bufio"
    18  	"fmt"
    19  	"os"
    20  	"strconv"
    21  	"strings"
    22  )
    23  
    24  // XfrmStat models the contents of /proc/net/xfrm_stat.
    25  type XfrmStat struct {
    26  	// All errors which are not matched by other
    27  	XfrmInError int
    28  	// No buffer is left
    29  	XfrmInBufferError int
    30  	// Header Error
    31  	XfrmInHdrError int
    32  	// No state found
    33  	// i.e. either inbound SPI, address, or IPSEC protocol at SA is wrong
    34  	XfrmInNoStates int
    35  	// Transformation protocol specific error
    36  	// e.g. SA Key is wrong
    37  	XfrmInStateProtoError int
    38  	// Transformation mode specific error
    39  	XfrmInStateModeError int
    40  	// Sequence error
    41  	// e.g. sequence number is out of window
    42  	XfrmInStateSeqError int
    43  	// State is expired
    44  	XfrmInStateExpired int
    45  	// State has mismatch option
    46  	// e.g. UDP encapsulation type is mismatched
    47  	XfrmInStateMismatch int
    48  	// State is invalid
    49  	XfrmInStateInvalid int
    50  	// No matching template for states
    51  	// e.g. Inbound SAs are correct but SP rule is wrong
    52  	XfrmInTmplMismatch int
    53  	// No policy is found for states
    54  	// e.g. Inbound SAs are correct but no SP is found
    55  	XfrmInNoPols int
    56  	// Policy discards
    57  	XfrmInPolBlock int
    58  	// Policy error
    59  	XfrmInPolError int
    60  	// All errors which are not matched by others
    61  	XfrmOutError int
    62  	// Bundle generation error
    63  	XfrmOutBundleGenError int
    64  	// Bundle check error
    65  	XfrmOutBundleCheckError int
    66  	// No state was found
    67  	XfrmOutNoStates int
    68  	// Transformation protocol specific error
    69  	XfrmOutStateProtoError int
    70  	// Transportation mode specific error
    71  	XfrmOutStateModeError int
    72  	// Sequence error
    73  	// i.e sequence number overflow
    74  	XfrmOutStateSeqError int
    75  	// State is expired
    76  	XfrmOutStateExpired int
    77  	// Policy discads
    78  	XfrmOutPolBlock int
    79  	// Policy is dead
    80  	XfrmOutPolDead int
    81  	// Policy Error
    82  	XfrmOutPolError int
    83  	// Forward routing of a packet is not allowed
    84  	XfrmFwdHdrError int
    85  	// State is invalid, perhaps expired
    86  	XfrmOutStateInvalid int
    87  	// State hasn’t been fully acquired before use
    88  	XfrmAcquireError int
    89  }
    90  
    91  // NewXfrmStat reads the xfrm_stat statistics.
    92  func NewXfrmStat() (XfrmStat, error) {
    93  	fs, err := NewFS(DefaultMountPoint)
    94  	if err != nil {
    95  		return XfrmStat{}, err
    96  	}
    97  
    98  	return fs.NewXfrmStat()
    99  }
   100  
   101  // NewXfrmStat reads the xfrm_stat statistics from the 'proc' filesystem.
   102  func (fs FS) NewXfrmStat() (XfrmStat, error) {
   103  	file, err := os.Open(fs.proc.Path("net/xfrm_stat"))
   104  	if err != nil {
   105  		return XfrmStat{}, err
   106  	}
   107  	defer file.Close()
   108  
   109  	var (
   110  		x = XfrmStat{}
   111  		s = bufio.NewScanner(file)
   112  	)
   113  
   114  	for s.Scan() {
   115  		fields := strings.Fields(s.Text())
   116  
   117  		if len(fields) != 2 {
   118  			return XfrmStat{}, fmt.Errorf("%w: %q line %q", ErrFileParse, file.Name(), s.Text())
   119  		}
   120  
   121  		name := fields[0]
   122  		value, err := strconv.Atoi(fields[1])
   123  		if err != nil {
   124  			return XfrmStat{}, err
   125  		}
   126  
   127  		switch name {
   128  		case "XfrmInError":
   129  			x.XfrmInError = value
   130  		case "XfrmInBufferError":
   131  			x.XfrmInBufferError = value
   132  		case "XfrmInHdrError":
   133  			x.XfrmInHdrError = value
   134  		case "XfrmInNoStates":
   135  			x.XfrmInNoStates = value
   136  		case "XfrmInStateProtoError":
   137  			x.XfrmInStateProtoError = value
   138  		case "XfrmInStateModeError":
   139  			x.XfrmInStateModeError = value
   140  		case "XfrmInStateSeqError":
   141  			x.XfrmInStateSeqError = value
   142  		case "XfrmInStateExpired":
   143  			x.XfrmInStateExpired = value
   144  		case "XfrmInStateInvalid":
   145  			x.XfrmInStateInvalid = value
   146  		case "XfrmInTmplMismatch":
   147  			x.XfrmInTmplMismatch = value
   148  		case "XfrmInNoPols":
   149  			x.XfrmInNoPols = value
   150  		case "XfrmInPolBlock":
   151  			x.XfrmInPolBlock = value
   152  		case "XfrmInPolError":
   153  			x.XfrmInPolError = value
   154  		case "XfrmOutError":
   155  			x.XfrmOutError = value
   156  		case "XfrmInStateMismatch":
   157  			x.XfrmInStateMismatch = value
   158  		case "XfrmOutBundleGenError":
   159  			x.XfrmOutBundleGenError = value
   160  		case "XfrmOutBundleCheckError":
   161  			x.XfrmOutBundleCheckError = value
   162  		case "XfrmOutNoStates":
   163  			x.XfrmOutNoStates = value
   164  		case "XfrmOutStateProtoError":
   165  			x.XfrmOutStateProtoError = value
   166  		case "XfrmOutStateModeError":
   167  			x.XfrmOutStateModeError = value
   168  		case "XfrmOutStateSeqError":
   169  			x.XfrmOutStateSeqError = value
   170  		case "XfrmOutStateExpired":
   171  			x.XfrmOutStateExpired = value
   172  		case "XfrmOutPolBlock":
   173  			x.XfrmOutPolBlock = value
   174  		case "XfrmOutPolDead":
   175  			x.XfrmOutPolDead = value
   176  		case "XfrmOutPolError":
   177  			x.XfrmOutPolError = value
   178  		case "XfrmFwdHdrError":
   179  			x.XfrmFwdHdrError = value
   180  		case "XfrmOutStateInvalid":
   181  			x.XfrmOutStateInvalid = value
   182  		case "XfrmAcquireError":
   183  			x.XfrmAcquireError = value
   184  		}
   185  
   186  	}
   187  
   188  	return x, s.Err()
   189  }
   190
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