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net_linux.go
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net_linux.go
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// +build linux
package net
import (
"errors"
"strconv"
"strings"
"github.com/codeskyblue/gopsutil/internal/common"
)
// NetIOCounters returnes network I/O statistics for every network
// interface installed on the system. If pernic argument is false,
// return only sum of all information (which name is 'all'). If true,
// every network interface installed on the system is returned
// separately.
func NetIOCounters(pernic bool) ([]NetIOCountersStat, error) {
filename := common.HostProc("net/dev")
lines, err := common.ReadLines(filename)
if err != nil {
return nil, err
}
statlen := len(lines) - 1
ret := make([]NetIOCountersStat, 0, statlen)
for _, line := range lines[2:] {
parts := strings.SplitN(line, ":", 2)
if len(parts) != 2 {
continue
}
interfaceName := strings.TrimSpace(parts[0])
if interfaceName == "" {
continue
}
fields := strings.Fields(strings.TrimSpace(parts[1]))
bytesRecv, err := strconv.ParseUint(fields[0], 10, 64)
if err != nil {
return ret, err
}
packetsRecv, err := strconv.ParseUint(fields[1], 10, 64)
if err != nil {
return ret, err
}
errIn, err := strconv.ParseUint(fields[2], 10, 64)
if err != nil {
return ret, err
}
dropIn, err := strconv.ParseUint(fields[3], 10, 64)
if err != nil {
return ret, err
}
bytesSent, err := strconv.ParseUint(fields[8], 10, 64)
if err != nil {
return ret, err
}
packetsSent, err := strconv.ParseUint(fields[9], 10, 64)
if err != nil {
return ret, err
}
errOut, err := strconv.ParseUint(fields[10], 10, 64)
if err != nil {
return ret, err
}
dropOut, err := strconv.ParseUint(fields[13], 10, 64)
if err != nil {
return ret, err
}
nic := NetIOCountersStat{
Name: interfaceName,
BytesRecv: bytesRecv,
PacketsRecv: packetsRecv,
Errin: errIn,
Dropin: dropIn,
BytesSent: bytesSent,
PacketsSent: packetsSent,
Errout: errOut,
Dropout: dropOut,
}
ret = append(ret, nic)
}
if pernic == false {
return getNetIOCountersAll(ret)
}
return ret, nil
}
var netProtocols = []string{
"ip",
"icmp",
"icmpmsg",
"tcp",
"udp",
"udplite",
}
// NetProtoCounters returns network statistics for the entire system
// If protocols is empty then all protocols are returned, otherwise
// just the protocols in the list are returned.
// Available protocols:
// ip,icmp,icmpmsg,tcp,udp,udplite
func NetProtoCounters(protocols []string) ([]NetProtoCountersStat, error) {
if len(protocols) == 0 {
protocols = netProtocols
}
stats := make([]NetProtoCountersStat, 0, len(protocols))
protos := make(map[string]bool, len(protocols))
for _, p := range protocols {
protos[p] = true
}
filename := "/proc/net/snmp"
lines, err := common.ReadLines(filename)
if err != nil {
return nil, err
}
linecount := len(lines)
for i := 0; i < linecount; i++ {
line := lines[i]
r := strings.IndexRune(line, ':')
if r == -1 {
return nil, errors.New(filename + " is not fomatted correctly, expected ':'.")
}
proto := strings.ToLower(line[:r])
if !protos[proto] {
// skip protocol and data line
i++
continue
}
// Read header line
statNames := strings.Split(line[r+2:], " ")
// Read data line
i++
statValues := strings.Split(lines[i][r+2:], " ")
if len(statNames) != len(statValues) {
return nil, errors.New(filename + " is not fomatted correctly, expected same number of columns.")
}
stat := NetProtoCountersStat{
Protocol: proto,
Stats: make(map[string]int64, len(statNames)),
}
for j := range statNames {
value, err := strconv.ParseInt(statValues[j], 10, 64)
if err != nil {
return nil, err
}
stat.Stats[statNames[j]] = value
}
stats = append(stats, stat)
}
return stats, nil
}