diff options
Diffstat (limited to 'vendor/github.com/prometheus/procfs/net_udp.go')
| -rw-r--r-- | vendor/github.com/prometheus/procfs/net_udp.go | 183 |
1 files changed, 9 insertions, 174 deletions
diff --git a/vendor/github.com/prometheus/procfs/net_udp.go b/vendor/github.com/prometheus/procfs/net_udp.go index d017e3f18..9ac3daf2d 100644 --- a/vendor/github.com/prometheus/procfs/net_udp.go +++ b/vendor/github.com/prometheus/procfs/net_udp.go @@ -13,58 +13,14 @@ package procfs -import ( - "bufio" - "encoding/hex" - "fmt" - "io" - "net" - "os" - "strconv" - "strings" -) - -const ( - // readLimit is used by io.LimitReader while reading the content of the - // /proc/net/udp{,6} files. The number of lines inside such a file is dynamic - // as each line represents a single used socket. - // In theory, the number of available sockets is 65535 (2^16 - 1) per IP. - // With e.g. 150 Byte per line and the maximum number of 65535, - // the reader needs to handle 150 Byte * 65535 =~ 10 MB for a single IP. - readLimit = 4294967296 // Byte -> 4 GiB -) - type ( // NetUDP represents the contents of /proc/net/udp{,6} file without the header. - NetUDP []*netUDPLine + NetUDP []*netIPSocketLine // NetUDPSummary provides already computed values like the total queue lengths or // the total number of used sockets. In contrast to NetUDP it does not collect // the parsed lines into a slice. - NetUDPSummary struct { - // TxQueueLength shows the total queue length of all parsed tx_queue lengths. - TxQueueLength uint64 - // RxQueueLength shows the total queue length of all parsed rx_queue lengths. - RxQueueLength uint64 - // UsedSockets shows the total number of parsed lines representing the - // number of used sockets. - UsedSockets uint64 - } - - // netUDPLine represents the fields parsed from a single line - // in /proc/net/udp{,6}. Fields which are not used by UDP are skipped. - // For the proc file format details, see https://linux.die.net/man/5/proc. - netUDPLine struct { - Sl uint64 - LocalAddr net.IP - LocalPort uint64 - RemAddr net.IP - RemPort uint64 - St uint64 - TxQueue uint64 - RxQueue uint64 - UID uint64 - } + NetUDPSummary NetIPSocketSummary ) // NetUDP returns the IPv4 kernel/networking statistics for UDP datagrams @@ -93,137 +49,16 @@ func (fs FS) NetUDP6Summary() (*NetUDPSummary, error) { // newNetUDP creates a new NetUDP{,6} from the contents of the given file. func newNetUDP(file string) (NetUDP, error) { - f, err := os.Open(file) - if err != nil { - return nil, err - } - defer f.Close() - - netUDP := NetUDP{} - - lr := io.LimitReader(f, readLimit) - s := bufio.NewScanner(lr) - s.Scan() // skip first line with headers - for s.Scan() { - fields := strings.Fields(s.Text()) - line, err := parseNetUDPLine(fields) - if err != nil { - return nil, err - } - netUDP = append(netUDP, line) - } - if err := s.Err(); err != nil { - return nil, err - } - return netUDP, nil + n, err := newNetIPSocket(file) + n1 := NetUDP(n) + return n1, err } -// newNetUDPSummary creates a new NetUDP{,6} from the contents of the given file. func newNetUDPSummary(file string) (*NetUDPSummary, error) { - f, err := os.Open(file) - if err != nil { - return nil, err - } - defer f.Close() - - netUDPSummary := &NetUDPSummary{} - - lr := io.LimitReader(f, readLimit) - s := bufio.NewScanner(lr) - s.Scan() // skip first line with headers - for s.Scan() { - fields := strings.Fields(s.Text()) - line, err := parseNetUDPLine(fields) - if err != nil { - return nil, err - } - netUDPSummary.TxQueueLength += line.TxQueue - netUDPSummary.RxQueueLength += line.RxQueue - netUDPSummary.UsedSockets++ - } - if err := s.Err(); err != nil { + n, err := newNetIPSocketSummary(file) + if n == nil { return nil, err } - return netUDPSummary, nil -} - -// parseNetUDPLine parses a single line, represented by a list of fields. -func parseNetUDPLine(fields []string) (*netUDPLine, error) { - line := &netUDPLine{} - if len(fields) < 8 { - return nil, fmt.Errorf( - "cannot parse net udp socket line as it has less then 8 columns: %s", - strings.Join(fields, " "), - ) - } - var err error // parse error - - // sl - s := strings.Split(fields[0], ":") - if len(s) != 2 { - return nil, fmt.Errorf( - "cannot parse sl field in udp socket line: %s", fields[0]) - } - - if line.Sl, err = strconv.ParseUint(s[0], 0, 64); err != nil { - return nil, fmt.Errorf("cannot parse sl value in udp socket line: %s", err) - } - // local_address - l := strings.Split(fields[1], ":") - if len(l) != 2 { - return nil, fmt.Errorf( - "cannot parse local_address field in udp socket line: %s", fields[1]) - } - if line.LocalAddr, err = hex.DecodeString(l[0]); err != nil { - return nil, fmt.Errorf( - "cannot parse local_address value in udp socket line: %s", err) - } - if line.LocalPort, err = strconv.ParseUint(l[1], 16, 64); err != nil { - return nil, fmt.Errorf( - "cannot parse local_address port value in udp socket line: %s", err) - } - - // remote_address - r := strings.Split(fields[2], ":") - if len(r) != 2 { - return nil, fmt.Errorf( - "cannot parse rem_address field in udp socket line: %s", fields[1]) - } - if line.RemAddr, err = hex.DecodeString(r[0]); err != nil { - return nil, fmt.Errorf( - "cannot parse rem_address value in udp socket line: %s", err) - } - if line.RemPort, err = strconv.ParseUint(r[1], 16, 64); err != nil { - return nil, fmt.Errorf( - "cannot parse rem_address port value in udp socket line: %s", err) - } - - // st - if line.St, err = strconv.ParseUint(fields[3], 16, 64); err != nil { - return nil, fmt.Errorf( - "cannot parse st value in udp socket line: %s", err) - } - - // tx_queue and rx_queue - q := strings.Split(fields[4], ":") - if len(q) != 2 { - return nil, fmt.Errorf( - "cannot parse tx/rx queues in udp socket line as it has a missing colon: %s", - fields[4], - ) - } - if line.TxQueue, err = strconv.ParseUint(q[0], 16, 64); err != nil { - return nil, fmt.Errorf("cannot parse tx_queue value in udp socket line: %s", err) - } - if line.RxQueue, err = strconv.ParseUint(q[1], 16, 64); err != nil { - return nil, fmt.Errorf("cannot parse rx_queue value in udp socket line: %s", err) - } - - // uid - if line.UID, err = strconv.ParseUint(fields[7], 0, 64); err != nil { - return nil, fmt.Errorf( - "cannot parse uid value in udp socket line: %s", err) - } - - return line, nil + n1 := NetUDPSummary(*n) + return &n1, err } |