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|
package netlink
import (
"bytes"
"io"
)
type TCPInfo struct {
State uint8
Ca_state uint8
Retransmits uint8
Probes uint8
Backoff uint8
Options uint8
Snd_wscale uint8 // no uint4
Rcv_wscale uint8
Delivery_rate_app_limited uint8
Fastopen_client_fail uint8
Rto uint32
Ato uint32
Snd_mss uint32
Rcv_mss uint32
Unacked uint32
Sacked uint32
Lost uint32
Retrans uint32
Fackets uint32
Last_data_sent uint32
Last_ack_sent uint32
Last_data_recv uint32
Last_ack_recv uint32
Pmtu uint32
Rcv_ssthresh uint32
Rtt uint32
Rttvar uint32
Snd_ssthresh uint32
Snd_cwnd uint32
Advmss uint32
Reordering uint32
Rcv_rtt uint32
Rcv_space uint32
Total_retrans uint32
Pacing_rate uint64
Max_pacing_rate uint64
Bytes_acked uint64 /* RFC4898 tcpEStatsAppHCThruOctetsAcked */
Bytes_received uint64 /* RFC4898 tcpEStatsAppHCThruOctetsReceived */
Segs_out uint32 /* RFC4898 tcpEStatsPerfSegsOut */
Segs_in uint32 /* RFC4898 tcpEStatsPerfSegsIn */
Notsent_bytes uint32
Min_rtt uint32
Data_segs_in uint32 /* RFC4898 tcpEStatsDataSegsIn */
Data_segs_out uint32 /* RFC4898 tcpEStatsDataSegsOut */
Delivery_rate uint64
Busy_time uint64 /* Time (usec) busy sending data */
Rwnd_limited uint64 /* Time (usec) limited by receive window */
Sndbuf_limited uint64 /* Time (usec) limited by send buffer */
Delivered uint32
Delivered_ce uint32
Bytes_sent uint64 /* RFC4898 tcpEStatsPerfHCDataOctetsOut */
Bytes_retrans uint64 /* RFC4898 tcpEStatsPerfOctetsRetrans */
Dsack_dups uint32 /* RFC4898 tcpEStatsStackDSACKDups */
Reord_seen uint32 /* reordering events seen */
Rcv_ooopack uint32 /* Out-of-order packets received */
Snd_wnd uint32 /* peer's advertised receive window after * scaling (bytes) */
}
func checkDeserErr(err error) error {
if err == io.EOF {
return nil
}
return err
}
func (t *TCPInfo) deserialize(b []byte) error {
var err error
rb := bytes.NewBuffer(b)
t.State, err = rb.ReadByte()
if err != nil {
return checkDeserErr(err)
}
t.Ca_state, err = rb.ReadByte()
if err != nil {
return checkDeserErr(err)
}
t.Retransmits, err = rb.ReadByte()
if err != nil {
return checkDeserErr(err)
}
t.Probes, err = rb.ReadByte()
if err != nil {
return checkDeserErr(err)
}
t.Backoff, err = rb.ReadByte()
if err != nil {
return checkDeserErr(err)
}
t.Options, err = rb.ReadByte()
if err != nil {
return checkDeserErr(err)
}
scales, err := rb.ReadByte()
if err != nil {
return checkDeserErr(err)
}
t.Snd_wscale = scales >> 4 // first 4 bits
t.Rcv_wscale = scales & 0xf // last 4 bits
rateLimAndFastOpen, err := rb.ReadByte()
if err != nil {
return checkDeserErr(err)
}
t.Delivery_rate_app_limited = rateLimAndFastOpen >> 7 // get first bit
t.Fastopen_client_fail = rateLimAndFastOpen >> 5 & 3 // get next two bits
next := rb.Next(4)
if len(next) == 0 {
return nil
}
t.Rto = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Ato = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Snd_mss = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Rcv_mss = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Unacked = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Sacked = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Lost = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Retrans = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Fackets = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Last_data_sent = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Last_ack_sent = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Last_data_recv = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Last_ack_recv = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Pmtu = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Rcv_ssthresh = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Rtt = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Rttvar = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Snd_ssthresh = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Snd_cwnd = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Advmss = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Reordering = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Rcv_rtt = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Rcv_space = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Total_retrans = native.Uint32(next)
next = rb.Next(8)
if len(next) == 0 {
return nil
}
t.Pacing_rate = native.Uint64(next)
next = rb.Next(8)
if len(next) == 0 {
return nil
}
t.Max_pacing_rate = native.Uint64(next)
next = rb.Next(8)
if len(next) == 0 {
return nil
}
t.Bytes_acked = native.Uint64(next)
next = rb.Next(8)
if len(next) == 0 {
return nil
}
t.Bytes_received = native.Uint64(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Segs_out = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Segs_in = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Notsent_bytes = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Min_rtt = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Data_segs_in = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Data_segs_out = native.Uint32(next)
next = rb.Next(8)
if len(next) == 0 {
return nil
}
t.Delivery_rate = native.Uint64(next)
next = rb.Next(8)
if len(next) == 0 {
return nil
}
t.Busy_time = native.Uint64(next)
next = rb.Next(8)
if len(next) == 0 {
return nil
}
t.Rwnd_limited = native.Uint64(next)
next = rb.Next(8)
if len(next) == 0 {
return nil
}
t.Sndbuf_limited = native.Uint64(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Delivered = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Delivered_ce = native.Uint32(next)
next = rb.Next(8)
if len(next) == 0 {
return nil
}
t.Bytes_sent = native.Uint64(next)
next = rb.Next(8)
if len(next) == 0 {
return nil
}
t.Bytes_retrans = native.Uint64(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Dsack_dups = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Reord_seen = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Rcv_ooopack = native.Uint32(next)
next = rb.Next(4)
if len(next) == 0 {
return nil
}
t.Snd_wnd = native.Uint32(next)
return nil
}
|
