| 182 | } |
| 183 | |
| 184 | func (d *SFDecoder) getSampleInfo() (uint32, uint32, error) { |
| 185 | var ( |
| 186 | sfType uint32 |
| 187 | sfTypeFormat uint32 |
| 188 | sfTypeEnterprise uint32 |
| 189 | sfDataLength uint32 |
| 190 | |
| 191 | err error |
| 192 | ) |
| 193 | |
| 194 | if err = read(d.reader, &sfType); err != nil { |
| 195 | return 0, 0, err |
| 196 | } |
| 197 | |
| 198 | sfTypeEnterprise = sfType >> 12 // 20 bytes enterprise |
| 199 | sfTypeFormat = sfType & 0xfff // 12 bytes format |
| 200 | |
| 201 | // supports standard sflow data |
| 202 | if sfTypeEnterprise != 0 { |
| 203 | d.reader.Seek(int64(sfDataLength), 1) |
| 204 | return 0, 0, errNoneEnterpriseStandard |
| 205 | } |
| 206 | |
| 207 | if err = read(d.reader, &sfDataLength); err != nil { |
| 208 | return 0, 0, errDataLengthUnknown |
| 209 | } |
| 210 | |
| 211 | return sfTypeFormat, sfDataLength, nil |
| 212 | } |
| 213 | |
| 214 | func (d *SFDecoder) isFilterMatch(f uint32) bool { |
| 215 | for _, v := range d.filter { |