|
| 1 | +// Copyright The OpenTelemetry Authors |
| 2 | +// SPDX-License-Identifier: Apache-2.0 |
| 3 | + |
| 4 | +package transport // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/statsdreceiver/internal/transport" |
| 5 | + |
| 6 | +import ( |
| 7 | + "errors" |
| 8 | + "net" |
| 9 | + |
| 10 | + "go.opentelemetry.io/collector/consumer" |
| 11 | +) |
| 12 | + |
| 13 | +type packetServer struct { |
| 14 | + packetConn net.PacketConn |
| 15 | + transport Transport |
| 16 | +} |
| 17 | + |
| 18 | +// ListenAndServe starts the server ready to receive metrics. |
| 19 | +func (u *packetServer) ListenAndServe( |
| 20 | + nextConsumer consumer.Metrics, |
| 21 | + reporter Reporter, |
| 22 | + transferChan chan<- Metric, |
| 23 | +) error { |
| 24 | + if nextConsumer == nil || reporter == nil { |
| 25 | + return errNilListenAndServeParameters |
| 26 | + } |
| 27 | + |
| 28 | + buf := make([]byte, 65527) // max size for udp packet body (assuming ipv6) |
| 29 | + for { |
| 30 | + n, addr, err := u.packetConn.ReadFrom(buf) |
| 31 | + if addr == nil && u.transport == UDS { |
| 32 | + addr = &udsAddr{ |
| 33 | + network: u.transport.String(), |
| 34 | + address: u.packetConn.LocalAddr().String(), |
| 35 | + } |
| 36 | + } |
| 37 | + |
| 38 | + if n > 0 { |
| 39 | + u.handlePacket(n, buf, addr, transferChan) |
| 40 | + } |
| 41 | + if err != nil { |
| 42 | + reporter.OnDebugf("%s Transport (%s) - ReadFrom error: %v", |
| 43 | + u.transport, |
| 44 | + u.packetConn.LocalAddr(), |
| 45 | + err) |
| 46 | + var netErr net.Error |
| 47 | + if errors.As(err, &netErr) { |
| 48 | + if netErr.Timeout() { |
| 49 | + continue |
| 50 | + } |
| 51 | + } |
| 52 | + return err |
| 53 | + } |
| 54 | + } |
| 55 | +} |
| 56 | + |
| 57 | +// handlePacket is helper that parses the buffer and split it line by line to be parsed upstream. |
| 58 | +func (u *packetServer) handlePacket( |
| 59 | + numBytes int, |
| 60 | + data []byte, |
| 61 | + addr net.Addr, |
| 62 | + transferChan chan<- Metric, |
| 63 | +) { |
| 64 | + splitPacket := NewSplitBytes(data[:numBytes], '\n') |
| 65 | + for splitPacket.Next() { |
| 66 | + chunk := splitPacket.Chunk() |
| 67 | + if len(chunk) > 0 { |
| 68 | + transferChan <- Metric{string(chunk), addr} |
| 69 | + } |
| 70 | + } |
| 71 | +} |
| 72 | + |
| 73 | +type udsAddr struct { |
| 74 | + network string |
| 75 | + address string |
| 76 | +} |
| 77 | + |
| 78 | +func (u *udsAddr) Network() string { |
| 79 | + return u.network |
| 80 | +} |
| 81 | + |
| 82 | +func (u *udsAddr) String() string { |
| 83 | + return u.address |
| 84 | +} |
0 commit comments