src/main/java/org/apache/commons/net/tftp/TFTPClient.java [210:221]:
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                        } else { // incorrect host or TID
                            final TFTPErrorPacket error = new TFTPErrorPacket(recdAddress, recdPort, TFTPErrorPacket.UNKNOWN_TID, "Unexpected host or port.");
                            bufferedSend(error);
                        }
                    } catch (final SocketException | InterruptedIOException e) {
                        if (++timeouts >= maxTimeouts) {
                            throw new IOException("Connection timed out.");
                        }
                    } catch (final TFTPPacketException e) {
                        throw new IOException("Bad packet: " + e.getMessage());
                    }
                } while (wantReply); // waiting for response
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src/main/java/org/apache/commons/net/tftp/TFTPClient.java [367:379]:
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                        } else { // wrong host or TID; send error
                            final TFTPErrorPacket error = new TFTPErrorPacket(recdAddress, recdPort, TFTPErrorPacket.UNKNOWN_TID, "Unexpected host or port.");
                            bufferedSend(error);
                        }
                    } catch (final SocketException | InterruptedIOException e) {
                        if (++timeouts >= maxTimeouts) {
                            throw new IOException("Connection timed out.");
                        }
                    } catch (final TFTPPacketException e) {
                        throw new IOException("Bad packet: " + e.getMessage());
                    }
                    // retry until a good ack
                } while (wantReply);
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