src/main/java/org/apache/commons/net/tftp/TFTPClient.java [157:164]:
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                        if (justStarted) {
                            justStarted = false;
                            if (recdPort == port) { // must not use the control port here
                                final TFTPErrorPacket error = new TFTPErrorPacket(recdAddress, recdPort, TFTPErrorPacket.UNKNOWN_TID, "INCORRECT SOURCE PORT");
                                bufferedSend(error);
                                throw new IOException("Incorrect source port (" + recdPort + ") in request reply.");
                            }
                            hostPort = recdPort;
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src/main/java/org/apache/commons/net/tftp/TFTPClient.java [326:333]:
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                        if (justStarted) {
                            justStarted = false;
                            if (recdPort == port) { // must not use the control port here
                                final TFTPErrorPacket error = new TFTPErrorPacket(recdAddress, recdPort, TFTPErrorPacket.UNKNOWN_TID, "INCORRECT SOURCE PORT");
                                bufferedSend(error);
                                throw new IOException("Incorrect source port (" + recdPort + ") in request reply.");
                            }
                            hostPort = recdPort;
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