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90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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#ifndef SRSRAN_TEST_PCAP_H
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#define SRSRAN_TEST_PCAP_H
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/**
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* @brief Helper class for tests that wish to dump RRC, PDCP or MAC SDUs into PCAP files in order to inspect them with
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* Wireshark.
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*
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* Depending on the layer of interest, the class adds the protocol header for the layers below so that Wireshark can
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* disect them. For RRC for example, both PDCP and RLC AM dummy headers are added.
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*
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* There is an EUTRA and NR version for the helper methods.
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*
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*/
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#include "srsran/common/mac_pcap.h"
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#include "srsran/mac/mac_sch_pdu_nr.h"
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static std::unique_ptr<srsran::mac_pcap> pcap_handle = nullptr;
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#define PCAP_CRNTI (0x1001)
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#define PCAP_TTI (666)
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namespace srsran {
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/**
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* @brief Writes a MAC SDU of a gives LCID for NR
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*
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* @param lcid The logical channel ID of the SDU
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* @param payload Pointer to payload
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* @param len Length
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* @return int
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*/
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int write_mac_sdu_nr(const uint32_t lcid, const uint8_t* payload, const uint32_t len)
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{
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if (pcap_handle) {
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byte_buffer_t tx_buffer;
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srsran::mac_sch_pdu_nr tx_pdu;
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tx_pdu.init_tx(&tx_buffer, len + 10);
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tx_pdu.add_sdu(lcid, payload, len);
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tx_pdu.pack();
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pcap_handle->write_dl_crnti_nr(tx_buffer.msg, tx_buffer.N_bytes, PCAP_CRNTI, 0, PCAP_TTI);
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return SRSRAN_SUCCESS;
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}
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return SRSRAN_ERROR;
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}
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/**
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* @brief Writes a PDCP SDU (e.g. RRC DL-DCCH PDU)
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*
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* Both PDCP and RLC AM header (dummy for SN=0) are added.
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*
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* @param lcid The logical channel ID of the SDU
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* @param payload Pointer to payload
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* @param len Length
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* @return int
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*/
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int write_pdcp_sdu_nr(const uint32_t lcid, const uint8_t* payload, const uint32_t len)
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{
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if (pcap_handle) {
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byte_buffer_t mac_sdu;
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// Add dummy RLC AM PDU header
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mac_sdu.msg[0] = 0x80;
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mac_sdu.msg[1] = 0x00;
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// Add dummy PDCP header
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mac_sdu.msg[2] = 0x00;
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mac_sdu.msg[3] = 0x00;
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mac_sdu.N_bytes = 4;
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memcpy(mac_sdu.msg + 4, payload, len);
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mac_sdu.N_bytes += len;
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return write_mac_sdu_nr(lcid, mac_sdu.msg, mac_sdu.N_bytes);
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}
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return SRSRAN_ERROR;
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}
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} // namespace srsran
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#endif // SRSRAN_TEST_COMMON_H
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