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@ -133,20 +133,21 @@ void pdcp_entity_lte::write_sdu(unique_byte_buffer_t sdu, bool blocking)
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// RLC interface
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void pdcp_entity_lte::write_pdu(unique_byte_buffer_t pdu)
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{
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// Sanity check
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if (pdu->N_bytes <= cfg.hdr_len_bytes) {
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log->error("PDCP PDU smaller than required header size.\n");
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return;
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}
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log->info_hex(pdu->msg,
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pdu->N_bytes,
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"RX %s PDU (%d B), integrity=%s, encryption=%s",
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"%s Rx PDU SN=%d (%d B, integrity=%s, encryption=%s)",
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rrc->get_rb_name(lcid).c_str(),
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read_data_header(pdu),
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pdu->N_bytes,
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srslte_direction_text[integrity_direction],
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srslte_direction_text[encryption_direction]);
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// Sanity check
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if (pdu->N_bytes <= cfg.hdr_len_bytes) {
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log->error("PDCP PDU smaller than required header size.\n");
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return;
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}
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if (is_srb()) {
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handle_srb_pdu(std::move(pdu));
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} else if (is_drb() && rlc->rb_is_um(lcid)) {
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@ -165,9 +166,7 @@ void pdcp_entity_lte::write_pdu(unique_byte_buffer_t pdu)
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// SRBs (5.1.2.2)
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void pdcp_entity_lte::handle_srb_pdu(srslte::unique_byte_buffer_t pdu)
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{
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log->info_hex(pdu->msg, pdu->N_bytes, "RX %s PDU", rrc->get_rb_name(lcid).c_str());
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// Read recvd SN from header
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// Read SN from header
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uint32_t sn = read_data_header(pdu);
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log->debug("RX SRB PDU. Next_PDCP_RX_SN %d, SN %d", next_pdcp_rx_sn, sn);
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@ -180,10 +179,10 @@ void pdcp_entity_lte::handle_srb_pdu(srslte::unique_byte_buffer_t pdu)
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count = COUNT(rx_hfn, sn);
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}
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// Perform decription
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// Perform decryption
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if (encryption_direction == DIRECTION_RX || encryption_direction == DIRECTION_TXRX) {
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cipher_decrypt(&pdu->msg[cfg.hdr_len_bytes], pdu->N_bytes - cfg.hdr_len_bytes, count, &pdu->msg[cfg.hdr_len_bytes]);
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log->info_hex(pdu->msg, pdu->N_bytes, "RX %s PDU (decrypted)", rrc->get_rb_name(lcid).c_str());
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log->info_hex(pdu->msg, pdu->N_bytes, "%s Rx PDU (decrypted)", rrc->get_rb_name(lcid).c_str());
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}
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// Extract MAC
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@ -213,9 +212,8 @@ void pdcp_entity_lte::handle_srb_pdu(srslte::unique_byte_buffer_t pdu)
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}
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// Pass to upper layers
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log->info_hex(pdu->msg, pdu->N_bytes, "Passing SDU to upper layers");
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log->debug_hex(pdu->msg, pdu->N_bytes, "Passing SDU to upper layers");
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rrc->write_pdu(lcid, std::move(pdu));
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return;
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}
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// DRBs mapped on RLC UM (5.1.2.1.3)
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@ -231,7 +229,7 @@ void pdcp_entity_lte::handle_um_drb_pdu(srslte::unique_byte_buffer_t pdu)
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uint32_t count = (rx_hfn << cfg.sn_len) | sn;
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if (encryption_direction == DIRECTION_RX || encryption_direction == DIRECTION_TXRX) {
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cipher_decrypt(pdu->msg, pdu->N_bytes, count, pdu->msg);
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log->debug_hex(pdu->msg, pdu->N_bytes, "RX %s PDU (decrypted)", rrc->get_rb_name(lcid).c_str());
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log->debug_hex(pdu->msg, pdu->N_bytes, "%s Rx PDU (decrypted)", rrc->get_rb_name(lcid).c_str());
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}
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next_pdcp_rx_sn = sn + 1;
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@ -241,7 +239,7 @@ void pdcp_entity_lte::handle_um_drb_pdu(srslte::unique_byte_buffer_t pdu)
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}
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// Pass to upper layers
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log->info_hex(pdu->msg, pdu->N_bytes, "RX %s PDU SN=%d", rrc->get_rb_name(lcid).c_str(), sn);
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log->info_hex(pdu->msg, pdu->N_bytes, "%s Rx PDU SN=%d", rrc->get_rb_name(lcid).c_str(), sn);
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gw->write_pdu(lcid, std::move(pdu));
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}
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@ -295,15 +293,14 @@ void pdcp_entity_lte::handle_am_drb_pdu(srslte::unique_byte_buffer_t pdu)
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// Decrypt
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cipher_decrypt(pdu->msg, pdu->N_bytes, count, pdu->msg);
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log->debug_hex(pdu->msg, pdu->N_bytes, "RX %s PDU (decrypted)", rrc->get_rb_name(lcid).c_str());
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log->debug_hex(pdu->msg, pdu->N_bytes, "%s Rx PDU (decrypted)", rrc->get_rb_name(lcid).c_str());
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// Update info on last PDU submitted to upper layers
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last_submitted_pdcp_rx_sn = sn;
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// Pass to upper layers
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log->info_hex(pdu->msg, pdu->N_bytes, "RX %s PDU SN=%d", rrc->get_rb_name(lcid).c_str(), sn);
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log->info_hex(pdu->msg, pdu->N_bytes, "%s Rx PDU SN=%d", rrc->get_rb_name(lcid).c_str(), sn);
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gw->write_pdu(lcid, std::move(pdu));
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return;
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}
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/****************************************************************************
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