mirror of https://github.com/PentHertz/srsLTE.git
Added GTPU PDU Session header parsing
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@ -58,8 +58,11 @@ namespace srsran {
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#define GTPU_MSG_END_MARKER 254
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#define GTPU_MSG_END_MARKER 254
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#define GTPU_MSG_DATA_PDU 255
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#define GTPU_MSG_DATA_PDU 255
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#define GTPU_EXT_NO_MORE_EXTENSION_HEADERS 0x00
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#define GTPU_EXT_HEADER_PDCP_PDU_NUMBER 0b11000000
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#define GTPU_EXT_HEADER_PDCP_PDU_NUMBER 0b11000000
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#define GTPU_EXT_HEADER_PDU_SESSION_CONTAINER 0x85
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#define GTPU_EXT_HEADER_PDU_SESSION_CONTAINER_LEN 4
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struct gtpu_header_t {
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struct gtpu_header_t {
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uint8_t flags = 0;
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uint8_t flags = 0;
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uint8_t message_type = 0;
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uint8_t message_type = 0;
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@ -112,7 +112,9 @@ bool gtpu_read_ext_header(srsran::byte_buffer_t* pdu,
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return true;
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return true;
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}
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}
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if (header->next_ext_hdr_type == GTPU_EXT_HEADER_PDCP_PDU_NUMBER) {
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// TODO: Iterate over next headers until no more extension headers
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switch (header->next_ext_hdr_type) {
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case GTPU_EXT_HEADER_PDCP_PDU_NUMBER:
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pdu->msg += HEADER_PDCP_PDU_NUMBER_SIZE;
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pdu->msg += HEADER_PDCP_PDU_NUMBER_SIZE;
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pdu->N_bytes -= HEADER_PDCP_PDU_NUMBER_SIZE;
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pdu->N_bytes -= HEADER_PDCP_PDU_NUMBER_SIZE;
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header->ext_buffer.resize(HEADER_PDCP_PDU_NUMBER_SIZE);
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header->ext_buffer.resize(HEADER_PDCP_PDU_NUMBER_SIZE);
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@ -120,7 +122,14 @@ bool gtpu_read_ext_header(srsran::byte_buffer_t* pdu,
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header->ext_buffer[i] = **ptr;
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header->ext_buffer[i] = **ptr;
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(*ptr)++;
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(*ptr)++;
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}
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}
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} else {
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break;
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case GTPU_EXT_HEADER_PDU_SESSION_CONTAINER:
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pdu->msg += GTPU_EXT_HEADER_PDU_SESSION_CONTAINER_LEN;
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pdu->N_bytes -= GTPU_EXT_HEADER_PDU_SESSION_CONTAINER_LEN;
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logger.warning("skip parsing of GTPU_EXT_HEADER_PDU_SESSION_CONTAINER");
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// TODO: Save Header Extension
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break;
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default:
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logger.error("gtpu_read_header - Unhandled GTP-U Extension Header Type: 0x%x", header->next_ext_hdr_type);
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logger.error("gtpu_read_header - Unhandled GTP-U Extension Header Type: 0x%x", header->next_ext_hdr_type);
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return false;
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return false;
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}
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}
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