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srsLTE
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tft: add helper to delete all TFTs for EPS bearer 

when a EPS bearer is removed, all associated TFTs need
to be removed as well.
This commit is contained in:
Andre Puschmann 2021-06-22 15:41:32 +02:00
parent eef9eb80c4
commit 5313fb99d6
2 changed files with 33 additions and 5 deletions
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5
srsue/hdr/stack/upper/tft_packet_filter.h
View File

@ -64,7 +64,7 @@ public:
bool match(const srsran::unique_byte_buffer_t& pdu);
bool filter_contains(uint16_t filtertype);
uint8_t eps_bearer_id{};
uint8_t eps_bearer_id = {};
uint8_t id = {};
uint8_t eval_precedence = {};
uint32_t active_filters = {};
@ -106,9 +106,12 @@ public:
explicit tft_pdu_matcher(srslog::basic_logger& logger) : logger(logger) {}
~tft_pdu_matcher(){};
void reset();
int check_tft_filter_match(const srsran::unique_byte_buffer_t& pdu, uint8_t& eps_bearer_id);
int apply_traffic_flow_template(const uint8_t& erab_id,
const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft);
void delete_tft_for_eps_bearer(const uint8_t eps_bearer_id);
private:
srslog::basic_logger& logger;

33
srsue/src/stack/upper/tft_packet_filter.cc
View File

@ -378,6 +378,11 @@ bool tft_packet_filter_t::match_port(const srsran::unique_byte_buffer_t& pdu)
return true;
}
void tft_pdu_matcher::reset()
{
tft_filter_map.clear();
}
/**
* Checks whether the provided PDU matches any configured TFT.
* If it finds a match, it updates the eps_bearer_id parameter.
@ -399,15 +404,35 @@ int tft_pdu_matcher::check_tft_filter_match(const srsran::unique_byte_buffer_t&
return SRSRAN_ERROR;
}
int tft_pdu_matcher::apply_traffic_flow_template(const uint8_t& erab_id,
/**
* @brief Deletes all registered TFT for a given EPS bearer ID
*
* @param eps_bearer_id The EPS bearer ID
*/
void tft_pdu_matcher::delete_tft_for_eps_bearer(const uint8_t eps_bearer_id)
{
std::lock_guard<std::mutex> lock(tft_mutex);
auto old_filter = std::find_if(
tft_filter_map.begin(), tft_filter_map.end(), [&](const std::pair<uint16_t, tft_packet_filter_t>& filter) {
return filter.second.eps_bearer_id == eps_bearer_id;
});
if (old_filter != tft_filter_map.end()) {
logger.debug("Deleting TFT for EPS bearer %d", eps_bearer_id);
tft_filter_map.erase(old_filter);
}
}
int tft_pdu_matcher::apply_traffic_flow_template(const uint8_t& eps_bearer_id,
const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft)
{
std::lock_guard<std::mutex> lock(tft_mutex);
switch (tft->tft_op_code) {
case LIBLTE_MME_TFT_OPERATION_CODE_CREATE_NEW_TFT:
for (int i = 0; i < tft->packet_filter_list_size; i++) {
logger.info("New packet filter for TFT");
tft_packet_filter_t filter(erab_id, tft->packet_filter_list[i], logger);
logger.info("New TFT for eps_bearer_id=%d, eval_precedence=%d",
eps_bearer_id,
tft->packet_filter_list[i].eval_precedence);
tft_packet_filter_t filter(eps_bearer_id, tft->packet_filter_list[i], logger);
auto it = tft_filter_map.insert(std::make_pair(filter.eval_precedence, filter));
if (it.second == false) {
logger.error("Error inserting TFT Packet Filter");
@ -431,7 +456,7 @@ int tft_pdu_matcher::apply_traffic_flow_template(const uint8_t&
tft_filter_map.erase(old_filter);
// Add new filter
tft_packet_filter_t new_filter(erab_id, tft->packet_filter_list[i], logger);
tft_packet_filter_t new_filter(eps_bearer_id, tft->packet_filter_list[i], logger);
auto it = tft_filter_map.insert(std::make_pair(new_filter.eval_precedence, new_filter));
if (it.second == false) {
logger.error("Error inserting TFT Packet Filter");