mirror of https://github.com/PentHertz/srsLTE.git
Added EPS bearer id to apply_tft interface. Sending packets to the correct LCID if they match the packet filter.
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657ef090a2
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2723aa9b12
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@ -98,7 +98,8 @@ class gw_interface_nas
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{
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public:
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virtual int setup_if_addr(uint32_t lcid, uint8_t pdn_type, uint32_t ip_addr, uint8_t* ipv6_if_id, char* err_str) = 0;
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virtual int apply_traffic_flow_template(const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft) = 0;
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virtual int apply_traffic_flow_template(uint8_t eps_bearer_id,
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const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft) = 0;
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};
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// GW interface for RRC
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@ -60,7 +60,7 @@ public:
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// NAS interface
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int setup_if_addr(uint32_t lcid, uint8_t pdn_type, uint32_t ip_addr, uint8_t* ipv6_if_addr, char* err_str);
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int apply_traffic_flow_template(const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft);
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int apply_traffic_flow_template(uint8_t eps_bearer_id, const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft);
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// RRC interface
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void add_mch_port(uint32_t lcid, uint32_t port);
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@ -65,9 +65,10 @@ const uint8_t TCP_PROTOCOL = 0x06;
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class tft_packet_filter_t
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{
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public:
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tft_packet_filter_t(const LIBLTE_MME_PACKET_FILTER_STRUCT& tft);
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tft_packet_filter_t(uint8_t eps_bearer_id, const LIBLTE_MME_PACKET_FILTER_STRUCT& tft);
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bool match(const srslte::unique_byte_buffer_t& pdu);
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uint8_t eps_bearer_id;
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uint8_t id;
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uint8_t eval_precedence;
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uint16_t active_filters;
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@ -82,8 +83,9 @@ public:
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uint16_t single_remote_port;
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uint16_t remote_port_range[2];
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uint32_t security_parameter_index;
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uint32_t type_of_service;
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uint8_t flow_label[3];
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uint8_t type_of_service;
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uint8_t type_of_service_mask;
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uint8_t flow_label[3];
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bool match_ip(const srslte::unique_byte_buffer_t& pdu);
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bool match_protocol(const srslte::unique_byte_buffer_t& pdu);
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@ -219,8 +219,7 @@ int gw::setup_if_addr(uint32_t lcid, uint8_t pdn_type, uint32_t ip_addr, uint8_t
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return SRSLTE_SUCCESS;
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}
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int gw::apply_traffic_flow_template(const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft)
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int gw::apply_traffic_flow_template(uint8_t erab_id, const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft)
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{
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int err;
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switch (tft->tft_op_code) {
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@ -228,7 +227,7 @@ int gw::apply_traffic_flow_template(const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUC
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gw_log->console("Adding new TFT\n");
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for (int i = 0; i < tft->packet_filter_list_size; i++) {
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gw_log->console("New packet filter for TFT\n");
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tft_packet_filter_t filter(tft->packet_filter_list[i]);
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tft_packet_filter_t filter(erab_id, tft->packet_filter_list[i]);
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auto it = tft_filter_map.insert(std::make_pair(filter.eval_precedence, filter));
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if(it.second == false){
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gw_log->error("Error inserting TFT Packet Filter\n");
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@ -319,14 +318,12 @@ void gw::run_thread()
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break;
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}
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// Check to which LCID to send the packet
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uint8_t lcid = check_tft_filter_match(pdu);
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// Send PDU directly to PDCP
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if (pdcp->is_lcid_enabled(default_lcid)) {
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if (pdcp->is_lcid_enabled(lcid)) {
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pdu->set_timestamp();
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ul_tput_bytes += pdu->N_bytes;
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pdcp->write_sdu(default_lcid, std::move(pdu), false);
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pdcp->write_sdu(lcid, std::move(pdu), false);
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do {
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pdu = srslte::allocate_unique_buffer(*pool);
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if (!pdu) {
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@ -359,7 +356,11 @@ uint8_t gw::check_tft_filter_match(const srslte::unique_byte_buffer_t& pdu) {
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if(!tft_filter_map.empty()){
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for (std::pair<const uint16_t, tft_packet_filter_t>& filter_pair : tft_filter_map) {
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bool match = filter_pair.second.match(pdu);
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gw_log->console("Found filter match\n");
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if (match) {
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lcid = filter_pair.second.eps_bearer_id - 2;
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gw_log->console("Found filter match -- EPS bearer Id %d, LCID %d\n", filter_pair.second.eps_bearer_id, lcid);
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break;
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}
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}
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}
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return lcid;
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@ -1164,7 +1164,7 @@ void nas::parse_activate_dedicated_eps_bearer_context_request(uint32_t lcid, uni
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}
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// apply packet filters to GW
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gw->apply_traffic_flow_template(tft);
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gw->apply_traffic_flow_template(request.eps_bearer_id, tft);
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send_activate_dedicated_eps_bearer_context_accept(request.proc_transaction_id, request.eps_bearer_id);
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}
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@ -26,7 +26,8 @@
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namespace srsue {
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tft_packet_filter_t::tft_packet_filter_t(const LIBLTE_MME_PACKET_FILTER_STRUCT& tft) :
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tft_packet_filter_t::tft_packet_filter_t(uint8_t eps_bearer_id, const LIBLTE_MME_PACKET_FILTER_STRUCT& tft) :
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eps_bearer_id(eps_bearer_id),
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id(tft.id),
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eval_precedence(tft.eval_precedence),
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active_filters(0)
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@ -77,6 +78,8 @@ tft_packet_filter_t::tft_packet_filter_t(const LIBLTE_MME_PACKET_FILTER_STRUCT&
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active_filters = TYPE_OF_SERVICE_FLAG;
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memcpy(&type_of_service, &tft.filter[idx], 1);
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idx += 1;
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memcpy(&type_of_service_mask, &tft.filter[idx], 1);
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idx += 1;
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break;
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//Flow label
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case FLOW_LABEL_TYPE:
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@ -113,6 +116,7 @@ bool tft_packet_filter_t::match(const srslte::unique_byte_buffer_t& pdu)
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// Check Type of Service/Traffic class
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if (!match_type_of_service(pdu)) {
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printf("still not matching\n");
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return false;
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}
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@ -177,8 +181,12 @@ bool tft_packet_filter_t::match_type_of_service(const srslte::unique_byte_buffer
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if (ip_pkt->version == 4 && (active_filters & TYPE_OF_SERVICE_FLAG)) {
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// Check match on IPv4 packet
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if (ip_pkt->tos != type_of_service) {
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printf("not matching!\n");
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return false;
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}
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} else if (ip_pkt->version == 6 && (active_filters & TYPE_OF_SERVICE_FLAG)) {
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// IPv6 traffic class not supported yet
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return false;
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}
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return true;
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}
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@ -202,17 +210,10 @@ bool tft_packet_filter_t::match_port(const srslte::unique_byte_buffer_t& pdu)
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struct ipv6hdr* ip6_pkt = (struct ipv6hdr*)pdu->msg;
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struct udphdr* udp_pkt;
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// LOCAL_PORT_RANGE_FLAG
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// SINGLE_REMOTE_PORT_FLAG
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// REMOTE_PORT_RANGE_FLAG
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if (ip_pkt->version == 4) {
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switch (ip_pkt->protocol) {
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case UDP_PROTOCOL:
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printf("UDP protocol\n");
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udp_pkt = (struct udphdr*)&pdu->msg[ip_pkt->ihl * 4];
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printf("%d\n", ntohs(udp_pkt->source));
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printf("%d\n", ntohs(udp_pkt->dest));
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if (active_filters & SINGLE_LOCAL_PORT_FLAG) {
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if (udp_pkt->source != single_local_port) {
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return false;
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@ -225,10 +226,8 @@ bool tft_packet_filter_t::match_port(const srslte::unique_byte_buffer_t& pdu)
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}
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break;
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case TCP_PROTOCOL:
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printf("TCP protocol\n");
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break;
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return false;
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default:
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printf("Unhandled protocol\n");
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return false;
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}
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}
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@ -143,7 +143,10 @@ class gw_dummy : public gw_interface_nas, public gw_interface_pdcp
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{
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return SRSLTE_SUCCESS;
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}
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int apply_traffic_flow_template(const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft) { return SRSLTE_SUCCESS; }
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int apply_traffic_flow_template(uint8_t eps_bearer_id, const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft)
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{
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return SRSLTE_SUCCESS;
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}
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void write_pdu(uint32_t lcid, unique_byte_buffer_t pdu) {}
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void write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t sdu) {}
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};
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@ -63,6 +63,8 @@ uint8_t ip_tst_message2[] = {
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0x88, 0x29, 0x60, 0x02, 0xde, 0x41, 0x11, 0xc2, 0xaa, 0x5e, 0x9e, 0x27, 0x74, 0xa5, 0xd3, 0x19};
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uint32_t ip_message_len2 = sizeof(ip_tst_message2);
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#define EPS_BEARER_ID 6
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int tft_filter_test_single_local_port()
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{
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srslte::log_filter log1("TFT");
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@ -102,7 +104,7 @@ int tft_filter_test_single_local_port()
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packet_filter.filter_size = 3;
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memcpy(packet_filter.filter, filter_message, 3);
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srsue::tft_packet_filter_t filter(packet_filter);
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srsue::tft_packet_filter_t filter(EPS_BEARER_ID, packet_filter);
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// Check filter
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TESTASSERT(filter.match(ip_msg1));
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@ -150,7 +152,7 @@ int tft_filter_test_single_remote_port()
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packet_filter.filter_size = 3;
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memcpy(packet_filter.filter, filter_message, 3);
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srsue::tft_packet_filter_t filter(packet_filter);
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srsue::tft_packet_filter_t filter(EPS_BEARER_ID, packet_filter);
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// Check filter
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TESTASSERT(filter.match(ip_msg1));
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@ -199,7 +201,7 @@ int tft_filter_test_ipv4_local_addr()
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packet_filter.filter_size = filter_size;
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memcpy(packet_filter.filter, filter_message, filter_size);
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srsue::tft_packet_filter_t filter(packet_filter);
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srsue::tft_packet_filter_t filter(EPS_BEARER_ID, packet_filter);
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// Check filter
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TESTASSERT(filter.match(ip_msg1));
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@ -248,7 +250,7 @@ int tft_filter_test_ipv4_remote_addr()
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packet_filter.filter_size = filter_size;
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memcpy(packet_filter.filter, filter_message, filter_size);
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srsue::tft_packet_filter_t filter(packet_filter);
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srsue::tft_packet_filter_t filter(EPS_BEARER_ID, packet_filter);
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// Check filter
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TESTASSERT(filter.match(ip_msg1));
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@ -296,7 +298,7 @@ int tft_filter_test_ipv4_tos()
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packet_filter.filter_size = filter_size;
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memcpy(packet_filter.filter, filter_message, filter_size);
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srsue::tft_packet_filter_t filter(packet_filter);
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srsue::tft_packet_filter_t filter(EPS_BEARER_ID, packet_filter);
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// Check filter
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TESTASSERT(filter.match(ip_msg1));
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