mirror of https://github.com/PentHertz/srsLTE.git
gw: fix race condition
GW thread was checking the default_eps_bearer variable without protection. RRC could update it when deleting DRB or receiving RRC connection release.
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parent
4d11e5552a
commit
0a16f48869
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@ -22,6 +22,7 @@
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#include "srsran/srslog/srslog.h"
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#include "tft_packet_filter.h"
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#include <atomic>
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#include <mutex>
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#include <net/if.h>
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#include <netinet/in.h>
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@ -84,6 +85,7 @@ private:
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static const int NOT_ASSIGNED = -1;
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int32_t default_eps_bearer_id = NOT_ASSIGNED;
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std::mutex gw_mutex;
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srslog::basic_logger& logger;
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@ -165,11 +165,7 @@ void gw::write_pdu_mch(uint32_t lcid, srsran::unique_byte_buffer_t pdu)
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/*******************************************************************************
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NAS interface
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*******************************************************************************/
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int gw::setup_if_addr(uint32_t eps_bearer_id,
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uint8_t pdn_type,
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uint32_t ip_addr,
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uint8_t* ipv6_if_addr,
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char* err_str)
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int gw::setup_if_addr(uint32_t eps_bearer_id, uint8_t pdn_type, uint32_t ip_addr, uint8_t* ipv6_if_addr, char* err_str)
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{
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int err;
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if (pdn_type == LIBLTE_MME_PDN_TYPE_IPV4 || pdn_type == LIBLTE_MME_PDN_TYPE_IPV4V6) {
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@ -212,8 +208,7 @@ bool gw::is_running()
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return running;
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}
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int gw::apply_traffic_flow_template(const uint8_t& erab_id,
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const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft)
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int gw::apply_traffic_flow_template(const uint8_t& erab_id, const LIBLTE_MME_TRAFFIC_FLOW_TEMPLATE_STRUCT* tft)
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{
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return tft_matcher.apply_traffic_flow_template(erab_id, tft);
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}
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@ -270,6 +265,8 @@ void gw::run_thread()
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break;
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}
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{
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std::unique_lock<std::mutex> lock(gw_mutex);
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// Check if IP version makes sense and get packtet length
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struct iphdr* ip_pkt = (struct iphdr*)pdu->msg;
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struct ipv6hdr* ip6_pkt = (struct ipv6hdr*)pdu->msg;
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@ -294,7 +291,9 @@ void gw::run_thread()
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if (!register_wait) {
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logger.info("UE is not attached, waiting for NAS attach (%d/%d)", register_wait, REGISTER_WAIT_TOUT);
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}
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usleep(100000);
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lock.unlock();
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std::this_thread::sleep_for(std::chrono::microseconds(100));
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lock.lock();
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register_wait++;
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}
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register_wait = 0;
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@ -343,13 +342,12 @@ void gw::run_thread()
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idx += N_bytes;
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logger.debug("Entire packet not read from socket. Total Length %d, N_Bytes %d.", ip_pkt->tot_len, pdu->N_bytes);
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}
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} // end of holdering gw_mutex
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}
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running = false;
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logger.info("GW IP receiver thread exiting.");
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}
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/**************************/
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/* TUN Interface Helpers */
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/**************************/
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