mirror of https://github.com/PentHertz/srsLTE.git
Started to fill in the necessary information for the create session response.
This commit is contained in:
parent
2172662388
commit
2e6050bf38
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@ -42,6 +42,7 @@ public:
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void init();
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void send_create_session_request(uint64_t imsi, struct srslte::gtpc_create_session_response *cs_resp);
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uint64_t get_new_ctrl_teid();
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private:
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@ -53,6 +54,8 @@ private:
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spgw* m_spgw;
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in_addr_t m_mme_gtpc_ip;
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uint64_t m_next_ctrl_teid;
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};
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}
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@ -39,6 +39,7 @@
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#include "srslte/common/log_filter.h"
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#include "srslte/common/buffer_pool.h"
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#include "srslte/common/threads.h"
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#include "srslte/asn1/gtpc.h"
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namespace srsepc{
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@ -50,6 +51,15 @@ typedef struct {
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} spgw_args_t;
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typedef struct {
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uint64_t imsi;
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in_addr_t ue_ipv4;
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struct gtpc_f_teid_ie uplink_ctrl;
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struct gtpc_f_teid_ie uplink_user;
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struct gtpc_f_teid_ie downlink_ctrl;
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struct gtpc_f_teid_ie downlink_user;
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} spgw_ue_ctxr;
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class spgw:
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public thread
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{
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@ -60,6 +70,8 @@ public:
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void stop();
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void run_thread();
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void handle_create_session_request(struct srslte::gtpc_create_session_request *cs_req, struct srslte::gtpc_create_session_response *cs_resp);
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private:
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spgw();
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@ -81,7 +93,7 @@ private:
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/*Logs*/
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srslte::log_filter *m_spgw_log;
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};
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} // namespace srsepc
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@ -34,6 +34,7 @@ mme_gtpc* mme_gtpc::m_instance = NULL;
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boost::mutex mme_gtpc_instance_mutex;
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mme_gtpc::mme_gtpc()
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:m_next_ctrl_teid(1)
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{
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}
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@ -69,12 +70,20 @@ mme_gtpc::init()
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m_spgw = spgw::get_instance();
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}
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uint64_t
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mme_gtpc::get_new_ctrl_teid()
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{
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return m_next_ctrl_teid++; //FIXME Use a Id pool?
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}
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void
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mme_gtpc::send_create_session_request(uint64_t imsi, struct srslte::gtpc_create_session_response *cs_resp)
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{
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struct srslte::gtpc_pdu cs_req_pdu;
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struct srslte::gtpc_create_session_request *cs_req = &cs_req_pdu.choice.create_session_request;
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//Initialize GTP-C message to zero
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bzero(&cs_req_pdu, sizeof(struct srslte::gtpc_pdu));
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//Setup GTP-C Header. FIXME: Length, sequence and other fields need to be added.
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cs_req_pdu.header.piggyback = false;
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cs_req_pdu.header.teid_present = true;
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@ -93,7 +102,7 @@ mme_gtpc::send_create_session_request(uint64_t imsi, struct srslte::gtpc_create_
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//Save RX Control TEID
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//create_rx_control_teid(cs_req->sender_f_teid);
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//spgw->handle_create_session_request(&cs_req, cs_resp);
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m_spgw->handle_create_session_request(cs_req, cs_resp);
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return;
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}
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} //namespace srsepc
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@ -35,6 +35,7 @@
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#include <linux/if_tun.h>
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#include "spgw/spgw.h"
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namespace srsepc{
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spgw* spgw::m_instance = NULL;
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@ -128,6 +129,106 @@ spgw::stop()
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return;
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}
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srslte::error_t
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spgw::init_sgi_if(spgw_args_t *args)
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{
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char dev[IFNAMSIZ] = "srs_spgw_sgi";
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struct ifreq ifr;
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if(m_sgi_up)
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{
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return(srslte::ERROR_ALREADY_STARTED);
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}
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// Construct the TUN device
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m_sgi_if = open("/dev/net/tun", O_RDWR);
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m_spgw_log->info("TUN file descriptor = %d\n", m_sgi_if);
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if(m_sgi_if < 0)
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{
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m_spgw_log->error("Failed to open TUN device: %s\n", strerror(errno));
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return(srslte::ERROR_CANT_START);
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}
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memset(&ifr, 0, sizeof(ifr));
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ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
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strncpy(ifr.ifr_ifrn.ifrn_name, dev, IFNAMSIZ);
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if(ioctl(m_sgi_if, TUNSETIFF, &ifr) < 0)
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{
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m_spgw_log->error("Failed to set TUN device name: %s\n", strerror(errno));
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close(m_sgi_if);
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return(srslte::ERROR_CANT_START);
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}
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// Bring up the interface
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m_sgi_sock = socket(AF_INET, SOCK_DGRAM, 0);
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if(ioctl(m_sgi_sock, SIOCGIFFLAGS, &ifr) < 0)
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{
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m_spgw_log->error("Failed to bring up socket: %s\n", strerror(errno));
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close(m_sgi_if);
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return(srslte::ERROR_CANT_START);
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}
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ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
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if(ioctl(m_sgi_sock, SIOCSIFFLAGS, &ifr) < 0)
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{
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m_spgw_log->error("Failed to set socket flags: %s\n", strerror(errno));
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close(m_sgi_if);
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return(srslte::ERROR_CANT_START);
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}
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//Set IP of the interface
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struct sockaddr_in *addr = (struct sockaddr_in*)&ifr.ifr_addr;
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addr->sin_family = AF_INET;
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addr->sin_addr.s_addr = inet_addr(args->sgi_if_addr.c_str());
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addr->sin_port = 0;
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if (ioctl(m_sgi_sock, SIOCSIFADDR, &ifr) < 0) {
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m_spgw_log->error("Failed to set TUN interface IP. Address: %s, Error: %s\n", args->sgi_if_addr.c_str(), strerror(errno));
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close(m_sgi_if);
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close(m_sgi_sock);
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return srslte::ERROR_CANT_START;
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}
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ifr.ifr_netmask.sa_family = AF_INET;
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((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr = inet_addr("255.255.255.0");
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if (ioctl(m_sgi_sock, SIOCSIFNETMASK, &ifr) < 0) {
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m_spgw_log->error("Failed to set TUN interface Netmask. Error: %s\n", strerror(errno));
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close(m_sgi_if);
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close(m_sgi_sock);
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return srslte::ERROR_CANT_START;
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}
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m_sgi_up = true;
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return(srslte::ERROR_NONE);
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}
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srslte::error_t
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spgw::init_s1u(spgw_args_t *args)
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{
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//Open S1-U socket
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m_s1u = socket(AF_INET,SOCK_DGRAM,0);
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if (m_s1u == -1)
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{
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m_spgw_log->error("Failed to open socket: %s\n", strerror(errno));
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return srslte::ERROR_CANT_START;
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}
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m_s1u_up = true;
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//Bind the socket
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struct sockaddr_in servaddr;
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servaddr.sin_family = AF_INET;
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servaddr.sin_addr.s_addr=inet_addr(args->gtpu_bind_addr.c_str());
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servaddr.sin_port=htons(GTPU_RX_PORT);
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if (bind(m_s1u,(struct sockaddr *)&servaddr,sizeof(struct sockaddr_in))) {
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m_spgw_log->error("Failed to bind socket: %s\n", strerror(errno));
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return srslte::ERROR_CANT_START;
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}
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m_spgw_log->info("S1-U socket = %d\n", m_s1u);
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return srslte::ERROR_NONE;
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}
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void
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spgw::run_thread()
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{
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return;
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}
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srslte::error_t
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spgw::init_sgi_if(spgw_args_t *args)
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void
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spgw::handle_create_session_request(struct srslte::gtpc_create_session_request *cs_req, struct srslte::gtpc_create_session_response *cs_resp)
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{
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char dev[IFNAMSIZ] = "srs_spgw_sgi";
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struct ifreq ifr;
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//Setup uplink control TEID
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uint64_t spgw_uplink_ctrl_teid = get_new_ctrl_teid();
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//Setup uplink user TEID
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uint64_t spgw_uplink_user_teid = get_new_user_teid();
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//Allocate UE IP
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in_addr_t ue_ip = get_new_ue_ipv4();
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if(m_sgi_up)
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{
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return(srslte::ERROR_ALREADY_STARTED);
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}
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//Save the UE context //TODO!!!
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// Construct the TUN device
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m_sgi_if = open("/dev/net/tun", O_RDWR);
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m_spgw_log->info("TUN file descriptor = %d\n", m_sgi_if);
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if(m_sgi_if < 0)
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{
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m_spgw_log->error("Failed to open TUN device: %s\n", strerror(errno));
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return(srslte::ERROR_CANT_START);
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}
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//Create session response message
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//Initialize to zero\\
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bzero(cs_resp,sizeof(struct srslte::gtpc_create_session_response));
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//Setup Cause\\
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cs_resp->cause = ;
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//Setup sender F-TEID (ctrl)\\
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cs_resp->sender_f_teid.teid_present = true;
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cs_resp->sender_f_teid.teid = spgw_uplink_ctrl_teid;
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cs_resp->sender_f_teid.ipv4 = m_gtpu_bind_addr;//FIXME This is not relevant, as the GTP-C is not transmitted over sockets yet.
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//Bearer context created\\
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cs_resp->eps_bearer_context_created.ebi = 5;
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cs_resp->eps_bearer_context_created.cause = ;
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cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid_present=true;
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cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid.teid = spgw_uplink_user_teid;
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//Fill in the PDA\\
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cs_resp->pda_present = true;
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cs_resp->pda.pdn_type = srslte::GTPC_IPV4;
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cs_resp->ipv4_present = true;
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cs_resp->ipv4 = ue_ip;
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memset(&ifr, 0, sizeof(ifr));
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ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
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strncpy(ifr.ifr_ifrn.ifrn_name, dev, IFNAMSIZ);
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if(ioctl(m_sgi_if, TUNSETIFF, &ifr) < 0)
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{
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m_spgw_log->error("Failed to set TUN device name: %s\n", strerror(errno));
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close(m_sgi_if);
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return(srslte::ERROR_CANT_START);
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}
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// Bring up the interface
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m_sgi_sock = socket(AF_INET, SOCK_DGRAM, 0);
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if(ioctl(m_sgi_sock, SIOCGIFFLAGS, &ifr) < 0)
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{
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m_spgw_log->error("Failed to bring up socket: %s\n", strerror(errno));
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close(m_sgi_if);
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return(srslte::ERROR_CANT_START);
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}
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ifr.ifr_flags |= IFF_UP | IFF_RUNNING;
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if(ioctl(m_sgi_sock, SIOCSIFFLAGS, &ifr) < 0)
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{
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m_spgw_log->error("Failed to set socket flags: %s\n", strerror(errno));
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close(m_sgi_if);
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return(srslte::ERROR_CANT_START);
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}
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//Set IP of the interface
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struct sockaddr_in *addr = (struct sockaddr_in*)&ifr.ifr_addr;
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addr->sin_family = AF_INET;
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addr->sin_addr.s_addr = inet_addr(args->sgi_if_addr.c_str());
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addr->sin_port = 0;
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if (ioctl(m_sgi_sock, SIOCSIFADDR, &ifr) < 0) {
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m_spgw_log->error("Failed to set TUN interface IP. Address: %s, Error: %s\n", args->sgi_if_addr.c_str(), strerror(errno));
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close(m_sgi_if);
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close(m_sgi_sock);
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return srslte::ERROR_CANT_START;
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}
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ifr.ifr_netmask.sa_family = AF_INET;
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((struct sockaddr_in *)&ifr.ifr_netmask)->sin_addr.s_addr = inet_addr("255.255.255.0");
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if (ioctl(m_sgi_sock, SIOCSIFNETMASK, &ifr) < 0) {
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m_spgw_log->error("Failed to set TUN interface Netmask. Error: %s\n", strerror(errno));
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close(m_sgi_if);
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close(m_sgi_sock);
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return srslte::ERROR_CANT_START;
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}
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m_sgi_up = true;
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return(srslte::ERROR_NONE);
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}
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srslte::error_t
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spgw::init_s1u(spgw_args_t *args)
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{
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//Open S1-U socket
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m_s1u = socket(AF_INET,SOCK_DGRAM,0);
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if (m_s1u == -1)
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{
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m_spgw_log->error("Failed to open socket: %s\n", strerror(errno));
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return srslte::ERROR_CANT_START;
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}
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m_s1u_up = true;
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//Bind the socket
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struct sockaddr_in servaddr;
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servaddr.sin_family = AF_INET;
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servaddr.sin_addr.s_addr=inet_addr(args->gtpu_bind_addr.c_str());
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servaddr.sin_port=htons(GTPU_RX_PORT);
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if (bind(m_s1u,(struct sockaddr *)&servaddr,sizeof(struct sockaddr_in))) {
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m_spgw_log->error("Failed to bind socket: %s\n", strerror(errno));
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return srslte::ERROR_CANT_START;
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}
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m_spgw_log->info("S1-U socket = %d\n", m_s1u);
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return srslte::ERROR_NONE;
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return;
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}
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} //namespace srsepc
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