module CPF_ConnectionHandler { /* CPF Connection Handler of UPF_Tests in TTCN-3 * (C) 2022 by sysmocom - s.f.m.c. GmbH * All rights reserved. * * Released under the terms of GNU General Public License, Version 2 or * (at your option) any later version. * * SPDX-License-Identifier: GPL-2.0-or-later */ import from Misc_Helpers all; import from General_Types all; import from Osmocom_Types all; import from IPL4asp_Types all; import from Native_Functions all; import from StatsD_Checker all; import from TELNETasp_PortType all; import from Osmocom_VTY_Functions all; import from PFCP_Types all; import from PFCP_Emulation all; /* The system under test is a UPF (User Plane Function). This component represents a Control Plane Function, with a * single association via PFCP to the UPF (User Plane Function). */ type component CPF_ConnHdlr extends StatsD_ConnHdlr { port PFCPEM_PT PFCP; port TELNETasp_PT UPFVTY; var PFCP_Emulation_CT vc_PFCP; var TestHdlrParams g_pars; var boolean g_vty_initialized := false; var integer g_recovery_timestamp; var integer g_next_seid_state; var integer g_next_local_teid_state; var integer g_next_remote_teid_state; var integer g_next_ue_addr_state; } function f_next_seid() runs on CPF_ConnHdlr return OCT8 { g_next_seid_state := g_next_seid_state + 1; return int2oct(g_next_seid_state, 8); } function f_next_remote_teid() runs on CPF_ConnHdlr return OCT4 { g_next_remote_teid_state := g_next_remote_teid_state + 1; return int2oct(g_next_remote_teid_state, 4); } function f_next_ue_addr() runs on CPF_ConnHdlr return charstring { g_next_ue_addr_state := g_next_ue_addr_state + 1; if (g_next_ue_addr_state > 254) { g_next_ue_addr_state := 16; } return "192.168.44." & int2str(g_next_ue_addr_state); } function f_CPF_ConnHdlr_init_vty() runs on CPF_ConnHdlr { if (not g_vty_initialized) { map(self:UPFVTY, system:UPFVTY); f_vty_set_prompts(UPFVTY); f_vty_transceive(UPFVTY, "enable"); g_vty_initialized := true; } } private function f_CPF_ConnHdlr_init_pfcp(charstring id) runs on CPF_ConnHdlr { id := id & "-PFCP"; g_recovery_timestamp := f_rnd_int(4294967295); g_next_seid_state := (1 + f_rnd_int(65534)) * 65536; g_next_local_teid_state := (1 + f_rnd_int(65534)) * 65536; g_next_remote_teid_state := (1 + f_rnd_int(65534)) * 65536; g_next_ue_addr_state := (1 + f_rnd_int(15)) * 16; var PFCP_Emulation_Cfg pfcp_cfg := { pfcp_bind_ip := g_pars.local_addr, pfcp_bind_port := g_pars.local_port, pfcp_remote_ip := g_pars.remote_upf_addr, pfcp_remote_port := g_pars.remote_upf_port, role := CPF }; vc_PFCP := PFCP_Emulation_CT.create(id) alive; connect(self:PFCP, vc_PFCP:CLIENT); vc_PFCP.start(PFCP_Emulation.main(pfcp_cfg)); } /* initialize all parameters */ function f_CPF_ConnHdlr_init(charstring id, TestHdlrParams pars) runs on CPF_ConnHdlr { g_pars := valueof(pars); f_CPF_ConnHdlr_init_pfcp(id); f_CPF_ConnHdlr_init_vty(); } type record TestHdlrParams { charstring remote_upf_addr, integer remote_upf_port, charstring local_addr, integer local_port, Node_ID local_node_id }; /* Note: Do not use valueof() to get a value of this template, use * f_gen_test_hdlr_pars() instead in order to get a configuration. */ template (value) TestHdlrParams t_def_TestHdlrPars := { remote_upf_addr := "127.0.0.1", remote_upf_port := 8805, local_addr := "127.0.0.2", local_port := 8805 } }