Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 1 | /* Component implementing a IMS server towards Asterisk's IMS UE |
| 2 | * (C) 2024 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de> |
| 3 | * Author: Pau Espin Pedrol <pespin@sysmocom.de> |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Released under the terms of GNU General Public License, Version 2 or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 10 | */ |
| 11 | module IMS_ConnectionHandler { |
| 12 | |
Pau Espin Pedrol | 717379f | 2024-05-17 18:36:51 +0200 | [diff] [blame] | 13 | import from TCCEncoding_Functions all; |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 14 | import from TCCOpenSecurity_Functions all; |
| 15 | import from General_Types all; |
| 16 | import from Osmocom_Types all; |
| 17 | import from Native_Functions all; |
| 18 | import from Misc_Helpers all; |
| 19 | |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 20 | /* the PIPE asp port allows us to interact with ip xfrm via stdin/stdout */ |
| 21 | import from PIPEasp_PortType all; |
| 22 | import from PIPEasp_Types all; |
| 23 | import from PIPEasp_Templates all; |
| 24 | |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 25 | import from SDP_Types all; |
| 26 | import from SDP_Templates all; |
| 27 | |
| 28 | import from SIP_Emulation all; |
| 29 | import from SIPmsg_Types all; |
| 30 | import from SIP_Templates all; |
| 31 | |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 32 | |
| 33 | modulepar { |
| 34 | charstring mp_ipsec_setup_script_path := "./IMS_ipsec_setup.sh"; |
| 35 | } |
| 36 | |
Pau Espin Pedrol | cb0dbf9 | 2024-06-06 20:40:30 +0200 | [diff] [blame] | 37 | const integer c_def_expires := 600000; /* 3GPP TS 24.229 5.1.1.2.1 e) */ |
Pau Espin Pedrol | a2424b2 | 2024-06-10 20:23:13 +0200 | [diff] [blame] | 38 | const charstring c_sip_server_name := "osmo-ttcn3-hacks/0.23"; |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 39 | |
| 40 | |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 41 | type port IMSCoord_PT message |
| 42 | { |
| 43 | inout charstring; |
| 44 | } with { extension "internal" }; |
| 45 | |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 46 | const charstring IMS_COORD_CMD_REGISTERED := "IMS_COORD_CMD_REGISTERED"; |
| 47 | const charstring IMS_COORD_CMD_START := "IMS_COORD_CMD_START"; |
| 48 | const charstring IMS_COORD_CMD_CALL_ESTABLISHED := "IMS_COORD_CMD_CALL_ESTABLISHED"; |
| 49 | const charstring IMS_COORD_CMD_HANGUP := "IMS_COORD_CMD_HANGUP"; |
Pau Espin Pedrol | 4d57206 | 2024-06-18 20:20:55 +0200 | [diff] [blame] | 50 | const charstring IMS_COORD_CMD_CALL_TRYING := "IMS_COORD_CMD_CALL_TRYING"; |
| 51 | const charstring IMS_COORD_CMD_CALL_SESSION_PROGRESS := "IMS_COORD_CMD_CALL_SESSION_PROGRESS"; |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 52 | |
| 53 | type component IMS_ConnHdlr extends SIP_ConnHdlr { |
| 54 | var charstring g_name; |
| 55 | var IMS_ConnHdlrPars g_pars; |
| 56 | timer g_Tguard; |
| 57 | var PDU_SIP_Request g_rx_sip_req; |
| 58 | var PDU_SIP_Response g_rx_sip_resp; |
| 59 | |
| 60 | port IMSCoord_PT COORD; |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 61 | port PIPEasp_PT PIPE; |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 62 | } |
| 63 | type record of IMS_ConnHdlr IMS_ConnHdlrList; |
| 64 | |
Pau Espin Pedrol | 80b981a | 2024-06-04 18:37:22 +0200 | [diff] [blame] | 65 | type record IMS_AuthVector { |
| 66 | OCT16 rand, |
| 67 | OCT16 autn, |
| 68 | OCT8 res, |
| 69 | OCT16 ck, |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 70 | OCT16 ik, |
| 71 | OCT14 auts |
Pau Espin Pedrol | 80b981a | 2024-06-04 18:37:22 +0200 | [diff] [blame] | 72 | } |
| 73 | |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 74 | type record IMS_ConnHdlrSubscrPars { |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 75 | charstring remote_sip_host optional, |
| 76 | uint16_t remote_sip_port optional, |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 77 | charstring imsi, |
Pau Espin Pedrol | a017f44 | 2024-06-20 16:04:51 +0200 | [diff] [blame] | 78 | charstring imei, |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 79 | charstring display_name, |
| 80 | charstring password, |
Pau Espin Pedrol | 4e6672c | 2024-05-22 17:03:53 +0200 | [diff] [blame] | 81 | charstring msisdn, |
Pau Espin Pedrol | a017f44 | 2024-06-20 16:04:51 +0200 | [diff] [blame] | 82 | boolean support_video, |
| 83 | boolean support_smsip, |
Pau Espin Pedrol | 0c5c647 | 2024-05-21 13:13:49 +0200 | [diff] [blame] | 84 | /* Expected User-Location-Info in P-Access-Network-Info */ |
| 85 | charstring uli_str, |
Pau Espin Pedrol | 80b981a | 2024-06-04 18:37:22 +0200 | [diff] [blame] | 86 | IMS_AuthVector auth, |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 87 | charstring ipsec_auth_key, |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 88 | integer ipsec_local_spi_c, |
| 89 | integer ipsec_local_spi_s, |
| 90 | integer ipsec_remote_spi_c optional, |
| 91 | integer ipsec_remote_spi_s optional, |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 92 | uint16_t ipsec_remote_port_c optional, |
| 93 | uint16_t ipsec_remote_port_s optional, |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 94 | SipAddr registrar_sip_record, |
| 95 | CallidString registrar_sip_call_id, |
| 96 | integer registrar_sip_seq_nr, |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 97 | SipUrl local_sip_url_ext, |
| 98 | SipAddr local_sip_record, |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 99 | Contact registered_contact optional, |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 100 | P_Associated_Uri p_associated_uri, |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 101 | IMS_CallPars cp optional |
| 102 | } |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 103 | type record of IMS_ConnHdlrSubscrPars IMS_ConnHdlrSubscrParsList; |
| 104 | |
| 105 | |
| 106 | type record IMS_ConnHdlrPars { |
| 107 | float t_guard, |
| 108 | charstring realm, |
| 109 | charstring local_sip_host, |
| 110 | uint16_t local_sip_port, |
| 111 | SipUrl registrar_sip_req_uri, |
| 112 | Via local_via, |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 113 | Server server_name, |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 114 | IMS_ConnHdlrSubscrPars subscr optional |
| 115 | } |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 116 | type record of IMS_ConnHdlrPars IMS_ConnHdlrParsList; |
| 117 | |
Pau Espin Pedrol | 4d57206 | 2024-06-18 20:20:55 +0200 | [diff] [blame] | 118 | type record IMS_CallParsMO { |
| 119 | /* Whether to COORD.send(IMS_COORD_CMD_CALL_TRYING) when receiving an INVITE from UE. */ |
| 120 | boolean tx_coord_cmd_invite_trying |
| 121 | } |
| 122 | template (value) IMS_CallParsMO t_IMS_CallParsMO := { |
| 123 | tx_coord_cmd_invite_trying := false |
| 124 | } |
| 125 | |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 126 | type record IMS_CallParsMT { |
Pau Espin Pedrol | 4d57206 | 2024-06-18 20:20:55 +0200 | [diff] [blame] | 127 | /* Whether to COORD.send(IMS_COORD_CMD_CALL_SESSION_PROGRESS) when receiving an 183 Session Progress from UE. */ |
| 128 | boolean tx_coord_cmd_session_progress |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 129 | } |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 130 | template (value) IMS_CallParsMT t_IMS_CallParsMT := { |
Pau Espin Pedrol | 4d57206 | 2024-06-18 20:20:55 +0200 | [diff] [blame] | 131 | tx_coord_cmd_session_progress := false |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 132 | } |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 133 | |
| 134 | type record IMS_CallPars { |
| 135 | SipAddr calling optional, |
| 136 | SipAddr called optional, |
| 137 | |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 138 | From from_addr optional, |
| 139 | To to_addr optional, |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 140 | |
| 141 | CallidString sip_call_id, |
| 142 | integer sip_seq_nr, |
| 143 | charstring sip_body optional, |
| 144 | |
| 145 | charstring local_rtp_addr, |
| 146 | uint16_t local_rtp_port, |
| 147 | |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 148 | boolean support_precondition_ext, |
| 149 | boolean require_precondition_ext, |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 150 | SDP_Message peer_sdp optional, |
Pau Espin Pedrol | 4d57206 | 2024-06-18 20:20:55 +0200 | [diff] [blame] | 151 | IMS_CallParsMO mo, |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 152 | IMS_CallParsMT mt |
| 153 | } |
| 154 | |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 155 | template (value) IMS_CallPars t_IMS_CallPars(charstring local_rtp_addr, |
| 156 | uint16_t local_rtp_port := 0, |
| 157 | template (omit) SipAddr calling := omit, |
| 158 | template (omit) SipAddr called := omit) := { |
| 159 | calling := calling, |
| 160 | called := called, |
| 161 | from_addr := omit, |
| 162 | to_addr := omit, |
| 163 | sip_call_id := hex2str(f_rnd_hexstring(15)), |
| 164 | sip_seq_nr := f_sip_rand_seq_nr(), |
| 165 | sip_body := omit, |
| 166 | local_rtp_addr := local_rtp_addr, |
| 167 | local_rtp_port := local_rtp_port, |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 168 | support_precondition_ext := true, |
| 169 | require_precondition_ext := false, |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 170 | peer_sdp := omit, |
Pau Espin Pedrol | 4d57206 | 2024-06-18 20:20:55 +0200 | [diff] [blame] | 171 | mo := t_IMS_CallParsMO, |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 172 | mt := t_IMS_CallParsMT |
| 173 | } |
| 174 | |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 175 | template (value) IMS_ConnHdlrSubscrPars t_IMS_SubscrPars(charstring local_sip_host, |
| 176 | uint16_t local_sip_port, |
Pau Espin Pedrol | f46132e | 2024-06-04 17:11:59 +0200 | [diff] [blame] | 177 | charstring domain, |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 178 | charstring imsi, |
Pau Espin Pedrol | a017f44 | 2024-06-20 16:04:51 +0200 | [diff] [blame] | 179 | charstring imei, |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 180 | charstring msisdn := "90828", |
| 181 | charstring display_name := "Anonymous", |
| 182 | charstring password := "secret", |
| 183 | template (omit) IMS_CallPars cp := omit) := { |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 184 | remote_sip_host := omit, |
| 185 | remote_sip_port := omit, |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 186 | imsi := imsi, |
Pau Espin Pedrol | a017f44 | 2024-06-20 16:04:51 +0200 | [diff] [blame] | 187 | imei := imei, |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 188 | display_name := f_sip_str_quote(display_name), |
| 189 | password := password, |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 190 | msisdn := msisdn, |
Pau Espin Pedrol | a017f44 | 2024-06-20 16:04:51 +0200 | [diff] [blame] | 191 | support_video := false, |
| 192 | support_smsip := false, |
Pau Espin Pedrol | 0c5c647 | 2024-05-21 13:13:49 +0200 | [diff] [blame] | 193 | uli_str := "2380100010000101", |
Pau Espin Pedrol | 80b981a | 2024-06-04 18:37:22 +0200 | [diff] [blame] | 194 | auth := { |
| 195 | /* The Nonce field is the Base64 encoded version of the RAND value and concatenated with the AUTN: */ |
| 196 | rand := 'd5d5de2bce418d7865ed7fa6956618a2'O, |
| 197 | autn := 'd42e61db5f15800067393a5b7691a227'O, |
| 198 | res := '6f2556bbe4366ab1'O, |
| 199 | ck := '0b389d08c833991734936bec55cac800'O, |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 200 | ik := '17141862125bd30c81c4224391a0909a'O, |
| 201 | /* NOTE: AUTS value randomly crafted. It's fine since it's just forwarded |
| 202 | * AMI -> asterisk -> IMS and we blindly match and accept it. */ |
| 203 | auts := 'd42e61db5f15800067393a5b7691'O |
Pau Espin Pedrol | 80b981a | 2024-06-04 18:37:22 +0200 | [diff] [blame] | 204 | }, |
| 205 | ipsec_auth_key := "0x17141862125bd30c81c4224391a0909a00000000", |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 206 | ipsec_local_spi_c := 4142, |
| 207 | ipsec_local_spi_s := 4143, |
| 208 | ipsec_remote_spi_c := omit, |
| 209 | ipsec_remote_spi_s := omit, |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 210 | ipsec_remote_port_c := omit, |
| 211 | ipsec_remote_port_s := omit, |
Pau Espin Pedrol | f46132e | 2024-06-04 17:11:59 +0200 | [diff] [blame] | 212 | registrar_sip_record := ts_SipAddr(ts_HostPort(domain), |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 213 | ts_UserInfo(imsi), |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 214 | f_sip_str_quote(display_name)), |
Pau Espin Pedrol | f46132e | 2024-06-04 17:11:59 +0200 | [diff] [blame] | 215 | registrar_sip_call_id := hex2str(f_rnd_hexstring(15)) & "@" & domain, |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 216 | registrar_sip_seq_nr := f_sip_rand_seq_nr(), |
Pau Espin Pedrol | f46132e | 2024-06-04 17:11:59 +0200 | [diff] [blame] | 217 | local_sip_url_ext := ts_SipUrl(ts_HostPort(domain, local_sip_port), |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 218 | ts_UserInfo(imsi)), |
Pau Espin Pedrol | f46132e | 2024-06-04 17:11:59 +0200 | [diff] [blame] | 219 | local_sip_record := ts_SipAddr(ts_HostPort(domain), |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 220 | ts_UserInfo(imsi)), |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 221 | registered_contact := omit, |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 222 | p_associated_uri := ts_P_Associated_Uri({}), |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 223 | cp := cp |
| 224 | } |
| 225 | |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 226 | template (value) IMS_ConnHdlrPars t_IMS_Pars(charstring local_sip_host, |
| 227 | uint16_t local_sip_port, |
Pau Espin Pedrol | f46132e | 2024-06-04 17:11:59 +0200 | [diff] [blame] | 228 | charstring domain, |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 229 | charstring imsi, |
Pau Espin Pedrol | a017f44 | 2024-06-20 16:04:51 +0200 | [diff] [blame] | 230 | charstring imei, |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 231 | template (omit) IMS_CallPars cp := omit) := { |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 232 | t_guard := 60.0, |
Pau Espin Pedrol | f46132e | 2024-06-04 17:11:59 +0200 | [diff] [blame] | 233 | realm := domain, |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 234 | local_sip_host := local_sip_host, |
| 235 | local_sip_port := local_sip_port, |
Pau Espin Pedrol | f46132e | 2024-06-04 17:11:59 +0200 | [diff] [blame] | 236 | registrar_sip_req_uri := valueof(ts_SipUrlHost(domain)), |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 237 | local_via := ts_Via_from(ts_HostPort(local_sip_host, local_sip_port)), |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 238 | server_name := valueof(ts_Server({c_sip_server_name})), |
Pau Espin Pedrol | a017f44 | 2024-06-20 16:04:51 +0200 | [diff] [blame] | 239 | subscr := t_IMS_SubscrPars(local_sip_host, local_sip_port, |
| 240 | domain := domain, imsi := imsi, |
| 241 | imei := imei, cp := cp) |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 242 | } |
| 243 | |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 244 | private altstep as_Tguard() runs on IMS_ConnHdlr { |
| 245 | [] g_Tguard.timeout { |
| 246 | setverdict(fail, "Tguard timeout"); |
| 247 | mtc.stop; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | type function ims_void_fn(charstring id) runs on IMS_ConnHdlr; |
| 252 | function f_ims_handler_init(ims_void_fn fn, charstring id, IMS_ConnHdlrPars pars) |
| 253 | runs on IMS_ConnHdlr { |
| 254 | g_name := id; |
| 255 | g_pars := pars; |
| 256 | g_Tguard.start(pars.t_guard); |
| 257 | activate(as_Tguard()); |
| 258 | |
| 259 | /* call the user-supied test case function */ |
| 260 | fn.apply(id); |
| 261 | } |
| 262 | |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 263 | altstep as_SIP_fail_req(charstring exp_msg_str := "") runs on IMS_ConnHdlr |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 264 | { |
| 265 | var PDU_SIP_Request sip_req; |
| 266 | [] SIP.receive(PDU_SIP_Request:?) -> value sip_req { |
| 267 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 268 | log2str(g_name & ": Received unexpected SIP Req message := ", sip_req, "\nvs exp := ", exp_msg_str)); |
| 269 | } |
| 270 | } |
| 271 | |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 272 | altstep as_SIP_fail_resp(charstring exp_msg_str := "") runs on IMS_ConnHdlr |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 273 | { |
| 274 | var PDU_SIP_Response sip_resp; |
| 275 | [] SIP.receive(PDU_SIP_Response:?) -> value sip_resp { |
| 276 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 277 | log2str(g_name & ": Received unexpected SIP Resp message := ", sip_resp, "\nvs exp := ", exp_msg_str)); |
| 278 | } |
| 279 | } |
| 280 | |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 281 | altstep as_SIP_expect_resp(template (present) PDU_SIP_Response sip_expect, boolean fail_others := true) runs on IMS_ConnHdlr |
| 282 | { |
| 283 | var charstring sip_expect_str := log2str(sip_expect); |
| 284 | [] SIP.receive(sip_expect) -> value g_rx_sip_resp; |
| 285 | [fail_others] as_SIP_fail_resp(sip_expect_str); |
| 286 | [fail_others] as_SIP_fail_req(sip_expect_str); |
| 287 | } |
| 288 | |
| 289 | altstep as_SIP_ignore_resp(template PDU_SIP_Response sip_expect := ?) runs on IMS_ConnHdlr |
| 290 | { |
| 291 | [] SIP.receive(sip_expect) -> value g_rx_sip_resp { |
| 292 | log("Ignoring ", g_rx_sip_resp); |
| 293 | repeat; |
| 294 | } |
| 295 | } |
| 296 | |
Pau Espin Pedrol | 717379f | 2024-05-17 18:36:51 +0200 | [diff] [blame] | 297 | private function f_nonce_from_rand_autn(octetstring rand, octetstring autn) return charstring { |
| 298 | var octetstring concat := rand & autn; |
| 299 | var charstring nonce := enc_MIME_Base64(concat); |
| 300 | log("rand=", rand, " & autn=",autn, " => nonce=", nonce); |
| 301 | return nonce; |
| 302 | } |
| 303 | |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 304 | /* HTTP Digest Authentication Using AKA (AKAv1-MD5): RFC 3310 */ |
| 305 | function f_tr_Authorization_AKAv1MD5(WwwAuthenticate www_authenticate, |
| 306 | charstring username, |
Pau Espin Pedrol | 80b981a | 2024-06-04 18:37:22 +0200 | [diff] [blame] | 307 | charstring uri) |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 308 | return template (present) Authorization { |
| 309 | var CommaParam_List digestCln; |
| 310 | var template (present) Authorization authorization; |
| 311 | var template (present) Credentials cred; |
| 312 | var template (omit) GenericParam rx_param; |
| 313 | |
| 314 | digestCln := www_authenticate.challenge[0].digestCln; |
| 315 | |
| 316 | var charstring algorithm := f_sip_param_get_value_present_or_fail(digestCln, "algorithm"); |
| 317 | var charstring realm := f_sip_param_get_value_present_or_fail(digestCln, "realm"); |
| 318 | var charstring nonce := f_sip_param_get_value_present_or_fail(digestCln, "nonce"); |
| 319 | |
| 320 | var template (present) CommaParam_List digestResponse := superset( |
| 321 | tr_Param("username", f_sip_str_quote(username)), |
| 322 | tr_Param("realm", f_sip_str_quote(realm)), |
| 323 | tr_Param("nonce", f_sip_str_quote(nonce)), |
| 324 | tr_Param("uri", f_sip_str_quote(uri)), |
| 325 | tr_Param("response", ?), |
| 326 | tr_Param("algorithm", algorithm), |
| 327 | tr_Param("qop", "auth"), |
| 328 | tr_Param("cnonce", ?), |
| 329 | tr_Param("nc", ?) |
| 330 | ); |
| 331 | cred := tr_Credentials_DigestResponse(digestResponse); |
| 332 | authorization := tr_Authorization(cred); |
| 333 | return authorization; |
| 334 | } |
| 335 | |
Pau Espin Pedrol | 80b981a | 2024-06-04 18:37:22 +0200 | [diff] [blame] | 336 | private function f_ims_validate_Authorization_AKAv1MD5_Response(Authorization authorization, charstring method) |
| 337 | runs on IMS_ConnHdlr { |
| 338 | f_sip_digest_validate_Authorization_AKAv1MD5(authorization, method, g_pars.subscr.auth.res); |
| 339 | } |
| 340 | |
Pau Espin Pedrol | 1848ebf | 2024-06-21 17:43:39 +0200 | [diff] [blame] | 341 | /* GSMA IR-92 2.2.1 SIP Registration Procedure */ |
Pau Espin Pedrol | a017f44 | 2024-06-20 16:04:51 +0200 | [diff] [blame] | 342 | private function f_ims_validate_register_contact(Contact rx_contact) runs on IMS_ConnHdlr |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 343 | { |
Pau Espin Pedrol | a017f44 | 2024-06-20 16:04:51 +0200 | [diff] [blame] | 344 | /* IMS contact shows up like this: |
| 345 | * Contact: <sip:8adf9f3d-9342-4060-aa4f-a909f37fd6f6@192.168.101.2:5060>;+g.3gpp.accesstype="cellular2";video;audio;+g.3gpp.smsip;+g.3gpp.nw-init-ussi;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel";+sip.instance="<urn:gsma:imei:35589811-338445-0>" |
| 346 | */ |
| 347 | if (ischosen(rx_contact.contactBody.wildcard)) { |
| 348 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 349 | log2str(g_name & ": Received unexpected Contact wildcard := ", rx_contact)); |
| 350 | } |
| 351 | var ContactAddress_List caddrs := rx_contact.contactBody.contactAddresses; |
| 352 | if (lengthof(caddrs) == 0) { |
| 353 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 354 | log2str(g_name & ": Received unexpected empty Contact Address list")); |
| 355 | } |
| 356 | for (var integer i := 0; i < lengthof(caddrs); i := i + 1) { |
| 357 | var ContactAddress caddr := caddrs[i]; |
| 358 | var template (omit) GenericParam param_tpl; |
| 359 | var boolean rx_supported; |
| 360 | if (not ispresent(caddr.contactParams)) { |
| 361 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 362 | log2str(g_name & ": Received unexpected empty Contact attributes (omit)")); |
| 363 | } |
| 364 | f_sip_param_match_value_or_fail(caddr.contactParams, "+g.3gpp.icsi-ref", "\"urn\\%3Aurn-7\\%3A3gpp-service.ims.icsi.mmtel\""); |
| 365 | f_sip_param_match_value_or_fail(caddr.contactParams, "+sip.instance", "\"<urn:gsma:imei:" & g_pars.subscr.imei & ">\""); |
| 366 | f_sip_param_match_value_or_fail(caddr.contactParams, "audio", omit); |
| 367 | |
| 368 | /* Check video support */ |
| 369 | param_tpl := f_sip_param_find(caddr.contactParams, "video"); |
| 370 | rx_supported := not istemplatekind(param_tpl, "omit"); |
| 371 | if (rx_supported) { |
| 372 | /* This attribute never has a value: */ |
| 373 | if (not istemplatekind(param_tpl.paramValue, "omit")) { |
| 374 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 375 | log2str(g_name & ": Received Contact with 'video' attribute containing a value := ", rx_contact)); |
| 376 | } |
| 377 | if (not g_pars.subscr.support_video) { |
| 378 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 379 | log2str(g_name & ": Received Contact with unexpected 'video' attribute := ", rx_contact)); |
| 380 | } |
| 381 | } else if (g_pars.subscr.support_video) { |
| 382 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 383 | log2str(g_name & ": Received Contact with missing 'video' attribute := ", rx_contact)); |
| 384 | } |
| 385 | |
| 386 | /* Check smsip support */ |
| 387 | param_tpl := f_sip_param_find(caddr.contactParams, "+g.3gpp.smsip"); |
| 388 | rx_supported := not istemplatekind(param_tpl, "omit"); |
| 389 | if (rx_supported) { |
| 390 | /* This attribute never has a value: */ |
| 391 | if (not istemplatekind(param_tpl.paramValue, "omit")) { |
| 392 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 393 | log2str(g_name & ": Received Contact with '+g.3gpp.smsip' attribute containing a value := ", rx_contact)); |
| 394 | } |
| 395 | if (not g_pars.subscr.support_smsip) { |
| 396 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 397 | log2str(g_name & ": Received Contact with unexpected '+g.3gpp.smsip' attribute := ", rx_contact)); |
| 398 | } |
| 399 | } else if (g_pars.subscr.support_smsip) { |
| 400 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 401 | log2str(g_name & ": Received Contact with missing '+g.3gpp.smsip' attribute := ", rx_contact)); |
| 402 | } |
| 403 | } |
| 404 | |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 405 | } |
| 406 | |
Pau Espin Pedrol | 0c5c647 | 2024-05-21 13:13:49 +0200 | [diff] [blame] | 407 | /* Validate P-Access-Network-Info: RFC7315 6.4 */ |
| 408 | private function f_ims_validate_register_P_Access_Network_info(PDU_SIP_Request req, |
| 409 | boolean exp_present := true) runs on IMS_ConnHdlr |
| 410 | |
| 411 | { |
| 412 | if (not exp_present) { |
| 413 | if (ispresent(g_rx_sip_req.msgHeader.p_access_network_info)) { |
| 414 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 415 | log2str(g_name & ": Received unexpected [rfc7315 6.4] P-Access-Info := ", |
| 416 | g_rx_sip_req.msgHeader.p_access_network_info)); |
| 417 | } |
| 418 | return; |
| 419 | } |
| 420 | |
| 421 | /* exp_present: */ |
| 422 | var template (present) P_Access_Network_Info expl_tmpl := |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 423 | tr_P_Access_Network_Info({ tr_Access_net_spec_EUTRAN(g_pars.subscr.uli_str) }); |
Pau Espin Pedrol | 0c5c647 | 2024-05-21 13:13:49 +0200 | [diff] [blame] | 424 | |
| 425 | if (not ispresent(g_rx_sip_req.msgHeader.p_access_network_info)) { |
| 426 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 427 | log2str(g_name & ": Received no P-Access-Info vs exp := ", |
| 428 | expl_tmpl)); |
| 429 | } |
| 430 | if (not match(g_rx_sip_req.msgHeader.p_access_network_info, expl_tmpl)) { |
| 431 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 432 | log2str(g_name & ": Received unexpected P-Access-Info := ", |
| 433 | g_rx_sip_req.msgHeader.p_access_network_info, |
| 434 | "\nvs exp := ", expl_tmpl)); |
| 435 | } |
| 436 | } |
| 437 | |
Pau Espin Pedrol | 1848ebf | 2024-06-21 17:43:39 +0200 | [diff] [blame] | 438 | /* GSMA IR.92 2.2.4 Call Establishment and Termination */ |
| 439 | private function f_ims_validate_INVITE_Contact(Contact rx_contact) runs on IMS_ConnHdlr |
| 440 | { |
| 441 | /* INVITE Contact header shows up like this: |
| 442 | * Contact: <sip:e05d8e82-8565-47b5-aca5-5f6b9164b074@192.168.101.2:44823>;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel";audio;+g.3gpp.mid-call;+g.3gpp.srvcc-alerting;+g.3gpp.ps2cs-srvcc-orig-pre-alerting |
| 443 | */ |
| 444 | if (ischosen(rx_contact.contactBody.wildcard)) { |
| 445 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 446 | log2str(g_name & ": Received unexpected Contact wildcard := ", rx_contact)); |
| 447 | } |
| 448 | var ContactAddress_List caddrs := rx_contact.contactBody.contactAddresses; |
| 449 | if (lengthof(caddrs) == 0) { |
| 450 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 451 | log2str(g_name & ": Received unexpected empty Contact Address list")); |
| 452 | } |
| 453 | for (var integer i := 0; i < lengthof(caddrs); i := i + 1) { |
| 454 | var ContactAddress caddr := caddrs[i]; |
Pau Espin Pedrol | 1848ebf | 2024-06-21 17:43:39 +0200 | [diff] [blame] | 455 | if (not ispresent(caddr.contactParams)) { |
| 456 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 457 | log2str(g_name & ": Received unexpected empty Contact attributes (omit)")); |
| 458 | } |
Pau Espin Pedrol | 0973899 | 2024-06-21 20:28:01 +0200 | [diff] [blame] | 459 | /* GSMA FCM.01 3.2.3.3: "The INVITE request contains Within the Contact header [...] the IMS |
| 460 | * Communication Service Identifier's (ICSI) for IMS Multimedia Telephony" */ |
| 461 | f_sip_param_match_value_or_fail(caddr.contactParams, "+g.3gpp.icsi-ref", "\"urn\\%3Aurn-7\\%3A3gpp-service.ims.icsi.mmtel\""); |
| 462 | /* "The UE must include the audio media feature tag, as defined in IETF RFC 3840, |
| 463 | * in the Contact header field of the SIP INVITE request, and in the Contact header |
| 464 | * field of the SIP response to the SIP INVITE request" */ |
Pau Espin Pedrol | 1848ebf | 2024-06-21 17:43:39 +0200 | [diff] [blame] | 465 | f_sip_param_match_value_or_fail(caddr.contactParams, "audio", omit); |
| 466 | } |
| 467 | } |
| 468 | |
Pau Espin Pedrol | 6088b89 | 2024-06-21 20:40:41 +0200 | [diff] [blame^] | 469 | /* Validate P-Preferred-Service: GSMA FCM.01 3.2.3.3 */ |
| 470 | private function f_ims_validate_invite_P_Preferred_Service(PDU_SIP_Request req, |
| 471 | boolean exp_present := true) runs on IMS_ConnHdlr |
| 472 | |
| 473 | { |
| 474 | if (not exp_present) { |
| 475 | if (ispresent(g_rx_sip_req.msgHeader.p_preferred_service)) { |
| 476 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 477 | log2str(g_name & ": Received unexpected [rfc6050] P-Preferred-Service := ", |
| 478 | g_rx_sip_req.msgHeader.p_preferred_service)); |
| 479 | } |
| 480 | return; |
| 481 | } |
| 482 | |
| 483 | /* exp_present: */ |
| 484 | var template (present) P_Preferred_Service expl_tmpl := |
| 485 | tr_P_Preferred_Service({ "urn:urn-7:3gpp-service.ims.icsi.mmtel" }); |
| 486 | |
| 487 | if (not ispresent(g_rx_sip_req.msgHeader.p_preferred_service)) { |
| 488 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 489 | log2str(g_name & ": Received no P-Access-Info vs exp := ", |
| 490 | expl_tmpl)); |
| 491 | } |
| 492 | if (not match(g_rx_sip_req.msgHeader.p_preferred_service, expl_tmpl)) { |
| 493 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 494 | log2str(g_name & ": Received unexpected P-Preferred-Service := ", |
| 495 | g_rx_sip_req.msgHeader.p_preferred_service, |
| 496 | "\nvs exp := ", expl_tmpl)); |
| 497 | } |
| 498 | } |
| 499 | |
Pau Espin Pedrol | 1177ca6 | 2024-06-21 18:53:01 +0200 | [diff] [blame] | 500 | /* GSMA IR.92 2.2.4 Call Establishment and Termination */ |
| 501 | private function f_ims_validate_INVITE_SDP(SDP_Message sdp) runs on IMS_ConnHdlr |
| 502 | { |
| 503 | /* "The UE must indicate in the SDP of the initial INVITE that the audio media |
| 504 | * is send-receive i.e. either by including the direction attribute "a=sendrecv" |
| 505 | * or by omitting the direction attributes. */ |
| 506 | if (ispresent(sdp.attributes)) { |
| 507 | if (match (sdp.attributes, superset(tr_SDP_recvonly)) or |
| 508 | match (sdp.attributes, superset(tr_SDP_sendonly))) { |
| 509 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 510 | log2str(g_name & ": Unexpected SDP direction attribute != sendrecv: ", |
| 511 | sdp.attributes)); |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 516 | private function f_ims_parse_security_client(Security_client security_client) runs on IMS_ConnHdlr |
| 517 | { |
| 518 | var boolean found := false; |
| 519 | for (var integer i := 0; i < lengthof(security_client.sec_mechanism_list); i := i + 1) { |
| 520 | var Security_mechanism sec_mec := security_client.sec_mechanism_list[i]; |
| 521 | if (sec_mec.mechanism_name != "ipsec-3gpp") { |
| 522 | log("Skipping Security Mechansim: ", sec_mec.mechanism_name); |
| 523 | continue; |
| 524 | } |
| 525 | var SemicolonParam_List sec_pars := sec_mec.mechanism_params; |
| 526 | var charstring par_val; |
| 527 | par_val := f_sip_param_get_value_present_or_fail(sec_pars, "alg"); |
| 528 | if (par_val != "hmac-sha-1-96") { |
| 529 | log("Skipping Security Mechansim Algo: ", par_val); |
| 530 | continue; |
| 531 | } |
| 532 | par_val := f_sip_param_get_value_present_or_fail(sec_pars, "spi-c"); |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 533 | g_pars.subscr.ipsec_remote_spi_c := str2int(par_val); |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 534 | par_val := f_sip_param_get_value_present_or_fail(sec_pars, "spi-s"); |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 535 | g_pars.subscr.ipsec_remote_spi_s := str2int(par_val); |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 536 | par_val := f_sip_param_get_value_present_or_fail(sec_pars, "port-c"); |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 537 | g_pars.subscr.ipsec_remote_port_c := str2int(par_val); |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 538 | par_val := f_sip_param_get_value_present_or_fail(sec_pars, "port-s"); |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 539 | g_pars.subscr.ipsec_remote_port_s := str2int(par_val); |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 540 | found := true; |
| 541 | break; |
| 542 | } |
| 543 | |
| 544 | if (not found) { |
| 545 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 546 | log2str(g_name & "alg=hmac-sha-1-96 not found: ", security_client)); |
| 547 | } |
| 548 | |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 549 | log("ipsec: remote_spi_c=", g_pars.subscr.ipsec_remote_spi_c, " remote_spi_s=", g_pars.subscr.ipsec_remote_spi_s, |
| 550 | "local_spi_c=", g_pars.subscr.ipsec_local_spi_c, " local_spi_s=", g_pars.subscr.ipsec_local_spi_s); |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 551 | } |
| 552 | |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 553 | private function f_ims_parse_register_contact(Contact contact) runs on IMS_ConnHdlr |
| 554 | { |
| 555 | var HostPort hp := valueof(contact.contactBody.contactAddresses[0].addressField.nameAddr.addrSpec.hostPort); |
| 556 | |
| 557 | g_pars.subscr.remote_sip_host := hp.host; |
| 558 | if (ispresent(hp.portField)) { |
| 559 | g_pars.subscr.remote_sip_port := hp.portField; |
| 560 | } else { |
| 561 | g_pars.subscr.remote_sip_port := 5060; |
| 562 | } |
| 563 | } |
| 564 | |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 565 | private function f_IMS_exec_sync(charstring cmdline, template (present) integer rc := 0) |
| 566 | runs on IMS_ConnHdlr return ASP_PResult { |
| 567 | var ASP_PResult res; |
| 568 | |
| 569 | map(self:PIPE, system:PIPE); |
| 570 | res := f_PIPEasp_exec_sync_PResult(PIPE, cmdline, tr_PResult(?, ?, rc)); |
| 571 | unmap(self:PIPE, system:PIPE); |
| 572 | |
| 573 | return res; |
| 574 | } |
| 575 | |
| 576 | private function f_ims_setup_ipsec() runs on IMS_ConnHdlr |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 577 | { |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 578 | var ASP_PResult res; |
| 579 | |
| 580 | var charstring cmd := mp_ipsec_setup_script_path & " " & |
| 581 | g_pars.local_sip_host & " " & |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 582 | int2str(g_pars.local_sip_port) & " " & int2str(g_pars.subscr.ipsec_local_spi_c) & " " & |
| 583 | int2str(g_pars.local_sip_port) & " " & int2str(g_pars.subscr.ipsec_local_spi_s) & " " & |
| 584 | g_pars.subscr.remote_sip_host & " " & |
| 585 | int2str(g_pars.subscr.ipsec_remote_port_c) & " " & int2str(g_pars.subscr.ipsec_remote_spi_c) & " " & |
| 586 | int2str(g_pars.subscr.ipsec_remote_port_s) & " " & int2str(g_pars.subscr.ipsec_remote_spi_s) & " " & |
| 587 | g_pars.subscr.ipsec_auth_key; |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 588 | |
| 589 | res := f_IMS_exec_sync(cmd); |
| 590 | |
| 591 | /* Debug applied rules: */ |
| 592 | /* |
| 593 | res := f_IMS_exec_sync("ip xfrm state"); |
| 594 | log("ip-xfrm-state Result-Stdout: " & res.stdout); |
| 595 | |
| 596 | res := f_IMS_exec_sync("ip xfrm policy"); |
| 597 | log("ip-xfrm-policy Result-Stdout: " & res.stdout); |
| 598 | */ |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 599 | } |
| 600 | |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 601 | private function f_tr_Via_response(Via via_req) return template (present) Via { |
| 602 | template (present) SemicolonParam_List via_resp_params := ?; |
| 603 | |
| 604 | /*via_resp_params := { |
| 605 | { id := "rport", paramValue := int2str(g_pars.subscr.remote_sip_port.subscr.remote_sip_port) }, |
| 606 | { id := "received", paramValue := g_pars.subscr.remote_sip_host } |
| 607 | }; */ |
| 608 | return tr_Via_from(via_req.viaBody[0].sentBy, |
| 609 | via_req.viaBody[0].sentProtocol.transport, |
| 610 | via_resp_params); |
| 611 | } |
| 612 | |
| 613 | private function f_tr_From(template (value) SipAddr from_req) return template (present) SipAddr { |
| 614 | return tr_SipAddr_from_val(from_req); |
| 615 | } |
| 616 | |
| 617 | private altstep as_SIP_expect_req(template (present) PDU_SIP_Request sip_expect, boolean fail_others := true) runs on IMS_ConnHdlr |
| 618 | { |
| 619 | var charstring sip_expect_str := log2str(sip_expect); |
| 620 | [] SIP.receive(sip_expect) -> value g_rx_sip_req; |
| 621 | [fail_others] as_SIP_fail_req(sip_expect_str); |
| 622 | [fail_others] as_SIP_fail_resp(sip_expect_str); |
| 623 | } |
| 624 | |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 625 | type enumerated IMS_gen_sdp_state { |
| 626 | IMS_GEN_SDP_None, |
Pau Espin Pedrol | dc3c970 | 2024-06-20 14:29:26 +0200 | [diff] [blame] | 627 | IMS_GEN_SDP_MO_INVITE, |
| 628 | IMS_GEN_SDP_MO_UPDATE, |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 629 | IMS_GEN_SDP_MT_Session_Progress, |
| 630 | IMS_GEN_SDP_MT_UPDATE_200OK |
| 631 | } |
| 632 | |
| 633 | private function f_gen_sdp(IMS_gen_sdp_state st := IMS_GEN_SDP_None) runs on IMS_ConnHdlr return charstring { |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 634 | var charstring sdp := |
| 635 | "v=0\r\n" & |
| 636 | "o=0502 2390 1824 IN IP4 " & g_pars.subscr.cp.local_rtp_addr & "\r\n" & |
| 637 | "s=Talk\r\n" & |
| 638 | "c=IN IP4 " & g_pars.subscr.cp.local_rtp_addr & "\r\n" & |
| 639 | "t=0 0\r\n" & |
| 640 | "a=rtcp-xr:rcvr-rtt=all:10000 stat-summary=loss,dup,jitt,TTL voip-metrics\r\n" & |
| 641 | "a=record:off\r\n" & |
| 642 | "m=audio " & int2str(g_pars.subscr.cp.local_rtp_port) & " RTP/AVP 8 96 97 98 0 18 99 100 101\r\n" & |
| 643 | "a=rtpmap:8 PCMA/8000\r\n" & |
| 644 | "a=rtpmap:96 opus/48000/2\r\n" & |
| 645 | "a=fmtp:96 useinbandfec=1\r\n" & |
| 646 | "a=rtpmap:97 speex/16000\r\n" & |
| 647 | "a=fmtp:97 vbr=on\r\n" & |
| 648 | "a=rtpmap:98 speex/8000\r\n" & |
| 649 | "a=fmtp:98 vbr=on\r\n" & |
| 650 | "a=fmtp:18 annexb=yes\r\n" & |
| 651 | "a=rtpmap:99 telephone-event/48000\r\n" & |
| 652 | "a=rtpmap:100 telephone-event/16000\r\n" & |
| 653 | "a=rtpmap:101 telephone-event/8000\r\n" & |
| 654 | "a=rtcp:" & int2str(g_pars.subscr.cp.local_rtp_port + 1) & "\r\n" & |
| 655 | "a=rtcp-fb:* trr-int 1000\r\n" & |
| 656 | "a=rtcp-fb:* ccm tmmbr\r\n"; |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 657 | select (st) { |
| 658 | case (IMS_GEN_SDP_None) { |
| 659 | } |
Pau Espin Pedrol | dc3c970 | 2024-06-20 14:29:26 +0200 | [diff] [blame] | 660 | case (IMS_GEN_SDP_MO_INVITE) { |
| 661 | sdp := sdp & |
| 662 | "a=curr:qos local none\r\n" & |
| 663 | "a=curr:qos remote none\r\n" & |
| 664 | "a=des:qos mandatory local sendrecv\r\n" & |
| 665 | "a=des:qos optional remote sendrecv\r\n"; |
| 666 | } |
| 667 | case (IMS_GEN_SDP_MO_UPDATE) { |
| 668 | sdp := sdp & |
| 669 | "a=curr:qos local sendrecv\r\n" & |
| 670 | "a=curr:qos remote none\r\n" & |
| 671 | "a=des:qos mandatory local sendrecv\r\n" & |
| 672 | "a=des:qos mandatory remote sendrecv\r\n"; |
| 673 | } |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 674 | case (IMS_GEN_SDP_MT_Session_Progress) { |
| 675 | sdp := sdp & |
| 676 | "a=curr:qos local none\r\n" & |
| 677 | "a=curr:qos remote none\r\n" & |
| 678 | "a=des:qos mandatory local sendrecv\r\n" & |
| 679 | "a=des:qos mandatory remote sendrecv\r\n" & |
| 680 | "a=conf:qos remote sendrecv\r\n"; |
| 681 | } |
| 682 | case (IMS_GEN_SDP_MT_UPDATE_200OK) { |
| 683 | sdp := sdp & |
| 684 | "a=curr:qos local sendrecv\r\n" & |
| 685 | "a=curr:qos remote sendrecv\r\n" & |
| 686 | "a=des:qos mandatory local sendrecv\r\n" & |
| 687 | "a=des:qos mandatory remote sendrecv\r\n"; |
| 688 | } |
| 689 | } |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 690 | return sdp; |
| 691 | } |
| 692 | |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 693 | private function f_gen_Security_server() runs on IMS_ConnHdlr return Security_server { |
| 694 | var template (value) Security_server security_server; |
| 695 | /* Security-Server: ipsec-3gpp;q=0.1;prot=esp;mod=trans;spi-c=4096;spi-s=4097;port-c=5104;port-s=6104;alg=hmac-sha-1-96;ealg=null */ |
| 696 | var template (value) SemicolonParam_List sec_params := { |
| 697 | ts_Param("q", "0.1"), |
| 698 | ts_Param("prot", "esp"), |
| 699 | ts_Param("mod", "trans"), |
| 700 | ts_Param("spi-c", int2str(g_pars.subscr.ipsec_local_spi_c)), |
| 701 | ts_Param("spi-s", int2str(g_pars.subscr.ipsec_local_spi_s)), |
| 702 | ts_Param("port-c", int2str(g_pars.local_sip_port)), |
| 703 | ts_Param("port-s", int2str(g_pars.local_sip_port)), |
| 704 | ts_Param("alg", "hmac-sha-1-96"), |
| 705 | ts_Param("ealg", "null") |
| 706 | }; |
| 707 | security_server := ts_Security_server({ |
| 708 | ts_Security_mechanism("ipsec-3gpp", sec_params) |
| 709 | }); |
| 710 | return valueof(security_server); |
| 711 | } |
| 712 | |
| 713 | private function f_gen_WwwAuthenticate() runs on IMS_ConnHdlr return WwwAuthenticate { |
| 714 | var template (value) WwwAuthenticate wwwAuthenticate; |
| 715 | var template (value) CommaParam_List digestCln; |
| 716 | digestCln := { |
| 717 | ts_Param("realm", f_sip_str_quote(g_pars.realm)), |
| 718 | ts_Param("qop", f_sip_str_quote("auth")), |
| 719 | ts_Param("algorithm", "AKAv1-MD5"), |
| 720 | ts_Param("nonce", f_sip_str_quote(f_nonce_from_rand_autn(g_pars.subscr.auth.rand, |
| 721 | g_pars.subscr.auth.autn))) |
| 722 | /* "opaque not needed in IMS "*/ |
| 723 | }; |
| 724 | wwwAuthenticate := ts_WwwAuthenticate( { ts_Challenge_digestCln(digestCln) } ); |
| 725 | return valueof(wwwAuthenticate); |
| 726 | } |
| 727 | |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 728 | type enumerated IMS_register_early_return { |
| 729 | IMS_REG_EARLY_RET_BEFORE_None, |
| 730 | IMS_REG_EARLY_RET_BEFORE_Initial_100Trying, |
| 731 | IMS_REG_EARLY_RET_BEFORE_Initial_401Unauthorized, |
| 732 | IMS_REG_EARLY_RET_BEFORE_Resync_401Unauthorized, |
| 733 | IMS_REG_EARLY_RET_BEFORE_Protected_100Trying, |
| 734 | IMS_REG_EARLY_RET_BEFORE_Protected_200OK |
| 735 | } |
| 736 | |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 737 | /* Peer is issuing 1st register, accept it: */ |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 738 | altstep as_IMS_register(boolean exp_auth_resync := false, |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 739 | IMS_register_early_return early_ret := IMS_REG_EARLY_RET_BEFORE_None, |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 740 | boolean fail_others := true) runs on IMS_ConnHdlr |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 741 | { |
| 742 | var template (present) PDU_SIP_Request exp_req := |
| 743 | tr_SIP_REGISTER(g_pars.registrar_sip_req_uri, |
| 744 | ?, |
Pau Espin Pedrol | 41b0e07 | 2024-05-29 18:25:51 +0200 | [diff] [blame] | 745 | tr_From(), |
| 746 | tr_To(), |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 747 | tr_Via_from(?), |
Pau Espin Pedrol | cb0dbf9 | 2024-06-06 20:40:30 +0200 | [diff] [blame] | 748 | expires := tr_Expires(int2str(c_def_expires)), |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 749 | require := tr_Require(superset("sec-agree")), |
| 750 | security_client := tr_Security_client(superset(tr_Security_mechanism("ipsec-3gpp", |
| 751 | superset(tr_Param("alg","hmac-sha-1-96"))))), |
| 752 | supported := tr_Supported(superset("path", "sec-agree"))); |
| 753 | var charstring sip_expect_str := log2str(exp_req); |
| 754 | |
| 755 | [] SIP.receive(exp_req) -> value g_rx_sip_req { |
| 756 | var template (value) PDU_SIP_Response tx_resp; |
| 757 | var Via via; |
| 758 | var CallidString sip_call_id; |
Pau Espin Pedrol | 41b0e07 | 2024-05-29 18:25:51 +0200 | [diff] [blame] | 759 | var template (value) From from_addr; |
| 760 | var template (value) To to_addr; |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 761 | var WwwAuthenticate wwwAuthenticate; |
| 762 | var Security_server security_server; |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 763 | var template (value) Require require := ts_Require({"sec-agree"}); |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 764 | var template (value) Supported supported := ts_Supported({"sec-agree"}); |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 765 | var integer sip_seq_nr; |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 766 | |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 767 | if (early_ret == IMS_REG_EARLY_RET_BEFORE_Initial_100Trying) { |
| 768 | return; /* Done */ |
| 769 | } |
| 770 | |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 771 | sip_call_id := g_rx_sip_req.msgHeader.callId.callid; |
| 772 | via := g_rx_sip_req.msgHeader.via; |
| 773 | via.viaBody[0].viaParams := f_sip_param_set(via.viaBody[0].viaParams, "rport", "1234"); /* TODO: set remote src port of the REGISTER */ |
Pau Espin Pedrol | 41b0e07 | 2024-05-29 18:25:51 +0200 | [diff] [blame] | 774 | from_addr := g_rx_sip_req.msgHeader.fromField; |
| 775 | to_addr := g_rx_sip_req.msgHeader.toField; |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 776 | sip_seq_nr := g_rx_sip_req.msgHeader.cSeq.seqNumber; |
| 777 | |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 778 | /* Tx 100 Tyring */ |
| 779 | tx_resp := ts_SIP_Response_Trying(sip_call_id, |
| 780 | from_addr, |
| 781 | to_addr, |
| 782 | via, |
| 783 | sip_seq_nr, |
| 784 | "REGISTER", |
| 785 | allow := omit, |
| 786 | server := g_pars.server_name, |
| 787 | userAgent := omit); |
| 788 | SIP.send(tx_resp); |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 789 | |
Pau Espin Pedrol | 0c5c647 | 2024-05-21 13:13:49 +0200 | [diff] [blame] | 790 | /* Validate P-Access-Network-Info: rfc7315 6.4: |
| 791 | * "3GPP will use the P-Access-Network-Info header field to |
| 792 | * carry relatively sensitive information like the cell ID. Therefore, |
| 793 | * the information MUST NOT be sent outside of the 3GPP domain."" |
| 794 | * [...] "the sensitive information carried in the |
| 795 | * P-Access-Network-Info header field MUST NOT be sent in any initial |
| 796 | * unauthenticated and unprotected requests (e.g., REGISTER)." |
| 797 | */ |
| 798 | f_ims_validate_register_P_Access_Network_info(g_rx_sip_req, exp_present := false); |
| 799 | |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 800 | f_ims_validate_register_contact(g_rx_sip_req.msgHeader.contact); |
| 801 | f_ims_parse_register_contact(g_rx_sip_req.msgHeader.contact); |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 802 | f_ims_parse_security_client(g_rx_sip_req.msgHeader.security_client); |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 803 | |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 804 | if (early_ret == IMS_REG_EARLY_RET_BEFORE_Initial_401Unauthorized) { |
| 805 | return; /* Done */ |
| 806 | } |
| 807 | |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 808 | if (not exp_auth_resync) { |
| 809 | /* Delay ipsec setup in ip xfrm, since there will be another |
| 810 | * 1st REGISTER with potentially new ports coming in later. */ |
| 811 | f_ims_setup_ipsec(); |
| 812 | } |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 813 | |
Pau Espin Pedrol | 41b0e07 | 2024-05-29 18:25:51 +0200 | [diff] [blame] | 814 | to_addr.toParams := f_sip_param_set(to_addr.toParams, "tag", f_sip_rand_tag()); |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 815 | wwwAuthenticate := f_gen_WwwAuthenticate(); |
| 816 | security_server := f_gen_Security_server(); |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 817 | |
| 818 | /* Tx 401 Unauthorized */ |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 819 | tx_resp := ts_SIP_Response_Unauthorized(sip_call_id, |
| 820 | from_addr, |
| 821 | to_addr, |
| 822 | via, |
| 823 | wwwAuthenticate, |
| 824 | sip_seq_nr, |
| 825 | "REGISTER", |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 826 | p_associated_uri := g_pars.subscr.p_associated_uri, |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 827 | security_server := security_server, |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 828 | server := g_pars.server_name, |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 829 | supported := supported, |
| 830 | userAgent := omit); |
| 831 | SIP.send(tx_resp); |
| 832 | |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 833 | if (exp_auth_resync) { |
| 834 | /* Now we should receive a new non-protected REGISTER |
| 835 | * with Authoritzation containing auts in base64: */ |
| 836 | var template (present) Authorization authorization := |
| 837 | f_tr_Authorization_AKAv1MD5(wwwAuthenticate, |
| 838 | g_pars.subscr.imsi & "@" & g_pars.realm, |
| 839 | f_sip_SipUrl_to_str(g_pars.registrar_sip_req_uri)); |
| 840 | exp_req := |
| 841 | tr_SIP_REGISTER(g_pars.registrar_sip_req_uri, |
| 842 | ?, |
| 843 | tr_From(), |
| 844 | tr_To(), |
| 845 | tr_Via_from(f_tr_HostPort(via.viaBody[0].sentBy.host, via.viaBody[0].sentBy.portField)), |
| 846 | authorization := authorization); |
| 847 | SIP.receive(exp_req) -> value g_rx_sip_req; |
| 848 | |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 849 | if (early_ret == IMS_REG_EARLY_RET_BEFORE_Resync_401Unauthorized) { |
| 850 | return; /* Done */ |
| 851 | } |
| 852 | |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 853 | via := g_rx_sip_req.msgHeader.via; |
| 854 | from_addr := g_rx_sip_req.msgHeader.fromField; |
| 855 | to_addr := g_rx_sip_req.msgHeader.toField; |
| 856 | sip_seq_nr := g_rx_sip_req.msgHeader.cSeq.seqNumber; |
| 857 | |
| 858 | /* Tx 100 Tyring */ |
| 859 | tx_resp := ts_SIP_Response_Trying(sip_call_id, |
| 860 | from_addr, |
| 861 | to_addr, |
| 862 | via, |
| 863 | sip_seq_nr, |
| 864 | "REGISTER", |
| 865 | allow := omit, |
| 866 | server := g_pars.server_name, |
| 867 | userAgent := omit); |
| 868 | SIP.send(tx_resp); |
| 869 | |
| 870 | f_sip_param_match_value_or_fail(g_rx_sip_req.msgHeader.authorization.body.digestResponse, |
| 871 | "auts", f_sip_str_quote(enc_MIME_Base64(g_pars.subscr.auth.auts))); |
| 872 | f_ims_validate_register_P_Access_Network_info(g_rx_sip_req, exp_present := false); |
| 873 | f_ims_validate_register_contact(g_rx_sip_req.msgHeader.contact); |
| 874 | f_ims_parse_register_contact(g_rx_sip_req.msgHeader.contact); |
| 875 | f_ims_parse_security_client(g_rx_sip_req.msgHeader.security_client); |
| 876 | f_ims_setup_ipsec(); |
| 877 | |
| 878 | security_server := f_gen_Security_server(); |
| 879 | |
| 880 | /* Tx again 401 Unauthorized, this time our AMI interface will accept it: */ |
| 881 | tx_resp := ts_SIP_Response_Unauthorized(sip_call_id, |
| 882 | from_addr, |
| 883 | to_addr, |
| 884 | via, |
| 885 | wwwAuthenticate, |
| 886 | sip_seq_nr, |
| 887 | "REGISTER", |
| 888 | p_associated_uri := g_pars.subscr.p_associated_uri, |
| 889 | security_server := security_server, |
| 890 | server := g_pars.server_name, |
| 891 | supported := supported, |
| 892 | userAgent := omit); |
| 893 | SIP.send(tx_resp); |
| 894 | } |
| 895 | |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 896 | /* Now we should receive a new REGISTER over ipsec: */ |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 897 | as_IMS_2nd_register(wwwAuthenticate, early_ret := early_ret); |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 898 | } |
| 899 | [fail_others] as_SIP_fail_resp(sip_expect_str); |
| 900 | [fail_others] as_SIP_fail_req(sip_expect_str); |
| 901 | |
| 902 | } |
| 903 | |
| 904 | /* Peer is issuing 2nd register, accept it: */ |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 905 | altstep as_IMS_2nd_register(WwwAuthenticate wwwAuthenticate, |
| 906 | IMS_register_early_return early_ret := IMS_REG_EARLY_RET_BEFORE_None, |
| 907 | boolean fail_others := true) runs on IMS_ConnHdlr |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 908 | { |
| 909 | var template (present) Authorization authorization := |
| 910 | f_tr_Authorization_AKAv1MD5(wwwAuthenticate, |
| 911 | g_pars.subscr.imsi & "@" & g_pars.realm, |
| 912 | f_sip_SipUrl_to_str(g_pars.registrar_sip_req_uri)); |
| 913 | var template (present) PDU_SIP_Request exp_req := |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 914 | tr_SIP_REGISTER(g_pars.registrar_sip_req_uri, |
| 915 | ?, |
Pau Espin Pedrol | 41b0e07 | 2024-05-29 18:25:51 +0200 | [diff] [blame] | 916 | tr_From(), |
| 917 | tr_To(), |
Pau Espin Pedrol | 480b53c | 2024-06-07 19:49:02 +0200 | [diff] [blame] | 918 | tr_Via_from(f_tr_HostPort(g_pars.subscr.remote_sip_host, g_pars.subscr.ipsec_remote_port_s)), |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 919 | authorization := authorization); |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 920 | var charstring sip_expect_str := log2str(exp_req); |
| 921 | |
| 922 | [] SIP.receive(exp_req) -> value g_rx_sip_req { |
| 923 | var template (value) PDU_SIP_Response tx_resp; |
| 924 | var Via via; |
| 925 | var CallidString sip_call_id; |
| 926 | var template (value) From from_addr; |
| 927 | var template (value) To to_addr; |
| 928 | var template (value) Require require := ts_Require({"sec-agree"}); |
| 929 | var template (value) Supported supported := ts_Supported({"sec-agree"}); |
| 930 | var integer sip_seq_nr; |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 931 | |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 932 | if (early_ret == IMS_REG_EARLY_RET_BEFORE_Protected_100Trying) { |
| 933 | return; /* Done */ |
| 934 | } |
| 935 | |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 936 | sip_call_id := g_rx_sip_req.msgHeader.callId.callid; |
| 937 | via := g_rx_sip_req.msgHeader.via; |
Pau Espin Pedrol | 41b0e07 | 2024-05-29 18:25:51 +0200 | [diff] [blame] | 938 | from_addr := g_rx_sip_req.msgHeader.fromField; |
| 939 | to_addr := g_rx_sip_req.msgHeader.toField; |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 940 | sip_seq_nr := g_rx_sip_req.msgHeader.cSeq.seqNumber; |
| 941 | |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 942 | /* Tx 100 Trying */ |
| 943 | tx_resp := ts_SIP_Response_Trying(sip_call_id, |
| 944 | from_addr, |
| 945 | to_addr, |
| 946 | via, |
| 947 | sip_seq_nr, |
| 948 | "REGISTER", |
| 949 | allow := omit, |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 950 | server := g_pars.server_name, |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 951 | userAgent := omit); |
| 952 | SIP.send(tx_resp); |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 953 | |
Pau Espin Pedrol | 80b981a | 2024-06-04 18:37:22 +0200 | [diff] [blame] | 954 | /* Validate Digest Response: */ |
| 955 | f_ims_validate_Authorization_AKAv1MD5_Response(g_rx_sip_req.msgHeader.authorization, "REGISTER"); |
| 956 | |
Pau Espin Pedrol | 0c5c647 | 2024-05-21 13:13:49 +0200 | [diff] [blame] | 957 | /* Validate P-Access-Network-Info: */ |
| 958 | f_ims_validate_register_P_Access_Network_info(g_rx_sip_req, exp_present := true); |
| 959 | |
Pau Espin Pedrol | 50db4c9 | 2024-06-11 18:02:52 +0200 | [diff] [blame] | 960 | if (early_ret == IMS_REG_EARLY_RET_BEFORE_Protected_200OK) { |
| 961 | return; /* Done */ |
| 962 | } |
| 963 | |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 964 | g_pars.subscr.p_associated_uri := valueof(ts_P_Associated_Uri({ |
Pau Espin Pedrol | 4e6672c | 2024-05-22 17:03:53 +0200 | [diff] [blame] | 965 | ts_P_Assoc_uri_spec(ts_NameAddr(ts_SipUrl(ts_HostPort(g_pars.realm), |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 966 | ts_UserInfo(g_pars.subscr.msisdn), |
Pau Espin Pedrol | 4e6672c | 2024-05-22 17:03:53 +0200 | [diff] [blame] | 967 | scheme := "sip"))), |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 968 | ts_P_Assoc_uri_spec(ts_NameAddr(ts_SipUrl(ts_HostPort(g_pars.subscr.msisdn), |
Pau Espin Pedrol | 4e6672c | 2024-05-22 17:03:53 +0200 | [diff] [blame] | 969 | omit, |
| 970 | scheme := "tel"))), |
| 971 | ts_P_Assoc_uri_spec(g_rx_sip_req.msgHeader.toField.addressField.nameAddr) |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 972 | })); |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 973 | f_ims_validate_register_contact(g_rx_sip_req.msgHeader.contact); |
| 974 | f_ims_parse_register_contact(g_rx_sip_req.msgHeader.contact); |
| 975 | g_pars.subscr.registered_contact := g_rx_sip_req.msgHeader.contact; |
Pau Espin Pedrol | 4e6672c | 2024-05-22 17:03:53 +0200 | [diff] [blame] | 976 | |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 977 | /* Tx 200 OK */ |
Pau Espin Pedrol | 41b0e07 | 2024-05-29 18:25:51 +0200 | [diff] [blame] | 978 | to_addr.toParams := f_sip_param_set(to_addr.toParams, "tag", f_sip_rand_tag()); |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 979 | tx_resp := ts_SIP_Response(sip_call_id, |
| 980 | from_addr, |
| 981 | to_addr, |
| 982 | "REGISTER", 200, |
| 983 | sip_seq_nr, |
| 984 | "OK", |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 985 | via, |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 986 | p_associated_uri := g_pars.subscr.p_associated_uri, |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 987 | require := require, |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 988 | server := g_pars.server_name, |
Pau Espin Pedrol | a674d61 | 2024-05-14 19:56:33 +0200 | [diff] [blame] | 989 | supported := supported, |
| 990 | userAgent := omit); |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 991 | SIP.send(tx_resp); |
| 992 | } |
| 993 | [fail_others] as_SIP_fail_resp(sip_expect_str); |
| 994 | [fail_others] as_SIP_fail_req(sip_expect_str); |
Pau Espin Pedrol | a2812ec | 2024-05-10 20:30:44 +0200 | [diff] [blame] | 995 | } |
| 996 | |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 997 | /* Peer wants to unregister, accept it: */ |
| 998 | altstep as_IMS_unregister(boolean fail_others := true) runs on IMS_ConnHdlr |
| 999 | { |
| 1000 | var template (present) PDU_SIP_Request exp_req := |
| 1001 | tr_SIP_REGISTER(g_pars.registrar_sip_req_uri, |
| 1002 | ?, |
| 1003 | tr_From(), |
| 1004 | tr_To(), |
Pau Espin Pedrol | 480b53c | 2024-06-07 19:49:02 +0200 | [diff] [blame] | 1005 | tr_Via_from(f_tr_HostPort(g_pars.subscr.remote_sip_host, g_pars.subscr.ipsec_remote_port_s)), |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 1006 | expires := tr_Expires(int2str(0)), |
| 1007 | require := tr_Require(superset("sec-agree")), |
| 1008 | security_client := tr_Security_client(superset(tr_Security_mechanism("ipsec-3gpp", |
| 1009 | superset(tr_Param("alg","hmac-sha-1-96"))))), |
| 1010 | supported := tr_Supported(superset("path", "sec-agree"))); |
| 1011 | var charstring sip_expect_str := log2str(exp_req); |
| 1012 | |
| 1013 | [] SIP.receive(exp_req) -> value g_rx_sip_req { |
| 1014 | var template (value) PDU_SIP_Response tx_resp; |
| 1015 | var Via via; |
| 1016 | var CallidString sip_call_id; |
| 1017 | var Contact contact; |
| 1018 | var template (value) From from_addr; |
| 1019 | var template (value) To to_addr; |
| 1020 | var template (value) CommaParam_List digestCln ; |
| 1021 | var template (value) WwwAuthenticate wwwAuthenticate; |
| 1022 | var template (value) Security_server security_server; |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 1023 | var template (value) Require require := ts_Require({"sec-agree"}); |
| 1024 | var template (value) Supported supported := ts_Supported({"sec-agree"}); |
| 1025 | var template (present) Authorization authorization; |
| 1026 | var integer sip_seq_nr; |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 1027 | |
| 1028 | sip_call_id := g_rx_sip_req.msgHeader.callId.callid; |
| 1029 | via := g_rx_sip_req.msgHeader.via; |
| 1030 | via.viaBody[0].viaParams := f_sip_param_set(via.viaBody[0].viaParams, "rport", "1234"); /* TODO: set remote src port of the REGISTER */ |
| 1031 | from_addr := g_rx_sip_req.msgHeader.fromField; |
| 1032 | to_addr := g_rx_sip_req.msgHeader.toField; |
| 1033 | sip_seq_nr := g_rx_sip_req.msgHeader.cSeq.seqNumber; |
| 1034 | |
| 1035 | contact := g_rx_sip_req.msgHeader.contact; |
| 1036 | f_ims_validate_register_contact(contact); |
| 1037 | |
Pau Espin Pedrol | f1963b3 | 2024-06-07 17:07:16 +0200 | [diff] [blame] | 1038 | /* Validate P-Access-Network-Info: 3GPP TS 24.229 5.1.2A.1.1 |
| 1039 | * "If available to the UE (as defined in the access technology specific annexes for each access technology), the UE shall |
| 1040 | * insert a P-Access-Network-Info header field into any request for a dialog, any subsequent request (except CANCEL |
| 1041 | * requests) or response (except CANCEL responses) within a dialog or any request for a standalone method (see |
| 1042 | * subclause 7.2A.4). Insertion of the P-Access-Network-Info header field into the ACK request is optional." |
| 1043 | */ |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 1044 | f_ims_validate_register_P_Access_Network_info(g_rx_sip_req, exp_present := true); |
| 1045 | |
Pau Espin Pedrol | f1963b3 | 2024-06-07 17:07:16 +0200 | [diff] [blame] | 1046 | |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 1047 | /* Tx 100 Tyring */ |
| 1048 | tx_resp := ts_SIP_Response_Trying(sip_call_id, |
| 1049 | from_addr, |
| 1050 | to_addr, |
| 1051 | via, |
| 1052 | sip_seq_nr, |
| 1053 | "REGISTER", |
| 1054 | allow := omit, |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 1055 | server := g_pars.server_name, |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 1056 | userAgent := omit); |
| 1057 | SIP.send(tx_resp); |
| 1058 | |
| 1059 | /* Change all Contact parameters to expires=0: */ |
| 1060 | for (var integer i := 0; i < lengthof(contact.contactBody.contactAddresses); i := i + 1) { |
| 1061 | contact.contactBody.contactAddresses[i].contactParams := valueof({ ts_Param("expires", "0") }); |
| 1062 | } |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 1063 | g_pars.subscr.registered_contact := omit; |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 1064 | /* Tx 200 OK */ |
| 1065 | to_addr.toParams := f_sip_param_set(to_addr.toParams, "tag", f_sip_rand_tag()); |
| 1066 | tx_resp := ts_SIP_Response(sip_call_id, |
| 1067 | from_addr, |
| 1068 | to_addr, |
| 1069 | "REGISTER", 200, |
| 1070 | sip_seq_nr, |
| 1071 | "OK", |
| 1072 | via, |
| 1073 | contact := contact, |
| 1074 | p_associated_uri := g_pars.subscr.p_associated_uri, |
| 1075 | require := require, |
Pau Espin Pedrol | 8e1bdd4 | 2024-06-10 20:13:48 +0200 | [diff] [blame] | 1076 | server := g_pars.server_name, |
Pau Espin Pedrol | 586eec5 | 2024-06-04 19:07:33 +0200 | [diff] [blame] | 1077 | supported := supported, |
| 1078 | userAgent := omit); |
| 1079 | SIP.send(tx_resp); |
| 1080 | } |
| 1081 | [fail_others] as_SIP_fail_resp(sip_expect_str); |
| 1082 | [fail_others] as_SIP_fail_req(sip_expect_str); |
| 1083 | } |
| 1084 | |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1085 | /* IMS Core starts a call towards the peer: 3GPP TS 24.229 5.1.3.1 */ |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 1086 | function f_IMS_mt_call_setup() runs on IMS_ConnHdlr |
| 1087 | { |
| 1088 | var template (value) PDU_SIP_Request req; |
| 1089 | var template (present) PDU_SIP_Response exp; |
| 1090 | var template (present) From from_addr_exp; |
| 1091 | var template (present) To to_addr_exp; |
| 1092 | var Via via; |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1093 | var template (omit) Require require := omit; |
| 1094 | var template (omit) Supported supported := omit; |
Pau Espin Pedrol | dc3c970 | 2024-06-20 14:29:26 +0200 | [diff] [blame] | 1095 | var charstring tx_sdp; |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 1096 | var default d_trying, d_ringing; |
| 1097 | var charstring branch_value; |
| 1098 | var Contact calling_contact; |
| 1099 | |
| 1100 | /* RFC 3261 8.1.1.3 From */ |
| 1101 | g_pars.subscr.cp.from_addr := valueof(ts_From(g_pars.subscr.cp.calling.addr, g_pars.subscr.cp.calling.params)); |
| 1102 | g_pars.subscr.cp.from_addr.fromParams := f_sip_param_set(g_pars.subscr.cp.from_addr.fromParams, "tag", f_sip_rand_tag()); |
| 1103 | g_pars.subscr.cp.to_addr := valueof(ts_To(g_pars.subscr.cp.called.addr, g_pars.subscr.cp.called.params)); |
| 1104 | from_addr_exp := tr_From(tr_Addr_Union_from_val(g_pars.subscr.cp.from_addr.addressField), *); |
| 1105 | to_addr_exp := tr_To(tr_Addr_Union_from_val(g_pars.subscr.cp.to_addr.addressField), *); |
| 1106 | branch_value := f_sip_gen_branch(f_sip_Addr_Union_to_str(g_pars.subscr.cp.from_addr.addressField), |
| 1107 | f_sip_Addr_Union_to_str(valueof(g_pars.subscr.cp.to_addr.addressField)), |
| 1108 | g_pars.subscr.cp.sip_call_id, |
| 1109 | g_pars.subscr.cp.sip_seq_nr); |
| 1110 | via := g_pars.local_via; |
| 1111 | via.viaBody[0].viaParams := f_sip_param_set(via.viaBody[0].viaParams, "branch", branch_value); |
| 1112 | |
| 1113 | calling_contact := valueof(ts_Contact({ |
| 1114 | ts_ContactAddress(g_pars.subscr.cp.calling.addr, omit) |
| 1115 | })); |
| 1116 | |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1117 | if (g_pars.subscr.cp.support_precondition_ext) { |
| 1118 | /* indicate the support for "reliable provisional response" |
| 1119 | * and "preconditions mechanism" */ |
| 1120 | supported := ts_Supported({ "100rel", "precondition" }); |
Pau Espin Pedrol | dc3c970 | 2024-06-20 14:29:26 +0200 | [diff] [blame] | 1121 | tx_sdp := f_gen_sdp(IMS_GEN_SDP_MO_INVITE); |
| 1122 | } else { |
| 1123 | /* Don't add any preconditions to SDP: */ |
| 1124 | tx_sdp := f_gen_sdp(IMS_GEN_SDP_None); |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1125 | } |
| 1126 | |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 1127 | req := ts_SIP_INVITE(g_pars.subscr.cp.sip_call_id, |
| 1128 | g_pars.subscr.cp.from_addr, |
| 1129 | g_pars.subscr.cp.to_addr, |
| 1130 | via, |
| 1131 | calling_contact, |
| 1132 | g_pars.subscr.cp.sip_seq_nr, |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1133 | supported := supported, |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 1134 | body := tx_sdp); |
| 1135 | |
| 1136 | SIP.send(req); |
| 1137 | |
| 1138 | /* Conditionally match and accept 100 Trying. */ |
| 1139 | exp := tr_SIP_Response_Trying(g_pars.subscr.cp.sip_call_id, |
| 1140 | from_addr_exp, |
| 1141 | to_addr_exp, |
| 1142 | f_tr_Via_response(via), |
| 1143 | g_pars.subscr.cp.sip_seq_nr, "INVITE"); |
| 1144 | d_trying := activate(as_SIP_ignore_resp(exp)); |
| 1145 | |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1146 | if (g_pars.subscr.cp.require_precondition_ext) { |
Pau Espin Pedrol | dc3c970 | 2024-06-20 14:29:26 +0200 | [diff] [blame] | 1147 | var template (present) SDP_attribute_list preconds; |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1148 | /* Rx 183 Session Progress */ |
| 1149 | exp := tr_SIP_Response_SessionProgress( |
| 1150 | g_pars.subscr.cp.sip_call_id, |
| 1151 | from_addr_exp, |
| 1152 | to_addr_exp, |
| 1153 | f_tr_Via_response(via), |
| 1154 | g_pars.subscr.cp.sip_seq_nr, "INVITE", |
| 1155 | require := tr_Require(superset("100rel", "precondition")), |
| 1156 | rseq := tr_RSeq(?)); |
| 1157 | alt { |
| 1158 | [] SIP.receive(exp) -> value g_rx_sip_resp; |
| 1159 | [] SIP.receive(tr_SIP_Response_Ringing(?, ?, ?)) -> value g_rx_sip_resp { |
| 1160 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 1161 | log2str(g_name & ": Expected 183 Session Progress instead of 180 Ringing: ", |
| 1162 | g_rx_sip_resp)); |
| 1163 | } |
| 1164 | } |
| 1165 | |
Pau Espin Pedrol | dc3c970 | 2024-06-20 14:29:26 +0200 | [diff] [blame] | 1166 | /* Validate SDP in Session Progress contains the preconditions: |
| 1167 | * a=curr:qos local none |
| 1168 | * a=curr:qos remote none |
| 1169 | * a=des:qos mandatory local sendrecv |
| 1170 | * a=des:qos mandatory remote sendrecv |
| 1171 | * a=conf:qos remote sendrecv |
| 1172 | */ |
| 1173 | preconds := superset( |
| 1174 | tr_SDP_curr(c_SDP_PRECON_STATUS_TYPE_local, c_SDP_PRECON_DIR_TAG_none), |
| 1175 | tr_SDP_curr(c_SDP_PRECON_STATUS_TYPE_remote, c_SDP_PRECON_DIR_TAG_none), |
| 1176 | tr_SDP_des(c_SDP_PRECON_STRENGTH_TAG_mandatory, c_SDP_PRECON_STATUS_TYPE_local, c_SDP_PRECON_DIR_TAG_sendrecv), |
| 1177 | tr_SDP_des(c_SDP_PRECON_STRENGTH_TAG_mandatory, c_SDP_PRECON_STATUS_TYPE_remote, c_SDP_PRECON_DIR_TAG_sendrecv), |
| 1178 | tr_SDP_conf(c_SDP_PRECON_STATUS_TYPE_remote, c_SDP_PRECON_DIR_TAG_sendrecv)); |
| 1179 | if (not ispresent(g_pars.subscr.cp.peer_sdp.attributes) or |
| 1180 | not match(g_pars.subscr.cp.peer_sdp.attributes, preconds)) { |
| 1181 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 1182 | log2str(g_name & ": Unexpected precondition attrs in Session Progress : ", |
| 1183 | g_pars.subscr.cp.peer_sdp.attributes)); |
| 1184 | } |
| 1185 | |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1186 | /* Tx PRACK */ |
| 1187 | req := ts_SIP_PRACK(g_pars.subscr.cp.to_addr.addressField.nameAddr.addrSpec, |
| 1188 | g_pars.subscr.cp.sip_call_id, |
| 1189 | g_pars.subscr.cp.from_addr, |
| 1190 | g_pars.subscr.cp.to_addr, |
| 1191 | via, |
| 1192 | g_rx_sip_resp.msgHeader.cSeq.seqNumber + 1, |
| 1193 | rack := ts_RAck(g_rx_sip_resp.msgHeader.rseq.response_num, |
| 1194 | g_rx_sip_resp.msgHeader.cSeq.seqNumber, |
| 1195 | "INVITE"), |
| 1196 | body := omit); |
| 1197 | SIP.send(req); |
| 1198 | |
Pau Espin Pedrol | 4d57206 | 2024-06-18 20:20:55 +0200 | [diff] [blame] | 1199 | if (g_pars.subscr.cp.mt.tx_coord_cmd_session_progress) { |
| 1200 | /* Signal used to inform that Dedicated bearer can be established: */ |
| 1201 | COORD.send(IMS_COORD_CMD_CALL_SESSION_PROGRESS); |
| 1202 | } |
| 1203 | |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1204 | /* Rx 200 OK (PRACK) */ |
| 1205 | exp := tr_SIP_Response(g_pars.subscr.cp.sip_call_id, |
| 1206 | from_addr_exp, |
| 1207 | to_addr_exp, |
| 1208 | f_tr_Via_response(via), |
| 1209 | omit, |
| 1210 | "PRACK", 200, |
| 1211 | g_rx_sip_resp.msgHeader.cSeq.seqNumber + 1, "OK", |
| 1212 | body := omit); |
| 1213 | as_SIP_expect_resp(exp, fail_others := false); |
| 1214 | |
| 1215 | /* Tx UPDATE */ |
Pau Espin Pedrol | dc3c970 | 2024-06-20 14:29:26 +0200 | [diff] [blame] | 1216 | tx_sdp := f_gen_sdp(IMS_GEN_SDP_MO_UPDATE); |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1217 | req := ts_SIP_UPDATE(g_pars.subscr.cp.to_addr.addressField.nameAddr.addrSpec, |
| 1218 | g_pars.subscr.cp.sip_call_id, |
| 1219 | g_pars.subscr.cp.from_addr, |
| 1220 | g_pars.subscr.cp.to_addr, |
| 1221 | via, |
| 1222 | g_rx_sip_resp.msgHeader.cSeq.seqNumber + 1, |
| 1223 | contact := calling_contact, |
| 1224 | require := ts_Require({"sec-agree", "precondition"}), |
| 1225 | body := tx_sdp); |
| 1226 | SIP.send(req); |
| 1227 | |
| 1228 | /* Rx 200 OK (UPDATE) */ |
| 1229 | exp := tr_SIP_Response(g_pars.subscr.cp.sip_call_id, |
| 1230 | from_addr_exp, |
| 1231 | to_addr_exp, |
| 1232 | f_tr_Via_response(via), |
| 1233 | omit, |
| 1234 | "UPDATE", 200, |
| 1235 | g_rx_sip_resp.msgHeader.cSeq.seqNumber + 1, "OK", |
| 1236 | body := ?); |
| 1237 | as_SIP_expect_resp(exp, fail_others := false); |
| 1238 | |
Pau Espin Pedrol | dc3c970 | 2024-06-20 14:29:26 +0200 | [diff] [blame] | 1239 | /* Validate SDP in 200 OK (UPDATE) contains the preconditions: |
| 1240 | * a=curr:qos local sendrecv |
| 1241 | * a=curr:qos remote sendrecv |
| 1242 | * a=des:qos mandatory local sendrecv |
| 1243 | * a=des:qos mandatory remote sendrecv |
| 1244 | */ |
| 1245 | preconds := superset( |
| 1246 | tr_SDP_curr(c_SDP_PRECON_STATUS_TYPE_local, c_SDP_PRECON_DIR_TAG_sendrecv), |
| 1247 | tr_SDP_curr(c_SDP_PRECON_STATUS_TYPE_remote, c_SDP_PRECON_DIR_TAG_sendrecv), |
| 1248 | tr_SDP_des(c_SDP_PRECON_STRENGTH_TAG_mandatory, c_SDP_PRECON_STATUS_TYPE_local, c_SDP_PRECON_DIR_TAG_sendrecv), |
| 1249 | tr_SDP_des(c_SDP_PRECON_STRENGTH_TAG_mandatory, c_SDP_PRECON_STATUS_TYPE_remote, c_SDP_PRECON_DIR_TAG_sendrecv)); |
| 1250 | if (not ispresent(g_pars.subscr.cp.peer_sdp.attributes) or |
| 1251 | not match(g_pars.subscr.cp.peer_sdp.attributes, preconds)) { |
| 1252 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 1253 | log2str(g_name & ": Unexpected precondition attrs in 200 OK (UPDATE): ", |
| 1254 | g_pars.subscr.cp.peer_sdp.attributes)); |
| 1255 | } |
| 1256 | |
Pau Espin Pedrol | ce370df | 2024-06-18 13:45:53 +0200 | [diff] [blame] | 1257 | g_pars.subscr.cp.sip_seq_nr := g_rx_sip_resp.msgHeader.cSeq.seqNumber + 1; |
| 1258 | } |
| 1259 | |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 1260 | /* Conditionally match and accept 180 Ringing */ |
| 1261 | exp := tr_SIP_Response_Ringing(g_pars.subscr.cp.sip_call_id, |
| 1262 | from_addr_exp, |
| 1263 | to_addr_exp, |
| 1264 | f_tr_Via_response(via), |
| 1265 | g_pars.subscr.cp.sip_seq_nr, "INVITE"); |
| 1266 | d_ringing := activate(as_SIP_ignore_resp(exp)); |
| 1267 | |
Pau Espin Pedrol | 1848ebf | 2024-06-21 17:43:39 +0200 | [diff] [blame] | 1268 | /* Wait for 200 OK (INVITE) answer */ |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 1269 | exp := tr_SIP_Response( |
| 1270 | g_pars.subscr.cp.sip_call_id, |
| 1271 | from_addr_exp, |
| 1272 | to_addr_exp, |
| 1273 | f_tr_Via_response(via), |
| 1274 | *, |
| 1275 | "INVITE", 200, |
| 1276 | g_pars.subscr.cp.sip_seq_nr, "OK", |
Pau Espin Pedrol | dc3c970 | 2024-06-20 14:29:26 +0200 | [diff] [blame] | 1277 | body := *); |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 1278 | as_SIP_expect_resp(exp, fail_others := false); |
| 1279 | |
| 1280 | deactivate(d_trying); |
| 1281 | deactivate(d_ringing); |
| 1282 | |
Pau Espin Pedrol | 1848ebf | 2024-06-21 17:43:39 +0200 | [diff] [blame] | 1283 | /* Make sure "audio" tag set in Contact header */ |
| 1284 | f_ims_validate_INVITE_Contact(g_rx_sip_resp.msgHeader.contact); |
| 1285 | |
Pau Espin Pedrol | 5acf7c6 | 2024-06-06 19:23:08 +0200 | [diff] [blame] | 1286 | /* Update To with the tags received from peer: */ |
| 1287 | g_pars.subscr.cp.to_addr := g_rx_sip_resp.msgHeader.toField; |
| 1288 | |
| 1289 | /* Transmit ACK */ |
| 1290 | g_pars.subscr.cp.sip_seq_nr := g_pars.subscr.cp.sip_seq_nr + 1; |
| 1291 | req := ts_SIP_ACK(g_pars.subscr.cp.sip_call_id, |
| 1292 | g_pars.subscr.cp.from_addr, |
| 1293 | g_pars.subscr.cp.to_addr, |
| 1294 | via, |
| 1295 | g_pars.subscr.cp.sip_seq_nr, |
| 1296 | omit); |
| 1297 | SIP.send(req); |
| 1298 | g_pars.subscr.cp.sip_seq_nr := g_pars.subscr.cp.sip_seq_nr + 1; |
| 1299 | } |
| 1300 | |
| 1301 | /* Tx BYE: */ |
| 1302 | function f_IMS_do_call_hangup() runs on IMS_ConnHdlr |
| 1303 | { |
| 1304 | var template (value) PDU_SIP_Request req; |
| 1305 | var template (present) PDU_SIP_Response exp_resp; |
| 1306 | var Via via; |
| 1307 | var charstring branch_value; |
| 1308 | |
| 1309 | branch_value := f_sip_gen_branch(f_sip_Addr_Union_to_str(g_pars.subscr.cp.from_addr.addressField), |
| 1310 | f_sip_Addr_Union_to_str(valueof(g_pars.subscr.cp.to_addr.addressField)), |
| 1311 | g_pars.subscr.cp.sip_call_id, |
| 1312 | g_pars.subscr.cp.sip_seq_nr); |
| 1313 | |
| 1314 | via := g_pars.local_via; |
| 1315 | via.viaBody[0].viaParams := f_sip_param_set(via.viaBody[0].viaParams, "branch", branch_value); |
| 1316 | |
| 1317 | /* Transmit ACK */ |
| 1318 | req := ts_SIP_BYE(g_pars.subscr.cp.sip_call_id, |
| 1319 | g_pars.subscr.cp.from_addr, |
| 1320 | g_pars.subscr.cp.to_addr, |
| 1321 | via, |
| 1322 | g_pars.subscr.cp.sip_seq_nr, |
| 1323 | omit); |
| 1324 | SIP.send(req); |
| 1325 | |
| 1326 | /* Wait for OK answer */ |
| 1327 | exp_resp := tr_SIP_Response( |
| 1328 | g_pars.subscr.cp.sip_call_id, |
| 1329 | g_pars.subscr.cp.from_addr, |
| 1330 | tr_To(tr_Addr_Union_from_val(g_pars.subscr.cp.to_addr.addressField), *), |
| 1331 | f_tr_Via_response(via), |
| 1332 | *, |
| 1333 | "BYE", 200, |
| 1334 | g_pars.subscr.cp.sip_seq_nr, "OK"); |
| 1335 | as_SIP_expect_resp(exp_resp); |
| 1336 | |
| 1337 | g_pars.subscr.cp.sip_seq_nr := g_pars.subscr.cp.sip_seq_nr + 1; |
| 1338 | } |
| 1339 | |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 1340 | private function f_ConnHdlr_parse_initial_SIP_INVITE(PDU_SIP_Request rx_sip_req) runs on IMS_ConnHdlr |
| 1341 | { |
| 1342 | f_SDP_decodeMessage(rx_sip_req.messageBody, g_pars.subscr.cp.peer_sdp); |
| 1343 | log("Rx Initial MO INVITE decoded SDP: ", g_pars.subscr.cp.peer_sdp); |
| 1344 | |
| 1345 | /* Obtain params: */ |
| 1346 | g_pars.subscr.cp.sip_call_id := rx_sip_req.msgHeader.callId.callid; |
| 1347 | g_pars.subscr.cp.from_addr := rx_sip_req.msgHeader.fromField; |
| 1348 | g_pars.subscr.cp.to_addr := rx_sip_req.msgHeader.toField; |
| 1349 | g_pars.subscr.cp.to_addr.toParams := f_sip_param_set(g_pars.subscr.cp.to_addr.toParams, "tag", f_sip_rand_tag()); |
| 1350 | g_pars.subscr.cp.sip_seq_nr := rx_sip_req.msgHeader.cSeq.seqNumber; |
| 1351 | } |
| 1352 | |
| 1353 | /* Peer is calling us, accept it: */ |
| 1354 | altstep as_IMS_mo_call_accept(boolean exp_update_to_direct_rtp := false, |
| 1355 | boolean fail_others := true) runs on IMS_ConnHdlr |
| 1356 | { |
| 1357 | var template (present) PDU_SIP_Request exp_req := |
| 1358 | tr_SIP_INVITE(f_tr_SipUrl_opt_defport(ts_SipUrl_from_Addr_Union(g_pars.subscr.cp.called.addr)), |
| 1359 | ?, |
Pau Espin Pedrol | 0908701 | 2024-06-04 18:07:48 +0200 | [diff] [blame] | 1360 | tr_From(tr_Addr_Union_from_val(g_pars.subscr.cp.calling.addr), *), |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 1361 | tr_To(tr_Addr_Union_from_val(g_pars.subscr.cp.called.addr), *), |
Pau Espin Pedrol | 480b53c | 2024-06-07 19:49:02 +0200 | [diff] [blame] | 1362 | tr_Via_from(f_tr_HostPort(g_pars.subscr.remote_sip_host, g_pars.subscr.ipsec_remote_port_s)), |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 1363 | ?, ?); |
| 1364 | var charstring sip_expect_str := log2str(exp_req); |
| 1365 | |
| 1366 | [] SIP.receive(exp_req) -> value g_rx_sip_req { |
| 1367 | var template (value) PDU_SIP_Response tx_resp; |
| 1368 | var Via via; |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 1369 | var template (omit) charstring tx_sdp; |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 1370 | var boolean peer_support_precondition := match(g_rx_sip_req.msgHeader.supported.optionsTags, |
| 1371 | superset("100rel", "precondition")); |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 1372 | |
| 1373 | /* Obtain params: */ |
| 1374 | f_ConnHdlr_parse_initial_SIP_INVITE(g_rx_sip_req); |
| 1375 | via := g_rx_sip_req.msgHeader.via; |
| 1376 | |
Pau Espin Pedrol | f1963b3 | 2024-06-07 17:07:16 +0200 | [diff] [blame] | 1377 | f_ims_validate_register_P_Access_Network_info(g_rx_sip_req, exp_present := true); |
Pau Espin Pedrol | 6088b89 | 2024-06-21 20:40:41 +0200 | [diff] [blame^] | 1378 | f_ims_validate_invite_P_Preferred_Service(g_rx_sip_req, exp_present := true); |
Pau Espin Pedrol | 1848ebf | 2024-06-21 17:43:39 +0200 | [diff] [blame] | 1379 | f_ims_validate_INVITE_Contact(g_rx_sip_req.msgHeader.contact); |
Pau Espin Pedrol | 1177ca6 | 2024-06-21 18:53:01 +0200 | [diff] [blame] | 1380 | f_ims_validate_INVITE_SDP(g_pars.subscr.cp.peer_sdp); |
Pau Espin Pedrol | 1848ebf | 2024-06-21 17:43:39 +0200 | [diff] [blame] | 1381 | |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 1382 | if (g_pars.subscr.cp.require_precondition_ext and not peer_support_precondition) { |
| 1383 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 1384 | log2str(g_name & ": Missing '100rel,precondition' in INVITE Supported header: ", |
| 1385 | g_rx_sip_req.msgHeader.supported)); |
| 1386 | } |
Pau Espin Pedrol | f1963b3 | 2024-06-07 17:07:16 +0200 | [diff] [blame] | 1387 | |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 1388 | /* Tx 100 Tyring */ |
| 1389 | tx_resp := ts_SIP_Response_Trying(g_pars.subscr.cp.sip_call_id, |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 1390 | g_pars.subscr.cp.from_addr, |
| 1391 | g_pars.subscr.cp.to_addr, |
| 1392 | via, |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 1393 | g_pars.subscr.cp.sip_seq_nr, |
| 1394 | "INVITE", |
| 1395 | allow := omit, |
| 1396 | server := g_pars.server_name, |
| 1397 | userAgent := omit); |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 1398 | SIP.send(tx_resp); |
| 1399 | |
Pau Espin Pedrol | 4d57206 | 2024-06-18 20:20:55 +0200 | [diff] [blame] | 1400 | if (g_pars.subscr.cp.mo.tx_coord_cmd_invite_trying) { |
| 1401 | /* Signal used to inform that Dedicated bearer can be established: */ |
| 1402 | COORD.send(IMS_COORD_CMD_CALL_TRYING); |
| 1403 | } |
| 1404 | |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 1405 | /* Use precondition ? */ |
| 1406 | if (g_pars.subscr.cp.require_precondition_ext or |
| 1407 | (g_pars.subscr.cp.support_precondition_ext and peer_support_precondition)) { |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 1408 | var template (present) SDP_attribute_list preconds; |
| 1409 | /* Validate SDP in INVITE contains the preconditions: |
| 1410 | * a=curr:qos local none |
| 1411 | * a=curr:qos remote none |
| 1412 | * a=des:qos mandatory local sendrecv |
| 1413 | * a=des:qos optional remote sendrecv |
| 1414 | */ |
| 1415 | preconds := superset( |
| 1416 | tr_SDP_curr(c_SDP_PRECON_STATUS_TYPE_local, c_SDP_PRECON_DIR_TAG_none), |
| 1417 | tr_SDP_curr(c_SDP_PRECON_STATUS_TYPE_remote, c_SDP_PRECON_DIR_TAG_none), |
| 1418 | tr_SDP_des(c_SDP_PRECON_STRENGTH_TAG_mandatory, c_SDP_PRECON_STATUS_TYPE_local, c_SDP_PRECON_DIR_TAG_sendrecv), |
| 1419 | tr_SDP_des(c_SDP_PRECON_STRENGTH_TAG_optional, c_SDP_PRECON_STATUS_TYPE_remote, c_SDP_PRECON_DIR_TAG_sendrecv)); |
| 1420 | if (not ispresent(g_pars.subscr.cp.peer_sdp.attributes) or |
| 1421 | not match(g_pars.subscr.cp.peer_sdp.attributes, preconds)) { |
| 1422 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 1423 | log2str(g_name & ": Unexpected precondition attrs in INVITE : ", |
| 1424 | g_pars.subscr.cp.peer_sdp.attributes)); |
| 1425 | } |
| 1426 | |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 1427 | /* Tx 183 Session Progress */ |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 1428 | tx_sdp := f_gen_sdp(IMS_GEN_SDP_MT_Session_Progress); |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 1429 | tx_resp := ts_SIP_Response_SessionProgress(g_pars.subscr.cp.sip_call_id, |
| 1430 | g_pars.subscr.cp.from_addr, |
| 1431 | g_pars.subscr.cp.to_addr, |
| 1432 | via, |
| 1433 | g_pars.subscr.cp.sip_seq_nr, |
| 1434 | rseq := ts_RSeq(1), |
| 1435 | body := tx_sdp); |
| 1436 | SIP.send(tx_resp); |
| 1437 | |
| 1438 | /* Rx PRACK */ |
| 1439 | exp_req := tr_SIP_PRACK(f_tr_SipUrl_opt_defport(ts_SipUrl_from_Addr_Union(g_pars.subscr.cp.called.addr)), |
| 1440 | g_pars.subscr.cp.sip_call_id, |
| 1441 | g_pars.subscr.cp.from_addr, |
| 1442 | g_pars.subscr.cp.to_addr, |
| 1443 | f_tr_Via_response(via), |
| 1444 | g_pars.subscr.cp.sip_seq_nr + 1, |
| 1445 | rack := tr_RAck(1, g_pars.subscr.cp.sip_seq_nr, "INVITE"), |
| 1446 | body := omit); |
| 1447 | as_SIP_expect_req(exp_req); |
| 1448 | |
| 1449 | /* Tx 200 OK (PRACK) */ |
| 1450 | tx_resp := ts_SIP_Response(g_pars.subscr.cp.sip_call_id, |
| 1451 | g_pars.subscr.cp.from_addr, |
| 1452 | g_pars.subscr.cp.to_addr, |
| 1453 | "PRACK", 200, |
| 1454 | g_pars.subscr.cp.sip_seq_nr, |
| 1455 | "OK", |
| 1456 | via, |
| 1457 | body := omit); |
| 1458 | SIP.send(tx_resp); |
| 1459 | |
| 1460 | /* Rx UPDATE */ |
| 1461 | exp_req := tr_SIP_UPDATE(f_tr_SipUrl_opt_defport(ts_SipUrl_from_Addr_Union(g_pars.subscr.cp.called.addr)), |
| 1462 | g_pars.subscr.cp.sip_call_id, |
| 1463 | g_pars.subscr.cp.from_addr, |
| 1464 | g_pars.subscr.cp.to_addr, |
| 1465 | f_tr_Via_response(via), |
| 1466 | g_pars.subscr.cp.sip_seq_nr + 1, |
| 1467 | require := tr_Require(superset("precondition")), |
| 1468 | body := ?); |
| 1469 | as_SIP_expect_req(exp_req); |
| 1470 | |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 1471 | /* Validate SDP in UPDATE contains the preconditions: |
| 1472 | * a=curr:qos local sendrecv |
| 1473 | * a=curr:qos remote none |
| 1474 | * a=des:qos mandatory local sendrecv |
| 1475 | * a=des:qos mandatory remote sendrecv |
| 1476 | */ |
| 1477 | preconds := superset( |
| 1478 | tr_SDP_curr(c_SDP_PRECON_STATUS_TYPE_local, c_SDP_PRECON_DIR_TAG_sendrecv), |
| 1479 | tr_SDP_curr(c_SDP_PRECON_STATUS_TYPE_remote, c_SDP_PRECON_DIR_TAG_none), |
| 1480 | tr_SDP_des(c_SDP_PRECON_STRENGTH_TAG_mandatory, c_SDP_PRECON_STATUS_TYPE_local, c_SDP_PRECON_DIR_TAG_sendrecv), |
| 1481 | tr_SDP_des(c_SDP_PRECON_STRENGTH_TAG_mandatory, c_SDP_PRECON_STATUS_TYPE_remote, c_SDP_PRECON_DIR_TAG_sendrecv)); |
| 1482 | if (not ispresent(g_pars.subscr.cp.peer_sdp.attributes) or |
| 1483 | not match(g_pars.subscr.cp.peer_sdp.attributes, preconds)) { |
| 1484 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 1485 | log2str(g_name & ": Unexpected precondition attrs in UPDATE: ", |
| 1486 | g_pars.subscr.cp.peer_sdp.attributes)); |
| 1487 | } |
| 1488 | |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 1489 | /* Tx 200 OK (UPDATE) */ |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 1490 | tx_sdp := f_gen_sdp(IMS_GEN_SDP_MT_UPDATE_200OK); |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 1491 | tx_resp := ts_SIP_Response(g_pars.subscr.cp.sip_call_id, |
| 1492 | g_pars.subscr.cp.from_addr, |
| 1493 | g_pars.subscr.cp.to_addr, |
| 1494 | "UPDATE", 200, |
| 1495 | g_pars.subscr.cp.sip_seq_nr, |
| 1496 | "OK", |
| 1497 | via, |
| 1498 | body := tx_sdp); |
| 1499 | SIP.send(tx_resp); |
| 1500 | |
| 1501 | g_pars.subscr.cp.sip_seq_nr := g_pars.subscr.cp.sip_seq_nr + 1; |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 1502 | /* 200 OK (INVITE) has no SDP if we use precondition: */ |
| 1503 | tx_sdp := omit; |
| 1504 | } else { |
| 1505 | /* Check no precondition is sent in SDP */ |
| 1506 | if (ispresent(g_pars.subscr.cp.peer_sdp.attributes) and |
| 1507 | match (g_pars.subscr.cp.peer_sdp.attributes, superset(tr_SDP_curr_present, |
| 1508 | tr_SDP_des_present, |
| 1509 | tr_SDP_conf_present))) { |
| 1510 | Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, |
| 1511 | log2str(g_name & ": Unexpected precondition attrs in INVITE: ", |
| 1512 | g_pars.subscr.cp.peer_sdp.attributes)); |
| 1513 | } |
| 1514 | /* 200 OK (INVITE) has SDP if no precondition is used: */ |
| 1515 | tx_sdp := f_gen_sdp(); |
Pau Espin Pedrol | faf21be | 2024-06-12 16:42:00 +0200 | [diff] [blame] | 1516 | } |
| 1517 | |
| 1518 | /* Tx 180 Ringing */ |
| 1519 | tx_resp := ts_SIP_Response_Ringing(g_pars.subscr.cp.sip_call_id, |
| 1520 | g_pars.subscr.cp.from_addr, |
| 1521 | g_pars.subscr.cp.to_addr, |
| 1522 | via, |
| 1523 | g_pars.subscr.cp.sip_seq_nr); |
| 1524 | SIP.send(tx_resp); |
| 1525 | |
| 1526 | |
| 1527 | /* Tx 200 OK */ |
Pau Espin Pedrol | 16419a2 | 2024-06-20 13:51:48 +0200 | [diff] [blame] | 1528 | tx_sdp := f_gen_sdp(); |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 1529 | tx_resp := ts_SIP_Response(g_pars.subscr.cp.sip_call_id, |
| 1530 | g_pars.subscr.cp.from_addr, |
| 1531 | g_pars.subscr.cp.to_addr, |
| 1532 | "INVITE", 200, |
| 1533 | g_pars.subscr.cp.sip_seq_nr, |
| 1534 | "OK", |
| 1535 | via, |
| 1536 | body := tx_sdp); |
| 1537 | SIP.send(tx_resp); |
| 1538 | |
| 1539 | /* Wait for ACK */ |
| 1540 | exp_req := tr_SIP_ACK(f_tr_SipUrl_opt_defport(ts_SipUrl_from_Addr_Union(g_pars.subscr.cp.called.addr)), |
| 1541 | g_pars.subscr.cp.sip_call_id, |
| 1542 | g_pars.subscr.cp.from_addr, |
| 1543 | g_pars.subscr.cp.to_addr, |
| 1544 | f_tr_Via_response(via), |
| 1545 | g_pars.subscr.cp.sip_seq_nr, *); |
| 1546 | as_SIP_expect_req(exp_req); |
| 1547 | } |
| 1548 | [fail_others] as_SIP_fail_resp(sip_expect_str); |
| 1549 | [fail_others] as_SIP_fail_req(sip_expect_str); |
| 1550 | |
| 1551 | } |
| 1552 | |
| 1553 | /* Call is terminated by peer: */ |
| 1554 | altstep as_IMS_exp_call_hangup(template (present) integer exp_seq_nr := ?, boolean fail_others := true) runs on IMS_ConnHdlr |
| 1555 | { |
| 1556 | var template (present) PDU_SIP_Request exp_req := |
| 1557 | tr_SIP_BYE(f_tr_SipUrl_opt_defport(ts_SipUrl_from_Addr_Union(g_pars.subscr.cp.called.addr)), |
| 1558 | g_pars.subscr.cp.sip_call_id, |
| 1559 | g_pars.subscr.cp.from_addr, |
| 1560 | g_pars.subscr.cp.to_addr, |
Pau Espin Pedrol | 480b53c | 2024-06-07 19:49:02 +0200 | [diff] [blame] | 1561 | tr_Via_from(f_tr_HostPort(g_pars.subscr.remote_sip_host, g_pars.subscr.ipsec_remote_port_s)), |
Pau Espin Pedrol | 901cede | 2024-05-30 13:03:42 +0200 | [diff] [blame] | 1562 | exp_seq_nr); |
| 1563 | var charstring sip_expect_str := log2str(exp_req); |
| 1564 | |
| 1565 | [] SIP.receive(exp_req) -> value g_rx_sip_req { |
| 1566 | var template (value) PDU_SIP_Response tx_resp; |
| 1567 | var charstring tx_sdp; |
| 1568 | var Via via; |
| 1569 | |
| 1570 | /* Update parameters: */ |
| 1571 | g_pars.subscr.cp.sip_seq_nr := g_rx_sip_req.msgHeader.cSeq.seqNumber; |
| 1572 | /* "branch" has changed: */ |
| 1573 | via := g_rx_sip_req.msgHeader.via; |
| 1574 | |
| 1575 | /* Tx 200 OK */ |
| 1576 | tx_sdp := f_gen_sdp(); |
| 1577 | tx_resp := ts_SIP_Response(g_pars.subscr.cp.sip_call_id, |
| 1578 | g_pars.subscr.cp.from_addr, |
| 1579 | g_pars.subscr.cp.to_addr, |
| 1580 | "BYE", 200, |
| 1581 | g_pars.subscr.cp.sip_seq_nr, |
| 1582 | "OK", |
| 1583 | via, |
| 1584 | body := tx_sdp); |
| 1585 | SIP.send(tx_resp); |
| 1586 | } |
| 1587 | [fail_others] as_SIP_fail_resp(sip_expect_str); |
| 1588 | [fail_others] as_SIP_fail_req(sip_expect_str); |
| 1589 | } |
| 1590 | |
Pau Espin Pedrol | ac8a054 | 2024-04-19 17:30:57 +0200 | [diff] [blame] | 1591 | } |