314 lines
17 KiB
C++
314 lines
17 KiB
C++
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// SPDX-License-Identifier: GPL-3.0-only
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// SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
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// lint-disable-file fixed-width-types
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// Imsd:Messages unit tests — every builder compared byte-for-byte against a
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// reference message cross-generated from the Python VoLTE stack with pinned
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// tags/branches/SPIs. A divergence here is a wire-format change, i.e. a
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// registration or call that the commercial IMS core may reject; these are the
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// hardest pins in the project. Two deliberate post-parity divergences:
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// the REGISTER Contact carries +sip.instance and the MMTEL ICSI feature tag
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// (the Python stack registered without them, which made the network divert
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// incoming calls to voicemail — see ContactFeatures in Imsd:Messages), and
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// every ICSI feature-tag value is percent-encoded (urn%3Aurn-7%3A...) — the
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// TS 24.229 coding and what the stock modem sends on the wire; the Python
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// stack's plain-colon form is a different string under RFC 3841 matching
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// and left terminating access-domain selection routing incoming calls to
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// CS fallback (observed live 2026-07-20).
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import std;
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import Imsd;
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using namespace imsd::msg;
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namespace {
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int Failures = 0;
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void Check(bool cond, std::string_view msg) {
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if (!cond) {
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std::println(std::cerr, "FAIL: {}", msg);
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++Failures;
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}
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}
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void Eq(std::string_view got, std::string_view want, std::string_view msg) {
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if (got != want) {
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std::println(std::cerr, "FAIL: {}\n--- got ---\n{}\n--- want ---\n{}", msg, got, want);
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++Failures;
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}
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}
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Context MakeCtx() {
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Context c;
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c.id = imsd::aka::MakeIdentity("001010123456789", "001", "01");
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c.local = "2001:db8::db43";
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c.route = "<sip:[2001:db8::105]:6000;lr>";
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c.ppi = "tel:+31611111111";
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c.securityServer =
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"ipsec-3gpp; q=0.1; alg=hmac-sha-1-96; ealg=aes-cbc; "
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"spi-c=86438593; spi-s=86438592; port-c=33421; port-s=6000";
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c.instanceId = "urn:gsma:imei:35999999-000000-1";
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c.panInfo = "3GPP-E-UTRAN-FDD;utran-cell-id-3gpp=0010112340ABCDE0";
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return c;
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}
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constexpr std::string_view Reg1 =
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"REGISTER sip:ims.mnc001.mcc001.3gppnetwork.org SIP/2.0\r\n"
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"Via: SIP/2.0/UDP [2001:db8::db43]:5060;branch=z9hG4bKREGBRANCH123456;rport\r\n"
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"Max-Forwards: 70\r\n"
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"From: <sip:001010123456789@ims.mnc001.mcc001.3gppnetwork.org>;tag=FTAG5678\r\n"
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"To: <sip:001010123456789@ims.mnc001.mcc001.3gppnetwork.org>\r\n"
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"Call-ID: REGCALLID@2001:db8::db43\r\n"
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"CSeq: 1 REGISTER\r\n"
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"Contact: <sip:001010123456789@[2001:db8::db43]:5060>;+sip.instance=\"<urn:gsma:imei:35999999-000000-1>\";+g.3gpp.icsi-ref=\"urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel\";expires=600000\r\n"
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"Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, NOTIFY, PRACK, UPDATE, MESSAGE, REFER\r\n"
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"Authorization: Digest username=\"001010123456789@ims.mnc001.mcc001.3gppnetwork.org\", realm=\"ims.mnc001.mcc001.3gppnetwork.org\", uri=\"sip:ims.mnc001.mcc001.3gppnetwork.org\", nonce=\"\", response=\"\"\r\n"
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"Require: sec-agree\r\n"
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"Proxy-Require: sec-agree\r\n"
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"Security-Client: ipsec-3gpp; alg=hmac-sha-1-96; ealg=aes-cbc; spi-c=7449812; spi-s=176466735; port-c=45061; port-s=45062\r\n"
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"Supported: sec-agree, path\r\n"
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"Expires: 600000\r\n"
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"P-Access-Network-Info: 3GPP-E-UTRAN-FDD;utran-cell-id-3gpp=0010112340ABCDE0\r\n"
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"Content-Length: 0\r\n"
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"\r\n";
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constexpr std::string_view Reg2 =
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"REGISTER sip:ims.mnc001.mcc001.3gppnetwork.org SIP/2.0\r\n"
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"Via: SIP/2.0/TCP [2001:db8::db43]:45062;branch=z9hG4bKREGBRANCH123456;rport\r\n"
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"Max-Forwards: 70\r\n"
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"From: <sip:001010123456789@ims.mnc001.mcc001.3gppnetwork.org>;tag=FTAG5678\r\n"
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"To: <sip:001010123456789@ims.mnc001.mcc001.3gppnetwork.org>\r\n"
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"Call-ID: REGCALLID@2001:db8::db43\r\n"
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"CSeq: 2 REGISTER\r\n"
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"Contact: <sip:001010123456789@[2001:db8::db43]:45062>;+sip.instance=\"<urn:gsma:imei:35999999-000000-1>\";+g.3gpp.icsi-ref=\"urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel\";expires=600000\r\n"
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"Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, NOTIFY, PRACK, UPDATE, MESSAGE, REFER\r\n"
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"Authorization: Digest username=\"001010123456789@ims.mnc001.mcc001.3gppnetwork.org\", realm=\"ims.mnc001.mcc001.3gppnetwork.org\", uri=\"sip:ims.mnc001.mcc001.3gppnetwork.org\", nonce=\"NONCEXYZ\", qop=auth, nc=00000001, cnonce=\"CNONCE0123456789\", response=\"RESP0000\", algorithm=AKAv1-MD5\r\n"
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"Require: sec-agree\r\n"
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"Proxy-Require: sec-agree\r\n"
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"Security-Client: ipsec-3gpp; alg=hmac-sha-1-96; ealg=aes-cbc; spi-c=7449812; spi-s=176466735; port-c=45061; port-s=45062\r\n"
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"Security-Verify: ipsec-3gpp; q=0.1; alg=hmac-sha-1-96; ealg=aes-cbc; spi-c=86438593; spi-s=86438592; port-c=33421; port-s=6000\r\n"
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"Supported: sec-agree, path\r\n"
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"Expires: 600000\r\n"
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"P-Access-Network-Info: 3GPP-E-UTRAN-FDD;utran-cell-id-3gpp=0010112340ABCDE0\r\n"
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"Content-Length: 0\r\n"
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"\r\n";
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constexpr std::string_view Sdp =
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"v=0\r\n"
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"o=- 7777777 7777777 IN IP6 2001:db8::db43\r\n"
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"s=-\r\n"
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"c=IN IP6 2001:db8::db43\r\n"
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"t=0 0\r\n"
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"m=audio 50004 RTP/AVP 97 98\r\n"
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"b=AS:41\r\n"
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"b=RS:512\r\n"
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"b=RR:1536\r\n"
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"a=rtpmap:97 AMR-WB/16000/1\r\n"
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"a=fmtp:97 octet-align=1;mode-change-capability=2;max-red=0\r\n"
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"a=rtpmap:98 telephone-event/16000\r\n"
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"a=fmtp:98 0-15\r\n"
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"a=ptime:20\r\n"
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"a=maxptime:240\r\n"
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"a=sendrecv\r\n";
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constexpr std::string_view Invite =
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"INVITE sip:1233;phone-context=ims.mnc001.mcc001.3gppnetwork.org@ims.mnc001.mcc001.3gppnetwork.org;user=phone SIP/2.0\r\n"
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"Via: SIP/2.0/TCP [2001:db8::db43]:45062;branch=z9hG4bKINVBRANCH0000000000;rport\r\n"
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"Max-Forwards: 70\r\n"
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"Route: <sip:[2001:db8::105]:6000;lr>\r\n"
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"From: <sip:001010123456789@ims.mnc001.mcc001.3gppnetwork.org>;tag=ITAG123456\r\n"
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"To: <sip:1233;phone-context=ims.mnc001.mcc001.3gppnetwork.org@ims.mnc001.mcc001.3gppnetwork.org;user=phone>\r\n"
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"Call-ID: CALLID789@2001:db8::db43\r\n"
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"CSeq: 1 INVITE\r\n"
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"Contact: <sip:001010123456789@[2001:db8::db43]:45062>;+g.3gpp.icsi-ref=\"urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel\"\r\n"
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"Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, UPDATE, MESSAGE, REFER\r\n"
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"Supported: 100rel, timer\r\n"
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"Accept-Contact: *;+g.3gpp.icsi-ref=\"urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel\"\r\n"
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"P-Preferred-Identity: <tel:+31611111111>\r\n"
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"P-Access-Network-Info: 3GPP-E-UTRAN-FDD;utran-cell-id-3gpp=0010112340ABCDE0\r\n"
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"Security-Verify: ipsec-3gpp; q=0.1; alg=hmac-sha-1-96; ealg=aes-cbc; spi-c=86438593; spi-s=86438592; port-c=33421; port-s=6000\r\n"
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"Proxy-Require: sec-agree\r\n"
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"Require: sec-agree\r\n"
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"Session-Expires: 1800;refresher=uac\r\n"
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"Min-SE: 90\r\n"
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"Content-Type: application/sdp\r\n"
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"Content-Length: 323\r\n"
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"\r\n"
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"v=0\r\n"
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"o=- 7777777 7777777 IN IP6 2001:db8::db43\r\n"
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"s=-\r\n"
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"c=IN IP6 2001:db8::db43\r\n"
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"t=0 0\r\n"
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"m=audio 50004 RTP/AVP 97 98\r\n"
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"b=AS:41\r\n"
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"b=RS:512\r\n"
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"b=RR:1536\r\n"
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"a=rtpmap:97 AMR-WB/16000/1\r\n"
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"a=fmtp:97 octet-align=1;mode-change-capability=2;max-red=0\r\n"
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"a=rtpmap:98 telephone-event/16000\r\n"
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"a=fmtp:98 0-15\r\n"
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"a=ptime:20\r\n"
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"a=maxptime:240\r\n"
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"a=sendrecv\r\n";
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constexpr std::string_view Subscribe =
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"SUBSCRIBE sip:001010123456789@ims.mnc001.mcc001.3gppnetwork.org SIP/2.0\r\n"
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"Via: SIP/2.0/TCP [2001:db8::db43]:45062;branch=z9hG4bKSUBBRANCH0000000000;rport\r\n"
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"Max-Forwards: 70\r\n"
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"Route: <sip:[2001:db8::105]:6000;lr>\r\n"
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"From: <sip:001010123456789@ims.mnc001.mcc001.3gppnetwork.org>;tag=STAG1234\r\n"
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"To: <sip:001010123456789@ims.mnc001.mcc001.3gppnetwork.org>\r\n"
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"Call-ID: SUBCALLID@2001:db8::db43\r\n"
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"CSeq: 1 SUBSCRIBE\r\n"
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"Contact: <sip:001010123456789@[2001:db8::db43]:45062>\r\n"
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"Event: reg\r\n"
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"Accept: application/reginfo+xml\r\n"
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"Expires: 600000\r\n"
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"P-Preferred-Identity: <tel:+31611111111>\r\n"
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"P-Access-Network-Info: 3GPP-E-UTRAN-FDD;utran-cell-id-3gpp=0010112340ABCDE0\r\n"
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"Security-Verify: ipsec-3gpp; q=0.1; alg=hmac-sha-1-96; ealg=aes-cbc; spi-c=86438593; spi-s=86438592; port-c=33421; port-s=6000\r\n"
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"Proxy-Require: sec-agree\r\n"
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"Require: sec-agree\r\n"
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"Content-Length: 0\r\n"
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"\r\n";
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}
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int main() {
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Context c = MakeCtx();
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// ---- REGISTER (initial + protected), byte-exact vs Python
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Eq(BuildRegisterInitial(c, "REGCALLID@2001:db8::db43", "FTAG5678",
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"REGBRANCH123456", 7449812u, 176466735u),
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Reg1, "unprotected REGISTER");
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{
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std::string auth = AuthAka(c, "NONCEXYZ", "CNONCE0123456789", "RESP0000");
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Eq(BuildRegisterProtected(c, "REGCALLID@2001:db8::db43", "FTAG5678",
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"REGBRANCH123456", 2, 7449812u, 176466735u, auth),
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Reg2, "protected REGISTER");
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}
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// ---- RuriFor variants
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Eq(RuriFor("1233", c.id.domain), "sip:1233;phone-context=ims.mnc001.mcc001.3gppnetwork.org@ims.mnc001.mcc001.3gppnetwork.org;user=phone", "ruri short code");
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Eq(RuriFor("+31612345678", c.id.domain), "sip:+31612345678@ims.mnc001.mcc001.3gppnetwork.org;user=phone", "ruri E.164");
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Eq(RuriFor("0612345678", c.id.domain), "sip:+31612345678@ims.mnc001.mcc001.3gppnetwork.org;user=phone", "ruri Dutch national");
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Eq(RuriFor("0031612345678", c.id.domain), "sip:+31612345678@ims.mnc001.mcc001.3gppnetwork.org;user=phone", "ruri 00 intl");
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// ---- SUBSCRIBE (reg event, RFC 3680) — no Python counterpart; pinned
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// against the shape of the other protected in-flow requests
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Eq(BuildSubscribeReg(c, "SUBCALLID@2001:db8::db43", "STAG1234", "SUBBRANCH0000000000"), Subscribe, "reg-event SUBSCRIBE (no aor: temporary IMPU fallback)");
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{
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Context c2 = MakeCtx();
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c2.aor = "sip:+31611111111@ims.mnc001.mcc001.3gppnetwork.org";
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std::string sub = BuildSubscribeReg(c2, "SUBCALLID@2001:db8::db43", "STAG1234", "SUBBRANCH0000000000");
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Check(sub.starts_with("SUBSCRIBE sip:+31611111111@ims.mnc001.mcc001.3gppnetwork.org SIP/2.0\r\n"), "reg-event SUBSCRIBE aor R-URI");
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Check(sub.contains("\r\nFrom: <sip:+31611111111@ims.mnc001.mcc001.3gppnetwork.org>;tag=STAG1234\r\n"), "reg-event SUBSCRIBE aor From");
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Check(sub.contains("\r\nTo: <sip:+31611111111@ims.mnc001.mcc001.3gppnetwork.org>\r\n"), "reg-event SUBSCRIBE aor To");
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}
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{
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// no identity learned yet: P-Preferred-Identity is omitted, not "<>"
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Context c3 = MakeCtx();
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c3.ppi.clear();
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Check(!BuildSubscribeReg(c3, "SUBCALLID@2001:db8::db43", "STAG1234", "SUBBRANCH0000000000") .contains("P-Preferred-Identity"), "empty ppi omits P-Preferred-Identity in SUBSCRIBE");
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Dialog d;
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d.ruri = RuriFor("1233", c3.id.domain);
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d.callid = "CID@x"; d.itag = "it"; d.invBranch = "ib";
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Check(!BuildInvite(c3, d, "v=0\r\n", false).contains("P-Preferred-Identity"), "empty ppi omits P-Preferred-Identity in INVITE");
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}
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// ---- INVITE, byte-exact vs Python
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{
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Dialog d;
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d.ruri = RuriFor("1233", c.id.domain);
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d.callid = "CALLID789@2001:db8::db43";
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d.itag = "ITAG123456";
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d.invBranch = "INVBRANCH0000000000";
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Eq(BuildInvite(c, d, Sdp, /*precond=*/false), Invite, "INVITE + AMR-WB SDP offer");
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}
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// ---- in-dialog PRACK/BYE + ACK + CANCEL + 200 (structural checks)
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{
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Dialog d;
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d.ruri = RuriFor("1233", c.id.domain);
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d.callid = "CID@x";
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d.itag = "it";
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d.invBranch = "ib";
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d.dialogTo = "<sip:1233@x>;tag=remote99";
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d.remoteTarget = "sip:termgw@2001:db8::9";
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d.recordRoute = {"<sip:rr1;lr>", "<sip:rr2;lr>"};
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// dialog route = reversed record-route
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Check(DialogRoute(c, d) == "<sip:rr2;lr>, <sip:rr1;lr>", "dialog route reversed");
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std::array<std::string, 1> rack = {"RAck: 42 1 INVITE"};
|
||
|
|
std::string prack = BuildInDialog(c, d, "PRACK", 2, "prbranch", rack);
|
||
|
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Check(prack.starts_with("PRACK sip:termgw@2001:db8::9 SIP/2.0\r\n"), "PRACK request-URI = remote target");
|
||
|
|
Check(prack.contains("Route: <sip:rr2;lr>, <sip:rr1;lr>\r\n"), "PRACK dialog route");
|
||
|
|
Check(prack.contains("To: <sip:1233@x>;tag=remote99\r\n"), "PRACK To has remote tag");
|
||
|
|
Check(prack.contains("CSeq: 2 PRACK\r\n"), "PRACK CSeq");
|
||
|
|
Check(prack.contains("RAck: 42 1 INVITE\r\n"), "PRACK RAck");
|
||
|
|
Check(prack.ends_with("Content-Length: 0\r\n\r\n"), "PRACK empty body");
|
||
|
|
|
||
|
|
std::string bye = BuildInDialog(c, d, "BYE", 3, "byebranch");
|
||
|
|
Check(bye.starts_with("BYE sip:termgw@2001:db8::9 SIP/2.0\r\n"), "BYE line");
|
||
|
|
Check(bye.contains("CSeq: 3 BYE\r\n"), "BYE CSeq");
|
||
|
|
|
||
|
|
std::string ack = BuildAck2xx(c, d, "ackbranch", "<ignored>");
|
||
|
|
Check(ack.starts_with("ACK sip:termgw@2001:db8::9 SIP/2.0\r\n"), "ACK 2xx target");
|
||
|
|
Check(ack.contains("To: <sip:1233@x>;tag=remote99\r\n"), "ACK 2xx dialog To");
|
||
|
|
Check(ack.contains("CSeq: 1 ACK\r\n"), "ACK CSeq 1");
|
||
|
|
|
||
|
|
std::string cancel = BuildCancel(c, d);
|
||
|
|
Check(cancel.starts_with(std::format("CANCEL {} SIP/2.0\r\n", d.ruri)), "CANCEL request-URI = ruri");
|
||
|
|
Check(cancel.contains("branch=z9hG4bKib;rport\r\n"), "CANCEL reuses INVITE branch");
|
||
|
|
Check(cancel.contains("CSeq: 1 CANCEL\r\n"), "CANCEL CSeq copies INVITE");
|
||
|
|
}
|
||
|
|
{
|
||
|
|
// non-2xx ACK uses the INVITE branch + registration route + resp To
|
||
|
|
Dialog d;
|
||
|
|
d.ruri = "sip:x@y"; d.callid = "CID"; d.itag = "it"; d.invBranch = "ib9";
|
||
|
|
std::string ack = BuildAckNon2xx(c, d, "<sip:x@y>;tag=z");
|
||
|
|
Check(ack.contains("branch=z9hG4bKib9;rport\r\n"), "non-2xx ACK INVITE branch");
|
||
|
|
Check(ack.contains(std::format("Route: {}\r\n", c.route)), "non-2xx ACK registration route");
|
||
|
|
Check(ack.contains("To: <sip:x@y>;tag=z\r\n"), "non-2xx ACK echoes response To");
|
||
|
|
}
|
||
|
|
|
||
|
|
// ---- 200 OK response echoes the request's dialog headers, in order
|
||
|
|
{
|
||
|
|
std::string req =
|
||
|
|
"BYE sip:me@here SIP/2.0\r\n"
|
||
|
|
"Via: SIP/2.0/TCP [a::1]:45061;branch=z9hG4bKother\r\n"
|
||
|
|
"From: <sip:them@far>;tag=T\r\n"
|
||
|
|
"To: <sip:me@here>;tag=M\r\n"
|
||
|
|
"Call-ID: xyz@far\r\n"
|
||
|
|
"CSeq: 7 BYE\r\n"
|
||
|
|
"Content-Length: 0\r\n\r\n";
|
||
|
|
std::string r = BuildResponse200(c, req);
|
||
|
|
Check(r.starts_with("SIP/2.0 200 OK\r\n"), "200 status line");
|
||
|
|
Check(r.contains("Via: SIP/2.0/TCP [a::1]:45061;branch=z9hG4bKother\r\n"), "200 echoes Via");
|
||
|
|
Check(r.contains("Call-ID: xyz@far\r\n"), "200 echoes Call-ID");
|
||
|
|
Check(r.contains("CSeq: 7 BYE\r\n"), "200 echoes CSeq");
|
||
|
|
Check(r.ends_with("Content-Length: 0\r\n\r\n"), "200 empty body");
|
||
|
|
// with an SDP answer: our Contact + application/sdp appear
|
||
|
|
std::string r2 = BuildResponse200(c, req, Sdp);
|
||
|
|
Check(r2.contains("Content-Type: application/sdp\r\n"), "200 w/ SDP content-type");
|
||
|
|
Check(r2.contains("Contact: <sip:001010123456789@[2001:db8::db43]:45062>\r\n"), "200 w/ SDP includes our Contact");
|
||
|
|
Check(r2.ends_with(Sdp), "200 w/ SDP body");
|
||
|
|
}
|
||
|
|
|
||
|
|
// ---- s53 oracle diff: UUID Contact user-part + User-Agent ------------
|
||
|
|
{
|
||
|
|
Context c = MakeCtx();
|
||
|
|
c.contactUser = "029dd36c-857c-4270-ad7f-0ae70d31d50f";
|
||
|
|
c.userAgent = "Fairphone_Fairphone 6_FP6.QREL.16.82.0";
|
||
|
|
std::string r1 = BuildRegisterInitial(c, "cid@h", "ft", "br", 1, 2);
|
||
|
|
Check(r1.contains("Contact: <sip:029dd36c-857c-4270-ad7f-0ae70d31d50f@" "[2001:db8::db43]:5060>"), "reg1 Contact carries contactUser, not the IMSI");
|
||
|
|
Check(!r1.contains("sip:001010123456789@[2001:db8::db43]"), "reg1 has no IMSI-user Contact when contactUser set");
|
||
|
|
Check(r1.contains("From: <sip:001010123456789@ims.mnc001.mcc001"), "reg1 From/AOR stays the IMSI IMPU");
|
||
|
|
Check(r1.contains("User-Agent: Fairphone_Fairphone 6_FP6.QREL.16.82.0\r\n"), "reg1 User-Agent emitted");
|
||
|
|
std::string r2 = BuildRegisterProtected(c, "cid@h", "ft", "br", 2, 1, 2, "Authorization: x");
|
||
|
|
Check(r2.contains("Contact: <sip:029dd36c-857c-4270-ad7f-0ae70d31d50f@" "[2001:db8::db43]:45062>"), "reg2 Contact carries contactUser at the protected port");
|
||
|
|
Check(r2.contains("User-Agent: Fairphone_Fairphone 6_FP6.QREL.16.82.0\r\n"), "reg2 User-Agent emitted");
|
||
|
|
c.userAgent.clear();
|
||
|
|
Check(!BuildRegisterInitial(c, "cid@h", "ft", "br", 1, 2) .contains("User-Agent:"), "empty userAgent omits the header");
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Failures == 0) std::println("Messages: all tests passed");
|
||
|
|
return Failures;
|
||
|
|
}
|