<p>fixeria has uploaded this change for <strong>review</strong>.</p><p><a href="https://gerrit.osmocom.org/c/osmocom-bb/+/14692">View Change</a></p><pre style="font-family: monospace,monospace; white-space: pre-wrap;">trx_toolkit/ctrl_if_trx.py: implement TRXD header version negotiation<br><br>Messages on DATA interface may have different header formats, defined<br>by a version number, which can be negotiated on the control interface.<br>By default, the Transceiver will use the legacy header version (0).<br><br>The header format negotiation can be initiated by the L1 using the<br>'SETFORMAT' command. If the requested version is not supported by<br>the transceiver, status code of the response message should indicate<br>a preferred (basically, the latest) version. The format of this<br>message is the following:<br><br> L1 -> TRX: CMD SETFORMAT VER_REQ<br> L1 <- TRX: RSP SETFORMAT VER_RSP VER_REQ<br><br>where:<br><br> - VER_REQ is the requested version (suggested by the L1),<br> - VER_RSP is either the applied version if matches VER_REQ,<br> or a preferred version if VER_REQ is not supported.<br><br>If the transceiver indicates VER_RSP different than VER_REQ, the L1<br>is supposed to reinitiate the version negotiation using the suggested<br>VER_RSP. For example:<br><br> L1 -> TRX: CMD SETFORMAT 2<br> L1 <- TRX: RSP SETFORMAT 1 2<br><br> L1 -> TRX: CMD SETFORMAT 1<br> L1 <- TRX: RSP SETFORMAT 1 1<br><br>If no suitable VER_RSP is found, or the VER_REQ is incorrect,<br>the status code in the response shall be -1.<br><br>As soon as VER_RSP matches VER_REQ in the response, the process<br>of negotiation is complete. Changing the header version is<br>supposed to be done before POWERON, but can be also done after.<br><br>Change-Id: I8d441b2559863d2dbd680db371062e4f3a2f9ff9<br>Related: OS#4006<br>---<br>M src/target/trx_toolkit/ctrl_if_trx.py<br>M src/target/trx_toolkit/data_if.py<br>2 files changed, 70 insertions(+), 1 deletion(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;">git pull ssh://gerrit.osmocom.org:29418/osmocom-bb refs/changes/92/14692/1</pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;"><span>diff --git a/src/target/trx_toolkit/ctrl_if_trx.py b/src/target/trx_toolkit/ctrl_if_trx.py</span><br><span>index 26a844f..f696418 100644</span><br><span>--- a/src/target/trx_toolkit/ctrl_if_trx.py</span><br><span>+++ b/src/target/trx_toolkit/ctrl_if_trx.py</span><br><span>@@ -4,7 +4,7 @@</span><br><span> # TRX Toolkit</span><br><span> # CTRL interface implementation (common commands)</span><br><span> #</span><br><span style="color: hsl(0, 100%, 40%);">-# (C) 2016-2018 by Vadim Yanitskiy <axilirator@gmail.com></span><br><span style="color: hsl(120, 100%, 40%);">+# (C) 2016-2019 by Vadim Yanitskiy <axilirator@gmail.com></span><br><span> #</span><br><span> # All Rights Reserved</span><br><span> #</span><br><span>@@ -42,6 +42,45 @@</span><br><span> that is prioritized, i.e. it can overwrite any commands mentioned</span><br><span> above. If None is returned, a command is considered as unhandled.</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+ == TRXD header version negotiation</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ Messages on DATA interface may have different header formats,</span><br><span style="color: hsl(120, 100%, 40%);">+ defined by a version number, which can be negotiated on the</span><br><span style="color: hsl(120, 100%, 40%);">+ control interface. By default, the Transceiver will use the</span><br><span style="color: hsl(120, 100%, 40%);">+ legacy header version (0).</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ The header format negotiation can be initiated by the L1</span><br><span style="color: hsl(120, 100%, 40%);">+ using 'SETFORMAT' command. If the requested version is not</span><br><span style="color: hsl(120, 100%, 40%);">+ supported by the transceiver, status code of the response</span><br><span style="color: hsl(120, 100%, 40%);">+ message should indicate a preferred (basically, the latest)</span><br><span style="color: hsl(120, 100%, 40%);">+ version. The format of this message is the following:</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ L1 -> TRX: CMD SETFORMAT VER_REQ</span><br><span style="color: hsl(120, 100%, 40%);">+ L1 <- TRX: RSP SETFORMAT VER_RSP VER_REQ</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ where:</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ - VER_REQ is the requested version (suggested by the L1),</span><br><span style="color: hsl(120, 100%, 40%);">+ - VER_RSP is either the applied version if matches VER_REQ,</span><br><span style="color: hsl(120, 100%, 40%);">+ or a preferred version if VER_REQ is not supported.</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ If the transceiver indicates VER_RSP different than VER_REQ,</span><br><span style="color: hsl(120, 100%, 40%);">+ the L1 is supposed to reinitiate the version negotiation</span><br><span style="color: hsl(120, 100%, 40%);">+ using the suggested VER_RSP. For example:</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ L1 -> TRX: CMD SETFORMAT 2</span><br><span style="color: hsl(120, 100%, 40%);">+ L1 <- TRX: RSP SETFORMAT 1 2</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ L1 -> TRX: CMD SETFORMAT 1</span><br><span style="color: hsl(120, 100%, 40%);">+ L1 <- TRX: RSP SETFORMAT 1 1</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ If no suitable VER_RSP is found, or the VER_REQ is incorrect,</span><br><span style="color: hsl(120, 100%, 40%);">+ the status code in the response shall be -1.</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ As soon as VER_RSP matches VER_REQ in the response, the process</span><br><span style="color: hsl(120, 100%, 40%);">+ of negotiation is complete. Changing the header version is</span><br><span style="color: hsl(120, 100%, 40%);">+ supposed to be done before POWERON, but can be also done after.</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> """</span><br><span> </span><br><span> def __init__(self, trx, *udp_link_args):</span><br><span>@@ -147,6 +186,27 @@</span><br><span> </span><br><span> return (0, [str(meas_dbm)])</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+ # TRXD header version negotiation</span><br><span style="color: hsl(120, 100%, 40%);">+ if self.verify_cmd(request, "SETFORMAT", 1):</span><br><span style="color: hsl(120, 100%, 40%);">+ log.debug("(%s) Recv SETFORMAT cmd" % self.trx)</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ # Parse the requested version</span><br><span style="color: hsl(120, 100%, 40%);">+ ver_req = int(request[1])</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ log.info("(%s) Requested TRXD header version %u (current %u)"</span><br><span style="color: hsl(120, 100%, 40%);">+ % (self.trx, ver_req, self.trx.data_if._hdr_ver))</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if not self.trx.data_if.set_hdr_ver(ver_req):</span><br><span style="color: hsl(120, 100%, 40%);">+ ver_rsp = self.trx.data_if.pick_hdr_ver(ver_req)</span><br><span style="color: hsl(120, 100%, 40%);">+ log.error("(%s) Requested TRXD header version %u "</span><br><span style="color: hsl(120, 100%, 40%);">+ "is not supported, suggesting %u..."</span><br><span style="color: hsl(120, 100%, 40%);">+ % (self.trx, ver_req, ver_rsp))</span><br><span style="color: hsl(120, 100%, 40%);">+ return ver_rsp</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ log.info("(%s) Using TRXD header version %u"</span><br><span style="color: hsl(120, 100%, 40%);">+ % (self.trx, ver_req))</span><br><span style="color: hsl(120, 100%, 40%);">+ return ver_req</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> # Wrong / unknown command</span><br><span> else:</span><br><span> # We don't care about other commands,</span><br><span>diff --git a/src/target/trx_toolkit/data_if.py b/src/target/trx_toolkit/data_if.py</span><br><span>index 8ac0418..9f1f52a 100644</span><br><span>--- a/src/target/trx_toolkit/data_if.py</span><br><span>+++ b/src/target/trx_toolkit/data_if.py</span><br><span>@@ -42,6 +42,15 @@</span><br><span> self._hdr_ver = ver</span><br><span> return True</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+ def pick_hdr_ver(self, ver_req):</span><br><span style="color: hsl(120, 100%, 40%);">+ # Pick a version that is lower or equal to ver_req</span><br><span style="color: hsl(120, 100%, 40%);">+ for ver in DATAMSG.known_versions[::-1]:</span><br><span style="color: hsl(120, 100%, 40%);">+ if ver <= ver_req:</span><br><span style="color: hsl(120, 100%, 40%);">+ return ver</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ # No suitable version found</span><br><span style="color: hsl(120, 100%, 40%);">+ return -1</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> def match_hdr_ver(self, msg):</span><br><span> if msg.ver == self._hdr_ver:</span><br><span> return True</span><br><span></span><br></pre><p>To view, visit <a href="https://gerrit.osmocom.org/c/osmocom-bb/+/14692">change 14692</a>. 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<div style="display:none"> Gerrit-Project: osmocom-bb </div>
<div style="display:none"> Gerrit-Branch: master </div>
<div style="display:none"> Gerrit-Change-Id: I8d441b2559863d2dbd680db371062e4f3a2f9ff9 </div>
<div style="display:none"> Gerrit-Change-Number: 14692 </div>
<div style="display:none"> Gerrit-PatchSet: 1 </div>
<div style="display:none"> Gerrit-Owner: fixeria <axilirator@gmail.com> </div>
<div style="display:none"> Gerrit-MessageType: newchange </div>