<p>laforge <strong>submitted</strong> this change.</p><p><a href="https://gerrit.osmocom.org/c/osmo-gbproxy/+/25984">View Change</a></p><div style="white-space:pre-wrap">Approvals:
Jenkins Builder: Verified
pespin: Looks good to me, but someone else must approve
laforge: Looks good to me, approved
</div><pre style="font-family: monospace,monospace; white-space: pre-wrap;">gbproxy: Improve STATUS handling from SGSN<br><br>STATUS with cause bvci blocked or unknown should not be forwarded<br><br>Related: OS#4892<br>Change-Id: I0ab88634fe2eab5299ff4587fcef4177ce5b4831<br>---<br>M src/gb_proxy.c<br>1 file changed, 33 insertions(+), 13 deletions(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;"><span>diff --git a/src/gb_proxy.c b/src/gb_proxy.c</span><br><span>index 5c2d5bb..f92585a 100644</span><br><span>--- a/src/gb_proxy.c</span><br><span>+++ b/src/gb_proxy.c</span><br><span>@@ -1380,7 +1380,6 @@</span><br><span> uint16_t bvci;</span><br><span> char log_pfx[32];</span><br><span> int rc = 0;</span><br><span style="color: hsl(0, 100%, 40%);">- int cause;</span><br><span> int i;</span><br><span> bool paging_bc = false;</span><br><span> </span><br><span>@@ -1475,20 +1474,41 @@</span><br><span> rc = gbprox_rx_paging(nse, msg, pdut_name, &tp[0], ns_bvci, paging_bc);</span><br><span> break;</span><br><span> case BSSGP_PDUT_STATUS:</span><br><span style="color: hsl(0, 100%, 40%);">- /* Some exception has occurred */</span><br><span style="color: hsl(0, 100%, 40%);">- cause = *TLVP_VAL(&tp[0], BSSGP_IE_CAUSE);</span><br><span style="color: hsl(0, 100%, 40%);">- LOGPNSE(nse, LOGL_NOTICE, "Rx STATUS cause=0x%02x(%s) ", cause,</span><br><span style="color: hsl(120, 100%, 40%);">+ {</span><br><span style="color: hsl(120, 100%, 40%);">+ struct gbproxy_nse *nse_peer;</span><br><span style="color: hsl(120, 100%, 40%);">+ uint32_t tlli;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Check if the status needs to be terminated locally */</span><br><span style="color: hsl(120, 100%, 40%);">+ uint8_t cause = *TLVP_VAL(&tp[0], BSSGP_IE_CAUSE);</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (cause == BSSGP_CAUSE_UNKNOWN_BVCI || cause == BSSGP_CAUSE_BVCI_BLOCKED) {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* Log and handle locally, BVCI should be present for these causes */</span><br><span style="color: hsl(120, 100%, 40%);">+ if (!TLVP_PRESENT(&tp[0], BSSGP_IE_BVCI)) {</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGPNSE(nse, LOGL_ERROR, "Rx STATUS cause=0x%02x(%s), but BVCI is missing\n", cause,</span><br><span style="color: hsl(120, 100%, 40%);">+ bssgp_cause_str(cause));</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ uint16_t ptp_bvci = ntohs(tlvp_val16_unal(&tp[0], BSSGP_IE_BVCI));</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGPNSE(nse, LOGL_ERROR, "Rx STATUS cause=0x%02x(%s) for PtP-BVC %05u\n", cause,</span><br><span style="color: hsl(120, 100%, 40%);">+ bssgp_cause_str(cause), ptp_bvci);</span><br><span style="color: hsl(120, 100%, 40%);">+ /* FIXME: Remove/block the other BSS/SGSN BVCs if present? */</span><br><span style="color: hsl(120, 100%, 40%);">+ break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGPNSE(nse, LOGL_NOTICE, "Rx STATUS cause=0x%02x(%s)\n", cause,</span><br><span> bssgp_cause_str(cause));</span><br><span style="color: hsl(0, 100%, 40%);">- if (TLVP_PRES_LEN(&tp[0], BSSGP_IE_BVCI, 2)) {</span><br><span style="color: hsl(0, 100%, 40%);">- bvci = ntohs(tlvp_val16_unal(&tp[0], BSSGP_IE_BVCI));</span><br><span style="color: hsl(0, 100%, 40%);">- LOGPC(DGPRS, LOGL_NOTICE, "BVCI=%05u\n", bvci);</span><br><span style="color: hsl(0, 100%, 40%);">- sgsn_bvc = gbproxy_bvc_by_bvci(nse, bvci);</span><br><span style="color: hsl(0, 100%, 40%);">- /* don't send STATUS in response to STATUS if !bvc */</span><br><span style="color: hsl(0, 100%, 40%);">- if (sgsn_bvc && sgsn_bvc->cell && sgsn_bvc->cell->bss_bvc)</span><br><span style="color: hsl(0, 100%, 40%);">- rc = gbprox_relay2peer(msg, sgsn_bvc->cell->bss_bvc, ns_bvci);</span><br><span style="color: hsl(0, 100%, 40%);">- } else</span><br><span style="color: hsl(0, 100%, 40%);">- LOGPC(DGPRS, LOGL_NOTICE, "\n");</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ if (gbproxy_tlli_from_status_pdu(msg, tp, &tlli, log_pfx) == 0) {</span><br><span style="color: hsl(120, 100%, 40%);">+ nse_peer = gbproxy_nse_by_tlli(cfg, tlli);</span><br><span style="color: hsl(120, 100%, 40%);">+ if (nse_peer)</span><br><span style="color: hsl(120, 100%, 40%);">+ return gbprox_relay2nse(msg, nse_peer, 0);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ LOGPNSE(nse, LOGL_ERROR, "Unable to handle STATUS cause=0x%02x(%s)\n", cause,</span><br><span style="color: hsl(120, 100%, 40%);">+ bssgp_cause_str(cause));</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> break;</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span> /* those only exist in the SGSN -> BSS direction */</span><br><span> case BSSGP_PDUT_SUSPEND_ACK:</span><br><span> case BSSGP_PDUT_SUSPEND_NACK:</span><br><span></span><br></pre><p>To view, visit <a href="https://gerrit.osmocom.org/c/osmo-gbproxy/+/25984">change 25984</a>. 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<div style="display:none"> Gerrit-Project: osmo-gbproxy </div>
<div style="display:none"> Gerrit-Branch: master </div>
<div style="display:none"> Gerrit-Change-Id: I0ab88634fe2eab5299ff4587fcef4177ce5b4831 </div>
<div style="display:none"> Gerrit-Change-Number: 25984 </div>
<div style="display:none"> Gerrit-PatchSet: 1 </div>
<div style="display:none"> Gerrit-Owner: daniel <dwillmann@sysmocom.de> </div>
<div style="display:none"> Gerrit-Reviewer: Jenkins Builder </div>
<div style="display:none"> Gerrit-Reviewer: daniel <dwillmann@sysmocom.de> </div>
<div style="display:none"> Gerrit-Reviewer: laforge <laforge@osmocom.org> </div>
<div style="display:none"> Gerrit-Reviewer: pespin <pespin@sysmocom.de> </div>
<div style="display:none"> Gerrit-MessageType: merged </div>