From 2a5404c68f387523a833b8e9f17cda5b0c9ad727 Mon Sep 17 00:00:00 2001
From: 648540858 <648540858@qq.com>
Date: 星期四, 26 五月 2022 13:45:57 +0800
Subject: [PATCH] 兼容海康信令问题 #493

---
 src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java b/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java
index 7805679..349732b 100644
--- a/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java
+++ b/src/main/java/com/genersoft/iot/vmp/gb28181/transmit/cmd/SIPRequestHeaderProvider.java
@@ -225,11 +225,16 @@
 		return request;
 	}
 
-	public Request createInfoRequest(Device device, StreamInfo streamInfo, String content, Long cseq)
+	public Request createInfoRequest(Device device, StreamInfo streamInfo, String content)
 			throws PeerUnavailableException, ParseException, InvalidArgumentException {
 		Request request = null;
-		if (streamInfo == null) return null;
+		if (streamInfo == null) {
+			return null;
+		}
 		Dialog dialog = streamSession.getDialogByStream(streamInfo.getDeviceID(), streamInfo.getChannelId(), streamInfo.getStream());
+		if (dialog == null) {
+			return null;
+		}
 
 		SipURI requestLine = sipFactory.createAddressFactory().createSipURI(device.getDeviceId(),
 				device.getHostAddress());
@@ -255,8 +260,8 @@
 
 		// Forwards
 		MaxForwardsHeader maxForwards = sipFactory.createHeaderFactory().createMaxForwardsHeader(70);
-		
-		cseq = redisCatchStorage.getCSEQ(Request.INVITE);
+
+		Long cseq = redisCatchStorage.getCSEQ(Request.INVITE);
 		// ceq
 		CSeqHeader cSeqHeader = sipFactory.createHeaderFactory()
 				.createCSeqHeader(cseq, Request.INFO);

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