【摘要】： 隨著Internet的廣泛應(yīng)用,越來越多關(guān)鍵業(yè)務(wù)的開展依賴于互聯(lián)網(wǎng)絡(luò)進行。盡管近年來科技的發(fā)展使得互聯(lián)網(wǎng)絡(luò)的帶寬得到不斷擴充,但是一些關(guān)鍵業(yè)務(wù)的網(wǎng)絡(luò)服務(wù)質(zhì)量仍然無法得到有效的保障。究其原因是在現(xiàn)有互聯(lián)網(wǎng)絡(luò)中缺乏對網(wǎng)絡(luò)流量有效的識別和控制技術(shù)。一些非關(guān)鍵業(yè)務(wù),如P2P,消耗大量網(wǎng)絡(luò)帶寬,影響關(guān)鍵業(yè)務(wù)傳輸質(zhì)量,從而嚴重干擾了網(wǎng)絡(luò)的正常運行。因此,研究網(wǎng)絡(luò)流量識別與控制技術(shù),并將其用于管理有限的網(wǎng)絡(luò)帶寬,對于保障計算機網(wǎng)絡(luò)服務(wù)質(zhì)量有非常重要的意義。 論文首先從網(wǎng)絡(luò)流量管理角度出發(fā),分析了網(wǎng)絡(luò)流量管理領(lǐng)域的關(guān)鍵技術(shù),包括流量識別分類與流量控制管理兩方面。接下來,論文具體針對Linux操作系統(tǒng)平臺,研究了網(wǎng)絡(luò)流量管理系統(tǒng)的實現(xiàn)方法,取得了以下創(chuàng)新工作成果: 深入分析了Linux操作系統(tǒng)內(nèi)核網(wǎng)絡(luò)處理模塊的原理及工作機制,在此基礎(chǔ)上提出了基于Linux操作系統(tǒng)的網(wǎng)絡(luò)流量管理系統(tǒng)模型及設(shè)計方案。其中,通過配置和操控Linux內(nèi)核的網(wǎng)絡(luò)防火墻Netfilter框架及l(fā)7-filter工具實現(xiàn)了網(wǎng)絡(luò)層到應(yīng)用層流量的識別。同時,論文改進了Netfilter中連接跟蹤模塊nf_conntrack的HASH算法,提高了流量識別分類速度。另一方面,以Linux內(nèi)核的網(wǎng)絡(luò)服務(wù)質(zhì)量框架及其用戶接口工具tc為基礎(chǔ),研究了流量控制管理的方法,并結(jié)合分層次的令牌桶隊列規(guī)則HTB,提出了一套流量控制管理的策略。 基于上述研究,論文在32位X86硬件平臺和Linux操作系統(tǒng)上實現(xiàn)了基于GTK+圖形用戶界面的FreeBM網(wǎng)絡(luò)流量管理系統(tǒng)。最后通過實驗測試,驗證了FreeBM系統(tǒng)識別和控制網(wǎng)絡(luò)流量的有效性和準確性。
[Abstract]:With the wide application of Internet, more and more key services depend on the Internet. In recent years, with the development of science and technology, the bandwidth of the Internet has been continuously expanded, but the quality of service of some key services still can not be effectively guaranteed. This is due to the lack of effective identification and control techniques for network traffic in existing Internet networks. Some non-critical services, such as P2P, consume a lot of network bandwidth and affect the transmission quality of critical services, thus seriously disrupting the normal operation of the network. Therefore, it is very important to study the network traffic identification and control technology and use it to manage the limited network bandwidth to ensure the quality of service of computer network. Firstly, from the point of view of network traffic management, the paper analyzes the key technologies of network traffic management, including traffic identification classification and traffic control management. Then, the paper studies the realization method of network traffic management system based on Linux operating system. The main achievements are as follows: the principle and working mechanism of the kernel network processing module of Linux operating system are deeply analyzed, and the model and design scheme of network traffic management system based on Linux operating system are put forward. The network firewall Netfilter framework and l7-filter tools which configure and manipulate the Linux kernel are used to identify the traffic from the network layer to the application layer. At the same time, the paper improves the HASH algorithm of nf_conntrack in Netfilter, and improves the speed of traffic recognition and classification. On the other hand, based on the network QoS framework of the Linux kernel and its user interface tool tc, this paper studies the method of traffic control management, and proposes a set of traffic control management strategies combined with the hierarchical token bucket queue rule (HTB,). Based on the above research, this paper implements the FreeBM network traffic management system based on GTK graphical user interface on 32-bit X86 hardware platform and Linux operating system. Finally, the validity and accuracy of FreeBM system to identify and control network traffic are verified by experimental test.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2008
【分類號】：TP393.08

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相關(guān)期刊論文 前3條

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本文編號：2387823