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Research and Implementation of Embedded TCP/IP Protocol Stack

Author: WangWenLiang
Tutor: LiYan
School: Harbin University of Science and Technology
Course: Computer Software and Theory
Keywords: TCP / IP protocol LwIP uC/OS- Ⅱ NAPT feature
CLC: TP393.04
Type: Master's thesis
Year: 2010
Downloads: 250
Quote: 1
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Abstract


LwIP Swiss Computer Sciences set for embedded system development and maintenance of open source TCP / IP protocol stack the characteristics LwIP very save memory resources , under normal circumstances , only need tens of thousands of bytes of random access memory and forty thousand the byte about read-only memory capable of normal operation , which makes LwIP protocol stack suitable for use in low-end embedded systems . However , LwIP did not achieve a complete TCP / IP protocol , Network Address Port Translation (NAPT) is LwIP unrealized characteristics , NAPT is a very important feature , multiple internal network addresses to share the same public IP access external networks. NAPT feature in existing LwIP , embedded real-time operating system uC / OS-II and S3C44B0X processor - based study transplantation LwIP . First , the article describes the TCP / IP protocols , including IP protocol , the TCP protocol , UDP protocol , ICMP protocol and the ARP protocol works , analysis LwIP the IP layer , UDP and TCP layers ; then design the LwIP application system overall structure of the overall structure planning ; Secondly , the uC / OS-II system was ported to the S3C44B0X processor , and to lay the platform foundation for LwIP transplant ; once again , the existing LwIP transplanted to create a good platform to study LwIP operating system simulation realization of the layer and the network interface layer ; Next, detailed analysis of the the NAPT feature original LwIP interface design ideas , design NAPT characteristics of the input processing function and output processing function function and to achieve them . Finally, uC / OS-II in the transplant on S3C44B0X the transplantation the Implementation of LwIP in uC / OS-II and LwIP NAPT feature function testing .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Communication protocols, communication protocols
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