【正文】 .............................................................................. 5 ........................................................................................................................... 6 嵌入式 INTERNET................................................................................................................................. 7 嵌入式 Inter概念及特點 ...................................................................................................... 7 單片機接入 Inter方案 ........................................................................................................... 8 第 3章 網(wǎng)絡(luò)協(xié)議 .......................................................................................................................................10 TCP/IP 分層模型 ...............................................................................................................................10 數(shù)據(jù)封裝 ............................................................................................................................................ 11 數(shù)據(jù)幀分用 ........................................................................................................................................12 協(xié)議層簡介 ........................................................................................................................................13 網(wǎng)際層協(xié)議 ................................................................................................................................13 IP 地址分配 .............................................................................................................................14 地址解析協(xié)議 .........................................................................................................................15 ICMP 協(xié)議 ...............................................................................................................................16 傳輸控制協(xié)議 ............................................................................................................................16 TCP 連接 和釋放 ......................................................................................................................16 用戶數(shù)據(jù)報協(xié)議 .....................................................................................................................18 第四章 系統(tǒng)總體設(shè)計 ..........................................................................................................................19 硬件設(shè)計 ............................................................................................................................................19 TCP/IP 協(xié)議層選擇及分析 ...............................................................................................................20 鏈路層協(xié)議選擇及分析 ...........................................................................................................21 網(wǎng)絡(luò)層協(xié)議選擇及分析 ...........................................................................................................21 傳輸層協(xié)議選擇及分析 ...........................................................................................................21 應(yīng)用層協(xié)議選擇 ........................................................................................................................22 第五章 TCP/IP 協(xié)議棧的實現(xiàn) ..................................................................................................................24 ARP 協(xié)議的實現(xiàn) ................................................................................................................................24 ARP分組格式及數(shù)據(jù)結(jié)構(gòu) ........................................................................................................24 ARP協(xié)議軟件實現(xiàn) ....................................................................................................................24 IP 協(xié)議及其實現(xiàn) ................................................................................................................................26 IP數(shù)據(jù)報格式 ............................................................................................................................27 IP軟件實現(xiàn) ................................................................................................................................27 ICMP 報文協(xié)議的實現(xiàn) .....................................................................................................................29 2 TCP 協(xié)議的實現(xiàn) ................................................................................................................................30 TCP的報文段 .............................................................................................................................30 TCP 協(xié)議的實現(xiàn) .........................................................................................................................31 運輸控制塊 TCB.....................................................................................................................31 處理傳入數(shù)據(jù)模塊 ..................................................................................................................32 處理數(shù)據(jù)輸出模塊 ...............................................................................................................32 定時管理器 .............................................................................................................................34 SMTP 協(xié)議的實現(xiàn) .............................................................................................................................36 客戶機與服務(wù)器之間的交互 ...................................................................................................36 SMTP郵件協(xié)議的實現(xiàn) .............................................................................................................37 結(jié)束語 ............................................................................................................................................................39 致謝 .....................................................................................................................