dhcp客戶端源碼
Linux是專門做伺服器的，怎麼可能連個dhcp伺服器都沒有呢。。。 只是內核中沒有，有專門的dhcp伺服器軟體包，你可以直接安裝使用。 一般是dhcp-server或者isc-dhcp-server這個軟體包。
㈡ DHCP原理與實現
DHCP，DNS和HTTP是3種常見的高層協議。
DHCP(Dynamic Host Configuration Protocol),動態主機配置協議，是一個應用層協議。當我們將客戶主機ip地址設置為動態獲取方式時，DHCP伺服器就會根據DHCP協議給客戶端分配IP，使得客戶機能夠利用這個IP上網。
DHCP的前身是BOOTP協議（Bootstrap Protocol）,BOOTP被創建出來為連接到網路中的設備自動分配地址，後來被DHCP取代了，DHCP比BOOTP更加復雜，功能更強大。後面可以看到，在用Wireshark過濾顯示DHCP包，需要輸入過濾條件BOOTP，而不是DHCP,但或許是因為我使用的Wireshark版本是比較舊的1.12.9,沒有在新版本中嘗試過，也許可以輸入DHCP讓其只顯示DHCP包。
DHCP的實現分為4步，分別是：
第一步：Client端在區域網內發起一個DHCPDiscover包，目的是想發現能夠給它提供IP的DHCP Server。
第二步：可用的DHCP Server接收到Discover包之後，通過發送DHCP Offer包給予Client端應答，意在告訴Client端它可以提供IP地址。
第三步：Client端接收到Offer包之後，發送DHCP Request包請求分配IP。
第四步：DHCP Server發送ACK數據包，確認信息。
從以上演示可以看出這四步的實現過程：
DHCPDISCOVER ：DHCP客戶端eth0這個網卡發起了一個 廣播 ，發送DHCPDISCOVER數據包，訪問伺服器端的67 埠 。網路上每一台安裝了TCP/IP協議的主機都會接收到這種廣播信息，但只有DHCP伺服器才會做出響應。
DHCPOFFER ：DHCP的伺服器是192.168.199.254這個機器，伺服器端發送DHCPOFFER數據包給用戶端，表示可以提供192.168.199.130這個IP地址給它。在網路中接收到DHCPDISCOVER發現信息的DHCP伺服器都會做出響應，然後從尚未出租的IP地址中挑選一個分配給DHCP客戶機。
DHCPDISCOVER ：DHCP用戶端再次以發起 廣播 的方式，正式向伺服器請求分配已提供的IP地址(即192.168.199.130)。 正式請求DHCP伺服器分配地址DHCPREQUEST採用廣播包，是為了讓其它所有發送DHCPOFFER數據包的DHCP伺服器也能夠接收到該數據包，然後釋放已經OFFER（預分配）給客戶端的IP地址。
以廣播方式回答，簡單來說，是為了通知所有的DHCP伺服器，他將選擇某台DHCP伺服器所提供的IP地址。此外，如果發送給DHCP客戶端的地址已經被其他DHCP客戶端使用，客戶端會向伺服器發送DHCPDECLINE信息包拒絕接受已經分配的地址信息。
DHCPACK ：DHCP伺服器端向DHCP客戶端發送DHCPACK 單播 包，確認用戶端的請求。然後DHCP客戶機便將其TCP/IP協議與網卡綁定，另外，除DHCP客戶機選中的伺服器外，其他的DHCP伺服器都將收回曾提供的IP地址。
㈢ 路由器dhcp自動獲取ip地址配置代碼
1、向ISP了解相關的局端參數：
如果是靜態IP方式，請了解如下參數：靜態IP地址，子網掩碼，網關，DNS伺服器，備用DNS伺服器。
如果是動態IP方式：能夠從局端獲取IP地址，如果需要手動設置DNS伺服器地址，請向局端咨詢。
如果是PPPOE方式，請了解如下參數：用戶名，密碼。
2、按照說明書提示，連接好硬體。
3、如何進入TL-R410/460路由器設置界面？
路由器的出廠默認設置信息：
IP地址：192.168.1.1，子網掩碼：255.255.255.0。用戶名/密碼：admin/admin。
將與路由器相連的網卡IP設置在192.168.1.×網段（×表示2－254），在瀏覽器輸入http://192.168.1.1即可進入路由器設置界面，輕松完成設置。
㈣ 如何在dhcp源碼中添加一個option
看源碼，找到已有的option怎麼處理的，依葫蘆畫瓢。
option option-name code option-code = option-type;
The option-name must be unique from server defined options and consist of alphanumeric characters and 「-「. The option-code is typically between 128 and 254. Supported option-types include boolean, integer, string, text and IPv4 or IPv6 address, and domain list, as well as arrays, records, and encapsulation.
㈤ 如何分析DHCP源代碼求高手指點
您說的是Linux or Unix下的DHCPD服務?
㈥ 關於DHCP Client
DHCP是給客戶機自動分配IP 地址 等等的功能用的服務，如果關閉了，手動分配IP地址也是一樣的效果
必須啟動網路服務才能啟動這個的
或者
檢查以下服務是否開啟 IPSEC driver ,TCP/IP NetBIOS Helper 如果被關閉或已經用 把這3個（dhcp client ,IPSEC driver ,TCP/IP NetBIOS Helper ）服務的啟動類型改為自動 然後重啟計算機
或者
你把一下代碼保存成.reg文件 然後導入注冊表 在啟動試試
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp]
"Type"=dword:00000020
"Start"=dword:00000002
"ErrorControl"=dword:00000001
"ImagePath"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,\
74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,\
00,76,00,63,00,68,00,6f,00,73,00,74,00,2e,00,65,00,78,00,65,00,20,00,2d,00,\
6b,00,20,00,6e,00,65,00,74,00,73,00,76,00,63,00,73,00,00,00
"DisplayName"="DHCP Client"
"Group"="TDI"
"DependOnService"=hex(7):54,00,63,00,70,00,69,00,70,00,00,00,41,00,66,00,64,00,\
00,00,4e,00,65,00,74,00,42,00,54,00,00,00,00,00
"DependOnGroup"=hex(7):00,00
"ObjectName"="LocalSystem"
"Description"="通過注冊和更改 IP 地址以及 DNS 名稱來管理網路配置。"
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Configurations]
"Options"=hex:32,00,00,00,00,00,00,00,04,00,00,00,00,00,00,00,ff,ff,ff,7f,00,\
00,00,00,01,00,00,00,00,00,00,00,04,00,00,00,00,00,00,00,ff,ff,ff,7f,00,00,\
00,00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Linkage]
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Linkage\Disabled]
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters]
"ServiceDll"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,\
00,74,00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,\
64,00,68,00,63,00,70,00,63,00,73,00,76,00,63,00,2e,00,64,00,6c,00,6c,00,00,\
00
"{762AA59C-983A-418F-9E6E-CEFD5ABEDA39}"=hex:0f,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,4c,f8,3c,48,f9,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
4c,f8,3c,48,01,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,4c,f8,3c,48,2b,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,4c,f8,3c,48,2c,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,4c,f8,3c,48,06,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,4c,f8,3c,48
"{F272A1D0-B231-4378-AC93-928420601A85}"=hex:0f,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,62,e8,6a,48,f9,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\
62,e8,6a,48,01,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,62,e8,6a,48,2b,\
00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,62,e8,6a,48,2c,00,00,00,00,00,\
00,00,00,00,00,00,00,00,00,00,62,e8,6a,48,06,00,00,00,00,00,00,00,00,00,00,\
00,00,00,00,00,62,e8,6a,48
"{560B04A4-B8F5-41DC-83F7-38990023D167}"=hex:01,00,00,00,00,00,00,00,04,00,00,\
00,00,00,00,00,46,88,24,4a,ff,ff,ff,00,33,00,00,00,00,00,00,00,04,00,00,00,\
00,00,00,00,46,88,24,4a,01,e1,33,80,36,00,00,00,00,00,00,00,04,00,00,00,00,\
00,00,00,46,88,24,4a,0a,08,00,00,35,00,00,00,00,00,00,00,01,00,00,00,00,00,\
00,00,46,88,24,4a,05,00,00,00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters\Options]
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters\Options\1]
"KeyType"=dword:00000007
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
00,72,00,65,00,6e,00,74,00,43,00,6f,00,6e,00,74,00,72,00,6f,00,6c,00,53,00,\
65,00,74,00,5c,00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,73,00,5c,00,54,\
00,63,00,70,00,69,00,70,00,5c,00,50,00,61,00,72,00,61,00,6d,00,65,00,74,00,\
65,00,72,00,73,00,5c,00,49,00,6e,00,74,00,65,00,72,00,66,00,61,00,63,00,65,\
00,73,00,5c,00,3f,00,5c,00,44,00,68,00,63,00,70,00,53,00,75,00,62,00,6e,00,\
65,00,74,00,4d,00,61,00,73,00,6b,00,4f,00,70,00,74,00,00,00,53,00,59,00,53,\
00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,00,72,00,65,00,6e,00,74,00,43,00,\
6f,00,6e,00,74,00,72,00,6f,00,6c,00,53,00,65,00,74,00,5c,00,53,00,65,00,72,\
00,76,00,69,00,63,00,65,00,73,00,5c,00,3f,00,5c,00,50,00,61,00,72,00,61,00,\
6d,00,65,00,74,00,65,00,72,00,73,00,5c,00,54,00,63,00,70,00,69,00,70,00,5c,\
00,44,00,68,00,63,00,70,00,53,00,75,00,62,00,6e,00,65,00,74,00,4d,00,61,00,\
73,00,6b,00,4f,00,70,00,74,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters\Options\15]
"KeyType"=dword:00000001
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
00,72,00,65,00,6e,00,74,00,43,00,6f,00,6e,00,74,00,72,00,6f,00,6c,00,53,00,\
65,00,74,00,5c,00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,73,00,5c,00,54,\
00,63,00,70,00,69,00,70,00,5c,00,50,00,61,00,72,00,61,00,6d,00,65,00,74,00,\
65,00,72,00,73,00,5c,00,49,00,6e,00,74,00,65,00,72,00,66,00,61,00,63,00,65,\
00,73,00,5c,00,3f,00,5c,00,44,00,68,00,63,00,70,00,44,00,6f,00,6d,00,61,00,\
69,00,6e,00,00,00,53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
00,72,00,65,00,6e,00,74,00,43,00,6f,00,6e,00,74,00,72,00,6f,00,6c,00,53,00,\
65,00,74,00,5c,00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,73,00,5c,00,54,\
00,63,00,70,00,49,00,70,00,5c,00,50,00,61,00,72,00,61,00,6d,00,65,00,74,00,\
65,00,72,00,73,00,5c,00,44,00,68,00,63,00,70,00,44,00,6f,00,6d,00,61,00,69,\
00,6e,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters\Options\3]
"KeyType"=dword:00000007
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
00,72,00,65,00,6e,00,74,00,43,00,6f,00,6e,00,74,00,72,00,6f,00,6c,00,53,00,\
65,00,74,00,5c,00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,73,00,5c,00,54,\
00,63,00,70,00,69,00,70,00,5c,00,50,00,61,00,72,00,61,00,6d,00,65,00,74,00,\
65,00,72,00,73,00,5c,00,49,00,6e,00,74,00,65,00,72,00,66,00,61,00,63,00,65,\
00,73,00,5c,00,3f,00,5c,00,44,00,68,00,63,00,70,00,44,00,65,00,66,00,61,00,\
75,00,6c,00,74,00,47,00,61,00,74,00,65,00,77,00,61,00,79,00,00,00,53,00,59,\
00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,00,72,00,65,00,6e,00,74,00,\
43,00,6f,00,6e,00,74,00,72,00,6f,00,6c,00,53,00,65,00,74,00,5c,00,53,00,65,\
00,72,00,76,00,69,00,63,00,65,00,73,00,5c,00,3f,00,5c,00,50,00,61,00,72,00,\
61,00,6d,00,65,00,74,00,65,00,72,00,73,00,5c,00,54,00,63,00,70,00,69,00,70,\
00,5c,00,44,00,68,00,63,00,70,00,44,00,65,00,66,00,61,00,75,00,6c,00,74,00,\
47,00,61,00,74,00,65,00,77,00,61,00,79,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters\Options\44]
"KeyType"=dword:00000001
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
00,72,00,65,00,6e,00,74,00,43,00,6f,00,6e,00,74,00,72,00,6f,00,6c,00,53,00,\
65,00,74,00,5c,00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,73,00,5c,00,4e,\
00,65,00,74,00,42,00,54,00,5c,00,50,00,61,00,72,00,61,00,6d,00,65,00,74,00,\
65,00,72,00,73,00,5c,00,49,00,6e,00,74,00,65,00,72,00,66,00,61,00,63,00,65,\
00,73,00,5c,00,54,00,63,00,70,00,69,00,70,00,5f,00,3f,00,5c,00,44,00,68,00,\
63,00,70,00,4e,00,61,00,6d,00,65,00,53,00,65,00,72,00,76,00,65,00,72,00,4c,\
00,69,00,73,00,74,00,00,00,53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,\
75,00,72,00,72,00,65,00,6e,00,74,00,43,00,6f,00,6e,00,74,00,72,00,6f,00,6c,\
00,53,00,65,00,74,00,5c,00,53,00,65,00,72,00,76,00,69,00,63,00,65,00,73,00,\
5c,00,4e,00,65,00,74,00,42,00,54,00,5c,00,41,00,64,00,61,00,70,00,74,00,65,\
00,72,00,73,00,5c,00,3f,00,5c,00,44,00,68,00,63,00,70,00,4e,00,61,00,6d,00,\
65,00,53,00,65,00,72,00,76,00,65,00,72,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters\Options\46]
"KeyType"=dword:00000004
"RegLocation"="SYSTEM\\CurrentControlSet\\Services\\NetBT\\Parameters\\DhcpNodeType"
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters\Options\47]
"KeyType"=dword:00000001
"RegLocation"="SYSTEM\\CurrentControlSet\\Services\\NetBT\\Parameters\\DhcpScopeID"
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters\Options\6]
"KeyType"=dword:00000001
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
00,72,00,65,00,6e,00,74,00,43,00,6f,00,6e,00,74,00,72,00,6f,00,6c,00,53,00,\
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00,65,00,73,00,5c,00,54,00,63,00,70,00,69,00,70,00,5c,00,50,00,61,00,72,00,\
61,00,6d,00,65,00,74,00,65,00,72,00,73,00,5c,00,44,00,68,00,63,00,70,00,4e,\
00,61,00,6d,00,65,00,53,00,65,00,72,00,76,00,65,00,72,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Parameters\Options\DhcpNetbiosOptions]
"KeyType"=dword:00000004
"OptionId"=dword:00000001
"VendorType"=dword:00000001
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
00,72,00,65,00,6e,00,74,00,43,00,6f,00,6e,00,74,00,72,00,6f,00,6c,00,53,00,\
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00,6f,00,6e,00,73,00,00,00,00,00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Security]
"Security"=hex:01,00,14,80,90,00,00,00,9c,00,00,00,14,00,00,00,30,00,00,00,02,\
00,1c,00,01,00,00,00,02,80,14,00,ff,01,0f,00,01,01,00,00,00,00,00,01,00,00,\
00,00,02,00,60,00,04,00,00,00,00,00,14,00,8d,01,02,00,01,01,00,00,00,00,00,\
05,0b,00,00,00,00,00,18,00,fd,01,02,00,01,02,00,00,00,00,00,05,20,00,00,00,\
2c,02,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,20,\
02,00,00,00,00,14,00,fd,01,02,00,01,01,00,00,00,00,00,05,12,00,00,00,01,01,\
00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Dhcp\Enum]
"0"="Root\\LEGACY_DHCP\\0000"
"Count"=dword:00000001
"NextInstance"=dword:00000001
㈦ 用虛擬機Linux源碼編譯DHCP服務並部署一個DHCP伺服器,找一個客戶端能夠自動獲取IP地址
摘要 關於用虛擬機ubuntu14.04搭建dhcp伺服器並在客戶端windows上面做自動獲取IP的測試，之前也看了很多文章，查了很多資料，一點點也積累了不少，但是可能是因環境的不同或者其它什麼細節的問題，導致搭建了很久還是沒成功，今晚又倒騰了很久，終於搭建成功並通過測試，下面是自己的一點小體會跟大家一起分享，希望大家收益。
㈧ 在Linux下如何安裝用源碼安裝和配置DHCP
一般的源碼包都是如下步驟
1打開終端
2先解壓源碼包tar -xz/jvf XXXXX.gz/bz2
3然後進入解壓目錄 cd XXXXX
4然後收入./configure
5接著 make
6最後 make install
最重要是看README文件，裡面會有安裝方法。
㈨ linux系統本身支持DHCP伺服器嗎內核中有DHCP伺服器源碼嗎想實現DHCP伺服器的方法有哪些
Linux是專門做伺服器的，怎麼可能連個dhcp伺服器都沒有呢。。。
只是內核中沒有，有專門的dhcp伺服器軟體包，你可以直接安裝使用。
一般是dhcp-server或者isc-dhcp-server這個軟體包。
㈩ 您好，我想用Python實現DHCP客戶與伺服器的交互，可否給我講解一下代碼
這個不是講解的問題，你要去看Linux操作系統中DHCP處理的源代碼