dhcp客户端源码
Linux是专门做服务器的，怎么可能连个dhcp服务器都没有呢。。。 只是内核中没有，有专门的dhcp服务器软件包，你可以直接安装使用。 一般是dhcp-server或者isc-dhcp-server这个软件包。
㈡ DHCP原理与实现
DHCP，DNS和HTTP是3种常见的高层协议。
DHCP(Dynamic Host Configuration Protocol),动态主机配置协议，是一个应用层协议。当我们将客户主机ip地址设置为动态获取方式时，DHCP服务器就会根据DHCP协议给客户端分配IP，使得客户机能够利用这个IP上网。
DHCP的前身是BOOTP协议（Bootstrap Protocol）,BOOTP被创建出来为连接到网络中的设备自动分配地址，后来被DHCP取代了，DHCP比BOOTP更加复杂，功能更强大。后面可以看到，在用Wireshark过滤显示DHCP包，需要输入过滤条件BOOTP，而不是DHCP,但或许是因为我使用的Wireshark版本是比较旧的1.12.9,没有在新版本中尝试过，也许可以输入DHCP让其只显示DHCP包。
DHCP的实现分为4步，分别是：
第一步：Client端在局域网内发起一个DHCPDiscover包，目的是想发现能够给它提供IP的DHCP Server。
第二步：可用的DHCP Server接收到Discover包之后，通过发送DHCP Offer包给予Client端应答，意在告诉Client端它可以提供IP地址。
第三步：Client端接收到Offer包之后，发送DHCP Request包请求分配IP。
第四步：DHCP Server发送ACK数据包，确认信息。
从以上演示可以看出这四步的实现过程：
DHCPDISCOVER ：DHCP客户端eth0这个网卡发起了一个 广播 ，发送DHCPDISCOVER数据包，访问服务器端的67 端口 。网络上每一台安装了TCP/IP协议的主机都会接收到这种广播信息，但只有DHCP服务器才会做出响应。
DHCPOFFER ：DHCP的服务器是192.168.199.254这个机器，服务器端发送DHCPOFFER数据包给用户端，表示可以提供192.168.199.130这个IP地址给它。在网络中接收到DHCPDISCOVER发现信息的DHCP服务器都会做出响应，然后从尚未出租的IP地址中挑选一个分配给DHCP客户机。
DHCPDISCOVER ：DHCP用户端再次以发起 广播 的方式，正式向服务器请求分配已提供的IP地址(即192.168.199.130)。 正式请求DHCP服务器分配地址DHCPREQUEST采用广播包，是为了让其它所有发送DHCPOFFER数据包的DHCP服务器也能够接收到该数据包，然后释放已经OFFER（预分配）给客户端的IP地址。
以广播方式回答，简单来说，是为了通知所有的DHCP服务器，他将选择某台DHCP服务器所提供的IP地址。此外，如果发送给DHCP客户端的地址已经被其他DHCP客户端使用，客户端会向服务器发送DHCPDECLINE信息包拒绝接受已经分配的地址信息。
DHCPACK ：DHCP服务器端向DHCP客户端发送DHCPACK 单播 包，确认用户端的请求。然后DHCP客户机便将其TCP/IP协议与网卡绑定，另外，除DHCP客户机选中的服务器外，其他的DHCP服务器都将收回曾提供的IP地址。
㈢ 路由器dhcp自动获取ip地址配置代码
1、向ISP了解相关的局端参数：
如果是静态IP方式，请了解如下参数：静态IP地址，子网掩码，网关，DNS服务器，备用DNS服务器。
如果是动态IP方式：能够从局端获取IP地址，如果需要手动设置DNS服务器地址，请向局端咨询。
如果是PPPOE方式，请了解如下参数：用户名，密码。
2、按照说明书提示，连接好硬件。
3、如何进入TL-R410/460路由器设置界面？
路由器的出厂默认设置信息：
IP地址：192.168.1.1，子网掩码：255.255.255.0。用户名/密码：admin/admin。
将与路由器相连的网卡IP设置在192.168.1.×网段（×表示2－254），在浏览器输入http://192.168.1.1即可进入路由器设置界面，轻松完成设置。
㈣ 如何在dhcp源码中添加一个option
看源码，找到已有的option怎么处理的，依葫芦画瓢。
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源代码求高手指点
您说的是Linux or Unix下的DHCPD服务?
㈥ 关于DHCP Client
DHCP是给客户机自动分配IP 地址 等等的功能用的服务，如果关闭了，手动分配IP地址也是一样的效果
必须启动网络服务才能启动这个的
或者
检查以下服务是否开启 IPSEC driver ,TCP/IP NetBIOS Helper 如果被关闭或已经用 把这3个（dhcp client ,IPSEC driver ,TCP/IP NetBIOS Helper ）服务的启动类型改为自动 然后重启计算机
或者
你把一下代码保存成.reg文件 然后导入注册表 在启动试试
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"="通过注册和更改 IP 地址以及 DNS 名称来管理网络配置。"
[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,\
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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,\
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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,\
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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,\
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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,\
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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,\
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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,\
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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,\
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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,\
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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,\
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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,\
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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,\
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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 用虚拟机Linux源码编译DHCP服务并部署一个DHCP服务器,找一个客户端能够自动获取IP地址
摘要 关于用虚拟机ubuntu14.04搭建dhcp服务器并在客户端windows上面做自动获取IP的测试，之前也看了很多文章，查了很多资料，一点点也积累了不少，但是可能是因环境的不同或者其它什么细节的问题，导致搭建了很久还是没成功，今晚又倒腾了很久，终于搭建成功并通过测试，下面是自己的一点小体会跟大家一起分享，希望大家收益。
㈧ 在Linux下如何安装用源码安装和配置DHCP
一般的源码包都是如下步骤
1打开终端
2先解压源码包tar -xz/jvf XXXXX.gz/bz2
3然后进入解压目录 cd XXXXX
4然后收入./configure
5接着 make
6最后 make install
最重要是看README文件，里面会有安装方法。
㈨ linux系统本身支持DHCP服务器吗内核中有DHCP服务器源码吗想实现DHCP服务器的方法有哪些
Linux是专门做服务器的，怎么可能连个dhcp服务器都没有呢。。。
只是内核中没有，有专门的dhcp服务器软件包，你可以直接安装使用。
一般是dhcp-server或者isc-dhcp-server这个软件包。
㈩ 您好，我想用Python实现DHCP客户与服务器的交互，可否给我讲解一下代码
这个不是讲解的问题，你要去看Linux操作系统中DHCP处理的源代码