For an ARP request or reply packet, the value of this field is 4. OP 16 bit Indicates the operation type. 1: ARP Request 2: ARP Reply 3: RARP Request 4: RARP Reply Ethernet Address of Sender 48 bit Indicates the MAC address of the message sender. This field is of the same ...
RARP Objectives TCP/IP Protocol Suite 2 Figure 7.1 ARP and RARP 物理地址:MAC, 本地地址 逻辑地址:IP 动态映射:MAC～IP TCP/IP Protocol Suite 3 Figure 7.2 Position of ARP and RARP in TCP/IP protocol suite TCP/IP Protocol Suite 4 7.1 ARP ARP ARP associates associates an an IP IP address ...
就可能出现这种情况,使用第一个应答可避免ARP受损,并确保选择的是最快的路由器。 */override=time_after(jiffies,n->updated+NEIGH_VAR(n->parms,LOCKTIME))||is_garp;/* Broadcast replies and request packets do not assert neighbour reachability. */if(arp->ar_op!=htons(ARPOP_REPLY)||skb->pkt_ty...
第七章ARP,RARP Chapter7 ARPandRARP Addresses Hostidentifier IPaddress NetworkMapDataLinkPhysical 单位名称（逻辑）单位地址（物理） Physicaladdress To：上海理工大学上海市杨浦区军工路516号 Issues AB C D E A送往E的分组需封装在Ethernet帧中传送 IP地址：全局性A仅知道：IPA，MACA，IPE...
ARP命令可用于查询本机ARP缓存中IP地址和MAC地址的对应关系、添加或删除静态对应关系等。相关协议有RARP、代理ARP。NDP用于在IPv6中代替地址解析协议。 代理ARP(proxy ARP):对于没有配置缺省网关的计算机要和其他网络中的计算机实现通信,网关收到源计算机的 ARP 请求会使用自己的 MAC 地址与目标计算机的 IP地址对源...
unsigned short arp_pro; /* format of protocol address */ unsigned char arp_hln; /* length of hardware address */ unsigned char arp_pln; /* length of protocol address */ unsigned short arp_op; /* ARP/RARP operation */ unsigned char arp_sha[6]; /* sender hardware address */ ...
IfthehostsendsARPfreejustchangethehardwareaddress(thehostislikelytobeshutdown,andwrapapieceofinterfacecard,andthenrestart),thenthisgroupcanmakethecachehostofotheroldhardwareaddresstoupdatethecorresponding.RARP RARPpacketformatconsistentwiththeARPpacket(seeFigure4-3).ThemaindifferencebetweenthemistheRARPrequestor...
//arp_protocol_packet_callback(arg, pkthdr, pktdata);// 调用解析ARP数据包的函数 break; case 0x0835: printf(" Ethernet type: RARP\n"); break; default: printf(" Ethernet type: 其他\n"); break; } } int main() { pcap_t* pcap_handle = NULL; ...
To do so, the network administrator must establish the mapping between MAC addresses and IP addresses on a gateway. When a new host is configured, its RARP client requests the host's IP address from the RARP server on the gateway. Implementation ARP implementation within a network segment Figur...
unsigned shortarp_hrd; /* format of hardware address */ unsigned shortarp_pro; /* format of protocol address */ unsigned chararp_hln; /* length of hardware address */ unsigned chararp_pln; /* length of protocol address */ unsigned shortarp_op; /* ARP/RARP operation */ ...