ICMP代码与类型
TYPE | CODE | Description | Query | Error |
---|---|---|---|---|
0 | 0 | Echo Reply——回显应答(Ping应答) | x | |
3 | 0 | Network Unreachable——网络不可达 | | x |
3 | 1 | Host Unreachable——主机不可达 | | x |
3 | 2 | Protocol Unreachable——协议不可达 | | x |
3 | 3 | Port Unreachable——端口不可达 | | x |
3 | 4 | Fragmentation needed but no frag. bit set——需要进行分片但设置不分片比特 | | x |
3 | 5 | Source routing failed——源站选路失败 | | x |
3 | 6 | Destination network unknown——目的网络未知 | | x |
3 | 7 | Destination host unknown——目的主机未知 | | x |
3 | 8 | Source host isolated (obsolete)——源主机被隔离(作废不用) | | x |
3 | 9 | Destination network administratively prohibited——目的网络被强制禁止 | | x |
3 | 10 | Destination host administratively prohibited——目的主机被强制禁止 | | x |
3 | 11 | Network unreachable for TOS——由于服务类型TOS,网络不可达 | | x |
3 | 12 | Host unreachable for TOS——由于服务类型TOS,主机不可达 | | x |
3 | 13 | Communication administratively prohibited by filtering——由于过滤,通信被强制禁止 | | x |
3 | 14 | Host precedence violation——主机越权 | | x |
3 | 15 | Precedence cutoff in effect——优先中止生效 | | x |
4 | 0 | Source quench——源端被关闭(基本流控制) | | |
5 | 0 | Redirect for network——对网络重定向 | | |
5 | 1 | Redirect for host——对主机重定向 | | |
5 | 2 | Redirect for TOS and network——对服务类型和网络重定向 | | |
5 | 3 | Redirect for TOS and host——对服务类型和主机重定向 | | |
8 | 0 | Echo request——回显请求(Ping请求) | x | |
9 | 0 | Router advertisement——路由器通告 | | |
10 | 0 | Route solicitation——路由器请求 | | |
11 | 0 | TTL equals 0 during transit——传输期间生存时间为0 | | x |
11 | 1 | TTL equals 0 during reassembly——在数据报组装期间生存时间为0 | | x |
12 | 0 | IP header bad (catchall error)——坏的IP首部(包括各种差错) | | x |
12 | 1 | Required options missing——缺少必需的选项 | | x |
13 | 0 | Timestamp request (obsolete)——时间戳请求(作废不用) | x | |
14 | | Timestamp reply (obsolete)——时间戳应答(作废不用) | x | |
15 | 0 | Information request (obsolete)——信息请求(作废不用) | x | |
16 | 0 | Information reply (obsolete)——信息应答(作废不用) | x | |
17 | 0 | Address mask request——地址掩码请求 | x | |
18 | 0 | Address mask reply——地址掩码应答 |