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arpのキャッシュがないときにICMPのEcho Responseの送出に失敗する 

user@513e1cfd56c5:/microps$ ping 192.0.2.2
PING 192.0.2.2 (192.0.2.2) 56(84) bytes of data.
64 bytes from 192.0.2.2: icmp_seq=2 ttl=255 time=0.566 ms
64 bytes from 192.0.2.2: icmp_seq=3 ttl=255 time=0.665 ms
64 bytes from 192.0.2.2: icmp_seq=4 ttl=255 time=0.893 ms
64 bytes from 192.0.2.2: icmp_seq=5 ttl=255 time=1.20 ms
64 bytes from 192.0.2.2: icmp_seq=6 ttl=255 time=0.715 ms
64 bytes from 192.0.2.2: icmp_seq=7 ttl=255 time=0.250 ms
64 bytes from 192.0.2.2: icmp_seq=8 ttl=255 time=0.522 ms
64 bytes from 192.0.2.2: icmp_seq=9 ttl=255 time=1.12 ms
64 bytes from 192.0.2.2: icmp_seq=10 ttl=255 time=1.15 ms
64 bytes from 192.0.2.2: icmp_seq=11 ttl=255 time=0.638 ms
64 bytes from 192.0.2.2: icmp_seq=12 ttl=255 time=0.473 ms
64 bytes from 192.0.2.2: icmp_seq=13 ttl=255 time=0.464 ms
64 bytes from 192.0.2.2: icmp_seq=14 ttl=255 time=0.735 ms
^C
--- 192.0.2.2 ping statistics ---
14 packets transmitted, 13 received, 7.14286% packet loss, time 13157ms
rtt min/avg/max/mdev = 0.250/0.722/1.204/0.280 ms

IPデータグラムを送信するときにarpのキャッシュがヒットしない場合、キューにデータグラムを保存しておいて、キャッシュがアップデートされたタイミングで再送するようにすると良さそう

broadcastアドレスがおかしい

ba8a6dd

08:54:03.122 [I] ip_iface_register: registered: dev=net0, unicast=127.0.0.1, netmask=255.0.0.0, broadcast=1.0.0.0 (ip.c:242)
08:54:03.122 [I] ip_iface_register: registered: dev=net1, unicast=192.0.2.2, netmask=255.255.255.0, broadcast=1.0.0.0 (ip.c:242)

正しいログ

08:51:52.610 [I] ip_iface_register: registerd: dev=net0, unicast=127.0.0.1, netmask=255.0.0.0, broadcast=127.255.255.255 (ip.c:226)
08:51:52.610 [I] ip_iface_register: registerd: dev=net1, unicast=192.0.2.2, netmask=255.255.255.0, broadcast=192.0.2.255 (ip.c:226)

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