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本帖最后由 lxyscls 于 2010-03-05 11:13 编辑
正常系统strace情况如下:
18013 sendto(19, "\0\0\0\0\0\1\0\0\0\0\0\0\tNPI246B96\5local\0\0\1\0"..., 33, 0, {sa_family=AF_INET, sin_port=htons(5353), sin_addr=inet_addr("224.0.0.251")}, 16) = 33
18013 select(20, [19], NULL, NULL, {0, 500000}) = 1 (in [19], left {0, 496000})
返回为1
异常如下:
24998 sendto(14, "\0\0\0\0\0\1\0\0\0\0\0\0\tNPI246B96\5local\0\0\1\0"..., 33, 0, {sa_family=AF_INET, sin_port=htons(5353), sin_addr=inet_addr("224.0.0.251")}, 16) = 33
24998 select(15, [14], NULL, NULL, {0, 500000}) = 0 (Timeout)
不明白这个IP是作何解~程序即HPLIP(惠普打印机). |
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