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Track routing decisions made by fib_validate_source
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| kprobe:fib_validate_source { | |
| $skb = (struct sk_buff*) arg0; | |
| @skb[tid] = $skb; | |
| @ipheader[tid] = ((struct iphdr *) ($skb->head + $skb->network_header)); | |
| } | |
| kretprobe:fib_validate_source { | |
| $skb = @skb[tid]; | |
| $ipheader = @ipheader[tid]; | |
| $version = $ipheader->version; | |
| // 0xe9051eac is "172.30.5.233" in little-endian byte order. Replace this with an appropriate | |
| // value. | |
| if ((uint32)$ipheader->daddr == 0xe9051eac) { | |
| printf("%dv%d | %s:%s -> %d\n", $ipheader->protocol, $version, | |
| ntop($ipheader->saddr), ntop($ipheader->daddr), retval); | |
| } | |
| delete(@ipheader[tid]); | |
| delete(@skb[tid]); | |
| } | |
| END { | |
| clear(@ipheader); | |
| clear(@skb); | |
| } |
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