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tcpv4tracer.py: eBPF: fix tcp dport

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This commit is contained in:
Alban Crequy
2016-10-05 16:02:45 +02:00
committed by Lorenzo Manacorda
parent 4d948a5888
commit c7888ee08a
1 changed files with 3 additions and 2 deletions
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5
docker/tcpv4tracer.py
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@@ -169,9 +169,10 @@ int kretprobe__inet_csk_accept(struct pt_regs *ctx)
return 0;
// pull in details
u16 family = 0, lport = 0;
u16 family = 0, lport = 0, dport = 0;
bpf_probe_read(&family, sizeof(family), &newsk->__sk_common.skc_family);
bpf_probe_read(&lport, sizeof(lport), &newsk->__sk_common.skc_num);
bpf_probe_read(&dport, sizeof(dport), &newsk->__sk_common.skc_dport);
if (family == AF_INET) {
struct tcp_event_t evt = {.type = "accept", .pid = pid >> 32};
@@ -180,7 +181,7 @@ int kretprobe__inet_csk_accept(struct pt_regs *ctx)
bpf_probe_read(&evt.daddr, sizeof(u32),
&newsk->__sk_common.skc_daddr);
evt.sport = lport;
evt.dport = 0;
evt.dport = ntohs(dport);
tcp_event.perf_submit(ctx, &evt, sizeof(evt));
}
// else drop