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ctdb-tools: Improve/add debug

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In particular, knowing the reason fetching the packet fails can help
with debugging unsupported protocols in the pcap code.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
This commit is contained in:
Martin Schwenke 2022-08-15 09:41:09 +10:00 committed by Amitay Isaacs
parent 33a80c1d63
commit 5dd964aa02
1 changed files with 7 additions and 6 deletions
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13
ctdb/tools/ctdb_killtcp.c
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@ -169,17 +169,18 @@ static void reset_connections_capture_tcp_handler(struct tevent_context *ev,
&conn.server, &conn.client, &conn.server, &conn.client,
&ack_seq, &seq, &rst, &window); &ack_seq, &seq, &rst, &window);
if (ret != 0) { if (ret != 0) {
/* probably a non-tcp ACK packet */ /* Not a TCP-ACK? Unexpected protocol? */
DBG_DEBUG("Failed to parse packet, errno=%d\n", ret);
return; return;
} }
if (window == htons(1234) && (rst || seq == 0)) { if (window == htons(1234) && (rst || seq == 0)) {
/* Ignore packets that we sent! */ /* Ignore packets that we sent! */
D_DEBUG("Ignoring packet: %s, " DBG_DEBUG("Ignoring sent packet: %s, "
"seq=%"PRIu32", ack_seq=%"PRIu32", " "seq=%"PRIu32", ack_seq=%"PRIu32", "
"rst=%d, window=%"PRIu16"\n", "rst=%d, window=%"PRIu16"\n",
ctdb_connection_to_string(state, &conn, false), ctdb_connection_to_string(state, &conn, false),
seq, ack_seq, rst, ntohs(window)); seq, ack_seq, rst, ntohs(window));
return; return;
} }