linux/tools/testing/selftests/bpf/test_tcpnotify.h

// SPDX-License-Identifier: GPL-2.0

#ifndef _TEST_TCPBPF_H
#define _TEST_TCPBPF_H

struct tcpnotify_globals {
	__u32 total_retrans;
	__u32 ncalls;
};

struct tcp_notifier {
	__u8    type;
	__u8    subtype;
	__u8    source;
	__u8    hash;
};

#define	TESTPORT	12877
#endif
selftests/bpf: add a test case for sock_ops perf-event notification This patch provides a tcp_bpf based eBPF sample. The test - ncat(1) as the TCP client program to connect() to a port with the intention of triggerring SYN retransmissions: we first install an iptables DROP rule to make sure ncat SYNs are resent (instead of aborting instantly after a TCP RST) - has a bpf kernel module that sends a perf-event notification for each TCP retransmit, and also tracks the number of such notifications sent in the global_map The test passes when the number of event notifications intercepted in user-space matches the value in the global_map. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> 2018-11-08 08:12:02 +08:00			`// SPDX-License-Identifier: GPL-2.0`

			`#ifndef _TEST_TCPBPF_H`
			`#define _TEST_TCPBPF_H`

			`struct tcpnotify_globals {`
			`__u32 total_retrans;`
			`__u32 ncalls;`
			`};`

			`struct tcp_notifier {`
			`__u8 type;`
			`__u8 subtype;`
			`__u8 source;`
			`__u8 hash;`
			`};`

			`#define TESTPORT 12877`
			`#endif`