1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/if_ether.h>
6 #include <linux/if_packet.h>
8 #include <linux/ipv6.h>
9 #include <linux/types.h>
10 #include <linux/socket.h>
11 #include <linux/tcp.h>
12 #include <netinet/in.h>
13 #include "bpf_helpers.h"
14 #include "bpf_endian.h"
15 #include "test_tcpnotify.h"
17 struct bpf_map_def SEC("maps") global_map = {
18 .type = BPF_MAP_TYPE_ARRAY,
19 .key_size = sizeof(__u32),
20 .value_size = sizeof(struct tcpnotify_globals),
24 struct bpf_map_def SEC("maps") perf_event_map = {
25 .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
26 .key_size = sizeof(int),
27 .value_size = sizeof(__u32),
31 int _version SEC("version") = 1;
34 int bpf_testcb(struct bpf_sock_ops *skops)
41 if (bpf_ntohl(skops->remote_port) != TESTPORT) {
47 case BPF_SOCK_OPS_TIMEOUT_INIT:
48 case BPF_SOCK_OPS_RWND_INIT:
49 case BPF_SOCK_OPS_NEEDS_ECN:
50 case BPF_SOCK_OPS_BASE_RTT:
51 case BPF_SOCK_OPS_RTO_CB:
55 case BPF_SOCK_OPS_TCP_CONNECT_CB:
56 case BPF_SOCK_OPS_TCP_LISTEN_CB:
57 case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB:
58 case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB:
59 bpf_sock_ops_cb_flags_set(skops, (BPF_SOCK_OPS_RETRANS_CB_FLAG|
60 BPF_SOCK_OPS_RTO_CB_FLAG));
63 case BPF_SOCK_OPS_RETRANS_CB: {
65 struct tcpnotify_globals g, *gp;
66 struct tcp_notifier msg = {
76 gp = bpf_map_lookup_elem(&global_map, &key);
80 g.total_retrans = skops->total_retrans;
82 bpf_map_update_elem(&global_map, &key, &g,
84 bpf_perf_event_output(skops, &perf_event_map,
95 char _license[] SEC("license") = "GPL";