1// SPDX-License-Identifier: GPL-2.0
  2#include <stddef.h>
  3#include <string.h>
  4#include <linux/bpf.h>
  5#include <linux/if_ether.h>
  6#include <linux/if_packet.h>
  7#include <linux/ip.h>
  8#include <linux/types.h>
  9#include <linux/socket.h>
 10#include <linux/tcp.h>
 11#include <netinet/in.h>
 12#include "bpf_helpers.h"
 13#include "bpf_endian.h"
 14#include "test_tcpbpf.h"
 15
 16struct bpf_map_def SEC("maps") global_map = {
 17	.type = BPF_MAP_TYPE_ARRAY,
 18	.key_size = sizeof(__u32),
 19	.value_size = sizeof(struct tcpbpf_globals),
 20	.max_entries = 2,
 21};
 22
 23static inline void update_event_map(int event)
 24{
 25	__u32 key = 0;
 26	struct tcpbpf_globals g, *gp;
 27
 28	gp = bpf_map_lookup_elem(&global_map, &key);
 29	if (gp == NULL) {
 30		struct tcpbpf_globals g = {0};
 31
 32		g.event_map |= (1 << event);
 33		bpf_map_update_elem(&global_map, &key, &g,
 34			    BPF_ANY);
 35	} else {
 36		g = *gp;
 37		g.event_map |= (1 << event);
 38		bpf_map_update_elem(&global_map, &key, &g,
 39			    BPF_ANY);
 40	}
 41}
 42
 43int _version SEC("version") = 1;
 44
 45SEC("sockops")
 46int bpf_testcb(struct bpf_sock_ops *skops)
 47{
 48	int rv = -1;
 49	int bad_call_rv = 0;
 50	int good_call_rv = 0;
 51	int op;
 52	int v = 0;
 53
 54	op = (int) skops->op;
 55
 56	update_event_map(op);
 57
 58	switch (op) {
 59	case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB:
 60		/* Test failure to set largest cb flag (assumes not defined) */
 61		bad_call_rv = bpf_sock_ops_cb_flags_set(skops, 0x80);
 62		/* Set callback */
 63		good_call_rv = bpf_sock_ops_cb_flags_set(skops,
 64						 BPF_SOCK_OPS_STATE_CB_FLAG);
 65		/* Update results */
 66		{
 67			__u32 key = 0;
 68			struct tcpbpf_globals g, *gp;
 69
 70			gp = bpf_map_lookup_elem(&global_map, &key);
 71			if (!gp)
 72				break;
 73			g = *gp;
 74			g.bad_cb_test_rv = bad_call_rv;
 75			g.good_cb_test_rv = good_call_rv;
 76			bpf_map_update_elem(&global_map, &key, &g,
 77					    BPF_ANY);
 78		}
 79		break;
 80	case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB:
 81		skops->sk_txhash = 0x12345f;
 82		v = 0xff;
 83		rv = bpf_setsockopt(skops, SOL_IPV6, IPV6_TCLASS, &v,
 84				    sizeof(v));
 85		break;
 86	case BPF_SOCK_OPS_RTO_CB:
 87		break;
 88	case BPF_SOCK_OPS_RETRANS_CB:
 89		break;
 90	case BPF_SOCK_OPS_STATE_CB:
 91		if (skops->args[1] == BPF_TCP_CLOSE) {
 92			__u32 key = 0;
 93			struct tcpbpf_globals g, *gp;
 94
 95			gp = bpf_map_lookup_elem(&global_map, &key);
 96			if (!gp)
 97				break;
 98			g = *gp;
 99			g.total_retrans = skops->total_retrans;
100			g.data_segs_in = skops->data_segs_in;
101			g.data_segs_out = skops->data_segs_out;
102			g.bytes_received = skops->bytes_received;
103			g.bytes_acked = skops->bytes_acked;
104			bpf_map_update_elem(&global_map, &key, &g,
105					    BPF_ANY);
106		}
107		break;
108	default:
109		rv = -1;
110	}
111	skops->reply = rv;
112	return 1;
113}
114char _license[] SEC("license") = "GPL";