1// SPDX-License-Identifier: GPL-2.0
 2
 3#include <linux/stddef.h>
 4#include <linux/bpf.h>
 5#include <linux/in6.h>
 6#include <sys/socket.h>
 7
 8#include <bpf/bpf_helpers.h>
 9#include <bpf/bpf_endian.h>
10
11#include <bpf_sockopt_helpers.h>
12
13#define SERV6_IP_0		0xfaceb00c /* face:b00c:1234:5678::abcd */
14#define SERV6_IP_1		0x12345678
15#define SERV6_IP_2		0x00000000
16#define SERV6_IP_3		0x0000abcd
17#define SERV6_PORT		6060
18
19SEC("cgroup/recvmsg6")
20int recvmsg6_prog(struct bpf_sock_addr *ctx)
21{
22	struct bpf_sock *sk;
 
 
23
24	sk = ctx->sk;
25	if (!sk)
26		return 1;
27
28	if (sk->family != AF_INET6)
29		return 1;
30
31	if (ctx->type != SOCK_STREAM && ctx->type != SOCK_DGRAM)
32		return 1;
33
34	if (!get_set_sk_priority(ctx))
35		return 1;
36
37	ctx->user_ip6[0] = bpf_htonl(SERV6_IP_0);
38	ctx->user_ip6[1] = bpf_htonl(SERV6_IP_1);
39	ctx->user_ip6[2] = bpf_htonl(SERV6_IP_2);
40	ctx->user_ip6[3] = bpf_htonl(SERV6_IP_3);
41	ctx->user_port = bpf_htons(SERV6_PORT);
42
43	return 1;
44}
45
46char _license[] SEC("license") = "GPL";

 1// SPDX-License-Identifier: GPL-2.0
 2
 3#include <linux/stddef.h>
 4#include <linux/bpf.h>
 5#include <linux/in6.h>
 6#include <sys/socket.h>
 7
 8#include <bpf/bpf_helpers.h>
 9#include <bpf/bpf_endian.h>
10
11#include <bpf_sockopt_helpers.h>
12
13#define SERV6_IP_0		0xfaceb00c /* face:b00c:1234:5678::abcd */
14#define SERV6_IP_1		0x12345678
15#define SERV6_IP_2		0x00000000
16#define SERV6_IP_3		0x0000abcd
17#define SERV6_PORT		6060
18
19SEC("cgroup/recvmsg6")
20int recvmsg6_prog(struct bpf_sock_addr *ctx)
21{
22	struct bpf_sock *sk;
23	__u32 user_ip4;
24	__u16 user_port;
25
26	sk = ctx->sk;
27	if (!sk)
28		return 1;
29
30	if (sk->family != AF_INET6)
31		return 1;
32
33	if (ctx->type != SOCK_STREAM && ctx->type != SOCK_DGRAM)
34		return 1;
35
36	if (!get_set_sk_priority(ctx))
37		return 1;
38
39	ctx->user_ip6[0] = bpf_htonl(SERV6_IP_0);
40	ctx->user_ip6[1] = bpf_htonl(SERV6_IP_1);
41	ctx->user_ip6[2] = bpf_htonl(SERV6_IP_2);
42	ctx->user_ip6[3] = bpf_htonl(SERV6_IP_3);
43	ctx->user_port = bpf_htons(SERV6_PORT);
44
45	return 1;
46}
47
48char _license[] SEC("license") = "GPL";