1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 2
3 #include <string.h> 3 #include <string.h>
4 4
5 #include <linux/stddef.h> 5 #include <linux/stddef.h>
6 #include <linux/bpf.h> 6 #include <linux/bpf.h>
7 7
8 #include <sys/socket.h> 8 #include <sys/socket.h>
9 9
10 #include <bpf/bpf_helpers.h> 10 #include <bpf/bpf_helpers.h>
11 #include <bpf/bpf_endian.h> 11 #include <bpf/bpf_endian.h>
12 12
13 #define VERDICT_REJECT 0 13 #define VERDICT_REJECT 0
14 #define VERDICT_PROCEED 1 14 #define VERDICT_PROCEED 1
15 15
16 SEC("cgroup/connect4") 16 SEC("cgroup/connect4")
17 int connect_v4_dropper(struct bpf_sock_addr *c 17 int connect_v4_dropper(struct bpf_sock_addr *ctx)
18 { 18 {
19 if (ctx->type != SOCK_STREAM) 19 if (ctx->type != SOCK_STREAM)
20 return VERDICT_PROCEED; 20 return VERDICT_PROCEED;
21 if (ctx->user_port == bpf_htons(60120) 21 if (ctx->user_port == bpf_htons(60120))
22 return VERDICT_REJECT; 22 return VERDICT_REJECT;
23 return VERDICT_PROCEED; 23 return VERDICT_PROCEED;
24 } 24 }
25 25
26 char _license[] SEC("license") = "GPL"; 26 char _license[] SEC("license") = "GPL";
27 27
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