| 1 | // SPDX-License-Identifier: GPL-2.0-only |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright 2022 Google LLC. |
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| 5 | */ |
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| 6 | |
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| 7 | #include <linux/bpf.h> |
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| 8 | #include <bpf/bpf_helpers.h> |
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| 9 | #include <bpf/bpf_endian.h> |
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| 10 | #include <netinet/in.h> |
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| 11 | #include <sys/socket.h> |
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| 12 | |
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| 13 | /* 2001:db8::1 */ |
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| 14 | #define BINDADDR_V6 { { { 0x20,0x01,0x0d,0xb8,0,0,0,0,0,0,0,0,0,0,0,1 } } } |
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| 15 | |
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| 16 | __u32 do_bind = 0; |
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| 17 | __u32 has_error = 0; |
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| 18 | __u32 invocations_v4 = 0; |
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| 19 | __u32 invocations_v6 = 0; |
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| 20 | |
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| 21 | SEC("cgroup/connect4" ) |
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| 22 | int connect_v4_prog(struct bpf_sock_addr *ctx) |
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| 23 | { |
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| 24 | struct sockaddr_in sa = { |
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| 25 | .sin_family = AF_INET, |
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| 26 | .sin_addr.s_addr = bpf_htonl(0x01010101), |
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| 27 | }; |
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| 28 | |
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| 29 | __sync_fetch_and_add(&invocations_v4, 1); |
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| 30 | |
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| 31 | if (do_bind && bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa))) |
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| 32 | has_error = 1; |
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| 33 | |
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| 34 | return 1; |
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| 35 | } |
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| 36 | |
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| 37 | SEC("cgroup/connect6" ) |
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| 38 | int connect_v6_prog(struct bpf_sock_addr *ctx) |
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| 39 | { |
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| 40 | struct sockaddr_in6 sa = { |
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| 41 | .sin6_family = AF_INET6, |
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| 42 | .sin6_addr = BINDADDR_V6, |
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| 43 | }; |
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| 44 | |
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| 45 | __sync_fetch_and_add(&invocations_v6, 1); |
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| 46 | |
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| 47 | if (do_bind && bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa))) |
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| 48 | has_error = 1; |
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| 49 | |
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| 50 | return 1; |
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| 51 | } |
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| 52 | |
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| 53 | char _license[] SEC("license" ) = "GPL" ; |
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| 54 | |
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