84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
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#define BPF_SOCK_ADDR_STORE(field, off, res, err, flgs) \
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{ \
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"wide store to bpf_sock_addr." #field "[" #off "]", \
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.insns = { \
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BPF_MOV64_IMM(BPF_REG_0, 1), \
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BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, \
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offsetof(struct bpf_sock_addr, field[off])), \
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BPF_EXIT_INSN(), \
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}, \
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.result = res, \
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.prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR, \
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.expected_attach_type = BPF_CGROUP_UDP6_SENDMSG, \
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.errstr = err, \
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.flags = flgs, \
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}
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/* user_ip6[0] is u64 aligned */
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BPF_SOCK_ADDR_STORE(user_ip6, 0, ACCEPT,
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NULL, 0),
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BPF_SOCK_ADDR_STORE(user_ip6, 1, REJECT,
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"invalid bpf_context access off=12 size=8",
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F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),
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BPF_SOCK_ADDR_STORE(user_ip6, 2, ACCEPT,
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NULL, 0),
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BPF_SOCK_ADDR_STORE(user_ip6, 3, REJECT,
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"invalid bpf_context access off=20 size=8",
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F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),
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/* msg_src_ip6[0] is _not_ u64 aligned */
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BPF_SOCK_ADDR_STORE(msg_src_ip6, 0, REJECT,
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"invalid bpf_context access off=44 size=8",
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F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),
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BPF_SOCK_ADDR_STORE(msg_src_ip6, 1, ACCEPT,
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NULL, 0),
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BPF_SOCK_ADDR_STORE(msg_src_ip6, 2, REJECT,
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"invalid bpf_context access off=52 size=8",
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F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),
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BPF_SOCK_ADDR_STORE(msg_src_ip6, 3, REJECT,
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"invalid bpf_context access off=56 size=8", 0),
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#undef BPF_SOCK_ADDR_STORE
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#define BPF_SOCK_ADDR_LOAD(field, off, res, err, flgs) \
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{ \
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"wide load from bpf_sock_addr." #field "[" #off "]", \
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.insns = { \
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BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, \
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offsetof(struct bpf_sock_addr, field[off])), \
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BPF_MOV64_IMM(BPF_REG_0, 1), \
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BPF_EXIT_INSN(), \
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}, \
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.result = res, \
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.prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR, \
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.expected_attach_type = BPF_CGROUP_UDP6_SENDMSG, \
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.errstr = err, \
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.flags = flgs, \
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}
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/* user_ip6[0] is u64 aligned */
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BPF_SOCK_ADDR_LOAD(user_ip6, 0, ACCEPT,
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NULL, 0),
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BPF_SOCK_ADDR_LOAD(user_ip6, 1, REJECT,
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"invalid bpf_context access off=12 size=8",
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F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),
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BPF_SOCK_ADDR_LOAD(user_ip6, 2, ACCEPT,
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NULL, 0),
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BPF_SOCK_ADDR_LOAD(user_ip6, 3, REJECT,
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"invalid bpf_context access off=20 size=8",
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F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),
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/* msg_src_ip6[0] is _not_ u64 aligned */
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BPF_SOCK_ADDR_LOAD(msg_src_ip6, 0, REJECT,
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"invalid bpf_context access off=44 size=8",
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F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),
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BPF_SOCK_ADDR_LOAD(msg_src_ip6, 1, ACCEPT,
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NULL, 0),
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BPF_SOCK_ADDR_LOAD(msg_src_ip6, 2, REJECT,
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"invalid bpf_context access off=52 size=8",
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F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),
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BPF_SOCK_ADDR_LOAD(msg_src_ip6, 3, REJECT,
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"invalid bpf_context access off=56 size=8", 0),
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#undef BPF_SOCK_ADDR_LOAD
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