84 lines · c
1#define BPF_SOCK_ADDR_STORE(field, off, res, err, flgs) \2{ \3 "wide store to bpf_sock_addr." #field "[" #off "]", \4 .insns = { \5 BPF_MOV64_IMM(BPF_REG_0, 1), \6 BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, \7 offsetof(struct bpf_sock_addr, field[off])), \8 BPF_EXIT_INSN(), \9 }, \10 .result = res, \11 .prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR, \12 .expected_attach_type = BPF_CGROUP_UDP6_SENDMSG, \13 .errstr = err, \14 .flags = flgs, \15}16 17/* user_ip6[0] is u64 aligned */18BPF_SOCK_ADDR_STORE(user_ip6, 0, ACCEPT,19 NULL, 0),20BPF_SOCK_ADDR_STORE(user_ip6, 1, REJECT,21 "invalid bpf_context access off=12 size=8",22 F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),23BPF_SOCK_ADDR_STORE(user_ip6, 2, ACCEPT,24 NULL, 0),25BPF_SOCK_ADDR_STORE(user_ip6, 3, REJECT,26 "invalid bpf_context access off=20 size=8",27 F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),28 29/* msg_src_ip6[0] is _not_ u64 aligned */30BPF_SOCK_ADDR_STORE(msg_src_ip6, 0, REJECT,31 "invalid bpf_context access off=44 size=8",32 F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),33BPF_SOCK_ADDR_STORE(msg_src_ip6, 1, ACCEPT,34 NULL, 0),35BPF_SOCK_ADDR_STORE(msg_src_ip6, 2, REJECT,36 "invalid bpf_context access off=52 size=8",37 F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),38BPF_SOCK_ADDR_STORE(msg_src_ip6, 3, REJECT,39 "invalid bpf_context access off=56 size=8", 0),40 41#undef BPF_SOCK_ADDR_STORE42 43#define BPF_SOCK_ADDR_LOAD(field, off, res, err, flgs) \44{ \45 "wide load from bpf_sock_addr." #field "[" #off "]", \46 .insns = { \47 BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, \48 offsetof(struct bpf_sock_addr, field[off])), \49 BPF_MOV64_IMM(BPF_REG_0, 1), \50 BPF_EXIT_INSN(), \51 }, \52 .result = res, \53 .prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR, \54 .expected_attach_type = BPF_CGROUP_UDP6_SENDMSG, \55 .errstr = err, \56 .flags = flgs, \57}58 59/* user_ip6[0] is u64 aligned */60BPF_SOCK_ADDR_LOAD(user_ip6, 0, ACCEPT,61 NULL, 0),62BPF_SOCK_ADDR_LOAD(user_ip6, 1, REJECT,63 "invalid bpf_context access off=12 size=8",64 F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),65BPF_SOCK_ADDR_LOAD(user_ip6, 2, ACCEPT,66 NULL, 0),67BPF_SOCK_ADDR_LOAD(user_ip6, 3, REJECT,68 "invalid bpf_context access off=20 size=8",69 F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),70 71/* msg_src_ip6[0] is _not_ u64 aligned */72BPF_SOCK_ADDR_LOAD(msg_src_ip6, 0, REJECT,73 "invalid bpf_context access off=44 size=8",74 F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),75BPF_SOCK_ADDR_LOAD(msg_src_ip6, 1, ACCEPT,76 NULL, 0),77BPF_SOCK_ADDR_LOAD(msg_src_ip6, 2, REJECT,78 "invalid bpf_context access off=52 size=8",79 F_NEEDS_EFFICIENT_UNALIGNED_ACCESS),80BPF_SOCK_ADDR_LOAD(msg_src_ip6, 3, REJECT,81 "invalid bpf_context access off=56 size=8", 0),82 83#undef BPF_SOCK_ADDR_LOAD84