1 // SPDX-License-Identifier: GPL-2.0 2 #include <test_progs.h> 3 4 #define CHECK_FLOW_KEYS(desc, got, expected) \ 5 CHECK(memcmp(&got, &expected, sizeof(got)) != 0, \ 6 desc, \ 7 "nhoff=%u/%u " \ 8 "thoff=%u/%u " \ 9 "addr_proto=0x%x/0x%x " \ 10 "is_frag=%u/%u " \ 11 "is_first_frag=%u/%u " \ 12 "is_encap=%u/%u " \ 13 "n_proto=0x%x/0x%x " \ 14 "sport=%u/%u " \ 15 "dport=%u/%u\n", \ 16 got.nhoff, expected.nhoff, \ 17 got.thoff, expected.thoff, \ 18 got.addr_proto, expected.addr_proto, \ 19 got.is_frag, expected.is_frag, \ 20 got.is_first_frag, expected.is_first_frag, \ 21 got.is_encap, expected.is_encap, \ 22 got.n_proto, expected.n_proto, \ 23 got.sport, expected.sport, \ 24 got.dport, expected.dport) 25 26 static struct bpf_flow_keys pkt_v4_flow_keys = { 27 .nhoff = 0, 28 .thoff = sizeof(struct iphdr), 29 .addr_proto = ETH_P_IP, 30 .ip_proto = IPPROTO_TCP, 31 .n_proto = __bpf_constant_htons(ETH_P_IP), 32 }; 33 34 static struct bpf_flow_keys pkt_v6_flow_keys = { 35 .nhoff = 0, 36 .thoff = sizeof(struct ipv6hdr), 37 .addr_proto = ETH_P_IPV6, 38 .ip_proto = IPPROTO_TCP, 39 .n_proto = __bpf_constant_htons(ETH_P_IPV6), 40 }; 41 42 void test_flow_dissector(void) 43 { 44 struct bpf_flow_keys flow_keys; 45 struct bpf_object *obj; 46 __u32 duration, retval; 47 int err, prog_fd; 48 __u32 size; 49 50 err = bpf_flow_load(&obj, "./bpf_flow.o", "flow_dissector", 51 "jmp_table", &prog_fd); 52 if (err) { 53 error_cnt++; 54 return; 55 } 56 57 err = bpf_prog_test_run(prog_fd, 10, &pkt_v4, sizeof(pkt_v4), 58 &flow_keys, &size, &retval, &duration); 59 CHECK(size != sizeof(flow_keys) || err || retval != 1, "ipv4", 60 "err %d errno %d retval %d duration %d size %u/%lu\n", 61 err, errno, retval, duration, size, sizeof(flow_keys)); 62 CHECK_FLOW_KEYS("ipv4_flow_keys", flow_keys, pkt_v4_flow_keys); 63 64 err = bpf_prog_test_run(prog_fd, 10, &pkt_v6, sizeof(pkt_v6), 65 &flow_keys, &size, &retval, &duration); 66 CHECK(size != sizeof(flow_keys) || err || retval != 1, "ipv6", 67 "err %d errno %d retval %d duration %d size %u/%lu\n", 68 err, errno, retval, duration, size, sizeof(flow_keys)); 69 CHECK_FLOW_KEYS("ipv6_flow_keys", flow_keys, pkt_v6_flow_keys); 70 71 bpf_object__close(obj); 72 } 73