1 /*-
2 * Copyright (c) 2013 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Mindaugas Rasiukevicius.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 /*
31 * NPF tests of BPF coprocessor.
32 */
33
34 #ifdef _KERNEL
35 #include <sys/types.h>
36 #include <sys/endian.h>
37 #endif
38
39 #define NPF_BPFCOP
40 #include "npf_impl.h"
41 #include "npf_test.h"
42
43 static bool lverbose = false;
44
45 static int
test_bpf_code(void * code,size_t size)46 test_bpf_code(void *code, size_t size)
47 {
48 uint32_t memstore[BPF_MEMWORDS];
49 bpf_args_t bc_args;
50 npf_cache_t *npc;
51 struct mbuf *m;
52 int ret, jret;
53 void *jcode;
54
55 /* Layer 3 (IP + TCP). */
56 m = mbuf_get_pkt(AF_INET, IPPROTO_TCP,
57 "192.168.2.100", "10.0.0.1", 15000, 80);
58 npc = get_cached_pkt(m, NULL);
59 #ifdef _NPF_STANDALONE
60 bc_args.pkt = (const uint8_t *)nbuf_dataptr(npc->npc_nbuf);
61 #else
62 bc_args.pkt = (const uint8_t *)m;
63 #endif
64 bc_args.buflen = m_length(m);
65 bc_args.wirelen = bc_args.buflen;
66 bc_args.mem = memstore;
67 bc_args.arg = npc;
68
69 ret = npf_bpf_filter(&bc_args, code, NULL);
70
71 /* JIT-compiled code. */
72 jcode = npf_bpf_compile(code, size);
73 if (jcode) {
74 jret = npf_bpf_filter(&bc_args, NULL, jcode);
75 assert(ret == jret); (void)jret;
76 bpf_jit_freecode(jcode);
77 } else if (lverbose) {
78 printf("JIT-compilation failed\n");
79 }
80 put_cached_pkt(npc);
81 return ret;
82 }
83
84 static uint32_t
npf_bpfcop_run(unsigned reg)85 npf_bpfcop_run(unsigned reg)
86 {
87 struct bpf_insn insns_npf_bpfcop[] = {
88 BPF_STMT(BPF_MISC+BPF_COP, NPF_COP_L3),
89 BPF_STMT(BPF_LD+BPF_W+BPF_MEM, reg),
90 BPF_STMT(BPF_RET+BPF_A, 0),
91 };
92 return test_bpf_code(&insns_npf_bpfcop, sizeof(insns_npf_bpfcop));
93 }
94
95 static bool
npf_bpfcop_test(void)96 npf_bpfcop_test(void)
97 {
98 /* A <- IP version (4 or 6) */
99 struct bpf_insn insns_ipver[] = {
100 BPF_STMT(BPF_MISC+BPF_COP, NPF_COP_L3),
101 BPF_STMT(BPF_RET+BPF_A, 0),
102 };
103 CHECK_TRUE(test_bpf_code(&insns_ipver, sizeof(insns_ipver)) == IPVERSION);
104
105 /* BPF_MW_IPVERI <- IP version */
106 CHECK_TRUE(npf_bpfcop_run(BPF_MW_IPVER) == IPVERSION);
107
108 /* BPF_MW_L4OFF <- L4 header offset */
109 CHECK_TRUE(npf_bpfcop_run(BPF_MW_L4OFF) == sizeof(struct ip));
110
111 /* BPF_MW_L4PROTO <- L4 protocol */
112 CHECK_TRUE(npf_bpfcop_run(BPF_MW_L4PROTO) == IPPROTO_TCP);
113
114 return true;
115 }
116
117 bool
npf_bpf_test(bool verbose)118 npf_bpf_test(bool verbose)
119 {
120 lverbose = verbose;
121 return npf_bpfcop_test();
122 }
123