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test_bpf.c
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/*
* Testsuite for BPF interpreter and BPF JIT compiler
*
* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/module.h>
#include <linux/filter.h>
#include <linux/bpf.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <linux/random.h>
#include <linux/highmem.h>
/* General test specific settings */
#define MAX_SUBTESTS 3
#define MAX_TESTRUNS 10000
#define MAX_DATA 128
#define MAX_INSNS 512
#define MAX_K 0xffffFFFF
/* Few constants used to init test 'skb' */
#define SKB_TYPE 3
#define SKB_MARK 0x1234aaaa
#define SKB_HASH 0x1234aaab
#define SKB_QUEUE_MAP 123
#define SKB_VLAN_TCI 0xffff
#define SKB_DEV_IFINDEX 577
#define SKB_DEV_TYPE 588
/* Redefine REGs to make tests less verbose */
#define R0 BPF_REG_0
#define R1 BPF_REG_1
#define R2 BPF_REG_2
#define R3 BPF_REG_3
#define R4 BPF_REG_4
#define R5 BPF_REG_5
#define R6 BPF_REG_6
#define R7 BPF_REG_7
#define R8 BPF_REG_8
#define R9 BPF_REG_9
#define R10 BPF_REG_10
/* Flags that can be passed to test cases */
#define FLAG_NO_DATA BIT(0)
#define FLAG_EXPECTED_FAIL BIT(1)
#define FLAG_SKB_FRAG BIT(2)
enum {
CLASSIC = BIT(6), /* Old BPF instructions only. */
INTERNAL = BIT(7), /* Extended instruction set. */
};
#define TEST_TYPE_MASK (CLASSIC | INTERNAL)
struct bpf_test {
const char *descr;
union {
struct sock_filter insns[MAX_INSNS];
struct bpf_insn insns_int[MAX_INSNS];
struct {
void *insns;
unsigned int len;
} ptr;
} u;
__u8 aux;
__u8 data[MAX_DATA];
struct {
int data_size;
__u32 result;
} test[MAX_SUBTESTS];
int (*fill_helper)(struct bpf_test *self);
int expected_errcode; /* used when FLAG_EXPECTED_FAIL is set in the aux */
__u8 frag_data[MAX_DATA];
};
/* Large test cases need separate allocation and fill handler. */
static int bpf_fill_maxinsns1(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS;
struct sock_filter *insn;
__u32 k = ~0;
int i;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
for (i = 0; i < len; i++, k--)
insn[i] = __BPF_STMT(BPF_RET | BPF_K, k);
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int bpf_fill_maxinsns2(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS;
struct sock_filter *insn;
int i;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
for (i = 0; i < len; i++)
insn[i] = __BPF_STMT(BPF_RET | BPF_K, 0xfefefefe);
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int bpf_fill_maxinsns3(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS;
struct sock_filter *insn;
struct rnd_state rnd;
int i;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
prandom_seed_state(&rnd, 3141592653589793238ULL);
for (i = 0; i < len - 1; i++) {
__u32 k = prandom_u32_state(&rnd);
insn[i] = __BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, k);
}
insn[len - 1] = __BPF_STMT(BPF_RET | BPF_A, 0);
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int bpf_fill_maxinsns4(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS + 1;
struct sock_filter *insn;
int i;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
for (i = 0; i < len; i++)
insn[i] = __BPF_STMT(BPF_RET | BPF_K, 0xfefefefe);
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int bpf_fill_maxinsns5(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS;
struct sock_filter *insn;
int i;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
insn[0] = __BPF_JUMP(BPF_JMP | BPF_JA, len - 2, 0, 0);
for (i = 1; i < len - 1; i++)
insn[i] = __BPF_STMT(BPF_RET | BPF_K, 0xfefefefe);
insn[len - 1] = __BPF_STMT(BPF_RET | BPF_K, 0xabababab);
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int bpf_fill_maxinsns6(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS;
struct sock_filter *insn;
int i;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
for (i = 0; i < len - 1; i++)
insn[i] = __BPF_STMT(BPF_LD | BPF_W | BPF_ABS, SKF_AD_OFF +
SKF_AD_VLAN_TAG_PRESENT);
insn[len - 1] = __BPF_STMT(BPF_RET | BPF_A, 0);
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int bpf_fill_maxinsns7(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS;
struct sock_filter *insn;
int i;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
for (i = 0; i < len - 4; i++)
insn[i] = __BPF_STMT(BPF_LD | BPF_W | BPF_ABS, SKF_AD_OFF +
SKF_AD_CPU);
insn[len - 4] = __BPF_STMT(BPF_MISC | BPF_TAX, 0);
insn[len - 3] = __BPF_STMT(BPF_LD | BPF_W | BPF_ABS, SKF_AD_OFF +
SKF_AD_CPU);
insn[len - 2] = __BPF_STMT(BPF_ALU | BPF_SUB | BPF_X, 0);
insn[len - 1] = __BPF_STMT(BPF_RET | BPF_A, 0);
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int bpf_fill_maxinsns8(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS;
struct sock_filter *insn;
int i, jmp_off = len - 3;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
insn[0] = __BPF_STMT(BPF_LD | BPF_IMM, 0xffffffff);
for (i = 1; i < len - 1; i++)
insn[i] = __BPF_JUMP(BPF_JMP | BPF_JGT, 0xffffffff, jmp_off--, 0);
insn[len - 1] = __BPF_STMT(BPF_RET | BPF_A, 0);
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int bpf_fill_maxinsns9(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS;
struct bpf_insn *insn;
int i;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
insn[0] = BPF_JMP_IMM(BPF_JA, 0, 0, len - 2);
insn[1] = BPF_ALU32_IMM(BPF_MOV, R0, 0xcbababab);
insn[2] = BPF_EXIT_INSN();
for (i = 3; i < len - 2; i++)
insn[i] = BPF_ALU32_IMM(BPF_MOV, R0, 0xfefefefe);
insn[len - 2] = BPF_EXIT_INSN();
insn[len - 1] = BPF_JMP_IMM(BPF_JA, 0, 0, -(len - 1));
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int bpf_fill_maxinsns10(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS, hlen = len - 2;
struct bpf_insn *insn;
int i;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
for (i = 0; i < hlen / 2; i++)
insn[i] = BPF_JMP_IMM(BPF_JA, 0, 0, hlen - 2 - 2 * i);
for (i = hlen - 1; i > hlen / 2; i--)
insn[i] = BPF_JMP_IMM(BPF_JA, 0, 0, hlen - 1 - 2 * i);
insn[hlen / 2] = BPF_JMP_IMM(BPF_JA, 0, 0, hlen / 2 - 1);
insn[hlen] = BPF_ALU32_IMM(BPF_MOV, R0, 0xabababac);
insn[hlen + 1] = BPF_EXIT_INSN();
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int __bpf_fill_ja(struct bpf_test *self, unsigned int len,
unsigned int plen)
{
struct sock_filter *insn;
unsigned int rlen;
int i, j;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
rlen = (len % plen) - 1;
for (i = 0; i + plen < len; i += plen)
for (j = 0; j < plen; j++)
insn[i + j] = __BPF_JUMP(BPF_JMP | BPF_JA,
plen - 1 - j, 0, 0);
for (j = 0; j < rlen; j++)
insn[i + j] = __BPF_JUMP(BPF_JMP | BPF_JA, rlen - 1 - j,
0, 0);
insn[len - 1] = __BPF_STMT(BPF_RET | BPF_K, 0xababcbac);
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static int bpf_fill_maxinsns11(struct bpf_test *self)
{
/* Hits 70 passes on x86_64, so cannot get JITed there. */
return __bpf_fill_ja(self, BPF_MAXINSNS, 68);
}
static int bpf_fill_ja(struct bpf_test *self)
{
/* Hits exactly 11 passes on x86_64 JIT. */
return __bpf_fill_ja(self, 12, 9);
}
static int bpf_fill_ld_abs_get_processor_id(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS;
struct sock_filter *insn;
int i;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
for (i = 0; i < len - 1; i += 2) {
insn[i] = __BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 0);
insn[i + 1] = __BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_CPU);
}
insn[len - 1] = __BPF_STMT(BPF_RET | BPF_K, 0xbee);
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
#define PUSH_CNT 68
/* test: {skb->data[0], vlan_push} x 68 + {skb->data[0], vlan_pop} x 68 */
static int bpf_fill_ld_abs_vlan_push_pop(struct bpf_test *self)
{
unsigned int len = BPF_MAXINSNS;
struct bpf_insn *insn;
int i = 0, j, k = 0;
insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL);
if (!insn)
return -ENOMEM;
insn[i++] = BPF_MOV64_REG(R6, R1);
loop:
for (j = 0; j < PUSH_CNT; j++) {
insn[i++] = BPF_LD_ABS(BPF_B, 0);
insn[i] = BPF_JMP_IMM(BPF_JNE, R0, 0x34, len - i - 2);
i++;
insn[i++] = BPF_MOV64_REG(R1, R6);
insn[i++] = BPF_MOV64_IMM(R2, 1);
insn[i++] = BPF_MOV64_IMM(R3, 2);
insn[i++] = BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
bpf_skb_vlan_push_proto.func - __bpf_call_base);
insn[i] = BPF_JMP_IMM(BPF_JNE, R0, 0, len - i - 2);
i++;
}
for (j = 0; j < PUSH_CNT; j++) {
insn[i++] = BPF_LD_ABS(BPF_B, 0);
insn[i] = BPF_JMP_IMM(BPF_JNE, R0, 0x34, len - i - 2);
i++;
insn[i++] = BPF_MOV64_REG(R1, R6);
insn[i++] = BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
bpf_skb_vlan_pop_proto.func - __bpf_call_base);
insn[i] = BPF_JMP_IMM(BPF_JNE, R0, 0, len - i - 2);
i++;
}
if (++k < 5)
goto loop;
for (; i < len - 1; i++)
insn[i] = BPF_ALU32_IMM(BPF_MOV, R0, 0xbef);
insn[len - 1] = BPF_EXIT_INSN();
self->u.ptr.insns = insn;
self->u.ptr.len = len;
return 0;
}
static struct bpf_test tests[] = {
{
"TAX",
.u.insns = {
BPF_STMT(BPF_LD | BPF_IMM, 1),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_IMM, 2),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
BPF_STMT(BPF_ALU | BPF_NEG, 0), /* A == -3 */
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_LEN, 0),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
BPF_STMT(BPF_MISC | BPF_TAX, 0), /* X == len - 3 */
BPF_STMT(BPF_LD | BPF_B | BPF_IND, 1),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ 10, 20, 30, 40, 50 },
{ { 2, 10 }, { 3, 20 }, { 4, 30 } },
},
{
"TXA",
.u.insns = {
BPF_STMT(BPF_LDX | BPF_LEN, 0),
BPF_STMT(BPF_MISC | BPF_TXA, 0),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
BPF_STMT(BPF_RET | BPF_A, 0) /* A == len * 2 */
},
CLASSIC,
{ 10, 20, 30, 40, 50 },
{ { 1, 2 }, { 3, 6 }, { 4, 8 } },
},
{
"ADD_SUB_MUL_K",
.u.insns = {
BPF_STMT(BPF_LD | BPF_IMM, 1),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 2),
BPF_STMT(BPF_LDX | BPF_IMM, 3),
BPF_STMT(BPF_ALU | BPF_SUB | BPF_X, 0),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_K, 0xffffffff),
BPF_STMT(BPF_ALU | BPF_MUL | BPF_K, 3),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC | FLAG_NO_DATA,
{ },
{ { 0, 0xfffffffd } }
},
{
"DIV_MOD_KX",
.u.insns = {
BPF_STMT(BPF_LD | BPF_IMM, 8),
BPF_STMT(BPF_ALU | BPF_DIV | BPF_K, 2),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_IMM, 0xffffffff),
BPF_STMT(BPF_ALU | BPF_DIV | BPF_X, 0),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_IMM, 0xffffffff),
BPF_STMT(BPF_ALU | BPF_DIV | BPF_K, 0x70000000),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_IMM, 0xffffffff),
BPF_STMT(BPF_ALU | BPF_MOD | BPF_X, 0),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_IMM, 0xffffffff),
BPF_STMT(BPF_ALU | BPF_MOD | BPF_K, 0x70000000),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC | FLAG_NO_DATA,
{ },
{ { 0, 0x20000000 } }
},
{
"AND_OR_LSH_K",
.u.insns = {
BPF_STMT(BPF_LD | BPF_IMM, 0xff),
BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xf0),
BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 27),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_IMM, 0xf),
BPF_STMT(BPF_ALU | BPF_OR | BPF_K, 0xf0),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC | FLAG_NO_DATA,
{ },
{ { 0, 0x800000ff }, { 1, 0x800000ff } },
},
{
"LD_IMM_0",
.u.insns = {
BPF_STMT(BPF_LD | BPF_IMM, 0), /* ld #0 */
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 0),
BPF_STMT(BPF_RET | BPF_K, 1),
},
CLASSIC,
{ },
{ { 1, 1 } },
},
{
"LD_IND",
.u.insns = {
BPF_STMT(BPF_LDX | BPF_LEN, 0),
BPF_STMT(BPF_LD | BPF_H | BPF_IND, MAX_K),
BPF_STMT(BPF_RET | BPF_K, 1)
},
CLASSIC,
{ },
{ { 1, 0 }, { 10, 0 }, { 60, 0 } },
},
{
"LD_ABS",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS, 1000),
BPF_STMT(BPF_RET | BPF_K, 1)
},
CLASSIC,
{ },
{ { 1, 0 }, { 10, 0 }, { 60, 0 } },
},
{
"LD_ABS_LL",
.u.insns = {
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, SKF_LL_OFF),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, SKF_LL_OFF + 1),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ 1, 2, 3 },
{ { 1, 0 }, { 2, 3 } },
},
{
"LD_IND_LL",
.u.insns = {
BPF_STMT(BPF_LD | BPF_IMM, SKF_LL_OFF - 1),
BPF_STMT(BPF_LDX | BPF_LEN, 0),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ 1, 2, 3, 0xff },
{ { 1, 1 }, { 3, 3 }, { 4, 0xff } },
},
{
"LD_ABS_NET",
.u.insns = {
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, SKF_NET_OFF),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, SKF_NET_OFF + 1),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3 },
{ { 15, 0 }, { 16, 3 } },
},
{
"LD_IND_NET",
.u.insns = {
BPF_STMT(BPF_LD | BPF_IMM, SKF_NET_OFF - 15),
BPF_STMT(BPF_LDX | BPF_LEN, 0),
BPF_STMT(BPF_ALU | BPF_ADD | BPF_X, 0),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_B | BPF_IND, 0),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3 },
{ { 14, 0 }, { 15, 1 }, { 17, 3 } },
},
{
"LD_PKTTYPE",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_PKTTYPE),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, SKB_TYPE, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 1),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_PKTTYPE),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, SKB_TYPE, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 1),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_PKTTYPE),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, SKB_TYPE, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 1),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{ { 1, 3 }, { 10, 3 } },
},
{
"LD_MARK",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_MARK),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{ { 1, SKB_MARK}, { 10, SKB_MARK} },
},
{
"LD_RXHASH",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_RXHASH),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{ { 1, SKB_HASH}, { 10, SKB_HASH} },
},
{
"LD_QUEUE",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_QUEUE),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{ { 1, SKB_QUEUE_MAP }, { 10, SKB_QUEUE_MAP } },
},
{
"LD_PROTOCOL",
.u.insns = {
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 1),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 20, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 0),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_PROTOCOL),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 30, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 0),
BPF_STMT(BPF_MISC | BPF_TXA, 0),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ 10, 20, 30 },
{ { 10, ETH_P_IP }, { 100, ETH_P_IP } },
},
{
"LD_VLAN_TAG",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_VLAN_TAG),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{
{ 1, SKB_VLAN_TCI & ~VLAN_TAG_PRESENT },
{ 10, SKB_VLAN_TCI & ~VLAN_TAG_PRESENT }
},
},
{
"LD_VLAN_TAG_PRESENT",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_VLAN_TAG_PRESENT),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{
{ 1, !!(SKB_VLAN_TCI & VLAN_TAG_PRESENT) },
{ 10, !!(SKB_VLAN_TCI & VLAN_TAG_PRESENT) }
},
},
{
"LD_IFINDEX",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_IFINDEX),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{ { 1, SKB_DEV_IFINDEX }, { 10, SKB_DEV_IFINDEX } },
},
{
"LD_HATYPE",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_HATYPE),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{ { 1, SKB_DEV_TYPE }, { 10, SKB_DEV_TYPE } },
},
{
"LD_CPU",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_CPU),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_CPU),
BPF_STMT(BPF_ALU | BPF_SUB | BPF_X, 0),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{ { 1, 0 }, { 10, 0 } },
},
{
"LD_NLATTR",
.u.insns = {
BPF_STMT(BPF_LDX | BPF_IMM, 2),
BPF_STMT(BPF_MISC | BPF_TXA, 0),
BPF_STMT(BPF_LDX | BPF_IMM, 3),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_NLATTR),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
#ifdef __BIG_ENDIAN
{ 0xff, 0xff, 0, 4, 0, 2, 0, 4, 0, 3 },
#else
{ 0xff, 0xff, 4, 0, 2, 0, 4, 0, 3, 0 },
#endif
{ { 4, 0 }, { 20, 6 } },
},
{
"LD_NLATTR_NEST",
.u.insns = {
BPF_STMT(BPF_LD | BPF_IMM, 2),
BPF_STMT(BPF_LDX | BPF_IMM, 3),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_NLATTR_NEST),
BPF_STMT(BPF_LD | BPF_IMM, 2),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_NLATTR_NEST),
BPF_STMT(BPF_LD | BPF_IMM, 2),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_NLATTR_NEST),
BPF_STMT(BPF_LD | BPF_IMM, 2),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_NLATTR_NEST),
BPF_STMT(BPF_LD | BPF_IMM, 2),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_NLATTR_NEST),
BPF_STMT(BPF_LD | BPF_IMM, 2),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_NLATTR_NEST),
BPF_STMT(BPF_LD | BPF_IMM, 2),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_NLATTR_NEST),
BPF_STMT(BPF_LD | BPF_IMM, 2),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_NLATTR_NEST),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
#ifdef __BIG_ENDIAN
{ 0xff, 0xff, 0, 12, 0, 1, 0, 4, 0, 2, 0, 4, 0, 3 },
#else
{ 0xff, 0xff, 12, 0, 1, 0, 4, 0, 2, 0, 4, 0, 3, 0 },
#endif
{ { 4, 0 }, { 20, 10 } },
},
{
"LD_PAYLOAD_OFF",
.u.insns = {
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_PAY_OFFSET),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_PAY_OFFSET),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_PAY_OFFSET),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_PAY_OFFSET),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_PAY_OFFSET),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
/* 00:00:00:00:00:00 > 00:00:00:00:00:00, ethtype IPv4 (0x0800),
* length 98: 127.0.0.1 > 127.0.0.1: ICMP echo request,
* id 9737, seq 1, length 64
*/
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x08, 0x00,
0x45, 0x00, 0x00, 0x54, 0xac, 0x8b, 0x40, 0x00, 0x40,
0x01, 0x90, 0x1b, 0x7f, 0x00, 0x00, 0x01 },
{ { 30, 0 }, { 100, 42 } },
},
{
"LD_ANC_XOR",
.u.insns = {
BPF_STMT(BPF_LD | BPF_IMM, 10),
BPF_STMT(BPF_LDX | BPF_IMM, 300),
BPF_STMT(BPF_LD | BPF_W | BPF_ABS,
SKF_AD_OFF + SKF_AD_ALU_XOR_X),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{ { 4, 10 ^ 300 }, { 20, 10 ^ 300 } },
},
{
"SPILL_FILL",
.u.insns = {
BPF_STMT(BPF_LDX | BPF_LEN, 0),
BPF_STMT(BPF_LD | BPF_IMM, 2),
BPF_STMT(BPF_ALU | BPF_RSH, 1),
BPF_STMT(BPF_ALU | BPF_XOR | BPF_X, 0),
BPF_STMT(BPF_ST, 1), /* M1 = 1 ^ len */
BPF_STMT(BPF_ALU | BPF_XOR | BPF_K, 0x80000000),
BPF_STMT(BPF_ST, 2), /* M2 = 1 ^ len ^ 0x80000000 */
BPF_STMT(BPF_STX, 15), /* M3 = len */
BPF_STMT(BPF_LDX | BPF_MEM, 1),
BPF_STMT(BPF_LD | BPF_MEM, 2),
BPF_STMT(BPF_ALU | BPF_XOR | BPF_X, 0),
BPF_STMT(BPF_LDX | BPF_MEM, 15),
BPF_STMT(BPF_ALU | BPF_XOR | BPF_X, 0),
BPF_STMT(BPF_RET | BPF_A, 0)
},
CLASSIC,
{ },
{ { 1, 0x80000001 }, { 2, 0x80000002 }, { 60, 0x80000000 ^ 60 } }
},
{
"JEQ",
.u.insns = {
BPF_STMT(BPF_LDX | BPF_LEN, 0),
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, 0, 1),
BPF_STMT(BPF_RET | BPF_K, 1),
BPF_STMT(BPF_RET | BPF_K, MAX_K)
},
CLASSIC,
{ 3, 3, 3, 3, 3 },
{ { 1, 0 }, { 3, 1 }, { 4, MAX_K } },
},
{
"JGT",
.u.insns = {
BPF_STMT(BPF_LDX | BPF_LEN, 0),
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 2),
BPF_JUMP(BPF_JMP | BPF_JGT | BPF_X, 0, 0, 1),
BPF_STMT(BPF_RET | BPF_K, 1),
BPF_STMT(BPF_RET | BPF_K, MAX_K)
},
CLASSIC,
{ 4, 4, 4, 3, 3 },
{ { 2, 0 }, { 3, 1 }, { 4, MAX_K } },
},
{
"JGE",
.u.insns = {
BPF_STMT(BPF_LDX | BPF_LEN, 0),
BPF_STMT(BPF_LD | BPF_B | BPF_IND, MAX_K),
BPF_JUMP(BPF_JMP | BPF_JGE | BPF_K, 1, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 10),
BPF_JUMP(BPF_JMP | BPF_JGE | BPF_K, 2, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 20),
BPF_JUMP(BPF_JMP | BPF_JGE | BPF_K, 3, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 30),
BPF_JUMP(BPF_JMP | BPF_JGE | BPF_K, 4, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 40),
BPF_STMT(BPF_RET | BPF_K, MAX_K)
},
CLASSIC,
{ 1, 2, 3, 4, 5 },
{ { 1, 20 }, { 3, 40 }, { 5, MAX_K } },
},
{
"JSET",
.u.insns = {
BPF_JUMP(BPF_JMP | BPF_JA, 0, 0, 0),
BPF_JUMP(BPF_JMP | BPF_JA, 1, 1, 1),
BPF_JUMP(BPF_JMP | BPF_JA, 0, 0, 0),
BPF_JUMP(BPF_JMP | BPF_JA, 0, 0, 0),
BPF_STMT(BPF_LDX | BPF_LEN, 0),
BPF_STMT(BPF_MISC | BPF_TXA, 0),
BPF_STMT(BPF_ALU | BPF_SUB | BPF_K, 4),
BPF_STMT(BPF_MISC | BPF_TAX, 0),
BPF_STMT(BPF_LD | BPF_W | BPF_IND, 0),
BPF_JUMP(BPF_JMP | BPF_JSET | BPF_K, 1, 0, 1),
BPF_STMT(BPF_RET | BPF_K, 10),
BPF_JUMP(BPF_JMP | BPF_JSET | BPF_K, 0x80000000, 0, 1),
BPF_STMT(BPF_RET | BPF_K, 20),
BPF_JUMP(BPF_JMP | BPF_JSET | BPF_K, 0xffffff, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 30),
BPF_JUMP(BPF_JMP | BPF_JSET | BPF_K, 0xffffff, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 30),
BPF_JUMP(BPF_JMP | BPF_JSET | BPF_K, 0xffffff, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 30),
BPF_JUMP(BPF_JMP | BPF_JSET | BPF_K, 0xffffff, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 30),
BPF_JUMP(BPF_JMP | BPF_JSET | BPF_K, 0xffffff, 1, 0),
BPF_STMT(BPF_RET | BPF_K, 30),
BPF_STMT(BPF_RET | BPF_K, MAX_K)
},
CLASSIC,
{ 0, 0xAA, 0x55, 1 },
{ { 4, 10 }, { 5, 20 }, { 6, MAX_K } },
},
{
"tcpdump port 22",
.u.insns = {
BPF_STMT(BPF_LD | BPF_H | BPF_ABS, 12),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x86dd, 0, 8), /* IPv6 */
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 20),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x84, 2, 0),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x6, 1, 0),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x11, 0, 17),
BPF_STMT(BPF_LD | BPF_H | BPF_ABS, 54),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 22, 14, 0),
BPF_STMT(BPF_LD | BPF_H | BPF_ABS, 56),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 22, 12, 13),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0800, 0, 12), /* IPv4 */
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 23),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x84, 2, 0),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x6, 1, 0),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x11, 0, 8),
BPF_STMT(BPF_LD | BPF_H | BPF_ABS, 20),
BPF_JUMP(BPF_JMP | BPF_JSET | BPF_K, 0x1fff, 6, 0),
BPF_STMT(BPF_LDX | BPF_B | BPF_MSH, 14),
BPF_STMT(BPF_LD | BPF_H | BPF_IND, 14),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 22, 2, 0),
BPF_STMT(BPF_LD | BPF_H | BPF_IND, 16),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 22, 0, 1),
BPF_STMT(BPF_RET | BPF_K, 0xffff),
BPF_STMT(BPF_RET | BPF_K, 0),
},
CLASSIC,
/* 3c:07:54:43:e5:76 > 10:bf:48:d6:43:d6, ethertype IPv4(0x0800)
* length 114: 10.1.1.149.49700 > 10.1.2.10.22: Flags [P.],
* seq 1305692979:1305693027, ack 3650467037, win 65535,
* options [nop,nop,TS val 2502645400 ecr 3971138], length 48
*/
{ 0x10, 0xbf, 0x48, 0xd6, 0x43, 0xd6,
0x3c, 0x07, 0x54, 0x43, 0xe5, 0x76,
0x08, 0x00,
0x45, 0x10, 0x00, 0x64, 0x75, 0xb5,
0x40, 0x00, 0x40, 0x06, 0xad, 0x2e, /* IP header */
0x0a, 0x01, 0x01, 0x95, /* ip src */
0x0a, 0x01, 0x02, 0x0a, /* ip dst */
0xc2, 0x24,
0x00, 0x16 /* dst port */ },
{ { 10, 0 }, { 30, 0 }, { 100, 65535 } },
},
{
"tcpdump complex",
.u.insns = {
/* tcpdump -nei eth0 'tcp port 22 and (((ip[2:2] -
* ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0) and
* (len > 115 or len < 30000000000)' -d
*/
BPF_STMT(BPF_LD | BPF_H | BPF_ABS, 12),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x86dd, 30, 0),
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x800, 0, 29),
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 23),