dadc88e3b0
- Add support for dynamic NETMAP algorithm (stateful net-to-net). - Add most of the support for the dynamic NAT rules; a little bit more userland work is needed to finish this up and enable. - Replace 'stateful-ends' with more permissive 'stateful-all'. - Add various tunable parameters and document them, see npf-params(7). - Reduce the memory usage of the connection state table (conndb). - Portmap rewrite: use memory more efficiently, handle addresses dynamically. - Bug fix: add splsoftnet()/splx() around the thmap writers and comment. - npftest: clean up and simplify; fix some memleaks to make ASAN happy.
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Mindaugas Rasiukevicius.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* NPF tests of BPF coprocessor.
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*/
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#ifdef _KERNEL
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#include <sys/types.h>
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#include <sys/endian.h>
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#endif
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#define NPF_BPFCOP
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#include "npf_impl.h"
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#include "npf_test.h"
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static bool lverbose = false;
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static int
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test_bpf_code(void *code, size_t size)
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{
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uint32_t memstore[BPF_MEMWORDS];
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bpf_args_t bc_args;
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npf_cache_t *npc;
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struct mbuf *m;
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int ret, jret;
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void *jcode;
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/* Layer 3 (IP + TCP). */
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m = mbuf_get_pkt(AF_INET, IPPROTO_TCP,
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"192.168.2.100", "10.0.0.1", 15000, 80);
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npc = get_cached_pkt(m, NULL);
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#ifdef _NPF_STANDALONE
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bc_args.pkt = (const uint8_t *)nbuf_dataptr(npc->npc_nbuf);
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#else
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bc_args.pkt = (const uint8_t *)m;
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#endif
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bc_args.buflen = m_length(m);
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bc_args.wirelen = bc_args.buflen;
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bc_args.mem = memstore;
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bc_args.arg = npc;
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ret = npf_bpf_filter(&bc_args, code, NULL);
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/* JIT-compiled code. */
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jcode = npf_bpf_compile(code, size);
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if (jcode) {
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jret = npf_bpf_filter(&bc_args, NULL, jcode);
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assert(ret == jret); (void)jret;
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bpf_jit_freecode(jcode);
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} else if (lverbose) {
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printf("JIT-compilation failed\n");
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}
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put_cached_pkt(npc);
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return ret;
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}
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static uint32_t
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npf_bpfcop_run(unsigned reg)
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{
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struct bpf_insn insns_npf_bpfcop[] = {
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BPF_STMT(BPF_MISC+BPF_COP, NPF_COP_L3),
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BPF_STMT(BPF_LD+BPF_W+BPF_MEM, reg),
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BPF_STMT(BPF_RET+BPF_A, 0),
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};
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return test_bpf_code(&insns_npf_bpfcop, sizeof(insns_npf_bpfcop));
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}
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static bool
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npf_bpfcop_test(void)
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{
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/* A <- IP version (4 or 6) */
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struct bpf_insn insns_ipver[] = {
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BPF_STMT(BPF_MISC+BPF_COP, NPF_COP_L3),
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BPF_STMT(BPF_RET+BPF_A, 0),
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};
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CHECK_TRUE(test_bpf_code(&insns_ipver, sizeof(insns_ipver)) == IPVERSION);
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/* BPF_MW_IPVERI <- IP version */
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CHECK_TRUE(npf_bpfcop_run(BPF_MW_IPVER) == IPVERSION);
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/* BPF_MW_L4OFF <- L4 header offset */
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CHECK_TRUE(npf_bpfcop_run(BPF_MW_L4OFF) == sizeof(struct ip));
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/* BPF_MW_L4PROTO <- L4 protocol */
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CHECK_TRUE(npf_bpfcop_run(BPF_MW_L4PROTO) == IPPROTO_TCP);
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return true;
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}
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bool
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npf_bpf_test(bool verbose)
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{
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lverbose = verbose;
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return npf_bpfcop_test();
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}
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