1ae275efcSJung-uk Kim /*- 23bfea868SJung-uk Kim * Copyright (C) 2002-2003 NetGroup, Politecnico di Torino (Italy) 33bfea868SJung-uk Kim * Copyright (C) 2005-2008 Jung-uk Kim <jkim@FreeBSD.org> 4ae275efcSJung-uk Kim * All rights reserved. 5ae275efcSJung-uk Kim * 6ae275efcSJung-uk Kim * Redistribution and use in source and binary forms, with or without 7ae275efcSJung-uk Kim * modification, are permitted provided that the following conditions 8ae275efcSJung-uk Kim * are met: 9ae275efcSJung-uk Kim * 10ae275efcSJung-uk Kim * 1. Redistributions of source code must retain the above copyright 11ae275efcSJung-uk Kim * notice, this list of conditions and the following disclaimer. 12ae275efcSJung-uk Kim * 2. Redistributions in binary form must reproduce the above copyright 13ae275efcSJung-uk Kim * notice, this list of conditions and the following disclaimer in the 14ae275efcSJung-uk Kim * documentation and/or other materials provided with the distribution. 15ae275efcSJung-uk Kim * 3. Neither the name of the Politecnico di Torino nor the names of its 16ae275efcSJung-uk Kim * contributors may be used to endorse or promote products derived from 17ae275efcSJung-uk Kim * this software without specific prior written permission. 18ae275efcSJung-uk Kim * 19ae275efcSJung-uk Kim * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20ae275efcSJung-uk Kim * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21ae275efcSJung-uk Kim * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22ae275efcSJung-uk Kim * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23ae275efcSJung-uk Kim * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24ae275efcSJung-uk Kim * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25ae275efcSJung-uk Kim * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26f471e569SJung-uk Kim * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27ae275efcSJung-uk Kim * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28ae275efcSJung-uk Kim * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29ae275efcSJung-uk Kim * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30ae275efcSJung-uk Kim */ 31ae275efcSJung-uk Kim 32ae275efcSJung-uk Kim #include <sys/cdefs.h> 33ae275efcSJung-uk Kim __FBSDID("$FreeBSD$"); 34ae275efcSJung-uk Kim 353bfea868SJung-uk Kim #ifdef _KERNEL 36ae275efcSJung-uk Kim #include "opt_bpf.h" 37ae275efcSJung-uk Kim 38ae275efcSJung-uk Kim #include <sys/param.h> 39ae275efcSJung-uk Kim #include <sys/kernel.h> 40ae275efcSJung-uk Kim #include <sys/malloc.h> 41ae275efcSJung-uk Kim #include <sys/mbuf.h> 42848c454cSJung-uk Kim #include <sys/sysctl.h> 433bfea868SJung-uk Kim #else 443bfea868SJung-uk Kim #include <stdlib.h> 453bfea868SJung-uk Kim #include <sys/types.h> 463bfea868SJung-uk Kim #endif 47ae275efcSJung-uk Kim 48ae275efcSJung-uk Kim #include <net/bpf.h> 49ae275efcSJung-uk Kim #include <net/bpf_jitter.h> 50ae275efcSJung-uk Kim 51ae275efcSJung-uk Kim bpf_filter_func bpf_jit_compile(struct bpf_insn *, u_int, int *); 52ae275efcSJung-uk Kim 533bfea868SJung-uk Kim #ifdef _KERNEL 543bfea868SJung-uk Kim MALLOC_DEFINE(M_BPFJIT, "BPF_JIT", "BPF JIT compiler"); 553bfea868SJung-uk Kim 56848c454cSJung-uk Kim SYSCTL_NODE(_net, OID_AUTO, bpf_jitter, CTLFLAG_RW, 0, "BPF JIT compiler"); 57848c454cSJung-uk Kim int bpf_jitter_enable = 1; 58848c454cSJung-uk Kim SYSCTL_INT(_net_bpf_jitter, OID_AUTO, enable, CTLFLAG_RW, 59848c454cSJung-uk Kim &bpf_jitter_enable, 0, "enable BPF JIT compiler"); 60848c454cSJung-uk Kim 61ae275efcSJung-uk Kim bpf_jit_filter * 62ae275efcSJung-uk Kim bpf_jitter(struct bpf_insn *fp, int nins) 63ae275efcSJung-uk Kim { 64ae275efcSJung-uk Kim bpf_jit_filter *filter; 65ae275efcSJung-uk Kim 66ae275efcSJung-uk Kim /* Allocate the filter structure */ 673bfea868SJung-uk Kim filter = (struct bpf_jit_filter *)malloc(sizeof(*filter), 686a96c483SJung-uk Kim M_BPFJIT, M_NOWAIT); 69ae275efcSJung-uk Kim if (filter == NULL) 703bfea868SJung-uk Kim return (NULL); 71ae275efcSJung-uk Kim 72ae275efcSJung-uk Kim /* Create the binary */ 73ae275efcSJung-uk Kim if ((filter->func = bpf_jit_compile(fp, nins, filter->mem)) == NULL) { 74ae275efcSJung-uk Kim free(filter, M_BPFJIT); 753bfea868SJung-uk Kim return (NULL); 76ae275efcSJung-uk Kim } 77ae275efcSJung-uk Kim 783bfea868SJung-uk Kim return (filter); 79ae275efcSJung-uk Kim } 80ae275efcSJung-uk Kim 81ae275efcSJung-uk Kim void 82ae275efcSJung-uk Kim bpf_destroy_jit_filter(bpf_jit_filter *filter) 83ae275efcSJung-uk Kim { 84ae275efcSJung-uk Kim 85ae275efcSJung-uk Kim free(filter->func, M_BPFJIT); 86ae275efcSJung-uk Kim free(filter, M_BPFJIT); 87ae275efcSJung-uk Kim } 883bfea868SJung-uk Kim #else 893bfea868SJung-uk Kim bpf_jit_filter * 903bfea868SJung-uk Kim bpf_jitter(struct bpf_insn *fp, int nins) 913bfea868SJung-uk Kim { 923bfea868SJung-uk Kim bpf_jit_filter *filter; 933bfea868SJung-uk Kim 943bfea868SJung-uk Kim /* Allocate the filter structure */ 953bfea868SJung-uk Kim filter = (struct bpf_jit_filter *)malloc(sizeof(*filter)); 963bfea868SJung-uk Kim if (filter == NULL) 973bfea868SJung-uk Kim return (NULL); 983bfea868SJung-uk Kim 993bfea868SJung-uk Kim /* Create the binary */ 1003bfea868SJung-uk Kim if ((filter->func = bpf_jit_compile(fp, nins, filter->mem)) == NULL) { 1013bfea868SJung-uk Kim free(filter); 1023bfea868SJung-uk Kim return (NULL); 1033bfea868SJung-uk Kim } 1043bfea868SJung-uk Kim 1053bfea868SJung-uk Kim return (filter); 1063bfea868SJung-uk Kim } 1073bfea868SJung-uk Kim 1083bfea868SJung-uk Kim void 1093bfea868SJung-uk Kim bpf_destroy_jit_filter(bpf_jit_filter *filter) 1103bfea868SJung-uk Kim { 1113bfea868SJung-uk Kim 1123bfea868SJung-uk Kim free(filter->func); 1133bfea868SJung-uk Kim free(filter); 1143bfea868SJung-uk Kim } 1153bfea868SJung-uk Kim #endif 116