1 /*- 2 * Copyright (c) 2015 Mindaugas Rasiukevicius <rmind at netbsd org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #ifndef _NPFKERN_H_ 28 #define _NPFKERN_H_ 29 30 #ifndef _KERNEL 31 #include <stdbool.h> 32 #include <inttypes.h> 33 #endif 34 35 struct mbuf; 36 struct ifnet; 37 38 #if defined(_NPF_STANDALONE) || !defined(__NetBSD__) 39 #define PFIL_IN 0x00000001 // incoming packet 40 #define PFIL_OUT 0x00000002 // outgoing packet 41 #endif 42 43 #define NPF_NO_GC 0x01 44 45 typedef struct { 46 const char * (*getname)(struct ifnet *); 47 struct ifnet * (*lookup)(const char *); 48 void (*flush)(void *); 49 void * (*getmeta)(const struct ifnet *); 50 void (*setmeta)(struct ifnet *, void *); 51 } npf_ifops_t; 52 53 typedef struct { 54 struct mbuf * (*alloc)(int, int); 55 void (*free)(struct mbuf *); 56 void * (*getdata)(const struct mbuf *); 57 struct mbuf * (*getnext)(struct mbuf *); 58 size_t (*getlen)(const struct mbuf *); 59 size_t (*getchainlen)(const struct mbuf *); 60 bool (*ensure_contig)(struct mbuf **, size_t); 61 bool (*ensure_writable)(struct mbuf **, size_t); 62 } npf_mbufops_t; 63 64 int npf_sysinit(unsigned); 65 void npf_sysfini(void); 66 67 npf_t * npf_create(int, const npf_mbufops_t *, const npf_ifops_t *); 68 int npf_load(npf_t *, void *, npf_error_t *); 69 void npf_gc(npf_t *); 70 void npf_destroy(npf_t *); 71 72 void npf_thread_register(npf_t *); 73 int npf_packet_handler(npf_t *, struct mbuf **, struct ifnet *, int); 74 void npf_ifmap_attach(npf_t *, struct ifnet *); 75 void npf_ifmap_detach(npf_t *, struct ifnet *); 76 void npf_stats(npf_t *, uint64_t *); 77 78 #endif 79