ip_divert.h revision 196502
1/*- 2 * Copyright (c) 2003 Sam Leffler, Errno Consulting 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 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13 * redistribution must be conditioned upon including a substantially 14 * similar Disclaimer requirement for further binary redistribution. 15 * 3. Neither the names of the above-listed copyright holders nor the names 16 * of any contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * NO WARRANTY 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 23 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 24 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 25 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 28 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGES. 31 * 32 * $FreeBSD: head/sys/netinet/ip_divert.h 196502 2009-08-24 10:06:02Z zec $ 33 */ 34 35#ifndef _NETINET_IP_DIVERT_H_ 36#define _NETINET_IP_DIVERT_H_ 37 38/* 39 * Sysctl declaration. 40 */ 41#ifdef SYSCTL_DECL 42SYSCTL_DECL(_net_inet_divert); 43#endif 44 45/* 46 * Divert socket definitions. 47 */ 48struct divert_tag { 49 u_int32_t info; /* port & flags */ 50 u_int16_t cookie; /* ipfw rule number */ 51}; 52 53/* 54 * Return the divert cookie associated with the mbuf; if any. 55 */ 56static __inline u_int16_t 57divert_cookie(struct m_tag *mtag) 58{ 59 return ((struct divert_tag *)(mtag+1))->cookie; 60} 61static __inline u_int16_t 62divert_find_cookie(struct mbuf *m) 63{ 64 struct m_tag *mtag = m_tag_find(m, PACKET_TAG_DIVERT, NULL); 65 return mtag ? divert_cookie(mtag) : 0; 66} 67 68/* 69 * Return the divert info associated with the mbuf; if any. 70 */ 71static __inline u_int32_t 72divert_info(struct m_tag *mtag) 73{ 74 return ((struct divert_tag *)(mtag+1))->info; 75} 76static __inline u_int32_t 77divert_find_info(struct mbuf *m) 78{ 79 struct m_tag *mtag = m_tag_find(m, PACKET_TAG_DIVERT, NULL); 80 return mtag ? divert_info(mtag) : 0; 81} 82 83typedef void ip_divert_packet_t(struct mbuf *m, int incoming); 84extern ip_divert_packet_t *ip_divert_ptr; 85 86extern void div_input(struct mbuf *, int); 87extern void div_ctlinput(int, struct sockaddr *, void *); 88#endif /* _NETINET_IP_DIVERT_H_ */ 89