ip_divert.h revision 126239
1126239Smlaier/*- 2126239Smlaier * Copyright (c) 2003 Sam Leffler, Errno Consulting 3126239Smlaier * All rights reserved. 4126239Smlaier * 5126239Smlaier * Redistribution and use in source and binary forms, with or without 6126239Smlaier * modification, are permitted provided that the following conditions 7126239Smlaier * are met: 8126239Smlaier * 1. Redistributions of source code must retain the above copyright 9126239Smlaier * notice, this list of conditions and the following disclaimer, 10126239Smlaier * without modification. 11126239Smlaier * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12126239Smlaier * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 13126239Smlaier * redistribution must be conditioned upon including a substantially 14126239Smlaier * similar Disclaimer requirement for further binary redistribution. 15126239Smlaier * 3. Neither the names of the above-listed copyright holders nor the names 16126239Smlaier * of any contributors may be used to endorse or promote products derived 17126239Smlaier * from this software without specific prior written permission. 18126239Smlaier * 19126239Smlaier * NO WARRANTY 20126239Smlaier * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21126239Smlaier * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22126239Smlaier * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 23126239Smlaier * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 24126239Smlaier * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 25126239Smlaier * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26126239Smlaier * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27126239Smlaier * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 28126239Smlaier * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29126239Smlaier * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30126239Smlaier * THE POSSIBILITY OF SUCH DAMAGES. 31126239Smlaier * 32126239Smlaier * $FreeBSD: head/sys/netinet/ip_divert.h 126239 2004-02-25 19:55:29Z mlaier $ 33126239Smlaier */ 34126239Smlaier 35126239Smlaier#ifndef _NETINET_IP_DIVERT_H_ 36126239Smlaier#define _NETINET_IP_DIVERT_H_ 37126239Smlaier 38126239Smlaier/* 39126239Smlaier * Divert socket definitions. 40126239Smlaier */ 41126239Smlaier 42126239Smlaierstruct divert_tag { 43126239Smlaier u_int32_t info; /* port & flags */ 44126239Smlaier u_int16_t cookie; /* ipfw rule number */ 45126239Smlaier}; 46126239Smlaier 47126239Smlaier/* 48126239Smlaier * Return the divert cookie associated with the mbuf; if any. 49126239Smlaier */ 50126239Smlaierstatic __inline u_int16_t 51126239Smlaierdivert_cookie(struct m_tag *mtag) 52126239Smlaier{ 53126239Smlaier return ((struct divert_tag *)(mtag+1))->cookie; 54126239Smlaier} 55126239Smlaierstatic __inline u_int16_t 56126239Smlaierdivert_find_cookie(struct mbuf *m) 57126239Smlaier{ 58126239Smlaier struct m_tag *mtag = m_tag_find(m, PACKET_TAG_DIVERT, NULL); 59126239Smlaier return mtag ? divert_cookie(mtag) : 0; 60126239Smlaier} 61126239Smlaier 62126239Smlaier/* 63126239Smlaier * Return the divert info associated with the mbuf; if any. 64126239Smlaier */ 65126239Smlaierstatic __inline u_int32_t 66126239Smlaierdivert_info(struct m_tag *mtag) 67126239Smlaier{ 68126239Smlaier return ((struct divert_tag *)(mtag+1))->info; 69126239Smlaier} 70126239Smlaierstatic __inline u_int32_t 71126239Smlaierdivert_find_info(struct mbuf *m) 72126239Smlaier{ 73126239Smlaier struct m_tag *mtag = m_tag_find(m, PACKET_TAG_DIVERT, NULL); 74126239Smlaier return mtag ? divert_info(mtag) : 0; 75126239Smlaier} 76126239Smlaier 77126239Smlaierextern void div_init(void); 78126239Smlaierextern void div_input(struct mbuf *, int); 79126239Smlaierextern void div_ctlinput(int, struct sockaddr *, void *); 80126239Smlaierextern void divert_packet(struct mbuf *m, int incoming); 81126239Smlaierextern struct mbuf *divert_clone(struct mbuf *); 82126239Smlaierextern struct pr_usrreqs div_usrreqs; 83126239Smlaier#endif /* _NETINET_IP_DIVERT_H_ */ 84