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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #ifndef _INET_IP_FTABLE_H
     28 #define	_INET_IP_FTABLE_H
     29 
     30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     31 
     32 #ifdef	__cplusplus
     33 extern "C" {
     34 #endif
     35 
     36 #ifdef 	_KERNEL
     37 
     38 #include <net/radix.h>
     39 #include <inet/common.h>
     40 #include <inet/ip.h>
     41 
     42 struct rt_entry {
     43 	struct	radix_node rt_nodes[2];	/* tree glue, and other values */
     44 	/*
     45 	 * struct rt_entry must begin with a struct radix_node (or two!)
     46 	 * to a 'struct rt_entry *'
     47 	 */
     48 	struct rt_sockaddr rt_dst;
     49 	/*
     50 	 * multiple routes to same dest/mask via varying gate/ifp are stored
     51 	 * in the rt_irb bucket.
     52 	 */
     53 	irb_t rt_irb;
     54 };
     55 
     56 /*
     57  * vehicle for passing args through rn_walktree
     58  *
     59  * The comment below (and for other netstack_t references) refers
     60  * to the fact that we only do netstack_hold in particular cases,
     61  * such as the references from open streams (ill_t and conn_t's
     62  * pointers). Internally within IP we rely on IP's ability to cleanup e.g.
     63  * ire_t's when an ill goes away.
     64  */
     65 struct rtfuncarg {
     66 	pfv_t rt_func;
     67 	char *rt_arg;
     68 	uint_t rt_match_flags;
     69 	uint_t rt_ire_type;
     70 	ill_t  *rt_ill;
     71 	zoneid_t rt_zoneid;
     72 	ip_stack_t *rt_ipst;   	/* Does not have a netstack_hold */
     73 };
     74 int rtfunc(struct radix_node *, void *);
     75 
     76 typedef struct rt_entry rt_t;
     77 typedef struct rtfuncarg rtf_t;
     78 
     79 /* For ire_forward() */
     80 enum ire_forward_action {
     81 	Forward_ok,			/* OK to use this IRE to forward */
     82 	Forward_check_multirt,		/* CGTP multirt check required */
     83 	Forward_ret_icmp_err,		/* Callers to return an ICMP error */
     84 	Forward_blackhole		/* Packet is silently discarded */
     85 };
     86 
     87 struct ts_label_s;
     88 extern	ire_t	*ire_ftable_lookup(ipaddr_t, ipaddr_t, ipaddr_t, int,
     89     const ipif_t *, ire_t **, zoneid_t, uint32_t,
     90     const struct ts_label_s *, int, ip_stack_t *);
     91 extern	ire_t *ire_lookup_multi(ipaddr_t, zoneid_t, ip_stack_t *);
     92 extern	ire_t *ipif_lookup_multi_ire(ipif_t *, ipaddr_t);
     93 extern	void ire_delete_host_redirects(ipaddr_t, ip_stack_t *);
     94 extern	ire_t *ire_ihandle_lookup_onlink(ire_t *);
     95 extern	ire_t *ire_forward(ipaddr_t, enum ire_forward_action *, ire_t *,
     96     ire_t *, const struct ts_label_s *, ip_stack_t *);
     97 extern irb_t	*ire_get_bucket(ire_t *);
     98 extern uint_t ifindex_lookup(const struct sockaddr *, zoneid_t);
     99 extern int ipfil_sendpkt(const struct sockaddr *, mblk_t *, uint_t, zoneid_t);
    100 
    101 extern void  irb_refhold_rn(struct radix_node *);
    102 extern void  irb_refrele_rn(struct radix_node *);
    103 
    104 #endif /* _KERNEL */
    105 
    106 #ifdef	__cplusplus
    107 }
    108 #endif
    109 
    110 #endif	/* _INET_IP_FTABLE_H */
    111