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File: [cvs.NetBSD.org] / src / sys / netinet6 / ip6protosw.h (download)
Revision 1.19, Thu Jul 19 20:48:57 2007 UTC (16 years, 8 months ago) by dyoung
Take steps to hide the radix_node implementation of the forwarding table from the forwarding table's users: Introduce rt_walktree() for walking the routing table and applying a function to each rtentry. Replace most rn_walktree() calls with it. Use rt_getkey()/rt_setkey() to get/set a route's destination. Keep a pointer to the sockaddr key in the rtentry, so that rtentry users do not have to grovel in the radix_node for the key. Add a RTM_GET method to rtrequest. Use that instead of radix_node lookups in, e.g., carp(4). Add sys/net/link_proto.c, which supplies sockaddr routines for link-layer socket addresses (sockaddr_dl). Cosmetic: Constify. KNF. Stop open-coding LIST_FOREACH, TAILQ_FOREACH, et cetera. Use NULL instead of 0 for null pointers. Use __arraycount(). Reduce gratuitous parenthesization. Stop using variadic arguments for rip6_output(), it is unnecessary. Remove the unnecessary rtentry member rt_genmask and the code to maintain it, since nothing actually used it. Make rt_maskedcopy() easier to read by using meaningful variable names. Extract a subroutine intern_netmask() for looking up a netmask in the masks table. Start converting backslash-ridden IPv6 macros in sys/netinet6/in6_var.h into inline subroutines that one can read without special eyeglasses. One functional change: when the kernel serves an RTM_GET, RTM_LOCK, or RTM_CHANGE request, it applies the netmask (if supplied) to a destination before searching for it in the forwarding table. I have changed sys/netinet/ip_carp.c, carp_setroute(), to remove the unlawful radix_node knowledge. Apart from the changes to carp(4), netiso, ATM, and strip(4), I have run the changes on three nodes in my wireless routing testbed, which involves IPv4 + IPv6 dynamic routing acrobatics, and it's working beautifully so far. |
/* $NetBSD: ip6protosw.h,v 1.19 2007/07/19 20:48:57 dyoung Exp $ */ /* $KAME: ip6protosw.h,v 1.22 2001/02/08 18:02:08 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ /* BSDI protosw.h,v 2.3 1996/10/11 16:02:40 pjd Exp */ /*- * Copyright (c) 1982, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)protosw.h 8.1 (Berkeley) 6/2/93 */ #ifndef _NETINET6_IP6PROTOSW_H_ #define _NETINET6_IP6PROTOSW_H_ /* * Protocol switch table for IPv6. * All other definitions should refer to sys/protosw.h */ struct mbuf; struct sockaddr; struct socket; struct domain; struct proc; struct ip6_hdr; struct icmp6_hdr; struct in6_addr; /* * argument type for the last arg of pr_ctlinput(). * should be consulted only with AF_INET6 family. * * IPv6 ICMP IPv6 [exthdrs] finalhdr paylaod * ^ ^ ^ ^ * | | ip6c_ip6 ip6c_off * | ip6c_icmp6 * ip6c_m * * ip6c_finaldst usually points to ip6c_ip6->ip6_dst. if the original * (internal) packet carries a routing header, it may point the final * dstination address in the routing header. * * ip6c_src: ip6c_ip6->ip6_src + scope info + flowlabel in ip6c_ip6 * (beware of flowlabel, if you try to compare it against others) * ip6c_dst: ip6c_finaldst + scope info */ struct ip6ctlparam { struct mbuf *ip6c_m; /* start of mbuf chain */ struct icmp6_hdr *ip6c_icmp6; /* icmp6 header of target packet */ struct ip6_hdr *ip6c_ip6; /* ip6 header of target packet */ int ip6c_off; /* offset of the target proto header */ struct sockaddr_in6 *ip6c_src; /* srcaddr w/ additional info */ struct sockaddr_in6 *ip6c_dst; /* (final) dstaddr w/ additional info */ struct in6_addr *ip6c_finaldst; /* final destination address */ void *ip6c_cmdarg; /* control command dependent data */ u_int8_t ip6c_nxt; /* final next header field */ }; struct ip6protosw { int pr_type; /* socket type used for */ struct domain *pr_domain; /* domain protocol a member of */ short pr_protocol; /* protocol number */ short pr_flags; /* see below */ /* protocol-protocol hooks */ int (*pr_input) /* input to protocol (from below) */ (struct mbuf **, int *, int); int (*pr_output) /* output to protocol (from above) */ (struct mbuf *, struct socket *, struct sockaddr_in6 *, struct mbuf *); void (*pr_ctlinput) /* control input (from below) */ (int, const struct sockaddr *, void *); int (*pr_ctloutput) /* control output (from above) */ (int, struct socket *, int, int, struct mbuf **); /* user-protocol hook */ int (*pr_usrreq) /* user request: see list below */ (struct socket *, int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *); /* utility hooks */ void (*pr_init) /* initialization hook */ (void); void (*pr_fasttimo) /* fast timeout (200ms) */ (void); void (*pr_slowtimo) /* slow timeout (500ms) */ (void); void (*pr_drain) /* flush any excess space possible */ (void); }; extern const struct ip6protosw inet6sw[]; #endif /* !_NETINET6_IP6PROTOSW_H_ */