2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
463 lines
10 KiB
C
463 lines
10 KiB
C
/* $NetBSD: rthdr.c,v 1.17 2009/02/05 23:22:39 lukem Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: rthdr.c,v 1.17 2009/02/05 23:22:39 lukem Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/ip6.h>
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#include <assert.h>
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#include <string.h>
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#include <stdio.h>
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#ifdef __weak_alias
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__weak_alias(inet6_rthdr_add,_inet6_rthdr_add)
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__weak_alias(inet6_rthdr_getaddr,_inet6_rthdr_getaddr)
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__weak_alias(inet6_rthdr_getflags,_inet6_rthdr_getflags)
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__weak_alias(inet6_rthdr_init,_inet6_rthdr_init)
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__weak_alias(inet6_rthdr_lasthop,_inet6_rthdr_lasthop)
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__weak_alias(inet6_rthdr_segments,_inet6_rthdr_segments)
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__weak_alias(inet6_rthdr_space,_inet6_rthdr_space)
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__weak_alias(inet6_rth_space, _inet6_rth_space)
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__weak_alias(inet6_rth_init, _inet6_rth_init)
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__weak_alias(inet6_rth_add, _inet6_rth_add)
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__weak_alias(inet6_rth_reverse, _inet6_rth_reverse)
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__weak_alias(inet6_rth_segments, _inet6_rth_segments)
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__weak_alias(inet6_rth_getaddr, _inet6_rth_getaddr)
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#endif
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/*
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* RFC2292 API
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*/
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size_t
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inet6_rthdr_space(type, seg)
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int type, seg;
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{
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switch (type) {
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case IPV6_RTHDR_TYPE_0:
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if (seg < 1 || seg > 23)
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return (0);
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return (CMSG_SPACE(sizeof(struct in6_addr) * seg +
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sizeof(struct ip6_rthdr0)));
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default:
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return (0);
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}
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}
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struct cmsghdr *
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inet6_rthdr_init(bp, type)
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void *bp;
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int type;
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{
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struct cmsghdr *ch;
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struct ip6_rthdr *rthdr;
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_DIAGASSERT(bp != NULL);
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ch = (struct cmsghdr *)bp;
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rthdr = (struct ip6_rthdr *)(void *)CMSG_DATA(ch);
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ch->cmsg_level = IPPROTO_IPV6;
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ch->cmsg_type = IPV6_RTHDR;
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switch (type) {
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case IPV6_RTHDR_TYPE_0:
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#ifdef COMPAT_RFC2292
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ch->cmsg_len = CMSG_LEN(sizeof(struct ip6_rthdr0) -
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sizeof(struct in6_addr));
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#else
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ch->cmsg_len = CMSG_LEN(sizeof(struct ip6_rthdr0));
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#endif
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(void)memset(rthdr, 0, sizeof(struct ip6_rthdr0));
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rthdr->ip6r_type = IPV6_RTHDR_TYPE_0;
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return (ch);
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default:
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return (NULL);
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}
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}
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int
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inet6_rthdr_add(cmsg, addr, flags)
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struct cmsghdr *cmsg;
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const struct in6_addr *addr;
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u_int flags;
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{
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struct ip6_rthdr *rthdr;
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_DIAGASSERT(cmsg != NULL);
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_DIAGASSERT(addr != NULL);
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rthdr = (struct ip6_rthdr *)(void *)CMSG_DATA(cmsg);
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switch (rthdr->ip6r_type) {
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case IPV6_RTHDR_TYPE_0:
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{
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struct ip6_rthdr0 *rt0 = (struct ip6_rthdr0 *)(void *)rthdr;
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if (flags != IPV6_RTHDR_LOOSE && flags != IPV6_RTHDR_STRICT)
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return (-1);
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if (rt0->ip6r0_segleft == 23)
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return (-1);
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if (flags != IPV6_RTHDR_LOOSE)
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return (-1);
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rt0->ip6r0_segleft++;
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(void)memcpy(((caddr_t)(void *)rt0) +
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((rt0->ip6r0_len + 1) << 3), addr, sizeof(struct in6_addr));
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rt0->ip6r0_len += sizeof(struct in6_addr) >> 3;
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cmsg->cmsg_len = CMSG_LEN((rt0->ip6r0_len + 1) << 3);
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break;
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}
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default:
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return (-1);
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}
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return (0);
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}
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int
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inet6_rthdr_lasthop(cmsg, flags)
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struct cmsghdr *cmsg;
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unsigned int flags;
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{
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struct ip6_rthdr *rthdr;
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_DIAGASSERT(cmsg != NULL);
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rthdr = (struct ip6_rthdr *)(void *)CMSG_DATA(cmsg);
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switch (rthdr->ip6r_type) {
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case IPV6_RTHDR_TYPE_0:
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{
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struct ip6_rthdr0 *rt0 = (struct ip6_rthdr0 *)(void *)rthdr;
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if (rt0->ip6r0_segleft > 23)
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return (-1);
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if (flags != IPV6_RTHDR_LOOSE)
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return (-1);
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break;
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}
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default:
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return (-1);
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}
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return (0);
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}
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#if 0
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int
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inet6_rthdr_reverse(in, out)
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const struct cmsghdr *in;
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struct cmsghdr *out;
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{
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return (-1);
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}
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#endif
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int
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inet6_rthdr_segments(cmsg)
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const struct cmsghdr *cmsg;
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{
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const struct ip6_rthdr *rthdr;
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_DIAGASSERT(cmsg != NULL);
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rthdr = __UNCONST(CCMSG_DATA(cmsg));
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switch (rthdr->ip6r_type) {
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case IPV6_RTHDR_TYPE_0:
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{
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const struct ip6_rthdr0 *rt0 =
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(const struct ip6_rthdr0 *)(const void *)rthdr;
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if (rt0->ip6r0_len % 2 || 46 < rt0->ip6r0_len)
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return (-1);
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return (rt0->ip6r0_len * 8) / sizeof(struct in6_addr);
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}
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default:
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return (-1);
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}
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}
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struct in6_addr *
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inet6_rthdr_getaddr(cmsg, idx)
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struct cmsghdr *cmsg;
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int idx;
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{
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struct ip6_rthdr *rthdr;
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_DIAGASSERT(cmsg != NULL);
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rthdr = (struct ip6_rthdr *)(void *)CMSG_DATA(cmsg);
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switch (rthdr->ip6r_type) {
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case IPV6_RTHDR_TYPE_0:
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{
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struct ip6_rthdr0 *rt0 = (struct ip6_rthdr0 *)(void *)rthdr;
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int naddr;
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if (rt0->ip6r0_len % 2 || 46 < rt0->ip6r0_len)
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return NULL;
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naddr = (rt0->ip6r0_len * 8) / sizeof(struct in6_addr);
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if (idx <= 0 || naddr < idx)
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return NULL;
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#ifdef COMPAT_RFC2292
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return ((struct in6_addr *)(void *)(rt0 + 1)) + idx - 1;
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#else
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return ((struct in6_addr *)(void *)(rt0 + 1)) + idx;
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#endif
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}
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default:
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return NULL;
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}
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}
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int
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inet6_rthdr_getflags(cmsg, idx)
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const struct cmsghdr *cmsg;
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int idx;
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{
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const struct ip6_rthdr *rthdr;
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_DIAGASSERT(cmsg != NULL);
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rthdr = __UNCONST(CCMSG_DATA(cmsg));
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switch (rthdr->ip6r_type) {
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case IPV6_RTHDR_TYPE_0:
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{
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const struct ip6_rthdr0 *rt0 = (const struct ip6_rthdr0 *)
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(const void *)rthdr;
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int naddr;
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if (rt0->ip6r0_len % 2 || 46 < rt0->ip6r0_len)
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return (-1);
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naddr = (rt0->ip6r0_len * 8) / sizeof(struct in6_addr);
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if (idx < 0 || naddr < idx)
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return (-1);
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return IPV6_RTHDR_LOOSE;
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}
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default:
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return (-1);
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}
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}
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/*
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* RFC3542 (2292bis) API
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*/
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socklen_t
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inet6_rth_space(int type, int segments)
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{
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switch (type) {
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case IPV6_RTHDR_TYPE_0:
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return (((segments * 2) + 1) << 3);
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default:
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return (0); /* type not suppported */
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}
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}
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void *
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inet6_rth_init(void *bp, socklen_t bp_len, int type, int segments)
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{
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struct ip6_rthdr *rth;
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struct ip6_rthdr0 *rth0;
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_DIAGASSERT(bp != NULL);
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rth = (struct ip6_rthdr *)bp;
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switch (type) {
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case IPV6_RTHDR_TYPE_0:
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/* length validation */
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if (bp_len < inet6_rth_space(IPV6_RTHDR_TYPE_0, segments))
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return (NULL);
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memset(bp, 0, bp_len);
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rth0 = (struct ip6_rthdr0 *)(void *)rth;
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rth0->ip6r0_len = segments * 2;
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rth0->ip6r0_type = IPV6_RTHDR_TYPE_0;
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rth0->ip6r0_segleft = 0;
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rth0->ip6r0_reserved = 0;
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break;
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default:
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return (NULL); /* type not supported */
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}
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return (bp);
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}
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int
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inet6_rth_add(void *bp, const struct in6_addr *addr)
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{
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struct ip6_rthdr *rth;
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struct ip6_rthdr0 *rth0;
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struct in6_addr *nextaddr;
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_DIAGASSERT(bp != NULL);
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rth = (struct ip6_rthdr *)bp;
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switch (rth->ip6r_type) {
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case IPV6_RTHDR_TYPE_0:
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rth0 = (struct ip6_rthdr0 *)(void *)rth;
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nextaddr = (struct in6_addr *)(void *)(rth0 + 1)
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+ rth0->ip6r0_segleft;
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*nextaddr = *addr;
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rth0->ip6r0_segleft++;
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break;
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default:
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return (-1); /* type not supported */
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}
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return (0);
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}
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int
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inet6_rth_reverse(const void *in, void *out)
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{
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const struct ip6_rthdr *rth_in;
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const struct ip6_rthdr0 *rth0_in;
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struct ip6_rthdr0 *rth0_out;
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int i, segments;
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_DIAGASSERT(in != NULL);
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_DIAGASSERT(out != NULL);
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rth_in = (const struct ip6_rthdr *)in;
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switch (rth_in->ip6r_type) {
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case IPV6_RTHDR_TYPE_0:
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rth0_in = (const struct ip6_rthdr0 *)in;
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rth0_out = (struct ip6_rthdr0 *)out;
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/* parameter validation XXX too paranoid? */
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if (rth0_in->ip6r0_len % 2)
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return (-1);
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segments = rth0_in->ip6r0_len / 2;
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/* we can't use memcpy here, since in and out may overlap */
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memmove((void *)rth0_out, (const void *)rth0_in,
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(unsigned int)(((rth0_in->ip6r0_len) + 1) << 3));
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rth0_out->ip6r0_segleft = segments;
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/* reverse the addresses */
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for (i = 0; i < segments / 2; i++) {
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struct in6_addr addr_tmp, *addr1, *addr2;
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addr1 = (struct in6_addr *)(void *)(rth0_out + 1) + i;
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addr2 = (struct in6_addr *)(void *)(rth0_out + 1) +
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(segments - i - 1);
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addr_tmp = *addr1;
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*addr1 = *addr2;
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*addr2 = addr_tmp;
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}
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break;
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default:
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return (-1); /* type not supported */
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}
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return (0);
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}
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int
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inet6_rth_segments(const void *bp)
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{
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const struct ip6_rthdr *rh;
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const struct ip6_rthdr0 *rh0;
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unsigned int addrs;
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_DIAGASSERT(bp != NULL);
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rh = (const struct ip6_rthdr *)bp;
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switch (rh->ip6r_type) {
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case IPV6_RTHDR_TYPE_0:
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rh0 = (const struct ip6_rthdr0 *)bp;
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/*
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* Validation for a type-0 routing header.
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* Is this too strict?
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*/
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if ((rh0->ip6r0_len % 2) != 0 ||
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(addrs = (rh0->ip6r0_len / 2)) < rh0->ip6r0_segleft)
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return (-1);
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return (addrs);
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default:
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return (-1); /* unknown type */
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}
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}
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struct in6_addr *
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inet6_rth_getaddr(const void *bp, int idx)
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{
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const struct ip6_rthdr *rh;
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const struct ip6_rthdr0 *rh0;
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unsigned int addrs;
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_DIAGASSERT(bp != NULL);
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rh = (const struct ip6_rthdr *)bp;
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switch (rh->ip6r_type) {
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case IPV6_RTHDR_TYPE_0:
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rh0 = (const struct ip6_rthdr0 *)bp;
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/*
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* Validation for a type-0 routing header.
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* Is this too strict?
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*/
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if ((rh0->ip6r0_len % 2) != 0 ||
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(addrs = (rh0->ip6r0_len / 2)) < rh0->ip6r0_segleft)
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return (NULL);
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if (idx < 0 || addrs <= (unsigned int)idx)
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return (NULL);
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return (((struct in6_addr *)(void *)__UNCONST(rh0 + 1)) + idx);
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default:
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return (NULL); /* unknown type */
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}
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}
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