+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*-
- * Copyright (c) 1991, 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. 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.
- *
- * @(#)clnp_output.c 8.1 (Berkeley) 6/10/93
- */
-
-/***********************************************************
- Copyright IBM Corporation 1987
-
- All Rights Reserved
-
-Permission to use, copy, modify, and distribute this software and its
-documentation for any purpose and without fee is hereby granted,
-provided that the above copyright notice appear in all copies and that
-both that copyright notice and this permission notice appear in
-supporting documentation, and that the name of IBM not be
-used in advertising or publicity pertaining to distribution of the
-software without specific, written prior permission.
-
-IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-
-******************************************************************/
-
-/*
- * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison
- */
-
-#include <sys/param.h>
-#include <sys/mbuf.h>
-#include <sys/domain.h>
-#include <sys/protosw.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/errno.h>
-#include <sys/time.h>
-
-#include <net/if.h>
-#include <net/route.h>
-
-#include <netiso/iso.h>
-#include <netiso/iso_var.h>
-#include <netiso/iso_pcb.h>
-#include <netiso/clnp.h>
-#include <netiso/clnp_stat.h>
-#include <netiso/argo_debug.h>
-
-static struct clnp_fixed dt_template = {
- ISO8473_CLNP, /* network identifier */
- 0, /* length */
- ISO8473_V1, /* version */
- CLNP_TTL, /* ttl */
- CLNP_DT|CNF_SEG_OK|CNF_ERR_OK, /* type */
- 0, /* segment length */
- 0 /* checksum */
-};
-
-static struct clnp_fixed raw_template = {
- ISO8473_CLNP, /* network identifier */
- 0, /* length */
- ISO8473_V1, /* version */
- CLNP_TTL, /* ttl */
- CLNP_RAW|CNF_SEG_OK|CNF_ERR_OK, /* type */
- 0, /* segment length */
- 0 /* checksum */
-};
-
-static struct clnp_fixed echo_template = {
- ISO8473_CLNP, /* network identifier */
- 0, /* length */
- ISO8473_V1, /* version */
- CLNP_TTL, /* ttl */
- CLNP_EC|CNF_SEG_OK|CNF_ERR_OK, /* type */
- 0, /* segment length */
- 0 /* checksum */
-};
-
-static struct clnp_fixed echor_template = {
- ISO8473_CLNP, /* network identifier */
- 0, /* length */
- ISO8473_V1, /* version */
- CLNP_TTL, /* ttl */
- CLNP_ECR|CNF_SEG_OK|CNF_ERR_OK, /* type */
- 0, /* segment length */
- 0 /* checksum */
-};
-
-#ifdef DECBIT
-u_char qos_option[] = {CLNPOVAL_QOS, 1,
- CLNPOVAL_GLOBAL|CLNPOVAL_SEQUENCING|CLNPOVAL_LOWDELAY};
-#endif /* DECBIT */
-
-int clnp_id = 0; /* id for segmented dgrams */
-
-/*
- * FUNCTION: clnp_output
- *
- * PURPOSE: output the data in the mbuf as a clnp datagram
- *
- * The data specified by m0 is sent as a clnp datagram.
- * The mbuf chain m0 will be freed when this routine has
- * returned.
- *
- * If options is non-null, it points to an mbuf which contains
- * options to be sent with the datagram. The options must
- * be formatted in the mbuf according to clnp rules. Options
- * will not be freed.
- *
- * Datalen specifies the length of the data in m0.
- *
- * Src and dst are the addresses for the packet.
- *
- * If route is non-null, it is used as the route for
- * the packet.
- *
- * By default, a DT is sent. However, if flags & CNLP_SEND_ER
- * then an ER will be sent. If flags & CLNP_SEND_RAW, then
- * the packet will be send as raw clnp.
- *
- * RETURNS: 0 success
- * appropriate error code
- *
- * SIDE EFFECTS: none
- *
- * NOTES:
- * Flags are interpretated as follows:
- * CLNP_NO_SEG - do not allow this pkt to be segmented.
- * CLNP_NO_ER - have pkt request ER suppression.
- * CLNP_SEND_RAW - send pkt as RAW DT rather than TP DT
- * CLNP_NO_CKSUM - don't compute clnp checksum
- * CLNP_ECHO - send as ECHO packet
- *
- * When checking for a cached packet, clnp checks
- * that the route taken is still up. It does not
- * check that the route is still to the same destination.
- * This means that any entity that alters an existing
- * route for an isopcb (such as when a redirect arrives)
- * must invalidate the clnp cache. It might be perferable
- * to have clnp check that the route has the same dest, but
- * by avoiding this check, we save a call to iso_addrmatch1.
- */
-clnp_output(m0, isop, datalen, flags)
-struct mbuf *m0; /* data for the packet */
-struct isopcb *isop; /* iso pcb */
-int datalen; /* number of bytes of data in m0 */
-int flags; /* flags */
-{
- int error = 0; /* return value of function */
- register struct mbuf *m = m0; /* mbuf for clnp header chain */
- register struct clnp_fixed *clnp; /* ptr to fixed part of hdr */
- register caddr_t hoff; /* offset into header */
- int total_len; /* total length of packet */
- struct iso_addr *src; /* ptr to source address */
- struct iso_addr *dst; /* ptr to destination address */
- struct clnp_cache clc; /* storage for cache information */
- struct clnp_cache *clcp = NULL; /* ptr to clc */
- int hdrlen = 0;
-
- dst = &isop->isop_faddr->siso_addr;
- if (isop->isop_laddr == 0) {
- struct iso_ifaddr *ia = 0;
- clnp_route(dst, &isop->isop_route, flags, 0, &ia);
- if (ia == 0 || ia->ia_ifa.ifa_addr->sa_family != AF_ISO)
- return (ENETUNREACH);
- src = &ia->ia_addr.siso_addr;
- } else
- src = &isop->isop_laddr->siso_addr;
-
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: to %s", clnp_iso_addrp(dst));
- printf(" from %s of %d bytes\n", clnp_iso_addrp(src), datalen);
- printf("\toptions x%x, flags x%x, isop_clnpcache x%x\n",
- isop->isop_options, flags, isop->isop_clnpcache);
- ENDDEBUG
-
- if (isop->isop_clnpcache != NULL) {
- clcp = mtod(isop->isop_clnpcache, struct clnp_cache *);
- }
-
- /*
- * Check if cache is valid ...
- */
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: ck cache: clcp %x\n", clcp);
- if (clcp != NULL) {
- printf("\tclc_dst %s\n", clnp_iso_addrp(&clcp->clc_dst));
- printf("\tisop_opts x%x, clc_opts x%x\n", isop->isop_options,
- clcp->clc_options);
- if (isop->isop_route.ro_rt)
- printf("\tro_rt x%x, rt_flags x%x\n",
- isop->isop_route.ro_rt, isop->isop_route.ro_rt->rt_flags);
- printf("\tflags x%x, clc_flags x%x\n", flags, clcp->clc_flags);
- printf("\tclc_hdr x%x\n", clcp->clc_hdr);
- }
- ENDDEBUG
- if ((clcp != NULL) && /* cache exists */
- (isop->isop_options == clcp->clc_options) && /* same options */
- (iso_addrmatch1(dst, &clcp->clc_dst)) && /* dst still same */
- (isop->isop_route.ro_rt != NULL) && /* route exists */
- (isop->isop_route.ro_rt == clcp->clc_rt) && /* and is cached */
- (isop->isop_route.ro_rt->rt_flags & RTF_UP) && /* route still up */
- (flags == clcp->clc_flags) && /* same flags */
- (clcp->clc_hdr != NULL)) { /* hdr mbuf exists */
- /*
- * The cache is valid
- */
-
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: using cache\n");
- ENDDEBUG
-
- m = m_copy(clcp->clc_hdr, 0, (int)M_COPYALL);
- if (m == NULL) {
- /*
- * No buffers left to copy cached packet header. Use
- * the cached packet header this time, and
- * mark the hdr as vacant
- */
- m = clcp->clc_hdr;
- clcp->clc_hdr = NULL;
- }
- m->m_next = m0; /* ASSUMES pkt hdr is 1 mbuf long */
- clnp = mtod(m, struct clnp_fixed *);
- } else {
- struct clnp_optidx *oidx = NULL; /* index to clnp options */
-
- /*
- * The cache is not valid. Allocate an mbuf (if necessary)
- * to hold cached info. If one is not available, then
- * don't bother with the cache
- */
- INCSTAT(cns_cachemiss);
- if (flags & CLNP_NOCACHE) {
- clcp = &clc;
- } else {
- if (isop->isop_clnpcache == NULL) {
- /*
- * There is no clnpcache. Allocate an mbuf to hold one
- */
- if ((isop->isop_clnpcache = m_get(M_DONTWAIT, MT_HEADER))
- == NULL) {
- /*
- * No mbufs available. Pretend that we don't want
- * caching this time.
- */
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: no mbufs to allocate to cache\n");
- ENDDEBUG
- flags |= CLNP_NOCACHE;
- clcp = &clc;
- } else {
- clcp = mtod(isop->isop_clnpcache, struct clnp_cache *);
- }
- } else {
- /*
- * A clnpcache mbuf exists. If the clc_hdr is not null,
- * we must free it, as a new one is about to be created.
- */
- clcp = mtod(isop->isop_clnpcache, struct clnp_cache *);
- if (clcp->clc_hdr != NULL) {
- /*
- * The clc_hdr is not null but a clnpcache mbuf exists.
- * This means that there was a cache, but the existing
- * copy of the hdr is no longer valid. Free it now
- * before we lose the pointer to it.
- */
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: freeing old clc_hdr 0x%x\n",
- clcp->clc_hdr);
- ENDDEBUG
- m_free(clcp->clc_hdr);
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: freed old clc_hdr (done)\n");
- ENDDEBUG
- }
- }
- }
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: NEW clcp x%x\n",clcp);
- ENDDEBUG
- bzero((caddr_t)clcp, sizeof(struct clnp_cache));
-
- if (isop->isop_optindex)
- oidx = mtod(isop->isop_optindex, struct clnp_optidx *);
-
- /*
- * Don't allow packets with security, quality of service,
- * priority, or error report options to be sent.
- */
- if ((isop->isop_options) && (oidx)) {
- if ((oidx->cni_securep) ||
- (oidx->cni_priorp) ||
- (oidx->cni_qos_formatp) ||
- (oidx->cni_er_reason != ER_INVALREAS)) {
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: pkt dropped - option unsupported\n");
- ENDDEBUG
- m_freem(m0);
- return(EINVAL);
- }
- }
-
- /*
- * Don't allow any invalid flags to be set
- */
- if ((flags & (CLNP_VFLAGS)) != flags) {
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: packet dropped - flags unsupported\n");
- ENDDEBUG
- INCSTAT(cns_odropped);
- m_freem(m0);
- return(EINVAL);
- }
-
- /*
- * Don't allow funny lengths on dst; src may be zero in which
- * case we insert the source address based upon the interface
- */
- if ((src->isoa_len > sizeof(struct iso_addr)) ||
- (dst->isoa_len == 0) ||
- (dst->isoa_len > sizeof(struct iso_addr))) {
- m_freem(m0);
- INCSTAT(cns_odropped);
- return(ENAMETOOLONG);
- }
-
- /*
- * Grab mbuf to contain header
- */
- MGETHDR(m, M_DONTWAIT, MT_HEADER);
- if (m == 0) {
- m_freem(m0);
- INCSTAT(cns_odropped);
- return(ENOBUFS);
- }
- INCSTAT(cns_sent);
- m->m_next = m0;
- clnp = mtod(m, struct clnp_fixed *);
- clcp->clc_segoff = 0;
-
- /*
- * Fill in all of fixed hdr except lengths and checksum
- */
- if (flags & CLNP_SEND_RAW) {
- *clnp = raw_template;
- } else if (flags & CLNP_ECHO) {
- *clnp = echo_template;
- } else if (flags & CLNP_ECHOR) {
- *clnp = echor_template;
- } else {
- *clnp = dt_template;
- }
- if (flags & CLNP_NO_SEG)
- clnp->cnf_type &= ~CNF_SEG_OK;
- if (flags & CLNP_NO_ER)
- clnp->cnf_type &= ~CNF_ERR_OK;
-
- /*
- * Route packet; special case for source rt
- */
- if ((isop->isop_options) && CLNPSRCRT_VALID(oidx)) {
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: calling clnp_srcroute\n");
- ENDDEBUG
- error = clnp_srcroute(isop->isop_options, oidx, &isop->isop_route,
- &clcp->clc_firsthop, &clcp->clc_ifa, dst);
- } else {
- IFDEBUG(D_OUTPUT)
- ENDDEBUG
- error = clnp_route(dst, &isop->isop_route, flags,
- &clcp->clc_firsthop, &clcp->clc_ifa);
- }
- if (error || (clcp->clc_ifa == 0)) {
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: route failed, errno %d\n", error);
- printf("@clcp:\n");
- dump_buf(clcp, sizeof (struct clnp_cache));
- ENDDEBUG
- goto bad;
- }
- clcp->clc_rt = isop->isop_route.ro_rt; /* XXX */
- clcp->clc_ifp = clcp->clc_ifa->ia_ifp; /* XXX */
-
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: packet routed to %s\n",
- clnp_iso_addrp(
- &((struct sockaddr_iso *)clcp->clc_firsthop)->siso_addr));
- ENDDEBUG
-
- /*
- * If src address is not yet specified, use address of
- * interface. NOTE: this will now update the laddr field in
- * the isopcb. Is this desirable? RAH?
- */
- if (src->isoa_len == 0) {
- src = &(clcp->clc_ifa->ia_addr.siso_addr);
- IFDEBUG(D_OUTPUT)
- printf("clnp_output: new src %s\n", clnp_iso_addrp(src));
- ENDDEBUG
- }
-
- /*
- * Insert the source and destination address,
- */
- hoff = (caddr_t)clnp + sizeof(struct clnp_fixed);
- CLNP_INSERT_ADDR(hoff, *dst);
- CLNP_INSERT_ADDR(hoff, *src);
-
- /*
- * Leave room for the segment part, if segmenting is selected
- */
- if (clnp->cnf_type & CNF_SEG_OK) {
- clcp->clc_segoff = hoff - (caddr_t)clnp;
- hoff += sizeof(struct clnp_segment);
- }
-
- clnp->cnf_hdr_len = m->m_len = (u_char)(hoff - (caddr_t)clnp);
- hdrlen = clnp->cnf_hdr_len;
-
-#ifdef DECBIT
- /*
- * Add the globally unique QOS (with room for congestion experienced
- * bit). I can safely assume that this option is not in the options
- * mbuf below because I checked that the option was not specified
- * previously
- */
- if ((m->m_len + sizeof(qos_option)) < MLEN) {
- bcopy((caddr_t)qos_option, hoff, sizeof(qos_option));
- clnp->cnf_hdr_len += sizeof(qos_option);
- hdrlen += sizeof(qos_option);
- m->m_len += sizeof(qos_option);
- }
-#endif /* DECBIT */
-
- /*
- * If an options mbuf is present, concatenate a copy to the hdr mbuf.
- */
- if (isop->isop_options) {
- struct mbuf *opt_copy = m_copy(isop->isop_options, 0, (int)M_COPYALL);
- if (opt_copy == NULL) {
- error = ENOBUFS;
- goto bad;
- }
- /* Link in place */
- opt_copy->m_next = m->m_next;
- m->m_next = opt_copy;
-
- /* update size of header */
- clnp->cnf_hdr_len += opt_copy->m_len;
- hdrlen += opt_copy->m_len;
- }
-
- if (hdrlen > CLNP_HDR_MAX) {
- error = EMSGSIZE;
- goto bad;
- }
-
- /*
- * Now set up the cache entry in the pcb
- */
- if ((flags & CLNP_NOCACHE) == 0) {
- if (clcp->clc_hdr = m_copy(m, 0, (int)clnp->cnf_hdr_len)) {
- clcp->clc_dst = *dst;
- clcp->clc_flags = flags;
- clcp->clc_options = isop->isop_options;
- }
- }
- }
- /*
- * If small enough for interface, send directly
- * Fill in segmentation part of hdr if using the full protocol
- */
- total_len = clnp->cnf_hdr_len + datalen;
- if (clnp->cnf_type & CNF_SEG_OK) {
- struct clnp_segment seg_part; /* segment part of hdr */
- seg_part.cng_id = htons(clnp_id++);
- seg_part.cng_off = htons(0);
- seg_part.cng_tot_len = htons(total_len);
- (void) bcopy((caddr_t)&seg_part, (caddr_t) clnp + clcp->clc_segoff,
- sizeof(seg_part));
- }
- if (total_len <= SN_MTU(clcp->clc_ifp, clcp->clc_rt)) {
- HTOC(clnp->cnf_seglen_msb, clnp->cnf_seglen_lsb, total_len);
- m->m_pkthdr.len = total_len;
- /*
- * Compute clnp checksum (on header only)
- */
- if (flags & CLNP_NO_CKSUM) {
- HTOC(clnp->cnf_cksum_msb, clnp->cnf_cksum_lsb, 0);
- } else {
- iso_gen_csum(m, CLNP_CKSUM_OFF, (int)clnp->cnf_hdr_len);
- }
-
- IFDEBUG(D_DUMPOUT)
- struct mbuf *mdump = m;
- printf("clnp_output: sending dg:\n");
- while (mdump != NULL) {
- dump_buf(mtod(mdump, caddr_t), mdump->m_len);
- mdump = mdump->m_next;
- }
- ENDDEBUG
-
- error = SN_OUTPUT(clcp, m);
- goto done;
- } else {
- /*
- * Too large for interface; fragment if possible.
- */
- error = clnp_fragment(clcp->clc_ifp, m, clcp->clc_firsthop,
- total_len, clcp->clc_segoff, flags, clcp->clc_rt);
- goto done;
- }
-bad:
- m_freem(m);
-done:
- if (error) {
- clnp_stat.cns_sent--;
- clnp_stat.cns_odropped++;
- }
- return (error);
-}
-
-int clnp_ctloutput()
-{
-}
projects / apple / xnu.git / blobdiff