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-rw-r--r--qemu/slirp/ip_input.c673
1 files changed, 0 insertions, 673 deletions
diff --git a/qemu/slirp/ip_input.c b/qemu/slirp/ip_input.c
deleted file mode 100644
index cdd54833a..000000000
--- a/qemu/slirp/ip_input.c
+++ /dev/null
@@ -1,673 +0,0 @@
-/*
- * Copyright (c) 1982, 1986, 1988, 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.
- *
- * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
- * ip_input.c,v 1.11 1994/11/16 10:17:08 jkh Exp
- */
-
-/*
- * Changes and additions relating to SLiRP are
- * Copyright (c) 1995 Danny Gasparovski.
- *
- * Please read the file COPYRIGHT for the
- * terms and conditions of the copyright.
- */
-
-#include "qemu/osdep.h"
-#include <slirp.h>
-#include <qemu/osdep.h>
-#include "ip_icmp.h"
-
-static struct ip *ip_reass(Slirp *slirp, struct ip *ip, struct ipq *fp);
-static void ip_freef(Slirp *slirp, struct ipq *fp);
-static void ip_enq(register struct ipasfrag *p,
- register struct ipasfrag *prev);
-static void ip_deq(register struct ipasfrag *p);
-
-/*
- * IP initialization: fill in IP protocol switch table.
- * All protocols not implemented in kernel go to raw IP protocol handler.
- */
-void
-ip_init(Slirp *slirp)
-{
- slirp->ipq.ip_link.next = slirp->ipq.ip_link.prev = &slirp->ipq.ip_link;
- udp_init(slirp);
- tcp_init(slirp);
- icmp_init(slirp);
-}
-
-void ip_cleanup(Slirp *slirp)
-{
- udp_cleanup(slirp);
- tcp_cleanup(slirp);
- icmp_cleanup(slirp);
-}
-
-/*
- * Ip input routine. Checksum and byte swap header. If fragmented
- * try to reassemble. Process options. Pass to next level.
- */
-void
-ip_input(struct mbuf *m)
-{
- Slirp *slirp = m->slirp;
- register struct ip *ip;
- int hlen;
-
- if (!slirp->in_enabled) {
- goto bad;
- }
-
- DEBUG_CALL("ip_input");
- DEBUG_ARG("m = %p", m);
- DEBUG_ARG("m_len = %d", m->m_len);
-
- if (m->m_len < sizeof (struct ip)) {
- goto bad;
- }
-
- ip = mtod(m, struct ip *);
-
- if (ip->ip_v != IPVERSION) {
- goto bad;
- }
-
- hlen = ip->ip_hl << 2;
- if (hlen<sizeof(struct ip ) || hlen>m->m_len) {/* min header length */
- goto bad; /* or packet too short */
- }
-
- /* keep ip header intact for ICMP reply
- * ip->ip_sum = cksum(m, hlen);
- * if (ip->ip_sum) {
- */
- if(cksum(m,hlen)) {
- goto bad;
- }
-
- /*
- * Convert fields to host representation.
- */
- NTOHS(ip->ip_len);
- if (ip->ip_len < hlen) {
- goto bad;
- }
- NTOHS(ip->ip_id);
- NTOHS(ip->ip_off);
-
- /*
- * Check that the amount of data in the buffers
- * is as at least much as the IP header would have us expect.
- * Trim mbufs if longer than we expect.
- * Drop packet if shorter than we expect.
- */
- if (m->m_len < ip->ip_len) {
- goto bad;
- }
-
- /* Should drop packet if mbuf too long? hmmm... */
- if (m->m_len > ip->ip_len)
- m_adj(m, ip->ip_len - m->m_len);
-
- /* check ip_ttl for a correct ICMP reply */
- if (ip->ip_ttl == 0) {
- icmp_send_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, 0, "ttl");
- goto bad;
- }
-
- /*
- * If offset or IP_MF are set, must reassemble.
- * Otherwise, nothing need be done.
- * (We could look in the reassembly queue to see
- * if the packet was previously fragmented,
- * but it's not worth the time; just let them time out.)
- *
- * XXX This should fail, don't fragment yet
- */
- if (ip->ip_off &~ IP_DF) {
- register struct ipq *fp;
- struct qlink *l;
- /*
- * Look for queue of fragments
- * of this datagram.
- */
- for (l = slirp->ipq.ip_link.next; l != &slirp->ipq.ip_link;
- l = l->next) {
- fp = container_of(l, struct ipq, ip_link);
- if (ip->ip_id == fp->ipq_id &&
- ip->ip_src.s_addr == fp->ipq_src.s_addr &&
- ip->ip_dst.s_addr == fp->ipq_dst.s_addr &&
- ip->ip_p == fp->ipq_p)
- goto found;
- }
- fp = NULL;
- found:
-
- /*
- * Adjust ip_len to not reflect header,
- * set ip_mff if more fragments are expected,
- * convert offset of this to bytes.
- */
- ip->ip_len -= hlen;
- if (ip->ip_off & IP_MF)
- ip->ip_tos |= 1;
- else
- ip->ip_tos &= ~1;
-
- ip->ip_off <<= 3;
-
- /*
- * If datagram marked as having more fragments
- * or if this is not the first fragment,
- * attempt reassembly; if it succeeds, proceed.
- */
- if (ip->ip_tos & 1 || ip->ip_off) {
- ip = ip_reass(slirp, ip, fp);
- if (ip == NULL)
- return;
- m = dtom(slirp, ip);
- } else
- if (fp)
- ip_freef(slirp, fp);
-
- } else
- ip->ip_len -= hlen;
-
- /*
- * Switch out to protocol's input routine.
- */
- switch (ip->ip_p) {
- case IPPROTO_TCP:
- tcp_input(m, hlen, (struct socket *)NULL, AF_INET);
- break;
- case IPPROTO_UDP:
- udp_input(m, hlen);
- break;
- case IPPROTO_ICMP:
- icmp_input(m, hlen);
- break;
- default:
- m_free(m);
- }
- return;
-bad:
- m_free(m);
-}
-
-#define iptofrag(P) ((struct ipasfrag *)(((char*)(P)) - sizeof(struct qlink)))
-#define fragtoip(P) ((struct ip*)(((char*)(P)) + sizeof(struct qlink)))
-/*
- * Take incoming datagram fragment and try to
- * reassemble it into whole datagram. If a chain for
- * reassembly of this datagram already exists, then it
- * is given as fp; otherwise have to make a chain.
- */
-static struct ip *
-ip_reass(Slirp *slirp, struct ip *ip, struct ipq *fp)
-{
- register struct mbuf *m = dtom(slirp, ip);
- register struct ipasfrag *q;
- int hlen = ip->ip_hl << 2;
- int i, next;
-
- DEBUG_CALL("ip_reass");
- DEBUG_ARG("ip = %p", ip);
- DEBUG_ARG("fp = %p", fp);
- DEBUG_ARG("m = %p", m);
-
- /*
- * Presence of header sizes in mbufs
- * would confuse code below.
- * Fragment m_data is concatenated.
- */
- m->m_data += hlen;
- m->m_len -= hlen;
-
- /*
- * If first fragment to arrive, create a reassembly queue.
- */
- if (fp == NULL) {
- struct mbuf *t = m_get(slirp);
-
- if (t == NULL) {
- goto dropfrag;
- }
- fp = mtod(t, struct ipq *);
- insque(&fp->ip_link, &slirp->ipq.ip_link);
- fp->ipq_ttl = IPFRAGTTL;
- fp->ipq_p = ip->ip_p;
- fp->ipq_id = ip->ip_id;
- fp->frag_link.next = fp->frag_link.prev = &fp->frag_link;
- fp->ipq_src = ip->ip_src;
- fp->ipq_dst = ip->ip_dst;
- q = (struct ipasfrag *)fp;
- goto insert;
- }
-
- /*
- * Find a segment which begins after this one does.
- */
- for (q = fp->frag_link.next; q != (struct ipasfrag *)&fp->frag_link;
- q = q->ipf_next)
- if (q->ipf_off > ip->ip_off)
- break;
-
- /*
- * If there is a preceding segment, it may provide some of
- * our data already. If so, drop the data from the incoming
- * segment. If it provides all of our data, drop us.
- */
- if (q->ipf_prev != &fp->frag_link) {
- struct ipasfrag *pq = q->ipf_prev;
- i = pq->ipf_off + pq->ipf_len - ip->ip_off;
- if (i > 0) {
- if (i >= ip->ip_len)
- goto dropfrag;
- m_adj(dtom(slirp, ip), i);
- ip->ip_off += i;
- ip->ip_len -= i;
- }
- }
-
- /*
- * While we overlap succeeding segments trim them or,
- * if they are completely covered, dequeue them.
- */
- while (q != (struct ipasfrag*)&fp->frag_link &&
- ip->ip_off + ip->ip_len > q->ipf_off) {
- i = (ip->ip_off + ip->ip_len) - q->ipf_off;
- if (i < q->ipf_len) {
- q->ipf_len -= i;
- q->ipf_off += i;
- m_adj(dtom(slirp, q), i);
- break;
- }
- q = q->ipf_next;
- m_free(dtom(slirp, q->ipf_prev));
- ip_deq(q->ipf_prev);
- }
-
-insert:
- /*
- * Stick new segment in its place;
- * check for complete reassembly.
- */
- ip_enq(iptofrag(ip), q->ipf_prev);
- next = 0;
- for (q = fp->frag_link.next; q != (struct ipasfrag*)&fp->frag_link;
- q = q->ipf_next) {
- if (q->ipf_off != next)
- return NULL;
- next += q->ipf_len;
- }
- if (((struct ipasfrag *)(q->ipf_prev))->ipf_tos & 1)
- return NULL;
-
- /*
- * Reassembly is complete; concatenate fragments.
- */
- q = fp->frag_link.next;
- m = dtom(slirp, q);
-
- q = (struct ipasfrag *) q->ipf_next;
- while (q != (struct ipasfrag*)&fp->frag_link) {
- struct mbuf *t = dtom(slirp, q);
- q = (struct ipasfrag *) q->ipf_next;
- m_cat(m, t);
- }
-
- /*
- * Create header for new ip packet by
- * modifying header of first packet;
- * dequeue and discard fragment reassembly header.
- * Make header visible.
- */
- q = fp->frag_link.next;
-
- /*
- * If the fragments concatenated to an mbuf that's
- * bigger than the total size of the fragment, then and
- * m_ext buffer was alloced. But fp->ipq_next points to
- * the old buffer (in the mbuf), so we must point ip
- * into the new buffer.
- */
- if (m->m_flags & M_EXT) {
- int delta = (char *)q - m->m_dat;
- q = (struct ipasfrag *)(m->m_ext + delta);
- }
-
- ip = fragtoip(q);
- ip->ip_len = next;
- ip->ip_tos &= ~1;
- ip->ip_src = fp->ipq_src;
- ip->ip_dst = fp->ipq_dst;
- remque(&fp->ip_link);
- (void) m_free(dtom(slirp, fp));
- m->m_len += (ip->ip_hl << 2);
- m->m_data -= (ip->ip_hl << 2);
-
- return ip;
-
-dropfrag:
- m_free(m);
- return NULL;
-}
-
-/*
- * Free a fragment reassembly header and all
- * associated datagrams.
- */
-static void
-ip_freef(Slirp *slirp, struct ipq *fp)
-{
- register struct ipasfrag *q, *p;
-
- for (q = fp->frag_link.next; q != (struct ipasfrag*)&fp->frag_link; q = p) {
- p = q->ipf_next;
- ip_deq(q);
- m_free(dtom(slirp, q));
- }
- remque(&fp->ip_link);
- (void) m_free(dtom(slirp, fp));
-}
-
-/*
- * Put an ip fragment on a reassembly chain.
- * Like insque, but pointers in middle of structure.
- */
-static void
-ip_enq(register struct ipasfrag *p, register struct ipasfrag *prev)
-{
- DEBUG_CALL("ip_enq");
- DEBUG_ARG("prev = %p", prev);
- p->ipf_prev = prev;
- p->ipf_next = prev->ipf_next;
- ((struct ipasfrag *)(prev->ipf_next))->ipf_prev = p;
- prev->ipf_next = p;
-}
-
-/*
- * To ip_enq as remque is to insque.
- */
-static void
-ip_deq(register struct ipasfrag *p)
-{
- ((struct ipasfrag *)(p->ipf_prev))->ipf_next = p->ipf_next;
- ((struct ipasfrag *)(p->ipf_next))->ipf_prev = p->ipf_prev;
-}
-
-/*
- * IP timer processing;
- * if a timer expires on a reassembly
- * queue, discard it.
- */
-void
-ip_slowtimo(Slirp *slirp)
-{
- struct qlink *l;
-
- DEBUG_CALL("ip_slowtimo");
-
- l = slirp->ipq.ip_link.next;
-
- if (l == NULL)
- return;
-
- while (l != &slirp->ipq.ip_link) {
- struct ipq *fp = container_of(l, struct ipq, ip_link);
- l = l->next;
- if (--fp->ipq_ttl == 0) {
- ip_freef(slirp, fp);
- }
- }
-}
-
-/*
- * Do option processing on a datagram,
- * possibly discarding it if bad options are encountered,
- * or forwarding it if source-routed.
- * Returns 1 if packet has been forwarded/freed,
- * 0 if the packet should be processed further.
- */
-
-#ifdef notdef
-
-int
-ip_dooptions(m)
- struct mbuf *m;
-{
- register struct ip *ip = mtod(m, struct ip *);
- register u_char *cp;
- register struct ip_timestamp *ipt;
- register struct in_ifaddr *ia;
- int opt, optlen, cnt, off, code, type, forward = 0;
- struct in_addr *sin, dst;
-typedef uint32_t n_time;
- n_time ntime;
-
- dst = ip->ip_dst;
- cp = (u_char *)(ip + 1);
- cnt = (ip->ip_hl << 2) - sizeof (struct ip);
- for (; cnt > 0; cnt -= optlen, cp += optlen) {
- opt = cp[IPOPT_OPTVAL];
- if (opt == IPOPT_EOL)
- break;
- if (opt == IPOPT_NOP)
- optlen = 1;
- else {
- optlen = cp[IPOPT_OLEN];
- if (optlen <= 0 || optlen > cnt) {
- code = &cp[IPOPT_OLEN] - (u_char *)ip;
- goto bad;
- }
- }
- switch (opt) {
-
- default:
- break;
-
- /*
- * Source routing with record.
- * Find interface with current destination address.
- * If none on this machine then drop if strictly routed,
- * or do nothing if loosely routed.
- * Record interface address and bring up next address
- * component. If strictly routed make sure next
- * address is on directly accessible net.
- */
- case IPOPT_LSRR:
- case IPOPT_SSRR:
- if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) {
- code = &cp[IPOPT_OFFSET] - (u_char *)ip;
- goto bad;
- }
- ipaddr.sin_addr = ip->ip_dst;
- ia = (struct in_ifaddr *)
- ifa_ifwithaddr((struct sockaddr *)&ipaddr);
- if (ia == 0) {
- if (opt == IPOPT_SSRR) {
- type = ICMP_UNREACH;
- code = ICMP_UNREACH_SRCFAIL;
- goto bad;
- }
- /*
- * Loose routing, and not at next destination
- * yet; nothing to do except forward.
- */
- break;
- }
- off--; /* 0 origin */
- if (off > optlen - sizeof(struct in_addr)) {
- /*
- * End of source route. Should be for us.
- */
- save_rte(cp, ip->ip_src);
- break;
- }
- /*
- * locate outgoing interface
- */
- bcopy((caddr_t)(cp + off), (caddr_t)&ipaddr.sin_addr,
- sizeof(ipaddr.sin_addr));
- if (opt == IPOPT_SSRR) {
-#define INA struct in_ifaddr *
-#define SA struct sockaddr *
- if ((ia = (INA)ifa_ifwithdstaddr((SA)&ipaddr)) == 0)
- ia = (INA)ifa_ifwithnet((SA)&ipaddr);
- } else
- ia = ip_rtaddr(ipaddr.sin_addr);
- if (ia == 0) {
- type = ICMP_UNREACH;
- code = ICMP_UNREACH_SRCFAIL;
- goto bad;
- }
- ip->ip_dst = ipaddr.sin_addr;
- bcopy((caddr_t)&(IA_SIN(ia)->sin_addr),
- (caddr_t)(cp + off), sizeof(struct in_addr));
- cp[IPOPT_OFFSET] += sizeof(struct in_addr);
- /*
- * Let ip_intr's mcast routing check handle mcast pkts
- */
- forward = !IN_MULTICAST(ntohl(ip->ip_dst.s_addr));
- break;
-
- case IPOPT_RR:
- if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) {
- code = &cp[IPOPT_OFFSET] - (u_char *)ip;
- goto bad;
- }
- /*
- * If no space remains, ignore.
- */
- off--; /* 0 origin */
- if (off > optlen - sizeof(struct in_addr))
- break;
- bcopy((caddr_t)(&ip->ip_dst), (caddr_t)&ipaddr.sin_addr,
- sizeof(ipaddr.sin_addr));
- /*
- * locate outgoing interface; if we're the destination,
- * use the incoming interface (should be same).
- */
- if ((ia = (INA)ifa_ifwithaddr((SA)&ipaddr)) == 0 &&
- (ia = ip_rtaddr(ipaddr.sin_addr)) == 0) {
- type = ICMP_UNREACH;
- code = ICMP_UNREACH_HOST;
- goto bad;
- }
- bcopy((caddr_t)&(IA_SIN(ia)->sin_addr),
- (caddr_t)(cp + off), sizeof(struct in_addr));
- cp[IPOPT_OFFSET] += sizeof(struct in_addr);
- break;
-
- case IPOPT_TS:
- code = cp - (u_char *)ip;
- ipt = (struct ip_timestamp *)cp;
- if (ipt->ipt_len < 5)
- goto bad;
- if (ipt->ipt_ptr > ipt->ipt_len - sizeof (int32_t)) {
- if (++ipt->ipt_oflw == 0)
- goto bad;
- break;
- }
- sin = (struct in_addr *)(cp + ipt->ipt_ptr - 1);
- switch (ipt->ipt_flg) {
-
- case IPOPT_TS_TSONLY:
- break;
-
- case IPOPT_TS_TSANDADDR:
- if (ipt->ipt_ptr + sizeof(n_time) +
- sizeof(struct in_addr) > ipt->ipt_len)
- goto bad;
- ipaddr.sin_addr = dst;
- ia = (INA)ifaof_ i f p foraddr((SA)&ipaddr,
- m->m_pkthdr.rcvif);
- if (ia == 0)
- continue;
- bcopy((caddr_t)&IA_SIN(ia)->sin_addr,
- (caddr_t)sin, sizeof(struct in_addr));
- ipt->ipt_ptr += sizeof(struct in_addr);
- break;
-
- case IPOPT_TS_PRESPEC:
- if (ipt->ipt_ptr + sizeof(n_time) +
- sizeof(struct in_addr) > ipt->ipt_len)
- goto bad;
- bcopy((caddr_t)sin, (caddr_t)&ipaddr.sin_addr,
- sizeof(struct in_addr));
- if (ifa_ifwithaddr((SA)&ipaddr) == 0)
- continue;
- ipt->ipt_ptr += sizeof(struct in_addr);
- break;
-
- default:
- goto bad;
- }
- ntime = iptime();
- bcopy((caddr_t)&ntime, (caddr_t)cp + ipt->ipt_ptr - 1,
- sizeof(n_time));
- ipt->ipt_ptr += sizeof(n_time);
- }
- }
- if (forward) {
- ip_forward(m, 1);
- return (1);
- }
- return (0);
-bad:
- icmp_send_error(m, type, code, 0, 0);
-
- return (1);
-}
-
-#endif /* notdef */
-
-/*
- * Strip out IP options, at higher
- * level protocol in the kernel.
- * Second argument is buffer to which options
- * will be moved, and return value is their length.
- * (XXX) should be deleted; last arg currently ignored.
- */
-void
-ip_stripoptions(register struct mbuf *m, struct mbuf *mopt)
-{
- register int i;
- struct ip *ip = mtod(m, struct ip *);
- register caddr_t opts;
- int olen;
-
- olen = (ip->ip_hl<<2) - sizeof (struct ip);
- opts = (caddr_t)(ip + 1);
- i = m->m_len - (sizeof (struct ip) + olen);
- memcpy(opts, opts + olen, (unsigned)i);
- m->m_len -= olen;
-
- ip->ip_hl = sizeof(struct ip) >> 2;
-}