- wrap mappedaddr block by #ifdef INET for IPv6-only kernel in future.
- rejects IPv6 packet toward IPv4-mapped address if its source address is not an IPv4-mapped IPv6 address, since the converted IPv4 packets would have an unexpected IPv4 source address. - when V6ONLY socket option is set, discard packets destined to a v4/ipv4 mapped ipv6 address. - have PULLDOWN_TEST codepath. - get rid of in6_mcmatch(). Obtained from: KAME
This commit is contained in:
Hajimu UMEMOTO
parent
efddf5c64d
commit
c46e7f1d52
@ -120,47 +120,22 @@
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*/
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extern struct protosw inetsw[];
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static int in6_mcmatch __P((struct inpcb *, struct in6_addr *, struct ifnet *));
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static int udp6_detach __P((struct socket *so));
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static int
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in6_mcmatch(in6p, ia6, ifp)
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struct inpcb *in6p;
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register struct in6_addr *ia6;
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struct ifnet *ifp;
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{
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struct ip6_moptions *im6o = in6p->in6p_moptions;
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struct in6_multi_mship *imm;
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if (im6o == NULL)
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return 0;
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for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
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imm = imm->i6mm_chain.le_next) {
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if ((ifp == NULL ||
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imm->i6mm_maddr->in6m_ifp == ifp) &&
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IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
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ia6))
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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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udp6_input(mp, offp, proto)
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struct mbuf **mp;
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int *offp, proto;
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{
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struct mbuf *m = *mp;
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struct mbuf *m = *mp, *opts;
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register struct ip6_hdr *ip6;
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register struct udphdr *uh;
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register struct inpcb *in6p;
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struct mbuf *opts = NULL;
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int off = *offp;
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int plen, ulen;
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struct sockaddr_in6 fromsa;
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IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
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opts = NULL;
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ip6 = mtod(m, struct ip6_hdr *);
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@ -170,10 +145,19 @@ udp6_input(mp, offp, proto)
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return IPPROTO_DONE;
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}
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#ifndef PULLDOWN_TEST
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IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
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ip6 = mtod(m, struct ip6_hdr *);
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uh = (struct udphdr *)((caddr_t)ip6 + off);
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#else
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IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh));
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if (!uh)
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return IPPROTO_DONE;
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#endif
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udpstat.udps_ipackets++;
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plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
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uh = (struct udphdr *)((caddr_t)ip6 + off);
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ulen = ntohs((u_short)uh->uh_ulen);
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if (plen != ulen) {
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@ -223,7 +207,7 @@ udp6_input(mp, offp, proto)
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/*
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* Construct sockaddr format source address.
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*/
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init_sin6(&fromsa, m); /* general init */
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init_sin6(&fromsa, m);
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fromsa.sin6_port = uh->uh_sport;
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/*
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* KAME note: traditionally we dropped udpiphdr from mbuf here.
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@ -242,9 +226,7 @@ udp6_input(mp, offp, proto)
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continue;
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if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
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if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
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&ip6->ip6_dst) &&
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!in6_mcmatch(in6p, &ip6->ip6_dst,
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m->m_pkthdr.rcvif))
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&ip6->ip6_dst))
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continue;
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}
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if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
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@ -401,15 +383,14 @@ udp6_input(mp, offp, proto)
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* Construct sockaddr format source address.
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* Stuff source address and datagram in user buffer.
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*/
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init_sin6(&fromsa, m); /* general init */
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init_sin6(&fromsa, m);
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fromsa.sin6_port = uh->uh_sport;
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if (in6p->in6p_flags & IN6P_CONTROLOPTS
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|| in6p->in6p_socket->so_options & SO_TIMESTAMP)
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ip6_savecontrol(in6p, m, &opts);
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m_adj(m, off + sizeof(struct udphdr));
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if (sbappendaddr(&in6p->in6p_socket->so_rcv,
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(struct sockaddr *)&fromsa,
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m, opts) == 0) {
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(struct sockaddr *)&fromsa, m, opts) == 0) {
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udpstat.udps_fullsock++;
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goto bad;
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}
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@ -692,12 +673,14 @@ udp6_disconnect(struct socket *so)
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if (inp == 0)
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return EINVAL;
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#ifdef INET
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if (inp->inp_vflag & INP_IPV4) {
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struct pr_usrreqs *pru;
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pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
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return ((*pru->pru_disconnect)(so));
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}
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#endif
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if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
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return ENOTCONN;
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@ -734,6 +717,7 @@ udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
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}
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}
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#ifdef INET
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if (!ip6_v6only) {
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int hasv4addr;
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struct sockaddr_in6 *sin6 = 0;
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@ -748,6 +732,25 @@ udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
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if (hasv4addr) {
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struct pr_usrreqs *pru;
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if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) {
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/*
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* since a user of this socket set the
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* IPV6_V6ONLY flag, we discard this
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* datagram destined to a v4 addr.
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*/
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return EINVAL;
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}
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if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
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!IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) {
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/*
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* when remote addr is IPv4-mapped
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* address, local addr should not be
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* an IPv6 address; since you cannot
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* determine how to map IPv6 source
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* address to IPv4.
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*/
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return EINVAL;
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}
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if (sin6)
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in6_sin6_2_sin_in_sock(addr);
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pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
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@ -757,6 +760,7 @@ udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
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return error;
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}
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}
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#endif
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return udp6_output(inp, m, addr, control, td);
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