Differential D33022 Diff 98727 sys/netinet6/udp6_usrreq.c

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sys/netinet6/udp6_usrreq.c

Show First 20 Lines • Show All 201 Lines • ▼ Show 20 Lines	if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)&fromsa[0], n,
if (opts)		if (opts)
m_freem(opts);		m_freem(opts);
UDPSTAT_INC(udps_fullsock);		UDPSTAT_INC(udps_fullsock);
} else		} else
sorwakeup_locked(so);		sorwakeup_locked(so);
return (0);		return (0);
}		}

		struct udp6_multi_match_ctx {
		struct ip6_hdr *ip6;
		struct udphdr *uh;
		};

		static bool
		udp6_multi_match(const struct inpcb inp, void v)
		{
		struct udp6_multi_match_ctx *ctx = v;

		if ((inp->inp_vflag & INP_IPV6) == 0)
		return(false);
		if (inp->inp_lport != ctx->uh->uh_dport)
		return(false);
		if (inp->inp_fport != 0 && inp->inp_fport != ctx->uh->uh_sport)
		return(false);
		if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) &&
		!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ctx->ip6->ip6_dst))
		return (false);
		if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) &&
		(!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ctx->ip6->ip6_src) \|\|
		inp->inp_fport != ctx->uh->uh_sport))
		return (false);

		return (true);
		}

		static int
		udp6_multi_input(struct mbuf *m, int off, int proto,
		struct sockaddr_in6 *fromsa)
		{
		struct udp6_multi_match_ctx ctx;
		struct inpcb_iterator inpi = INP_ITERATOR(udp_get_inpcbinfo(proto),
		INPLOOKUP_RLOCKPCB, udp6_multi_match, &ctx);
		struct inpcb *inp;
		struct ip6_moptions *imo;
		struct mbuf *n;
		int appends = 0;

		/*
		* In the event that laddr should be set to the link-local
		* address (this happens in RIPng), the multicast address
		* specified in the received packet will not match laddr. To
		* handle this situation, matching is relaxed if the
		* receiving interface is the same as one specified in the
		* socket and if the destination multicast address matches
		* one of the multicast groups specified in the socket.
		*/

		/*
		* KAME note: traditionally we dropped udpiphdr from mbuf
		* here. We need udphdr for IPsec processing so we do that
		* later.
		*/
		ctx.ip6 = mtod(m, struct ip6_hdr *);
		ctx.uh = (struct udphdr )((char )ctx.ip6 + off);
		while ((inp = inp_next(&inpi)) != NULL) {
		INP_RLOCK_ASSERT(inp);
		/*
		* XXXRW: Because we weren't holding either the inpcb
		* or the hash lock when we checked for a match
		* before, we should probably recheck now that the
		* inpcb lock is (supposed to be) held.
		*/
		/*
		* Handle socket delivery policy for any-source
		* and source-specific multicast. [RFC3678]
		*/
		if ((imo = inp->in6p_moptions) != NULL) {
		struct sockaddr_in6 mcaddr;
		int blocked;

		bzero(&mcaddr, sizeof(struct sockaddr_in6));
		mcaddr.sin6_len = sizeof(struct sockaddr_in6);
		mcaddr.sin6_family = AF_INET6;
		mcaddr.sin6_addr = ctx.ip6->ip6_dst;

		blocked = im6o_mc_filter(imo, m->m_pkthdr.rcvif,
		(struct sockaddr *)&mcaddr,
		(struct sockaddr *)&fromsa[0]);
		if (blocked != MCAST_PASS) {
		if (blocked == MCAST_NOTGMEMBER)
		IP6STAT_INC(ip6s_notmember);
		if (blocked == MCAST_NOTSMEMBER \|\|
		blocked == MCAST_MUTED)
		UDPSTAT_INC(udps_filtermcast);
		continue;
		}
		}
		if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) != NULL) {
		if (proto == IPPROTO_UDPLITE)
		UDPLITE_PROBE(receive, NULL, inp, ctx.ip6,
		inp, ctx.uh);
		else
		UDP_PROBE(receive, NULL, inp, ctx.ip6, inp,
		ctx.uh);
		if (udp6_append(inp, n, off, fromsa)) {
		INP_RUNLOCK(inp);
		break;
		} else
		appends++;
		}
		/*
		* Don't look for additional matches if this one does
		* not have either the SO_REUSEPORT or SO_REUSEADDR
		* socket options set. This heuristic avoids
		* searching through all pcbs in the common case of a
		* non-shared port. It assumes that an application
		* will never clear these options after setting them.
		*/
		if ((inp->inp_socket->so_options &
		(SO_REUSEPORT\|SO_REUSEPORT_LB\|SO_REUSEADDR)) == 0) {
		INP_RUNLOCK(inp);
		break;
		}
		}
		m_freem(m);

		if (appends == 0) {
		/*
		* No matching pcb found; discard datagram. (No need
		* to send an ICMP Port Unreachable for a broadcast
		* or multicast datgram.)
		*/
		UDPSTAT_INC(udps_noport);
		UDPSTAT_INC(udps_noportmcast);
		}

		return (IPPROTO_DONE);
		}

int		int
udp6_input(struct mbuf *mp, int offp, int proto)		udp6_input(struct mbuf *mp, int offp, int proto)
{		{
struct mbuf m = mp;		struct mbuf m = mp;
struct ifnet *ifp;		struct ifnet *ifp;
struct ip6_hdr *ip6;		struct ip6_hdr *ip6;
struct udphdr *uh;		struct udphdr *uh;
struct inpcb *inp;		struct inpcb *inp;
▲ Show 20 Lines • Show All 88 Lines • ▼ Show 20 Lines	skip_checksum:
* Construct sockaddr format source address.		* Construct sockaddr format source address.
*/		*/
init_sin6(&fromsa[0], m, 0);		init_sin6(&fromsa[0], m, 0);
fromsa[0].sin6_port = uh->uh_sport;		fromsa[0].sin6_port = uh->uh_sport;
init_sin6(&fromsa[1], m, 1);		init_sin6(&fromsa[1], m, 1);
fromsa[1].sin6_port = uh->uh_dport;		fromsa[1].sin6_port = uh->uh_dport;

pcbinfo = udp_get_inpcbinfo(nxt);		pcbinfo = udp_get_inpcbinfo(nxt);
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {		if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
struct inpcb *last;		*mp = NULL;
struct inpcbhead *pcblist;		return (udp6_multi_input(m, off, proto, fromsa));
struct ip6_moptions *imo;

/*
* In the event that laddr should be set to the link-local
* address (this happens in RIPng), the multicast address
* specified in the received packet will not match laddr. To
* handle this situation, matching is relaxed if the
* receiving interface is the same as one specified in the
* socket and if the destination multicast address matches
* one of the multicast groups specified in the socket.
*/

/*
* KAME note: traditionally we dropped udpiphdr from mbuf
* here. We need udphdr for IPsec processing so we do that
* later.
*/
pcblist = udp_get_pcblist(nxt);
last = NULL;
CK_LIST_FOREACH(inp, pcblist, inp_list) {
if ((inp->inp_vflag & INP_IPV6) == 0)
continue;
if (inp->inp_lport != uh->uh_dport)
continue;
if (inp->inp_fport != 0 &&
inp->inp_fport != uh->uh_sport)
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr,
&ip6->ip6_dst))
continue;
}		}
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr,
&ip6->ip6_src) \|\|
inp->inp_fport != uh->uh_sport)
continue;
}

INP_RLOCK(inp);

if (__predict_false(inp->inp_flags2 & INP_FREED)) {
INP_RUNLOCK(inp);
continue;
}

/*		/*
* XXXRW: Because we weren't holding either the inpcb
* or the hash lock when we checked for a match
* before, we should probably recheck now that the
* inpcb lock is (supposed to be) held.
*/

/*
* Handle socket delivery policy for any-source
* and source-specific multicast. [RFC3678]
*/
imo = inp->in6p_moptions;
if (imo != NULL) {
struct sockaddr_in6 mcaddr;
int blocked;

bzero(&mcaddr, sizeof(struct sockaddr_in6));
mcaddr.sin6_len = sizeof(struct sockaddr_in6);
mcaddr.sin6_family = AF_INET6;
mcaddr.sin6_addr = ip6->ip6_dst;

blocked = im6o_mc_filter(imo, ifp,
(struct sockaddr *)&mcaddr,
(struct sockaddr *)&fromsa[0]);
if (blocked != MCAST_PASS) {
if (blocked == MCAST_NOTGMEMBER)
IP6STAT_INC(ip6s_notmember);
if (blocked == MCAST_NOTSMEMBER \|\|
blocked == MCAST_MUTED)
UDPSTAT_INC(udps_filtermcast);
INP_RUNLOCK(inp);
continue;
}
}

if (last != NULL) {
struct mbuf *n;

if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) !=
NULL) {
if (nxt == IPPROTO_UDPLITE)
UDPLITE_PROBE(receive, NULL,
last, ip6, last, uh);
else
UDP_PROBE(receive, NULL, last,
ip6, last, uh);
if (udp6_append(last, n, off,
fromsa)) {
INP_RUNLOCK(inp);
goto badunlocked;
}
}
/* Release PCB lock taken on previous pass. */
INP_RUNLOCK(last);
}
last = inp;
/*
* Don't look for additional matches if this one does
* not have either the SO_REUSEPORT or SO_REUSEADDR
* socket options set. This heuristic avoids
* searching through all pcbs in the common case of a
* non-shared port. It assumes that an application
* will never clear these options after setting them.
*/
if ((last->inp_socket->so_options &
(SO_REUSEPORT\|SO_REUSEPORT_LB\|SO_REUSEADDR)) == 0)
break;
}

if (last == NULL) {
/*
* No matching pcb found; discard datagram. (No need
* to send an ICMP Port Unreachable for a broadcast
* or multicast datgram.)
*/
UDPSTAT_INC(udps_noport);
UDPSTAT_INC(udps_noportmcast);
goto badunlocked;
}

if (nxt == IPPROTO_UDPLITE)
UDPLITE_PROBE(receive, NULL, last, ip6, last, uh);
else
UDP_PROBE(receive, NULL, last, ip6, last, uh);
if (udp6_append(last, m, off, fromsa) == 0)
INP_RUNLOCK(last);
*mp = NULL;
return (IPPROTO_DONE);
}
/*
* Locate pcb for datagram.		* Locate pcb for datagram.
*/		*/

/*		/*
* Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.		* Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
*/		*/
if ((m->m_flags & M_IP6_NEXTHOP) &&		if ((m->m_flags & M_IP6_NEXTHOP) &&
(fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {		(fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
▲ Show 20 Lines • Show All 577 Lines • ▼ Show 20 Lines	udp6_attach(struct socket so, int proto, struct thread td)
inp = sotoinpcb(so);		inp = sotoinpcb(so);
KASSERT(inp == NULL, ("udp6_attach: inp != NULL"));		KASSERT(inp == NULL, ("udp6_attach: inp != NULL"));

if (so->so_snd.sb_hiwat == 0 \|\| so->so_rcv.sb_hiwat == 0) {		if (so->so_snd.sb_hiwat == 0 \|\| so->so_rcv.sb_hiwat == 0) {
error = soreserve(so, udp_sendspace, udp_recvspace);		error = soreserve(so, udp_sendspace, udp_recvspace);
if (error)		if (error)
return (error);		return (error);
}		}
INP_INFO_WLOCK(pcbinfo);
error = in_pcballoc(so, pcbinfo);		error = in_pcballoc(so, pcbinfo);
if (error) {		if (error)
INP_INFO_WUNLOCK(pcbinfo);
return (error);		return (error);
}
inp = (struct inpcb *)so->so_pcb;		inp = (struct inpcb *)so->so_pcb;
inp->inp_vflag \|= INP_IPV6;		inp->inp_vflag \|= INP_IPV6;
if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0)		if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0)
inp->inp_vflag \|= INP_IPV4;		inp->inp_vflag \|= INP_IPV4;
inp->in6p_hops = -1; /* use kernel default */		inp->in6p_hops = -1; /* use kernel default */
inp->in6p_cksum = -1; /* just to be sure */		inp->in6p_cksum = -1; /* just to be sure */
/*		/*
* XXX: ugly!!		* XXX: ugly!!
* IPv4 TTL initialization is necessary for an IPv6 socket as well,		* IPv4 TTL initialization is necessary for an IPv6 socket as well,
* because the socket may be bound to an IPv6 wildcard address,		* because the socket may be bound to an IPv6 wildcard address,
* which may match an IPv4-mapped IPv6 address.		* which may match an IPv4-mapped IPv6 address.
*/		*/
inp->inp_ip_ttl = V_ip_defttl;		inp->inp_ip_ttl = V_ip_defttl;

error = udp_newudpcb(inp);		error = udp_newudpcb(inp);
if (error) {		if (error) {
in_pcbdetach(inp);		in_pcbdetach(inp);
in_pcbfree(inp);		in_pcbfree(inp);
INP_INFO_WUNLOCK(pcbinfo);
return (error);		return (error);
}		}
INP_WUNLOCK(inp);		INP_WUNLOCK(inp);
INP_INFO_WUNLOCK(pcbinfo);
return (0);		return (0);
}		}

static int		static int
udp6_bind(struct socket so, struct sockaddr nam, struct thread *td)		udp6_bind(struct socket so, struct sockaddr nam, struct thread *td)
{		{
struct inpcb *inp;		struct inpcb *inp;
struct inpcbinfo *pcbinfo;		struct inpcbinfo *pcbinfo;
▲ Show 20 Lines • Show All 187 Lines • ▼ Show 20 Lines	udp6_detach(struct socket *so)
struct inpcb *inp;		struct inpcb *inp;
struct inpcbinfo *pcbinfo;		struct inpcbinfo *pcbinfo;
struct udpcb *up;		struct udpcb *up;

pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);		pcbinfo = udp_get_inpcbinfo(so->so_proto->pr_protocol);
inp = sotoinpcb(so);		inp = sotoinpcb(so);
KASSERT(inp != NULL, ("udp6_detach: inp == NULL"));		KASSERT(inp != NULL, ("udp6_detach: inp == NULL"));

INP_INFO_WLOCK(pcbinfo);
INP_WLOCK(inp);		INP_WLOCK(inp);
up = intoudpcb(inp);		up = intoudpcb(inp);
KASSERT(up != NULL, ("%s: up == NULL", __func__));		KASSERT(up != NULL, ("%s: up == NULL", __func__));
in_pcbdetach(inp);		in_pcbdetach(inp);
in_pcbfree(inp);		in_pcbfree(inp);
INP_INFO_WUNLOCK(pcbinfo);
udp_discardcb(up);		udp_discardcb(up);
}		}

static int		static int
udp6_disconnect(struct socket *so)		udp6_disconnect(struct socket *so)
{		{
struct inpcb *inp;		struct inpcb *inp;
struct inpcbinfo *pcbinfo;		struct inpcbinfo *pcbinfo;
▲ Show 20 Lines • Show All 79 Lines • Show Last 20 Lines