/*
* Append address and data, and optionally, control (ancillary) data to the
* receive queue of a socket. If present, m0 must include a packet header
* with total length. Returns 0 if no space in sockbuf or insufficient
* mbufs.
*/
int
sbappendaddr(struct sockbuf *sb, const struct sockaddr *asa,
struct mbuf *m0, struct mbuf *control)
{
int retval;
SOCKBUF_LOCK(sb);
retval = sbappendaddr_locked(sb, asa, m0, control);
SOCKBUF_UNLOCK(sb);
return (retval);
}
static int
udp6_append(struct inpcb *inp, struct mbuf *n, int off,
struct sockaddr_in6 *fromsa)
{
struct socket *so;
struct mbuf *opts;
struct udpcb *up;
INP_LOCK_ASSERT(inp);
/*
* Engage the tunneling protocol.
*/
up = intoudpcb(inp);
if (up->u_tun_func != NULL) {
in_pcbref(inp);
INP_RUNLOCK(inp);
(*up->u_tun_func)(n, off, inp, (struct sockaddr *)fromsa,
up->u_tun_ctx);
INP_RLOCK(inp);
return (in_pcbrele_rlocked(inp));
}
#ifdef IPSEC
/* Check AH/ESP integrity. */
if (ipsec6_in_reject(n, inp)) {
m_freem(n);
return (0);
}
#endif /* IPSEC */
#ifdef MAC
if (mac_inpcb_check_deliver(inp, n) != 0) {
m_freem(n);
return (0);
}
#endif
opts = NULL;
if (inp->inp_flags & INP_CONTROLOPTS ||
inp->inp_socket->so_options & SO_TIMESTAMP)
ip6_savecontrol(inp, n, &opts);
m_adj(n, off + sizeof(struct udphdr));
so = inp->inp_socket;
SOCKBUF_LOCK(&so->so_rcv);
if (sbappendaddr_locked(&so->so_rcv, (struct sockaddr *)fromsa, n,
opts) == 0) {
SOCKBUF_UNLOCK(&so->so_rcv);
m_freem(n);
if (opts)
m_freem(opts);
UDPSTAT_INC(udps_fullsock);
} else
sorwakeup_locked(so);
return (0);
}
/*
* Send a SeND message to user space, that was either received and has to be
* validated or was about to be send out and has to be handled by the SEND
* daemon adding SeND ICMPv6 options.
*/
static int
send_input(struct mbuf *m, struct ifnet *ifp, int direction, int msglen __unused)
{
struct ip6_hdr *ip6;
struct sockaddr_send sendsrc;
SEND_LOCK();
if (V_send_so == NULL) {
SEND_UNLOCK();
return (-1);
}
/*
* Make sure to clear any possible internally embedded scope before
* passing the packet to user space for SeND cryptographic signature
* validation to succeed.
*/
ip6 = mtod(m, struct ip6_hdr *);
in6_clearscope(&ip6->ip6_src);
in6_clearscope(&ip6->ip6_dst);
bzero(&sendsrc, sizeof(sendsrc));
sendsrc.send_len = sizeof(sendsrc);
sendsrc.send_family = AF_INET6;
sendsrc.send_direction = direction;
sendsrc.send_ifidx = ifp->if_index;
/*
* Send incoming or outgoing traffic to user space either to be
* protected (outgoing) or validated (incoming) according to rfc3971.
*/
SOCKBUF_LOCK(&V_send_so->so_rcv);
if (sbappendaddr_locked(&V_send_so->so_rcv,
(struct sockaddr *)&sendsrc, m, NULL) == 0) {
SOCKBUF_UNLOCK(&V_send_so->so_rcv);
/* XXX stats. */
m_freem(m);
} else {
sorwakeup_locked(V_send_so);
}
SEND_UNLOCK();
return (0);
}
/*
* Subroutine of udp_input(), which appends the provided mbuf chain to the
* passed pcb/socket. The caller must provide a sockaddr_in via udp_in that
* contains the source address. If the socket ends up being an IPv6 socket,
* udp_append() will convert to a sockaddr_in6 before passing the address
* into the socket code.
*/
static void
udp_append(struct inpcb *inp, struct ip *ip, struct mbuf *n, int off,
struct sockaddr_in *udp_in)
{
struct sockaddr *append_sa;
struct socket *so;
struct mbuf *opts = 0;
#ifdef INET6
struct sockaddr_in6 udp_in6;
#endif
struct udpcb *up;
INP_LOCK_ASSERT(inp);
/*
* Engage the tunneling protocol.
*/
up = intoudpcb(inp);
if (up->u_tun_func != NULL) {
(*up->u_tun_func)(n, off, inp);
return;
}
if (n == NULL)
return;
off += sizeof(struct udphdr);
#ifdef IPSEC
/* Check AH/ESP integrity. */
if (ipsec4_in_reject(n, inp)) {
m_freem(n);
IPSECSTAT_INC(ips_in_polvio);
return;
}
#ifdef IPSEC_NAT_T
up = intoudpcb(inp);
KASSERT(up != NULL, ("%s: udpcb NULL", __func__));
if (up->u_flags & UF_ESPINUDP_ALL) { /* IPSec UDP encaps. */
n = udp4_espdecap(inp, n, off);
if (n == NULL) /* Consumed. */
return;
}
#endif /* IPSEC_NAT_T */
#endif /* IPSEC */
#ifdef MAC
if (mac_inpcb_check_deliver(inp, n) != 0) {
m_freem(n);
return;
}
#endif /* MAC */
if (inp->inp_flags & INP_CONTROLOPTS ||
inp->inp_socket->so_options & (SO_TIMESTAMP | SO_BINTIME)) {
#ifdef INET6
if (inp->inp_vflag & INP_IPV6)
(void)ip6_savecontrol_v4(inp, n, &opts, NULL);
else
#endif /* INET6 */
ip_savecontrol(inp, &opts, ip, n);
}
#ifdef INET6
if (inp->inp_vflag & INP_IPV6) {
bzero(&udp_in6, sizeof(udp_in6));
udp_in6.sin6_len = sizeof(udp_in6);
udp_in6.sin6_family = AF_INET6;
in6_sin_2_v4mapsin6(udp_in, &udp_in6);
append_sa = (struct sockaddr *)&udp_in6;
} else
#endif /* INET6 */
append_sa = (struct sockaddr *)udp_in;
m_adj(n, off);
so = inp->inp_socket;
SOCKBUF_LOCK(&so->so_rcv);
if (sbappendaddr_locked(&so->so_rcv, append_sa, n, opts) == 0) {
SOCKBUF_UNLOCK(&so->so_rcv);
m_freem(n);
if (opts)
m_freem(opts);
UDPSTAT_INC(udps_fullsock);
} else
sorwakeup_locked(so);
}