#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/protosw.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/ip6_mroute.h>
#include <netinet/icmp6.h>
#include <netinet/in_pcb.h>
#include <netinet6/in6_pcb.h>
#include <netinet6/nd6.h>
#include <netinet6/ip6protosw.h>
#if ENABLE_DEFAULT_SCOPE
#include <netinet6/scope6_var.h>
#endif
#include <netinet6/raw_ip6.h>
#include <netinet6/ip6_fw.h>
#if IPSEC
#include <netinet6/ipsec.h>
#include <netinet6/ipsec6.h>
extern int ipsec_bypass;
#endif
#define satosin6(sa) ((struct sockaddr_in6 *)(sa))
#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa))
extern struct inpcbhead ripcb;
extern struct inpcbinfo ripcbinfo;
extern u_int32_t rip_sendspace;
extern u_int32_t rip_recvspace;
struct rip6stat rip6stat;
int
rip6_input(
struct mbuf **mp,
int *offp)
{
struct mbuf *m = *mp;
register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
register struct inpcb *in6p;
struct inpcb *last = 0;
struct mbuf *opts = NULL;
struct sockaddr_in6 rip6src;
int proto = ip6->ip6_nxt;
rip6stat.rip6s_ipackets++;
#if defined(NFAITH) && 0 < NFAITH
if (faithprefix(&ip6->ip6_dst)) {
m_freem(m);
return IPPROTO_DONE;
}
#endif
init_sin6(&rip6src, m);
lck_rw_lock_shared(ripcbinfo.mtx);
LIST_FOREACH(in6p, &ripcb, inp_list) {
if ((in6p->in6p_vflag & INP_IPV6) == 0)
continue;
if (in6p->in6p_ip6_nxt &&
in6p->in6p_ip6_nxt != proto)
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst))
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) &&
!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src))
continue;
if (in6p->in6p_cksum != -1) {
rip6stat.rip6s_isum++;
if (in6_cksum(m, ip6->ip6_nxt, *offp,
m->m_pkthdr.len - *offp)) {
rip6stat.rip6s_badsum++;
continue;
}
}
if (last) {
struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
#if IPSEC
if (ipsec_bypass == 0 && n && ipsec6_in_reject_so(n, last->inp_socket)) {
m_freem(n);
IPSEC_STAT_INCREMENT(ipsec6stat.in_polvio);
} else
#endif
if (n) {
if (last->in6p_flags & IN6P_CONTROLOPTS ||
last->in6p_socket->so_options & SO_TIMESTAMP)
ip6_savecontrol(last, &opts, ip6, n);
m_adj(n, *offp);
if (sbappendaddr(&last->in6p_socket->so_rcv,
(struct sockaddr *)&rip6src,
n, opts, NULL) == 0) {
rip6stat.rip6s_fullsock++;
} else
sorwakeup(last->in6p_socket);
opts = NULL;
}
}
last = in6p;
}
lck_rw_done(ripcbinfo.mtx);
#if IPSEC
if (ipsec_bypass == 0 && last && ipsec6_in_reject_so(m, last->inp_socket)) {
m_freem(m);
IPSEC_STAT_INCREMENT(ipsec6stat.in_polvio);
ip6stat.ip6s_delivered--;
} else
#endif
if (last) {
if (last->in6p_flags & IN6P_CONTROLOPTS ||
last->in6p_socket->so_options & SO_TIMESTAMP)
ip6_savecontrol(last, &opts, ip6, m);
m_adj(m, *offp);
if (sbappendaddr(&last->in6p_socket->so_rcv,
(struct sockaddr *)&rip6src, m, opts, NULL) == 0) {
rip6stat.rip6s_fullsock++;
} else
sorwakeup(last->in6p_socket);
} else {
rip6stat.rip6s_nosock++;
if (m->m_flags & M_MCAST)
rip6stat.rip6s_nosockmcast++;
if (proto == IPPROTO_NONE)
m_freem(m);
else {
char *prvnxtp = ip6_get_prevhdr(m, *offp);
icmp6_error(m, ICMP6_PARAM_PROB,
ICMP6_PARAMPROB_NEXTHEADER,
prvnxtp - mtod(m, char *));
}
ip6stat.ip6s_delivered--;
}
return IPPROTO_DONE;
}
void
rip6_ctlinput(
int cmd,
struct sockaddr *sa,
void *d)
{
struct ip6_hdr *ip6;
struct mbuf *m;
int off = 0;
struct ip6ctlparam *ip6cp = NULL;
const struct sockaddr_in6 *sa6_src = NULL;
void (*notify)(struct inpcb *, int) = in6_rtchange;
if (sa->sa_family != AF_INET6 ||
sa->sa_len != sizeof(struct sockaddr_in6))
return;
if ((unsigned)cmd >= PRC_NCMDS)
return;
if (PRC_IS_REDIRECT(cmd))
notify = in6_rtchange, d = NULL;
else if (cmd == PRC_HOSTDEAD)
d = NULL;
else if (inet6ctlerrmap[cmd] == 0)
return;
if (d != NULL) {
ip6cp = (struct ip6ctlparam *)d;
m = ip6cp->ip6c_m;
ip6 = ip6cp->ip6c_ip6;
off = ip6cp->ip6c_off;
sa6_src = ip6cp->ip6c_src;
} else {
m = NULL;
ip6 = NULL;
sa6_src = &sa6_any;
}
(void) in6_pcbnotify(&ripcbinfo, sa, 0, (const struct sockaddr *)sa6_src,
0, cmd, notify);
}
int
rip6_output(
register struct mbuf *m,
struct socket *so,
struct sockaddr_in6 *dstsock,
struct mbuf *control)
{
struct in6_addr *dst;
struct ip6_hdr *ip6;
struct inpcb *in6p;
u_int plen = m->m_pkthdr.len;
int error = 0;
struct ip6_pktopts opt, *optp = 0;
struct ifnet *oifp = NULL;
int type = 0, code = 0;
int priv = 0;
in6p = sotoin6pcb(so);
priv = 0;
if (so->so_uid == 0)
priv = 1;
dst = &dstsock->sin6_addr;
if (control) {
if ((error = ip6_setpktoptions(control, &opt, priv, 0)) != 0)
goto bad;
optp = &opt;
} else
optp = in6p->in6p_outputopts;
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
struct icmp6_hdr *icmp6;
if (m->m_len < sizeof(struct icmp6_hdr) &&
(m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
error = ENOBUFS;
goto bad;
}
icmp6 = mtod(m, struct icmp6_hdr *);
type = icmp6->icmp6_type;
code = icmp6->icmp6_code;
}
M_PREPEND(m, sizeof(*ip6), M_WAIT);
if (m == NULL) {
error = ENOBUFS;
goto bad;
}
ip6 = mtod(m, struct ip6_hdr *);
ip6->ip6_dst = *dst;
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) {
struct in6_pktinfo *pi;
ifnet_head_lock_shared();
if (optp && (pi = optp->ip6po_pktinfo) && pi->ipi6_ifindex) {
ip6->ip6_dst.s6_addr16[1] = htons(pi->ipi6_ifindex);
oifp = ifindex2ifnet[pi->ipi6_ifindex];
} else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) &&
in6p->in6p_moptions &&
in6p->in6p_moptions->im6o_multicast_ifp) {
oifp = in6p->in6p_moptions->im6o_multicast_ifp;
ip6->ip6_dst.s6_addr16[1] = htons(oifp->if_index);
} else if (dstsock->sin6_scope_id) {
if (if_index < dstsock->sin6_scope_id) {
error = ENXIO;
ifnet_head_done();
goto bad;
}
ip6->ip6_dst.s6_addr16[1]
= htons(dstsock->sin6_scope_id & 0xffff);
}
ifnet_head_done();
}
{
struct in6_addr *in6a;
struct in6_addr storage;
u_short index = 0;
if ((in6a = in6_selectsrc(dstsock, optp,
in6p->in6p_moptions,
&in6p->in6p_route,
&in6p->in6p_laddr,
&storage, &error)) == 0) {
if (error == 0)
error = EADDRNOTAVAIL;
goto bad;
}
ip6->ip6_src = *in6a;
if (in6p->in6p_route.ro_rt != NULL) {
RT_LOCK(in6p->in6p_route.ro_rt);
if (in6p->in6p_route.ro_rt->rt_ifp != NULL)
index = in6p->in6p_route.ro_rt->rt_ifp->if_index;
RT_UNLOCK(in6p->in6p_route.ro_rt);
ifnet_head_lock_shared();
if (index == 0 || if_index < index) {
panic("bad if_index on interface from route");
}
oifp = ifindex2ifnet[index];
ifnet_head_done();
}
}
ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
(in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK);
ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
(IPV6_VERSION & IPV6_VERSION_MASK);
ip6->ip6_nxt = in6p->in6p_ip6_nxt;
ip6->ip6_hlim = in6_selecthlim(in6p, oifp);
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 ||
in6p->in6p_cksum != -1) {
struct mbuf *n;
int off;
u_int16_t *p;
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6)
off = offsetof(struct icmp6_hdr, icmp6_cksum);
else
off = in6p->in6p_cksum;
if (plen < off + 1) {
error = EINVAL;
goto bad;
}
off += sizeof(struct ip6_hdr);
n = m;
while (n && n->m_len <= off) {
off -= n->m_len;
n = n->m_next;
}
if (!n)
goto bad;
p = (u_int16_t *)(mtod(n, caddr_t) + off);
*p = 0;
*p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen);
}
#if IPSEC
if (ipsec_bypass == 0 && ipsec_setsocket(m, so) != 0) {
error = ENOBUFS;
goto bad;
}
#endif
if (in6p->in6p_route.ro_rt != NULL &&
in6p->in6p_route.ro_rt->generation_id != route_generation) {
rtfree(in6p->in6p_route.ro_rt);
in6p->in6p_route.ro_rt = NULL;
}
#if PKT_PRIORITY
if (soisbackground(so))
m_prio_background(m);
#endif
error = ip6_output(m, optp, &in6p->in6p_route, 0,
in6p->in6p_moptions, &oifp, 0);
#if IFNET_ROUTE_REFCNT
if (in6p->in6p_route.ro_rt != NULL &&
((in6p->in6p_route.ro_rt->rt_flags & RTF_MULTICAST) ||
in6p->in6p_socket == NULL ||
in6p->in6p_socket->so_state != SS_ISCONNECTED)) {
rtfree(in6p->in6p_route.ro_rt);
in6p->in6p_route.ro_rt = NULL;
}
#endif
if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
if (oifp)
icmp6_ifoutstat_inc(oifp, type, code);
icmp6stat.icp6s_outhist[type]++;
} else
rip6stat.rip6s_opackets++;
goto freectl;
bad:
if (m)
m_freem(m);
freectl:
if (optp == &opt && optp->ip6po_rthdr && optp->ip6po_route.ro_rt) {
rtfree(optp->ip6po_route.ro_rt);
optp->ip6po_route.ro_rt = NULL;
}
if (control) {
if (optp == &opt)
ip6_clearpktopts(optp, 0, -1);
m_freem(control);
}
return(error);
}
#if IPFW2
static void
load_ip6fw(void)
{
ip6_fw_init();
}
#endif
int
rip6_ctloutput(
struct socket *so,
struct sockopt *sopt)
{
int error;
if (sopt->sopt_level == IPPROTO_ICMPV6)
return(icmp6_ctloutput(so, sopt));
else if (sopt->sopt_level != IPPROTO_IPV6)
return (EINVAL);
error = 0;
switch (sopt->sopt_dir) {
case SOPT_GET:
switch (sopt->sopt_name) {
#if IPFW2
case IPV6_FW_ADD:
case IPV6_FW_GET:
if (ip6_fw_ctl_ptr == 0)
load_ip6fw();
if (ip6_fw_ctl_ptr)
error = ip6_fw_ctl_ptr(sopt);
else
error = ENOPROTOOPT;
break;
#endif
case MRT6_INIT:
case MRT6_DONE:
case MRT6_ADD_MIF:
case MRT6_DEL_MIF:
case MRT6_ADD_MFC:
case MRT6_DEL_MFC:
case MRT6_PIM:
#if MROUTING
error = ip6_mrouter_get(so, sopt);
break;
#endif
default:
error = ip6_ctloutput(so, sopt);
break;
}
break;
case SOPT_SET:
switch (sopt->sopt_name) {
#if IPFW2
case IPV6_FW_ADD:
case IPV6_FW_DEL:
case IPV6_FW_FLUSH:
case IPV6_FW_ZERO:
if (ip6_fw_ctl_ptr == 0)
load_ip6fw();
if (ip6_fw_ctl_ptr)
error = ip6_fw_ctl_ptr(sopt);
else
error = ENOPROTOOPT;
break;
#endif
case MRT6_INIT:
case MRT6_DONE:
case MRT6_ADD_MIF:
case MRT6_DEL_MIF:
case MRT6_ADD_MFC:
case MRT6_DEL_MFC:
case MRT6_PIM:
#if MROUTING
error = ip6_mrouter_set(so, sopt);
break;
#endif
default:
error = ip6_ctloutput(so, sopt);
break;
}
break;
}
return (error);
}
static int
rip6_attach(struct socket *so, int proto, struct proc *p)
{
struct inpcb *inp;
int error;
inp = sotoinpcb(so);
if (inp)
panic("rip6_attach");
if ((error = proc_suser(p)) != 0)
return error;
error = soreserve(so, rip_sendspace, rip_recvspace);
if (error)
return error;
error = in_pcballoc(so, &ripcbinfo, p);
if (error)
return error;
inp = (struct inpcb *)so->so_pcb;
inp->inp_vflag |= INP_IPV6;
inp->in6p_ip6_nxt = (char)proto;
inp->in6p_hops = -1;
inp->in6p_cksum = -1;
MALLOC(inp->in6p_icmp6filt, struct icmp6_filter *,
sizeof(struct icmp6_filter), M_PCB, M_WAITOK);
if (inp->in6p_icmp6filt == NULL)
return (ENOMEM);
ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
return 0;
}
static int
rip6_detach(struct socket *so)
{
struct inpcb *inp;
inp = sotoinpcb(so);
if (inp == 0)
panic("rip6_detach");
#if MROUTING
if (so == ip6_mrouter)
ip6_mrouter_done();
#endif
if (inp->in6p_icmp6filt) {
FREE(inp->in6p_icmp6filt, M_PCB);
inp->in6p_icmp6filt = NULL;
}
in6_pcbdetach(inp);
return 0;
}
static int
rip6_abort(struct socket *so)
{
soisdisconnected(so);
return rip6_detach(so);
}
static int
rip6_disconnect(struct socket *so)
{
struct inpcb *inp = sotoinpcb(so);
if ((so->so_state & SS_ISCONNECTED) == 0)
return ENOTCONN;
inp->in6p_faddr = in6addr_any;
return rip6_abort(so);
}
static int
rip6_bind(struct socket *so, struct sockaddr *nam, __unused struct proc *p)
{
struct inpcb *inp = sotoinpcb(so);
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
struct ifaddr *ia = NULL;
if (nam->sa_len != sizeof(*addr))
return EINVAL;
if (TAILQ_EMPTY(&ifnet_head) || addr->sin6_family != AF_INET6)
return EADDRNOTAVAIL;
#if ENABLE_DEFAULT_SCOPE
if (addr->sin6_scope_id == 0) {
addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
}
#endif
if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) &&
(ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0)
return EADDRNOTAVAIL;
if (ia &&
((struct in6_ifaddr *)ia)->ia6_flags &
(IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
if (ia) ifafree(ia);
return(EADDRNOTAVAIL);
}
if (ia != NULL)
ifafree(ia);
inp->in6p_laddr = addr->sin6_addr;
return 0;
}
static int
rip6_connect(struct socket *so, struct sockaddr *nam, __unused struct proc *p)
{
struct inpcb *inp = sotoinpcb(so);
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam;
struct in6_addr *in6a = NULL;
struct in6_addr storage;
int error = 0;
#if ENABLE_DEFAULT_SCOPE
struct sockaddr_in6 tmp;
#endif
if (nam->sa_len != sizeof(*addr))
return EINVAL;
if (TAILQ_EMPTY(&ifnet_head))
return EADDRNOTAVAIL;
if (addr->sin6_family != AF_INET6)
return EAFNOSUPPORT;
#if ENABLE_DEFAULT_SCOPE
if (addr->sin6_scope_id == 0) {
tmp = *addr;
addr = &tmp;
addr->sin6_scope_id = scope6_addr2default(&addr->sin6_addr);
}
#endif
in6a = in6_selectsrc(addr, inp->in6p_outputopts,
inp->in6p_moptions, &inp->in6p_route,
&inp->in6p_laddr, &storage, &error);
if (in6a == NULL)
return (error ? error : EADDRNOTAVAIL);
inp->in6p_laddr = *in6a;
inp->in6p_faddr = addr->sin6_addr;
soisconnected(so);
return 0;
}
static int
rip6_shutdown(struct socket *so)
{
socantsendmore(so);
return 0;
}
static int
rip6_send(struct socket *so, __unused int flags, struct mbuf *m, struct sockaddr *nam,
struct mbuf *control, __unused struct proc *p)
{
struct inpcb *inp = sotoinpcb(so);
struct sockaddr_in6 tmp;
struct sockaddr_in6 *dst;
if (so->so_state & SS_ISCONNECTED) {
if (nam) {
m_freem(m);
return EISCONN;
}
bzero(&tmp, sizeof(tmp));
tmp.sin6_family = AF_INET6;
tmp.sin6_len = sizeof(struct sockaddr_in6);
bcopy(&inp->in6p_faddr, &tmp.sin6_addr,
sizeof(struct in6_addr));
dst = &tmp;
} else {
if (nam == NULL) {
m_freem(m);
return ENOTCONN;
}
tmp = *(struct sockaddr_in6 *)nam;
dst = &tmp;
}
#if ENABLE_DEFAULT_SCOPE
if (dst->sin6_scope_id == 0) {
dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
}
#endif
return rip6_output(m, so, dst, control);
}
struct pr_usrreqs rip6_usrreqs = {
rip6_abort, pru_accept_notsupp, rip6_attach, rip6_bind, rip6_connect,
pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect,
pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp,
pru_rcvoob_notsupp, rip6_send, pru_sense_null, rip6_shutdown,
in6_setsockaddr, sosend, soreceive, pru_sopoll_notsupp
};
__private_extern__ struct pr_usrreqs icmp6_dgram_usrreqs = {
rip6_abort, pru_accept_notsupp, icmp6_dgram_attach, rip6_bind, rip6_connect,
pru_connect2_notsupp, in6_control, rip6_detach, rip6_disconnect,
pru_listen_notsupp, in6_setpeeraddr, pru_rcvd_notsupp,
pru_rcvoob_notsupp, icmp6_dgram_send, pru_sense_null, rip6_shutdown,
in6_setsockaddr, sosend, soreceive, pru_sopoll_notsupp
};