#if BSD310
#include "opt_inet.h"
#endif
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/errno.h>
#include <sys/stat.h>
#include <sys/systm.h>
#include <sys/syslog.h>
#include <sys/proc.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/in6_pcb.h>
#include <netinet/icmp6.h>
#include <netinet6/udp6_var.h>
#include <netinet6/ip6protosw.h>
#if IPSEC
#include <netinet6/ipsec.h>
#endif
#include "faith.h"
extern struct protosw inetsw[];
static int in6_mcmatch __P((struct inpcb *, struct in6_addr *, struct ifnet *));
static int udp6_detach __P((struct socket *so));
static int
in6_mcmatch(in6p, ia6, ifp)
struct inpcb *in6p;
register struct in6_addr *ia6;
struct ifnet *ifp;
{
struct ip6_moptions *im6o = in6p->in6p_moptions;
struct in6_multi_mship *imm;
if (im6o == NULL)
return 0;
for (imm = im6o->im6o_memberships.lh_first; imm != NULL;
imm = imm->i6mm_chain.le_next) {
if ((ifp == NULL ||
imm->i6mm_maddr->in6m_ifp == ifp) &&
IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,
ia6))
return 1;
}
return 0;
}
int
udp6_input(mp, offp, proto)
struct mbuf **mp;
int *offp, proto;
{
struct mbuf *m = *mp;
register struct ip6_hdr *ip6;
register struct udphdr *uh;
register struct inpcb *in6p;
struct ip6_recvpktopts opts;
int off = *offp;
int plen, ulen;
struct sockaddr_in6 udp_in6;
#if defined(NFAITH) && 0 < NFAITH
if (m->m_pkthdr.rcvif) {
if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) {
m_freem(m);
return IPPROTO_DONE;
}
}
#endif
udpstat.udps_ipackets++;
bzero(&opts, sizeof(opts));
IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
ip6 = mtod(m, struct ip6_hdr *);
plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
uh = (struct udphdr *)((caddr_t)ip6 + off);
ulen = ntohs((u_short)uh->uh_ulen);
if (plen != ulen) {
udpstat.udps_badlen++;
goto bad;
}
else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
udpstat.udps_badsum++;
goto bad;
}
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
struct inpcb *last;
init_sin6(&udp_in6, m);
udp_in6.sin6_port = uh->uh_sport;
last = NULL;
LIST_FOREACH(in6p, &udb, inp_list) {
if ((in6p->inp_vflag & INP_IPV6) == 0)
continue;
if (in6p->in6p_lport != uh->uh_dport)
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
&ip6->ip6_dst) &&
!in6_mcmatch(in6p, &ip6->ip6_dst,
m->m_pkthdr.rcvif))
continue;
}
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
&ip6->ip6_src) ||
in6p->in6p_fport != uh->uh_sport)
continue;
}
if (last != NULL) {
struct mbuf *n;
#if IPSEC
if (ipsec6_in_reject_so(m, last->inp_socket))
ipsec6stat.in_polvio++;
else
#endif
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
if (last->in6p_flags & IN6P_CONTROLOPTS
|| last->in6p_socket->so_options & SO_TIMESTAMP)
ip6_savecontrol(last, ip6, n,
&opts, NULL);
m_adj(n, off + sizeof(struct udphdr));
if (sbappendaddr(&last->in6p_socket->so_rcv,
(struct sockaddr *)&udp_in6,
n, opts.head) == 0) {
m_freem(n);
if (opts.head)
m_freem(opts.head);
udpstat.udps_fullsock++;
} else
sorwakeup(last->in6p_socket);
bzero(&opts, sizeof(opts));
}
}
last = in6p;
if ((last->in6p_socket->so_options &
(SO_REUSEPORT|SO_REUSEADDR)) == 0)
break;
}
if (last == NULL) {
udpstat.udps_noport++;
goto bad;
}
#if IPSEC
if (ipsec6_in_reject_so(m, last->inp_socket)) {
ipsec6stat.in_polvio++;
goto bad;
}
#endif
if (last->in6p_flags & IN6P_CONTROLOPTS
|| last->in6p_socket->so_options & SO_TIMESTAMP)
ip6_savecontrol(last, ip6, m, &opts, NULL);
m_adj(m, off + sizeof(struct udphdr));
if (sbappendaddr(&last->in6p_socket->so_rcv,
(struct sockaddr *)&udp_in6,
m, opts.head) == 0) {
udpstat.udps_fullsock++;
goto bad;
}
sorwakeup(last->in6p_socket);
return IPPROTO_DONE;
}
in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport,
&ip6->ip6_dst, uh->uh_dport, 1,
m->m_pkthdr.rcvif);
if (in6p == 0) {
if (log_in_vain) {
char buf[INET6_ADDRSTRLEN];
strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
log(LOG_INFO,
"Connection attempt to UDP %s:%d from %s:%d\n",
buf, ntohs(uh->uh_dport),
ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
}
udpstat.udps_noport++;
if (m->m_flags & M_MCAST) {
printf("UDP6: M_MCAST is set in a unicast packet.\n");
goto bad;
}
icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
return IPPROTO_DONE;
}
#if IPSEC
if (ipsec6_in_reject_so(m, in6p->in6p_socket)) {
ipsec6stat.in_polvio++;
goto bad;
}
#endif
init_sin6(&udp_in6, m);
udp_in6.sin6_port = uh->uh_sport;
if (in6p->in6p_flags & IN6P_CONTROLOPTS
|| in6p->in6p_socket->so_options & SO_TIMESTAMP)
ip6_savecontrol(in6p, ip6, m, &opts, NULL);
m_adj(m, off + sizeof(struct udphdr));
if (sbappendaddr(&in6p->in6p_socket->so_rcv,
(struct sockaddr *)&udp_in6,
m, opts.head) == 0) {
udpstat.udps_fullsock++;
goto bad;
}
sorwakeup(in6p->in6p_socket);
return IPPROTO_DONE;
bad:
if (m)
m_freem(m);
if (opts.head)
m_freem(opts.head);
return IPPROTO_DONE;
}
void
udp6_ctlinput(cmd, sa, d)
int cmd;
struct sockaddr *sa;
void *d;
{
register struct udphdr *uhp;
struct udphdr uh;
struct sockaddr_in6 sa6;
struct ip6_hdr *ip6;
struct mbuf *m;
int off = 0;
void (*notify) __P((struct inpcb *, int)) = udp_notify;
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) {
struct ip6ctlparam *ip6cp = (struct ip6ctlparam *)d;
m = ip6cp->ip6c_m;
ip6 = ip6cp->ip6c_ip6;
off = ip6cp->ip6c_off;
} else {
m = NULL;
ip6 = NULL;
}
sa6 = *(struct sockaddr_in6 *)sa;
if (IN6_IS_ADDR_LINKLOCAL(&sa6.sin6_addr) && m && m->m_pkthdr.rcvif)
sa6.sin6_addr.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index);
if (ip6) {
struct in6_addr s;
memcpy(&s, &ip6->ip6_src, sizeof(s));
if (IN6_IS_ADDR_LINKLOCAL(&s))
s.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index);
if (m->m_len < off + sizeof(uh)) {
m_copydata(m, off, sizeof(uh), (caddr_t)&uh);
uhp = &uh;
} else
uhp = (struct udphdr *)(mtod(m, caddr_t) + off);
(void) in6_pcbnotify(&udb, (struct sockaddr *)&sa6,
uhp->uh_dport, &s,
uhp->uh_sport, cmd, notify);
} else
(void) in6_pcbnotify(&udb, (struct sockaddr *)&sa6, 0,
&zeroin6_addr, 0, cmd, notify);
}
#if 0
static int
udp6_getcred SYSCTL_HANDLER_ARGS
{
struct sockaddr_in6 addrs[2];
struct inpcb *inp;
int error, s;
error = suser(req->p->p_ucred, &req->p->p_acflag);
if (error)
return (error);
if (req->newlen != sizeof(addrs))
return (EINVAL);
if (req->oldlen != sizeof(struct ucred))
return (EINVAL);
error = SYSCTL_IN(req, addrs, sizeof(addrs));
if (error)
return (error);
s = splnet();
inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr,
addrs[1].sin6_port,
&addrs[0].sin6_addr, addrs[0].sin6_port,
1, NULL);
if (!inp || !inp->inp_socket || !inp->inp_socket->so_cred) {
error = ENOENT;
goto out;
}
error = SYSCTL_OUT(req, inp->inp_socket->so_cred->pc_ucred,
sizeof(struct ucred));
out:
splx(s);
return (error);
}
SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
0, 0,
udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection");
#endif
int
udp6_output(in6p, m, addr6, control, p)
register struct inpcb *in6p;
register struct mbuf *m;
struct sockaddr *addr6;
struct mbuf *control;
struct proc *p;
{
register int ulen = m->m_pkthdr.len;
int plen = sizeof(struct udphdr) + ulen;
struct ip6_hdr *ip6;
struct udphdr *udp6;
struct in6_addr laddr6;
int s = 0, error = 0;
struct ip6_pktopts opt, *stickyopt = in6p->in6p_outputopts;
int flags;
if (control) {
if (error = ip6_setpktoptions(control, &opt,
p &&
suser(p->p_ucred, &p->p_acflag), 0))
goto release;
in6p->in6p_outputopts = &opt;
}
if (addr6) {
laddr6 = in6p->in6p_laddr;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
error = EISCONN;
goto release;
}
s = splnet();
bzero(&in6p->in6p_laddr, sizeof(struct in6_addr));
error = in6_pcbconnect(in6p, addr6, p);
if (error) {
splx(s);
goto release;
}
} else {
if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
error = ENOTCONN;
goto release;
}
}
M_PREPEND(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr),
M_DONTWAIT);
if (m == 0) {
error = ENOBUFS;
if (addr6)
splx(s);
goto release;
}
ip6 = mtod(m, struct ip6_hdr *);
ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK;
ip6->ip6_vfc |= IPV6_VERSION;
#if 0
ip6->ip6_plen = htons((u_short)plen);
#endif
ip6->ip6_nxt = IPPROTO_UDP;
ip6->ip6_hlim = in6_selecthlim(in6p,
in6p->in6p_route.ro_rt ?
in6p->in6p_route.ro_rt->rt_ifp :
NULL);
ip6->ip6_src = in6p->in6p_laddr;
ip6->ip6_dst = in6p->in6p_faddr;
udp6 = (struct udphdr *)(ip6 + 1);
udp6->uh_sport = in6p->in6p_lport;
udp6->uh_dport = in6p->in6p_fport;
udp6->uh_ulen = htons((u_short)plen);
udp6->uh_sum = 0;
if ((udp6->uh_sum = in6_cksum(m, IPPROTO_UDP,
sizeof(struct ip6_hdr), plen)) == 0) {
udp6->uh_sum = 0xffff;
}
flags = 0;
if (in6p->in6p_flags & IN6P_MINMTU)
flags |= IPV6_MINMTU;
udpstat.udps_opackets++;
#if IPSEC
ipsec_setsocket(m, in6p->in6p_socket);
#endif
error = ip6_output(m, in6p->in6p_outputopts, &in6p->in6p_route,
flags, in6p->in6p_moptions, NULL);
if (addr6) {
in6_pcbdisconnect(in6p);
in6p->in6p_laddr = laddr6;
splx(s);
}
goto releaseopt;
release:
m_freem(m);
releaseopt:
if (control) {
ip6_clearpktopts(in6p->in6p_outputopts, 0, -1);
in6p->in6p_outputopts = stickyopt;
m_freem(control);
}
return(error);
}
static int
udp6_abort(struct socket *so)
{
struct inpcb *inp;
int s;
inp = sotoinpcb(so);
if (inp == 0)
return EINVAL;
soisdisconnected(so);
s = splnet();
in6_pcbdetach(inp);
splx(s);
return 0;
}
static int
udp6_attach(struct socket *so, int proto, struct proc *p)
{
struct inpcb *inp;
int s, error;
inp = sotoinpcb(so);
if (inp != 0)
return EINVAL;
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
error = soreserve(so, udp_sendspace, udp_recvspace);
if (error)
return error;
}
s = splnet();
error = in_pcballoc(so, &udbinfo, p);
splx(s);
if (error)
return error;
inp = (struct inpcb *)so->so_pcb;
inp->inp_vflag |= INP_IPV6;
inp->in6p_hops = -1;
inp->in6p_cksum = -1;
#if IPSEC
error = ipsec_init_policy(so, &inp->in6p_sp);
if (error != 0) {
in6_pcbdetach(inp);
return (error);
}
#endif
return 0;
}
static int
udp6_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
{
struct inpcb *inp;
int s, error;
inp = sotoinpcb(so);
if (inp == 0)
return EINVAL;
inp->inp_vflag &= ~INP_IPV4;
inp->inp_vflag |= INP_IPV6;
if (ip6_mapped_addr_on && (inp->inp_flags & IN6P_BINDV6ONLY) == 0) {
struct sockaddr_in6 *sin6_p;
sin6_p = (struct sockaddr_in6 *)nam;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
inp->inp_vflag |= INP_IPV4;
else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
struct sockaddr_in sin;
in6_sin6_2_sin(&sin, sin6_p);
inp->inp_vflag |= INP_IPV4;
inp->inp_vflag &= ~INP_IPV6;
s = splnet();
error = in_pcbbind(inp, (struct sockaddr *)&sin, p);
splx(s);
return error;
}
}
s = splnet();
error = in6_pcbbind(inp, nam, p);
splx(s);
return error;
}
static int
udp6_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
{
struct inpcb *inp;
int s, error;
inp = sotoinpcb(so);
if (inp == 0)
return EINVAL;
if (ip6_mapped_addr_on) {
struct sockaddr_in6 *sin6_p;
sin6_p = (struct sockaddr_in6 *)nam;
if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
struct sockaddr_in sin;
if (inp->inp_faddr.s_addr != INADDR_ANY)
return EISCONN;
in6_sin6_2_sin(&sin, sin6_p);
s = splnet();
error = in_pcbconnect(inp, (struct sockaddr *)&sin, p);
splx(s);
if (error == 0) {
inp->inp_vflag |= INP_IPV4;
inp->inp_vflag &= ~INP_IPV6;
soisconnected(so);
}
return error;
}
}
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
return EISCONN;
s = splnet();
error = in6_pcbconnect(inp, nam, p);
if (ip6_auto_flowlabel) {
inp->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK;
inp->in6p_flowinfo |=
(htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK);
}
splx(s);
if (error == 0) {
if (ip6_mapped_addr_on) {
inp->inp_vflag &= ~INP_IPV4;
inp->inp_vflag |= INP_IPV6;
}
soisconnected(so);
}
return error;
}
static int
udp6_detach(struct socket *so)
{
struct inpcb *inp;
int s;
inp = sotoinpcb(so);
if (inp == 0)
return EINVAL;
s = splnet();
in6_pcbdetach(inp);
splx(s);
return 0;
}
static int
udp6_disconnect(struct socket *so)
{
struct inpcb *inp;
int s;
inp = sotoinpcb(so);
if (inp == 0)
return EINVAL;
if (inp->inp_vflag & INP_IPV4) {
struct pr_usrreqs *pru;
pru = ip_protox[IPPROTO_UDP]->pr_usrreqs;
return ((*pru->pru_disconnect)(so));
}
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
return ENOTCONN;
s = splnet();
in6_pcbdisconnect(inp);
inp->in6p_laddr = in6addr_any;
splx(s);
so->so_state &= ~SS_ISCONNECTED;
return 0;
}
static int
udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
struct mbuf *control, struct proc *p)
{
struct inpcb *inp;
inp = sotoinpcb(so);
if (inp == 0) {
m_freem(m);
return EINVAL;
}
if (ip6_mapped_addr_on) {
int hasv4addr;
struct sockaddr_in6 *sin6 = 0;
if (addr == 0)
hasv4addr = (inp->inp_vflag & INP_IPV4);
else {
sin6 = (struct sockaddr_in6 *)addr;
hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
? 1 : 0;
}
if (hasv4addr) {
struct pr_usrreqs *pru;
int error;
if (sin6)
in6_sin6_2_sin_in_sock(addr);
pru = ip_protox[IPPROTO_UDP]->pr_usrreqs;
error = ((*pru->pru_send)(so, flags, m, addr, control,
p));
return error;
}
}
return udp6_output(inp, m, addr, control, p);
}
struct pr_usrreqs udp6_usrreqs = {
udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect,
pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect,
pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp,
pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown,
in6_mapped_sockaddr, sosend, soreceive, sopoll
};