| version 1.52, 1999/09/13 12:15:55 |
version 1.52.2.3, 2001/02/11 19:17:19 |
|
|
| */ |
*/ |
| |
|
| #include "opt_ipsec.h" |
#include "opt_ipsec.h" |
| |
#include "opt_ipkdb.h" |
| #include "ipkdb.h" |
|
| |
|
| /* XXX MAPPED_ADDR_ENABLED should be revisited */ |
|
| |
|
| #include <sys/param.h> |
#include <sys/param.h> |
| #include <sys/malloc.h> |
#include <sys/malloc.h> |
| #include <sys/mbuf.h> |
#include <sys/mbuf.h> |
| #ifdef MAPPED_ADDR_ENABLED |
|
| #include <sys/domain.h> |
|
| #endif /* MAPPED_ADDR_ENABLED */ |
|
| #include <sys/protosw.h> |
#include <sys/protosw.h> |
| #include <sys/socket.h> |
#include <sys/socket.h> |
| #include <sys/socketvar.h> |
#include <sys/socketvar.h> |
|
|
| #include <sys/stat.h> |
#include <sys/stat.h> |
| #include <sys/systm.h> |
#include <sys/systm.h> |
| #include <sys/proc.h> |
#include <sys/proc.h> |
| |
#include <sys/domain.h> |
| |
|
| #include <vm/vm.h> |
#include <uvm/uvm_extern.h> |
| #include <sys/sysctl.h> |
#include <sys/sysctl.h> |
| |
|
| #include <net/if.h> |
#include <net/if.h> |
|
|
| #include <netinet/udp.h> |
#include <netinet/udp.h> |
| #include <netinet/udp_var.h> |
#include <netinet/udp_var.h> |
| |
|
| |
#ifdef INET6 |
| |
#include <netinet/ip6.h> |
| |
#include <netinet/icmp6.h> |
| |
#include <netinet6/ip6_var.h> |
| |
#include <netinet6/in6_pcb.h> |
| |
#include <netinet6/udp6_var.h> |
| |
#endif |
| |
|
| |
#ifdef PULLDOWN_TEST |
| |
#ifndef INET6 |
| |
/* always need ip6.h for IP6_EXTHDR_GET */ |
| |
#include <netinet/ip6.h> |
| |
#endif |
| |
#endif |
| |
|
| #include <machine/stdarg.h> |
#include <machine/stdarg.h> |
| |
|
| #ifdef IPSEC |
#ifdef IPSEC |
| #include <netinet6/ipsec.h> |
#include <netinet6/ipsec.h> |
| #include <netkey/key.h> |
#include <netkey/key.h> |
| #include <netkey/key_debug.h> |
|
| #endif /*IPSEC*/ |
#endif /*IPSEC*/ |
| |
|
| |
#ifdef IPKDB |
| |
#include <ipkdb/ipkdb.h> |
| |
#endif |
| |
|
| /* |
/* |
| * UDP protocol implementation. |
* UDP protocol implementation. |
| * Per RFC 768, August, 1980. |
* Per RFC 768, August, 1980. |
| Line 118 int udpcksum = 1; |
|
| Line 131 int udpcksum = 1; |
|
| int udpcksum = 0; /* XXX */ |
int udpcksum = 0; /* XXX */ |
| #endif |
#endif |
| |
|
| |
#ifdef INET |
| |
static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *, |
| |
struct socket *)); |
| |
static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *, |
| |
struct mbuf *, int)); |
| |
#endif |
| |
#ifdef INET6 |
| |
static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *, |
| |
struct socket *)); |
| |
static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, |
| |
struct ifnet *)); |
| |
static int udp6_realinput __P((int, struct sockaddr_in6 *, |
| |
struct sockaddr_in6 *, struct mbuf *, int)); |
| |
#endif |
| |
#ifdef INET |
| static void udp_notify __P((struct inpcb *, int)); |
static void udp_notify __P((struct inpcb *, int)); |
| |
#endif |
| |
|
| #ifndef UDBHASHSIZE |
#ifndef UDBHASHSIZE |
| #define UDBHASHSIZE 128 |
#define UDBHASHSIZE 128 |
|
|
| udp_init() |
udp_init() |
| { |
{ |
| |
|
| |
#ifdef INET |
| in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
| |
#endif |
| |
} |
| |
|
| |
#ifndef UDP6 |
| |
#ifdef INET |
| |
void |
| |
#if __STDC__ |
| |
udp_input(struct mbuf *m, ...) |
| |
#else |
| |
udp_input(m, va_alist) |
| |
struct mbuf *m; |
| |
va_dcl |
| |
#endif |
| |
{ |
| |
va_list ap; |
| |
struct sockaddr_in src, dst; |
| |
struct ip *ip; |
| |
struct udphdr *uh; |
| |
int iphlen, proto; |
| |
int len; |
| |
int n; |
| |
|
| |
va_start(ap, m); |
| |
iphlen = va_arg(ap, int); |
| |
proto = va_arg(ap, int); |
| |
va_end(ap); |
| |
|
| |
udpstat.udps_ipackets++; |
| |
|
| |
#ifndef PULLDOWN_TEST |
| |
/* |
| |
* Strip IP options, if any; should skip this, |
| |
* make available to user, and use on returned packets, |
| |
* but we don't yet have a way to check the checksum |
| |
* with options still present. |
| |
*/ |
| |
if (iphlen > sizeof (struct ip)) { |
| |
ip_stripoptions(m, (struct mbuf *)0); |
| |
iphlen = sizeof(struct ip); |
| |
} |
| |
#else |
| |
/* |
| |
* we may enable the above code if we save and pass IPv4 options |
| |
* to the userland. |
| |
*/ |
| |
#endif |
| |
|
| |
/* |
| |
* Get IP and UDP header together in first mbuf. |
| |
*/ |
| |
ip = mtod(m, struct ip *); |
| |
#ifndef PULLDOWN_TEST |
| |
if (m->m_len < iphlen + sizeof(struct udphdr)) { |
| |
if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { |
| |
udpstat.udps_hdrops++; |
| |
return; |
| |
} |
| |
ip = mtod(m, struct ip *); |
| |
} |
| |
uh = (struct udphdr *)((caddr_t)ip + iphlen); |
| |
#else |
| |
IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); |
| |
if (uh == NULL) { |
| |
udpstat.udps_hdrops++; |
| |
return; |
| |
} |
| |
#endif |
| |
|
| |
/* destination port of 0 is illegal, based on RFC768. */ |
| |
if (uh->uh_dport == 0) |
| |
goto bad; |
| |
|
| |
/* |
| |
* Make mbuf data length reflect UDP length. |
| |
* If not enough data to reflect UDP length, drop. |
| |
*/ |
| |
len = ntohs((u_int16_t)uh->uh_ulen); |
| |
if (ip->ip_len != iphlen + len) { |
| |
if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) { |
| |
udpstat.udps_badlen++; |
| |
goto bad; |
| |
} |
| |
m_adj(m, iphlen + len - ip->ip_len); |
| |
} |
| |
|
| |
/* |
| |
* Checksum extended UDP header and data. |
| |
*/ |
| |
if (uh->uh_sum) { |
| |
if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) { |
| |
udpstat.udps_badsum++; |
| |
m_freem(m); |
| |
return; |
| |
} |
| |
} |
| |
|
| |
/* construct source and dst sockaddrs. */ |
| |
bzero(&src, sizeof(src)); |
| |
src.sin_family = AF_INET; |
| |
src.sin_len = sizeof(struct sockaddr_in); |
| |
bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr)); |
| |
src.sin_port = uh->uh_sport; |
| |
bzero(&dst, sizeof(dst)); |
| |
dst.sin_family = AF_INET; |
| |
dst.sin_len = sizeof(struct sockaddr_in); |
| |
bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr)); |
| |
dst.sin_port = uh->uh_dport; |
| |
|
| |
n = udp4_realinput(&src, &dst, m, iphlen); |
| |
#ifdef INET6 |
| |
if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { |
| |
struct sockaddr_in6 src6, dst6; |
| |
|
| |
bzero(&src6, sizeof(src6)); |
| |
src6.sin6_family = AF_INET6; |
| |
src6.sin6_len = sizeof(struct sockaddr_in6); |
| |
src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; |
| |
bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12], |
| |
sizeof(ip->ip_src)); |
| |
src6.sin6_port = uh->uh_sport; |
| |
bzero(&dst6, sizeof(dst6)); |
| |
dst6.sin6_family = AF_INET6; |
| |
dst6.sin6_len = sizeof(struct sockaddr_in6); |
| |
dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; |
| |
bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12], |
| |
sizeof(ip->ip_dst)); |
| |
dst6.sin6_port = uh->uh_dport; |
| |
|
| |
n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); |
| |
} |
| |
#endif |
| |
|
| |
if (n == 0) { |
| |
if (m->m_flags & (M_BCAST | M_MCAST)) { |
| |
udpstat.udps_noportbcast++; |
| |
goto bad; |
| |
} |
| |
udpstat.udps_noport++; |
| |
#ifdef IPKDB |
| |
if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, |
| |
m, iphlen + sizeof(struct udphdr), |
| |
m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { |
| |
/* |
| |
* It was a debugger connect packet, |
| |
* just drop it now |
| |
*/ |
| |
goto bad; |
| |
} |
| |
#endif |
| |
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); |
| |
m = NULL; |
| |
} |
| |
|
| |
bad: |
| |
if (m) |
| |
m_freem(m); |
| |
} |
| |
#endif |
| |
|
| |
#ifdef INET6 |
| |
int |
| |
udp6_input(mp, offp, proto) |
| |
struct mbuf **mp; |
| |
int *offp, proto; |
| |
{ |
| |
struct mbuf *m = *mp; |
| |
int off = *offp; |
| |
struct sockaddr_in6 src, dst; |
| |
struct ip6_hdr *ip6; |
| |
struct udphdr *uh; |
| |
u_int32_t plen, ulen; |
| |
|
| |
#if defined(NFAITH) && 0 < NFAITH |
| |
if (m->m_pkthdr.rcvif) { |
| |
if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { |
| |
/* send icmp6 host unreach? */ |
| |
m_freem(m); |
| |
return IPPROTO_DONE; |
| |
} |
| |
} |
| |
#endif |
| |
|
| |
udp6stat.udp6s_ipackets++; |
| |
|
| |
#ifndef PULLDOWN_TEST |
| |
IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); |
| |
#endif |
| |
|
| |
ip6 = mtod(m, struct ip6_hdr *); |
| |
/* check for jumbogram is done in ip6_input. we can trust pkthdr.len */ |
| |
plen = m->m_pkthdr.len - off; |
| |
#ifndef PULLDOWN_TEST |
| |
uh = (struct udphdr *)((caddr_t)ip6 + off); |
| |
#else |
| |
IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); |
| |
if (uh == NULL) { |
| |
ip6stat.ip6s_tooshort++; |
| |
return IPPROTO_DONE; |
| |
} |
| |
#endif |
| |
ulen = ntohs((u_short)uh->uh_ulen); |
| |
/* |
| |
* RFC2675 section 4: jumbograms will have 0 in the UDP header field, |
| |
* iff payload length > 0xffff. |
| |
*/ |
| |
if (ulen == 0 && plen > 0xffff) |
| |
ulen = plen; |
| |
|
| |
if (plen != ulen) { |
| |
udp6stat.udp6s_badlen++; |
| |
goto bad; |
| |
} |
| |
|
| |
/* destination port of 0 is illegal, based on RFC768. */ |
| |
if (uh->uh_dport == 0) |
| |
goto bad; |
| |
|
| |
/* Be proactive about malicious use of IPv4 mapped address */ |
| |
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
| |
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
| |
/* XXX stat */ |
| |
goto bad; |
| |
} |
| |
|
| |
/* |
| |
* Checksum extended UDP header and data. |
| |
*/ |
| |
if (uh->uh_sum == 0) |
| |
udp6stat.udp6s_nosum++; |
| |
else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { |
| |
udp6stat.udp6s_badsum++; |
| |
goto bad; |
| |
} |
| |
|
| |
/* |
| |
* Construct source and dst sockaddrs. |
| |
* Note that ifindex (s6_addr16[1]) is already filled. |
| |
*/ |
| |
bzero(&src, sizeof(src)); |
| |
src.sin6_family = AF_INET6; |
| |
src.sin6_len = sizeof(struct sockaddr_in6); |
| |
/* KAME hack: recover scopeid */ |
| |
(void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif); |
| |
src.sin6_port = uh->uh_sport; |
| |
bzero(&dst, sizeof(dst)); |
| |
dst.sin6_family = AF_INET6; |
| |
dst.sin6_len = sizeof(struct sockaddr_in6); |
| |
/* KAME hack: recover scopeid */ |
| |
(void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif); |
| |
dst.sin6_port = uh->uh_dport; |
| |
|
| |
if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { |
| |
if (m->m_flags & M_MCAST) { |
| |
udp6stat.udp6s_noportmcast++; |
| |
goto bad; |
| |
} |
| |
udp6stat.udp6s_noport++; |
| |
icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); |
| |
m = NULL; |
| |
} |
| |
|
| |
bad: |
| |
if (m) |
| |
m_freem(m); |
| |
return IPPROTO_DONE; |
| |
} |
| |
#endif |
| |
|
| |
#ifdef INET |
| |
static void |
| |
udp4_sendup(m, off, src, so) |
| |
struct mbuf *m; |
| |
int off; /* offset of data portion */ |
| |
struct sockaddr *src; |
| |
struct socket *so; |
| |
{ |
| |
struct mbuf *opts = NULL; |
| |
struct mbuf *n; |
| |
struct inpcb *inp = NULL; |
| |
#ifdef INET6 |
| |
struct in6pcb *in6p = NULL; |
| |
#endif |
| |
|
| |
if (!so) |
| |
return; |
| |
switch (so->so_proto->pr_domain->dom_family) { |
| |
case AF_INET: |
| |
inp = sotoinpcb(so); |
| |
break; |
| |
#ifdef INET6 |
| |
case AF_INET6: |
| |
in6p = sotoin6pcb(so); |
| |
break; |
| |
#endif |
| |
default: |
| |
return; |
| |
} |
| |
|
| |
#ifdef IPSEC |
| |
/* check AH/ESP integrity. */ |
| |
if (so != NULL && ipsec4_in_reject_so(m, so)) { |
| |
ipsecstat.in_polvio++; |
| |
return; |
| |
} |
| |
#endif /*IPSEC*/ |
| |
|
| |
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
| |
if (inp && (inp->inp_flags & INP_CONTROLOPTS |
| |
|| so->so_options & SO_TIMESTAMP)) { |
| |
struct ip *ip = mtod(n, struct ip *); |
| |
ip_savecontrol(inp, &opts, ip, n); |
| |
} |
| |
|
| |
m_adj(n, off); |
| |
if (sbappendaddr(&so->so_rcv, src, n, |
| |
opts) == 0) { |
| |
m_freem(n); |
| |
if (opts) |
| |
m_freem(opts); |
| |
} else |
| |
sorwakeup(so); |
| |
} |
| |
} |
| |
#endif |
| |
|
| |
#ifdef INET6 |
| |
static void |
| |
udp6_sendup(m, off, src, so) |
| |
struct mbuf *m; |
| |
int off; /* offset of data portion */ |
| |
struct sockaddr *src; |
| |
struct socket *so; |
| |
{ |
| |
struct mbuf *opts = NULL; |
| |
struct mbuf *n; |
| |
struct in6pcb *in6p = NULL; |
| |
|
| |
if (!so) |
| |
return; |
| |
if (so->so_proto->pr_domain->dom_family != AF_INET6) |
| |
return; |
| |
in6p = sotoin6pcb(so); |
| |
|
| |
#ifdef IPSEC |
| |
/* check AH/ESP integrity. */ |
| |
if (so != NULL && ipsec6_in_reject_so(m, so)) { |
| |
ipsec6stat.in_polvio++; |
| |
return; |
| |
} |
| |
#endif /*IPSEC*/ |
| |
|
| |
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
| |
if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS |
| |
|| in6p->in6p_socket->so_options & SO_TIMESTAMP)) { |
| |
struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *); |
| |
ip6_savecontrol(in6p, &opts, ip6, n); |
| |
} |
| |
|
| |
m_adj(n, off); |
| |
if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) { |
| |
m_freem(n); |
| |
if (opts) |
| |
m_freem(opts); |
| |
udp6stat.udp6s_fullsock++; |
| |
} else |
| |
sorwakeup(so); |
| |
} |
| } |
} |
| |
#endif |
| |
|
| |
#ifdef INET |
| |
static int |
| |
udp4_realinput(src, dst, m, off) |
| |
struct sockaddr_in *src; |
| |
struct sockaddr_in *dst; |
| |
struct mbuf *m; |
| |
int off; /* offset of udphdr */ |
| |
{ |
| |
u_int16_t *sport, *dport; |
| |
int rcvcnt; |
| |
struct in_addr *src4, *dst4; |
| |
struct inpcb *inp; |
| |
|
| |
rcvcnt = 0; |
| |
off += sizeof(struct udphdr); /* now, offset of payload */ |
| |
|
| |
if (src->sin_family != AF_INET || dst->sin_family != AF_INET) |
| |
goto bad; |
| |
|
| |
src4 = &src->sin_addr; |
| |
sport = &src->sin_port; |
| |
dst4 = &dst->sin_addr; |
| |
dport = &dst->sin_port; |
| |
|
| |
if (IN_MULTICAST(dst4->s_addr) || |
| |
in_broadcast(*dst4, m->m_pkthdr.rcvif)) { |
| |
struct inpcb *last; |
| |
/* |
| |
* Deliver a multicast or broadcast datagram to *all* sockets |
| |
* for which the local and remote addresses and ports match |
| |
* those of the incoming datagram. This allows more than |
| |
* one process to receive multi/broadcasts on the same port. |
| |
* (This really ought to be done for unicast datagrams as |
| |
* well, but that would cause problems with existing |
| |
* applications that open both address-specific sockets and |
| |
* a wildcard socket listening to the same port -- they would |
| |
* end up receiving duplicates of every unicast datagram. |
| |
* Those applications open the multiple sockets to overcome an |
| |
* inadequacy of the UDP socket interface, but for backwards |
| |
* compatibility we avoid the problem here rather than |
| |
* fixing the interface. Maybe 4.5BSD will remedy this?) |
| |
*/ |
| |
|
| |
/* |
| |
* KAME note: usually we drop udpiphdr from mbuf here. |
| |
* we need udpiphdr for IPsec processing so we do that later. |
| |
*/ |
| |
/* |
| |
* Locate pcb(s) for datagram. |
| |
*/ |
| |
for (inp = udbtable.inpt_queue.cqh_first; |
| |
inp != (struct inpcb *)&udbtable.inpt_queue; |
| |
inp = inp->inp_queue.cqe_next) { |
| |
if (inp->inp_lport != *dport) |
| |
continue; |
| |
if (!in_nullhost(inp->inp_laddr)) { |
| |
if (!in_hosteq(inp->inp_laddr, *dst4)) |
| |
continue; |
| |
} |
| |
if (!in_nullhost(inp->inp_faddr)) { |
| |
if (!in_hosteq(inp->inp_faddr, *src4) || |
| |
inp->inp_fport != *sport) |
| |
continue; |
| |
} |
| |
|
| |
last = inp; |
| |
udp4_sendup(m, off, (struct sockaddr *)src, |
| |
inp->inp_socket); |
| |
rcvcnt++; |
| |
|
| |
/* |
| |
* 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_REUSEADDR)) == 0) |
| |
break; |
| |
} |
| |
|
| |
#if 0 |
| |
if (last == NULL) { |
| |
/* |
| |
* No matching pcb found; discard datagram. |
| |
* (No need to send an ICMP Port Unreachable |
| |
* for a broadcast or multicast datgram.) |
| |
*/ |
| |
udpstat.udps_noportbcast++; |
| |
goto bad; |
| |
} |
| |
#endif |
| |
} else { |
| |
/* |
| |
* Locate pcb for datagram. |
| |
*/ |
| |
inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport); |
| |
if (inp == 0) { |
| |
++udpstat.udps_pcbhashmiss; |
| |
inp = in_pcblookup_bind(&udbtable, *dst4, *dport); |
| |
if (inp == 0) { |
| |
#if 0 |
| |
struct mbuf *n; |
| |
|
| |
if (m->m_flags & (M_BCAST | M_MCAST)) { |
| |
udpstat.udps_noportbcast++; |
| |
goto bad; |
| |
} |
| |
udpstat.udps_noport++; |
| |
#ifdef IPKDB |
| |
if (checkipkdb(src4, *sport, *dport, m, off, |
| |
m->m_pkthdr.len - off)) { |
| |
/* |
| |
* It was a debugger connect packet, |
| |
* just drop it now |
| |
*/ |
| |
goto bad; |
| |
} |
| |
#endif |
| |
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
| |
icmp_error(n, ICMP_UNREACH, |
| |
ICMP_UNREACH_PORT, 0, 0); |
| |
} |
| |
#endif |
| |
return rcvcnt; |
| |
} |
| |
} |
| |
|
| |
udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
| |
rcvcnt++; |
| |
} |
| |
|
| |
bad: |
| |
return rcvcnt; |
| |
} |
| |
#endif |
| |
|
| |
#ifdef INET6 |
| |
static int |
| |
in6_mcmatch(in6p, ia6, ifp) |
| |
struct in6pcb *in6p; |
| |
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; |
| |
} |
| |
|
| |
static int |
| |
udp6_realinput(af, src, dst, m, off) |
| |
int af; /* af on packet */ |
| |
struct sockaddr_in6 *src; |
| |
struct sockaddr_in6 *dst; |
| |
struct mbuf *m; |
| |
int off; /* offset of udphdr */ |
| |
{ |
| |
u_int16_t *sport, *dport; |
| |
int rcvcnt; |
| |
struct in6_addr *src6, *dst6; |
| |
struct in_addr *dst4; |
| |
struct in6pcb *in6p; |
| |
|
| |
rcvcnt = 0; |
| |
off += sizeof(struct udphdr); /* now, offset of payload */ |
| |
|
| |
if (af != AF_INET && af != AF_INET6) |
| |
goto bad; |
| |
if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6) |
| |
goto bad; |
| |
|
| |
src6 = &src->sin6_addr; |
| |
sport = &src->sin6_port; |
| |
dst6 = &dst->sin6_addr; |
| |
dport = &dst->sin6_port; |
| |
dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr32[12]; |
| |
|
| |
if (IN6_IS_ADDR_MULTICAST(dst6) |
| |
|| (af == AF_INET && IN_MULTICAST(dst4->s_addr))) { |
| |
struct in6pcb *last; |
| |
/* |
| |
* Deliver a multicast or broadcast datagram to *all* sockets |
| |
* for which the local and remote addresses and ports match |
| |
* those of the incoming datagram. This allows more than |
| |
* one process to receive multi/broadcasts on the same port. |
| |
* (This really ought to be done for unicast datagrams as |
| |
* well, but that would cause problems with existing |
| |
* applications that open both address-specific sockets and |
| |
* a wildcard socket listening to the same port -- they would |
| |
* end up receiving duplicates of every unicast datagram. |
| |
* Those applications open the multiple sockets to overcome an |
| |
* inadequacy of the UDP socket interface, but for backwards |
| |
* compatibility we avoid the problem here rather than |
| |
* fixing the interface. Maybe 4.5BSD will remedy this?) |
| |
*/ |
| |
|
| |
/* |
| |
* KAME note: usually we drop udpiphdr from mbuf here. |
| |
* we need udpiphdr for IPsec processing so we do that later. |
| |
*/ |
| |
/* |
| |
* Locate pcb(s) for datagram. |
| |
*/ |
| |
for (in6p = udb6.in6p_next; in6p != &udb6; |
| |
in6p = in6p->in6p_next) { |
| |
if (in6p->in6p_lport != *dport) |
| |
continue; |
| |
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { |
| |
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, dst6) |
| |
&& !in6_mcmatch(in6p, dst6, m->m_pkthdr.rcvif)) |
| |
continue; |
| |
} |
| |
#ifndef INET6_BINDV6ONLY |
| |
else { |
| |
if (IN6_IS_ADDR_V4MAPPED(dst6) |
| |
&& (in6p->in6p_flags & IN6P_BINDV6ONLY)) |
| |
continue; |
| |
} |
| |
#endif |
| |
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { |
| |
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6) |
| |
|| in6p->in6p_fport != *sport) |
| |
continue; |
| |
} |
| |
#ifndef INET6_BINDV6ONLY |
| |
else { |
| |
if (IN6_IS_ADDR_V4MAPPED(src6) |
| |
&& (in6p->in6p_flags & IN6P_BINDV6ONLY)) |
| |
continue; |
| |
} |
| |
#endif |
| |
|
| |
last = in6p; |
| |
udp6_sendup(m, off, (struct sockaddr *)src, |
| |
in6p->in6p_socket); |
| |
rcvcnt++; |
| |
|
| |
/* |
| |
* 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 ((in6p->in6p_socket->so_options & |
| |
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
| |
break; |
| |
} |
| |
|
| |
#if 0 |
| |
if (last == NULL) { |
| |
/* |
| |
* No matching pcb found; discard datagram. |
| |
* (No need to send an ICMP Port Unreachable |
| |
* for a broadcast or multicast datgram.) |
| |
*/ |
| |
switch (af) { |
| |
case AF_INET: |
| |
udpstat.udps_noportbcast++; |
| |
break; |
| |
case AF_INET6: |
| |
udp6stat.udp6s_noportmcast++; |
| |
break; |
| |
} |
| |
goto bad; |
| |
} |
| |
#endif |
| |
} else { |
| |
/* |
| |
* Locate pcb for datagram. |
| |
*/ |
| |
in6p = in6_pcblookup_connect(&udb6, src6, *sport, |
| |
dst6, *dport, 0); |
| |
if (in6p == 0) { |
| |
++udpstat.udps_pcbhashmiss; |
| |
in6p = in6_pcblookup_bind(&udb6, dst6, *dport, 0); |
| |
if (in6p == 0) { |
| |
#if 0 |
| |
struct mbuf *n; |
| |
n = m_copy(m, 0, M_COPYALL); |
| |
switch (af) { |
| |
case AF_INET: |
| |
if (m->m_flags & (M_BCAST | M_MCAST)) { |
| |
udpstat.udps_noportbcast++; |
| |
goto bad; |
| |
} |
| |
udpstat.udps_noport++; |
| |
if (n != NULL) |
| |
icmp_error(n, ICMP_UNREACH, |
| |
ICMP_UNREACH_PORT, 0, 0); |
| |
break; |
| |
case AF_INET6: |
| |
if (m->m_flags & M_MCAST) { |
| |
udp6stat.udp6s_noportmcast++; |
| |
goto bad; |
| |
} |
| |
udp6stat.udp6s_noport++; |
| |
if (n != NULL) |
| |
icmp6_error(n, ICMP6_DST_UNREACH, |
| |
ICMP6_DST_UNREACH_NOPORT, 0); |
| |
break; |
| |
} |
| |
#endif |
| |
|
| |
return rcvcnt; |
| |
} |
| |
} |
| |
|
| |
udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); |
| |
rcvcnt++; |
| |
} |
| |
|
| |
bad: |
| |
return rcvcnt; |
| |
} |
| |
#endif |
| |
|
| |
#else /*UDP6*/ |
| |
|
| void |
void |
| #if __STDC__ |
#if __STDC__ |
| Line 142 udp_input(m, va_alist) |
|
| Line 874 udp_input(m, va_alist) |
|
| #endif |
#endif |
| { |
{ |
| int proto; |
int proto; |
| register struct ip *ip; |
struct ip *ip; |
| register struct udphdr *uh; |
struct udphdr *uh; |
| register struct inpcb *inp; |
struct inpcb *inp; |
| struct mbuf *opts = 0; |
struct mbuf *opts = 0; |
| int len; |
int len; |
| struct ip save_ip; |
struct ip save_ip; |
| int iphlen; |
int iphlen; |
| va_list ap; |
va_list ap; |
| struct sockaddr_in udpsrc; |
struct sockaddr_in udpsrc; |
| #ifdef MAPPED_ADDR_ENABLED |
|
| struct sockaddr_in6 mapped; |
|
| #endif |
|
| struct sockaddr *sa; |
struct sockaddr *sa; |
| |
|
| va_start(ap, m); |
va_start(ap, m); |
| Line 187 udp_input(m, va_alist) |
|
| Line 916 udp_input(m, va_alist) |
|
| } |
} |
| uh = (struct udphdr *)((caddr_t)ip + iphlen); |
uh = (struct udphdr *)((caddr_t)ip + iphlen); |
| |
|
| |
/* destination port of 0 is illegal, based on RFC768. */ |
| |
if (uh->uh_dport == 0) |
| |
goto bad; |
| |
|
| /* |
/* |
| * Make mbuf data length reflect UDP length. |
* Make mbuf data length reflect UDP length. |
| * If not enough data to reflect UDP length, drop. |
* If not enough data to reflect UDP length, drop. |
| */ |
*/ |
| len = ntohs((u_int16_t)uh->uh_ulen); |
len = ntohs((u_int16_t)uh->uh_ulen); |
| if (ip->ip_len != iphlen + len) { |
if (ip->ip_len != iphlen + len) { |
| if (ip->ip_len < iphlen + len) { |
if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) { |
| udpstat.udps_badlen++; |
udpstat.udps_badlen++; |
| goto bad; |
goto bad; |
| } |
} |
| Line 250 udp_input(m, va_alist) |
|
| Line 983 udp_input(m, va_alist) |
|
| iphlen += sizeof(struct udphdr); |
iphlen += sizeof(struct udphdr); |
| /* |
/* |
| * KAME note: usually we drop udpiphdr from mbuf here. |
* KAME note: usually we drop udpiphdr from mbuf here. |
| * we need udpiphdr for iPsec processing so we do that later. |
* we need udpiphdr for IPsec processing so we do that later. |
| */ |
*/ |
| /* |
/* |
| * Locate pcb(s) for datagram. |
* Locate pcb(s) for datagram. |
| Line 291 udp_input(m, va_alist) |
|
| Line 1024 udp_input(m, va_alist) |
|
| } |
} |
| m_adj(n, iphlen); |
m_adj(n, iphlen); |
| sa = (struct sockaddr *)&udpsrc; |
sa = (struct sockaddr *)&udpsrc; |
| #ifdef MAPPED_ADDR_ENABLED |
|
| if (last->inp_socket->so_proto-> |
|
| pr_domain->dom_family == AF_INET6) { |
|
| in6_sin_2_v4mapsin6(&udpsrc, |
|
| &mapped); |
|
| sa = (struct sockaddr *)&mapped; |
|
| } |
|
| #endif /* MAPPED_ADDR_ENABLED */ |
|
| if (sbappendaddr( |
if (sbappendaddr( |
| &last->inp_socket->so_rcv, |
&last->inp_socket->so_rcv, |
| sa, n, opts) == 0) { |
sa, n, opts) == 0) { |
| Line 330 udp_input(m, va_alist) |
|
| Line 1055 udp_input(m, va_alist) |
|
| * (No need to send an ICMP Port Unreachable |
* (No need to send an ICMP Port Unreachable |
| * for a broadcast or multicast datgram.) |
* for a broadcast or multicast datgram.) |
| */ |
*/ |
| udpstat.udps_noport++; |
|
| udpstat.udps_noportbcast++; |
udpstat.udps_noportbcast++; |
| goto bad; |
goto bad; |
| } |
} |
| Line 348 udp_input(m, va_alist) |
|
| Line 1072 udp_input(m, va_alist) |
|
| m->m_pkthdr.len -= iphlen; |
m->m_pkthdr.len -= iphlen; |
| m->m_data += iphlen; |
m->m_data += iphlen; |
| sa = (struct sockaddr *)&udpsrc; |
sa = (struct sockaddr *)&udpsrc; |
| #ifdef MAPPED_ADDR_ENABLED |
|
| if (last->inp_socket->so_proto->pr_domain->dom_family == |
|
| AF_INET6) { |
|
| in6_sin_2_v4mapsin6(&udpsrc, &mapped); |
|
| sa = (struct sockaddr *)&mapped; |
|
| } |
|
| #endif /* MAPPED_ADDR_ENABLED */ |
|
| if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) { |
if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) { |
| udpstat.udps_fullsock++; |
udpstat.udps_fullsock++; |
| goto bad; |
goto bad; |
| Line 371 udp_input(m, va_alist) |
|
| Line 1088 udp_input(m, va_alist) |
|
| ++udpstat.udps_pcbhashmiss; |
++udpstat.udps_pcbhashmiss; |
| inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); |
inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); |
| if (inp == 0) { |
if (inp == 0) { |
| udpstat.udps_noport++; |
|
| if (m->m_flags & (M_BCAST | M_MCAST)) { |
if (m->m_flags & (M_BCAST | M_MCAST)) { |
| udpstat.udps_noportbcast++; |
udpstat.udps_noportbcast++; |
| goto bad; |
goto bad; |
| } |
} |
| |
udpstat.udps_noport++; |
| *ip = save_ip; |
*ip = save_ip; |
| #if NIPKDB > 0 |
#ifdef IPKDB |
| if (checkipkdb(&ip->ip_src, |
if (checkipkdb(&ip->ip_src, |
| uh->uh_sport, |
uh->uh_sport, |
| uh->uh_dport, |
uh->uh_dport, |
| Line 409 udp_input(m, va_alist) |
|
| Line 1126 udp_input(m, va_alist) |
|
| m->m_pkthdr.len -= iphlen; |
m->m_pkthdr.len -= iphlen; |
| m->m_data += iphlen; |
m->m_data += iphlen; |
| sa = (struct sockaddr *)&udpsrc; |
sa = (struct sockaddr *)&udpsrc; |
| #ifdef MAPPED_ADDR_ENABLED |
|
| if (inp->inp_socket->so_proto->pr_domain->dom_family == AF_INET6) { |
|
| in6_sin_2_v4mapsin6(&udpsrc, &mapped); |
|
| sa = (struct sockaddr *)&mapped; |
|
| } |
|
| #endif /* MAPPED_ADDR_ENABLED */ |
|
| if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) { |
if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) { |
| udpstat.udps_fullsock++; |
udpstat.udps_fullsock++; |
| goto bad; |
goto bad; |
|
|
| if (opts) |
if (opts) |
| m_freem(opts); |
m_freem(opts); |
| } |
} |
| |
#endif /*UDP6*/ |
| |
|
| |
#ifdef INET |
| /* |
/* |
| * Notify a udp user of an asynchronous error; |
* Notify a udp user of an asynchronous error; |
| * just wake up so that he can collect error status. |
* just wake up so that he can collect error status. |
| */ |
*/ |
| static void |
static void |
| udp_notify(inp, errno) |
udp_notify(inp, errno) |
| register struct inpcb *inp; |
struct inpcb *inp; |
| int errno; |
int errno; |
| { |
{ |
| |
|
| Line 448 udp_ctlinput(cmd, sa, v) |
|
| Line 1161 udp_ctlinput(cmd, sa, v) |
|
| struct sockaddr *sa; |
struct sockaddr *sa; |
| void *v; |
void *v; |
| { |
{ |
| register struct ip *ip = v; |
struct ip *ip = v; |
| register struct udphdr *uh; |
struct udphdr *uh; |
| extern int inetctlerrmap[]; |
|
| void (*notify) __P((struct inpcb *, int)) = udp_notify; |
void (*notify) __P((struct inpcb *, int)) = udp_notify; |
| int errno; |
int errno; |
| |
|
| if (sa->sa_family != AF_INET || |
if (sa->sa_family != AF_INET |
| sa->sa_len != sizeof(struct sockaddr_in)) |
|| sa->sa_len != sizeof(struct sockaddr_in)) |
| return NULL; |
return NULL; |
| if ((unsigned)cmd >= PRC_NCMDS) |
if ((unsigned)cmd >= PRC_NCMDS) |
| return NULL; |
return NULL; |
| Line 470 udp_ctlinput(cmd, sa, v) |
|
| Line 1182 udp_ctlinput(cmd, sa, v) |
|
| uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); |
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); |
| in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, |
in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, |
| ip->ip_src, uh->uh_sport, errno, notify); |
ip->ip_src, uh->uh_sport, errno, notify); |
| |
|
| |
/* XXX mapped address case */ |
| } else |
} else |
| in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, |
in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, |
| notify); |
notify); |
| Line 485 udp_output(m, va_alist) |
|
| Line 1199 udp_output(m, va_alist) |
|
| va_dcl |
va_dcl |
| #endif |
#endif |
| { |
{ |
| register struct inpcb *inp; |
struct inpcb *inp; |
| register struct udpiphdr *ui; |
struct udpiphdr *ui; |
| register int len = m->m_pkthdr.len; |
int len = m->m_pkthdr.len; |
| int error = 0; |
int error = 0; |
| va_list ap; |
va_list ap; |
| |
|
| Line 542 udp_output(m, va_alist) |
|
| Line 1256 udp_output(m, va_alist) |
|
| udpstat.udps_opackets++; |
udpstat.udps_opackets++; |
| |
|
| #ifdef IPSEC |
#ifdef IPSEC |
| m->m_pkthdr.rcvif = (struct ifnet *)inp->inp_socket; |
if (ipsec_setsocket(m, inp->inp_socket) != 0) { |
| |
error = ENOBUFS; |
| |
goto release; |
| |
} |
| #endif /*IPSEC*/ |
#endif /*IPSEC*/ |
| |
|
| return (ip_output(m, inp->inp_options, &inp->inp_route, |
return (ip_output(m, inp->inp_options, &inp->inp_route, |
| Line 566 udp_usrreq(so, req, m, nam, control, p) |
|
| Line 1283 udp_usrreq(so, req, m, nam, control, p) |
|
| struct mbuf *m, *nam, *control; |
struct mbuf *m, *nam, *control; |
| struct proc *p; |
struct proc *p; |
| { |
{ |
| register struct inpcb *inp; |
struct inpcb *inp; |
| int s; |
int s; |
| register int error = 0; |
int error = 0; |
| |
|
| if (req == PRU_CONTROL) |
if (req == PRU_CONTROL) |
| return (in_control(so, (long)m, (caddr_t)nam, |
return (in_control(so, (long)m, (caddr_t)nam, |
| (struct ifnet *)control, p)); |
(struct ifnet *)control, p)); |
| |
|
| |
if (req == PRU_PURGEIF) { |
| |
in_purgeif((struct ifnet *)control); |
| |
in_pcbpurgeif(&udbtable, (struct ifnet *)control); |
| |
return (0); |
| |
} |
| |
|
| s = splsoftnet(); |
s = splsoftnet(); |
| inp = sotoinpcb(so); |
inp = sotoinpcb(so); |
| #ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
| Line 607 udp_usrreq(so, req, m, nam, control, p) |
|
| Line 1330 udp_usrreq(so, req, m, nam, control, p) |
|
| inp = sotoinpcb(so); |
inp = sotoinpcb(so); |
| inp->inp_ip.ip_ttl = ip_defttl; |
inp->inp_ip.ip_ttl = ip_defttl; |
| #ifdef IPSEC |
#ifdef IPSEC |
| inp = (struct inpcb *)so->so_pcb; |
error = ipsec_init_policy(so, &inp->inp_sp); |
| if ((error = ipsec_init_policy(&inp->inp_sp)) != 0) |
if (error != 0) { |
| in_pcbdetach(inp); |
in_pcbdetach(inp); |
| |
break; |
| |
} |
| #endif /*IPSEC*/ |
#endif /*IPSEC*/ |
| break; |
break; |
| |
|
| Line 753 udp_sysctl(name, namelen, oldp, oldlenp, |
|
| Line 1478 udp_sysctl(name, namelen, oldp, oldlenp, |
|
| } |
} |
| /* NOTREACHED */ |
/* NOTREACHED */ |
| } |
} |
| |
#endif |