version 1.50, 1999/07/09 22:57:23 |
version 1.52.2.2, 2000/12/08 09:18:43 |
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*/ |
*/ |
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#include "opt_ipsec.h" |
#include "opt_ipsec.h" |
|
#include "opt_ipkdb.h" |
#include "ipkdb.h" |
|
|
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/* XXX MAPPED_ADDR_ENABLED should be revisited */ |
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|
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#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> |
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#endif /* MAPPED_ADDR_ENABLED */ |
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#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> |
|
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#include <vm/vm.h> |
#include <uvm/uvm_extern.h> |
#include <sys/sysctl.h> |
#include <sys/sysctl.h> |
|
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#include <net/if.h> |
#include <net/if.h> |
|
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#include <netinet/udp.h> |
#include <netinet/udp.h> |
#include <netinet/udp_var.h> |
#include <netinet/udp_var.h> |
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|
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#ifdef INET6 |
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#include <netinet/ip6.h> |
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#include <netinet/icmp6.h> |
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#include <netinet6/ip6_var.h> |
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#include <netinet6/in6_pcb.h> |
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#include <netinet6/udp6_var.h> |
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#endif |
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|
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#ifdef PULLDOWN_TEST |
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#ifndef INET6 |
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/* always need ip6.h for IP6_EXTHDR_GET */ |
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#include <netinet/ip6.h> |
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#endif |
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#endif |
|
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#include <machine/stdarg.h> |
#include <machine/stdarg.h> |
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#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*/ |
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|
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#ifdef IPKDB |
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#include <ipkdb/ipkdb.h> |
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#endif |
|
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/* |
/* |
* UDP protocol implementation. |
* UDP protocol implementation. |
* Per RFC 768, August, 1980. |
* Per RFC 768, August, 1980. |
Line 118 int udpcksum = 1; |
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Line 131 int udpcksum = 1; |
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int udpcksum = 0; /* XXX */ |
int udpcksum = 0; /* XXX */ |
#endif |
#endif |
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|
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#ifdef INET |
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static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *, |
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struct socket *)); |
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static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *, |
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struct mbuf *, int)); |
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#endif |
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#ifdef INET6 |
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static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *, |
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struct socket *)); |
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static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, |
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struct ifnet *)); |
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static int udp6_realinput __P((int, struct sockaddr_in6 *, |
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struct sockaddr_in6 *, struct mbuf *, int)); |
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#endif |
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#ifdef INET |
static void udp_notify __P((struct inpcb *, int)); |
static void udp_notify __P((struct inpcb *, int)); |
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#endif |
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#ifndef UDBHASHSIZE |
#ifndef UDBHASHSIZE |
#define UDBHASHSIZE 128 |
#define UDBHASHSIZE 128 |
|
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udp_init() |
udp_init() |
{ |
{ |
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|
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#ifdef INET |
in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
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#endif |
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} |
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|
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#ifndef UDP6 |
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#ifdef INET |
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void |
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#if __STDC__ |
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udp_input(struct mbuf *m, ...) |
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#else |
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udp_input(m, va_alist) |
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struct mbuf *m; |
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va_dcl |
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#endif |
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{ |
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va_list ap; |
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struct sockaddr_in src, dst; |
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struct ip *ip; |
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struct udphdr *uh; |
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int iphlen, proto; |
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int len; |
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int n; |
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|
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va_start(ap, m); |
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iphlen = va_arg(ap, int); |
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proto = va_arg(ap, int); |
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va_end(ap); |
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|
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udpstat.udps_ipackets++; |
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|
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#ifndef PULLDOWN_TEST |
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/* |
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* Strip IP options, if any; should skip this, |
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* make available to user, and use on returned packets, |
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* but we don't yet have a way to check the checksum |
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* with options still present. |
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*/ |
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if (iphlen > sizeof (struct ip)) { |
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ip_stripoptions(m, (struct mbuf *)0); |
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iphlen = sizeof(struct ip); |
|
} |
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#else |
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/* |
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* we may enable the above code if we save and pass IPv4 options |
|
* to the userland. |
|
*/ |
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#endif |
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|
|
/* |
|
* Get IP and UDP header together in first mbuf. |
|
*/ |
|
ip = mtod(m, struct ip *); |
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#ifndef PULLDOWN_TEST |
|
if (m->m_len < iphlen + sizeof(struct udphdr)) { |
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if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { |
|
udpstat.udps_hdrops++; |
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return; |
|
} |
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ip = mtod(m, struct ip *); |
|
} |
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uh = (struct udphdr *)((caddr_t)ip + iphlen); |
|
#else |
|
IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); |
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if (uh == NULL) { |
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udpstat.udps_hdrops++; |
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return; |
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} |
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#endif |
|
|
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/* destination port of 0 is illegal, based on RFC768. */ |
|
if (uh->uh_dport == 0) |
|
goto bad; |
|
|
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/* |
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* 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)) { |
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udpstat.udps_badlen++; |
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goto bad; |
|
} |
|
m_adj(m, iphlen + len - ip->ip_len); |
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} |
|
|
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/* |
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* Checksum extended UDP header and data. |
|
*/ |
|
if (uh->uh_sum) { |
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if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) { |
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udpstat.udps_badsum++; |
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m_freem(m); |
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return; |
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} |
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} |
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|
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/* construct source and dst sockaddrs. */ |
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bzero(&src, sizeof(src)); |
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src.sin_family = AF_INET; |
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src.sin_len = sizeof(struct sockaddr_in); |
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bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr)); |
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src.sin_port = uh->uh_sport; |
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bzero(&dst, sizeof(dst)); |
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dst.sin_family = AF_INET; |
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dst.sin_len = sizeof(struct sockaddr_in); |
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bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr)); |
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dst.sin_port = uh->uh_dport; |
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|
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n = udp4_realinput(&src, &dst, m, iphlen); |
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#ifdef INET6 |
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if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { |
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struct sockaddr_in6 src6, dst6; |
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|
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bzero(&src6, sizeof(src6)); |
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src6.sin6_family = AF_INET6; |
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src6.sin6_len = sizeof(struct sockaddr_in6); |
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src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; |
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bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12], |
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sizeof(ip->ip_src)); |
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src6.sin6_port = uh->uh_sport; |
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bzero(&dst6, sizeof(dst6)); |
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dst6.sin6_family = AF_INET6; |
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dst6.sin6_len = sizeof(struct sockaddr_in6); |
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dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; |
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bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12], |
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sizeof(ip->ip_dst)); |
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dst6.sin6_port = uh->uh_dport; |
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|
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n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); |
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} |
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#endif |
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if (n == 0) { |
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if (m->m_flags & (M_BCAST | M_MCAST)) { |
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udpstat.udps_noportbcast++; |
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goto bad; |
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} |
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udpstat.udps_noport++; |
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#ifdef IPKDB |
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if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, |
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m, iphlen + sizeof(struct udphdr), |
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m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { |
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/* |
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* It was a debugger connect packet, |
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* just drop it now |
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*/ |
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goto bad; |
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} |
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#endif |
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icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); |
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m = NULL; |
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} |
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bad: |
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if (m) |
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m_freem(m); |
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} |
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#endif |
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#ifdef INET6 |
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int |
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udp6_input(mp, offp, proto) |
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struct mbuf **mp; |
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int *offp, proto; |
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{ |
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struct mbuf *m = *mp; |
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int off = *offp; |
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struct sockaddr_in6 src, dst; |
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struct ip6_hdr *ip6; |
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struct udphdr *uh; |
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u_int32_t plen, ulen; |
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#if defined(NFAITH) && 0 < NFAITH |
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if (m->m_pkthdr.rcvif) { |
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if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { |
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/* send icmp6 host unreach? */ |
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m_freem(m); |
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return IPPROTO_DONE; |
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} |
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} |
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#endif |
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udp6stat.udp6s_ipackets++; |
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#ifndef PULLDOWN_TEST |
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IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); |
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#endif |
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ip6 = mtod(m, struct ip6_hdr *); |
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/* check for jumbogram is done in ip6_input. we can trust pkthdr.len */ |
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plen = m->m_pkthdr.len - off; |
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#ifndef PULLDOWN_TEST |
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uh = (struct udphdr *)((caddr_t)ip6 + off); |
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#else |
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IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); |
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if (uh == NULL) { |
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ip6stat.ip6s_tooshort++; |
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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 |
|
|| sa->sa_len != sizeof(struct sockaddr_in)) |
|
return NULL; |
if ((unsigned)cmd >= PRC_NCMDS) |
if ((unsigned)cmd >= PRC_NCMDS) |
return NULL; |
return NULL; |
errno = inetctlerrmap[cmd]; |
errno = inetctlerrmap[cmd]; |
Line 467 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 482 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 539 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; |
ipsec_setsocket(m, inp->inp_socket); |
#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 563 udp_usrreq(so, req, m, nam, control, p) |
|
Line 1280 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 604 udp_usrreq(so, req, m, nam, control, p) |
|
Line 1327 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); |
error = ipsec_init_policy(&inp->inp_sp); |
if (error != 0) { |
|
in_pcbdetach(inp); |
|
break; |
|
} |
#endif /*IPSEC*/ |
#endif /*IPSEC*/ |
break; |
break; |
|
|
Line 749 udp_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1475 udp_sysctl(name, namelen, oldp, oldlenp, |
|
} |
} |
/* NOTREACHED */ |
/* NOTREACHED */ |
} |
} |
|
#endif |