version 1.176, 2009/03/18 17:06:52 |
version 1.202, 2014/07/01 05:49:18 |
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* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 |
* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 |
*/ |
*/ |
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|
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/* |
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* UDP protocol implementation. |
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* Per RFC 768, August, 1980. |
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*/ |
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#include <sys/cdefs.h> |
#include <sys/cdefs.h> |
__KERNEL_RCSID(0, "$NetBSD$"); |
__KERNEL_RCSID(0, "$NetBSD$"); |
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Line 71 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 76 __KERNEL_RCSID(0, "$NetBSD$"); |
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#include "opt_mbuftrace.h" |
#include "opt_mbuftrace.h" |
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#include <sys/param.h> |
#include <sys/param.h> |
#include <sys/malloc.h> |
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#include <sys/mbuf.h> |
#include <sys/mbuf.h> |
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#include <sys/once.h> |
#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/errno.h> |
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#include <sys/stat.h> |
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#include <sys/systm.h> |
#include <sys/systm.h> |
#include <sys/proc.h> |
#include <sys/proc.h> |
#include <sys/domain.h> |
#include <sys/domain.h> |
Line 105 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 108 __KERNEL_RCSID(0, "$NetBSD$"); |
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#include <netinet6/in6_pcb.h> |
#include <netinet6/in6_pcb.h> |
#include <netinet6/udp6_var.h> |
#include <netinet6/udp6_var.h> |
#include <netinet6/udp6_private.h> |
#include <netinet6/udp6_private.h> |
#include <netinet6/scope6_var.h> |
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#endif |
#endif |
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#ifndef INET6 |
#ifndef INET6 |
Line 113 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 115 __KERNEL_RCSID(0, "$NetBSD$"); |
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#include <netinet/ip6.h> |
#include <netinet/ip6.h> |
#endif |
#endif |
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#include "faith.h" |
#ifdef IPSEC |
#if defined(NFAITH) && NFAITH > 0 |
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#include <net/if_faith.h> |
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#endif |
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#include <machine/stdarg.h> |
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#ifdef FAST_IPSEC |
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#include <netipsec/ipsec.h> |
#include <netipsec/ipsec.h> |
#include <netipsec/ipsec_var.h> |
#include <netipsec/ipsec_var.h> |
#include <netipsec/ipsec_private.h> |
#include <netipsec/ipsec_private.h> |
Line 128 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 123 __KERNEL_RCSID(0, "$NetBSD$"); |
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#ifdef INET6 |
#ifdef INET6 |
#include <netipsec/ipsec6.h> |
#include <netipsec/ipsec6.h> |
#endif |
#endif |
#endif /* FAST_IPSEC */ |
#endif /* IPSEC */ |
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#ifdef IPSEC |
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#include <netinet6/ipsec.h> |
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#include <netinet6/ipsec_private.h> |
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#include <netinet6/esp.h> |
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#include <netkey/key.h> |
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#endif /* IPSEC */ |
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#ifdef COMPAT_50 |
#ifdef COMPAT_50 |
#include <compat/sys/socket.h> |
#include <compat/sys/socket.h> |
Line 145 __KERNEL_RCSID(0, "$NetBSD$"); |
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Line 133 __KERNEL_RCSID(0, "$NetBSD$"); |
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#include <ipkdb/ipkdb.h> |
#include <ipkdb/ipkdb.h> |
#endif |
#endif |
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/* |
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* UDP protocol implementation. |
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* Per RFC 768, August, 1980. |
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*/ |
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int udpcksum = 1; |
int udpcksum = 1; |
int udp_do_loopback_cksum = 0; |
int udp_do_loopback_cksum = 0; |
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Line 157 struct inpcbtable udbtable; |
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Line 141 struct inpcbtable udbtable; |
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percpu_t *udpstat_percpu; |
percpu_t *udpstat_percpu; |
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#ifdef INET |
#ifdef INET |
#ifdef IPSEC_NAT_T |
#ifdef IPSEC |
static int udp4_espinudp (struct mbuf **, int, struct sockaddr *, |
static int udp4_espinudp (struct mbuf **, int, struct sockaddr *, |
struct socket *); |
struct socket *); |
#endif |
#endif |
Line 167 static int udp4_realinput (struct sockad |
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Line 151 static int udp4_realinput (struct sockad |
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struct mbuf **, int); |
struct mbuf **, int); |
static int udp4_input_checksum(struct mbuf *, const struct udphdr *, int, int); |
static int udp4_input_checksum(struct mbuf *, const struct udphdr *, int, int); |
#endif |
#endif |
#ifdef INET6 |
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static void udp6_sendup (struct mbuf *, int, struct sockaddr *, |
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struct socket *); |
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static int udp6_realinput (int, struct sockaddr_in6 *, |
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struct sockaddr_in6 *, struct mbuf *, int); |
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static int udp6_input_checksum(struct mbuf *, const struct udphdr *, int, int); |
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#endif |
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#ifdef INET |
#ifdef INET |
static void udp_notify (struct inpcb *, int); |
static void udp_notify (struct inpcb *, int); |
#endif |
#endif |
Line 183 static void udp_notify (struct inpcb *, |
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Line 160 static void udp_notify (struct inpcb *, |
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#endif |
#endif |
int udbhashsize = UDBHASHSIZE; |
int udbhashsize = UDBHASHSIZE; |
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/* |
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* For send - really max datagram size; for receive - 40 1K datagrams. |
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*/ |
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static int udp_sendspace = 9216; |
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static int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); |
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#ifdef MBUFTRACE |
#ifdef MBUFTRACE |
struct mowner udp_mowner = MOWNER_INIT("udp", ""); |
struct mowner udp_mowner = MOWNER_INIT("udp", ""); |
struct mowner udp_rx_mowner = MOWNER_INIT("udp", "rx"); |
struct mowner udp_rx_mowner = MOWNER_INIT("udp", "rx"); |
Line 208 EVCNT_ATTACH_STATIC(udp_hwcsum_data); |
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Line 191 EVCNT_ATTACH_STATIC(udp_hwcsum_data); |
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EVCNT_ATTACH_STATIC(udp_swcsum); |
EVCNT_ATTACH_STATIC(udp_swcsum); |
#endif /* defined(INET) */ |
#endif /* defined(INET) */ |
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#if defined(INET6) |
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struct evcnt udp6_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp6", "hwcsum bad"); |
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struct evcnt udp6_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp6", "hwcsum ok"); |
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struct evcnt udp6_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp6", "hwcsum data"); |
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struct evcnt udp6_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp6", "swcsum"); |
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EVCNT_ATTACH_STATIC(udp6_hwcsum_bad); |
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EVCNT_ATTACH_STATIC(udp6_hwcsum_ok); |
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EVCNT_ATTACH_STATIC(udp6_hwcsum_data); |
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EVCNT_ATTACH_STATIC(udp6_swcsum); |
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#endif /* defined(INET6) */ |
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#define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
#define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
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#else |
#else |
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#define UDP_CSUM_COUNTER_INCR(ev) /* nothing */ |
#define UDP_CSUM_COUNTER_INCR(ev) /* nothing */ |
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#endif /* UDP_CSUM_COUNTERS */ |
#endif /* UDP_CSUM_COUNTERS */ |
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void |
static void sysctl_net_inet_udp_setup(struct sysctllog **); |
udp_init(void) |
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static int |
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do_udpinit(void) |
{ |
{ |
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in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
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udpstat_percpu = percpu_alloc(sizeof(uint64_t) * UDP_NSTATS); |
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MOWNER_ATTACH(&udp_tx_mowner); |
MOWNER_ATTACH(&udp_tx_mowner); |
MOWNER_ATTACH(&udp_rx_mowner); |
MOWNER_ATTACH(&udp_rx_mowner); |
MOWNER_ATTACH(&udp_mowner); |
MOWNER_ATTACH(&udp_mowner); |
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#ifdef INET |
return 0; |
udpstat_percpu = percpu_alloc(sizeof(uint64_t) * UDP_NSTATS); |
} |
#endif |
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#ifdef INET6 |
void |
udp6stat_percpu = percpu_alloc(sizeof(uint64_t) * UDP6_NSTATS); |
udp_init_common(void) |
#endif |
{ |
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static ONCE_DECL(doudpinit); |
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RUN_ONCE(&doudpinit, do_udpinit); |
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} |
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void |
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udp_init(void) |
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{ |
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sysctl_net_inet_udp_setup(NULL); |
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udp_init_common(); |
} |
} |
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/* |
/* |
Line 409 udp_input(struct mbuf *m, ...) |
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Line 388 udp_input(struct mbuf *m, ...) |
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UDP_STATINC(UDP_STAT_HDROPS); |
UDP_STATINC(UDP_STAT_HDROPS); |
return; |
return; |
} |
} |
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if (m == NULL) { |
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/* |
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* packet has been processed by ESP stuff - |
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* e.g. dropped NAT-T-keep-alive-packet ... |
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*/ |
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return; |
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} |
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ip = mtod(m, struct ip *); |
#ifdef INET6 |
#ifdef INET6 |
if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { |
if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { |
struct sockaddr_in6 src6, dst6; |
struct sockaddr_in6 src6, dst6; |
Line 417 udp_input(struct mbuf *m, ...) |
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Line 404 udp_input(struct mbuf *m, ...) |
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src6.sin6_family = AF_INET6; |
src6.sin6_family = AF_INET6; |
src6.sin6_len = sizeof(struct sockaddr_in6); |
src6.sin6_len = sizeof(struct sockaddr_in6); |
src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; |
src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; |
memcpy( &src6.sin6_addr.s6_addr[12], &ip->ip_src, |
memcpy(&src6.sin6_addr.s6_addr[12], &ip->ip_src, |
sizeof(ip->ip_src)); |
sizeof(ip->ip_src)); |
src6.sin6_port = uh->uh_sport; |
src6.sin6_port = uh->uh_sport; |
memset(&dst6, 0, sizeof(dst6)); |
memset(&dst6, 0, sizeof(dst6)); |
dst6.sin6_family = AF_INET6; |
dst6.sin6_family = AF_INET6; |
dst6.sin6_len = sizeof(struct sockaddr_in6); |
dst6.sin6_len = sizeof(struct sockaddr_in6); |
dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; |
dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; |
memcpy( &dst6.sin6_addr.s6_addr[12], &ip->ip_dst, |
memcpy(&dst6.sin6_addr.s6_addr[12], &ip->ip_dst, |
sizeof(ip->ip_dst)); |
sizeof(ip->ip_dst)); |
dst6.sin6_port = uh->uh_dport; |
dst6.sin6_port = uh->uh_dport; |
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} |
} |
#endif |
#endif |
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#ifdef INET6 |
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static int |
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udp6_input_checksum(struct mbuf *m, const struct udphdr *uh, int off, int len) |
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{ |
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|
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/* |
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* XXX it's better to record and check if this mbuf is |
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* already checked. |
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*/ |
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if (__predict_false((m->m_flags & M_LOOP) && !udp_do_loopback_cksum)) { |
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goto good; |
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} |
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if (uh->uh_sum == 0) { |
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UDP6_STATINC(UDP6_STAT_NOSUM); |
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goto bad; |
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} |
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switch (m->m_pkthdr.csum_flags & |
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((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv6) | |
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M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { |
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case M_CSUM_UDPv6|M_CSUM_TCP_UDP_BAD: |
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UDP_CSUM_COUNTER_INCR(&udp6_hwcsum_bad); |
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UDP6_STATINC(UDP6_STAT_BADSUM); |
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goto bad; |
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#if 0 /* notyet */ |
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case M_CSUM_UDPv6|M_CSUM_DATA: |
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#endif |
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case M_CSUM_UDPv6: |
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/* Checksum was okay. */ |
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UDP_CSUM_COUNTER_INCR(&udp6_hwcsum_ok); |
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break; |
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default: |
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/* |
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* Need to compute it ourselves. Maybe skip checksum |
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* on loopback interfaces. |
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*/ |
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UDP_CSUM_COUNTER_INCR(&udp6_swcsum); |
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if (in6_cksum(m, IPPROTO_UDP, off, len) != 0) { |
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UDP6_STATINC(UDP6_STAT_BADSUM); |
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goto bad; |
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} |
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} |
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good: |
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return 0; |
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bad: |
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return -1; |
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} |
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int |
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udp6_input(struct mbuf **mp, int *offp, int 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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ip6 = mtod(m, struct ip6_hdr *); |
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#if defined(NFAITH) && 0 < NFAITH |
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if (faithprefix(&ip6->ip6_dst)) { |
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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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#endif |
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UDP6_STATINC(UDP6_STAT_IPACKETS); |
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|
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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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IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); |
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if (uh == NULL) { |
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IP6_STATINC(IP6_STAT_TOOSHORT); |
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return IPPROTO_DONE; |
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} |
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KASSERT(UDP_HDR_ALIGNED_P(uh)); |
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ulen = ntohs((u_short)uh->uh_ulen); |
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/* |
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* RFC2675 section 4: jumbograms will have 0 in the UDP header field, |
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* iff payload length > 0xffff. |
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*/ |
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if (ulen == 0 && plen > 0xffff) |
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ulen = plen; |
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|
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if (plen != ulen) { |
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UDP6_STATINC(UDP6_STAT_BADLEN); |
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goto bad; |
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} |
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|
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/* destination port of 0 is illegal, based on RFC768. */ |
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if (uh->uh_dport == 0) |
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goto bad; |
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/* Be proactive about malicious use of IPv4 mapped address */ |
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if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
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IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
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/* XXX stat */ |
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goto bad; |
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} |
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/* |
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* Checksum extended UDP header and data. Maybe skip checksum |
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* on loopback interfaces. |
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*/ |
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if (udp6_input_checksum(m, uh, off, ulen)) |
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goto bad; |
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/* |
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* Construct source and dst sockaddrs. |
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*/ |
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memset(&src, 0, sizeof(src)); |
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src.sin6_family = AF_INET6; |
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src.sin6_len = sizeof(struct sockaddr_in6); |
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src.sin6_addr = ip6->ip6_src; |
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src.sin6_port = uh->uh_sport; |
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memset(&dst, 0, sizeof(dst)); |
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dst.sin6_family = AF_INET6; |
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dst.sin6_len = sizeof(struct sockaddr_in6); |
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dst.sin6_addr = ip6->ip6_dst; |
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dst.sin6_port = uh->uh_dport; |
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if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { |
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if (m->m_flags & M_MCAST) { |
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UDP6_STATINC(UDP6_STAT_NOPORTMCAST); |
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goto bad; |
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} |
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UDP6_STATINC(UDP6_STAT_NOPORT); |
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icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 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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return IPPROTO_DONE; |
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} |
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#endif |
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#ifdef INET |
#ifdef INET |
static void |
static void |
udp4_sendup(struct mbuf *m, int off /* offset of data portion */, |
udp4_sendup(struct mbuf *m, int off /* offset of data portion */, |
Line 631 udp4_sendup(struct mbuf *m, int off /* o |
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Line 473 udp4_sendup(struct mbuf *m, int off /* o |
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return; |
return; |
} |
} |
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#if defined(IPSEC) || defined(FAST_IPSEC) |
#if defined(IPSEC) |
/* check AH/ESP integrity. */ |
/* check AH/ESP integrity. */ |
if (so != NULL && ipsec4_in_reject_so(m, so)) { |
if (ipsec_used && so != NULL && ipsec4_in_reject_so(m, so)) { |
IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); |
IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); |
if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) |
if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) |
icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT, |
icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT, |
Line 666 udp4_sendup(struct mbuf *m, int off /* o |
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Line 508 udp4_sendup(struct mbuf *m, int off /* o |
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} |
} |
#endif |
#endif |
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#ifdef INET6 |
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static void |
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udp6_sendup(struct mbuf *m, int off /* offset of data portion */, |
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struct sockaddr *src, struct socket *so) |
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{ |
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struct mbuf *opts = NULL; |
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struct mbuf *n; |
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struct in6pcb *in6p = NULL; |
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|
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if (!so) |
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return; |
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if (so->so_proto->pr_domain->dom_family != AF_INET6) |
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return; |
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in6p = sotoin6pcb(so); |
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|
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#if defined(IPSEC) || defined(FAST_IPSEC) |
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/* check AH/ESP integrity. */ |
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if (so != NULL && ipsec6_in_reject_so(m, so)) { |
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IPSEC6_STATINC(IPSEC_STAT_IN_POLVIO); |
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if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) |
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icmp6_error(n, ICMP6_DST_UNREACH, |
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ICMP6_DST_UNREACH_ADMIN, 0); |
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return; |
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} |
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#endif /*IPSEC*/ |
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|
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if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { |
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if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS |
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#ifdef SO_OTIMESTAMP |
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|| in6p->in6p_socket->so_options & SO_OTIMESTAMP |
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#endif |
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|| in6p->in6p_socket->so_options & SO_TIMESTAMP)) { |
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struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *); |
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ip6_savecontrol(in6p, &opts, ip6, n); |
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} |
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|
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m_adj(n, off); |
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if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) { |
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m_freem(n); |
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if (opts) |
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m_freem(opts); |
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so->so_rcv.sb_overflowed++; |
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UDP6_STATINC(UDP6_STAT_FULLSOCK); |
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} else |
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sorwakeup(so); |
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} |
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} |
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#endif |
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|
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#ifdef INET |
#ifdef INET |
static int |
static int |
udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst, |
udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst, |
Line 763 udp4_realinput(struct sockaddr_in *src, |
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Line 556 udp4_realinput(struct sockaddr_in *src, |
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/* |
/* |
* Locate pcb(s) for datagram. |
* Locate pcb(s) for datagram. |
*/ |
*/ |
CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) { |
TAILQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) { |
inp = (struct inpcb *)inph; |
inp = (struct inpcb *)inph; |
if (inp->inp_af != AF_INET) |
if (inp->inp_af != AF_INET) |
continue; |
continue; |
Line 800 udp4_realinput(struct sockaddr_in *src, |
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Line 593 udp4_realinput(struct sockaddr_in *src, |
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/* |
/* |
* Locate pcb for datagram. |
* Locate pcb for datagram. |
*/ |
*/ |
inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport); |
inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, |
|
*dport, 0); |
if (inp == 0) { |
if (inp == 0) { |
UDP_STATINC(UDP_STAT_PCBHASHMISS); |
UDP_STATINC(UDP_STAT_PCBHASHMISS); |
inp = in_pcblookup_bind(&udbtable, *dst4, *dport); |
inp = in_pcblookup_bind(&udbtable, *dst4, *dport); |
Line 808 udp4_realinput(struct sockaddr_in *src, |
|
Line 602 udp4_realinput(struct sockaddr_in *src, |
|
return rcvcnt; |
return rcvcnt; |
} |
} |
|
|
#ifdef IPSEC_NAT_T |
#ifdef IPSEC |
/* Handle ESP over UDP */ |
/* Handle ESP over UDP */ |
if (inp->inp_flags & INP_ESPINUDP_ALL) { |
if (inp->inp_flags & INP_ESPINUDP_ALL) { |
struct sockaddr *sa = (struct sockaddr *)src; |
struct sockaddr *sa = (struct sockaddr *)src; |
Line 836 udp4_realinput(struct sockaddr_in *src, |
|
Line 630 udp4_realinput(struct sockaddr_in *src, |
|
} |
} |
#endif |
#endif |
|
|
udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
|
rcvcnt++; |
|
} |
|
|
|
bad: |
|
return rcvcnt; |
|
} |
|
#endif |
|
|
|
#ifdef INET6 |
|
static int |
|
udp6_realinput(int af, struct sockaddr_in6 *src, struct sockaddr_in6 *dst, |
|
struct mbuf *m, int off) |
|
{ |
|
u_int16_t sport, dport; |
|
int rcvcnt; |
|
struct in6_addr src6, *dst6; |
|
const struct in_addr *dst4; |
|
struct inpcb_hdr *inph; |
|
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; |
|
if (sa6_recoverscope(src) != 0) { |
|
/* XXX: should be impossible. */ |
|
goto bad; |
|
} |
|
sport = src->sin6_port; |
|
|
|
dport = dst->sin6_port; |
|
dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12]; |
|
dst6 = &dst->sin6_addr; |
|
|
|
if (IN6_IS_ADDR_MULTICAST(dst6) || |
|
(af == AF_INET && IN_MULTICAST(dst4->s_addr))) { |
|
/* |
/* |
* Deliver a multicast or broadcast datagram to *all* sockets |
* Check the minimum TTL for socket. |
* 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: traditionally we dropped udpiphdr from mbuf here. |
|
* we need udpiphdr for IPsec processing so we do that later. |
|
*/ |
|
/* |
|
* Locate pcb(s) for datagram. |
|
*/ |
|
CIRCLEQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) { |
|
in6p = (struct in6pcb *)inph; |
|
if (in6p->in6p_af != AF_INET6) |
|
continue; |
|
|
|
if (in6p->in6p_lport != dport) |
|
continue; |
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { |
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, |
|
dst6)) |
|
continue; |
|
} else { |
|
if (IN6_IS_ADDR_V4MAPPED(dst6) && |
|
(in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
|
continue; |
|
} |
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { |
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, |
|
&src6) || in6p->in6p_fport != sport) |
|
continue; |
|
} else { |
|
if (IN6_IS_ADDR_V4MAPPED(&src6) && |
|
(in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
|
continue; |
|
} |
|
|
|
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; |
|
} |
|
} else { |
|
/* |
|
* Locate pcb for datagram. |
|
*/ |
*/ |
in6p = in6_pcblookup_connect(&udbtable, &src6, sport, dst6, |
if (mtod(m, struct ip *)->ip_ttl < inp->inp_ip_minttl) |
dport, 0); |
goto bad; |
if (in6p == 0) { |
|
UDP_STATINC(UDP_STAT_PCBHASHMISS); |
|
in6p = in6_pcblookup_bind(&udbtable, dst6, dport, 0); |
|
if (in6p == 0) |
|
return rcvcnt; |
|
} |
|
|
|
udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); |
udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
rcvcnt++; |
rcvcnt++; |
} |
} |
|
|
Line 1056 udp_ctloutput(int op, struct socket *so, |
|
Line 736 udp_ctloutput(int op, struct socket *so, |
|
break; |
break; |
|
|
switch(optval) { |
switch(optval) { |
#ifdef IPSEC_NAT_T |
|
case 0: |
case 0: |
inp->inp_flags &= ~INP_ESPINUDP_ALL; |
inp->inp_flags &= ~INP_ESPINUDP_ALL; |
break; |
break; |
Line 1070 udp_ctloutput(int op, struct socket *so, |
|
Line 749 udp_ctloutput(int op, struct socket *so, |
|
inp->inp_flags &= ~INP_ESPINUDP_ALL; |
inp->inp_flags &= ~INP_ESPINUDP_ALL; |
inp->inp_flags |= INP_ESPINUDP_NON_IKE; |
inp->inp_flags |= INP_ESPINUDP_NON_IKE; |
break; |
break; |
#endif |
|
default: |
default: |
error = EINVAL; |
error = EINVAL; |
break; |
break; |
} |
} |
break; |
break; |
|
|
default: |
default: |
error = ENOPROTOOPT; |
error = ENOPROTOOPT; |
break; |
break; |
|
|
return (error); |
return (error); |
} |
} |
|
|
int udp_sendspace = 9216; /* really max datagram size */ |
static int |
int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); |
udp_attach(struct socket *so, int proto) |
/* 40 1K datagrams */ |
{ |
|
struct inpcb *inp; |
|
int error; |
|
|
/*ARGSUSED*/ |
KASSERT(sotoinpcb(so) == NULL); |
int |
|
|
/* Assign the lock (must happen even if we will error out). */ |
|
sosetlock(so); |
|
|
|
#ifdef MBUFTRACE |
|
so->so_mowner = &udp_mowner; |
|
so->so_rcv.sb_mowner = &udp_rx_mowner; |
|
so->so_snd.sb_mowner = &udp_tx_mowner; |
|
#endif |
|
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { |
|
error = soreserve(so, udp_sendspace, udp_recvspace); |
|
if (error) { |
|
return error; |
|
} |
|
} |
|
|
|
error = in_pcballoc(so, &udbtable); |
|
if (error) { |
|
return error; |
|
} |
|
inp = sotoinpcb(so); |
|
inp->inp_ip.ip_ttl = ip_defttl; |
|
KASSERT(solocked(so)); |
|
|
|
return error; |
|
} |
|
|
|
static void |
|
udp_detach(struct socket *so) |
|
{ |
|
struct inpcb *inp; |
|
|
|
KASSERT(solocked(so)); |
|
inp = sotoinpcb(so); |
|
KASSERT(inp != NULL); |
|
in_pcbdetach(inp); |
|
} |
|
|
|
static int |
|
udp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) |
|
{ |
|
return in_control(so, cmd, nam, ifp); |
|
} |
|
|
|
static int |
udp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, |
udp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, |
struct mbuf *control, struct lwp *l) |
struct mbuf *control, struct lwp *l) |
{ |
{ |
struct inpcb *inp; |
struct inpcb *inp; |
int s; |
int s, error = 0; |
int error = 0; |
|
|
|
if (req == PRU_CONTROL) |
KASSERT(req != PRU_ATTACH); |
return (in_control(so, (long)m, (void *)nam, |
KASSERT(req != PRU_DETACH); |
(struct ifnet *)control, l)); |
KASSERT(req != PRU_CONTROL); |
|
|
s = splsoftnet(); |
s = splsoftnet(); |
|
|
if (req == PRU_PURGEIF) { |
if (req == PRU_PURGEIF) { |
mutex_enter(softnet_lock); |
mutex_enter(softnet_lock); |
in_pcbpurgeif0(&udbtable, (struct ifnet *)control); |
in_pcbpurgeif0(&udbtable, (struct ifnet *)control); |
Line 1197 udp_usrreq(struct socket *so, int req, s |
|
Line 919 udp_usrreq(struct socket *so, int req, s |
|
in_pcbpurgeif(&udbtable, (struct ifnet *)control); |
in_pcbpurgeif(&udbtable, (struct ifnet *)control); |
mutex_exit(softnet_lock); |
mutex_exit(softnet_lock); |
splx(s); |
splx(s); |
return (0); |
return 0; |
} |
} |
|
|
|
KASSERT(solocked(so)); |
inp = sotoinpcb(so); |
inp = sotoinpcb(so); |
#ifdef DIAGNOSTIC |
|
if (req != PRU_SEND && req != PRU_SENDOOB && control) |
KASSERT(!control || (req == PRU_SEND || req == PRU_SENDOOB)); |
panic("udp_usrreq: unexpected control mbuf"); |
if (inp == NULL) { |
#endif |
splx(s); |
if (req == PRU_ATTACH) { |
return EINVAL; |
sosetlock(so); |
|
} else if (inp == 0) { |
|
error = EINVAL; |
|
goto release; |
|
} |
} |
|
|
/* |
/* |
Line 1217 udp_usrreq(struct socket *so, int req, s |
|
Line 936 udp_usrreq(struct socket *so, int req, s |
|
* the udp pcb queue and/or pcb addresses. |
* the udp pcb queue and/or pcb addresses. |
*/ |
*/ |
switch (req) { |
switch (req) { |
|
|
case PRU_ATTACH: |
|
if (inp != 0) { |
|
error = EISCONN; |
|
break; |
|
} |
|
#ifdef MBUFTRACE |
|
so->so_mowner = &udp_mowner; |
|
so->so_rcv.sb_mowner = &udp_rx_mowner; |
|
so->so_snd.sb_mowner = &udp_tx_mowner; |
|
#endif |
|
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { |
|
error = soreserve(so, udp_sendspace, udp_recvspace); |
|
if (error) |
|
break; |
|
} |
|
error = in_pcballoc(so, &udbtable); |
|
if (error) |
|
break; |
|
inp = sotoinpcb(so); |
|
inp->inp_ip.ip_ttl = ip_defttl; |
|
break; |
|
|
|
case PRU_DETACH: |
|
in_pcbdetach(inp); |
|
break; |
|
|
|
case PRU_BIND: |
case PRU_BIND: |
error = in_pcbbind(inp, nam, l); |
error = in_pcbbind(inp, nam, l); |
break; |
break; |
Line 1289 udp_usrreq(struct socket *so, int req, s |
|
Line 981 udp_usrreq(struct socket *so, int req, s |
|
{ |
{ |
struct in_addr laddr; /* XXX */ |
struct in_addr laddr; /* XXX */ |
|
|
|
memset(&laddr, 0, sizeof laddr); |
if (nam) { |
if (nam) { |
laddr = inp->inp_laddr; /* XXX */ |
laddr = inp->inp_laddr; /* XXX */ |
if ((so->so_state & SS_ISCONNECTED) != 0) { |
if ((so->so_state & SS_ISCONNECTED) != 0) { |
Line 1345 udp_usrreq(struct socket *so, int req, s |
|
Line 1038 udp_usrreq(struct socket *so, int req, s |
|
default: |
default: |
panic("udp_usrreq"); |
panic("udp_usrreq"); |
} |
} |
|
|
release: |
|
splx(s); |
splx(s); |
return (error); |
|
|
return error; |
} |
} |
|
|
static int |
static int |
Line 1361 sysctl_net_inet_udp_stats(SYSCTLFN_ARGS) |
|
Line 1053 sysctl_net_inet_udp_stats(SYSCTLFN_ARGS) |
|
/* |
/* |
* Sysctl for udp variables. |
* Sysctl for udp variables. |
*/ |
*/ |
SYSCTL_SETUP(sysctl_net_inet_udp_setup, "sysctl net.inet.udp subtree setup") |
static void |
|
sysctl_net_inet_udp_setup(struct sysctllog **clog) |
{ |
{ |
|
|
sysctl_createv(clog, 0, NULL, NULL, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLFLAG_PERMANENT, |
CTLFLAG_PERMANENT, |
CTLTYPE_NODE, "net", NULL, |
|
NULL, 0, NULL, 0, |
|
CTL_NET, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_NODE, "inet", NULL, |
CTLTYPE_NODE, "inet", NULL, |
NULL, 0, NULL, 0, |
NULL, 0, NULL, 0, |
CTL_NET, PF_INET, CTL_EOL); |
CTL_NET, PF_INET, CTL_EOL); |
Line 1434 udp_statinc(u_int stat) |
|
Line 1122 udp_statinc(u_int stat) |
|
UDP_STATINC(stat); |
UDP_STATINC(stat); |
} |
} |
|
|
#if (defined INET && defined IPSEC_NAT_T) |
#if defined(INET) && defined(IPSEC) |
/* |
/* |
* Returns: |
* Returns: |
* 1 if the packet was processed |
* 1 if the packet was processed |
Line 1452 udp4_espinudp(struct mbuf **mp, int off, |
|
Line 1140 udp4_espinudp(struct mbuf **mp, int off, |
|
size_t minlen; |
size_t minlen; |
size_t iphdrlen; |
size_t iphdrlen; |
struct ip *ip; |
struct ip *ip; |
struct mbuf *n; |
|
struct m_tag *tag; |
struct m_tag *tag; |
struct udphdr *udphdr; |
struct udphdr *udphdr; |
u_int16_t sport, dport; |
u_int16_t sport, dport; |
Line 1480 udp4_espinudp(struct mbuf **mp, int off, |
|
Line 1167 udp4_espinudp(struct mbuf **mp, int off, |
|
|
|
/* Ignore keepalive packets */ |
/* Ignore keepalive packets */ |
if ((len == 1) && (*(unsigned char *)data == 0xff)) { |
if ((len == 1) && (*(unsigned char *)data == 0xff)) { |
|
m_free(m); |
|
*mp = NULL; /* avoid any further processiong by caller ... */ |
return 1; |
return 1; |
} |
} |
|
|
Line 1539 udp4_espinudp(struct mbuf **mp, int off, |
|
Line 1228 udp4_espinudp(struct mbuf **mp, int off, |
|
ip->ip_p = IPPROTO_ESP; |
ip->ip_p = IPPROTO_ESP; |
|
|
/* |
/* |
* Copy the mbuf to avoid multiple free, as both |
* We have modified the packet - it is now ESP, so we should not |
* esp4_input (which we call) and udp_input (which |
* return to UDP processing ... |
* called us) free the mbuf. |
* |
*/ |
|
if ((n = m_dup(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) { |
|
printf("udp4_espinudp: m_dup failed\n"); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember |
* Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember |
* the source UDP port. This is required if we want |
* the source UDP port. This is required if we want |
* to select the right SPD for multiple hosts behind |
* to select the right SPD for multiple hosts behind |
Line 1557 udp4_espinudp(struct mbuf **mp, int off, |
|
Line 1239 udp4_espinudp(struct mbuf **mp, int off, |
|
if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS, |
if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS, |
sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) { |
sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) { |
printf("udp4_espinudp: m_tag_get failed\n"); |
printf("udp4_espinudp: m_tag_get failed\n"); |
m_freem(n); |
m_freem(m); |
return 0; |
return -1; |
} |
} |
((u_int16_t *)(tag + 1))[0] = sport; |
((u_int16_t *)(tag + 1))[0] = sport; |
((u_int16_t *)(tag + 1))[1] = dport; |
((u_int16_t *)(tag + 1))[1] = dport; |
m_tag_prepend(n, tag); |
m_tag_prepend(m, tag); |
|
|
#ifdef FAST_IPSEC |
#ifdef IPSEC |
ipsec4_common_input(n, iphdrlen, IPPROTO_ESP); |
if (ipsec_used) |
|
ipsec4_common_input(m, iphdrlen, IPPROTO_ESP); |
|
/* XXX: else */ |
#else |
#else |
esp4_input(n, iphdrlen); |
esp4_input(m, iphdrlen); |
#endif |
#endif |
|
|
/* We handled it, it shoudln't be handled by UDP */ |
/* We handled it, it shouldn't be handled by UDP */ |
|
*mp = NULL; /* avoid free by caller ... */ |
return 1; |
return 1; |
} |
} |
#endif |
#endif |
|
|
|
PR_WRAP_USRREQS(udp) |
|
#define udp_attach udp_attach_wrapper |
|
#define udp_detach udp_detach_wrapper |
|
#define udp_ioctl udp_ioctl_wrapper |
|
#define udp_usrreq udp_usrreq_wrapper |
|
|
|
const struct pr_usrreqs udp_usrreqs = { |
|
.pr_attach = udp_attach, |
|
.pr_detach = udp_detach, |
|
.pr_ioctl = udp_ioctl, |
|
.pr_generic = udp_usrreq, |
|
}; |