version 1.69, 2000/07/07 15:54:16 |
version 1.213, 2014/08/02 03:55:26 |
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/* |
/* |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* All rights reserved. |
* All rights reserved. |
* |
* |
* Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* modification, are permitted provided that the following conditions |
* are met: |
* are met: |
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* 3. Neither the name of the project nor the names of its contributors |
* 3. Neither the name of the project nor the names of its contributors |
* may be used to endorse or promote products derived from this software |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* without specific prior written permission. |
* |
* |
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* 2. Redistributions in binary form must reproduce the above copyright |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
* 3. Neither the name of the University nor the names of its contributors |
* must display the following acknowledgement: |
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* This product includes software developed by the University of |
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* California, Berkeley and its contributors. |
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* 4. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* without specific prior written permission. |
* |
* |
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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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* UDP protocol implementation. |
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* Per RFC 768, August, 1980. |
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*/ |
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#include <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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#include "opt_inet.h" |
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#include "opt_compat_netbsd.h" |
#include "opt_ipsec.h" |
#include "opt_ipsec.h" |
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#include "opt_inet_csum.h" |
#include "opt_ipkdb.h" |
#include "opt_ipkdb.h" |
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#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> |
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#include <uvm/uvm_extern.h> |
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#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/ip_icmp.h> |
#include <netinet/ip_icmp.h> |
#include <netinet/udp.h> |
#include <netinet/udp.h> |
#include <netinet/udp_var.h> |
#include <netinet/udp_var.h> |
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#include <netinet/udp_private.h> |
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#ifdef INET6 |
#ifdef INET6 |
#include <netinet/ip6.h> |
#include <netinet/ip6.h> |
#include <netinet/icmp6.h> |
#include <netinet/icmp6.h> |
#include <netinet6/ip6_var.h> |
#include <netinet6/ip6_var.h> |
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#include <netinet6/ip6_private.h> |
#include <netinet6/in6_pcb.h> |
#include <netinet6/in6_pcb.h> |
#include <netinet6/udp6_var.h> |
#include <netinet6/udp6_var.h> |
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#include <netinet6/udp6_private.h> |
#endif |
#endif |
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#ifdef PULLDOWN_TEST |
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#ifndef INET6 |
#ifndef INET6 |
/* always need ip6.h for IP6_EXTHDR_GET */ |
/* always need ip6.h for IP6_EXTHDR_GET */ |
#include <netinet/ip6.h> |
#include <netinet/ip6.h> |
#endif |
#endif |
#endif |
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#include <machine/stdarg.h> |
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#ifdef IPSEC |
#ifdef IPSEC |
#include <netinet6/ipsec.h> |
#include <netipsec/ipsec.h> |
#include <netkey/key.h> |
#include <netipsec/ipsec_var.h> |
#endif /*IPSEC*/ |
#include <netipsec/ipsec_private.h> |
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#include <netipsec/esp.h> |
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#ifdef INET6 |
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#include <netipsec/ipsec6.h> |
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#endif |
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#endif /* IPSEC */ |
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#ifdef COMPAT_50 |
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#include <compat/sys/socket.h> |
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#endif |
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#ifdef IPKDB |
#ifdef IPKDB |
#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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#ifndef COMPAT_42 |
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int udpcksum = 1; |
int udpcksum = 1; |
#else |
int udp_do_loopback_cksum = 0; |
int udpcksum = 0; /* XXX */ |
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#endif |
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static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *, |
struct inpcbtable udbtable; |
struct socket *)); |
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static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *, |
percpu_t *udpstat_percpu; |
struct mbuf *, int)); |
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#ifdef INET6 |
#ifdef INET |
static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *, |
#ifdef IPSEC |
struct socket *)); |
static int udp4_espinudp (struct mbuf **, int, struct sockaddr *, |
static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, |
struct socket *); |
struct ifnet *)); |
#endif |
static int udp6_realinput __P((int, struct sockaddr_in6 *, |
static void udp4_sendup (struct mbuf *, int, struct sockaddr *, |
struct sockaddr_in6 *, struct mbuf *, int)); |
struct socket *); |
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static int udp4_realinput (struct sockaddr_in *, struct sockaddr_in *, |
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struct mbuf **, int); |
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static int udp4_input_checksum(struct mbuf *, const struct udphdr *, int, int); |
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#endif |
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#ifdef INET |
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static void udp_notify (struct inpcb *, int); |
#endif |
#endif |
static void udp_notify __P((struct inpcb *, int)); |
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#ifndef UDBHASHSIZE |
#ifndef UDBHASHSIZE |
#define UDBHASHSIZE 128 |
#define UDBHASHSIZE 128 |
#endif |
#endif |
int udbhashsize = UDBHASHSIZE; |
int udbhashsize = UDBHASHSIZE; |
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void |
/* |
udp_init() |
* 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 |
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struct mowner udp_mowner = MOWNER_INIT("udp", ""); |
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struct mowner udp_rx_mowner = MOWNER_INIT("udp", "rx"); |
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struct mowner udp_tx_mowner = MOWNER_INIT("udp", "tx"); |
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#endif |
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#ifdef UDP_CSUM_COUNTERS |
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#include <sys/device.h> |
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#if defined(INET) |
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struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp", "hwcsum bad"); |
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struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp", "hwcsum ok"); |
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struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp", "hwcsum data"); |
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struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp", "swcsum"); |
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EVCNT_ATTACH_STATIC(udp_hwcsum_bad); |
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EVCNT_ATTACH_STATIC(udp_hwcsum_ok); |
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EVCNT_ATTACH_STATIC(udp_hwcsum_data); |
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EVCNT_ATTACH_STATIC(udp_swcsum); |
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#endif /* defined(INET) */ |
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#define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
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#else |
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#define UDP_CSUM_COUNTER_INCR(ev) /* nothing */ |
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#endif /* UDP_CSUM_COUNTERS */ |
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static void sysctl_net_inet_udp_setup(struct sysctllog **); |
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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); |
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MOWNER_ATTACH(&udp_rx_mowner); |
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MOWNER_ATTACH(&udp_mowner); |
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return 0; |
} |
} |
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#ifndef UDP6 |
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void |
void |
#if __STDC__ |
udp_init_common(void) |
udp_input(struct mbuf *m, ...) |
{ |
#else |
static ONCE_DECL(doudpinit); |
udp_input(m, va_alist) |
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struct mbuf *m; |
RUN_ONCE(&doudpinit, do_udpinit); |
va_dcl |
} |
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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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} |
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/* |
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* Checksum extended UDP header and data. |
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*/ |
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int |
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udp_input_checksum(int af, struct mbuf *m, const struct udphdr *uh, |
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int iphlen, int len) |
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{ |
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switch (af) { |
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#ifdef INET |
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case AF_INET: |
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return udp4_input_checksum(m, uh, iphlen, len); |
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#endif |
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#ifdef INET6 |
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case AF_INET6: |
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return udp6_input_checksum(m, uh, iphlen, len); |
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#endif |
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} |
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#ifdef DIAGNOSTIC |
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panic("udp_input_checksum: unknown af %d", af); |
#endif |
#endif |
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/* NOTREACHED */ |
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return -1; |
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} |
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#ifdef INET |
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/* |
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* Checksum extended UDP header and data. |
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*/ |
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static int |
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udp4_input_checksum(struct mbuf *m, const struct udphdr *uh, |
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int iphlen, int len) |
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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 (uh->uh_sum == 0) |
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return 0; |
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switch (m->m_pkthdr.csum_flags & |
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((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) | |
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M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { |
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case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD: |
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UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad); |
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goto badcsum; |
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case M_CSUM_UDPv4|M_CSUM_DATA: { |
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u_int32_t hw_csum = m->m_pkthdr.csum_data; |
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UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data); |
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if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR) { |
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const struct ip *ip = |
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mtod(m, const struct ip *); |
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hw_csum = in_cksum_phdr(ip->ip_src.s_addr, |
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ip->ip_dst.s_addr, |
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htons(hw_csum + len + IPPROTO_UDP)); |
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} |
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if ((hw_csum ^ 0xffff) != 0) |
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goto badcsum; |
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break; |
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} |
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case M_CSUM_UDPv4: |
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/* Checksum was okay. */ |
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UDP_CSUM_COUNTER_INCR(&udp_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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if (__predict_true(!(m->m_pkthdr.rcvif->if_flags & |
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IFF_LOOPBACK) || |
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udp_do_loopback_cksum)) { |
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UDP_CSUM_COUNTER_INCR(&udp_swcsum); |
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if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) |
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goto badcsum; |
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} |
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break; |
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} |
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return 0; |
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badcsum: |
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UDP_STATINC(UDP_STAT_BADSUM); |
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return -1; |
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} |
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void |
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udp_input(struct mbuf *m, ...) |
{ |
{ |
va_list ap; |
va_list ap; |
struct sockaddr_in src, dst; |
struct sockaddr_in src, dst; |
struct ip *ip; |
struct ip *ip; |
struct udphdr *uh; |
struct udphdr *uh; |
int iphlen, proto; |
int iphlen; |
int len; |
int len; |
int n; |
int n; |
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u_int16_t ip_len; |
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va_start(ap, m); |
va_start(ap, m); |
iphlen = va_arg(ap, int); |
iphlen = va_arg(ap, int); |
proto = va_arg(ap, int); |
(void)va_arg(ap, int); /* ignore value, advance ap */ |
va_end(ap); |
va_end(ap); |
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udpstat.udps_ipackets++; |
MCLAIM(m, &udp_rx_mowner); |
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UDP_STATINC(UDP_STAT_IPACKETS); |
#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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} |
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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 |
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* to the userland. |
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*/ |
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#endif |
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/* |
/* |
* Get IP and UDP header together in first mbuf. |
* Get IP and UDP header together in first mbuf. |
*/ |
*/ |
ip = mtod(m, struct ip *); |
ip = mtod(m, struct ip *); |
#ifndef PULLDOWN_TEST |
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if (m->m_len < iphlen + sizeof(struct udphdr)) { |
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if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { |
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udpstat.udps_hdrops++; |
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return; |
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} |
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ip = mtod(m, struct ip *); |
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} |
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uh = (struct udphdr *)((caddr_t)ip + iphlen); |
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#else |
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IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); |
IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); |
if (uh == NULL) { |
if (uh == NULL) { |
udpstat.udps_hdrops++; |
UDP_STATINC(UDP_STAT_HDROPS); |
return; |
return; |
} |
} |
#endif |
KASSERT(UDP_HDR_ALIGNED_P(uh)); |
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/* destination port of 0 is illegal, based on RFC768. */ |
/* destination port of 0 is illegal, based on RFC768. */ |
if (uh->uh_dport == 0) |
if (uh->uh_dport == 0) |
Line 229 udp_input(m, va_alist) |
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Line 364 udp_input(m, va_alist) |
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* 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. |
*/ |
*/ |
|
ip_len = ntohs(ip->ip_len); |
len = ntohs((u_int16_t)uh->uh_ulen); |
len = ntohs((u_int16_t)uh->uh_ulen); |
if (ip->ip_len != iphlen + len) { |
if (ip_len != iphlen + len) { |
if (ip->ip_len < iphlen + len) { |
if (ip_len < iphlen + len || len < sizeof(struct udphdr)) { |
udpstat.udps_badlen++; |
UDP_STATINC(UDP_STAT_BADLEN); |
goto bad; |
goto bad; |
} |
} |
m_adj(m, iphlen + len - ip->ip_len); |
m_adj(m, iphlen + len - ip_len); |
} |
} |
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/* |
/* |
* Checksum extended UDP header and data. |
* Checksum extended UDP header and data. |
*/ |
*/ |
if (uh->uh_sum) { |
if (udp4_input_checksum(m, uh, iphlen, len)) |
if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) { |
goto badcsum; |
udpstat.udps_badsum++; |
|
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. */ |
/* construct source and dst sockaddrs. */ |
bzero(&src, sizeof(src)); |
sockaddr_in_init(&src, &ip->ip_src, uh->uh_sport); |
src.sin_family = AF_INET; |
sockaddr_in_init(&dst, &ip->ip_dst, uh->uh_dport); |
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); |
if ((n = udp4_realinput(&src, &dst, &m, iphlen)) == -1) { |
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UDP_STATINC(UDP_STAT_HDROPS); |
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return; |
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} |
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if (m == NULL) { |
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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; |
|
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bzero(&src6, sizeof(src6)); |
memset(&src6, 0, sizeof(src6)); |
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; |
bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12], |
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; |
bzero(&dst6, 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; |
bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12], |
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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Line 287 udp_input(m, va_alist) |
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Line 421 udp_input(m, va_alist) |
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|
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if (n == 0) { |
if (n == 0) { |
if (m->m_flags & (M_BCAST | M_MCAST)) { |
if (m->m_flags & (M_BCAST | M_MCAST)) { |
udpstat.udps_noportbcast++; |
UDP_STATINC(UDP_STAT_NOPORTBCAST); |
goto bad; |
goto bad; |
} |
} |
udpstat.udps_noport++; |
UDP_STATINC(UDP_STAT_NOPORT); |
#ifdef IPKDB |
#ifdef IPKDB |
if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, |
if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, |
m, iphlen + sizeof(struct udphdr), |
m, iphlen + sizeof(struct udphdr), |
Line 309 udp_input(m, va_alist) |
|
Line 443 udp_input(m, va_alist) |
|
bad: |
bad: |
if (m) |
if (m) |
m_freem(m); |
m_freem(m); |
} |
return; |
|
|
#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: |
badcsum: |
if (m) |
m_freem(m); |
m_freem(m); |
|
return IPPROTO_DONE; |
|
} |
} |
#endif |
#endif |
|
|
|
#ifdef INET |
static void |
static void |
udp4_sendup(m, off, src, so) |
udp4_sendup(struct mbuf *m, int off /* offset of data portion */, |
struct mbuf *m; |
struct sockaddr *src, struct socket *so) |
int off; /* offset of data portion */ |
|
struct sockaddr *src; |
|
struct socket *so; |
|
{ |
{ |
struct mbuf *opts = NULL; |
struct mbuf *opts = NULL; |
struct mbuf *n; |
struct mbuf *n; |
struct inpcb *inp = NULL; |
struct inpcb *inp = NULL; |
#ifdef INET6 |
|
struct in6pcb *in6p = NULL; |
|
#endif |
|
|
|
if (!so) |
if (!so) |
return; |
return; |
Line 442 udp4_sendup(m, off, src, so) |
|
Line 467 udp4_sendup(m, off, src, so) |
|
break; |
break; |
#ifdef INET6 |
#ifdef INET6 |
case AF_INET6: |
case AF_INET6: |
in6p = sotoin6pcb(so); |
|
break; |
break; |
#endif |
#endif |
default: |
default: |
return; |
return; |
} |
} |
|
|
#ifdef 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)) { |
ipsecstat.in_polvio++; |
IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); |
|
if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) |
|
icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT, |
|
0, 0); |
return; |
return; |
} |
} |
#endif /*IPSEC*/ |
#endif /*IPSEC*/ |
|
|
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { |
if (inp && (inp->inp_flags & INP_CONTROLOPTS |
if (inp && (inp->inp_flags & INP_CONTROLOPTS |
|
#ifdef SO_OTIMESTAMP |
|
|| so->so_options & SO_OTIMESTAMP |
|
#endif |
|| so->so_options & SO_TIMESTAMP)) { |
|| so->so_options & SO_TIMESTAMP)) { |
struct ip *ip = mtod(n, struct ip *); |
struct ip *ip = mtod(n, struct ip *); |
ip_savecontrol(inp, &opts, ip, n); |
ip_savecontrol(inp, &opts, ip, n); |
Line 470 udp4_sendup(m, off, src, so) |
|
Line 500 udp4_sendup(m, off, src, so) |
|
m_freem(n); |
m_freem(n); |
if (opts) |
if (opts) |
m_freem(opts); |
m_freem(opts); |
} else |
so->so_rcv.sb_overflowed++; |
sorwakeup(so); |
UDP_STATINC(UDP_STAT_FULLSOCK); |
} |
|
} |
|
|
|
#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 |
} else |
sorwakeup(so); |
sorwakeup(so); |
} |
} |
} |
} |
#endif |
#endif |
|
|
|
#ifdef INET |
static int |
static int |
udp4_realinput(src, dst, m, off) |
udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst, |
struct sockaddr_in *src; |
struct mbuf **mp, int off /* offset of udphdr */) |
struct sockaddr_in *dst; |
|
struct mbuf *m; |
|
int off; /* offset of udphdr */ |
|
{ |
{ |
u_int16_t *sport, *dport; |
u_int16_t *sport, *dport; |
int rcvcnt; |
int rcvcnt; |
struct in_addr *src4, *dst4; |
struct in_addr *src4, *dst4; |
|
struct inpcb_hdr *inph; |
struct inpcb *inp; |
struct inpcb *inp; |
|
struct mbuf *m = *mp; |
|
|
rcvcnt = 0; |
rcvcnt = 0; |
off += sizeof(struct udphdr); /* now, offset of payload */ |
off += sizeof(struct udphdr); /* now, offset of payload */ |
Line 543 udp4_realinput(src, dst, m, off) |
|
Line 531 udp4_realinput(src, dst, m, off) |
|
dst4 = &dst->sin_addr; |
dst4 = &dst->sin_addr; |
dport = &dst->sin_port; |
dport = &dst->sin_port; |
|
|
if (IN_MULTICAST(src4->s_addr) || |
if (IN_MULTICAST(dst4->s_addr) || |
in_broadcast(*dst4, m->m_pkthdr.rcvif)) { |
in_broadcast(*dst4, m->m_pkthdr.rcvif)) { |
struct inpcb *last; |
|
/* |
/* |
* Deliver a multicast or broadcast datagram to *all* sockets |
* Deliver a multicast or broadcast datagram to *all* sockets |
* for which the local and remote addresses and ports match |
* for which the local and remote addresses and ports match |
Line 563 udp4_realinput(src, dst, m, off) |
|
Line 550 udp4_realinput(src, dst, m, off) |
|
*/ |
*/ |
|
|
/* |
/* |
* KAME note: usually we drop udpiphdr from mbuf here. |
* KAME note: traditionally we dropped 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. |
*/ |
*/ |
for (inp = udbtable.inpt_queue.cqh_first; |
TAILQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) { |
inp != (struct inpcb *)&udbtable.inpt_queue; |
inp = (struct inpcb *)inph; |
inp = inp->inp_queue.cqe_next) { |
if (inp->inp_af != AF_INET) |
|
continue; |
|
|
if (inp->inp_lport != *dport) |
if (inp->inp_lport != *dport) |
continue; |
continue; |
if (!in_nullhost(inp->inp_laddr)) { |
if (!in_nullhost(inp->inp_laddr)) { |
Line 584 udp4_realinput(src, dst, m, off) |
|
Line 573 udp4_realinput(src, dst, m, off) |
|
continue; |
continue; |
} |
} |
|
|
last = inp; |
|
udp4_sendup(m, off, (struct sockaddr *)src, |
udp4_sendup(m, off, (struct sockaddr *)src, |
inp->inp_socket); |
inp->inp_socket); |
rcvcnt++; |
rcvcnt++; |
Line 601 udp4_realinput(src, dst, m, off) |
|
Line 589 udp4_realinput(src, dst, m, off) |
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
break; |
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 { |
} else { |
/* |
/* |
* 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) { |
++udpstat.udps_pcbhashmiss; |
UDP_STATINC(UDP_STAT_PCBHASHMISS); |
inp = in_pcblookup_bind(&udbtable, *dst4, *dport); |
inp = in_pcblookup_bind(&udbtable, *dst4, *dport); |
if (inp == 0) { |
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; |
return rcvcnt; |
|
} |
|
|
|
#ifdef IPSEC |
|
/* Handle ESP over UDP */ |
|
if (inp->inp_flags & INP_ESPINUDP_ALL) { |
|
struct sockaddr *sa = (struct sockaddr *)src; |
|
|
|
switch(udp4_espinudp(mp, off, sa, inp->inp_socket)) { |
|
case -1: /* Error, m was freeed */ |
|
rcvcnt = -1; |
|
goto bad; |
|
break; |
|
|
|
case 1: /* ESP over UDP */ |
|
rcvcnt++; |
|
goto bad; |
|
break; |
|
|
|
case 0: /* plain UDP */ |
|
default: /* Unexpected */ |
|
/* |
|
* Normal UDP processing will take place |
|
* m may have changed. |
|
*/ |
|
m = *mp; |
|
break; |
} |
} |
} |
} |
|
#endif |
|
|
|
/* |
|
* Check the minimum TTL for socket. |
|
*/ |
|
if (mtod(m, struct ip *)->ip_ttl < inp->inp_ip_minttl) |
|
goto bad; |
|
|
udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
rcvcnt++; |
rcvcnt++; |
Line 656 udp4_realinput(src, dst, m, off) |
|
Line 643 udp4_realinput(src, dst, m, off) |
|
bad: |
bad: |
return rcvcnt; |
return rcvcnt; |
} |
} |
|
#endif |
|
|
#ifdef INET6 |
#ifdef INET |
static int |
/* |
in6_mcmatch(in6p, ia6, ifp) |
* Notify a udp user of an asynchronous error; |
struct in6pcb *in6p; |
* just wake up so that he can collect error status. |
struct in6_addr *ia6; |
*/ |
struct ifnet *ifp; |
static void |
|
udp_notify(struct inpcb *inp, int errno) |
{ |
{ |
struct ip6_moptions *im6o = in6p->in6p_moptions; |
inp->inp_socket->so_error = errno; |
struct in6_multi_mship *imm; |
sorwakeup(inp->inp_socket); |
|
sowwakeup(inp->inp_socket); |
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 |
void * |
udp6_realinput(af, src, dst, m, off) |
udp_ctlinput(int cmd, const struct sockaddr *sa, void *v) |
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; |
struct ip *ip = v; |
int rcvcnt; |
struct udphdr *uh; |
struct in6_addr *src6, *dst6; |
void (*notify)(struct inpcb *, int) = udp_notify; |
struct in_addr *src4; |
int errno; |
struct in6pcb *in6p; |
|
|
|
rcvcnt = 0; |
if (sa->sa_family != AF_INET |
off += sizeof(struct udphdr); /* now, offset of payload */ |
|| sa->sa_len != sizeof(struct sockaddr_in)) |
|
return NULL; |
|
if ((unsigned)cmd >= PRC_NCMDS) |
|
return NULL; |
|
errno = inetctlerrmap[cmd]; |
|
if (PRC_IS_REDIRECT(cmd)) |
|
notify = in_rtchange, ip = 0; |
|
else if (cmd == PRC_HOSTDEAD) |
|
ip = 0; |
|
else if (errno == 0) |
|
return NULL; |
|
if (ip) { |
|
uh = (struct udphdr *)((char *)ip + (ip->ip_hl << 2)); |
|
in_pcbnotify(&udbtable, satocsin(sa)->sin_addr, uh->uh_dport, |
|
ip->ip_src, uh->uh_sport, errno, notify); |
|
|
if (af != AF_INET && af != AF_INET6) |
/* XXX mapped address case */ |
goto bad; |
} else |
if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6) |
in_pcbnotifyall(&udbtable, satocsin(sa)->sin_addr, errno, |
goto bad; |
notify); |
|
return NULL; |
|
} |
|
|
src6 = &src->sin6_addr; |
int |
sport = &src->sin6_port; |
udp_ctloutput(int op, struct socket *so, struct sockopt *sopt) |
dst6 = &dst->sin6_addr; |
{ |
dport = &dst->sin6_port; |
int s; |
src4 = (struct in_addr *)&src->sin6_addr.s6_addr32[12]; |
int error = 0; |
|
struct inpcb *inp; |
if (IN6_IS_ADDR_MULTICAST(dst6) |
int family; |
|| (af == AF_INET && IN_MULTICAST(src4->s_addr))) { |
int optval; |
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?) |
|
*/ |
|
|
|
/* |
family = so->so_proto->pr_domain->dom_family; |
* KAME note: usually we drop udpiphdr from mbuf here. |
|
* we need udpiphdr for iPsec processing so we do that later. |
s = splsoftnet(); |
*/ |
switch (family) { |
/* |
#ifdef INET |
* Locate pcb(s) for datagram. |
case PF_INET: |
*/ |
if (sopt->sopt_level != IPPROTO_UDP) { |
for (in6p = udb6.in6p_next; in6p != &udb6; |
error = ip_ctloutput(op, so, sopt); |
in6p = in6p->in6p_next) { |
goto end; |
if (in6p->in6p_lport != *dport) |
} |
continue; |
break; |
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 |
#endif |
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { |
#ifdef INET6 |
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6) |
case PF_INET6: |
|| in6p->in6p_fport != *sport) |
if (sopt->sopt_level != IPPROTO_UDP) { |
continue; |
error = ip6_ctloutput(op, so, sopt); |
} |
goto end; |
#ifndef INET6_BINDV6ONLY |
} |
else { |
break; |
if (IN6_IS_ADDR_V4MAPPED(src6) |
|
&& (in6p->in6p_flags & IN6P_BINDV6ONLY)) |
|
continue; |
|
} |
|
#endif |
#endif |
|
default: |
|
error = EAFNOSUPPORT; |
|
goto end; |
|
} |
|
|
last = in6p; |
|
udp6_sendup(m, off, (struct sockaddr *)src, |
|
in6p->in6p_socket); |
|
rcvcnt++; |
|
|
|
/* |
switch (op) { |
* Don't look for additional matches if this one does |
case PRCO_SETOPT: |
* not have either the SO_REUSEPORT or SO_REUSEADDR |
inp = sotoinpcb(so); |
* socket options set. This heuristic avoids searching |
|
* through all pcbs in the common case of a non-shared |
switch (sopt->sopt_name) { |
* port. It assumes that an application will never |
case UDP_ENCAP: |
* clear these options after setting them. |
error = sockopt_getint(sopt, &optval); |
*/ |
if (error) |
if ((in6p->in6p_socket->so_options & |
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
|
break; |
break; |
} |
|
|
|
#if 0 |
switch(optval) { |
if (last == NULL) { |
case 0: |
/* |
inp->inp_flags &= ~INP_ESPINUDP_ALL; |
* 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; |
break; |
case AF_INET6: |
|
udp6stat.udp6s_noportmcast++; |
case UDP_ENCAP_ESPINUDP: |
|
inp->inp_flags &= ~INP_ESPINUDP_ALL; |
|
inp->inp_flags |= INP_ESPINUDP; |
break; |
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; |
case UDP_ENCAP_ESPINUDP_NON_IKE: |
|
inp->inp_flags &= ~INP_ESPINUDP_ALL; |
|
inp->inp_flags |= INP_ESPINUDP_NON_IKE; |
|
break; |
|
default: |
|
error = EINVAL; |
|
break; |
} |
} |
|
break; |
|
|
|
default: |
|
error = ENOPROTOOPT; |
|
break; |
} |
} |
|
break; |
|
|
udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); |
default: |
rcvcnt++; |
error = EINVAL; |
|
break; |
} |
} |
|
|
bad: |
end: |
return rcvcnt; |
splx(s); |
|
return error; |
} |
} |
#endif |
|
|
|
#else /*UDP6*/ |
|
|
|
void |
int |
#if __STDC__ |
udp_output(struct mbuf *m, ...) |
udp_input(struct mbuf *m, ...) |
|
#else |
|
udp_input(m, va_alist) |
|
struct mbuf *m; |
|
va_dcl |
|
#endif |
|
{ |
{ |
int proto; |
|
struct ip *ip; |
|
struct udphdr *uh; |
|
struct inpcb *inp; |
struct inpcb *inp; |
struct mbuf *opts = 0; |
struct udpiphdr *ui; |
int len; |
struct route *ro; |
struct ip save_ip; |
int len = m->m_pkthdr.len; |
int iphlen; |
int error = 0; |
va_list ap; |
va_list ap; |
struct sockaddr_in udpsrc; |
|
struct sockaddr *sa; |
|
|
|
|
MCLAIM(m, &udp_tx_mowner); |
va_start(ap, m); |
va_start(ap, m); |
iphlen = va_arg(ap, int); |
inp = va_arg(ap, struct inpcb *); |
proto = va_arg(ap, int); |
|
va_end(ap); |
va_end(ap); |
|
|
udpstat.udps_ipackets++; |
|
|
|
/* |
/* |
* Strip IP options, if any; should skip this, |
* Calculate data length and get a mbuf |
* make available to user, and use on returned packets, |
* for UDP and IP headers. |
* but we don't yet have a way to check the checksum |
|
* with options still present. |
|
*/ |
*/ |
if (iphlen > sizeof (struct ip)) { |
M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); |
ip_stripoptions(m, (struct mbuf *)0); |
if (m == 0) { |
iphlen = sizeof(struct ip); |
error = ENOBUFS; |
|
goto release; |
} |
} |
|
|
/* |
/* |
* Get IP and UDP header together in first mbuf. |
* Compute the packet length of the IP header, and |
|
* punt if the length looks bogus. |
*/ |
*/ |
ip = mtod(m, struct ip *); |
if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { |
if (m->m_len < iphlen + sizeof(struct udphdr)) { |
error = EMSGSIZE; |
if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { |
goto release; |
udpstat.udps_hdrops++; |
|
return; |
|
} |
|
ip = mtod(m, struct ip *); |
|
} |
} |
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. |
* Fill in mbuf with extended UDP header |
* If not enough data to reflect UDP length, drop. |
* and addresses and length put into network format. |
*/ |
|
len = ntohs((u_int16_t)uh->uh_ulen); |
|
if (ip->ip_len != iphlen + len) { |
|
if (ip->ip_len < iphlen + len) { |
|
udpstat.udps_badlen++; |
|
goto bad; |
|
} |
|
m_adj(m, iphlen + len - ip->ip_len); |
|
} |
|
/* |
|
* Save a copy of the IP header in case we want restore it |
|
* for sending an ICMP error message in response. |
|
*/ |
*/ |
save_ip = *ip; |
ui = mtod(m, struct udpiphdr *); |
|
ui->ui_pr = IPPROTO_UDP; |
|
ui->ui_src = inp->inp_laddr; |
|
ui->ui_dst = inp->inp_faddr; |
|
ui->ui_sport = inp->inp_lport; |
|
ui->ui_dport = inp->inp_fport; |
|
ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr)); |
|
|
/* |
ro = &inp->inp_route; |
* Checksum extended UDP header and data. |
|
*/ |
|
if (uh->uh_sum) { |
|
bzero(((struct ipovly *)ip)->ih_x1, |
|
sizeof ((struct ipovly *)ip)->ih_x1); |
|
((struct ipovly *)ip)->ih_len = uh->uh_ulen; |
|
if (in_cksum(m, len + sizeof (struct ip)) != 0) { |
|
udpstat.udps_badsum++; |
|
m_freem(m); |
|
return; |
|
} |
|
} |
|
|
|
/* |
/* |
* Construct sockaddr format source address. |
* Set up checksum and output datagram. |
*/ |
*/ |
udpsrc.sin_family = AF_INET; |
if (udpcksum) { |
udpsrc.sin_len = sizeof(struct sockaddr_in); |
|
udpsrc.sin_addr = ip->ip_src; |
|
udpsrc.sin_port = uh->uh_sport; |
|
bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero)); |
|
|
|
if (IN_MULTICAST(ip->ip_dst.s_addr) || |
|
in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { |
|
struct inpcb *last; |
|
/* |
/* |
* Deliver a multicast or broadcast datagram to *all* sockets |
* XXX Cache pseudo-header checksum part for |
* for which the local and remote addresses and ports match |
* XXX "connected" UDP sockets. |
* 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?) |
|
*/ |
*/ |
|
ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr, |
|
ui->ui_dst.s_addr, htons((u_int16_t)len + |
|
sizeof(struct udphdr) + IPPROTO_UDP)); |
|
m->m_pkthdr.csum_flags = M_CSUM_UDPv4; |
|
m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); |
|
} else |
|
ui->ui_sum = 0; |
|
((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len); |
|
((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ |
|
((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ |
|
UDP_STATINC(UDP_STAT_OPACKETS); |
|
|
iphlen += sizeof(struct udphdr); |
return (ip_output(m, inp->inp_options, ro, |
/* |
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), |
* KAME note: usually we drop udpiphdr from mbuf here. |
inp->inp_moptions, inp->inp_socket)); |
* we need udpiphdr for iPsec processing so we do that later. |
|
*/ |
|
/* |
|
* Locate pcb(s) for datagram. |
|
* (Algorithm copied from raw_intr().) |
|
*/ |
|
last = NULL; |
|
for (inp = udbtable.inpt_queue.cqh_first; |
|
inp != (struct inpcb *)&udbtable.inpt_queue; |
|
inp = inp->inp_queue.cqe_next) { |
|
if (inp->inp_lport != uh->uh_dport) |
|
continue; |
|
if (!in_nullhost(inp->inp_laddr)) { |
|
if (!in_hosteq(inp->inp_laddr, ip->ip_dst)) |
|
continue; |
|
} |
|
if (!in_nullhost(inp->inp_faddr)) { |
|
if (!in_hosteq(inp->inp_faddr, ip->ip_src) || |
|
inp->inp_fport != uh->uh_sport) |
|
continue; |
|
} |
|
|
|
if (last != NULL) { |
release: |
struct mbuf *n; |
m_freem(m); |
|
return (error); |
|
} |
|
|
#ifdef IPSEC |
static int |
/* check AH/ESP integrity. */ |
udp_attach(struct socket *so, int proto) |
if (last != NULL && ipsec4_in_reject(m, last)) { |
{ |
ipsecstat.in_polvio++; |
struct inpcb *inp; |
/* do not inject data to pcb */ |
int error; |
} else |
|
#endif /*IPSEC*/ |
|
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
|
if (last->inp_flags & INP_CONTROLOPTS |
|
|| last->inp_socket->so_options & |
|
SO_TIMESTAMP) { |
|
ip_savecontrol(last, &opts, |
|
ip, n); |
|
} |
|
m_adj(n, iphlen); |
|
sa = (struct sockaddr *)&udpsrc; |
|
if (sbappendaddr( |
|
&last->inp_socket->so_rcv, |
|
sa, n, opts) == 0) { |
|
m_freem(n); |
|
if (opts) |
|
m_freem(opts); |
|
} else |
|
sorwakeup(last->inp_socket); |
|
opts = 0; |
|
} |
|
} |
|
last = inp; |
|
/* |
|
* 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 ((last->inp_socket->so_options & |
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
|
break; |
|
} |
|
|
|
if (last == NULL) { |
KASSERT(sotoinpcb(so) == NULL); |
/* |
|
* No matching pcb found; discard datagram. |
/* Assign the lock (must happen even if we will error out). */ |
* (No need to send an ICMP Port Unreachable |
sosetlock(so); |
* for a broadcast or multicast datgram.) |
|
*/ |
#ifdef MBUFTRACE |
udpstat.udps_noportbcast++; |
so->so_mowner = &udp_mowner; |
goto bad; |
so->so_rcv.sb_mowner = &udp_rx_mowner; |
} |
so->so_snd.sb_mowner = &udp_tx_mowner; |
#ifdef IPSEC |
|
/* check AH/ESP integrity. */ |
|
if (last != NULL && ipsec4_in_reject(m, last)) { |
|
ipsecstat.in_polvio++; |
|
goto bad; |
|
} |
|
#endif /*IPSEC*/ |
|
if (last->inp_flags & INP_CONTROLOPTS || |
|
last->inp_socket->so_options & SO_TIMESTAMP) |
|
ip_savecontrol(last, &opts, ip, m); |
|
m->m_len -= iphlen; |
|
m->m_pkthdr.len -= iphlen; |
|
m->m_data += iphlen; |
|
sa = (struct sockaddr *)&udpsrc; |
|
if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) { |
|
udpstat.udps_fullsock++; |
|
goto bad; |
|
} |
|
sorwakeup(last->inp_socket); |
|
return; |
|
} |
|
/* |
|
* Locate pcb for datagram. |
|
*/ |
|
inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport, |
|
ip->ip_dst, uh->uh_dport); |
|
if (inp == 0) { |
|
++udpstat.udps_pcbhashmiss; |
|
inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); |
|
if (inp == 0) { |
|
if (m->m_flags & (M_BCAST | M_MCAST)) { |
|
udpstat.udps_noportbcast++; |
|
goto bad; |
|
} |
|
udpstat.udps_noport++; |
|
*ip = save_ip; |
|
#ifdef IPKDB |
|
if (checkipkdb(&ip->ip_src, |
|
uh->uh_sport, |
|
uh->uh_dport, |
|
m, |
|
iphlen + sizeof(struct udphdr), |
|
len - sizeof(struct udphdr))) |
|
/* It was a debugger connect packet, just drop it now */ |
|
goto bad; |
|
#endif |
#endif |
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); |
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { |
return; |
error = soreserve(so, udp_sendspace, udp_recvspace); |
|
if (error) { |
|
return error; |
} |
} |
} |
} |
#ifdef IPSEC |
|
if (inp != NULL && ipsec4_in_reject(m, inp)) { |
error = in_pcballoc(so, &udbtable); |
ipsecstat.in_polvio++; |
if (error) { |
goto bad; |
return error; |
} |
} |
#endif /*IPSEC*/ |
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_accept(struct socket *so, struct mbuf *nam) |
|
{ |
|
KASSERT(solocked(so)); |
|
|
|
panic("udp_accept"); |
|
|
|
return EOPNOTSUPP; |
|
} |
|
|
|
static int |
|
udp_bind(struct socket *so, struct mbuf *nam) |
|
{ |
|
struct inpcb *inp = sotoinpcb(so); |
|
int error = 0; |
|
int s; |
|
|
|
KASSERT(solocked(so)); |
|
KASSERT(inp != NULL); |
|
KASSERT(nam != NULL); |
|
|
|
s = splsoftnet(); |
|
error = in_pcbbind(inp, nam); |
|
splx(s); |
|
|
|
return error; |
|
} |
|
|
|
static int |
|
udp_listen(struct socket *so) |
|
{ |
|
KASSERT(solocked(so)); |
|
|
|
return EOPNOTSUPP; |
|
} |
|
|
|
static int |
|
udp_connect(struct socket *so, struct mbuf *nam) |
|
{ |
|
struct inpcb *inp = sotoinpcb(so); |
|
int error = 0; |
|
int s; |
|
|
|
KASSERT(solocked(so)); |
|
KASSERT(inp != NULL); |
|
KASSERT(nam != NULL); |
|
|
|
s = splsoftnet(); |
|
error = in_pcbconnect(inp, nam, curlwp); |
|
if (! error) |
|
soisconnected(so); |
|
splx(s); |
|
return error; |
|
} |
|
|
|
static int |
|
udp_disconnect(struct socket *so) |
|
{ |
|
struct inpcb *inp = sotoinpcb(so); |
|
int s; |
|
|
|
KASSERT(solocked(so)); |
|
KASSERT(inp != NULL); |
|
|
|
s = splsoftnet(); |
|
/*soisdisconnected(so);*/ |
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */ |
|
in_pcbdisconnect(inp); |
|
inp->inp_laddr = zeroin_addr; /* XXX */ |
|
in_pcbstate(inp, INP_BOUND); /* XXX */ |
|
splx(s); |
|
|
|
return 0; |
|
} |
|
|
/* |
static int |
* Stuff source address and datagram in user buffer. |
udp_shutdown(struct socket *so) |
*/ |
{ |
if (inp->inp_flags & INP_CONTROLOPTS || |
int s; |
inp->inp_socket->so_options & SO_TIMESTAMP) |
|
ip_savecontrol(inp, &opts, ip, m); |
KASSERT(solocked(so)); |
iphlen += sizeof(struct udphdr); |
|
m->m_len -= iphlen; |
s = splsoftnet(); |
m->m_pkthdr.len -= iphlen; |
socantsendmore(so); |
m->m_data += iphlen; |
splx(s); |
sa = (struct sockaddr *)&udpsrc; |
|
if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) { |
return 0; |
udpstat.udps_fullsock++; |
|
goto bad; |
|
} |
|
sorwakeup(inp->inp_socket); |
|
return; |
|
bad: |
|
m_freem(m); |
|
if (opts) |
|
m_freem(opts); |
|
} |
} |
#endif /*UDP6*/ |
|
|
|
/* |
static int |
* Notify a udp user of an asynchronous error; |
udp_abort(struct socket *so) |
* just wake up so that he can collect error status. |
|
*/ |
|
static void |
|
udp_notify(inp, errno) |
|
struct inpcb *inp; |
|
int errno; |
|
{ |
{ |
|
KASSERT(solocked(so)); |
|
|
inp->inp_socket->so_error = errno; |
panic("udp_abort"); |
sorwakeup(inp->inp_socket); |
|
sowwakeup(inp->inp_socket); |
return EOPNOTSUPP; |
} |
} |
|
|
void * |
static int |
udp_ctlinput(cmd, sa, v) |
udp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) |
int cmd; |
|
struct sockaddr *sa; |
|
void *v; |
|
{ |
{ |
struct ip *ip = v; |
return in_control(so, cmd, nam, ifp); |
struct udphdr *uh; |
} |
void (*notify) __P((struct inpcb *, int)) = udp_notify; |
|
int errno; |
|
|
|
if (sa->sa_family != AF_INET |
static int |
|| sa->sa_len != sizeof(struct sockaddr_in)) |
udp_stat(struct socket *so, struct stat *ub) |
return NULL; |
{ |
if ((unsigned)cmd >= PRC_NCMDS) |
KASSERT(solocked(so)); |
return NULL; |
|
errno = inetctlerrmap[cmd]; |
|
if (PRC_IS_REDIRECT(cmd)) |
|
notify = in_rtchange, ip = 0; |
|
else if (cmd == PRC_HOSTDEAD) |
|
ip = 0; |
|
else if (errno == 0) |
|
return NULL; |
|
if (ip) { |
|
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); |
|
in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, |
|
ip->ip_src, uh->uh_sport, errno, notify); |
|
|
|
/* XXX mapped address case */ |
/* stat: don't bother with a blocksize. */ |
} else |
return 0; |
in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, |
|
notify); |
|
return NULL; |
|
} |
} |
|
|
int |
static int |
#if __STDC__ |
udp_peeraddr(struct socket *so, struct mbuf *nam) |
udp_output(struct mbuf *m, ...) |
|
#else |
|
udp_output(m, va_alist) |
|
struct mbuf *m; |
|
va_dcl |
|
#endif |
|
{ |
{ |
struct inpcb *inp; |
int s; |
struct udpiphdr *ui; |
|
int len = m->m_pkthdr.len; |
|
int error = 0; |
|
va_list ap; |
|
|
|
va_start(ap, m); |
KASSERT(solocked(so)); |
inp = va_arg(ap, struct inpcb *); |
KASSERT(sotoinpcb(so) != NULL); |
va_end(ap); |
KASSERT(nam != NULL); |
|
|
/* |
s = splsoftnet(); |
* Calculate data length and get a mbuf |
in_setpeeraddr(sotoinpcb(so), nam); |
* for UDP and IP headers. |
splx(s); |
*/ |
|
M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); |
|
if (m == 0) { |
|
error = ENOBUFS; |
|
goto release; |
|
} |
|
|
|
/* |
return 0; |
* Compute the packet length of the IP header, and |
} |
* punt if the length looks bogus. |
|
*/ |
|
if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) { |
|
error = EMSGSIZE; |
|
goto release; |
|
} |
|
|
|
/* |
static int |
* Fill in mbuf with extended UDP header |
udp_sockaddr(struct socket *so, struct mbuf *nam) |
* and addresses and length put into network format. |
{ |
*/ |
int s; |
ui = mtod(m, struct udpiphdr *); |
|
bzero(ui->ui_x1, sizeof ui->ui_x1); |
|
ui->ui_pr = IPPROTO_UDP; |
|
ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr)); |
|
ui->ui_src = inp->inp_laddr; |
|
ui->ui_dst = inp->inp_faddr; |
|
ui->ui_sport = inp->inp_lport; |
|
ui->ui_dport = inp->inp_fport; |
|
ui->ui_ulen = ui->ui_len; |
|
|
|
/* |
KASSERT(solocked(so)); |
* Stuff checksum and output datagram. |
KASSERT(sotoinpcb(so) != NULL); |
*/ |
KASSERT(nam != NULL); |
ui->ui_sum = 0; |
|
if (udpcksum) { |
|
if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) |
|
ui->ui_sum = 0xffff; |
|
} |
|
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; |
|
((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ |
|
((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ |
|
udpstat.udps_opackets++; |
|
|
|
#ifdef IPSEC |
s = splsoftnet(); |
ipsec_setsocket(m, inp->inp_socket); |
in_setsockaddr(sotoinpcb(so), nam); |
#endif /*IPSEC*/ |
splx(s); |
|
|
return (ip_output(m, inp->inp_options, &inp->inp_route, |
return 0; |
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), |
} |
inp->inp_moptions)); |
|
|
|
release: |
static int |
m_freem(m); |
udp_recvoob(struct socket *so, struct mbuf *m, int flags) |
return (error); |
{ |
|
KASSERT(solocked(so)); |
|
|
|
return EOPNOTSUPP; |
} |
} |
|
|
int udp_sendspace = 9216; /* really max datagram size */ |
static int |
int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); |
udp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) |
/* 40 1K datagrams */ |
{ |
|
KASSERT(solocked(so)); |
|
|
|
m_freem(m); |
|
m_freem(control); |
|
|
/*ARGSUSED*/ |
return EOPNOTSUPP; |
int |
} |
udp_usrreq(so, req, m, nam, control, p) |
|
struct socket *so; |
static int |
int req; |
udp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, |
struct mbuf *m, *nam, *control; |
struct mbuf *control, struct lwp *l) |
struct proc *p; |
|
{ |
{ |
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, (caddr_t)nam, |
KASSERT(req != PRU_DETACH); |
(struct ifnet *)control, p)); |
KASSERT(req != PRU_ACCEPT); |
|
KASSERT(req != PRU_BIND); |
|
KASSERT(req != PRU_LISTEN); |
|
KASSERT(req != PRU_CONNECT); |
|
KASSERT(req != PRU_DISCONNECT); |
|
KASSERT(req != PRU_SHUTDOWN); |
|
KASSERT(req != PRU_ABORT); |
|
KASSERT(req != PRU_CONTROL); |
|
KASSERT(req != PRU_SENSE); |
|
KASSERT(req != PRU_PEERADDR); |
|
KASSERT(req != PRU_SOCKADDR); |
|
KASSERT(req != PRU_RCVOOB); |
|
KASSERT(req != PRU_SENDOOB); |
|
|
|
s = splsoftnet(); |
if (req == PRU_PURGEIF) { |
if (req == PRU_PURGEIF) { |
|
mutex_enter(softnet_lock); |
|
in_pcbpurgeif0(&udbtable, (struct ifnet *)control); |
in_purgeif((struct ifnet *)control); |
in_purgeif((struct ifnet *)control); |
in_pcbpurgeif(&udbtable, (struct ifnet *)control); |
in_pcbpurgeif(&udbtable, (struct ifnet *)control); |
return (0); |
mutex_exit(softnet_lock); |
|
splx(s); |
|
return 0; |
} |
} |
|
|
s = splsoftnet(); |
KASSERT(solocked(so)); |
inp = sotoinpcb(so); |
inp = sotoinpcb(so); |
#ifdef DIAGNOSTIC |
|
if (req != PRU_SEND && req != PRU_SENDOOB && control) |
KASSERT(!control || req == PRU_SEND); |
panic("udp_usrreq: unexpected control mbuf"); |
if (inp == NULL) { |
#endif |
splx(s); |
if (inp == 0 && req != PRU_ATTACH) { |
return EINVAL; |
error = EINVAL; |
|
goto release; |
|
} |
} |
|
|
/* |
/* |
Line 1297 udp_usrreq(so, req, m, nam, control, p) |
|
Line 1107 udp_usrreq(so, req, m, nam, control, p) |
|
* 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; |
|
} |
|
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; |
|
#ifdef IPSEC |
|
error = ipsec_init_policy(so, &inp->inp_sp); |
|
if (error != 0) { |
|
in_pcbdetach(inp); |
|
break; |
|
} |
|
#endif /*IPSEC*/ |
|
break; |
|
|
|
case PRU_DETACH: |
|
in_pcbdetach(inp); |
|
break; |
|
|
|
case PRU_BIND: |
|
error = in_pcbbind(inp, nam, p); |
|
break; |
|
|
|
case PRU_LISTEN: |
|
error = EOPNOTSUPP; |
|
break; |
|
|
|
case PRU_CONNECT: |
|
error = in_pcbconnect(inp, nam); |
|
if (error) |
|
break; |
|
soisconnected(so); |
|
break; |
|
|
|
case PRU_CONNECT2: |
case PRU_CONNECT2: |
error = EOPNOTSUPP; |
error = EOPNOTSUPP; |
break; |
break; |
|
|
case PRU_DISCONNECT: |
|
/*soisdisconnected(so);*/ |
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */ |
|
in_pcbdisconnect(inp); |
|
inp->inp_laddr = zeroin_addr; /* XXX */ |
|
in_pcbstate(inp, INP_BOUND); /* XXX */ |
|
break; |
|
|
|
case PRU_SHUTDOWN: |
|
socantsendmore(so); |
|
break; |
|
|
|
case PRU_RCVD: |
case PRU_RCVD: |
error = EOPNOTSUPP; |
error = EOPNOTSUPP; |
break; |
break; |
Line 1371 udp_usrreq(so, req, m, nam, control, p) |
|
Line 1125 udp_usrreq(so, req, m, nam, control, p) |
|
{ |
{ |
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) { |
error = EISCONN; |
error = EISCONN; |
goto die; |
goto die; |
} |
} |
error = in_pcbconnect(inp, nam); |
error = in_pcbconnect(inp, nam, l); |
if (error) { |
if (error) |
die: |
goto die; |
m_freem(m); |
|
break; |
|
} |
|
} else { |
} else { |
if ((so->so_state & SS_ISCONNECTED) == 0) { |
if ((so->so_state & SS_ISCONNECTED) == 0) { |
error = ENOTCONN; |
error = ENOTCONN; |
Line 1390 udp_usrreq(so, req, m, nam, control, p) |
|
Line 1142 udp_usrreq(so, req, m, nam, control, p) |
|
} |
} |
} |
} |
error = udp_output(m, inp); |
error = udp_output(m, inp); |
|
m = NULL; |
if (nam) { |
if (nam) { |
in_pcbdisconnect(inp); |
in_pcbdisconnect(inp); |
inp->inp_laddr = laddr; /* XXX */ |
inp->inp_laddr = laddr; /* XXX */ |
in_pcbstate(inp, INP_BOUND); /* XXX */ |
in_pcbstate(inp, INP_BOUND); /* XXX */ |
} |
} |
|
die: |
|
if (m) |
|
m_freem(m); |
} |
} |
break; |
break; |
|
|
case PRU_SENSE: |
default: |
/* |
panic("udp_usrreq"); |
* stat: don't bother with a blocksize. |
} |
*/ |
splx(s); |
splx(s); |
|
return (0); |
|
|
|
case PRU_RCVOOB: |
return error; |
error = EOPNOTSUPP; |
} |
break; |
|
|
|
case PRU_SENDOOB: |
static int |
m_freem(control); |
sysctl_net_inet_udp_stats(SYSCTLFN_ARGS) |
m_freem(m); |
{ |
error = EOPNOTSUPP; |
|
break; |
|
|
|
case PRU_SOCKADDR: |
return (NETSTAT_SYSCTL(udpstat_percpu, UDP_NSTATS)); |
in_setsockaddr(inp, nam); |
} |
break; |
|
|
|
case PRU_PEERADDR: |
/* |
in_setpeeraddr(inp, nam); |
* Sysctl for udp variables. |
break; |
*/ |
|
static void |
|
sysctl_net_inet_udp_setup(struct sysctllog **clog) |
|
{ |
|
|
default: |
sysctl_createv(clog, 0, NULL, NULL, |
panic("udp_usrreq"); |
CTLFLAG_PERMANENT, |
} |
CTLTYPE_NODE, "inet", NULL, |
|
NULL, 0, NULL, 0, |
|
CTL_NET, PF_INET, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_NODE, "udp", |
|
SYSCTL_DESCR("UDPv4 related settings"), |
|
NULL, 0, NULL, 0, |
|
CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL); |
|
|
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "checksum", |
|
SYSCTL_DESCR("Compute UDP checksums"), |
|
NULL, 0, &udpcksum, 0, |
|
CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM, |
|
CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "sendspace", |
|
SYSCTL_DESCR("Default UDP send buffer size"), |
|
NULL, 0, &udp_sendspace, 0, |
|
CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE, |
|
CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "recvspace", |
|
SYSCTL_DESCR("Default UDP receive buffer size"), |
|
NULL, 0, &udp_recvspace, 0, |
|
CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE, |
|
CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "do_loopback_cksum", |
|
SYSCTL_DESCR("Perform UDP checksum on loopback"), |
|
NULL, 0, &udp_do_loopback_cksum, 0, |
|
CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_LOOPBACKCKSUM, |
|
CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_STRUCT, "pcblist", |
|
SYSCTL_DESCR("UDP protocol control block list"), |
|
sysctl_inpcblist, 0, &udbtable, 0, |
|
CTL_NET, PF_INET, IPPROTO_UDP, CTL_CREATE, |
|
CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT, |
|
CTLTYPE_STRUCT, "stats", |
|
SYSCTL_DESCR("UDP statistics"), |
|
sysctl_net_inet_udp_stats, 0, NULL, 0, |
|
CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_STATS, |
|
CTL_EOL); |
|
} |
|
#endif |
|
|
release: |
void |
splx(s); |
udp_statinc(u_int stat) |
return (error); |
{ |
|
|
|
KASSERT(stat < UDP_NSTATS); |
|
UDP_STATINC(stat); |
} |
} |
|
|
|
#if defined(INET) && defined(IPSEC) |
/* |
/* |
* Sysctl for udp variables. |
* Returns: |
|
* 1 if the packet was processed |
|
* 0 if normal UDP processing should take place |
|
* -1 if an error occurent and m was freed |
*/ |
*/ |
int |
static int |
udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen) |
udp4_espinudp(struct mbuf **mp, int off, struct sockaddr *src, |
int *name; |
struct socket *so) |
u_int namelen; |
{ |
void *oldp; |
size_t len; |
size_t *oldlenp; |
void *data; |
void *newp; |
struct inpcb *inp; |
size_t newlen; |
size_t skip = 0; |
{ |
size_t minlen; |
/* All sysctl names at this level are terminal. */ |
size_t iphdrlen; |
if (namelen != 1) |
struct ip *ip; |
return (ENOTDIR); |
struct m_tag *tag; |
|
struct udphdr *udphdr; |
switch (name[0]) { |
u_int16_t sport, dport; |
case UDPCTL_CHECKSUM: |
struct mbuf *m = *mp; |
return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum)); |
|
case UDPCTL_SENDSPACE: |
/* |
return (sysctl_int(oldp, oldlenp, newp, newlen, |
* Collapse the mbuf chain if the first mbuf is too short |
&udp_sendspace)); |
* The longest case is: UDP + non ESP marker + ESP |
case UDPCTL_RECVSPACE: |
*/ |
return (sysctl_int(oldp, oldlenp, newp, newlen, |
minlen = off + sizeof(u_int64_t) + sizeof(struct esp); |
&udp_recvspace)); |
if (minlen > m->m_pkthdr.len) |
default: |
minlen = m->m_pkthdr.len; |
return (ENOPROTOOPT); |
|
|
if (m->m_len < minlen) { |
|
if ((*mp = m_pullup(m, minlen)) == NULL) { |
|
printf("udp4_espinudp: m_pullup failed\n"); |
|
return -1; |
|
} |
|
m = *mp; |
} |
} |
/* NOTREACHED */ |
|
|
len = m->m_len - off; |
|
data = mtod(m, char *) + off; |
|
inp = sotoinpcb(so); |
|
|
|
/* Ignore keepalive packets */ |
|
if ((len == 1) && (*(unsigned char *)data == 0xff)) { |
|
m_free(m); |
|
*mp = NULL; /* avoid any further processiong by caller ... */ |
|
return 1; |
|
} |
|
|
|
/* |
|
* Check that the payload is long enough to hold |
|
* an ESP header and compute the length of encapsulation |
|
* header to remove |
|
*/ |
|
if (inp->inp_flags & INP_ESPINUDP) { |
|
u_int32_t *st = (u_int32_t *)data; |
|
|
|
if ((len <= sizeof(struct esp)) || (*st == 0)) |
|
return 0; /* Normal UDP processing */ |
|
|
|
skip = sizeof(struct udphdr); |
|
} |
|
|
|
if (inp->inp_flags & INP_ESPINUDP_NON_IKE) { |
|
u_int32_t *st = (u_int32_t *)data; |
|
|
|
if ((len <= sizeof(u_int64_t) + sizeof(struct esp)) |
|
|| ((st[0] | st[1]) != 0)) |
|
return 0; /* Normal UDP processing */ |
|
|
|
skip = sizeof(struct udphdr) + sizeof(u_int64_t); |
|
} |
|
|
|
/* |
|
* Get the UDP ports. They are handled in network |
|
* order everywhere in IPSEC_NAT_T code. |
|
*/ |
|
udphdr = (struct udphdr *)((char *)data - skip); |
|
sport = udphdr->uh_sport; |
|
dport = udphdr->uh_dport; |
|
|
|
/* |
|
* Remove the UDP header (and possibly the non ESP marker) |
|
* IP header lendth is iphdrlen |
|
* Before: |
|
* <--- off ---> |
|
* +----+------+-----+ |
|
* | IP | UDP | ESP | |
|
* +----+------+-----+ |
|
* <-skip-> |
|
* After: |
|
* +----+-----+ |
|
* | IP | ESP | |
|
* +----+-----+ |
|
* <-skip-> |
|
*/ |
|
iphdrlen = off - sizeof(struct udphdr); |
|
memmove(mtod(m, char *) + skip, mtod(m, void *), iphdrlen); |
|
m_adj(m, skip); |
|
|
|
ip = mtod(m, struct ip *); |
|
ip->ip_len = htons(ntohs(ip->ip_len) - skip); |
|
ip->ip_p = IPPROTO_ESP; |
|
|
|
/* |
|
* We have modified the packet - it is now ESP, so we should not |
|
* return to UDP processing ... |
|
* |
|
* Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember |
|
* the source UDP port. This is required if we want |
|
* to select the right SPD for multiple hosts behind |
|
* same NAT |
|
*/ |
|
if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS, |
|
sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) { |
|
printf("udp4_espinudp: m_tag_get failed\n"); |
|
m_freem(m); |
|
return -1; |
|
} |
|
((u_int16_t *)(tag + 1))[0] = sport; |
|
((u_int16_t *)(tag + 1))[1] = dport; |
|
m_tag_prepend(m, tag); |
|
|
|
#ifdef IPSEC |
|
if (ipsec_used) |
|
ipsec4_common_input(m, iphdrlen, IPPROTO_ESP); |
|
/* XXX: else */ |
|
#else |
|
esp4_input(m, iphdrlen); |
|
#endif |
|
|
|
/* We handled it, it shouldn't be handled by UDP */ |
|
*mp = NULL; /* avoid free by caller ... */ |
|
return 1; |
} |
} |
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#endif |
|
|
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PR_WRAP_USRREQS(udp) |
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#define udp_attach udp_attach_wrapper |
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#define udp_detach udp_detach_wrapper |
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#define udp_accept udp_accept_wrapper |
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#define udp_bind udp_bind_wrapper |
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#define udp_listen udp_listen_wrapper |
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#define udp_connect udp_connect_wrapper |
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#define udp_disconnect udp_disconnect_wrapper |
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#define udp_shutdown udp_shutdown_wrapper |
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#define udp_abort udp_abort_wrapper |
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#define udp_ioctl udp_ioctl_wrapper |
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#define udp_stat udp_stat_wrapper |
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#define udp_peeraddr udp_peeraddr_wrapper |
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#define udp_sockaddr udp_sockaddr_wrapper |
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#define udp_recvoob udp_recvoob_wrapper |
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#define udp_sendoob udp_sendoob_wrapper |
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#define udp_usrreq udp_usrreq_wrapper |
|
|
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const struct pr_usrreqs udp_usrreqs = { |
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.pr_attach = udp_attach, |
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.pr_detach = udp_detach, |
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.pr_accept = udp_accept, |
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.pr_bind = udp_bind, |
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.pr_listen = udp_listen, |
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.pr_connect = udp_connect, |
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.pr_disconnect = udp_disconnect, |
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.pr_shutdown = udp_shutdown, |
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.pr_abort = udp_abort, |
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.pr_ioctl = udp_ioctl, |
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.pr_stat = udp_stat, |
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.pr_peeraddr = udp_peeraddr, |
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.pr_sockaddr = udp_sockaddr, |
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.pr_recvoob = udp_recvoob, |
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.pr_sendoob = udp_sendoob, |
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.pr_generic = udp_usrreq, |
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}; |