version 1.1, 1993/03/21 09:45:37 |
version 1.160.8.2, 2008/01/09 01:57:31 |
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/* $NetBSD$ */ |
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/* |
/* |
* Copyright (c) 1982, 1986, 1988, 1990 Regents of the University of California. |
* 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 |
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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 project nor the names of its contributors |
* must display the following acknowledgement: |
* may be used to endorse or promote products derived from this software |
* This product includes software developed by the University of |
* without specific prior written permission. |
* California, Berkeley and its contributors. |
* |
* 4. Neither the name of the University nor the names of its contributors |
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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/* |
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* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
|
* notice, this list of conditions and the following disclaimer in the |
|
* documentation and/or other materials provided with the distribution. |
|
* 3. Neither the name of the University 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. |
* |
* |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* SUCH DAMAGE. |
* SUCH DAMAGE. |
* |
* |
* @(#)udp_usrreq.c 7.20 (Berkeley) 4/20/91 |
* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 |
*/ |
*/ |
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#include "param.h" |
#include <sys/cdefs.h> |
#include "malloc.h" |
__KERNEL_RCSID(0, "$NetBSD$"); |
#include "mbuf.h" |
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#include "protosw.h" |
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#include "socket.h" |
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#include "socketvar.h" |
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#include "stat.h" |
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#include "../net/if.h" |
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#include "../net/route.h" |
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#include "in.h" |
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#include "in_systm.h" |
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#include "ip.h" |
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#include "in_pcb.h" |
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#include "ip_var.h" |
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#include "ip_icmp.h" |
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#include "udp.h" |
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#include "udp_var.h" |
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struct inpcb *udp_last_inpcb = &udb; |
#include "opt_inet.h" |
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#include "opt_ipsec.h" |
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#include "opt_inet_csum.h" |
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#include "opt_ipkdb.h" |
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#include "opt_mbuftrace.h" |
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#include <sys/param.h> |
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#include <sys/malloc.h> |
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#include <sys/mbuf.h> |
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#include <sys/protosw.h> |
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#include <sys/socket.h> |
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#include <sys/socketvar.h> |
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#include <sys/errno.h> |
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#include <sys/stat.h> |
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#include <sys/systm.h> |
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#include <sys/proc.h> |
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#include <sys/domain.h> |
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#include <sys/sysctl.h> |
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#include <net/if.h> |
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#include <net/route.h> |
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#include <netinet/in.h> |
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#include <netinet/in_systm.h> |
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#include <netinet/in_var.h> |
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#include <netinet/ip.h> |
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#include <netinet/in_pcb.h> |
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#include <netinet/ip_var.h> |
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#include <netinet/ip_icmp.h> |
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#include <netinet/udp.h> |
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#include <netinet/udp_var.h> |
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#ifdef INET6 |
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#include <netinet/ip6.h> |
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#include <netinet/icmp6.h> |
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#include <netinet6/ip6_var.h> |
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#include <netinet6/in6_pcb.h> |
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#include <netinet6/udp6_var.h> |
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#include <netinet6/scope6_var.h> |
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#endif |
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#ifndef INET6 |
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/* always need ip6.h for IP6_EXTHDR_GET */ |
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#include <netinet/ip6.h> |
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#endif |
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#include "faith.h" |
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#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> |
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#include <netipsec/ipsec_var.h> /* XXX ipsecstat namespace */ |
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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 /* FAST_IPSEC*/ |
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#ifdef IPSEC |
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#include <netinet6/ipsec.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 IPKDB |
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#include <ipkdb/ipkdb.h> |
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#endif |
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/* |
/* |
* UDP protocol implementation. |
* UDP protocol implementation. |
* Per RFC 768, August, 1980. |
* Per RFC 768, August, 1980. |
*/ |
*/ |
udp_init() |
int udpcksum = 1; |
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int udp_do_loopback_cksum = 0; |
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struct inpcbtable udbtable; |
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struct udpstat udpstat; |
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#ifdef INET |
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#ifdef IPSEC_NAT_T |
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static int udp4_espinudp (struct mbuf **, int, struct sockaddr *, |
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struct socket *); |
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#endif |
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static void udp4_sendup (struct mbuf *, int, struct sockaddr *, |
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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 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 |
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static void udp_notify (struct inpcb *, int); |
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#endif |
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#ifndef UDBHASHSIZE |
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#define UDBHASHSIZE 128 |
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#endif |
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int udbhashsize = UDBHASHSIZE; |
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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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#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++ |
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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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void |
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udp_init(void) |
{ |
{ |
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udb.inp_next = udb.inp_prev = &udb; |
in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
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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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#ifndef COMPAT_42 |
/* |
int udpcksum = 1; |
* Checksum extended UDP header and data. |
#else |
*/ |
int udpcksum = 0; /* XXX */ |
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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 |
int udp_ttl = UDP_TTL; |
/* NOTREACHED */ |
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return -1; |
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} |
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struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET }; |
#ifdef INET |
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udp_input(m, iphlen) |
/* |
register struct mbuf *m; |
* Checksum extended UDP header and data. |
int iphlen; |
*/ |
{ |
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register struct ip *ip; |
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register struct udphdr *uh; |
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register struct inpcb *inp; |
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struct mbuf *opts = 0; |
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int len; |
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struct ip save_ip; |
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udpstat.udps_ipackets++; |
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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/* |
/* |
* Strip IP options, if any; should skip this, |
* XXX it's better to record and check if this mbuf is |
* make available to user, and use on returned packets, |
* already checked. |
* but we don't yet have a way to check the checksum |
*/ |
* with options still present. |
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*/ |
if (uh->uh_sum == 0) |
if (iphlen > sizeof (struct ip)) { |
return 0; |
ip_stripoptions(m, (struct mbuf *)0); |
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iphlen = sizeof(struct ip); |
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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return 0; |
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badcsum: |
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udpstat.udps_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, ...) |
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{ |
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va_list ap; |
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struct sockaddr_in src, dst; |
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struct ip *ip; |
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struct udphdr *uh; |
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int iphlen; |
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int len; |
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int n; |
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u_int16_t ip_len; |
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va_start(ap, m); |
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iphlen = va_arg(ap, int); |
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(void)va_arg(ap, int); /* ignore value, advance ap */ |
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va_end(ap); |
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MCLAIM(m, &udp_rx_mowner); |
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udpstat.udps_ipackets++; |
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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 *); |
if (m->m_len < iphlen + sizeof(struct udphdr)) { |
IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); |
if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { |
if (uh == NULL) { |
udpstat.udps_hdrops++; |
udpstat.udps_hdrops++; |
return; |
return; |
} |
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ip = mtod(m, struct ip *); |
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} |
} |
uh = (struct udphdr *)((caddr_t)ip + iphlen); |
KASSERT(UDP_HDR_ALIGNED_P(uh)); |
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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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/* |
/* |
* Make mbuf data length reflect UDP length. |
* Make mbuf data length reflect UDP length. |
* If not enough data to reflect UDP length, drop. |
* If not enough data to reflect UDP length, drop. |
*/ |
*/ |
len = ntohs((u_short)uh->uh_ulen); |
ip_len = ntohs(ip->ip_len); |
if (ip->ip_len != len) { |
len = ntohs((u_int16_t)uh->uh_ulen); |
if (len > ip->ip_len) { |
if (ip_len != iphlen + len) { |
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if (ip_len < iphlen + len || len < sizeof(struct udphdr)) { |
udpstat.udps_badlen++; |
udpstat.udps_badlen++; |
goto bad; |
goto bad; |
} |
} |
m_adj(m, len - ip->ip_len); |
m_adj(m, iphlen + len - ip_len); |
/* ip->ip_len = len; */ |
|
} |
} |
/* |
|
* Save a copy of the IP header in case we want restore it |
|
* for sending an ICMP error message in response. |
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*/ |
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save_ip = *ip; |
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/* |
/* |
* Checksum extended UDP header and data. |
* Checksum extended UDP header and data. |
*/ |
*/ |
if (udpcksum && uh->uh_sum) { |
if (udp4_input_checksum(m, uh, iphlen, len)) |
((struct ipovly *)ip)->ih_next = 0; |
goto badcsum; |
((struct ipovly *)ip)->ih_prev = 0; |
|
((struct ipovly *)ip)->ih_x1 = 0; |
/* construct source and dst sockaddrs. */ |
((struct ipovly *)ip)->ih_len = uh->uh_ulen; |
sockaddr_in_init(&src, &ip->ip_src, uh->uh_sport); |
if (uh->uh_sum = in_cksum(m, len + sizeof (struct ip))) { |
sockaddr_in_init(&dst, &ip->ip_dst, uh->uh_dport); |
udpstat.udps_badsum++; |
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m_freem(m); |
if ((n = udp4_realinput(&src, &dst, &m, iphlen)) == -1) { |
return; |
udpstat.udps_hdrops++; |
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return; |
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} |
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#ifdef INET6 |
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if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { |
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struct sockaddr_in6 src6, dst6; |
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|
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bzero(&src6, sizeof(src6)); |
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src6.sin6_family = AF_INET6; |
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src6.sin6_len = sizeof(struct sockaddr_in6); |
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src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; |
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bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12], |
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sizeof(ip->ip_src)); |
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src6.sin6_port = uh->uh_sport; |
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bzero(&dst6, sizeof(dst6)); |
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dst6.sin6_family = AF_INET6; |
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dst6.sin6_len = sizeof(struct sockaddr_in6); |
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dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; |
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bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12], |
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sizeof(ip->ip_dst)); |
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dst6.sin6_port = uh->uh_dport; |
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|
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n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); |
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} |
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#endif |
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|
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if (n == 0) { |
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if (m->m_flags & (M_BCAST | M_MCAST)) { |
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udpstat.udps_noportbcast++; |
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goto bad; |
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} |
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udpstat.udps_noport++; |
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#ifdef IPKDB |
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if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, |
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m, iphlen + sizeof(struct udphdr), |
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m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { |
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/* |
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* It was a debugger connect packet, |
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* just drop it now |
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*/ |
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goto bad; |
} |
} |
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#endif |
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icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); |
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m = NULL; |
} |
} |
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bad: |
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if (m) |
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m_freem(m); |
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return; |
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badcsum: |
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m_freem(m); |
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} |
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#endif |
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#ifdef INET6 |
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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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/* |
/* |
* Locate pcb for datagram. |
* XXX it's better to record and check if this mbuf is |
|
* already checked. |
*/ |
*/ |
inp = udp_last_inpcb; |
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if (inp->inp_lport != uh->uh_dport || |
if (__predict_false((m->m_flags & M_LOOP) && !udp_do_loopback_cksum)) { |
inp->inp_fport != uh->uh_sport || |
goto good; |
inp->inp_faddr.s_addr != ip->ip_src.s_addr || |
|
inp->inp_laddr.s_addr != ip->ip_dst.s_addr) { |
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inp = in_pcblookup(&udb, ip->ip_src, uh->uh_sport, |
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ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD); |
|
if (inp) |
|
udp_last_inpcb = inp; |
|
udpstat.udpps_pcbcachemiss++; |
|
} |
} |
if (inp == 0) { |
if (uh->uh_sum == 0) { |
/* don't send ICMP response for broadcast packet */ |
udp6stat.udp6s_nosum++; |
udpstat.udps_noport++; |
goto bad; |
if (m->m_flags & M_BCAST) { |
} |
udpstat.udps_noportbcast++; |
|
|
switch (m->m_pkthdr.csum_flags & |
|
((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv6) | |
|
M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { |
|
case M_CSUM_UDPv6|M_CSUM_TCP_UDP_BAD: |
|
UDP_CSUM_COUNTER_INCR(&udp6_hwcsum_bad); |
|
udp6stat.udp6s_badsum++; |
|
goto bad; |
|
|
|
#if 0 /* notyet */ |
|
case M_CSUM_UDPv6|M_CSUM_DATA: |
|
#endif |
|
|
|
case M_CSUM_UDPv6: |
|
/* Checksum was okay. */ |
|
UDP_CSUM_COUNTER_INCR(&udp6_hwcsum_ok); |
|
break; |
|
|
|
default: |
|
/* |
|
* Need to compute it ourselves. Maybe skip checksum |
|
* on loopback interfaces. |
|
*/ |
|
UDP_CSUM_COUNTER_INCR(&udp6_swcsum); |
|
if (in6_cksum(m, IPPROTO_UDP, off, len) != 0) { |
|
udp6stat.udp6s_badsum++; |
goto bad; |
goto bad; |
} |
} |
*ip = save_ip; |
|
ip->ip_len += iphlen; |
|
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT); |
|
return; |
|
} |
} |
|
|
|
good: |
|
return 0; |
|
bad: |
|
return -1; |
|
} |
|
|
|
int |
|
udp6_input(struct mbuf **mp, int *offp, int 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; |
|
|
|
ip6 = mtod(m, struct ip6_hdr *); |
|
|
|
#if defined(NFAITH) && 0 < NFAITH |
|
if (faithprefix(&ip6->ip6_dst)) { |
|
/* send icmp6 host unreach? */ |
|
m_freem(m); |
|
return IPPROTO_DONE; |
|
} |
|
#endif |
|
|
|
udp6stat.udp6s_ipackets++; |
|
|
|
/* check for jumbogram is done in ip6_input. we can trust pkthdr.len */ |
|
plen = m->m_pkthdr.len - off; |
|
IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); |
|
if (uh == NULL) { |
|
ip6stat.ip6s_tooshort++; |
|
return IPPROTO_DONE; |
|
} |
|
KASSERT(UDP_HDR_ALIGNED_P(uh)); |
|
ulen = ntohs((u_short)uh->uh_ulen); |
/* |
/* |
* Construct sockaddr format source address. |
* RFC2675 section 4: jumbograms will have 0 in the UDP header field, |
* Stuff source address and datagram in user buffer. |
* iff payload length > 0xffff. |
*/ |
*/ |
udp_in.sin_port = uh->uh_sport; |
if (ulen == 0 && plen > 0xffff) |
udp_in.sin_addr = ip->ip_src; |
ulen = plen; |
if (inp->inp_flags & INP_CONTROLOPTS) { |
|
struct mbuf **mp = &opts; |
if (plen != ulen) { |
struct mbuf *udp_saveopt(); |
udp6stat.udp6s_badlen++; |
|
goto bad; |
if (inp->inp_flags & INP_RECVDSTADDR) { |
} |
*mp = udp_saveopt((caddr_t) &ip->ip_dst, |
|
sizeof(struct in_addr), IP_RECVDSTADDR); |
/* destination port of 0 is illegal, based on RFC768. */ |
if (*mp) |
if (uh->uh_dport == 0) |
mp = &(*mp)->m_next; |
goto bad; |
} |
|
#ifdef notyet |
/* Be proactive about malicious use of IPv4 mapped address */ |
/* options were tossed above */ |
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
if (inp->inp_flags & INP_RECVOPTS) { |
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
*mp = udp_saveopt((caddr_t) opts_deleted_above, |
/* XXX stat */ |
sizeof(struct in_addr), IP_RECVOPTS); |
goto bad; |
if (*mp) |
} |
mp = &(*mp)->m_next; |
|
} |
/* |
/* ip_srcroute doesn't do what we want here, need to fix */ |
* Checksum extended UDP header and data. Maybe skip checksum |
if (inp->inp_flags & INP_RECVRETOPTS) { |
* on loopback interfaces. |
*mp = udp_saveopt((caddr_t) ip_srcroute(), |
*/ |
sizeof(struct in_addr), IP_RECVRETOPTS); |
if (udp6_input_checksum(m, uh, off, ulen)) |
if (*mp) |
goto bad; |
mp = &(*mp)->m_next; |
|
|
/* |
|
* Construct source and dst sockaddrs. |
|
*/ |
|
bzero(&src, sizeof(src)); |
|
src.sin6_family = AF_INET6; |
|
src.sin6_len = sizeof(struct sockaddr_in6); |
|
src.sin6_addr = ip6->ip6_src; |
|
src.sin6_port = uh->uh_sport; |
|
bzero(&dst, sizeof(dst)); |
|
dst.sin6_family = AF_INET6; |
|
dst.sin6_len = sizeof(struct sockaddr_in6); |
|
dst.sin6_addr = ip6->ip6_dst; |
|
dst.sin6_port = uh->uh_dport; |
|
|
|
if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { |
|
if (m->m_flags & M_MCAST) { |
|
udp6stat.udp6s_noportmcast++; |
|
goto bad; |
|
} |
|
udp6stat.udp6s_noport++; |
|
icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); |
|
m = NULL; |
|
} |
|
|
|
bad: |
|
if (m) |
|
m_freem(m); |
|
return IPPROTO_DONE; |
|
} |
|
#endif |
|
|
|
#ifdef INET |
|
static void |
|
udp4_sendup(struct mbuf *m, int off /* offset of data portion */, |
|
struct sockaddr *src, struct socket *so) |
|
{ |
|
struct mbuf *opts = NULL; |
|
struct mbuf *n; |
|
struct inpcb *inp = NULL; |
|
|
|
if (!so) |
|
return; |
|
switch (so->so_proto->pr_domain->dom_family) { |
|
case AF_INET: |
|
inp = sotoinpcb(so); |
|
break; |
|
#ifdef INET6 |
|
case AF_INET6: |
|
break; |
|
#endif |
|
default: |
|
return; |
|
} |
|
|
|
#if defined(IPSEC) || defined(FAST_IPSEC) |
|
/* check AH/ESP integrity. */ |
|
if (so != NULL && ipsec4_in_reject_so(m, so)) { |
|
ipsecstat.in_polvio++; |
|
if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) |
|
icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT, |
|
0, 0); |
|
return; |
|
} |
|
#endif /*IPSEC*/ |
|
|
|
if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { |
|
if (inp && (inp->inp_flags & INP_CONTROLOPTS |
|
|| so->so_options & SO_TIMESTAMP)) { |
|
struct ip *ip = mtod(n, struct ip *); |
|
ip_savecontrol(inp, &opts, ip, n); |
} |
} |
|
|
|
m_adj(n, off); |
|
if (sbappendaddr(&so->so_rcv, src, n, |
|
opts) == 0) { |
|
m_freem(n); |
|
if (opts) |
|
m_freem(opts); |
|
so->so_rcv.sb_overflowed++; |
|
udpstat.udps_fullsock++; |
|
} else |
|
sorwakeup(so); |
|
} |
|
} |
#endif |
#endif |
|
|
|
#ifdef INET6 |
|
static void |
|
udp6_sendup(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); |
|
|
|
#if defined(IPSEC) || defined(FAST_IPSEC) |
|
/* check AH/ESP integrity. */ |
|
if (so != NULL && ipsec6_in_reject_so(m, so)) { |
|
ipsec6stat.in_polvio++; |
|
if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) |
|
icmp6_error(n, ICMP6_DST_UNREACH, |
|
ICMP6_DST_UNREACH_ADMIN, 0); |
|
return; |
} |
} |
iphlen += sizeof(struct udphdr); |
#endif /*IPSEC*/ |
m->m_len -= iphlen; |
|
m->m_pkthdr.len -= iphlen; |
if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { |
m->m_data += iphlen; |
if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS |
if (sbappendaddr(&inp->inp_socket->so_rcv, (struct sockaddr *)&udp_in, |
|| in6p->in6p_socket->so_options & SO_TIMESTAMP)) { |
m, opts) == 0) { |
struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *); |
udpstat.udps_fullsock++; |
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); |
|
so->so_rcv.sb_overflowed++; |
|
udp6stat.udp6s_fullsock++; |
|
} else |
|
sorwakeup(so); |
|
} |
|
} |
|
#endif |
|
|
|
#ifdef INET |
|
static int |
|
udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst, |
|
struct mbuf **mp, int off /* offset of udphdr */) |
|
{ |
|
u_int16_t *sport, *dport; |
|
int rcvcnt; |
|
struct in_addr *src4, *dst4; |
|
struct inpcb_hdr *inph; |
|
struct inpcb *inp; |
|
struct mbuf *m = *mp; |
|
|
|
rcvcnt = 0; |
|
off += sizeof(struct udphdr); /* now, offset of payload */ |
|
|
|
if (src->sin_family != AF_INET || dst->sin_family != AF_INET) |
goto bad; |
goto bad; |
|
|
|
src4 = &src->sin_addr; |
|
sport = &src->sin_port; |
|
dst4 = &dst->sin_addr; |
|
dport = &dst->sin_port; |
|
|
|
if (IN_MULTICAST(dst4->s_addr) || |
|
in_broadcast(*dst4, m->m_pkthdr.rcvif)) { |
|
/* |
|
* Deliver a multicast or broadcast datagram to *all* sockets |
|
* for which the local and remote addresses and ports match |
|
* those of the incoming datagram. This allows more than |
|
* one process to receive multi/broadcasts on the same port. |
|
* (This really ought to be done for unicast datagrams as |
|
* well, but that would cause problems with existing |
|
* applications that open both address-specific sockets and |
|
* a wildcard socket listening to the same port -- they would |
|
* end up receiving duplicates of every unicast datagram. |
|
* Those applications open the multiple sockets to overcome an |
|
* inadequacy of the UDP socket interface, but for backwards |
|
* compatibility we avoid the problem here rather than |
|
* fixing the interface. Maybe 4.5BSD will remedy this?) |
|
*/ |
|
|
|
/* |
|
* KAME note: 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) { |
|
inp = (struct inpcb *)inph; |
|
if (inp->inp_af != AF_INET) |
|
continue; |
|
|
|
if (inp->inp_lport != *dport) |
|
continue; |
|
if (!in_nullhost(inp->inp_laddr)) { |
|
if (!in_hosteq(inp->inp_laddr, *dst4)) |
|
continue; |
|
} |
|
if (!in_nullhost(inp->inp_faddr)) { |
|
if (!in_hosteq(inp->inp_faddr, *src4) || |
|
inp->inp_fport != *sport) |
|
continue; |
|
} |
|
|
|
udp4_sendup(m, off, (struct sockaddr *)src, |
|
inp->inp_socket); |
|
rcvcnt++; |
|
|
|
/* |
|
* Don't look for additional matches if this one does |
|
* not have either the SO_REUSEPORT or SO_REUSEADDR |
|
* socket options set. This heuristic avoids searching |
|
* through all pcbs in the common case of a non-shared |
|
* port. It assumes that an application will never |
|
* clear these options after setting them. |
|
*/ |
|
if ((inp->inp_socket->so_options & |
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
|
break; |
|
} |
|
} else { |
|
/* |
|
* Locate pcb for datagram. |
|
*/ |
|
inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport); |
|
if (inp == 0) { |
|
++udpstat.udps_pcbhashmiss; |
|
inp = in_pcblookup_bind(&udbtable, *dst4, *dport); |
|
if (inp == 0) |
|
return rcvcnt; |
|
} |
|
|
|
#ifdef IPSEC_NAT_T |
|
/* 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 |
|
|
|
udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
|
rcvcnt++; |
} |
} |
sorwakeup(inp->inp_socket); |
|
return; |
|
bad: |
bad: |
m_freem(m); |
return rcvcnt; |
if (opts) |
|
m_freem(opts); |
|
} |
} |
|
#endif |
|
|
/* |
#ifdef INET6 |
* Create a "control" mbuf containing the specified data |
static int |
* with the specified type for presentation with a datagram. |
udp6_realinput(int af, struct sockaddr_in6 *src, struct sockaddr_in6 *dst, |
*/ |
struct mbuf *m, int off) |
struct mbuf * |
|
udp_saveopt(p, size, type) |
|
caddr_t p; |
|
register int size; |
|
int type; |
|
{ |
{ |
register struct cmsghdr *cp; |
u_int16_t sport, dport; |
struct mbuf *m; |
int rcvcnt; |
|
struct in6_addr src6, *dst6; |
|
const struct in_addr *dst4; |
|
struct inpcb_hdr *inph; |
|
struct in6pcb *in6p; |
|
|
if ((m = m_get(M_DONTWAIT, MT_CONTROL)) == NULL) |
rcvcnt = 0; |
return ((struct mbuf *) NULL); |
off += sizeof(struct udphdr); /* now, offset of payload */ |
cp = (struct cmsghdr *) mtod(m, struct cmsghdr *); |
|
bcopy(p, (caddr_t)(cp + 1), size); |
if (af != AF_INET && af != AF_INET6) |
size += sizeof(*cp); |
goto bad; |
m->m_len = size; |
if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6) |
cp->cmsg_len = size; |
goto bad; |
cp->cmsg_level = IPPROTO_IP; |
|
cp->cmsg_type = type; |
src6 = src->sin6_addr; |
return (m); |
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 |
|
* 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, |
|
dport, 0); |
|
if (in6p == 0) { |
|
++udpstat.udps_pcbhashmiss; |
|
in6p = in6_pcblookup_bind(&udbtable, dst6, dport, 0); |
|
if (in6p == 0) |
|
return rcvcnt; |
|
} |
|
|
|
udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); |
|
rcvcnt++; |
|
} |
|
|
|
bad: |
|
return rcvcnt; |
} |
} |
|
#endif |
|
|
|
#ifdef INET |
/* |
/* |
* Notify a udp user of an asynchronous error; |
* Notify a udp user of an asynchronous error; |
* just wake up so that he can collect error status. |
* just wake up so that he can collect error status. |
*/ |
*/ |
udp_notify(inp, errno) |
static void |
register struct inpcb *inp; |
udp_notify(struct inpcb *inp, int errno) |
{ |
{ |
|
|
inp->inp_socket->so_error = errno; |
inp->inp_socket->so_error = errno; |
sorwakeup(inp->inp_socket); |
sorwakeup(inp->inp_socket); |
sowwakeup(inp->inp_socket); |
sowwakeup(inp->inp_socket); |
} |
} |
|
|
udp_ctlinput(cmd, sa, ip) |
void * |
int cmd; |
udp_ctlinput(int cmd, const struct sockaddr *sa, void *v) |
struct sockaddr *sa; |
{ |
register struct ip *ip; |
struct ip *ip = v; |
{ |
struct udphdr *uh; |
register struct udphdr *uh; |
void (*notify)(struct inpcb *, int) = udp_notify; |
extern struct in_addr zeroin_addr; |
int errno; |
extern u_char inetctlerrmap[]; |
|
|
if (sa->sa_family != AF_INET |
if ((unsigned)cmd > PRC_NCMDS || inetctlerrmap[cmd] == 0) |
|| sa->sa_len != sizeof(struct sockaddr_in)) |
return; |
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) { |
if (ip) { |
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); |
uh = (struct udphdr *)((char *)ip + (ip->ip_hl << 2)); |
in_pcbnotify(&udb, sa, uh->uh_dport, ip->ip_src, uh->uh_sport, |
in_pcbnotify(&udbtable, satocsin(sa)->sin_addr, uh->uh_dport, |
cmd, udp_notify); |
ip->ip_src, uh->uh_sport, errno, notify); |
|
|
|
/* XXX mapped address case */ |
} else |
} else |
in_pcbnotify(&udb, sa, 0, zeroin_addr, 0, cmd, udp_notify); |
in_pcbnotifyall(&udbtable, satocsin(sa)->sin_addr, errno, |
|
notify); |
|
return NULL; |
} |
} |
|
|
udp_output(inp, m, addr, control) |
int |
register struct inpcb *inp; |
udp_ctloutput(int op, struct socket *so, int level, int optname, |
register struct mbuf *m; |
struct mbuf **mp) |
struct mbuf *addr, *control; |
|
{ |
{ |
register struct udpiphdr *ui; |
int s; |
register int len = m->m_pkthdr.len; |
int error = 0; |
struct in_addr laddr; |
struct mbuf *m; |
int s, error = 0; |
struct inpcb *inp; |
|
int family; |
|
|
if (control) |
family = so->so_proto->pr_domain->dom_family; |
m_freem(control); /* XXX */ |
|
|
|
if (addr) { |
s = splsoftnet(); |
laddr = inp->inp_laddr; |
switch (family) { |
if (inp->inp_faddr.s_addr != INADDR_ANY) { |
#ifdef INET |
error = EISCONN; |
case PF_INET: |
goto release; |
if (level != IPPROTO_UDP) { |
|
error = ip_ctloutput(op, so, level, optname, mp); |
|
goto end; |
} |
} |
/* |
break; |
* Must block input while temporarily connected. |
#endif |
*/ |
#ifdef INET6 |
s = splnet(); |
case PF_INET6: |
error = in_pcbconnect(inp, addr); |
if (level != IPPROTO_UDP) { |
if (error) { |
error = ip6_ctloutput(op, so, level, optname, mp); |
splx(s); |
goto end; |
goto release; |
|
} |
} |
} else { |
break; |
if (inp->inp_faddr.s_addr == INADDR_ANY) { |
#endif |
error = ENOTCONN; |
default: |
goto release; |
error = EAFNOSUPPORT; |
|
goto end; |
|
} |
|
|
|
|
|
switch (op) { |
|
case PRCO_SETOPT: |
|
m = *mp; |
|
inp = sotoinpcb(so); |
|
|
|
switch (optname) { |
|
case UDP_ENCAP: |
|
if (m == NULL || m->m_len != sizeof(int)) { |
|
error = EINVAL; |
|
break; |
|
} |
|
|
|
switch(*mtod(m, int *)) { |
|
#ifdef IPSEC_NAT_T |
|
case 0: |
|
inp->inp_flags &= ~INP_ESPINUDP_ALL; |
|
break; |
|
|
|
case UDP_ENCAP_ESPINUDP: |
|
inp->inp_flags &= ~INP_ESPINUDP_ALL; |
|
inp->inp_flags |= INP_ESPINUDP; |
|
break; |
|
|
|
case UDP_ENCAP_ESPINUDP_NON_IKE: |
|
inp->inp_flags &= ~INP_ESPINUDP_ALL; |
|
inp->inp_flags |= INP_ESPINUDP_NON_IKE; |
|
break; |
|
#endif |
|
default: |
|
error = EINVAL; |
|
break; |
|
} |
|
break; |
|
|
|
default: |
|
error = ENOPROTOOPT; |
|
break; |
} |
} |
|
if (m != NULL) { |
|
m_free(m); |
|
} |
|
break; |
|
|
|
default: |
|
error = EINVAL; |
|
break; |
} |
} |
|
|
|
end: |
|
splx(s); |
|
return error; |
|
} |
|
|
|
|
|
int |
|
udp_output(struct mbuf *m, ...) |
|
{ |
|
struct inpcb *inp; |
|
struct udpiphdr *ui; |
|
struct route *ro; |
|
int len = m->m_pkthdr.len; |
|
int error = 0; |
|
va_list ap; |
|
|
|
MCLAIM(m, &udp_tx_mowner); |
|
va_start(ap, m); |
|
inp = va_arg(ap, struct inpcb *); |
|
va_end(ap); |
|
|
/* |
/* |
* Calculate data length and get a mbuf |
* Calculate data length and get a mbuf |
* for UDP and IP headers. |
* for UDP and IP headers. |
*/ |
*/ |
M_PREPEND(m, sizeof(struct udpiphdr), M_WAIT); |
M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); |
|
if (m == 0) { |
|
error = ENOBUFS; |
|
goto release; |
|
} |
|
|
|
/* |
|
* 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; |
|
} |
|
|
/* |
/* |
* Fill in mbuf with extended UDP header |
* Fill in mbuf with extended UDP header |
* and addresses and length put into network format. |
* and addresses and length put into network format. |
*/ |
*/ |
ui = mtod(m, struct udpiphdr *); |
ui = mtod(m, struct udpiphdr *); |
ui->ui_next = ui->ui_prev = 0; |
|
ui->ui_x1 = 0; |
|
ui->ui_pr = IPPROTO_UDP; |
ui->ui_pr = IPPROTO_UDP; |
ui->ui_len = htons((u_short)len + sizeof (struct udphdr)); |
|
ui->ui_src = inp->inp_laddr; |
ui->ui_src = inp->inp_laddr; |
ui->ui_dst = inp->inp_faddr; |
ui->ui_dst = inp->inp_faddr; |
ui->ui_sport = inp->inp_lport; |
ui->ui_sport = inp->inp_lport; |
ui->ui_dport = inp->inp_fport; |
ui->ui_dport = inp->inp_fport; |
ui->ui_ulen = ui->ui_len; |
ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr)); |
|
|
|
ro = &inp->inp_route; |
|
|
/* |
/* |
* Stuff checksum and output datagram. |
* Set up checksum and output datagram. |
*/ |
*/ |
ui->ui_sum = 0; |
|
if (udpcksum) { |
if (udpcksum) { |
if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) |
/* |
ui->ui_sum = 0xffff; |
* XXX Cache pseudo-header checksum part for |
} |
* XXX "connected" UDP sockets. |
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; |
*/ |
|
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_ttl = inp->inp_ip.ip_ttl; /* XXX */ |
((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ |
((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ |
udpstat.udps_opackets++; |
udpstat.udps_opackets++; |
error = ip_output(m, inp->inp_options, &inp->inp_route, |
|
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)); |
|
|
|
if (addr) { |
return (ip_output(m, inp->inp_options, ro, |
in_pcbdisconnect(inp); |
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), |
inp->inp_laddr = laddr; |
inp->inp_moptions, inp->inp_socket)); |
splx(s); |
|
} |
|
return (error); |
|
|
|
release: |
release: |
m_freem(m); |
m_freem(m); |
return (error); |
return (error); |
} |
} |
|
|
u_long udp_sendspace = 9216; /* really max datagram size */ |
int udp_sendspace = 9216; /* really max datagram size */ |
u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); |
int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); |
/* 40 1K datagrams */ |
/* 40 1K datagrams */ |
|
|
/*ARGSUSED*/ |
/*ARGSUSED*/ |
udp_usrreq(so, req, m, addr, control) |
int |
struct socket *so; |
udp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, |
int req; |
struct mbuf *control, struct lwp *l) |
struct mbuf *m, *addr, *control; |
|
{ |
{ |
struct inpcb *inp = sotoinpcb(so); |
struct inpcb *inp; |
int error = 0; |
|
int s; |
int s; |
|
int error = 0; |
|
|
if (req == PRU_CONTROL) |
if (req == PRU_CONTROL) |
return (in_control(so, (int)m, (caddr_t)addr, |
return (in_control(so, (long)m, (void *)nam, |
(struct ifnet *)control)); |
(struct ifnet *)control, l)); |
if (inp == NULL && req != PRU_ATTACH) { |
|
|
s = splsoftnet(); |
|
|
|
if (req == PRU_PURGEIF) { |
|
in_pcbpurgeif0(&udbtable, (struct ifnet *)control); |
|
in_purgeif((struct ifnet *)control); |
|
in_pcbpurgeif(&udbtable, (struct ifnet *)control); |
|
splx(s); |
|
return (0); |
|
} |
|
|
|
inp = sotoinpcb(so); |
|
#ifdef DIAGNOSTIC |
|
if (req != PRU_SEND && req != PRU_SENDOOB && control) |
|
panic("udp_usrreq: unexpected control mbuf"); |
|
#endif |
|
if (inp == 0 && req != PRU_ATTACH) { |
error = EINVAL; |
error = EINVAL; |
goto release; |
goto release; |
} |
} |
|
|
/* |
/* |
* Note: need to block udp_input while changing |
* Note: need to block udp_input while changing |
* the udp pcb queue and/or pcb addresses. |
* the udp pcb queue and/or pcb addresses. |
Line 389 udp_usrreq(so, req, m, addr, control) |
|
Line 1197 udp_usrreq(so, req, m, addr, control) |
|
switch (req) { |
switch (req) { |
|
|
case PRU_ATTACH: |
case PRU_ATTACH: |
if (inp != NULL) { |
if (inp != 0) { |
error = EINVAL; |
error = EISCONN; |
break; |
break; |
} |
} |
s = splnet(); |
#ifdef MBUFTRACE |
error = in_pcballoc(so, &udb); |
so->so_mowner = &udp_mowner; |
splx(s); |
so->so_rcv.sb_mowner = &udp_rx_mowner; |
if (error) |
so->so_snd.sb_mowner = &udp_tx_mowner; |
break; |
#endif |
error = soreserve(so, udp_sendspace, udp_recvspace); |
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) |
if (error) |
break; |
break; |
((struct inpcb *) so->so_pcb)->inp_ip.ip_ttl = udp_ttl; |
inp = sotoinpcb(so); |
|
inp->inp_ip.ip_ttl = ip_defttl; |
break; |
break; |
|
|
case PRU_DETACH: |
case PRU_DETACH: |
udp_detach(inp); |
in_pcbdetach(inp); |
break; |
break; |
|
|
case PRU_BIND: |
case PRU_BIND: |
s = splnet(); |
error = in_pcbbind(inp, nam, l); |
error = in_pcbbind(inp, addr); |
|
splx(s); |
|
break; |
break; |
|
|
case PRU_LISTEN: |
case PRU_LISTEN: |
Line 419 udp_usrreq(so, req, m, addr, control) |
|
Line 1231 udp_usrreq(so, req, m, addr, control) |
|
break; |
break; |
|
|
case PRU_CONNECT: |
case PRU_CONNECT: |
if (inp->inp_faddr.s_addr != INADDR_ANY) { |
error = in_pcbconnect(inp, nam, l); |
error = EISCONN; |
if (error) |
break; |
break; |
} |
soisconnected(so); |
s = splnet(); |
|
error = in_pcbconnect(inp, addr); |
|
splx(s); |
|
if (error == 0) |
|
soisconnected(so); |
|
break; |
break; |
|
|
case PRU_CONNECT2: |
case PRU_CONNECT2: |
error = EOPNOTSUPP; |
error = EOPNOTSUPP; |
break; |
break; |
|
|
case PRU_ACCEPT: |
|
error = EOPNOTSUPP; |
|
break; |
|
|
|
case PRU_DISCONNECT: |
case PRU_DISCONNECT: |
if (inp->inp_faddr.s_addr == INADDR_ANY) { |
/*soisdisconnected(so);*/ |
error = ENOTCONN; |
so->so_state &= ~SS_ISCONNECTED; /* XXX */ |
break; |
|
} |
|
s = splnet(); |
|
in_pcbdisconnect(inp); |
in_pcbdisconnect(inp); |
inp->inp_laddr.s_addr = INADDR_ANY; |
inp->inp_laddr = zeroin_addr; /* XXX */ |
splx(s); |
in_pcbstate(inp, INP_BOUND); /* XXX */ |
so->so_state &= ~SS_ISCONNECTED; /* XXX */ |
|
break; |
break; |
|
|
case PRU_SHUTDOWN: |
case PRU_SHUTDOWN: |
socantsendmore(so); |
socantsendmore(so); |
break; |
break; |
|
|
case PRU_SEND: |
case PRU_RCVD: |
return (udp_output(inp, m, addr, control)); |
error = EOPNOTSUPP; |
|
|
case PRU_ABORT: |
|
soisdisconnected(so); |
|
udp_detach(inp); |
|
break; |
break; |
|
|
case PRU_SOCKADDR: |
case PRU_SEND: |
in_setsockaddr(inp, addr); |
if (control && control->m_len) { |
break; |
m_freem(control); |
|
m_freem(m); |
|
error = EINVAL; |
|
break; |
|
} |
|
{ |
|
struct in_addr laddr; /* XXX */ |
|
|
case PRU_PEERADDR: |
if (nam) { |
in_setpeeraddr(inp, addr); |
laddr = inp->inp_laddr; /* XXX */ |
|
if ((so->so_state & SS_ISCONNECTED) != 0) { |
|
error = EISCONN; |
|
goto die; |
|
} |
|
error = in_pcbconnect(inp, nam, l); |
|
if (error) |
|
goto die; |
|
} else { |
|
if ((so->so_state & SS_ISCONNECTED) == 0) { |
|
error = ENOTCONN; |
|
goto die; |
|
} |
|
} |
|
error = udp_output(m, inp); |
|
m = NULL; |
|
if (nam) { |
|
in_pcbdisconnect(inp); |
|
inp->inp_laddr = laddr; /* XXX */ |
|
in_pcbstate(inp, INP_BOUND); /* XXX */ |
|
} |
|
die: |
|
if (m) |
|
m_freem(m); |
|
} |
break; |
break; |
|
|
case PRU_SENSE: |
case PRU_SENSE: |
/* |
/* |
* stat: don't bother with a blocksize. |
* stat: don't bother with a blocksize. |
*/ |
*/ |
|
splx(s); |
return (0); |
return (0); |
|
|
|
case PRU_RCVOOB: |
|
error = EOPNOTSUPP; |
|
break; |
|
|
case PRU_SENDOOB: |
case PRU_SENDOOB: |
case PRU_FASTTIMO: |
m_freem(control); |
case PRU_SLOWTIMO: |
m_freem(m); |
case PRU_PROTORCV: |
|
case PRU_PROTOSEND: |
|
error = EOPNOTSUPP; |
error = EOPNOTSUPP; |
break; |
break; |
|
|
case PRU_RCVD: |
case PRU_SOCKADDR: |
case PRU_RCVOOB: |
in_setsockaddr(inp, nam); |
return (EOPNOTSUPP); /* do not free mbuf's */ |
break; |
|
|
|
case PRU_PEERADDR: |
|
in_setpeeraddr(inp, nam); |
|
break; |
|
|
default: |
default: |
panic("udp_usrreq"); |
panic("udp_usrreq"); |
} |
} |
|
|
release: |
release: |
if (control) { |
splx(s); |
printf("udp control data unexpectedly retained\n"); |
|
m_freem(control); |
|
} |
|
if (m) |
|
m_freem(m); |
|
return (error); |
return (error); |
} |
} |
|
|
udp_detach(inp) |
/* |
struct inpcb *inp; |
* Sysctl for udp variables. |
|
*/ |
|
SYSCTL_SETUP(sysctl_net_inet_udp_setup, "sysctl net.inet.udp subtree setup") |
{ |
{ |
int s = splnet(); |
|
|
|
if (inp == udp_last_inpcb) |
sysctl_createv(clog, 0, NULL, NULL, |
udp_last_inpcb = &udb; |
CTLFLAG_PERMANENT, |
in_pcbdetach(inp); |
CTLTYPE_NODE, "net", NULL, |
splx(s); |
NULL, 0, NULL, 0, |
|
CTL_NET, CTL_EOL); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
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"), |
|
NULL, 0, &udpstat, sizeof(udpstat), |
|
CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_STATS, |
|
CTL_EOL); |
|
} |
|
#endif |
|
|
|
#if (defined INET && defined IPSEC_NAT_T) |
|
/* |
|
* Returns: |
|
* 1 if the packet was processed |
|
* 0 if normal UDP processing should take place |
|
* -1 if an error occurent and m was freed |
|
*/ |
|
static int |
|
udp4_espinudp(struct mbuf **mp, int off, struct sockaddr *src, |
|
struct socket *so) |
|
{ |
|
size_t len; |
|
void *data; |
|
struct inpcb *inp; |
|
size_t skip = 0; |
|
size_t minlen; |
|
size_t iphdrlen; |
|
struct ip *ip; |
|
struct mbuf *n; |
|
struct m_tag *tag; |
|
struct udphdr *udphdr; |
|
u_int16_t sport, dport; |
|
struct mbuf *m = *mp; |
|
|
|
/* |
|
* Collapse the mbuf chain if the first mbuf is too short |
|
* The longest case is: UDP + non ESP marker + ESP |
|
*/ |
|
minlen = off + sizeof(u_int64_t) + sizeof(struct esp); |
|
if (minlen > m->m_pkthdr.len) |
|
minlen = m->m_pkthdr.len; |
|
|
|
if (m->m_len < minlen) { |
|
if ((*mp = m_pullup(m, minlen)) == NULL) { |
|
printf("udp4_espinudp: m_pullup failed\n"); |
|
return -1; |
|
} |
|
m = *mp; |
|
} |
|
|
|
len = m->m_len - off; |
|
data = mtod(m, char *) + off; |
|
inp = sotoinpcb(so); |
|
|
|
/* Ignore keepalive packets */ |
|
if ((len == 1) && (*(unsigned char *)data == 0xff)) { |
|
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; |
|
|
|
/* |
|
* Copy the mbuf to avoid multiple free, as both |
|
* esp4_input (which we call) and udp_input (which |
|
* 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 |
|
* 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(n); |
|
return 0; |
|
} |
|
((u_int16_t *)(tag + 1))[0] = sport; |
|
((u_int16_t *)(tag + 1))[1] = dport; |
|
m_tag_prepend(n, tag); |
|
|
|
#ifdef FAST_IPSEC |
|
ipsec4_common_input(n, iphdrlen, IPPROTO_ESP); |
|
#else |
|
esp4_input(n, iphdrlen); |
|
#endif |
|
|
|
/* We handled it, it shoudln't be handled by UDP */ |
|
return 1; |
} |
} |
|
#endif |