65907cccb6
This will make INVARIANT-enabled modules, that use this function to load successfully on a kernel that has INVARIANT_SUPPORT only.
2936 lines
74 KiB
C
2936 lines
74 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1991, 1993, 1995
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* The Regents of the University of California.
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* Copyright (c) 2007-2009 Robert N. M. Watson
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* Copyright (c) 2010-2011 Juniper Networks, Inc.
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* All rights reserved.
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*
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* Portions of this software were developed by Robert N. M. Watson under
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* contract to Juniper Networks, Inc.
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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
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. 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
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ddb.h"
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#include "opt_ipsec.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ratelimit.h"
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#include "opt_pcbgroup.h"
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#include "opt_rss.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/callout.h>
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#include <sys/eventhandler.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/rmlock.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sockio.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/refcount.h>
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#include <sys/jail.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#ifdef DDB
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#include <ddb/ddb.h>
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#endif
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#include <vm/uma.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_types.h>
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#include <net/if_llatbl.h>
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#include <net/route.h>
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#include <net/rss_config.h>
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#include <net/vnet.h>
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#if defined(INET) || defined(INET6)
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#include <netinet/in.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/tcp_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#endif
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#ifdef INET
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#include <netinet/in_var.h>
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#endif
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#ifdef INET6
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#include <netinet/ip6.h>
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#include <netinet6/in6_pcb.h>
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#include <netinet6/in6_var.h>
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#include <netinet6/ip6_var.h>
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#endif /* INET6 */
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#include <netipsec/ipsec_support.h>
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#include <security/mac/mac_framework.h>
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static struct callout ipport_tick_callout;
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/*
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* These configure the range of local port addresses assigned to
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* "unspecified" outgoing connections/packets/whatever.
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*/
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VNET_DEFINE(int, ipport_lowfirstauto) = IPPORT_RESERVED - 1; /* 1023 */
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VNET_DEFINE(int, ipport_lowlastauto) = IPPORT_RESERVEDSTART; /* 600 */
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VNET_DEFINE(int, ipport_firstauto) = IPPORT_EPHEMERALFIRST; /* 10000 */
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VNET_DEFINE(int, ipport_lastauto) = IPPORT_EPHEMERALLAST; /* 65535 */
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VNET_DEFINE(int, ipport_hifirstauto) = IPPORT_HIFIRSTAUTO; /* 49152 */
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VNET_DEFINE(int, ipport_hilastauto) = IPPORT_HILASTAUTO; /* 65535 */
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/*
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* Reserved ports accessible only to root. There are significant
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* security considerations that must be accounted for when changing these,
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* but the security benefits can be great. Please be careful.
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*/
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VNET_DEFINE(int, ipport_reservedhigh) = IPPORT_RESERVED - 1; /* 1023 */
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VNET_DEFINE(int, ipport_reservedlow);
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/* Variables dealing with random ephemeral port allocation. */
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VNET_DEFINE(int, ipport_randomized) = 1; /* user controlled via sysctl */
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VNET_DEFINE(int, ipport_randomcps) = 10; /* user controlled via sysctl */
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VNET_DEFINE(int, ipport_randomtime) = 45; /* user controlled via sysctl */
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VNET_DEFINE(int, ipport_stoprandom); /* toggled by ipport_tick */
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VNET_DEFINE(int, ipport_tcpallocs);
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static VNET_DEFINE(int, ipport_tcplastcount);
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#define V_ipport_tcplastcount VNET(ipport_tcplastcount)
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static void in_pcbremlists(struct inpcb *inp);
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#ifdef INET
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static struct inpcb *in_pcblookup_hash_locked(struct inpcbinfo *pcbinfo,
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struct in_addr faddr, u_int fport_arg,
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struct in_addr laddr, u_int lport_arg,
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int lookupflags, struct ifnet *ifp);
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#define RANGECHK(var, min, max) \
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if ((var) < (min)) { (var) = (min); } \
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else if ((var) > (max)) { (var) = (max); }
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static int
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sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
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{
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int error;
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error = sysctl_handle_int(oidp, arg1, arg2, req);
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if (error == 0) {
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RANGECHK(V_ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
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RANGECHK(V_ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
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RANGECHK(V_ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX);
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RANGECHK(V_ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX);
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RANGECHK(V_ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX);
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RANGECHK(V_ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX);
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}
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return (error);
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}
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#undef RANGECHK
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static SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0,
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"IP Ports");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst,
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CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
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&VNET_NAME(ipport_lowfirstauto), 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast,
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CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
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&VNET_NAME(ipport_lowlastauto), 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first,
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CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
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&VNET_NAME(ipport_firstauto), 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last,
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CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
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&VNET_NAME(ipport_lastauto), 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst,
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CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
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&VNET_NAME(ipport_hifirstauto), 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast,
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CTLFLAG_VNET | CTLTYPE_INT | CTLFLAG_RW,
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&VNET_NAME(ipport_hilastauto), 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedhigh,
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CTLFLAG_VNET | CTLFLAG_RW | CTLFLAG_SECURE,
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&VNET_NAME(ipport_reservedhigh), 0, "");
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SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow,
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CTLFLAG_RW|CTLFLAG_SECURE, &VNET_NAME(ipport_reservedlow), 0, "");
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SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomized,
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CTLFLAG_VNET | CTLFLAG_RW,
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&VNET_NAME(ipport_randomized), 0, "Enable random port allocation");
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SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomcps,
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CTLFLAG_VNET | CTLFLAG_RW,
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&VNET_NAME(ipport_randomcps), 0, "Maximum number of random port "
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"allocations before switching to a sequental one");
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SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomtime,
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CTLFLAG_VNET | CTLFLAG_RW,
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&VNET_NAME(ipport_randomtime), 0,
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"Minimum time to keep sequental port "
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"allocation before switching to a random one");
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#endif /* INET */
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/*
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* in_pcb.c: manage the Protocol Control Blocks.
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*
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* NOTE: It is assumed that most of these functions will be called with
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* the pcbinfo lock held, and often, the inpcb lock held, as these utility
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* functions often modify hash chains or addresses in pcbs.
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*/
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/*
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* Initialize an inpcbinfo -- we should be able to reduce the number of
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* arguments in time.
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*/
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void
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in_pcbinfo_init(struct inpcbinfo *pcbinfo, const char *name,
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struct inpcbhead *listhead, int hash_nelements, int porthash_nelements,
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char *inpcbzone_name, uma_init inpcbzone_init, uma_fini inpcbzone_fini,
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uint32_t inpcbzone_flags, u_int hashfields)
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{
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INP_INFO_LOCK_INIT(pcbinfo, name);
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INP_HASH_LOCK_INIT(pcbinfo, "pcbinfohash"); /* XXXRW: argument? */
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INP_LIST_LOCK_INIT(pcbinfo, "pcbinfolist");
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#ifdef VIMAGE
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pcbinfo->ipi_vnet = curvnet;
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#endif
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pcbinfo->ipi_listhead = listhead;
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LIST_INIT(pcbinfo->ipi_listhead);
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pcbinfo->ipi_count = 0;
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pcbinfo->ipi_hashbase = hashinit(hash_nelements, M_PCB,
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&pcbinfo->ipi_hashmask);
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pcbinfo->ipi_porthashbase = hashinit(porthash_nelements, M_PCB,
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&pcbinfo->ipi_porthashmask);
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#ifdef PCBGROUP
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in_pcbgroup_init(pcbinfo, hashfields, hash_nelements);
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#endif
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pcbinfo->ipi_zone = uma_zcreate(inpcbzone_name, sizeof(struct inpcb),
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NULL, NULL, inpcbzone_init, inpcbzone_fini, UMA_ALIGN_PTR,
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inpcbzone_flags);
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uma_zone_set_max(pcbinfo->ipi_zone, maxsockets);
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uma_zone_set_warning(pcbinfo->ipi_zone,
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"kern.ipc.maxsockets limit reached");
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}
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/*
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* Destroy an inpcbinfo.
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*/
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void
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in_pcbinfo_destroy(struct inpcbinfo *pcbinfo)
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{
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KASSERT(pcbinfo->ipi_count == 0,
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("%s: ipi_count = %u", __func__, pcbinfo->ipi_count));
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hashdestroy(pcbinfo->ipi_hashbase, M_PCB, pcbinfo->ipi_hashmask);
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hashdestroy(pcbinfo->ipi_porthashbase, M_PCB,
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pcbinfo->ipi_porthashmask);
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#ifdef PCBGROUP
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in_pcbgroup_destroy(pcbinfo);
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#endif
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uma_zdestroy(pcbinfo->ipi_zone);
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INP_LIST_LOCK_DESTROY(pcbinfo);
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INP_HASH_LOCK_DESTROY(pcbinfo);
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INP_INFO_LOCK_DESTROY(pcbinfo);
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}
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/*
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* Allocate a PCB and associate it with the socket.
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* On success return with the PCB locked.
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*/
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int
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in_pcballoc(struct socket *so, struct inpcbinfo *pcbinfo)
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{
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struct inpcb *inp;
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int error;
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#ifdef INVARIANTS
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if (pcbinfo == &V_tcbinfo) {
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INP_INFO_RLOCK_ASSERT(pcbinfo);
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} else {
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INP_INFO_WLOCK_ASSERT(pcbinfo);
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}
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#endif
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error = 0;
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inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT);
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if (inp == NULL)
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return (ENOBUFS);
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bzero(inp, inp_zero_size);
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inp->inp_pcbinfo = pcbinfo;
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inp->inp_socket = so;
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inp->inp_cred = crhold(so->so_cred);
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inp->inp_inc.inc_fibnum = so->so_fibnum;
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#ifdef MAC
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error = mac_inpcb_init(inp, M_NOWAIT);
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if (error != 0)
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goto out;
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mac_inpcb_create(so, inp);
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#endif
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#if defined(IPSEC) || defined(IPSEC_SUPPORT)
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error = ipsec_init_pcbpolicy(inp);
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if (error != 0) {
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#ifdef MAC
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mac_inpcb_destroy(inp);
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#endif
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goto out;
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}
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#endif /*IPSEC*/
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#ifdef INET6
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if (INP_SOCKAF(so) == AF_INET6) {
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inp->inp_vflag |= INP_IPV6PROTO;
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if (V_ip6_v6only)
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inp->inp_flags |= IN6P_IPV6_V6ONLY;
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}
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#endif
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INP_WLOCK(inp);
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INP_LIST_WLOCK(pcbinfo);
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LIST_INSERT_HEAD(pcbinfo->ipi_listhead, inp, inp_list);
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pcbinfo->ipi_count++;
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so->so_pcb = (caddr_t)inp;
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#ifdef INET6
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if (V_ip6_auto_flowlabel)
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inp->inp_flags |= IN6P_AUTOFLOWLABEL;
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#endif
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inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
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refcount_init(&inp->inp_refcount, 1); /* Reference from inpcbinfo */
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INP_LIST_WUNLOCK(pcbinfo);
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#if defined(IPSEC) || defined(IPSEC_SUPPORT) || defined(MAC)
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out:
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if (error != 0) {
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crfree(inp->inp_cred);
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uma_zfree(pcbinfo->ipi_zone, inp);
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}
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#endif
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return (error);
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}
|
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|
|
#ifdef INET
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int
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in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
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|
{
|
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int anonport, error;
|
|
|
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INP_WLOCK_ASSERT(inp);
|
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INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
|
|
|
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if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
|
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return (EINVAL);
|
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anonport = nam == NULL || ((struct sockaddr_in *)nam)->sin_port == 0;
|
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error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr,
|
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&inp->inp_lport, cred);
|
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if (error)
|
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return (error);
|
|
if (in_pcbinshash(inp) != 0) {
|
|
inp->inp_laddr.s_addr = INADDR_ANY;
|
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inp->inp_lport = 0;
|
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return (EAGAIN);
|
|
}
|
|
if (anonport)
|
|
inp->inp_flags |= INP_ANONPORT;
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Select a local port (number) to use.
|
|
*/
|
|
#if defined(INET) || defined(INET6)
|
|
int
|
|
in_pcb_lport(struct inpcb *inp, struct in_addr *laddrp, u_short *lportp,
|
|
struct ucred *cred, int lookupflags)
|
|
{
|
|
struct inpcbinfo *pcbinfo;
|
|
struct inpcb *tmpinp;
|
|
unsigned short *lastport;
|
|
int count, dorandom, error;
|
|
u_short aux, first, last, lport;
|
|
#ifdef INET
|
|
struct in_addr laddr;
|
|
#endif
|
|
|
|
pcbinfo = inp->inp_pcbinfo;
|
|
|
|
/*
|
|
* Because no actual state changes occur here, a global write lock on
|
|
* the pcbinfo isn't required.
|
|
*/
|
|
INP_LOCK_ASSERT(inp);
|
|
INP_HASH_LOCK_ASSERT(pcbinfo);
|
|
|
|
if (inp->inp_flags & INP_HIGHPORT) {
|
|
first = V_ipport_hifirstauto; /* sysctl */
|
|
last = V_ipport_hilastauto;
|
|
lastport = &pcbinfo->ipi_lasthi;
|
|
} else if (inp->inp_flags & INP_LOWPORT) {
|
|
error = priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 0);
|
|
if (error)
|
|
return (error);
|
|
first = V_ipport_lowfirstauto; /* 1023 */
|
|
last = V_ipport_lowlastauto; /* 600 */
|
|
lastport = &pcbinfo->ipi_lastlow;
|
|
} else {
|
|
first = V_ipport_firstauto; /* sysctl */
|
|
last = V_ipport_lastauto;
|
|
lastport = &pcbinfo->ipi_lastport;
|
|
}
|
|
/*
|
|
* For UDP(-Lite), use random port allocation as long as the user
|
|
* allows it. For TCP (and as of yet unknown) connections,
|
|
* use random port allocation only if the user allows it AND
|
|
* ipport_tick() allows it.
|
|
*/
|
|
if (V_ipport_randomized &&
|
|
(!V_ipport_stoprandom || pcbinfo == &V_udbinfo ||
|
|
pcbinfo == &V_ulitecbinfo))
|
|
dorandom = 1;
|
|
else
|
|
dorandom = 0;
|
|
/*
|
|
* It makes no sense to do random port allocation if
|
|
* we have the only port available.
|
|
*/
|
|
if (first == last)
|
|
dorandom = 0;
|
|
/* Make sure to not include UDP(-Lite) packets in the count. */
|
|
if (pcbinfo != &V_udbinfo || pcbinfo != &V_ulitecbinfo)
|
|
V_ipport_tcpallocs++;
|
|
/*
|
|
* Instead of having two loops further down counting up or down
|
|
* make sure that first is always <= last and go with only one
|
|
* code path implementing all logic.
|
|
*/
|
|
if (first > last) {
|
|
aux = first;
|
|
first = last;
|
|
last = aux;
|
|
}
|
|
|
|
#ifdef INET
|
|
/* Make the compiler happy. */
|
|
laddr.s_addr = 0;
|
|
if ((inp->inp_vflag & (INP_IPV4|INP_IPV6)) == INP_IPV4) {
|
|
KASSERT(laddrp != NULL, ("%s: laddrp NULL for v4 inp %p",
|
|
__func__, inp));
|
|
laddr = *laddrp;
|
|
}
|
|
#endif
|
|
tmpinp = NULL; /* Make compiler happy. */
|
|
lport = *lportp;
|
|
|
|
if (dorandom)
|
|
*lastport = first + (arc4random() % (last - first));
|
|
|
|
count = last - first;
|
|
|
|
do {
|
|
if (count-- < 0) /* completely used? */
|
|
return (EADDRNOTAVAIL);
|
|
++*lastport;
|
|
if (*lastport < first || *lastport > last)
|
|
*lastport = first;
|
|
lport = htons(*lastport);
|
|
|
|
#ifdef INET6
|
|
if ((inp->inp_vflag & INP_IPV6) != 0)
|
|
tmpinp = in6_pcblookup_local(pcbinfo,
|
|
&inp->in6p_laddr, lport, lookupflags, cred);
|
|
#endif
|
|
#if defined(INET) && defined(INET6)
|
|
else
|
|
#endif
|
|
#ifdef INET
|
|
tmpinp = in_pcblookup_local(pcbinfo, laddr,
|
|
lport, lookupflags, cred);
|
|
#endif
|
|
} while (tmpinp != NULL);
|
|
|
|
#ifdef INET
|
|
if ((inp->inp_vflag & (INP_IPV4|INP_IPV6)) == INP_IPV4)
|
|
laddrp->s_addr = laddr.s_addr;
|
|
#endif
|
|
*lportp = lport;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return cached socket options.
|
|
*/
|
|
short
|
|
inp_so_options(const struct inpcb *inp)
|
|
{
|
|
short so_options;
|
|
|
|
so_options = 0;
|
|
|
|
if ((inp->inp_flags2 & INP_REUSEPORT) != 0)
|
|
so_options |= SO_REUSEPORT;
|
|
if ((inp->inp_flags2 & INP_REUSEADDR) != 0)
|
|
so_options |= SO_REUSEADDR;
|
|
return (so_options);
|
|
}
|
|
#endif /* INET || INET6 */
|
|
|
|
/*
|
|
* Check if a new BINDMULTI socket is allowed to be created.
|
|
*
|
|
* ni points to the new inp.
|
|
* oi points to the exisitng inp.
|
|
*
|
|
* This checks whether the existing inp also has BINDMULTI and
|
|
* whether the credentials match.
|
|
*/
|
|
int
|
|
in_pcbbind_check_bindmulti(const struct inpcb *ni, const struct inpcb *oi)
|
|
{
|
|
/* Check permissions match */
|
|
if ((ni->inp_flags2 & INP_BINDMULTI) &&
|
|
(ni->inp_cred->cr_uid !=
|
|
oi->inp_cred->cr_uid))
|
|
return (0);
|
|
|
|
/* Check the existing inp has BINDMULTI set */
|
|
if ((ni->inp_flags2 & INP_BINDMULTI) &&
|
|
((oi->inp_flags2 & INP_BINDMULTI) == 0))
|
|
return (0);
|
|
|
|
/*
|
|
* We're okay - either INP_BINDMULTI isn't set on ni, or
|
|
* it is and it matches the checks.
|
|
*/
|
|
return (1);
|
|
}
|
|
|
|
#ifdef INET
|
|
/*
|
|
* Set up a bind operation on a PCB, performing port allocation
|
|
* as required, but do not actually modify the PCB. Callers can
|
|
* either complete the bind by setting inp_laddr/inp_lport and
|
|
* calling in_pcbinshash(), or they can just use the resulting
|
|
* port and address to authorise the sending of a once-off packet.
|
|
*
|
|
* On error, the values of *laddrp and *lportp are not changed.
|
|
*/
|
|
int
|
|
in_pcbbind_setup(struct inpcb *inp, struct sockaddr *nam, in_addr_t *laddrp,
|
|
u_short *lportp, struct ucred *cred)
|
|
{
|
|
struct socket *so = inp->inp_socket;
|
|
struct sockaddr_in *sin;
|
|
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
|
|
struct in_addr laddr;
|
|
u_short lport = 0;
|
|
int lookupflags = 0, reuseport = (so->so_options & SO_REUSEPORT);
|
|
int error;
|
|
|
|
/*
|
|
* No state changes, so read locks are sufficient here.
|
|
*/
|
|
INP_LOCK_ASSERT(inp);
|
|
INP_HASH_LOCK_ASSERT(pcbinfo);
|
|
|
|
if (TAILQ_EMPTY(&V_in_ifaddrhead)) /* XXX broken! */
|
|
return (EADDRNOTAVAIL);
|
|
laddr.s_addr = *laddrp;
|
|
if (nam != NULL && laddr.s_addr != INADDR_ANY)
|
|
return (EINVAL);
|
|
if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
|
|
lookupflags = INPLOOKUP_WILDCARD;
|
|
if (nam == NULL) {
|
|
if ((error = prison_local_ip4(cred, &laddr)) != 0)
|
|
return (error);
|
|
} else {
|
|
sin = (struct sockaddr_in *)nam;
|
|
if (nam->sa_len != sizeof (*sin))
|
|
return (EINVAL);
|
|
#ifdef notdef
|
|
/*
|
|
* We should check the family, but old programs
|
|
* incorrectly fail to initialize it.
|
|
*/
|
|
if (sin->sin_family != AF_INET)
|
|
return (EAFNOSUPPORT);
|
|
#endif
|
|
error = prison_local_ip4(cred, &sin->sin_addr);
|
|
if (error)
|
|
return (error);
|
|
if (sin->sin_port != *lportp) {
|
|
/* Don't allow the port to change. */
|
|
if (*lportp != 0)
|
|
return (EINVAL);
|
|
lport = sin->sin_port;
|
|
}
|
|
/* NB: lport is left as 0 if the port isn't being changed. */
|
|
if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
|
|
/*
|
|
* Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
|
|
* allow complete duplication of binding if
|
|
* SO_REUSEPORT is set, or if SO_REUSEADDR is set
|
|
* and a multicast address is bound on both
|
|
* new and duplicated sockets.
|
|
*/
|
|
if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0)
|
|
reuseport = SO_REUSEADDR|SO_REUSEPORT;
|
|
} else if (sin->sin_addr.s_addr != INADDR_ANY) {
|
|
sin->sin_port = 0; /* yech... */
|
|
bzero(&sin->sin_zero, sizeof(sin->sin_zero));
|
|
/*
|
|
* Is the address a local IP address?
|
|
* If INP_BINDANY is set, then the socket may be bound
|
|
* to any endpoint address, local or not.
|
|
*/
|
|
if ((inp->inp_flags & INP_BINDANY) == 0 &&
|
|
ifa_ifwithaddr_check((struct sockaddr *)sin) == 0)
|
|
return (EADDRNOTAVAIL);
|
|
}
|
|
laddr = sin->sin_addr;
|
|
if (lport) {
|
|
struct inpcb *t;
|
|
struct tcptw *tw;
|
|
|
|
/* GROSS */
|
|
if (ntohs(lport) <= V_ipport_reservedhigh &&
|
|
ntohs(lport) >= V_ipport_reservedlow &&
|
|
priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT,
|
|
0))
|
|
return (EACCES);
|
|
if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
|
|
priv_check_cred(inp->inp_cred,
|
|
PRIV_NETINET_REUSEPORT, 0) != 0) {
|
|
t = in_pcblookup_local(pcbinfo, sin->sin_addr,
|
|
lport, INPLOOKUP_WILDCARD, cred);
|
|
/*
|
|
* XXX
|
|
* This entire block sorely needs a rewrite.
|
|
*/
|
|
if (t &&
|
|
((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
|
|
((t->inp_flags & INP_TIMEWAIT) == 0) &&
|
|
(so->so_type != SOCK_STREAM ||
|
|
ntohl(t->inp_faddr.s_addr) == INADDR_ANY) &&
|
|
(ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
|
|
ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
|
|
(t->inp_flags2 & INP_REUSEPORT) == 0) &&
|
|
(inp->inp_cred->cr_uid !=
|
|
t->inp_cred->cr_uid))
|
|
return (EADDRINUSE);
|
|
|
|
/*
|
|
* If the socket is a BINDMULTI socket, then
|
|
* the credentials need to match and the
|
|
* original socket also has to have been bound
|
|
* with BINDMULTI.
|
|
*/
|
|
if (t && (! in_pcbbind_check_bindmulti(inp, t)))
|
|
return (EADDRINUSE);
|
|
}
|
|
t = in_pcblookup_local(pcbinfo, sin->sin_addr,
|
|
lport, lookupflags, cred);
|
|
if (t && (t->inp_flags & INP_TIMEWAIT)) {
|
|
/*
|
|
* XXXRW: If an incpb has had its timewait
|
|
* state recycled, we treat the address as
|
|
* being in use (for now). This is better
|
|
* than a panic, but not desirable.
|
|
*/
|
|
tw = intotw(t);
|
|
if (tw == NULL ||
|
|
(reuseport & tw->tw_so_options) == 0)
|
|
return (EADDRINUSE);
|
|
} else if (t &&
|
|
((inp->inp_flags2 & INP_BINDMULTI) == 0) &&
|
|
(reuseport & inp_so_options(t)) == 0) {
|
|
#ifdef INET6
|
|
if (ntohl(sin->sin_addr.s_addr) !=
|
|
INADDR_ANY ||
|
|
ntohl(t->inp_laddr.s_addr) !=
|
|
INADDR_ANY ||
|
|
(inp->inp_vflag & INP_IPV6PROTO) == 0 ||
|
|
(t->inp_vflag & INP_IPV6PROTO) == 0)
|
|
#endif
|
|
return (EADDRINUSE);
|
|
if (t && (! in_pcbbind_check_bindmulti(inp, t)))
|
|
return (EADDRINUSE);
|
|
}
|
|
}
|
|
}
|
|
if (*lportp != 0)
|
|
lport = *lportp;
|
|
if (lport == 0) {
|
|
error = in_pcb_lport(inp, &laddr, &lport, cred, lookupflags);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
}
|
|
*laddrp = laddr.s_addr;
|
|
*lportp = lport;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Connect from a socket to a specified address.
|
|
* Both address and port must be specified in argument sin.
|
|
* If don't have a local address for this socket yet,
|
|
* then pick one.
|
|
*/
|
|
int
|
|
in_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam,
|
|
struct ucred *cred, struct mbuf *m)
|
|
{
|
|
u_short lport, fport;
|
|
in_addr_t laddr, faddr;
|
|
int anonport, error;
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
|
|
|
|
lport = inp->inp_lport;
|
|
laddr = inp->inp_laddr.s_addr;
|
|
anonport = (lport == 0);
|
|
error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport,
|
|
NULL, cred);
|
|
if (error)
|
|
return (error);
|
|
|
|
/* Do the initial binding of the local address if required. */
|
|
if (inp->inp_laddr.s_addr == INADDR_ANY && inp->inp_lport == 0) {
|
|
inp->inp_lport = lport;
|
|
inp->inp_laddr.s_addr = laddr;
|
|
if (in_pcbinshash(inp) != 0) {
|
|
inp->inp_laddr.s_addr = INADDR_ANY;
|
|
inp->inp_lport = 0;
|
|
return (EAGAIN);
|
|
}
|
|
}
|
|
|
|
/* Commit the remaining changes. */
|
|
inp->inp_lport = lport;
|
|
inp->inp_laddr.s_addr = laddr;
|
|
inp->inp_faddr.s_addr = faddr;
|
|
inp->inp_fport = fport;
|
|
in_pcbrehash_mbuf(inp, m);
|
|
|
|
if (anonport)
|
|
inp->inp_flags |= INP_ANONPORT;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
in_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
|
|
{
|
|
|
|
return (in_pcbconnect_mbuf(inp, nam, cred, NULL));
|
|
}
|
|
|
|
/*
|
|
* Do proper source address selection on an unbound socket in case
|
|
* of connect. Take jails into account as well.
|
|
*/
|
|
int
|
|
in_pcbladdr(struct inpcb *inp, struct in_addr *faddr, struct in_addr *laddr,
|
|
struct ucred *cred)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct sockaddr *sa;
|
|
struct sockaddr_in *sin;
|
|
struct route sro;
|
|
int error;
|
|
|
|
KASSERT(laddr != NULL, ("%s: laddr NULL", __func__));
|
|
|
|
/*
|
|
* Bypass source address selection and use the primary jail IP
|
|
* if requested.
|
|
*/
|
|
if (cred != NULL && !prison_saddrsel_ip4(cred, laddr))
|
|
return (0);
|
|
|
|
error = 0;
|
|
bzero(&sro, sizeof(sro));
|
|
|
|
sin = (struct sockaddr_in *)&sro.ro_dst;
|
|
sin->sin_family = AF_INET;
|
|
sin->sin_len = sizeof(struct sockaddr_in);
|
|
sin->sin_addr.s_addr = faddr->s_addr;
|
|
|
|
/*
|
|
* If route is known our src addr is taken from the i/f,
|
|
* else punt.
|
|
*
|
|
* Find out route to destination.
|
|
*/
|
|
if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0)
|
|
in_rtalloc_ign(&sro, 0, inp->inp_inc.inc_fibnum);
|
|
|
|
/*
|
|
* If we found a route, use the address corresponding to
|
|
* the outgoing interface.
|
|
*
|
|
* Otherwise assume faddr is reachable on a directly connected
|
|
* network and try to find a corresponding interface to take
|
|
* the source address from.
|
|
*/
|
|
if (sro.ro_rt == NULL || sro.ro_rt->rt_ifp == NULL) {
|
|
struct in_ifaddr *ia;
|
|
struct ifnet *ifp;
|
|
|
|
ia = ifatoia(ifa_ifwithdstaddr((struct sockaddr *)sin,
|
|
inp->inp_socket->so_fibnum));
|
|
if (ia == NULL)
|
|
ia = ifatoia(ifa_ifwithnet((struct sockaddr *)sin, 0,
|
|
inp->inp_socket->so_fibnum));
|
|
if (ia == NULL) {
|
|
error = ENETUNREACH;
|
|
goto done;
|
|
}
|
|
|
|
if (cred == NULL || !prison_flag(cred, PR_IP4)) {
|
|
laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
|
|
ifa_free(&ia->ia_ifa);
|
|
goto done;
|
|
}
|
|
|
|
ifp = ia->ia_ifp;
|
|
ifa_free(&ia->ia_ifa);
|
|
ia = NULL;
|
|
IF_ADDR_RLOCK(ifp);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
|
|
sa = ifa->ifa_addr;
|
|
if (sa->sa_family != AF_INET)
|
|
continue;
|
|
sin = (struct sockaddr_in *)sa;
|
|
if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
|
|
ia = (struct in_ifaddr *)ifa;
|
|
break;
|
|
}
|
|
}
|
|
if (ia != NULL) {
|
|
laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
|
|
IF_ADDR_RUNLOCK(ifp);
|
|
goto done;
|
|
}
|
|
IF_ADDR_RUNLOCK(ifp);
|
|
|
|
/* 3. As a last resort return the 'default' jail address. */
|
|
error = prison_get_ip4(cred, laddr);
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* If the outgoing interface on the route found is not
|
|
* a loopback interface, use the address from that interface.
|
|
* In case of jails do those three steps:
|
|
* 1. check if the interface address belongs to the jail. If so use it.
|
|
* 2. check if we have any address on the outgoing interface
|
|
* belonging to this jail. If so use it.
|
|
* 3. as a last resort return the 'default' jail address.
|
|
*/
|
|
if ((sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) {
|
|
struct in_ifaddr *ia;
|
|
struct ifnet *ifp;
|
|
|
|
/* If not jailed, use the default returned. */
|
|
if (cred == NULL || !prison_flag(cred, PR_IP4)) {
|
|
ia = (struct in_ifaddr *)sro.ro_rt->rt_ifa;
|
|
laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
|
|
goto done;
|
|
}
|
|
|
|
/* Jailed. */
|
|
/* 1. Check if the iface address belongs to the jail. */
|
|
sin = (struct sockaddr_in *)sro.ro_rt->rt_ifa->ifa_addr;
|
|
if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
|
|
ia = (struct in_ifaddr *)sro.ro_rt->rt_ifa;
|
|
laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* 2. Check if we have any address on the outgoing interface
|
|
* belonging to this jail.
|
|
*/
|
|
ia = NULL;
|
|
ifp = sro.ro_rt->rt_ifp;
|
|
IF_ADDR_RLOCK(ifp);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
sa = ifa->ifa_addr;
|
|
if (sa->sa_family != AF_INET)
|
|
continue;
|
|
sin = (struct sockaddr_in *)sa;
|
|
if (prison_check_ip4(cred, &sin->sin_addr) == 0) {
|
|
ia = (struct in_ifaddr *)ifa;
|
|
break;
|
|
}
|
|
}
|
|
if (ia != NULL) {
|
|
laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
|
|
IF_ADDR_RUNLOCK(ifp);
|
|
goto done;
|
|
}
|
|
IF_ADDR_RUNLOCK(ifp);
|
|
|
|
/* 3. As a last resort return the 'default' jail address. */
|
|
error = prison_get_ip4(cred, laddr);
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* The outgoing interface is marked with 'loopback net', so a route
|
|
* to ourselves is here.
|
|
* Try to find the interface of the destination address and then
|
|
* take the address from there. That interface is not necessarily
|
|
* a loopback interface.
|
|
* In case of jails, check that it is an address of the jail
|
|
* and if we cannot find, fall back to the 'default' jail address.
|
|
*/
|
|
if ((sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) {
|
|
struct sockaddr_in sain;
|
|
struct in_ifaddr *ia;
|
|
|
|
bzero(&sain, sizeof(struct sockaddr_in));
|
|
sain.sin_family = AF_INET;
|
|
sain.sin_len = sizeof(struct sockaddr_in);
|
|
sain.sin_addr.s_addr = faddr->s_addr;
|
|
|
|
ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sain),
|
|
inp->inp_socket->so_fibnum));
|
|
if (ia == NULL)
|
|
ia = ifatoia(ifa_ifwithnet(sintosa(&sain), 0,
|
|
inp->inp_socket->so_fibnum));
|
|
if (ia == NULL)
|
|
ia = ifatoia(ifa_ifwithaddr(sintosa(&sain)));
|
|
|
|
if (cred == NULL || !prison_flag(cred, PR_IP4)) {
|
|
if (ia == NULL) {
|
|
error = ENETUNREACH;
|
|
goto done;
|
|
}
|
|
laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
|
|
ifa_free(&ia->ia_ifa);
|
|
goto done;
|
|
}
|
|
|
|
/* Jailed. */
|
|
if (ia != NULL) {
|
|
struct ifnet *ifp;
|
|
|
|
ifp = ia->ia_ifp;
|
|
ifa_free(&ia->ia_ifa);
|
|
ia = NULL;
|
|
IF_ADDR_RLOCK(ifp);
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
|
|
sa = ifa->ifa_addr;
|
|
if (sa->sa_family != AF_INET)
|
|
continue;
|
|
sin = (struct sockaddr_in *)sa;
|
|
if (prison_check_ip4(cred,
|
|
&sin->sin_addr) == 0) {
|
|
ia = (struct in_ifaddr *)ifa;
|
|
break;
|
|
}
|
|
}
|
|
if (ia != NULL) {
|
|
laddr->s_addr = ia->ia_addr.sin_addr.s_addr;
|
|
IF_ADDR_RUNLOCK(ifp);
|
|
goto done;
|
|
}
|
|
IF_ADDR_RUNLOCK(ifp);
|
|
}
|
|
|
|
/* 3. As a last resort return the 'default' jail address. */
|
|
error = prison_get_ip4(cred, laddr);
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
if (sro.ro_rt != NULL)
|
|
RTFREE(sro.ro_rt);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set up for a connect from a socket to the specified address.
|
|
* On entry, *laddrp and *lportp should contain the current local
|
|
* address and port for the PCB; these are updated to the values
|
|
* that should be placed in inp_laddr and inp_lport to complete
|
|
* the connect.
|
|
*
|
|
* On success, *faddrp and *fportp will be set to the remote address
|
|
* and port. These are not updated in the error case.
|
|
*
|
|
* If the operation fails because the connection already exists,
|
|
* *oinpp will be set to the PCB of that connection so that the
|
|
* caller can decide to override it. In all other cases, *oinpp
|
|
* is set to NULL.
|
|
*/
|
|
int
|
|
in_pcbconnect_setup(struct inpcb *inp, struct sockaddr *nam,
|
|
in_addr_t *laddrp, u_short *lportp, in_addr_t *faddrp, u_short *fportp,
|
|
struct inpcb **oinpp, struct ucred *cred)
|
|
{
|
|
struct rm_priotracker in_ifa_tracker;
|
|
struct sockaddr_in *sin = (struct sockaddr_in *)nam;
|
|
struct in_ifaddr *ia;
|
|
struct inpcb *oinp;
|
|
struct in_addr laddr, faddr;
|
|
u_short lport, fport;
|
|
int error;
|
|
|
|
/*
|
|
* Because a global state change doesn't actually occur here, a read
|
|
* lock is sufficient.
|
|
*/
|
|
INP_LOCK_ASSERT(inp);
|
|
INP_HASH_LOCK_ASSERT(inp->inp_pcbinfo);
|
|
|
|
if (oinpp != NULL)
|
|
*oinpp = NULL;
|
|
if (nam->sa_len != sizeof (*sin))
|
|
return (EINVAL);
|
|
if (sin->sin_family != AF_INET)
|
|
return (EAFNOSUPPORT);
|
|
if (sin->sin_port == 0)
|
|
return (EADDRNOTAVAIL);
|
|
laddr.s_addr = *laddrp;
|
|
lport = *lportp;
|
|
faddr = sin->sin_addr;
|
|
fport = sin->sin_port;
|
|
|
|
if (!TAILQ_EMPTY(&V_in_ifaddrhead)) {
|
|
/*
|
|
* If the destination address is INADDR_ANY,
|
|
* use the primary local address.
|
|
* If the supplied address is INADDR_BROADCAST,
|
|
* and the primary interface supports broadcast,
|
|
* choose the broadcast address for that interface.
|
|
*/
|
|
if (faddr.s_addr == INADDR_ANY) {
|
|
IN_IFADDR_RLOCK(&in_ifa_tracker);
|
|
faddr =
|
|
IA_SIN(TAILQ_FIRST(&V_in_ifaddrhead))->sin_addr;
|
|
IN_IFADDR_RUNLOCK(&in_ifa_tracker);
|
|
if (cred != NULL &&
|
|
(error = prison_get_ip4(cred, &faddr)) != 0)
|
|
return (error);
|
|
} else if (faddr.s_addr == (u_long)INADDR_BROADCAST) {
|
|
IN_IFADDR_RLOCK(&in_ifa_tracker);
|
|
if (TAILQ_FIRST(&V_in_ifaddrhead)->ia_ifp->if_flags &
|
|
IFF_BROADCAST)
|
|
faddr = satosin(&TAILQ_FIRST(
|
|
&V_in_ifaddrhead)->ia_broadaddr)->sin_addr;
|
|
IN_IFADDR_RUNLOCK(&in_ifa_tracker);
|
|
}
|
|
}
|
|
if (laddr.s_addr == INADDR_ANY) {
|
|
error = in_pcbladdr(inp, &faddr, &laddr, cred);
|
|
/*
|
|
* If the destination address is multicast and an outgoing
|
|
* interface has been set as a multicast option, prefer the
|
|
* address of that interface as our source address.
|
|
*/
|
|
if (IN_MULTICAST(ntohl(faddr.s_addr)) &&
|
|
inp->inp_moptions != NULL) {
|
|
struct ip_moptions *imo;
|
|
struct ifnet *ifp;
|
|
|
|
imo = inp->inp_moptions;
|
|
if (imo->imo_multicast_ifp != NULL) {
|
|
ifp = imo->imo_multicast_ifp;
|
|
IN_IFADDR_RLOCK(&in_ifa_tracker);
|
|
TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
|
|
if ((ia->ia_ifp == ifp) &&
|
|
(cred == NULL ||
|
|
prison_check_ip4(cred,
|
|
&ia->ia_addr.sin_addr) == 0))
|
|
break;
|
|
}
|
|
if (ia == NULL)
|
|
error = EADDRNOTAVAIL;
|
|
else {
|
|
laddr = ia->ia_addr.sin_addr;
|
|
error = 0;
|
|
}
|
|
IN_IFADDR_RUNLOCK(&in_ifa_tracker);
|
|
}
|
|
}
|
|
if (error)
|
|
return (error);
|
|
}
|
|
oinp = in_pcblookup_hash_locked(inp->inp_pcbinfo, faddr, fport,
|
|
laddr, lport, 0, NULL);
|
|
if (oinp != NULL) {
|
|
if (oinpp != NULL)
|
|
*oinpp = oinp;
|
|
return (EADDRINUSE);
|
|
}
|
|
if (lport == 0) {
|
|
error = in_pcbbind_setup(inp, NULL, &laddr.s_addr, &lport,
|
|
cred);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
*laddrp = laddr.s_addr;
|
|
*lportp = lport;
|
|
*faddrp = faddr.s_addr;
|
|
*fportp = fport;
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
in_pcbdisconnect(struct inpcb *inp)
|
|
{
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo);
|
|
|
|
inp->inp_faddr.s_addr = INADDR_ANY;
|
|
inp->inp_fport = 0;
|
|
in_pcbrehash(inp);
|
|
}
|
|
#endif /* INET */
|
|
|
|
/*
|
|
* in_pcbdetach() is responsibe for disassociating a socket from an inpcb.
|
|
* For most protocols, this will be invoked immediately prior to calling
|
|
* in_pcbfree(). However, with TCP the inpcb may significantly outlive the
|
|
* socket, in which case in_pcbfree() is deferred.
|
|
*/
|
|
void
|
|
in_pcbdetach(struct inpcb *inp)
|
|
{
|
|
|
|
KASSERT(inp->inp_socket != NULL, ("%s: inp_socket == NULL", __func__));
|
|
|
|
#ifdef RATELIMIT
|
|
if (inp->inp_snd_tag != NULL)
|
|
in_pcbdetach_txrtlmt(inp);
|
|
#endif
|
|
inp->inp_socket->so_pcb = NULL;
|
|
inp->inp_socket = NULL;
|
|
}
|
|
|
|
/*
|
|
* in_pcbref() bumps the reference count on an inpcb in order to maintain
|
|
* stability of an inpcb pointer despite the inpcb lock being released. This
|
|
* is used in TCP when the inpcbinfo lock needs to be acquired or upgraded,
|
|
* but where the inpcb lock may already held, or when acquiring a reference
|
|
* via a pcbgroup.
|
|
*
|
|
* in_pcbref() should be used only to provide brief memory stability, and
|
|
* must always be followed by a call to INP_WLOCK() and in_pcbrele() to
|
|
* garbage collect the inpcb if it has been in_pcbfree()'d from another
|
|
* context. Until in_pcbrele() has returned that the inpcb is still valid,
|
|
* lock and rele are the *only* safe operations that may be performed on the
|
|
* inpcb.
|
|
*
|
|
* While the inpcb will not be freed, releasing the inpcb lock means that the
|
|
* connection's state may change, so the caller should be careful to
|
|
* revalidate any cached state on reacquiring the lock. Drop the reference
|
|
* using in_pcbrele().
|
|
*/
|
|
void
|
|
in_pcbref(struct inpcb *inp)
|
|
{
|
|
|
|
KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
|
|
|
|
refcount_acquire(&inp->inp_refcount);
|
|
}
|
|
|
|
/*
|
|
* Drop a refcount on an inpcb elevated using in_pcbref(); because a call to
|
|
* in_pcbfree() may have been made between in_pcbref() and in_pcbrele(), we
|
|
* return a flag indicating whether or not the inpcb remains valid. If it is
|
|
* valid, we return with the inpcb lock held.
|
|
*
|
|
* Notice that, unlike in_pcbref(), the inpcb lock must be held to drop a
|
|
* reference on an inpcb. Historically more work was done here (actually, in
|
|
* in_pcbfree_internal()) but has been moved to in_pcbfree() to avoid the
|
|
* need for the pcbinfo lock in in_pcbrele(). Deferring the free is entirely
|
|
* about memory stability (and continued use of the write lock).
|
|
*/
|
|
int
|
|
in_pcbrele_rlocked(struct inpcb *inp)
|
|
{
|
|
struct inpcbinfo *pcbinfo;
|
|
|
|
KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
|
|
|
|
INP_RLOCK_ASSERT(inp);
|
|
|
|
if (refcount_release(&inp->inp_refcount) == 0) {
|
|
/*
|
|
* If the inpcb has been freed, let the caller know, even if
|
|
* this isn't the last reference.
|
|
*/
|
|
if (inp->inp_flags2 & INP_FREED) {
|
|
INP_RUNLOCK(inp);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
|
|
|
|
INP_RUNLOCK(inp);
|
|
pcbinfo = inp->inp_pcbinfo;
|
|
uma_zfree(pcbinfo->ipi_zone, inp);
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
in_pcbrele_wlocked(struct inpcb *inp)
|
|
{
|
|
struct inpcbinfo *pcbinfo;
|
|
|
|
KASSERT(inp->inp_refcount > 0, ("%s: refcount 0", __func__));
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
|
|
if (refcount_release(&inp->inp_refcount) == 0) {
|
|
/*
|
|
* If the inpcb has been freed, let the caller know, even if
|
|
* this isn't the last reference.
|
|
*/
|
|
if (inp->inp_flags2 & INP_FREED) {
|
|
INP_WUNLOCK(inp);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
|
|
|
|
INP_WUNLOCK(inp);
|
|
pcbinfo = inp->inp_pcbinfo;
|
|
uma_zfree(pcbinfo->ipi_zone, inp);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Temporary wrapper.
|
|
*/
|
|
int
|
|
in_pcbrele(struct inpcb *inp)
|
|
{
|
|
|
|
return (in_pcbrele_wlocked(inp));
|
|
}
|
|
|
|
/*
|
|
* Unconditionally schedule an inpcb to be freed by decrementing its
|
|
* reference count, which should occur only after the inpcb has been detached
|
|
* from its socket. If another thread holds a temporary reference (acquired
|
|
* using in_pcbref()) then the free is deferred until that reference is
|
|
* released using in_pcbrele(), but the inpcb is still unlocked. Almost all
|
|
* work, including removal from global lists, is done in this context, where
|
|
* the pcbinfo lock is held.
|
|
*/
|
|
void
|
|
in_pcbfree(struct inpcb *inp)
|
|
{
|
|
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
|
|
|
|
KASSERT(inp->inp_socket == NULL, ("%s: inp_socket != NULL", __func__));
|
|
|
|
#ifdef INVARIANTS
|
|
if (pcbinfo == &V_tcbinfo) {
|
|
INP_INFO_LOCK_ASSERT(pcbinfo);
|
|
} else {
|
|
INP_INFO_WLOCK_ASSERT(pcbinfo);
|
|
}
|
|
#endif
|
|
INP_WLOCK_ASSERT(inp);
|
|
|
|
/* XXXRW: Do as much as possible here. */
|
|
#if defined(IPSEC) || defined(IPSEC_SUPPORT)
|
|
if (inp->inp_sp != NULL)
|
|
ipsec_delete_pcbpolicy(inp);
|
|
#endif
|
|
INP_LIST_WLOCK(pcbinfo);
|
|
inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
|
|
in_pcbremlists(inp);
|
|
INP_LIST_WUNLOCK(pcbinfo);
|
|
#ifdef INET6
|
|
if (inp->inp_vflag & INP_IPV6PROTO) {
|
|
ip6_freepcbopts(inp->in6p_outputopts);
|
|
if (inp->in6p_moptions != NULL)
|
|
ip6_freemoptions(inp->in6p_moptions);
|
|
}
|
|
#endif
|
|
if (inp->inp_options)
|
|
(void)m_free(inp->inp_options);
|
|
#ifdef INET
|
|
if (inp->inp_moptions != NULL)
|
|
inp_freemoptions(inp->inp_moptions);
|
|
#endif
|
|
RO_RTFREE(&inp->inp_route);
|
|
if (inp->inp_route.ro_lle)
|
|
LLE_FREE(inp->inp_route.ro_lle); /* zeros ro_lle */
|
|
|
|
inp->inp_vflag = 0;
|
|
inp->inp_flags2 |= INP_FREED;
|
|
crfree(inp->inp_cred);
|
|
#ifdef MAC
|
|
mac_inpcb_destroy(inp);
|
|
#endif
|
|
if (!in_pcbrele_wlocked(inp))
|
|
INP_WUNLOCK(inp);
|
|
}
|
|
|
|
/*
|
|
* in_pcbdrop() removes an inpcb from hashed lists, releasing its address and
|
|
* port reservation, and preventing it from being returned by inpcb lookups.
|
|
*
|
|
* It is used by TCP to mark an inpcb as unused and avoid future packet
|
|
* delivery or event notification when a socket remains open but TCP has
|
|
* closed. This might occur as a result of a shutdown()-initiated TCP close
|
|
* or a RST on the wire, and allows the port binding to be reused while still
|
|
* maintaining the invariant that so_pcb always points to a valid inpcb until
|
|
* in_pcbdetach().
|
|
*
|
|
* XXXRW: Possibly in_pcbdrop() should also prevent future notifications by
|
|
* in_pcbnotifyall() and in_pcbpurgeif0()?
|
|
*/
|
|
void
|
|
in_pcbdrop(struct inpcb *inp)
|
|
{
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
|
|
/*
|
|
* XXXRW: Possibly we should protect the setting of INP_DROPPED with
|
|
* the hash lock...?
|
|
*/
|
|
inp->inp_flags |= INP_DROPPED;
|
|
if (inp->inp_flags & INP_INHASHLIST) {
|
|
struct inpcbport *phd = inp->inp_phd;
|
|
|
|
INP_HASH_WLOCK(inp->inp_pcbinfo);
|
|
LIST_REMOVE(inp, inp_hash);
|
|
LIST_REMOVE(inp, inp_portlist);
|
|
if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
|
|
LIST_REMOVE(phd, phd_hash);
|
|
free(phd, M_PCB);
|
|
}
|
|
INP_HASH_WUNLOCK(inp->inp_pcbinfo);
|
|
inp->inp_flags &= ~INP_INHASHLIST;
|
|
#ifdef PCBGROUP
|
|
in_pcbgroup_remove(inp);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#ifdef INET
|
|
/*
|
|
* Common routines to return the socket addresses associated with inpcbs.
|
|
*/
|
|
struct sockaddr *
|
|
in_sockaddr(in_port_t port, struct in_addr *addr_p)
|
|
{
|
|
struct sockaddr_in *sin;
|
|
|
|
sin = malloc(sizeof *sin, M_SONAME,
|
|
M_WAITOK | M_ZERO);
|
|
sin->sin_family = AF_INET;
|
|
sin->sin_len = sizeof(*sin);
|
|
sin->sin_addr = *addr_p;
|
|
sin->sin_port = port;
|
|
|
|
return (struct sockaddr *)sin;
|
|
}
|
|
|
|
int
|
|
in_getsockaddr(struct socket *so, struct sockaddr **nam)
|
|
{
|
|
struct inpcb *inp;
|
|
struct in_addr addr;
|
|
in_port_t port;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("in_getsockaddr: inp == NULL"));
|
|
|
|
INP_RLOCK(inp);
|
|
port = inp->inp_lport;
|
|
addr = inp->inp_laddr;
|
|
INP_RUNLOCK(inp);
|
|
|
|
*nam = in_sockaddr(port, &addr);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
in_getpeeraddr(struct socket *so, struct sockaddr **nam)
|
|
{
|
|
struct inpcb *inp;
|
|
struct in_addr addr;
|
|
in_port_t port;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("in_getpeeraddr: inp == NULL"));
|
|
|
|
INP_RLOCK(inp);
|
|
port = inp->inp_fport;
|
|
addr = inp->inp_faddr;
|
|
INP_RUNLOCK(inp);
|
|
|
|
*nam = in_sockaddr(port, &addr);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
in_pcbnotifyall(struct inpcbinfo *pcbinfo, struct in_addr faddr, int errno,
|
|
struct inpcb *(*notify)(struct inpcb *, int))
|
|
{
|
|
struct inpcb *inp, *inp_temp;
|
|
|
|
INP_INFO_WLOCK(pcbinfo);
|
|
LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) {
|
|
INP_WLOCK(inp);
|
|
#ifdef INET6
|
|
if ((inp->inp_vflag & INP_IPV4) == 0) {
|
|
INP_WUNLOCK(inp);
|
|
continue;
|
|
}
|
|
#endif
|
|
if (inp->inp_faddr.s_addr != faddr.s_addr ||
|
|
inp->inp_socket == NULL) {
|
|
INP_WUNLOCK(inp);
|
|
continue;
|
|
}
|
|
if ((*notify)(inp, errno))
|
|
INP_WUNLOCK(inp);
|
|
}
|
|
INP_INFO_WUNLOCK(pcbinfo);
|
|
}
|
|
|
|
void
|
|
in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
|
|
{
|
|
struct inpcb *inp;
|
|
struct ip_moptions *imo;
|
|
int i, gap;
|
|
|
|
INP_INFO_WLOCK(pcbinfo);
|
|
LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) {
|
|
INP_WLOCK(inp);
|
|
imo = inp->inp_moptions;
|
|
if ((inp->inp_vflag & INP_IPV4) &&
|
|
imo != NULL) {
|
|
/*
|
|
* Unselect the outgoing interface if it is being
|
|
* detached.
|
|
*/
|
|
if (imo->imo_multicast_ifp == ifp)
|
|
imo->imo_multicast_ifp = NULL;
|
|
|
|
/*
|
|
* Drop multicast group membership if we joined
|
|
* through the interface being detached.
|
|
*/
|
|
for (i = 0, gap = 0; i < imo->imo_num_memberships;
|
|
i++) {
|
|
if (imo->imo_membership[i]->inm_ifp == ifp) {
|
|
in_delmulti(imo->imo_membership[i]);
|
|
gap++;
|
|
} else if (gap != 0)
|
|
imo->imo_membership[i - gap] =
|
|
imo->imo_membership[i];
|
|
}
|
|
imo->imo_num_memberships -= gap;
|
|
}
|
|
INP_WUNLOCK(inp);
|
|
}
|
|
INP_INFO_WUNLOCK(pcbinfo);
|
|
}
|
|
|
|
/*
|
|
* Lookup a PCB based on the local address and port. Caller must hold the
|
|
* hash lock. No inpcb locks or references are acquired.
|
|
*/
|
|
#define INP_LOOKUP_MAPPED_PCB_COST 3
|
|
struct inpcb *
|
|
in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
|
|
u_short lport, int lookupflags, struct ucred *cred)
|
|
{
|
|
struct inpcb *inp;
|
|
#ifdef INET6
|
|
int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST;
|
|
#else
|
|
int matchwild = 3;
|
|
#endif
|
|
int wildcard;
|
|
|
|
KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
|
|
("%s: invalid lookup flags %d", __func__, lookupflags));
|
|
|
|
INP_HASH_LOCK_ASSERT(pcbinfo);
|
|
|
|
if ((lookupflags & INPLOOKUP_WILDCARD) == 0) {
|
|
struct inpcbhead *head;
|
|
/*
|
|
* Look for an unconnected (wildcard foreign addr) PCB that
|
|
* matches the local address and port we're looking for.
|
|
*/
|
|
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
|
|
0, pcbinfo->ipi_hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
#ifdef INET6
|
|
/* XXX inp locking */
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
|
continue;
|
|
#endif
|
|
if (inp->inp_faddr.s_addr == INADDR_ANY &&
|
|
inp->inp_laddr.s_addr == laddr.s_addr &&
|
|
inp->inp_lport == lport) {
|
|
/*
|
|
* Found?
|
|
*/
|
|
if (cred == NULL ||
|
|
prison_equal_ip4(cred->cr_prison,
|
|
inp->inp_cred->cr_prison))
|
|
return (inp);
|
|
}
|
|
}
|
|
/*
|
|
* Not found.
|
|
*/
|
|
return (NULL);
|
|
} else {
|
|
struct inpcbporthead *porthash;
|
|
struct inpcbport *phd;
|
|
struct inpcb *match = NULL;
|
|
/*
|
|
* Best fit PCB lookup.
|
|
*
|
|
* First see if this local port is in use by looking on the
|
|
* port hash list.
|
|
*/
|
|
porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport,
|
|
pcbinfo->ipi_porthashmask)];
|
|
LIST_FOREACH(phd, porthash, phd_hash) {
|
|
if (phd->phd_port == lport)
|
|
break;
|
|
}
|
|
if (phd != NULL) {
|
|
/*
|
|
* Port is in use by one or more PCBs. Look for best
|
|
* fit.
|
|
*/
|
|
LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) {
|
|
wildcard = 0;
|
|
if (cred != NULL &&
|
|
!prison_equal_ip4(inp->inp_cred->cr_prison,
|
|
cred->cr_prison))
|
|
continue;
|
|
#ifdef INET6
|
|
/* XXX inp locking */
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
|
continue;
|
|
/*
|
|
* We never select the PCB that has
|
|
* INP_IPV6 flag and is bound to :: if
|
|
* we have another PCB which is bound
|
|
* to 0.0.0.0. If a PCB has the
|
|
* INP_IPV6 flag, then we set its cost
|
|
* higher than IPv4 only PCBs.
|
|
*
|
|
* Note that the case only happens
|
|
* when a socket is bound to ::, under
|
|
* the condition that the use of the
|
|
* mapped address is allowed.
|
|
*/
|
|
if ((inp->inp_vflag & INP_IPV6) != 0)
|
|
wildcard += INP_LOOKUP_MAPPED_PCB_COST;
|
|
#endif
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY)
|
|
wildcard++;
|
|
if (inp->inp_laddr.s_addr != INADDR_ANY) {
|
|
if (laddr.s_addr == INADDR_ANY)
|
|
wildcard++;
|
|
else if (inp->inp_laddr.s_addr != laddr.s_addr)
|
|
continue;
|
|
} else {
|
|
if (laddr.s_addr != INADDR_ANY)
|
|
wildcard++;
|
|
}
|
|
if (wildcard < matchwild) {
|
|
match = inp;
|
|
matchwild = wildcard;
|
|
if (matchwild == 0)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return (match);
|
|
}
|
|
}
|
|
#undef INP_LOOKUP_MAPPED_PCB_COST
|
|
|
|
#ifdef PCBGROUP
|
|
/*
|
|
* Lookup PCB in hash list, using pcbgroup tables.
|
|
*/
|
|
static struct inpcb *
|
|
in_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup,
|
|
struct in_addr faddr, u_int fport_arg, struct in_addr laddr,
|
|
u_int lport_arg, int lookupflags, struct ifnet *ifp)
|
|
{
|
|
struct inpcbhead *head;
|
|
struct inpcb *inp, *tmpinp;
|
|
u_short fport = fport_arg, lport = lport_arg;
|
|
|
|
/*
|
|
* First look for an exact match.
|
|
*/
|
|
tmpinp = NULL;
|
|
INP_GROUP_LOCK(pcbgroup);
|
|
head = &pcbgroup->ipg_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
|
|
pcbgroup->ipg_hashmask)];
|
|
LIST_FOREACH(inp, head, inp_pcbgrouphash) {
|
|
#ifdef INET6
|
|
/* XXX inp locking */
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
|
continue;
|
|
#endif
|
|
if (inp->inp_faddr.s_addr == faddr.s_addr &&
|
|
inp->inp_laddr.s_addr == laddr.s_addr &&
|
|
inp->inp_fport == fport &&
|
|
inp->inp_lport == lport) {
|
|
/*
|
|
* XXX We should be able to directly return
|
|
* the inp here, without any checks.
|
|
* Well unless both bound with SO_REUSEPORT?
|
|
*/
|
|
if (prison_flag(inp->inp_cred, PR_IP4))
|
|
goto found;
|
|
if (tmpinp == NULL)
|
|
tmpinp = inp;
|
|
}
|
|
}
|
|
if (tmpinp != NULL) {
|
|
inp = tmpinp;
|
|
goto found;
|
|
}
|
|
|
|
#ifdef RSS
|
|
/*
|
|
* For incoming connections, we may wish to do a wildcard
|
|
* match for an RSS-local socket.
|
|
*/
|
|
if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
|
|
struct inpcb *local_wild = NULL, *local_exact = NULL;
|
|
#ifdef INET6
|
|
struct inpcb *local_wild_mapped = NULL;
|
|
#endif
|
|
struct inpcb *jail_wild = NULL;
|
|
struct inpcbhead *head;
|
|
int injail;
|
|
|
|
/*
|
|
* Order of socket selection - we always prefer jails.
|
|
* 1. jailed, non-wild.
|
|
* 2. jailed, wild.
|
|
* 3. non-jailed, non-wild.
|
|
* 4. non-jailed, wild.
|
|
*/
|
|
|
|
head = &pcbgroup->ipg_hashbase[INP_PCBHASH(INADDR_ANY,
|
|
lport, 0, pcbgroup->ipg_hashmask)];
|
|
LIST_FOREACH(inp, head, inp_pcbgrouphash) {
|
|
#ifdef INET6
|
|
/* XXX inp locking */
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
|
continue;
|
|
#endif
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY ||
|
|
inp->inp_lport != lport)
|
|
continue;
|
|
|
|
injail = prison_flag(inp->inp_cred, PR_IP4);
|
|
if (injail) {
|
|
if (prison_check_ip4(inp->inp_cred,
|
|
&laddr) != 0)
|
|
continue;
|
|
} else {
|
|
if (local_exact != NULL)
|
|
continue;
|
|
}
|
|
|
|
if (inp->inp_laddr.s_addr == laddr.s_addr) {
|
|
if (injail)
|
|
goto found;
|
|
else
|
|
local_exact = inp;
|
|
} else if (inp->inp_laddr.s_addr == INADDR_ANY) {
|
|
#ifdef INET6
|
|
/* XXX inp locking, NULL check */
|
|
if (inp->inp_vflag & INP_IPV6PROTO)
|
|
local_wild_mapped = inp;
|
|
else
|
|
#endif
|
|
if (injail)
|
|
jail_wild = inp;
|
|
else
|
|
local_wild = inp;
|
|
}
|
|
} /* LIST_FOREACH */
|
|
|
|
inp = jail_wild;
|
|
if (inp == NULL)
|
|
inp = local_exact;
|
|
if (inp == NULL)
|
|
inp = local_wild;
|
|
#ifdef INET6
|
|
if (inp == NULL)
|
|
inp = local_wild_mapped;
|
|
#endif
|
|
if (inp != NULL)
|
|
goto found;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Then look for a wildcard match, if requested.
|
|
*/
|
|
if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
|
|
struct inpcb *local_wild = NULL, *local_exact = NULL;
|
|
#ifdef INET6
|
|
struct inpcb *local_wild_mapped = NULL;
|
|
#endif
|
|
struct inpcb *jail_wild = NULL;
|
|
struct inpcbhead *head;
|
|
int injail;
|
|
|
|
/*
|
|
* Order of socket selection - we always prefer jails.
|
|
* 1. jailed, non-wild.
|
|
* 2. jailed, wild.
|
|
* 3. non-jailed, non-wild.
|
|
* 4. non-jailed, wild.
|
|
*/
|
|
head = &pcbinfo->ipi_wildbase[INP_PCBHASH(INADDR_ANY, lport,
|
|
0, pcbinfo->ipi_wildmask)];
|
|
LIST_FOREACH(inp, head, inp_pcbgroup_wild) {
|
|
#ifdef INET6
|
|
/* XXX inp locking */
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
|
continue;
|
|
#endif
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY ||
|
|
inp->inp_lport != lport)
|
|
continue;
|
|
|
|
injail = prison_flag(inp->inp_cred, PR_IP4);
|
|
if (injail) {
|
|
if (prison_check_ip4(inp->inp_cred,
|
|
&laddr) != 0)
|
|
continue;
|
|
} else {
|
|
if (local_exact != NULL)
|
|
continue;
|
|
}
|
|
|
|
if (inp->inp_laddr.s_addr == laddr.s_addr) {
|
|
if (injail)
|
|
goto found;
|
|
else
|
|
local_exact = inp;
|
|
} else if (inp->inp_laddr.s_addr == INADDR_ANY) {
|
|
#ifdef INET6
|
|
/* XXX inp locking, NULL check */
|
|
if (inp->inp_vflag & INP_IPV6PROTO)
|
|
local_wild_mapped = inp;
|
|
else
|
|
#endif
|
|
if (injail)
|
|
jail_wild = inp;
|
|
else
|
|
local_wild = inp;
|
|
}
|
|
} /* LIST_FOREACH */
|
|
inp = jail_wild;
|
|
if (inp == NULL)
|
|
inp = local_exact;
|
|
if (inp == NULL)
|
|
inp = local_wild;
|
|
#ifdef INET6
|
|
if (inp == NULL)
|
|
inp = local_wild_mapped;
|
|
#endif
|
|
if (inp != NULL)
|
|
goto found;
|
|
} /* if (lookupflags & INPLOOKUP_WILDCARD) */
|
|
INP_GROUP_UNLOCK(pcbgroup);
|
|
return (NULL);
|
|
|
|
found:
|
|
in_pcbref(inp);
|
|
INP_GROUP_UNLOCK(pcbgroup);
|
|
if (lookupflags & INPLOOKUP_WLOCKPCB) {
|
|
INP_WLOCK(inp);
|
|
if (in_pcbrele_wlocked(inp))
|
|
return (NULL);
|
|
} else if (lookupflags & INPLOOKUP_RLOCKPCB) {
|
|
INP_RLOCK(inp);
|
|
if (in_pcbrele_rlocked(inp))
|
|
return (NULL);
|
|
} else
|
|
panic("%s: locking bug", __func__);
|
|
return (inp);
|
|
}
|
|
#endif /* PCBGROUP */
|
|
|
|
/*
|
|
* Lookup PCB in hash list, using pcbinfo tables. This variation assumes
|
|
* that the caller has locked the hash list, and will not perform any further
|
|
* locking or reference operations on either the hash list or the connection.
|
|
*/
|
|
static struct inpcb *
|
|
in_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in_addr faddr,
|
|
u_int fport_arg, struct in_addr laddr, u_int lport_arg, int lookupflags,
|
|
struct ifnet *ifp)
|
|
{
|
|
struct inpcbhead *head;
|
|
struct inpcb *inp, *tmpinp;
|
|
u_short fport = fport_arg, lport = lport_arg;
|
|
|
|
KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0,
|
|
("%s: invalid lookup flags %d", __func__, lookupflags));
|
|
|
|
INP_HASH_LOCK_ASSERT(pcbinfo);
|
|
|
|
/*
|
|
* First look for an exact match.
|
|
*/
|
|
tmpinp = NULL;
|
|
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(faddr.s_addr, lport, fport,
|
|
pcbinfo->ipi_hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
#ifdef INET6
|
|
/* XXX inp locking */
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
|
continue;
|
|
#endif
|
|
if (inp->inp_faddr.s_addr == faddr.s_addr &&
|
|
inp->inp_laddr.s_addr == laddr.s_addr &&
|
|
inp->inp_fport == fport &&
|
|
inp->inp_lport == lport) {
|
|
/*
|
|
* XXX We should be able to directly return
|
|
* the inp here, without any checks.
|
|
* Well unless both bound with SO_REUSEPORT?
|
|
*/
|
|
if (prison_flag(inp->inp_cred, PR_IP4))
|
|
return (inp);
|
|
if (tmpinp == NULL)
|
|
tmpinp = inp;
|
|
}
|
|
}
|
|
if (tmpinp != NULL)
|
|
return (tmpinp);
|
|
|
|
/*
|
|
* Then look for a wildcard match, if requested.
|
|
*/
|
|
if ((lookupflags & INPLOOKUP_WILDCARD) != 0) {
|
|
struct inpcb *local_wild = NULL, *local_exact = NULL;
|
|
#ifdef INET6
|
|
struct inpcb *local_wild_mapped = NULL;
|
|
#endif
|
|
struct inpcb *jail_wild = NULL;
|
|
int injail;
|
|
|
|
/*
|
|
* Order of socket selection - we always prefer jails.
|
|
* 1. jailed, non-wild.
|
|
* 2. jailed, wild.
|
|
* 3. non-jailed, non-wild.
|
|
* 4. non-jailed, wild.
|
|
*/
|
|
|
|
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport,
|
|
0, pcbinfo->ipi_hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
#ifdef INET6
|
|
/* XXX inp locking */
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
|
continue;
|
|
#endif
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY ||
|
|
inp->inp_lport != lport)
|
|
continue;
|
|
|
|
injail = prison_flag(inp->inp_cred, PR_IP4);
|
|
if (injail) {
|
|
if (prison_check_ip4(inp->inp_cred,
|
|
&laddr) != 0)
|
|
continue;
|
|
} else {
|
|
if (local_exact != NULL)
|
|
continue;
|
|
}
|
|
|
|
if (inp->inp_laddr.s_addr == laddr.s_addr) {
|
|
if (injail)
|
|
return (inp);
|
|
else
|
|
local_exact = inp;
|
|
} else if (inp->inp_laddr.s_addr == INADDR_ANY) {
|
|
#ifdef INET6
|
|
/* XXX inp locking, NULL check */
|
|
if (inp->inp_vflag & INP_IPV6PROTO)
|
|
local_wild_mapped = inp;
|
|
else
|
|
#endif
|
|
if (injail)
|
|
jail_wild = inp;
|
|
else
|
|
local_wild = inp;
|
|
}
|
|
} /* LIST_FOREACH */
|
|
if (jail_wild != NULL)
|
|
return (jail_wild);
|
|
if (local_exact != NULL)
|
|
return (local_exact);
|
|
if (local_wild != NULL)
|
|
return (local_wild);
|
|
#ifdef INET6
|
|
if (local_wild_mapped != NULL)
|
|
return (local_wild_mapped);
|
|
#endif
|
|
} /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Lookup PCB in hash list, using pcbinfo tables. This variation locks the
|
|
* hash list lock, and will return the inpcb locked (i.e., requires
|
|
* INPLOOKUP_LOCKPCB).
|
|
*/
|
|
static struct inpcb *
|
|
in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
|
|
u_int fport, struct in_addr laddr, u_int lport, int lookupflags,
|
|
struct ifnet *ifp)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
INP_HASH_RLOCK(pcbinfo);
|
|
inp = in_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport,
|
|
(lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp);
|
|
if (inp != NULL) {
|
|
in_pcbref(inp);
|
|
INP_HASH_RUNLOCK(pcbinfo);
|
|
if (lookupflags & INPLOOKUP_WLOCKPCB) {
|
|
INP_WLOCK(inp);
|
|
if (in_pcbrele_wlocked(inp))
|
|
return (NULL);
|
|
} else if (lookupflags & INPLOOKUP_RLOCKPCB) {
|
|
INP_RLOCK(inp);
|
|
if (in_pcbrele_rlocked(inp))
|
|
return (NULL);
|
|
} else
|
|
panic("%s: locking bug", __func__);
|
|
} else
|
|
INP_HASH_RUNLOCK(pcbinfo);
|
|
return (inp);
|
|
}
|
|
|
|
/*
|
|
* Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf
|
|
* from which a pre-calculated hash value may be extracted.
|
|
*
|
|
* Possibly more of this logic should be in in_pcbgroup.c.
|
|
*/
|
|
struct inpcb *
|
|
in_pcblookup(struct inpcbinfo *pcbinfo, struct in_addr faddr, u_int fport,
|
|
struct in_addr laddr, u_int lport, int lookupflags, struct ifnet *ifp)
|
|
{
|
|
#if defined(PCBGROUP) && !defined(RSS)
|
|
struct inpcbgroup *pcbgroup;
|
|
#endif
|
|
|
|
KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
|
|
("%s: invalid lookup flags %d", __func__, lookupflags));
|
|
KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
|
|
("%s: LOCKPCB not set", __func__));
|
|
|
|
/*
|
|
* When not using RSS, use connection groups in preference to the
|
|
* reservation table when looking up 4-tuples. When using RSS, just
|
|
* use the reservation table, due to the cost of the Toeplitz hash
|
|
* in software.
|
|
*
|
|
* XXXRW: This policy belongs in the pcbgroup code, as in principle
|
|
* we could be doing RSS with a non-Toeplitz hash that is affordable
|
|
* in software.
|
|
*/
|
|
#if defined(PCBGROUP) && !defined(RSS)
|
|
if (in_pcbgroup_enabled(pcbinfo)) {
|
|
pcbgroup = in_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
|
|
fport);
|
|
return (in_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
|
|
laddr, lport, lookupflags, ifp));
|
|
}
|
|
#endif
|
|
return (in_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
|
|
lookupflags, ifp));
|
|
}
|
|
|
|
struct inpcb *
|
|
in_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in_addr faddr,
|
|
u_int fport, struct in_addr laddr, u_int lport, int lookupflags,
|
|
struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
#ifdef PCBGROUP
|
|
struct inpcbgroup *pcbgroup;
|
|
#endif
|
|
|
|
KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0,
|
|
("%s: invalid lookup flags %d", __func__, lookupflags));
|
|
KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0,
|
|
("%s: LOCKPCB not set", __func__));
|
|
|
|
#ifdef PCBGROUP
|
|
/*
|
|
* If we can use a hardware-generated hash to look up the connection
|
|
* group, use that connection group to find the inpcb. Otherwise
|
|
* fall back on a software hash -- or the reservation table if we're
|
|
* using RSS.
|
|
*
|
|
* XXXRW: As above, that policy belongs in the pcbgroup code.
|
|
*/
|
|
if (in_pcbgroup_enabled(pcbinfo) &&
|
|
!(M_HASHTYPE_TEST(m, M_HASHTYPE_NONE))) {
|
|
pcbgroup = in_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
|
|
m->m_pkthdr.flowid);
|
|
if (pcbgroup != NULL)
|
|
return (in_pcblookup_group(pcbinfo, pcbgroup, faddr,
|
|
fport, laddr, lport, lookupflags, ifp));
|
|
#ifndef RSS
|
|
pcbgroup = in_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr,
|
|
fport);
|
|
return (in_pcblookup_group(pcbinfo, pcbgroup, faddr, fport,
|
|
laddr, lport, lookupflags, ifp));
|
|
#endif
|
|
}
|
|
#endif
|
|
return (in_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport,
|
|
lookupflags, ifp));
|
|
}
|
|
#endif /* INET */
|
|
|
|
/*
|
|
* Insert PCB onto various hash lists.
|
|
*/
|
|
static int
|
|
in_pcbinshash_internal(struct inpcb *inp, int do_pcbgroup_update)
|
|
{
|
|
struct inpcbhead *pcbhash;
|
|
struct inpcbporthead *pcbporthash;
|
|
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
|
|
struct inpcbport *phd;
|
|
u_int32_t hashkey_faddr;
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
INP_HASH_WLOCK_ASSERT(pcbinfo);
|
|
|
|
KASSERT((inp->inp_flags & INP_INHASHLIST) == 0,
|
|
("in_pcbinshash: INP_INHASHLIST"));
|
|
|
|
#ifdef INET6
|
|
if (inp->inp_vflag & INP_IPV6)
|
|
hashkey_faddr = INP6_PCBHASHKEY(&inp->in6p_faddr);
|
|
else
|
|
#endif
|
|
hashkey_faddr = inp->inp_faddr.s_addr;
|
|
|
|
pcbhash = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
|
|
inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
|
|
|
|
pcbporthash = &pcbinfo->ipi_porthashbase[
|
|
INP_PCBPORTHASH(inp->inp_lport, pcbinfo->ipi_porthashmask)];
|
|
|
|
/*
|
|
* Go through port list and look for a head for this lport.
|
|
*/
|
|
LIST_FOREACH(phd, pcbporthash, phd_hash) {
|
|
if (phd->phd_port == inp->inp_lport)
|
|
break;
|
|
}
|
|
/*
|
|
* If none exists, malloc one and tack it on.
|
|
*/
|
|
if (phd == NULL) {
|
|
phd = malloc(sizeof(struct inpcbport), M_PCB, M_NOWAIT);
|
|
if (phd == NULL) {
|
|
return (ENOBUFS); /* XXX */
|
|
}
|
|
phd->phd_port = inp->inp_lport;
|
|
LIST_INIT(&phd->phd_pcblist);
|
|
LIST_INSERT_HEAD(pcbporthash, phd, phd_hash);
|
|
}
|
|
inp->inp_phd = phd;
|
|
LIST_INSERT_HEAD(&phd->phd_pcblist, inp, inp_portlist);
|
|
LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
|
|
inp->inp_flags |= INP_INHASHLIST;
|
|
#ifdef PCBGROUP
|
|
if (do_pcbgroup_update)
|
|
in_pcbgroup_update(inp);
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* For now, there are two public interfaces to insert an inpcb into the hash
|
|
* lists -- one that does update pcbgroups, and one that doesn't. The latter
|
|
* is used only in the TCP syncache, where in_pcbinshash is called before the
|
|
* full 4-tuple is set for the inpcb, and we don't want to install in the
|
|
* pcbgroup until later.
|
|
*
|
|
* XXXRW: This seems like a misfeature. in_pcbinshash should always update
|
|
* connection groups, and partially initialised inpcbs should not be exposed
|
|
* to either reservation hash tables or pcbgroups.
|
|
*/
|
|
int
|
|
in_pcbinshash(struct inpcb *inp)
|
|
{
|
|
|
|
return (in_pcbinshash_internal(inp, 1));
|
|
}
|
|
|
|
int
|
|
in_pcbinshash_nopcbgroup(struct inpcb *inp)
|
|
{
|
|
|
|
return (in_pcbinshash_internal(inp, 0));
|
|
}
|
|
|
|
/*
|
|
* Move PCB to the proper hash bucket when { faddr, fport } have been
|
|
* changed. NOTE: This does not handle the case of the lport changing (the
|
|
* hashed port list would have to be updated as well), so the lport must
|
|
* not change after in_pcbinshash() has been called.
|
|
*/
|
|
void
|
|
in_pcbrehash_mbuf(struct inpcb *inp, struct mbuf *m)
|
|
{
|
|
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
|
|
struct inpcbhead *head;
|
|
u_int32_t hashkey_faddr;
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
INP_HASH_WLOCK_ASSERT(pcbinfo);
|
|
|
|
KASSERT(inp->inp_flags & INP_INHASHLIST,
|
|
("in_pcbrehash: !INP_INHASHLIST"));
|
|
|
|
#ifdef INET6
|
|
if (inp->inp_vflag & INP_IPV6)
|
|
hashkey_faddr = INP6_PCBHASHKEY(&inp->in6p_faddr);
|
|
else
|
|
#endif
|
|
hashkey_faddr = inp->inp_faddr.s_addr;
|
|
|
|
head = &pcbinfo->ipi_hashbase[INP_PCBHASH(hashkey_faddr,
|
|
inp->inp_lport, inp->inp_fport, pcbinfo->ipi_hashmask)];
|
|
|
|
LIST_REMOVE(inp, inp_hash);
|
|
LIST_INSERT_HEAD(head, inp, inp_hash);
|
|
|
|
#ifdef PCBGROUP
|
|
if (m != NULL)
|
|
in_pcbgroup_update_mbuf(inp, m);
|
|
else
|
|
in_pcbgroup_update(inp);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
in_pcbrehash(struct inpcb *inp)
|
|
{
|
|
|
|
in_pcbrehash_mbuf(inp, NULL);
|
|
}
|
|
|
|
/*
|
|
* Remove PCB from various lists.
|
|
*/
|
|
static void
|
|
in_pcbremlists(struct inpcb *inp)
|
|
{
|
|
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
|
|
|
|
#ifdef INVARIANTS
|
|
if (pcbinfo == &V_tcbinfo) {
|
|
INP_INFO_RLOCK_ASSERT(pcbinfo);
|
|
} else {
|
|
INP_INFO_WLOCK_ASSERT(pcbinfo);
|
|
}
|
|
#endif
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
INP_LIST_WLOCK_ASSERT(pcbinfo);
|
|
|
|
inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
|
|
if (inp->inp_flags & INP_INHASHLIST) {
|
|
struct inpcbport *phd = inp->inp_phd;
|
|
|
|
INP_HASH_WLOCK(pcbinfo);
|
|
LIST_REMOVE(inp, inp_hash);
|
|
LIST_REMOVE(inp, inp_portlist);
|
|
if (LIST_FIRST(&phd->phd_pcblist) == NULL) {
|
|
LIST_REMOVE(phd, phd_hash);
|
|
free(phd, M_PCB);
|
|
}
|
|
INP_HASH_WUNLOCK(pcbinfo);
|
|
inp->inp_flags &= ~INP_INHASHLIST;
|
|
}
|
|
LIST_REMOVE(inp, inp_list);
|
|
pcbinfo->ipi_count--;
|
|
#ifdef PCBGROUP
|
|
in_pcbgroup_remove(inp);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Check for alternatives when higher level complains
|
|
* about service problems. For now, invalidate cached
|
|
* routing information. If the route was created dynamically
|
|
* (by a redirect), time to try a default gateway again.
|
|
*/
|
|
void
|
|
in_losing(struct inpcb *inp)
|
|
{
|
|
|
|
RO_RTFREE(&inp->inp_route);
|
|
if (inp->inp_route.ro_lle)
|
|
LLE_FREE(inp->inp_route.ro_lle); /* zeros ro_lle */
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* A set label operation has occurred at the socket layer, propagate the
|
|
* label change into the in_pcb for the socket.
|
|
*/
|
|
void
|
|
in_pcbsosetlabel(struct socket *so)
|
|
{
|
|
#ifdef MAC
|
|
struct inpcb *inp;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL"));
|
|
|
|
INP_WLOCK(inp);
|
|
SOCK_LOCK(so);
|
|
mac_inpcb_sosetlabel(so, inp);
|
|
SOCK_UNLOCK(so);
|
|
INP_WUNLOCK(inp);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* ipport_tick runs once per second, determining if random port allocation
|
|
* should be continued. If more than ipport_randomcps ports have been
|
|
* allocated in the last second, then we return to sequential port
|
|
* allocation. We return to random allocation only once we drop below
|
|
* ipport_randomcps for at least ipport_randomtime seconds.
|
|
*/
|
|
static void
|
|
ipport_tick(void *xtp)
|
|
{
|
|
VNET_ITERATOR_DECL(vnet_iter);
|
|
|
|
VNET_LIST_RLOCK_NOSLEEP();
|
|
VNET_FOREACH(vnet_iter) {
|
|
CURVNET_SET(vnet_iter); /* XXX appease INVARIANTS here */
|
|
if (V_ipport_tcpallocs <=
|
|
V_ipport_tcplastcount + V_ipport_randomcps) {
|
|
if (V_ipport_stoprandom > 0)
|
|
V_ipport_stoprandom--;
|
|
} else
|
|
V_ipport_stoprandom = V_ipport_randomtime;
|
|
V_ipport_tcplastcount = V_ipport_tcpallocs;
|
|
CURVNET_RESTORE();
|
|
}
|
|
VNET_LIST_RUNLOCK_NOSLEEP();
|
|
callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL);
|
|
}
|
|
|
|
static void
|
|
ip_fini(void *xtp)
|
|
{
|
|
|
|
callout_stop(&ipport_tick_callout);
|
|
}
|
|
|
|
/*
|
|
* The ipport_callout should start running at about the time we attach the
|
|
* inet or inet6 domains.
|
|
*/
|
|
static void
|
|
ipport_tick_init(const void *unused __unused)
|
|
{
|
|
|
|
/* Start ipport_tick. */
|
|
callout_init(&ipport_tick_callout, 1);
|
|
callout_reset(&ipport_tick_callout, 1, ipport_tick, NULL);
|
|
EVENTHANDLER_REGISTER(shutdown_pre_sync, ip_fini, NULL,
|
|
SHUTDOWN_PRI_DEFAULT);
|
|
}
|
|
SYSINIT(ipport_tick_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_MIDDLE,
|
|
ipport_tick_init, NULL);
|
|
|
|
void
|
|
inp_wlock(struct inpcb *inp)
|
|
{
|
|
|
|
INP_WLOCK(inp);
|
|
}
|
|
|
|
void
|
|
inp_wunlock(struct inpcb *inp)
|
|
{
|
|
|
|
INP_WUNLOCK(inp);
|
|
}
|
|
|
|
void
|
|
inp_rlock(struct inpcb *inp)
|
|
{
|
|
|
|
INP_RLOCK(inp);
|
|
}
|
|
|
|
void
|
|
inp_runlock(struct inpcb *inp)
|
|
{
|
|
|
|
INP_RUNLOCK(inp);
|
|
}
|
|
|
|
#ifdef INVARIANT_SUPPORT
|
|
void
|
|
inp_lock_assert(struct inpcb *inp)
|
|
{
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
}
|
|
|
|
void
|
|
inp_unlock_assert(struct inpcb *inp)
|
|
{
|
|
|
|
INP_UNLOCK_ASSERT(inp);
|
|
}
|
|
#endif
|
|
|
|
void
|
|
inp_apply_all(void (*func)(struct inpcb *, void *), void *arg)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
INP_INFO_WLOCK(&V_tcbinfo);
|
|
LIST_FOREACH(inp, V_tcbinfo.ipi_listhead, inp_list) {
|
|
INP_WLOCK(inp);
|
|
func(inp, arg);
|
|
INP_WUNLOCK(inp);
|
|
}
|
|
INP_INFO_WUNLOCK(&V_tcbinfo);
|
|
}
|
|
|
|
struct socket *
|
|
inp_inpcbtosocket(struct inpcb *inp)
|
|
{
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
return (inp->inp_socket);
|
|
}
|
|
|
|
struct tcpcb *
|
|
inp_inpcbtotcpcb(struct inpcb *inp)
|
|
{
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
return ((struct tcpcb *)inp->inp_ppcb);
|
|
}
|
|
|
|
int
|
|
inp_ip_tos_get(const struct inpcb *inp)
|
|
{
|
|
|
|
return (inp->inp_ip_tos);
|
|
}
|
|
|
|
void
|
|
inp_ip_tos_set(struct inpcb *inp, int val)
|
|
{
|
|
|
|
inp->inp_ip_tos = val;
|
|
}
|
|
|
|
void
|
|
inp_4tuple_get(struct inpcb *inp, uint32_t *laddr, uint16_t *lp,
|
|
uint32_t *faddr, uint16_t *fp)
|
|
{
|
|
|
|
INP_LOCK_ASSERT(inp);
|
|
*laddr = inp->inp_laddr.s_addr;
|
|
*faddr = inp->inp_faddr.s_addr;
|
|
*lp = inp->inp_lport;
|
|
*fp = inp->inp_fport;
|
|
}
|
|
|
|
struct inpcb *
|
|
so_sotoinpcb(struct socket *so)
|
|
{
|
|
|
|
return (sotoinpcb(so));
|
|
}
|
|
|
|
struct tcpcb *
|
|
so_sototcpcb(struct socket *so)
|
|
{
|
|
|
|
return (sototcpcb(so));
|
|
}
|
|
|
|
#ifdef DDB
|
|
static void
|
|
db_print_indent(int indent)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < indent; i++)
|
|
db_printf(" ");
|
|
}
|
|
|
|
static void
|
|
db_print_inconninfo(struct in_conninfo *inc, const char *name, int indent)
|
|
{
|
|
char faddr_str[48], laddr_str[48];
|
|
|
|
db_print_indent(indent);
|
|
db_printf("%s at %p\n", name, inc);
|
|
|
|
indent += 2;
|
|
|
|
#ifdef INET6
|
|
if (inc->inc_flags & INC_ISIPV6) {
|
|
/* IPv6. */
|
|
ip6_sprintf(laddr_str, &inc->inc6_laddr);
|
|
ip6_sprintf(faddr_str, &inc->inc6_faddr);
|
|
} else
|
|
#endif
|
|
{
|
|
/* IPv4. */
|
|
inet_ntoa_r(inc->inc_laddr, laddr_str);
|
|
inet_ntoa_r(inc->inc_faddr, faddr_str);
|
|
}
|
|
db_print_indent(indent);
|
|
db_printf("inc_laddr %s inc_lport %u\n", laddr_str,
|
|
ntohs(inc->inc_lport));
|
|
db_print_indent(indent);
|
|
db_printf("inc_faddr %s inc_fport %u\n", faddr_str,
|
|
ntohs(inc->inc_fport));
|
|
}
|
|
|
|
static void
|
|
db_print_inpflags(int inp_flags)
|
|
{
|
|
int comma;
|
|
|
|
comma = 0;
|
|
if (inp_flags & INP_RECVOPTS) {
|
|
db_printf("%sINP_RECVOPTS", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_RECVRETOPTS) {
|
|
db_printf("%sINP_RECVRETOPTS", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_RECVDSTADDR) {
|
|
db_printf("%sINP_RECVDSTADDR", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_ORIGDSTADDR) {
|
|
db_printf("%sINP_ORIGDSTADDR", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_HDRINCL) {
|
|
db_printf("%sINP_HDRINCL", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_HIGHPORT) {
|
|
db_printf("%sINP_HIGHPORT", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_LOWPORT) {
|
|
db_printf("%sINP_LOWPORT", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_ANONPORT) {
|
|
db_printf("%sINP_ANONPORT", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_RECVIF) {
|
|
db_printf("%sINP_RECVIF", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_MTUDISC) {
|
|
db_printf("%sINP_MTUDISC", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_RECVTTL) {
|
|
db_printf("%sINP_RECVTTL", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_DONTFRAG) {
|
|
db_printf("%sINP_DONTFRAG", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_RECVTOS) {
|
|
db_printf("%sINP_RECVTOS", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_IPV6_V6ONLY) {
|
|
db_printf("%sIN6P_IPV6_V6ONLY", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_PKTINFO) {
|
|
db_printf("%sIN6P_PKTINFO", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_HOPLIMIT) {
|
|
db_printf("%sIN6P_HOPLIMIT", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_HOPOPTS) {
|
|
db_printf("%sIN6P_HOPOPTS", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_DSTOPTS) {
|
|
db_printf("%sIN6P_DSTOPTS", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_RTHDR) {
|
|
db_printf("%sIN6P_RTHDR", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_RTHDRDSTOPTS) {
|
|
db_printf("%sIN6P_RTHDRDSTOPTS", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_TCLASS) {
|
|
db_printf("%sIN6P_TCLASS", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_AUTOFLOWLABEL) {
|
|
db_printf("%sIN6P_AUTOFLOWLABEL", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_TIMEWAIT) {
|
|
db_printf("%sINP_TIMEWAIT", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_ONESBCAST) {
|
|
db_printf("%sINP_ONESBCAST", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_DROPPED) {
|
|
db_printf("%sINP_DROPPED", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & INP_SOCKREF) {
|
|
db_printf("%sINP_SOCKREF", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_RFC2292) {
|
|
db_printf("%sIN6P_RFC2292", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_flags & IN6P_MTU) {
|
|
db_printf("IN6P_MTU%s", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
db_print_inpvflag(u_char inp_vflag)
|
|
{
|
|
int comma;
|
|
|
|
comma = 0;
|
|
if (inp_vflag & INP_IPV4) {
|
|
db_printf("%sINP_IPV4", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_vflag & INP_IPV6) {
|
|
db_printf("%sINP_IPV6", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
if (inp_vflag & INP_IPV6PROTO) {
|
|
db_printf("%sINP_IPV6PROTO", comma ? ", " : "");
|
|
comma = 1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
db_print_inpcb(struct inpcb *inp, const char *name, int indent)
|
|
{
|
|
|
|
db_print_indent(indent);
|
|
db_printf("%s at %p\n", name, inp);
|
|
|
|
indent += 2;
|
|
|
|
db_print_indent(indent);
|
|
db_printf("inp_flow: 0x%x\n", inp->inp_flow);
|
|
|
|
db_print_inconninfo(&inp->inp_inc, "inp_conninfo", indent);
|
|
|
|
db_print_indent(indent);
|
|
db_printf("inp_ppcb: %p inp_pcbinfo: %p inp_socket: %p\n",
|
|
inp->inp_ppcb, inp->inp_pcbinfo, inp->inp_socket);
|
|
|
|
db_print_indent(indent);
|
|
db_printf("inp_label: %p inp_flags: 0x%x (",
|
|
inp->inp_label, inp->inp_flags);
|
|
db_print_inpflags(inp->inp_flags);
|
|
db_printf(")\n");
|
|
|
|
db_print_indent(indent);
|
|
db_printf("inp_sp: %p inp_vflag: 0x%x (", inp->inp_sp,
|
|
inp->inp_vflag);
|
|
db_print_inpvflag(inp->inp_vflag);
|
|
db_printf(")\n");
|
|
|
|
db_print_indent(indent);
|
|
db_printf("inp_ip_ttl: %d inp_ip_p: %d inp_ip_minttl: %d\n",
|
|
inp->inp_ip_ttl, inp->inp_ip_p, inp->inp_ip_minttl);
|
|
|
|
db_print_indent(indent);
|
|
#ifdef INET6
|
|
if (inp->inp_vflag & INP_IPV6) {
|
|
db_printf("in6p_options: %p in6p_outputopts: %p "
|
|
"in6p_moptions: %p\n", inp->in6p_options,
|
|
inp->in6p_outputopts, inp->in6p_moptions);
|
|
db_printf("in6p_icmp6filt: %p in6p_cksum %d "
|
|
"in6p_hops %u\n", inp->in6p_icmp6filt, inp->in6p_cksum,
|
|
inp->in6p_hops);
|
|
} else
|
|
#endif
|
|
{
|
|
db_printf("inp_ip_tos: %d inp_ip_options: %p "
|
|
"inp_ip_moptions: %p\n", inp->inp_ip_tos,
|
|
inp->inp_options, inp->inp_moptions);
|
|
}
|
|
|
|
db_print_indent(indent);
|
|
db_printf("inp_phd: %p inp_gencnt: %ju\n", inp->inp_phd,
|
|
(uintmax_t)inp->inp_gencnt);
|
|
}
|
|
|
|
DB_SHOW_COMMAND(inpcb, db_show_inpcb)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
if (!have_addr) {
|
|
db_printf("usage: show inpcb <addr>\n");
|
|
return;
|
|
}
|
|
inp = (struct inpcb *)addr;
|
|
|
|
db_print_inpcb(inp, "inpcb", 0);
|
|
}
|
|
#endif /* DDB */
|
|
|
|
#ifdef RATELIMIT
|
|
/*
|
|
* Modify TX rate limit based on the existing "inp->inp_snd_tag",
|
|
* if any.
|
|
*/
|
|
int
|
|
in_pcbmodify_txrtlmt(struct inpcb *inp, uint32_t max_pacing_rate)
|
|
{
|
|
union if_snd_tag_modify_params params = {
|
|
.rate_limit.max_rate = max_pacing_rate,
|
|
};
|
|
struct m_snd_tag *mst;
|
|
struct ifnet *ifp;
|
|
int error;
|
|
|
|
mst = inp->inp_snd_tag;
|
|
if (mst == NULL)
|
|
return (EINVAL);
|
|
|
|
ifp = mst->ifp;
|
|
if (ifp == NULL)
|
|
return (EINVAL);
|
|
|
|
if (ifp->if_snd_tag_modify == NULL) {
|
|
error = EOPNOTSUPP;
|
|
} else {
|
|
error = ifp->if_snd_tag_modify(mst, ¶ms);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Query existing TX rate limit based on the existing
|
|
* "inp->inp_snd_tag", if any.
|
|
*/
|
|
int
|
|
in_pcbquery_txrtlmt(struct inpcb *inp, uint32_t *p_max_pacing_rate)
|
|
{
|
|
union if_snd_tag_query_params params = { };
|
|
struct m_snd_tag *mst;
|
|
struct ifnet *ifp;
|
|
int error;
|
|
|
|
mst = inp->inp_snd_tag;
|
|
if (mst == NULL)
|
|
return (EINVAL);
|
|
|
|
ifp = mst->ifp;
|
|
if (ifp == NULL)
|
|
return (EINVAL);
|
|
|
|
if (ifp->if_snd_tag_query == NULL) {
|
|
error = EOPNOTSUPP;
|
|
} else {
|
|
error = ifp->if_snd_tag_query(mst, ¶ms);
|
|
if (error == 0 && p_max_pacing_rate != NULL)
|
|
*p_max_pacing_rate = params.rate_limit.max_rate;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Allocate a new TX rate limit send tag from the network interface
|
|
* given by the "ifp" argument and save it in "inp->inp_snd_tag":
|
|
*/
|
|
int
|
|
in_pcbattach_txrtlmt(struct inpcb *inp, struct ifnet *ifp,
|
|
uint32_t flowtype, uint32_t flowid, uint32_t max_pacing_rate)
|
|
{
|
|
union if_snd_tag_alloc_params params = {
|
|
.rate_limit.hdr.type = IF_SND_TAG_TYPE_RATE_LIMIT,
|
|
.rate_limit.hdr.flowid = flowid,
|
|
.rate_limit.hdr.flowtype = flowtype,
|
|
.rate_limit.max_rate = max_pacing_rate,
|
|
};
|
|
int error;
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
|
|
if (inp->inp_snd_tag != NULL)
|
|
return (EINVAL);
|
|
|
|
if (ifp->if_snd_tag_alloc == NULL) {
|
|
error = EOPNOTSUPP;
|
|
} else {
|
|
error = ifp->if_snd_tag_alloc(ifp, ¶ms, &inp->inp_snd_tag);
|
|
|
|
/*
|
|
* At success increment the refcount on
|
|
* the send tag's network interface:
|
|
*/
|
|
if (error == 0)
|
|
if_ref(inp->inp_snd_tag->ifp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Free an existing TX rate limit tag based on the "inp->inp_snd_tag",
|
|
* if any:
|
|
*/
|
|
void
|
|
in_pcbdetach_txrtlmt(struct inpcb *inp)
|
|
{
|
|
struct m_snd_tag *mst;
|
|
struct ifnet *ifp;
|
|
|
|
INP_WLOCK_ASSERT(inp);
|
|
|
|
mst = inp->inp_snd_tag;
|
|
inp->inp_snd_tag = NULL;
|
|
|
|
if (mst == NULL)
|
|
return;
|
|
|
|
ifp = mst->ifp;
|
|
if (ifp == NULL)
|
|
return;
|
|
|
|
/*
|
|
* If the device was detached while we still had reference(s)
|
|
* on the ifp, we assume if_snd_tag_free() was replaced with
|
|
* stubs.
|
|
*/
|
|
ifp->if_snd_tag_free(mst);
|
|
|
|
/* release reference count on network interface */
|
|
if_rele(ifp);
|
|
}
|
|
|
|
/*
|
|
* This function should be called when the INP_RATE_LIMIT_CHANGED flag
|
|
* is set in the fast path and will attach/detach/modify the TX rate
|
|
* limit send tag based on the socket's so_max_pacing_rate value.
|
|
*/
|
|
void
|
|
in_pcboutput_txrtlmt(struct inpcb *inp, struct ifnet *ifp, struct mbuf *mb)
|
|
{
|
|
struct socket *socket;
|
|
uint32_t max_pacing_rate;
|
|
bool did_upgrade;
|
|
int error;
|
|
|
|
if (inp == NULL)
|
|
return;
|
|
|
|
socket = inp->inp_socket;
|
|
if (socket == NULL)
|
|
return;
|
|
|
|
if (!INP_WLOCKED(inp)) {
|
|
/*
|
|
* NOTE: If the write locking fails, we need to bail
|
|
* out and use the non-ratelimited ring for the
|
|
* transmit until there is a new chance to get the
|
|
* write lock.
|
|
*/
|
|
if (!INP_TRY_UPGRADE(inp))
|
|
return;
|
|
did_upgrade = 1;
|
|
} else {
|
|
did_upgrade = 0;
|
|
}
|
|
|
|
/*
|
|
* NOTE: The so_max_pacing_rate value is read unlocked,
|
|
* because atomic updates are not required since the variable
|
|
* is checked at every mbuf we send. It is assumed that the
|
|
* variable read itself will be atomic.
|
|
*/
|
|
max_pacing_rate = socket->so_max_pacing_rate;
|
|
|
|
/*
|
|
* NOTE: When attaching to a network interface a reference is
|
|
* made to ensure the network interface doesn't go away until
|
|
* all ratelimit connections are gone. The network interface
|
|
* pointers compared below represent valid network interfaces,
|
|
* except when comparing towards NULL.
|
|
*/
|
|
if (max_pacing_rate == 0 && inp->inp_snd_tag == NULL) {
|
|
error = 0;
|
|
} else if (!(ifp->if_capenable & IFCAP_TXRTLMT)) {
|
|
if (inp->inp_snd_tag != NULL)
|
|
in_pcbdetach_txrtlmt(inp);
|
|
error = 0;
|
|
} else if (inp->inp_snd_tag == NULL) {
|
|
/*
|
|
* In order to utilize packet pacing with RSS, we need
|
|
* to wait until there is a valid RSS hash before we
|
|
* can proceed:
|
|
*/
|
|
if (M_HASHTYPE_GET(mb) == M_HASHTYPE_NONE) {
|
|
error = EAGAIN;
|
|
} else {
|
|
error = in_pcbattach_txrtlmt(inp, ifp, M_HASHTYPE_GET(mb),
|
|
mb->m_pkthdr.flowid, max_pacing_rate);
|
|
}
|
|
} else {
|
|
error = in_pcbmodify_txrtlmt(inp, max_pacing_rate);
|
|
}
|
|
if (error == 0 || error == EOPNOTSUPP)
|
|
inp->inp_flags2 &= ~INP_RATE_LIMIT_CHANGED;
|
|
if (did_upgrade)
|
|
INP_DOWNGRADE(inp);
|
|
}
|
|
|
|
/*
|
|
* Track route changes for TX rate limiting.
|
|
*/
|
|
void
|
|
in_pcboutput_eagain(struct inpcb *inp)
|
|
{
|
|
struct socket *socket;
|
|
bool did_upgrade;
|
|
|
|
if (inp == NULL)
|
|
return;
|
|
|
|
socket = inp->inp_socket;
|
|
if (socket == NULL)
|
|
return;
|
|
|
|
if (inp->inp_snd_tag == NULL)
|
|
return;
|
|
|
|
if (!INP_WLOCKED(inp)) {
|
|
/*
|
|
* NOTE: If the write locking fails, we need to bail
|
|
* out and use the non-ratelimited ring for the
|
|
* transmit until there is a new chance to get the
|
|
* write lock.
|
|
*/
|
|
if (!INP_TRY_UPGRADE(inp))
|
|
return;
|
|
did_upgrade = 1;
|
|
} else {
|
|
did_upgrade = 0;
|
|
}
|
|
|
|
/* detach rate limiting */
|
|
in_pcbdetach_txrtlmt(inp);
|
|
|
|
/* make sure new mbuf send tag allocation is made */
|
|
inp->inp_flags2 |= INP_RATE_LIMIT_CHANGED;
|
|
|
|
if (did_upgrade)
|
|
INP_DOWNGRADE(inp);
|
|
}
|
|
#endif /* RATELIMIT */
|