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548c676b32
Submitted by: "Bjoern A. Zeeb" <bzeeb+freebsd@zabbadoz.net> Reviewed by: itojun
1195 lines
31 KiB
C
1195 lines
31 KiB
C
/*
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* Copyright (c) 1982, 1986, 1991, 1993, 1995
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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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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* $FreeBSD$
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*/
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#include "opt_ipsec.h"
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#include "opt_inet6.h"
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#include "opt_mac.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/limits.h>
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#include <sys/mac.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/proc.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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#include <vm/uma.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_pcb.h>
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#include <netinet/in_var.h>
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#include <netinet/ip_var.h>
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#include <netinet/tcp_var.h>
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#ifdef INET6
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#endif /* INET6 */
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#ifdef IPSEC
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#include <netinet6/ipsec.h>
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#include <netkey/key.h>
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#endif /* IPSEC */
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#ifdef FAST_IPSEC
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#if defined(IPSEC) || defined(IPSEC_ESP)
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#error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
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#endif
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#include <netipsec/ipsec.h>
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#include <netipsec/key.h>
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#endif /* FAST_IPSEC */
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struct in_addr zeroin_addr;
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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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int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
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int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
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int ipport_firstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
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int ipport_lastauto = IPPORT_HILASTAUTO; /* 65535 */
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int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
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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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int ipport_reservedhigh = IPPORT_RESERVED - 1; /* 1023 */
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int ipport_reservedlow = 0;
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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 = sysctl_handle_int(oidp,
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oidp->oid_arg1, oidp->oid_arg2, req);
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if (!error) {
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RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
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RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
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RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
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RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
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RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
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RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_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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SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
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&ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
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&ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
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&ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
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&ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
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&ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
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SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
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&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_RW|CTLFLAG_SECURE, &ipport_reservedhigh, 0, "");
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SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, reservedlow,
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CTLFLAG_RW|CTLFLAG_SECURE, &ipport_reservedlow, 0, "");
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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 at
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* splnet(). XXX - There are, unfortunately, a few exceptions to this
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* rule that should be fixed.
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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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*/
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int
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in_pcballoc(so, pcbinfo, td, type)
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struct socket *so;
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struct inpcbinfo *pcbinfo;
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struct thread *td;
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const char *type;
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{
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register struct inpcb *inp;
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int error;
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INP_INFO_WLOCK_ASSERT(pcbinfo);
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error = 0;
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inp = uma_zalloc(pcbinfo->ipi_zone, M_NOWAIT | M_ZERO);
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if (inp == NULL)
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return (ENOBUFS);
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inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
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inp->inp_pcbinfo = pcbinfo;
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inp->inp_socket = so;
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#ifdef MAC
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error = mac_init_inpcb(inp, M_NOWAIT);
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if (error != 0)
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goto out;
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mac_create_inpcb_from_socket(so, inp);
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#endif
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#if defined(IPSEC) || defined(FAST_IPSEC)
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#ifdef FAST_IPSEC
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error = ipsec_init_policy(so, &inp->inp_sp);
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#else
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error = ipsec_init_pcbpolicy(so, &inp->inp_sp);
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#endif
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if (error != 0)
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goto out;
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#endif /*IPSEC*/
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#if defined(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 (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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LIST_INSERT_HEAD(pcbinfo->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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INP_LOCK_INIT(inp, "inp", type);
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#ifdef INET6
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if (ip6_auto_flowlabel)
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inp->inp_flags |= IN6P_AUTOFLOWLABEL;
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#endif
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#if defined(IPSEC) || defined(FAST_IPSEC) || defined(MAC)
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out:
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if (error != 0)
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uma_zfree(pcbinfo->ipi_zone, inp);
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#endif
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return (error);
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}
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int
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in_pcbbind(inp, nam, td)
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register struct inpcb *inp;
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struct sockaddr *nam;
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struct thread *td;
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{
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int anonport, error;
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INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
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INP_LOCK_ASSERT(inp);
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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 = inp->inp_lport == 0 && (nam == NULL ||
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((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, td);
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if (error)
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return (error);
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if (in_pcbinshash(inp) != 0) {
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inp->inp_laddr.s_addr = INADDR_ANY;
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inp->inp_lport = 0;
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return (EAGAIN);
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}
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if (anonport)
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inp->inp_flags |= INP_ANONPORT;
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return (0);
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}
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/*
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* Set up a bind operation on a PCB, performing port allocation
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* as required, but do not actually modify the PCB. Callers can
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* either complete the bind by setting inp_laddr/inp_lport and
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* calling in_pcbinshash(), or they can just use the resulting
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* port and address to authorise the sending of a once-off packet.
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*
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* On error, the values of *laddrp and *lportp are not changed.
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*/
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int
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in_pcbbind_setup(inp, nam, laddrp, lportp, td)
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struct inpcb *inp;
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struct sockaddr *nam;
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in_addr_t *laddrp;
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u_short *lportp;
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struct thread *td;
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{
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struct socket *so = inp->inp_socket;
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unsigned short *lastport;
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struct sockaddr_in *sin;
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struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
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struct in_addr laddr;
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u_short lport = 0;
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int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
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int error, prison = 0;
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INP_INFO_WLOCK_ASSERT(pcbinfo);
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INP_LOCK_ASSERT(inp);
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if (TAILQ_EMPTY(&in_ifaddrhead)) /* XXX broken! */
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return (EADDRNOTAVAIL);
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laddr.s_addr = *laddrp;
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if (nam != NULL && laddr.s_addr != INADDR_ANY)
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return (EINVAL);
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if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0)
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wild = 1;
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if (nam) {
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sin = (struct sockaddr_in *)nam;
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if (nam->sa_len != sizeof (*sin))
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return (EINVAL);
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#ifdef notdef
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/*
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* We should check the family, but old programs
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* incorrectly fail to initialize it.
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*/
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if (sin->sin_family != AF_INET)
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return (EAFNOSUPPORT);
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#endif
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if (sin->sin_addr.s_addr != INADDR_ANY)
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if (prison_ip(td->td_ucred, 0, &sin->sin_addr.s_addr))
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return(EINVAL);
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if (sin->sin_port != *lportp) {
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/* Don't allow the port to change. */
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if (*lportp != 0)
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return (EINVAL);
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lport = sin->sin_port;
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}
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/* NB: lport is left as 0 if the port isn't being changed. */
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if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
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/*
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* Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
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* allow complete duplication of binding if
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* SO_REUSEPORT is set, or if SO_REUSEADDR is set
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* and a multicast address is bound on both
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* new and duplicated sockets.
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*/
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if (so->so_options & SO_REUSEADDR)
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reuseport = SO_REUSEADDR|SO_REUSEPORT;
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} else if (sin->sin_addr.s_addr != INADDR_ANY) {
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sin->sin_port = 0; /* yech... */
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bzero(&sin->sin_zero, sizeof(sin->sin_zero));
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if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
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return (EADDRNOTAVAIL);
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}
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laddr = sin->sin_addr;
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if (lport) {
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struct inpcb *t;
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/* GROSS */
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if (ntohs(lport) <= ipport_reservedhigh &&
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ntohs(lport) >= ipport_reservedlow &&
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td && suser_cred(td->td_ucred, PRISON_ROOT))
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return (EACCES);
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if (td && jailed(td->td_ucred))
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prison = 1;
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if (so->so_cred->cr_uid != 0 &&
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!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
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t = in_pcblookup_local(inp->inp_pcbinfo,
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sin->sin_addr, lport,
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prison ? 0 : INPLOOKUP_WILDCARD);
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/*
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* XXX
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* This entire block sorely needs a rewrite.
|
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*/
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if (t && (t->inp_vflag & INP_TIMEWAIT)) {
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if ((ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
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ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
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(intotw(t)->tw_so_options & SO_REUSEPORT) == 0) &&
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(so->so_cred->cr_uid != intotw(t)->tw_cred->cr_uid))
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return (EADDRINUSE);
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} else
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if (t &&
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(ntohl(sin->sin_addr.s_addr) != INADDR_ANY ||
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ntohl(t->inp_laddr.s_addr) != INADDR_ANY ||
|
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(t->inp_socket->so_options &
|
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SO_REUSEPORT) == 0) &&
|
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(so->so_cred->cr_uid !=
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t->inp_socket->so_cred->cr_uid)) {
|
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#if defined(INET6)
|
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if (ntohl(sin->sin_addr.s_addr) !=
|
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INADDR_ANY ||
|
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ntohl(t->inp_laddr.s_addr) !=
|
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INADDR_ANY ||
|
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INP_SOCKAF(so) ==
|
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INP_SOCKAF(t->inp_socket))
|
|
#endif /* defined(INET6) */
|
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return (EADDRINUSE);
|
|
}
|
|
}
|
|
if (prison &&
|
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prison_ip(td->td_ucred, 0, &sin->sin_addr.s_addr))
|
|
return (EADDRNOTAVAIL);
|
|
t = in_pcblookup_local(pcbinfo, sin->sin_addr,
|
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lport, prison ? 0 : wild);
|
|
if (t && (t->inp_vflag & INP_TIMEWAIT)) {
|
|
if ((reuseport & intotw(t)->tw_so_options) == 0)
|
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return (EADDRINUSE);
|
|
} else
|
|
if (t &&
|
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(reuseport & t->inp_socket->so_options) == 0) {
|
|
#if defined(INET6)
|
|
if (ntohl(sin->sin_addr.s_addr) !=
|
|
INADDR_ANY ||
|
|
ntohl(t->inp_laddr.s_addr) !=
|
|
INADDR_ANY ||
|
|
INP_SOCKAF(so) ==
|
|
INP_SOCKAF(t->inp_socket))
|
|
#endif /* defined(INET6) */
|
|
return (EADDRINUSE);
|
|
}
|
|
}
|
|
}
|
|
if (*lportp != 0)
|
|
lport = *lportp;
|
|
if (lport == 0) {
|
|
u_short first, last;
|
|
int count;
|
|
|
|
if (laddr.s_addr != INADDR_ANY)
|
|
if (prison_ip(td->td_ucred, 0, &laddr.s_addr))
|
|
return (EINVAL);
|
|
|
|
if (inp->inp_flags & INP_HIGHPORT) {
|
|
first = ipport_hifirstauto; /* sysctl */
|
|
last = ipport_hilastauto;
|
|
lastport = &pcbinfo->lasthi;
|
|
} else if (inp->inp_flags & INP_LOWPORT) {
|
|
if (td && (error = suser_cred(td->td_ucred,
|
|
PRISON_ROOT)) != 0)
|
|
return error;
|
|
first = ipport_lowfirstauto; /* 1023 */
|
|
last = ipport_lowlastauto; /* 600 */
|
|
lastport = &pcbinfo->lastlow;
|
|
} else {
|
|
first = ipport_firstauto; /* sysctl */
|
|
last = ipport_lastauto;
|
|
lastport = &pcbinfo->lastport;
|
|
}
|
|
/*
|
|
* Simple check to ensure all ports are not used up causing
|
|
* a deadlock here.
|
|
*
|
|
* We split the two cases (up and down) so that the direction
|
|
* is not being tested on each round of the loop.
|
|
*/
|
|
if (first > last) {
|
|
/*
|
|
* counting down
|
|
*/
|
|
count = first - last;
|
|
|
|
do {
|
|
if (count-- < 0) /* completely used? */
|
|
return (EADDRNOTAVAIL);
|
|
--*lastport;
|
|
if (*lastport > first || *lastport < last)
|
|
*lastport = first;
|
|
lport = htons(*lastport);
|
|
} while (in_pcblookup_local(pcbinfo, laddr, lport,
|
|
wild));
|
|
} else {
|
|
/*
|
|
* counting up
|
|
*/
|
|
count = last - first;
|
|
|
|
do {
|
|
if (count-- < 0) /* completely used? */
|
|
return (EADDRNOTAVAIL);
|
|
++*lastport;
|
|
if (*lastport < first || *lastport > last)
|
|
*lastport = first;
|
|
lport = htons(*lastport);
|
|
} while (in_pcblookup_local(pcbinfo, laddr, lport,
|
|
wild));
|
|
}
|
|
}
|
|
if (prison_ip(td->td_ucred, 0, &laddr.s_addr))
|
|
return (EINVAL);
|
|
*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(inp, nam, td)
|
|
register struct inpcb *inp;
|
|
struct sockaddr *nam;
|
|
struct thread *td;
|
|
{
|
|
u_short lport, fport;
|
|
in_addr_t laddr, faddr;
|
|
int anonport, error;
|
|
|
|
lport = inp->inp_lport;
|
|
laddr = inp->inp_laddr.s_addr;
|
|
anonport = (lport == 0);
|
|
error = in_pcbconnect_setup(inp, nam, &laddr, &lport, &faddr, &fport,
|
|
NULL, td);
|
|
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(inp);
|
|
#ifdef IPSEC
|
|
if (inp->inp_socket->so_type == SOCK_STREAM)
|
|
ipsec_pcbconn(inp->inp_sp);
|
|
#endif
|
|
if (anonport)
|
|
inp->inp_flags |= INP_ANONPORT;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 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(inp, nam, laddrp, lportp, faddrp, fportp, oinpp, td)
|
|
register struct inpcb *inp;
|
|
struct sockaddr *nam;
|
|
in_addr_t *laddrp;
|
|
u_short *lportp;
|
|
in_addr_t *faddrp;
|
|
u_short *fportp;
|
|
struct inpcb **oinpp;
|
|
struct thread *td;
|
|
{
|
|
struct sockaddr_in *sin = (struct sockaddr_in *)nam;
|
|
struct in_ifaddr *ia;
|
|
struct sockaddr_in sa;
|
|
struct ucred *cred;
|
|
struct inpcb *oinp;
|
|
struct in_addr laddr, faddr;
|
|
u_short lport, fport;
|
|
int error;
|
|
|
|
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;
|
|
cred = inp->inp_socket->so_cred;
|
|
if (laddr.s_addr == INADDR_ANY && jailed(cred)) {
|
|
bzero(&sa, sizeof(sa));
|
|
sa.sin_addr.s_addr = htonl(prison_getip(cred));
|
|
sa.sin_len = sizeof(sa);
|
|
sa.sin_family = AF_INET;
|
|
error = in_pcbbind_setup(inp, (struct sockaddr *)&sa,
|
|
&laddr.s_addr, &lport, td);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
if (!TAILQ_EMPTY(&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)
|
|
faddr = IA_SIN(TAILQ_FIRST(&in_ifaddrhead))->sin_addr;
|
|
else if (faddr.s_addr == (u_long)INADDR_BROADCAST &&
|
|
(TAILQ_FIRST(&in_ifaddrhead)->ia_ifp->if_flags &
|
|
IFF_BROADCAST))
|
|
faddr = satosin(&TAILQ_FIRST(
|
|
&in_ifaddrhead)->ia_broadaddr)->sin_addr;
|
|
}
|
|
if (laddr.s_addr == INADDR_ANY) {
|
|
struct route sro;
|
|
|
|
bzero(&sro, sizeof(sro));
|
|
ia = (struct in_ifaddr *)0;
|
|
/*
|
|
* If route is known our src addr is taken from the i/f,
|
|
* else punt.
|
|
*/
|
|
if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0) {
|
|
/* Find out route to destination */
|
|
sro.ro_dst.sa_family = AF_INET;
|
|
sro.ro_dst.sa_len = sizeof(struct sockaddr_in);
|
|
((struct sockaddr_in *)&sro.ro_dst)->sin_addr = faddr;
|
|
rtalloc_ign(&sro, RTF_CLONING);
|
|
}
|
|
/*
|
|
* If we found a route, use the address
|
|
* corresponding to the outgoing interface
|
|
* unless it is the loopback (in case a route
|
|
* to our address on another net goes to loopback).
|
|
*/
|
|
if (sro.ro_rt && !(sro.ro_rt->rt_ifp->if_flags & IFF_LOOPBACK))
|
|
ia = ifatoia(sro.ro_rt->rt_ifa);
|
|
if (sro.ro_rt)
|
|
RTFREE(sro.ro_rt);
|
|
if (ia == 0) {
|
|
bzero(&sa, sizeof(sa));
|
|
sa.sin_addr = faddr;
|
|
sa.sin_len = sizeof(sa);
|
|
sa.sin_family = AF_INET;
|
|
|
|
ia = ifatoia(ifa_ifwithdstaddr(sintosa(&sa)));
|
|
if (ia == 0)
|
|
ia = ifatoia(ifa_ifwithnet(sintosa(&sa)));
|
|
if (ia == 0)
|
|
ia = TAILQ_FIRST(&in_ifaddrhead);
|
|
if (ia == 0)
|
|
return (EADDRNOTAVAIL);
|
|
}
|
|
/*
|
|
* If the destination address is multicast and an outgoing
|
|
* interface has been set as a multicast option, use 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;
|
|
TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link)
|
|
if (ia->ia_ifp == ifp)
|
|
break;
|
|
if (ia == 0)
|
|
return (EADDRNOTAVAIL);
|
|
}
|
|
}
|
|
laddr = ia->ia_addr.sin_addr;
|
|
}
|
|
|
|
oinp = in_pcblookup_hash(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, td);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
*laddrp = laddr.s_addr;
|
|
*lportp = lport;
|
|
*faddrp = faddr.s_addr;
|
|
*fportp = fport;
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
in_pcbdisconnect(inp)
|
|
struct inpcb *inp;
|
|
{
|
|
INP_LOCK_ASSERT(inp);
|
|
|
|
inp->inp_faddr.s_addr = INADDR_ANY;
|
|
inp->inp_fport = 0;
|
|
in_pcbrehash(inp);
|
|
#ifdef IPSEC
|
|
ipsec_pcbdisconn(inp->inp_sp);
|
|
#endif
|
|
if (inp->inp_socket->so_state & SS_NOFDREF)
|
|
in_pcbdetach(inp);
|
|
}
|
|
|
|
void
|
|
in_pcbdetach(inp)
|
|
struct inpcb *inp;
|
|
{
|
|
struct socket *so = inp->inp_socket;
|
|
struct inpcbinfo *ipi = inp->inp_pcbinfo;
|
|
|
|
INP_LOCK_ASSERT(inp);
|
|
|
|
#if defined(IPSEC) || defined(FAST_IPSEC)
|
|
ipsec4_delete_pcbpolicy(inp);
|
|
#endif /*IPSEC*/
|
|
inp->inp_gencnt = ++ipi->ipi_gencnt;
|
|
in_pcbremlists(inp);
|
|
if (so) {
|
|
so->so_pcb = 0;
|
|
sotryfree(so);
|
|
}
|
|
if (inp->inp_options)
|
|
(void)m_free(inp->inp_options);
|
|
ip_freemoptions(inp->inp_moptions);
|
|
inp->inp_vflag = 0;
|
|
INP_LOCK_DESTROY(inp);
|
|
#ifdef MAC
|
|
mac_destroy_inpcb(inp);
|
|
#endif
|
|
uma_zfree(ipi->ipi_zone, inp);
|
|
}
|
|
|
|
struct sockaddr *
|
|
in_sockaddr(port, addr_p)
|
|
in_port_t port;
|
|
struct in_addr *addr_p;
|
|
{
|
|
struct sockaddr_in *sin;
|
|
|
|
MALLOC(sin, struct sockaddr_in *, 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;
|
|
}
|
|
|
|
/*
|
|
* The wrapper function will pass down the pcbinfo for this function to lock.
|
|
* The socket must have a valid
|
|
* (i.e., non-nil) PCB, but it should be impossible to get an invalid one
|
|
* except through a kernel programming error, so it is acceptable to panic
|
|
* (or in this case trap) if the PCB is invalid. (Actually, we don't trap
|
|
* because there actually /is/ a programming error somewhere... XXX)
|
|
*/
|
|
int
|
|
in_setsockaddr(so, nam, pcbinfo)
|
|
struct socket *so;
|
|
struct sockaddr **nam;
|
|
struct inpcbinfo *pcbinfo;
|
|
{
|
|
int s;
|
|
register struct inpcb *inp;
|
|
struct in_addr addr;
|
|
in_port_t port;
|
|
|
|
s = splnet();
|
|
INP_INFO_RLOCK(pcbinfo);
|
|
inp = sotoinpcb(so);
|
|
if (!inp) {
|
|
INP_INFO_RUNLOCK(pcbinfo);
|
|
splx(s);
|
|
return ECONNRESET;
|
|
}
|
|
INP_LOCK(inp);
|
|
port = inp->inp_lport;
|
|
addr = inp->inp_laddr;
|
|
INP_UNLOCK(inp);
|
|
INP_INFO_RUNLOCK(pcbinfo);
|
|
splx(s);
|
|
|
|
*nam = in_sockaddr(port, &addr);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The wrapper function will pass down the pcbinfo for this function to lock.
|
|
*/
|
|
int
|
|
in_setpeeraddr(so, nam, pcbinfo)
|
|
struct socket *so;
|
|
struct sockaddr **nam;
|
|
struct inpcbinfo *pcbinfo;
|
|
{
|
|
int s;
|
|
register struct inpcb *inp;
|
|
struct in_addr addr;
|
|
in_port_t port;
|
|
|
|
s = splnet();
|
|
INP_INFO_RLOCK(pcbinfo);
|
|
inp = sotoinpcb(so);
|
|
if (!inp) {
|
|
INP_INFO_RUNLOCK(pcbinfo);
|
|
splx(s);
|
|
return ECONNRESET;
|
|
}
|
|
INP_LOCK(inp);
|
|
port = inp->inp_fport;
|
|
addr = inp->inp_faddr;
|
|
INP_UNLOCK(inp);
|
|
INP_INFO_RUNLOCK(pcbinfo);
|
|
splx(s);
|
|
|
|
*nam = in_sockaddr(port, &addr);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
in_pcbnotifyall(pcbinfo, faddr, errno, notify)
|
|
struct inpcbinfo *pcbinfo;
|
|
struct in_addr faddr;
|
|
int errno;
|
|
struct inpcb *(*notify)(struct inpcb *, int);
|
|
{
|
|
struct inpcb *inp, *ninp;
|
|
struct inpcbhead *head;
|
|
int s;
|
|
|
|
s = splnet();
|
|
INP_INFO_WLOCK(pcbinfo);
|
|
head = pcbinfo->listhead;
|
|
for (inp = LIST_FIRST(head); inp != NULL; inp = ninp) {
|
|
INP_LOCK(inp);
|
|
ninp = LIST_NEXT(inp, inp_list);
|
|
#ifdef INET6
|
|
if ((inp->inp_vflag & INP_IPV4) == 0) {
|
|
INP_UNLOCK(inp);
|
|
continue;
|
|
}
|
|
#endif
|
|
if (inp->inp_faddr.s_addr != faddr.s_addr ||
|
|
inp->inp_socket == NULL) {
|
|
INP_UNLOCK(inp);
|
|
continue;
|
|
}
|
|
if ((*notify)(inp, errno))
|
|
INP_UNLOCK(inp);
|
|
}
|
|
INP_INFO_WUNLOCK(pcbinfo);
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
in_pcbpurgeif0(pcbinfo, ifp)
|
|
struct inpcbinfo *pcbinfo;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct inpcb *inp;
|
|
struct ip_moptions *imo;
|
|
int i, gap;
|
|
|
|
/* why no splnet here? XXX */
|
|
INP_INFO_RLOCK(pcbinfo);
|
|
LIST_FOREACH(inp, pcbinfo->listhead, inp_list) {
|
|
INP_LOCK(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_UNLOCK(inp);
|
|
}
|
|
INP_INFO_RUNLOCK(pcbinfo);
|
|
}
|
|
|
|
/*
|
|
* Lookup a PCB based on the local address and port.
|
|
*/
|
|
struct inpcb *
|
|
in_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay)
|
|
struct inpcbinfo *pcbinfo;
|
|
struct in_addr laddr;
|
|
u_int lport_arg;
|
|
int wild_okay;
|
|
{
|
|
register struct inpcb *inp;
|
|
int matchwild = 3, wildcard;
|
|
u_short lport = lport_arg;
|
|
|
|
INP_INFO_WLOCK_ASSERT(pcbinfo);
|
|
|
|
if (!wild_okay) {
|
|
struct inpcbhead *head;
|
|
/*
|
|
* Look for an unconnected (wildcard foreign addr) PCB that
|
|
* matches the local address and port we're looking for.
|
|
*/
|
|
head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, pcbinfo->hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
#ifdef INET6
|
|
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.
|
|
*/
|
|
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.
|
|
*/
|
|
retrylookup:
|
|
porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport,
|
|
pcbinfo->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;
|
|
#ifdef INET6
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
|
continue;
|
|
#endif
|
|
/*
|
|
* Clean out old time_wait sockets if they
|
|
* are clogging up needed local ports.
|
|
*/
|
|
if ((inp->inp_vflag & INP_TIMEWAIT) != 0) {
|
|
if (tcp_twrecycleable((struct tcptw *)inp->inp_ppcb)) {
|
|
INP_LOCK(inp);
|
|
tcp_twclose((struct tcptw *)inp->inp_ppcb, 0);
|
|
match = NULL;
|
|
goto retrylookup;
|
|
}
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Lookup PCB in hash list.
|
|
*/
|
|
struct inpcb *
|
|
in_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard,
|
|
ifp)
|
|
struct inpcbinfo *pcbinfo;
|
|
struct in_addr faddr, laddr;
|
|
u_int fport_arg, lport_arg;
|
|
int wildcard;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct inpcbhead *head;
|
|
register struct inpcb *inp;
|
|
u_short fport = fport_arg, lport = lport_arg;
|
|
|
|
INP_INFO_RLOCK_ASSERT(pcbinfo);
|
|
/*
|
|
* First look for an exact match.
|
|
*/
|
|
head = &pcbinfo->hashbase[INP_PCBHASH(faddr.s_addr, lport, fport, pcbinfo->hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
#ifdef INET6
|
|
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) {
|
|
/*
|
|
* Found.
|
|
*/
|
|
return (inp);
|
|
}
|
|
}
|
|
if (wildcard) {
|
|
struct inpcb *local_wild = NULL;
|
|
#if defined(INET6)
|
|
struct inpcb *local_wild_mapped = NULL;
|
|
#endif /* defined(INET6) */
|
|
|
|
head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, pcbinfo->hashmask)];
|
|
LIST_FOREACH(inp, head, inp_hash) {
|
|
#ifdef INET6
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
|
continue;
|
|
#endif
|
|
if (inp->inp_faddr.s_addr == INADDR_ANY &&
|
|
inp->inp_lport == lport) {
|
|
if (ifp && ifp->if_type == IFT_FAITH &&
|
|
(inp->inp_flags & INP_FAITH) == 0)
|
|
continue;
|
|
if (inp->inp_laddr.s_addr == laddr.s_addr)
|
|
return (inp);
|
|
else if (inp->inp_laddr.s_addr == INADDR_ANY) {
|
|
#if defined(INET6)
|
|
if (INP_CHECK_SOCKAF(inp->inp_socket,
|
|
AF_INET6))
|
|
local_wild_mapped = inp;
|
|
else
|
|
#endif /* defined(INET6) */
|
|
local_wild = inp;
|
|
}
|
|
}
|
|
}
|
|
#if defined(INET6)
|
|
if (local_wild == NULL)
|
|
return (local_wild_mapped);
|
|
#endif /* defined(INET6) */
|
|
return (local_wild);
|
|
}
|
|
|
|
/*
|
|
* Not found.
|
|
*/
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Insert PCB onto various hash lists.
|
|
*/
|
|
int
|
|
in_pcbinshash(inp)
|
|
struct inpcb *inp;
|
|
{
|
|
struct inpcbhead *pcbhash;
|
|
struct inpcbporthead *pcbporthash;
|
|
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
|
|
struct inpcbport *phd;
|
|
u_int32_t hashkey_faddr;
|
|
|
|
INP_INFO_WLOCK_ASSERT(pcbinfo);
|
|
#ifdef INET6
|
|
if (inp->inp_vflag & INP_IPV6)
|
|
hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
|
|
else
|
|
#endif /* INET6 */
|
|
hashkey_faddr = inp->inp_faddr.s_addr;
|
|
|
|
pcbhash = &pcbinfo->hashbase[INP_PCBHASH(hashkey_faddr,
|
|
inp->inp_lport, inp->inp_fport, pcbinfo->hashmask)];
|
|
|
|
pcbporthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(inp->inp_lport,
|
|
pcbinfo->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) {
|
|
MALLOC(phd, struct inpcbport *, 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);
|
|
return (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(inp)
|
|
struct inpcb *inp;
|
|
{
|
|
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
|
|
struct inpcbhead *head;
|
|
u_int32_t hashkey_faddr;
|
|
|
|
INP_INFO_WLOCK_ASSERT(pcbinfo);
|
|
/* XXX? INP_LOCK_ASSERT(inp); */
|
|
#ifdef INET6
|
|
if (inp->inp_vflag & INP_IPV6)
|
|
hashkey_faddr = inp->in6p_faddr.s6_addr32[3] /* XXX */;
|
|
else
|
|
#endif /* INET6 */
|
|
hashkey_faddr = inp->inp_faddr.s_addr;
|
|
|
|
head = &pcbinfo->hashbase[INP_PCBHASH(hashkey_faddr,
|
|
inp->inp_lport, inp->inp_fport, pcbinfo->hashmask)];
|
|
|
|
LIST_REMOVE(inp, inp_hash);
|
|
LIST_INSERT_HEAD(head, inp, inp_hash);
|
|
}
|
|
|
|
/*
|
|
* Remove PCB from various lists.
|
|
*/
|
|
void
|
|
in_pcbremlists(inp)
|
|
struct inpcb *inp;
|
|
{
|
|
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
|
|
|
|
INP_INFO_WLOCK_ASSERT(pcbinfo);
|
|
INP_LOCK_ASSERT(inp);
|
|
|
|
inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
|
|
if (inp->inp_lport) {
|
|
struct inpcbport *phd = inp->inp_phd;
|
|
|
|
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);
|
|
}
|
|
}
|
|
LIST_REMOVE(inp, inp_list);
|
|
pcbinfo->ipi_count--;
|
|
}
|
|
|
|
/*
|
|
* A set label operation has occurred at the socket layer, propagate the
|
|
* label change into the in_pcb for the socket.
|
|
*/
|
|
void
|
|
in_pcbsosetlabel(so)
|
|
struct socket *so;
|
|
{
|
|
#ifdef MAC
|
|
struct inpcb *inp;
|
|
|
|
/* XXX: Will assert socket lock when we have them. */
|
|
inp = (struct inpcb *)so->so_pcb;
|
|
INP_LOCK(inp);
|
|
mac_inpcb_sosetlabel(so, inp);
|
|
INP_UNLOCK(inp);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
prison_xinpcb(struct thread *td, struct inpcb *inp)
|
|
{
|
|
if (!jailed(td->td_ucred))
|
|
return (0);
|
|
if (ntohl(inp->inp_laddr.s_addr) == prison_getip(td->td_ucred))
|
|
return (0);
|
|
return (1);
|
|
}
|