d907e70991
bad under high load. For example with 40k sockets and 25k tcptw entries, connect() syscall can run for seconds. Debugging showed that it iterates the cycle millions times and purges thousands of tcptw entries at a time. Besides practical unusability this change is architecturally wrong. First, in_pcblookup_local() is used in connect() and bind() syscalls. No stale entries purging shouldn't be done here. Second, it is a layering violation. o Return back the tcptw purging cycle to tcp_timer_2msl_tw(), that was removed in rev. 1.78 by rwatson. The commit log of this revision tells nothing about the reason cycle was removed. Now we need this cycle, since major cleaner of stale tcptw structures is removed. o Disable probably necessary, but now unused tcp_twrecycleable() function. Reviewed by: ru
1233 lines
33 KiB
C
1233 lines
33 KiB
C
/*-
|
|
* Copyright (c) 1982, 1986, 1991, 1993, 1995
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_ipsec.h"
|
|
#include "opt_inet6.h"
|
|
#include "opt_mac.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mac.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/domain.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/jail.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <vm/uma.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_types.h>
|
|
#include <net/route.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_pcb.h>
|
|
#include <netinet/in_var.h>
|
|
#include <netinet/ip_var.h>
|
|
#include <netinet/tcp_var.h>
|
|
#include <netinet/udp.h>
|
|
#include <netinet/udp_var.h>
|
|
#ifdef INET6
|
|
#include <netinet/ip6.h>
|
|
#include <netinet6/ip6_var.h>
|
|
#endif /* INET6 */
|
|
|
|
#ifdef IPSEC
|
|
#include <netinet6/ipsec.h>
|
|
#include <netkey/key.h>
|
|
#endif /* IPSEC */
|
|
|
|
#ifdef FAST_IPSEC
|
|
#if defined(IPSEC) || defined(IPSEC_ESP)
|
|
#error "Bad idea: don't compile with both IPSEC and FAST_IPSEC!"
|
|
#endif
|
|
|
|
#include <netipsec/ipsec.h>
|
|
#include <netipsec/key.h>
|
|
#endif /* FAST_IPSEC */
|
|
|
|
/*
|
|
* These configure the range of local port addresses assigned to
|
|
* "unspecified" outgoing connections/packets/whatever.
|
|
*/
|
|
int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
|
|
int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
|
|
int ipport_firstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
|
|
int ipport_lastauto = IPPORT_HILASTAUTO; /* 65535 */
|
|
int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 49152 */
|
|
int ipport_hilastauto = IPPORT_HILASTAUTO; /* 65535 */
|
|
|
|
/*
|
|
* Reserved ports accessible only to root. There are significant
|
|
* security considerations that must be accounted for when changing these,
|
|
* but the security benefits can be great. Please be careful.
|
|
*/
|
|
int ipport_reservedhigh = IPPORT_RESERVED - 1; /* 1023 */
|
|
int ipport_reservedlow = 0;
|
|
|
|
/* Variables dealing with random ephemeral port allocation. */
|
|
int ipport_randomized = 1; /* user controlled via sysctl */
|
|
int ipport_randomcps = 10; /* user controlled via sysctl */
|
|
int ipport_randomtime = 45; /* user controlled via sysctl */
|
|
int ipport_stoprandom = 0; /* toggled by ipport_tick */
|
|
int ipport_tcpallocs;
|
|
int ipport_tcplastcount;
|
|
|
|
#define RANGECHK(var, min, max) \
|
|
if ((var) < (min)) { (var) = (min); } \
|
|
else if ((var) > (max)) { (var) = (max); }
|
|
|
|
static int
|
|
sysctl_net_ipport_check(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error;
|
|
|
|
error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
|
|
if (error == 0) {
|
|
RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
|
|
RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
|
|
RANGECHK(ipport_firstauto, IPPORT_RESERVED, IPPORT_MAX);
|
|
RANGECHK(ipport_lastauto, IPPORT_RESERVED, IPPORT_MAX);
|
|
RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, IPPORT_MAX);
|
|
RANGECHK(ipport_hilastauto, IPPORT_RESERVED, IPPORT_MAX);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#undef RANGECHK
|
|
|
|
SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
|
|
|
|
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
|
|
&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", "");
|
|
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
|
|
&ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
|
|
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
|
|
&ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
|
|
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, "");
|
|
SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomized, CTLFLAG_RW,
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|
&ipport_randomized, 0, "Enable random port allocation");
|
|
SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomcps, CTLFLAG_RW,
|
|
&ipport_randomcps, 0, "Maximum number of random port "
|
|
"allocations before switching to a sequental one");
|
|
SYSCTL_INT(_net_inet_ip_portrange, OID_AUTO, randomtime, CTLFLAG_RW,
|
|
&ipport_randomtime, 0, "Minimum time to keep sequental port "
|
|
"allocation before switching to a random one");
|
|
|
|
/*
|
|
* in_pcb.c: manage the Protocol Control Blocks.
|
|
*
|
|
* NOTE: It is assumed that most of these functions will be called with
|
|
* the pcbinfo lock held, and often, the inpcb lock held, as these utility
|
|
* functions often modify hash chains or addresses in pcbs.
|
|
*/
|
|
|
|
/*
|
|
* 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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|
{
|
|
struct inpcb *inp;
|
|
int error;
|
|
|
|
INP_INFO_WLOCK_ASSERT(pcbinfo);
|
|
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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|
#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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|
SOCK_LOCK(so);
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|
mac_create_inpcb_from_socket(so, inp);
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|
SOCK_UNLOCK(so);
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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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|
}
|
|
#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;
|
|
#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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|
INP_LOCK(inp);
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|
inp->inp_gencnt = ++pcbinfo->ipi_gencnt;
|
|
|
|
#if defined(IPSEC) || defined(FAST_IPSEC) || defined(MAC)
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|
out:
|
|
if (error != 0)
|
|
uma_zfree(pcbinfo->ipi_zone, inp);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
in_pcbbind(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
|
|
{
|
|
int anonport, error;
|
|
|
|
INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
|
|
INP_LOCK_ASSERT(inp);
|
|
|
|
if (inp->inp_lport != 0 || inp->inp_laddr.s_addr != INADDR_ANY)
|
|
return (EINVAL);
|
|
anonport = inp->inp_lport == 0 && (nam == NULL ||
|
|
((struct sockaddr_in *)nam)->sin_port == 0);
|
|
error = in_pcbbind_setup(inp, nam, &inp->inp_laddr.s_addr,
|
|
&inp->inp_lport, cred);
|
|
if (error)
|
|
return (error);
|
|
if (in_pcbinshash(inp) != 0) {
|
|
inp->inp_laddr.s_addr = INADDR_ANY;
|
|
inp->inp_lport = 0;
|
|
return (EAGAIN);
|
|
}
|
|
if (anonport)
|
|
inp->inp_flags |= INP_ANONPORT;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
unsigned short *lastport;
|
|
struct sockaddr_in *sin;
|
|
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
|
|
struct in_addr laddr;
|
|
u_short lport = 0;
|
|
int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
|
|
int error, prison = 0;
|
|
int dorandom;
|
|
|
|
INP_INFO_WLOCK_ASSERT(pcbinfo);
|
|
INP_LOCK_ASSERT(inp);
|
|
|
|
if (TAILQ_EMPTY(&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)
|
|
wild = INPLOOKUP_WILDCARD;
|
|
if (nam) {
|
|
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
|
|
if (sin->sin_addr.s_addr != INADDR_ANY)
|
|
if (prison_ip(cred, 0, &sin->sin_addr.s_addr))
|
|
return(EINVAL);
|
|
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)
|
|
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));
|
|
if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
|
|
return (EADDRNOTAVAIL);
|
|
}
|
|
laddr = sin->sin_addr;
|
|
if (lport) {
|
|
struct inpcb *t;
|
|
struct tcptw *tw;
|
|
|
|
/* GROSS */
|
|
if (ntohs(lport) <= ipport_reservedhigh &&
|
|
ntohs(lport) >= ipport_reservedlow &&
|
|
suser_cred(cred, SUSER_ALLOWJAIL))
|
|
return (EACCES);
|
|
if (jailed(cred))
|
|
prison = 1;
|
|
if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
|
|
suser_cred(so->so_cred, SUSER_ALLOWJAIL) != 0) {
|
|
t = in_pcblookup_local(inp->inp_pcbinfo,
|
|
sin->sin_addr, lport,
|
|
prison ? 0 : INPLOOKUP_WILDCARD);
|
|
/*
|
|
* XXX
|
|
* This entire block sorely needs a rewrite.
|
|
*/
|
|
if (t &&
|
|
((t->inp_vflag & 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_socket->so_options &
|
|
SO_REUSEPORT) == 0) &&
|
|
(so->so_cred->cr_uid !=
|
|
t->inp_socket->so_cred->cr_uid))
|
|
return (EADDRINUSE);
|
|
}
|
|
if (prison && prison_ip(cred, 0, &sin->sin_addr.s_addr))
|
|
return (EADDRNOTAVAIL);
|
|
t = in_pcblookup_local(pcbinfo, sin->sin_addr,
|
|
lport, prison ? 0 : wild);
|
|
if (t && (t->inp_vflag & 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(inp);
|
|
if (tw == NULL ||
|
|
(reuseport & tw->tw_so_options) == 0)
|
|
return (EADDRINUSE);
|
|
} else if (t &&
|
|
(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(cred, 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 ((error = suser_cred(cred, SUSER_ALLOWJAIL)) != 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;
|
|
}
|
|
/*
|
|
* For UDP, 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 (ipport_randomized &&
|
|
(!ipport_stoprandom || pcbinfo == &udbinfo))
|
|
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 packets in the count. */
|
|
if (pcbinfo != &udbinfo)
|
|
ipport_tcpallocs++;
|
|
/*
|
|
* 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
|
|
*/
|
|
if (dorandom)
|
|
*lastport = first -
|
|
(arc4random() % (first - last));
|
|
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
|
|
*/
|
|
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);
|
|
} while (in_pcblookup_local(pcbinfo, laddr, lport,
|
|
wild));
|
|
}
|
|
}
|
|
if (prison_ip(cred, 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(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred)
|
|
{
|
|
u_short lport, fport;
|
|
in_addr_t laddr, faddr;
|
|
int anonport, error;
|
|
|
|
INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
|
|
INP_LOCK_ASSERT(inp);
|
|
|
|
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(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(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 sockaddr_in *sin = (struct sockaddr_in *)nam;
|
|
struct in_ifaddr *ia;
|
|
struct sockaddr_in sa;
|
|
struct ucred *socred;
|
|
struct inpcb *oinp;
|
|
struct in_addr laddr, faddr;
|
|
u_short lport, fport;
|
|
int error;
|
|
|
|
INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
|
|
INP_LOCK_ASSERT(inp);
|
|
|
|
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;
|
|
socred = inp->inp_socket->so_cred;
|
|
if (laddr.s_addr == INADDR_ANY && jailed(socred)) {
|
|
bzero(&sa, sizeof(sa));
|
|
sa.sin_addr.s_addr = htonl(prison_getip(socred));
|
|
sa.sin_len = sizeof(sa);
|
|
sa.sin_family = AF_INET;
|
|
error = in_pcbbind_setup(inp, (struct sockaddr *)&sa,
|
|
&laddr.s_addr, &lport, cred);
|
|
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) {
|
|
ia = (struct in_ifaddr *)0;
|
|
/*
|
|
* 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)
|
|
ia = ip_rtaddr(faddr);
|
|
/*
|
|
* 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 (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)
|
|
return (ENETUNREACH);
|
|
}
|
|
/*
|
|
* 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,
|
|
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_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
|
|
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
|
|
}
|
|
|
|
/*
|
|
* In the old world order, in_pcbdetach() served two functions: to detach the
|
|
* pcb from the socket/potentially free the socket, and to free the pcb
|
|
* itself. In the new world order, the protocol code is responsible for
|
|
* managing the relationship with the socket, and this code simply frees the
|
|
* pcb.
|
|
*/
|
|
void
|
|
in_pcbdetach(struct inpcb *inp)
|
|
{
|
|
|
|
KASSERT(inp->inp_socket != NULL, ("in_pcbdetach: inp_socket == NULL"));
|
|
inp->inp_socket->so_pcb = NULL;
|
|
inp->inp_socket = NULL;
|
|
}
|
|
|
|
void
|
|
in_pcbfree(struct inpcb *inp)
|
|
{
|
|
struct inpcbinfo *ipi = inp->inp_pcbinfo;
|
|
|
|
KASSERT(inp->inp_socket == NULL, ("in_pcbfree: inp_socket != NULL"));
|
|
INP_INFO_WLOCK_ASSERT(ipi);
|
|
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 (inp->inp_options)
|
|
(void)m_free(inp->inp_options);
|
|
ip_freemoptions(inp->inp_moptions);
|
|
inp->inp_vflag = 0;
|
|
|
|
#ifdef MAC
|
|
mac_destroy_inpcb(inp);
|
|
#endif
|
|
INP_UNLOCK(inp);
|
|
uma_zfree(ipi->ipi_zone, inp);
|
|
}
|
|
|
|
/*
|
|
* TCP needs to maintain its inpcb structure after the TCP connection has
|
|
* been torn down. However, it must be disconnected from the inpcb hashes as
|
|
* it must not prevent binding of future connections to the same port/ip
|
|
* combination by other inpcbs.
|
|
*/
|
|
void
|
|
in_pcbdrop(struct inpcb *inp)
|
|
{
|
|
|
|
INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
|
|
INP_LOCK_ASSERT(inp);
|
|
|
|
inp->inp_vflag |= INP_DROPPED;
|
|
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);
|
|
}
|
|
inp->inp_lport = 0;
|
|
}
|
|
}
|
|
|
|
struct sockaddr *
|
|
in_sockaddr(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(struct socket *so, struct sockaddr **nam,
|
|
struct inpcbinfo *pcbinfo)
|
|
{
|
|
struct inpcb *inp;
|
|
struct in_addr addr;
|
|
in_port_t port;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("in_setsockaddr: inp == NULL"));
|
|
|
|
INP_LOCK(inp);
|
|
port = inp->inp_lport;
|
|
addr = inp->inp_laddr;
|
|
INP_UNLOCK(inp);
|
|
|
|
*nam = in_sockaddr(port, &addr);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The wrapper function will pass down the pcbinfo for this function to lock.
|
|
*/
|
|
int
|
|
in_setpeeraddr(struct socket *so, struct sockaddr **nam,
|
|
struct inpcbinfo *pcbinfo)
|
|
{
|
|
struct inpcb *inp;
|
|
struct in_addr addr;
|
|
in_port_t port;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("in_setpeeraddr: inp == NULL"));
|
|
|
|
INP_LOCK(inp);
|
|
port = inp->inp_fport;
|
|
addr = inp->inp_faddr;
|
|
INP_UNLOCK(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, *ninp;
|
|
struct inpcbhead *head;
|
|
|
|
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);
|
|
}
|
|
|
|
void
|
|
in_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp)
|
|
{
|
|
struct inpcb *inp;
|
|
struct ip_moptions *imo;
|
|
int i, gap;
|
|
|
|
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.
|
|
*/
|
|
#define INP_LOOKUP_MAPPED_PCB_COST 3
|
|
struct inpcb *
|
|
in_pcblookup_local(struct inpcbinfo *pcbinfo, struct in_addr laddr,
|
|
u_int lport_arg, int wild_okay)
|
|
{
|
|
struct inpcb *inp;
|
|
#ifdef INET6
|
|
int matchwild = 3 + INP_LOOKUP_MAPPED_PCB_COST;
|
|
#else
|
|
int matchwild = 3;
|
|
#endif
|
|
int 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.
|
|
*/
|
|
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;
|
|
/*
|
|
* 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
|
|
|
|
/*
|
|
* Lookup PCB in hash list.
|
|
*/
|
|
struct inpcb *
|
|
in_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in_addr faddr,
|
|
u_int fport_arg, struct in_addr laddr, u_int lport_arg, int wildcard,
|
|
struct ifnet *ifp)
|
|
{
|
|
struct inpcbhead *head;
|
|
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(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);
|
|
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;
|
|
|
|
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(struct inpcb *inp)
|
|
{
|
|
struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
|
|
struct inpcbhead *head;
|
|
u_int32_t hashkey_faddr;
|
|
|
|
INP_INFO_WLOCK_ASSERT(pcbinfo);
|
|
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(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(struct socket *so)
|
|
{
|
|
#ifdef MAC
|
|
struct inpcb *inp;
|
|
|
|
inp = sotoinpcb(so);
|
|
KASSERT(inp != NULL, ("in_pcbsosetlabel: so->so_pcb == NULL"));
|
|
|
|
INP_LOCK(inp);
|
|
SOCK_LOCK(so);
|
|
mac_inpcb_sosetlabel(so, inp);
|
|
SOCK_UNLOCK(so);
|
|
INP_UNLOCK(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.
|
|
*/
|
|
void
|
|
ipport_tick(void *xtp)
|
|
{
|
|
|
|
if (ipport_tcpallocs <= ipport_tcplastcount + ipport_randomcps) {
|
|
if (ipport_stoprandom > 0)
|
|
ipport_stoprandom--;
|
|
} else
|
|
ipport_stoprandom = ipport_randomtime;
|
|
ipport_tcplastcount = ipport_tcpallocs;
|
|
callout_reset(&ipport_tick_callout, hz, ipport_tick, NULL);
|
|
}
|