File: [local] / sys / netinet / in_pcb.c (download)
Revision 1.1, Tue Mar 4 16:15:43 2008 UTC (16 years, 6 months ago) by nbrk
Branch point for: MAIN
Initial revision
|
/* $OpenBSD: in_pcb.c,v 1.89 2007/04/10 17:47:55 miod Exp $ */
/* $NetBSD: in_pcb.c,v 1.25 1996/02/13 23:41:53 christos Exp $ */
/*
* Copyright (c) 1982, 1986, 1991, 1993
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* 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.
*
* @(#)COPYRIGHT 1.1 (NRL) 17 January 1995
*
* NRL grants permission for redistribution and use in source and binary
* forms, with or without modification, of the software and documentation
* created at NRL 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgements:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* This product includes software developed at the Information
* Technology Division, US Naval Research Laboratory.
* 4. Neither the name of the NRL nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL 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 NRL 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.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies, either expressed or implied, of the US Naval
* Research Laboratory (NRL).
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/proc.h>
#include <sys/domain.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#include <dev/rndvar.h>
#include <sys/mount.h>
#include <nfs/nfsproto.h>
#ifdef INET6
#include <netinet6/ip6_var.h>
#endif /* INET6 */
#ifdef IPSEC
#include <netinet/ip_esp.h>
#endif /* IPSEC */
struct in_addr zeroin_addr;
extern int ipsec_auth_default_level;
extern int ipsec_esp_trans_default_level;
extern int ipsec_esp_network_default_level;
extern int ipsec_ipcomp_default_level;
/*
* These configure the range of local port addresses assigned to
* "unspecified" outgoing connections/packets/whatever.
*/
int ipport_firstauto = IPPORT_RESERVED;
int ipport_lastauto = IPPORT_USERRESERVED;
int ipport_hifirstauto = IPPORT_HIFIRSTAUTO;
int ipport_hilastauto = IPPORT_HILASTAUTO;
struct pool inpcb_pool;
int inpcb_pool_initalized = 0;
#define INPCBHASH(table, faddr, fport, laddr, lport) \
&(table)->inpt_hashtbl[(ntohl((faddr)->s_addr) + \
ntohs((fport)) + ntohs((lport))) & (table->inpt_hash)]
#define IN6PCBHASH(table, faddr, fport, laddr, lport) \
&(table)->inpt_hashtbl[(ntohl((faddr)->s6_addr32[0] ^ \
(faddr)->s6_addr32[3]) + ntohs((fport)) + ntohs((lport))) & \
(table->inpt_hash)]
#define INPCBLHASH(table, lport) \
&(table)->inpt_lhashtbl[lport & table->inpt_lhash]
void
in_pcbinit(table, hashsize)
struct inpcbtable *table;
int hashsize;
{
CIRCLEQ_INIT(&table->inpt_queue);
table->inpt_hashtbl = hashinit(hashsize, M_PCB, M_NOWAIT,
&table->inpt_hash);
if (table->inpt_hashtbl == NULL)
panic("in_pcbinit: hashinit failed");
table->inpt_lhashtbl = hashinit(hashsize, M_PCB, M_NOWAIT,
&table->inpt_lhash);
if (table->inpt_lhashtbl == NULL)
panic("in_pcbinit: hashinit failed for lport");
table->inpt_lastport = 0;
}
struct baddynamicports baddynamicports;
/*
* Check if the specified port is invalid for dynamic allocation.
*/
int
in_baddynamic(port, proto)
u_int16_t port;
u_int16_t proto;
{
switch (proto) {
case IPPROTO_TCP:
if (port == NFS_PORT)
return (1);
if (port < IPPORT_RESERVED/2 || port >= IPPORT_RESERVED)
return (0);
return (DP_ISSET(baddynamicports.tcp, port));
case IPPROTO_UDP:
#ifdef IPSEC
if (port == udpencap_port)
return (1);
#endif
if (port == NFS_PORT)
return (1);
if (port < IPPORT_RESERVED/2 || port >= IPPORT_RESERVED)
return (0);
return (DP_ISSET(baddynamicports.udp, port));
default:
return (0);
}
}
int
in_pcballoc(so, v)
struct socket *so;
void *v;
{
struct inpcbtable *table = v;
struct inpcb *inp;
int s;
if (inpcb_pool_initalized == 0) {
pool_init(&inpcb_pool, sizeof(struct inpcb), 0, 0, 0,
"inpcbpl", NULL);
inpcb_pool_initalized = 1;
}
inp = pool_get(&inpcb_pool, PR_NOWAIT);
if (inp == NULL)
return (ENOBUFS);
bzero((caddr_t)inp, sizeof(*inp));
inp->inp_table = table;
inp->inp_socket = so;
inp->inp_seclevel[SL_AUTH] = ipsec_auth_default_level;
inp->inp_seclevel[SL_ESP_TRANS] = ipsec_esp_trans_default_level;
inp->inp_seclevel[SL_ESP_NETWORK] = ipsec_esp_network_default_level;
inp->inp_seclevel[SL_IPCOMP] = ipsec_ipcomp_default_level;
s = splnet();
CIRCLEQ_INSERT_HEAD(&table->inpt_queue, inp, inp_queue);
LIST_INSERT_HEAD(INPCBLHASH(table, inp->inp_lport), inp, inp_lhash);
LIST_INSERT_HEAD(INPCBHASH(table, &inp->inp_faddr, inp->inp_fport,
&inp->inp_laddr, inp->inp_lport), inp, inp_hash);
splx(s);
so->so_pcb = inp;
inp->inp_hops = -1;
#ifdef INET6
/*
* Small change in this function to set the INP_IPV6 flag so routines
* outside pcb-specific routines don't need to use sotopf(), and all
* of its pointer chasing, later.
*/
if (sotopf(so) == PF_INET6)
inp->inp_flags = INP_IPV6;
inp->in6p_cksum = -1;
#endif /* INET6 */
return (0);
}
int
in_pcbbind(v, nam)
void *v;
struct mbuf *nam;
{
struct inpcb *inp = v;
struct socket *so = inp->inp_socket;
struct inpcbtable *table = inp->inp_table;
u_int16_t *lastport = &inp->inp_table->inpt_lastport;
struct sockaddr_in *sin;
struct proc *p = curproc; /* XXX */
u_int16_t lport = 0;
int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
int error;
#ifdef INET6
if (sotopf(so) == PF_INET6)
return in6_pcbbind(inp, nam);
#endif /* INET6 */
if (TAILQ_EMPTY(&in_ifaddr))
return (EADDRNOTAVAIL);
if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY)
return (EINVAL);
if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 &&
((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
(so->so_options & SO_ACCEPTCONN) == 0))
wild = INPLOOKUP_WILDCARD;
if (nam) {
sin = mtod(nam, struct sockaddr_in *);
if (nam->m_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
lport = sin->sin_port;
if (IN_MULTICAST(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... */
if (in_iawithaddr(sin->sin_addr, NULL) == 0)
return (EADDRNOTAVAIL);
}
if (lport) {
struct inpcb *t;
/* GROSS */
if (ntohs(lport) < IPPORT_RESERVED &&
(error = suser(p, 0)))
return (EACCES);
if (so->so_euid) {
t = in_pcblookup(table, &zeroin_addr, 0,
&sin->sin_addr, lport, INPLOOKUP_WILDCARD);
if (t && (so->so_euid != t->inp_socket->so_euid))
return (EADDRINUSE);
}
t = in_pcblookup(table, &zeroin_addr, 0,
&sin->sin_addr, lport, wild);
if (t && (reuseport & t->inp_socket->so_options) == 0)
return (EADDRINUSE);
}
inp->inp_laddr = sin->sin_addr;
}
if (lport == 0) {
u_int16_t first, last;
int count;
if (inp->inp_flags & INP_HIGHPORT) {
first = ipport_hifirstauto; /* sysctl */
last = ipport_hilastauto;
} else if (inp->inp_flags & INP_LOWPORT) {
if ((error = suser(p, 0)))
return (EACCES);
first = IPPORT_RESERVED-1; /* 1023 */
last = 600; /* not IPPORT_RESERVED/2 */
} else {
first = ipport_firstauto; /* sysctl */
last = ipport_lastauto;
}
/*
* 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;
if (count)
*lastport = first - (arc4random() % count);
do {
if (count-- < 0) /* completely used? */
return (EADDRNOTAVAIL);
--*lastport;
if (*lastport > first || *lastport < last)
*lastport = first;
lport = htons(*lastport);
} while (in_baddynamic(*lastport, so->so_proto->pr_protocol) ||
in_pcblookup(table, &zeroin_addr, 0,
&inp->inp_laddr, lport, wild));
} else {
/*
* counting up
*/
count = last - first;
if (count)
*lastport = first + (arc4random() % count);
do {
if (count-- < 0) /* completely used? */
return (EADDRNOTAVAIL);
++*lastport;
if (*lastport < first || *lastport > last)
*lastport = first;
lport = htons(*lastport);
} while (in_baddynamic(*lastport, so->so_proto->pr_protocol) ||
in_pcblookup(table, &zeroin_addr, 0,
&inp->inp_laddr, lport, wild));
}
}
inp->inp_lport = lport;
in_pcbrehash(inp);
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(v, nam)
void *v;
struct mbuf *nam;
{
struct inpcb *inp = v;
struct sockaddr_in *ifaddr = NULL;
struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);
#ifdef INET6
if (sotopf(inp->inp_socket) == PF_INET6)
return (in6_pcbconnect(inp, nam));
if ((inp->inp_flags & INP_IPV6) != 0)
panic("IPv6 pcb passed into in_pcbconnect");
#endif /* INET6 */
if (nam->m_len != sizeof (*sin))
return (EINVAL);
if (sin->sin_family != AF_INET)
return (EAFNOSUPPORT);
if (sin->sin_port == 0)
return (EADDRNOTAVAIL);
if (!TAILQ_EMPTY(&in_ifaddr)) {
/*
* 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 (sin->sin_addr.s_addr == INADDR_ANY)
sin->sin_addr = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr;
else if (sin->sin_addr.s_addr == INADDR_BROADCAST &&
(TAILQ_FIRST(&in_ifaddr)->ia_ifp->if_flags & IFF_BROADCAST))
sin->sin_addr = TAILQ_FIRST(&in_ifaddr)->ia_broadaddr.sin_addr;
}
if (inp->inp_laddr.s_addr == INADDR_ANY) {
int error;
ifaddr = in_selectsrc(sin, &inp->inp_route,
inp->inp_socket->so_options, inp->inp_moptions, &error);
if (ifaddr == NULL) {
if (error == 0)
error = EADDRNOTAVAIL;
return error;
}
}
if (in_pcbhashlookup(inp->inp_table, sin->sin_addr, sin->sin_port,
inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
inp->inp_lport) != 0)
return (EADDRINUSE);
if (inp->inp_laddr.s_addr == INADDR_ANY) {
if (inp->inp_lport == 0 &&
in_pcbbind(inp, (struct mbuf *)0) == EADDRNOTAVAIL)
return (EADDRNOTAVAIL);
inp->inp_laddr = ifaddr->sin_addr;
}
inp->inp_faddr = sin->sin_addr;
inp->inp_fport = sin->sin_port;
in_pcbrehash(inp);
#ifdef IPSEC
{
int error; /* This is just ignored */
/* Cause an IPsec SA to be established. */
ipsp_spd_inp(NULL, AF_INET, 0, &error, IPSP_DIRECTION_OUT,
NULL, inp, NULL);
}
#endif
return (0);
}
void
in_pcbdisconnect(v)
void *v;
{
struct inpcb *inp = v;
switch (sotopf(inp->inp_socket)) {
#ifdef INET6
case PF_INET6:
inp->inp_faddr6 = in6addr_any;
break;
#endif
case PF_INET:
inp->inp_faddr.s_addr = INADDR_ANY;
break;
}
inp->inp_fport = 0;
in_pcbrehash(inp);
if (inp->inp_socket->so_state & SS_NOFDREF)
in_pcbdetach(inp);
}
void
in_pcbdetach(v)
void *v;
{
struct inpcb *inp = v;
struct socket *so = inp->inp_socket;
int s;
so->so_pcb = 0;
sofree(so);
if (inp->inp_options)
(void)m_freem(inp->inp_options);
if (inp->inp_route.ro_rt)
rtfree(inp->inp_route.ro_rt);
#ifdef INET6
if (inp->inp_flags & INP_IPV6)
ip6_freemoptions(inp->inp_moptions6);
else
#endif
ip_freemoptions(inp->inp_moptions);
#ifdef IPSEC
/* IPsec cleanup here */
s = spltdb();
if (inp->inp_tdb_in)
TAILQ_REMOVE(&inp->inp_tdb_in->tdb_inp_in,
inp, inp_tdb_in_next);
if (inp->inp_tdb_out)
TAILQ_REMOVE(&inp->inp_tdb_out->tdb_inp_out, inp,
inp_tdb_out_next);
if (inp->inp_ipsec_remotecred)
ipsp_reffree(inp->inp_ipsec_remotecred);
if (inp->inp_ipsec_remoteauth)
ipsp_reffree(inp->inp_ipsec_remoteauth);
if (inp->inp_ipo)
ipsec_delete_policy(inp->inp_ipo);
splx(s);
#endif
s = splnet();
LIST_REMOVE(inp, inp_lhash);
LIST_REMOVE(inp, inp_hash);
CIRCLEQ_REMOVE(&inp->inp_table->inpt_queue, inp, inp_queue);
splx(s);
pool_put(&inpcb_pool, inp);
}
void
in_setsockaddr(inp, nam)
struct inpcb *inp;
struct mbuf *nam;
{
struct sockaddr_in *sin;
nam->m_len = sizeof (*sin);
sin = mtod(nam, struct sockaddr_in *);
bzero((caddr_t)sin, sizeof (*sin));
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = inp->inp_lport;
sin->sin_addr = inp->inp_laddr;
}
void
in_setpeeraddr(inp, nam)
struct inpcb *inp;
struct mbuf *nam;
{
struct sockaddr_in *sin;
#ifdef INET6
if (sotopf(inp->inp_socket) == PF_INET6) {
in6_setpeeraddr(inp, nam);
return;
}
#endif /* INET6 */
nam->m_len = sizeof (*sin);
sin = mtod(nam, struct sockaddr_in *);
bzero((caddr_t)sin, sizeof (*sin));
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = inp->inp_fport;
sin->sin_addr = inp->inp_faddr;
}
/*
* Pass some notification to all connections of a protocol
* associated with address dst. The "usual action" will be
* taken, depending on the ctlinput cmd. The caller must filter any
* cmds that are uninteresting (e.g., no error in the map).
* Call the protocol specific routine (if any) to report
* any errors for each matching socket.
*
* Must be called at splsoftnet.
*/
void
in_pcbnotifyall(table, dst, errno, notify)
struct inpcbtable *table;
struct sockaddr *dst;
int errno;
void (*notify)(struct inpcb *, int);
{
struct inpcb *inp, *oinp;
struct in_addr faddr;
splassert(IPL_SOFTNET);
#ifdef INET6
/*
* See in6_pcbnotify() for IPv6 codepath. By the time this
* gets called, the addresses passed are either definitely IPv4 or
* IPv6; *_pcbnotify() never gets called with v4-mapped v6 addresses.
*/
#endif /* INET6 */
if (dst->sa_family != AF_INET)
return;
faddr = satosin(dst)->sin_addr;
if (faddr.s_addr == INADDR_ANY)
return;
for (inp = CIRCLEQ_FIRST(&table->inpt_queue);
inp != CIRCLEQ_END(&table->inpt_queue);) {
#ifdef INET6
if (inp->inp_flags & INP_IPV6) {
inp = CIRCLEQ_NEXT(inp, inp_queue);
continue;
}
#endif
if (inp->inp_faddr.s_addr != faddr.s_addr ||
inp->inp_socket == 0) {
inp = CIRCLEQ_NEXT(inp, inp_queue);
continue;
}
oinp = inp;
inp = CIRCLEQ_NEXT(inp, inp_queue);
if (notify)
(*notify)(oinp, errno);
}
}
/*
* 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(inp)
struct inpcb *inp;
{
struct rtentry *rt;
struct rt_addrinfo info;
if ((rt = inp->inp_route.ro_rt)) {
inp->inp_route.ro_rt = 0;
bzero((caddr_t)&info, sizeof(info));
info.rti_info[RTAX_DST] = &inp->inp_route.ro_dst;
info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
info.rti_info[RTAX_NETMASK] = rt_mask(rt);
rt_missmsg(RTM_LOSING, &info, rt->rt_flags, rt->rt_ifp, 0, 0);
if (rt->rt_flags & RTF_DYNAMIC)
(void) rtrequest(RTM_DELETE, rt_key(rt),
rt->rt_gateway, rt_mask(rt), rt->rt_flags,
(struct rtentry **)0, 0);
/*
* A new route can be allocated
* the next time output is attempted.
* rtfree() needs to be called in anycase because the inp
* is still holding a reference to rt.
*/
rtfree(rt);
}
}
/*
* After a routing change, flush old routing
* and allocate a (hopefully) better one.
*/
void
in_rtchange(inp, errno)
struct inpcb *inp;
int errno;
{
if (inp->inp_route.ro_rt) {
rtfree(inp->inp_route.ro_rt);
inp->inp_route.ro_rt = 0;
/*
* A new route can be allocated the next time
* output is attempted.
*/
}
}
struct inpcb *
in_pcblookup(table, faddrp, fport_arg, laddrp, lport_arg, flags)
struct inpcbtable *table;
void *faddrp, *laddrp;
u_int fport_arg, lport_arg;
int flags;
{
struct inpcb *inp, *match = 0;
int matchwild = 3, wildcard;
u_int16_t fport = fport_arg, lport = lport_arg;
struct in_addr faddr = *(struct in_addr *)faddrp;
struct in_addr laddr = *(struct in_addr *)laddrp;
for (inp = LIST_FIRST(INPCBLHASH(table, lport)); inp;
inp = LIST_NEXT(inp, inp_lhash)) {
if (inp->inp_lport != lport)
continue;
wildcard = 0;
#ifdef INET6
if (flags & INPLOOKUP_IPV6) {
struct in6_addr *laddr6 = (struct in6_addr *)laddrp;
struct in6_addr *faddr6 = (struct in6_addr *)faddrp;
if (!(inp->inp_flags & INP_IPV6))
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6)) {
if (IN6_IS_ADDR_UNSPECIFIED(laddr6))
wildcard++;
else if (!IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, laddr6))
continue;
} else {
if (!IN6_IS_ADDR_UNSPECIFIED(laddr6))
wildcard++;
}
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6)) {
if (IN6_IS_ADDR_UNSPECIFIED(faddr6))
wildcard++;
else if (!IN6_ARE_ADDR_EQUAL(&inp->inp_faddr6,
faddr6) || inp->inp_fport != fport)
continue;
} else {
if (!IN6_IS_ADDR_UNSPECIFIED(faddr6))
wildcard++;
}
} else
#endif /* INET6 */
{
#ifdef INET6
if (inp->inp_flags & INP_IPV6)
continue;
#endif /* INET6 */
if (inp->inp_faddr.s_addr != INADDR_ANY) {
if (faddr.s_addr == INADDR_ANY)
wildcard++;
else if (inp->inp_faddr.s_addr != faddr.s_addr ||
inp->inp_fport != fport)
continue;
} else {
if (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 || (flags & INPLOOKUP_WILDCARD)) &&
wildcard < matchwild) {
match = inp;
if ((matchwild = wildcard) == 0)
break;
}
}
return (match);
}
struct rtentry *
in_pcbrtentry(inp)
struct inpcb *inp;
{
struct route *ro;
ro = &inp->inp_route;
/*
* No route yet, so try to acquire one.
*/
if (ro->ro_rt == NULL) {
#ifdef INET6
bzero(ro, sizeof(struct route_in6));
#else
bzero(ro, sizeof(struct route));
#endif
switch(sotopf(inp->inp_socket)) {
#ifdef INET6
case PF_INET6:
if (IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6))
break;
ro->ro_dst.sa_family = AF_INET6;
ro->ro_dst.sa_len = sizeof(struct sockaddr_in6);
((struct sockaddr_in6 *) &ro->ro_dst)->sin6_addr =
inp->inp_faddr6;
rtalloc_mpath(ro, &inp->inp_laddr6.s6_addr32[0], 0);
break;
#endif /* INET6 */
case PF_INET:
if (inp->inp_faddr.s_addr == INADDR_ANY)
break;
ro->ro_dst.sa_family = AF_INET;
ro->ro_dst.sa_len = sizeof(ro->ro_dst);
satosin(&ro->ro_dst)->sin_addr = inp->inp_faddr;
rtalloc_mpath(ro, &inp->inp_laddr.s_addr, 0);
break;
}
}
return (ro->ro_rt);
}
struct sockaddr_in *
in_selectsrc(sin, ro, soopts, mopts, errorp)
struct sockaddr_in *sin;
struct route *ro;
int soopts;
struct ip_moptions *mopts;
int *errorp;
{
struct sockaddr_in *sin2;
struct in_ifaddr *ia;
ia = (struct in_ifaddr *)0;
/*
* If route is known or can be allocated now,
* our src addr is taken from the i/f, else punt.
*/
if (ro->ro_rt &&
(satosin(&ro->ro_dst)->sin_addr.s_addr !=
sin->sin_addr.s_addr ||
soopts & SO_DONTROUTE)) {
RTFREE(ro->ro_rt);
ro->ro_rt = (struct rtentry *)0;
}
if ((soopts & SO_DONTROUTE) == 0 && /*XXX*/
(ro->ro_rt == (struct rtentry *)0 ||
ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
/* No route yet, so try to acquire one */
ro->ro_dst.sa_family = AF_INET;
ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
satosin(&ro->ro_dst)->sin_addr = sin->sin_addr;
rtalloc_mpath(ro, NULL, 0);
/*
* It is important to bzero out the rest of the
* struct sockaddr_in when mixing v6 & v4!
*/
sin2 = (struct sockaddr_in *)&ro->ro_dst;
bzero(sin2->sin_zero, sizeof(sin2->sin_zero));
}
/*
* 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 (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK))
ia = ifatoia(ro->ro_rt->rt_ifa);
if (ia == 0) {
u_int16_t fport = sin->sin_port;
sin->sin_port = 0;
ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
if (ia == 0)
ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
sin->sin_port = fport;
if (ia == 0)
ia = TAILQ_FIRST(&in_ifaddr);
if (ia == 0) {
*errorp = EADDRNOTAVAIL;
return NULL;
}
}
/*
* 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(sin->sin_addr.s_addr) && mopts != NULL) {
struct ip_moptions *imo;
struct ifnet *ifp;
imo = mopts;
if (imo->imo_multicast_ifp != NULL) {
ifp = imo->imo_multicast_ifp;
TAILQ_FOREACH(ia, &in_ifaddr, ia_list)
if (ia->ia_ifp == ifp)
break;
if (ia == 0) {
*errorp = EADDRNOTAVAIL;
return NULL;
}
}
}
return satosin(&ia->ia_addr);
}
void
in_pcbrehash(inp)
struct inpcb *inp;
{
struct inpcbtable *table = inp->inp_table;
int s;
s = splnet();
LIST_REMOVE(inp, inp_lhash);
LIST_INSERT_HEAD(INPCBLHASH(table, inp->inp_lport), inp, inp_lhash);
LIST_REMOVE(inp, inp_hash);
#ifdef INET6
if (inp->inp_flags & INP_IPV6) {
LIST_INSERT_HEAD(IN6PCBHASH(table, &inp->inp_faddr6,
inp->inp_fport, &inp->inp_laddr6, inp->inp_lport),
inp, inp_hash);
} else {
#endif /* INET6 */
LIST_INSERT_HEAD(INPCBHASH(table, &inp->inp_faddr,
inp->inp_fport, &inp->inp_laddr, inp->inp_lport),
inp, inp_hash);
#ifdef INET6
}
#endif /* INET6 */
splx(s);
}
#ifdef DIAGNOSTIC
int in_pcbnotifymiss = 0;
#endif
/*
* The in(6)_pcbhashlookup functions are used to locate connected sockets
* quickly:
* faddr.fport <-> laddr.lport
* No wildcard matching is done so that listening sockets are not found.
* If the functions return NULL in(6)_pcblookup_listen can be used to
* find a listening/bound socket that may accept the connection.
* After those two lookups no other are necessary.
*/
struct inpcb *
in_pcbhashlookup(table, faddr, fport_arg, laddr, lport_arg)
struct inpcbtable *table;
struct in_addr faddr, laddr;
u_int fport_arg, lport_arg;
{
struct inpcbhead *head;
struct inpcb *inp;
u_int16_t fport = fport_arg, lport = lport_arg;
head = INPCBHASH(table, &faddr, fport, &laddr, lport);
LIST_FOREACH(inp, head, inp_hash) {
#ifdef INET6
if (inp->inp_flags & INP_IPV6)
continue; /*XXX*/
#endif
if (inp->inp_faddr.s_addr == faddr.s_addr &&
inp->inp_fport == fport &&
inp->inp_lport == lport &&
inp->inp_laddr.s_addr == laddr.s_addr) {
/*
* Move this PCB to the head of hash chain so that
* repeated accesses are quicker. This is analogous to
* the historic single-entry PCB cache.
*/
if (inp != LIST_FIRST(head)) {
LIST_REMOVE(inp, inp_hash);
LIST_INSERT_HEAD(head, inp, inp_hash);
}
break;
}
}
#ifdef DIAGNOSTIC
if (inp == NULL && in_pcbnotifymiss) {
printf("in_pcbhashlookup: faddr=%08x fport=%d laddr=%08x lport=%d\n",
ntohl(faddr.s_addr), ntohs(fport),
ntohl(laddr.s_addr), ntohs(lport));
}
#endif
return (inp);
}
#ifdef INET6
struct inpcb *
in6_pcbhashlookup(table, faddr, fport_arg, laddr, lport_arg)
struct inpcbtable *table;
struct in6_addr *faddr, *laddr;
u_int fport_arg, lport_arg;
{
struct inpcbhead *head;
struct inpcb *inp;
u_int16_t fport = fport_arg, lport = lport_arg;
head = IN6PCBHASH(table, faddr, fport, laddr, lport);
LIST_FOREACH(inp, head, inp_hash) {
if (!(inp->inp_flags & INP_IPV6))
continue;
if (IN6_ARE_ADDR_EQUAL(&inp->inp_faddr6, faddr) &&
inp->inp_fport == fport && inp->inp_lport == lport &&
IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, laddr)) {
/*
* Move this PCB to the head of hash chain so that
* repeated accesses are quicker. This is analogous to
* the historic single-entry PCB cache.
*/
if (inp != LIST_FIRST(head)) {
LIST_REMOVE(inp, inp_hash);
LIST_INSERT_HEAD(head, inp, inp_hash);
}
break;
}
}
#ifdef DIAGNOSTIC
if (inp == NULL && in_pcbnotifymiss) {
printf("in6_pcbhashlookup: faddr=");
printf(" fport=%d laddr=", ntohs(fport));
printf(" lport=%d\n", ntohs(lport));
}
#endif
return (inp);
}
#endif /* INET6 */
/*
* The in(6)_pcblookup_listen functions are used to locate listening
* sockets quickly. This are sockets with unspecified foreign address
* and port:
* *.* <-> laddr.lport
* *.* <-> *.lport
*/
struct inpcb *
in_pcblookup_listen(table, laddr, lport_arg, reverse)
struct inpcbtable *table;
struct in_addr laddr;
u_int lport_arg;
int reverse;
{
struct inpcbhead *head;
struct in_addr *key1, *key2;
struct inpcb *inp;
u_int16_t lport = lport_arg;
if (reverse) {
key1 = &zeroin_addr;
key2 = &laddr;
} else {
key1 = &laddr;
key2 = &zeroin_addr;
}
head = INPCBHASH(table, &zeroin_addr, 0, key1, lport);
LIST_FOREACH(inp, head, inp_hash) {
#ifdef INET6
if (inp->inp_flags & INP_IPV6)
continue; /*XXX*/
#endif
if (inp->inp_lport == lport && inp->inp_fport == 0 &&
inp->inp_laddr.s_addr == key1->s_addr &&
inp->inp_faddr.s_addr == INADDR_ANY)
break;
}
if (inp == NULL && key1->s_addr != key2->s_addr) {
head = INPCBHASH(table, &zeroin_addr, 0, key2, lport);
LIST_FOREACH(inp, head, inp_hash) {
#ifdef INET6
if (inp->inp_flags & INP_IPV6)
continue; /*XXX*/
#endif
if (inp->inp_lport == lport && inp->inp_fport == 0 &&
inp->inp_laddr.s_addr == key2->s_addr &&
inp->inp_faddr.s_addr == INADDR_ANY)
break;
}
}
#ifdef DIAGNOSTIC
if (inp == NULL && in_pcbnotifymiss) {
printf("in_pcblookup_listen: laddr=%08x lport=%d\n",
ntohl(laddr.s_addr), ntohs(lport));
}
#endif
/*
* Move this PCB to the head of hash chain so that
* repeated accesses are quicker. This is analogous to
* the historic single-entry PCB cache.
*/
if (inp != NULL && inp != LIST_FIRST(head)) {
LIST_REMOVE(inp, inp_hash);
LIST_INSERT_HEAD(head, inp, inp_hash);
}
return (inp);
}
#ifdef INET6
struct inpcb *
in6_pcblookup_listen(table, laddr, lport_arg, reverse)
struct inpcbtable *table;
struct in6_addr *laddr;
u_int lport_arg;
int reverse;
{
struct inpcbhead *head;
struct in6_addr *key1, *key2;
struct inpcb *inp;
u_int16_t lport = lport_arg;
if (reverse) {
key1 = &zeroin6_addr;
key2 = laddr;
} else {
key1 = laddr;
key2 = &zeroin6_addr;
}
head = IN6PCBHASH(table, &zeroin6_addr, 0, key1, lport);
LIST_FOREACH(inp, head, inp_hash) {
if (!(inp->inp_flags & INP_IPV6))
continue;
if (inp->inp_lport == lport && inp->inp_fport == 0 &&
IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, key1) &&
IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6))
break;
}
if (inp == NULL && ! IN6_ARE_ADDR_EQUAL(key1, key2)) {
head = IN6PCBHASH(table, &zeroin6_addr, 0, key2, lport);
LIST_FOREACH(inp, head, inp_hash) {
if (!(inp->inp_flags & INP_IPV6))
continue;
if (inp->inp_lport == lport && inp->inp_fport == 0 &&
IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, key2) &&
IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6))
break;
}
}
#ifdef DIAGNOSTIC
if (inp == NULL && in_pcbnotifymiss) {
printf("in6_pcblookup_listen: laddr= lport=%d\n",
ntohs(lport));
}
#endif
/*
* Move this PCB to the head of hash chain so that
* repeated accesses are quicker. This is analogous to
* the historic single-entry PCB cache.
*/
if (inp != NULL && inp != LIST_FIRST(head)) {
LIST_REMOVE(inp, inp_hash);
LIST_INSERT_HEAD(head, inp, inp_hash);
}
return (inp);
}
#endif /* INET6 */