/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1982, 1986, 1988, 1993
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
- * $FreeBSD: src/sys/netinet/ip_divert.c,v 1.42.2.4 2001/07/29 19:32:40 ume Exp $
+ * $FreeBSD: src/sys/netinet/ip_divert.c,v 1.98 2004/08/17 22:05:54 andre Exp $
*/
-
-#ifndef INET
+#if !INET
#error "IPDIVERT requires INET."
#endif
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
+#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/proc.h>
+#include <machine/endian.h>
#include <net/if.h>
#include <net/route.h>
+#include <net/kpi_protocol.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
+#include <netinet/ip_fw.h>
+#include <netinet/ip_divert.h>
+
+#include <kern/zalloc.h>
+#include <libkern/OSAtomic.h>
/*
* Divert sockets
#define DIVRCVQ (65536 + 100)
/*
- * A 16 bit cookie is passed to and from the user process.
- * The user process can send it back to help the caller know
- * something about where the packet originally came from.
+ * Divert sockets work in conjunction with ipfw, see the divert(4)
+ * manpage for features.
+ * Internally, packets selected by ipfw in ip_input() or ip_output(),
+ * and never diverted before, are passed to the input queue of the
+ * divert socket with a given 'divert_port' number (as specified in
+ * the matching ipfw rule), and they are tagged with a 16 bit cookie
+ * (representing the rule number of the matching ipfw rule), which
+ * is passed to process reading from the socket.
*
- * In the case of ipfw, then the cookie is the rule that sent
- * us here. On reinjection is is the rule after which processing
- * should continue. Leaving it the same will make processing start
- * at the rule number after that which sent it here. Setting it to
- * 0 will restart processing at the beginning.
+ * Packets written to the divert socket are again tagged with a cookie
+ * (usually the same as above) and a destination address.
+ * If the destination address is INADDR_ANY then the packet is
+ * treated as outgoing and sent to ip_output(), otherwise it is
+ * treated as incoming and sent to ip_input().
+ * In both cases, the packet is tagged with the cookie.
*
- * For divert_packet(), ip_divert_cookie is an input value only.
- * For div_output(), ip_divert_cookie is an output value only.
+ * On reinjection, processing in ip_input() and ip_output()
+ * will be exactly the same as for the original packet, except that
+ * ipfw processing will start at the rule number after the one
+ * written in the cookie (so, tagging a packet with a cookie of 0
+ * will cause it to be effectively considered as a standard packet).
*/
-u_int16_t ip_divert_cookie;
/* Internal variables */
static struct inpcbhead divcb;
static struct inpcbinfo divcbinfo;
-static u_long div_sendspace = DIVSNDQ; /* XXX sysctl ? */
-static u_long div_recvspace = DIVRCVQ; /* XXX sysctl ? */
+static u_int32_t div_sendspace = DIVSNDQ; /* XXX sysctl ? */
+static u_int32_t div_recvspace = DIVRCVQ; /* XXX sysctl ? */
/* Optimization: have this preinitialized */
-static struct sockaddr_in divsrc = { sizeof(divsrc), AF_INET };
+static struct sockaddr_in divsrc = { sizeof(divsrc), AF_INET, 0, { 0 }, { 0,0,0,0,0,0,0,0 } };
/* Internal functions */
static int div_output(struct socket *so,
struct mbuf *m, struct sockaddr *addr, struct mbuf *control);
+extern int load_ipfw(void);
/*
* Initialize divert connection block queue.
*/
void
div_init(void)
{
+ struct inpcbinfo *pcbinfo;
LIST_INIT(&divcb);
divcbinfo.listhead = &divcb;
/*
divcbinfo.porthashbase = hashinit(1, M_PCB, &divcbinfo.porthashmask);
divcbinfo.ipi_zone = (void *) zinit(sizeof(struct inpcb),(maxsockets * sizeof(struct inpcb)),
4096, "divzone");
+ pcbinfo = &divcbinfo;
+ /*
+ * allocate lock group attribute and group for udp pcb mutexes
+ */
+ pcbinfo->mtx_grp_attr = lck_grp_attr_alloc_init();
-/*
- * ### LD 08/03: init IP forwarding at this point [ipfw is not a module yet]
- */
-#if !IPFIREWALL_KEXT
- ip_fw_init();
+ pcbinfo->mtx_grp = lck_grp_alloc_init("divcb", pcbinfo->mtx_grp_attr);
+
+ /*
+ * allocate the lock attribute for divert pcb mutexes
+ */
+ pcbinfo->mtx_attr = lck_attr_alloc_init();
+
+ if ((pcbinfo->mtx = lck_rw_alloc_init(pcbinfo->mtx_grp, pcbinfo->mtx_attr)) == NULL)
+ return; /* pretty much dead if this fails... */
+
+#if IPFIREWALL
+ if (!IPFW_LOADED) {
+ load_ipfw();
+ }
#endif
}
* with that protocol number to enter the system from the outside.
*/
void
-div_input(struct mbuf *m, int off)
+div_input(struct mbuf *m, __unused int off)
{
- ipstat.ips_noproto++;
+ OSAddAtomic(1, &ipstat.ips_noproto);
m_freem(m);
}
*
* Setup generic address and protocol structures for div_input routine,
* then pass them along with mbuf chain.
+ * ###LOCK called in ip_mutex from ip_output/ip_input
*/
void
-divert_packet(struct mbuf *m, int incoming, int port)
+divert_packet(struct mbuf *m, int incoming, int port, int rule)
{
struct ip *ip;
struct inpcb *inp;
/* Sanity check */
KASSERT(port != 0, ("%s: port=0", __FUNCTION__));
- /* Record and reset divert cookie */
- divsrc.sin_port = ip_divert_cookie;
- ip_divert_cookie = 0;
+ divsrc.sin_port = rule; /* record matching rule */
/* Assure header */
if (m->m_len < sizeof(struct ip) &&
KASSERT((m->m_flags & M_PKTHDR), ("%s: !PKTHDR", __FUNCTION__));
/* Find IP address for receive interface */
+ ifnet_lock_shared(m->m_pkthdr.rcvif);
TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrhead, ifa_link) {
if (ifa->ifa_addr == NULL)
continue;
((struct sockaddr_in *) ifa->ifa_addr)->sin_addr;
break;
}
+ ifnet_lock_done(m->m_pkthdr.rcvif);
}
/*
* Record the incoming interface name whenever we have one.
/* Put packet on socket queue, if any */
sa = NULL;
nport = htons((u_int16_t)port);
+ lck_rw_lock_shared(divcbinfo.mtx);
LIST_FOREACH(inp, &divcb, inp_list) {
if (inp->inp_lport == nport)
sa = inp->inp_socket;
}
if (sa) {
+ int error = 0;
+
+ socket_lock(sa, 1);
if (sbappendaddr(&sa->so_rcv, (struct sockaddr *)&divsrc,
- m, (struct mbuf *)0) == 0)
- m_freem(m);
- else
+ m, (struct mbuf *)0, &error) != 0)
sorwakeup(sa);
+ socket_unlock(sa, 1);
} else {
m_freem(m);
- ipstat.ips_noproto++;
- ipstat.ips_delivered--;
+ OSAddAtomic(1, &ipstat.ips_noproto);
+ OSAddAtomic(-1, &ipstat.ips_delivered);
}
+ lck_rw_done(divcbinfo.mtx);
}
/*
* If no address specified, or address is 0.0.0.0, send to ip_output();
* otherwise, send to ip_input() and mark as having been received on
* the interface with that address.
+ * ###LOCK called in inet_proto mutex when from div_send.
*/
static int
-div_output(so, m, addr, control)
- struct socket *so;
- register struct mbuf *m;
- struct sockaddr *addr;
- struct mbuf *control;
+div_output(struct socket *so, struct mbuf *m, struct sockaddr *addr,
+ struct mbuf *control)
{
- register struct inpcb *const inp = sotoinpcb(so);
- register struct ip *const ip = mtod(m, struct ip *);
+ struct inpcb *const inp = sotoinpcb(so);
+ struct ip *const ip = mtod(m, struct ip *);
struct sockaddr_in *sin = (struct sockaddr_in *)addr;
int error = 0;
/* Loopback avoidance and state recovery */
if (sin) {
+ struct m_tag *mtag;
+ struct divert_tag *dt;
int len = 0;
char *c = sin->sin_zero;
- ip_divert_cookie = sin->sin_port;
+ mtag = m_tag_alloc(KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_DIVERT,
+ sizeof(struct divert_tag), M_NOWAIT);
+ if (mtag == NULL) {
+ error = ENOBUFS;
+ goto cantsend;
+ }
+ dt = (struct divert_tag *)(mtag+1);
+ dt->info = 0;
+ dt->cookie = sin->sin_port;
+ m_tag_prepend(m, mtag);
/*
* Find receive interface with the given name or IP address.
while (*c++ && (len++ < sizeof(sin->sin_zero)));
if ((len > 0) && (len < sizeof(sin->sin_zero)))
m->m_pkthdr.rcvif = ifunit(sin->sin_zero);
- } else {
- ip_divert_cookie = 0;
}
/* Reinject packet into the system as incoming or outgoing */
if (!sin || sin->sin_addr.s_addr == 0) {
+ struct ip_out_args ipoa = { IFSCOPE_NONE };
+ struct route ro;
+
/*
* Don't allow both user specified and setsockopt options,
* and don't allow packet length sizes that will crash
}
/* Convert fields to host order for ip_output() */
+#if BYTE_ORDER != BIG_ENDIAN
NTOHS(ip->ip_len);
NTOHS(ip->ip_off);
+#endif
+
+ OSAddAtomic(1, &ipstat.ips_rawout);
+ /* Copy the cached route and take an extra reference */
+ inp_route_copyout(inp, &ro);
+
+#if PKT_PRIORITY
+ if (soisbackground(so))
+ m_prio_background(m);
+#endif /* PKT_PRIORITY */
+ socket_unlock(so, 0);
+#if CONFIG_MACF_NET
+ mac_mbuf_label_associate_inpcb(inp, m);
+#endif
/* Send packet to output processing */
- ipstat.ips_rawout++; /* XXX */
- error = ip_output(m, inp->inp_options, &inp->inp_route,
+ error = ip_output(m, inp->inp_options, &ro,
(so->so_options & SO_DONTROUTE) |
- IP_ALLOWBROADCAST | IP_RAWOUTPUT,
- inp->inp_moptions);
+ IP_ALLOWBROADCAST | IP_RAWOUTPUT | IP_OUTARGS,
+ inp->inp_moptions, &ipoa);
+
+ socket_lock(so, 0);
+ /* Synchronize cached PCB route */
+ inp_route_copyin(inp, &ro);
} else {
struct ifaddr *ifa;
goto cantsend;
}
m->m_pkthdr.rcvif = ifa->ifa_ifp;
+ ifafree(ifa);
}
-
+#if CONFIG_MACF_NET
+ mac_mbuf_label_associate_socket(so, m);
+#endif
/* Send packet to input processing */
- ip_input(m);
+ proto_inject(PF_INET, m);
}
- /* paranoid: Reset for next time (and other packets) */
- /* almost definitly already done in the ipfw filter but.. */
- ip_divert_cookie = 0;
return error;
cantsend:
m_freem(m);
- ip_divert_cookie = 0;
return error;
}
div_attach(struct socket *so, int proto, struct proc *p)
{
struct inpcb *inp;
- int error, s;
+ int error;
+
inp = sotoinpcb(so);
if (inp)
panic("div_attach");
- if (p && (error = suser(p->p_ucred, &p->p_acflag)) != 0)
+ if ((error = proc_suser(p)) != 0)
return error;
error = soreserve(so, div_sendspace, div_recvspace);
if (error)
return error;
- s = splnet();
error = in_pcballoc(so, &divcbinfo, p);
- splx(s);
if (error)
return error;
inp = (struct inpcb *)so->so_pcb;
/* The socket is always "connected" because
we always know "where" to send the packet */
so->so_state |= SS_ISCONNECTED;
+
+#ifdef MORE_DICVLOCK_DEBUG
+ printf("div_attach: so=%p sopcb=%p lock=%x ref=%x\n",
+ so, so->so_pcb, ((struct inpcb *)so->so_pcb)->inpcb_mtx, so->so_usecount);
+#endif
return 0;
}
{
struct inpcb *inp;
+#ifdef MORE_DICVLOCK_DEBUG
+ printf("div_detach: so=%p sopcb=%p lock=%x ref=%x\n",
+ so, so->so_pcb, ((struct inpcb *)so->so_pcb)->inpcb_mtx, so->so_usecount);
+#endif
inp = sotoinpcb(so);
if (inp == 0)
- panic("div_detach");
+ panic("div_detach: so=%p null inp\n", so);
in_pcbdetach(inp);
+ inp->inp_state = INPCB_STATE_DEAD;
return 0;
}
div_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
{
struct inpcb *inp;
- int s;
int error;
- s = splnet();
inp = sotoinpcb(so);
/* in_pcbbind assumes that the socket is a sockaddr_in
* and in_pcbbind requires a valid address. Since divert
((struct sockaddr_in *)nam)->sin_addr.s_addr = INADDR_ANY;
error = in_pcbbind(inp, nam, p);
}
- splx(s);
return error;
}
}
static int
-div_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
- struct mbuf *control, struct proc *p)
+div_send(struct socket *so, __unused int flags, struct mbuf *m, struct sockaddr *nam,
+ struct mbuf *control, __unused struct proc *p)
{
/* Packet must have a header (but that's about it) */
if (m->m_len < sizeof (struct ip) &&
(m = m_pullup(m, sizeof (struct ip))) == 0) {
- ipstat.ips_toosmall++;
+ OSAddAtomic(1, &ipstat.ips_toosmall);
m_freem(m);
return EINVAL;
}
return div_output(so, m, nam, control);
}
+#if 0
static int
div_pcblist SYSCTL_HANDLER_ARGS
{
- int error, i, n, s;
+#pragma unused(oidp, arg1, arg2)
+ int error, i, n;
struct inpcb *inp, **inp_list;
inp_gen_t gencnt;
struct xinpgen xig;
* The process of preparing the TCB list is too time-consuming and
* resource-intensive to repeat twice on every request.
*/
- if (req->oldptr == 0) {
+ lck_rw_lock_exclusive(divcbinfo.mtx);
+ if (req->oldptr == USER_ADDR_NULL) {
n = divcbinfo.ipi_count;
req->oldidx = 2 * (sizeof xig)
+ (n + n/8) * sizeof(struct xinpcb);
+ lck_rw_done(divcbinfo.mtx);
return 0;
}
- if (req->newptr != 0)
+ if (req->newptr != USER_ADDR_NULL) {
+ lck_rw_done(divcbinfo.mtx);
return EPERM;
+ }
/*
* OK, now we're committed to doing something.
*/
- s = splnet();
gencnt = divcbinfo.ipi_gencnt;
n = divcbinfo.ipi_count;
- splx(s);
+ bzero(&xig, sizeof(xig));
xig.xig_len = sizeof xig;
xig.xig_count = n;
xig.xig_gen = gencnt;
xig.xig_sogen = so_gencnt;
error = SYSCTL_OUT(req, &xig, sizeof xig);
- if (error)
+ if (error) {
+ lck_rw_done(divcbinfo.mtx);
return error;
+ }
inp_list = _MALLOC(n * sizeof *inp_list, M_TEMP, M_WAITOK);
- if (inp_list == 0)
+ if (inp_list == 0) {
+ lck_rw_done(divcbinfo.mtx);
return ENOMEM;
+ }
- s = splnet();
for (inp = LIST_FIRST(divcbinfo.listhead), i = 0; inp && i < n;
inp = LIST_NEXT(inp, inp_list)) {
#ifdef __APPLE__
- if (inp->inp_gencnt <= gencnt)
+ if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD)
#else
if (inp->inp_gencnt <= gencnt && !prison_xinpcb(req->p, inp))
#endif
inp_list[i++] = inp;
}
- splx(s);
n = i;
error = 0;
for (i = 0; i < n; i++) {
inp = inp_list[i];
- if (inp->inp_gencnt <= gencnt) {
+ if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD) {
struct xinpcb xi;
+
+ bzero(&xi, sizeof(xi));
xi.xi_len = sizeof xi;
/* XXX should avoid extra copy */
- bcopy(inp, &xi.xi_inp, sizeof *inp);
+ inpcb_to_compat(inp, &xi.xi_inp);
if (inp->inp_socket)
sotoxsocket(inp->inp_socket, &xi.xi_socket);
error = SYSCTL_OUT(req, &xi, sizeof xi);
* while we were processing this request, and it
* might be necessary to retry.
*/
- s = splnet();
+ bzero(&xig, sizeof(xig));
+ xig.xig_len = sizeof xig;
xig.xig_gen = divcbinfo.ipi_gencnt;
xig.xig_sogen = so_gencnt;
xig.xig_count = divcbinfo.ipi_count;
- splx(s);
error = SYSCTL_OUT(req, &xig, sizeof xig);
}
FREE(inp_list, M_TEMP);
+ lck_rw_done(divcbinfo.mtx);
return error;
}
+#endif
-#warning Fix SYSCTL net_inet_divert
-#if 0
-SYSCTL_DECL(_net_inet_divert);
-SYSCTL_PROC(_net_inet_divert, OID_AUTO, pcblist, CTLFLAG_RD, 0, 0,
- div_pcblist, "S,xinpcb", "List of active divert sockets");
+__private_extern__ int
+div_lock(struct socket *so, int refcount, void *lr)
+{
+ void *lr_saved;
+
+ if (lr == NULL)
+ lr_saved = __builtin_return_address(0);
+ else
+ lr_saved = lr;
+
+#ifdef MORE_DICVLOCK_DEBUG
+ printf("div_lock: so=%p sopcb=%p lock=%p ref=%x lr=%p\n",
+ so, so->so_pcb, so->so_pcb ?
+ ((struct inpcb *)so->so_pcb)->inpcb_mtx : NULL,
+ so->so_usecount, lr_saved);
#endif
+ if (so->so_pcb) {
+ lck_mtx_lock(((struct inpcb *)so->so_pcb)->inpcb_mtx);
+ } else {
+ panic("div_lock: so=%p NO PCB! lr=%p lrh= lrh= %s\n",
+ so, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+
+ if (so->so_usecount < 0) {
+ panic("div_lock: so=%p so_pcb=%p lr=%p ref=%x lrh= %s\n",
+ so, so->so_pcb, lr_saved, so->so_usecount,
+ solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+
+ if (refcount)
+ so->so_usecount++;
+ so->lock_lr[so->next_lock_lr] = lr_saved;
+ so->next_lock_lr = (so->next_lock_lr+1) % SO_LCKDBG_MAX;
+
+ return (0);
+}
+
+__private_extern__ int
+div_unlock(struct socket *so, int refcount, void *lr)
+{
+ void *lr_saved;
+ lck_mtx_t * mutex_held;
+ struct inpcb *inp = sotoinpcb(so);
+
+ if (lr == NULL)
+ lr_saved = __builtin_return_address(0);
+ else
+ lr_saved = lr;
+
+#ifdef MORE_DICVLOCK_DEBUG
+ printf("div_unlock: so=%p sopcb=%p lock=%p ref=%x lr=%p\n",
+ so, so->so_pcb, so->so_pcb ?
+ ((struct inpcb *)so->so_pcb)->inpcb_mtx : NULL,
+ so->so_usecount, lr_saved);
+#endif
+ if (refcount)
+ so->so_usecount--;
+
+ if (so->so_usecount < 0) {
+ panic("div_unlock: so=%p usecount=%x lrh= %s\n",
+ so, so->so_usecount, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+ if (so->so_pcb == NULL) {
+ panic("div_unlock: so=%p NO PCB usecount=%x lr=%p lrh= %s\n",
+ so, so->so_usecount, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+ mutex_held = ((struct inpcb *)so->so_pcb)->inpcb_mtx;
+
+ if (so->so_usecount == 0 && (inp->inp_wantcnt == WNT_STOPUSING)) {
+ lck_rw_lock_exclusive(divcbinfo.mtx);
+ if (inp->inp_state != INPCB_STATE_DEAD)
+ in_pcbdetach(inp);
+ in_pcbdispose(inp);
+ lck_rw_done(divcbinfo.mtx);
+ return (0);
+ }
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+ so->unlock_lr[so->next_unlock_lr] = lr_saved;
+ so->next_unlock_lr = (so->next_unlock_lr+1) % SO_LCKDBG_MAX;
+ lck_mtx_unlock(mutex_held);
+ return (0);
+}
+
+__private_extern__ lck_mtx_t *
+div_getlock(struct socket *so, __unused int locktype)
+{
+ struct inpcb *inpcb = (struct inpcb *)so->so_pcb;
+
+ if (so->so_pcb) {
+ if (so->so_usecount < 0)
+ panic("div_getlock: so=%p usecount=%x lrh= %s\n",
+ so, so->so_usecount, solockhistory_nr(so));
+ return(inpcb->inpcb_mtx);
+ } else {
+ panic("div_getlock: so=%p NULL NO PCB lrh= %s\n",
+ so, solockhistory_nr(so));
+ return (so->so_proto->pr_domain->dom_mtx);
+ }
+}
+
struct pr_usrreqs div_usrreqs = {
div_abort, pru_accept_notsupp, div_attach, div_bind,
pru_connect_notsupp, pru_connect2_notsupp, in_control, div_detach,
div_disconnect, pru_listen_notsupp, in_setpeeraddr, pru_rcvd_notsupp,
pru_rcvoob_notsupp, div_send, pru_sense_null, div_shutdown,
- in_setsockaddr, sosend, soreceive, sopoll
+ in_setsockaddr, sosend, soreceive, pru_sopoll_notsupp
};
+
projects / apple / xnu.git / blobdiff