X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/d7e50217d7adf6e52786a38bcaa4cd698cb9a79e..7e41aa883dd258f888d0470250eead40a53ef1f5:/bsd/netinet/ip_divert.c diff --git a/bsd/netinet/ip_divert.c b/bsd/netinet/ip_divert.c index 512c65ca7..614c0c7c1 100644 --- a/bsd/netinet/ip_divert.c +++ b/bsd/netinet/ip_divert.c @@ -1,16 +1,19 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2013 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 @@ -20,7 +23,7 @@ * 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 @@ -54,11 +57,10 @@ * 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 @@ -67,15 +69,18 @@ #include #include #include +#include #include #include #include #include #include +#include #include #include +#include #include #include @@ -83,6 +88,11 @@ #include #include #include +#include +#include + +#include +#include /* * Divert sockets @@ -95,58 +105,96 @@ #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); + struct mbuf *m, struct sockaddr_in *addr, struct mbuf *control); +extern int load_ipfw(void); /* * Initialize divert connection block queue. */ void -div_init(void) +div_init(struct protosw *pp, struct domain *dp) { +#pragma unused(dp) + static int div_initialized = 0; + struct inpcbinfo *pcbinfo; + + VERIFY((pp->pr_flags & (PR_INITIALIZED|PR_ATTACHED)) == PR_ATTACHED); + + if (div_initialized) + return; + div_initialized = 1; + LIST_INIT(&divcb); - divcbinfo.listhead = &divcb; + divcbinfo.ipi_listhead = &divcb; /* * XXX We don't use the hash list for divert IP, but it's easier * to allocate a one entry hash list than it is to check all - * over the place for hashbase == NULL. + * over the place for ipi_hashbase == NULL. */ - divcbinfo.hashbase = hashinit(1, M_PCB, &divcbinfo.hashmask); - divcbinfo.porthashbase = hashinit(1, M_PCB, &divcbinfo.porthashmask); - divcbinfo.ipi_zone = (void *) zinit(sizeof(struct inpcb),(maxsockets * sizeof(struct inpcb)), + divcbinfo.ipi_hashbase = hashinit(1, M_PCB, &divcbinfo.ipi_hashmask); + divcbinfo.ipi_porthashbase = hashinit(1, M_PCB, &divcbinfo.ipi_porthashmask); + divcbinfo.ipi_zone = zinit(sizeof(struct inpcb),(512 * sizeof(struct inpcb)), 4096, "divzone"); + pcbinfo = &divcbinfo; + /* + * allocate lock group attribute and group for udp pcb mutexes + */ + pcbinfo->ipi_lock_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->ipi_lock_grp = lck_grp_alloc_init("divcb", pcbinfo->ipi_lock_grp_attr); + + /* + * allocate the lock attribute for divert pcb mutexes + */ + pcbinfo->ipi_lock_attr = lck_attr_alloc_init(); + + if ((pcbinfo->ipi_lock = lck_rw_alloc_init(pcbinfo->ipi_lock_grp, + pcbinfo->ipi_lock_attr)) == NULL) { + panic("%s: unable to allocate PCB lock\n", __func__); + /* NOTREACHED */ + } + + in_pcbinfo_attach(&divcbinfo); + +#if IPFIREWALL + if (!IPFW_LOADED) { + load_ipfw(); + } #endif } @@ -155,9 +203,9 @@ div_init(void) * 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); } @@ -168,7 +216,7 @@ div_input(struct mbuf *m, int off) * then pass them along with mbuf chain. */ 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; @@ -178,9 +226,7 @@ divert_packet(struct mbuf *m, int incoming, int port) /* 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) && @@ -201,15 +247,19 @@ divert_packet(struct mbuf *m, int incoming, int port) 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; - if (ifa->ifa_addr->sa_family != AF_INET) + IFA_LOCK(ifa); + if (ifa->ifa_addr->sa_family != AF_INET) { + IFA_UNLOCK(ifa); continue; + } divsrc.sin_addr = - ((struct sockaddr_in *) ifa->ifa_addr)->sin_addr; + ((struct sockaddr_in *)(void *) ifa->ifa_addr)->sin_addr; + IFA_UNLOCK(ifa); break; } + ifnet_lock_done(m->m_pkthdr.rcvif); } /* * Record the incoming interface name whenever we have one. @@ -235,28 +285,31 @@ divert_packet(struct mbuf *m, int incoming, int port) * (see div_output for the other half of this.) */ snprintf(divsrc.sin_zero, sizeof(divsrc.sin_zero), - "%s%d", m->m_pkthdr.rcvif->if_name, - m->m_pkthdr.rcvif->if_unit); + "%s", if_name(m->m_pkthdr.rcvif)); } /* Put packet on socket queue, if any */ sa = NULL; nport = htons((u_int16_t)port); + lck_rw_lock_shared(divcbinfo.ipi_lock); 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.ipi_lock); } /* @@ -265,28 +318,40 @@ divert_packet(struct mbuf *m, int incoming, int port) * 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_in *sin, + struct mbuf *control) { - register struct inpcb *const inp = sotoinpcb(so); - register struct ip *const ip = mtod(m, struct ip *); - struct sockaddr_in *sin = (struct sockaddr_in *)addr; + struct inpcb *const inp = sotoinpcb(so); + struct ip *const ip = mtod(m, struct ip *); int error = 0; + mbuf_svc_class_t msc = MBUF_SC_UNSPEC; - if (control) - m_freem(control); /* XXX */ + if (control != NULL) { + msc = mbuf_service_class_from_control(control); + m_freem(control); /* XXX */ + control = NULL; + } /* 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_create(KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_DIVERT, + sizeof(struct divert_tag), M_NOWAIT, m); + 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. @@ -300,12 +365,15 @@ div_output(so, m, addr, control) 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, { 0 }, IPOAF_SELECT_SRCIF, 0 }; + struct route ro; + struct ip_moptions *imo; + /* * Don't allow both user specified and setsockopt options, * and don't allow packet length sizes that will crash @@ -317,47 +385,67 @@ div_output(so, m, addr, control) } /* 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); + + set_packet_service_class(m, so, msc, 0); + imo = inp->inp_moptions; + if (imo != NULL) + IMO_ADDREF(imo); + 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, + imo, &ipoa); + + socket_lock(so, 0); + if (imo != NULL) + IMO_REMREF(imo); + /* Synchronize cached PCB route */ + inp_route_copyin(inp, &ro); } else { struct ifaddr *ifa; /* If no luck with the name above. check by IP address. */ if (m->m_pkthdr.rcvif == NULL) { + struct sockaddr_in _sin; /* - * Make sure there are no distractions - * for ifa_ifwithaddr. Clear the port and the ifname. - * Maybe zap all 8 bytes at once using a 64bit write? + * Make sure there are no distractions for + * ifa_ifwithaddr; use sanitized version. */ - bzero(sin->sin_zero, sizeof(sin->sin_zero)); - /* *((u_int64_t *)sin->sin_zero) = 0; */ /* XXX ?? */ - sin->sin_port = 0; - if (!(ifa = ifa_ifwithaddr((struct sockaddr *) sin))) { + bzero(&_sin, sizeof (_sin)); + _sin.sin_family = AF_INET; + _sin.sin_len = sizeof (struct sockaddr_in); + _sin.sin_addr.s_addr = sin->sin_addr.s_addr; + if (!(ifa = ifa_ifwithaddr(SA(&_sin)))) { error = EADDRNOTAVAIL; goto cantsend; } m->m_pkthdr.rcvif = ifa->ifa_ifp; + IFA_REMREF(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; } @@ -365,20 +453,19 @@ static int 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; @@ -388,6 +475,14 @@ div_attach(struct socket *so, int proto, struct proc *p) /* 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=0x%llx sopcb=0x%llx lock=0x%llx ref=%x\n", + (uint64_t)VM_KERNEL_ADDRPERM(so), + (uint64_t)VM_KERNEL_ADDRPERM(so->so_pcb), + (uint64_t)VM_KERNEL_ADDRPERM(&(sotoinpcb(so)->inpcb_mtx)), + so->so_usecount); +#endif return 0; } @@ -396,10 +491,18 @@ div_detach(struct socket *so) { struct inpcb *inp; +#ifdef MORE_DICVLOCK_DEBUG + printf("div_detach: so=0x%llx sopcb=0x%llx lock=0x%llx ref=%x\n", + (uint64_t)VM_KERNEL_ADDRPERM(so), + (uint64_t)VM_KERNEL_ADDRPERM(so->so_pcb), + (uint64_t)VM_KERNEL_ADDRPERM(&(sotoinpcb(so)->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; } @@ -422,10 +525,8 @@ static int 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 @@ -437,10 +538,9 @@ div_bind(struct socket *so, struct sockaddr *nam, struct proc *p) if (nam->sa_family != AF_INET) { error = EAFNOSUPPORT; } else { - ((struct sockaddr_in *)nam)->sin_addr.s_addr = INADDR_ANY; + ((struct sockaddr_in *)(void *)nam)->sin_addr.s_addr = INADDR_ANY; error = in_pcbbind(inp, nam, p); } - splx(s); return error; } @@ -452,25 +552,27 @@ div_shutdown(struct socket *so) } 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; } /* Send packet */ - return div_output(so, m, nam, control); + return div_output(so, m, SIN(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; @@ -479,57 +581,64 @@ div_pcblist SYSCTL_HANDLER_ARGS * 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.ipi_lock); + 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.ipi_lock); return 0; } - if (req->newptr != 0) + if (req->newptr != USER_ADDR_NULL) { + lck_rw_done(divcbinfo.ipi_lock); 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.ipi_lock); 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.ipi_lock); return ENOMEM; + } - s = splnet(); - for (inp = LIST_FIRST(divcbinfo.listhead), i = 0; inp && i < n; + for (inp = LIST_FIRST(divcbinfo.ipi_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); @@ -543,28 +652,137 @@ div_pcblist SYSCTL_HANDLER_ARGS * 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.ipi_lock); 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=0x%llx sopcb=0x%llx lock=0x%llx ref=%x " + "lr=0x%llx\n", (uint64_t)VM_KERNEL_ADDRPERM(so), + (uint64_t)VM_KERNEL_ADDRPERM(so->so_pcb), so->so_pcb ? + (uint64_t)VM_KERNEL_ADDRPERM(&(sotoinpcb(so)->inpcb_mtx)) : NULL, + so->so_usecount, (uint64_t)VM_KERNEL_ADDRPERM(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=0x%llx sopcb=0x%llx lock=0x%llx ref=%x " + "lr=0x%llx\n", (uint64_t)VM_KERNEL_ADDRPERM(so), + (uint64_t)VM_KERNEL_ADDRPERM(so->so_pcb), so->so_pcb ? + (uint64_t)VM_KERNEL_ADDRPERM(&(sotoinpcb(so)->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.ipi_lock); + if (inp->inp_state != INPCB_STATE_DEAD) + in_pcbdetach(inp); + in_pcbdispose(inp); + lck_rw_done(divcbinfo.ipi_lock); + 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 + .pru_abort = div_abort, + .pru_attach = div_attach, + .pru_bind = div_bind, + .pru_control = in_control, + .pru_detach = div_detach, + .pru_disconnect = div_disconnect, + .pru_peeraddr = in_getpeeraddr, + .pru_send = div_send, + .pru_shutdown = div_shutdown, + .pru_sockaddr = in_getsockaddr, + .pru_sosend = sosend, + .pru_soreceive = soreceive, }; +