ip_divert.c revision 101088
11902Swollman/* 21902Swollman * Copyright (c) 1982, 1986, 1988, 1993 31902Swollman * The Regents of the University of California. All rights reserved. 41902Swollman * 51902Swollman * Redistribution and use in source and binary forms, with or without 61902Swollman * modification, are permitted provided that the following conditions 71902Swollman * are met: 88870Srgrimes * 1. Redistributions of source code must retain the above copyright 91902Swollman * notice, this list of conditions and the following disclaimer. 101902Swollman * 2. Redistributions in binary form must reproduce the above copyright 111902Swollman * notice, this list of conditions and the following disclaimer in the 128870Srgrimes * documentation and/or other materials provided with the distribution. 131902Swollman * 3. All advertising materials mentioning features or use of this software 141902Swollman * must display the following acknowledgement: 151902Swollman * This product includes software developed by the University of 168870Srgrimes * California, Berkeley and its contributors. 171902Swollman * 4. Neither the name of the University nor the names of its contributors 181902Swollman * may be used to endorse or promote products derived from this software 191902Swollman * without specific prior written permission. 208870Srgrimes * 211902Swollman * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221902Swollman * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231902Swollman * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 248870Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251902Swollman * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261902Swollman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271902Swollman * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281902Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 298870Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301902Swollman * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311902Swollman * SUCH DAMAGE. 3236257Swpaul * 331902Swollman * $FreeBSD: head/sys/netinet/ip_divert.c 101088 2002-07-31 16:42:47Z rwatson $ 341902Swollman */ 351902Swollman 361902Swollman#include "opt_inet.h" 371902Swollman#include "opt_ipfw.h" 381902Swollman#include "opt_ipdivert.h" 391902Swollman#include "opt_ipsec.h" 401902Swollman#include "opt_mac.h" 411902Swollman 421902Swollman#ifndef INET 431902Swollman#error "IPDIVERT requires INET." 441902Swollman#endif 451902Swollman 461902Swollman#include <sys/param.h> 471902Swollman#include <sys/kernel.h> 488870Srgrimes#include <sys/lock.h> 491902Swollman#include <sys/malloc.h> 501902Swollman#include <sys/mac.h> 511902Swollman#include <sys/mbuf.h> 521902Swollman#include <sys/proc.h> 531902Swollman#include <sys/protosw.h> 5411669Sphk#include <sys/signalvar.h> 551902Swollman#include <sys/socket.h> 561902Swollman#include <sys/socketvar.h> 571902Swollman#include <sys/sx.h> 581902Swollman#include <sys/sysctl.h> 591902Swollman#include <sys/systm.h> 601902Swollman 611902Swollman#include <vm/uma.h> 621902Swollman 631902Swollman#include <net/if.h> 641902Swollman#include <net/route.h> 651902Swollman 661902Swollman#include <netinet/in.h> 671902Swollman#include <netinet/in_pcb.h> 681902Swollman#include <netinet/in_systm.h> 691902Swollman#include <netinet/in_var.h> 701902Swollman#include <netinet/ip.h> 7121062Speter#include <netinet/ip_var.h> 721902Swollman 731902Swollman/* 741902Swollman * Divert sockets 751902Swollman */ 761902Swollman 771902Swollman/* 781902Swollman * Allocate enough space to hold a full IP packet 791902Swollman */ 801902Swollman#define DIVSNDQ (65536 + 100) 811902Swollman#define DIVRCVQ (65536 + 100) 821902Swollman 831902Swollman/* 841902Swollman * Divert sockets work in conjunction with ipfw, see the divert(4) 851902Swollman * manpage for features. 861902Swollman * Internally, packets selected by ipfw in ip_input() or ip_output(), 871902Swollman * and never diverted before, are passed to the input queue of the 881902Swollman * divert socket with a given 'divert_port' number (as specified in 891902Swollman * the matching ipfw rule), and they are tagged with a 16 bit cookie 901902Swollman * (representing the rule number of the matching ipfw rule), which 911902Swollman * is passed to process reading from the socket. 921902Swollman * 931902Swollman * Packets written to the divert socket are again tagged with a cookie 941902Swollman * (usually the same as above) and a destination address. 951902Swollman * If the destination address is INADDR_ANY then the packet is 961902Swollman * treated as outgoing and sent to ip_output(), otherwise it is 971902Swollman * treated as incoming and sent to ip_input(). 9821062Speter * In both cases, the packet is tagged with the cookie. 991902Swollman * 1001902Swollman * On reinjection, processing in ip_input() and ip_output() 1011902Swollman * will be exactly the same as for the original packet, except that 1021902Swollman * ipfw processing will start at the rule number after the one 1031902Swollman * written in the cookie (so, tagging a packet with a cookie of 0 1041902Swollman * will cause it to be effectively considered as a standard packet). 1051902Swollman */ 10621062Speter 1071902Swollman/* Internal variables */ 1081902Swollmanstatic struct inpcbhead divcb; 1091902Swollmanstatic struct inpcbinfo divcbinfo; 11021062Speter 1111902Swollmanstatic u_long div_sendspace = DIVSNDQ; /* XXX sysctl ? */ 1121902Swollmanstatic u_long div_recvspace = DIVRCVQ; /* XXX sysctl ? */ 1131902Swollman 1141902Swollman/* Optimization: have this preinitialized */ 11521062Speterstatic struct sockaddr_in divsrc = { sizeof(divsrc), AF_INET }; 1161902Swollman 1171902Swollman/* 1181902Swollman * Initialize divert connection block queue. 1191902Swollman */ 1201902Swollmanvoid 1211902Swollmandiv_init(void) 1221902Swollman{ 1231902Swollman INP_INFO_LOCK_INIT(&divcbinfo, "div"); 1241902Swollman LIST_INIT(&divcb); 1251902Swollman divcbinfo.listhead = &divcb; 1261902Swollman /* 1271902Swollman * XXX We don't use the hash list for divert IP, but it's easier 1281902Swollman * to allocate a one entry hash list than it is to check all 1291902Swollman * over the place for hashbase == NULL. 1301902Swollman */ 1311902Swollman divcbinfo.hashbase = hashinit(1, M_PCB, &divcbinfo.hashmask); 1321902Swollman divcbinfo.porthashbase = hashinit(1, M_PCB, &divcbinfo.porthashmask); 1331902Swollman divcbinfo.ipi_zone = uma_zcreate("divcb", sizeof(struct inpcb), 1341902Swollman NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 1351902Swollman uma_zone_set_max(divcbinfo.ipi_zone, maxsockets); 1361902Swollman} 1371902Swollman 1381902Swollman/* 1391902Swollman * IPPROTO_DIVERT is not a real IP protocol; don't allow any packets 1401902Swollman * with that protocol number to enter the system from the outside. 1411902Swollman */ 1421902Swollmanvoid 1431902Swollmandiv_input(struct mbuf *m, int off) 1441902Swollman{ 1451902Swollman ipstat.ips_noproto++; 1461902Swollman m_freem(m); 1471902Swollman} 1481902Swollman 1491902Swollman/* 1508870Srgrimes * Divert a packet by passing it up to the divert socket at port 'port'. 1518870Srgrimes * 1521902Swollman * Setup generic address and protocol structures for div_input routine, 1531902Swollman * then pass them along with mbuf chain. 1541902Swollman */ 1551902Swollmanvoid 1561902Swollmandivert_packet(struct mbuf *m, int incoming, int port, int rule) 1571902Swollman{ 1581902Swollman struct ip *ip; 1591902Swollman struct inpcb *inp; 1601902Swollman struct socket *sa; 1611902Swollman u_int16_t nport; 1621902Swollman 1631902Swollman /* Sanity check */ 1641902Swollman KASSERT(port != 0, ("%s: port=0", __func__)); 1651902Swollman 1661902Swollman divsrc.sin_port = rule; /* record matching rule */ 16721062Speter 1681902Swollman /* Assure header */ 1691902Swollman if (m->m_len < sizeof(struct ip) && 1701902Swollman (m = m_pullup(m, sizeof(struct ip))) == 0) 1711902Swollman return; 1721902Swollman ip = mtod(m, struct ip *); 1731902Swollman 1741902Swollman /* 1751902Swollman * Record receive interface address, if any. 1761902Swollman * But only for incoming packets. 1771902Swollman */ 1781902Swollman divsrc.sin_addr.s_addr = 0; 17921062Speter if (incoming) { 18021062Speter struct ifaddr *ifa; 1811902Swollman 1821902Swollman /* Sanity check */ 1831902Swollman KASSERT((m->m_flags & M_PKTHDR), ("%s: !PKTHDR", __func__)); 1841902Swollman 1851902Swollman /* Find IP address for receive interface */ 1861902Swollman TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrhead, ifa_link) { 1871902Swollman if (ifa->ifa_addr == NULL) 1881902Swollman continue; 1891902Swollman if (ifa->ifa_addr->sa_family != AF_INET) 1901902Swollman continue; 1911902Swollman divsrc.sin_addr = 1921902Swollman ((struct sockaddr_in *) ifa->ifa_addr)->sin_addr; 1931902Swollman break; 1941902Swollman } 1951902Swollman } 1961902Swollman /* 1971902Swollman * Record the incoming interface name whenever we have one. 1981902Swollman */ 1991902Swollman bzero(&divsrc.sin_zero, sizeof(divsrc.sin_zero)); 2001902Swollman if (m->m_pkthdr.rcvif) { 2011902Swollman /* 20221062Speter * Hide the actual interface name in there in the 20321062Speter * sin_zero array. XXX This needs to be moved to a 2041902Swollman * different sockaddr type for divert, e.g. 2051902Swollman * sockaddr_div with multiple fields like 20621062Speter * sockaddr_dl. Presently we have only 7 bytes 20721062Speter * but that will do for now as most interfaces 20821062Speter * are 4 or less + 2 or less bytes for unit. 20921062Speter * There is probably a faster way of doing this, 21021062Speter * possibly taking it from the sockaddr_dl on the iface. 2111902Swollman * This solves the problem of a P2P link and a LAN interface 21221062Speter * having the same address, which can result in the wrong 2131902Swollman * interface being assigned to the packet when fed back 21421062Speter * into the divert socket. Theoretically if the daemon saves 2151902Swollman * and re-uses the sockaddr_in as suggested in the man pages, 2161902Swollman * this iface name will come along for the ride. 2171902Swollman * (see div_output for the other half of this.) 2181902Swollman */ 2191902Swollman snprintf(divsrc.sin_zero, sizeof(divsrc.sin_zero), 2201902Swollman "%s%d", m->m_pkthdr.rcvif->if_name, 2211902Swollman m->m_pkthdr.rcvif->if_unit); 2221902Swollman } 2231902Swollman 2241902Swollman /* Put packet on socket queue, if any */ 22521062Speter sa = NULL; 2261902Swollman nport = htons((u_int16_t)port); 22721062Speter LIST_FOREACH(inp, &divcb, inp_list) { 2281902Swollman if (inp->inp_lport == nport) 2291902Swollman sa = inp->inp_socket; 2301902Swollman } 2311902Swollman if (sa) { 23221062Speter if (sbappendaddr(&sa->so_rcv, (struct sockaddr *)&divsrc, 2331902Swollman m, (struct mbuf *)0) == 0) 2341902Swollman m_freem(m); 2351902Swollman else 23621062Speter sorwakeup(sa); 23721062Speter } else { 2381902Swollman m_freem(m); 23921062Speter ipstat.ips_noproto++; 2401902Swollman ipstat.ips_delivered--; 2411902Swollman } 2421902Swollman} 2431902Swollman 2441902Swollman/* 2451902Swollman * Deliver packet back into the IP processing machinery. 2461902Swollman * 2471902Swollman * If no address specified, or address is 0.0.0.0, send to ip_output(); 2481902Swollman * otherwise, send to ip_input() and mark as having been received on 2491902Swollman * the interface with that address. 2501902Swollman */ 2511902Swollmanstatic int 2521902Swollmandiv_output(struct socket *so, struct mbuf *m, 2531902Swollman struct sockaddr_in *sin, struct mbuf *control) 2541902Swollman{ 2551902Swollman int error = 0; 2561902Swollman struct m_hdr divert_tag; 2571902Swollman 2581902Swollman /* 2591902Swollman * Prepare the tag for divert info. Note that a packet 2601902Swollman * with a 0 tag in mh_data is effectively untagged, 2611902Swollman * so we could optimize that case. 2621902Swollman */ 2631902Swollman divert_tag.mh_type = MT_TAG; 2648870Srgrimes divert_tag.mh_flags = PACKET_TAG_DIVERT; 2651902Swollman divert_tag.mh_next = m; 2661902Swollman divert_tag.mh_data = 0; /* the matching rule # */ 2671902Swollman m->m_pkthdr.rcvif = NULL; /* XXX is it necessary ? */ 2681902Swollman 2691902Swollman#ifdef MAC 2701902Swollman mac_create_mbuf_from_socket(so, m); 2711902Swollman#endif 2721902Swollman 2731902Swollman if (control) 2741902Swollman m_freem(control); /* XXX */ 2751902Swollman 2761902Swollman /* Loopback avoidance and state recovery */ 2771902Swollman if (sin) { 27821062Speter int i; 2791902Swollman 2801902Swollman divert_tag.mh_data = (caddr_t)(int)sin->sin_port; 28121062Speter /* 28221062Speter * Find receive interface with the given name, stuffed 2831902Swollman * (if it exists) in the sin_zero[] field. 28421062Speter * The name is user supplied data so don't trust its size 2851902Swollman * or that it is zero terminated. 2861902Swollman */ 2871902Swollman for (i = 0; sin->sin_zero[i] && i < sizeof(sin->sin_zero); i++) 2881902Swollman ; 2891902Swollman if ( i > 0 && i < sizeof(sin->sin_zero)) 2901902Swollman m->m_pkthdr.rcvif = ifunit(sin->sin_zero); 2911902Swollman } 2921902Swollman 2931902Swollman /* Reinject packet into the system as incoming or outgoing */ 2941902Swollman if (!sin || sin->sin_addr.s_addr == 0) { 2951902Swollman struct inpcb *const inp = sotoinpcb(so); 2961902Swollman struct ip *const ip = mtod(m, struct ip *); 2971902Swollman 2981902Swollman /* 2991902Swollman * Don't allow both user specified and setsockopt options, 3001902Swollman * and don't allow packet length sizes that will crash 3011902Swollman */ 3021902Swollman if (((ip->ip_hl != (sizeof (*ip) >> 2)) && inp->inp_options) || 3031902Swollman ((u_short)ntohs(ip->ip_len) > m->m_pkthdr.len)) { 30421062Speter error = EINVAL; 3051902Swollman goto cantsend; 3061902Swollman } 3071902Swollman 3081902Swollman /* Convert fields to host order for ip_output() */ 3091902Swollman ip->ip_len = ntohs(ip->ip_len); 3101902Swollman ip->ip_off = ntohs(ip->ip_off); 3111902Swollman 3121902Swollman /* Send packet to output processing */ 3131902Swollman ipstat.ips_rawout++; /* XXX */ 3141902Swollman error = ip_output((struct mbuf *)&divert_tag, 3151902Swollman inp->inp_options, &inp->inp_route, 3161902Swollman (so->so_options & SO_DONTROUTE) | 31721062Speter IP_ALLOWBROADCAST | IP_RAWOUTPUT, 3181902Swollman inp->inp_moptions); 3191902Swollman } else { 3201902Swollman if (m->m_pkthdr.rcvif == NULL) { 3211902Swollman /* 3221902Swollman * No luck with the name, check by IP address. 3231902Swollman * Clear the port and the ifname to make sure 3241902Swollman * there are no distractions for ifa_ifwithaddr. 3251902Swollman */ 3261902Swollman struct ifaddr *ifa; 3271902Swollman 3281902Swollman bzero(sin->sin_zero, sizeof(sin->sin_zero)); 3291902Swollman sin->sin_port = 0; 3301902Swollman ifa = ifa_ifwithaddr((struct sockaddr *) sin); 3311902Swollman if (ifa == NULL) { 3321902Swollman error = EADDRNOTAVAIL; 3331902Swollman goto cantsend; 3341902Swollman } 3351902Swollman m->m_pkthdr.rcvif = ifa->ifa_ifp; 3361902Swollman } 3371902Swollman /* Send packet to input processing */ 3381902Swollman ip_input((struct mbuf *)&divert_tag); 3391902Swollman } 3401902Swollman 3411902Swollman return error; 3421902Swollman 3431902Swollmancantsend: 3441902Swollman m_freem(m); 3451902Swollman return error; 3461902Swollman} 3471902Swollman 3481902Swollmanstatic int 3491902Swollmandiv_attach(struct socket *so, int proto, struct thread *td) 3501902Swollman{ 3511902Swollman struct inpcb *inp; 3521902Swollman int error, s; 3531902Swollman 3541902Swollman inp = sotoinpcb(so); 3551902Swollman if (inp) 3561902Swollman panic("div_attach"); 3571902Swollman if (td && (error = suser(td)) != 0) 3581902Swollman return error; 35921062Speter 3601902Swollman error = soreserve(so, div_sendspace, div_recvspace); 3611902Swollman if (error) 3621902Swollman return error; 3631902Swollman s = splnet(); 3641902Swollman error = in_pcballoc(so, &divcbinfo, td); 36521062Speter splx(s); 3661902Swollman if (error) 3671902Swollman return error; 3681902Swollman inp = (struct inpcb *)so->so_pcb; 3691902Swollman inp->inp_ip_p = proto; 3701902Swollman inp->inp_vflag |= INP_IPV4; 37121062Speter inp->inp_flags |= INP_HDRINCL; 3721902Swollman /* The socket is always "connected" because 3731902Swollman we always know "where" to send the packet */ 3741902Swollman so->so_state |= SS_ISCONNECTED; 3751902Swollman return 0; 3761902Swollman} 3771902Swollman 3781902Swollmanstatic int 37921062Speterdiv_detach(struct socket *so) 3801902Swollman{ 3811902Swollman struct inpcb *inp; 3821902Swollman 3831902Swollman inp = sotoinpcb(so); 3841902Swollman if (inp == 0) 3851902Swollman panic("div_detach"); 3861902Swollman in_pcbdetach(inp); 3871902Swollman return 0; 3881902Swollman} 3891902Swollman 3901902Swollmanstatic int 3911902Swollmandiv_abort(struct socket *so) 3921902Swollman{ 3931902Swollman soisdisconnected(so); 3941902Swollman return div_detach(so); 3951902Swollman} 3961902Swollman 3971902Swollmanstatic int 3981902Swollmandiv_disconnect(struct socket *so) 3991902Swollman{ 4001902Swollman if ((so->so_state & SS_ISCONNECTED) == 0) 4011902Swollman return ENOTCONN; 4021902Swollman return div_abort(so); 4031902Swollman} 4041902Swollman 4051902Swollmanstatic int 4061902Swollmandiv_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 4071902Swollman{ 4081902Swollman struct inpcb *inp; 4091902Swollman int s; 4101902Swollman int error; 4111902Swollman 4121902Swollman s = splnet(); 4131902Swollman inp = sotoinpcb(so); 4141902Swollman /* in_pcbbind assumes that nam is a sockaddr_in 4151902Swollman * and in_pcbbind requires a valid address. Since divert 4161902Swollman * sockets don't we need to make sure the address is 4171902Swollman * filled in properly. 4181902Swollman * XXX -- divert should not be abusing in_pcbind 4191902Swollman * and should probably have its own family. 4201902Swollman */ 4211902Swollman if (nam->sa_family != AF_INET) 4221902Swollman error = EAFNOSUPPORT; 4231902Swollman else { 4241902Swollman ((struct sockaddr_in *)nam)->sin_addr.s_addr = INADDR_ANY; 4251902Swollman error = in_pcbbind(inp, nam, td); 4261902Swollman } 4278870Srgrimes splx(s); 4281902Swollman return error; 4291902Swollman} 4301902Swollman 4311902Swollmanstatic int 4321902Swollmandiv_shutdown(struct socket *so) 4331902Swollman{ 4341902Swollman socantsendmore(so); 4351902Swollman return 0; 4361902Swollman} 4371902Swollman 4381902Swollmanstatic int 4391902Swollmandiv_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 4401902Swollman struct mbuf *control, struct thread *td) 4411902Swollman{ 4421902Swollman /* Packet must have a header (but that's about it) */ 4431902Swollman if (m->m_len < sizeof (struct ip) && 4441902Swollman (m = m_pullup(m, sizeof (struct ip))) == 0) { 4451902Swollman ipstat.ips_toosmall++; 4461902Swollman m_freem(m); 4471902Swollman return EINVAL; 4481902Swollman } 4491902Swollman 4501902Swollman /* Send packet */ 4511902Swollman return div_output(so, m, (struct sockaddr_in *)nam, control); 4521902Swollman} 4531902Swollman 4541902Swollmanstatic int 4551902Swollmandiv_pcblist(SYSCTL_HANDLER_ARGS) 4561902Swollman{ 4571902Swollman int error, i, n, s; 4581902Swollman struct inpcb *inp, **inp_list; 4591902Swollman inp_gen_t gencnt; 4601902Swollman struct xinpgen xig; 4611902Swollman 4621902Swollman /* 46321062Speter * The process of preparing the TCB list is too time-consuming and 4641902Swollman * resource-intensive to repeat twice on every request. 4651902Swollman */ 4661902Swollman if (req->oldptr == 0) { 4671902Swollman n = divcbinfo.ipi_count; 4681902Swollman req->oldidx = 2 * (sizeof xig) 46921062Speter + (n + n/8) * sizeof(struct xinpcb); 4701902Swollman return 0; 47121062Speter } 47221062Speter 4731902Swollman if (req->newptr != 0) 4741902Swollman return EPERM; 4751902Swollman 4761902Swollman /* 4771902Swollman * OK, now we're committed to doing something. 4781902Swollman */ 4791902Swollman s = splnet(); 4801902Swollman gencnt = divcbinfo.ipi_gencnt; 4811902Swollman n = divcbinfo.ipi_count; 4821902Swollman splx(s); 4831902Swollman 4841902Swollman xig.xig_len = sizeof xig; 4851902Swollman xig.xig_count = n; 48621062Speter xig.xig_gen = gencnt; 48721062Speter xig.xig_sogen = so_gencnt; 4881902Swollman error = SYSCTL_OUT(req, &xig, sizeof xig); 4891902Swollman if (error) 4901902Swollman return error; 4911902Swollman 4921902Swollman inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK); 4931902Swollman if (inp_list == 0) 49421062Speter return ENOMEM; 49521062Speter 4961902Swollman s = splnet(); 4971902Swollman for (inp = LIST_FIRST(divcbinfo.listhead), i = 0; inp && i < n; 4981902Swollman inp = LIST_NEXT(inp, inp_list)) { 4991902Swollman if (inp->inp_gencnt <= gencnt && !prison_xinpcb(req->td, inp)) 5001902Swollman inp_list[i++] = inp; 5011902Swollman } 5021902Swollman splx(s); 5031902Swollman n = i; 50421062Speter 50521062Speter error = 0; 5061902Swollman for (i = 0; i < n; i++) { 5071902Swollman inp = inp_list[i]; 50821062Speter if (inp->inp_gencnt <= gencnt) { 5091902Swollman struct xinpcb xi; 5101902Swollman xi.xi_len = sizeof xi; 5111902Swollman /* XXX should avoid extra copy */ 5121902Swollman bcopy(inp, &xi.xi_inp, sizeof *inp); 5131902Swollman if (inp->inp_socket) 5141902Swollman sotoxsocket(inp->inp_socket, &xi.xi_socket); 5151902Swollman error = SYSCTL_OUT(req, &xi, sizeof xi); 5161902Swollman } 5171902Swollman } 5181902Swollman if (!error) { 5191902Swollman /* 5201902Swollman * Give the user an updated idea of our state. 5211902Swollman * If the generation differs from what we told 5221902Swollman * her before, she knows that something happened 5231902Swollman * while we were processing this request, and it 5241902Swollman * might be necessary to retry. 52521062Speter */ 5261902Swollman s = splnet(); 5271902Swollman xig.xig_gen = divcbinfo.ipi_gencnt; 52821062Speter xig.xig_sogen = so_gencnt; 5291902Swollman xig.xig_count = divcbinfo.ipi_count; 5301902Swollman splx(s); 5311902Swollman error = SYSCTL_OUT(req, &xig, sizeof xig); 5321902Swollman } 5331902Swollman free(inp_list, M_TEMP); 5341902Swollman return error; 53521062Speter} 5361902Swollman 5371902Swollman/* 5381902Swollman * This is the wrapper function for in_setsockaddr. We just pass down 5391902Swollman * the pcbinfo for in_setpeeraddr to lock. 5401902Swollman */ 5411902Swollmanstatic int 5421902Swollmandiv_sockaddr(struct socket *so, struct sockaddr **nam) 5431902Swollman{ 5441902Swollman return (in_setsockaddr(so, nam, &divcbinfo)); 5451902Swollman} 5461902Swollman 54721062Speter/* 5481902Swollman * This is the wrapper function for in_setpeeraddr. We just pass down 5491902Swollman * the pcbinfo for in_setpeeraddr to lock. 5501902Swollman */ 5511902Swollmanstatic int 5521902Swollmandiv_peeraddr(struct socket *so, struct sockaddr **nam) 55336087Swpaul{ 55436087Swpaul return (in_setpeeraddr(so, nam, &divcbinfo)); 55536257Swpaul} 55636257Swpaul 55736257Swpaul 55836257SwpaulSYSCTL_DECL(_net_inet_divert); 55936257SwpaulSYSCTL_PROC(_net_inet_divert, OID_AUTO, pcblist, CTLFLAG_RD, 0, 0, 56036087Swpaul div_pcblist, "S,xinpcb", "List of active divert sockets"); 56136257Swpaul 56236087Swpaulstruct pr_usrreqs div_usrreqs = { 5631902Swollman div_abort, pru_accept_notsupp, div_attach, div_bind, 5641902Swollman pru_connect_notsupp, pru_connect2_notsupp, in_control, div_detach, 5651902Swollman div_disconnect, pru_listen_notsupp, div_peeraddr, pru_rcvd_notsupp, 5661902Swollman pru_rcvoob_notsupp, div_send, pru_sense_null, div_shutdown, 5671902Swollman div_sockaddr, sosend, soreceive, sopoll 5681902Swollman}; 5691902Swollman