ng_socket.c revision 70784
152419Sjulian 252419Sjulian/* 352419Sjulian * ng_socket.c 452419Sjulian * 552419Sjulian * Copyright (c) 1996-1999 Whistle Communications, Inc. 652419Sjulian * All rights reserved. 770784Sjulian * 852419Sjulian * Subject to the following obligations and disclaimer of warranty, use and 952419Sjulian * redistribution of this software, in source or object code forms, with or 1052419Sjulian * without modifications are expressly permitted by Whistle Communications; 1152419Sjulian * provided, however, that: 1252419Sjulian * 1. Any and all reproductions of the source or object code must include the 1352419Sjulian * copyright notice above and the following disclaimer of warranties; and 1452419Sjulian * 2. No rights are granted, in any manner or form, to use Whistle 1552419Sjulian * Communications, Inc. trademarks, including the mark "WHISTLE 1652419Sjulian * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 1752419Sjulian * such appears in the above copyright notice or in the software. 1870784Sjulian * 1952419Sjulian * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 2052419Sjulian * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 2152419Sjulian * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 2252419Sjulian * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 2352419Sjulian * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 2452419Sjulian * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 2552419Sjulian * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 2652419Sjulian * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 2752419Sjulian * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 2852419Sjulian * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 2952419Sjulian * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 3052419Sjulian * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 3152419Sjulian * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 3252419Sjulian * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3352419Sjulian * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 3452419Sjulian * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 3552419Sjulian * OF SUCH DAMAGE. 3652419Sjulian * 3767506Sjulian * Author: Julian Elischer <julian@freebsd.org> 3852419Sjulian * 3952419Sjulian * $FreeBSD: head/sys/netgraph/ng_socket.c 70784 2001-01-08 05:34:06Z julian $ 4052752Sjulian * $Whistle: ng_socket.c,v 1.28 1999/11/01 09:24:52 julian Exp $ 4152419Sjulian */ 4252419Sjulian 4352419Sjulian/* 4452419Sjulian * Netgraph socket nodes 4552419Sjulian * 4652419Sjulian * There are two types of netgraph sockets, control and data. 4752419Sjulian * Control sockets have a netgraph node, but data sockets are 4852419Sjulian * parasitic on control sockets, and have no node of their own. 4952419Sjulian */ 5052419Sjulian 5152419Sjulian#include <sys/param.h> 5252419Sjulian#include <sys/systm.h> 5352419Sjulian#include <sys/domain.h> 5452419Sjulian#include <sys/errno.h> 5552419Sjulian#include <sys/kernel.h> 5652419Sjulian#include <sys/filedesc.h> 5752419Sjulian#include <sys/malloc.h> 5852419Sjulian#include <sys/queue.h> 5952419Sjulian#include <sys/mbuf.h> 6052419Sjulian#include <sys/protosw.h> 6152419Sjulian#include <sys/socket.h> 6252419Sjulian#include <sys/socketvar.h> 6352419Sjulian#include <sys/sysctl.h> 6452419Sjulian#ifdef NOTYET 6552419Sjulian#include <sys/vnode.h> 6652419Sjulian#endif 6752419Sjulian#include <netgraph/ng_message.h> 6852419Sjulian#include <netgraph/netgraph.h> 6952919Sjulian#include <netgraph/ng_socketvar.h> 7052419Sjulian#include <netgraph/ng_socket.h> 7152419Sjulian 7252419Sjulian/* 7352419Sjulian * It's Ascii-art time! 7452419Sjulian * +-------------+ +-------------+ 7552419Sjulian * |socket (ctl)| |socket (data)| 7652419Sjulian * +-------------+ +-------------+ 7752419Sjulian * ^ ^ 7852419Sjulian * | | 7952419Sjulian * v v 8052419Sjulian * +-----------+ +-----------+ 8152419Sjulian * |pcb (ctl)| |pcb (data)| 8252419Sjulian * +-----------+ +-----------+ 8352419Sjulian * ^ ^ 8452419Sjulian * | | 8552419Sjulian * v v 8652419Sjulian * +--------------------------+ 8752419Sjulian * | Socket type private | 8852419Sjulian * | data | 8952419Sjulian * +--------------------------+ 9052419Sjulian * ^ 9152419Sjulian * | 9252419Sjulian * v 9352419Sjulian * +----------------+ 9452419Sjulian * | struct ng_node | 9552419Sjulian * +----------------+ 9652419Sjulian */ 9752419Sjulian 9852419Sjulian/* Netgraph node methods */ 9952752Sjulianstatic ng_constructor_t ngs_constructor; 10052752Sjulianstatic ng_rcvmsg_t ngs_rcvmsg; 10170700Sjulianstatic ng_shutdown_t ngs_shutdown; 10252752Sjulianstatic ng_newhook_t ngs_newhook; 10352752Sjulianstatic ng_rcvdata_t ngs_rcvdata; 10452885Sjulianstatic ng_disconnect_t ngs_disconnect; 10552419Sjulian 10652419Sjulian/* Internal methods */ 10752419Sjulianstatic int ng_attach_data(struct socket *so); 10852419Sjulianstatic int ng_attach_cntl(struct socket *so); 10952419Sjulianstatic int ng_attach_common(struct socket *so, int type); 11052419Sjulianstatic void ng_detach_common(struct ngpcb *pcbp, int type); 11152419Sjulian/*static int ng_internalize(struct mbuf *m, struct proc *p); */ 11252419Sjulian 11352419Sjulianstatic int ng_connect_data(struct sockaddr *nam, struct ngpcb *pcbp); 11452419Sjulianstatic int ng_bind(struct sockaddr *nam, struct ngpcb *pcbp); 11552419Sjulian 11652419Sjulianstatic int ngs_mod_event(module_t mod, int event, void *data); 11752419Sjulianstatic int ship_msg(struct ngpcb *pcbp, struct ng_mesg *msg, 11852419Sjulian struct sockaddr_ng *addr); 11952419Sjulian 12052419Sjulian/* Netgraph type descriptor */ 12152419Sjulianstatic struct ng_type typestruct = { 12270159Sjulian NG_ABI_VERSION, 12352419Sjulian NG_SOCKET_NODE_TYPE, 12452419Sjulian ngs_mod_event, 12552419Sjulian ngs_constructor, 12652419Sjulian ngs_rcvmsg, 12770700Sjulian ngs_shutdown, 12852419Sjulian ngs_newhook, 12952419Sjulian NULL, 13052419Sjulian NULL, 13152419Sjulian ngs_rcvdata, 13253913Sarchie ngs_disconnect, 13353913Sarchie NULL 13452419Sjulian}; 13552419SjulianNETGRAPH_INIT(socket, &typestruct); 13652419Sjulian 13752419Sjulian/* Buffer space */ 13864512Sarchiestatic u_long ngpdg_sendspace = 20 * 1024; /* really max datagram size */ 13952419Sjulianstatic u_long ngpdg_recvspace = 20 * 1024; 14052419Sjulian 14152419Sjulian/* List of all sockets */ 14260938SjakeLIST_HEAD(, ngpcb) ngsocklist; 14352419Sjulian 14453526Sjulian#define sotongpcb(so) ((struct ngpcb *)(so)->so_pcb) 14552419Sjulian 14652419Sjulian/* If getting unexplained errors returned, set this to "Debugger("X"); */ 14752419Sjulian#ifndef TRAP_ERROR 14852419Sjulian#define TRAP_ERROR 14952419Sjulian#endif 15052419Sjulian 15152419Sjulian/*************************************************************** 15252419Sjulian Control sockets 15352419Sjulian***************************************************************/ 15452419Sjulian 15552419Sjulianstatic int 15652419Sjulianngc_attach(struct socket *so, int proto, struct proc *p) 15752419Sjulian{ 15852419Sjulian struct ngpcb *const pcbp = sotongpcb(so); 15952419Sjulian 16053532Sjulian if (suser(p)) 16153530Sjulian return (EPERM); 16252419Sjulian if (pcbp != NULL) 16352419Sjulian return (EISCONN); 16452419Sjulian return (ng_attach_cntl(so)); 16552419Sjulian} 16652419Sjulian 16752419Sjulianstatic int 16852419Sjulianngc_detach(struct socket *so) 16952419Sjulian{ 17052419Sjulian struct ngpcb *const pcbp = sotongpcb(so); 17152419Sjulian 17252419Sjulian if (pcbp == NULL) 17352419Sjulian return (EINVAL); 17452419Sjulian ng_detach_common(pcbp, NG_CONTROL); 17552419Sjulian return (0); 17652419Sjulian} 17752419Sjulian 17852419Sjulianstatic int 17952419Sjulianngc_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 18052419Sjulian struct mbuf *control, struct proc *p) 18152419Sjulian{ 18252419Sjulian struct ngpcb *const pcbp = sotongpcb(so); 18352419Sjulian struct sockaddr_ng *const sap = (struct sockaddr_ng *) addr; 18470700Sjulian struct ng_mesg *msg; 18552419Sjulian struct mbuf *m0; 18670700Sjulian char *path = NULL; 18752419Sjulian int len, error = 0; 18852419Sjulian 18952419Sjulian if (pcbp == NULL) { 19052419Sjulian error = EINVAL; 19152419Sjulian goto release; 19252419Sjulian } 19352419Sjulian#ifdef NOTYET 19452419Sjulian if (control && (error = ng_internalize(control, p))) { 19552419Sjulian if (pcbp->sockdata == NULL) { 19652419Sjulian error = ENOTCONN; 19752419Sjulian goto release; 19852419Sjulian } 19952419Sjulian } 20052419Sjulian#else /* NOTYET */ 20152419Sjulian if (control) { 20252419Sjulian error = EINVAL; 20352419Sjulian goto release; 20452419Sjulian } 20552419Sjulian#endif /* NOTYET */ 20652419Sjulian 20752419Sjulian /* Require destination as there may be >= 1 hooks on this node */ 20852419Sjulian if (addr == NULL) { 20952419Sjulian error = EDESTADDRREQ; 21052419Sjulian goto release; 21152419Sjulian } 21252419Sjulian 21352419Sjulian /* Allocate an expendable buffer for the path, chop off 21452419Sjulian * the sockaddr header, and make sure it's NUL terminated */ 21552419Sjulian len = sap->sg_len - 2; 21652419Sjulian MALLOC(path, char *, len + 1, M_NETGRAPH, M_WAITOK); 21752419Sjulian if (path == NULL) { 21852419Sjulian error = ENOMEM; 21952419Sjulian goto release; 22052419Sjulian } 22152419Sjulian bcopy(sap->sg_data, path, len); 22252419Sjulian path[len] = '\0'; 22352419Sjulian 22452419Sjulian /* Move the actual message out of mbufs into a linear buffer. 22552419Sjulian * Start by adding up the size of the data. (could use mh_len?) */ 22652419Sjulian for (len = 0, m0 = m; m0 != NULL; m0 = m0->m_next) 22752419Sjulian len += m0->m_len; 22852419Sjulian 22952419Sjulian /* Move the data into a linear buffer as well. Messages are not 23052419Sjulian * delivered in mbufs. */ 23170700Sjulian MALLOC(msg, struct ng_mesg *, len + 1, M_NETGRAPH_MSG, M_WAITOK); 23252419Sjulian if (msg == NULL) { 23352419Sjulian error = ENOMEM; 23452419Sjulian goto release; 23552419Sjulian } 23670700Sjulian m_copydata(m, 0, len, (char *)msg); 23752419Sjulian 23870784Sjulian#ifdef TRACE_MESSAGES 23970784Sjulian do { 24070784Sjulian item_p item; 24170784Sjulian if ((item = ng_package_msg(msg)) == NULL) { 24270784Sjulian (msg) = NULL; 24370784Sjulian (error) = ENOMEM; 24470784Sjulianprintf("err=%d\n",error); 24570784Sjulian break; 24670784Sjulian } 24770784Sjulian if (((error) = ng_address_path((pcbp->sockdata->node), (item), 24870784Sjulian (path), (NULL))) == 0) { 24970784Sjulianprintf("[%x]:<---------[socket]: c=<%d>cmd=%x(%s) f=%x #%d (%s)\n", 25070784Sjulianitem->el_dest->nd_ID, 25170784Sjulianmsg->header.typecookie, 25270784Sjulianmsg->header.cmd, 25370784Sjulianmsg->header.cmdstr, 25470784Sjulianmsg->header.flags, 25570784Sjulianmsg->header.token, 25670784Sjulianitem->el_dest->nd_type->name); 25770784Sjulian SAVE_LINE(item); 25870784Sjulian (error) = ng_snd_item((item), 0); 25970784Sjulian } 26070784Sjulianelse { 26170784Sjulianprintf("errx=%d\n",error); 26270784Sjulian} 26370784Sjulian (msg) = NULL; 26470784Sjulian } while (0); 26570784Sjulian 26670784Sjulian#else 26770700Sjulian /* The callee will free the msg when done. The path is our business. */ 26870700Sjulian NG_SEND_MSG_PATH(error, pcbp->sockdata->node, msg, path, NULL); 26970784Sjulian#endif 27052419Sjulianrelease: 27152419Sjulian if (path != NULL) 27252419Sjulian FREE(path, M_NETGRAPH); 27352419Sjulian if (control != NULL) 27452419Sjulian m_freem(control); 27552419Sjulian if (m != NULL) 27652419Sjulian m_freem(m); 27752419Sjulian return (error); 27852419Sjulian} 27952419Sjulian 28052419Sjulianstatic int 28152419Sjulianngc_bind(struct socket *so, struct sockaddr *nam, struct proc *p) 28252419Sjulian{ 28352419Sjulian struct ngpcb *const pcbp = sotongpcb(so); 28452419Sjulian 28552419Sjulian if (pcbp == 0) 28652419Sjulian return (EINVAL); 28752419Sjulian return (ng_bind(nam, pcbp)); 28852419Sjulian} 28952419Sjulian 29052419Sjulianstatic int 29152419Sjulianngc_connect(struct socket *so, struct sockaddr *nam, struct proc *p) 29252419Sjulian{ 29370784Sjulianprintf(" program tried to connect control socket to remote node\n "); 29470700Sjulian /* 29570784Sjulian * At this time refuse to do this.. it used to 29670700Sjulian * do something but it was undocumented and not used. 29770700Sjulian */ 29870700Sjulian return (EINVAL); 29952419Sjulian} 30052419Sjulian 30152419Sjulian/*************************************************************** 30252419Sjulian Data sockets 30352419Sjulian***************************************************************/ 30452419Sjulian 30552419Sjulianstatic int 30652419Sjulianngd_attach(struct socket *so, int proto, struct proc *p) 30752419Sjulian{ 30852419Sjulian struct ngpcb *const pcbp = sotongpcb(so); 30952419Sjulian 31052419Sjulian if (pcbp != NULL) 31152419Sjulian return (EISCONN); 31252419Sjulian return (ng_attach_data(so)); 31352419Sjulian} 31452419Sjulian 31552419Sjulianstatic int 31652419Sjulianngd_detach(struct socket *so) 31752419Sjulian{ 31852419Sjulian struct ngpcb *const pcbp = sotongpcb(so); 31952419Sjulian 32052419Sjulian if (pcbp == NULL) 32152419Sjulian return (EINVAL); 32252419Sjulian ng_detach_common(pcbp, NG_DATA); 32352419Sjulian return (0); 32452419Sjulian} 32552419Sjulian 32652419Sjulianstatic int 32752419Sjulianngd_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 32852419Sjulian struct mbuf *control, struct proc *p) 32952419Sjulian{ 33052419Sjulian struct ngpcb *const pcbp = sotongpcb(so); 33152419Sjulian struct sockaddr_ng *const sap = (struct sockaddr_ng *) addr; 33252419Sjulian int len, error; 33353498Sjulian hook_p hook = NULL; 33453498Sjulian char hookname[NG_HOOKLEN + 1]; 33552419Sjulian 33652419Sjulian if ((pcbp == NULL) || (control != NULL)) { 33752419Sjulian error = EINVAL; 33852419Sjulian goto release; 33952419Sjulian } 34052419Sjulian if (pcbp->sockdata == NULL) { 34152419Sjulian error = ENOTCONN; 34252419Sjulian goto release; 34352419Sjulian } 34453498Sjulian /* 34553498Sjulian * If the user used any of these ways to not specify an address 34653498Sjulian * then handle specially. 34753498Sjulian */ 34853498Sjulian if ((sap == NULL) 34953498Sjulian || ((len = sap->sg_len) <= 2) 35053498Sjulian || (*sap->sg_data == '\0')) { 35170784Sjulian if (NG_NODE_NUMHOOKS(pcbp->sockdata->node) != 1) { 35253498Sjulian error = EDESTADDRREQ; 35353498Sjulian goto release; 35453498Sjulian } 35553498Sjulian /* 35653498Sjulian * if exactly one hook exists, just use it. 35753498Sjulian * Special case to allow write(2) to work on an ng_socket. 35853498Sjulian */ 35970784Sjulian hook = LIST_FIRST(&pcbp->sockdata->node->nd_hooks); 36053498Sjulian } else { 36153498Sjulian if (len > NG_HOOKLEN) { 36253498Sjulian error = EINVAL; 36353498Sjulian goto release; 36453498Sjulian } 36552419Sjulian 36653498Sjulian /* 36753498Sjulian * chop off the sockaddr header, and make sure it's NUL 36853498Sjulian * terminated 36953498Sjulian */ 37053498Sjulian bcopy(sap->sg_data, hookname, len); 37153498Sjulian hookname[len] = '\0'; 37252419Sjulian 37353498Sjulian /* Find the correct hook from 'hookname' */ 37470784Sjulian LIST_FOREACH(hook, &pcbp->sockdata->node->nd_hooks, hk_hooks) { 37570784Sjulian if (strcmp(hookname, NG_HOOK_NAME(hook)) == 0) 37653498Sjulian break; 37753498Sjulian } 37853498Sjulian if (hook == NULL) 37953498Sjulian error = EHOSTUNREACH; 38052419Sjulian } 38152419Sjulian 38252419Sjulian /* Send data (OK if hook is NULL) */ 38369922Sjulian NG_SEND_DATA_ONLY(error, hook, m); /* makes m NULL */ 38452419Sjulian 38552419Sjulianrelease: 38652419Sjulian if (control != NULL) 38752419Sjulian m_freem(control); 38852419Sjulian if (m != NULL) 38952419Sjulian m_freem(m); 39052419Sjulian return (error); 39152419Sjulian} 39252419Sjulian 39352419Sjulianstatic int 39452419Sjulianngd_connect(struct socket *so, struct sockaddr *nam, struct proc *p) 39552419Sjulian{ 39652419Sjulian struct ngpcb *const pcbp = sotongpcb(so); 39752419Sjulian 39852419Sjulian if (pcbp == 0) 39952419Sjulian return (EINVAL); 40052419Sjulian return (ng_connect_data(nam, pcbp)); 40152419Sjulian} 40252419Sjulian 40352419Sjulian/* 40452419Sjulian * Used for both data and control sockets 40552419Sjulian */ 40652419Sjulianstatic int 40752419Sjulianng_setsockaddr(struct socket *so, struct sockaddr **addr) 40852419Sjulian{ 40953098Sbrian struct ngpcb *pcbp; 41053098Sbrian struct sockaddr_ng *sg; 41153098Sbrian int sg_len, namelen, s; 41252419Sjulian 41353098Sbrian /* Why isn't sg_data a `char[1]' ? :-( */ 41453098Sbrian sg_len = sizeof(struct sockaddr_ng) - sizeof(sg->sg_data) + 1; 41553098Sbrian 41653098Sbrian s = splnet(); 41753098Sbrian pcbp = sotongpcb(so); 41869922Sjulian if ((pcbp == NULL) || (pcbp->sockdata == NULL)) { 41953098Sbrian splx(s); 42052419Sjulian return (EINVAL); 42153098Sbrian } 42253098Sbrian 42353098Sbrian namelen = 0; /* silence compiler ! */ 42470784Sjulian if ( NG_NODE_HAS_NAME(pcbp->sockdata->node)) 42570784Sjulian sg_len += namelen = strlen(NG_NODE_NAME(pcbp->sockdata->node)); 42653098Sbrian 42768876Sdwmalone MALLOC(sg, struct sockaddr_ng *, sg_len, M_SONAME, M_WAITOK | M_ZERO); 42853098Sbrian 42970784Sjulian if (NG_NODE_HAS_NAME(pcbp->sockdata->node)) 43070784Sjulian bcopy(NG_NODE_NAME(pcbp->sockdata->node), sg->sg_data, namelen); 43153098Sbrian splx(s); 43253098Sbrian 43353098Sbrian sg->sg_len = sg_len; 43453098Sbrian sg->sg_family = AF_NETGRAPH; 43553098Sbrian *addr = (struct sockaddr *)sg; 43653098Sbrian 43752419Sjulian return (0); 43852419Sjulian} 43952419Sjulian 44052419Sjulian/* 44152419Sjulian * Attach a socket to it's protocol specific partner. 44252419Sjulian * For a control socket, actually create a netgraph node and attach 44352419Sjulian * to it as well. 44452419Sjulian */ 44552419Sjulian 44652419Sjulianstatic int 44752419Sjulianng_attach_cntl(struct socket *so) 44852419Sjulian{ 44952419Sjulian struct ngsock *privdata; 45052419Sjulian struct ngpcb *pcbp; 45152419Sjulian int error; 45252419Sjulian 45352419Sjulian /* Setup protocol control block */ 45452419Sjulian if ((error = ng_attach_common(so, NG_CONTROL)) != 0) 45552419Sjulian return (error); 45653526Sjulian pcbp = sotongpcb(so); 45752419Sjulian 45852419Sjulian /* Allocate node private info */ 45952419Sjulian MALLOC(privdata, struct ngsock *, 46068876Sdwmalone sizeof(*privdata), M_NETGRAPH, M_WAITOK | M_ZERO); 46152419Sjulian if (privdata == NULL) { 46252419Sjulian ng_detach_common(pcbp, NG_CONTROL); 46352419Sjulian return (ENOMEM); 46452419Sjulian } 46552419Sjulian 46652419Sjulian /* Make the generic node components */ 46752419Sjulian if ((error = ng_make_node_common(&typestruct, &privdata->node)) != 0) { 46852419Sjulian FREE(privdata, M_NETGRAPH); 46952419Sjulian ng_detach_common(pcbp, NG_CONTROL); 47052419Sjulian return (error); 47152419Sjulian } 47270784Sjulian NG_NODE_SET_PRIVATE(privdata->node, privdata); 47352419Sjulian 47452419Sjulian /* Link the pcb and the node private data */ 47552419Sjulian privdata->ctlsock = pcbp; 47652419Sjulian pcbp->sockdata = privdata; 47752419Sjulian privdata->refs++; 47852419Sjulian return (0); 47952419Sjulian} 48052419Sjulian 48152419Sjulianstatic int 48252419Sjulianng_attach_data(struct socket *so) 48352419Sjulian{ 48452419Sjulian return(ng_attach_common(so, NG_DATA)); 48552419Sjulian} 48652419Sjulian 48752419Sjulian/* 48852419Sjulian * Set up a socket protocol control block. 48952419Sjulian * This code is shared between control and data sockets. 49052419Sjulian */ 49152419Sjulianstatic int 49252419Sjulianng_attach_common(struct socket *so, int type) 49352419Sjulian{ 49452419Sjulian struct ngpcb *pcbp; 49552419Sjulian int error; 49652419Sjulian 49752419Sjulian /* Standard socket setup stuff */ 49852419Sjulian error = soreserve(so, ngpdg_sendspace, ngpdg_recvspace); 49952419Sjulian if (error) 50052419Sjulian return (error); 50152419Sjulian 50252419Sjulian /* Allocate the pcb */ 50368876Sdwmalone MALLOC(pcbp, struct ngpcb *, sizeof(*pcbp), M_PCB, M_WAITOK | M_ZERO); 50452419Sjulian if (pcbp == NULL) 50552419Sjulian return (ENOMEM); 50652419Sjulian pcbp->type = type; 50752419Sjulian 50852419Sjulian /* Link the pcb and the socket */ 50952419Sjulian so->so_pcb = (caddr_t) pcbp; 51052419Sjulian pcbp->ng_socket = so; 51152419Sjulian 51252419Sjulian /* Add the socket to linked list */ 51352419Sjulian LIST_INSERT_HEAD(&ngsocklist, pcbp, socks); 51452419Sjulian return (0); 51552419Sjulian} 51652419Sjulian 51752419Sjulian/* 51852419Sjulian * Disassociate the socket from it's protocol specific 51952419Sjulian * partner. If it's attached to a node's private data structure, 52052419Sjulian * then unlink from that too. If we were the last socket attached to it, 52152419Sjulian * then shut down the entire node. Shared code for control and data sockets. 52252419Sjulian */ 52352419Sjulianstatic void 52452419Sjulianng_detach_common(struct ngpcb *pcbp, int which) 52552419Sjulian{ 52652419Sjulian struct ngsock *sockdata; 52752419Sjulian 52852419Sjulian if (pcbp->sockdata) { 52952419Sjulian sockdata = pcbp->sockdata; 53052419Sjulian pcbp->sockdata = NULL; 53152419Sjulian switch (which) { 53252419Sjulian case NG_CONTROL: 53352419Sjulian sockdata->ctlsock = NULL; 53452419Sjulian break; 53552419Sjulian case NG_DATA: 53652419Sjulian sockdata->datasock = NULL; 53752419Sjulian break; 53852419Sjulian default: 53952419Sjulian panic(__FUNCTION__); 54052419Sjulian } 54152419Sjulian if ((--sockdata->refs == 0) && (sockdata->node != NULL)) 54270700Sjulian ng_rmnode_self(sockdata->node); 54352419Sjulian } 54452419Sjulian pcbp->ng_socket->so_pcb = NULL; 54552419Sjulian pcbp->ng_socket = NULL; 54652419Sjulian LIST_REMOVE(pcbp, socks); 54752419Sjulian FREE(pcbp, M_PCB); 54852419Sjulian} 54952419Sjulian 55052419Sjulian#ifdef NOTYET 55152419Sjulian/* 55252419Sjulian * File descriptors can be passed into a AF_NETGRAPH socket. 55352419Sjulian * Note, that file descriptors cannot be passed OUT. 55452419Sjulian * Only character device descriptors are accepted. 55552419Sjulian * Character devices are useful to connect a graph to a device, 55652419Sjulian * which after all is the purpose of this whole system. 55752419Sjulian */ 55852419Sjulianstatic int 55952419Sjulianng_internalize(struct mbuf *control, struct proc *p) 56052419Sjulian{ 56152419Sjulian struct filedesc *fdp = p->p_fd; 56252419Sjulian struct cmsghdr *cm = mtod(control, struct cmsghdr *); 56352419Sjulian struct file *fp; 56452419Sjulian struct vnode *vn; 56552419Sjulian int oldfds; 56652419Sjulian int fd; 56752419Sjulian 56852419Sjulian if (cm->cmsg_type != SCM_RIGHTS || cm->cmsg_level != SOL_SOCKET || 56952419Sjulian cm->cmsg_len != control->m_len) { 57052419Sjulian TRAP_ERROR; 57152419Sjulian return (EINVAL); 57252419Sjulian } 57352419Sjulian 57452419Sjulian /* Check there is only one FD. XXX what would more than one signify? */ 57552419Sjulian oldfds = (cm->cmsg_len - sizeof(*cm)) / sizeof(int); 57652419Sjulian if (oldfds != 1) { 57752419Sjulian TRAP_ERROR; 57852419Sjulian return (EINVAL); 57952419Sjulian } 58052419Sjulian 58152419Sjulian /* Check that the FD given is legit. and change it to a pointer to a 58252419Sjulian * struct file. */ 58352419Sjulian fd = *(int *) (cm + 1); 58452419Sjulian if ((unsigned) fd >= fdp->fd_nfiles 58552419Sjulian || (fp = fdp->fd_ofiles[fd]) == NULL) { 58652419Sjulian return (EBADF); 58752419Sjulian } 58852419Sjulian 58952419Sjulian /* Depending on what kind of resource it is, act differently. For 59052419Sjulian * devices, we treat it as a file. For a AF_NETGRAPH socket, 59152419Sjulian * shortcut straight to the node. */ 59252419Sjulian switch (fp->f_type) { 59352419Sjulian case DTYPE_VNODE: 59452419Sjulian vn = (struct vnode *) fp->f_data; 59552419Sjulian if (vn && (vn->v_type == VCHR)) { 59652419Sjulian /* for a VCHR, actually reference the FILE */ 59752419Sjulian fp->f_count++; 59852419Sjulian /* XXX then what :) */ 59952419Sjulian /* how to pass on to other modules? */ 60052419Sjulian } else { 60152419Sjulian TRAP_ERROR; 60252419Sjulian return (EINVAL); 60352419Sjulian } 60452419Sjulian break; 60552419Sjulian default: 60652419Sjulian TRAP_ERROR; 60752419Sjulian return (EINVAL); 60852419Sjulian } 60952419Sjulian return (0); 61052419Sjulian} 61152419Sjulian#endif /* NOTYET */ 61252419Sjulian 61352419Sjulian/* 61452419Sjulian * Connect the data socket to a named control socket node. 61552419Sjulian */ 61652419Sjulianstatic int 61752419Sjulianng_connect_data(struct sockaddr *nam, struct ngpcb *pcbp) 61852419Sjulian{ 61952419Sjulian struct sockaddr_ng *sap; 62052419Sjulian node_p farnode; 62152419Sjulian struct ngsock *sockdata; 62252419Sjulian int error; 62370700Sjulian item_p item; 62452419Sjulian 62552419Sjulian /* If we are already connected, don't do it again */ 62652419Sjulian if (pcbp->sockdata != NULL) 62752419Sjulian return (EISCONN); 62852419Sjulian 62952419Sjulian /* Find the target (victim) and check it doesn't already have a data 63070700Sjulian * socket. Also check it is a 'socket' type node. 63170700Sjulian * Use ng_package_data() and address_path() to do this. 63270700Sjulian */ 63370700Sjulian 63452419Sjulian sap = (struct sockaddr_ng *) nam; 63570700Sjulian /* The item will hold the node reference */ 63670700Sjulian item = ng_package_data(NULL, NULL); 63770700Sjulian if (item == NULL) { 63870700Sjulian return (ENOMEM); 63970700Sjulian } 64070700Sjulian if ((error = ng_address_path(NULL, item, sap->sg_data, NULL))) 64170700Sjulian return (error); /* item is freed on failure */ 64252419Sjulian 64370700Sjulian /* 64470784Sjulian * Extract node from item and free item. Remember we now have 64570700Sjulian * a reference on the node. The item holds it for us. 64670700Sjulian * when we free the item we release the reference. 64770700Sjulian */ 64870700Sjulian farnode = item->el_dest; /* shortcut */ 64970784Sjulian if (strcmp(farnode->nd_type->name, NG_SOCKET_NODE_TYPE) != 0) { 65070700Sjulian NG_FREE_ITEM(item); /* drop the reference to the node */ 65152419Sjulian return (EINVAL); 65270700Sjulian } 65370784Sjulian sockdata = NG_NODE_PRIVATE(farnode); 65470700Sjulian if (sockdata->datasock != NULL) { 65570700Sjulian NG_FREE_ITEM(item); /* drop the reference to the node */ 65652419Sjulian return (EADDRINUSE); 65770700Sjulian } 65852419Sjulian 65970700Sjulian /* 66070700Sjulian * Link the PCB and the private data struct. and note the extra 66170700Sjulian * reference. Drop the extra reference on the node. 66270700Sjulian */ 66352419Sjulian sockdata->datasock = pcbp; 66452419Sjulian pcbp->sockdata = sockdata; 66570700Sjulian sockdata->refs++; /* XXX possible race if it's being freed */ 66670700Sjulian NG_FREE_ITEM(item); /* drop the reference to the node */ 66752419Sjulian return (0); 66852419Sjulian} 66952419Sjulian 67052419Sjulian/* 67152419Sjulian * Binding a socket means giving the corresponding node a name 67252419Sjulian */ 67352419Sjulianstatic int 67452419Sjulianng_bind(struct sockaddr *nam, struct ngpcb *pcbp) 67552419Sjulian{ 67652419Sjulian struct ngsock *const sockdata = pcbp->sockdata; 67752419Sjulian struct sockaddr_ng *const sap = (struct sockaddr_ng *) nam; 67852419Sjulian 67952419Sjulian if (sockdata == NULL) { 68052419Sjulian TRAP_ERROR; 68152419Sjulian return (EINVAL); 68252419Sjulian } 68369922Sjulian if ((sap->sg_len < 4) 68469922Sjulian || (sap->sg_len > (NG_NODELEN + 3)) 68569922Sjulian || (sap->sg_data[0] == '\0') 68669922Sjulian || (sap->sg_data[sap->sg_len - 3] != '\0')) { 68752419Sjulian TRAP_ERROR; 68852419Sjulian return (EINVAL); 68952419Sjulian } 69052419Sjulian return (ng_name_node(sockdata->node, sap->sg_data)); 69152419Sjulian} 69252419Sjulian 69352419Sjulian/* 69452419Sjulian * Take a message and pass it up to the control socket associated 69552419Sjulian * with the node. 69652419Sjulian */ 69752419Sjulianstatic int 69852419Sjulianship_msg(struct ngpcb *pcbp, struct ng_mesg *msg, struct sockaddr_ng *addr) 69952419Sjulian{ 70052419Sjulian struct socket *const so = pcbp->ng_socket; 70152419Sjulian struct mbuf *mdata; 70252419Sjulian int msglen; 70352419Sjulian 70452419Sjulian /* Copy the message itself into an mbuf chain */ 70552419Sjulian msglen = sizeof(struct ng_mesg) + msg->header.arglen; 70652419Sjulian mdata = m_devget((caddr_t) msg, msglen, 0, NULL, NULL); 70752419Sjulian 70852419Sjulian /* Here we free the message, as we are the end of the line. 70952419Sjulian * We need to do that regardless of whether we got mbufs. */ 71070700Sjulian NG_FREE_MSG(msg); 71152419Sjulian 71252419Sjulian if (mdata == NULL) { 71352419Sjulian TRAP_ERROR; 71452419Sjulian return (ENOBUFS); 71552419Sjulian } 71652419Sjulian 71752419Sjulian /* Send it up to the socket */ 71852419Sjulian if (sbappendaddr(&so->so_rcv, 71952419Sjulian (struct sockaddr *) addr, mdata, NULL) == 0) { 72052419Sjulian TRAP_ERROR; 72152419Sjulian m_freem(mdata); 72252419Sjulian return (ENOBUFS); 72352419Sjulian } 72452419Sjulian sorwakeup(so); 72552419Sjulian return (0); 72652419Sjulian} 72752419Sjulian 72852419Sjulian/* 72952419Sjulian * You can only create new nodes from the socket end of things. 73052419Sjulian */ 73152419Sjulianstatic int 73270700Sjulianngs_constructor(node_p nodep) 73352419Sjulian{ 73452419Sjulian return (EINVAL); 73552419Sjulian} 73652419Sjulian 73752419Sjulian/* 73852419Sjulian * We allow any hook to be connected to the node. 73952419Sjulian * There is no per-hook private information though. 74052419Sjulian */ 74152419Sjulianstatic int 74252419Sjulianngs_newhook(node_p node, hook_p hook, const char *name) 74352419Sjulian{ 74470784Sjulian NG_HOOK_SET_PRIVATE(hook, NG_NODE_PRIVATE(node)); 74552419Sjulian return (0); 74652419Sjulian} 74752419Sjulian 74852419Sjulian/* 74952419Sjulian * Incoming messages get passed up to the control socket. 75052885Sjulian * Unless they are for us specifically (socket_type) 75152419Sjulian */ 75252419Sjulianstatic int 75370700Sjulianngs_rcvmsg(node_p node, item_p item, hook_p lasthook) 75452419Sjulian{ 75570784Sjulian struct ngsock *const sockdata = NG_NODE_PRIVATE(node); 75652419Sjulian struct ngpcb *const pcbp = sockdata->ctlsock; 75752419Sjulian struct sockaddr_ng *addr; 75852419Sjulian int addrlen; 75952419Sjulian int error = 0; 76070700Sjulian struct ng_mesg *msg; 76170700Sjulian ng_ID_t retaddr = NGI_RETADDR(item); 76270700Sjulian char retabuf[32]; 76352419Sjulian 76470700Sjulian NGI_GET_MSG(item, msg); 76570700Sjulian NG_FREE_ITEM(item); /* we have all we need */ 76670700Sjulian 76752419Sjulian /* Only allow mesgs to be passed if we have the control socket. 76852419Sjulian * Data sockets can only support the generic messages. */ 76952419Sjulian if (pcbp == NULL) { 77052419Sjulian TRAP_ERROR; 77152419Sjulian return (EINVAL); 77252419Sjulian } 77370784Sjulian#ifdef TRACE_MESSAGES 77470784Sjulianprintf("[%x]:---------->[socket]: c=<%d>cmd=%x(%s) f=%x #%d\n", 77570784Sjulianretaddr, 77670784Sjulianmsg->header.typecookie, 77770784Sjulianmsg->header.cmd, 77870784Sjulianmsg->header.cmdstr, 77970784Sjulianmsg->header.flags, 78070784Sjulianmsg->header.token); 78152419Sjulian 78270784Sjulian#endif 78370784Sjulian 78452885Sjulian if (msg->header.typecookie == NGM_SOCKET_COOKIE) { 78552885Sjulian switch (msg->header.cmd) { 78652885Sjulian case NGM_SOCK_CMD_NOLINGER: 78752885Sjulian sockdata->flags |= NGS_FLAG_NOLINGER; 78852885Sjulian break; 78952885Sjulian case NGM_SOCK_CMD_LINGER: 79052885Sjulian sockdata->flags &= ~NGS_FLAG_NOLINGER; 79152885Sjulian break; 79252885Sjulian default: 79352885Sjulian error = EINVAL; /* unknown command */ 79452885Sjulian } 79552885Sjulian /* Free the message and return */ 79670700Sjulian NG_FREE_MSG(msg); 79752885Sjulian return(error); 79852885Sjulian 79952885Sjulian } 80052419Sjulian /* Get the return address into a sockaddr */ 80170700Sjulian sprintf(retabuf,"[%x]:", retaddr); 80270700Sjulian addrlen = strlen(retabuf); 80352419Sjulian MALLOC(addr, struct sockaddr_ng *, addrlen + 4, M_NETGRAPH, M_NOWAIT); 80452419Sjulian if (addr == NULL) { 80552419Sjulian TRAP_ERROR; 80652419Sjulian return (ENOMEM); 80752419Sjulian } 80852419Sjulian addr->sg_len = addrlen + 3; 80952419Sjulian addr->sg_family = AF_NETGRAPH; 81070700Sjulian bcopy(retabuf, addr->sg_data, addrlen); 81152419Sjulian addr->sg_data[addrlen] = '\0'; 81252419Sjulian 81352419Sjulian /* Send it up */ 81452419Sjulian error = ship_msg(pcbp, msg, addr); 81552419Sjulian FREE(addr, M_NETGRAPH); 81652419Sjulian return (error); 81752419Sjulian} 81852419Sjulian 81952419Sjulian/* 82052419Sjulian * Receive data on a hook 82152419Sjulian */ 82252419Sjulianstatic int 82370700Sjulianngs_rcvdata(hook_p hook, item_p item) 82452419Sjulian{ 82570784Sjulian struct ngsock *const sockdata = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 82652419Sjulian struct ngpcb *const pcbp = sockdata->datasock; 82752419Sjulian struct socket *so; 82852419Sjulian struct sockaddr_ng *addr; 82952419Sjulian char *addrbuf[NG_HOOKLEN + 1 + 4]; 83052419Sjulian int addrlen; 83170700Sjulian struct mbuf *m; 83252419Sjulian 83370700Sjulian NGI_GET_M(item, m); 83470700Sjulian NG_FREE_ITEM(item); 83552419Sjulian /* If there is no data socket, black-hole it */ 83652419Sjulian if (pcbp == NULL) { 83770700Sjulian NG_FREE_M(m); 83852419Sjulian return (0); 83952419Sjulian } 84052419Sjulian so = pcbp->ng_socket; 84152419Sjulian 84252419Sjulian /* Get the return address into a sockaddr. */ 84370784Sjulian addrlen = strlen(NG_HOOK_NAME(hook)); /* <= NG_HOOKLEN */ 84452419Sjulian addr = (struct sockaddr_ng *) addrbuf; 84552419Sjulian addr->sg_len = addrlen + 3; 84652419Sjulian addr->sg_family = AF_NETGRAPH; 84770784Sjulian bcopy(NG_HOOK_NAME(hook), addr->sg_data, addrlen); 84852419Sjulian addr->sg_data[addrlen] = '\0'; 84952419Sjulian 85052419Sjulian /* Try to tell the socket which hook it came in on */ 85152419Sjulian if (sbappendaddr(&so->so_rcv, (struct sockaddr *) addr, m, NULL) == 0) { 85252419Sjulian m_freem(m); 85352419Sjulian TRAP_ERROR; 85452419Sjulian return (ENOBUFS); 85552419Sjulian } 85652419Sjulian sorwakeup(so); 85752419Sjulian return (0); 85852419Sjulian} 85952419Sjulian 86052419Sjulian/* 86153498Sjulian * Hook disconnection 86252885Sjulian * 86352885Sjulian * For this type, removal of the last link destroys the node 86452885Sjulian * if the NOLINGER flag is set. 86552885Sjulian */ 86652885Sjulianstatic int 86752885Sjulianngs_disconnect(hook_p hook) 86852885Sjulian{ 86970784Sjulian struct ngsock *const sockdata = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 87052885Sjulian 87152885Sjulian if ((sockdata->flags & NGS_FLAG_NOLINGER ) 87270784Sjulian && (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0) 87370784Sjulian && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) { 87470784Sjulian ng_rmnode_self(NG_HOOK_NODE(hook)); 87552885Sjulian } 87652885Sjulian return (0); 87752885Sjulian} 87852885Sjulian 87952885Sjulian/* 88052419Sjulian * Do local shutdown processing. 88152419Sjulian * In this case, that involves making sure the socket 88252419Sjulian * knows we should be shutting down. 88352419Sjulian */ 88452419Sjulianstatic int 88570700Sjulianngs_shutdown(node_p node) 88652419Sjulian{ 88770784Sjulian struct ngsock *const sockdata = NG_NODE_PRIVATE(node); 88852419Sjulian struct ngpcb *const dpcbp = sockdata->datasock; 88952419Sjulian struct ngpcb *const pcbp = sockdata->ctlsock; 89052419Sjulian 89152419Sjulian if (dpcbp != NULL) { 89252419Sjulian soisdisconnected(dpcbp->ng_socket); 89352419Sjulian dpcbp->sockdata = NULL; 89452419Sjulian sockdata->datasock = NULL; 89552419Sjulian sockdata->refs--; 89652419Sjulian } 89752419Sjulian if (pcbp != NULL) { 89852419Sjulian soisdisconnected(pcbp->ng_socket); 89952419Sjulian pcbp->sockdata = NULL; 90052419Sjulian sockdata->ctlsock = NULL; 90152419Sjulian sockdata->refs--; 90252419Sjulian } 90370784Sjulian NG_NODE_SET_PRIVATE(node, NULL); 90470784Sjulian NG_NODE_UNREF(node); 90552419Sjulian FREE(sockdata, M_NETGRAPH); 90652419Sjulian return (0); 90752419Sjulian} 90852419Sjulian 90952419Sjulian/* 91052419Sjulian * Control and data socket type descriptors 91152419Sjulian */ 91252419Sjulian 91352419Sjulianstatic struct pr_usrreqs ngc_usrreqs = { 91452419Sjulian NULL, /* abort */ 91552419Sjulian pru_accept_notsupp, 91652419Sjulian ngc_attach, 91752419Sjulian ngc_bind, 91852419Sjulian ngc_connect, 91952419Sjulian pru_connect2_notsupp, 92052419Sjulian pru_control_notsupp, 92152419Sjulian ngc_detach, 92252419Sjulian NULL, /* disconnect */ 92352419Sjulian pru_listen_notsupp, 92452419Sjulian NULL, /* setpeeraddr */ 92552419Sjulian pru_rcvd_notsupp, 92652419Sjulian pru_rcvoob_notsupp, 92752419Sjulian ngc_send, 92852419Sjulian pru_sense_null, 92952419Sjulian NULL, /* shutdown */ 93052419Sjulian ng_setsockaddr, 93152419Sjulian sosend, 93252419Sjulian soreceive, 93352419Sjulian sopoll 93452419Sjulian}; 93552419Sjulian 93652419Sjulianstatic struct pr_usrreqs ngd_usrreqs = { 93752419Sjulian NULL, /* abort */ 93852419Sjulian pru_accept_notsupp, 93952419Sjulian ngd_attach, 94052419Sjulian NULL, /* bind */ 94152419Sjulian ngd_connect, 94252419Sjulian pru_connect2_notsupp, 94352419Sjulian pru_control_notsupp, 94452419Sjulian ngd_detach, 94552419Sjulian NULL, /* disconnect */ 94652419Sjulian pru_listen_notsupp, 94752419Sjulian NULL, /* setpeeraddr */ 94852419Sjulian pru_rcvd_notsupp, 94952419Sjulian pru_rcvoob_notsupp, 95052419Sjulian ngd_send, 95152419Sjulian pru_sense_null, 95252419Sjulian NULL, /* shutdown */ 95352419Sjulian ng_setsockaddr, 95452419Sjulian sosend, 95552419Sjulian soreceive, 95652419Sjulian sopoll 95752419Sjulian}; 95852419Sjulian 95952419Sjulian/* 96052419Sjulian * Definitions of protocols supported in the NETGRAPH domain. 96152419Sjulian */ 96252419Sjulian 96352419Sjulianextern struct domain ngdomain; /* stop compiler warnings */ 96452419Sjulian 96552419Sjulianstatic struct protosw ngsw[] = { 96652419Sjulian { 96770700Sjulian SOCK_DGRAM, /* protocol type */ 96870700Sjulian &ngdomain, /* backpointer to domain */ 96952419Sjulian NG_CONTROL, 97070700Sjulian PR_ATOMIC | PR_ADDR /* | PR_RIGHTS */, /* flags */ 97170700Sjulian 0, 0, 0, 0, /* input, output, ctlinput, ctloutput */ 97270700Sjulian NULL, /* ousrreq */ 97370700Sjulian 0, 0, 0, 0, /* init, fasttimeo, slowtimo, drain */ 97470700Sjulian &ngc_usrreqs, /* usrreq table (above) */ 97570700Sjulian /*{NULL}*/ /* pffh (protocol filter head?) */ 97652419Sjulian }, 97752419Sjulian { 97870700Sjulian SOCK_DGRAM, /* protocol type */ 97970700Sjulian &ngdomain, /* backpointer to domain */ 98052419Sjulian NG_DATA, 98170700Sjulian PR_ATOMIC | PR_ADDR, /* flags */ 98270700Sjulian 0, 0, 0, 0, /* input, output, ctlinput, ctloutput */ 98370700Sjulian NULL, /* ousrreq() */ 98470700Sjulian 0, 0, 0, 0, /* init, fasttimeo, slowtimo, drain */ 98570700Sjulian &ngd_usrreqs, /* usrreq table (above) */ 98670700Sjulian /*{NULL}*/ /* pffh (protocol filter head?) */ 98752419Sjulian } 98852419Sjulian}; 98952419Sjulian 99052419Sjulianstruct domain ngdomain = { 99152419Sjulian AF_NETGRAPH, 99252419Sjulian "netgraph", 99370700Sjulian NULL, /* init() */ 99470700Sjulian NULL, /* externalise() */ 99570700Sjulian NULL, /* dispose() */ 99670700Sjulian ngsw, /* protosw entry */ 99770700Sjulian &ngsw[sizeof(ngsw) / sizeof(ngsw[0])], /* Number of protosw entries */ 99870700Sjulian NULL, /* next domain in list */ 99970700Sjulian NULL, /* rtattach() */ 100070700Sjulian 0, /* arg to rtattach in bits */ 100170700Sjulian 0 /* maxrtkey */ 100252419Sjulian}; 100352419Sjulian 100452419Sjulian/* 100552419Sjulian * Handle loading and unloading for this node type 100652419Sjulian * This is to handle auxiliary linkages (e.g protocol domain addition). 100752419Sjulian */ 100852419Sjulianstatic int 100952419Sjulianngs_mod_event(module_t mod, int event, void *data) 101052419Sjulian{ 101152419Sjulian int error = 0; 101252419Sjulian 101352419Sjulian switch (event) { 101452419Sjulian case MOD_LOAD: 101552419Sjulian /* Register protocol domain */ 101652419Sjulian net_add_domain(&ngdomain); 101752419Sjulian break; 101852419Sjulian case MOD_UNLOAD: 101952419Sjulian /* Insure there are no open netgraph sockets */ 102052419Sjulian if (!LIST_EMPTY(&ngsocklist)) { 102152419Sjulian error = EBUSY; 102252419Sjulian break; 102352419Sjulian } 102452419Sjulian 102552419Sjulian#ifdef NOTYET 102670700Sjulian if ((LIST_EMPTY(&ngsocklist)) && (typestruct.refs == 0)) { 102752419Sjulian /* Unregister protocol domain XXX can't do this yet.. */ 102870700Sjulian if ((error = net_rm_domain(&ngdomain)) != 0) 102970700Sjulian break; 103070700Sjulian } else 103152419Sjulian#endif 103270700Sjulian error = EBUSY; 103352419Sjulian break; 103452419Sjulian default: 103552419Sjulian error = EOPNOTSUPP; 103652419Sjulian break; 103752419Sjulian } 103852419Sjulian return (error); 103952419Sjulian} 104052419Sjulian 104152419SjulianSYSCTL_NODE(_net, AF_NETGRAPH, graph, CTLFLAG_RW, 0, "netgraph Family"); 104252419SjulianSYSCTL_INT(_net_graph, OID_AUTO, family, CTLFLAG_RD, 0, AF_NETGRAPH, ""); 104352419SjulianSYSCTL_NODE(_net_graph, OID_AUTO, data, CTLFLAG_RW, 0, "DATA"); 104452419SjulianSYSCTL_INT(_net_graph_data, OID_AUTO, proto, CTLFLAG_RD, 0, NG_DATA, ""); 104552419SjulianSYSCTL_NODE(_net_graph, OID_AUTO, control, CTLFLAG_RW, 0, "CONTROL"); 104652419SjulianSYSCTL_INT(_net_graph_control, OID_AUTO, proto, CTLFLAG_RD, 0, NG_CONTROL, ""); 104752419Sjulian 1048