1139743Simp/*- 243412Snewton * Copyright (c) 1998 Mark Newton 343412Snewton * Copyright (c) 1996 Christos Zoulas. 443412Snewton * All rights reserved. 543412Snewton * 643412Snewton * Redistribution and use in source and binary forms, with or without 743412Snewton * modification, are permitted provided that the following conditions 843412Snewton * are met: 943412Snewton * 1. Redistributions of source code must retain the above copyright 1043412Snewton * notice, this list of conditions and the following disclaimer. 1143412Snewton * 2. Redistributions in binary form must reproduce the above copyright 1243412Snewton * notice, this list of conditions and the following disclaimer in the 1343412Snewton * documentation and/or other materials provided with the distribution. 1443412Snewton * 3. All advertising materials mentioning features or use of this software 1543412Snewton * must display the following acknowledgement: 1643412Snewton * This product includes software developed by Christos Zoulas. 1743412Snewton * 4. The name of the author may not be used to endorse or promote products 1843412Snewton * derived from this software without specific prior written permission. 1943412Snewton * 2043412Snewton * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 2143412Snewton * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2243412Snewton * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2343412Snewton * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2443412Snewton * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2543412Snewton * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2643412Snewton * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2743412Snewton * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2843412Snewton * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2943412Snewton * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3043412Snewton */ 3143412Snewton 3243412Snewton/* 3343412Snewton * In SVR4 unix domain sockets are referenced sometimes 3443412Snewton * (in putmsg(2) for example) as a [device, inode] pair instead of a pathname. 3543412Snewton * Since there is no iname() routine in the kernel, and we need access to 3643412Snewton * a mapping from inode to pathname, we keep our own table. This is a simple 3743412Snewton * linked list that contains the pathname, the [device, inode] pair, the 3843412Snewton * file corresponding to that socket and the process. When the 3943412Snewton * socket gets closed we remove the item from the list. The list gets loaded 4043412Snewton * every time a stat(2) call finds a socket. 4143412Snewton */ 4243412Snewton 43116174Sobrien#include <sys/cdefs.h> 44116174Sobrien__FBSDID("$FreeBSD$"); 45116174Sobrien 4643412Snewton#include <sys/param.h> 4743412Snewton#include <sys/systm.h> 4843412Snewton#include <sys/queue.h> 49160558Sjhb#include <sys/eventhandler.h> 5043412Snewton#include <sys/file.h> 51160558Sjhb#include <sys/kernel.h> 52147819Sjhb#include <sys/lock.h> 53147819Sjhb#include <sys/mutex.h> 5443412Snewton#include <sys/socket.h> 5543412Snewton#include <sys/socketvar.h> 5643412Snewton#include <sys/sysproto.h> 5743412Snewton#include <sys/un.h> 5843412Snewton#include <sys/stat.h> 5943412Snewton#include <sys/proc.h> 6043412Snewton#include <sys/malloc.h> 6143412Snewton 6265302Sobrien#include <compat/svr4/svr4.h> 6365302Sobrien#include <compat/svr4/svr4_types.h> 6465302Sobrien#include <compat/svr4/svr4_util.h> 6565302Sobrien#include <compat/svr4/svr4_socket.h> 6665302Sobrien#include <compat/svr4/svr4_signal.h> 6765302Sobrien#include <compat/svr4/svr4_sockmod.h> 6865302Sobrien#include <compat/svr4/svr4_proto.h> 6943412Snewton 70160558Sjhbstruct svr4_sockcache_entry { 71160558Sjhb struct proc *p; /* Process for the socket */ 72160558Sjhb void *cookie; /* Internal cookie used for matching */ 73160558Sjhb struct sockaddr_un sock;/* Pathname for the socket */ 74160558Sjhb dev_t dev; /* Device where the socket lives on */ 75160558Sjhb ino_t ino; /* Inode where the socket lives on */ 76160558Sjhb TAILQ_ENTRY(svr4_sockcache_entry) entries; 77160558Sjhb}; 78160558Sjhb 79160558Sjhbstatic TAILQ_HEAD(, svr4_sockcache_entry) svr4_head; 80160558Sjhbstatic struct mtx svr4_sockcache_lock; 81160558Sjhbstatic eventhandler_tag svr4_sockcache_exit_tag, svr4_sockcache_exec_tag; 82160558Sjhb 83160558Sjhbstatic void svr4_purge_sockcache(void *arg, struct proc *p); 84160558Sjhb 85160558Sjhbint 86160558Sjhbsvr4_find_socket(td, fp, dev, ino, saun) 8783366Sjulian struct thread *td; 8843412Snewton struct file *fp; 89130640Sphk dev_t dev; 9043412Snewton ino_t ino; 91160558Sjhb struct sockaddr_un *saun; 9243412Snewton{ 9343412Snewton struct svr4_sockcache_entry *e; 94109153Sdillon void *cookie = ((struct socket *)fp->f_data)->so_emuldata; 9543412Snewton 9683366Sjulian DPRINTF(("svr4_find_socket: [%p,%d,%d]: ", td, dev, ino)); 97160558Sjhb mtx_lock(&svr4_sockcache_lock); 9871449Sjhb TAILQ_FOREACH(e, &svr4_head, entries) 9983366Sjulian if (e->p == td->td_proc && e->dev == dev && e->ino == ino) { 10043412Snewton#ifdef DIAGNOSTIC 10143412Snewton if (e->cookie != NULL && e->cookie != cookie) 10243412Snewton panic("svr4 socket cookie mismatch"); 10343412Snewton#endif 10443412Snewton e->cookie = cookie; 10543412Snewton DPRINTF(("%s\n", e->sock.sun_path)); 106160558Sjhb *saun = e->sock; 107160558Sjhb mtx_unlock(&svr4_sockcache_lock); 108160558Sjhb return (0); 10943412Snewton } 11043412Snewton 111160558Sjhb mtx_unlock(&svr4_sockcache_lock); 11243412Snewton DPRINTF(("not found\n")); 113160558Sjhb return (ENOENT); 11443412Snewton} 11543412Snewton 11643412Snewtonint 11783366Sjuliansvr4_add_socket(td, path, st) 11883366Sjulian struct thread *td; 11943412Snewton const char *path; 12043412Snewton struct stat *st; 12143412Snewton{ 12243412Snewton struct svr4_sockcache_entry *e; 123193015Sdelphij size_t len; 124193015Sdelphij int error; 12543412Snewton 126111119Simp e = malloc(sizeof(*e), M_TEMP, M_WAITOK); 12743412Snewton e->cookie = NULL; 12843412Snewton e->dev = st->st_dev; 12943412Snewton e->ino = st->st_ino; 13083366Sjulian e->p = td->td_proc; 13143412Snewton 13243412Snewton if ((error = copyinstr(path, e->sock.sun_path, 13343412Snewton sizeof(e->sock.sun_path), &len)) != 0) { 13443412Snewton DPRINTF(("svr4_add_socket: copyinstr failed %d\n", error)); 13543412Snewton free(e, M_TEMP); 13643412Snewton return error; 13743412Snewton } 13843412Snewton 13943412Snewton e->sock.sun_family = AF_LOCAL; 14043412Snewton e->sock.sun_len = len; 14143412Snewton 142160558Sjhb mtx_lock(&svr4_sockcache_lock); 14343412Snewton TAILQ_INSERT_HEAD(&svr4_head, e, entries); 144160558Sjhb mtx_unlock(&svr4_sockcache_lock); 14543412Snewton DPRINTF(("svr4_add_socket: %s [%p,%d,%d]\n", e->sock.sun_path, 14683366Sjulian td->td_proc, e->dev, e->ino)); 14743412Snewton return 0; 14843412Snewton} 14943412Snewton 150160558Sjhbvoid 151160558Sjhbsvr4_delete_socket(p, fp) 152160558Sjhb struct proc *p; 153160558Sjhb struct file *fp; 154160558Sjhb{ 155160558Sjhb struct svr4_sockcache_entry *e; 156160558Sjhb void *cookie = ((struct socket *)fp->f_data)->so_emuldata; 15743412Snewton 158160558Sjhb mtx_lock(&svr4_sockcache_lock); 159160558Sjhb TAILQ_FOREACH(e, &svr4_head, entries) 160160558Sjhb if (e->p == p && e->cookie == cookie) { 161160558Sjhb TAILQ_REMOVE(&svr4_head, e, entries); 162160558Sjhb mtx_unlock(&svr4_sockcache_lock); 163160558Sjhb DPRINTF(("svr4_delete_socket: %s [%p,%d,%d]\n", 164160558Sjhb e->sock.sun_path, p, (int)e->dev, e->ino)); 165160558Sjhb free(e, M_TEMP); 166160558Sjhb return; 167160558Sjhb } 168160558Sjhb mtx_unlock(&svr4_sockcache_lock); 169160558Sjhb} 170160558Sjhb 171160558Sjhbvoid 172160558Sjhbsvr4_purge_sockcache(arg, p) 173160558Sjhb void *arg; 174160558Sjhb struct proc *p; 175160558Sjhb{ 176160558Sjhb struct svr4_sockcache_entry *e, *ne; 177160558Sjhb 178160558Sjhb mtx_lock(&svr4_sockcache_lock); 179160558Sjhb TAILQ_FOREACH_SAFE(e, &svr4_head, entries, ne) { 180160558Sjhb if (e->p == p) { 181160558Sjhb TAILQ_REMOVE(&svr4_head, e, entries); 182160558Sjhb DPRINTF(("svr4_purge_sockcache: %s [%p,%d,%d]\n", 183160558Sjhb e->sock.sun_path, p, (int)e->dev, e->ino)); 184160558Sjhb free(e, M_TEMP); 185160558Sjhb } 186160558Sjhb } 187160558Sjhb mtx_unlock(&svr4_sockcache_lock); 188160558Sjhb} 189160558Sjhb 190160558Sjhbvoid 191160558Sjhbsvr4_sockcache_init(void) 192160558Sjhb{ 193160558Sjhb 194160558Sjhb TAILQ_INIT(&svr4_head); 195160558Sjhb mtx_init(&svr4_sockcache_lock, "svr4 socket cache", NULL, MTX_DEF); 196160558Sjhb svr4_sockcache_exit_tag = EVENTHANDLER_REGISTER(process_exit, 197160558Sjhb svr4_purge_sockcache, NULL, EVENTHANDLER_PRI_ANY); 198160558Sjhb svr4_sockcache_exec_tag = EVENTHANDLER_REGISTER(process_exec, 199160558Sjhb svr4_purge_sockcache, NULL, EVENTHANDLER_PRI_ANY); 200160558Sjhb} 201160558Sjhb 202160558Sjhbvoid 203160558Sjhbsvr4_sockcache_destroy(void) 204160558Sjhb{ 205160558Sjhb 206160558Sjhb KASSERT(TAILQ_EMPTY(&svr4_head), 207160558Sjhb ("%s: sockcache entries still around", __func__)); 208160558Sjhb EVENTHANDLER_DEREGISTER(process_exec, svr4_sockcache_exec_tag); 209160558Sjhb EVENTHANDLER_DEREGISTER(process_exit, svr4_sockcache_exit_tag); 210160558Sjhb mtx_destroy(&svr4_sockcache_lock); 211160558Sjhb} 212160558Sjhb 21343412Snewtonint 21483366Sjuliansvr4_sys_socket(td, uap) 21583366Sjulian struct thread *td; 21643412Snewton struct svr4_sys_socket_args *uap; 21743412Snewton{ 218107849Salfred switch (uap->type) { 21943412Snewton case SVR4_SOCK_DGRAM: 220107849Salfred uap->type = SOCK_DGRAM; 22143412Snewton break; 22243412Snewton 22343412Snewton case SVR4_SOCK_STREAM: 224107849Salfred uap->type = SOCK_STREAM; 22543412Snewton break; 22643412Snewton 22743412Snewton case SVR4_SOCK_RAW: 228107849Salfred uap->type = SOCK_RAW; 22943412Snewton break; 23043412Snewton 23143412Snewton case SVR4_SOCK_RDM: 232107849Salfred uap->type = SOCK_RDM; 23343412Snewton break; 23443412Snewton 23543412Snewton case SVR4_SOCK_SEQPACKET: 236107849Salfred uap->type = SOCK_SEQPACKET; 23743412Snewton break; 23843412Snewton default: 23943412Snewton return EINVAL; 24043412Snewton } 241225617Skmacy return sys_socket(td, (struct socket_args *)uap); 24243412Snewton} 243