/* $OpenBSD: svr4_socket.c,v 1.3 1997/08/29 19:56:37 kstailey Exp $ */ /* $NetBSD: svr4_socket.c,v 1.4 1997/07/21 23:02:37 christos Exp $ */ /* * Copyright (c) 1996 Christos Zoulas. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christos Zoulas. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * In SVR4 unix domain sockets are referenced sometimes * (in putmsg(2) for example) as a [device, inode] pair instead of a pathname. * Since there is no iname() routine in the kernel, and we need access to * a mapping from inode to pathname, we keep our own table. This is a simple * linked list that contains the pathname, the [device, inode] pair, the * file corresponding to that socket and the process. When the * socket gets closed we remove the item from the list. The list gets loaded * every time a stat(2) call finds a socket. */ #include <sys/param.h> #include <sys/kernel.h> #include <sys/systm.h> #include <sys/queue.h> #include <sys/mbuf.h> #include <sys/file.h> #include <sys/mount.h> #include <sys/socket.h> #include <sys/socketvar.h> #include <sys/syscallargs.h> #include <sys/un.h> #include <sys/stat.h> #include <compat/svr4/svr4_types.h> #include <compat/svr4/svr4_util.h> #include <compat/svr4/svr4_socket.h> #include <compat/svr4/svr4_signal.h> #include <compat/svr4/svr4_sockmod.h> #include <compat/svr4/svr4_syscallargs.h> struct svr4_sockcache_entry { struct proc *p; /* Process for the socket */ void *cookie; /* Internal cookie used for matching */ struct sockaddr_un sock;/* Pathname for the socket */ dev_t dev; /* Device where the socket lives on */ ino_t ino; /* Inode where the socket lives on */ TAILQ_ENTRY(svr4_sockcache_entry) entries; }; static TAILQ_HEAD(svr4_sockcache_head, svr4_sockcache_entry) svr4_head; static int initialized = 0; struct sockaddr_un * svr4_find_socket(p, fp, dev, ino) struct proc *p; struct file *fp; dev_t dev; ino_t ino; { struct svr4_sockcache_entry *e; void *cookie = ((struct socket *) fp->f_data)->so_internal; if (!initialized) { DPRINTF(("svr4_find_socket: uninitialized [%p,%d,%d]\n", p, dev, ino)); TAILQ_INIT(&svr4_head); initialized = 1; return NULL; } DPRINTF(("svr4_find_socket: [%p,%d,%d]: ", p, dev, ino)); for (e = svr4_head.tqh_first; e != NULL; e = e->entries.tqe_next) if (e->p == p && e->dev == dev && e->ino == ino) { #ifdef DIAGNOSTIC if (e->cookie != NULL && e->cookie != cookie) panic("svr4 socket cookie mismatch"); #endif e->cookie = cookie; DPRINTF(("%s\n", e->sock.sun_path)); return &e->sock; } DPRINTF(("not found\n")); return NULL; } void svr4_delete_socket(p, fp) struct proc *p; struct file *fp; { struct svr4_sockcache_entry *e; void *cookie = ((struct socket *) fp->f_data)->so_internal; if (!initialized) { TAILQ_INIT(&svr4_head); initialized = 1; return; } for (e = svr4_head.tqh_first; e != NULL; e = e->entries.tqe_next) if (e->p == p && e->cookie == cookie) { TAILQ_REMOVE(&svr4_head, e, entries); DPRINTF(("svr4_delete_socket: %s [%p,%d,%d]\n", e->sock.sun_path, p, e->dev, e->ino)); free(e, M_TEMP); return; } } int svr4_add_socket(p, path, st) struct proc *p; const char *path; struct stat *st; { struct svr4_sockcache_entry *e; int len, error; if (!initialized) { TAILQ_INIT(&svr4_head); initialized = 1; } e = malloc(sizeof(*e), M_TEMP, M_WAITOK); e->cookie = NULL; e->dev = st->st_dev; e->ino = st->st_ino; e->p = p; if ((error = copyinstr(path, e->sock.sun_path, sizeof(e->sock.sun_path), &len)) != 0) { DPRINTF(("svr4_add_socket: copyinstr failed %d\n", error)); free(e, M_TEMP); return error; } e->sock.sun_family = AF_UNIX; e->sock.sun_len = len; TAILQ_INSERT_HEAD(&svr4_head, e, entries); DPRINTF(("svr4_add_socket: %s [%p,%d,%d]\n", e->sock.sun_path, p, e->dev, e->ino)); return 0; } int svr4_sys_socket(p, v, retval) struct proc *p; void *v; register_t *retval; { struct svr4_sys_socket_args *uap = v; switch (SCARG(uap, type)) { case SVR4_SOCK_DGRAM: SCARG(uap, type) = SOCK_DGRAM; break; case SVR4_SOCK_STREAM: SCARG(uap, type) = SOCK_STREAM; break; case SVR4_SOCK_RAW: SCARG(uap, type) = SOCK_RAW; break; case SVR4_SOCK_RDM: SCARG(uap, type) = SOCK_RDM; break; case SVR4_SOCK_SEQPACKET: SCARG(uap, type) = SOCK_SEQPACKET; break; default: return EINVAL; } return sys_socket(p, uap, retval); }