| 1 | /* |
| 2 | * Copyright (c) 1998 Mark Newton |
| 3 | * Copyright (c) 1996 Christos Zoulas. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. All advertising materials mentioning features or use of this software |
| 15 | * must display the following acknowledgement: |
| 16 | * This product includes software developed by Christos Zoulas. |
| 17 | * 4. The name of the author may not be used to endorse or promote products |
| 18 | * derived from this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 21 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 22 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 23 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 25 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 26 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 27 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 29 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | * |
| 31 | * $FreeBSD: src/sys/svr4/svr4_socket.c,v 1.7 1999/12/08 12:00:48 newton Exp $ |
| 32 | * $DragonFly: src/sys/emulation/svr4/Attic/svr4_socket.c,v 1.4 2003/06/25 03:56:10 dillon Exp $ |
| 33 | */ |
| 34 | |
| 35 | /* |
| 36 | * In SVR4 unix domain sockets are referenced sometimes |
| 37 | * (in putmsg(2) for example) as a [device, inode] pair instead of a pathname. |
| 38 | * Since there is no iname() routine in the kernel, and we need access to |
| 39 | * a mapping from inode to pathname, we keep our own table. This is a simple |
| 40 | * linked list that contains the pathname, the [device, inode] pair, the |
| 41 | * file corresponding to that socket and the process. When the |
| 42 | * socket gets closed we remove the item from the list. The list gets loaded |
| 43 | * every time a stat(2) call finds a socket. |
| 44 | */ |
| 45 | |
| 46 | #include <sys/param.h> |
| 47 | #include <sys/systm.h> |
| 48 | #include <sys/queue.h> |
| 49 | #include <sys/file.h> |
| 50 | #include <sys/socket.h> |
| 51 | #include <sys/socketvar.h> |
| 52 | #include <sys/sysproto.h> |
| 53 | #include <sys/un.h> |
| 54 | #include <sys/stat.h> |
| 55 | #include <sys/proc.h> |
| 56 | #include <sys/malloc.h> |
| 57 | |
| 58 | #include <svr4/svr4.h> |
| 59 | #include <svr4/svr4_types.h> |
| 60 | #include <svr4/svr4_util.h> |
| 61 | #include <svr4/svr4_socket.h> |
| 62 | #include <svr4/svr4_signal.h> |
| 63 | #include <svr4/svr4_sockmod.h> |
| 64 | #include <svr4/svr4_proto.h> |
| 65 | |
| 66 | struct svr4_sockcache_entry { |
| 67 | struct thread *td; /* Process for the socket */ |
| 68 | void *cookie; /* Internal cookie used for matching */ |
| 69 | struct sockaddr_un sock;/* Pathname for the socket */ |
| 70 | udev_t dev; /* Device where the socket lives on */ |
| 71 | ino_t ino; /* Inode where the socket lives on */ |
| 72 | TAILQ_ENTRY(svr4_sockcache_entry) entries; |
| 73 | }; |
| 74 | |
| 75 | extern TAILQ_HEAD(svr4_sockcache_head, svr4_sockcache_entry) svr4_head; |
| 76 | extern int svr4_str_initialized; |
| 77 | |
| 78 | struct sockaddr_un * |
| 79 | svr4_find_socket(td, fp, dev, ino) |
| 80 | struct thread *td; |
| 81 | struct file *fp; |
| 82 | udev_t dev; |
| 83 | ino_t ino; |
| 84 | { |
| 85 | struct svr4_sockcache_entry *e; |
| 86 | void *cookie = ((struct socket *) fp->f_data)->so_emuldata; |
| 87 | |
| 88 | if (!svr4_str_initialized) { |
| 89 | DPRINTF(("svr4_find_socket: uninitialized [%p,%d,%d]\n", |
| 90 | td, dev, ino)); |
| 91 | TAILQ_INIT(&svr4_head); |
| 92 | svr4_str_initialized = 1; |
| 93 | return NULL; |
| 94 | } |
| 95 | |
| 96 | |
| 97 | DPRINTF(("svr4_find_socket: [%p,%d,%d]: ", td, dev, ino)); |
| 98 | for (e = svr4_head.tqh_first; e != NULL; e = e->entries.tqe_next) |
| 99 | if (e->td == td && e->dev == dev && e->ino == ino) { |
| 100 | #ifdef DIAGNOSTIC |
| 101 | if (e->cookie != NULL && e->cookie != cookie) |
| 102 | panic("svr4 socket cookie mismatch"); |
| 103 | #endif |
| 104 | e->cookie = cookie; |
| 105 | DPRINTF(("%s\n", e->sock.sun_path)); |
| 106 | return &e->sock; |
| 107 | } |
| 108 | |
| 109 | DPRINTF(("not found\n")); |
| 110 | return NULL; |
| 111 | } |
| 112 | |
| 113 | |
| 114 | /* |
| 115 | * svr4_delete_socket() is in sys/dev/streams.c (because it's called by |
| 116 | * the streams "soo_close()" routine). |
| 117 | */ |
| 118 | int |
| 119 | svr4_add_socket(td, path, st) |
| 120 | struct thread *td; |
| 121 | const char *path; |
| 122 | struct stat *st; |
| 123 | { |
| 124 | struct svr4_sockcache_entry *e; |
| 125 | int len, error; |
| 126 | |
| 127 | if (!svr4_str_initialized) { |
| 128 | TAILQ_INIT(&svr4_head); |
| 129 | svr4_str_initialized = 1; |
| 130 | } |
| 131 | |
| 132 | e = malloc(sizeof(*e), M_TEMP, M_WAITOK); |
| 133 | e->cookie = NULL; |
| 134 | e->dev = st->st_dev; |
| 135 | e->ino = st->st_ino; |
| 136 | e->td = td; |
| 137 | |
| 138 | if ((error = copyinstr(path, e->sock.sun_path, |
| 139 | sizeof(e->sock.sun_path), &len)) != 0) { |
| 140 | DPRINTF(("svr4_add_socket: copyinstr failed %d\n", error)); |
| 141 | free(e, M_TEMP); |
| 142 | return error; |
| 143 | } |
| 144 | |
| 145 | e->sock.sun_family = AF_LOCAL; |
| 146 | e->sock.sun_len = len; |
| 147 | |
| 148 | TAILQ_INSERT_HEAD(&svr4_head, e, entries); |
| 149 | DPRINTF(("svr4_add_socket: %s [%p,%d,%d]\n", e->sock.sun_path, |
| 150 | td, e->dev, e->ino)); |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | |
| 155 | int |
| 156 | svr4_sys_socket(struct svr4_sys_socket_args *uap) |
| 157 | { |
| 158 | switch (SCARG(uap, type)) { |
| 159 | case SVR4_SOCK_DGRAM: |
| 160 | SCARG(uap, type) = SOCK_DGRAM; |
| 161 | break; |
| 162 | |
| 163 | case SVR4_SOCK_STREAM: |
| 164 | SCARG(uap, type) = SOCK_STREAM; |
| 165 | break; |
| 166 | |
| 167 | case SVR4_SOCK_RAW: |
| 168 | SCARG(uap, type) = SOCK_RAW; |
| 169 | break; |
| 170 | |
| 171 | case SVR4_SOCK_RDM: |
| 172 | SCARG(uap, type) = SOCK_RDM; |
| 173 | break; |
| 174 | |
| 175 | case SVR4_SOCK_SEQPACKET: |
| 176 | SCARG(uap, type) = SOCK_SEQPACKET; |
| 177 | break; |
| 178 | default: |
| 179 | return EINVAL; |
| 180 | } |
| 181 | return socket((struct socket_args *)uap); |
| 182 | } |