| 1 | /* |
| 2 | * Copyright (c) 1982, 1986, 1990 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#)sys_socket.c 7.11 (Berkeley) 4/16/91 |
| 34 | */ |
| 35 | |
| 36 | #include "param.h" |
| 37 | #include "systm.h" |
| 38 | #include "file.h" |
| 39 | #include "mbuf.h" |
| 40 | #include "protosw.h" |
| 41 | #include "socket.h" |
| 42 | #include "socketvar.h" |
| 43 | #include "ioctl.h" |
| 44 | #include "stat.h" |
| 45 | |
| 46 | #include "net/if.h" |
| 47 | #include "net/route.h" |
| 48 | |
| 49 | struct fileops socketops = |
| 50 | { soo_read, soo_write, soo_ioctl, soo_select, soo_close }; |
| 51 | |
| 52 | /* ARGSUSED */ |
| 53 | soo_read(fp, uio, cred) |
| 54 | struct file *fp; |
| 55 | struct uio *uio; |
| 56 | struct ucred *cred; |
| 57 | { |
| 58 | |
| 59 | return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0, |
| 60 | uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); |
| 61 | } |
| 62 | |
| 63 | /* ARGSUSED */ |
| 64 | soo_write(fp, uio, cred) |
| 65 | struct file *fp; |
| 66 | struct uio *uio; |
| 67 | struct ucred *cred; |
| 68 | { |
| 69 | |
| 70 | return (sosend((struct socket *)fp->f_data, (struct mbuf *)0, |
| 71 | uio, (struct mbuf *)0, (struct mbuf *)0, 0)); |
| 72 | } |
| 73 | |
| 74 | soo_ioctl(fp, cmd, data, p) |
| 75 | struct file *fp; |
| 76 | int cmd; |
| 77 | register caddr_t data; |
| 78 | struct proc *p; |
| 79 | { |
| 80 | register struct socket *so = (struct socket *)fp->f_data; |
| 81 | |
| 82 | switch (cmd) { |
| 83 | |
| 84 | case FIONBIO: |
| 85 | if (*(int *)data) |
| 86 | so->so_state |= SS_NBIO; |
| 87 | else |
| 88 | so->so_state &= ~SS_NBIO; |
| 89 | return (0); |
| 90 | |
| 91 | case FIOASYNC: |
| 92 | if (*(int *)data) { |
| 93 | so->so_state |= SS_ASYNC; |
| 94 | so->so_rcv.sb_flags |= SB_ASYNC; |
| 95 | so->so_snd.sb_flags |= SB_ASYNC; |
| 96 | } else { |
| 97 | so->so_state &= ~SS_ASYNC; |
| 98 | so->so_rcv.sb_flags &= ~SB_ASYNC; |
| 99 | so->so_snd.sb_flags &= ~SB_ASYNC; |
| 100 | } |
| 101 | return (0); |
| 102 | |
| 103 | case FIONREAD: |
| 104 | *(int *)data = so->so_rcv.sb_cc; |
| 105 | return (0); |
| 106 | |
| 107 | case SIOCSPGRP: |
| 108 | so->so_pgid = *(int *)data; |
| 109 | return (0); |
| 110 | |
| 111 | case SIOCGPGRP: |
| 112 | *(int *)data = so->so_pgid; |
| 113 | return (0); |
| 114 | |
| 115 | case SIOCATMARK: |
| 116 | *(int *)data = (so->so_state&SS_RCVATMARK) != 0; |
| 117 | return (0); |
| 118 | } |
| 119 | /* |
| 120 | * Interface/routing/protocol specific ioctls: |
| 121 | * interface and routing ioctls should have a |
| 122 | * different entry since a socket's unnecessary |
| 123 | */ |
| 124 | if (IOCGROUP(cmd) == 'i') |
| 125 | return (ifioctl(so, cmd, data, p)); |
| 126 | if (IOCGROUP(cmd) == 'r') |
| 127 | return (rtioctl(cmd, data, p)); |
| 128 | return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, |
| 129 | (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0)); |
| 130 | } |
| 131 | |
| 132 | soo_select(fp, which, p) |
| 133 | struct file *fp; |
| 134 | int which; |
| 135 | struct proc *p; |
| 136 | { |
| 137 | register struct socket *so = (struct socket *)fp->f_data; |
| 138 | register int s = splnet(); |
| 139 | |
| 140 | switch (which) { |
| 141 | |
| 142 | case FREAD: |
| 143 | if (soreadable(so)) { |
| 144 | splx(s); |
| 145 | return (1); |
| 146 | } |
| 147 | sbselqueue(&so->so_rcv, p); |
| 148 | break; |
| 149 | |
| 150 | case FWRITE: |
| 151 | if (sowriteable(so)) { |
| 152 | splx(s); |
| 153 | return (1); |
| 154 | } |
| 155 | sbselqueue(&so->so_snd, p); |
| 156 | break; |
| 157 | |
| 158 | case 0: |
| 159 | if (so->so_oobmark || |
| 160 | (so->so_state & SS_RCVATMARK)) { |
| 161 | splx(s); |
| 162 | return (1); |
| 163 | } |
| 164 | sbselqueue(&so->so_rcv, p); |
| 165 | break; |
| 166 | } |
| 167 | splx(s); |
| 168 | return (0); |
| 169 | } |
| 170 | |
| 171 | soo_stat(so, ub) |
| 172 | register struct socket *so; |
| 173 | register struct stat *ub; |
| 174 | { |
| 175 | |
| 176 | bzero((caddr_t)ub, sizeof (*ub)); |
| 177 | return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, |
| 178 | (struct mbuf *)ub, (struct mbuf *)0, |
| 179 | (struct mbuf *)0)); |
| 180 | } |
| 181 | |
| 182 | /* ARGSUSED */ |
| 183 | soo_close(fp, p) |
| 184 | struct file *fp; |
| 185 | struct proc *p; |
| 186 | { |
| 187 | int error = 0; |
| 188 | |
| 189 | if (fp->f_data) |
| 190 | error = soclose((struct socket *)fp->f_data); |
| 191 | fp->f_data = 0; |
| 192 | return (error); |
| 193 | } |