1 /* $OpenBSD: sys_socket.c,v 1.63 2024/03/31 13:50:00 mvs Exp $ */ 2 /* $NetBSD: sys_socket.c,v 1.13 1995/08/12 23:59:09 mycroft Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)sys_socket.c 8.1 (Berkeley) 6/10/93 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/file.h> 38 #include <sys/proc.h> 39 #include <sys/mbuf.h> 40 #include <sys/protosw.h> 41 #include <sys/socket.h> 42 #include <sys/socketvar.h> 43 #include <sys/ioctl.h> 44 #include <sys/stat.h> 45 #include <sys/fcntl.h> 46 47 #include <net/if.h> 48 49 const struct fileops socketops = { 50 .fo_read = soo_read, 51 .fo_write = soo_write, 52 .fo_ioctl = soo_ioctl, 53 .fo_kqfilter = soo_kqfilter, 54 .fo_stat = soo_stat, 55 .fo_close = soo_close 56 }; 57 58 int 59 soo_read(struct file *fp, struct uio *uio, int fflags) 60 { 61 struct socket *so = (struct socket *)fp->f_data; 62 int flags = 0; 63 64 if (fp->f_flag & FNONBLOCK) 65 flags |= MSG_DONTWAIT; 66 67 return (soreceive(so, NULL, uio, NULL, NULL, &flags, 0)); 68 } 69 70 int 71 soo_write(struct file *fp, struct uio *uio, int fflags) 72 { 73 struct socket *so = (struct socket *)fp->f_data; 74 int flags = 0; 75 76 if (fp->f_flag & FNONBLOCK) 77 flags |= MSG_DONTWAIT; 78 79 return (sosend(so, NULL, uio, NULL, NULL, flags)); 80 } 81 82 int 83 soo_ioctl(struct file *fp, u_long cmd, caddr_t data, struct proc *p) 84 { 85 struct socket *so = (struct socket *)fp->f_data; 86 87 switch (cmd) { 88 89 case FIONBIO: 90 break; 91 92 case FIOASYNC: 93 solock(so); 94 mtx_enter(&so->so_rcv.sb_mtx); 95 if (*(int *)data) { 96 so->so_rcv.sb_flags |= SB_ASYNC; 97 so->so_snd.sb_flags |= SB_ASYNC; 98 } else { 99 so->so_rcv.sb_flags &= ~SB_ASYNC; 100 so->so_snd.sb_flags &= ~SB_ASYNC; 101 } 102 mtx_leave(&so->so_rcv.sb_mtx); 103 sounlock(so); 104 break; 105 106 case FIONREAD: 107 *(int *)data = so->so_rcv.sb_datacc; 108 break; 109 110 case FIOSETOWN: 111 case SIOCSPGRP: 112 case TIOCSPGRP: 113 return sigio_setown(&so->so_sigio, cmd, data); 114 115 case FIOGETOWN: 116 case SIOCGPGRP: 117 case TIOCGPGRP: 118 sigio_getown(&so->so_sigio, cmd, data); 119 break; 120 121 case SIOCATMARK: 122 *(int *)data = (so->so_rcv.sb_state & SS_RCVATMARK) != 0; 123 break; 124 125 default: 126 /* 127 * Interface/routing/protocol specific ioctls: 128 * interface and routing ioctls should have a 129 * different entry since a socket's unnecessary 130 */ 131 if (IOCGROUP(cmd) == 'i') 132 return ifioctl(so, cmd, data, p); 133 if (IOCGROUP(cmd) == 'r') 134 return (EOPNOTSUPP); 135 return pru_control(so, cmd, data, NULL); 136 } 137 138 return (0); 139 } 140 141 int 142 soo_stat(struct file *fp, struct stat *ub, struct proc *p) 143 { 144 struct socket *so = fp->f_data; 145 146 memset(ub, 0, sizeof (*ub)); 147 ub->st_mode = S_IFSOCK; 148 solock(so); 149 mtx_enter(&so->so_rcv.sb_mtx); 150 if ((so->so_rcv.sb_state & SS_CANTRCVMORE) == 0 || 151 so->so_rcv.sb_cc != 0) 152 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; 153 mtx_leave(&so->so_rcv.sb_mtx); 154 if ((so->so_snd.sb_state & SS_CANTSENDMORE) == 0) 155 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; 156 ub->st_uid = so->so_euid; 157 ub->st_gid = so->so_egid; 158 (void)pru_sense(so, ub); 159 sounlock(so); 160 return (0); 161 } 162 163 int 164 soo_close(struct file *fp, struct proc *p) 165 { 166 int flags, error = 0; 167 168 if (fp->f_data) { 169 flags = (fp->f_flag & FNONBLOCK) ? MSG_DONTWAIT : 0; 170 error = soclose(fp->f_data, flags); 171 } 172 fp->f_data = NULL; 173 return (error); 174 } 175