Annotation of sys/kern/sys_socket.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: sys_socket.c,v 1.11 2007/02/26 23:53:33 kurt 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/poll.h>
45: #include <sys/stat.h>
46:
47: #include <net/if.h>
48: #include <net/route.h>
49:
50: struct fileops socketops = {
51: soo_read, soo_write, soo_ioctl, soo_poll, soo_kqfilter,
52: soo_stat, soo_close
53: };
54:
55: /* ARGSUSED */
56: int
57: soo_read(struct file *fp, off_t *poff, struct uio *uio, struct ucred *cred)
58: {
59:
60: return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
61: uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
62: }
63:
64: /* ARGSUSED */
65: int
66: soo_write(struct file *fp, off_t *poff, struct uio *uio, struct ucred *cred)
67: {
68:
69: return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
70: uio, (struct mbuf *)0, (struct mbuf *)0, 0));
71: }
72:
73: int
74: soo_ioctl(struct file *fp, u_long cmd, caddr_t data, struct proc *p)
75: {
76: struct socket *so = (struct socket *)fp->f_data;
77:
78: switch (cmd) {
79:
80: case FIONBIO:
81: if (*(int *)data)
82: so->so_state |= SS_NBIO;
83: else
84: so->so_state &= ~SS_NBIO;
85: return (0);
86:
87: case FIOASYNC:
88: if (*(int *)data) {
89: so->so_state |= SS_ASYNC;
90: so->so_rcv.sb_flags |= SB_ASYNC;
91: so->so_snd.sb_flags |= SB_ASYNC;
92: } else {
93: so->so_state &= ~SS_ASYNC;
94: so->so_rcv.sb_flags &= ~SB_ASYNC;
95: so->so_snd.sb_flags &= ~SB_ASYNC;
96: }
97: return (0);
98:
99: case FIONREAD:
100: *(int *)data = so->so_rcv.sb_datacc;
101: return (0);
102:
103: case SIOCSPGRP:
104: so->so_pgid = *(int *)data;
105: so->so_siguid = p->p_cred->p_ruid;
106: so->so_sigeuid = p->p_ucred->cr_uid;
107: return (0);
108:
109: case SIOCGPGRP:
110: *(int *)data = so->so_pgid;
111: return (0);
112:
113: case SIOCATMARK:
114: *(int *)data = (so->so_state&SS_RCVATMARK) != 0;
115: return (0);
116: }
117: /*
118: * Interface/routing/protocol specific ioctls:
119: * interface and routing ioctls should have a
120: * different entry since a socket's unnecessary
121: */
122: if (IOCGROUP(cmd) == 'i')
123: return (ifioctl(so, cmd, data, p));
124: if (IOCGROUP(cmd) == 'r')
125: return (rtioctl(cmd, data, p));
126: return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
127: (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
128: }
129:
130: int
131: soo_poll(struct file *fp, int events, struct proc *p)
132: {
133: struct socket *so = (struct socket *)fp->f_data;
134: int revents = 0;
135: int s = splsoftnet();
136:
137: if (events & (POLLIN | POLLRDNORM)) {
138: if (soreadable(so))
139: revents |= events & (POLLIN | POLLRDNORM);
140: }
141: if (events & (POLLOUT | POLLWRNORM)) {
142: if (sowriteable(so))
143: revents |= events & (POLLOUT | POLLWRNORM);
144: }
145: if (events & (POLLPRI | POLLRDBAND)) {
146: if (so->so_oobmark || (so->so_state & SS_RCVATMARK))
147: revents |= events & (POLLPRI | POLLRDBAND);
148: }
149: if (revents == 0) {
150: if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) {
151: selrecord(p, &so->so_rcv.sb_sel);
152: so->so_rcv.sb_flags |= SB_SEL;
153: }
154: if (events & (POLLOUT | POLLWRNORM)) {
155: selrecord(p, &so->so_snd.sb_sel);
156: so->so_snd.sb_flags |= SB_SEL;
157: }
158: }
159: splx(s);
160: return (revents);
161: }
162:
163: int
164: soo_stat(struct file *fp, struct stat *ub, struct proc *p)
165: {
166: struct socket *so = (struct socket *)fp->f_data;
167:
168: bzero((caddr_t)ub, sizeof (*ub));
169: ub->st_mode = S_IFSOCK;
170: return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE,
171: (struct mbuf *)ub, (struct mbuf *)0,
172: (struct mbuf *)0));
173: }
174:
175: /* ARGSUSED */
176: int
177: soo_close(struct file *fp, struct proc *p)
178: {
179: int error = 0;
180:
181: if (fp->f_data)
182: error = soclose((struct socket *)fp->f_data);
183: fp->f_data = 0;
184: return (error);
185: }
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