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33 * @(#)sys_socket.c 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/kern/sys_socket.c,v 1.28.2.2 2001/02/26 04:23:16 jlemon Exp $
35 * $DragonFly: src/sys/kern/sys_socket.c,v 1.14 2007/04/22 01:13:10 dillon Exp $
38 #include <sys/param.h>
39 #include <sys/systm.h>
42 #include <sys/protosw.h>
43 #include <sys/socket.h>
44 #include <sys/socketvar.h>
45 #include <sys/socketops.h>
46 #include <sys/filio.h> /* XXX */
47 #include <sys/sockio.h>
48 #include <sys/vnode.h>
51 #include <sys/filedesc.h>
52 #include <sys/ucred.h>
54 #include <sys/mplock2.h>
57 #include <net/route.h>
59 struct fileops socketops = {
61 .fo_write = soo_write,
62 .fo_ioctl = soo_ioctl,
64 .fo_kqfilter = sokqfilter,
66 .fo_close = soo_close,
67 .fo_shutdown = soo_shutdown
71 * MPALMOSTSAFE - acquires mplock
74 soo_read(struct file *fp, struct uio *uio, struct ucred *cred, int fflags)
81 so = (struct socket *)fp->f_data;
83 if (fflags & O_FBLOCKING)
85 else if (fflags & O_FNONBLOCKING)
86 msgflags = MSG_FNONBLOCKING;
87 else if (fp->f_flag & FNONBLOCK)
88 msgflags = MSG_FNONBLOCKING;
92 error = so_pru_soreceive(so, NULL, uio, NULL, NULL, &msgflags);
98 * MPALMOSTSAFE - acquires mplock
101 soo_write(struct file *fp, struct uio *uio, struct ucred *cred, int fflags)
108 so = (struct socket *)fp->f_data;
110 if (fflags & O_FBLOCKING)
112 else if (fflags & O_FNONBLOCKING)
113 msgflags = MSG_FNONBLOCKING;
114 else if (fp->f_flag & FNONBLOCK)
115 msgflags = MSG_FNONBLOCKING;
119 error = so_pru_sosend(so, NULL, uio, NULL, NULL, msgflags, uio->uio_td);
125 * MPALMOSTSAFE - acquires mplock
128 soo_ioctl(struct file *fp, u_long cmd, caddr_t data,
129 struct ucred *cred, struct sysmsg *msg)
135 so = (struct socket *)fp->f_data;
140 so->so_state |= SS_ASYNC;
141 so->so_rcv.ssb_flags |= SSB_ASYNC;
142 so->so_snd.ssb_flags |= SSB_ASYNC;
144 so->so_state &= ~SS_ASYNC;
145 so->so_rcv.ssb_flags &= ~SSB_ASYNC;
146 so->so_snd.ssb_flags &= ~SSB_ASYNC;
151 *(int *)data = so->so_rcv.ssb_cc;
155 error = fsetown(*(int *)data, &so->so_sigio);
158 *(int *)data = fgetown(so->so_sigio);
162 error = fsetown(-(*(int *)data), &so->so_sigio);
165 *(int *)data = -fgetown(so->so_sigio);
169 *(int *)data = (so->so_state&SS_RCVATMARK) != 0;
174 * Interface/routing/protocol specific ioctls:
175 * interface and routing ioctls should have a
176 * different entry since a socket's unnecessary
178 if (IOCGROUP(cmd) == 'i')
179 error = ifioctl(so, cmd, data, cred);
180 else if (IOCGROUP(cmd) == 'r')
181 error = rtioctl(cmd, data, cred);
183 error = so_pru_control(so, cmd, data, NULL);
191 * MPALMOSTSAFE - acquires mplock
194 soo_poll(struct file *fp, int events, struct ucred *cred)
200 so = (struct socket *)fp->f_data;
201 error = so_pru_sopoll(so, events, cred);
207 * MPSAFE - acquires mplock
210 soo_stat(struct file *fp, struct stat *ub, struct ucred *cred)
215 bzero((caddr_t)ub, sizeof (*ub));
216 ub->st_mode = S_IFSOCK;
217 so = (struct socket *)fp->f_data;
220 * If SS_CANTRCVMORE is set, but there's still data left in the
221 * receive buffer, the socket is still readable.
223 if ((so->so_state & SS_CANTRCVMORE) == 0 ||
224 so->so_rcv.ssb_cc != 0)
225 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
226 if ((so->so_state & SS_CANTSENDMORE) == 0)
227 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
228 ub->st_size = so->so_rcv.ssb_cc;
229 ub->st_uid = so->so_cred->cr_uid;
230 ub->st_gid = so->so_cred->cr_gid;
231 error = so_pru_sense(so, ub);
236 * MPALMOSTSAFE - acquires mplock
239 soo_close(struct file *fp)
244 fp->f_ops = &badfileops;
246 error = soclose((struct socket *)fp->f_data, fp->f_flag);
255 * MPALMOSTSAFE - acquires mplock
258 soo_shutdown(struct file *fp, int how)
264 error = soshutdown((struct socket *)fp->f_data, how);