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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>
55 #include <net/route.h>
57 struct fileops socketops = {
59 .fo_write = soo_write,
60 .fo_ioctl = soo_ioctl,
62 .fo_kqfilter = sokqfilter,
64 .fo_close = soo_close,
65 .fo_shutdown = soo_shutdown
69 * MPALMOSTSAFE - acquires mplock
72 soo_read(struct file *fp, struct uio *uio, struct ucred *cred, int fflags)
79 so = (struct socket *)fp->f_data;
81 if (fflags & O_FBLOCKING)
83 else if (fflags & O_FNONBLOCKING)
84 msgflags = MSG_FNONBLOCKING;
85 else if (fp->f_flag & FNONBLOCK)
86 msgflags = MSG_FNONBLOCKING;
90 error = so_pru_soreceive(so, NULL, uio, NULL, NULL, &msgflags);
96 * MPALMOSTSAFE - acquires mplock
99 soo_write(struct file *fp, struct uio *uio, struct ucred *cred, int fflags)
106 so = (struct socket *)fp->f_data;
108 if (fflags & O_FBLOCKING)
110 else if (fflags & O_FNONBLOCKING)
111 msgflags = MSG_FNONBLOCKING;
112 else if (fp->f_flag & FNONBLOCK)
113 msgflags = MSG_FNONBLOCKING;
117 error = so_pru_sosend(so, NULL, uio, NULL, NULL, msgflags, uio->uio_td);
123 * MPALMOSTSAFE - acquires mplock
126 soo_ioctl(struct file *fp, u_long cmd, caddr_t data, struct ucred *cred)
132 so = (struct socket *)fp->f_data;
137 so->so_state |= SS_ASYNC;
138 so->so_rcv.ssb_flags |= SSB_ASYNC;
139 so->so_snd.ssb_flags |= SSB_ASYNC;
141 so->so_state &= ~SS_ASYNC;
142 so->so_rcv.ssb_flags &= ~SSB_ASYNC;
143 so->so_snd.ssb_flags &= ~SSB_ASYNC;
148 *(int *)data = so->so_rcv.ssb_cc;
152 error = fsetown(*(int *)data, &so->so_sigio);
155 *(int *)data = fgetown(so->so_sigio);
159 error = fsetown(-(*(int *)data), &so->so_sigio);
162 *(int *)data = -fgetown(so->so_sigio);
166 *(int *)data = (so->so_state&SS_RCVATMARK) != 0;
171 * Interface/routing/protocol specific ioctls:
172 * interface and routing ioctls should have a
173 * different entry since a socket's unnecessary
175 if (IOCGROUP(cmd) == 'i')
176 error = ifioctl(so, cmd, data, cred);
177 else if (IOCGROUP(cmd) == 'r')
178 error = rtioctl(cmd, data, cred);
180 error = so_pru_control(so, cmd, data, NULL);
188 * MPALMOSTSAFE - acquires mplock
191 soo_poll(struct file *fp, int events, struct ucred *cred)
197 so = (struct socket *)fp->f_data;
198 error = so_pru_sopoll(so, events, cred);
204 * MPSAFE - acquires mplock
207 soo_stat(struct file *fp, struct stat *ub, struct ucred *cred)
212 bzero((caddr_t)ub, sizeof (*ub));
213 ub->st_mode = S_IFSOCK;
214 so = (struct socket *)fp->f_data;
217 * If SS_CANTRCVMORE is set, but there's still data left in the
218 * receive buffer, the socket is still readable.
220 if ((so->so_state & SS_CANTRCVMORE) == 0 ||
221 so->so_rcv.ssb_cc != 0)
222 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
223 if ((so->so_state & SS_CANTSENDMORE) == 0)
224 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
225 ub->st_size = so->so_rcv.ssb_cc;
226 ub->st_uid = so->so_cred->cr_uid;
227 ub->st_gid = so->so_cred->cr_gid;
228 error = so_pru_sense(so, ub);
233 * MPALMOSTSAFE - acquires mplock
236 soo_close(struct file *fp)
241 fp->f_ops = &badfileops;
243 error = soclose((struct socket *)fp->f_data, fp->f_flag);
252 * MPALMOSTSAFE - acquires mplock
255 soo_shutdown(struct file *fp, int how)
261 error = soshutdown((struct socket *)fp->f_data, how);