#include <sys/param.h>
#include <sys/systm.h>
#include <sys/file_internal.h>
#include <sys/event.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/filio.h>
#include <sys/sockio.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <sys/filedesc.h>
#include <sys/kauth.h>
#include <sys/signalvar.h>
#include <sys/vnode.h>
#include <net/if.h>
#include <net/route.h>
#if CONFIG_MACF
#include <security/mac_framework.h>
#endif
static int soo_read(struct fileproc *, struct uio *, int, vfs_context_t ctx);
static int soo_write(struct fileproc *, struct uio *, int, vfs_context_t ctx);
static int soo_close(struct fileglob *, vfs_context_t ctx);
static int soo_drain(struct fileproc *, vfs_context_t ctx);
extern int soo_ioctl(struct fileproc *, u_long, caddr_t, vfs_context_t ctx);
extern int soo_stat(struct socket *, void *, int);
extern int soo_select(struct fileproc *, int, void *, vfs_context_t ctx);
extern int soo_kqfilter(struct fileproc *, struct knote *, vfs_context_t ctx);
struct fileops socketops = {
soo_read, soo_write, soo_ioctl, soo_select, soo_close,
soo_kqfilter, soo_drain
};
static int
soo_read(struct fileproc *fp, struct uio *uio, __unused int flags,
#if !CONFIG_MACF_SOCKET
__unused
#endif
vfs_context_t ctx)
{
struct socket *so;
int stat;
#if CONFIG_MACF_SOCKET
int error;
#endif
int (*fsoreceive)(struct socket *so2, struct sockaddr **paddr,
struct uio *uio2, struct mbuf **mp0, struct mbuf **controlp,
int *flagsp);
if ((so = (struct socket *)fp->f_fglob->fg_data) == NULL) {
return (EBADF);
}
#if CONFIG_MACF_SOCKET
error = mac_socket_check_receive(vfs_context_ucred(ctx), so);
if (error)
return (error);
#endif
fsoreceive = so->so_proto->pr_usrreqs->pru_soreceive;
stat = (*fsoreceive)(so, 0, uio, 0, 0, 0);
return (stat);
}
static int
soo_write(struct fileproc *fp, struct uio *uio, __unused int flags,
vfs_context_t ctx)
{
struct socket *so;
int stat;
int (*fsosend)(struct socket *so2, struct sockaddr *addr,
struct uio *uio2, struct mbuf *top, struct mbuf *control,
int flags2);
proc_t procp;
#if CONFIG_MACF_SOCKET
int error;
#endif
if ((so = (struct socket *)fp->f_fglob->fg_data) == NULL) {
return (EBADF);
}
#if CONFIG_MACF_SOCKET
error = mac_socket_check_send(vfs_context_ucred(ctx), so, NULL);
if (error)
return (error);
#endif
fsosend = so->so_proto->pr_usrreqs->pru_sosend;
stat = (*fsosend)(so, 0, uio, 0, 0, 0);
procp = vfs_context_proc(ctx);
if (stat == EPIPE && !(so->so_flags & SOF_NOSIGPIPE))
psignal(procp, SIGPIPE);
return (stat);
}
__private_extern__ int
soioctl(struct socket *so, u_long cmd, caddr_t data, struct proc *p)
{
int error = 0;
int dropsockref = -1;
socket_lock(so, 1);
if (IOCGROUP(cmd) != 'i' && IOCGROUP(cmd) != 'r') {
int filtered = 0;
struct socket_filter_entry *filter;
for (filter = so->so_filt; filter && error == 0;
filter = filter->sfe_next_onsocket) {
if (filter->sfe_filter->sf_filter.sf_ioctl) {
if (filtered == 0) {
sflt_use(so);
socket_unlock(so, 0);
filtered = 1;
}
error = filter->sfe_filter->sf_filter.
sf_ioctl(filter->sfe_cookie, so, cmd, data);
}
}
if (filtered) {
socket_lock(so, 0);
sflt_unuse(so);
}
if (error != 0)
goto out;
}
switch (cmd) {
case FIONBIO:
if (*(int *)data)
so->so_state |= SS_NBIO;
else
so->so_state &= ~SS_NBIO;
goto out;
case FIOASYNC:
if (*(int *)data) {
so->so_state |= SS_ASYNC;
so->so_rcv.sb_flags |= SB_ASYNC;
so->so_snd.sb_flags |= SB_ASYNC;
} else {
so->so_state &= ~SS_ASYNC;
so->so_rcv.sb_flags &= ~SB_ASYNC;
so->so_snd.sb_flags &= ~SB_ASYNC;
}
goto out;
case FIONREAD:
*(int *)data = so->so_rcv.sb_cc;
goto out;
case SIOCSPGRP:
so->so_pgid = *(int *)data;
goto out;
case SIOCGPGRP:
*(int *)data = so->so_pgid;
goto out;
case SIOCATMARK:
*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
goto out;
case SIOCSETOT: {
struct socket *cloned_so = NULL;
int cloned_fd = *(int *)data;
if (cloned_fd != -1) {
error = file_socket(cloned_fd, &cloned_so);
if (error) {
goto out;
}
dropsockref = cloned_fd;
}
so->so_state |= SS_NBIO;
so->so_options |= SO_DONTTRUNC | SO_WANTMORE;
so->so_flags |= SOF_NOSIGPIPE | SOF_NPX_SETOPTSHUT;
if (cloned_so && so != cloned_so) {
so->so_options |=
cloned_so->so_options & ~SO_ACCEPTCONN;
if (so->so_options & SO_LINGER)
so->so_linger = cloned_so->so_linger;
if (cloned_so->so_snd.sb_hiwat > 0) {
if (sbreserve(&so->so_snd,
cloned_so->so_snd.sb_hiwat) == 0) {
error = ENOBUFS;
goto out;
}
}
if (cloned_so->so_rcv.sb_hiwat > 0) {
if (sbreserve(&so->so_rcv,
cloned_so->so_rcv.sb_hiwat) == 0) {
error = ENOBUFS;
goto out;
}
}
so->so_snd.sb_lowat =
(cloned_so->so_snd.sb_lowat > so->so_snd.sb_hiwat) ?
so->so_snd.sb_hiwat : cloned_so->so_snd.sb_lowat;
so->so_rcv.sb_lowat =
(cloned_so->so_rcv.sb_lowat > so->so_rcv.sb_hiwat) ?
so->so_rcv.sb_hiwat : cloned_so->so_rcv.sb_lowat;
so->so_snd.sb_timeo = cloned_so->so_snd.sb_timeo;
so->so_rcv.sb_timeo = cloned_so->so_rcv.sb_timeo;
}
error = (*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
data, 0, p);
if (error == EOPNOTSUPP)
error = 0;
goto out;
}
}
if (IOCGROUP(cmd) == 'i') {
error = ifioctllocked(so, cmd, data, p);
} else {
if (IOCGROUP(cmd) == 'r')
error = rtioctl(cmd, data, p);
else
error = (*so->so_proto->pr_usrreqs->pru_control)(so,
cmd, data, 0, p);
}
out:
if (dropsockref != -1)
file_drop(dropsockref);
socket_unlock(so, 1);
if (error == EJUSTRETURN)
error = 0;
return (error);
}
int
soo_ioctl(struct fileproc *fp, u_long cmd, caddr_t data, vfs_context_t ctx)
{
struct socket *so;
int error;
proc_t procp = vfs_context_proc(ctx);
if ((so = (struct socket *)fp->f_fglob->fg_data) == NULL) {
return (EBADF);
}
error = soioctl(so, cmd, data, procp);
if (error == 0 && cmd == SIOCSETOT)
fp->f_fglob->fg_flag |= FNONBLOCK;
return (error);
}
int
soo_select(struct fileproc *fp, int which, void *wql, vfs_context_t ctx)
{
struct socket *so = (struct socket *)fp->f_fglob->fg_data;
int retnum = 0;
proc_t procp;
if (so == NULL || so == (struct socket *)-1)
return (0);
procp = vfs_context_proc(ctx);
#if CONFIG_MACF_SOCKET
if (mac_socket_check_select(vfs_context_ucred(ctx), so, which) != 0);
return (0);
#endif
socket_lock(so, 1);
switch (which) {
case FREAD:
so->so_rcv.sb_flags |= SB_SEL;
if (soreadable(so)) {
retnum = 1;
so->so_rcv.sb_flags &= ~SB_SEL;
goto done;
}
selrecord(procp, &so->so_rcv.sb_sel, wql);
break;
case FWRITE:
so->so_snd.sb_flags |= SB_SEL;
if (sowriteable(so)) {
retnum = 1;
so->so_snd.sb_flags &= ~SB_SEL;
goto done;
}
selrecord(procp, &so->so_snd.sb_sel, wql);
break;
case 0:
so->so_rcv.sb_flags |= SB_SEL;
if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) {
retnum = 1;
so->so_rcv.sb_flags &= ~SB_SEL;
goto done;
}
selrecord(procp, &so->so_rcv.sb_sel, wql);
break;
}
done:
socket_unlock(so, 1);
return (retnum);
}
int
soo_stat(struct socket *so, void *ub, int isstat64)
{
int ret;
struct stat *sb = (struct stat *)0;
struct stat64 *sb64 = (struct stat64 *)0;
#if CONFIG_MACF_SOCKET
ret = mac_socket_check_stat(kauth_cred_get(), so);
if (ret)
return (ret);
#endif
if (isstat64 != 0) {
sb64 = (struct stat64 *)ub;
bzero((caddr_t)sb64, sizeof (*sb64));
} else {
sb = (struct stat *)ub;
bzero((caddr_t)sb, sizeof (*sb));
}
socket_lock(so, 1);
if (isstat64 != 0) {
sb64->st_mode = S_IFSOCK;
if ((so->so_state & SS_CANTRCVMORE) == 0 ||
so->so_rcv.sb_cc != 0)
sb64->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
if ((so->so_state & SS_CANTSENDMORE) == 0)
sb64->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
sb64->st_size = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
sb64->st_uid = so->so_uid;
sb64->st_gid = -1;
} else {
sb->st_mode = S_IFSOCK;
if ((so->so_state & SS_CANTRCVMORE) == 0 ||
so->so_rcv.sb_cc != 0)
sb->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
if ((so->so_state & SS_CANTSENDMORE) == 0)
sb->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
sb->st_size = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
sb->st_uid = so->so_uid;
sb->st_gid = -1;
}
ret = (*so->so_proto->pr_usrreqs->pru_sense)(so, ub, isstat64);
socket_unlock(so, 1);
return (ret);
}
static int
soo_close(struct fileglob *fg, __unused vfs_context_t ctx)
{
int error = 0;
struct socket *sp;
sp = (struct socket *)fg->fg_data;
fg->fg_data = NULL;
if (sp)
error = soclose(sp);
return (error);
}
static int
soo_drain(struct fileproc *fp, __unused vfs_context_t ctx)
{
int error = 0;
struct socket *so = (struct socket *)fp->f_fglob->fg_data;
if (so) {
socket_lock(so, 1);
so->so_state |= SS_DRAINING;
wakeup((caddr_t)&so->so_timeo);
sorwakeup(so);
sowwakeup(so);
socket_unlock(so, 1);
}
return (error);
}