2164 lines
44 KiB
C
2164 lines
44 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1989, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* sendfile(2) and related extensions:
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* Copyright (c) 1998, David Greenman. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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#include "opt_ktrace.h"
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#include "opt_mac.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mac.h>
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#include <sys/mutex.h>
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#include <sys/sysproto.h>
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#include <sys/malloc.h>
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#include <sys/filedesc.h>
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#include <sys/event.h>
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#include <sys/proc.h>
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#include <sys/fcntl.h>
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#include <sys/file.h>
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#include <sys/filio.h>
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#include <sys/mount.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/sf_buf.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/signalvar.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysctl.h>
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#include <sys/uio.h>
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#include <sys/vnode.h>
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#ifdef KTRACE
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#include <sys/ktrace.h>
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#endif
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/vm_pageout.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_extern.h>
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static int sendit(struct thread *td, int s, struct msghdr *mp, int flags);
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static int recvit(struct thread *td, int s, struct msghdr *mp, void *namelenp);
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static int accept1(struct thread *td, struct accept_args *uap, int compat);
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static int do_sendfile(struct thread *td, struct sendfile_args *uap, int compat);
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static int getsockname1(struct thread *td, struct getsockname_args *uap,
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int compat);
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static int getpeername1(struct thread *td, struct getpeername_args *uap,
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int compat);
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/*
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* NSFBUFS-related variables and associated sysctls
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*/
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int nsfbufs;
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int nsfbufspeak;
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int nsfbufsused;
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SYSCTL_DECL(_kern_ipc);
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SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufs, CTLFLAG_RDTUN, &nsfbufs, 0,
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"Maximum number of sendfile(2) sf_bufs available");
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SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufspeak, CTLFLAG_RD, &nsfbufspeak, 0,
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"Number of sendfile(2) sf_bufs at peak usage");
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SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufsused, CTLFLAG_RD, &nsfbufsused, 0,
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"Number of sendfile(2) sf_bufs in use");
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/*
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* Convert a user file descriptor to a kernel file entry. A reference on the
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* file entry is held upon returning. This is lighter weight than
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* fgetsock(), which bumps the socket reference drops the file reference
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* count instead, as this approach avoids several additional mutex operations
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* associated with the additional reference count.
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*/
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static int
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getsock(struct filedesc *fdp, int fd, struct file **fpp)
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{
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struct file *fp;
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int error;
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fp = NULL;
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if (fdp == NULL)
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error = EBADF;
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else {
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FILEDESC_LOCK_FAST(fdp);
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fp = fget_locked(fdp, fd);
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if (fp == NULL)
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error = EBADF;
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else if (fp->f_type != DTYPE_SOCKET) {
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fp = NULL;
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error = ENOTSOCK;
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} else {
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fhold(fp);
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error = 0;
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}
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FILEDESC_UNLOCK_FAST(fdp);
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}
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*fpp = fp;
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return (error);
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}
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/*
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* System call interface to the socket abstraction.
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*/
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#if defined(COMPAT_43)
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#define COMPAT_OLDSOCK
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#endif
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/*
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* MPSAFE
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*/
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int
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socket(td, uap)
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struct thread *td;
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register struct socket_args /* {
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int domain;
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int type;
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int protocol;
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} */ *uap;
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{
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struct filedesc *fdp;
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struct socket *so;
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struct file *fp;
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int fd, error;
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#ifdef MAC
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error = mac_check_socket_create(td->td_ucred, uap->domain, uap->type,
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uap->protocol);
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if (error)
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return (error);
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#endif
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fdp = td->td_proc->p_fd;
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error = falloc(td, &fp, &fd);
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if (error)
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return (error);
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/* An extra reference on `fp' has been held for us by falloc(). */
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NET_LOCK_GIANT();
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error = socreate(uap->domain, &so, uap->type, uap->protocol,
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td->td_ucred, td);
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NET_UNLOCK_GIANT();
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if (error) {
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fdclose(fdp, fp, fd, td);
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} else {
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FILEDESC_LOCK_FAST(fdp);
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fp->f_data = so; /* already has ref count */
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fp->f_flag = FREAD|FWRITE;
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fp->f_ops = &socketops;
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fp->f_type = DTYPE_SOCKET;
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FILEDESC_UNLOCK_FAST(fdp);
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td->td_retval[0] = fd;
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}
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fdrop(fp, td);
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return (error);
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}
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/*
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* MPSAFE
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*/
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/* ARGSUSED */
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int
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bind(td, uap)
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struct thread *td;
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register struct bind_args /* {
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int s;
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caddr_t name;
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int namelen;
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} */ *uap;
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{
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struct sockaddr *sa;
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int error;
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if ((error = getsockaddr(&sa, uap->name, uap->namelen)) != 0)
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return (error);
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return (kern_bind(td, uap->s, sa));
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}
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int
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kern_bind(td, fd, sa)
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struct thread *td;
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int fd;
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struct sockaddr *sa;
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{
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struct socket *so;
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struct file *fp;
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int error;
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NET_LOCK_GIANT();
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error = getsock(td->td_proc->p_fd, fd, &fp);
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if (error)
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goto done2;
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so = fp->f_data;
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#ifdef MAC
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SOCK_LOCK(so);
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error = mac_check_socket_bind(td->td_ucred, so, sa);
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SOCK_UNLOCK(so);
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if (error)
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goto done1;
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#endif
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error = sobind(so, sa, td);
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#ifdef MAC
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done1:
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#endif
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fdrop(fp, td);
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done2:
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NET_UNLOCK_GIANT();
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FREE(sa, M_SONAME);
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return (error);
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}
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/*
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* MPSAFE
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*/
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/* ARGSUSED */
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int
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listen(td, uap)
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struct thread *td;
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register struct listen_args /* {
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int s;
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int backlog;
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} */ *uap;
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{
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struct socket *so;
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struct file *fp;
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int error;
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NET_LOCK_GIANT();
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error = getsock(td->td_proc->p_fd, uap->s, &fp);
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if (error == 0) {
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so = fp->f_data;
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#ifdef MAC
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SOCK_LOCK(so);
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error = mac_check_socket_listen(td->td_ucred, so);
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SOCK_UNLOCK(so);
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if (error)
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goto done;
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#endif
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error = solisten(so, uap->backlog, td);
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#ifdef MAC
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done:
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#endif
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fdrop(fp, td);
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}
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NET_UNLOCK_GIANT();
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return(error);
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}
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/*
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* accept1()
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* MPSAFE
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*/
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static int
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accept1(td, uap, compat)
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struct thread *td;
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register struct accept_args /* {
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int s;
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struct sockaddr * __restrict name;
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socklen_t * __restrict anamelen;
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} */ *uap;
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int compat;
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{
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struct filedesc *fdp;
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struct file *nfp = NULL;
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struct sockaddr *sa = NULL;
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socklen_t namelen;
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int error;
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struct socket *head, *so;
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int fd;
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u_int fflag;
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pid_t pgid;
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int tmp;
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fdp = td->td_proc->p_fd;
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if (uap->name) {
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error = copyin(uap->anamelen, &namelen, sizeof (namelen));
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if(error)
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return (error);
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if (namelen < 0)
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return (EINVAL);
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}
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NET_LOCK_GIANT();
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error = fgetsock(td, uap->s, &head, &fflag);
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if (error)
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goto done2;
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if ((head->so_options & SO_ACCEPTCONN) == 0) {
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error = EINVAL;
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goto done;
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}
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#ifdef MAC
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SOCK_LOCK(head);
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error = mac_check_socket_accept(td->td_ucred, head);
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SOCK_UNLOCK(head);
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if (error != 0)
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goto done;
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#endif
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error = falloc(td, &nfp, &fd);
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if (error)
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goto done;
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ACCEPT_LOCK();
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if ((head->so_state & SS_NBIO) && TAILQ_EMPTY(&head->so_comp)) {
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ACCEPT_UNLOCK();
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error = EWOULDBLOCK;
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goto noconnection;
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}
|
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while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0) {
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if (head->so_rcv.sb_state & SBS_CANTRCVMORE) {
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head->so_error = ECONNABORTED;
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break;
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}
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error = msleep(&head->so_timeo, &accept_mtx, PSOCK | PCATCH,
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"accept", 0);
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if (error) {
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ACCEPT_UNLOCK();
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goto noconnection;
|
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}
|
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}
|
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if (head->so_error) {
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error = head->so_error;
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head->so_error = 0;
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ACCEPT_UNLOCK();
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goto noconnection;
|
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}
|
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so = TAILQ_FIRST(&head->so_comp);
|
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KASSERT(!(so->so_qstate & SQ_INCOMP), ("accept1: so SQ_INCOMP"));
|
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KASSERT(so->so_qstate & SQ_COMP, ("accept1: so not SQ_COMP"));
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|
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/*
|
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* Before changing the flags on the socket, we have to bump the
|
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* reference count. Otherwise, if the protocol calls sofree(),
|
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* the socket will be released due to a zero refcount.
|
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*/
|
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SOCK_LOCK(so); /* soref() and so_state update */
|
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soref(so); /* file descriptor reference */
|
|
|
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TAILQ_REMOVE(&head->so_comp, so, so_list);
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head->so_qlen--;
|
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so->so_state |= (head->so_state & SS_NBIO);
|
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so->so_qstate &= ~SQ_COMP;
|
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so->so_head = NULL;
|
|
|
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SOCK_UNLOCK(so);
|
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ACCEPT_UNLOCK();
|
|
|
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/* An extra reference on `nfp' has been held for us by falloc(). */
|
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td->td_retval[0] = fd;
|
|
|
|
/* connection has been removed from the listen queue */
|
|
KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0);
|
|
|
|
pgid = fgetown(&head->so_sigio);
|
|
if (pgid != 0)
|
|
fsetown(pgid, &so->so_sigio);
|
|
|
|
FILE_LOCK(nfp);
|
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nfp->f_data = so; /* nfp has ref count from falloc */
|
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nfp->f_flag = fflag;
|
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nfp->f_ops = &socketops;
|
|
nfp->f_type = DTYPE_SOCKET;
|
|
FILE_UNLOCK(nfp);
|
|
/* Sync socket nonblocking/async state with file flags */
|
|
tmp = fflag & FNONBLOCK;
|
|
(void) fo_ioctl(nfp, FIONBIO, &tmp, td->td_ucred, td);
|
|
tmp = fflag & FASYNC;
|
|
(void) fo_ioctl(nfp, FIOASYNC, &tmp, td->td_ucred, td);
|
|
sa = 0;
|
|
error = soaccept(so, &sa);
|
|
if (error) {
|
|
/*
|
|
* return a namelen of zero for older code which might
|
|
* ignore the return value from accept.
|
|
*/
|
|
if (uap->name != NULL) {
|
|
namelen = 0;
|
|
(void) copyout(&namelen,
|
|
uap->anamelen, sizeof(*uap->anamelen));
|
|
}
|
|
goto noconnection;
|
|
}
|
|
if (sa == NULL) {
|
|
namelen = 0;
|
|
if (uap->name)
|
|
goto gotnoname;
|
|
error = 0;
|
|
goto done;
|
|
}
|
|
if (uap->name) {
|
|
/* check sa_len before it is destroyed */
|
|
if (namelen > sa->sa_len)
|
|
namelen = sa->sa_len;
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (compat)
|
|
((struct osockaddr *)sa)->sa_family =
|
|
sa->sa_family;
|
|
#endif
|
|
error = copyout(sa, uap->name, (u_int)namelen);
|
|
if (!error)
|
|
gotnoname:
|
|
error = copyout(&namelen,
|
|
uap->anamelen, sizeof (*uap->anamelen));
|
|
}
|
|
noconnection:
|
|
if (sa)
|
|
FREE(sa, M_SONAME);
|
|
|
|
/*
|
|
* close the new descriptor, assuming someone hasn't ripped it
|
|
* out from under us.
|
|
*/
|
|
if (error)
|
|
fdclose(fdp, nfp, fd, td);
|
|
|
|
/*
|
|
* Release explicitly held references before returning.
|
|
*/
|
|
done:
|
|
if (nfp != NULL)
|
|
fdrop(nfp, td);
|
|
fputsock(head);
|
|
done2:
|
|
NET_UNLOCK_GIANT();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE (accept1() is MPSAFE)
|
|
*/
|
|
int
|
|
accept(td, uap)
|
|
struct thread *td;
|
|
struct accept_args *uap;
|
|
{
|
|
|
|
return (accept1(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE (accept1() is MPSAFE)
|
|
*/
|
|
int
|
|
oaccept(td, uap)
|
|
struct thread *td;
|
|
struct accept_args *uap;
|
|
{
|
|
|
|
return (accept1(td, uap, 1));
|
|
}
|
|
#endif /* COMPAT_OLDSOCK */
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
connect(td, uap)
|
|
struct thread *td;
|
|
register struct connect_args /* {
|
|
int s;
|
|
caddr_t name;
|
|
int namelen;
|
|
} */ *uap;
|
|
{
|
|
struct sockaddr *sa;
|
|
int error;
|
|
|
|
error = getsockaddr(&sa, uap->name, uap->namelen);
|
|
if (error)
|
|
return (error);
|
|
|
|
return (kern_connect(td, uap->s, sa));
|
|
}
|
|
|
|
|
|
int
|
|
kern_connect(td, fd, sa)
|
|
struct thread *td;
|
|
int fd;
|
|
struct sockaddr *sa;
|
|
{
|
|
struct socket *so;
|
|
struct file *fp;
|
|
int error;
|
|
int interrupted = 0;
|
|
|
|
NET_LOCK_GIANT();
|
|
error = getsock(td->td_proc->p_fd, fd, &fp);
|
|
if (error)
|
|
goto done2;
|
|
so = fp->f_data;
|
|
if (so->so_state & SS_ISCONNECTING) {
|
|
error = EALREADY;
|
|
goto done1;
|
|
}
|
|
#ifdef MAC
|
|
SOCK_LOCK(so);
|
|
error = mac_check_socket_connect(td->td_ucred, so, sa);
|
|
SOCK_UNLOCK(so);
|
|
if (error)
|
|
goto bad;
|
|
#endif
|
|
error = soconnect(so, sa, td);
|
|
if (error)
|
|
goto bad;
|
|
if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
|
|
error = EINPROGRESS;
|
|
goto done1;
|
|
}
|
|
SOCK_LOCK(so);
|
|
while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
|
|
error = msleep(&so->so_timeo, SOCK_MTX(so), PSOCK | PCATCH,
|
|
"connec", 0);
|
|
if (error) {
|
|
if (error == EINTR || error == ERESTART)
|
|
interrupted = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (error == 0) {
|
|
error = so->so_error;
|
|
so->so_error = 0;
|
|
}
|
|
SOCK_UNLOCK(so);
|
|
bad:
|
|
if (!interrupted)
|
|
so->so_state &= ~SS_ISCONNECTING;
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
done1:
|
|
fdrop(fp, td);
|
|
done2:
|
|
NET_UNLOCK_GIANT();
|
|
FREE(sa, M_SONAME);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
socketpair(td, uap)
|
|
struct thread *td;
|
|
register struct socketpair_args /* {
|
|
int domain;
|
|
int type;
|
|
int protocol;
|
|
int *rsv;
|
|
} */ *uap;
|
|
{
|
|
register struct filedesc *fdp = td->td_proc->p_fd;
|
|
struct file *fp1, *fp2;
|
|
struct socket *so1, *so2;
|
|
int fd, error, sv[2];
|
|
|
|
#ifdef MAC
|
|
/* We might want to have a separate check for socket pairs. */
|
|
error = mac_check_socket_create(td->td_ucred, uap->domain, uap->type,
|
|
uap->protocol);
|
|
if (error)
|
|
return (error);
|
|
#endif
|
|
|
|
NET_LOCK_GIANT();
|
|
error = socreate(uap->domain, &so1, uap->type, uap->protocol,
|
|
td->td_ucred, td);
|
|
if (error)
|
|
goto done2;
|
|
error = socreate(uap->domain, &so2, uap->type, uap->protocol,
|
|
td->td_ucred, td);
|
|
if (error)
|
|
goto free1;
|
|
/* On success extra reference to `fp1' and 'fp2' is set by falloc. */
|
|
error = falloc(td, &fp1, &fd);
|
|
if (error)
|
|
goto free2;
|
|
sv[0] = fd;
|
|
fp1->f_data = so1; /* so1 already has ref count */
|
|
error = falloc(td, &fp2, &fd);
|
|
if (error)
|
|
goto free3;
|
|
fp2->f_data = so2; /* so2 already has ref count */
|
|
sv[1] = fd;
|
|
error = soconnect2(so1, so2);
|
|
if (error)
|
|
goto free4;
|
|
if (uap->type == SOCK_DGRAM) {
|
|
/*
|
|
* Datagram socket connection is asymmetric.
|
|
*/
|
|
error = soconnect2(so2, so1);
|
|
if (error)
|
|
goto free4;
|
|
}
|
|
FILE_LOCK(fp1);
|
|
fp1->f_flag = FREAD|FWRITE;
|
|
fp1->f_ops = &socketops;
|
|
fp1->f_type = DTYPE_SOCKET;
|
|
FILE_UNLOCK(fp1);
|
|
FILE_LOCK(fp2);
|
|
fp2->f_flag = FREAD|FWRITE;
|
|
fp2->f_ops = &socketops;
|
|
fp2->f_type = DTYPE_SOCKET;
|
|
FILE_UNLOCK(fp2);
|
|
error = copyout(sv, uap->rsv, 2 * sizeof (int));
|
|
fdrop(fp1, td);
|
|
fdrop(fp2, td);
|
|
goto done2;
|
|
free4:
|
|
fdclose(fdp, fp2, sv[1], td);
|
|
fdrop(fp2, td);
|
|
free3:
|
|
fdclose(fdp, fp1, sv[0], td);
|
|
fdrop(fp1, td);
|
|
free2:
|
|
(void)soclose(so2);
|
|
free1:
|
|
(void)soclose(so1);
|
|
done2:
|
|
NET_UNLOCK_GIANT();
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
sendit(td, s, mp, flags)
|
|
register struct thread *td;
|
|
int s;
|
|
register struct msghdr *mp;
|
|
int flags;
|
|
{
|
|
struct mbuf *control;
|
|
struct sockaddr *to;
|
|
int error;
|
|
|
|
if (mp->msg_name != NULL) {
|
|
error = getsockaddr(&to, mp->msg_name, mp->msg_namelen);
|
|
if (error) {
|
|
to = NULL;
|
|
goto bad;
|
|
}
|
|
mp->msg_name = to;
|
|
} else {
|
|
to = NULL;
|
|
}
|
|
|
|
if (mp->msg_control) {
|
|
if (mp->msg_controllen < sizeof(struct cmsghdr)
|
|
#ifdef COMPAT_OLDSOCK
|
|
&& mp->msg_flags != MSG_COMPAT
|
|
#endif
|
|
) {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
error = sockargs(&control, mp->msg_control,
|
|
mp->msg_controllen, MT_CONTROL);
|
|
if (error)
|
|
goto bad;
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (mp->msg_flags == MSG_COMPAT) {
|
|
register struct cmsghdr *cm;
|
|
|
|
M_PREPEND(control, sizeof(*cm), M_TRYWAIT);
|
|
if (control == 0) {
|
|
error = ENOBUFS;
|
|
goto bad;
|
|
} else {
|
|
cm = mtod(control, struct cmsghdr *);
|
|
cm->cmsg_len = control->m_len;
|
|
cm->cmsg_level = SOL_SOCKET;
|
|
cm->cmsg_type = SCM_RIGHTS;
|
|
}
|
|
}
|
|
#endif
|
|
} else {
|
|
control = NULL;
|
|
}
|
|
|
|
error = kern_sendit(td, s, mp, flags, control, UIO_USERSPACE);
|
|
|
|
bad:
|
|
if (to)
|
|
FREE(to, M_SONAME);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_sendit(td, s, mp, flags, control, segflg)
|
|
struct thread *td;
|
|
int s;
|
|
struct msghdr *mp;
|
|
int flags;
|
|
struct mbuf *control;
|
|
enum uio_seg segflg;
|
|
{
|
|
struct file *fp;
|
|
struct uio auio;
|
|
struct iovec *iov;
|
|
struct socket *so;
|
|
int i;
|
|
int len, error;
|
|
#ifdef KTRACE
|
|
struct uio *ktruio = NULL;
|
|
#endif
|
|
|
|
NET_LOCK_GIANT();
|
|
error = getsock(td->td_proc->p_fd, s, &fp);
|
|
if (error)
|
|
goto bad2;
|
|
so = (struct socket *)fp->f_data;
|
|
|
|
#ifdef MAC
|
|
SOCK_LOCK(so);
|
|
error = mac_check_socket_send(td->td_ucred, so);
|
|
SOCK_UNLOCK(so);
|
|
if (error)
|
|
goto bad;
|
|
#endif
|
|
|
|
auio.uio_iov = mp->msg_iov;
|
|
auio.uio_iovcnt = mp->msg_iovlen;
|
|
auio.uio_segflg = segflg;
|
|
auio.uio_rw = UIO_WRITE;
|
|
auio.uio_td = td;
|
|
auio.uio_offset = 0; /* XXX */
|
|
auio.uio_resid = 0;
|
|
iov = mp->msg_iov;
|
|
for (i = 0; i < mp->msg_iovlen; i++, iov++) {
|
|
if ((auio.uio_resid += iov->iov_len) < 0) {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
}
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_GENIO))
|
|
ktruio = cloneuio(&auio);
|
|
#endif
|
|
len = auio.uio_resid;
|
|
error = so->so_proto->pr_usrreqs->pru_sosend(so, mp->msg_name, &auio,
|
|
0, control, flags, td);
|
|
if (error) {
|
|
if (auio.uio_resid != len && (error == ERESTART ||
|
|
error == EINTR || error == EWOULDBLOCK))
|
|
error = 0;
|
|
/* Generation of SIGPIPE can be controlled per socket */
|
|
if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
|
|
!(flags & MSG_NOSIGNAL)) {
|
|
PROC_LOCK(td->td_proc);
|
|
psignal(td->td_proc, SIGPIPE);
|
|
PROC_UNLOCK(td->td_proc);
|
|
}
|
|
}
|
|
if (error == 0)
|
|
td->td_retval[0] = len - auio.uio_resid;
|
|
#ifdef KTRACE
|
|
if (ktruio != NULL) {
|
|
ktruio->uio_resid = td->td_retval[0];
|
|
ktrgenio(s, UIO_WRITE, ktruio, error);
|
|
}
|
|
#endif
|
|
bad:
|
|
fdrop(fp, td);
|
|
bad2:
|
|
NET_UNLOCK_GIANT();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
sendto(td, uap)
|
|
struct thread *td;
|
|
register struct sendto_args /* {
|
|
int s;
|
|
caddr_t buf;
|
|
size_t len;
|
|
int flags;
|
|
caddr_t to;
|
|
int tolen;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
int error;
|
|
|
|
msg.msg_name = uap->to;
|
|
msg.msg_namelen = uap->tolen;
|
|
msg.msg_iov = &aiov;
|
|
msg.msg_iovlen = 1;
|
|
msg.msg_control = 0;
|
|
#ifdef COMPAT_OLDSOCK
|
|
msg.msg_flags = 0;
|
|
#endif
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->len;
|
|
error = sendit(td, uap->s, &msg, uap->flags);
|
|
return (error);
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
osend(td, uap)
|
|
struct thread *td;
|
|
register struct osend_args /* {
|
|
int s;
|
|
caddr_t buf;
|
|
int len;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
int error;
|
|
|
|
msg.msg_name = 0;
|
|
msg.msg_namelen = 0;
|
|
msg.msg_iov = &aiov;
|
|
msg.msg_iovlen = 1;
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->len;
|
|
msg.msg_control = 0;
|
|
msg.msg_flags = 0;
|
|
error = sendit(td, uap->s, &msg, uap->flags);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
osendmsg(td, uap)
|
|
struct thread *td;
|
|
struct osendmsg_args /* {
|
|
int s;
|
|
caddr_t msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
|
|
if (error)
|
|
return (error);
|
|
error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
|
|
if (error)
|
|
return (error);
|
|
msg.msg_iov = iov;
|
|
msg.msg_flags = MSG_COMPAT;
|
|
error = sendit(td, uap->s, &msg, uap->flags);
|
|
free(iov, M_IOV);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
sendmsg(td, uap)
|
|
struct thread *td;
|
|
struct sendmsg_args /* {
|
|
int s;
|
|
caddr_t msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (msg));
|
|
if (error)
|
|
return (error);
|
|
error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
|
|
if (error)
|
|
return (error);
|
|
msg.msg_iov = iov;
|
|
#ifdef COMPAT_OLDSOCK
|
|
msg.msg_flags = 0;
|
|
#endif
|
|
error = sendit(td, uap->s, &msg, uap->flags);
|
|
free(iov, M_IOV);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_recvit(td, s, mp, namelenp, segflg, controlp)
|
|
struct thread *td;
|
|
int s;
|
|
struct msghdr *mp;
|
|
void *namelenp;
|
|
enum uio_seg segflg;
|
|
struct mbuf **controlp;
|
|
{
|
|
struct uio auio;
|
|
struct iovec *iov;
|
|
int i;
|
|
socklen_t len;
|
|
int error;
|
|
struct mbuf *m, *control = 0;
|
|
caddr_t ctlbuf;
|
|
struct file *fp;
|
|
struct socket *so;
|
|
struct sockaddr *fromsa = 0;
|
|
#ifdef KTRACE
|
|
struct uio *ktruio = NULL;
|
|
#endif
|
|
|
|
if(controlp != NULL)
|
|
*controlp = 0;
|
|
|
|
NET_LOCK_GIANT();
|
|
error = getsock(td->td_proc->p_fd, s, &fp);
|
|
if (error) {
|
|
NET_UNLOCK_GIANT();
|
|
return (error);
|
|
}
|
|
so = fp->f_data;
|
|
|
|
#ifdef MAC
|
|
SOCK_LOCK(so);
|
|
error = mac_check_socket_receive(td->td_ucred, so);
|
|
SOCK_UNLOCK(so);
|
|
if (error) {
|
|
fdrop(fp, td);
|
|
NET_UNLOCK_GIANT();
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
auio.uio_iov = mp->msg_iov;
|
|
auio.uio_iovcnt = mp->msg_iovlen;
|
|
auio.uio_segflg = segflg;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_td = td;
|
|
auio.uio_offset = 0; /* XXX */
|
|
auio.uio_resid = 0;
|
|
iov = mp->msg_iov;
|
|
for (i = 0; i < mp->msg_iovlen; i++, iov++) {
|
|
if ((auio.uio_resid += iov->iov_len) < 0) {
|
|
fdrop(fp, td);
|
|
NET_UNLOCK_GIANT();
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_GENIO))
|
|
ktruio = cloneuio(&auio);
|
|
#endif
|
|
len = auio.uio_resid;
|
|
error = so->so_proto->pr_usrreqs->pru_soreceive(so, &fromsa, &auio,
|
|
(struct mbuf **)0,
|
|
(mp->msg_control || controlp) ? &control : (struct mbuf **)0,
|
|
&mp->msg_flags);
|
|
if (error) {
|
|
if (auio.uio_resid != (int)len && (error == ERESTART ||
|
|
error == EINTR || error == EWOULDBLOCK))
|
|
error = 0;
|
|
}
|
|
#ifdef KTRACE
|
|
if (ktruio != NULL) {
|
|
ktruio->uio_resid = (int)len - auio.uio_resid;
|
|
ktrgenio(s, UIO_READ, ktruio, error);
|
|
}
|
|
#endif
|
|
if (error)
|
|
goto out;
|
|
td->td_retval[0] = (int)len - auio.uio_resid;
|
|
if (mp->msg_name) {
|
|
len = mp->msg_namelen;
|
|
if (len <= 0 || fromsa == 0)
|
|
len = 0;
|
|
else {
|
|
/* save sa_len before it is destroyed by MSG_COMPAT */
|
|
len = MIN(len, fromsa->sa_len);
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (mp->msg_flags & MSG_COMPAT)
|
|
((struct osockaddr *)fromsa)->sa_family =
|
|
fromsa->sa_family;
|
|
#endif
|
|
error = copyout(fromsa, mp->msg_name, (unsigned)len);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
mp->msg_namelen = len;
|
|
if (namelenp &&
|
|
(error = copyout(&len, namelenp, sizeof (socklen_t)))) {
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (mp->msg_flags & MSG_COMPAT)
|
|
error = 0; /* old recvfrom didn't check */
|
|
else
|
|
#endif
|
|
goto out;
|
|
}
|
|
}
|
|
if (mp->msg_control && controlp == NULL) {
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* We assume that old recvmsg calls won't receive access
|
|
* rights and other control info, esp. as control info
|
|
* is always optional and those options didn't exist in 4.3.
|
|
* If we receive rights, trim the cmsghdr; anything else
|
|
* is tossed.
|
|
*/
|
|
if (control && mp->msg_flags & MSG_COMPAT) {
|
|
if (mtod(control, struct cmsghdr *)->cmsg_level !=
|
|
SOL_SOCKET ||
|
|
mtod(control, struct cmsghdr *)->cmsg_type !=
|
|
SCM_RIGHTS) {
|
|
mp->msg_controllen = 0;
|
|
goto out;
|
|
}
|
|
control->m_len -= sizeof (struct cmsghdr);
|
|
control->m_data += sizeof (struct cmsghdr);
|
|
}
|
|
#endif
|
|
len = mp->msg_controllen;
|
|
m = control;
|
|
mp->msg_controllen = 0;
|
|
ctlbuf = mp->msg_control;
|
|
|
|
while (m && len > 0) {
|
|
unsigned int tocopy;
|
|
|
|
if (len >= m->m_len)
|
|
tocopy = m->m_len;
|
|
else {
|
|
mp->msg_flags |= MSG_CTRUNC;
|
|
tocopy = len;
|
|
}
|
|
|
|
if ((error = copyout(mtod(m, caddr_t),
|
|
ctlbuf, tocopy)) != 0)
|
|
goto out;
|
|
|
|
ctlbuf += tocopy;
|
|
len -= tocopy;
|
|
m = m->m_next;
|
|
}
|
|
mp->msg_controllen = ctlbuf - (caddr_t)mp->msg_control;
|
|
}
|
|
out:
|
|
fdrop(fp, td);
|
|
NET_UNLOCK_GIANT();
|
|
if (fromsa)
|
|
FREE(fromsa, M_SONAME);
|
|
|
|
if (error == 0 && controlp != NULL)
|
|
*controlp = control;
|
|
else if (control)
|
|
m_freem(control);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
recvit(td, s, mp, namelenp)
|
|
struct thread *td;
|
|
int s;
|
|
struct msghdr *mp;
|
|
void *namelenp;
|
|
{
|
|
|
|
return (kern_recvit(td, s, mp, namelenp, UIO_USERSPACE, NULL));
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
recvfrom(td, uap)
|
|
struct thread *td;
|
|
register struct recvfrom_args /* {
|
|
int s;
|
|
caddr_t buf;
|
|
size_t len;
|
|
int flags;
|
|
struct sockaddr * __restrict from;
|
|
socklen_t * __restrict fromlenaddr;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
int error;
|
|
|
|
if (uap->fromlenaddr) {
|
|
error = copyin(uap->fromlenaddr,
|
|
&msg.msg_namelen, sizeof (msg.msg_namelen));
|
|
if (error)
|
|
goto done2;
|
|
} else {
|
|
msg.msg_namelen = 0;
|
|
}
|
|
msg.msg_name = uap->from;
|
|
msg.msg_iov = &aiov;
|
|
msg.msg_iovlen = 1;
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->len;
|
|
msg.msg_control = 0;
|
|
msg.msg_flags = uap->flags;
|
|
error = recvit(td, uap->s, &msg, uap->fromlenaddr);
|
|
done2:
|
|
return(error);
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
orecvfrom(td, uap)
|
|
struct thread *td;
|
|
struct recvfrom_args *uap;
|
|
{
|
|
|
|
uap->flags |= MSG_COMPAT;
|
|
return (recvfrom(td, uap));
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
orecv(td, uap)
|
|
struct thread *td;
|
|
register struct orecv_args /* {
|
|
int s;
|
|
caddr_t buf;
|
|
int len;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec aiov;
|
|
int error;
|
|
|
|
msg.msg_name = 0;
|
|
msg.msg_namelen = 0;
|
|
msg.msg_iov = &aiov;
|
|
msg.msg_iovlen = 1;
|
|
aiov.iov_base = uap->buf;
|
|
aiov.iov_len = uap->len;
|
|
msg.msg_control = 0;
|
|
msg.msg_flags = uap->flags;
|
|
error = recvit(td, uap->s, &msg, NULL);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Old recvmsg. This code takes advantage of the fact that the old msghdr
|
|
* overlays the new one, missing only the flags, and with the (old) access
|
|
* rights where the control fields are now.
|
|
*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
orecvmsg(td, uap)
|
|
struct thread *td;
|
|
struct orecvmsg_args /* {
|
|
int s;
|
|
struct omsghdr *msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
|
|
if (error)
|
|
return (error);
|
|
error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
|
|
if (error)
|
|
return (error);
|
|
msg.msg_flags = uap->flags | MSG_COMPAT;
|
|
msg.msg_iov = iov;
|
|
error = recvit(td, uap->s, &msg, &uap->msg->msg_namelen);
|
|
if (msg.msg_controllen && error == 0)
|
|
error = copyout(&msg.msg_controllen,
|
|
&uap->msg->msg_accrightslen, sizeof (int));
|
|
free(iov, M_IOV);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
recvmsg(td, uap)
|
|
struct thread *td;
|
|
struct recvmsg_args /* {
|
|
int s;
|
|
struct msghdr *msg;
|
|
int flags;
|
|
} */ *uap;
|
|
{
|
|
struct msghdr msg;
|
|
struct iovec *uiov, *iov;
|
|
int error;
|
|
|
|
error = copyin(uap->msg, &msg, sizeof (msg));
|
|
if (error)
|
|
return (error);
|
|
error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
|
|
if (error)
|
|
return (error);
|
|
msg.msg_flags = uap->flags;
|
|
#ifdef COMPAT_OLDSOCK
|
|
msg.msg_flags &= ~MSG_COMPAT;
|
|
#endif
|
|
uiov = msg.msg_iov;
|
|
msg.msg_iov = iov;
|
|
error = recvit(td, uap->s, &msg, NULL);
|
|
if (error == 0) {
|
|
msg.msg_iov = uiov;
|
|
error = copyout(&msg, uap->msg, sizeof(msg));
|
|
}
|
|
free(iov, M_IOV);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
shutdown(td, uap)
|
|
struct thread *td;
|
|
register struct shutdown_args /* {
|
|
int s;
|
|
int how;
|
|
} */ *uap;
|
|
{
|
|
struct socket *so;
|
|
struct file *fp;
|
|
int error;
|
|
|
|
NET_LOCK_GIANT();
|
|
error = getsock(td->td_proc->p_fd, uap->s, &fp);
|
|
if (error == 0) {
|
|
so = fp->f_data;
|
|
error = soshutdown(so, uap->how);
|
|
fdrop(fp, td);
|
|
}
|
|
NET_UNLOCK_GIANT();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
setsockopt(td, uap)
|
|
struct thread *td;
|
|
register struct setsockopt_args /* {
|
|
int s;
|
|
int level;
|
|
int name;
|
|
caddr_t val;
|
|
int valsize;
|
|
} */ *uap;
|
|
{
|
|
|
|
return (kern_setsockopt(td, uap->s, uap->level, uap->name,
|
|
uap->val, UIO_USERSPACE, uap->valsize));
|
|
}
|
|
|
|
int
|
|
kern_setsockopt(td, s, level, name, val, valseg, valsize)
|
|
struct thread *td;
|
|
int s;
|
|
int level;
|
|
int name;
|
|
void *val;
|
|
enum uio_seg valseg;
|
|
socklen_t valsize;
|
|
{
|
|
int error;
|
|
struct socket *so;
|
|
struct file *fp;
|
|
struct sockopt sopt;
|
|
|
|
if (val == NULL && valsize != 0)
|
|
return (EFAULT);
|
|
if (valsize < 0)
|
|
return (EINVAL);
|
|
|
|
sopt.sopt_dir = SOPT_SET;
|
|
sopt.sopt_level = level;
|
|
sopt.sopt_name = name;
|
|
sopt.sopt_val = val;
|
|
sopt.sopt_valsize = valsize;
|
|
switch (valseg) {
|
|
case UIO_USERSPACE:
|
|
sopt.sopt_td = td;
|
|
break;
|
|
case UIO_SYSSPACE:
|
|
sopt.sopt_td = NULL;
|
|
break;
|
|
default:
|
|
panic("kern_setsockopt called with bad valseg");
|
|
}
|
|
|
|
NET_LOCK_GIANT();
|
|
error = getsock(td->td_proc->p_fd, s, &fp);
|
|
if (error == 0) {
|
|
so = fp->f_data;
|
|
error = sosetopt(so, &sopt);
|
|
fdrop(fp, td);
|
|
}
|
|
NET_UNLOCK_GIANT();
|
|
return(error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
getsockopt(td, uap)
|
|
struct thread *td;
|
|
register struct getsockopt_args /* {
|
|
int s;
|
|
int level;
|
|
int name;
|
|
void * __restrict val;
|
|
socklen_t * __restrict avalsize;
|
|
} */ *uap;
|
|
{
|
|
socklen_t valsize;
|
|
int error;
|
|
|
|
if (uap->val) {
|
|
error = copyin(uap->avalsize, &valsize, sizeof (valsize));
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
error = kern_getsockopt(td, uap->s, uap->level, uap->name,
|
|
uap->val, UIO_USERSPACE, &valsize);
|
|
|
|
if (error == 0)
|
|
error = copyout(&valsize, uap->avalsize, sizeof (valsize));
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Kernel version of getsockopt.
|
|
* optval can be a userland or userspace. optlen is always a kernel pointer.
|
|
*/
|
|
int
|
|
kern_getsockopt(td, s, level, name, val, valseg, valsize)
|
|
struct thread *td;
|
|
int s;
|
|
int level;
|
|
int name;
|
|
void *val;
|
|
enum uio_seg valseg;
|
|
socklen_t *valsize;
|
|
{
|
|
int error;
|
|
struct socket *so;
|
|
struct file *fp;
|
|
struct sockopt sopt;
|
|
|
|
if (val == NULL)
|
|
*valsize = 0;
|
|
if (*valsize < 0)
|
|
return (EINVAL);
|
|
|
|
sopt.sopt_dir = SOPT_GET;
|
|
sopt.sopt_level = level;
|
|
sopt.sopt_name = name;
|
|
sopt.sopt_val = val;
|
|
sopt.sopt_valsize = (size_t)*valsize; /* checked non-negative above */
|
|
switch (valseg) {
|
|
case UIO_USERSPACE:
|
|
sopt.sopt_td = td;
|
|
break;
|
|
case UIO_SYSSPACE:
|
|
sopt.sopt_td = NULL;
|
|
break;
|
|
default:
|
|
panic("kern_getsockopt called with bad valseg");
|
|
}
|
|
|
|
NET_LOCK_GIANT();
|
|
error = getsock(td->td_proc->p_fd, s, &fp);
|
|
if (error == 0) {
|
|
so = fp->f_data;
|
|
error = sogetopt(so, &sopt);
|
|
*valsize = sopt.sopt_valsize;
|
|
fdrop(fp, td);
|
|
}
|
|
NET_UNLOCK_GIANT();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* getsockname1() - Get socket name.
|
|
*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
getsockname1(td, uap, compat)
|
|
struct thread *td;
|
|
register struct getsockname_args /* {
|
|
int fdes;
|
|
struct sockaddr * __restrict asa;
|
|
socklen_t * __restrict alen;
|
|
} */ *uap;
|
|
int compat;
|
|
{
|
|
struct socket *so;
|
|
struct sockaddr *sa;
|
|
struct file *fp;
|
|
socklen_t len;
|
|
int error;
|
|
|
|
NET_LOCK_GIANT();
|
|
error = getsock(td->td_proc->p_fd, uap->fdes, &fp);
|
|
if (error)
|
|
goto done2;
|
|
so = fp->f_data;
|
|
error = copyin(uap->alen, &len, sizeof (len));
|
|
if (error)
|
|
goto done1;
|
|
if (len < 0) {
|
|
error = EINVAL;
|
|
goto done1;
|
|
}
|
|
sa = 0;
|
|
error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, &sa);
|
|
if (error)
|
|
goto bad;
|
|
if (sa == 0) {
|
|
len = 0;
|
|
goto gotnothing;
|
|
}
|
|
|
|
len = MIN(len, sa->sa_len);
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (compat)
|
|
((struct osockaddr *)sa)->sa_family = sa->sa_family;
|
|
#endif
|
|
error = copyout(sa, uap->asa, (u_int)len);
|
|
if (error == 0)
|
|
gotnothing:
|
|
error = copyout(&len, uap->alen, sizeof (len));
|
|
bad:
|
|
if (sa)
|
|
FREE(sa, M_SONAME);
|
|
done1:
|
|
fdrop(fp, td);
|
|
done2:
|
|
NET_UNLOCK_GIANT();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
getsockname(td, uap)
|
|
struct thread *td;
|
|
struct getsockname_args *uap;
|
|
{
|
|
|
|
return (getsockname1(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
ogetsockname(td, uap)
|
|
struct thread *td;
|
|
struct getsockname_args *uap;
|
|
{
|
|
|
|
return (getsockname1(td, uap, 1));
|
|
}
|
|
#endif /* COMPAT_OLDSOCK */
|
|
|
|
/*
|
|
* getpeername1() - Get name of peer for connected socket.
|
|
*
|
|
* MPSAFE
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
getpeername1(td, uap, compat)
|
|
struct thread *td;
|
|
register struct getpeername_args /* {
|
|
int fdes;
|
|
struct sockaddr * __restrict asa;
|
|
socklen_t * __restrict alen;
|
|
} */ *uap;
|
|
int compat;
|
|
{
|
|
struct socket *so;
|
|
struct sockaddr *sa;
|
|
struct file *fp;
|
|
socklen_t len;
|
|
int error;
|
|
|
|
NET_LOCK_GIANT();
|
|
error = getsock(td->td_proc->p_fd, uap->fdes, &fp);
|
|
if (error)
|
|
goto done2;
|
|
so = fp->f_data;
|
|
if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) {
|
|
error = ENOTCONN;
|
|
goto done1;
|
|
}
|
|
error = copyin(uap->alen, &len, sizeof (len));
|
|
if (error)
|
|
goto done1;
|
|
if (len < 0) {
|
|
error = EINVAL;
|
|
goto done1;
|
|
}
|
|
sa = 0;
|
|
error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, &sa);
|
|
if (error)
|
|
goto bad;
|
|
if (sa == 0) {
|
|
len = 0;
|
|
goto gotnothing;
|
|
}
|
|
len = MIN(len, sa->sa_len);
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (compat)
|
|
((struct osockaddr *)sa)->sa_family =
|
|
sa->sa_family;
|
|
#endif
|
|
error = copyout(sa, uap->asa, (u_int)len);
|
|
if (error)
|
|
goto bad;
|
|
gotnothing:
|
|
error = copyout(&len, uap->alen, sizeof (len));
|
|
bad:
|
|
if (sa)
|
|
FREE(sa, M_SONAME);
|
|
done1:
|
|
fdrop(fp, td);
|
|
done2:
|
|
NET_UNLOCK_GIANT();
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
getpeername(td, uap)
|
|
struct thread *td;
|
|
struct getpeername_args *uap;
|
|
{
|
|
|
|
return (getpeername1(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_OLDSOCK
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
int
|
|
ogetpeername(td, uap)
|
|
struct thread *td;
|
|
struct ogetpeername_args *uap;
|
|
{
|
|
|
|
/* XXX uap should have type `getpeername_args *' to begin with. */
|
|
return (getpeername1(td, (struct getpeername_args *)uap, 1));
|
|
}
|
|
#endif /* COMPAT_OLDSOCK */
|
|
|
|
int
|
|
sockargs(mp, buf, buflen, type)
|
|
struct mbuf **mp;
|
|
caddr_t buf;
|
|
int buflen, type;
|
|
{
|
|
register struct sockaddr *sa;
|
|
register struct mbuf *m;
|
|
int error;
|
|
|
|
if ((u_int)buflen > MLEN) {
|
|
#ifdef COMPAT_OLDSOCK
|
|
if (type == MT_SONAME && (u_int)buflen <= 112)
|
|
buflen = MLEN; /* unix domain compat. hack */
|
|
else
|
|
#endif
|
|
if ((u_int)buflen > MCLBYTES)
|
|
return (EINVAL);
|
|
}
|
|
m = m_get(M_TRYWAIT, type);
|
|
if (m == NULL)
|
|
return (ENOBUFS);
|
|
if ((u_int)buflen > MLEN) {
|
|
MCLGET(m, M_TRYWAIT);
|
|
if ((m->m_flags & M_EXT) == 0) {
|
|
m_free(m);
|
|
return (ENOBUFS);
|
|
}
|
|
}
|
|
m->m_len = buflen;
|
|
error = copyin(buf, mtod(m, caddr_t), (u_int)buflen);
|
|
if (error)
|
|
(void) m_free(m);
|
|
else {
|
|
*mp = m;
|
|
if (type == MT_SONAME) {
|
|
sa = mtod(m, struct sockaddr *);
|
|
|
|
#if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
|
|
if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
|
|
sa->sa_family = sa->sa_len;
|
|
#endif
|
|
sa->sa_len = buflen;
|
|
}
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
getsockaddr(namp, uaddr, len)
|
|
struct sockaddr **namp;
|
|
caddr_t uaddr;
|
|
size_t len;
|
|
{
|
|
struct sockaddr *sa;
|
|
int error;
|
|
|
|
if (len > SOCK_MAXADDRLEN)
|
|
return (ENAMETOOLONG);
|
|
if (len < offsetof(struct sockaddr, sa_data[0]))
|
|
return (EINVAL);
|
|
MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK);
|
|
error = copyin(uaddr, sa, len);
|
|
if (error) {
|
|
FREE(sa, M_SONAME);
|
|
} else {
|
|
#if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
|
|
if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
|
|
sa->sa_family = sa->sa_len;
|
|
#endif
|
|
sa->sa_len = len;
|
|
*namp = sa;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Detach mapped page and release resources back to the system.
|
|
*/
|
|
void
|
|
sf_buf_mext(void *addr, void *args)
|
|
{
|
|
vm_page_t m;
|
|
|
|
m = sf_buf_page(args);
|
|
sf_buf_free(args);
|
|
vm_page_lock_queues();
|
|
vm_page_unwire(m, 0);
|
|
/*
|
|
* Check for the object going away on us. This can
|
|
* happen since we don't hold a reference to it.
|
|
* If so, we're responsible for freeing the page.
|
|
*/
|
|
if (m->wire_count == 0 && m->object == NULL)
|
|
vm_page_free(m);
|
|
vm_page_unlock_queues();
|
|
}
|
|
|
|
/*
|
|
* sendfile(2)
|
|
*
|
|
* MPSAFE
|
|
*
|
|
* int sendfile(int fd, int s, off_t offset, size_t nbytes,
|
|
* struct sf_hdtr *hdtr, off_t *sbytes, int flags)
|
|
*
|
|
* Send a file specified by 'fd' and starting at 'offset' to a socket
|
|
* specified by 's'. Send only 'nbytes' of the file or until EOF if
|
|
* nbytes == 0. Optionally add a header and/or trailer to the socket
|
|
* output. If specified, write the total number of bytes sent into *sbytes.
|
|
*
|
|
*/
|
|
int
|
|
sendfile(struct thread *td, struct sendfile_args *uap)
|
|
{
|
|
|
|
return (do_sendfile(td, uap, 0));
|
|
}
|
|
|
|
#ifdef COMPAT_FREEBSD4
|
|
int
|
|
freebsd4_sendfile(struct thread *td, struct freebsd4_sendfile_args *uap)
|
|
{
|
|
struct sendfile_args args;
|
|
|
|
args.fd = uap->fd;
|
|
args.s = uap->s;
|
|
args.offset = uap->offset;
|
|
args.nbytes = uap->nbytes;
|
|
args.hdtr = uap->hdtr;
|
|
args.sbytes = uap->sbytes;
|
|
args.flags = uap->flags;
|
|
|
|
return (do_sendfile(td, &args, 1));
|
|
}
|
|
#endif /* COMPAT_FREEBSD4 */
|
|
|
|
static int
|
|
do_sendfile(struct thread *td, struct sendfile_args *uap, int compat)
|
|
{
|
|
struct vnode *vp;
|
|
struct vm_object *obj;
|
|
struct socket *so = NULL;
|
|
struct mbuf *m, *m_header = NULL;
|
|
struct sf_buf *sf;
|
|
struct vm_page *pg;
|
|
struct writev_args nuap;
|
|
struct sf_hdtr hdtr;
|
|
struct uio *hdr_uio = NULL;
|
|
off_t off, xfsize, hdtr_size, sbytes = 0;
|
|
int error, headersize = 0, headersent = 0;
|
|
|
|
mtx_lock(&Giant);
|
|
|
|
hdtr_size = 0;
|
|
|
|
/*
|
|
* The descriptor must be a regular file and have a backing VM object.
|
|
*/
|
|
if ((error = fgetvp_read(td, uap->fd, &vp)) != 0)
|
|
goto done;
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
|
|
obj = vp->v_object;
|
|
VOP_UNLOCK(vp, 0, td);
|
|
if (obj == NULL) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
if ((error = fgetsock(td, uap->s, &so, NULL)) != 0)
|
|
goto done;
|
|
if (so->so_type != SOCK_STREAM) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
if ((so->so_state & SS_ISCONNECTED) == 0) {
|
|
error = ENOTCONN;
|
|
goto done;
|
|
}
|
|
if (uap->offset < 0) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
#ifdef MAC
|
|
SOCK_LOCK(so);
|
|
error = mac_check_socket_send(td->td_ucred, so);
|
|
SOCK_UNLOCK(so);
|
|
if (error)
|
|
goto done;
|
|
#endif
|
|
|
|
/*
|
|
* If specified, get the pointer to the sf_hdtr struct for
|
|
* any headers/trailers.
|
|
*/
|
|
if (uap->hdtr != NULL) {
|
|
error = copyin(uap->hdtr, &hdtr, sizeof(hdtr));
|
|
if (error)
|
|
goto done;
|
|
/*
|
|
* Send any headers.
|
|
*/
|
|
if (hdtr.headers != NULL) {
|
|
error = copyinuio(hdtr.headers, hdtr.hdr_cnt, &hdr_uio);
|
|
if (error)
|
|
goto done;
|
|
hdr_uio->uio_td = td;
|
|
hdr_uio->uio_rw = UIO_WRITE;
|
|
if (hdr_uio->uio_resid > 0) {
|
|
m_header = m_uiotombuf(hdr_uio, M_DONTWAIT, 0, 0);
|
|
if (m_header == NULL)
|
|
goto done;
|
|
headersize = m_header->m_pkthdr.len;
|
|
if (compat)
|
|
sbytes += headersize;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Protect against multiple writers to the socket.
|
|
*/
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
(void) sblock(&so->so_snd, M_WAITOK);
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
|
|
/*
|
|
* Loop through the pages in the file, starting with the requested
|
|
* offset. Get a file page (do I/O if necessary), map the file page
|
|
* into an sf_buf, attach an mbuf header to the sf_buf, and queue
|
|
* it on the socket.
|
|
*/
|
|
for (off = uap->offset; ; off += xfsize, sbytes += xfsize) {
|
|
vm_pindex_t pindex;
|
|
vm_offset_t pgoff;
|
|
|
|
pindex = OFF_TO_IDX(off);
|
|
VM_OBJECT_LOCK(obj);
|
|
retry_lookup:
|
|
/*
|
|
* Calculate the amount to transfer. Not to exceed a page,
|
|
* the EOF, or the passed in nbytes.
|
|
*/
|
|
xfsize = obj->un_pager.vnp.vnp_size - off;
|
|
VM_OBJECT_UNLOCK(obj);
|
|
if (xfsize > PAGE_SIZE)
|
|
xfsize = PAGE_SIZE;
|
|
pgoff = (vm_offset_t)(off & PAGE_MASK);
|
|
if (PAGE_SIZE - pgoff < xfsize)
|
|
xfsize = PAGE_SIZE - pgoff;
|
|
if (uap->nbytes && xfsize > (uap->nbytes - sbytes))
|
|
xfsize = uap->nbytes - sbytes;
|
|
if (xfsize <= 0) {
|
|
if (m_header != NULL) {
|
|
m = m_header;
|
|
m_header = NULL;
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
goto retry_space;
|
|
} else
|
|
break;
|
|
}
|
|
/*
|
|
* Optimize the non-blocking case by looking at the socket space
|
|
* before going to the extra work of constituting the sf_buf.
|
|
*/
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
if ((so->so_state & SS_NBIO) && sbspace(&so->so_snd) <= 0) {
|
|
if (so->so_snd.sb_state & SBS_CANTSENDMORE)
|
|
error = EPIPE;
|
|
else
|
|
error = EAGAIN;
|
|
sbunlock(&so->so_snd);
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto done;
|
|
}
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
VM_OBJECT_LOCK(obj);
|
|
/*
|
|
* Attempt to look up the page.
|
|
*
|
|
* Allocate if not found
|
|
*
|
|
* Wait and loop if busy.
|
|
*/
|
|
pg = vm_page_lookup(obj, pindex);
|
|
|
|
if (pg == NULL) {
|
|
pg = vm_page_alloc(obj, pindex, VM_ALLOC_NOBUSY |
|
|
VM_ALLOC_NORMAL | VM_ALLOC_WIRED);
|
|
if (pg == NULL) {
|
|
VM_OBJECT_UNLOCK(obj);
|
|
VM_WAIT;
|
|
VM_OBJECT_LOCK(obj);
|
|
goto retry_lookup;
|
|
}
|
|
vm_page_lock_queues();
|
|
} else {
|
|
vm_page_lock_queues();
|
|
if (vm_page_sleep_if_busy(pg, TRUE, "sfpbsy"))
|
|
goto retry_lookup;
|
|
/*
|
|
* Wire the page so it does not get ripped out from
|
|
* under us.
|
|
*/
|
|
vm_page_wire(pg);
|
|
}
|
|
|
|
/*
|
|
* If page is not valid for what we need, initiate I/O
|
|
*/
|
|
|
|
if (pg->valid && vm_page_is_valid(pg, pgoff, xfsize)) {
|
|
VM_OBJECT_UNLOCK(obj);
|
|
} else if (uap->flags & SF_NODISKIO) {
|
|
error = EBUSY;
|
|
} else {
|
|
int bsize, resid;
|
|
|
|
/*
|
|
* Ensure that our page is still around when the I/O
|
|
* completes.
|
|
*/
|
|
vm_page_io_start(pg);
|
|
vm_page_unlock_queues();
|
|
VM_OBJECT_UNLOCK(obj);
|
|
|
|
/*
|
|
* Get the page from backing store.
|
|
*/
|
|
bsize = vp->v_mount->mnt_stat.f_iosize;
|
|
vn_lock(vp, LK_SHARED | LK_RETRY, td);
|
|
/*
|
|
* XXXMAC: Because we don't have fp->f_cred here,
|
|
* we pass in NOCRED. This is probably wrong, but
|
|
* is consistent with our original implementation.
|
|
*/
|
|
error = vn_rdwr(UIO_READ, vp, NULL, MAXBSIZE,
|
|
trunc_page(off), UIO_NOCOPY, IO_NODELOCKED |
|
|
IO_VMIO | ((MAXBSIZE / bsize) << IO_SEQSHIFT),
|
|
td->td_ucred, NOCRED, &resid, td);
|
|
VOP_UNLOCK(vp, 0, td);
|
|
VM_OBJECT_LOCK(obj);
|
|
vm_page_lock_queues();
|
|
vm_page_io_finish(pg);
|
|
if (!error)
|
|
VM_OBJECT_UNLOCK(obj);
|
|
mbstat.sf_iocnt++;
|
|
}
|
|
|
|
if (error) {
|
|
vm_page_unwire(pg, 0);
|
|
/*
|
|
* See if anyone else might know about this page.
|
|
* If not and it is not valid, then free it.
|
|
*/
|
|
if (pg->wire_count == 0 && pg->valid == 0 &&
|
|
pg->busy == 0 && !(pg->flags & PG_BUSY) &&
|
|
pg->hold_count == 0) {
|
|
vm_page_free(pg);
|
|
}
|
|
vm_page_unlock_queues();
|
|
VM_OBJECT_UNLOCK(obj);
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
sbunlock(&so->so_snd);
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto done;
|
|
}
|
|
vm_page_unlock_queues();
|
|
|
|
/*
|
|
* Get a sendfile buf. We usually wait as long as necessary,
|
|
* but this wait can be interrupted.
|
|
*/
|
|
if ((sf = sf_buf_alloc(pg, SFB_CATCH)) == NULL) {
|
|
mbstat.sf_allocfail++;
|
|
vm_page_lock_queues();
|
|
vm_page_unwire(pg, 0);
|
|
if (pg->wire_count == 0 && pg->object == NULL)
|
|
vm_page_free(pg);
|
|
vm_page_unlock_queues();
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
sbunlock(&so->so_snd);
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
error = EINTR;
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Get an mbuf header and set it up as having external storage.
|
|
*/
|
|
if (m_header)
|
|
MGET(m, M_TRYWAIT, MT_DATA);
|
|
else
|
|
MGETHDR(m, M_TRYWAIT, MT_DATA);
|
|
if (m == NULL) {
|
|
error = ENOBUFS;
|
|
sf_buf_mext((void *)sf_buf_kva(sf), sf);
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
sbunlock(&so->so_snd);
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto done;
|
|
}
|
|
/*
|
|
* Setup external storage for mbuf.
|
|
*/
|
|
MEXTADD(m, sf_buf_kva(sf), PAGE_SIZE, sf_buf_mext, sf, M_RDONLY,
|
|
EXT_SFBUF);
|
|
m->m_data = (char *)sf_buf_kva(sf) + pgoff;
|
|
m->m_pkthdr.len = m->m_len = xfsize;
|
|
|
|
if (m_header) {
|
|
m_cat(m_header, m);
|
|
m = m_header;
|
|
m_header = NULL;
|
|
m_fixhdr(m);
|
|
}
|
|
|
|
/*
|
|
* Add the buffer to the socket buffer chain.
|
|
*/
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
retry_space:
|
|
/*
|
|
* Make sure that the socket is still able to take more data.
|
|
* CANTSENDMORE being true usually means that the connection
|
|
* was closed. so_error is true when an error was sensed after
|
|
* a previous send.
|
|
* The state is checked after the page mapping and buffer
|
|
* allocation above since those operations may block and make
|
|
* any socket checks stale. From this point forward, nothing
|
|
* blocks before the pru_send (or more accurately, any blocking
|
|
* results in a loop back to here to re-check).
|
|
*/
|
|
SOCKBUF_LOCK_ASSERT(&so->so_snd);
|
|
if ((so->so_snd.sb_state & SBS_CANTSENDMORE) || so->so_error) {
|
|
if (so->so_snd.sb_state & SBS_CANTSENDMORE) {
|
|
error = EPIPE;
|
|
} else {
|
|
error = so->so_error;
|
|
so->so_error = 0;
|
|
}
|
|
m_freem(m);
|
|
sbunlock(&so->so_snd);
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto done;
|
|
}
|
|
/*
|
|
* Wait for socket space to become available. We do this just
|
|
* after checking the connection state above in order to avoid
|
|
* a race condition with sbwait().
|
|
*/
|
|
if (sbspace(&so->so_snd) < so->so_snd.sb_lowat) {
|
|
if (so->so_state & SS_NBIO) {
|
|
m_freem(m);
|
|
sbunlock(&so->so_snd);
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
error = EAGAIN;
|
|
goto done;
|
|
}
|
|
error = sbwait(&so->so_snd);
|
|
/*
|
|
* An error from sbwait usually indicates that we've
|
|
* been interrupted by a signal. If we've sent anything
|
|
* then return bytes sent, otherwise return the error.
|
|
*/
|
|
if (error) {
|
|
m_freem(m);
|
|
sbunlock(&so->so_snd);
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto done;
|
|
}
|
|
goto retry_space;
|
|
}
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
error = (*so->so_proto->pr_usrreqs->pru_send)(so, 0, m, 0, 0, td);
|
|
if (error) {
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
sbunlock(&so->so_snd);
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
goto done;
|
|
}
|
|
headersent = 1;
|
|
}
|
|
SOCKBUF_LOCK(&so->so_snd);
|
|
sbunlock(&so->so_snd);
|
|
SOCKBUF_UNLOCK(&so->so_snd);
|
|
|
|
/*
|
|
* Send trailers. Wimp out and use writev(2).
|
|
*/
|
|
if (uap->hdtr != NULL && hdtr.trailers != NULL) {
|
|
nuap.fd = uap->s;
|
|
nuap.iovp = hdtr.trailers;
|
|
nuap.iovcnt = hdtr.trl_cnt;
|
|
error = writev(td, &nuap);
|
|
if (error)
|
|
goto done;
|
|
if (compat)
|
|
sbytes += td->td_retval[0];
|
|
else
|
|
hdtr_size += td->td_retval[0];
|
|
}
|
|
|
|
done:
|
|
if (headersent) {
|
|
if (!compat)
|
|
hdtr_size += headersize;
|
|
} else {
|
|
if (compat)
|
|
sbytes -= headersize;
|
|
}
|
|
/*
|
|
* If there was no error we have to clear td->td_retval[0]
|
|
* because it may have been set by writev.
|
|
*/
|
|
if (error == 0) {
|
|
td->td_retval[0] = 0;
|
|
}
|
|
if (uap->sbytes != NULL) {
|
|
if (!compat)
|
|
sbytes += hdtr_size;
|
|
copyout(&sbytes, uap->sbytes, sizeof(off_t));
|
|
}
|
|
if (vp)
|
|
vrele(vp);
|
|
if (so)
|
|
fputsock(so);
|
|
if (hdr_uio != NULL)
|
|
free(hdr_uio, M_IOV);
|
|
if (m_header)
|
|
m_freem(m_header);
|
|
|
|
mtx_unlock(&Giant);
|
|
|
|
if (error == ERESTART)
|
|
error = EINTR;
|
|
|
|
return (error);
|
|
}
|