598 lines
14 KiB
C
598 lines
14 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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* 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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_capsicum.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_sctp.h"
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#include "opt_compat.h"
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#include "opt_ktrace.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/capsicum.h>
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#include <sys/kernel.h>
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#include <sys/lock.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/jail.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/sysent.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/syscall.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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#ifdef COMPAT_FREEBSD32
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#include <compat/freebsd32/freebsd32_util.h>
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#endif
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#include <net/vnet.h>
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#include <security/audit/audit.h>
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#include <security/mac/mac_framework.h>
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#include <netinet/sctp.h>
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#include <netinet/sctp_peeloff.h>
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static struct syscall_helper_data sctp_syscalls[] = {
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SYSCALL_INIT_HELPER(sctp_peeloff),
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SYSCALL_INIT_HELPER(sctp_generic_sendmsg),
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SYSCALL_INIT_HELPER(sctp_generic_sendmsg_iov),
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SYSCALL_INIT_HELPER(sctp_generic_recvmsg),
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SYSCALL_INIT_LAST
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};
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static void
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sctp_syscalls_init(void *unused __unused)
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{
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int error;
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error = syscall_helper_register(sctp_syscalls, SY_THR_STATIC);
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KASSERT((error == 0),
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("%s: syscall_helper_register failed for sctp syscalls", __func__));
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#ifdef COMPAT_FREEBSD32
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error = syscall32_helper_register(sctp_syscalls, SY_THR_STATIC);
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KASSERT((error == 0),
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("%s: syscall32_helper_register failed for sctp syscalls",
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__func__));
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#endif
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}
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SYSINIT(sctp_syscalls, SI_SUB_SYSCALLS, SI_ORDER_ANY, sctp_syscalls_init, NULL);
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/*
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* SCTP syscalls.
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* Functionality only compiled in if SCTP is defined in the kernel Makefile,
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* otherwise all return EOPNOTSUPP.
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* XXX: We should make this loadable one day.
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*/
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int
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sys_sctp_peeloff(td, uap)
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struct thread *td;
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struct sctp_peeloff_args /* {
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int sd;
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caddr_t name;
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} */ *uap;
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{
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#if (defined(INET) || defined(INET6)) && defined(SCTP)
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struct file *headfp, *nfp = NULL;
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struct socket *head, *so;
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cap_rights_t rights;
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u_int fflag;
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int error, fd;
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AUDIT_ARG_FD(uap->sd);
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error = getsock_cap(td, uap->sd, cap_rights_init(&rights, CAP_PEELOFF),
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&headfp, &fflag, NULL);
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if (error != 0)
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goto done2;
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head = headfp->f_data;
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if (head->so_proto->pr_protocol != IPPROTO_SCTP) {
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error = EOPNOTSUPP;
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goto done;
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}
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error = sctp_can_peel_off(head, (sctp_assoc_t)uap->name);
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if (error != 0)
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goto done;
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/*
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* At this point we know we do have a assoc to pull
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* we proceed to get the fd setup. This may block
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* but that is ok.
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*/
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error = falloc(td, &nfp, &fd, 0);
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if (error != 0)
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goto done;
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td->td_retval[0] = fd;
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CURVNET_SET(head->so_vnet);
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so = sonewconn(head, SS_ISCONNECTED);
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if (so == NULL) {
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error = ENOMEM;
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goto noconnection;
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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);
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soref(so); /* file descriptor reference */
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SOCK_UNLOCK(so);
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ACCEPT_LOCK();
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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_state &= ~SS_NOFDREF;
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so->so_qstate &= ~SQ_COMP;
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so->so_head = NULL;
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ACCEPT_UNLOCK();
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finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
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error = sctp_do_peeloff(head, so, (sctp_assoc_t)uap->name);
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if (error != 0)
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goto noconnection;
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if (head->so_sigio != NULL)
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fsetown(fgetown(&head->so_sigio), &so->so_sigio);
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noconnection:
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/*
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* close the new descriptor, assuming someone hasn't ripped it
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* out from under us.
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*/
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if (error != 0)
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fdclose(td, nfp, fd);
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/*
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* Release explicitly held references before returning.
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*/
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CURVNET_RESTORE();
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done:
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if (nfp != NULL)
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fdrop(nfp, td);
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fdrop(headfp, td);
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done2:
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return (error);
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#else /* SCTP */
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return (EOPNOTSUPP);
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#endif /* SCTP */
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}
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int
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sys_sctp_generic_sendmsg (td, uap)
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struct thread *td;
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struct sctp_generic_sendmsg_args /* {
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int sd,
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caddr_t msg,
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int mlen,
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caddr_t to,
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__socklen_t tolen,
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struct sctp_sndrcvinfo *sinfo,
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int flags
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} */ *uap;
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{
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#if (defined(INET) || defined(INET6)) && defined(SCTP)
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struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
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struct socket *so;
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struct file *fp = NULL;
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struct sockaddr *to = NULL;
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#ifdef KTRACE
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struct uio *ktruio = NULL;
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#endif
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struct uio auio;
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struct iovec iov[1];
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cap_rights_t rights;
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int error = 0, len;
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if (uap->sinfo != NULL) {
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error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
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if (error != 0)
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return (error);
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u_sinfo = &sinfo;
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}
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cap_rights_init(&rights, CAP_SEND);
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if (uap->tolen != 0) {
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error = getsockaddr(&to, uap->to, uap->tolen);
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if (error != 0) {
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to = NULL;
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goto sctp_bad2;
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}
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cap_rights_set(&rights, CAP_CONNECT);
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}
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AUDIT_ARG_FD(uap->sd);
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error = getsock_cap(td, uap->sd, &rights, &fp, NULL, NULL);
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if (error != 0)
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goto sctp_bad;
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#ifdef KTRACE
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if (to && (KTRPOINT(td, KTR_STRUCT)))
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ktrsockaddr(to);
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#endif
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iov[0].iov_base = uap->msg;
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iov[0].iov_len = uap->mlen;
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so = (struct socket *)fp->f_data;
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if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
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error = EOPNOTSUPP;
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goto sctp_bad;
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}
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#ifdef MAC
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error = mac_socket_check_send(td->td_ucred, so);
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if (error != 0)
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goto sctp_bad;
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#endif /* MAC */
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auio.uio_iov = iov;
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auio.uio_iovcnt = 1;
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auio.uio_segflg = UIO_USERSPACE;
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auio.uio_rw = UIO_WRITE;
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auio.uio_td = td;
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auio.uio_offset = 0; /* XXX */
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auio.uio_resid = 0;
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#ifdef KTRACE
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if (KTRPOINT(td, KTR_GENIO))
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ktruio = cloneuio(&auio);
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#endif /* KTRACE */
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len = auio.uio_resid = uap->mlen;
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CURVNET_SET(so->so_vnet);
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error = sctp_lower_sosend(so, to, &auio, (struct mbuf *)NULL,
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(struct mbuf *)NULL, uap->flags, u_sinfo, td);
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CURVNET_RESTORE();
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if (error != 0) {
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if (auio.uio_resid != len && (error == ERESTART ||
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error == EINTR || error == EWOULDBLOCK))
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error = 0;
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/* Generation of SIGPIPE can be controlled per socket. */
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if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
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!(uap->flags & MSG_NOSIGNAL)) {
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PROC_LOCK(td->td_proc);
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tdsignal(td, SIGPIPE);
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PROC_UNLOCK(td->td_proc);
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}
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}
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if (error == 0)
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td->td_retval[0] = len - auio.uio_resid;
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#ifdef KTRACE
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if (ktruio != NULL) {
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ktruio->uio_resid = td->td_retval[0];
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ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
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}
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#endif /* KTRACE */
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sctp_bad:
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if (fp != NULL)
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fdrop(fp, td);
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sctp_bad2:
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free(to, M_SONAME);
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return (error);
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#else /* SCTP */
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return (EOPNOTSUPP);
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#endif /* SCTP */
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}
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int
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sys_sctp_generic_sendmsg_iov(td, uap)
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struct thread *td;
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struct sctp_generic_sendmsg_iov_args /* {
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int sd,
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struct iovec *iov,
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int iovlen,
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caddr_t to,
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__socklen_t tolen,
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struct sctp_sndrcvinfo *sinfo,
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int flags
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} */ *uap;
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{
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#if (defined(INET) || defined(INET6)) && defined(SCTP)
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struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
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struct socket *so;
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struct file *fp = NULL;
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struct sockaddr *to = NULL;
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#ifdef KTRACE
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struct uio *ktruio = NULL;
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#endif
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struct uio auio;
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struct iovec *iov, *tiov;
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cap_rights_t rights;
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ssize_t len;
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int error, i;
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if (uap->sinfo != NULL) {
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error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
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if (error != 0)
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return (error);
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u_sinfo = &sinfo;
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}
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cap_rights_init(&rights, CAP_SEND);
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if (uap->tolen != 0) {
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error = getsockaddr(&to, uap->to, uap->tolen);
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if (error != 0) {
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to = NULL;
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goto sctp_bad2;
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}
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cap_rights_set(&rights, CAP_CONNECT);
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}
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AUDIT_ARG_FD(uap->sd);
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error = getsock_cap(td, uap->sd, &rights, &fp, NULL, NULL);
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if (error != 0)
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goto sctp_bad1;
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#ifdef COMPAT_FREEBSD32
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if (SV_CURPROC_FLAG(SV_ILP32))
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error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
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uap->iovlen, &iov, EMSGSIZE);
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else
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#endif
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error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
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if (error != 0)
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goto sctp_bad1;
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#ifdef KTRACE
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if (to && (KTRPOINT(td, KTR_STRUCT)))
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ktrsockaddr(to);
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#endif
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so = (struct socket *)fp->f_data;
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if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
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error = EOPNOTSUPP;
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goto sctp_bad;
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}
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#ifdef MAC
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error = mac_socket_check_send(td->td_ucred, so);
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if (error != 0)
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goto sctp_bad;
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#endif /* MAC */
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auio.uio_iov = iov;
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auio.uio_iovcnt = uap->iovlen;
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auio.uio_segflg = UIO_USERSPACE;
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auio.uio_rw = UIO_WRITE;
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auio.uio_td = td;
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auio.uio_offset = 0; /* XXX */
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auio.uio_resid = 0;
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tiov = iov;
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for (i = 0; i <uap->iovlen; i++, tiov++) {
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if ((auio.uio_resid += tiov->iov_len) < 0) {
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error = EINVAL;
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goto sctp_bad;
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}
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}
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#ifdef KTRACE
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if (KTRPOINT(td, KTR_GENIO))
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ktruio = cloneuio(&auio);
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#endif /* KTRACE */
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len = auio.uio_resid;
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CURVNET_SET(so->so_vnet);
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error = sctp_lower_sosend(so, to, &auio,
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(struct mbuf *)NULL, (struct mbuf *)NULL,
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uap->flags, u_sinfo, td);
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CURVNET_RESTORE();
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if (error != 0) {
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if (auio.uio_resid != len && (error == ERESTART ||
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error == EINTR || error == EWOULDBLOCK))
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error = 0;
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/* Generation of SIGPIPE can be controlled per socket */
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if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
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!(uap->flags & MSG_NOSIGNAL)) {
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PROC_LOCK(td->td_proc);
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tdsignal(td, SIGPIPE);
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PROC_UNLOCK(td->td_proc);
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}
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}
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if (error == 0)
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td->td_retval[0] = len - auio.uio_resid;
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#ifdef KTRACE
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if (ktruio != NULL) {
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ktruio->uio_resid = td->td_retval[0];
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ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
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}
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#endif /* KTRACE */
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sctp_bad:
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free(iov, M_IOV);
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sctp_bad1:
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if (fp != NULL)
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fdrop(fp, td);
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sctp_bad2:
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free(to, M_SONAME);
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return (error);
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#else /* SCTP */
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return (EOPNOTSUPP);
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#endif /* SCTP */
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}
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int
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sys_sctp_generic_recvmsg(td, uap)
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struct thread *td;
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struct sctp_generic_recvmsg_args /* {
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int sd,
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struct iovec *iov,
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int iovlen,
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struct sockaddr *from,
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__socklen_t *fromlenaddr,
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struct sctp_sndrcvinfo *sinfo,
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int *msg_flags
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} */ *uap;
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{
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#if (defined(INET) || defined(INET6)) && defined(SCTP)
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uint8_t sockbufstore[256];
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struct uio auio;
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struct iovec *iov, *tiov;
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struct sctp_sndrcvinfo sinfo;
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struct socket *so;
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struct file *fp = NULL;
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struct sockaddr *fromsa;
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cap_rights_t rights;
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#ifdef KTRACE
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struct uio *ktruio = NULL;
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#endif
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ssize_t len;
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int error, fromlen, i, msg_flags;
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AUDIT_ARG_FD(uap->sd);
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error = getsock_cap(td, uap->sd, cap_rights_init(&rights, CAP_RECV),
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&fp, NULL, NULL);
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if (error != 0)
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return (error);
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#ifdef COMPAT_FREEBSD32
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if (SV_CURPROC_FLAG(SV_ILP32))
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error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
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uap->iovlen, &iov, EMSGSIZE);
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else
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#endif
|
|
error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
|
|
if (error != 0)
|
|
goto out1;
|
|
|
|
so = fp->f_data;
|
|
if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
|
|
error = EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
#ifdef MAC
|
|
error = mac_socket_check_receive(td->td_ucred, so);
|
|
if (error != 0)
|
|
goto out;
|
|
#endif /* MAC */
|
|
|
|
if (uap->fromlenaddr != NULL) {
|
|
error = copyin(uap->fromlenaddr, &fromlen, sizeof (fromlen));
|
|
if (error != 0)
|
|
goto out;
|
|
} else {
|
|
fromlen = 0;
|
|
}
|
|
if (uap->msg_flags) {
|
|
error = copyin(uap->msg_flags, &msg_flags, sizeof (int));
|
|
if (error != 0)
|
|
goto out;
|
|
} else {
|
|
msg_flags = 0;
|
|
}
|
|
auio.uio_iov = iov;
|
|
auio.uio_iovcnt = uap->iovlen;
|
|
auio.uio_segflg = UIO_USERSPACE;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_td = td;
|
|
auio.uio_offset = 0; /* XXX */
|
|
auio.uio_resid = 0;
|
|
tiov = iov;
|
|
for (i = 0; i <uap->iovlen; i++, tiov++) {
|
|
if ((auio.uio_resid += tiov->iov_len) < 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
len = auio.uio_resid;
|
|
fromsa = (struct sockaddr *)sockbufstore;
|
|
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_GENIO))
|
|
ktruio = cloneuio(&auio);
|
|
#endif /* KTRACE */
|
|
memset(&sinfo, 0, sizeof(struct sctp_sndrcvinfo));
|
|
CURVNET_SET(so->so_vnet);
|
|
error = sctp_sorecvmsg(so, &auio, (struct mbuf **)NULL,
|
|
fromsa, fromlen, &msg_flags,
|
|
(struct sctp_sndrcvinfo *)&sinfo, 1);
|
|
CURVNET_RESTORE();
|
|
if (error != 0) {
|
|
if (auio.uio_resid != len && (error == ERESTART ||
|
|
error == EINTR || error == EWOULDBLOCK))
|
|
error = 0;
|
|
} else {
|
|
if (uap->sinfo)
|
|
error = copyout(&sinfo, uap->sinfo, sizeof (sinfo));
|
|
}
|
|
#ifdef KTRACE
|
|
if (ktruio != NULL) {
|
|
ktruio->uio_resid = len - auio.uio_resid;
|
|
ktrgenio(uap->sd, UIO_READ, ktruio, error);
|
|
}
|
|
#endif /* KTRACE */
|
|
if (error != 0)
|
|
goto out;
|
|
td->td_retval[0] = len - auio.uio_resid;
|
|
|
|
if (fromlen && uap->from) {
|
|
len = fromlen;
|
|
if (len <= 0 || fromsa == NULL)
|
|
len = 0;
|
|
else {
|
|
len = MIN(len, fromsa->sa_len);
|
|
error = copyout(fromsa, uap->from, (size_t)len);
|
|
if (error != 0)
|
|
goto out;
|
|
}
|
|
error = copyout(&len, uap->fromlenaddr, sizeof (socklen_t));
|
|
if (error != 0)
|
|
goto out;
|
|
}
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_STRUCT))
|
|
ktrsockaddr(fromsa);
|
|
#endif
|
|
if (uap->msg_flags) {
|
|
error = copyout(&msg_flags, uap->msg_flags, sizeof (int));
|
|
if (error != 0)
|
|
goto out;
|
|
}
|
|
out:
|
|
free(iov, M_IOV);
|
|
out1:
|
|
if (fp != NULL)
|
|
fdrop(fp, td);
|
|
|
|
return (error);
|
|
#else /* SCTP */
|
|
return (EOPNOTSUPP);
|
|
#endif /* SCTP */
|
|
}
|