2 * Copyright (c) 1982, 1986, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
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13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
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31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include "opt_capsicum.h"
36 #include "opt_inet6.h"
38 #include "opt_compat.h"
39 #include "opt_ktrace.h"
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/capsicum.h>
44 #include <sys/kernel.h>
46 #include <sys/mutex.h>
47 #include <sys/sysproto.h>
48 #include <sys/malloc.h>
49 #include <sys/filedesc.h>
50 #include <sys/event.h>
52 #include <sys/fcntl.h>
54 #include <sys/filio.h>
56 #include <sys/mount.h>
58 #include <sys/protosw.h>
59 #include <sys/sf_buf.h>
60 #include <sys/sysent.h>
61 #include <sys/socket.h>
62 #include <sys/socketvar.h>
63 #include <sys/signalvar.h>
64 #include <sys/syscall.h>
65 #include <sys/syscallsubr.h>
66 #include <sys/sysctl.h>
68 #include <sys/vnode.h>
70 #include <sys/ktrace.h>
72 #ifdef COMPAT_FREEBSD32
73 #include <compat/freebsd32/freebsd32_util.h>
78 #include <security/audit/audit.h>
79 #include <security/mac/mac_framework.h>
81 #include <netinet/sctp.h>
82 #include <netinet/sctp_peeloff.h>
84 static struct syscall_helper_data sctp_syscalls[] = {
85 SYSCALL_INIT_HELPER_F(sctp_peeloff, SYF_CAPENABLED),
86 SYSCALL_INIT_HELPER_F(sctp_generic_sendmsg, SYF_CAPENABLED),
87 SYSCALL_INIT_HELPER_F(sctp_generic_sendmsg_iov, SYF_CAPENABLED),
88 SYSCALL_INIT_HELPER_F(sctp_generic_recvmsg, SYF_CAPENABLED),
93 sctp_syscalls_init(void *unused __unused)
97 error = syscall_helper_register(sctp_syscalls, SY_THR_STATIC);
99 ("%s: syscall_helper_register failed for sctp syscalls", __func__));
100 #ifdef COMPAT_FREEBSD32
101 error = syscall32_helper_register(sctp_syscalls, SY_THR_STATIC);
102 KASSERT((error == 0),
103 ("%s: syscall32_helper_register failed for sctp syscalls",
107 SYSINIT(sctp_syscalls, SI_SUB_SYSCALLS, SI_ORDER_ANY, sctp_syscalls_init, NULL);
111 * Functionality only compiled in if SCTP is defined in the kernel Makefile,
112 * otherwise all return EOPNOTSUPP.
113 * XXX: We should make this loadable one day.
116 sys_sctp_peeloff(td, uap)
118 struct sctp_peeloff_args /* {
123 #if (defined(INET) || defined(INET6)) && defined(SCTP)
124 struct file *headfp, *nfp = NULL;
125 struct socket *head, *so;
130 AUDIT_ARG_FD(uap->sd);
131 error = getsock_cap(td, uap->sd, cap_rights_init(&rights, CAP_PEELOFF),
132 &headfp, &fflag, NULL);
135 head = headfp->f_data;
136 if (head->so_proto->pr_protocol != IPPROTO_SCTP) {
140 error = sctp_can_peel_off(head, (sctp_assoc_t)uap->name);
144 * At this point we know we do have a assoc to pull
145 * we proceed to get the fd setup. This may block
149 error = falloc(td, &nfp, &fd, 0);
152 td->td_retval[0] = fd;
154 CURVNET_SET(head->so_vnet);
155 so = sonewconn(head, SS_ISCONNECTED);
161 * Before changing the flags on the socket, we have to bump the
162 * reference count. Otherwise, if the protocol calls sofree(),
163 * the socket will be released due to a zero refcount.
166 soref(so); /* file descriptor reference */
171 TAILQ_REMOVE(&head->so_comp, so, so_list);
173 so->so_state |= (head->so_state & SS_NBIO);
174 so->so_state &= ~SS_NOFDREF;
175 so->so_qstate &= ~SQ_COMP;
178 finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
179 error = sctp_do_peeloff(head, so, (sctp_assoc_t)uap->name);
182 if (head->so_sigio != NULL)
183 fsetown(fgetown(&head->so_sigio), &so->so_sigio);
187 * close the new descriptor, assuming someone hasn't ripped it
191 fdclose(td, nfp, fd);
194 * Release explicitly held references before returning.
209 sys_sctp_generic_sendmsg (td, uap)
211 struct sctp_generic_sendmsg_args /* {
217 struct sctp_sndrcvinfo *sinfo,
221 #if (defined(INET) || defined(INET6)) && defined(SCTP)
222 struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
224 struct file *fp = NULL;
225 struct sockaddr *to = NULL;
227 struct uio *ktruio = NULL;
234 if (uap->sinfo != NULL) {
235 error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
241 cap_rights_init(&rights, CAP_SEND);
242 if (uap->tolen != 0) {
243 error = getsockaddr(&to, uap->to, uap->tolen);
248 cap_rights_set(&rights, CAP_CONNECT);
251 AUDIT_ARG_FD(uap->sd);
252 error = getsock_cap(td, uap->sd, &rights, &fp, NULL, NULL);
256 if (to && (KTRPOINT(td, KTR_STRUCT)))
260 iov[0].iov_base = uap->msg;
261 iov[0].iov_len = uap->mlen;
263 so = (struct socket *)fp->f_data;
264 if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
269 error = mac_socket_check_send(td->td_ucred, so);
276 auio.uio_segflg = UIO_USERSPACE;
277 auio.uio_rw = UIO_WRITE;
279 auio.uio_offset = 0; /* XXX */
282 if (KTRPOINT(td, KTR_GENIO))
283 ktruio = cloneuio(&auio);
285 len = auio.uio_resid = uap->mlen;
286 CURVNET_SET(so->so_vnet);
287 error = sctp_lower_sosend(so, to, &auio, (struct mbuf *)NULL,
288 (struct mbuf *)NULL, uap->flags, u_sinfo, td);
291 if (auio.uio_resid != len && (error == ERESTART ||
292 error == EINTR || error == EWOULDBLOCK))
294 /* Generation of SIGPIPE can be controlled per socket. */
295 if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
296 !(uap->flags & MSG_NOSIGNAL)) {
297 PROC_LOCK(td->td_proc);
298 tdsignal(td, SIGPIPE);
299 PROC_UNLOCK(td->td_proc);
303 td->td_retval[0] = len - auio.uio_resid;
305 if (ktruio != NULL) {
306 ktruio->uio_resid = td->td_retval[0];
307 ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
322 sys_sctp_generic_sendmsg_iov(td, uap)
324 struct sctp_generic_sendmsg_iov_args /* {
330 struct sctp_sndrcvinfo *sinfo,
334 #if (defined(INET) || defined(INET6)) && defined(SCTP)
335 struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
337 struct file *fp = NULL;
338 struct sockaddr *to = NULL;
340 struct uio *ktruio = NULL;
343 struct iovec *iov, *tiov;
348 if (uap->sinfo != NULL) {
349 error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
354 cap_rights_init(&rights, CAP_SEND);
355 if (uap->tolen != 0) {
356 error = getsockaddr(&to, uap->to, uap->tolen);
361 cap_rights_set(&rights, CAP_CONNECT);
364 AUDIT_ARG_FD(uap->sd);
365 error = getsock_cap(td, uap->sd, &rights, &fp, NULL, NULL);
369 #ifdef COMPAT_FREEBSD32
370 if (SV_CURPROC_FLAG(SV_ILP32))
371 error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
372 uap->iovlen, &iov, EMSGSIZE);
375 error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
379 if (to && (KTRPOINT(td, KTR_STRUCT)))
383 so = (struct socket *)fp->f_data;
384 if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
389 error = mac_socket_check_send(td->td_ucred, so);
395 auio.uio_iovcnt = uap->iovlen;
396 auio.uio_segflg = UIO_USERSPACE;
397 auio.uio_rw = UIO_WRITE;
399 auio.uio_offset = 0; /* XXX */
402 for (i = 0; i <uap->iovlen; i++, tiov++) {
403 if ((auio.uio_resid += tiov->iov_len) < 0) {
409 if (KTRPOINT(td, KTR_GENIO))
410 ktruio = cloneuio(&auio);
412 len = auio.uio_resid;
413 CURVNET_SET(so->so_vnet);
414 error = sctp_lower_sosend(so, to, &auio,
415 (struct mbuf *)NULL, (struct mbuf *)NULL,
416 uap->flags, u_sinfo, td);
419 if (auio.uio_resid != len && (error == ERESTART ||
420 error == EINTR || error == EWOULDBLOCK))
422 /* Generation of SIGPIPE can be controlled per socket */
423 if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
424 !(uap->flags & MSG_NOSIGNAL)) {
425 PROC_LOCK(td->td_proc);
426 tdsignal(td, SIGPIPE);
427 PROC_UNLOCK(td->td_proc);
431 td->td_retval[0] = len - auio.uio_resid;
433 if (ktruio != NULL) {
434 ktruio->uio_resid = td->td_retval[0];
435 ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
452 sys_sctp_generic_recvmsg(td, uap)
454 struct sctp_generic_recvmsg_args /* {
458 struct sockaddr *from,
459 __socklen_t *fromlenaddr,
460 struct sctp_sndrcvinfo *sinfo,
464 #if (defined(INET) || defined(INET6)) && defined(SCTP)
465 uint8_t sockbufstore[256];
467 struct iovec *iov, *tiov;
468 struct sctp_sndrcvinfo sinfo;
470 struct file *fp = NULL;
471 struct sockaddr *fromsa;
474 struct uio *ktruio = NULL;
477 int error, fromlen, i, msg_flags;
479 AUDIT_ARG_FD(uap->sd);
480 error = getsock_cap(td, uap->sd, cap_rights_init(&rights, CAP_RECV),
484 #ifdef COMPAT_FREEBSD32
485 if (SV_CURPROC_FLAG(SV_ILP32))
486 error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
487 uap->iovlen, &iov, EMSGSIZE);
490 error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
495 if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
500 error = mac_socket_check_receive(td->td_ucred, so);
505 if (uap->fromlenaddr != NULL) {
506 error = copyin(uap->fromlenaddr, &fromlen, sizeof (fromlen));
512 if (uap->msg_flags) {
513 error = copyin(uap->msg_flags, &msg_flags, sizeof (int));
520 auio.uio_iovcnt = uap->iovlen;
521 auio.uio_segflg = UIO_USERSPACE;
522 auio.uio_rw = UIO_READ;
524 auio.uio_offset = 0; /* XXX */
527 for (i = 0; i <uap->iovlen; i++, tiov++) {
528 if ((auio.uio_resid += tiov->iov_len) < 0) {
533 len = auio.uio_resid;
534 fromsa = (struct sockaddr *)sockbufstore;
537 if (KTRPOINT(td, KTR_GENIO))
538 ktruio = cloneuio(&auio);
540 memset(&sinfo, 0, sizeof(struct sctp_sndrcvinfo));
541 CURVNET_SET(so->so_vnet);
542 error = sctp_sorecvmsg(so, &auio, (struct mbuf **)NULL,
543 fromsa, fromlen, &msg_flags,
544 (struct sctp_sndrcvinfo *)&sinfo, 1);
547 if (auio.uio_resid != len && (error == ERESTART ||
548 error == EINTR || error == EWOULDBLOCK))
552 error = copyout(&sinfo, uap->sinfo, sizeof (sinfo));
555 if (ktruio != NULL) {
556 ktruio->uio_resid = len - auio.uio_resid;
557 ktrgenio(uap->sd, UIO_READ, ktruio, error);
562 td->td_retval[0] = len - auio.uio_resid;
564 if (fromlen && uap->from) {
566 if (len <= 0 || fromsa == NULL)
569 len = MIN(len, fromsa->sa_len);
570 error = copyout(fromsa, uap->from, (size_t)len);
574 error = copyout(&len, uap->fromlenaddr, sizeof (socklen_t));
579 if (KTRPOINT(td, KTR_STRUCT))
582 if (uap->msg_flags) {
583 error = copyout(&msg_flags, uap->msg_flags, sizeof (int));