2 * Copyright (c) 1982, 1986, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
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8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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14 * may be used to endorse or promote products derived from this software
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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 = sopeeloff(head);
160 finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
161 error = sctp_do_peeloff(head, so, (sctp_assoc_t)uap->name);
164 if (head->so_sigio != NULL)
165 fsetown(fgetown(&head->so_sigio), &so->so_sigio);
169 * close the new descriptor, assuming someone hasn't ripped it
173 fdclose(td, nfp, fd);
176 * Release explicitly held references before returning.
191 sys_sctp_generic_sendmsg (td, uap)
193 struct sctp_generic_sendmsg_args /* {
199 struct sctp_sndrcvinfo *sinfo,
203 #if (defined(INET) || defined(INET6)) && defined(SCTP)
204 struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
206 struct file *fp = NULL;
207 struct sockaddr *to = NULL;
209 struct uio *ktruio = NULL;
216 if (uap->sinfo != NULL) {
217 error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
223 cap_rights_init(&rights, CAP_SEND);
224 if (uap->tolen != 0) {
225 error = getsockaddr(&to, uap->to, uap->tolen);
230 cap_rights_set(&rights, CAP_CONNECT);
233 AUDIT_ARG_FD(uap->sd);
234 error = getsock_cap(td, uap->sd, &rights, &fp, NULL, NULL);
238 if (to && (KTRPOINT(td, KTR_STRUCT)))
242 iov[0].iov_base = uap->msg;
243 iov[0].iov_len = uap->mlen;
245 so = (struct socket *)fp->f_data;
246 if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
251 error = mac_socket_check_send(td->td_ucred, so);
258 auio.uio_segflg = UIO_USERSPACE;
259 auio.uio_rw = UIO_WRITE;
261 auio.uio_offset = 0; /* XXX */
264 if (KTRPOINT(td, KTR_GENIO))
265 ktruio = cloneuio(&auio);
267 len = auio.uio_resid = uap->mlen;
268 CURVNET_SET(so->so_vnet);
269 error = sctp_lower_sosend(so, to, &auio, (struct mbuf *)NULL,
270 (struct mbuf *)NULL, uap->flags, u_sinfo, td);
273 if (auio.uio_resid != len && (error == ERESTART ||
274 error == EINTR || error == EWOULDBLOCK))
276 /* Generation of SIGPIPE can be controlled per socket. */
277 if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
278 !(uap->flags & MSG_NOSIGNAL)) {
279 PROC_LOCK(td->td_proc);
280 tdsignal(td, SIGPIPE);
281 PROC_UNLOCK(td->td_proc);
285 td->td_retval[0] = len - auio.uio_resid;
287 if (ktruio != NULL) {
288 ktruio->uio_resid = td->td_retval[0];
289 ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
304 sys_sctp_generic_sendmsg_iov(td, uap)
306 struct sctp_generic_sendmsg_iov_args /* {
312 struct sctp_sndrcvinfo *sinfo,
316 #if (defined(INET) || defined(INET6)) && defined(SCTP)
317 struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
319 struct file *fp = NULL;
320 struct sockaddr *to = NULL;
322 struct uio *ktruio = NULL;
325 struct iovec *iov, *tiov;
330 if (uap->sinfo != NULL) {
331 error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
336 cap_rights_init(&rights, CAP_SEND);
337 if (uap->tolen != 0) {
338 error = getsockaddr(&to, uap->to, uap->tolen);
343 cap_rights_set(&rights, CAP_CONNECT);
346 AUDIT_ARG_FD(uap->sd);
347 error = getsock_cap(td, uap->sd, &rights, &fp, NULL, NULL);
351 #ifdef COMPAT_FREEBSD32
352 if (SV_CURPROC_FLAG(SV_ILP32))
353 error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
354 uap->iovlen, &iov, EMSGSIZE);
357 error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
361 if (to && (KTRPOINT(td, KTR_STRUCT)))
365 so = (struct socket *)fp->f_data;
366 if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
371 error = mac_socket_check_send(td->td_ucred, so);
377 auio.uio_iovcnt = uap->iovlen;
378 auio.uio_segflg = UIO_USERSPACE;
379 auio.uio_rw = UIO_WRITE;
381 auio.uio_offset = 0; /* XXX */
384 for (i = 0; i <uap->iovlen; i++, tiov++) {
385 if ((auio.uio_resid += tiov->iov_len) < 0) {
391 if (KTRPOINT(td, KTR_GENIO))
392 ktruio = cloneuio(&auio);
394 len = auio.uio_resid;
395 CURVNET_SET(so->so_vnet);
396 error = sctp_lower_sosend(so, to, &auio,
397 (struct mbuf *)NULL, (struct mbuf *)NULL,
398 uap->flags, u_sinfo, td);
401 if (auio.uio_resid != len && (error == ERESTART ||
402 error == EINTR || error == EWOULDBLOCK))
404 /* Generation of SIGPIPE can be controlled per socket */
405 if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
406 !(uap->flags & MSG_NOSIGNAL)) {
407 PROC_LOCK(td->td_proc);
408 tdsignal(td, SIGPIPE);
409 PROC_UNLOCK(td->td_proc);
413 td->td_retval[0] = len - auio.uio_resid;
415 if (ktruio != NULL) {
416 ktruio->uio_resid = td->td_retval[0];
417 ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
434 sys_sctp_generic_recvmsg(td, uap)
436 struct sctp_generic_recvmsg_args /* {
440 struct sockaddr *from,
441 __socklen_t *fromlenaddr,
442 struct sctp_sndrcvinfo *sinfo,
446 #if (defined(INET) || defined(INET6)) && defined(SCTP)
447 uint8_t sockbufstore[256];
449 struct iovec *iov, *tiov;
450 struct sctp_sndrcvinfo sinfo;
452 struct file *fp = NULL;
453 struct sockaddr *fromsa;
456 struct uio *ktruio = NULL;
459 int error, fromlen, i, msg_flags;
461 AUDIT_ARG_FD(uap->sd);
462 error = getsock_cap(td, uap->sd, cap_rights_init(&rights, CAP_RECV),
466 #ifdef COMPAT_FREEBSD32
467 if (SV_CURPROC_FLAG(SV_ILP32))
468 error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
469 uap->iovlen, &iov, EMSGSIZE);
472 error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
477 if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
482 error = mac_socket_check_receive(td->td_ucred, so);
487 if (uap->fromlenaddr != NULL) {
488 error = copyin(uap->fromlenaddr, &fromlen, sizeof (fromlen));
494 if (uap->msg_flags) {
495 error = copyin(uap->msg_flags, &msg_flags, sizeof (int));
502 auio.uio_iovcnt = uap->iovlen;
503 auio.uio_segflg = UIO_USERSPACE;
504 auio.uio_rw = UIO_READ;
506 auio.uio_offset = 0; /* XXX */
509 for (i = 0; i <uap->iovlen; i++, tiov++) {
510 if ((auio.uio_resid += tiov->iov_len) < 0) {
515 len = auio.uio_resid;
516 fromsa = (struct sockaddr *)sockbufstore;
519 if (KTRPOINT(td, KTR_GENIO))
520 ktruio = cloneuio(&auio);
522 memset(&sinfo, 0, sizeof(struct sctp_sndrcvinfo));
523 CURVNET_SET(so->so_vnet);
524 error = sctp_sorecvmsg(so, &auio, (struct mbuf **)NULL,
525 fromsa, fromlen, &msg_flags,
526 (struct sctp_sndrcvinfo *)&sinfo, 1);
529 if (auio.uio_resid != len && (error == ERESTART ||
530 error == EINTR || error == EWOULDBLOCK))
534 error = copyout(&sinfo, uap->sinfo, sizeof (sinfo));
537 if (ktruio != NULL) {
538 ktruio->uio_resid = len - auio.uio_resid;
539 ktrgenio(uap->sd, UIO_READ, ktruio, error);
544 td->td_retval[0] = len - auio.uio_resid;
546 if (fromlen && uap->from) {
548 if (len <= 0 || fromsa == NULL)
551 len = MIN(len, fromsa->sa_len);
552 error = copyout(fromsa, uap->from, (size_t)len);
556 error = copyout(&len, uap->fromlenaddr, sizeof (socklen_t));
561 if (KTRPOINT(td, KTR_STRUCT))
564 if (uap->msg_flags) {
565 error = copyout(&msg_flags, uap->msg_flags, sizeof (int));