2 * Copyright (c) 1982, 1986, 1989, 1990, 1993
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9 * notice, this list of conditions and the following disclaimer.
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31 #include <sys/cdefs.h>
32 #include "opt_capsicum.h"
34 #include "opt_ktrace.h"
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/capsicum.h>
39 #include <sys/kernel.h>
41 #include <sys/mutex.h>
42 #include <sys/sysproto.h>
43 #include <sys/malloc.h>
44 #include <sys/filedesc.h>
45 #include <sys/event.h>
47 #include <sys/fcntl.h>
49 #include <sys/filio.h>
51 #include <sys/mount.h>
53 #include <sys/protosw.h>
54 #include <sys/sf_buf.h>
55 #include <sys/sysent.h>
56 #include <sys/socket.h>
57 #include <sys/socketvar.h>
58 #include <sys/signalvar.h>
59 #include <sys/syscall.h>
60 #include <sys/syscallsubr.h>
61 #include <sys/sysctl.h>
63 #include <sys/vnode.h>
65 #include <sys/ktrace.h>
67 #ifdef COMPAT_FREEBSD32
68 #include <compat/freebsd32/freebsd32.h>
69 #include <compat/freebsd32/freebsd32_syscall.h>
70 #include <compat/freebsd32/freebsd32_util.h>
75 #include <security/audit/audit.h>
76 #include <security/mac/mac_framework.h>
78 #include <netinet/sctp.h>
79 #include <netinet/sctp_os_bsd.h>
80 #include <netinet/sctp_peeloff.h>
82 static struct syscall_helper_data sctp_syscalls[] = {
83 SYSCALL_INIT_HELPER_F(sctp_peeloff, SYF_CAPENABLED),
84 SYSCALL_INIT_HELPER_F(sctp_generic_sendmsg, SYF_CAPENABLED),
85 SYSCALL_INIT_HELPER_F(sctp_generic_sendmsg_iov, SYF_CAPENABLED),
86 SYSCALL_INIT_HELPER_F(sctp_generic_recvmsg, SYF_CAPENABLED),
90 #ifdef COMPAT_FREEBSD32
91 static struct syscall_helper_data sctp32_syscalls[] = {
92 SYSCALL32_INIT_HELPER_COMPAT(sctp_peeloff),
93 SYSCALL32_INIT_HELPER_COMPAT(sctp_generic_sendmsg),
94 SYSCALL32_INIT_HELPER_COMPAT(sctp_generic_sendmsg_iov),
95 SYSCALL32_INIT_HELPER_COMPAT(sctp_generic_recvmsg),
101 sctp_syscalls_init(void)
105 error = syscall_helper_register(sctp_syscalls, SY_THR_STATIC_KLD);
108 #ifdef COMPAT_FREEBSD32
109 error = syscall32_helper_register(sctp32_syscalls, SY_THR_STATIC_KLD);
117 SYSINIT(sctp_syscalls, SI_SUB_SYSCALLS, SI_ORDER_ANY, sctp_syscalls_init, NULL);
121 sctp_syscalls_uninit(void)
125 #ifdef COMPAT_FREEBSD32
126 error = syscall32_helper_unregister(sctp32_syscalls);
130 error = syscall_helper_unregister(sctp_syscalls);
140 sys_sctp_peeloff(struct thread *td, struct sctp_peeloff_args *uap)
142 struct file *headfp, *nfp = NULL;
143 struct socket *head, *so;
148 AUDIT_ARG_FD(uap->sd);
149 error = getsock(td, uap->sd, cap_rights_init_one(&rights, CAP_PEELOFF),
153 fflag = atomic_load_int(&headfp->f_flag);
154 head = headfp->f_data;
155 if (head->so_proto->pr_protocol != IPPROTO_SCTP) {
159 error = sctp_can_peel_off(head, (sctp_assoc_t)uap->name);
163 * At this point we know we do have a assoc to pull
164 * we proceed to get the fd setup. This may block
168 error = falloc(td, &nfp, &fd, 0);
171 td->td_retval[0] = fd;
173 CURVNET_SET(head->so_vnet);
174 so = sopeeloff(head);
179 finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
180 error = sctp_do_peeloff(head, so, (sctp_assoc_t)uap->name);
183 if (head->so_sigio != NULL)
184 fsetown(fgetown(&head->so_sigio), &so->so_sigio);
188 * close the new descriptor, assuming someone hasn't ripped it
192 fdclose(td, nfp, fd);
195 * Release explicitly held references before returning.
207 sys_sctp_generic_sendmsg(struct thread *td, struct sctp_generic_sendmsg_args *uap)
209 struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
211 struct file *fp = NULL;
212 struct sockaddr *to = NULL;
214 struct uio *ktruio = NULL;
221 if (uap->sinfo != NULL) {
222 error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
228 cap_rights_init_one(&rights, CAP_SEND);
229 if (uap->tolen != 0) {
230 error = getsockaddr(&to, uap->to, uap->tolen);
235 cap_rights_set_one(&rights, CAP_CONNECT);
238 AUDIT_ARG_FD(uap->sd);
239 error = getsock(td, uap->sd, &rights, &fp);
243 if (to && (KTRPOINT(td, KTR_STRUCT)))
247 iov[0].iov_base = uap->msg;
248 iov[0].iov_len = uap->mlen;
250 so = (struct socket *)fp->f_data;
251 if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
256 error = mac_socket_check_send(td->td_ucred, so);
263 auio.uio_segflg = UIO_USERSPACE;
264 auio.uio_rw = UIO_WRITE;
266 auio.uio_offset = 0; /* XXX */
269 if (KTRPOINT(td, KTR_GENIO))
270 ktruio = cloneuio(&auio);
272 len = auio.uio_resid = uap->mlen;
273 CURVNET_SET(so->so_vnet);
274 error = sctp_lower_sosend(so, to, &auio, (struct mbuf *)NULL,
275 (struct mbuf *)NULL, uap->flags, u_sinfo, td);
278 if (auio.uio_resid != len && (error == ERESTART ||
279 error == EINTR || error == EWOULDBLOCK))
281 /* Generation of SIGPIPE can be controlled per socket. */
282 if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
283 !(uap->flags & MSG_NOSIGNAL)) {
284 PROC_LOCK(td->td_proc);
285 tdsignal(td, SIGPIPE);
286 PROC_UNLOCK(td->td_proc);
290 td->td_retval[0] = len - auio.uio_resid;
292 if (ktruio != NULL) {
293 ktruio->uio_resid = td->td_retval[0];
294 ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
306 sys_sctp_generic_sendmsg_iov(struct thread *td, struct sctp_generic_sendmsg_iov_args *uap)
308 struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
310 struct file *fp = NULL;
311 struct sockaddr *to = NULL;
313 struct uio *ktruio = NULL;
316 struct iovec *iov, *tiov;
321 if (uap->sinfo != NULL) {
322 error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
327 cap_rights_init_one(&rights, CAP_SEND);
328 if (uap->tolen != 0) {
329 error = getsockaddr(&to, uap->to, uap->tolen);
334 cap_rights_set_one(&rights, CAP_CONNECT);
337 AUDIT_ARG_FD(uap->sd);
338 error = getsock(td, uap->sd, &rights, &fp);
342 #ifdef COMPAT_FREEBSD32
343 if (SV_CURPROC_FLAG(SV_ILP32))
344 error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
345 uap->iovlen, &iov, EMSGSIZE);
348 error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
352 if (to && (KTRPOINT(td, KTR_STRUCT)))
356 so = (struct socket *)fp->f_data;
357 if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
362 error = mac_socket_check_send(td->td_ucred, so);
368 auio.uio_iovcnt = uap->iovlen;
369 auio.uio_segflg = UIO_USERSPACE;
370 auio.uio_rw = UIO_WRITE;
372 auio.uio_offset = 0; /* XXX */
375 for (i = 0; i <uap->iovlen; i++, tiov++) {
376 if ((auio.uio_resid += tiov->iov_len) < 0) {
382 if (KTRPOINT(td, KTR_GENIO))
383 ktruio = cloneuio(&auio);
385 len = auio.uio_resid;
386 CURVNET_SET(so->so_vnet);
387 error = sctp_lower_sosend(so, to, &auio,
388 (struct mbuf *)NULL, (struct mbuf *)NULL,
389 uap->flags, u_sinfo, td);
392 if (auio.uio_resid != len && (error == ERESTART ||
393 error == EINTR || error == EWOULDBLOCK))
395 /* Generation of SIGPIPE can be controlled per socket */
396 if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
397 !(uap->flags & MSG_NOSIGNAL)) {
398 PROC_LOCK(td->td_proc);
399 tdsignal(td, SIGPIPE);
400 PROC_UNLOCK(td->td_proc);
404 td->td_retval[0] = len - auio.uio_resid;
406 if (ktruio != NULL) {
407 ktruio->uio_resid = td->td_retval[0];
408 ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
422 sys_sctp_generic_recvmsg(struct thread *td, struct sctp_generic_recvmsg_args *uap)
424 uint8_t sockbufstore[256];
426 struct iovec *iov, *tiov;
427 struct sctp_sndrcvinfo sinfo;
429 struct file *fp = NULL;
430 struct sockaddr *fromsa;
433 struct uio *ktruio = NULL;
436 int error, fromlen, i, msg_flags;
438 AUDIT_ARG_FD(uap->sd);
439 error = getsock(td, uap->sd, cap_rights_init_one(&rights, CAP_RECV),
443 #ifdef COMPAT_FREEBSD32
444 if (SV_CURPROC_FLAG(SV_ILP32))
445 error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
446 uap->iovlen, &iov, EMSGSIZE);
449 error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
454 if (so->so_proto->pr_protocol != IPPROTO_SCTP) {
459 error = mac_socket_check_receive(td->td_ucred, so);
464 if (uap->fromlenaddr != NULL) {
465 error = copyin(uap->fromlenaddr, &fromlen, sizeof (fromlen));
471 if (uap->msg_flags) {
472 error = copyin(uap->msg_flags, &msg_flags, sizeof (int));
479 auio.uio_iovcnt = uap->iovlen;
480 auio.uio_segflg = UIO_USERSPACE;
481 auio.uio_rw = UIO_READ;
483 auio.uio_offset = 0; /* XXX */
486 for (i = 0; i <uap->iovlen; i++, tiov++) {
487 if ((auio.uio_resid += tiov->iov_len) < 0) {
492 len = auio.uio_resid;
493 fromsa = (struct sockaddr *)sockbufstore;
496 if (KTRPOINT(td, KTR_GENIO))
497 ktruio = cloneuio(&auio);
499 memset(&sinfo, 0, sizeof(struct sctp_sndrcvinfo));
500 CURVNET_SET(so->so_vnet);
501 error = sctp_sorecvmsg(so, &auio, (struct mbuf **)NULL,
502 fromsa, fromlen, &msg_flags,
503 (struct sctp_sndrcvinfo *)&sinfo, 1);
506 if (auio.uio_resid != len && (error == ERESTART ||
507 error == EINTR || error == EWOULDBLOCK))
511 error = copyout(&sinfo, uap->sinfo, sizeof (sinfo));
514 if (ktruio != NULL) {
515 ktruio->uio_resid = len - auio.uio_resid;
516 ktrgenio(uap->sd, UIO_READ, ktruio, error);
521 td->td_retval[0] = len - auio.uio_resid;
523 if (fromlen && uap->from) {
525 if (len <= 0 || fromsa == NULL)
528 len = MIN(len, fromsa->sa_len);
529 error = copyout(fromsa, uap->from, (size_t)len);
533 error = copyout(&len, uap->fromlenaddr, sizeof (socklen_t));
538 if (KTRPOINT(td, KTR_STRUCT))
541 if (uap->msg_flags) {
542 error = copyout(&msg_flags, uap->msg_flags, sizeof (int));