/* $OpenBSD: uipc_syscalls.c,v 1.63 2006/03/26 17:47:10 mickey Exp $ */ /* $NetBSD: uipc_syscalls.c,v 1.19 1996/02/09 19:00:48 christos Exp $ */ /* * Copyright (c) 1982, 1986, 1989, 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef KTRACE #include #endif #include #include /* * System call interface to the socket abstraction. */ extern struct fileops socketops; int sys_socket(struct proc *p, void *v, register_t *retval) { struct sys_socket_args /* { syscallarg(int) domain; syscallarg(int) type; syscallarg(int) protocol; } */ *uap = v; struct filedesc *fdp = p->p_fd; struct socket *so; struct file *fp; int fd, error; fdplock(fdp); if ((error = falloc(p, &fp, &fd)) != 0) goto out; fp->f_flag = FREAD|FWRITE; fp->f_type = DTYPE_SOCKET; fp->f_ops = &socketops; error = socreate(SCARG(uap, domain), &so, SCARG(uap, type), SCARG(uap, protocol)); if (error) { fdremove(fdp, fd); closef(fp, p); } else { fp->f_data = so; FILE_SET_MATURE(fp); *retval = fd; } out: fdpunlock(fdp); return (error); } /* ARGSUSED */ int sys_bind(struct proc *p, void *v, register_t *retval) { struct sys_bind_args /* { syscallarg(int) s; syscallarg(const struct sockaddr *) name; syscallarg(socklen_t) namelen; } */ *uap = v; struct file *fp; struct mbuf *nam; int error; if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) return (error); error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen), MT_SONAME); if (error == 0) { error = sobind((struct socket *)fp->f_data, nam); m_freem(nam); } FRELE(fp); return (error); } /* ARGSUSED */ int sys_listen(struct proc *p, void *v, register_t *retval) { struct sys_listen_args /* { syscallarg(int) s; syscallarg(int) backlog; } */ *uap = v; struct file *fp; int error; if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) return (error); error = solisten((struct socket *)fp->f_data, SCARG(uap, backlog)); FRELE(fp); return (error); } int sys_accept(struct proc *p, void *v, register_t *retval) { struct sys_accept_args /* { syscallarg(int) s; syscallarg(struct sockaddr *) name; syscallarg(socklen_t *) anamelen; } */ *uap = v; struct file *fp, *headfp; struct mbuf *nam; socklen_t namelen; int error, s, tmpfd; struct socket *head, *so; int nflag; if (SCARG(uap, name) && (error = copyin(SCARG(uap, anamelen), &namelen, sizeof (namelen)))) return (error); if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) return (error); headfp = fp; s = splsoftnet(); head = (struct socket *)fp->f_data; if ((head->so_options & SO_ACCEPTCONN) == 0) { error = EINVAL; goto bad; } if ((head->so_state & SS_NBIO) && head->so_qlen == 0) { error = EWOULDBLOCK; goto bad; } while (head->so_qlen == 0 && head->so_error == 0) { if (head->so_state & SS_CANTRCVMORE) { head->so_error = ECONNABORTED; break; } error = tsleep(&head->so_timeo, PSOCK | PCATCH, netcon, 0); if (error) { goto bad; } } if (head->so_error) { error = head->so_error; head->so_error = 0; goto bad; } /* * At this point we know that there is at least one connection * ready to be accepted. Remove it from the queue prior to * allocating the file descriptor for it since falloc() may * block allowing another process to accept the connection * instead. */ so = TAILQ_FIRST(&head->so_q); if (soqremque(so, 1) == 0) panic("accept"); /* Take note if socket was non-blocking. */ nflag = (fp->f_flag & FNONBLOCK); fdplock(p->p_fd); if ((error = falloc(p, &fp, &tmpfd)) != 0) { /* * Probably ran out of file descriptors. Put the * unaccepted connection back onto the queue and * do another wakeup so some other process might * have a chance at it. */ so->so_head = head; head->so_qlen++; so->so_onq = &head->so_q; TAILQ_INSERT_HEAD(so->so_onq, so, so_qe); wakeup_one(&head->so_timeo); goto bad; } *retval = tmpfd; /* connection has been removed from the listen queue */ KNOTE(&head->so_rcv.sb_sel.si_note, 0); fp->f_type = DTYPE_SOCKET; fp->f_flag = FREAD | FWRITE | nflag; fp->f_ops = &socketops; fp->f_data = so; nam = m_get(M_WAIT, MT_SONAME); error = soaccept(so, nam); if (!error && SCARG(uap, name)) { if (namelen > nam->m_len) namelen = nam->m_len; /* SHOULD COPY OUT A CHAIN HERE */ if ((error = copyout(mtod(nam, caddr_t), SCARG(uap, name), namelen)) == 0) error = copyout(&namelen, SCARG(uap, anamelen), sizeof (*SCARG(uap, anamelen))); } /* if an error occurred, free the file descriptor */ if (error) { fdremove(p->p_fd, tmpfd); closef(fp, p); } else { FILE_SET_MATURE(fp); } m_freem(nam); bad: fdpunlock(p->p_fd); splx(s); FRELE(headfp); return (error); } /* ARGSUSED */ int sys_connect(struct proc *p, void *v, register_t *retval) { struct sys_connect_args /* { syscallarg(int) s; syscallarg(const struct sockaddr *) name; syscallarg(socklen_t) namelen; } */ *uap = v; struct file *fp; struct socket *so; struct mbuf *nam = NULL; int error, s; if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) return (error); so = (struct socket *)fp->f_data; if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { FRELE(fp); return (EALREADY); } error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen), MT_SONAME); if (error) goto bad; error = soconnect(so, nam); if (error) goto bad; if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) { FRELE(fp); m_freem(nam); return (EINPROGRESS); } s = splsoftnet(); while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { error = tsleep(&so->so_timeo, PSOCK | PCATCH, netcon, 0); if (error) break; } if (error == 0) { error = so->so_error; so->so_error = 0; } splx(s); bad: so->so_state &= ~SS_ISCONNECTING; FRELE(fp); if (nam) m_freem(nam); if (error == ERESTART) error = EINTR; return (error); } int sys_socketpair(struct proc *p, void *v, register_t *retval) { struct sys_socketpair_args /* { syscallarg(int) domain; syscallarg(int) type; syscallarg(int) protocol; syscallarg(int *) rsv; } */ *uap = v; struct filedesc *fdp = p->p_fd; struct file *fp1, *fp2; struct socket *so1, *so2; int fd, error, sv[2]; error = socreate(SCARG(uap, domain), &so1, SCARG(uap, type), SCARG(uap, protocol)); if (error) return (error); error = socreate(SCARG(uap, domain), &so2, SCARG(uap, type), SCARG(uap, protocol)); if (error) goto free1; fdplock(fdp); if ((error = falloc(p, &fp1, &fd)) != 0) goto free2; sv[0] = fd; fp1->f_flag = FREAD|FWRITE; fp1->f_type = DTYPE_SOCKET; fp1->f_ops = &socketops; fp1->f_data = so1; if ((error = falloc(p, &fp2, &fd)) != 0) goto free3; fp2->f_flag = FREAD|FWRITE; fp2->f_type = DTYPE_SOCKET; fp2->f_ops = &socketops; fp2->f_data = so2; sv[1] = fd; if ((error = soconnect2(so1, so2)) != 0) goto free4; if (SCARG(uap, type) == SOCK_DGRAM) { /* * Datagram socket connection is asymmetric. */ if ((error = soconnect2(so2, so1)) != 0) goto free4; } error = copyout(sv, SCARG(uap, rsv), 2 * sizeof (int)); if (error == 0) { FILE_SET_MATURE(fp1); FILE_SET_MATURE(fp2); fdpunlock(fdp); return (0); } free4: fdremove(fdp, sv[1]); closef(fp2, p); so2 = NULL; free3: fdremove(fdp, sv[0]); closef(fp1, p); so1 = NULL; free2: if (so2 != NULL) (void)soclose(so2); fdpunlock(fdp); free1: if (so1 != NULL) (void)soclose(so1); return (error); } int sys_sendto(struct proc *p, void *v, register_t *retval) { struct sys_sendto_args /* { syscallarg(int) s; syscallarg(const void *) buf; syscallarg(size_t) len; syscallarg(int) flags; syscallarg(const struct sockaddr *) to; syscallarg(socklen_t) tolen; } */ *uap = v; struct msghdr msg; struct iovec aiov; msg.msg_name = (caddr_t)SCARG(uap, to); msg.msg_namelen = SCARG(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 = (char *)SCARG(uap, buf); aiov.iov_len = SCARG(uap, len); return (sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval)); } int sys_sendmsg(struct proc *p, void *v, register_t *retval) { struct sys_sendmsg_args /* { syscallarg(int) s; syscallarg(const struct msghdr *) msg; syscallarg(int) flags; } */ *uap = v; struct msghdr msg; struct iovec aiov[UIO_SMALLIOV], *iov; int error; error = copyin(SCARG(uap, msg), &msg, sizeof (msg)); if (error) return (error); if (msg.msg_iovlen > IOV_MAX) return (EMSGSIZE); if (msg.msg_iovlen > UIO_SMALLIOV) iov = malloc(sizeof(struct iovec) * msg.msg_iovlen, M_IOV, M_WAITOK); else iov = aiov; if (msg.msg_iovlen && (error = copyin(msg.msg_iov, iov, (unsigned)(msg.msg_iovlen * sizeof (struct iovec))))) goto done; msg.msg_iov = iov; #ifdef COMPAT_OLDSOCK msg.msg_flags = 0; #endif error = sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval); done: if (iov != aiov) free(iov, M_IOV); return (error); } int sendit(struct proc *p, int s, struct msghdr *mp, int flags, register_t *retsize) { struct file *fp; struct uio auio; struct iovec *iov; int i; struct mbuf *to, *control; int len, error; #ifdef KTRACE struct iovec *ktriov = NULL; #endif to = NULL; if ((error = getsock(p->p_fd, s, &fp)) != 0) return (error); auio.uio_iov = mp->msg_iov; auio.uio_iovcnt = mp->msg_iovlen; auio.uio_segflg = UIO_USERSPACE; auio.uio_rw = UIO_WRITE; auio.uio_procp = p; auio.uio_offset = 0; /* XXX */ auio.uio_resid = 0; iov = mp->msg_iov; for (i = 0; i < mp->msg_iovlen; i++, iov++) { /* Don't allow sum > SSIZE_MAX */ if (iov->iov_len > SSIZE_MAX || (auio.uio_resid += iov->iov_len) > SSIZE_MAX) { error = EINVAL; goto bad; } } if (mp->msg_name) { error = sockargs(&to, mp->msg_name, mp->msg_namelen, MT_SONAME); if (error) goto bad; } 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) { struct cmsghdr *cm; M_PREPEND(control, sizeof(*cm), M_WAIT); cm = mtod(control, struct cmsghdr *); cm->cmsg_len = control->m_len; cm->cmsg_level = SOL_SOCKET; cm->cmsg_type = SCM_RIGHTS; } #endif } else control = 0; #ifdef KTRACE if (KTRPOINT(p, KTR_GENIO)) { int iovlen = auio.uio_iovcnt * sizeof (struct iovec); ktriov = malloc(iovlen, M_TEMP, M_WAITOK); bcopy(auio.uio_iov, ktriov, iovlen); } #endif len = auio.uio_resid; error = sosend((struct socket *)fp->f_data, to, &auio, NULL, control, flags); if (error) { if (auio.uio_resid != len && (error == ERESTART || error == EINTR || error == EWOULDBLOCK)) error = 0; if (error == EPIPE) psignal(p, SIGPIPE); } if (error == 0) { *retsize = len - auio.uio_resid; fp->f_wxfer++; fp->f_wbytes += *retsize; } #ifdef KTRACE if (ktriov != NULL) { if (error == 0) ktrgenio(p, s, UIO_WRITE, ktriov, *retsize, error); free(ktriov, M_TEMP); } #endif bad: FRELE(fp); if (to) m_freem(to); return (error); } int sys_recvfrom(struct proc *p, void *v, register_t *retval) { struct sys_recvfrom_args /* { syscallarg(int) s; syscallarg(void *) buf; syscallarg(size_t) len; syscallarg(int) flags; syscallarg(struct sockaddr *) from; syscallarg(socklen_t *) fromlenaddr; } */ *uap = v; struct msghdr msg; struct iovec aiov; int error; if (SCARG(uap, fromlenaddr)) { error = copyin(SCARG(uap, fromlenaddr), &msg.msg_namelen, sizeof (msg.msg_namelen)); if (error) return (error); } else msg.msg_namelen = 0; msg.msg_name = (caddr_t)SCARG(uap, from); msg.msg_iov = &aiov; msg.msg_iovlen = 1; aiov.iov_base = SCARG(uap, buf); aiov.iov_len = SCARG(uap, len); msg.msg_control = 0; msg.msg_flags = SCARG(uap, flags); return (recvit(p, SCARG(uap, s), &msg, (caddr_t)SCARG(uap, fromlenaddr), retval)); } int sys_recvmsg(struct proc *p, void *v, register_t *retval) { struct sys_recvmsg_args /* { syscallarg(int) s; syscallarg(struct msghdr *) msg; syscallarg(int) flags; } */ *uap = v; struct msghdr msg; struct iovec aiov[UIO_SMALLIOV], *uiov, *iov; int error; error = copyin(SCARG(uap, msg), &msg, sizeof (msg)); if (error) return (error); if (msg.msg_iovlen > IOV_MAX) return (EMSGSIZE); if (msg.msg_iovlen > UIO_SMALLIOV) iov = malloc(sizeof(struct iovec) * msg.msg_iovlen, M_IOV, M_WAITOK); else iov = aiov; #ifdef COMPAT_OLDSOCK msg.msg_flags = SCARG(uap, flags) &~ MSG_COMPAT; #else msg.msg_flags = SCARG(uap, flags); #endif if (msg.msg_iovlen > 0) { error = copyin(msg.msg_iov, iov, (unsigned)(msg.msg_iovlen * sizeof (struct iovec))); if (error) goto done; } uiov = msg.msg_iov; msg.msg_iov = iov; if ((error = recvit(p, SCARG(uap, s), &msg, NULL, retval)) == 0) { msg.msg_iov = uiov; error = copyout(&msg, SCARG(uap, msg), sizeof(msg)); } done: if (iov != aiov) free(iov, M_IOV); return (error); } int recvit(struct proc *p, int s, struct msghdr *mp, caddr_t namelenp, register_t *retsize) { struct file *fp; struct uio auio; struct iovec *iov; int i; size_t len; int error; struct mbuf *from = NULL, *control = NULL; #ifdef KTRACE struct iovec *ktriov = NULL; #endif if ((error = getsock(p->p_fd, s, &fp)) != 0) return (error); auio.uio_iov = mp->msg_iov; auio.uio_iovcnt = mp->msg_iovlen; auio.uio_segflg = UIO_USERSPACE; auio.uio_rw = UIO_READ; auio.uio_procp = p; auio.uio_offset = 0; /* XXX */ auio.uio_resid = 0; iov = mp->msg_iov; for (i = 0; i < mp->msg_iovlen; i++, iov++) { /* Don't allow sum > SSIZE_MAX */ if (iov->iov_len > SSIZE_MAX || (auio.uio_resid += iov->iov_len) > SSIZE_MAX) { error = EINVAL; goto out; } } #ifdef KTRACE if (KTRPOINT(p, KTR_GENIO)) { int iovlen = auio.uio_iovcnt * sizeof (struct iovec); ktriov = malloc(iovlen, M_TEMP, M_WAITOK); bcopy(auio.uio_iov, ktriov, iovlen); } #endif len = auio.uio_resid; error = soreceive((struct socket *)fp->f_data, &from, &auio, NULL, mp->msg_control ? &control : NULL, &mp->msg_flags); if (error) { if (auio.uio_resid != len && (error == ERESTART || error == EINTR || error == EWOULDBLOCK)) error = 0; } #ifdef KTRACE if (ktriov != NULL) { if (error == 0) ktrgenio(p, s, UIO_READ, ktriov, len - auio.uio_resid, error); free(ktriov, M_TEMP); } #endif if (error) goto out; *retsize = len - auio.uio_resid; if (mp->msg_name) { socklen_t alen; if (from == NULL) alen = 0; else { /* save sa_len before it is destroyed by MSG_COMPAT */ alen = mp->msg_namelen; if (alen > from->m_len) alen = from->m_len; /* else if alen < from->m_len ??? */ #ifdef COMPAT_OLDSOCK if (mp->msg_flags & MSG_COMPAT) mtod(from, struct osockaddr *)->sa_family = mtod(from, struct sockaddr *)->sa_family; #endif error = copyout(mtod(from, caddr_t), mp->msg_name, alen); if (error) goto out; } mp->msg_namelen = alen; if (namelenp && (error = copyout(&alen, namelenp, sizeof(alen)))) { #ifdef COMPAT_OLDSOCK if (mp->msg_flags & MSG_COMPAT) error = 0; /* old recvfrom didn't check */ else #endif goto out; } } if (mp->msg_control) { #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; if (len <= 0 || control == NULL) len = 0; else { struct mbuf *m = control; caddr_t p = (caddr_t)mp->msg_control; do { i = m->m_len; if (len < i) { mp->msg_flags |= MSG_CTRUNC; i = len; } error = copyout(mtod(m, caddr_t), p, (unsigned)i); if (m->m_next) i = ALIGN(i); p += i; len -= i; if (error != 0 || len <= 0) break; } while ((m = m->m_next) != NULL); len = p - (caddr_t)mp->msg_control; } mp->msg_controllen = len; } if (!error) { fp->f_rxfer++; fp->f_rbytes += *retsize; } out: FRELE(fp); if (from) m_freem(from); if (control) m_freem(control); return (error); } /* ARGSUSED */ int sys_shutdown(struct proc *p, void *v, register_t *retval) { struct sys_shutdown_args /* { syscallarg(int) s; syscallarg(int) how; } */ *uap = v; struct file *fp; int error; if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) return (error); error = soshutdown((struct socket *)fp->f_data, SCARG(uap, how)); FRELE(fp); return (error); } /* ARGSUSED */ int sys_setsockopt(struct proc *p, void *v, register_t *retval) { struct sys_setsockopt_args /* { syscallarg(int) s; syscallarg(int) level; syscallarg(int) name; syscallarg(const void *) val; syscallarg(socklen_t) valsize; } */ *uap = v; struct file *fp; struct mbuf *m = NULL; int error; if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) return (error); if (SCARG(uap, valsize) > MCLBYTES) { error = EINVAL; goto bad; } if (SCARG(uap, val)) { m = m_get(M_WAIT, MT_SOOPTS); if (SCARG(uap, valsize) > MLEN) { MCLGET(m, M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { error = ENOBUFS; goto bad; } } if (m == NULL) { error = ENOBUFS; goto bad; } error = copyin(SCARG(uap, val), mtod(m, caddr_t), SCARG(uap, valsize)); if (error) { goto bad; } m->m_len = SCARG(uap, valsize); } error = sosetopt((struct socket *)fp->f_data, SCARG(uap, level), SCARG(uap, name), m); m = NULL; bad: if (m) m_freem(m); FRELE(fp); return (error); } /* ARGSUSED */ int sys_getsockopt(struct proc *p, void *v, register_t *retval) { struct sys_getsockopt_args /* { syscallarg(int) s; syscallarg(int) level; syscallarg(int) name; syscallarg(void *) val; syscallarg(socklen_t *) avalsize; } */ *uap = v; struct file *fp; struct mbuf *m = NULL; socklen_t valsize; int error; if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0) return (error); if (SCARG(uap, val)) { error = copyin((caddr_t)SCARG(uap, avalsize), (caddr_t)&valsize, sizeof (valsize)); if (error) goto out; } else valsize = 0; if ((error = sogetopt((struct socket *)fp->f_data, SCARG(uap, level), SCARG(uap, name), &m)) == 0 && SCARG(uap, val) && valsize && m != NULL) { if (valsize > m->m_len) valsize = m->m_len; error = copyout(mtod(m, caddr_t), SCARG(uap, val), valsize); if (error == 0) error = copyout((caddr_t)&valsize, (caddr_t)SCARG(uap, avalsize), sizeof (valsize)); } out: FRELE(fp); if (m != NULL) (void) m_free(m); return (error); } int sys_pipe(struct proc *p, void *v, register_t *retval) { struct sys_pipe_args /* { syscallarg(int *) fdp; } */ *uap = v; int error, fds[2]; register_t rval[2]; if ((error = sys_opipe(p, v, rval)) != 0) return (error); fds[0] = rval[0]; fds[1] = rval[1]; error = copyout((caddr_t)fds, (caddr_t)SCARG(uap, fdp), 2 * sizeof (int)); if (error) { fdplock(p->p_fd); fdrelease(p, fds[0]); fdrelease(p, fds[1]); fdpunlock(p->p_fd); } return (error); } /* * Get socket name. */ /* ARGSUSED */ int sys_getsockname(struct proc *p, void *v, register_t *retval) { struct sys_getsockname_args /* { syscallarg(int) fdes; syscallarg(struct sockaddr *) asa; syscallarg(socklen_t *) alen; } */ *uap = v; struct file *fp; struct socket *so; struct mbuf *m = NULL; socklen_t len; int error; if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0) return (error); error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof (len)); if (error) goto bad; so = (struct socket *)fp->f_data; m = m_getclr(M_WAIT, MT_SONAME); error = (*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, 0, m, 0); if (error) goto bad; if (len > m->m_len) len = m->m_len; error = copyout(mtod(m, caddr_t), (caddr_t)SCARG(uap, asa), len); if (error == 0) error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen), sizeof (len)); bad: FRELE(fp); if (m) m_freem(m); return (error); } /* * Get name of peer for connected socket. */ /* ARGSUSED */ int sys_getpeername(struct proc *p, void *v, register_t *retval) { struct sys_getpeername_args /* { syscallarg(int) fdes; syscallarg(struct sockaddr *) asa; syscallarg(socklen_t *) alen; } */ *uap = v; struct file *fp; struct socket *so; struct mbuf *m = NULL; socklen_t len; int error; if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0) return (error); so = (struct socket *)fp->f_data; if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) { FRELE(fp); return (ENOTCONN); } error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof (len)); if (error) goto bad; m = m_getclr(M_WAIT, MT_SONAME); error = (*so->so_proto->pr_usrreq)(so, PRU_PEERADDR, 0, m, 0); if (error) goto bad; if (len > m->m_len) len = m->m_len; error = copyout(mtod(m, caddr_t), (caddr_t)SCARG(uap, asa), len); if (error == 0) error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen), sizeof (len)); bad: FRELE(fp); m_freem(m); return (error); } /* * Get eid of peer for connected socket. */ /* ARGSUSED */ int sys_getpeereid(struct proc *p, void *v, register_t *retval) { struct sys_getpeereid_args /* { syscallarg(int) fdes; syscallarg(uid_t *) euid; syscallarg(gid_t *) egid; } */ *uap = v; struct file *fp; struct socket *so; struct mbuf *m = NULL; struct unpcbid *id; int error; if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0) return (error); so = (struct socket *)fp->f_data; if (so->so_proto != pffindtype(AF_LOCAL, SOCK_STREAM)) { FRELE(fp); return (EOPNOTSUPP); } m = m_getclr(M_WAIT, MT_SONAME); if (m == NULL) { error = ENOBUFS; goto bad; } error = (*so->so_proto->pr_usrreq)(so, PRU_PEEREID, 0, m, 0); if (!error && m->m_len != sizeof(struct unpcbid)) error = EOPNOTSUPP; if (error) goto bad; id = mtod(m, struct unpcbid *); error = copyout((caddr_t)&(id->unp_euid), (caddr_t)SCARG(uap, euid), sizeof(uid_t)); if (error == 0) error = copyout((caddr_t)&(id->unp_egid), (caddr_t)SCARG(uap, egid), sizeof(gid_t)); bad: FRELE(fp); m_freem(m); return (error); } int sockargs(struct mbuf **mp, const void *buf, size_t buflen, int type) { struct sockaddr *sa; struct mbuf *m; int error; /* * We can't allow socket names > UCHAR_MAX in length, since that * will overflow sa_len. Also, control data more than MCLBYTES in * length is just too much. */ if (buflen > (type == MT_SONAME ? UCHAR_MAX : MCLBYTES)) return (EINVAL); /* Allocate an mbuf to hold the arguments. */ m = m_get(M_WAIT, type); if ((u_int)buflen > MLEN) { MCLGET(m, M_WAITOK); if ((m->m_flags & M_EXT) == 0) { m_free(m); return ENOBUFS; } } m->m_len = buflen; error = copyin(buf, mtod(m, caddr_t), buflen); if (error) { (void) m_free(m); return (error); } *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 (0); } int getsock(struct filedesc *fdp, int fdes, struct file **fpp) { struct file *fp; if ((fp = fd_getfile(fdp, fdes)) == NULL) return (EBADF); if (fp->f_type != DTYPE_SOCKET) return (ENOTSOCK); *fpp = fp; FREF(fp); return (0); }