/*- * Copyright (c) 1995 Søren Schmidt * 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 * in this position and unchanged. * 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #include __FBSDID("$FreeBSD$"); /* XXX we use functions that might not exist. */ #include "opt_compat.h" #include "opt_inet6.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET6 #include #include #include #endif #ifdef COMPAT_LINUX32 #include #include #else #include #include #endif #include #include static int linux_to_bsd_domain(int); /* * Reads a linux sockaddr and does any necessary translation. * Linux sockaddrs don't have a length field, only a family. * Copy the osockaddr structure pointed to by osa to kernel, adjust * family and convert to sockaddr. */ static int linux_getsockaddr(struct sockaddr **sap, const struct osockaddr *osa, int salen) { struct sockaddr *sa; struct osockaddr *kosa; #ifdef INET6 struct sockaddr_in6 *sin6; int oldv6size; #endif char *name; int bdom, error, hdrlen, namelen; if (salen < 2 || salen > UCHAR_MAX || !osa) return (EINVAL); #ifdef INET6 oldv6size = 0; /* * Check for old (pre-RFC2553) sockaddr_in6. We may accept it * if it's a v4-mapped address, so reserve the proper space * for it. */ if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) { salen += sizeof(uint32_t); oldv6size = 1; } #endif kosa = malloc(salen, M_SONAME, M_WAITOK); if ((error = copyin(osa, kosa, salen))) goto out; bdom = linux_to_bsd_domain(kosa->sa_family); if (bdom == -1) { error = EAFNOSUPPORT; goto out; } #ifdef INET6 /* * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6, * which lacks the scope id compared with RFC2553 one. If we detect * the situation, reject the address and write a message to system log. * * Still accept addresses for which the scope id is not used. */ if (oldv6size) { if (bdom == AF_INET6) { sin6 = (struct sockaddr_in6 *)kosa; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) || (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) && !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) { sin6->sin6_scope_id = 0; } else { log(LOG_DEBUG, "obsolete pre-RFC2553 sockaddr_in6 rejected\n"); error = EINVAL; goto out; } } else salen -= sizeof(uint32_t); } #endif if (bdom == AF_INET) { if (salen < sizeof(struct sockaddr_in)) { error = EINVAL; goto out; } salen = sizeof(struct sockaddr_in); } if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) { hdrlen = offsetof(struct sockaddr_un, sun_path); name = ((struct sockaddr_un *)kosa)->sun_path; if (*name == '\0') { /* * Linux abstract namespace starts with a NULL byte. * XXX We do not support abstract namespace yet. */ namelen = strnlen(name + 1, salen - hdrlen - 1) + 1; } else namelen = strnlen(name, salen - hdrlen); salen = hdrlen + namelen; if (salen > sizeof(struct sockaddr_un)) { error = ENAMETOOLONG; goto out; } } sa = (struct sockaddr *)kosa; sa->sa_family = bdom; sa->sa_len = salen; *sap = sa; return (0); out: free(kosa, M_SONAME); return (error); } static int linux_to_bsd_domain(int domain) { switch (domain) { case LINUX_AF_UNSPEC: return (AF_UNSPEC); case LINUX_AF_UNIX: return (AF_LOCAL); case LINUX_AF_INET: return (AF_INET); case LINUX_AF_INET6: return (AF_INET6); case LINUX_AF_AX25: return (AF_CCITT); case LINUX_AF_IPX: return (AF_IPX); case LINUX_AF_APPLETALK: return (AF_APPLETALK); } return (-1); } static int bsd_to_linux_domain(int domain) { switch (domain) { case AF_UNSPEC: return (LINUX_AF_UNSPEC); case AF_LOCAL: return (LINUX_AF_UNIX); case AF_INET: return (LINUX_AF_INET); case AF_INET6: return (LINUX_AF_INET6); case AF_CCITT: return (LINUX_AF_AX25); case AF_IPX: return (LINUX_AF_IPX); case AF_APPLETALK: return (LINUX_AF_APPLETALK); } return (-1); } static int linux_to_bsd_sockopt_level(int level) { switch (level) { case LINUX_SOL_SOCKET: return (SOL_SOCKET); } return (level); } static int bsd_to_linux_sockopt_level(int level) { switch (level) { case SOL_SOCKET: return (LINUX_SOL_SOCKET); } return (level); } static int linux_to_bsd_ip_sockopt(int opt) { switch (opt) { case LINUX_IP_TOS: return (IP_TOS); case LINUX_IP_TTL: return (IP_TTL); case LINUX_IP_OPTIONS: return (IP_OPTIONS); case LINUX_IP_MULTICAST_IF: return (IP_MULTICAST_IF); case LINUX_IP_MULTICAST_TTL: return (IP_MULTICAST_TTL); case LINUX_IP_MULTICAST_LOOP: return (IP_MULTICAST_LOOP); case LINUX_IP_ADD_MEMBERSHIP: return (IP_ADD_MEMBERSHIP); case LINUX_IP_DROP_MEMBERSHIP: return (IP_DROP_MEMBERSHIP); case LINUX_IP_HDRINCL: return (IP_HDRINCL); } return (-1); } static int linux_to_bsd_so_sockopt(int opt) { switch (opt) { case LINUX_SO_DEBUG: return (SO_DEBUG); case LINUX_SO_REUSEADDR: return (SO_REUSEADDR); case LINUX_SO_TYPE: return (SO_TYPE); case LINUX_SO_ERROR: return (SO_ERROR); case LINUX_SO_DONTROUTE: return (SO_DONTROUTE); case LINUX_SO_BROADCAST: return (SO_BROADCAST); case LINUX_SO_SNDBUF: return (SO_SNDBUF); case LINUX_SO_RCVBUF: return (SO_RCVBUF); case LINUX_SO_KEEPALIVE: return (SO_KEEPALIVE); case LINUX_SO_OOBINLINE: return (SO_OOBINLINE); case LINUX_SO_LINGER: return (SO_LINGER); case LINUX_SO_PEERCRED: return (LOCAL_PEERCRED); case LINUX_SO_RCVLOWAT: return (SO_RCVLOWAT); case LINUX_SO_SNDLOWAT: return (SO_SNDLOWAT); case LINUX_SO_RCVTIMEO: return (SO_RCVTIMEO); case LINUX_SO_SNDTIMEO: return (SO_SNDTIMEO); case LINUX_SO_TIMESTAMP: return (SO_TIMESTAMP); case LINUX_SO_ACCEPTCONN: return (SO_ACCEPTCONN); } return (-1); } static int linux_to_bsd_tcp_sockopt(int opt) { switch (opt) { case LINUX_TCP_NODELAY: return (TCP_NODELAY); case LINUX_TCP_MAXSEG: return (TCP_MAXSEG); case LINUX_TCP_KEEPIDLE: return (TCP_KEEPIDLE); case LINUX_TCP_KEEPINTVL: return (TCP_KEEPINTVL); case LINUX_TCP_KEEPCNT: return (TCP_KEEPCNT); case LINUX_TCP_MD5SIG: return (TCP_MD5SIG); } return (-1); } static int linux_to_bsd_msg_flags(int flags) { int ret_flags = 0; if (flags & LINUX_MSG_OOB) ret_flags |= MSG_OOB; if (flags & LINUX_MSG_PEEK) ret_flags |= MSG_PEEK; if (flags & LINUX_MSG_DONTROUTE) ret_flags |= MSG_DONTROUTE; if (flags & LINUX_MSG_CTRUNC) ret_flags |= MSG_CTRUNC; if (flags & LINUX_MSG_TRUNC) ret_flags |= MSG_TRUNC; if (flags & LINUX_MSG_DONTWAIT) ret_flags |= MSG_DONTWAIT; if (flags & LINUX_MSG_EOR) ret_flags |= MSG_EOR; if (flags & LINUX_MSG_WAITALL) ret_flags |= MSG_WAITALL; if (flags & LINUX_MSG_NOSIGNAL) ret_flags |= MSG_NOSIGNAL; #if 0 /* not handled */ if (flags & LINUX_MSG_PROXY) ; if (flags & LINUX_MSG_FIN) ; if (flags & LINUX_MSG_SYN) ; if (flags & LINUX_MSG_CONFIRM) ; if (flags & LINUX_MSG_RST) ; if (flags & LINUX_MSG_ERRQUEUE) ; #endif return ret_flags; } /* * If bsd_to_linux_sockaddr() or linux_to_bsd_sockaddr() faults, then the * native syscall will fault. Thus, we don't really need to check the * return values for these functions. */ static int bsd_to_linux_sockaddr(struct sockaddr *arg) { struct sockaddr sa; size_t sa_len = sizeof(struct sockaddr); int error; if ((error = copyin(arg, &sa, sa_len))) return (error); *(u_short *)&sa = sa.sa_family; error = copyout(&sa, arg, sa_len); return (error); } static int linux_to_bsd_sockaddr(struct sockaddr *arg, int len) { struct sockaddr sa; size_t sa_len = sizeof(struct sockaddr); int error; if ((error = copyin(arg, &sa, sa_len))) return (error); sa.sa_family = *(sa_family_t *)&sa; sa.sa_len = len; error = copyout(&sa, arg, sa_len); return (error); } static int linux_sa_put(struct osockaddr *osa) { struct osockaddr sa; int error, bdom; /* * Only read/write the osockaddr family part, the rest is * not changed. */ error = copyin(osa, &sa, sizeof(sa.sa_family)); if (error) return (error); bdom = bsd_to_linux_domain(sa.sa_family); if (bdom == -1) return (EINVAL); sa.sa_family = bdom; error = copyout(&sa, osa, sizeof(sa.sa_family)); if (error) return (error); return (0); } static int linux_to_bsd_cmsg_type(int cmsg_type) { switch (cmsg_type) { case LINUX_SCM_RIGHTS: return (SCM_RIGHTS); case LINUX_SCM_CREDENTIALS: return (SCM_CREDS); } return (-1); } static int bsd_to_linux_cmsg_type(int cmsg_type) { switch (cmsg_type) { case SCM_RIGHTS: return (LINUX_SCM_RIGHTS); case SCM_CREDS: return (LINUX_SCM_CREDENTIALS); } return (-1); } static int linux_to_bsd_msghdr(struct msghdr *bhdr, const struct l_msghdr *lhdr) { if (lhdr->msg_controllen > INT_MAX) return (ENOBUFS); bhdr->msg_name = PTRIN(lhdr->msg_name); bhdr->msg_namelen = lhdr->msg_namelen; bhdr->msg_iov = PTRIN(lhdr->msg_iov); bhdr->msg_iovlen = lhdr->msg_iovlen; bhdr->msg_control = PTRIN(lhdr->msg_control); /* * msg_controllen is skipped since BSD and LINUX control messages * are potentially different sizes (e.g. the cred structure used * by SCM_CREDS is different between the two operating system). * * The caller can set it (if necessary) after converting all the * control messages. */ bhdr->msg_flags = linux_to_bsd_msg_flags(lhdr->msg_flags); return (0); } static int bsd_to_linux_msghdr(const struct msghdr *bhdr, struct l_msghdr *lhdr) { lhdr->msg_name = PTROUT(bhdr->msg_name); lhdr->msg_namelen = bhdr->msg_namelen; lhdr->msg_iov = PTROUT(bhdr->msg_iov); lhdr->msg_iovlen = bhdr->msg_iovlen; lhdr->msg_control = PTROUT(bhdr->msg_control); /* * msg_controllen is skipped since BSD and LINUX control messages * are potentially different sizes (e.g. the cred structure used * by SCM_CREDS is different between the two operating system). * * The caller can set it (if necessary) after converting all the * control messages. */ /* msg_flags skipped */ return (0); } static int linux_set_socket_flags(struct thread *td, int s, int flags) { int error; if (flags & LINUX_SOCK_NONBLOCK) { error = kern_fcntl(td, s, F_SETFL, O_NONBLOCK); if (error) return (error); } if (flags & LINUX_SOCK_CLOEXEC) { error = kern_fcntl(td, s, F_SETFD, FD_CLOEXEC); if (error) return (error); } return (0); } static int linux_sendit(struct thread *td, int s, struct msghdr *mp, int flags, struct mbuf *control, enum uio_seg segflg) { struct sockaddr *to; int error; if (mp->msg_name != NULL) { error = linux_getsockaddr(&to, mp->msg_name, mp->msg_namelen); if (error) return (error); mp->msg_name = to; } else to = NULL; error = kern_sendit(td, s, mp, linux_to_bsd_msg_flags(flags), control, segflg); if (to) free(to, M_SONAME); return (error); } /* Return 0 if IP_HDRINCL is set for the given socket. */ static int linux_check_hdrincl(struct thread *td, int s) { int error, optval, size_val; size_val = sizeof(optval); error = kern_getsockopt(td, s, IPPROTO_IP, IP_HDRINCL, &optval, UIO_SYSSPACE, &size_val); if (error) return (error); return (optval == 0); } struct linux_sendto_args { int s; l_uintptr_t msg; int len; int flags; l_uintptr_t to; int tolen; }; /* * Updated sendto() when IP_HDRINCL is set: * tweak endian-dependent fields in the IP packet. */ static int linux_sendto_hdrincl(struct thread *td, struct linux_sendto_args *linux_args) { /* * linux_ip_copysize defines how many bytes we should copy * from the beginning of the IP packet before we customize it for BSD. * It should include all the fields we modify (ip_len and ip_off). */ #define linux_ip_copysize 8 struct ip *packet; struct msghdr msg; struct iovec aiov[1]; int error; /* Check that the packet isn't too big or too small. */ if (linux_args->len < linux_ip_copysize || linux_args->len > IP_MAXPACKET) return (EINVAL); packet = (struct ip *)malloc(linux_args->len, M_TEMP, M_WAITOK); /* Make kernel copy of the packet to be sent */ if ((error = copyin(PTRIN(linux_args->msg), packet, linux_args->len))) goto goout; /* Convert fields from Linux to BSD raw IP socket format */ packet->ip_len = linux_args->len; packet->ip_off = ntohs(packet->ip_off); /* Prepare the msghdr and iovec structures describing the new packet */ msg.msg_name = PTRIN(linux_args->to); msg.msg_namelen = linux_args->tolen; msg.msg_iov = aiov; msg.msg_iovlen = 1; msg.msg_control = NULL; msg.msg_flags = 0; aiov[0].iov_base = (char *)packet; aiov[0].iov_len = linux_args->len; error = linux_sendit(td, linux_args->s, &msg, linux_args->flags, NULL, UIO_SYSSPACE); goout: free(packet, M_TEMP); return (error); } struct linux_socket_args { int domain; int type; int protocol; }; static int linux_socket(struct thread *td, struct linux_socket_args *args) { struct socket_args /* { int domain; int type; int protocol; } */ bsd_args; int retval_socket, socket_flags; bsd_args.protocol = args->protocol; socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK; if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) return (EINVAL); bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) return (EINVAL); bsd_args.domain = linux_to_bsd_domain(args->domain); if (bsd_args.domain == -1) return (EAFNOSUPPORT); retval_socket = sys_socket(td, &bsd_args); if (retval_socket) return (retval_socket); retval_socket = linux_set_socket_flags(td, td->td_retval[0], socket_flags); if (retval_socket) { (void)kern_close(td, td->td_retval[0]); goto out; } if (bsd_args.type == SOCK_RAW && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0) && bsd_args.domain == PF_INET) { /* It's a raw IP socket: set the IP_HDRINCL option. */ int hdrincl; hdrincl = 1; /* We ignore any error returned by kern_setsockopt() */ kern_setsockopt(td, td->td_retval[0], IPPROTO_IP, IP_HDRINCL, &hdrincl, UIO_SYSSPACE, sizeof(hdrincl)); } #ifdef INET6 /* * Linux AF_INET6 socket has IPV6_V6ONLY setsockopt set to 0 by default * and some apps depend on this. So, set V6ONLY to 0 for Linux apps. * For simplicity we do this unconditionally of the net.inet6.ip6.v6only * sysctl value. */ if (bsd_args.domain == PF_INET6) { int v6only; v6only = 0; /* We ignore any error returned by setsockopt() */ kern_setsockopt(td, td->td_retval[0], IPPROTO_IPV6, IPV6_V6ONLY, &v6only, UIO_SYSSPACE, sizeof(v6only)); } #endif out: return (retval_socket); } struct linux_bind_args { int s; l_uintptr_t name; int namelen; }; static int linux_bind(struct thread *td, struct linux_bind_args *args) { struct sockaddr *sa; int error; error = linux_getsockaddr(&sa, PTRIN(args->name), args->namelen); if (error) return (error); error = kern_bind(td, args->s, sa); free(sa, M_SONAME); if (error == EADDRNOTAVAIL && args->namelen != sizeof(struct sockaddr_in)) return (EINVAL); return (error); } struct linux_connect_args { int s; l_uintptr_t name; int namelen; }; int linux_connect(struct thread *, struct linux_connect_args *); int linux_connect(struct thread *td, struct linux_connect_args *args) { struct socket *so; struct sockaddr *sa; u_int fflag; int error; error = linux_getsockaddr(&sa, (struct osockaddr *)PTRIN(args->name), args->namelen); if (error) return (error); error = kern_connect(td, args->s, sa); free(sa, M_SONAME); if (error != EISCONN) return (error); /* * Linux doesn't return EISCONN the first time it occurs, * when on a non-blocking socket. Instead it returns the * error getsockopt(SOL_SOCKET, SO_ERROR) would return on BSD. * * XXXRW: Instead of using fgetsock(), check that it is a * socket and use the file descriptor reference instead of * creating a new one. */ error = fgetsock(td, args->s, CAP_CONNECT, &so, &fflag); if (error == 0) { error = EISCONN; if (fflag & FNONBLOCK) { SOCK_LOCK(so); if (so->so_emuldata == 0) error = so->so_error; so->so_emuldata = (void *)1; SOCK_UNLOCK(so); } fputsock(so); } return (error); } struct linux_listen_args { int s; int backlog; }; static int linux_listen(struct thread *td, struct linux_listen_args *args) { struct listen_args /* { int s; int backlog; } */ bsd_args; bsd_args.s = args->s; bsd_args.backlog = args->backlog; return (sys_listen(td, &bsd_args)); } static int linux_accept_common(struct thread *td, int s, l_uintptr_t addr, l_uintptr_t namelen, int flags) { struct accept_args /* { int s; struct sockaddr * __restrict name; socklen_t * __restrict anamelen; } */ bsd_args; int error; if (flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) return (EINVAL); bsd_args.s = s; /* XXX: */ bsd_args.name = (struct sockaddr * __restrict)PTRIN(addr); bsd_args.anamelen = PTRIN(namelen);/* XXX */ error = sys_accept(td, &bsd_args); bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.name); if (error) { if (error == EFAULT && namelen != sizeof(struct sockaddr_in)) return (EINVAL); return (error); } /* * linux appears not to copy flags from the parent socket to the * accepted one, so we must clear the flags in the new descriptor * and apply the requested flags. */ error = kern_fcntl(td, td->td_retval[0], F_SETFL, 0); if (error) goto out; error = linux_set_socket_flags(td, td->td_retval[0], flags); if (error) goto out; if (addr) error = linux_sa_put(PTRIN(addr)); out: if (error) { (void)kern_close(td, td->td_retval[0]); td->td_retval[0] = 0; } return (error); } struct linux_accept_args { int s; l_uintptr_t addr; l_uintptr_t namelen; }; static int linux_accept(struct thread *td, struct linux_accept_args *args) { return (linux_accept_common(td, args->s, args->addr, args->namelen, 0)); } struct linux_accept4_args { int s; l_uintptr_t addr; l_uintptr_t namelen; int flags; }; static int linux_accept4(struct thread *td, struct linux_accept4_args *args) { return (linux_accept_common(td, args->s, args->addr, args->namelen, args->flags)); } struct linux_getsockname_args { int s; l_uintptr_t addr; l_uintptr_t namelen; }; static int linux_getsockname(struct thread *td, struct linux_getsockname_args *args) { struct getsockname_args /* { int fdes; struct sockaddr * __restrict asa; socklen_t * __restrict alen; } */ bsd_args; int error; bsd_args.fdes = args->s; /* XXX: */ bsd_args.asa = (struct sockaddr * __restrict)PTRIN(args->addr); bsd_args.alen = PTRIN(args->namelen); /* XXX */ error = sys_getsockname(td, &bsd_args); bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); if (error) return (error); error = linux_sa_put(PTRIN(args->addr)); if (error) return (error); return (0); } struct linux_getpeername_args { int s; l_uintptr_t addr; l_uintptr_t namelen; }; static int linux_getpeername(struct thread *td, struct linux_getpeername_args *args) { struct getpeername_args /* { int fdes; caddr_t asa; int *alen; } */ bsd_args; int error; bsd_args.fdes = args->s; bsd_args.asa = (struct sockaddr *)PTRIN(args->addr); bsd_args.alen = (int *)PTRIN(args->namelen); error = sys_getpeername(td, &bsd_args); bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.asa); if (error) return (error); error = linux_sa_put(PTRIN(args->addr)); if (error) return (error); return (0); } struct linux_socketpair_args { int domain; int type; int protocol; l_uintptr_t rsv; }; static int linux_socketpair(struct thread *td, struct linux_socketpair_args *args) { struct socketpair_args /* { int domain; int type; int protocol; int *rsv; } */ bsd_args; int error, socket_flags; int sv[2]; bsd_args.domain = linux_to_bsd_domain(args->domain); if (bsd_args.domain != PF_LOCAL) return (EAFNOSUPPORT); socket_flags = args->type & ~LINUX_SOCK_TYPE_MASK; if (socket_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) return (EINVAL); bsd_args.type = args->type & LINUX_SOCK_TYPE_MASK; if (bsd_args.type < 0 || bsd_args.type > LINUX_SOCK_MAX) return (EINVAL); if (args->protocol != 0 && args->protocol != PF_UNIX) /* * Use of PF_UNIX as protocol argument is not right, * but Linux does it. * Do not map PF_UNIX as its Linux value is identical * to FreeBSD one. */ return (EPROTONOSUPPORT); else bsd_args.protocol = 0; bsd_args.rsv = (int *)PTRIN(args->rsv); error = kern_socketpair(td, bsd_args.domain, bsd_args.type, bsd_args.protocol, sv); if (error) return (error); error = linux_set_socket_flags(td, sv[0], socket_flags); if (error) goto out; error = linux_set_socket_flags(td, sv[1], socket_flags); if (error) goto out; error = copyout(sv, bsd_args.rsv, 2 * sizeof(int)); out: if (error) { (void)kern_close(td, sv[0]); (void)kern_close(td, sv[1]); } return (error); } struct linux_send_args { int s; l_uintptr_t msg; int len; int flags; }; static int linux_send(struct thread *td, struct linux_send_args *args) { struct sendto_args /* { int s; caddr_t buf; int len; int flags; caddr_t to; int tolen; } */ bsd_args; bsd_args.s = args->s; bsd_args.buf = (caddr_t)PTRIN(args->msg); bsd_args.len = args->len; bsd_args.flags = args->flags; bsd_args.to = NULL; bsd_args.tolen = 0; return sys_sendto(td, &bsd_args); } struct linux_recv_args { int s; l_uintptr_t msg; int len; int flags; }; static int linux_recv(struct thread *td, struct linux_recv_args *args) { struct recvfrom_args /* { int s; caddr_t buf; int len; int flags; struct sockaddr *from; socklen_t fromlenaddr; } */ bsd_args; bsd_args.s = args->s; bsd_args.buf = (caddr_t)PTRIN(args->msg); bsd_args.len = args->len; bsd_args.flags = linux_to_bsd_msg_flags(args->flags); bsd_args.from = NULL; bsd_args.fromlenaddr = 0; return (sys_recvfrom(td, &bsd_args)); } static int linux_sendto(struct thread *td, struct linux_sendto_args *args) { struct msghdr msg; struct iovec aiov; int error; if (linux_check_hdrincl(td, args->s) == 0) /* IP_HDRINCL set, tweak the packet before sending */ return (linux_sendto_hdrincl(td, args)); msg.msg_name = PTRIN(args->to); msg.msg_namelen = args->tolen; msg.msg_iov = &aiov; msg.msg_iovlen = 1; msg.msg_control = NULL; msg.msg_flags = 0; aiov.iov_base = PTRIN(args->msg); aiov.iov_len = args->len; error = linux_sendit(td, args->s, &msg, args->flags, NULL, UIO_USERSPACE); return (error); } struct linux_recvfrom_args { int s; l_uintptr_t buf; int len; int flags; l_uintptr_t from; l_uintptr_t fromlen; }; static int linux_recvfrom(struct thread *td, struct linux_recvfrom_args *args) { struct recvfrom_args /* { int s; caddr_t buf; size_t len; int flags; struct sockaddr * __restrict from; socklen_t * __restrict fromlenaddr; } */ bsd_args; size_t len; int error; if ((error = copyin(PTRIN(args->fromlen), &len, sizeof(size_t)))) return (error); bsd_args.s = args->s; bsd_args.buf = PTRIN(args->buf); bsd_args.len = args->len; bsd_args.flags = linux_to_bsd_msg_flags(args->flags); /* XXX: */ bsd_args.from = (struct sockaddr * __restrict)PTRIN(args->from); bsd_args.fromlenaddr = PTRIN(args->fromlen);/* XXX */ linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.from, len); error = sys_recvfrom(td, &bsd_args); bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.from); if (error) return (error); if (args->from) { error = linux_sa_put((struct osockaddr *) PTRIN(args->from)); if (error) return (error); } return (0); } struct linux_sendmsg_args { int s; l_uintptr_t msg; int flags; }; static int linux_sendmsg(struct thread *td, struct linux_sendmsg_args *args) { struct cmsghdr *cmsg; struct cmsgcred cmcred; struct mbuf *control; struct msghdr msg; struct l_cmsghdr linux_cmsg; struct l_cmsghdr *ptr_cmsg; struct l_msghdr linux_msg; struct iovec *iov; socklen_t datalen; struct sockaddr *sa; sa_family_t sa_family; void *data; int error; error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg)); if (error) return (error); /* * Some Linux applications (ping) define a non-NULL control data * pointer, but a msg_controllen of 0, which is not allowed in the * FreeBSD system call interface. NULL the msg_control pointer in * order to handle this case. This should be checked, but allows the * Linux ping to work. */ if (PTRIN(linux_msg.msg_control) != NULL && linux_msg.msg_controllen == 0) linux_msg.msg_control = PTROUT(NULL); error = linux_to_bsd_msghdr(&msg, &linux_msg); if (error) return (error); #ifdef COMPAT_LINUX32 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, &iov, EMSGSIZE); #else error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); #endif if (error) return (error); control = NULL; cmsg = NULL; if ((ptr_cmsg = LINUX_CMSG_FIRSTHDR(&linux_msg)) != NULL) { error = kern_getsockname(td, args->s, &sa, &datalen); if (error) goto bad; sa_family = sa->sa_family; free(sa, M_SONAME); error = ENOBUFS; cmsg = malloc(CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO); control = m_get(M_WAITOK, MT_CONTROL); if (control == NULL) goto bad; do { error = copyin(ptr_cmsg, &linux_cmsg, sizeof(struct l_cmsghdr)); if (error) goto bad; error = EINVAL; if (linux_cmsg.cmsg_len < sizeof(struct l_cmsghdr)) goto bad; /* * Now we support only SCM_RIGHTS and SCM_CRED, * so return EINVAL in any other cmsg_type */ cmsg->cmsg_type = linux_to_bsd_cmsg_type(linux_cmsg.cmsg_type); cmsg->cmsg_level = linux_to_bsd_sockopt_level(linux_cmsg.cmsg_level); if (cmsg->cmsg_type == -1 || cmsg->cmsg_level != SOL_SOCKET) goto bad; /* * Some applications (e.g. pulseaudio) attempt to * send ancillary data even if the underlying protocol * doesn't support it which is not allowed in the * FreeBSD system call interface. */ if (sa_family != AF_UNIX) continue; data = LINUX_CMSG_DATA(ptr_cmsg); datalen = linux_cmsg.cmsg_len - L_CMSG_HDRSZ; switch (cmsg->cmsg_type) { case SCM_RIGHTS: break; case SCM_CREDS: data = &cmcred; datalen = sizeof(cmcred); /* * The lower levels will fill in the structure */ bzero(data, datalen); break; } cmsg->cmsg_len = CMSG_LEN(datalen); error = ENOBUFS; if (!m_append(control, CMSG_HDRSZ, (c_caddr_t)cmsg)) goto bad; if (!m_append(control, datalen, (c_caddr_t)data)) goto bad; } while ((ptr_cmsg = LINUX_CMSG_NXTHDR(&linux_msg, ptr_cmsg))); if (m_length(control, NULL) == 0) { m_freem(control); control = NULL; } } msg.msg_iov = iov; msg.msg_flags = 0; error = linux_sendit(td, args->s, &msg, args->flags, control, UIO_USERSPACE); bad: free(iov, M_IOV); if (cmsg) free(cmsg, M_TEMP); return (error); } struct linux_recvmsg_args { int s; l_uintptr_t msg; int flags; }; static int linux_recvmsg(struct thread *td, struct linux_recvmsg_args *args) { struct cmsghdr *cm; struct cmsgcred *cmcred; struct msghdr msg; struct l_cmsghdr *linux_cmsg = NULL; struct l_ucred linux_ucred; socklen_t datalen, outlen; struct l_msghdr linux_msg; struct iovec *iov, *uiov; struct mbuf *control = NULL; struct mbuf **controlp; caddr_t outbuf; void *data; int error, i, fd, fds, *fdp; error = copyin(PTRIN(args->msg), &linux_msg, sizeof(linux_msg)); if (error) return (error); error = linux_to_bsd_msghdr(&msg, &linux_msg); if (error) return (error); #ifdef COMPAT_LINUX32 error = linux32_copyiniov(PTRIN(msg.msg_iov), msg.msg_iovlen, &iov, EMSGSIZE); #else error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE); #endif if (error) return (error); if (msg.msg_name) { error = linux_to_bsd_sockaddr((struct sockaddr *)msg.msg_name, msg.msg_namelen); if (error) goto bad; } uiov = msg.msg_iov; msg.msg_iov = iov; controlp = (msg.msg_control != NULL) ? &control : NULL; error = kern_recvit(td, args->s, &msg, UIO_USERSPACE, controlp); msg.msg_iov = uiov; if (error) goto bad; error = bsd_to_linux_msghdr(&msg, &linux_msg); if (error) goto bad; if (linux_msg.msg_name) { error = bsd_to_linux_sockaddr((struct sockaddr *) PTRIN(linux_msg.msg_name)); if (error) goto bad; } if (linux_msg.msg_name && linux_msg.msg_namelen > 2) { error = linux_sa_put(PTRIN(linux_msg.msg_name)); if (error) goto bad; } outbuf = PTRIN(linux_msg.msg_control); outlen = 0; if (control) { linux_cmsg = malloc(L_CMSG_HDRSZ, M_TEMP, M_WAITOK | M_ZERO); msg.msg_control = mtod(control, struct cmsghdr *); msg.msg_controllen = control->m_len; cm = CMSG_FIRSTHDR(&msg); while (cm != NULL) { linux_cmsg->cmsg_type = bsd_to_linux_cmsg_type(cm->cmsg_type); linux_cmsg->cmsg_level = bsd_to_linux_sockopt_level(cm->cmsg_level); if (linux_cmsg->cmsg_type == -1 || cm->cmsg_level != SOL_SOCKET) { error = EINVAL; goto bad; } data = CMSG_DATA(cm); datalen = (caddr_t)cm + cm->cmsg_len - (caddr_t)data; switch (cm->cmsg_type) { case SCM_RIGHTS: if (args->flags & LINUX_MSG_CMSG_CLOEXEC) { fds = datalen / sizeof(int); fdp = data; for (i = 0; i < fds; i++) { fd = *fdp++; (void)kern_fcntl(td, fd, F_SETFD, FD_CLOEXEC); } } break; case SCM_CREDS: /* * Currently LOCAL_CREDS is never in * effect for Linux so no need to worry * about sockcred */ if (datalen != sizeof(*cmcred)) { error = EMSGSIZE; goto bad; } cmcred = (struct cmsgcred *)data; bzero(&linux_ucred, sizeof(linux_ucred)); linux_ucred.pid = cmcred->cmcred_pid; linux_ucred.uid = cmcred->cmcred_uid; linux_ucred.gid = cmcred->cmcred_gid; data = &linux_ucred; datalen = sizeof(linux_ucred); break; } if (outlen + LINUX_CMSG_LEN(datalen) > linux_msg.msg_controllen) { if (outlen == 0) { error = EMSGSIZE; goto bad; } else { linux_msg.msg_flags |= LINUX_MSG_CTRUNC; goto out; } } linux_cmsg->cmsg_len = LINUX_CMSG_LEN(datalen); error = copyout(linux_cmsg, outbuf, L_CMSG_HDRSZ); if (error) goto bad; outbuf += L_CMSG_HDRSZ; error = copyout(data, outbuf, datalen); if (error) goto bad; outbuf += LINUX_CMSG_ALIGN(datalen); outlen += LINUX_CMSG_LEN(datalen); cm = CMSG_NXTHDR(&msg, cm); } } out: linux_msg.msg_controllen = outlen; error = copyout(&linux_msg, PTRIN(args->msg), sizeof(linux_msg)); bad: free(iov, M_IOV); if (control != NULL) m_freem(control); if (linux_cmsg != NULL) free(linux_cmsg, M_TEMP); return (error); } struct linux_shutdown_args { int s; int how; }; static int linux_shutdown(struct thread *td, struct linux_shutdown_args *args) { struct shutdown_args /* { int s; int how; } */ bsd_args; bsd_args.s = args->s; bsd_args.how = args->how; return (sys_shutdown(td, &bsd_args)); } struct linux_setsockopt_args { int s; int level; int optname; l_uintptr_t optval; int optlen; }; static int linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args) { struct setsockopt_args /* { int s; int level; int name; caddr_t val; int valsize; } */ bsd_args; l_timeval linux_tv; struct timeval tv; int error, name; bsd_args.s = args->s; bsd_args.level = linux_to_bsd_sockopt_level(args->level); switch (bsd_args.level) { case SOL_SOCKET: name = linux_to_bsd_so_sockopt(args->optname); switch (name) { case SO_RCVTIMEO: /* FALLTHROUGH */ case SO_SNDTIMEO: error = copyin(PTRIN(args->optval), &linux_tv, sizeof(linux_tv)); if (error) return (error); tv.tv_sec = linux_tv.tv_sec; tv.tv_usec = linux_tv.tv_usec; return (kern_setsockopt(td, args->s, bsd_args.level, name, &tv, UIO_SYSSPACE, sizeof(tv))); /* NOTREACHED */ break; default: break; } break; case IPPROTO_IP: name = linux_to_bsd_ip_sockopt(args->optname); break; case IPPROTO_TCP: name = linux_to_bsd_tcp_sockopt(args->optname); break; default: name = -1; break; } if (name == -1) return (ENOPROTOOPT); bsd_args.name = name; bsd_args.val = PTRIN(args->optval); bsd_args.valsize = args->optlen; if (name == IPV6_NEXTHOP) { linux_to_bsd_sockaddr((struct sockaddr *)bsd_args.val, bsd_args.valsize); error = sys_setsockopt(td, &bsd_args); bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); } else error = sys_setsockopt(td, &bsd_args); return (error); } struct linux_getsockopt_args { int s; int level; int optname; l_uintptr_t optval; l_uintptr_t optlen; }; static int linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args) { struct getsockopt_args /* { int s; int level; int name; caddr_t val; int *avalsize; } */ bsd_args; l_timeval linux_tv; struct timeval tv; socklen_t tv_len, xulen; struct xucred xu; struct l_ucred lxu; int error, name; bsd_args.s = args->s; bsd_args.level = linux_to_bsd_sockopt_level(args->level); switch (bsd_args.level) { case SOL_SOCKET: name = linux_to_bsd_so_sockopt(args->optname); switch (name) { case SO_RCVTIMEO: /* FALLTHROUGH */ case SO_SNDTIMEO: tv_len = sizeof(tv); error = kern_getsockopt(td, args->s, bsd_args.level, name, &tv, UIO_SYSSPACE, &tv_len); if (error) return (error); linux_tv.tv_sec = tv.tv_sec; linux_tv.tv_usec = tv.tv_usec; return (copyout(&linux_tv, PTRIN(args->optval), sizeof(linux_tv))); /* NOTREACHED */ break; case LOCAL_PEERCRED: if (args->optlen != sizeof(lxu)) return (EINVAL); xulen = sizeof(xu); error = kern_getsockopt(td, args->s, bsd_args.level, name, &xu, UIO_SYSSPACE, &xulen); if (error) return (error); /* * XXX Use 0 for pid as the FreeBSD does not cache peer pid. */ lxu.pid = 0; lxu.uid = xu.cr_uid; lxu.gid = xu.cr_gid; return (copyout(&lxu, PTRIN(args->optval), sizeof(lxu))); /* NOTREACHED */ break; default: break; } break; case IPPROTO_IP: name = linux_to_bsd_ip_sockopt(args->optname); break; case IPPROTO_TCP: name = linux_to_bsd_tcp_sockopt(args->optname); break; default: name = -1; break; } if (name == -1) return (EINVAL); bsd_args.name = name; bsd_args.val = PTRIN(args->optval); bsd_args.avalsize = PTRIN(args->optlen); if (name == IPV6_NEXTHOP) { error = sys_getsockopt(td, &bsd_args); bsd_to_linux_sockaddr((struct sockaddr *)bsd_args.val); } else error = sys_getsockopt(td, &bsd_args); return (error); } /* Argument list sizes for linux_socketcall */ #define LINUX_AL(x) ((x) * sizeof(l_ulong)) static const unsigned char lxs_args[] = { LINUX_AL(0) /* unused*/, LINUX_AL(3) /* socket */, LINUX_AL(3) /* bind */, LINUX_AL(3) /* connect */, LINUX_AL(2) /* listen */, LINUX_AL(3) /* accept */, LINUX_AL(3) /* getsockname */, LINUX_AL(3) /* getpeername */, LINUX_AL(4) /* socketpair */, LINUX_AL(4) /* send */, LINUX_AL(4) /* recv */, LINUX_AL(6) /* sendto */, LINUX_AL(6) /* recvfrom */, LINUX_AL(2) /* shutdown */, LINUX_AL(5) /* setsockopt */, LINUX_AL(5) /* getsockopt */, LINUX_AL(3) /* sendmsg */, LINUX_AL(3) /* recvmsg */, LINUX_AL(4) /* accept4 */ }; #define LINUX_AL_SIZE sizeof(lxs_args) / sizeof(lxs_args[0]) - 1 int linux_socketcall(struct thread *td, struct linux_socketcall_args *args) { l_ulong a[6]; void *arg; int error; if (args->what < LINUX_SOCKET || args->what > LINUX_AL_SIZE) return (EINVAL); error = copyin(PTRIN(args->args), a, lxs_args[args->what]); if (error) return (error); arg = a; switch (args->what) { case LINUX_SOCKET: return (linux_socket(td, arg)); case LINUX_BIND: return (linux_bind(td, arg)); case LINUX_CONNECT: return (linux_connect(td, arg)); case LINUX_LISTEN: return (linux_listen(td, arg)); case LINUX_ACCEPT: return (linux_accept(td, arg)); case LINUX_GETSOCKNAME: return (linux_getsockname(td, arg)); case LINUX_GETPEERNAME: return (linux_getpeername(td, arg)); case LINUX_SOCKETPAIR: return (linux_socketpair(td, arg)); case LINUX_SEND: return (linux_send(td, arg)); case LINUX_RECV: return (linux_recv(td, arg)); case LINUX_SENDTO: return (linux_sendto(td, arg)); case LINUX_RECVFROM: return (linux_recvfrom(td, arg)); case LINUX_SHUTDOWN: return (linux_shutdown(td, arg)); case LINUX_SETSOCKOPT: return (linux_setsockopt(td, arg)); case LINUX_GETSOCKOPT: return (linux_getsockopt(td, arg)); case LINUX_SENDMSG: return (linux_sendmsg(td, arg)); case LINUX_RECVMSG: return (linux_recvmsg(td, arg)); case LINUX_ACCEPT4: return (linux_accept4(td, arg)); } uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); return (ENOSYS); }