/* $OpenBSD: linux_socket.c,v 1.46 2012/06/26 10:18:08 pirofti Exp $ */ /* $NetBSD: linux_socket.c,v 1.14 1996/04/05 00:01:50 christos Exp $ */ /* * Copyright (c) 1995 Frank van der Linden * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed for the NetBSD Project * by Frank van der Linden * 4. 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * All the calls in this file are entered via one common system * call in Linux, represented here by linux_socketcall() * Arguments for the various calls are on the user stack. A pointer * to them is the only thing that is passed. It is up to the various * calls to copy them in themselves. To make it look better, they * are copied to structures. */ static int linux_to_bsd_domain (int); static int bsd_to_linux_domain(int); static int linux_to_bsd_msg_flags(int); int linux_socket(struct proc *, void *, register_t *); int linux_bind(struct proc *, void *, register_t *); int linux_connect(struct proc *, void *, register_t *); int linux_listen(struct proc *, void *, register_t *); int linux_accept(struct proc *, void *, register_t *); int linux_getsockname(struct proc *, void *, register_t *); int linux_getpeername(struct proc *, void *, register_t *); int linux_socketpair(struct proc *, void *, register_t *); int linux_send(struct proc *, void *, register_t *); int linux_recv(struct proc *, void *, register_t *); int linux_sendto(struct proc *, void *, register_t *); int linux_recvfrom(struct proc *, void *, register_t *); int linux_shutdown(struct proc *, void *, register_t *); int linux_to_bsd_sopt_level(int); int linux_to_bsd_so_sockopt(int); int linux_to_bsd_ip_sockopt(int); int linux_to_bsd_tcp_sockopt(int); int linux_to_bsd_udp_sockopt(int); int linux_setsockopt(struct proc *, void *, register_t *); int linux_getsockopt(struct proc *, void *, register_t *); int linux_recvmsg(struct proc *, void *, register_t *); int linux_sendmsg(struct proc *, void *, register_t *); int linux_check_hdrincl(struct proc *, int, register_t *, caddr_t *); int linux_sendto_hdrincl(struct proc *, struct sys_sendto_args *, register_t *, caddr_t *); int linux_sa_get(struct proc *, caddr_t *, struct sockaddr **, const struct osockaddr *, int *); int linux_sa_put(struct osockaddr *); static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { AF_UNSPEC, AF_UNIX, AF_INET, -1, /* LINUX_AF_AX25 */ -1, /* IPX */ -1 /* APPLETALK */ -1, /* LINUX_AF_NETROM */ -1, /* LINUX_AF_BRIDGE */ -1, /* LINUX_AF_ATMPVC */ -1, /* LINUX_AF_X25 */ AF_INET6, -1, /* LINUX_AF_ROSE */ AF_DECnet, -1, /* LINUX_AF_NETBEUI */ -1, /* LINUX_AF_SECURITY */ -1, /* pseudo_AF_KEY */ AF_ROUTE, /* LINUX_AF_NETLINK */ -1, /* LINUX_AF_PACKET */ -1, /* LINUX_AF_ASH */ -1, /* LINUX_AF_ECONET */ -1, /* LINUX_AF_ATMSVC */ AF_SNA, /* rest up to LINUX_AF_MAX-1 is not allocated */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, }; static const int bsd_to_linux_domain_[AF_MAX] = { LINUX_AF_UNSPEC, LINUX_AF_UNIX, LINUX_AF_INET, -1, /* AF_IMPLINK */ -1, /* AF_PUP */ -1, /* AF_CHAOS */ -1, /* AF_NS */ -1, /* AF_ISO */ -1, /* AF_ECMA */ -1, /* AF_DATAKIT */ -1, /* AF_CCITT */ -1, /* LINUX_AF_SNA */ -1, /* LINUX_AF_DECnet */ -1, /* AF_DLI */ -1, /* AF_LAT */ -1, /* AF_HYLINK */ LINUX_AF_APPLETALK, -1, /* LINUX_AF_NETLINK */ -1, /* AF_LINK */ -1, /* AF_XTP */ -1, /* AF_COIP */ -1, /* AF_CNT */ -1, /* pseudo_AF_RTIP */ LINUX_AF_IPX, LINUX_AF_INET6, -1, /* pseudo_AF_PIP */ -1, /* AF_ISDN */ -1, /* AF_NATM */ -1, /* AF_ARP */ -1, /* LINUX_pseudo_AF_KEY */ -1, /* pseudo_AF_HDRCMPLT */ }; /* * Convert between Linux and BSD socket domain values */ static int linux_to_bsd_domain(ldom) int ldom; { if (ldom < 0 || ldom >= LINUX_AF_MAX) return (-1); return linux_to_bsd_domain_[ldom]; } /* * Convert between BSD and Linux socket domain values */ static int bsd_to_linux_domain(bdom) int bdom; { if (bdom < 0 || bdom >= AF_MAX) return (-1); return bsd_to_linux_domain_[bdom]; } /* * Convert between Linux and BSD MSG_XXX flags */ static int linux_to_bsd_msg_flags(int lflags) { int flags = 0; if (lflags & LINUX_MSG_OOB) flags |= MSG_OOB; if (lflags & LINUX_MSG_PEEK) flags |= MSG_PEEK; if (lflags & LINUX_MSG_DONTROUTE) flags |= MSG_DONTROUTE; if (lflags & LINUX_MSG_DONTWAIT) flags |= MSG_DONTWAIT; if (lflags & LINUX_MSG_WAITALL) flags |= MSG_WAITALL; if (lflags & LINUX_MSG_NOSIGNAL) flags |= MSG_NOSIGNAL; return (flags); } int linux_socket(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_socket_args /* { syscallarg(int) domain; syscallarg(int) type; syscallarg(int) protocol; } */ *uap = v; struct linux_socket_args lsa; struct sys_socket_args bsa; struct sys_fcntl_args bfa; struct sys_close_args bca; int error, type_flags, fd; if ((error = copyin((caddr_t) uap, (caddr_t) &lsa, sizeof lsa))) return error; type_flags = lsa.type & ~LINUX_SOCKET_TYPE_MASK; if (type_flags & ~(LINUX_SOCK_CLOEXEC | LINUX_SOCK_NONBLOCK)) return EINVAL; SCARG(&bsa, protocol) = lsa.protocol; SCARG(&bsa, type) = lsa.type & LINUX_SOCKET_TYPE_MASK; SCARG(&bsa, domain) = linux_to_bsd_domain(lsa.domain); if (SCARG(&bsa, domain) == -1) return EINVAL; error = sys_socket(p, &bsa, retval); if (error) return error; fd = SCARG(&bfa, fd) = retval[0]; if (type_flags & LINUX_SOCK_NONBLOCK) { SCARG(&bfa, cmd) = F_SETFL; SCARG(&bfa, arg) = (void *)O_NONBLOCK; error = sys_fcntl(p, &bfa, retval); if (error) goto err; } if (type_flags & LINUX_SOCK_CLOEXEC) { SCARG(&bfa, cmd) = F_SETFD; SCARG(&bfa, arg) = (void *)FD_CLOEXEC; error = sys_fcntl(p, &bfa, retval); if (error) goto err; } retval[0] = fd; return error; err: SCARG(&bca, fd) = fd; sys_close(p, &bca, retval); retval[0] = -1; return error; } int linux_bind(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_bind_args /* { syscallarg(int) s; syscallarg(struct sockaddr *) name; syscallarg(int) namelen; } */ *uap = v; struct linux_bind_args lba; struct sys_bind_args bba; int error; int namlen; if ((error = copyin((caddr_t) uap, (caddr_t) &lba, sizeof lba))) return error; SCARG(&bba, s) = lba.s; namlen = lba.namelen; if (lba.name) { struct sockaddr *sa; caddr_t sg = stackgap_init(p->p_emul); error = linux_sa_get(p, &sg, &sa, lba.name, &namlen); if (error) return (error); SCARG(&bba, name) = sa; } else SCARG(&bba, name) = NULL; SCARG(&bba, namelen) = namlen; return sys_bind(p, &bba, retval); } int linux_connect(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_connect_args /* { syscallarg(int) s; syscallarg(struct osockaddr *) name; syscallarg(int) namelen; } */ *uap = v; struct linux_connect_args lca; struct sys_connect_args bca; struct sockaddr *sa; caddr_t sg = stackgap_init(p->p_emul); int namlen; int error; if ((error = copyin((caddr_t) uap, (caddr_t) &lca, sizeof lca))) return error; namlen = lca.namelen; error = linux_sa_get(p, &sg, &sa, lca.name, &namlen); if (error) return (error); SCARG(&bca, s) = lca.s; SCARG(&bca, name) = sa; SCARG(&bca, namelen) = (unsigned int)namlen; error = sys_connect(p, &bca, retval); if (error == EISCONN) { struct sys_getsockopt_args bga; #if 0 struct sys_fcntl_args fca; #endif void *status, *statusl; int stat, statl = sizeof stat; #if 0 SCARG(&fca, fd) = lca.s; SCARG(&fca, cmd) = F_GETFL; SCARG(&fca, arg) = 0; if (sys_fcntl(p, &fca, retval) == -1 || (*retval & O_NONBLOCK) == 0) return error; #endif status = stackgap_alloc(&sg, sizeof stat); statusl = stackgap_alloc(&sg, sizeof statl); if ((error = copyout(&statl, statusl, sizeof statl))) return error; SCARG(&bga, s) = lca.s; SCARG(&bga, level) = SOL_SOCKET; SCARG(&bga, name) = SO_ERROR; SCARG(&bga, val) = status; SCARG(&bga, avalsize) = statusl; error = sys_getsockopt(p, &bga, retval); if (error) return error; if ((error = copyin(status, &stat, sizeof stat))) return error; return stat; } return error; } int linux_listen(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_listen_args /* { syscallarg(int) s; syscallarg(int) backlog; } */ *uap = v; struct linux_listen_args lla; struct sys_listen_args bla; int error; if ((error = copyin((caddr_t) uap, (caddr_t) &lla, sizeof lla))) return error; SCARG(&bla, s) = lla.s; SCARG(&bla, backlog) = lla.backlog; return sys_listen(p, &bla, retval); } int compat_sys_accept(struct proc *p, void *v, register_t *retval); int compat_sys_accept(struct proc *p, void *v, register_t *retval) { struct sys_accept_args /* { syscallarg(int) s; syscallarg(caddr_t) name; syscallarg(int *) anamelen; } */ *uap = v; int error; if ((error = sys_accept(p, uap, retval)) != 0) return error; if (SCARG(uap, name)) { struct sockaddr sa; if ((error = copyin(SCARG(uap, name), &sa, sizeof(sa))) != 0) return error; ((struct osockaddr*) &sa)->sa_family = sa.sa_family; if ((error = copyout(&sa, SCARG(uap, name), sizeof(sa))) != 0) return error; } return 0; } int linux_accept(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_accept_args /* { syscallarg(int) s; syscallarg(struct sockaddr *) addr; syscallarg(int *) namelen; } */ *uap = v; struct linux_accept_args laa; struct sys_accept_args baa; struct sys_fcntl_args fca; int error; if ((error = copyin((caddr_t) uap, (caddr_t) &laa, sizeof laa))) return error; SCARG(&baa, s) = laa.s; SCARG(&baa, name) = laa.addr; SCARG(&baa, anamelen) = laa.namelen; error = compat_sys_accept(p, &baa, retval); if (error) 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. * Ignore any errors, because we already have an open fd. */ SCARG(&fca, fd) = *retval; SCARG(&fca, cmd) = F_SETFL; SCARG(&fca, arg) = 0; (void)sys_fcntl(p, &fca, retval); *retval = SCARG(&fca, fd); return (0); } int linux_getsockname(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_getsockname_args /* { syscallarg(int) s; syscallarg(caddr_t) addr; syscallarg(int *) namelen; } */ *uap = v; struct linux_getsockname_args lga; struct sys_getsockname_args bga; int error; if ((error = copyin((caddr_t) uap, (caddr_t) &lga, sizeof lga))) return error; SCARG(&bga, fdes) = lga.s; SCARG(&bga, asa) = (struct sockaddr *) lga.addr; SCARG(&bga, alen) = lga.namelen; error = sys_getsockname(p, &bga, retval); if (error) return (error); if ((error = linux_sa_put((struct osockaddr *)lga.addr))) return (error); return (0); } int linux_getpeername(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_getpeername_args /* { syscallarg(int) s; syscallarg(struct sockaddr *) addr; syscallarg(int *) namelen; } */ *uap = v; struct linux_getpeername_args lga; struct sys_getpeername_args bga; int error; if ((error = copyin((caddr_t) uap, (caddr_t) &lga, sizeof lga))) return error; SCARG(&bga, fdes) = lga.s; SCARG(&bga, asa) = (struct sockaddr *) lga.addr; SCARG(&bga, alen) = lga.namelen; error = sys_getpeername(p, &bga, retval); if (error) return (error); if ((error = linux_sa_put((struct osockaddr *)lga.addr))) return (error); return (0); } int linux_socketpair(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_socketpair_args /* { syscallarg(int) domain; syscallarg(int) type; syscallarg(int) protocol; syscallarg(int *) rsv; } */ *uap = v; struct linux_socketpair_args lsa; struct sys_socketpair_args bsa; int error; if ((error = copyin((caddr_t) uap, &lsa, sizeof lsa))) return error; SCARG(&bsa, domain) = linux_to_bsd_domain(lsa.domain); if (SCARG(&bsa, domain) == -1) return EINVAL; SCARG(&bsa, type) = lsa.type; SCARG(&bsa, protocol) = lsa.protocol; SCARG(&bsa, rsv) = lsa.rsv; return sys_socketpair(p, &bsa, retval); } int compat_sys_send(struct proc *, void *, register_t *); struct compat_sys_send_args { syscallarg(int) s; syscallarg(caddr_t) buf; syscallarg(int) len; syscallarg(int) flags; }; int compat_sys_send(p, v, retval) struct proc *p; void *v; register_t *retval; { struct compat_sys_send_args *uap = v; struct msghdr msg; struct iovec aiov; msg.msg_name = 0; msg.msg_namelen = 0; 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 = 0; return (sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval)); } int linux_send(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_send_args /* { syscallarg(int) s; syscallarg(void *) msg; syscallarg(int) len; syscallarg(int) flags; } */ *uap = v; struct compat_sys_send_args bsa; struct linux_send_args lsa; int error; if ((error = copyin((caddr_t) uap, (caddr_t) &lsa, sizeof lsa))) return error; SCARG(&bsa, s) = lsa.s; SCARG(&bsa, buf) = lsa.msg; SCARG(&bsa, len) = lsa.len; SCARG(&bsa, flags) = linux_to_bsd_msg_flags(lsa.flags); return compat_sys_send(p, &bsa, retval); } struct compat_sys_recv_args { syscallarg(int) s; syscallarg(caddr_t) buf; syscallarg(int) len; syscallarg(int) flags; }; int compat_sys_recv(struct proc *p, void *v, register_t *retval); int compat_sys_recv(p, v, retval) struct proc *p; void *v; register_t *retval; { struct compat_sys_recv_args *uap = v; struct msghdr msg; struct iovec aiov; msg.msg_name = 0; msg.msg_namelen = 0; 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)0, retval)); } int linux_recv(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_recv_args /* { syscallarg(int) s; syscallarg(void *) msg; syscallarg(int) len; syscallarg(int) flags; } */ *uap = v; struct linux_recv_args lra; struct compat_sys_recv_args bra; int error; if ((error = copyin((caddr_t) uap, (caddr_t) &lra, sizeof lra))) return error; SCARG(&bra, s) = lra.s; SCARG(&bra, buf) = lra.msg; SCARG(&bra, len) = lra.len; SCARG(&bra, flags) = linux_to_bsd_msg_flags(lra.flags); return compat_sys_recv(p, &bra, retval); } int linux_check_hdrincl(p, fd, retval, sgp) struct proc *p; int fd; register_t *retval; caddr_t *sgp; { struct sys_getsockopt_args /* { int s; int level; int name; caddr_t val; int *avalsize; } */ gsa; int error; caddr_t val; int *valsize; int size_val = sizeof val; int optval; val = stackgap_alloc(sgp, sizeof(optval)); valsize = stackgap_alloc(sgp, sizeof(size_val)); if ((error = copyout(&size_val, valsize, sizeof(size_val)))) return (error); SCARG(&gsa, s) = fd; SCARG(&gsa, level) = IPPROTO_IP; SCARG(&gsa, name) = IP_HDRINCL; SCARG(&gsa, val) = val; SCARG(&gsa, avalsize) = valsize; if ((error = sys_getsockopt(p, &gsa, retval))) return (error); if ((error = copyin(val, &optval, sizeof(optval)))) return (error); return (optval == 0); } /* * 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) * and be as small as possible to minimize copying overhead. */ #define linux_ip_copysize 8 int linux_sendto_hdrincl(p, bsa, retval, sgp) struct proc *p; struct sys_sendto_args *bsa; register_t *retval; caddr_t *sgp; { struct sys_sendmsg_args ssa; struct ip *packet, rpacket; struct msghdr *msg, rmsg; struct iovec *iov, riov[2]; int error; /* Check the packet isn't too small before we mess with it */ if (SCARG(bsa, len) < linux_ip_copysize) return EINVAL; /* * Tweaking the user buffer in place would be bad manners. * We create a corrected IP header with just the needed length, * then use an iovec to glue it to the rest of the user packet * when calling sendmsg(). */ packet = (struct ip *)stackgap_alloc(sgp, linux_ip_copysize); msg = (struct msghdr *)stackgap_alloc(sgp, sizeof(*msg)); iov = (struct iovec *)stackgap_alloc(sgp, sizeof(*iov)*2); /* Make a copy of the beginning of the packet to be sent */ if ((error = copyin(SCARG(bsa, buf), (caddr_t)&rpacket, linux_ip_copysize))) return error; /* Convert fields from Linux to BSD raw IP socket format */ rpacket.ip_len = SCARG(bsa, len); error = copyout(&rpacket, packet, linux_ip_copysize); if (error) return (error); riov[0].iov_base = (char *)packet; riov[0].iov_len = linux_ip_copysize; riov[1].iov_base = (caddr_t)SCARG(bsa, buf) + linux_ip_copysize; riov[1].iov_len = SCARG(bsa, len) - linux_ip_copysize; error = copyout(&riov[0], iov, sizeof(riov)); if (error) return (error); /* Prepare the msghdr and iovec structures describing the new packet */ rmsg.msg_name = (void *)SCARG(bsa, to); rmsg.msg_namelen = SCARG(bsa, tolen); rmsg.msg_iov = iov; rmsg.msg_iovlen = 2; rmsg.msg_control = NULL; rmsg.msg_controllen = 0; rmsg.msg_flags = 0; error = copyout(&riov[0], iov, sizeof(riov)); if (error) return (error); SCARG(&ssa, s) = SCARG(bsa, s); SCARG(&ssa, msg) = msg; SCARG(&ssa, flags) = SCARG(bsa, flags); return sys_sendmsg(p, &ssa, retval); } int linux_sendto(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sendto_args /* { syscallarg(int) s; syscallarg(void *) msg; syscallarg(int) len; syscallarg(int) flags; syscallarg(osockaddr *) to; syscallarg(int) tolen; } */ *uap = v; struct linux_sendto_args lsa; struct sys_sendto_args bsa; int error; int tolen; caddr_t sg = stackgap_init(p->p_emul); if ((error = copyin((caddr_t) uap, (caddr_t) &lsa, sizeof lsa))) return error; SCARG(&bsa, s) = lsa.s; SCARG(&bsa, buf) = lsa.msg; SCARG(&bsa, len) = lsa.len; SCARG(&bsa, flags) = linux_to_bsd_msg_flags(lsa.flags); tolen = lsa.tolen; if (lsa.to) { struct sockaddr *sa; if ((error = linux_sa_get(p, &sg, &sa, lsa.to, &tolen))) return (error); SCARG(&bsa, to) = sa; } else SCARG(&bsa, to) = NULL; SCARG(&bsa, tolen) = tolen; if (linux_check_hdrincl(p, lsa.s, retval, &sg) == 0) return linux_sendto_hdrincl(p, &bsa, retval, &sg); return sys_sendto(p, &bsa, retval); } int linux_recvfrom(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_recvfrom_args /* { syscallarg(int) s; syscallarg(void *) buf; syscallarg(int) len; syscallarg(int) flags; syscallarg(struct osockaddr *) from; syscallarg(int *) fromlen; } */ *uap = v; struct linux_recvfrom_args lra; struct sys_recvfrom_args bra; int error; if ((error = copyin((caddr_t) uap, (caddr_t) &lra, sizeof lra))) return error; SCARG(&bra, s) = lra.s; SCARG(&bra, buf) = lra.buf; SCARG(&bra, len) = lra.len; SCARG(&bra, flags) = linux_to_bsd_msg_flags(lra.flags); SCARG(&bra, from) = (struct sockaddr *) lra.from; SCARG(&bra, fromlenaddr) = lra.fromlen; if ((error = sys_recvfrom(p, &bra, retval))) return (error); if (lra.from && (error = linux_sa_put(lra.from))) return (error); return (0); } int linux_shutdown(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_shutdown_args /* { syscallarg(int) s; syscallarg(int) how; } */ *uap = v; struct linux_shutdown_args lsa; struct sys_shutdown_args bsa; int error; if ((error = copyin((caddr_t) uap, (caddr_t) &lsa, sizeof lsa))) return error; SCARG(&bsa, s) = lsa.s; SCARG(&bsa, how) = lsa.how; return sys_shutdown(p, &bsa, retval); } /* * Convert socket option level from Linux to OpenBSD value. Only SOL_SOCKET * is different, the rest matches IPPROTO_* on both systems. */ int linux_to_bsd_sopt_level(llevel) int llevel; { switch (llevel) { case LINUX_SOL_SOCKET: return SOL_SOCKET; case LINUX_SOL_IP: return IPPROTO_IP; case LINUX_SOL_TCP: return IPPROTO_TCP; case LINUX_SOL_UDP: return IPPROTO_UDP; default: return -1; } } /* * Convert Linux socket level socket option numbers to OpenBSD values. */ int linux_to_bsd_so_sockopt(lopt) int lopt; { switch (lopt) { case LINUX_SO_DEBUG: return SO_DEBUG; case LINUX_SO_REUSEADDR: /* * Linux does not implement SO_REUSEPORT, but allows reuse * of a host:port pair through SO_REUSEADDR even if the * address is not a multicast-address. Effectively, this * means that we should use SO_REUSEPORT to allow Linux * applications to not exit with EADDRINUSE. */ return SO_REUSEPORT; 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_PRIORITY: case LINUX_SO_NO_CHECK: default: return -1; } } /* * Convert Linux IP level socket option number to OpenBSD values. */ int linux_to_bsd_ip_sockopt(lopt) int lopt; { switch (lopt) { case LINUX_IP_TOS: return IP_TOS; case LINUX_IP_TTL: return IP_TTL; case LINUX_IP_MULTICAST_TTL: return IP_MULTICAST_TTL; case LINUX_IP_MULTICAST_LOOP: return IP_MULTICAST_LOOP; case LINUX_IP_MULTICAST_IF: return IP_MULTICAST_IF; 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; default: return -1; } } /* * Convert Linux TCP level socket option number to OpenBSD values. */ int linux_to_bsd_tcp_sockopt(lopt) int lopt; { switch (lopt) { case LINUX_TCP_NODELAY: return TCP_NODELAY; case LINUX_TCP_MAXSEG: return TCP_MAXSEG; default: return -1; } } /* * Convert Linux UDP level socket option number to OpenBSD values. */ int linux_to_bsd_udp_sockopt(lopt) int lopt; { switch (lopt) { default: return -1; } } /* * Another reasonably straightforward function: setsockopt(2). * The level and option numbers are converted; the values passed * are not (yet) converted, the ones currently implemented don't * need conversion, as they are the same on both systems. */ int linux_setsockopt(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_setsockopt_args /* { syscallarg(int) s; syscallarg(int) level; syscallarg(int) optname; syscallarg(void *) optval; syscallarg(int) optlen; } */ *uap = v; struct linux_setsockopt_args lsa; struct file *fp; struct mbuf *m = NULL; struct socket *so; int error, level, name; if ((error = copyin((caddr_t) uap, (caddr_t) &lsa, sizeof lsa))) return error; if ((error = getsock(p->p_fd, lsa.s, &fp)) != 0) return error; level = linux_to_bsd_sopt_level(lsa.level); switch (level) { case SOL_SOCKET: name = linux_to_bsd_so_sockopt(lsa.optname); break; case IPPROTO_IP: name = linux_to_bsd_ip_sockopt(lsa.optname); break; case IPPROTO_TCP: name = linux_to_bsd_tcp_sockopt(lsa.optname); break; case IPPROTO_UDP: name = linux_to_bsd_udp_sockopt(lsa.optname); break; default: error = EINVAL; goto bad; } if (name == -1) { error = EINVAL; goto bad; } if (lsa.optlen > MLEN) { error = EINVAL; goto bad; } if (lsa.optval != NULL) { m = m_get(M_WAIT, MT_SOOPTS); error = copyin(lsa.optval, mtod(m, caddr_t), lsa.optlen); if (error) { (void) m_free(m); goto bad; } m->m_len = lsa.optlen; } so = (struct socket *)fp->f_data; if (so->so_proto && level == IPPROTO_TCP && name == TCP_NODELAY && so->so_proto->pr_domain->dom_family == AF_LOCAL && so->so_proto->pr_protocol == PF_LOCAL) { /* ignore it */ error = 0; goto bad; } error = sosetopt(so, level, name, m); bad: FRELE(fp, p); return (error); } /* * getsockopt(2) is very much the same as setsockopt(2) (see above) */ int linux_getsockopt(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_getsockopt_args /* { syscallarg(int) s; syscallarg(int) level; syscallarg(int) optname; syscallarg(void *) optval; syscallarg(int) *optlen; } */ *uap = v; struct linux_getsockopt_args lga; struct sys_getsockopt_args bga; int error, name; if ((error = copyin((caddr_t) uap, (caddr_t) &lga, sizeof lga))) return error; SCARG(&bga, s) = lga.s; SCARG(&bga, level) = linux_to_bsd_sopt_level(lga.level); SCARG(&bga, val) = lga.optval; SCARG(&bga, avalsize) = lga.optlen; switch (SCARG(&bga, level)) { case SOL_SOCKET: name = linux_to_bsd_so_sockopt(lga.optname); break; case IPPROTO_IP: name = linux_to_bsd_ip_sockopt(lga.optname); break; case IPPROTO_TCP: name = linux_to_bsd_tcp_sockopt(lga.optname); break; case IPPROTO_UDP: name = linux_to_bsd_udp_sockopt(lga.optname); break; default: return EINVAL; } if (name == -1) return EINVAL; SCARG(&bga, name) = name; return sys_getsockopt(p, &bga, retval); } int linux_recvmsg(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_recvmsg_args /* { syscallarg(int) s; syscallarg(caddr_t) msg; syscallarg(int) flags; } */ *uap = v; struct linux_recvmsg_args lla; struct sys_recvmsg_args bla; struct msghdr msg; int error; if ((error = copyin((caddr_t) uap, (caddr_t) &lla, sizeof lla))) return error; SCARG(&bla, s) = lla.s; SCARG(&bla, msg) = (struct msghdr *)lla.msg; SCARG(&bla, flags) = linux_to_bsd_msg_flags(lla.flags); error = sys_recvmsg(p, &bla, retval); if (error) return (error); error = copyin(lla.msg, (caddr_t)&msg, sizeof(msg)); if (!error && msg.msg_name && msg.msg_namelen > 2) error = linux_sa_put(msg.msg_name); return (error); } int linux_sendmsg(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sendmsg_args /* { syscallarg(int) s; syscallarg(struct msghdr *) msg; syscallarg(int) flags; } */ *uap = v; struct linux_sendmsg_args lla; struct sys_sendmsg_args bla; struct msghdr msg, *nmsg = NULL; int error; caddr_t control; int level; if ((error = copyin((caddr_t) uap, (caddr_t) &lla, sizeof lla))) return error; if ((error = copyin(lla.msg, (caddr_t) &msg, sizeof(msg)))) return (error); if (msg.msg_name) { struct sockaddr *sa; caddr_t sg = stackgap_init(p->p_emul); nmsg = (struct msghdr *)stackgap_alloc(&sg, sizeof(struct msghdr)); if (!nmsg) return (ENOMEM); error = linux_sa_get(p, &sg, &sa, (struct osockaddr *)msg.msg_name, &msg.msg_namelen); if (error) return (error); msg.msg_name = (struct sockaddr *)sa; if ((error = copyout(&msg, nmsg, sizeof(struct msghdr)))) return (error); lla.msg = nmsg; } SCARG(&bla, s) = lla.s; SCARG(&bla, msg) = lla.msg; SCARG(&bla, flags) = linux_to_bsd_msg_flags(lla.flags); error = copyin(lla.msg->msg_control, &control, sizeof(caddr_t)); if (error) return error; if (control == NULL) goto done; error = copyin(&((struct cmsghdr *)control)->cmsg_level, &level, sizeof(int)); if (error) return error; if (level == 1) { /* * Linux thinks that SOL_SOCKET is 1; we know that it's really * 0xffff, of course. */ level = SOL_SOCKET; /* * XXX should use stack gap! * We don't because the control header is variable length * up to 2048 bytes, and there's only 512 bytes of gap. */ error = copyout(&level, &((struct cmsghdr *)control)-> cmsg_level, sizeof(int)); if (error) return error; } done: error = sys_sendmsg(p, &bla, retval); /* replace level, just in case somebody cares. */ if (level == SOL_SOCKET) { level = 1; /* don't worry about the error */ copyout(&level, &((struct cmsghdr *)control)->cmsg_level, sizeof(int)); } return (error); } /* * Copy the osockaddr structure pointed to by osa to kernel, adjust * family and convert to sockaddr, allocate stackgap and put the * the converted structure there, address on stackgap returned in sap. */ int linux_sa_get(p, sgp, sap, osa, osalen) struct proc *p; caddr_t *sgp; struct sockaddr **sap; const struct osockaddr *osa; int *osalen; { int error=0, bdom; struct sockaddr *sa, *usa; struct osockaddr *kosa; int alloclen; #ifdef INET6 int oldv6size; struct sockaddr_in6 *sin6; #endif if (*osalen < 2 || *osalen > UCHAR_MAX || !osa) { return (EINVAL); } if (osa->sa_family == AF_UNIX && *osalen > sizeof(struct sockaddr_un)) alloclen = sizeof(struct sockaddr_un); else alloclen = *osalen; #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 (alloclen == sizeof (struct sockaddr_in6) - sizeof (u_int32_t)) { alloclen = sizeof (struct sockaddr_in6); oldv6size = 1; } #endif kosa = (struct osockaddr *) malloc(alloclen, M_TEMP, M_WAITOK); if ((error = copyin(osa, (caddr_t) kosa, *osalen))) { goto out; } bdom = linux_to_bsd_domain(kosa->sa_family); if (bdom == -1) { error = EINVAL; 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. * * Still accept addresses for which the scope id is not used. */ if (oldv6size && 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 { error = EINVAL; goto out; } } else #endif if (bdom == AF_INET) { alloclen = sizeof(struct sockaddr_in); } sa = (struct sockaddr *) kosa; sa->sa_family = bdom; sa->sa_len = alloclen; usa = (struct sockaddr *) stackgap_alloc(sgp, alloclen); if (!usa) { error = ENOMEM; goto out; } if ((error = copyout(sa, usa, alloclen))) { goto out; } *sap = usa; out: *osalen = alloclen; free(kosa, M_TEMP); return (error); } int linux_sa_put(osa) struct osockaddr *osa; { struct sockaddr sa; struct osockaddr *kosa; int error, bdom, len; /* * Only read/write the sockaddr family and length part, the rest is * not changed. */ len = sizeof(sa.sa_len) + sizeof(sa.sa_family); error = copyin((caddr_t) osa, (caddr_t) &sa, len); if (error) return (error); bdom = bsd_to_linux_domain(sa.sa_family); if (bdom == -1) return (EINVAL); /* Note: we convert from sockaddr to osockaddr here, too */ kosa = (struct osockaddr *) &sa; kosa->sa_family = bdom; error = copyout(kosa, osa, len); if (error) return (error); return (0); } /* * Entry point to all Linux socket calls. Just check which call to * make and take appropriate action. */ int linux_sys_socketcall(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_socketcall_args /* { syscallarg(int) what; syscallarg(void *) args; } */ *uap = v; switch (SCARG(uap, what)) { case LINUX_SYS_socket: return linux_socket(p, SCARG(uap, args), retval); case LINUX_SYS_bind: return linux_bind(p, SCARG(uap, args), retval); case LINUX_SYS_connect: return linux_connect(p, SCARG(uap, args), retval); case LINUX_SYS_listen: return linux_listen(p, SCARG(uap, args), retval); case LINUX_SYS_accept: return linux_accept(p, SCARG(uap, args), retval); case LINUX_SYS_getsockname: return linux_getsockname(p, SCARG(uap, args), retval); case LINUX_SYS_getpeername: return linux_getpeername(p, SCARG(uap, args), retval); case LINUX_SYS_socketpair: return linux_socketpair(p, SCARG(uap, args), retval); case LINUX_SYS_send: return linux_send(p, SCARG(uap, args), retval); case LINUX_SYS_recv: return linux_recv(p, SCARG(uap, args), retval); case LINUX_SYS_sendto: return linux_sendto(p, SCARG(uap, args), retval); case LINUX_SYS_recvfrom: return linux_recvfrom(p, SCARG(uap, args), retval); case LINUX_SYS_shutdown: return linux_shutdown(p, SCARG(uap, args), retval); case LINUX_SYS_setsockopt: return linux_setsockopt(p, SCARG(uap, args), retval); case LINUX_SYS_getsockopt: return linux_getsockopt(p, SCARG(uap, args), retval); case LINUX_SYS_sendmsg: return linux_sendmsg(p, SCARG(uap, args), retval); case LINUX_SYS_recvmsg: return linux_recvmsg(p, SCARG(uap, args), retval); default: return ENOSYS; } } int linux_ioctl_socket(p, v, retval) register struct proc *p; void *v; register_t *retval; { struct linux_sys_ioctl_args /* { syscallarg(int) fd; syscallarg(u_long) com; syscallarg(caddr_t) data; } */ *uap = v; u_long com; struct sys_ioctl_args ia; struct file *fp; struct filedesc *fdp; struct vnode *vp; int (*ioctlf)(struct file *, u_long, caddr_t, struct proc *); struct ioctl_pt pt; int error = 0, isdev = 0, dosys = 1; fdp = p->p_fd; if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) return (EBADF); FREF(fp); if (fp->f_type == DTYPE_VNODE) { vp = (struct vnode *)fp->f_data; isdev = vp->v_type == VCHR; } /* * Don't try to interpret socket ioctl calls that are done * on a device filedescriptor, just pass them through, to * emulate Linux behaviour. Use PTIOCLINUX so that the * device will only handle these if it's prepared to do * so, to avoid unexpected things from happening. */ if (isdev) { dosys = 0; ioctlf = fp->f_ops->fo_ioctl; pt.com = SCARG(uap, com); pt.data = SCARG(uap, data); error = ioctlf(fp, PTIOCLINUX, (caddr_t)&pt, p); /* * XXX hack: if the function returns EJUSTRETURN, * it has stuffed a sysctl return value in pt.data. */ if (error == EJUSTRETURN) { retval[0] = (register_t)pt.data; error = 0; } goto out; } com = SCARG(uap, com); retval[0] = 0; switch (com) { case LINUX_FIOSETOWN: SCARG(&ia, com) = FIOSETOWN; break; case LINUX_SIOCSPGRP: SCARG(&ia, com) = SIOCSPGRP; break; case LINUX_FIOGETOWN: SCARG(&ia, com) = FIOGETOWN; break; case LINUX_SIOCGPGRP: SCARG(&ia, com) = SIOCGPGRP; break; case LINUX_SIOCATMARK: SCARG(&ia, com) = SIOCATMARK; break; #if 0 case LINUX_SIOCGSTAMP: SCARG(&ia, com) = SIOCGSTAMP; break; #endif case LINUX_SIOCGIFCONF: SCARG(&ia, com) = OSIOCGIFCONF; break; case LINUX_SIOCGIFFLAGS: SCARG(&ia, com) = SIOCGIFFLAGS; break; case LINUX_SIOCGIFADDR: SCARG(&ia, com) = OSIOCGIFADDR; break; case LINUX_SIOCGIFDSTADDR: SCARG(&ia, com) = OSIOCGIFDSTADDR; break; case LINUX_SIOCGIFBRDADDR: SCARG(&ia, com) = OSIOCGIFBRDADDR; break; case LINUX_SIOCGIFNETMASK: SCARG(&ia, com) = OSIOCGIFNETMASK; break; case LINUX_SIOCGIFMETRIC: SCARG(&ia, com) = SIOCGIFMETRIC; break; case LINUX_SIOCGIFMTU: SCARG(&ia, com) = SIOCGIFMTU; break; case LINUX_SIOCADDMULTI: SCARG(&ia, com) = SIOCADDMULTI; break; case LINUX_SIOCDELMULTI: SCARG(&ia, com) = SIOCDELMULTI; break; case LINUX_SIOCGIFHWADDR: { struct linux_ifreq *ifr = (struct linux_ifreq *)SCARG(uap, data); struct sockaddr_dl *sdl; struct ifnet *ifp; struct ifaddr *ifa; /* * Note that we don't actually respect the name in the ifreq * structure, as Linux interface names are all different. */ TAILQ_FOREACH(ifp, &ifnet, if_list) { if (ifp->if_type != IFT_ETHER) continue; TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) && (sdl->sdl_family == AF_LINK) && (sdl->sdl_type == IFT_ETHER)) { error = copyout(LLADDR(sdl), (caddr_t)&ifr->ifr_hwaddr.sa_data, LINUX_IFHWADDRLEN); dosys = 0; goto out; } } } error = ENOENT; break; } default: error = EINVAL; } out: if (error == 0 && dosys) { SCARG(&ia, fd) = SCARG(uap, fd); SCARG(&ia, data) = SCARG(uap, data); error = sys_ioctl(p, &ia, retval); } FRELE(fp, p); return (error); }