/* $NetBSD: linux_socket.c,v 1.39 2002/05/12 18:30:32 jschauma Exp $ */ /*- * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Frank van der Linden and Eric Haszlakiewicz. * * 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 by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * Functions in multiarch: * linux_sys_socketcall : linux_socketcall.c * * XXX Note: Linux CMSG_ALIGN() uses (sizeof(long)-1). For architectures * where our CMSG_ALIGN() differs (like powerpc, sparc, sparc64), the passed * control structure would need to be adjusted accordingly in sendmsg() and * recvmsg(). */ #include __KERNEL_RCSID(0, "$NetBSD: linux_socket.c,v 1.39 2002/05/12 18:30:32 jschauma Exp $"); #if defined(_KERNEL_OPT) #include "opt_inet.h" #endif #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 #ifdef DEBUG_LINUX #define DPRINTF(a) uprintf a #else #define DPRINTF(a) #endif /* * The calls in this file are entered either via the linux_socketcall() * interface or, on the Alpha, as individual syscalls. The * linux_socketcall function does any massaging of arguments so that all * the calls in here need not think that they are anything other * than a normal syscall. */ static int linux_to_bsd_domain __P((int)); static int bsd_to_linux_domain __P((int)); int linux_to_bsd_sopt_level __P((int)); int linux_to_bsd_so_sockopt __P((int)); int linux_to_bsd_ip_sockopt __P((int)); int linux_to_bsd_tcp_sockopt __P((int)); int linux_to_bsd_udp_sockopt __P((int)); int linux_getifhwaddr __P((struct proc *, register_t *, u_int, void *)); static int linux_sa_get __P((struct proc *, caddr_t *sgp, struct sockaddr **sap, const struct osockaddr *osa, int *osalen)); static int linux_sa_put __P((struct osockaddr *osa)); static const int linux_to_bsd_domain_[LINUX_AF_MAX] = { AF_UNSPEC, AF_UNIX, AF_INET, AF_CCITT, /* LINUX_AF_AX25 */ AF_IPX, AF_APPLETALK, -1, /* LINUX_AF_NETROM */ -1, /* LINUX_AF_BRIDGE */ -1, /* LINUX_AF_ATMPVC */ AF_CCITT, /* LINUX_AF_X25 */ AF_INET6, -1, /* LINUX_AF_ROSE */ AF_DECnet, -1, /* LINUX_AF_NETBEUI */ -1, /* LINUX_AF_SECURITY */ 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 */ LINUX_AF_AX25, /* AF_CCITT */ LINUX_AF_SNA, LINUX_AF_DECnet, -1, /* AF_DLI */ -1, /* AF_LAT */ -1, /* AF_HYLINK */ LINUX_AF_APPLETALK, 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 */ 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]; } int linux_sys_socket(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_socket_args /* { syscallarg(int) domain; syscallarg(int) type; syscallarg(int) protocol; } */ *uap = v; struct sys_socket_args bsa; SCARG(&bsa, protocol) = SCARG(uap, protocol); SCARG(&bsa, type) = SCARG(uap, type); SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); if (SCARG(&bsa, domain) == -1) return EINVAL; return sys_socket(p, &bsa, retval); } int linux_sys_socketpair(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_socketpair_args /* { syscallarg(int) domain; syscallarg(int) type; syscallarg(int) protocol; syscallarg(int *) rsv; } */ *uap = v; struct sys_socketpair_args bsa; SCARG(&bsa, domain) = linux_to_bsd_domain(SCARG(uap, domain)); if (SCARG(&bsa, domain) == -1) return EINVAL; SCARG(&bsa, type) = SCARG(uap, type); SCARG(&bsa, protocol) = SCARG(uap, protocol); SCARG(&bsa, rsv) = SCARG(uap, rsv); return sys_socketpair(p, &bsa, retval); } int linux_sys_sendto(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_sendto_args /* { syscallarg(int) s; syscallarg(void *) msg; syscallarg(int) len; syscallarg(int) flags; syscallarg(struct osockaddr *) to; syscallarg(int) tolen; } */ *uap = v; struct sys_sendto_args bsa; int tolen; SCARG(&bsa, s) = SCARG(uap, s); SCARG(&bsa, buf) = SCARG(uap, msg); SCARG(&bsa, len) = (size_t) SCARG(uap, len); SCARG(&bsa, flags) = SCARG(uap, flags); tolen = SCARG(uap, tolen); if (SCARG(uap, to)) { struct sockaddr *sa; int error; caddr_t sg = stackgap_init(p, 0); if ((error = linux_sa_get(p, &sg, &sa, SCARG(uap, to), &tolen))) return (error); SCARG(&bsa, to) = sa; } else SCARG(&bsa, to) = NULL; SCARG(&bsa, tolen) = tolen; return (sys_sendto(p, &bsa, retval)); } int linux_sys_sendmsg(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_sendmsg_args /* { syscallarg(int) s; syscallarg(struct msghdr *) msg; syscallarg(u_int) flags; } */ *uap = v; struct msghdr msg; int error; struct sys_sendmsg_args bsa; struct msghdr *nmsg = NULL; error = copyin(SCARG(uap, msg), (caddr_t)&msg, sizeof(msg)); if (error) return (error); if (msg.msg_name) { struct sockaddr *sa; caddr_t sg = stackgap_init(p, 0); nmsg = (struct msghdr *) stackgap_alloc(p, &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); } /* * XXX handle different alignment of cmsg data on architectures where * the Linux alignment is different (powerpc, sparc, sparc64). */ SCARG(&bsa, s) = SCARG(uap, s); SCARG(&bsa, msg) = nmsg; SCARG(&bsa, flags) = SCARG(uap, flags); if ((error = sys_sendmsg(p, &bsa, retval))) return (error); return (0); } int linux_sys_recvfrom(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_recvfrom_args /* { syscallarg(int) s; syscallarg(void *) buf; syscallarg(int) len; syscallarg(int) flags; syscallarg(struct osockaddr *) from; syscallarg(int *) fromlenaddr; } */ *uap = v; int error; struct sys_recvfrom_args bra; SCARG(&bra, s) = SCARG(uap, s); SCARG(&bra, buf) = SCARG(uap, buf); SCARG(&bra, len) = SCARG(uap, len); SCARG(&bra, flags) = SCARG(uap, flags); SCARG(&bra, from) = (struct sockaddr *) SCARG(uap, from); SCARG(&bra, fromlenaddr) = SCARG(uap, fromlenaddr); if ((error = sys_recvfrom(p, &bra, retval))) return (error); if (SCARG(uap, from) && (error = linux_sa_put(SCARG(uap, from)))) return (error); return (0); } int linux_sys_recvmsg(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_recvmsg_args /* { syscallarg(int) s; syscallarg(struct msghdr *) msg; syscallarg(u_int) flags; } */ *uap = v; struct msghdr msg; int error; if ((error = sys_recvmsg(p, v, retval))) return (error); error = copyin((caddr_t)SCARG(uap, msg), (caddr_t)&msg, sizeof(msg)); if (!error && msg.msg_name && msg.msg_namelen > 2) error = linux_sa_put(msg.msg_name); /* * XXX handle different alignment of cmsg data on architectures where * the Linux alignment is different (powerpc, sparc, sparc64). */ return (error); } /* * Convert socket option level from Linux to NetBSD 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 NetBSD 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 NetBSD 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; default: return -1; } } /* * Convert Linux TCP level socket option number to NetBSD 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 NetBSD 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_sys_setsockopt(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_setsockopt_args /* { syscallarg(int) s; syscallarg(int) level; syscallarg(int) optname; syscallarg(void *) optval; syscallarg(int) optlen; } */ *uap = v; struct sys_setsockopt_args bsa; int name; SCARG(&bsa, s) = SCARG(uap, s); SCARG(&bsa, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); SCARG(&bsa, val) = SCARG(uap, optval); SCARG(&bsa, valsize) = SCARG(uap, optlen); switch (SCARG(&bsa, level)) { case SOL_SOCKET: name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); break; case IPPROTO_IP: name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); break; case IPPROTO_TCP: name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); break; case IPPROTO_UDP: name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); break; default: return EINVAL; } if (name == -1) return EINVAL; SCARG(&bsa, name) = name; return sys_setsockopt(p, &bsa, retval); } /* * getsockopt(2) is very much the same as setsockopt(2) (see above) */ int linux_sys_getsockopt(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_getsockopt_args /* { syscallarg(int) s; syscallarg(int) level; syscallarg(int) optname; syscallarg(void *) optval; syscallarg(int *) optlen; } */ *uap = v; struct sys_getsockopt_args bga; int name; SCARG(&bga, s) = SCARG(uap, s); SCARG(&bga, level) = linux_to_bsd_sopt_level(SCARG(uap, level)); SCARG(&bga, val) = SCARG(uap, optval); SCARG(&bga, avalsize) = SCARG(uap, optlen); switch (SCARG(&bga, level)) { case SOL_SOCKET: name = linux_to_bsd_so_sockopt(SCARG(uap, optname)); break; case IPPROTO_IP: name = linux_to_bsd_ip_sockopt(SCARG(uap, optname)); break; case IPPROTO_TCP: name = linux_to_bsd_tcp_sockopt(SCARG(uap, optname)); break; case IPPROTO_UDP: name = linux_to_bsd_udp_sockopt(SCARG(uap, optname)); break; default: return EINVAL; } if (name == -1) return EINVAL; SCARG(&bga, name) = name; return sys_getsockopt(p, &bga, retval); } #define IF_NAME_LEN 16 int linux_getifhwaddr(p, retval, fd, data) struct proc *p; register_t *retval; u_int fd; void *data; { /* Not the full structure, just enough to map what we do here */ struct linux_ifreq { char if_name[IF_NAME_LEN]; struct osockaddr hwaddr; } lreq; struct filedesc *fdp; struct file *fp; struct ifaddr *ifa; struct ifnet *ifp; struct sockaddr_dl *sadl; int error, found; int index, ifnum; /* * We can't emulate this ioctl by calling sys_ioctl() to run * SIOCGIFCONF, because the user buffer is not of the right * type to take those results. We can't use kernel buffers to * receive the results, as the implementation of sys_ioctl() * and ifconf() [which implements SIOCGIFCONF] use * copyin()/copyout() which will fail on kernel addresses. * * So, we must duplicate code from sys_ioctl() and ifconf(). Ugh. */ fdp = p->p_fd; if ((fp = fd_getfile(fdp, fd)) == NULL) return (EBADF); FILE_USE(fp); if ((fp->f_flag & (FREAD | FWRITE)) == 0) { error = EBADF; goto out; } error = copyin(data, (caddr_t)&lreq, sizeof(lreq)); if (error) goto out; lreq.if_name[IF_NAME_LEN-1] = '\0'; /* just in case */ /* * Try real interface name first, then fake "ethX" */ for (ifp = ifnet.tqh_first, found = 0; ifp != 0 && !found; ifp = ifp->if_list.tqe_next) { if (strcmp(lreq.if_name, ifp->if_xname)) /* not this interface */ continue; found=1; if ((ifa = ifp->if_addrlist.tqh_first) != 0) { for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) { sadl = (struct sockaddr_dl *)ifa->ifa_addr; /* only return ethernet addresses */ /* XXX what about FDDI, etc. ? */ if (sadl->sdl_family != AF_LINK || sadl->sdl_type != IFT_ETHER) continue; memcpy((caddr_t)&lreq.hwaddr.sa_data, LLADDR(sadl), MIN(sadl->sdl_alen, sizeof(lreq.hwaddr.sa_data))); lreq.hwaddr.sa_family = sadl->sdl_family; error = copyout((caddr_t)&lreq, data, sizeof(lreq)); goto out; } } else { error = ENODEV; goto out; } } if (strncmp(lreq.if_name, "eth", 3) == 0) { for (ifnum = 0, index = 3; lreq.if_name[index] != '\0' && index < IF_NAME_LEN; index++) { ifnum *= 10; ifnum += lreq.if_name[index] - '0'; } error = EINVAL; /* in case we don't find one */ for (ifp = ifnet.tqh_first, found = 0; ifp != 0 && !found; ifp = ifp->if_list.tqe_next) { memcpy(lreq.if_name, ifp->if_xname, MIN(IF_NAME_LEN, IFNAMSIZ)); if ((ifa = ifp->if_addrlist.tqh_first) == 0) /* no addresses on this interface */ continue; else for (; ifa != 0; ifa = ifa->ifa_list.tqe_next) { sadl = (struct sockaddr_dl *)ifa->ifa_addr; /* only return ethernet addresses */ /* XXX what about FDDI, etc. ? */ if (sadl->sdl_family != AF_LINK || sadl->sdl_type != IFT_ETHER) continue; if (ifnum--) /* not the reqested iface */ continue; memcpy((caddr_t)&lreq.hwaddr.sa_data, LLADDR(sadl), MIN(sadl->sdl_alen, sizeof(lreq.hwaddr.sa_data))); lreq.hwaddr.sa_family = sadl->sdl_family; error = copyout((caddr_t)&lreq, data, sizeof(lreq)); found = 1; break; } } } else { /* unknown interface, not even an "eth*" name */ error = ENODEV; } out: FILE_UNUSE(fp, p); return error; } #undef IF_NAME_LEN int linux_ioctl_socket(p, uap, retval) struct proc *p; struct linux_sys_ioctl_args /* { syscallarg(int) fd; syscallarg(u_long) com; syscallarg(caddr_t) data; } */ *uap; register_t *retval; { u_long com; int error = 0, isdev = 0, dosys = 1; struct sys_ioctl_args ia; struct file *fp; struct filedesc *fdp; struct vnode *vp; int (*ioctlf) __P((struct file *, u_long, caddr_t, struct proc *)); struct ioctl_pt pt; fdp = p->p_fd; if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL) return (EBADF); FILE_USE(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_SIOCGIFCONF: SCARG(&ia, com) = OSIOCGIFCONF; break; case LINUX_SIOCGIFFLAGS: SCARG(&ia, com) = SIOCGIFFLAGS; break; case LINUX_SIOCSIFFLAGS: SCARG(&ia, com) = SIOCSIFFLAGS; 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_SIOCADDMULTI: SCARG(&ia, com) = SIOCADDMULTI; break; case LINUX_SIOCDELMULTI: SCARG(&ia, com) = SIOCDELMULTI; break; case LINUX_SIOCGIFHWADDR: error = linux_getifhwaddr(p, retval, SCARG(uap, fd), SCARG(uap, data)); dosys = 0; break; default: error = EINVAL; } out: FILE_UNUSE(fp, p); if (error ==0 && dosys) { SCARG(&ia, fd) = SCARG(uap, fd); SCARG(&ia, data) = SCARG(uap, data); error = sys_ioctl(p, &ia, retval); } return error; } int linux_sys_connect(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_connect_args /* { syscallarg(int) s; syscallarg(const struct sockaddr *) name; syscallarg(int) namelen; } */ *uap = v; int error; struct sockaddr *sa; struct sys_connect_args bca; caddr_t sg = stackgap_init(p, 0); int namlen; namlen = SCARG(uap, namelen); error = linux_sa_get(p, &sg, &sa, SCARG(uap, name), &namlen); if (error) return (error); SCARG(&bca, s) = SCARG(uap, s); SCARG(&bca, name) = sa; SCARG(&bca, namelen) = (unsigned int) namlen; error = sys_connect(p, &bca, retval); if (error == EISCONN) { struct file *fp; struct socket *so; int s, state, prflags; /* getsock() will use the descriptor for us */ if (getsock(p->p_fd, SCARG(uap, s), &fp) != 0) return EISCONN; s = splsoftnet(); so = (struct socket *)fp->f_data; state = so->so_state; prflags = so->so_proto->pr_flags; splx(s); FILE_UNUSE(fp, p); /* * We should only let this call succeed once per * non-blocking connect; however we don't have * a convenient place to keep that state.. */ if ((state & SS_NBIO) && (state & SS_ISCONNECTED) && (prflags & PR_CONNREQUIRED)) return 0; } return (error); } int linux_sys_bind(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_bind_args /* { syscallarg(int) s; syscallarg(const struct osockaddr *) name; syscallarg(int) namelen; } */ *uap = v; int error, namlen; struct sys_bind_args bsa; namlen = SCARG(uap, namelen); SCARG(&bsa, s) = SCARG(uap, s); if (SCARG(uap, name)) { struct sockaddr *sa; caddr_t sg = stackgap_init(p, 0); error = linux_sa_get(p, &sg, &sa, SCARG(uap, name), &namlen); if (error) return (error); SCARG(&bsa, name) = sa; } else SCARG(&bsa, name) = NULL; SCARG(&bsa, namelen) = namlen; return (sys_bind(p, &bsa, retval)); } int linux_sys_getsockname(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_getsockname_args /* { syscallarg(int) fdes; syscallarg(caddr_t) asa; syscallarg(int *) alen; } */ *uap = v; int error; if ((error = sys_getsockname(p, uap, retval)) != 0) return (error); if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) return (error); return (0); } int linux_sys_getpeername(p, v, retval) struct proc *p; void *v; register_t *retval; { struct sys_getpeername_args /* { syscallarg(int) fdes; syscallarg(caddr_t) asa; syscallarg(int *) alen; } */ *uap = v; int error; if ((error = sys_getpeername(p, uap, retval)) != 0) return (error); if ((error = linux_sa_put((struct osockaddr *)SCARG(uap, asa)))) return (error); return (0); } /* * 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. */ static 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 = (struct osockaddr *) &sa; int alloclen; #ifdef INET6 int oldv6size; struct sockaddr_in6 *sin6; #endif if (*osalen < 2 || *osalen > UCHAR_MAX || !osa) { DPRINTF(("bad osa=%p osalen=%d\n", osa, *osalen)); return (EINVAL); } 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))) { DPRINTF(("error copying osa %d\n", error)); goto out; } bdom = linux_to_bsd_domain(kosa->sa_family); if (bdom == -1) { DPRINTF(("bad linux family=%d\n", kosa->sa_family)); 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 and write a message to system log. * * 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 { struct proc *p = curproc; /* XXX */ int uid = p->p_cred && p->p_ucred ? p->p_ucred->cr_uid : -1; log(LOG_DEBUG, "pid %d (%s), uid %d: obsolete pre-RFC2553 " "sockaddr_in6 rejected", p->p_pid, p->p_comm, uid); 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; #ifdef DEBUG_LINUX DPRINTF(("family %d, len = %d [ ", sa->sa_family, sa->sa_len)); for (bdom = 0; bdom < sizeof(sa->sa_data); bdom++) DPRINTF(("%02x ", sa->sa_data[bdom])); DPRINTF(("\n")); #endif usa = (struct sockaddr *) stackgap_alloc(p, sgp, alloclen); if (!usa) { error = ENOMEM; goto out; } if ((error = copyout(sa, usa, alloclen))) { DPRINTF(("error copying out socket %d\n", error)); goto out; } *sap = usa; out: *osalen = alloclen; free(kosa, M_TEMP); return (error); } static 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); } int linux_sys_recv(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_recv_args /* { syscallarg(int) s; syscallarg(void *) buf; syscallarg(int) len; syscallarg(int) flags; } */ *uap = v; struct sys_recvfrom_args bra; SCARG(&bra, s) = SCARG(uap, s); SCARG(&bra, buf) = SCARG(uap, buf); SCARG(&bra, len) = (size_t) SCARG(uap, len); SCARG(&bra, flags) = SCARG(uap, flags); SCARG(&bra, from) = NULL; SCARG(&bra, fromlenaddr) = NULL; return (sys_recvfrom(p, &bra, retval)); } int linux_sys_send(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_send_args /* { syscallarg(int) s; syscallarg(caddr_t) buf; syscallarg(int) len; syscallarg(int) flags; } */ *uap = v; struct sys_sendto_args bsa; SCARG(&bsa, s) = SCARG(uap, s); SCARG(&bsa, buf) = SCARG(uap, buf); SCARG(&bsa, len) = SCARG(uap, len); SCARG(&bsa, flags) = SCARG(uap, flags); SCARG(&bsa, to) = NULL; SCARG(&bsa, tolen) = 0; return (sys_sendto(p, &bsa, retval)); } int linux_sys_accept(p, v, retval) struct proc *p; void *v; register_t *retval; { struct linux_sys_accept_args /* { syscallarg(int) s; syscallarg(struct osockaddr *) name; syscallarg(int *) anamelen; } */ *uap = v; int error; struct sys_accept_args baa; SCARG(&baa, s) = SCARG(uap, s); SCARG(&baa, name) = (struct sockaddr *) SCARG(uap, name); SCARG(&baa, anamelen) = (unsigned int *) SCARG(uap, anamelen); if ((error = sys_accept(p, &baa, retval))) return (error); if (SCARG(uap, name) && (error = linux_sa_put(SCARG(uap, name)))) return (error); return (0); }