/*- * 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 withough 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. * * $Id: linux_socket.c,v 1.10 1997/12/14 03:17:54 msmith Exp $ */ /* XXX we use functions that might not exist. */ #include "opt_compat.h" #ifndef COMPAT_43 #error "Unable to compile Linux-emulator due to missing COMPAT_43 option!" #endif #include #include #include #include #include #include #include #include #include #include #include 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_AX25: return AF_CCITT; case LINUX_AF_IPX: return AF_IPX; case LINUX_AF_APPLETALK: return AF_APPLETALK; default: return -1; } } static int linux_to_bsd_sockopt_level(int level) { switch (level) { case LINUX_SOL_SOCKET: return SOL_SOCKET; default: 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; default: 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_PRIORITY: case LINUX_SO_NO_CHECK: default: return -1; } } /* Return 0 if IP_HDRINCL is set of the given socket, not 0 otherwise */ static int linux_check_hdrincl(struct proc *p, int s) { struct getsockopt_args /* { int s; int level; int name; caddr_t val; int *avalsize; } */ bsd_args; int error; caddr_t sg, val, valsize; int size_val = sizeof val; int optval; sg = stackgap_init(); val = stackgap_alloc(&sg, sizeof(int)); valsize = stackgap_alloc(&sg, sizeof(int)); if ((error=copyout(&size_val, valsize, sizeof(size_val)))) return error; bsd_args.s = s; bsd_args.level = IPPROTO_IP; bsd_args.name = IP_HDRINCL; bsd_args.val = val; bsd_args.avalsize = (int *)valsize; if ((error=getsockopt(p, &bsd_args))) return error; if ((error=copyin(val, &optval, sizeof(optval)))) return error; return optval == 0; } /* * Updated sendto() when IP_HDRINCL is set: * tweak endian-dependent fields in the IP packet. */ static int linux_sendto_hdrincl(struct proc *p, struct sendto_args *bsd_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) * and be as small as possible to minimize copying overhead. */ #define linux_ip_copysize 8 caddr_t sg; struct ip *packet; struct msghdr *msg; struct iovec *iov; int error; struct sendmsg_args /* { int s; caddr_t msg; int flags; } */ sendmsg_args; /* Check the packet isn't too small before we mess with it */ if (bsd_args->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(). */ sg = stackgap_init(); packet = (struct ip *)stackgap_alloc(&sg, linux_ip_copysize); msg = (struct msghdr *)stackgap_alloc(&sg, sizeof(*msg)); iov = (struct iovec *)stackgap_alloc(&sg, sizeof(*iov)*2); /* Make a copy of the beginning of the packet to be sent */ if ((error = copyin(bsd_args->buf, (caddr_t)packet, linux_ip_copysize))) return error; /* Convert fields from Linux to BSD raw IP socket format */ packet->ip_len = bsd_args->len; packet->ip_off = ntohs(packet->ip_off); /* Prepare the msghdr and iovec structures describing the new packet */ msg->msg_name = bsd_args->to; msg->msg_namelen = bsd_args->tolen; msg->msg_iov = iov; msg->msg_iovlen = 2; msg->msg_control = NULL; msg->msg_controllen = 0; msg->msg_flags = 0; iov[0].iov_base = (char *)packet; iov[0].iov_len = linux_ip_copysize; iov[1].iov_base = (char *)(bsd_args->buf) + linux_ip_copysize; iov[1].iov_len = bsd_args->len - linux_ip_copysize; sendmsg_args.s = bsd_args->s; sendmsg_args.msg = (caddr_t)msg; sendmsg_args.flags = bsd_args->flags; return sendmsg(p, &sendmsg_args); } struct linux_socket_args { int domain; int type; int protocol; }; static int linux_socket(struct proc *p, struct linux_socket_args *args) { struct linux_socket_args linux_args; struct socket_args /* { int domain; int type; int protocol; } */ bsd_args; int error; int retval_socket; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.protocol = linux_args.protocol; bsd_args.type = linux_args.type; bsd_args.domain = linux_to_bsd_domain(linux_args.domain); if (bsd_args.domain == -1) return EINVAL; retval_socket = socket(p, &bsd_args); if (bsd_args.type == SOCK_RAW && (bsd_args.protocol == IPPROTO_RAW || bsd_args.protocol == 0) && bsd_args.domain == AF_INET && retval_socket >= 0) { /* It's a raw IP socket: set the IP_HDRINCL option. */ struct setsockopt_args /* { int s; int level; int name; caddr_t val; int valsize; } */ bsd_setsockopt_args; caddr_t sg; int *hdrincl; sg = stackgap_init(); hdrincl = (int *)stackgap_alloc(&sg, sizeof(*hdrincl)); *hdrincl = 1; bsd_setsockopt_args.s = p->p_retval[0]; bsd_setsockopt_args.level = IPPROTO_IP; bsd_setsockopt_args.name = IP_HDRINCL; bsd_setsockopt_args.val = (caddr_t)hdrincl; bsd_setsockopt_args.valsize = sizeof(*hdrincl); /* We ignore any error returned by setsockopt() */ setsockopt(p, &bsd_setsockopt_args); /* Copy back the return value from socket() */ p->p_retval[0] = bsd_setsockopt_args.s; } return retval_socket; } struct linux_bind_args { int s; struct sockaddr *name; int namelen; }; static int linux_bind(struct proc *p, struct linux_bind_args *args) { struct linux_bind_args linux_args; struct bind_args /* { int s; caddr_t name; int namelen; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.name = (caddr_t)linux_args.name; bsd_args.namelen = linux_args.namelen; return bind(p, &bsd_args); } struct linux_connect_args { int s; struct sockaddr * name; int namelen; }; static int linux_connect(struct proc *p, struct linux_connect_args *args) { struct linux_connect_args linux_args; struct connect_args /* { int s; caddr_t name; int namelen; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.name = (caddr_t)linux_args.name; bsd_args.namelen = linux_args.namelen; return connect(p, &bsd_args); } struct linux_listen_args { int s; int backlog; }; static int linux_listen(struct proc *p, struct linux_listen_args *args) { struct linux_listen_args linux_args; struct listen_args /* { int s; int backlog; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.backlog = linux_args.backlog; return listen(p, &bsd_args); } struct linux_accept_args { int s; struct sockaddr *addr; int *namelen; }; static int linux_accept(struct proc *p, struct linux_accept_args *args) { struct linux_accept_args linux_args; struct accept_args /* { int s; caddr_t name; int *anamelen; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.name = (caddr_t)linux_args.addr; bsd_args.anamelen = linux_args.namelen; return oaccept(p, &bsd_args); } struct linux_getsockname_args { int s; struct sockaddr *addr; int *namelen; }; static int linux_getsockname(struct proc *p, struct linux_getsockname_args *args) { struct linux_getsockname_args linux_args; struct getsockname_args /* { int fdes; caddr_t asa; int *alen; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.fdes = linux_args.s; bsd_args.asa = (caddr_t) linux_args.addr; bsd_args.alen = linux_args.namelen; return ogetsockname(p, &bsd_args); } struct linux_getpeername_args { int s; struct sockaddr *addr; int *namelen; }; static int linux_getpeername(struct proc *p, struct linux_getpeername_args *args) { struct linux_getpeername_args linux_args; struct ogetpeername_args /* { int fdes; caddr_t asa; int *alen; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.fdes = linux_args.s; bsd_args.asa = (caddr_t) linux_args.addr; bsd_args.alen = linux_args.namelen; return ogetpeername(p, &bsd_args); } struct linux_socketpair_args { int domain; int type; int protocol; int *rsv; }; static int linux_socketpair(struct proc *p, struct linux_socketpair_args *args) { struct linux_socketpair_args linux_args; struct socketpair_args /* { int domain; int type; int protocol; int *rsv; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.domain = linux_to_bsd_domain(linux_args.domain); if (bsd_args.domain == -1) return EINVAL; bsd_args.type = linux_args.type; bsd_args.protocol = linux_args.protocol; bsd_args.rsv = linux_args.rsv; return socketpair(p, &bsd_args); } struct linux_send_args { int s; void *msg; int len; int flags; }; static int linux_send(struct proc *p, struct linux_send_args *args) { struct linux_send_args linux_args; struct osend_args /* { int s; caddr_t buf; int len; int flags; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.buf = linux_args.msg; bsd_args.len = linux_args.len; bsd_args.flags = linux_args.flags; return osend(p, &bsd_args); } struct linux_recv_args { int s; void *msg; int len; int flags; }; static int linux_recv(struct proc *p, struct linux_recv_args *args) { struct linux_recv_args linux_args; struct orecv_args /* { int s; caddr_t buf; int len; int flags; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.buf = linux_args.msg; bsd_args.len = linux_args.len; bsd_args.flags = linux_args.flags; return orecv(p, &bsd_args); } struct linux_sendto_args { int s; void *msg; int len; int flags; caddr_t to; int tolen; }; static int linux_sendto(struct proc *p, struct linux_sendto_args *args) { struct linux_sendto_args linux_args; struct sendto_args /* { int s; caddr_t buf; size_t len; int flags; caddr_t to; int tolen; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.buf = linux_args.msg; bsd_args.len = linux_args.len; bsd_args.flags = linux_args.flags; bsd_args.to = linux_args.to; bsd_args.tolen = linux_args.tolen; if (linux_check_hdrincl(p, linux_args.s) == 0) /* IP_HDRINCL set, tweak the packet before sending */ return linux_sendto_hdrincl(p, &bsd_args); return sendto(p, &bsd_args); } struct linux_recvfrom_args { int s; void *buf; int len; int flags; caddr_t from; int *fromlen; }; static int linux_recvfrom(struct proc *p, struct linux_recvfrom_args *args) { struct linux_recvfrom_args linux_args; struct recvfrom_args /* { int s; caddr_t buf; size_t len; int flags; caddr_t from; int *fromlenaddr; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.buf = linux_args.buf; bsd_args.len = linux_args.len; bsd_args.flags = linux_args.flags; bsd_args.from = linux_args.from; bsd_args.fromlenaddr = linux_args.fromlen; return orecvfrom(p, &bsd_args); } struct linux_shutdown_args { int s; int how; }; static int linux_shutdown(struct proc *p, struct linux_shutdown_args *args) { struct linux_shutdown_args linux_args; struct shutdown_args /* { int s; int how; } */ bsd_args; int error; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.how = linux_args.how; return shutdown(p, &bsd_args); } struct linux_setsockopt_args { int s; int level; int optname; void *optval; int optlen; }; static int linux_setsockopt(struct proc *p, struct linux_setsockopt_args *args) { struct linux_setsockopt_args linux_args; struct setsockopt_args /* { int s; int level; int name; caddr_t val; int valsize; } */ bsd_args; int error, name; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level); switch (bsd_args.level) { case SOL_SOCKET: name = linux_to_bsd_so_sockopt(linux_args.optname); break; case IPPROTO_IP: name = linux_to_bsd_ip_sockopt(linux_args.optname); break; default: return EINVAL; } if (name == -1) return EINVAL; bsd_args.name = name; bsd_args.val = linux_args.optval; bsd_args.valsize = linux_args.optlen; return setsockopt(p, &bsd_args); } struct linux_getsockopt_args { int s; int level; int optname; void *optval; int *optlen; }; static int linux_getsockopt(struct proc *p, struct linux_getsockopt_args *args) { struct linux_getsockopt_args linux_args; struct getsockopt_args /* { int s; int level; int name; caddr_t val; int *avalsize; } */ bsd_args; int error, name; if ((error=copyin((caddr_t)args, (caddr_t)&linux_args, sizeof(linux_args)))) return error; bsd_args.s = linux_args.s; bsd_args.level = linux_to_bsd_sockopt_level(linux_args.level); switch (bsd_args.level) { case SOL_SOCKET: name = linux_to_bsd_so_sockopt(linux_args.optname); break; case IPPROTO_IP: name = linux_to_bsd_ip_sockopt(linux_args.optname); break; default: return EINVAL; } if (name == -1) return EINVAL; bsd_args.name = name; bsd_args.val = linux_args.optval; bsd_args.avalsize = linux_args.optlen; return getsockopt(p, &bsd_args); } int linux_socketcall(struct proc *p, struct linux_socketcall_args *args) { switch (args->what) { case LINUX_SOCKET: return linux_socket(p, args->args); case LINUX_BIND: return linux_bind(p, args->args); case LINUX_CONNECT: return linux_connect(p, args->args); case LINUX_LISTEN: return linux_listen(p, args->args); case LINUX_ACCEPT: return linux_accept(p, args->args); case LINUX_GETSOCKNAME: return linux_getsockname(p, args->args); case LINUX_GETPEERNAME: return linux_getpeername(p, args->args); case LINUX_SOCKETPAIR: return linux_socketpair(p, args->args); case LINUX_SEND: return linux_send(p, args->args); case LINUX_RECV: return linux_recv(p, args->args); case LINUX_SENDTO: return linux_sendto(p, args->args); case LINUX_RECVFROM: return linux_recvfrom(p, args->args); case LINUX_SHUTDOWN: return linux_shutdown(p, args->args); case LINUX_SETSOCKOPT: return linux_setsockopt(p, args->args); case LINUX_GETSOCKOPT: return linux_getsockopt(p, args->args); default: uprintf("LINUX: 'socket' typ=%d not implemented\n", args->what); return ENOSYS; } }