463 lines
12 KiB
C
463 lines
12 KiB
C
/* $Id: socket.c,v 1.6 2002/02/08 03:57:14 davem Exp $
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* socket.c: Socket syscall emulation for Solaris 2.6+
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*
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* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
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*
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* 1999-08-19 Fixed socketpair code
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* Jason Rappleye (rappleye@ccr.buffalo.edu)
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*/
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#include <linux/types.h>
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#include <linux/smp_lock.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/socket.h>
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#include <linux/file.h>
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#include <linux/net.h>
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#include <linux/compat.h>
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#include <net/compat.h>
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#include <net/sock.h>
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#include <asm/uaccess.h>
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#include <asm/string.h>
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#include <asm/oplib.h>
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#include <asm/idprom.h>
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#include "conv.h"
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#define SOCK_SOL_STREAM 2
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#define SOCK_SOL_DGRAM 1
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#define SOCK_SOL_RAW 4
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#define SOCK_SOL_RDM 5
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#define SOCK_SOL_SEQPACKET 6
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#define SOL_SO_SNDLOWAT 0x1003
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#define SOL_SO_RCVLOWAT 0x1004
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#define SOL_SO_SNDTIMEO 0x1005
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#define SOL_SO_RCVTIMEO 0x1006
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#define SOL_SO_STATE 0x2000
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#define SOL_SS_NDELAY 0x040
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#define SOL_SS_NONBLOCK 0x080
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#define SOL_SS_ASYNC 0x100
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#define SO_STATE 0x000e
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static int socket_check(int family, int type)
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{
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if (family != PF_UNIX && family != PF_INET)
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return -ESOCKTNOSUPPORT;
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switch (type) {
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case SOCK_SOL_STREAM: type = SOCK_STREAM; break;
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case SOCK_SOL_DGRAM: type = SOCK_DGRAM; break;
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case SOCK_SOL_RAW: type = SOCK_RAW; break;
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case SOCK_SOL_RDM: type = SOCK_RDM; break;
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case SOCK_SOL_SEQPACKET: type = SOCK_SEQPACKET; break;
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default: return -EINVAL;
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}
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return type;
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}
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static int solaris_to_linux_sockopt(int optname)
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{
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switch (optname) {
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case SOL_SO_SNDLOWAT: optname = SO_SNDLOWAT; break;
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case SOL_SO_RCVLOWAT: optname = SO_RCVLOWAT; break;
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case SOL_SO_SNDTIMEO: optname = SO_SNDTIMEO; break;
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case SOL_SO_RCVTIMEO: optname = SO_RCVTIMEO; break;
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case SOL_SO_STATE: optname = SO_STATE; break;
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};
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return optname;
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}
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asmlinkage int solaris_socket(int family, int type, int protocol)
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{
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int (*sys_socket)(int, int, int) =
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(int (*)(int, int, int))SYS(socket);
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type = socket_check (family, type);
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if (type < 0) return type;
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return sys_socket(family, type, protocol);
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}
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asmlinkage int solaris_socketpair(int *usockvec)
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{
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int (*sys_socketpair)(int, int, int, int *) =
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(int (*)(int, int, int, int *))SYS(socketpair);
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/* solaris socketpair really only takes one arg at the syscall
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* level, int * usockvec. The libs apparently take care of
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* making sure that family==AF_UNIX and type==SOCK_STREAM. The
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* pointer we really want ends up residing in the first (and
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* supposedly only) argument.
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*/
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return sys_socketpair(AF_UNIX, SOCK_STREAM, 0, (int *)usockvec);
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}
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asmlinkage int solaris_bind(int fd, struct sockaddr *addr, int addrlen)
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{
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int (*sys_bind)(int, struct sockaddr *, int) =
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(int (*)(int, struct sockaddr *, int))SUNOS(104);
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return sys_bind(fd, addr, addrlen);
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}
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asmlinkage int solaris_setsockopt(int fd, int level, int optname, u32 optval, int optlen)
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{
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int (*sunos_setsockopt)(int, int, int, u32, int) =
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(int (*)(int, int, int, u32, int))SUNOS(105);
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optname = solaris_to_linux_sockopt(optname);
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if (optname < 0)
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return optname;
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if (optname == SO_STATE)
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return 0;
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return sunos_setsockopt(fd, level, optname, optval, optlen);
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}
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asmlinkage int solaris_getsockopt(int fd, int level, int optname, u32 optval, u32 optlen)
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{
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int (*sunos_getsockopt)(int, int, int, u32, u32) =
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(int (*)(int, int, int, u32, u32))SUNOS(118);
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optname = solaris_to_linux_sockopt(optname);
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if (optname < 0)
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return optname;
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if (optname == SO_STATE)
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optname = SOL_SO_STATE;
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return sunos_getsockopt(fd, level, optname, optval, optlen);
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}
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asmlinkage int solaris_connect(int fd, struct sockaddr __user *addr, int addrlen)
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{
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int (*sys_connect)(int, struct sockaddr __user *, int) =
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(int (*)(int, struct sockaddr __user *, int))SYS(connect);
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return sys_connect(fd, addr, addrlen);
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}
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asmlinkage int solaris_accept(int fd, struct sockaddr __user *addr, int __user *addrlen)
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{
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int (*sys_accept)(int, struct sockaddr __user *, int __user *) =
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(int (*)(int, struct sockaddr __user *, int __user *))SYS(accept);
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return sys_accept(fd, addr, addrlen);
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}
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asmlinkage int solaris_listen(int fd, int backlog)
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{
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int (*sys_listen)(int, int) =
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(int (*)(int, int))SUNOS(106);
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return sys_listen(fd, backlog);
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}
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asmlinkage int solaris_shutdown(int fd, int how)
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{
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int (*sys_shutdown)(int, int) =
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(int (*)(int, int))SYS(shutdown);
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return sys_shutdown(fd, how);
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}
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#define MSG_SOL_OOB 0x1
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#define MSG_SOL_PEEK 0x2
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#define MSG_SOL_DONTROUTE 0x4
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#define MSG_SOL_EOR 0x8
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#define MSG_SOL_CTRUNC 0x10
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#define MSG_SOL_TRUNC 0x20
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#define MSG_SOL_WAITALL 0x40
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#define MSG_SOL_DONTWAIT 0x80
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static int solaris_to_linux_msgflags(int flags)
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{
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int fl = flags & (MSG_OOB|MSG_PEEK|MSG_DONTROUTE);
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if (flags & MSG_SOL_EOR) fl |= MSG_EOR;
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if (flags & MSG_SOL_CTRUNC) fl |= MSG_CTRUNC;
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if (flags & MSG_SOL_TRUNC) fl |= MSG_TRUNC;
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if (flags & MSG_SOL_WAITALL) fl |= MSG_WAITALL;
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if (flags & MSG_SOL_DONTWAIT) fl |= MSG_DONTWAIT;
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return fl;
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}
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static int linux_to_solaris_msgflags(int flags)
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{
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int fl = flags & (MSG_OOB|MSG_PEEK|MSG_DONTROUTE);
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if (flags & MSG_EOR) fl |= MSG_SOL_EOR;
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if (flags & MSG_CTRUNC) fl |= MSG_SOL_CTRUNC;
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if (flags & MSG_TRUNC) fl |= MSG_SOL_TRUNC;
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if (flags & MSG_WAITALL) fl |= MSG_SOL_WAITALL;
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if (flags & MSG_DONTWAIT) fl |= MSG_SOL_DONTWAIT;
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return fl;
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}
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asmlinkage int solaris_recvfrom(int s, char __user *buf, int len, int flags, u32 from, u32 fromlen)
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{
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int (*sys_recvfrom)(int, void __user *, size_t, unsigned, struct sockaddr __user *, int __user *) =
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(int (*)(int, void __user *, size_t, unsigned, struct sockaddr __user *, int __user *))SYS(recvfrom);
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return sys_recvfrom(s, buf, len, solaris_to_linux_msgflags(flags), A(from), A(fromlen));
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}
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asmlinkage int solaris_recv(int s, char __user *buf, int len, int flags)
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{
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int (*sys_recvfrom)(int, void __user *, size_t, unsigned, struct sockaddr __user *, int __user *) =
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(int (*)(int, void __user *, size_t, unsigned, struct sockaddr __user *, int __user *))SYS(recvfrom);
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return sys_recvfrom(s, buf, len, solaris_to_linux_msgflags(flags), NULL, NULL);
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}
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asmlinkage int solaris_sendto(int s, char __user *buf, int len, int flags, u32 to, u32 tolen)
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{
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int (*sys_sendto)(int, void __user *, size_t, unsigned, struct sockaddr __user *, int __user *) =
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(int (*)(int, void __user *, size_t, unsigned, struct sockaddr __user *, int __user *))SYS(sendto);
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return sys_sendto(s, buf, len, solaris_to_linux_msgflags(flags), A(to), A(tolen));
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}
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asmlinkage int solaris_send(int s, char *buf, int len, int flags)
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{
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int (*sys_sendto)(int, void *, size_t, unsigned, struct sockaddr *, int *) =
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(int (*)(int, void *, size_t, unsigned, struct sockaddr *, int *))SYS(sendto);
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return sys_sendto(s, buf, len, solaris_to_linux_msgflags(flags), NULL, NULL);
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}
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asmlinkage int solaris_getpeername(int fd, struct sockaddr *addr, int *addrlen)
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{
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int (*sys_getpeername)(int, struct sockaddr *, int *) =
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(int (*)(int, struct sockaddr *, int *))SYS(getpeername);
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return sys_getpeername(fd, addr, addrlen);
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}
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asmlinkage int solaris_getsockname(int fd, struct sockaddr *addr, int *addrlen)
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{
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int (*sys_getsockname)(int, struct sockaddr *, int *) =
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(int (*)(int, struct sockaddr *, int *))SYS(getsockname);
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return sys_getsockname(fd, addr, addrlen);
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}
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/* XXX This really belongs in some header file... -DaveM */
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#define MAX_SOCK_ADDR 128 /* 108 for Unix domain -
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16 for IP, 16 for IPX,
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24 for IPv6,
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about 80 for AX.25 */
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struct sol_nmsghdr {
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u32 msg_name;
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int msg_namelen;
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u32 msg_iov;
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u32 msg_iovlen;
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u32 msg_control;
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u32 msg_controllen;
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u32 msg_flags;
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};
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struct sol_cmsghdr {
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u32 cmsg_len;
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int cmsg_level;
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int cmsg_type;
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unsigned char cmsg_data[0];
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};
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static inline int msghdr_from_user32_to_kern(struct msghdr *kmsg,
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struct sol_nmsghdr __user *umsg)
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{
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u32 tmp1, tmp2, tmp3;
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int err;
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err = get_user(tmp1, &umsg->msg_name);
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err |= __get_user(tmp2, &umsg->msg_iov);
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err |= __get_user(tmp3, &umsg->msg_control);
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if (err)
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return -EFAULT;
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kmsg->msg_name = A(tmp1);
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kmsg->msg_iov = A(tmp2);
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kmsg->msg_control = A(tmp3);
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err = get_user(kmsg->msg_namelen, &umsg->msg_namelen);
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err |= get_user(kmsg->msg_controllen, &umsg->msg_controllen);
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err |= get_user(kmsg->msg_flags, &umsg->msg_flags);
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kmsg->msg_flags = solaris_to_linux_msgflags(kmsg->msg_flags);
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return err;
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}
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asmlinkage int solaris_sendmsg(int fd, struct sol_nmsghdr __user *user_msg, unsigned user_flags)
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{
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
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unsigned char ctl[sizeof(struct cmsghdr) + 20];
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unsigned char *ctl_buf = ctl;
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struct msghdr msg_sys;
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int err, ctl_len, iov_size, total_len;
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err = -EFAULT;
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if (msghdr_from_user32_to_kern(&msg_sys, user_msg))
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goto out;
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sock = sockfd_lookup(fd, &err);
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if (!sock)
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goto out;
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/* do not move before msg_sys is valid */
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err = -EMSGSIZE;
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if (msg_sys.msg_iovlen > UIO_MAXIOV)
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goto out_put;
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/* Check whether to allocate the iovec area*/
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err = -ENOMEM;
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iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
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if (msg_sys.msg_iovlen > UIO_FASTIOV) {
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iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
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if (!iov)
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goto out_put;
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}
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err = verify_compat_iovec(&msg_sys, iov, address, VERIFY_READ);
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if (err < 0)
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goto out_freeiov;
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total_len = err;
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err = -ENOBUFS;
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if (msg_sys.msg_controllen > INT_MAX)
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goto out_freeiov;
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ctl_len = msg_sys.msg_controllen;
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if (ctl_len) {
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struct sol_cmsghdr __user *ucmsg = msg_sys.msg_control;
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unsigned long *kcmsg;
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compat_size_t cmlen;
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err = -EINVAL;
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if (ctl_len <= sizeof(compat_size_t))
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goto out_freeiov;
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if (ctl_len > sizeof(ctl)) {
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err = -ENOBUFS;
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ctl_buf = kmalloc(ctl_len, GFP_KERNEL);
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if (!ctl_buf)
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goto out_freeiov;
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}
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__get_user(cmlen, &ucmsg->cmsg_len);
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kcmsg = (unsigned long *) ctl_buf;
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*kcmsg++ = (unsigned long)cmlen;
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err = -EFAULT;
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if (copy_from_user(kcmsg, &ucmsg->cmsg_level,
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ctl_len - sizeof(compat_size_t)))
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goto out_freectl;
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msg_sys.msg_control = ctl_buf;
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}
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msg_sys.msg_flags = solaris_to_linux_msgflags(user_flags);
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if (sock->file->f_flags & O_NONBLOCK)
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msg_sys.msg_flags |= MSG_DONTWAIT;
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err = sock_sendmsg(sock, &msg_sys, total_len);
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out_freectl:
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if (ctl_buf != ctl)
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sock_kfree_s(sock->sk, ctl_buf, ctl_len);
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out_freeiov:
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if (iov != iovstack)
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sock_kfree_s(sock->sk, iov, iov_size);
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out_put:
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sockfd_put(sock);
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out:
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return err;
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}
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asmlinkage int solaris_recvmsg(int fd, struct sol_nmsghdr __user *user_msg, unsigned int user_flags)
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{
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struct socket *sock;
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struct iovec iovstack[UIO_FASTIOV];
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struct iovec *iov = iovstack;
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struct msghdr msg_sys;
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unsigned long cmsg_ptr;
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int err, iov_size, total_len, len;
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/* kernel mode address */
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char addr[MAX_SOCK_ADDR];
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/* user mode address pointers */
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struct sockaddr __user *uaddr;
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int __user *uaddr_len;
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if (msghdr_from_user32_to_kern(&msg_sys, user_msg))
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return -EFAULT;
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sock = sockfd_lookup(fd, &err);
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if (!sock)
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goto out;
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err = -EMSGSIZE;
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if (msg_sys.msg_iovlen > UIO_MAXIOV)
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goto out_put;
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/* Check whether to allocate the iovec area*/
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err = -ENOMEM;
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iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
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if (msg_sys.msg_iovlen > UIO_FASTIOV) {
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iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
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if (!iov)
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goto out_put;
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}
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/*
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* Save the user-mode address (verify_iovec will change the
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* kernel msghdr to use the kernel address space)
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*/
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uaddr = (void __user *) msg_sys.msg_name;
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uaddr_len = &user_msg->msg_namelen;
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err = verify_compat_iovec(&msg_sys, iov, addr, VERIFY_WRITE);
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if (err < 0)
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goto out_freeiov;
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total_len = err;
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cmsg_ptr = (unsigned long) msg_sys.msg_control;
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msg_sys.msg_flags = MSG_CMSG_COMPAT;
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if (sock->file->f_flags & O_NONBLOCK)
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user_flags |= MSG_DONTWAIT;
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err = sock_recvmsg(sock, &msg_sys, total_len, user_flags);
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if(err < 0)
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goto out_freeiov;
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len = err;
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if (uaddr != NULL) {
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err = move_addr_to_user(addr, msg_sys.msg_namelen, uaddr, uaddr_len);
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if (err < 0)
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goto out_freeiov;
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}
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err = __put_user(linux_to_solaris_msgflags(msg_sys.msg_flags), &user_msg->msg_flags);
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if (err)
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goto out_freeiov;
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err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr,
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&user_msg->msg_controllen);
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if (err)
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goto out_freeiov;
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err = len;
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out_freeiov:
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if (iov != iovstack)
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sock_kfree_s(sock->sk, iov, iov_size);
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out_put:
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sockfd_put(sock);
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out:
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return err;
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}
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