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net: Use standard structures for generic socket address structures.

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Use sockaddr_storage{} for generic socket address storage
and ensures proper alignment.
Use sockaddr{} for pointers to omit several casts.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2008-07-19 22:35:47 -07:00 committed by David S. Miller
parent 53b7997fd5
commit 230b183921
5 changed files with 52 additions and 42 deletions
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6
include/linux/socket.h
View file

@ -306,10 +306,10 @@ extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
int offset,
unsigned int len, __wsum *csump);
extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address, int mode);
extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
extern int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, int __user *ulen);
extern int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr);
extern int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, int __user *ulen);
extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr);
extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
#endif

2
include/net/compat.h
View file

@ -32,7 +32,7 @@ extern int compat_sock_get_timestampns(struct sock *, struct timespec __user *);
#endif /* defined(CONFIG_COMPAT) */
extern int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *);
extern int verify_compat_iovec(struct msghdr *, struct iovec *, char *, int);
extern int verify_compat_iovec(struct msghdr *, struct iovec *, struct sockaddr *, int);
extern asmlinkage long compat_sys_sendmsg(int,struct compat_msghdr __user *,unsigned);
extern asmlinkage long compat_sys_recvmsg(int,struct compat_msghdr __user *,unsigned);
extern asmlinkage long compat_sys_getsockopt(int, int, int, char __user *, int __user *);

2
net/compat.c
View file

@ -75,7 +75,7 @@ int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
/* I've named the args so it is easy to tell whose space the pointers are in. */
int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
char *kern_address, int mode)
struct sockaddr *kern_address, int mode)
{
int tot_len;

2
net/core/iovec.c
View file

@ -36,7 +36,7 @@
* in any case.
*/
int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode)
int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address, int mode)
{
int size, err, ct;

82
net/socket.c
View file

@ -180,9 +180,9 @@ static DEFINE_PER_CPU(int, sockets_in_use) = 0;
* invalid addresses -EFAULT is returned. On a success 0 is returned.
*/
int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr)
int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr)
{
if (ulen < 0 || ulen > MAX_SOCK_ADDR)
if (ulen < 0 || ulen > sizeof(struct sockaddr_storage))
return -EINVAL;
if (ulen == 0)
return 0;
@ -208,7 +208,7 @@ int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr)
* specified. Zero is returned for a success.
*/
int move_addr_to_user(void *kaddr, int klen, void __user *uaddr,
int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr,
int __user *ulen)
{
int err;
@ -219,7 +219,7 @@ int move_addr_to_user(void *kaddr, int klen, void __user *uaddr,
return err;
if (len > klen)
len = klen;
if (len < 0 || len > MAX_SOCK_ADDR)
if (len < 0 || len > sizeof(struct sockaddr_storage))
return -EINVAL;
if (len) {
if (audit_sockaddr(klen, kaddr))
@ -1342,20 +1342,20 @@ out_fd:
asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen)
{
struct socket *sock;
char address[MAX_SOCK_ADDR];
struct sockaddr_storage address;
int err, fput_needed;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (sock) {
err = move_addr_to_kernel(umyaddr, addrlen, address);
err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address);
if (err >= 0) {
err = security_socket_bind(sock,
(struct sockaddr *)address,
(struct sockaddr *)&address,
addrlen);
if (!err)
err = sock->ops->bind(sock,
(struct sockaddr *)
address, addrlen);
&address, addrlen);
}
fput_light(sock->file, fput_needed);
}
@ -1407,7 +1407,7 @@ asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr,
struct socket *sock, *newsock;
struct file *newfile;
int err, len, newfd, fput_needed;
char address[MAX_SOCK_ADDR];
struct sockaddr_storage address;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
@ -1446,13 +1446,13 @@ asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr,
goto out_fd;
if (upeer_sockaddr) {
if (newsock->ops->getname(newsock, (struct sockaddr *)address,
if (newsock->ops->getname(newsock, (struct sockaddr *)&address,
&len, 2) < 0) {
err = -ECONNABORTED;
goto out_fd;
}
err = move_addr_to_user(address, len, upeer_sockaddr,
upeer_addrlen);
err = move_addr_to_user((struct sockaddr *)&address,
len, upeer_sockaddr, upeer_addrlen);
if (err < 0)
goto out_fd;
}
@ -1495,22 +1495,22 @@ asmlinkage long sys_connect(int fd, struct sockaddr __user *uservaddr,
int addrlen)
{
struct socket *sock;
char address[MAX_SOCK_ADDR];
struct sockaddr_storage address;
int err, fput_needed;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
goto out;
err = move_addr_to_kernel(uservaddr, addrlen, address);
err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address);
if (err < 0)
goto out_put;
err =
security_socket_connect(sock, (struct sockaddr *)address, addrlen);
security_socket_connect(sock, (struct sockaddr *)&address, addrlen);
if (err)
goto out_put;
err = sock->ops->connect(sock, (struct sockaddr *)address, addrlen,
err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen,
sock->file->f_flags);
out_put:
fput_light(sock->file, fput_needed);
@ -1527,7 +1527,7 @@ asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr,
int __user *usockaddr_len)
{
struct socket *sock;
char address[MAX_SOCK_ADDR];
struct sockaddr_storage address;
int len, err, fput_needed;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
@ -1538,10 +1538,10 @@ asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr,
if (err)
goto out_put;
err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 0);
err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0);
if (err)
goto out_put;
err = move_addr_to_user(address, len, usockaddr, usockaddr_len);
err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len);
out_put:
fput_light(sock->file, fput_needed);
@ -1558,7 +1558,7 @@ asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr,
int __user *usockaddr_len)
{
struct socket *sock;
char address[MAX_SOCK_ADDR];
struct sockaddr_storage address;
int len, err, fput_needed;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
@ -1570,10 +1570,10 @@ asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr,
}
err =
sock->ops->getname(sock, (struct sockaddr *)address, &len,
sock->ops->getname(sock, (struct sockaddr *)&address, &len,
1);
if (!err)
err = move_addr_to_user(address, len, usockaddr,
err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr,
usockaddr_len);
fput_light(sock->file, fput_needed);
}
@ -1591,7 +1591,7 @@ asmlinkage long sys_sendto(int fd, void __user *buff, size_t len,
int addr_len)
{
struct socket *sock;
char address[MAX_SOCK_ADDR];
struct sockaddr_storage address;
int err;
struct msghdr msg;
struct iovec iov;
@ -1610,10 +1610,10 @@ asmlinkage long sys_sendto(int fd, void __user *buff, size_t len,
msg.msg_controllen = 0;
msg.msg_namelen = 0;
if (addr) {
err = move_addr_to_kernel(addr, addr_len, address);
err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address);
if (err < 0)
goto out_put;
msg.msg_name = address;
msg.msg_name = (struct sockaddr *)&address;
msg.msg_namelen = addr_len;
}
if (sock->file->f_flags & O_NONBLOCK)
@ -1649,7 +1649,7 @@ asmlinkage long sys_recvfrom(int fd, void __user *ubuf, size_t size,
struct socket *sock;
struct iovec iov;
struct msghdr msg;
char address[MAX_SOCK_ADDR];
struct sockaddr_storage address;
int err, err2;
int fput_needed;
@ -1663,14 +1663,15 @@ asmlinkage long sys_recvfrom(int fd, void __user *ubuf, size_t size,
msg.msg_iov = &iov;
iov.iov_len = size;
iov.iov_base = ubuf;
msg.msg_name = address;
msg.msg_namelen = MAX_SOCK_ADDR;
msg.msg_name = (struct sockaddr *)&address;
msg.msg_namelen = sizeof(address);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = sock_recvmsg(sock, &msg, size, flags);
if (err >= 0 && addr != NULL) {
err2 = move_addr_to_user(address, msg.msg_namelen, addr, addr_len);
err2 = move_addr_to_user((struct sockaddr *)&address,
msg.msg_namelen, addr, addr_len);
if (err2 < 0)
err = err2;
}
@ -1790,7 +1791,7 @@ asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags)
struct compat_msghdr __user *msg_compat =
(struct compat_msghdr __user *)msg;
struct socket *sock;
char address[MAX_SOCK_ADDR];
struct sockaddr_storage address;
struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
unsigned char ctl[sizeof(struct cmsghdr) + 20]
__attribute__ ((aligned(sizeof(__kernel_size_t))));
@ -1828,9 +1829,13 @@ asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags)
/* This will also move the address data into kernel space */
if (MSG_CMSG_COMPAT & flags) {
err = verify_compat_iovec(&msg_sys, iov, address, VERIFY_READ);
err = verify_compat_iovec(&msg_sys, iov,
(struct sockaddr *)&address,
VERIFY_READ);
} else
err = verify_iovec(&msg_sys, iov, address, VERIFY_READ);
err = verify_iovec(&msg_sys, iov,
(struct sockaddr *)&address,
VERIFY_READ);
if (err < 0)
goto out_freeiov;
total_len = err;
@ -1901,7 +1906,7 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg,
int fput_needed;
/* kernel mode address */
char addr[MAX_SOCK_ADDR];
struct sockaddr_storage addr;
/* user mode address pointers */
struct sockaddr __user *uaddr;
@ -1939,9 +1944,13 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg,
uaddr = (__force void __user *)msg_sys.msg_name;
uaddr_len = COMPAT_NAMELEN(msg);
if (MSG_CMSG_COMPAT & flags) {
err = verify_compat_iovec(&msg_sys, iov, addr, VERIFY_WRITE);
err = verify_compat_iovec(&msg_sys, iov,
(struct sockaddr *)&addr,
VERIFY_WRITE);
} else
err = verify_iovec(&msg_sys, iov, addr, VERIFY_WRITE);
err = verify_iovec(&msg_sys, iov,
(struct sockaddr *)&addr,
VERIFY_WRITE);
if (err < 0)
goto out_freeiov;
total_len = err;
@ -1957,7 +1966,8 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg,
len = err;
if (uaddr != NULL) {
err = move_addr_to_user(addr, msg_sys.msg_namelen, uaddr,
err = move_addr_to_user((struct sockaddr *)&addr,
msg_sys.msg_namelen, uaddr,
uaddr_len);
if (err < 0)
goto out_freeiov;