net: Use standard structures for generic socket address structures.

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>

diff --git a/include/linux/socket.h b/include/linux/socket.h
index bd2b30a..950af63 100644 (file)
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -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

diff --git a/include/net/compat.h b/include/net/compat.h
index 164cb68..5bbf8bf 100644 (file)
--- a/include/net/compat.h
+++ b/include/net/compat.h
@@ -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 *);

diff --git a/net/compat.c b/net/compat.c
index c823f6f..6e1b03b 100644 (file)
--- a/net/compat.c
+++ b/net/compat.c
@@ -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;
 

diff --git a/net/core/iovec.c b/net/core/iovec.c
index 755c37f..4c9c012 100644 (file)
--- a/net/core/iovec.c
+++ b/net/core/iovec.c
@@ -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;
 

diff --git a/net/socket.c b/net/socket.c
index 81fe825..1ba57d8 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -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;