From 230b183921ecbaa5fedc0d35ad6ba7bb64b6e06a Mon Sep 17 00:00:00 2001 From: YOSHIFUJI Hideaki Date: Sat, 19 Jul 2008 22:35:47 -0700 Subject: 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 Signed-off-by: David S. Miller --- net/socket.c | 82 ++++++++++++++++++++++++++++++++++-------------------------- 1 file changed, 46 insertions(+), 36 deletions(-) (limited to 'net/socket.c') diff --git a/net/socket.c b/net/socket.c index 81fe82513046..1ba57d888981 100644 --- 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; -- cgit v1.2.1