forked from Minki/linux
[SCTP] Fix sctp_get{pl}addrs() API to work with 32-bit apps on 64-bit kernels.
The old socket options are marked with a _OLD suffix so that the existing 32-bit apps on 32-bit kernels do not break. Signed-off-by: Ivan Skytte Jrgensen <isj-sctp@i1.dk> Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ivan Skytte Jrgensen
David S. Miller
parent
edb4a3534a
commit
5fe467ee97
@ -103,16 +103,20 @@ enum sctp_optname {
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#define SCTP_SOCKOPT_BINDX_REM SCTP_SOCKOPT_BINDX_REM
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SCTP_SOCKOPT_PEELOFF, /* peel off association. */
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#define SCTP_SOCKOPT_PEELOFF SCTP_SOCKOPT_PEELOFF
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SCTP_GET_PEER_ADDRS_NUM, /* Get number of peer addresss. */
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#define SCTP_GET_PEER_ADDRS_NUM SCTP_GET_PEER_ADDRS_NUM
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SCTP_GET_PEER_ADDRS, /* Get all peer addresss. */
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#define SCTP_GET_PEER_ADDRS SCTP_GET_PEER_ADDRS
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SCTP_GET_LOCAL_ADDRS_NUM, /* Get number of local addresss. */
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#define SCTP_GET_LOCAL_ADDRS_NUM SCTP_GET_LOCAL_ADDRS_NUM
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SCTP_GET_LOCAL_ADDRS, /* Get all local addresss. */
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#define SCTP_GET_LOCAL_ADDRS SCTP_GET_LOCAL_ADDRS
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SCTP_GET_PEER_ADDRS_NUM_OLD, /* Get number of peer addresss. */
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#define SCTP_GET_PEER_ADDRS_NUM_OLD SCTP_GET_PEER_ADDRS_NUM_OLD
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SCTP_GET_PEER_ADDRS_OLD, /* Get all peer addresss. */
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#define SCTP_GET_PEER_ADDRS_OLD SCTP_GET_PEER_ADDRS_OLD
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SCTP_GET_LOCAL_ADDRS_NUM_OLD, /* Get number of local addresss. */
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#define SCTP_GET_LOCAL_ADDRS_NUM_OLD SCTP_GET_LOCAL_ADDRS_NUM_OLD
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SCTP_GET_LOCAL_ADDRS_OLD, /* Get all local addresss. */
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#define SCTP_GET_LOCAL_ADDRS_OLD SCTP_GET_LOCAL_ADDRS_OLD
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SCTP_SOCKOPT_CONNECTX, /* CONNECTX requests. */
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#define SCTP_SOCKOPT_CONNECTX SCTP_SOCKOPT_CONNECTX
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SCTP_GET_PEER_ADDRS, /* Get all peer addresss. */
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#define SCTP_GET_PEER_ADDRS SCTP_GET_PEER_ADDRS
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SCTP_GET_LOCAL_ADDRS, /* Get all local addresss. */
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#define SCTP_GET_LOCAL_ADDRS SCTP_GET_LOCAL_ADDRS
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};
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/*
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@ -559,11 +563,16 @@ struct sctp_status {
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* SCTP_GET_LOCAL_ADDRS socket options used internally to implement
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* sctp_getpaddrs() and sctp_getladdrs() API.
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*/
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struct sctp_getaddrs {
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struct sctp_getaddrs_old {
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sctp_assoc_t assoc_id;
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int addr_num;
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struct sockaddr __user *addrs;
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};
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struct sctp_getaddrs {
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sctp_assoc_t assoc_id; /*input*/
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__u32 addr_num; /*output*/
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__u8 addrs[0]; /*output, variable size*/
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};
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/* These are bit fields for msghdr->msg_flags. See section 5.1. */
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/* On user space Linux, these live in <bits/socket.h> as an enum. */
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@ -3159,8 +3159,9 @@ static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval
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return 0;
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}
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static int sctp_getsockopt_peer_addrs_num(struct sock *sk, int len,
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char __user *optval, int __user *optlen)
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static int sctp_getsockopt_peer_addrs_num_old(struct sock *sk, int len,
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char __user *optval,
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int __user *optlen)
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{
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sctp_assoc_t id;
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struct sctp_association *asoc;
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@ -3185,23 +3186,28 @@ static int sctp_getsockopt_peer_addrs_num(struct sock *sk, int len,
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return cnt;
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}
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static int sctp_getsockopt_peer_addrs(struct sock *sk, int len,
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char __user *optval, int __user *optlen)
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/*
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* Old API for getting list of peer addresses. Does not work for 32-bit
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* programs running on a 64-bit kernel
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*/
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static int sctp_getsockopt_peer_addrs_old(struct sock *sk, int len,
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char __user *optval,
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int __user *optlen)
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{
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struct sctp_association *asoc;
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struct list_head *pos;
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int cnt = 0;
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struct sctp_getaddrs getaddrs;
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struct sctp_getaddrs_old getaddrs;
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struct sctp_transport *from;
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void __user *to;
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union sctp_addr temp;
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struct sctp_sock *sp = sctp_sk(sk);
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int addrlen;
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if (len != sizeof(struct sctp_getaddrs))
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if (len != sizeof(struct sctp_getaddrs_old))
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return -EINVAL;
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if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
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if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs_old)))
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return -EFAULT;
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if (getaddrs.addr_num <= 0) return -EINVAL;
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@ -3225,15 +3231,69 @@ static int sctp_getsockopt_peer_addrs(struct sock *sk, int len,
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if (cnt >= getaddrs.addr_num) break;
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}
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getaddrs.addr_num = cnt;
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if (copy_to_user(optval, &getaddrs, sizeof(struct sctp_getaddrs)))
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if (copy_to_user(optval, &getaddrs, sizeof(struct sctp_getaddrs_old)))
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return -EFAULT;
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return 0;
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}
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static int sctp_getsockopt_local_addrs_num(struct sock *sk, int len,
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char __user *optval,
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int __user *optlen)
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static int sctp_getsockopt_peer_addrs(struct sock *sk, int len,
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char __user *optval, int __user *optlen)
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{
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struct sctp_association *asoc;
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struct list_head *pos;
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int cnt = 0;
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struct sctp_getaddrs getaddrs;
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struct sctp_transport *from;
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void __user *to;
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union sctp_addr temp;
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struct sctp_sock *sp = sctp_sk(sk);
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int addrlen;
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size_t space_left;
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int bytes_copied;
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if (len < sizeof(struct sctp_getaddrs))
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return -EINVAL;
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if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
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return -EFAULT;
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/* For UDP-style sockets, id specifies the association to query. */
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asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
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if (!asoc)
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return -EINVAL;
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to = optval + offsetof(struct sctp_getaddrs,addrs);
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space_left = len - sizeof(struct sctp_getaddrs) -
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offsetof(struct sctp_getaddrs,addrs);
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list_for_each(pos, &asoc->peer.transport_addr_list) {
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from = list_entry(pos, struct sctp_transport, transports);
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memcpy(&temp, &from->ipaddr, sizeof(temp));
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sctp_get_pf_specific(sk->sk_family)->addr_v4map(sp, &temp);
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addrlen = sctp_get_af_specific(sk->sk_family)->sockaddr_len;
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if(space_left < addrlen)
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return -ENOMEM;
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temp.v4.sin_port = htons(temp.v4.sin_port);
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if (copy_to_user(to, &temp, addrlen))
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return -EFAULT;
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to += addrlen;
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cnt++;
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space_left -= addrlen;
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}
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if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num))
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return -EFAULT;
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bytes_copied = ((char __user *)to) - optval;
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if (put_user(bytes_copied, optlen))
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return -EFAULT;
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return 0;
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}
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static int sctp_getsockopt_local_addrs_num_old(struct sock *sk, int len,
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char __user *optval,
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int __user *optlen)
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{
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sctp_assoc_t id;
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struct sctp_bind_addr *bp;
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@ -3306,8 +3366,8 @@ done:
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/* Helper function that copies local addresses to user and returns the number
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* of addresses copied.
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*/
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static int sctp_copy_laddrs_to_user(struct sock *sk, __u16 port, int max_addrs,
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void __user *to)
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static int sctp_copy_laddrs_to_user_old(struct sock *sk, __u16 port, int max_addrs,
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void __user *to)
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{
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struct list_head *pos;
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struct sctp_sockaddr_entry *addr;
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@ -3341,14 +3401,54 @@ static int sctp_copy_laddrs_to_user(struct sock *sk, __u16 port, int max_addrs,
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return cnt;
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}
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static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
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char __user *optval, int __user *optlen)
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static int sctp_copy_laddrs_to_user(struct sock *sk, __u16 port,
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void * __user *to, size_t space_left)
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{
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struct list_head *pos;
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struct sctp_sockaddr_entry *addr;
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unsigned long flags;
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union sctp_addr temp;
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int cnt = 0;
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int addrlen;
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sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
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list_for_each(pos, &sctp_local_addr_list) {
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addr = list_entry(pos, struct sctp_sockaddr_entry, list);
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if ((PF_INET == sk->sk_family) &&
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(AF_INET6 == addr->a.sa.sa_family))
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continue;
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memcpy(&temp, &addr->a, sizeof(temp));
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sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk),
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&temp);
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addrlen = sctp_get_af_specific(temp.sa.sa_family)->sockaddr_len;
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if(space_left<addrlen)
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return -ENOMEM;
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temp.v4.sin_port = htons(port);
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if (copy_to_user(*to, &temp, addrlen)) {
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sctp_spin_unlock_irqrestore(&sctp_local_addr_lock,
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flags);
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return -EFAULT;
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}
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*to += addrlen;
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cnt ++;
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space_left -= addrlen;
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}
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sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
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return cnt;
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}
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/* Old API for getting list of local addresses. Does not work for 32-bit
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* programs running on a 64-bit kernel
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*/
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static int sctp_getsockopt_local_addrs_old(struct sock *sk, int len,
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char __user *optval, int __user *optlen)
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{
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struct sctp_bind_addr *bp;
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struct sctp_association *asoc;
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struct list_head *pos;
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int cnt = 0;
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struct sctp_getaddrs getaddrs;
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struct sctp_getaddrs_old getaddrs;
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struct sctp_sockaddr_entry *addr;
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void __user *to;
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union sctp_addr temp;
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@ -3357,10 +3457,10 @@ static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
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rwlock_t *addr_lock;
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int err = 0;
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if (len != sizeof(struct sctp_getaddrs))
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if (len != sizeof(struct sctp_getaddrs_old))
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return -EINVAL;
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if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
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if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs_old)))
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return -EFAULT;
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if (getaddrs.addr_num <= 0) return -EINVAL;
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@ -3392,8 +3492,9 @@ static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
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addr = list_entry(bp->address_list.next,
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struct sctp_sockaddr_entry, list);
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if (sctp_is_any(&addr->a)) {
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cnt = sctp_copy_laddrs_to_user(sk, bp->port,
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getaddrs.addr_num, to);
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cnt = sctp_copy_laddrs_to_user_old(sk, bp->port,
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getaddrs.addr_num,
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to);
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if (cnt < 0) {
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err = cnt;
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goto unlock;
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@ -3419,7 +3520,7 @@ static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
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copy_getaddrs:
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getaddrs.addr_num = cnt;
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if (copy_to_user(optval, &getaddrs, sizeof(struct sctp_getaddrs)))
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if (copy_to_user(optval, &getaddrs, sizeof(struct sctp_getaddrs_old)))
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err = -EFAULT;
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unlock:
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@ -3427,6 +3528,99 @@ unlock:
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return err;
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}
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static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
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char __user *optval, int __user *optlen)
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{
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struct sctp_bind_addr *bp;
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struct sctp_association *asoc;
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struct list_head *pos;
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int cnt = 0;
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struct sctp_getaddrs getaddrs;
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struct sctp_sockaddr_entry *addr;
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void __user *to;
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union sctp_addr temp;
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struct sctp_sock *sp = sctp_sk(sk);
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int addrlen;
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rwlock_t *addr_lock;
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int err = 0;
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size_t space_left;
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int bytes_copied;
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if (len <= sizeof(struct sctp_getaddrs))
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return -EINVAL;
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if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
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return -EFAULT;
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/*
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* For UDP-style sockets, id specifies the association to query.
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* If the id field is set to the value '0' then the locally bound
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* addresses are returned without regard to any particular
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* association.
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*/
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if (0 == getaddrs.assoc_id) {
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bp = &sctp_sk(sk)->ep->base.bind_addr;
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addr_lock = &sctp_sk(sk)->ep->base.addr_lock;
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} else {
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asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
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if (!asoc)
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return -EINVAL;
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bp = &asoc->base.bind_addr;
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addr_lock = &asoc->base.addr_lock;
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}
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to = optval + offsetof(struct sctp_getaddrs,addrs);
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space_left = len - sizeof(struct sctp_getaddrs) -
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offsetof(struct sctp_getaddrs,addrs);
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sctp_read_lock(addr_lock);
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/* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
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* addresses from the global local address list.
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*/
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if (sctp_list_single_entry(&bp->address_list)) {
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addr = list_entry(bp->address_list.next,
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struct sctp_sockaddr_entry, list);
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if (sctp_is_any(&addr->a)) {
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cnt = sctp_copy_laddrs_to_user(sk, bp->port,
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&to, space_left);
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if (cnt < 0) {
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err = cnt;
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goto unlock;
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}
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goto copy_getaddrs;
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}
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}
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list_for_each(pos, &bp->address_list) {
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addr = list_entry(pos, struct sctp_sockaddr_entry, list);
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memcpy(&temp, &addr->a, sizeof(temp));
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sctp_get_pf_specific(sk->sk_family)->addr_v4map(sp, &temp);
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addrlen = sctp_get_af_specific(temp.sa.sa_family)->sockaddr_len;
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if(space_left < addrlen)
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return -ENOMEM; /*fixme: right error?*/
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temp.v4.sin_port = htons(temp.v4.sin_port);
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if (copy_to_user(to, &temp, addrlen)) {
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err = -EFAULT;
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goto unlock;
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}
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to += addrlen;
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cnt ++;
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space_left -= addrlen;
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}
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copy_getaddrs:
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if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num))
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return -EFAULT;
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bytes_copied = ((char __user *)to) - optval;
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if (put_user(bytes_copied, optlen))
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return -EFAULT;
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unlock:
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sctp_read_unlock(addr_lock);
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return err;
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}
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/* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
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*
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* Requests that the local SCTP stack use the enclosed peer address as
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@ -3807,12 +4001,20 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
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case SCTP_INITMSG:
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retval = sctp_getsockopt_initmsg(sk, len, optval, optlen);
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break;
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case SCTP_GET_PEER_ADDRS_NUM:
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retval = sctp_getsockopt_peer_addrs_num(sk, len, optval,
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case SCTP_GET_PEER_ADDRS_NUM_OLD:
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retval = sctp_getsockopt_peer_addrs_num_old(sk, len, optval,
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optlen);
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break;
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case SCTP_GET_LOCAL_ADDRS_NUM_OLD:
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retval = sctp_getsockopt_local_addrs_num_old(sk, len, optval,
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optlen);
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break;
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case SCTP_GET_PEER_ADDRS_OLD:
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retval = sctp_getsockopt_peer_addrs_old(sk, len, optval,
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optlen);
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break;
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case SCTP_GET_LOCAL_ADDRS_NUM:
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retval = sctp_getsockopt_local_addrs_num(sk, len, optval,
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case SCTP_GET_LOCAL_ADDRS_OLD:
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retval = sctp_getsockopt_local_addrs_old(sk, len, optval,
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optlen);
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break;
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case SCTP_GET_PEER_ADDRS:
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