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-rw-r--r--net/ipv6/raw.c124
1 files changed, 63 insertions, 61 deletions
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 896af88..ee25631 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -486,13 +486,13 @@ static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk,
}
if (skb_csum_unnecessary(skb)) {
- err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+ err = skb_copy_datagram_msg(skb, 0, msg, copied);
} else if (msg->msg_flags&MSG_TRUNC) {
if (__skb_checksum_complete(skb))
goto csum_copy_err;
- err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+ err = skb_copy_datagram_msg(skb, 0, msg, copied);
} else {
- err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov);
+ err = skb_copy_and_csum_datagram_msg(skb, 0, msg);
if (err == -EINVAL)
goto csum_copy_err;
}
@@ -548,7 +548,8 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
if (!rp->checksum)
goto send;
- if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
+ skb = skb_peek(&sk->sk_write_queue);
+ if (!skb)
goto out;
offset = rp->offset;
@@ -671,65 +672,62 @@ error:
return err;
}
-static int rawv6_probe_proto_opt(struct flowi6 *fl6, struct msghdr *msg)
+struct raw6_frag_vec {
+ struct msghdr *msg;
+ int hlen;
+ char c[4];
+};
+
+static int rawv6_probe_proto_opt(struct raw6_frag_vec *rfv, struct flowi6 *fl6)
{
- struct iovec *iov;
- u8 __user *type = NULL;
- u8 __user *code = NULL;
- u8 len = 0;
- int probed = 0;
- int i;
-
- if (!msg->msg_iov)
- return 0;
+ int err = 0;
+ switch (fl6->flowi6_proto) {
+ case IPPROTO_ICMPV6:
+ rfv->hlen = 2;
+ err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
+ if (!err) {
+ fl6->fl6_icmp_type = rfv->c[0];
+ fl6->fl6_icmp_code = rfv->c[1];
+ }
+ break;
+ case IPPROTO_MH:
+ rfv->hlen = 4;
+ err = memcpy_from_msg(rfv->c, rfv->msg, rfv->hlen);
+ if (!err)
+ fl6->fl6_mh_type = rfv->c[2];
+ }
+ return err;
+}
- for (i = 0; i < msg->msg_iovlen; i++) {
- iov = &msg->msg_iov[i];
- if (!iov)
- continue;
+static int raw6_getfrag(void *from, char *to, int offset, int len, int odd,
+ struct sk_buff *skb)
+{
+ struct raw6_frag_vec *rfv = from;
- switch (fl6->flowi6_proto) {
- case IPPROTO_ICMPV6:
- /* check if one-byte field is readable or not. */
- if (iov->iov_base && iov->iov_len < 1)
- break;
-
- if (!type) {
- type = iov->iov_base;
- /* check if code field is readable or not. */
- if (iov->iov_len > 1)
- code = type + 1;
- } else if (!code)
- code = iov->iov_base;
-
- if (type && code) {
- if (get_user(fl6->fl6_icmp_type, type) ||
- get_user(fl6->fl6_icmp_code, code))
- return -EFAULT;
- probed = 1;
- }
- break;
- case IPPROTO_MH:
- if (iov->iov_base && iov->iov_len < 1)
- break;
- /* check if type field is readable or not. */
- if (iov->iov_len > 2 - len) {
- u8 __user *p = iov->iov_base;
- if (get_user(fl6->fl6_mh_type, &p[2 - len]))
- return -EFAULT;
- probed = 1;
- } else
- len += iov->iov_len;
+ if (offset < rfv->hlen) {
+ int copy = min(rfv->hlen - offset, len);
- break;
- default:
- probed = 1;
- break;
- }
- if (probed)
- break;
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
+ memcpy(to, rfv->c + offset, copy);
+ else
+ skb->csum = csum_block_add(
+ skb->csum,
+ csum_partial_copy_nocheck(rfv->c + offset,
+ to, copy, 0),
+ odd);
+
+ odd = 0;
+ offset += copy;
+ to += copy;
+ len -= copy;
+
+ if (!len)
+ return 0;
}
- return 0;
+
+ offset -= rfv->hlen;
+
+ return ip_generic_getfrag(rfv->msg, to, offset, len, odd, skb);
}
static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
@@ -744,6 +742,7 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
struct ipv6_txoptions *opt = NULL;
struct ip6_flowlabel *flowlabel = NULL;
struct dst_entry *dst = NULL;
+ struct raw6_frag_vec rfv;
struct flowi6 fl6;
int addr_len = msg->msg_namelen;
int hlimit = -1;
@@ -847,7 +846,9 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
opt = ipv6_fixup_options(&opt_space, opt);
fl6.flowi6_proto = proto;
- err = rawv6_probe_proto_opt(&fl6, msg);
+ rfv.msg = msg;
+ rfv.hlen = 0;
+ err = rawv6_probe_proto_opt(&rfv, &fl6);
if (err)
goto out;
@@ -885,10 +886,11 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
back_from_confirm:
if (inet->hdrincl)
- err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
+ /* XXX: stripping const */
+ err = rawv6_send_hdrinc(sk, (struct iovec *)msg->msg_iter.iov, len, &fl6, &dst, msg->msg_flags);
else {
lock_sock(sk);
- err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov,
+ err = ip6_append_data(sk, raw6_getfrag, &rfv,
len, 0, hlimit, tclass, opt, &fl6, (struct rt6_info *)dst,
msg->msg_flags, dontfrag);
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