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authorCong Wang <cwang@twopensource.com>2014-10-15 21:33:21 (GMT)
committerDavid S. Miller <davem@davemloft.net>2014-10-17 16:02:57 (GMT)
commite25f866fbc8a4bf387b5dbe8e25aa5b07e55c74f (patch)
treedf2c77e0b95e195dc496bba98155e2c62b9a80cd /include
parent2077eebf7d8bf20b36524de45851e28111a60c52 (diff)
ipv4: share tcp_v4_save_options() with cookie_v4_check()
cookie_v4_check() allocates ip_options_rcu in the same way with tcp_v4_save_options(), we can just make it a helper function. Cc: Krzysztof Kolasa <kkolasa@winsoft.pl> Cc: Eric Dumazet <edumazet@google.com> Signed-off-by: Cong Wang <cwang@twopensource.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/tcp.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 74efeda..869637a 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1666,4 +1666,24 @@ int tcpv4_offload_init(void);
void tcp_v4_init(void);
void tcp_init(void);
+/*
+ * Save and compile IPv4 options, return a pointer to it
+ */
+static inline struct ip_options_rcu *tcp_v4_save_options(struct sk_buff *skb)
+{
+ const struct ip_options *opt = &TCP_SKB_CB(skb)->header.h4.opt;
+ struct ip_options_rcu *dopt = NULL;
+
+ if (opt && opt->optlen) {
+ int opt_size = sizeof(*dopt) + opt->optlen;
+
+ dopt = kmalloc(opt_size, GFP_ATOMIC);
+ if (dopt && __ip_options_echo(&dopt->opt, skb, opt)) {
+ kfree(dopt);
+ dopt = NULL;
+ }
+ }
+ return dopt;
+}
+
#endif /* _TCP_H */

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