path: root/include
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authorPablo Neira Ayuso <>2010-10-21 12:00:27 +0200
committerPablo Neira Ayuso <>2010-10-21 12:00:27 +0200
commit4eaebf5ef25f97cc6960da9f1a29b61737da8abd (patch)
treee28f06c05e5a722e3a2a6de4b42f54bc3d72a81a /include
parent781a9f058327730723525d3c4b85533920a00e9b (diff)
src: define MNL_SOCKET_BUFFER_SIZE to 8192UL
Davem spotted during the Netfilter Workshop that user-space applications should use 8KB buffers for recv(). I accidentally found that NFLOG is not following this approach (in this case we're using 131072 bytes messages), we have to document this. Anyway, according to linux/netlink.h (and to complete this log message): "skb should fit one page. This choice is good for headerless malloc. But we should limit to 8K so that userspace does not have to use enormous buffer sizes on recvmsg() calls just to avoid MSG_TRUNC when PAGE_SIZE is very large." Signed-off-by: Pablo Neira Ayuso <>
Diffstat (limited to 'include')
1 files changed, 1 insertions, 0 deletions
diff --git a/include/libmnl/libmnl.h b/include/libmnl/libmnl.h
index 09099a1..f658428 100644
--- a/include/libmnl/libmnl.h
+++ b/include/libmnl/libmnl.h
@@ -11,6 +11,7 @@
+#define MNL_SOCKET_BUFFER_SIZE 8192UL /* see linux/netlink.h */
struct mnl_socket;