* [PATCH nft 2/7,v4] mnl: mnl_set_rcvbuffer() skips buffer size update if it is too small
@ 2019-05-31 10:20 Pablo Neira Ayuso
0 siblings, 0 replies; only message in thread
From: Pablo Neira Ayuso @ 2019-05-31 10:20 UTC (permalink / raw)
To: netfilter-devel; +Cc: phil
Check for existing buffer size, if this is larger than the newer buffer
size, skip this size update.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
src/mnl.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/src/mnl.c b/src/mnl.c
index 288a887df097..859c7d770748 100644
--- a/src/mnl.c
+++ b/src/mnl.c
@@ -233,10 +233,21 @@ static void mnl_set_sndbuffer(const struct mnl_socket *nl,
nlbuffsiz = newbuffsiz;
}
+static unsigned int nlsndbufsiz;
+
static int mnl_set_rcvbuffer(const struct mnl_socket *nl, size_t bufsiz)
{
+ socklen_t len = sizeof(nlsndbufsiz);
int ret;
+ if (!nlsndbufsiz) {
+ getsockopt(mnl_socket_get_fd(nl), SOL_SOCKET, SO_RCVBUF,
+ &nlsndbufsiz, &len);
+ }
+
+ if (nlsndbufsiz >= bufsiz)
+ return 0;
+
ret = setsockopt(mnl_socket_get_fd(nl), SOL_SOCKET, SO_RCVBUFFORCE,
&bufsiz, sizeof(socklen_t));
if (ret < 0) {
--
2.11.0
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2019-05-31 10:20 [PATCH nft 2/7,v4] mnl: mnl_set_rcvbuffer() skips buffer size update if it is too small Pablo Neira Ayuso
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