Check for existing buffer size, if this is larger than the requested new
buffer size, skip the buffer size update.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
src/mnl.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/mnl.c b/src/mnl.c
index 288a887df097..a84a6a609333 100644
--- a/src/mnl.c
+++ b/src/mnl.c
@@ -235,8 +235,15 @@ static void mnl_set_sndbuffer(const struct mnl_socket *nl,
static int mnl_set_rcvbuffer(const struct mnl_socket *nl, size_t bufsiz)
{
+ size_t cur_bufsiz;
+ socklen_t len;
int ret;
+ ret = getsockopt(mnl_socket_get_fd(nl), SOL_SOCKET, SO_RCVBUF,
+ &cur_bufsiz, &len);
+ if (cur_bufsiz > bufsiz)
+ return 0;
+
ret = setsockopt(mnl_socket_get_fd(nl), SOL_SOCKET, SO_RCVBUFFORCE,
&bufsiz, sizeof(socklen_t));
if (ret < 0) {
--
2.11.0
