From bbe851eb15b19992ce5cc42990a33fe22325a236 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Thu, 30 May 2019 12:52:49 +0200 Subject: mnl: mnl_set_rcvbuffer() skips buffer size update if it is too small Check for existing buffer size, if this is larger than the newer buffer size, skip this size update. Signed-off-by: Pablo Neira Ayuso --- src/mnl.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'src') diff --git a/src/mnl.c b/src/mnl.c index 288a887d..859c7d77 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) { -- cgit v1.2.3