diff options
Diffstat (limited to 'examples/nfct-mnl-set-label.c')
| -rw-r--r-- | examples/nfct-mnl-set-label.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/examples/nfct-mnl-set-label.c b/examples/nfct-mnl-set-label.c index c52b267..50bebb0 100644 --- a/examples/nfct-mnl-set-label.c +++ b/examples/nfct-mnl-set-label.c @@ -19,6 +19,7 @@ static void set_label(struct nf_conntrack *ct, struct callback_args *cbargs) char buf[MNL_SOCKET_BUFFER_SIZE]; struct nlmsghdr *nlh; struct nfgenmsg *nfh; + int ret; if (b) { if (bit < 0) @@ -55,7 +56,11 @@ static void set_label(struct nf_conntrack *ct, struct callback_args *cbargs) nfh->version = NFNETLINK_V0; nfh->res_id = 0; - nfct_nlmsg_build(nlh, ct); + ret = nfct_nlmsg_build(nlh, ct); + if (ret == -1) { + perror("nfct_nlmsg_build"); + exit(EXIT_FAILURE); + } if (mnl_socket_sendto(cbargs->nl, nlh, nlh->nlmsg_len) < 0) perror("mnl_socket_sendto"); |