svn commit: r209845 - head/sys/netinet/ipfw
Gleb Smirnoff
glebius at FreeBSD.org
Fri Jul 9 11:27:33 UTC 2010
Author: glebius
Date: Fri Jul 9 11:27:33 2010
New Revision: 209845
URL: http://svn.freebsd.org/changeset/base/209845
Log:
Improve last commit: use bpf_mtap2() to avoiding stack usage.
Prodded by: julian
Modified:
head/sys/netinet/ipfw/ip_fw_log.c
Modified: head/sys/netinet/ipfw/ip_fw_log.c
==============================================================================
--- head/sys/netinet/ipfw/ip_fw_log.c Fri Jul 9 10:57:55 2010 (r209844)
+++ head/sys/netinet/ipfw/ip_fw_log.c Fri Jul 9 11:27:33 2010 (r209845)
@@ -152,24 +152,17 @@ ipfw_log(struct ip_fw *f, u_int hlen, st
if (V_fw_verbose == 0) {
#ifndef WITHOUT_BPF
- struct mbuf m0;
if (log_if == NULL || log_if->if_bpf == NULL)
return;
- /* BPF treats the "mbuf" as read-only */
- bzero(&m0, sizeof(struct mbuf));
- m0.m_hdr.mh_next = m;
- m0.m_hdr.mh_len = ETHER_HDR_LEN;
- if (args->eh) { /* layer2, use orig hdr */
- m0.m_hdr.mh_data = (char *)args->eh;
- } else {
- /* add fake header. Later we will store
- * more info in the header
+ if (args->eh) /* layer2, use orig hdr */
+ BPF_MTAP2(log_if, args->eh, ETHER_HDR_LEN, m);
+ else
+ /* Add fake header. Later we will store
+ * more info in the header.
*/
- m0.m_hdr.mh_data = "DDDDDDSSSSSS\x08\x00";
- }
- BPF_MTAP(log_if, &m0);
+ BPF_MTAP2(log_if, "DDDDDDSSSSSS\x08\x00", ETHER_HDR_LEN, m);
#endif /* !WITHOUT_BPF */
return;
}
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