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Index: sys/netinet/siftr.c
===================================================================
--- sys/netinet/siftr.c
+++ sys/netinet/siftr.c
@@ -272,6 +272,7 @@
static unsigned int siftr_enabled = 0;
static unsigned int siftr_pkts_per_log = 1;
static unsigned int siftr_generate_hashes = 0;
+static uint16_t siftr_port_filter = 0;
/* static unsigned int siftr_binary_log = 0; */
static char siftr_logfile[PATH_MAX] = "/var/log/siftr.log";
static char siftr_logfile_shadow[PATH_MAX] = "/var/log/siftr.log";
@@ -317,6 +318,10 @@
&siftr_generate_hashes, 0,
"enable packet hash generation");
+SYSCTL_U16(_net_inet_siftr, OID_AUTO, port_filter, CTLFLAG_RW,
+ &siftr_port_filter, 0,
+ "enable packet filter on a TCP port");
+
/* XXX: TODO
SYSCTL_UINT(_net_inet_siftr, OID_AUTO, binary, CTLFLAG_RW,
&siftr_binary_log, 0,
@@ -907,6 +912,16 @@
goto inp_unlock;
}
+ /*
+ * Only pkts selected by the tcp port filter
+ * can be inserted into the pkt_queue
+ */
+ if ((siftr_port_filter != 0) &&
+ (siftr_port_filter != ntohs(inp->inp_lport)) &&
+ (siftr_port_filter != ntohs(inp->inp_fport))) {
+ goto inp_unlock;
+ }
+
pn = malloc(sizeof(struct pkt_node), M_SIFTR_PKTNODE, M_NOWAIT|M_ZERO);
if (pn == NULL) {
@@ -1083,6 +1098,15 @@
goto inp_unlock6;
}
+ /*
+ * Only pkts selected by the tcp port filter
+ * can be inserted into the pkt_queue
+ */
+ if ((siftr_port_filter != 0) && (siftr_port_filter != ntohs(inp->inp_lport)) &&
+ (siftr_port_filter != ntohs(inp->inp_fport))) {
+ goto inp_unlock6;
+ }
+
pn = malloc(sizeof(struct pkt_node), M_SIFTR_PKTNODE, M_NOWAIT|M_ZERO);
if (pn == NULL) {

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