diff --git a/ipsvd/ipsvd_perhost.c b/ipsvd/ipsvd_perhost.c
new file mode 100644
index 0000000..c6f7de3
--- /dev/null
+++ b/ipsvd/ipsvd_perhost.c
@@ -0,0 +1,55 @@
+#include "busybox.h"
+#include "ipsvd_perhost.h"
+
+static struct hcc *cc;
+static unsigned cclen;
+
+/* to be optimized */
+
+void ipsvd_perhost_init(unsigned c)
+{
+//	free(cc);
+	cc = xzalloc(c * sizeof(*cc));
+	cclen = c;
+}
+
+unsigned ipsvd_perhost_add(const char *ip, unsigned maxconn, struct hcc **hccpp)
+{
+	unsigned i;
+	unsigned conn = 1;
+	int p = -1;
+
+	for (i = 0; i < cclen; ++i) {
+		if (cc[i].ip[0] == 0) {
+			if (p == -1) p = i;
+    			continue;
+		}
+		if (strncmp(cc[i].ip, ip, sizeof(cc[i].ip)) == 0) {
+			conn++;
+			continue;
+		}
+	}
+	if (p == -1) return 0;
+	if (conn <= maxconn) {
+		strcpy(cc[p].ip, ip);
+		*hccpp = &cc[p];
+	}
+	return conn;
+}
+
+void ipsvd_perhost_remove(int pid)
+{
+	unsigned i;
+	for (i = 0; i < cclen; ++i) {
+		if (cc[i].pid == pid) {
+			cc[i].ip[0] = 0;
+			cc[i].pid = 0;
+			return;
+		}
+	}
+}
+
+//void ipsvd_perhost_free(void)
+//{
+//	free(cc);
+//}