1 files changed, 93 insertions, 0 deletions
diff --git a/lib/hostmask.c b/lib/hostmask.c
new file mode 100644
index 0000000..4ee41e16
--- /dev/null
+++ b/lib/hostmask.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 1993-2001 by Darren Reed.
+ *
+ * See the IPFILTER.LICENCE file for details on licencing.
+ *
+ * $Id: hostmask.c,v 1.10 2002/01/28 06:50:46 darrenr Exp $
+ */
+
+#include "ipf.h"
+
+
+/*
+ * returns -1 if neither "hostmask/num" or "hostmask mask addr" are
+ * found in the line segments, there is an error processing this information,
+ * or there is an error processing ports information.
+ */
+int	hostmask(seg, proto, ifname, sa, msk, linenum)
+char	***seg, *proto, *ifname;
+u_32_t	*sa, *msk;
+int	linenum;
+{
+	struct in_addr maskaddr;
+	char *s;
+
+	if ((s = strchr(**seg, '='))) {
+		*s++ = '\0';
+		if (!strcmp(**seg, "pool")) {
+			*sa = atoi(s);
+			return 1;
+		}
+	}
+
+	/*
+	 * is it possibly hostname/num ?
+	 */
+	if ((s = strchr(**seg, '/')) ||
+	    ((s = strchr(**seg, ':')) && !strchr(s + 1, ':'))) {
+		*s++ ='\0';
+		if (genmask(s, msk) == -1) {
+			fprintf(stderr, "%d: bad mask (%s)\n", linenum, s);
+			return -1;
+		}
+		if (hostnum(sa, **seg, linenum, ifname) == -1) {
+			fprintf(stderr, "%d: bad host (%s)\n", linenum, **seg);
+			return -1;
+		}
+		*sa &= *msk;
+		(*seg)++;
+		return 0;
+	}
+
+	/*
+	 * look for extra segments if "mask" found in right spot
+	 */
+	if (*(*seg+1) && *(*seg+2) && !strcasecmp(*(*seg+1), "mask")) {
+		if (hostnum(sa, **seg, linenum, ifname) == -1) {
+			fprintf(stderr, "%d: bad host (%s)\n", linenum, **seg);
+			return -1;
+		}
+		(*seg)++;
+		(*seg)++;
+		if (inet_aton(**seg, &maskaddr) == 0) {
+			fprintf(stderr, "%d: bad mask (%s)\n", linenum, **seg);
+			return -1;
+		}
+		*msk = maskaddr.s_addr;
+		(*seg)++;
+		*sa &= *msk;
+		return 0;
+	}
+
+	if (**seg) {
+		u_32_t k;
+
+		if (hostnum(sa, **seg, linenum, ifname) == -1) {
+			fprintf(stderr, "%d: bad host (%s)\n", linenum, **seg);
+			return -1;
+		}
+		(*seg)++;
+		k = *sa ? 0xffffffff : 0;
+#ifdef	USE_INET6
+		if (use_inet6) {
+			msk[1] = k;
+			msk[2] = k;
+			msk[3] = k;
+		}
+#endif
+		*msk = k;
+		return 0;
+	}
+	fprintf(stderr, "%d: bad host (%s)\n", linenum, **seg);
+	return -1;
+}