1 files changed, 55 insertions, 0 deletions
diff --git a/rfc1035/rfc1035sameip.c b/rfc1035/rfc1035sameip.c
new file mode 100644
index 0000000..01a7e03
--- /dev/null
+++ b/rfc1035/rfc1035sameip.c
@@ -0,0 +1,55 @@
+/*
+** Copyright 1998 - 2000 Double Precision, Inc.
+** See COPYING for distribution information.
+*/
+#include	"config.h"
+#include	"rfc1035.h"
+#include	<sys/types.h>
+#include	<sys/socket.h>
+#include	<arpa/inet.h>
+#include	<errno.h>
+#include	<string.h>
+
+
+/*
+**	We have two socket addresses.  Did they come from the same IP
+**	address?
+*/
+
+#if RFC1035_IPV6
+
+int rfc1035_same_ip(const void *a, int al, const void *b, int bl)
+{
+char	bufa[INET6_ADDRSTRLEN];
+char	bufb[INET6_ADDRSTRLEN];
+struct	in6_addr in6a;
+struct	in6_addr in6b;
+const char *as, *bs;
+
+	if (rfc1035_sockaddrip(a, al, &in6a) ||
+		rfc1035_sockaddrip(b, bl, &in6b) ||
+		(as=inet_ntop(AF_INET6, &in6a, bufa, sizeof(bufa))) == 0 ||
+		(bs=inet_ntop(AF_INET6, &in6b, bufb, sizeof(bufb))) == 0 ||
+		strcmp(as, bs))
+		return (0);
+	return (1);
+}
+
+#else
+
+int rfc1035_same_ip(const void *a, int al, const void *b, int bl)
+{
+	if ( ((const struct sockaddr_in *)a)->sin_family != AF_INET ||
+		((const struct sockaddr_in *)b)->sin_family != AF_INET ||
+		al < sizeof(struct sockaddr_in) ||
+		bl < sizeof(struct sockaddr_in))
+	{
+		return (0);
+	}
+
+	return ( ((const struct sockaddr_in *)a)->sin_addr.s_addr ==
+		((const struct sockaddr_in *)b)->sin_addr.s_addr);
+}
+
+#endif
+