1 files changed, 51 insertions, 0 deletions
diff --git a/src/network/lookup_ipliteral.c b/src/network/lookup_ipliteral.c
new file mode 100644
index 00000000..8dacffc1
--- /dev/null
+++ b/src/network/lookup_ipliteral.c
@@ -0,0 +1,51 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <net/if.h>
+#include <arpa/inet.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include "lookup.h"
+
+int __inet_aton(const char *, struct in_addr *);
+
+int __lookup_ipliteral(struct address buf[static 1], const char *name, int family)
+{
+	struct in_addr a4;
+	struct in6_addr a6;
+	if (family != AF_INET6 && __inet_aton(name, &a4)>0) {
+		memcpy(&buf[0].addr, &a4, sizeof a4);
+		buf[0].family = AF_INET;
+		buf[0].scopeid = 0;
+		return 1;
+	}
+	if (family != AF_INET) {
+		char tmp[64];
+		char *p = strchr(name, '%'), *z;
+		unsigned long long scopeid;
+		if (p && p-name < 64) {
+			memcpy(tmp, name, p-name);
+			tmp[p-name] = 0;
+			name = tmp;
+		}
+		if (inet_pton(AF_INET6, name, &a6)<=0) return 0;
+		memcpy(&buf[0].addr, &a6, sizeof a6);
+		buf[0].family = AF_INET6;
+		if (p) {
+			if (isdigit(*++p)) scopeid = strtoull(p, &z, 10);
+			else z = p-1;
+			if (*z) {
+				if (!IN6_IS_ADDR_LINKLOCAL(&a6) &&
+				    !IN6_IS_ADDR_MC_LINKLOCAL(&a6))
+					return EAI_NONAME;
+				scopeid = if_nametoindex(p);
+				if (!scopeid) return EAI_NONAME;
+			}
+			if (scopeid > UINT_MAX) return EAI_NONAME;
+			buf[0].scopeid = scopeid;
+		}
+		return 1;
+	}
+	return 0;
+}