1 files changed, 39 insertions, 0 deletions
diff --git a/libbb/create_icmp6_socket.c b/libbb/create_icmp6_socket.c
new file mode 100644
index 0000000..a095656
--- /dev/null
+++ b/libbb/create_icmp6_socket.c
@@ -0,0 +1,39 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * create raw socket for icmp (IPv6 version) protocol test permision
+ * and drop root privilegies if running setuid
+ *
+ */
+
+#include <sys/types.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <errno.h>
+#include <unistd.h>
+#include "libbb.h"
+
+#if CONFIG_FEATURE_IPV6
+int create_icmp6_socket(void)
+{
+	struct protoent *proto;
+	int sock;
+
+	proto = getprotobyname("ipv6-icmp");
+	/* if getprotobyname failed, just silently force
+	 * proto->p_proto to have the correct value for "ipv6-icmp" */
+	if ((sock = socket(AF_INET6, SOCK_RAW,
+			(proto ? proto->p_proto : IPPROTO_ICMPV6))) < 0) {
+		if (errno == EPERM)
+			error_msg_and_die("permission denied. (are you root?)");
+		else
+			perror_msg_and_die(can_not_create_raw_socket);
+	}
+
+	/* drop root privs if running setuid */
+	setuid(getuid());
+
+	return sock;
+}
+#endif