zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/app/busybox/src/libbb/create_icmp_socket.c b/ap/app/busybox/src/libbb/create_icmp_socket.c
new file mode 100644
index 0000000..5856269
--- /dev/null
+++ b/ap/app/busybox/src/libbb/create_icmp_socket.c
@@ -0,0 +1,36 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * create raw socket for icmp protocol
+ * and drop root privileges if running setuid
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+
+#include "libbb.h"
+
+int FAST_FUNC create_icmp_socket(void)
+{
+ int sock;
+#if 0
+ struct protoent *proto;
+ proto = getprotobyname("icmp");
+ /* if getprotobyname failed, just silently force
+ * proto->p_proto to have the correct value for "icmp" */
+ sock = socket(AF_INET, SOCK_RAW,
+ (proto ? proto->p_proto : 1)); /* 1 == ICMP */
+#else
+ sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
+#endif
+ if (sock < 0) {
+ if (errno == EPERM)
+ bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
+ bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
+ }
+
+ /* drop root privs if running setuid */
+ xsetuid(getuid());
+
+ return sock;
+}