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Diffstat (limited to 'i/pc104/initrd/conf/busybox/libbb/create_icmp_socket.c')
-rw-r--r--i/pc104/initrd/conf/busybox/libbb/create_icmp_socket.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/libbb/create_icmp_socket.c b/i/pc104/initrd/conf/busybox/libbb/create_icmp_socket.c
new file mode 100644
index 0000000..dbd4769
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/libbb/create_icmp_socket.c
@@ -0,0 +1,35 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * create raw socket for icmp protocol test permission
+ * and drop root privileges if running setuid
+ *
+ */
+
+#include <sys/types.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include "libbb.h"
+
+int create_icmp_socket(void)
+{
+ struct protoent *proto;
+ int sock;
+
+ 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 */
+ 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;
+}