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Diffstat (limited to 'libbb/create_icmp6_socket.c')
-rw-r--r--libbb/create_icmp6_socket.c39
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