This patch from Bart Visscher <magick@linux-fan.com> adds

IPV6 support to busybox.  This patch does the following:
    * Add IPv6 support to libbb
    * Enable IPv6 interface address display
    * Add IPv6 config option
    * Adds ping6, an adaptation of the ping applet for IPv6
    * Adds support routines for ping6:
	- xgethostbyname2
	- create_icmp6_socket
    * Adds ifconfig support for IPv6
    * Add support IPv6 to netstat
    * Add IPv6 support to route
Thanks Bart!

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 000000000..a09565605
--- /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