[6to4 v6 2/9] inet: MTU and tunnel setup functions added.

[Jukka Rissanen]

---
 include/inet.h |    3 ++
 src/inet.c     |   71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 72 insertions(+), 2 deletions(-)

diff --git a/include/inet.h b/include/inet.h
index 9ba7781..9a9411d 100644
--- a/include/inet.h
+++ b/include/inet.h
@@ -73,6 +73,9 @@ int connman_inet_clear_ipv6_gateway_address(int index, const 
char *gateway);
 int connman_inet_add_to_bridge(int index, const char *bridge);
 int connman_inet_remove_from_bridge(int index, const char *bridge);
 
+int connman_inet_set_mtu(int index, int mtu);
+int connman_inet_setup_tunnel(char *tunnel, int mtu);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/inet.c b/src/inet.c
index fa768fb..8609d9e 100644
--- a/src/inet.c
+++ b/src/inet.c
@@ -35,8 +35,8 @@
 #include <arpa/inet.h>
 #include <net/route.h>
 #include <net/ethernet.h>
-#include <linux/if_arp.h>
-#include <linux/wireless.h>
+#include <net/if.h>
+#include <net/if_arp.h>
 
 #include "connman.h"
 
@@ -1194,3 +1194,70 @@ int connman_inet_add_to_bridge(int index, const char 
*bridge)
 
        return 0;
 }
+
+int connman_inet_set_mtu(int index, int mtu)
+{
+       struct ifreq ifr;
+       int sk, err;
+
+       sk = socket(AF_INET, SOCK_DGRAM, 0);
+       if (sk < 0)
+               return sk;
+
+       memset(&ifr, 0, sizeof(ifr));
+       ifr.ifr_ifindex = index;
+
+       err = ioctl(sk, SIOCGIFNAME, &ifr);
+       if (err == 0) {
+               ifr.ifr_mtu = mtu;
+               err = ioctl(sk, SIOCSIFMTU, &ifr);
+       }
+
+       close(sk);
+       return err;
+}
+
+int connman_inet_setup_tunnel(char *tunnel, int mtu)
+{
+       struct ifreq ifr;
+       int sk, err, index;
+       __u32 mask;
+       __u32 flags;
+
+       if (tunnel == NULL)
+               return -EINVAL;
+
+       sk = socket(AF_INET, SOCK_DGRAM, 0);
+       if (sk < 0)
+               return sk;
+
+       index = if_nametoindex(tunnel);
+
+       err = connman_inet_set_mtu(index, mtu);
+       if (err < 0)
+               return err;
+       else if (err)
+               goto done;
+
+       memset(&ifr, 0, sizeof(ifr));
+       strncpy(ifr.ifr_name, tunnel, IFNAMSIZ);
+       err = ioctl(sk, SIOCGIFFLAGS, &ifr);
+       if (err)
+               goto done;
+
+       mask = IFF_UP;
+       flags = IFF_UP;
+
+       if ((ifr.ifr_flags ^ flags) & mask) {
+               ifr.ifr_flags &= ~mask;
+               ifr.ifr_flags |= mask & flags;
+               err = ioctl(sk, SIOCSIFFLAGS, &ifr);
+               if (err)
+                       connman_error("SIOCSIFFLAGS failed: %s",
+                                                       strerror(errno));
+       }
+
+done:
+       close(sk);
+       return err;
+}
-- 
1.7.0.4

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