fix obnoxiuos warnings

diff --git a/planetlab/pltap-ovs/tunalloc.c b/planetlab/pltap-ovs/tunalloc.c
index 6adcf24..1f083e5 100644 (file)
--- a/planetlab/pltap-ovs/tunalloc.c
+++ b/planetlab/pltap-ovs/tunalloc.c
@@ -17,8 +17,12 @@
 
 #define VSYS_TUNTAP "/vsys/fd_tuntap.control"
 
+
+int tun_alloc(int iftype, char *if_name);
+
 /* Reads vif FD from "fd", writes interface name to vif_name, and returns vif FD.
  * vif_name should be IFNAMSIZ chars long. */
+static
 int receive_vif_fd(int fd, char *vif_name)
 {
        struct msghdr msg;
@@ -26,6 +30,7 @@ int receive_vif_fd(int fd, char *vif_name)
        int rv;
        size_t ccmsg[CMSG_SPACE(sizeof(int)) / sizeof(size_t)];
        struct cmsghdr *cmsg;
+       unsigned char *data;
 
     /* Use IOV to read interface name */
        iov.iov_base = vif_name;
@@ -56,7 +61,8 @@ int receive_vif_fd(int fd, char *vif_name)
                        cmsg->cmsg_type);
                return -1;
        }
-       return *(int*)CMSG_DATA(cmsg);
+       data = CMSG_DATA(cmsg);
+       return *(int*)data;
 }