Add helpers for ifup and ifdown

diff --git a/plugins/inet.c b/plugins/inet.c
index ab0fcdc..e3fedfb 100644 (file)
--- a/plugins/inet.c
+++ b/plugins/inet.c
@@ -105,3 +105,85 @@ char *inet_index2ident(int index, const char *prefix)
 
        return str;
 }
+
+int inet_ifup(int index)
+{
+       struct ifreq ifr;
+       int sk, err;
+
+       sk = socket(PF_INET, SOCK_DGRAM, 0);
+       if (sk < 0)
+               return -errno;
+
+       memset(&ifr, 0, sizeof(ifr));
+       ifr.ifr_ifindex = index;
+
+       if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
+               err = -errno;
+               goto done;
+       }
+
+       if (ioctl(sk, SIOCGIFFLAGS, &ifr) < 0) {
+               err = -errno;
+               goto done;
+       }
+
+       if (ifr.ifr_flags & IFF_UP) {
+               err = -EALREADY;
+               goto done;
+       }
+
+       ifr.ifr_flags |= IFF_UP;
+
+       if (ioctl(sk, SIOCSIFFLAGS, &ifr) < 0) {
+               err = -errno;
+               goto done;
+       }
+
+       err = 0;
+
+done:
+       close(sk);
+
+       return err;
+}
+
+int inet_ifdown(int index)
+{
+       struct ifreq ifr;
+       int sk, err;
+
+       sk = socket(PF_INET, SOCK_DGRAM, 0);
+       if (sk < 0)
+               return -errno;
+
+       memset(&ifr, 0, sizeof(ifr));
+       ifr.ifr_ifindex = index;
+
+       if (ioctl(sk, SIOCGIFNAME, &ifr) < 0) {
+               err = -errno;
+               goto done;
+       }
+
+       if (ioctl(sk, SIOCGIFFLAGS, &ifr) < 0) {
+               err = -errno;
+               goto done;
+       }
+
+       if (!(ifr.ifr_flags & IFF_UP)) {
+               err = -EALREADY;
+               goto done;
+       }
+
+       ifr.ifr_flags &= ~IFF_UP;
+
+       if (ioctl(sk, SIOCSIFFLAGS, &ifr) < 0)
+               err = -errno;
+       else
+               err = 0;
+
+done:
+       close(sk);
+
+       return err;
+}

diff --git a/plugins/inet.h b/plugins/inet.h
index afa8025..3246cc1 100644 (file)
--- a/plugins/inet.h
+++ b/plugins/inet.h
@@ -21,3 +21,6 @@
 
 char *inet_index2name(int index);
 char *inet_index2ident(int index, const char *prefix);
+
+int inet_ifup(int index);
+int inet_ifdown(int index);