From: Tom Gundersen <teg@jklm.no>
Date: Sun, 23 Mar 2014 23:07:46 +0000 (+0100)
Subject: networkd: netdev - verify that newlink messages has the expected kind
X-Git-Tag: v212~34
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=d39edfc72f9296078a18014627bf0a2543b60627;ds=sidebyside

networkd: netdev - verify that newlink messages has the expected kind

We match 'newlink' messages with expected netdev's based on their names. Now also
make sure that the receieved link has the expected kind.
---

diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 46815e0fd..684b1c7ad 100644
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -324,7 +324,7 @@ static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, vo
 
                 r = netdev_get(m, name, &netdev);
                 if (r >= 0) {
-                        r = netdev_set_ifindex(netdev, ifindex);
+                        r = netdev_set_ifindex(netdev, message);
                         if (r < 0)
                                 log_debug("could not set ifindex of netdev '%s' to %d: %s",
                                           name, ifindex, strerror(-r));
diff --git a/src/network/networkd-netdev.c b/src/network/networkd-netdev.c
index 3a670b3f0..356341a87 100644
--- a/src/network/networkd-netdev.c
+++ b/src/network/networkd-netdev.c
@@ -157,7 +157,7 @@ static int netdev_enter_ready(NetDev *netdev) {
 static int netdev_getlink_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
                                 void *userdata) {
         NetDev *netdev = userdata;
-        int r, ifindex;
+        int r;
 
         assert(netdev);
 
@@ -174,19 +174,7 @@ static int netdev_getlink_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
                 return 1;
         }
 
-        r = sd_rtnl_message_link_get_ifindex(m, &ifindex);
-        if (r < 0) {
-                log_struct_netdev(LOG_ERR, netdev,
-                                "MESSAGE=%s: could not get ifindex: %s",
-                                netdev->name, strerror(-r),
-                                "ERRNO=%d", -r,
-                                NULL);
-                return 1;
-        }
-
-        r = netdev_set_ifindex(netdev, ifindex);
-        if (r < 0)
-                log_warning_netdev(netdev, "could not set ifindex to %d", ifindex);
+        netdev_set_ifindex(netdev, m);
 
         return 1;
 }
@@ -392,10 +380,46 @@ int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callbac
         return 0;
 }
 
-int netdev_set_ifindex(NetDev *netdev, int ifindex) {
+int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *message) {
+        const char *kind;
+        char *received_kind;
+        int r, ifindex;
+
         assert(netdev);
         assert(ifindex > 0);
 
+        kind = netdev_kind_to_string(netdev->kind);
+        if (!kind)
+                log_error_netdev(netdev, "Could not get kind");
+
+        r = sd_rtnl_message_enter_container(message, IFLA_LINKINFO);
+        if (r < 0) {
+                log_error_netdev(netdev, "Could not get LINKINFO");
+                return r;
+        }
+
+        r = sd_rtnl_message_read_string(message, IFLA_INFO_KIND, &received_kind);
+        if (r < 0) {
+                log_error_netdev(netdev, "Could not get KIND");
+                return r;
+        }
+
+        if (!streq(kind, received_kind)) {
+                log_error_netdev(netdev, "Received newlink with wrong KIND");
+                netdev_enter_failed(netdev);
+                return r;
+        }
+
+        r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+        if (r < 0) {
+                log_struct_netdev(LOG_ERR, netdev,
+                                "MESSAGE=%s: could not get ifindex: %s",
+                                netdev->name, strerror(-r),
+                                "ERRNO=%d", -r,
+                                NULL);
+                return r;
+        }
+
         if (netdev->ifindex > 0) {
                 if (netdev->ifindex == ifindex)
                         return 0;
diff --git a/src/network/networkd.h b/src/network/networkd.h
index 239ef1cd3..8144031a9 100644
--- a/src/network/networkd.h
+++ b/src/network/networkd.h
@@ -264,7 +264,7 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(NetDev*, netdev_free);
 #define _cleanup_netdev_free_ _cleanup_(netdev_freep)
 
 int netdev_get(Manager *manager, const char *name, NetDev **ret);
-int netdev_set_ifindex(NetDev *netdev, int ifindex);
+int netdev_set_ifindex(NetDev *netdev, sd_rtnl_message *newlink);
 int netdev_enslave(NetDev *netdev, Link *link, sd_rtnl_message_handler_t cb);
 
 const char *netdev_kind_to_string(NetDevKind d) _const_;