X-Git-Url: https://repo.jachan.dev/qemu.git/blobdiff_plain/f57fb88436464cf72a2a0c7372e2dc0af1870b5f..c8e829b7bf6e1c84af8b4b13ee7fce2959c63e0e:/qemu-bridge-helper.c

diff --git a/qemu-bridge-helper.c b/qemu-bridge-helper.c
index 652eec99fd..36eb3bcfd6 100644
--- a/qemu-bridge-helper.c
+++ b/qemu-bridge-helper.c
@@ -39,7 +39,7 @@
 #include <linux/if_bridge.h>
 #endif
 
-#include "qemu-queue.h"
+#include "qemu/queue.h"
 
 #include "net/tap-linux.h"
 
@@ -229,7 +229,7 @@ int main(int argc, char **argv)
     unsigned long ifargs[4];
 #endif
     int ifindex;
-    int fd, ctlfd, unixfd = -1;
+    int fd = -1, ctlfd = -1, unixfd = -1;
     int use_vnet = 0;
     int mtu;
     const char *bridge = NULL;
@@ -367,6 +367,24 @@ int main(int argc, char **argv)
         goto cleanup;
     }
 
+    /* Linux uses the lowest enslaved MAC address as the MAC address of
+     * the bridge.  Set MAC address to a high value so that it doesn't
+     * affect the MAC address of the bridge.
+     */
+    if (ioctl(ctlfd, SIOCGIFHWADDR, &ifr) < 0) {
+        fprintf(stderr, "failed to get MAC address of device `%s': %s\n",
+                iface, strerror(errno));
+        ret = EXIT_FAILURE;
+        goto cleanup;
+    }
+    ifr.ifr_hwaddr.sa_data[0] = 0xFE;
+    if (ioctl(ctlfd, SIOCSIFHWADDR, &ifr) < 0) {
+        fprintf(stderr, "failed to set MAC address of device `%s': %s\n",
+                iface, strerror(errno));
+        ret = EXIT_FAILURE;
+        goto cleanup;
+    }
+
     /* add the interface to the bridge */
     prep_ifreq(&ifr, bridge);
     ifindex = if_nametoindex(iface);
@@ -418,7 +436,12 @@ int main(int argc, char **argv)
     /* profit! */
 
 cleanup:
-
+    if (fd >= 0) {
+        close(fd);
+    }
+    if (ctlfd >= 0) {
+        close(ctlfd);
+    }
     while ((acl_rule = QSIMPLEQ_FIRST(&acl_list)) != NULL) {
         QSIMPLEQ_REMOVE_HEAD(&acl_list, entry);
         g_free(acl_rule);