net: support for bridged networking on Mac OS X

[qemu.git] / net / tap-bsd.c

diff --git a/net/tap-bsd.c b/net/tap-bsd.c
index bde2083e577b681b4ddcaf087eddce4c5628017d..f61d5809634e240c996cc3b8d25cf30629103b9a 100644 (file)
--- a/net/tap-bsd.c
+++ b/net/tap-bsd.c
@@ -22,50 +22,95 @@
  * THE SOFTWARE.
  */
 
-#include "net/tap.h"
+#include "tap_int.h"
 #include "qemu-common.h"
-#include "sysemu.h"
+#include "sysemu/sysemu.h"
+#include "qemu/error-report.h"
 
 #ifdef __NetBSD__
+#include <sys/ioctl.h>
+#include <net/if.h>
 #include <net/if_tap.h>
 #endif
 
-#if defined(__FreeBSD__) || defined(__DragonFly__)
-#include <libutil.h>
-#else
-#include <util.h>
-#endif
-#if defined (__GLIBC__) && defined (__FreeBSD_kernel__)
-#include <freebsd/stdlib.h>
-#endif
-
-#if defined(__OpenBSD__)
-#include <util.h>
-#endif
-
-int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required)
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+             int vnet_hdr_required, int mq_required)
 {
     int fd;
+#ifdef TAPGIFNAME
+    struct ifreq ifr;
+#else
     char *dev;
     struct stat s;
+#endif
 
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
+    defined(__OpenBSD__) || defined(__APPLE__)
+    /* if no ifname is given, always start the search from tap0/tun0. */
+    int i;
+    char dname[100];
+
+    for (i = 0; i < 10; i++) {
+        if (*ifname) {
+            snprintf(dname, sizeof dname, "/dev/%s", ifname);
+        } else {
+#if defined(__OpenBSD__)
+            snprintf(dname, sizeof dname, "/dev/tun%d", i);
+#else
+            snprintf(dname, sizeof dname, "/dev/tap%d", i);
+#endif
+        }
+        TFR(fd = open(dname, O_RDWR));
+        if (fd >= 0) {
+            break;
+        }
+        else if (errno == ENXIO || errno == ENOENT) {
+            break;
+        }
+        if (*ifname) {
+            break;
+        }
+    }
+    if (fd < 0) {
+        error_report("warning: could not open %s (%s): no virtual network emulation",
+                   dname, strerror(errno));
+        return -1;
+    }
+#else
     TFR(fd = open("/dev/tap", O_RDWR));
     if (fd < 0) {
-        fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
+        fprintf(stderr,
+            "warning: could not open /dev/tap: no virtual network emulation: %s\n",
+            strerror(errno));
         return -1;
     }
+#endif
 
-    fstat(fd, &s);
+#ifdef TAPGIFNAME
+    if (ioctl(fd, TAPGIFNAME, (void *)&ifr) < 0) {
+        fprintf(stderr, "warning: could not get tap name: %s\n",
+            strerror(errno));
+        return -1;
+    }
+    pstrcpy(ifname, ifname_size, ifr.ifr_name);
+#else
+    if (fstat(fd, &s) < 0) {
+        fprintf(stderr,
+            "warning: could not stat /dev/tap: no virtual network emulation: %s\n",
+            strerror(errno));
+        return -1;
+    }
     dev = devname(s.st_rdev, S_IFCHR);
     pstrcpy(ifname, ifname_size, dev);
+#endif
 
     if (*vnet_hdr) {
         /* BSD doesn't have IFF_VNET_HDR */
         *vnet_hdr = 0;
 
         if (vnet_hdr_required && !*vnet_hdr) {
-            qemu_error("vnet_hdr=1 requested, but no kernel "
-                       "support for IFF_VNET_HDR available");
+            error_report("vnet_hdr=1 requested, but no kernel "
+                         "support for IFF_VNET_HDR available");
             close(fd);
             return -1;
         }
@@ -74,7 +119,7 @@ int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required
     return fd;
 }
 
-int tap_set_sndbuf(int fd, QemuOpts *opts)
+int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
 {
     return 0;
 }
@@ -89,7 +134,31 @@ int tap_probe_has_ufo(int fd)
     return 0;
 }
 
+int tap_probe_vnet_hdr_len(int fd, int len)
+{
+    return 0;
+}
+
+void tap_fd_set_vnet_hdr_len(int fd, int len)
+{
+}
+
 void tap_fd_set_offload(int fd, int csum, int tso4,
                         int tso6, int ecn, int ufo)
 {
 }
+
+int tap_fd_enable(int fd)
+{
+    return -1;
+}
+
+int tap_fd_disable(int fd)
+{
+    return -1;
+}
+
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+    return -1;
+}