Imported Upstream version 1.2.0upstream/1.2.0

1 files changed, 147 insertions, 0 deletions

diff --git a/net/tap-bsd.c b/net/tap-bsd.c
new file mode 100644
index 000000000..a3b717dd1
--- /dev/null
+++ b/net/tap-bsd.c
@@ -0,0 +1,147 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "net/tap.h"
+#include "qemu-common.h"
+#include "sysemu.h"
+#include "qemu-error.h"
+
+#ifdef __NetBSD__
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <net/if_tap.h>
+#endif
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required)
+{
+    int fd;
+#ifdef TAPGIFNAME
+    struct ifreq ifr;
+#else
+    char *dev;
+    struct stat s;
+#endif
+
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
+    /* 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: %s\n",
+            strerror(errno));
+        return -1;
+    }
+#endif
+
+#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) {
+            error_report("vnet_hdr=1 requested, but no kernel "
+                         "support for IFF_VNET_HDR available");
+            close(fd);
+            return -1;
+        }
+    }
+    fcntl(fd, F_SETFL, O_NONBLOCK);
+    return fd;
+}
+
+int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
+{
+    return 0;
+}
+
+int tap_probe_vnet_hdr(int fd)
+{
+    return 0;
+}
+
+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)
+{
+}