* THE SOFTWARE.
*/
-#include "net/tap.h"
-#incude "qemu-common.h"
+#include "tap_int.h"
+#include "qemu-common.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
-#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
-#include <freebsd/stdlib.h>
-
-#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
- TFR(fd = open("/dev/tap", O_RDWR));
+ /* 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) {
- fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
+ error_report("warning: could not open %s (%s): no virtual network emulation",
+ dname, strerror(errno));
return -1;
}
- 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) {
+ 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, QemuOpts *opts)
+int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
{
return 0;
}
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;
+}