diff options
Diffstat (limited to 'net/tap.c')
| -rw-r--r-- | net/tap.c | 47 |
1 files changed, 0 insertions, 47 deletions
@@ -38,9 +38,7 @@ #include "qemu-char.h" #include "qemu-common.h" -#ifdef __linux__ #include "net/tap-linux.h" -#endif /* Maximum GSO packet size (64k) plus plenty of room for * the ethernet and virtio_net headers @@ -347,51 +345,6 @@ static TAPState *net_tap_fd_init(VLANState *vlan, return s; } -int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required) -{ - struct ifreq ifr; - int fd, ret; - - TFR(fd = open("/dev/net/tun", O_RDWR)); - if (fd < 0) { - fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n"); - return -1; - } - memset(&ifr, 0, sizeof(ifr)); - ifr.ifr_flags = IFF_TAP | IFF_NO_PI; - - if (*vnet_hdr) { - unsigned int features; - - if (ioctl(fd, TUNGETFEATURES, &features) == 0 && - features & IFF_VNET_HDR) { - *vnet_hdr = 1; - ifr.ifr_flags |= IFF_VNET_HDR; - } - - if (vnet_hdr_required && !*vnet_hdr) { - qemu_error("vnet_hdr=1 requested, but no kernel " - "support for IFF_VNET_HDR available"); - close(fd); - return -1; - } - } - - if (ifname[0] != '\0') - pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname); - else - pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d"); - ret = ioctl(fd, TUNSETIFF, (void *) &ifr); - if (ret != 0) { - fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n"); - close(fd); - return -1; - } - pstrcpy(ifname, ifname_size, ifr.ifr_name); - fcntl(fd, F_SETFL, O_NONBLOCK); - return fd; -} - static int launch_script(const char *setup_script, const char *ifname, int fd) { sigset_t oldmask, mask; |