diff options
Diffstat (limited to 'net/tap-bsd.c')
| -rw-r--r-- | net/tap-bsd.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/net/tap-bsd.c b/net/tap-bsd.c new file mode 100644 index 00000000..7028d9be --- /dev/null +++ b/net/tap-bsd.c @@ -0,0 +1,227 @@ +/* + * 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 "tap_int.h" +#include "qemu-common.h" +#include "sysemu/sysemu.h" +#include "qemu/error-report.h" + +#if defined(__NetBSD__) || defined(__FreeBSD__) +#include <sys/ioctl.h> +#include <net/if.h> +#include <net/if_tap.h> +#endif + +#ifndef __FreeBSD__ +int tap_open(char *ifname, int ifname_size, int *vnet_hdr, + int vnet_hdr_required, int mq_required, Error **errp) +{ + int fd; +#ifdef TAPGIFNAME + struct ifreq ifr; +#else + char *dev; + struct stat s; +#endif + + /* 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_setg_errno(errp, errno, "could not open %s", dname); + return -1; + } + +#ifdef TAPGIFNAME + if (ioctl(fd, TAPGIFNAME, (void *)&ifr) < 0) { + error_setg_errno(errp, errno, "could not get tap name"); + return -1; + } + pstrcpy(ifname, ifname_size, ifr.ifr_name); +#else + if (fstat(fd, &s) < 0) { + error_setg_errno(errp, errno, "could not stat %s", dname); + 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_setg(errp, "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; +} + +#else /* __FreeBSD__ */ + +#define PATH_NET_TAP "/dev/tap" + +int tap_open(char *ifname, int ifname_size, int *vnet_hdr, + int vnet_hdr_required, int mq_required, Error **errp) +{ + int fd, s, ret; + struct ifreq ifr; + + TFR(fd = open(PATH_NET_TAP, O_RDWR)); + if (fd < 0) { + error_setg_errno(errp, errno, "could not open %s", PATH_NET_TAP); + return -1; + } + + memset(&ifr, 0, sizeof(ifr)); + + ret = ioctl(fd, TAPGIFNAME, (void *)&ifr); + if (ret < 0) { + error_setg_errno(errp, errno, "could not get tap interface name"); + goto error; + } + + if (ifname[0] != '\0') { + /* User requested the interface to have a specific name */ + s = socket(AF_LOCAL, SOCK_DGRAM, 0); + if (s < 0) { + error_setg_errno(errp, errno, + "could not open socket to set interface name"); + goto error; + } + ifr.ifr_data = ifname; + ret = ioctl(s, SIOCSIFNAME, (void *)&ifr); + close(s); + if (ret < 0) { + error_setg(errp, "could not set tap interface name"); + goto error; + } + } else { + pstrcpy(ifname, ifname_size, ifr.ifr_name); + } + + if (*vnet_hdr) { + /* BSD doesn't have IFF_VNET_HDR */ + *vnet_hdr = 0; + + if (vnet_hdr_required && !*vnet_hdr) { + error_setg(errp, "vnet_hdr=1 requested, but no kernel " + "support for IFF_VNET_HDR available"); + goto error; + } + } + if (mq_required) { + error_setg(errp, "mq_required requested, but no kernel support" + " for IFF_MULTI_QUEUE available"); + goto error; + } + + fcntl(fd, F_SETFL, O_NONBLOCK); + return fd; + +error: + close(fd); + return -1; +} +#endif /* __FreeBSD__ */ + +void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp) +{ +} + +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) +{ +} + +int tap_fd_set_vnet_le(int fd, int is_le) +{ + return -EINVAL; +} + +int tap_fd_set_vnet_be(int fd, int is_be) +{ + return -EINVAL; +} + +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; +} |