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platform: support creation of TUN/TAP devices

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This commit is contained in:
Beniamino Galvani
2015-09-15 15:07:37 +02:00
parent 64c6b124d2
commit 5b22711908
3 changed files with 110 additions and 4 deletions
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63
src/platform/nm-linux-platform.c
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@@ -22,6 +22,7 @@
#include <errno.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <dlfcn.h>
#include <netinet/icmp6.h>
@@ -4235,6 +4236,66 @@ link_vlan_change (NMPlatform *platform,
return do_change_link (platform, ifindex, nlmsg) == NM_PLATFORM_ERROR_SUCCESS;
}
static int
tun_add (NMPlatform *platform, const char *name, gboolean tap,
gint64 owner, gint64 group, gboolean pi, gboolean vnet_hdr,
gboolean multi_queue, NMPlatformLink *out_link)
{
const NMPObject *obj;
struct ifreq ifr = { };
int fd;
_LOGD ("link: add %s '%s' owner %" G_GINT64_FORMAT " group %" G_GINT64_FORMAT,
tap ? "tap" : "tun", name, owner, group);
fd = open ("/dev/net/tun", O_RDWR);
if (fd < 0)
return FALSE;
strncpy (ifr.ifr_name, name, IFNAMSIZ);
ifr.ifr_flags = tap ? IFF_TAP : IFF_TUN;
if (!pi)
ifr.ifr_flags |= IFF_NO_PI;
if (vnet_hdr)
ifr.ifr_flags |= IFF_VNET_HDR;
if (multi_queue)
ifr.ifr_flags |= NM_IFF_MULTI_QUEUE;
if (ioctl (fd, TUNSETIFF, &ifr)) {
close (fd);
return FALSE;
}
if (owner >= 0 && owner < G_MAXINT32) {
if (ioctl (fd, TUNSETOWNER, (uid_t) owner)) {
close (fd);
return FALSE;
}
}
if (group >= 0 && group < G_MAXINT32) {
if (ioctl (fd, TUNSETGROUP, (gid_t) group)) {
close (fd);
return FALSE;
}
}
if (ioctl (fd, TUNSETPERSIST, 1)) {
close (fd);
return FALSE;
}
do_request_link (platform, 0, name, TRUE);
obj = nmp_cache_lookup_link_full (NM_LINUX_PLATFORM_GET_PRIVATE (platform)->cache,
0, name, FALSE,
tap ? NM_LINK_TYPE_TAP : NM_LINK_TYPE_TUN,
NULL, NULL);
if (out_link && obj)
*out_link = obj->link;
return !!obj;
}
static gboolean
link_enslave (NMPlatform *platform, int master, int slave)
{
@@ -5444,6 +5505,8 @@ nm_linux_platform_class_init (NMLinuxPlatformClass *klass)
platform_class->vlan_add = vlan_add;
platform_class->link_vlan_change = link_vlan_change;
platform_class->tun_add = tun_add;
platform_class->infiniband_partition_add = infiniband_partition_add;
platform_class->wifi_get_capabilities = wifi_get_capabilities;