X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fnetdev-tunnel.c;fp=lib%2Fnetdev-tunnel.c;h=6fe6d685e1ad0ce19c497f3ea89ca3ed3200034b;hb=1e3f34c7693bcabae8e443ac1b246680ef9b60e2;hp=0000000000000000000000000000000000000000;hpb=079b5942276a04b2b18f1ec5bd2e07170e3ab9bd;p=sliver-openvswitch.git

diff --git a/lib/netdev-tunnel.c b/lib/netdev-tunnel.c
new file mode 100644
index 000000000..6fe6d685e
--- /dev/null
+++ b/lib/netdev-tunnel.c
@@ -0,0 +1,510 @@
+/*
+ * Copyright (c) 2010, 2011, 2012 Nicira Networks.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+
+#include <unistd.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <errno.h>
+
+#include "flow.h"
+#include "list.h"
+#include "netdev-provider.h"
+#include "odp-util.h"
+#include "ofp-print.h"
+#include "ofpbuf.h"
+#include "packets.h"
+#include "poll-loop.h"
+#include "shash.h"
+#include "sset.h"
+#include "unixctl.h"
+#include "socket-util.h"
+#include "vlog.h"
+
+VLOG_DEFINE_THIS_MODULE(netdev_tunnel);
+
+struct netdev_dev_tunnel {
+    struct netdev_dev netdev_dev;
+    uint8_t hwaddr[ETH_ADDR_LEN];
+    struct netdev_stats stats;
+    enum netdev_flags flags;
+    int sockfd;
+    struct sockaddr_in local_addr;
+    struct sockaddr_in remote_addr;
+    bool valid_remote_ip;
+    bool valid_remote_port;
+    bool connected;
+    unsigned int change_seq;
+};
+
+struct netdev_tunnel {
+    struct netdev netdev;
+} ;
+
+static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
+
+static struct shash tunnel_netdev_devs = SHASH_INITIALIZER(&tunnel_netdev_devs);
+
+static int netdev_tunnel_create(const struct netdev_class *, const char *,
+                               struct netdev_dev **);
+static void netdev_tunnel_update_seq(struct netdev_dev_tunnel *);
+
+static bool
+is_tunnel_class(const struct netdev_class *class)
+{
+    return class->create == netdev_tunnel_create;
+}
+
+static struct netdev_dev_tunnel *
+netdev_dev_tunnel_cast(const struct netdev_dev *netdev_dev)
+{
+    assert(is_tunnel_class(netdev_dev_get_class(netdev_dev)));
+    return CONTAINER_OF(netdev_dev, struct netdev_dev_tunnel, netdev_dev);
+}
+
+static struct netdev_tunnel *
+netdev_tunnel_cast(const struct netdev *netdev)
+{
+    struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
+    assert(is_tunnel_class(netdev_dev_get_class(netdev_dev)));
+    return CONTAINER_OF(netdev, struct netdev_tunnel, netdev);
+}
+
+static int
+netdev_tunnel_create(const struct netdev_class *class, const char *name,
+                    struct netdev_dev **netdev_devp)
+{
+    static unsigned int n = 0xaa550000;
+    struct netdev_dev_tunnel *netdev_dev;
+    int error;
+
+    netdev_dev = xzalloc(sizeof *netdev_dev);
+    netdev_dev_init(&netdev_dev->netdev_dev, name, class);
+    netdev_dev->hwaddr[0] = 0x55;
+    netdev_dev->hwaddr[1] = 0xaa;
+    netdev_dev->hwaddr[2] = n >> 24;
+    netdev_dev->hwaddr[3] = n >> 16;
+    netdev_dev->hwaddr[4] = n >> 8;
+    netdev_dev->hwaddr[5] = n;
+    netdev_dev->flags = 0;
+    netdev_dev->change_seq = 1;
+    memset(&netdev_dev->remote_addr, 0, sizeof(netdev_dev->remote_addr));
+    netdev_dev->valid_remote_ip = false;
+    netdev_dev->valid_remote_port = false;
+    netdev_dev->connected = false;
+
+
+    netdev_dev->sockfd = inet_open_passive(SOCK_DGRAM, "", 0, &netdev_dev->local_addr, 0);
+    if (netdev_dev->sockfd < 0) {
+    	error = netdev_dev->sockfd;
+        goto error;
+    }
+
+
+    shash_add(&tunnel_netdev_devs, name, netdev_dev);
+
+    n++;
+
+    *netdev_devp = &netdev_dev->netdev_dev;
+
+    VLOG_DBG("tunnel_create: name=%s, fd=%d, port=%d", name, netdev_dev->sockfd, netdev_dev->local_addr.sin_port);
+
+    return 0;
+
+error:
+    free(netdev_dev);
+    return error;
+}
+
+static void
+netdev_tunnel_destroy(struct netdev_dev *netdev_dev_)
+{
+    struct netdev_dev_tunnel *netdev_dev = netdev_dev_tunnel_cast(netdev_dev_);
+
+    if (netdev_dev->sockfd != -1)
+    	close(netdev_dev->sockfd);
+
+    shash_find_and_delete(&tunnel_netdev_devs,
+                          netdev_dev_get_name(netdev_dev_));
+    free(netdev_dev);
+}
+
+static int
+netdev_tunnel_open(struct netdev_dev *netdev_dev_, struct netdev **netdevp)
+{
+    struct netdev_tunnel *netdev;
+
+    netdev = xmalloc(sizeof *netdev);
+    netdev_init(&netdev->netdev, netdev_dev_);
+
+    *netdevp = &netdev->netdev;
+    return 0;
+}
+
+static void
+netdev_tunnel_close(struct netdev *netdev_)
+{
+    struct netdev_tunnel *netdev = netdev_tunnel_cast(netdev_);
+    free(netdev);
+}
+
+static int
+netdev_tunnel_get_config(struct netdev_dev *dev_, struct shash *args)
+{
+    struct netdev_dev_tunnel *netdev_dev = netdev_dev_tunnel_cast(dev_);
+
+    if (netdev_dev->valid_remote_ip)
+    	shash_add(args, "remote_ip",
+	    xasprintf(IP_FMT, IP_ARGS(&netdev_dev->remote_addr.sin_addr)));
+    if (netdev_dev->valid_remote_port)
+        shash_add(args, "remote_port",
+	    xasprintf("%"PRIu16, ntohs(netdev_dev->remote_addr.sin_port)));
+    return 0;
+}
+
+static int
+netdev_tunnel_connect(struct netdev_dev_tunnel *dev)
+{
+    if (dev->sockfd < 0)
+        return EBADF;
+    if (!dev->valid_remote_ip || !dev->valid_remote_port)
+        return 0;
+    dev->remote_addr.sin_family = AF_INET;
+    if (connect(dev->sockfd, (struct sockaddr*) &dev->remote_addr, sizeof(dev->remote_addr)) < 0) {
+        return errno;
+    }
+    dev->connected = true;
+    netdev_tunnel_update_seq(dev);
+    VLOG_DBG("%s: connected to (%s, %d)", netdev_dev_get_name(&dev->netdev_dev),
+        inet_ntoa(dev->remote_addr.sin_addr), ntohs(dev->remote_addr.sin_port));
+    return 0;
+}
+
+static int
+netdev_tunnel_set_config(struct netdev_dev *dev_, const struct shash *args)
+{
+    struct netdev_dev_tunnel *netdev_dev = netdev_dev_tunnel_cast(dev_);
+    struct shash_node *node;
+
+    VLOG_DBG("tunnel_set_config(%s)", netdev_dev_get_name(dev_));
+    SHASH_FOR_EACH(node, args) {
+        VLOG_DBG("arg: %s->%s", node->name, (char*)node->data);
+    	if (!strcmp(node->name, "remote_ip")) {
+	    struct in_addr addr;
+	    if (lookup_ip(node->data, &addr)) {
+		VLOG_WARN("%s: bad 'remote_ip'", node->name);
+	    } else {
+		netdev_dev->remote_addr.sin_addr = addr;
+		netdev_dev->valid_remote_ip = true;
+	    }
+	} else if (!strcmp(node->name, "remote_port")) {
+	    netdev_dev->remote_addr.sin_port = htons(atoi(node->data));
+	    netdev_dev->valid_remote_port = true;
+	} else {
+	    VLOG_WARN("%s: unknown argument '%s'", 
+	    	netdev_dev_get_name(dev_), node->name);
+	}
+    }
+    return netdev_tunnel_connect(netdev_dev);        
+}
+
+static int
+netdev_tunnel_listen(struct netdev *netdev_ OVS_UNUSED)
+{
+    return 0;
+}
+
+static int
+netdev_tunnel_recv(struct netdev *netdev_, void *buffer, size_t size)
+{
+    struct netdev_dev_tunnel *dev = 
+    	netdev_dev_tunnel_cast(netdev_get_dev(netdev_));
+    if (!dev->connected)
+        return -EAGAIN;
+    for (;;) {
+        ssize_t retval;
+        retval = recv(dev->sockfd, buffer, size, MSG_TRUNC);
+	VLOG_DBG("%s: recv(%"PRIxPTR", %"PRIu64", MSG_TRUNC) = %"PRId64,
+		 netdev_get_name(netdev_), (uintptr_t)buffer, size, retval);
+        if (retval >= 0) {
+	    dev->stats.rx_packets++;
+	    dev->stats.rx_bytes += retval;
+            if (retval <= size) {
+	    	return retval;
+	    } else {
+	    	dev->stats.rx_errors++;
+		dev->stats.rx_length_errors++;
+	    	return -EMSGSIZE;
+	    }
+        } else if (errno != EINTR) {
+            if (errno != EAGAIN) {
+                VLOG_WARN_RL(&rl, "error receiveing Ethernet packet on %s: %s",
+                    netdev_get_name(netdev_), strerror(errno));
+	        dev->stats.rx_errors++;
+            }
+            return -errno;
+        }
+    }
+}
+
+static void
+netdev_tunnel_recv_wait(struct netdev *netdev_)
+{
+    struct netdev_dev_tunnel *dev = 
+    	netdev_dev_tunnel_cast(netdev_get_dev(netdev_));
+    if (dev->sockfd >= 0) {
+        poll_fd_wait(dev->sockfd, POLLIN);
+    }
+}
+
+static int
+netdev_tunnel_send(struct netdev *netdev_, const void *buffer, size_t size)
+{
+    struct netdev_dev_tunnel *dev = 
+    	netdev_dev_tunnel_cast(netdev_get_dev(netdev_));
+    if (!dev->connected)
+        return EAGAIN;
+    for (;;) {
+        ssize_t retval;
+        retval = send(dev->sockfd, buffer, size, 0);
+    	VLOG_DBG("%s: send(%"PRIxPTR", %"PRIu64") = %"PRId64,
+	         netdev_get_name(netdev_), (uintptr_t)buffer, size, retval);
+        if (retval >= 0) {
+	    dev->stats.tx_packets++;
+	    dev->stats.tx_bytes++;
+	    if (retval != size) {
+	        VLOG_WARN_RL(&rl, "sent partial Ethernet packet (%"PRId64" bytes of "
+		             "%"PRIu64") on %s", retval, size, netdev_get_name(netdev_));
+		dev->stats.tx_errors++;
+	    }
+            return 0;
+        } else if (errno != EINTR) {
+            if (errno != EAGAIN) {
+                VLOG_WARN_RL(&rl, "error sending Ethernet packet on %s: %s",
+                    netdev_get_name(netdev_), strerror(errno));
+		dev->stats.tx_errors++;
+            }
+            return errno;
+        }
+    }
+}
+
+static void
+netdev_tunnel_send_wait(struct netdev *netdev_)
+{
+    struct netdev_dev_tunnel *dev = 
+    	netdev_dev_tunnel_cast(netdev_get_dev(netdev_));
+    if (dev->sockfd >= 0) {
+        poll_fd_wait(dev->sockfd, POLLOUT);
+    }
+}
+
+static int
+netdev_tunnel_drain(struct netdev *netdev_)
+{
+    struct netdev_dev_tunnel *dev = 
+    	netdev_dev_tunnel_cast(netdev_get_dev(netdev_));
+    char buffer[128];
+    int error;
+
+    if (!dev->connected)
+    	return 0;
+    for (;;) {
+    	error = recv(dev->sockfd, buffer, 128, MSG_TRUNC);
+	if (error) {
+            if (error == -EAGAIN)
+	        break;
+            else if (error != -EMSGSIZE)
+	        return error;
+	}
+    }
+    return 0;
+}
+
+static int
+netdev_tunnel_set_etheraddr(struct netdev *netdev,
+                           const uint8_t mac[ETH_ADDR_LEN])
+{
+    struct netdev_dev_tunnel *dev =
+        netdev_dev_tunnel_cast(netdev_get_dev(netdev));
+
+    if (!eth_addr_equals(dev->hwaddr, mac)) {
+        memcpy(dev->hwaddr, mac, ETH_ADDR_LEN);
+        netdev_tunnel_update_seq(dev);
+    }
+
+    return 0;
+}
+
+static int
+netdev_tunnel_get_etheraddr(const struct netdev *netdev,
+                           uint8_t mac[ETH_ADDR_LEN])
+{
+    const struct netdev_dev_tunnel *dev =
+        netdev_dev_tunnel_cast(netdev_get_dev(netdev));
+
+    memcpy(mac, dev->hwaddr, ETH_ADDR_LEN);
+    return 0;
+}
+
+
+static int
+netdev_tunnel_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
+{
+    const struct netdev_dev_tunnel *dev =
+        netdev_dev_tunnel_cast(netdev_get_dev(netdev));
+
+    *stats = dev->stats;
+    return 0;
+}
+
+static int
+netdev_tunnel_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
+{
+    struct netdev_dev_tunnel *dev =
+        netdev_dev_tunnel_cast(netdev_get_dev(netdev));
+
+    dev->stats = *stats;
+    return 0;
+}
+
+static int
+netdev_tunnel_update_flags(struct netdev *netdev,
+                          enum netdev_flags off, enum netdev_flags on,
+                          enum netdev_flags *old_flagsp)
+{
+    struct netdev_dev_tunnel *dev =
+        netdev_dev_tunnel_cast(netdev_get_dev(netdev));
+
+    if ((off | on) & ~(NETDEV_UP | NETDEV_PROMISC)) {
+        return EINVAL;
+    }
+
+    // XXX should we actually do something with this flags?
+    *old_flagsp = dev->flags;
+    dev->flags |= on;
+    dev->flags &= ~off;
+    if (*old_flagsp != dev->flags) {
+        netdev_tunnel_update_seq(dev);
+    }
+    return 0;
+}
+
+static unsigned int
+netdev_tunnel_change_seq(const struct netdev *netdev)
+{
+    return netdev_dev_tunnel_cast(netdev_get_dev(netdev))->change_seq;
+}
+
+/* Helper functions. */
+
+static void
+netdev_tunnel_update_seq(struct netdev_dev_tunnel *dev)
+{
+    dev->change_seq++;
+    if (!dev->change_seq) {
+        dev->change_seq++;
+    }
+}
+
+static void
+netdev_tunnel_get_port(struct unixctl_conn *conn,
+                     int argc OVS_UNUSED, const char *argv[], void *aux OVS_UNUSED)
+{
+    struct netdev_dev_tunnel *tunnel_dev;
+    char buf[6];
+
+    tunnel_dev = shash_find_data(&tunnel_netdev_devs, argv[1]);
+    if (!tunnel_dev) {
+        unixctl_command_reply_error(conn, "no such tunnel netdev");
+        return;
+    }
+
+    sprintf(buf, "%d", ntohs(tunnel_dev->local_addr.sin_port));
+    unixctl_command_reply(conn, buf);
+}
+
+
+static int
+netdev_tunnel_init(void)
+{
+    unixctl_command_register("netdev-tunnel/get-port", "NAME",
+                             1, 1, netdev_tunnel_get_port, NULL);
+    return 0;
+}
+
+const struct netdev_class netdev_tunnel_class = {
+    "tunnel",
+    netdev_tunnel_init,         /* init */
+    NULL,                       /* run */
+    NULL,                       /* wait */
+
+    netdev_tunnel_create,
+    netdev_tunnel_destroy,
+    netdev_tunnel_get_config,
+    netdev_tunnel_set_config, 
+
+    netdev_tunnel_open,
+    netdev_tunnel_close,
+
+    netdev_tunnel_listen,
+    netdev_tunnel_recv,
+    netdev_tunnel_recv_wait,
+    netdev_tunnel_drain,
+
+    netdev_tunnel_send, 
+    netdev_tunnel_send_wait,  
+
+    netdev_tunnel_set_etheraddr,
+    netdev_tunnel_get_etheraddr,
+    NULL,			/* get_mtu */
+    NULL,			/* set_mtu */
+    NULL,                       /* get_ifindex */
+    NULL,			/* get_carrier */
+    NULL,                       /* get_carrier_resets */
+    NULL,                       /* get_miimon */
+    netdev_tunnel_get_stats,
+    netdev_tunnel_set_stats,
+
+    NULL,                       /* get_features */
+    NULL,                       /* set_advertisements */
+
+    NULL,                       /* set_policing */
+    NULL,                       /* get_qos_types */
+    NULL,                       /* get_qos_capabilities */
+    NULL,                       /* get_qos */
+    NULL,                       /* set_qos */
+    NULL,                       /* get_queue */
+    NULL,                       /* set_queue */
+    NULL,                       /* delete_queue */
+    NULL,                       /* get_queue_stats */
+    NULL,                       /* dump_queues */
+    NULL,                       /* dump_queue_stats */
+
+    NULL,                       /* get_in4 */
+    NULL,                       /* set_in4 */
+    NULL,                       /* get_in6 */
+    NULL,                       /* add_router */
+    NULL,                       /* get_next_hop */
+    NULL,                       /* get_drv_info */
+    NULL,                       /* arp_lookup */
+
+    netdev_tunnel_update_flags,
+
+    netdev_tunnel_change_seq
+};