-/* Copyright (C) 2007 Board of Trustees, Leland Stanford Jr. University.
- *
- * 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.
+ /* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+ * Junior University
+ *
+ * We are making the OpenFlow specification and associated documentation
+ * (Software) available for public use and benefit with the expectation
+ * that others will use, modify and enhance the Software and contribute
+ * those enhancements back to the community. However, since we would
+ * like to make the Software available for broadest use, with as few
+ * restrictions as possible permission is hereby granted, free of
+ * charge, to any person obtaining a copy of this Software to deal in
+ * the Software under the copyrights 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.
+ *
+ * The name and trademarks of copyright holder(s) may NOT be used in
+ * advertising or publicity pertaining to the Software or any
+ * derivatives without specific, written prior permission.
*/
#include <errno.h>
#include <getopt.h>
+#include <inttypes.h>
+#include <netinet/in.h>
#include <poll.h>
#include <stdlib.h>
#include <string.h>
+#include <time.h>
#include <unistd.h>
#include "buffer.h"
#include "command-line.h"
#include "compiler.h"
+#include "daemon.h"
#include "fault.h"
+#include "flow.h"
+#include "learning-switch.h"
+#include "list.h"
+#include "mac-learning.h"
+#include "netdev.h"
+#include "openflow.h"
+#include "packets.h"
+#include "poll-loop.h"
+#include "rconn.h"
#include "util.h"
+#include "vconn-ssl.h"
#include "vconn.h"
#include "vlog-socket.h"
-#include "openflow.h"
#include "vlog.h"
#define THIS_MODULE VLM_secchan
-static void parse_options(int argc, char *argv[]);
-static void usage(void) NO_RETURN;
+#include "ofp-print.h"
-static bool reliable = true;
+static const char *listen_vconn_name;
struct half {
- const char *name;
- struct vconn *vconn;
- struct pollfd *pollfd;
+ struct rconn *rconn;
struct buffer *rxbuf;
};
-static void reconnect(struct half *);
+/* Behavior when the connection to the controller fails. */
+enum fail_mode {
+ FAIL_OPEN, /* Act as learning switch. */
+ FAIL_CLOSED /* Drop all packets. */
+};
+
+struct relay {
+ struct list node;
+
+#define HALF_LOCAL 0
+#define HALF_REMOTE 1
+ struct half halves[2];
+
+ bool is_mgmt_conn;
+ struct lswitch *lswitch;
+};
+
+static struct list relays = LIST_INITIALIZER(&relays);
+
+/* Enable the local port? */
+static int local_port;
+
+/* MAC address of local port. */
+static uint8_t local_mac[ETH_ADDR_LEN];
+
+/* MAC learning table for local port. */
+static struct mac_learning *local_ml;
+
+/* -f, --fail: Behavior when the connection to the controller fails. */
+static enum fail_mode fail_mode = FAIL_OPEN;
+
+/* -d, --fail-open-delay: Number of seconds after which to fail open, when
+ * fail_mode is FAIL_OPEN. */
+static int fail_open_delay = 30;
+
+static void parse_options(int argc, char *argv[]);
+static void usage(void) NO_RETURN;
+
+static void new_management_connection(const char *nl_name, struct vconn *new_remote);
+static struct relay *relay_create(struct rconn *local, struct rconn *remote,
+ bool is_mgmt_conn);
+static void relay_run(struct relay *);
+static void relay_wait(struct relay *);
+static void relay_destroy(struct relay *);
+
+static bool local_hook(struct relay *r);
+static bool fail_open_hook(struct relay *r);
int
main(int argc, char *argv[])
{
- struct half halves[2];
- struct pollfd pollfds[2 + 1];
- struct vlog_server *vlog_server;
+ struct vconn *listen_vconn;
+ struct netdev *of_device;
+ const char *nl_name;
+ char of_name[16];
int retval;
- int i;
set_program_name(argv[0]);
register_fault_handlers();
parse_options(argc, argv);
if (argc - optind != 2) {
- fatal(0, "exactly two peer arguments required; use --help for usage");
+ fatal(0,
+ "need exactly two non-option arguments; use --help for usage");
+ }
+ nl_name = argv[optind];
+ if (strncmp(nl_name, "nl:", 3)
+ || strlen(nl_name) < 4
+ || nl_name[strspn(nl_name + 3, "0123456789") + 3]) {
+ fatal(0, "%s: argument is not of the form \"nl:DP_ID\"", nl_name);
+ }
+
+ if (listen_vconn_name) {
+ retval = vconn_open(listen_vconn_name, &listen_vconn);
+ if (retval && retval != EAGAIN) {
+ fatal(retval, "opening %s", listen_vconn_name);
+ }
+ if (!vconn_is_passive(listen_vconn)) {
+ fatal(0, "%s is not a passive vconn", listen_vconn_name);
+ }
+ } else {
+ listen_vconn = NULL;
}
- retval = vlog_server_listen(NULL, &vlog_server);
+ snprintf(of_name, sizeof of_name, "of%s", nl_name + 3);
+ retval = netdev_open(of_name, &of_device);
+ if (!retval) {
+ enum netdev_flags flags;
+ retval = netdev_get_flags(of_device, &flags);
+ if (!retval) {
+ if (flags & NETDEV_UP) {
+ struct in6_addr in6;
+
+ local_port = true;
+ memcpy(local_mac, netdev_get_etheraddr(of_device),
+ ETH_ADDR_LEN);
+ if (netdev_get_in6(of_device, &in6)) {
+ VLOG_WARN("Ignoring IPv6 address on %s device: "
+ "IPv6 not supported", of_name);
+ }
+ local_ml = mac_learning_create();
+ }
+ } else {
+ error(retval, "Could not get flags for %s device", of_name);
+ }
+ netdev_close(of_device);
+ } else {
+ error(retval, "Could not open %s device", of_name);
+ }
+
+ retval = vlog_server_listen(NULL, NULL);
if (retval) {
fatal(retval, "Could not listen for vlog connections");
}
- for (i = 0; i < 2; i++) {
- halves[i].name = argv[optind + i];
- halves[i].vconn = NULL;
- halves[i].pollfd = &pollfds[i];
- halves[i].rxbuf = NULL;
- reconnect(&halves[i]);
- }
+ daemonize();
+
+ relay_create(rconn_new(argv[optind], 1), rconn_new(argv[optind + 1], 1),
+ false);
for (;;) {
- /* Wait until there's something to do. */
- for (i = 0; i < 2; i++) {
- struct half *this = &halves[i];
- struct half *peer = &halves[!i];
- int want = 0;
- if (peer->rxbuf) {
- want |= WANT_SEND;
- }
- if (!this->rxbuf) {
- want |= WANT_RECV;
- }
- this->pollfd->fd = -1;
- this->pollfd->events = 0;
- vconn_prepoll(this->vconn, want, this->pollfd);
- }
- if (vlog_server) {
- pollfds[2].fd = vlog_server_get_fd(vlog_server);
- pollfds[2].events = POLLIN;
+ struct relay *r, *n;
+
+ /* Do work. */
+ LIST_FOR_EACH_SAFE (r, n, struct relay, node, &relays) {
+ relay_run(r);
}
- do {
- retval = poll(pollfds, 2 + (vlog_server != NULL), -1);
- } while (retval < 0 && errno == EINTR);
- if (retval <= 0) {
- fatal(retval < 0 ? errno : 0, "poll");
+ if (listen_vconn) {
+ for (;;) {
+ struct vconn *new_remote;
+ retval = vconn_accept(listen_vconn, &new_remote);
+ if (retval) {
+ if (retval != EAGAIN) {
+ VLOG_WARN("accept failed (%s)", strerror(retval));
+ }
+ break;
+ }
+ new_management_connection(nl_name, new_remote);
+ }
}
- /* Let each connection deal with any pending operations. */
- for (i = 0; i < 2; i++) {
- struct half *this = &halves[i];
- vconn_postpoll(this->vconn, &this->pollfd->revents);
- if (this->pollfd->revents & POLLERR) {
- this->pollfd->revents |= POLLIN | POLLOUT;
- }
+ /* Wait for something to happen. */
+ LIST_FOR_EACH (r, struct relay, node, &relays) {
+ relay_wait(r);
}
- if (vlog_server && pollfds[2].revents) {
- vlog_server_poll(vlog_server);
+ if (listen_vconn) {
+ vconn_accept_wait(listen_vconn);
}
+ poll_block();
+ }
- /* Do as much work as we can without waiting. */
+ return 0;
+}
+
+static void
+new_management_connection(const char *nl_name, struct vconn *new_remote)
+{
+ char *nl_name_without_subscription;
+ struct vconn *new_local;
+ struct rconn *r1, *r2;
+ int retval;
+
+ /* nl:123 or nl:123:1 opens a netlink connection to local datapath 123. We
+ * only accept the former syntax in main().
+ *
+ * nl:123:0 opens a netlink connection to local datapath 123 without
+ * obtaining a subscription for ofp_packet_in or ofp_flow_expired
+ * messages.*/
+ nl_name_without_subscription = xasprintf("%s:0", nl_name);
+ retval = vconn_open(nl_name_without_subscription, &new_local);
+ if (retval) {
+ VLOG_ERR("could not connect to %s (%s)",
+ nl_name_without_subscription, strerror(retval));
+ vconn_close(new_remote);
+ free(nl_name_without_subscription);
+ return;
+ }
+
+ /* Add it to the relay list. */
+ r1 = rconn_new_from_vconn(nl_name_without_subscription, 1, new_local);
+ r2 = rconn_new_from_vconn("passive", 1, new_remote);
+ relay_create(r1, r2, true);
+
+ free(nl_name_without_subscription);
+}
+
+static struct relay *
+relay_create(struct rconn *local, struct rconn *remote, bool is_mgmt_conn)
+{
+ struct relay *r;
+ int i;
+
+ r = xmalloc(sizeof *r);
+ r->halves[HALF_LOCAL].rconn = local;
+ r->halves[HALF_REMOTE].rconn = remote;
+ for (i = 0; i < 2; i++) {
+ r->halves[i].rxbuf = NULL;
+ }
+ r->is_mgmt_conn = is_mgmt_conn;
+ r->lswitch = NULL;
+ list_push_back(&relays, &r->node);
+ return r;
+}
+
+static void
+relay_run(struct relay *r)
+{
+ int iteration;
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ rconn_run(r->halves[i].rconn);
+ }
+
+ /* Limit the number of iterations to prevent other tasks from starving. */
+ for (iteration = 0; iteration < 50; iteration++) {
+ bool progress = false;
for (i = 0; i < 2; i++) {
- struct half *this = &halves[i];
- struct half *peer = &halves[!i];
-
- if (this->pollfd->revents & POLLIN && !this->rxbuf) {
- retval = vconn_recv(this->vconn, &this->rxbuf);
- if (retval && retval != EAGAIN) {
- VLOG_DBG("%s: recv: closing connection: %s",
- this->name, strerror(retval));
- reconnect(this);
- break;
+ struct half *this = &r->halves[i];
+ struct half *peer = &r->halves[!i];
+
+ if (!this->rxbuf) {
+ this->rxbuf = rconn_recv(this->rconn);
+ if (this->rxbuf && !r->is_mgmt_conn && i == HALF_LOCAL
+ && (local_hook(r) || fail_open_hook(r))) {
+ buffer_delete(this->rxbuf);
+ this->rxbuf = NULL;
}
}
- if (peer->pollfd->revents & POLLOUT && this->rxbuf) {
- retval = vconn_send(peer->vconn, this->rxbuf);
- if (!retval) {
+ if (this->rxbuf) {
+ int retval = rconn_send(peer->rconn, this->rxbuf);
+ if (retval != EAGAIN) {
+ if (!retval) {
+ progress = true;
+ } else {
+ buffer_delete(this->rxbuf);
+ }
this->rxbuf = NULL;
- } else if (retval != EAGAIN) {
- VLOG_DBG("%s: send: closing connection: %s",
- peer->name, strerror(retval));
- reconnect(peer);
- break;
}
- }
+ }
+ }
+ if (!progress) {
+ break;
}
}
- return 0;
+ for (i = 0; i < 2; i++) {
+ struct half *this = &r->halves[i];
+ if (!rconn_is_alive(this->rconn)) {
+ relay_destroy(r);
+ return;
+ }
+ }
}
static void
-reconnect(struct half *this)
+relay_wait(struct relay *r)
{
- int backoff;
-
- if (this->vconn != NULL) {
- if (!reliable) {
- fatal(0, "%s: connection dropped", this->name);
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ struct half *this = &r->halves[i];
+
+ rconn_run_wait(this->rconn);
+ if (!this->rxbuf) {
+ rconn_recv_wait(this->rconn);
}
+ }
+}
- VLOG_WARN("%s: connection dropped, reconnecting", this->name);
- vconn_close(this->vconn);
- this->vconn = NULL;
+static void
+relay_destroy(struct relay *r)
+{
+ int i;
+
+ list_remove(&r->node);
+ for (i = 0; i < 2; i++) {
+ struct half *this = &r->halves[i];
+ rconn_destroy(this->rconn);
buffer_delete(this->rxbuf);
- this->rxbuf = NULL;
}
- this->pollfd->revents = POLLIN | POLLOUT;
+ free(r);
+}
- for (backoff = 1; ; backoff = MIN(backoff * 2, 60)) {
- int retval = vconn_open(this->name, &this->vconn);
- if (!retval) {
- VLOG_WARN("%s: connected", this->name);
- if (vconn_is_passive(this->vconn)) {
- fatal(0, "%s: passive vconn not supported in control path",
- this->name);
- }
- return;
+static bool
+local_hook(struct relay *r)
+{
+ struct rconn *rc = r->halves[HALF_LOCAL].rconn;
+ struct buffer *msg = r->halves[HALF_LOCAL].rxbuf;
+ struct ofp_packet_in *opi;
+ struct ofp_header *oh;
+ size_t pkt_ofs, pkt_len;
+ struct buffer pkt, *b;
+ struct flow flow;
+ uint16_t in_port, out_port;
+
+ if (!local_port) {
+ return false;
+ }
+
+ oh = msg->data;
+ if (oh->type != OFPT_PACKET_IN) {
+ return false;
+ }
+ if (msg->size < offsetof (struct ofp_packet_in, data)) {
+ VLOG_WARN("packet too short (%zu bytes) for packet_in", msg->size);
+ return false;
+ }
+
+ /* Extract flow data from 'opi' into 'flow'. */
+ opi = msg->data;
+ in_port = ntohs(opi->in_port);
+ pkt_ofs = offsetof(struct ofp_packet_in, data);
+ pkt_len = ntohs(opi->header.length) - pkt_ofs;
+ pkt.data = opi->data;
+ pkt.size = pkt_len;
+ flow_extract(&pkt, in_port, &flow);
+
+ /* Deal with local stuff. */
+ if (!rconn_is_connected(r->halves[HALF_REMOTE].rconn)
+ && eth_addr_is_broadcast(flow.dl_dst)) {
+ out_port = OFPP_FLOOD;
+ } else if (in_port == OFPP_LOCAL) {
+ out_port = mac_learning_lookup(local_ml, flow.dl_dst);
+ } else if (eth_addr_equals(flow.dl_dst, local_mac)) {
+ out_port = OFPP_LOCAL;
+ if (mac_learning_learn(local_ml, flow.dl_src, in_port)) {
+ VLOG_DBG("learned that "ETH_ADDR_FMT" is on port %"PRIu16,
+ ETH_ADDR_ARGS(flow.dl_src), in_port);
+ }
+ } else {
+ return false;
+ }
+
+ /* Add new flow. */
+ if (out_port != OFPP_FLOOD) {
+ b = make_add_simple_flow(&flow, ntohl(opi->buffer_id), out_port);
+ if (rconn_force_send(rc, b)) {
+ buffer_delete(b);
}
+ }
- if (!reliable) {
- fatal(0, "%s: connection failed", this->name);
+ /* If the switch didn't buffer the packet, we need to send a copy. */
+ if (out_port == OFPP_FLOOD || ntohl(opi->buffer_id) == UINT32_MAX) {
+ b = make_unbuffered_packet_out(&pkt, in_port, out_port);
+ if (rconn_force_send(rc, b)) {
+ buffer_delete(b);
}
- VLOG_WARN("%s: connection failed (%s), reconnecting",
- this->name, strerror(errno));
- sleep(backoff);
}
+ return true;
+}
+
+static bool
+fail_open_hook(struct relay *r)
+{
+ struct buffer *msg = r->halves[HALF_LOCAL].rxbuf;
+ struct rconn *local = r->halves[HALF_LOCAL].rconn;
+ struct rconn *remote = r->halves[HALF_REMOTE].rconn;
+ int disconnected_duration;
+
+ if (fail_mode == FAIL_CLOSED) {
+ /* We fail closed, so there's never anything to do. */
+ return false;
+ }
+
+ disconnected_duration = rconn_disconnected_duration(remote);
+ if (disconnected_duration < fail_open_delay) {
+ /* It's not time to fail open yet. */
+ if (r->lswitch && rconn_is_connected(remote)) {
+ /* We're connected, so drop the learning switch. */
+ VLOG_WARN("No longer in fail-open mode");
+ lswitch_destroy(r->lswitch);
+ r->lswitch = NULL;
+ }
+ return false;
+ }
+
+ if (!r->lswitch) {
+ VLOG_WARN("Could not connect to controller for %d seconds, "
+ "failing open", disconnected_duration);
+ r->lswitch = lswitch_create(local, true, true);
+ }
+
+ /* Do switching. */
+ lswitch_process_packet(r->lswitch, local, msg);
+ rconn_run(local);
+ return true;
}
static void
parse_options(int argc, char *argv[])
{
static struct option long_options[] = {
- {"unreliable", no_argument, 0, 'u'},
+ {"fail", required_argument, 0, 'f'},
+ {"fail-open-delay", required_argument, 0, 'd'},
+ {"listen", required_argument, 0, 'l'},
+ {"detach", no_argument, 0, 'D'},
+ {"pidfile", optional_argument, 0, 'P'},
{"verbose", optional_argument, 0, 'v'},
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
+ VCONN_SSL_LONG_OPTIONS
{0, 0, 0, 0},
};
char *short_options = long_options_to_short_options(long_options);
for (;;) {
- int indexptr;
int c;
- c = getopt_long(argc, argv, short_options, long_options, &indexptr);
+ c = getopt_long(argc, argv, short_options, long_options, NULL);
if (c == -1) {
break;
}
switch (c) {
- case 'u':
- reliable = false;
+ case 'f':
+ if (!strcmp(optarg, "open")) {
+ fail_mode = FAIL_OPEN;
+ } else if (!strcmp(optarg, "closed")) {
+ fail_mode = FAIL_CLOSED;
+ } else {
+ fatal(0,
+ "-f or --fail argument must be \"open\" or \"closed\"");
+ }
+ break;
+
+ case 'd':
+ fail_open_delay = atoi(optarg);
+ if (fail_open_delay < 1) {
+ fatal(0,
+ "-d or --fail-open-delay argument must be at least 1");
+ }
+ break;
+
+ case 'D':
+ set_detach();
+ break;
+
+ case 'P':
+ set_pidfile(optarg ? optarg : "secchan.pid");
+ break;
+
+ case 'l':
+ if (listen_vconn_name) {
+ fatal(0, "-l or --listen may be only specified once");
+ }
+ listen_vconn_name = optarg;
break;
case 'h':
vlog_set_verbosity(optarg);
break;
+ VCONN_SSL_OPTION_HANDLERS
+
case '?':
exit(EXIT_FAILURE);
static void
usage(void)
{
- printf("%s: Secure Channel\n"
- "usage: %s [OPTIONS] nl:DP_ID tcp:HOST:[PORT]\n"
- "\nConnects to local datapath DP_ID via Netlink and \n"
- "controller on HOST via TCP to PORT (default: %d).\n"
- "\nNetworking options:\n"
- " -u, --unreliable do not reconnect after connections drop\n"
+ printf("%s: secure channel, a relay for OpenFlow messages.\n"
+ "usage: %s [OPTIONS] nl:DP_IDX CONTROLLER\n"
+ "where nl:DP_IDX is a datapath that has been added with dpctl\n"
+ "and CONTROLLER is an active OpenFlow connection method.\n",
+ program_name, program_name);
+ vconn_usage(true, true);
+ printf("\nNetworking options:\n"
+ " -f, --fail=open|closed when controller connection fails:\n"
+ " closed: drop all packets\n"
+ " open (default): act as learning switch\n"
+ " -d, --fail-open-delay=SECS number of seconds after which to\n"
+ " fail open if --fail=open (default: 30)\n"
+ " -l, --listen=METHOD allow management connections on METHOD\n"
+ " (a passive OpenFlow connection method)\n"
"\nOther options:\n"
+ " -D, --detach run in background as daemon\n"
+ " -P, --pidfile[=FILE] create pidfile (default: %s/secchan.pid)\n"
+ " -v, --verbose=MODULE:FACILITY:LEVEL configure logging levels\n"
" -v, --verbose set maximum verbosity level\n"
" -h, --help display this help message\n"
" -V, --version display version information\n",
- program_name, program_name, OFP_TCP_PORT);
+ RUNDIR);
exit(EXIT_SUCCESS);
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff