* gateway.
*/
-#define IB_BASE_PRIORITY 18181800
-
+/* Priorities used in classifier for in-band rules. These values are higher
+ * than any that may be set with OpenFlow, and "18" kind of looks like "IB".
+ * The ordering of priorities is not important because all of the rules set up
+ * by in-band control have the same action. The only reason to use more than
+ * one priority is to make the kind of flow easier to see during debugging. */
enum {
- IBR_FROM_LOCAL_DHCP, /* (a) From local port, DHCP. */
+ IBR_FROM_LOCAL_DHCP = 180000, /* (a) From local port, DHCP. */
IBR_TO_LOCAL_ARP, /* (b) To local port, ARP. */
IBR_FROM_LOCAL_ARP, /* (c) From local port, ARP. */
IBR_TO_REMOTE_ARP, /* (d) To remote MAC, ARP. */
IBR_TO_CTL_ARP, /* (f) To controller IP, ARP. */
IBR_FROM_CTL_ARP, /* (g) From controller IP, ARP. */
IBR_TO_CTL_OFP, /* (h) To controller, OpenFlow port. */
- IBR_FROM_CTL_OFP, /* (i) From controller, OpenFlow port. */
-#if OFP_TCP_PORT != OFP_SSL_PORT
-#error Need to support separate TCP and SSL flows.
-#endif
- N_IB_RULES
+ IBR_FROM_CTL_OFP /* (i) From controller, OpenFlow port. */
};
-struct ib_rule {
- bool installed;
+struct in_band_rule {
flow_t flow;
uint32_t wildcards;
unsigned int priority;
};
+/* Track one remote IP and next hop information. */
+struct in_band_remote {
+ struct rconn *rconn; /* Connection to remote. */
+ uint32_t remote_ip; /* Remote IP, 0 if unknown. */
+ uint8_t remote_mac[ETH_ADDR_LEN]; /* Next-hop MAC, all-zeros if unknown. */
+ uint8_t last_remote_mac[ETH_ADDR_LEN]; /* Previous nonzero next-hop MAC. */
+ struct netdev *remote_netdev; /* Device to send to next-hop MAC. */
+};
+
struct in_band {
struct ofproto *ofproto;
- struct rconn *controller;
struct status_category *ss_cat;
- /* Keep track of local port's information. */
- uint8_t local_mac[ETH_ADDR_LEN]; /* Current MAC. */
- struct netdev *local_netdev; /* Local port's network device. */
- time_t next_local_refresh;
-
- /* Keep track of controller and next hop's information. */
- uint32_t controller_ip; /* Controller IP, 0 if unknown. */
- uint8_t remote_mac[ETH_ADDR_LEN]; /* Remote MAC. */
- struct netdev *remote_netdev;
- uint8_t last_remote_mac[ETH_ADDR_LEN]; /* Previous remote MAC. */
- time_t next_remote_refresh;
-
- /* Rules that we set up. */
- struct ib_rule rules[N_IB_RULES];
+ /* Remote information. */
+ time_t next_remote_refresh; /* Refresh timer. */
+ struct in_band_remote *remotes;
+ size_t n_remotes;
+
+ /* Local information. */
+ time_t next_local_refresh; /* Refresh timer. */
+ uint8_t local_mac[ETH_ADDR_LEN]; /* Current MAC. */
+ struct netdev *local_netdev; /* Local port's network device. */
+
+ /* Local and remote addresses that are installed as flows. */
+ uint8_t installed_local_mac[ETH_ADDR_LEN];
+ uint32_t *remote_ips;
+ uint32_t n_remote_ips;
+ uint8_t *remote_macs;
+ size_t n_remote_macs;
};
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(60, 60);
-static const uint8_t *
-get_remote_mac(struct in_band *ib)
+static int
+refresh_remote(struct in_band *ib, struct in_band_remote *r)
{
- int retval;
- bool have_mac;
- struct in_addr c_in4; /* Controller's IP address. */
- struct in_addr r_in4; /* Next hop IP address. */
+ struct in_addr remote_inaddr;
+ struct in_addr next_hop_inaddr;
char *next_hop_dev;
- time_t now = time_now();
+ int retval;
- if (now >= ib->next_remote_refresh) {
- /* Find the next-hop IP address. */
- c_in4.s_addr = ib->controller_ip;
- memset(ib->remote_mac, 0, sizeof ib->remote_mac);
- retval = netdev_get_next_hop(ib->local_netdev,
- &c_in4, &r_in4, &next_hop_dev);
- if (retval) {
- VLOG_WARN("cannot find route for controller ("IP_FMT"): %s",
- IP_ARGS(&ib->controller_ip), strerror(retval));
- ib->next_remote_refresh = now + 1;
- return NULL;
- }
- if (!r_in4.s_addr) {
- r_in4.s_addr = c_in4.s_addr;
- }
+ /* Get remote IP address. */
+ r->remote_ip = rconn_get_remote_ip(r->rconn);
+
+ /* Find the next-hop IP address. */
+ remote_inaddr.s_addr = r->remote_ip;
+ memset(r->remote_mac, 0, sizeof r->remote_mac);
+ retval = netdev_get_next_hop(ib->local_netdev, &remote_inaddr,
+ &next_hop_inaddr, &next_hop_dev);
+ if (retval) {
+ VLOG_WARN("cannot find route for controller ("IP_FMT"): %s",
+ IP_ARGS(&r->remote_ip), strerror(retval));
+ return 1;
+ }
+ if (!next_hop_inaddr.s_addr) {
+ next_hop_inaddr.s_addr = remote_inaddr.s_addr;
+ }
- /* Get the next-hop IP and network device. */
- if (!ib->remote_netdev
- || strcmp(netdev_get_name(ib->remote_netdev), next_hop_dev))
- {
- netdev_close(ib->remote_netdev);
-
- retval = netdev_open_default(next_hop_dev, &ib->remote_netdev);
- if (retval) {
- VLOG_WARN_RL(&rl, "cannot open netdev %s (next hop "
- "to controller "IP_FMT"): %s",
- next_hop_dev, IP_ARGS(&ib->controller_ip),
- strerror(retval));
- free(next_hop_dev);
- ib->next_remote_refresh = now + 1;
- return NULL;
- }
- }
- free(next_hop_dev);
+ /* Get the next-hop IP and network device. */
+ if (!r->remote_netdev
+ || strcmp(netdev_get_name(r->remote_netdev), next_hop_dev))
+ {
+ netdev_close(r->remote_netdev);
- /* Look up the MAC address of the next-hop IP address. */
- retval = netdev_arp_lookup(ib->remote_netdev, r_in4.s_addr,
- ib->remote_mac);
+ retval = netdev_open_default(next_hop_dev, &r->remote_netdev);
if (retval) {
- VLOG_DBG_RL(&rl, "cannot look up remote MAC address ("IP_FMT"): %s",
- IP_ARGS(&r_in4.s_addr), strerror(retval));
- }
- have_mac = !eth_addr_is_zero(ib->remote_mac);
- if (have_mac
- && !eth_addr_equals(ib->last_remote_mac, ib->remote_mac)) {
- VLOG_DBG("remote MAC address changed from "ETH_ADDR_FMT" to "
- ETH_ADDR_FMT,
- ETH_ADDR_ARGS(ib->last_remote_mac),
- ETH_ADDR_ARGS(ib->remote_mac));
- memcpy(ib->last_remote_mac, ib->remote_mac, ETH_ADDR_LEN);
+ VLOG_WARN_RL(&rl, "cannot open netdev %s (next hop "
+ "to controller "IP_FMT"): %s",
+ next_hop_dev, IP_ARGS(&r->remote_ip),
+ strerror(retval));
+ free(next_hop_dev);
+ return 1;
}
-
- /* Schedule next refresh.
- *
- * If we have an IP address but not a MAC address, then refresh
- * quickly, since we probably will get a MAC address soon (via ARP).
- * Otherwise, we can afford to wait a little while. */
- ib->next_remote_refresh
- = now + (!ib->controller_ip || have_mac ? 10 : 1);
+ }
+ free(next_hop_dev);
+
+ /* Look up the MAC address of the next-hop IP address. */
+ retval = netdev_arp_lookup(r->remote_netdev, next_hop_inaddr.s_addr,
+ r->remote_mac);
+ if (retval) {
+ VLOG_DBG_RL(&rl, "cannot look up remote MAC address ("IP_FMT"): %s",
+ IP_ARGS(&next_hop_inaddr.s_addr), strerror(retval));
}
- return !eth_addr_is_zero(ib->remote_mac) ? ib->remote_mac : NULL;
+ /* If we have an IP address but not a MAC address, then refresh quickly,
+ * since we probably will get a MAC address soon (via ARP). Otherwise, we
+ * can afford to wait a little while. */
+ return r->remote_ip && eth_addr_is_zero(r->remote_mac) ? 1 : 10;
}
-static const uint8_t *
-get_local_mac(struct in_band *ib)
+static bool
+refresh_remotes(struct in_band *ib)
{
- time_t now = time_now();
- if (now >= ib->next_local_refresh) {
- uint8_t ea[ETH_ADDR_LEN];
- if (ib->local_netdev && !netdev_get_etheraddr(ib->local_netdev, ea)) {
- memcpy(ib->local_mac, ea, ETH_ADDR_LEN);
+ struct in_band_remote *r;
+ bool any_changes;
+ int min_refresh;
+
+ if (time_now() < ib->next_remote_refresh) {
+ return false;
+ }
+
+ any_changes = false;
+ min_refresh = 10;
+ for (r = ib->remotes; r < &ib->remotes[ib->n_remotes]; r++) {
+ uint8_t old_remote_mac[ETH_ADDR_LEN];
+ uint32_t old_remote_ip;
+ int refresh_interval;
+
+ /* Save old remote information. */
+ old_remote_ip = r->remote_ip;
+ memcpy(old_remote_mac, r->remote_mac, ETH_ADDR_LEN);
+
+ /* Refresh remote information. */
+ refresh_interval = refresh_remote(ib, r);
+ min_refresh = MIN(min_refresh, refresh_interval);
+
+ /* If anything changed, log the changes. */
+ if (old_remote_ip != r->remote_ip) {
+ any_changes = true;
+ if (r->remote_ip) {
+ VLOG_DBG("remote IP address changed from "IP_FMT" to "IP_FMT,
+ IP_ARGS(&old_remote_ip), IP_ARGS(&r->remote_ip));
+ }
+ }
+ if (!eth_addr_equals(r->remote_mac, old_remote_mac)) {
+ any_changes = true;
+ if (!eth_addr_is_zero(r->remote_mac)
+ && !eth_addr_equals(r->last_remote_mac, r->remote_mac)) {
+ VLOG_DBG("remote MAC address changed from "ETH_ADDR_FMT
+ " to "ETH_ADDR_FMT,
+ ETH_ADDR_ARGS(r->last_remote_mac),
+ ETH_ADDR_ARGS(r->remote_mac));
+ memcpy(r->last_remote_mac, r->remote_mac, ETH_ADDR_LEN);
+ }
}
- ib->next_local_refresh = now + 1;
}
- return !eth_addr_is_zero(ib->local_mac) ? ib->local_mac : NULL;
+ ib->next_remote_refresh = time_now() + min_refresh;
+
+ return any_changes;
}
-static void
-in_band_status_cb(struct status_reply *sr, void *in_band_)
+/* Refreshes the MAC address of the local port into ib->local_mac, if it is due
+ * for a refresh. Returns true if anything changed, otherwise false. */
+static bool
+refresh_local(struct in_band *ib)
{
- struct in_band *in_band = in_band_;
+ uint8_t ea[ETH_ADDR_LEN];
+ time_t now;
- if (!eth_addr_is_zero(in_band->local_mac)) {
- status_reply_put(sr, "local-mac="ETH_ADDR_FMT,
- ETH_ADDR_ARGS(in_band->local_mac));
+ now = time_now();
+ if (now < ib->next_local_refresh) {
+ return false;
}
+ ib->next_local_refresh = now + 1;
- if (!eth_addr_is_zero(in_band->remote_mac)) {
- status_reply_put(sr, "remote-mac="ETH_ADDR_FMT,
- ETH_ADDR_ARGS(in_band->remote_mac));
+ if (netdev_get_etheraddr(ib->local_netdev, ea)
+ || eth_addr_equals(ea, ib->local_mac)) {
+ return false;
}
-}
-static void
-drop_flow(struct in_band *in_band, int rule_idx)
-{
- struct ib_rule *rule = &in_band->rules[rule_idx];
-
- if (rule->installed) {
- rule->installed = false;
- ofproto_delete_flow(in_band->ofproto, &rule->flow, rule->wildcards,
- rule->priority);
- }
+ memcpy(ib->local_mac, ea, ETH_ADDR_LEN);
+ return true;
}
-/* out_port and fixed_fields are assumed never to change. */
static void
-set_up_flow(struct in_band *in_band, int rule_idx, const flow_t *flow,
- uint32_t fixed_fields, uint16_t out_port)
+in_band_status_cb(struct status_reply *sr, void *in_band_)
{
- struct ib_rule *rule = &in_band->rules[rule_idx];
-
- if (!rule->installed || memcmp(flow, &rule->flow, sizeof *flow)) {
- union ofp_action action;
-
- drop_flow(in_band, rule_idx);
+ struct in_band *in_band = in_band_;
- rule->installed = true;
- rule->flow = *flow;
- rule->wildcards = OVSFW_ALL & ~fixed_fields;
- rule->priority = IB_BASE_PRIORITY + (N_IB_RULES - rule_idx);
+ if (!eth_addr_is_zero(in_band->local_mac)) {
+ status_reply_put(sr, "local-mac="ETH_ADDR_FMT,
+ ETH_ADDR_ARGS(in_band->local_mac));
+ }
- action.type = htons(OFPAT_OUTPUT);
- action.output.len = htons(sizeof action);
- action.output.port = htons(out_port);
- action.output.max_len = htons(0);
- ofproto_add_flow(in_band->ofproto, &rule->flow, rule->wildcards,
- rule->priority, &action, 1, 0);
+ if (in_band->n_remotes
+ && !eth_addr_is_zero(in_band->remotes[0].remote_mac)) {
+ status_reply_put(sr, "remote-mac="ETH_ADDR_FMT,
+ ETH_ADDR_ARGS(in_band->remotes[0].remote_mac));
}
}
&& flow->tp_dst == htons(DHCP_CLIENT_PORT)
&& packet->l7) {
struct dhcp_header *dhcp;
- const uint8_t *local_mac;
dhcp = ofpbuf_at(packet, (char *)packet->l7 - (char *)packet->data,
sizeof *dhcp);
return false;
}
- local_mac = get_local_mac(in_band);
- if (local_mac && eth_addr_equals(dhcp->chaddr, local_mac)) {
+ refresh_local(in_band);
+ if (!eth_addr_is_zero(in_band->local_mac)
+ && eth_addr_equals(dhcp->chaddr, in_band->local_mac)) {
return true;
}
}
return true;
}
-void
-in_band_run(struct in_band *in_band)
+static void
+init_rule(struct in_band_rule *rule, unsigned int priority)
{
- time_t now = time_now();
- uint32_t controller_ip;
- const uint8_t *remote_mac;
- const uint8_t *local_mac;
- flow_t flow;
+ rule->wildcards = OVSFW_ALL;
+ rule->priority = priority;
- if (now < in_band->next_remote_refresh
- && now < in_band->next_local_refresh) {
- return;
- }
+ /* Not strictly necessary but seems cleaner. */
+ memset(&rule->flow, 0, sizeof rule->flow);
+}
- controller_ip = rconn_get_remote_ip(in_band->controller);
- if (in_band->controller_ip && controller_ip != in_band->controller_ip) {
- VLOG_DBG("controller IP address changed from "IP_FMT" to "IP_FMT,
- IP_ARGS(&in_band->controller_ip),
- IP_ARGS(&controller_ip));
- }
- in_band->controller_ip = controller_ip;
+static void
+set_in_port(struct in_band_rule *rule, uint16_t odp_port)
+{
+ rule->wildcards &= ~OFPFW_IN_PORT;
+ rule->flow.in_port = odp_port;
+}
+
+static void
+set_dl_type(struct in_band_rule *rule, uint16_t dl_type)
+{
+ rule->wildcards &= ~OFPFW_DL_TYPE;
+ rule->flow.dl_type = htons(dl_type);
+}
+
+static void
+set_dl_src(struct in_band_rule *rule, const uint8_t dl_src[ETH_ADDR_LEN])
+{
+ rule->wildcards &= ~OFPFW_DL_SRC;
+ memcpy(rule->flow.dl_src, dl_src, ETH_ADDR_LEN);
+}
+
+static void
+set_dl_dst(struct in_band_rule *rule, const uint8_t dl_dst[ETH_ADDR_LEN])
+{
+ rule->wildcards &= ~OFPFW_DL_DST;
+ memcpy(rule->flow.dl_dst, dl_dst, ETH_ADDR_LEN);
+}
+
+static void
+set_tp_src(struct in_band_rule *rule, uint16_t tp_src)
+{
+ rule->wildcards &= ~OFPFW_TP_SRC;
+ rule->flow.tp_src = htons(tp_src);
+}
+
+static void
+set_tp_dst(struct in_band_rule *rule, uint16_t tp_dst)
+{
+ rule->wildcards &= ~OFPFW_TP_DST;
+ rule->flow.tp_dst = htons(tp_dst);
+}
+
+static void
+set_nw_proto(struct in_band_rule *rule, uint8_t nw_proto)
+{
+ rule->wildcards &= ~OFPFW_NW_PROTO;
+ rule->flow.nw_proto = nw_proto;
+}
- remote_mac = get_remote_mac(in_band);
- local_mac = get_local_mac(in_band);
+static void
+set_nw_src(struct in_band_rule *rule, uint32_t nw_src)
+{
+ rule->wildcards &= ~OFPFW_NW_SRC_MASK;
+ rule->flow.nw_src = nw_src;
+}
- if (local_mac) {
+static void
+set_nw_dst(struct in_band_rule *rule, uint32_t nw_dst)
+{
+ rule->wildcards &= ~OFPFW_NW_DST_MASK;
+ rule->flow.nw_dst = nw_dst;
+}
+
+static void
+make_rules(struct in_band *ib,
+ void (*cb)(struct in_band *, const struct in_band_rule *))
+{
+ struct in_band_rule rule;
+ size_t i;
+
+ if (!eth_addr_is_zero(ib->installed_local_mac)) {
/* Allow DHCP requests to be sent from the local port. */
- memset(&flow, 0, sizeof flow);
- flow.in_port = ODPP_LOCAL;
- flow.dl_type = htons(ETH_TYPE_IP);
- memcpy(flow.dl_src, local_mac, ETH_ADDR_LEN);
- flow.nw_proto = IP_TYPE_UDP;
- flow.tp_src = htons(DHCP_CLIENT_PORT);
- flow.tp_dst = htons(DHCP_SERVER_PORT);
- set_up_flow(in_band, IBR_FROM_LOCAL_DHCP, &flow,
- (OFPFW_IN_PORT | OFPFW_DL_TYPE | OFPFW_DL_SRC
- | OFPFW_NW_PROTO | OFPFW_TP_SRC | OFPFW_TP_DST),
- OFPP_NORMAL);
+ init_rule(&rule, IBR_FROM_LOCAL_DHCP);
+ set_in_port(&rule, ODPP_LOCAL);
+ set_dl_type(&rule, ETH_TYPE_IP);
+ set_dl_src(&rule, ib->installed_local_mac);
+ set_nw_proto(&rule, IP_TYPE_UDP);
+ set_tp_src(&rule, DHCP_CLIENT_PORT);
+ set_tp_dst(&rule, DHCP_SERVER_PORT);
+ cb(ib, &rule);
/* Allow the connection's interface to receive directed ARP traffic. */
- memset(&flow, 0, sizeof flow);
- flow.dl_type = htons(ETH_TYPE_ARP);
- memcpy(flow.dl_dst, local_mac, ETH_ADDR_LEN);
- flow.nw_proto = ARP_OP_REPLY;
- set_up_flow(in_band, IBR_TO_LOCAL_ARP, &flow,
- (OFPFW_DL_TYPE | OFPFW_DL_DST | OFPFW_NW_PROTO),
- OFPP_NORMAL);
+ init_rule(&rule, IBR_TO_LOCAL_ARP);
+ set_dl_type(&rule, ETH_TYPE_ARP);
+ set_dl_dst(&rule, ib->installed_local_mac);
+ set_nw_proto(&rule, ARP_OP_REPLY);
+ cb(ib, &rule);
/* Allow the connection's interface to be the source of ARP traffic. */
- memset(&flow, 0, sizeof flow);
- flow.dl_type = htons(ETH_TYPE_ARP);
- memcpy(flow.dl_src, local_mac, ETH_ADDR_LEN);
- flow.nw_proto = ARP_OP_REQUEST;
- set_up_flow(in_band, IBR_FROM_LOCAL_ARP, &flow,
- (OFPFW_DL_TYPE | OFPFW_DL_SRC | OFPFW_NW_PROTO),
- OFPP_NORMAL);
- } else {
- drop_flow(in_band, IBR_FROM_LOCAL_DHCP);
- drop_flow(in_band, IBR_TO_LOCAL_ARP);
- drop_flow(in_band, IBR_FROM_LOCAL_ARP);
+ init_rule(&rule, IBR_FROM_LOCAL_ARP);
+ set_dl_type(&rule, ETH_TYPE_ARP);
+ set_dl_src(&rule, ib->installed_local_mac);
+ set_nw_proto(&rule, ARP_OP_REQUEST);
+ cb(ib, &rule);
}
- if (remote_mac) {
+ for (i = 0; i < ib->n_remote_macs; i++) {
+ const uint8_t *remote_mac = &ib->remote_macs[i * ETH_ADDR_LEN];
+
+ if (i > 0) {
+ const uint8_t *prev_mac = &ib->remote_macs[(i - 1) * ETH_ADDR_LEN];
+ if (eth_addr_equals(remote_mac, prev_mac)) {
+ /* Skip duplicates. */
+ continue;
+ }
+ }
+
/* Allow ARP replies to the remote side's MAC. */
- memset(&flow, 0, sizeof flow);
- flow.dl_type = htons(ETH_TYPE_ARP);
- memcpy(flow.dl_dst, remote_mac, ETH_ADDR_LEN);
- flow.nw_proto = ARP_OP_REPLY;
- set_up_flow(in_band, IBR_TO_REMOTE_ARP, &flow,
- (OFPFW_DL_TYPE | OFPFW_DL_DST | OFPFW_NW_PROTO),
- OFPP_NORMAL);
-
- /* Allow ARP requests from the remote side's MAC. */
- memset(&flow, 0, sizeof flow);
- flow.dl_type = htons(ETH_TYPE_ARP);
- memcpy(flow.dl_src, remote_mac, ETH_ADDR_LEN);
- flow.nw_proto = ARP_OP_REQUEST;
- set_up_flow(in_band, IBR_FROM_REMOTE_ARP, &flow,
- (OFPFW_DL_TYPE | OFPFW_DL_SRC | OFPFW_NW_PROTO),
- OFPP_NORMAL);
- } else {
- drop_flow(in_band, IBR_TO_REMOTE_ARP);
- drop_flow(in_band, IBR_FROM_REMOTE_ARP);
+ init_rule(&rule, IBR_TO_REMOTE_ARP);
+ set_dl_type(&rule, ETH_TYPE_ARP);
+ set_dl_dst(&rule, remote_mac);
+ set_nw_proto(&rule, ARP_OP_REPLY);
+ cb(ib, &rule);
+
+ /* Allow ARP requests from the remote side's MAC. */
+ init_rule(&rule, IBR_FROM_REMOTE_ARP);
+ set_dl_type(&rule, ETH_TYPE_ARP);
+ set_dl_src(&rule, remote_mac);
+ set_nw_proto(&rule, ARP_OP_REQUEST);
+ cb(ib, &rule);
}
- if (controller_ip) {
+ for (i = 0; i < ib->n_remote_ips; i++) {
+ uint32_t remote_ip = ib->remote_ips[i];
+
+ if (i > 0 && ib->remote_ips[i - 1] == remote_ip) {
+ /* Skip duplicates. */
+ continue;
+ }
+
/* Allow ARP replies to the controller's IP. */
- memset(&flow, 0, sizeof flow);
- flow.dl_type = htons(ETH_TYPE_ARP);
- flow.nw_proto = ARP_OP_REPLY;
- flow.nw_dst = controller_ip;
- set_up_flow(in_band, IBR_TO_CTL_ARP, &flow,
- (OFPFW_DL_TYPE | OFPFW_NW_PROTO | OFPFW_NW_DST_MASK),
- OFPP_NORMAL);
-
- /* Allow ARP requests from the controller's IP. */
- memset(&flow, 0, sizeof flow);
- flow.dl_type = htons(ETH_TYPE_ARP);
- flow.nw_proto = ARP_OP_REQUEST;
- flow.nw_src = controller_ip;
- set_up_flow(in_band, IBR_FROM_CTL_ARP, &flow,
- (OFPFW_DL_TYPE | OFPFW_NW_PROTO | OFPFW_NW_SRC_MASK),
- OFPP_NORMAL);
-
- /* OpenFlow traffic to or from the controller.
- *
- * (A given field's value is completely ignored if it is wildcarded,
- * which is why we can get away with using a single 'flow' in each
- * case here.) */
- memset(&flow, 0, sizeof flow);
- flow.dl_type = htons(ETH_TYPE_IP);
- flow.nw_proto = IP_TYPE_TCP;
- flow.nw_src = controller_ip;
- flow.nw_dst = controller_ip;
- flow.tp_src = htons(OFP_TCP_PORT);
- flow.tp_dst = htons(OFP_TCP_PORT);
- set_up_flow(in_band, IBR_TO_CTL_OFP, &flow,
- (OFPFW_DL_TYPE | OFPFW_NW_PROTO | OFPFW_NW_DST_MASK
- | OFPFW_TP_DST), OFPP_NORMAL);
- set_up_flow(in_band, IBR_FROM_CTL_OFP, &flow,
- (OFPFW_DL_TYPE | OFPFW_NW_PROTO | OFPFW_NW_SRC_MASK
- | OFPFW_TP_SRC), OFPP_NORMAL);
- } else {
- drop_flow(in_band, IBR_TO_CTL_ARP);
- drop_flow(in_band, IBR_FROM_CTL_ARP);
- drop_flow(in_band, IBR_TO_CTL_OFP);
- drop_flow(in_band, IBR_FROM_CTL_OFP);
+ init_rule(&rule, IBR_TO_CTL_ARP);
+ set_dl_type(&rule, ETH_TYPE_ARP);
+ set_nw_proto(&rule, ARP_OP_REPLY);
+ set_nw_dst(&rule, remote_ip);
+ cb(ib, &rule);
+
+ /* Allow ARP requests from the controller's IP. */
+ init_rule(&rule, IBR_FROM_CTL_ARP);
+ set_dl_type(&rule, ETH_TYPE_ARP);
+ set_nw_proto(&rule, ARP_OP_REQUEST);
+ set_nw_src(&rule, remote_ip);
+ cb(ib, &rule);
+
+ /* OpenFlow traffic to the controller. */
+ init_rule(&rule, IBR_TO_CTL_OFP);
+ set_dl_type(&rule, ETH_TYPE_IP);
+ set_nw_proto(&rule, IP_TYPE_TCP);
+ set_nw_dst(&rule, remote_ip);
+ set_tp_dst(&rule, OFP_TCP_PORT);
+ cb(ib, &rule);
+
+ /* OpenFlow traffic from the controller. */
+ init_rule(&rule, IBR_FROM_CTL_OFP);
+ set_dl_type(&rule, ETH_TYPE_IP);
+ set_nw_proto(&rule, IP_TYPE_TCP);
+ set_nw_src(&rule, remote_ip);
+ set_tp_src(&rule, OFP_TCP_PORT);
+ cb(ib, &rule);
}
}
+static void
+clear_rules(struct in_band *ib)
+{
+ memset(ib->installed_local_mac, 0, sizeof ib->installed_local_mac);
+
+ free(ib->remote_ips);
+ ib->remote_ips = NULL;
+ ib->n_remote_ips = 0;
+
+ free(ib->remote_macs);
+ ib->remote_macs = NULL;
+ ib->n_remote_macs = 0;
+}
+
+static void
+drop_rule(struct in_band *ib, const struct in_band_rule *rule)
+{
+ ofproto_delete_flow(ib->ofproto, &rule->flow,
+ rule->wildcards, rule->priority);
+}
+
+static void
+drop_rules(struct in_band *ib)
+{
+ make_rules(ib, drop_rule);
+ clear_rules(ib);
+}
+
+static void
+add_rule(struct in_band *ib, const struct in_band_rule *rule)
+{
+ union ofp_action action;
+
+ action.type = htons(OFPAT_OUTPUT);
+ action.output.len = htons(sizeof action);
+ action.output.port = htons(OFPP_NORMAL);
+ action.output.max_len = htons(0);
+ ofproto_add_flow(ib->ofproto, &rule->flow, rule->wildcards,
+ rule->priority, &action, 1, 0);
+}
+
+static void
+add_rules(struct in_band *ib)
+{
+ make_rules(ib, add_rule);
+}
+
+static int
+compare_ips(const void *a, const void *b)
+{
+ return memcmp(a, b, sizeof(uint32_t));
+}
+
+static int
+compare_macs(const void *a, const void *b)
+{
+ return memcmp(a, b, ETH_ADDR_LEN);
+}
+
+void
+in_band_run(struct in_band *ib)
+{
+ struct in_band_remote *r;
+
+ if (!refresh_local(ib) && !refresh_remotes(ib)) {
+ /* Nothing changed, nothing to do. */
+ return;
+ }
+
+ /* Drop old rules. */
+ drop_rules(ib);
+
+ /* Figure out new rules. */
+ memcpy(ib->installed_local_mac, ib->local_mac, ETH_ADDR_LEN);
+ ib->remote_ips = xmalloc(ib->n_remotes * sizeof *ib->remote_ips);
+ ib->n_remote_ips = 0;
+ ib->remote_macs = xmalloc(ib->n_remotes * ETH_ADDR_LEN);
+ ib->n_remote_macs = 0;
+ for (r = ib->remotes; r < &ib->remotes[ib->n_remotes]; r++) {
+ if (r->remote_ip) {
+ ib->remote_ips[ib->n_remote_ips++] = r->remote_ip;
+ }
+ if (!eth_addr_is_zero(r->remote_mac)) {
+ memcpy(&ib->remote_macs[ib->n_remote_macs * ETH_ADDR_LEN],
+ r->remote_mac, ETH_ADDR_LEN);
+ ib->n_remote_macs++;
+ }
+ }
+
+ /* Sort, to allow make_rules() to easily skip duplicates. */
+ qsort(ib->remote_ips, ib->n_remote_ips, sizeof *ib->remote_ips,
+ compare_ips);
+ qsort(ib->remote_macs, ib->n_remote_macs, ETH_ADDR_LEN, compare_macs);
+
+ /* Add new rules. */
+ add_rules(ib);
+}
+
void
in_band_wait(struct in_band *in_band)
{
void
in_band_flushed(struct in_band *in_band)
{
- int i;
-
- for (i = 0; i < N_IB_RULES; i++) {
- in_band->rules[i].installed = false;
- }
+ clear_rules(in_band);
}
int
in_band_create(struct ofproto *ofproto, struct dpif *dpif,
- struct switch_status *ss, struct rconn *controller,
- struct in_band **in_bandp)
+ struct switch_status *ss, struct in_band **in_bandp)
{
struct in_band *in_band;
char local_name[IF_NAMESIZE];
in_band = xzalloc(sizeof *in_band);
in_band->ofproto = ofproto;
- in_band->controller = controller;
in_band->ss_cat = switch_status_register(ss, "in-band",
in_band_status_cb, in_band);
- in_band->local_netdev = local_netdev;
- in_band->next_local_refresh = TIME_MIN;
- in_band->remote_netdev = NULL;
in_band->next_remote_refresh = TIME_MIN;
+ in_band->next_local_refresh = TIME_MIN;
+ in_band->local_netdev = local_netdev;
*in_bandp = in_band;
}
void
-in_band_destroy(struct in_band *in_band)
+in_band_destroy(struct in_band *ib)
{
- if (in_band) {
- int i;
+ if (ib) {
+ drop_rules(ib);
+ in_band_set_remotes(ib, NULL, 0);
+ switch_status_unregister(ib->ss_cat);
+ netdev_close(ib->local_netdev);
+ free(ib);
+ }
+}
- for (i = 0; i < N_IB_RULES; i++) {
- drop_flow(in_band, i);
+void
+in_band_set_remotes(struct in_band *ib, struct rconn **remotes, size_t n)
+{
+ size_t i;
+
+ /* Optimize the case where the rconns are the same as last time. */
+ if (n == ib->n_remotes) {
+ for (i = 0; i < n; i++) {
+ if (ib->remotes[i].rconn != remotes[i]) {
+ goto different;
+ }
}
+ return;
- switch_status_unregister(in_band->ss_cat);
- netdev_close(in_band->local_netdev);
- netdev_close(in_band->remote_netdev);
+ different:;
+ }
+
+ for (i = 0; i < ib->n_remotes; i++) {
/* We don't own the rconn. */
- free(in_band);
+ netdev_close(ib->remotes[i].remote_netdev);
}
-}
+ free(ib->remotes);
+ ib->next_remote_refresh = TIME_MIN;
+ ib->remotes = n ? xzalloc(n * sizeof *ib->remotes) : 0;
+ ib->n_remotes = n;
+ for (i = 0; i < n; i++) {
+ ib->remotes[i].rconn = remotes[i];
+ }
+}
projects / openvswitch / commitdiff