#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
+#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include "buffer.h"
#include "chain.h"
+#include "csum.h"
#include "flow.h"
#include "netdev.h"
#include "packets.h"
#include "rconn.h"
#include "vconn.h"
#include "table.h"
+#include "timeval.h"
#include "xtoxll.h"
#define THIS_MODULE VLM_datapath
#define BRIDGE_PORT_NO_FLOOD 0x00000001
/* Capabilities supported by this implementation. */
-#define OFP_SUPPORTED_CAPABILITIES (OFPC_MULTI_PHY_TX)
+#define OFP_SUPPORTED_CAPABILITIES ( OFPC_FLOW_STATS \
+ | OFPC_TABLE_STATS \
+ | OFPC_PORT_STATS \
+ | OFPC_MULTI_PHY_TX )
/* Actions supported by this implementation. */
#define OFP_SUPPORTED_ACTIONS ( (1 << OFPAT_OUTPUT) \
unsigned long long int rx_count, tx_count, drop_count;
};
+/* The origin of a received OpenFlow message, to enable sending a reply. */
+struct sender {
+ struct remote *remote; /* The device that sent the message. */
+ uint32_t xid; /* The OpenFlow transaction ID. */
+};
+
/* A connection to a controller or a management device. */
struct remote {
struct list node;
struct rconn *rconn;
-};
-/* The origin of a received OpenFlow message, to enable sending a reply. */
-struct sender {
- struct remote *remote; /* The device that sent the message. */
- uint32_t xid; /* The OpenFlow transaction ID. */
+ /* Support for reliable, multi-message replies to requests.
+ *
+ * If an incoming request needs to have a reliable reply that might
+ * require multiple messages, it can use remote_start_dump() to set up
+ * a callback that will be called as buffer space for replies. */
+ int (*cb_dump)(struct datapath *, void *aux);
+ void (*cb_done)(void *aux);
+ void *cb_aux;
};
struct datapath {
struct sw_chain *chain; /* Forwarding rules. */
- struct ofp_switch_config config;
+ /* Configuration set from controller. */
+ uint16_t flags;
+ uint16_t miss_send_len;
/* Switch ports. */
struct sw_port ports[OFPP_MAX];
void dp_update_port_flags(struct datapath *dp, const struct ofp_phy_port *opp);
void dp_output_control(struct datapath *, struct buffer *, int in_port,
size_t max_len, int reason);
-static void send_flow_expired(struct datapath *, struct sw_flow *);
+static void send_flow_expired(struct datapath *, struct sw_flow *,
+ enum ofp_flow_expired_reason);
static void send_port_status(struct sw_port *p, uint8_t status);
static void del_switch_port(struct sw_port *p);
static void execute_actions(struct datapath *, struct buffer *,
#define PKT_COOKIE_BITS (32 - PKT_BUFFER_BITS)
+int run_flow_through_tables(struct datapath *, struct buffer *, int in_port);
void fwd_port_input(struct datapath *, struct buffer *, int in_port);
int fwd_control_input(struct datapath *, const struct sender *,
const void *, size_t);
return p - dp->ports;
}
-/* Generates a unique datapath id. It incorporates the datapath index
- * and a hardware address, if available. If not, it generates a random
- * one.
- */
+/* Generates and returns a random datapath id. */
static uint64_t
gen_datapath_id(void)
{
- /* Choose a random datapath id. */
- uint64_t id = 0;
- int i;
-
- srand(time(0));
-
- for (i = 0; i < ETH_ADDR_LEN; i++) {
- id |= (uint64_t)(rand() & 0xff) << (8*(ETH_ADDR_LEN-1 - i));
- }
-
- return id;
+ uint8_t ea[ETH_ADDR_LEN];
+ eth_addr_random(ea);
+ return eth_addr_to_uint64(ea);
}
int
return ENOMEM;
}
- dp->last_timeout = time(0);
+ dp->last_timeout = time_now();
list_init(&dp->remotes);
dp->controller = remote_create(dp, rconn);
dp->listen_vconn = NULL;
}
list_init(&dp->port_list);
- dp->config.flags = 0;
- dp->config.miss_send_len = htons(OFP_DEFAULT_MISS_SEND_LEN);
+ dp->flags = 0;
+ dp->miss_send_len = OFP_DEFAULT_MISS_SEND_LEN;
*dp_ = dp;
return 0;
}
dp_add_port(struct datapath *dp, const char *name)
{
struct netdev *netdev;
+ struct in6_addr in6;
+ struct in_addr in4;
struct sw_port *p;
int error;
- error = netdev_open(name, &netdev);
+ error = netdev_open(name, NETDEV_ETH_TYPE_ANY, &netdev);
if (error) {
return error;
}
+ error = netdev_set_flags(netdev, NETDEV_UP | NETDEV_PROMISC, false);
+ if (error) {
+ VLOG_ERR("Couldn't set promiscuous mode on %s device", name);
+ netdev_close(netdev);
+ return error;
+ }
+ if (netdev_get_in4(netdev, &in4)) {
+ VLOG_ERR("%s device has assigned IP address %s", name, inet_ntoa(in4));
+ }
+ if (netdev_get_in6(netdev, &in6)) {
+ char in6_name[INET6_ADDRSTRLEN + 1];
+ inet_ntop(AF_INET6, &in6, in6_name, sizeof in6_name);
+ VLOG_ERR("%s device has assigned IPv6 address %s", name, in6_name);
+ }
for (p = dp->ports; ; p++) {
if (p >= &dp->ports[ARRAY_SIZE(dp->ports)]) {
}
void
-dp_run(struct datapath *dp)
+dp_run(struct datapath *dp)
{
- time_t now = time(0);
+ time_t now = time_now();
struct sw_port *p, *pn;
struct remote *r, *rn;
struct buffer *buffer = NULL;
chain_timeout(dp->chain, &deleted);
LIST_FOR_EACH_SAFE (f, n, struct sw_flow, node, &deleted) {
- send_flow_expired(dp, f);
+ send_flow_expired(dp, f, f->reason);
list_remove(&f->node);
flow_free(f);
}
rconn_run(r->rconn);
- /* Process a number of commands from the remote, but cap them at a
- * reasonable number so that other processing doesn't starve. */
+ /* Do some remote processing, but cap it at a reasonable amount so that
+ * other processing doesn't starve. */
for (i = 0; i < 50; i++) {
- struct buffer *buffer;
- struct ofp_header *oh;
+ if (!r->cb_dump) {
+ struct buffer *buffer;
+ struct ofp_header *oh;
- buffer = rconn_recv(r->rconn);
- if (!buffer) {
- break;
- }
+ buffer = rconn_recv(r->rconn);
+ if (!buffer) {
+ break;
+ }
- if (buffer->size >= sizeof *oh) {
- struct sender sender;
+ if (buffer->size >= sizeof *oh) {
+ struct sender sender;
- oh = buffer->data;
- sender.remote = r;
- sender.xid = oh->xid;
- fwd_control_input(dp, &sender, buffer->data, buffer->size);
+ oh = buffer->data;
+ sender.remote = r;
+ sender.xid = oh->xid;
+ fwd_control_input(dp, &sender, buffer->data, buffer->size);
+ } else {
+ VLOG_WARN("received too-short OpenFlow message");
+ }
+ buffer_delete(buffer);
} else {
- VLOG_WARN("received too-short OpenFlow message");
+ if (!rconn_is_full(r->rconn)) {
+ int error = r->cb_dump(dp, r->cb_aux);
+ if (error <= 0) {
+ if (error) {
+ VLOG_WARN("dump callback error: %s", strerror(-error));
+ }
+ r->cb_done(r->cb_aux);
+ r->cb_dump = NULL;
+ }
+ } else {
+ break;
+ }
}
- buffer_delete(buffer);
}
if (!rconn_is_alive(r->rconn)) {
remote_destroy(struct remote *r)
{
if (r) {
+ if (r->cb_dump && r->cb_done) {
+ r->cb_done(r->cb_aux);
+ }
list_remove(&r->node);
rconn_destroy(r->rconn);
free(r);
struct remote *remote = xmalloc(sizeof *remote);
list_push_back(&dp->remotes, &remote->node);
remote->rconn = rconn;
+ remote->cb_dump = NULL;
return remote;
}
+/* Starts a callback-based, reliable, possibly multi-message reply to a
+ * request made by 'remote'.
+ *
+ * 'dump' designates a function that will be called when the 'remote' send
+ * queue has an empty slot. It should compose a message and send it on
+ * 'remote'. On success, it should return 1 if it should be called again when
+ * another send queue slot opens up, 0 if its transmissions are complete, or a
+ * negative errno value on failure.
+ *
+ * 'done' designates a function to clean up any resources allocated for the
+ * dump. It must handle being called before the dump is complete (which will
+ * happen if 'remote' is closed unexpectedly).
+ *
+ * 'aux' is passed to 'dump' and 'done'. */
+static void
+remote_start_dump(struct remote *remote,
+ int (*dump)(struct datapath *, void *),
+ void (*done)(void *),
+ void *aux)
+{
+ assert(!remote->cb_dump);
+ remote->cb_dump = dump;
+ remote->cb_done = done;
+ remote->cb_aux = aux;
+}
+
void
dp_wait(struct datapath *dp)
{
free(dp);
}
+/* Send packets out all the ports except the originating one. If the
+ * "flood" argument is set, don't send out ports with flooding disabled.
+ */
static int
-flood(struct datapath *dp, struct buffer *buffer, int in_port)
+output_all(struct datapath *dp, struct buffer *buffer, int in_port, int flood)
{
struct sw_port *p;
int prev_port;
prev_port = -1;
LIST_FOR_EACH (p, struct sw_port, node, &dp->port_list) {
- if (port_no(dp, p) == in_port || p->flags & BRIDGE_PORT_NO_FLOOD) {
+ if (port_no(dp, p) == in_port) {
+ continue;
+ }
+ if (flood && p->flags & BRIDGE_PORT_NO_FLOOD) {
continue;
}
if (prev_port != -1) {
assert(buffer);
if (out_port == OFPP_FLOOD) {
- flood(dp, buffer, in_port);
+ output_all(dp, buffer, in_port, 1);
+ } else if (out_port == OFPP_ALL) {
+ output_all(dp, buffer, in_port, 0);
} else if (out_port == OFPP_CONTROLLER) {
dp_output_control(dp, buffer, in_port, 0, OFPR_ACTION);
} else if (out_port == OFPP_TABLE) {
- struct sw_flow_key key;
- struct sw_flow *flow;
-
- key.wildcards = 0;
- flow_extract(buffer, in_port, &key.flow);
- flow = chain_lookup(dp->chain, &key);
- if (flow != NULL) {
- flow_used(flow, buffer);
- execute_actions(dp, buffer, in_port, &key,
- flow->actions, flow->n_actions);
+ if (run_flow_through_tables(dp, buffer, in_port)) {
+ buffer_delete(buffer);
}
} else {
output_packet(dp, buffer, out_port);
}
static void *
-alloc_openflow_buffer(struct datapath *dp, size_t openflow_len, uint8_t type,
- const struct sender *sender, struct buffer **bufferp)
+make_openflow_reply(size_t openflow_len, uint8_t type,
+ const struct sender *sender, struct buffer **bufferp)
{
- struct buffer *buffer;
- struct ofp_header *oh;
-
- buffer = *bufferp = buffer_new(openflow_len);
- oh = buffer_put_uninit(buffer, openflow_len);
- oh->version = OFP_VERSION;
- oh->type = type;
- oh->length = 0; /* Filled in by send_openflow_buffer(). */
- oh->xid = sender ? sender->xid : 0;
- return oh;
+ return make_openflow_xid(openflow_len, type, sender ? sender->xid : 0,
+ bufferp);
}
static int
{
struct remote *remote = sender ? sender->remote : dp->controller;
struct rconn *rconn = remote->rconn;
- struct ofp_header *oh;
int retval;
- oh = buffer_at_assert(buffer, 0, sizeof *oh);
- oh->length = htons(buffer->size);
-
+ update_openflow_length(buffer);
retval = rconn_send(rconn, buffer);
if (retval) {
VLOG_WARN("send to %s failed: %s",
struct ofp_switch_features *ofr;
struct sw_port *p;
- ofr = alloc_openflow_buffer(dp, sizeof *ofr, OFPT_FEATURES_REPLY,
- sender, &buffer);
+ ofr = make_openflow_reply(sizeof *ofr, OFPT_FEATURES_REPLY,
+ sender, &buffer);
ofr->datapath_id = htonll(dp->id);
ofr->n_exact = htonl(2 * TABLE_HASH_MAX_FLOWS);
ofr->n_compression = 0; /* Not supported */
void
dp_update_port_flags(struct datapath *dp, const struct ofp_phy_port *opp)
{
- struct sw_port *p;
-
- p = &dp->ports[htons(opp->port_no)];
+ int port_no = ntohs(opp->port_no);
+ if (port_no < OFPP_MAX) {
+ struct sw_port *p = &dp->ports[port_no];
- /* Make sure the port id hasn't changed since this was sent */
- if (!p || memcmp(opp->hw_addr, netdev_get_etheraddr(p->netdev),
- ETH_ADDR_LEN) != 0)
- return;
-
- p->flags = htonl(opp->flags);
+ /* Make sure the port id hasn't changed since this was sent */
+ if (!p || memcmp(opp->hw_addr, netdev_get_etheraddr(p->netdev),
+ ETH_ADDR_LEN) != 0) {
+ return;
+ }
+ p->flags = htonl(opp->flags);
+ }
}
static void
{
struct buffer *buffer;
struct ofp_port_status *ops;
- ops = alloc_openflow_buffer(p->dp, sizeof *ops, OFPT_PORT_STATUS, NULL,
- &buffer);
- ops->reason = status;
+ ops = make_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, 0, &buffer);
+ ops->reason = status;
+ memset(ops->pad, 0, sizeof ops->pad);
fill_port_desc(p->dp, p, &ops->desc);
+
send_openflow_buffer(p->dp, buffer, NULL);
}
void
-send_flow_expired(struct datapath *dp, struct sw_flow *flow)
+send_flow_expired(struct datapath *dp, struct sw_flow *flow,
+ enum ofp_flow_expired_reason reason)
{
struct buffer *buffer;
struct ofp_flow_expired *ofe;
- ofe = alloc_openflow_buffer(dp, sizeof *ofe, OFPT_FLOW_EXPIRED, NULL,
- &buffer);
+ ofe = make_openflow_xid(sizeof *ofe, OFPT_FLOW_EXPIRED, 0, &buffer);
flow_fill_match(&ofe->match, &flow->key);
- ofe->duration = htonl(flow->timeout - flow->max_idle - flow->created);
- ofe->packet_count = htonll(flow->packet_count);
- ofe->byte_count = htonll(flow->byte_count);
+
+ ofe->priority = htons(flow->priority);
+ ofe->reason = reason;
+ memset(ofe->pad, 0, sizeof ofe->pad);
+
+ ofe->duration = htonl(time_now() - flow->created);
+ memset(ofe->pad2, 0, sizeof ofe->pad2);
+ ofe->packet_count = htonll(flow->packet_count);
+ ofe->byte_count = htonll(flow->byte_count);
send_openflow_buffer(dp, buffer, NULL);
}
{
struct buffer *buffer;
struct ofp_error_msg *oem;
- oem = alloc_openflow_buffer(dp, sizeof(*oem)+len, OFPT_ERROR_MSG,
- sender, &buffer);
+ oem = make_openflow_reply(sizeof(*oem)+len, OFPT_ERROR_MSG,
+ sender, &buffer);
oem->type = htons(type);
oem->code = htons(code);
memcpy(oem->data, data, len);
}
static void
-fill_flow_stats(struct ofp_flow_stats *ofs, struct sw_flow *flow,
+fill_flow_stats(struct buffer *buffer, struct sw_flow *flow,
int table_idx, time_t now)
{
- ofs->match.wildcards = htons(flow->key.wildcards);
- ofs->match.in_port = flow->key.flow.in_port;
- memcpy(ofs->match.dl_src, flow->key.flow.dl_src, ETH_ADDR_LEN);
- memcpy(ofs->match.dl_dst, flow->key.flow.dl_dst, ETH_ADDR_LEN);
- ofs->match.dl_vlan = flow->key.flow.dl_vlan;
- ofs->match.dl_type = flow->key.flow.dl_type;
- ofs->match.nw_src = flow->key.flow.nw_src;
- ofs->match.nw_dst = flow->key.flow.nw_dst;
- ofs->match.nw_proto = flow->key.flow.nw_proto;
- memset(ofs->match.pad, 0, sizeof ofs->match.pad);
- ofs->match.tp_src = flow->key.flow.tp_src;
- ofs->match.tp_dst = flow->key.flow.tp_dst;
- ofs->duration = htonl(now - flow->created);
- ofs->priority = htons(flow->priority);
- ofs->table_id = table_idx;
- ofs->packet_count = htonll(flow->packet_count);
- ofs->byte_count = htonll(flow->byte_count);
+ struct ofp_flow_stats *ofs;
+ int length = sizeof *ofs + sizeof *ofs->actions * flow->n_actions;
+ ofs = buffer_put_uninit(buffer, length);
+ ofs->length = htons(length);
+ ofs->table_id = table_idx;
+ ofs->pad = 0;
+ ofs->match.wildcards = htons(flow->key.wildcards);
+ ofs->match.in_port = flow->key.flow.in_port;
+ memcpy(ofs->match.dl_src, flow->key.flow.dl_src, ETH_ADDR_LEN);
+ memcpy(ofs->match.dl_dst, flow->key.flow.dl_dst, ETH_ADDR_LEN);
+ ofs->match.dl_vlan = flow->key.flow.dl_vlan;
+ ofs->match.dl_type = flow->key.flow.dl_type;
+ ofs->match.nw_src = flow->key.flow.nw_src;
+ ofs->match.nw_dst = flow->key.flow.nw_dst;
+ ofs->match.nw_proto = flow->key.flow.nw_proto;
+ memset(ofs->match.pad, 0, sizeof ofs->match.pad);
+ ofs->match.tp_src = flow->key.flow.tp_src;
+ ofs->match.tp_dst = flow->key.flow.tp_dst;
+ ofs->duration = htonl(now - flow->created);
+ ofs->priority = htons(flow->priority);
+ ofs->idle_timeout = htons(flow->idle_timeout);
+ ofs->hard_timeout = htons(flow->hard_timeout);
+ memset(ofs->pad2, 0, sizeof ofs->pad2);
+ ofs->packet_count = htonll(flow->packet_count);
+ ofs->byte_count = htonll(flow->byte_count);
+ memcpy(ofs->actions, flow->actions,
+ sizeof *ofs->actions * flow->n_actions);
}
-int
-dp_send_flow_stats(struct datapath *dp, const struct sender *sender,
- const struct ofp_match *match)
-{
- struct buffer *buffer;
- struct ofp_flow_stats_reply *fsr;
- size_t header_size, fudge, flow_size;
- struct sw_flow_key match_key;
- int table_idx, n_flows, max_flows;
- time_t now;
-
- header_size = offsetof(struct ofp_flow_stats_reply, flows);
- fudge = 128;
- flow_size = sizeof fsr->flows[0];
- max_flows = (65536 - header_size - fudge) / flow_size;
- fsr = alloc_openflow_buffer(dp, header_size,
- OFPT_FLOW_STATS_REPLY, sender, &buffer);
-
- n_flows = 0;
- flow_extract_match(&match_key, match);
- now = time(0);
- for (table_idx = 0; table_idx < dp->chain->n_tables; table_idx++) {
- struct sw_table *table = dp->chain->tables[table_idx];
- struct swt_iterator iter;
-
- if (n_flows >= max_flows) {
- break;
- }
-
- if (!table->iterator(table, &iter)) {
- printf("iterator failed for table %d\n", table_idx);
- continue;
- }
-
- for (; iter.flow; table->iterator_next(&iter)) {
- if (flow_matches(&match_key, &iter.flow->key)) {
- struct ofp_flow_stats *ofs = buffer_put_uninit(buffer,
- sizeof *ofs);
- fill_flow_stats(ofs, iter.flow, table_idx, now);
- if (++n_flows >= max_flows) {
- break;
- }
- }
- }
- table->iterator_destroy(&iter);
- }
- return send_openflow_buffer(dp, buffer, sender);
-}
-
-int
-dp_send_port_stats(struct datapath *dp, const struct sender *sender)
-{
- struct buffer *buffer;
- struct ofp_port_stats_reply *psr;
- struct sw_port *p;
-
- psr = alloc_openflow_buffer(dp, offsetof(struct ofp_port_stats_reply,
- ports),
- OFPT_PORT_STATS_REPLY, sender, &buffer);
- LIST_FOR_EACH (p, struct sw_port, node, &dp->port_list) {
- struct ofp_port_stats *ps = buffer_put_uninit(buffer, sizeof *ps);
- ps->port_no = htons(port_no(dp, p));
- memset(ps->pad, 0, sizeof ps->pad);
- ps->rx_count = htonll(p->rx_count);
- ps->tx_count = htonll(p->tx_count);
- ps->drop_count = htonll(p->drop_count);
- }
- return send_openflow_buffer(dp, buffer, sender);
-}
-
-int
-dp_send_table_stats(struct datapath *dp, const struct sender *sender)
-{
- struct buffer *buffer;
- struct ofp_table_stats_reply *tsr;
- int i;
-
- tsr = alloc_openflow_buffer(dp, offsetof(struct ofp_table_stats_reply,
- tables),
- OFPT_TABLE_STATS_REPLY, sender, &buffer);
- for (i = 0; i < dp->chain->n_tables; i++) {
- struct ofp_table_stats *ots = buffer_put_uninit(buffer, sizeof *ots);
- struct sw_table_stats stats;
- dp->chain->tables[i]->stats(dp->chain->tables[i], &stats);
- strncpy(ots->name, stats.name, sizeof ots->name);
- ots->table_id = i;
- ots->pad[0] = ots->pad[1] = 0;
- ots->max_entries = htonl(stats.max_flows);
- ots->active_count = htonl(stats.n_flows);
- ots->matched_count = htonll(0); /* FIXME */
- }
- return send_openflow_buffer(dp, buffer, sender);
-}
\f
/* 'buffer' was received on 'in_port', a physical switch port between 0 and
- * OFPP_MAX. Process it according to 'chain'. */
-void fwd_port_input(struct datapath *dp, struct buffer *buffer, int in_port)
+ * OFPP_MAX. Process it according to 'dp''s flow table. Returns 0 if
+ * successful, in which case 'buffer' is destroyed, or -ESRCH if there is no
+ * matching flow, in which case 'buffer' still belongs to the caller. */
+int run_flow_through_tables(struct datapath *dp, struct buffer *buffer,
+ int in_port)
{
struct sw_flow_key key;
struct sw_flow *flow;
key.wildcards = 0;
- flow_extract(buffer, in_port, &key.flow);
+ if (flow_extract(buffer, in_port, &key.flow)
+ && (dp->flags & OFPC_FRAG_MASK) == OFPC_FRAG_DROP) {
+ /* Drop fragment. */
+ buffer_delete(buffer);
+ return 0;
+ }
+
flow = chain_lookup(dp->chain, &key);
if (flow != NULL) {
flow_used(flow, buffer);
execute_actions(dp, buffer, in_port, &key,
flow->actions, flow->n_actions);
+ return 0;
} else {
- dp_output_control(dp, buffer, in_port, ntohs(dp->config.miss_send_len),
+ return -ESRCH;
+ }
+}
+
+/* 'buffer' was received on 'in_port', a physical switch port between 0 and
+ * OFPP_MAX. Process it according to 'dp''s flow table, sending it up to the
+ * controller if no flow matches. Takes ownership of 'buffer'. */
+void fwd_port_input(struct datapath *dp, struct buffer *buffer, int in_port)
+{
+ if (run_flow_through_tables(dp, buffer, in_port)) {
+ dp_output_control(dp, buffer, in_port, dp->miss_send_len,
OFPR_NO_MATCH);
}
}
buffer_delete(buffer);
}
-/* Returns the new checksum for a packet in which the checksum field previously
- * contained 'old_csum' and in which a field that contained 'old_u16' was
- * changed to contain 'new_u16'. */
-static uint16_t
-recalc_csum16(uint16_t old_csum, uint16_t old_u16, uint16_t new_u16)
-{
- /* Ones-complement arithmetic is endian-independent, so this code does not
- * use htons() or ntohs().
- *
- * See RFC 1624 for formula and explanation. */
- uint16_t hc_complement = ~old_csum;
- uint16_t m_complement = ~old_u16;
- uint16_t m_prime = new_u16;
- uint32_t sum = hc_complement + m_complement + m_prime;
- uint16_t hc_prime_complement = sum + (sum >> 16);
- return ~hc_prime_complement;
-}
-
-/* Returns the new checksum for a packet in which the checksum field previously
- * contained 'old_csum' and in which a field that contained 'old_u32' was
- * changed to contain 'new_u32'. */
-static uint16_t
-recalc_csum32(uint16_t old_csum, uint32_t old_u32, uint32_t new_u32)
-{
- return recalc_csum16(recalc_csum16(old_csum, old_u32, new_u32),
- old_u32 >> 16, new_u32 >> 16);
-}
-
static void modify_nh(struct buffer *buffer, uint16_t eth_proto,
uint8_t nw_proto, const struct ofp_action *a)
{
uint16_t new_id = a->arg.vlan_id;
struct vlan_eth_header *veh;
- if (new_id != OFP_VLAN_NONE) {
+ if (new_id != htons(OFP_VLAN_NONE)) {
if (key->flow.dl_vlan != htons(OFP_VLAN_NONE)) {
/* Modify vlan id, but maintain other TCI values */
veh = buffer->l2;
veh->veth_tci &= ~htons(VLAN_VID);
- veh->veth_tci |= htons(new_id);
+ veh->veth_tci |= new_id;
} else {
/* Insert new vlan id. */
struct eth_header *eh = buffer->l2;
struct buffer *buffer;
struct ofp_switch_config *osc;
- osc = alloc_openflow_buffer(dp, sizeof *osc, OFPT_GET_CONFIG_REPLY,
- sender, &buffer);
+ osc = make_openflow_reply(sizeof *osc, OFPT_GET_CONFIG_REPLY,
+ sender, &buffer);
- assert(sizeof *osc == sizeof dp->config);
- memcpy(((char *)osc) + sizeof osc->header,
- ((char *)&dp->config) + sizeof dp->config.header,
- sizeof dp->config - sizeof dp->config.header);
+ osc->flags = htons(dp->flags);
+ osc->miss_send_len = htons(dp->miss_send_len);
return send_openflow_buffer(dp, buffer, sender);
}
const void *msg)
{
const struct ofp_switch_config *osc = msg;
- dp->config = *osc;
+ int flags;
+
+ flags = ntohs(osc->flags) & (OFPC_SEND_FLOW_EXP | OFPC_FRAG_MASK);
+ if ((flags & OFPC_FRAG_MASK) != OFPC_FRAG_NORMAL
+ && (flags & OFPC_FRAG_MASK) != OFPC_FRAG_DROP) {
+ flags = (flags & ~OFPC_FRAG_MASK) | OFPC_FRAG_DROP;
+ }
+ dp->flags = flags;
+ dp->miss_send_len = ntohs(osc->miss_send_len);
return 0;
}
struct sw_flow *flow;
- /* Check number of actions. */
- n_acts = (ntohs(ofm->header.length) - sizeof *ofm) / sizeof *ofm->actions;
- if (n_acts > MAX_ACTIONS) {
- error = -E2BIG;
- goto error;
- }
-
/* To prevent loops, make sure there's no action to send to the
* OFP_TABLE virtual port.
*/
+ n_acts = (ntohs(ofm->header.length) - sizeof *ofm) / sizeof *ofm->actions;
for (i=0; i<n_acts; i++) {
const struct ofp_action *a = &ofm->actions[i];
if (a->type == htons(OFPAT_OUTPUT)
- && a->arg.output.port == htons(OFPP_TABLE)) {
+ && (a->arg.output.port == htons(OFPP_TABLE)
+ || a->arg.output.port == htons(OFPP_NONE))) {
/* xxx Send fancy new error message? */
goto error;
}
/* Fill out flow. */
flow_extract_match(&flow->key, &ofm->match);
- flow->max_idle = ntohs(ofm->max_idle);
- flow->priority = ntohs(ofm->priority);
- flow->timeout = time(0) + flow->max_idle; /* FIXME */
+ flow->priority = flow->key.wildcards ? ntohs(ofm->priority) : -1;
+ flow->idle_timeout = ntohs(ofm->idle_timeout);
+ flow->hard_timeout = ntohs(ofm->hard_timeout);
+ flow->used = flow->created = time_now();
flow->n_actions = n_acts;
- flow->created = time(0); /* FIXME */
flow->byte_count = 0;
flow->packet_count = 0;
memcpy(flow->actions, ofm->actions, n_acts * sizeof *flow->actions);
return chain_delete(dp->chain, &key, 0, 0) ? 0 : -ESRCH;
} else if (command == OFPFC_DELETE_STRICT) {
struct sw_flow_key key;
+ uint16_t priority;
flow_extract_match(&key, &ofm->match);
- return chain_delete(dp->chain, &key,
- ntohs(ofm->priority), 1) ? 0 : -ESRCH;
+ priority = key.wildcards ? ntohs(ofm->priority) : -1;
+ return chain_delete(dp->chain, &key, priority, 1) ? 0 : -ESRCH;
} else {
return -ENODEV;
}
}
+struct flow_stats_state {
+ int table_idx;
+ struct sw_table_position position;
+ struct ofp_flow_stats_request rq;
+ time_t now;
+
+ struct buffer *buffer;
+};
+
+#define MAX_FLOW_STATS_BYTES 4096
+
+static int flow_stats_init(struct datapath *dp, const void *body, int body_len,
+ void **state)
+{
+ const struct ofp_flow_stats_request *fsr = body;
+ struct flow_stats_state *s = xmalloc(sizeof *s);
+ s->table_idx = fsr->table_id == 0xff ? 0 : fsr->table_id;
+ memset(&s->position, 0, sizeof s->position);
+ s->rq = *fsr;
+ *state = s;
+ return 0;
+}
+
+static int flow_stats_dump_callback(struct sw_flow *flow, void *private)
+{
+ struct flow_stats_state *s = private;
+ fill_flow_stats(s->buffer, flow, s->table_idx, s->now);
+ return s->buffer->size >= MAX_FLOW_STATS_BYTES;
+}
+
+static int flow_stats_dump(struct datapath *dp, void *state,
+ struct buffer *buffer)
+{
+ struct flow_stats_state *s = state;
+ struct sw_flow_key match_key;
+
+ flow_extract_match(&match_key, &s->rq.match);
+ s->buffer = buffer;
+ s->now = time_now();
+ while (s->table_idx < dp->chain->n_tables
+ && (s->rq.table_id == 0xff || s->rq.table_id == s->table_idx))
+ {
+ struct sw_table *table = dp->chain->tables[s->table_idx];
+
+ if (table->iterate(table, &match_key, &s->position,
+ flow_stats_dump_callback, s))
+ break;
+
+ s->table_idx++;
+ memset(&s->position, 0, sizeof s->position);
+ }
+ return s->buffer->size >= MAX_FLOW_STATS_BYTES;
+}
+
+static void flow_stats_done(void *state)
+{
+ free(state);
+}
+
+struct aggregate_stats_state {
+ struct ofp_aggregate_stats_request rq;
+};
+
+static int aggregate_stats_init(struct datapath *dp,
+ const void *body, int body_len,
+ void **state)
+{
+ const struct ofp_aggregate_stats_request *rq = body;
+ struct aggregate_stats_state *s = xmalloc(sizeof *s);
+ s->rq = *rq;
+ *state = s;
+ return 0;
+}
+
+static int aggregate_stats_dump_callback(struct sw_flow *flow, void *private)
+{
+ struct ofp_aggregate_stats_reply *rpy = private;
+ rpy->packet_count += flow->packet_count;
+ rpy->byte_count += flow->byte_count;
+ rpy->flow_count++;
+ return 0;
+}
+
+static int aggregate_stats_dump(struct datapath *dp, void *state,
+ struct buffer *buffer)
+{
+ struct aggregate_stats_state *s = state;
+ struct ofp_aggregate_stats_request *rq = &s->rq;
+ struct ofp_aggregate_stats_reply *rpy;
+ struct sw_table_position position;
+ struct sw_flow_key match_key;
+ int table_idx;
+
+ rpy = buffer_put_uninit(buffer, sizeof *rpy);
+ memset(rpy, 0, sizeof *rpy);
+
+ flow_extract_match(&match_key, &rq->match);
+ table_idx = rq->table_id == 0xff ? 0 : rq->table_id;
+ memset(&position, 0, sizeof position);
+ while (table_idx < dp->chain->n_tables
+ && (rq->table_id == 0xff || rq->table_id == table_idx))
+ {
+ struct sw_table *table = dp->chain->tables[table_idx];
+ int error;
+
+ error = table->iterate(table, &match_key, &position,
+ aggregate_stats_dump_callback, rpy);
+ if (error)
+ return error;
+
+ table_idx++;
+ memset(&position, 0, sizeof position);
+ }
+
+ rpy->packet_count = htonll(rpy->packet_count);
+ rpy->byte_count = htonll(rpy->byte_count);
+ rpy->flow_count = htonl(rpy->flow_count);
+ return 0;
+}
+
+static void aggregate_stats_done(void *state)
+{
+ free(state);
+}
+
+static int table_stats_dump(struct datapath *dp, void *state,
+ struct buffer *buffer)
+{
+ int i;
+ for (i = 0; i < dp->chain->n_tables; i++) {
+ struct ofp_table_stats *ots = buffer_put_uninit(buffer, sizeof *ots);
+ struct sw_table_stats stats;
+ dp->chain->tables[i]->stats(dp->chain->tables[i], &stats);
+ strncpy(ots->name, stats.name, sizeof ots->name);
+ ots->table_id = i;
+ memset(ots->pad, 0, sizeof ots->pad);
+ ots->max_entries = htonl(stats.max_flows);
+ ots->active_count = htonl(stats.n_flows);
+ ots->matched_count = htonll(stats.n_matched);
+ }
+ return 0;
+}
+
+struct port_stats_state {
+ int port;
+};
+
+static int port_stats_init(struct datapath *dp, const void *body, int body_len,
+ void **state)
+{
+ struct port_stats_state *s = xmalloc(sizeof *s);
+ s->port = 0;
+ *state = s;
+ return 0;
+}
+
+static int port_stats_dump(struct datapath *dp, void *state,
+ struct buffer *buffer)
+{
+ struct port_stats_state *s = state;
+ int i;
+
+ for (i = s->port; i < OFPP_MAX; i++) {
+ struct sw_port *p = &dp->ports[i];
+ struct ofp_port_stats *ops;
+ if (!p->netdev) {
+ continue;
+ }
+ ops = buffer_put_uninit(buffer, sizeof *ops);
+ ops->port_no = htons(port_no(dp, p));
+ memset(ops->pad, 0, sizeof ops->pad);
+ ops->rx_count = htonll(p->rx_count);
+ ops->tx_count = htonll(p->tx_count);
+ ops->drop_count = htonll(p->drop_count);
+ ops++;
+ }
+ s->port = i;
+ return 0;
+}
+
+static void port_stats_done(void *state)
+{
+ free(state);
+}
+
+struct stats_type {
+ /* Minimum and maximum acceptable number of bytes in body member of
+ * struct ofp_stats_request. */
+ size_t min_body, max_body;
+
+ /* Prepares to dump some kind of statistics on 'dp'. 'body' and
+ * 'body_len' are the 'body' member of the struct ofp_stats_request.
+ * Returns zero if successful, otherwise a negative error code.
+ * May initialize '*state' to state information. May be null if no
+ * initialization is required.*/
+ int (*init)(struct datapath *dp, const void *body, int body_len,
+ void **state);
+
+ /* Appends statistics for 'dp' to 'buffer', which initially contains a
+ * struct ofp_stats_reply. On success, it should return 1 if it should be
+ * called again later with another buffer, 0 if it is done, or a negative
+ * errno value on failure. */
+ int (*dump)(struct datapath *dp, void *state, struct buffer *buffer);
+
+ /* Cleans any state created by the init or dump functions. May be null
+ * if no cleanup is required. */
+ void (*done)(void *state);
+};
+
+static const struct stats_type stats[] = {
+ [OFPST_FLOW] = {
+ sizeof(struct ofp_flow_stats_request),
+ sizeof(struct ofp_flow_stats_request),
+ flow_stats_init,
+ flow_stats_dump,
+ flow_stats_done
+ },
+ [OFPST_AGGREGATE] = {
+ sizeof(struct ofp_aggregate_stats_request),
+ sizeof(struct ofp_aggregate_stats_request),
+ aggregate_stats_init,
+ aggregate_stats_dump,
+ aggregate_stats_done
+ },
+ [OFPST_TABLE] = {
+ 0,
+ 0,
+ NULL,
+ table_stats_dump,
+ NULL
+ },
+ [OFPST_PORT] = {
+ 0,
+ 0,
+ port_stats_init,
+ port_stats_dump,
+ port_stats_done
+ },
+};
+
+struct stats_dump_cb {
+ bool done;
+ struct ofp_stats_request *rq;
+ struct sender sender;
+ const struct stats_type *s;
+ void *state;
+};
+
+static int
+stats_dump(struct datapath *dp, void *cb_)
+{
+ struct stats_dump_cb *cb = cb_;
+ struct ofp_stats_reply *osr;
+ struct buffer *buffer;
+ int err;
+
+ if (cb->done) {
+ return 0;
+ }
+
+ osr = make_openflow_reply(sizeof *osr, OFPT_STATS_REPLY, &cb->sender,
+ &buffer);
+ osr->type = htons(cb->s - stats);
+ osr->flags = 0;
+
+ err = cb->s->dump(dp, cb->state, buffer);
+ if (err >= 0) {
+ int err2;
+ if (!err) {
+ cb->done = true;
+ } else {
+ /* Buffer might have been reallocated, so find our data again. */
+ osr = buffer_at_assert(buffer, 0, sizeof *osr);
+ osr->flags = ntohs(OFPSF_REPLY_MORE);
+ }
+ err2 = send_openflow_buffer(dp, buffer, &cb->sender);
+ if (err2) {
+ err = err2;
+ }
+ }
+
+ return err;
+}
+
+static void
+stats_done(void *cb_)
+{
+ struct stats_dump_cb *cb = cb_;
+ if (cb) {
+ if (cb->s->done) {
+ cb->s->done(cb->state);
+ }
+ free(cb);
+ }
+}
+
static int
-recv_flow_stats_request(struct datapath *dp, const struct sender *sender,
- const void *msg)
+recv_stats_request(struct datapath *dp, const struct sender *sender,
+ const void *oh)
{
- const struct ofp_flow_stats_request *fsr = msg;
- if (fsr->type == OFPFS_INDIV) {
- return dp_send_flow_stats(dp, sender, &fsr->match);
- } else {
- /* FIXME */
- return -ENOSYS;
- }
+ const struct ofp_stats_request *rq = oh;
+ size_t rq_len = ntohs(rq->header.length);
+ struct stats_dump_cb *cb;
+ int type, body_len;
+ int err;
+
+ type = ntohs(rq->type);
+ if (type >= ARRAY_SIZE(stats) || !stats[type].dump) {
+ VLOG_WARN("received stats request of unknown type %d", type);
+ return -EINVAL;
+ }
+
+ cb = xmalloc(sizeof *cb);
+ cb->done = false;
+ cb->rq = xmemdup(rq, rq_len);
+ cb->sender = *sender;
+ cb->s = &stats[type];
+ cb->state = NULL;
+
+ body_len = rq_len - offsetof(struct ofp_stats_request, body);
+ if (body_len < cb->s->min_body || body_len > cb->s->max_body) {
+ VLOG_WARN("stats request type %d with bad body length %d",
+ type, body_len);
+ err = -EINVAL;
+ goto error;
+ }
+
+ if (cb->s->init) {
+ err = cb->s->init(dp, rq->body, body_len, &cb->state);
+ if (err) {
+ VLOG_WARN("failed initialization of stats request type %d: %s",
+ type, strerror(-err));
+ goto error;
+ }
+ }
+
+ remote_start_dump(sender->remote, stats_dump, stats_done, cb);
+ return 0;
+
+error:
+ free(cb->rq);
+ free(cb);
+ return err;
}
static int
-recv_port_stats_request(struct datapath *dp, const struct sender *sender,
- const void *msg)
+recv_echo_request(struct datapath *dp, const struct sender *sender,
+ const void *oh)
{
- return dp_send_port_stats(dp, sender);
+ return send_openflow_buffer(dp, make_echo_reply(oh), sender);
}
static int
-recv_table_stats_request(struct datapath *dp, const struct sender *sender,
- const void *msg)
+recv_echo_reply(struct datapath *dp UNUSED, const struct sender *sender UNUSED,
+ const void *oh UNUSED)
{
- return dp_send_table_stats(dp, sender);
+ return 0;
}
/* 'msg', which is 'length' bytes long, was received from the control path.
sizeof (struct ofp_port_mod),
recv_port_mod,
},
- [OFPT_FLOW_STATS_REQUEST] = {
- sizeof (struct ofp_flow_stats_request),
- recv_flow_stats_request,
- },
- [OFPT_PORT_STATS_REQUEST] = {
- sizeof (struct ofp_port_stats_request),
- recv_port_stats_request,
- },
- [OFPT_TABLE_STATS_REQUEST] = {
- sizeof (struct ofp_table_stats_request),
- recv_table_stats_request,
- },
+ [OFPT_STATS_REQUEST] = {
+ sizeof (struct ofp_stats_request),
+ recv_stats_request,
+ },
+ [OFPT_ECHO_REQUEST] = {
+ sizeof (struct ofp_header),
+ recv_echo_request,
+ },
+ [OFPT_ECHO_REPLY] = {
+ sizeof (struct ofp_header),
+ recv_echo_reply,
+ },
};
const struct openflow_packet *pkt;
struct ofp_header *oh;
oh = (struct ofp_header *) msg;
- if (oh->version != OFP_VERSION || oh->type >= ARRAY_SIZE(packets)
- || ntohs(oh->length) > length)
+ assert(oh->version == OFP_VERSION);
+ if (oh->type >= ARRAY_SIZE(packets) || ntohs(oh->length) > length)
return -EINVAL;
pkt = &packets[oh->type];
if (p->buffer) {
/* Don't buffer packet if existing entry is less than
* OVERWRITE_SECS old. */
- if (time(0) < p->timeout) { /* FIXME */
+ if (time_now() < p->timeout) { /* FIXME */
return -1;
} else {
buffer_delete(p->buffer);
if (++p->cookie >= (1u << PKT_COOKIE_BITS) - 1)
p->cookie = 0;
p->buffer = buffer_clone(buffer); /* FIXME */
- p->timeout = time(0) + OVERWRITE_SECS; /* FIXME */
+ p->timeout = time_now() + OVERWRITE_SECS; /* FIXME */
id = buffer_idx | (p->cookie << PKT_BUFFER_BITS);
return id;
git://git.onelab.eu / sliver-openvswitch.git / blobdiff