/*
* Delete single flow or all flows.
*
* When request->key is empty delete all flows
*/
static void
flow_cmd_del(struct dpdk_flow_message *request)
{
struct dpdk_message reply = {0};
struct flow_key empty = {0};
int pos = 0;
if (!memcmp(&request->key, &empty, sizeof(request->key))) {
flow_table_del_all();
reply.type = 0;
} else {
pos = flow_table_lookup(&request->key);
if (pos < 0) {
reply.type = ENOENT;
} else {
/* Retrieve flow stats*/
flow_table_get_flow(&request->key,
NULL, &request->stats);
flow_table_del_flow(&request->key);
reply.type = 0;
}
}
reply.flow_msg = *request;
send_reply_to_vswitchd(&reply);
}
/*
* Add or modify flow table entry.
*
* When modifying, the stats can be optionally cleared
*/
static void
flow_cmd_new(struct dpdk_flow_message *request)
{
struct dpdk_message reply = {0};
int pos = 0;
pos = flow_table_lookup(&request->key);
if (pos < 0) {
if (request->flags & FLAG_CREATE) {
flow_table_add_flow(&request->key, request->actions);
reply.type = 0;
} else {
reply.type = ENOENT;
}
} else {
if (request->flags & FLAG_REPLACE) {
/* Retrieve flow stats*/
flow_table_get_flow(&request->key,
NULL, &request->stats);
/* Depending on the value of request->clear we will
* either update or keep the same stats
*/
flow_table_mod_flow(&request->key,
request->actions, request->clear);
reply.type = 0;
} else {
reply.type = EEXIST;
}
}
reply.flow_msg = *request;
send_reply_to_vswitchd(&reply);
}
void
pipeline_process_packet(struct pipeline *pl, struct packet *pkt) {
struct flow_table *table, *next_table;
if (VLOG_IS_DBG_ENABLED(LOG_MODULE)) {
char *pkt_str = packet_to_string(pkt);
VLOG_DBG_RL(LOG_MODULE, &rl, "processing packet: %s", pkt_str);
free(pkt_str);
}
if (!packet_handle_std_is_ttl_valid(pkt->handle_std)) {
if ((pl->dp->config.flags & OFPC_INVALID_TTL_TO_CONTROLLER) != 0) {
VLOG_DBG_RL(LOG_MODULE, &rl, "Packet has invalid TTL, sending to controller.");
send_packet_to_controller(pl, pkt, 0/*table_id*/, OFPR_INVALID_TTL);
} else {
VLOG_DBG_RL(LOG_MODULE, &rl, "Packet has invalid TTL, dropping.");
}
packet_destroy(pkt);
return;
}
next_table = pl->tables[0];
while (next_table != NULL) {
struct flow_entry *entry;
VLOG_DBG_RL(LOG_MODULE, &rl, "trying table %u.", next_table->stats->table_id);
pkt->table_id = next_table->stats->table_id;
table = next_table;
next_table = NULL;
entry = flow_table_lookup(table, pkt);
if (entry != NULL) {
if (VLOG_IS_DBG_ENABLED(LOG_MODULE)) {
char *m = ofl_structs_flow_stats_to_string(entry->stats, pkt->dp->exp);
VLOG_DBG_RL(LOG_MODULE, &rl, "found matching entry: %s.", m);
free(m);
}
execute_entry(pl, entry, &next_table, &pkt);
/* Packet could be destroyed by a meter instruction */
if (!pkt)
return;
if (next_table == NULL) {
/* Cookie field is set 0xffffffffffffffff
because we cannot associate it to any
particular flow */
action_set_execute(pkt->action_set, pkt, 0xffffffffffffffff);
packet_destroy(pkt);
return;
}
} else {
/* OpenFlow 1.3 default behavior on a table miss */
VLOG_DBG_RL(LOG_MODULE, &rl, "No matching entry found. Dropping packet.");
packet_destroy(pkt);
return;
}
}
VLOG_WARN_RL(LOG_MODULE, &rl, "Reached outside of pipeline processing cycle.");
}
