static void
remote_rconn_run(struct datapath *dp, struct remote *r, uint8_t conn_id) {
struct rconn *rconn;
ofl_err error;
size_t i;
if (conn_id == MAIN_CONNECTION)
rconn = r->rconn;
else if (conn_id == PTIN_CONNECTION)
rconn = r->rconn_aux;
rconn_run(rconn);
/* Do some remote processing, but cap it at a reasonable amount so that
* other processing doesn't starve. */
for (i = 0; i < 50; i++) {
if (!r->cb_dump) {
struct ofpbuf *buffer;
buffer = rconn_recv(rconn);
if (buffer == NULL) {
break;
} else {
struct ofl_msg_header *msg;
struct sender sender = {.remote = r, .conn_id = conn_id};
error = ofl_msg_unpack(buffer->data, buffer->size, &msg, &(sender.xid), dp->exp);
if (!error) {
error = handle_control_msg(dp, msg, &sender);
if (error) {
ofl_msg_free(msg, dp->exp);
}
}
if (error) {
struct ofl_msg_error err =
{{.type = OFPT_ERROR},
.type = ofl_error_type(error),
.code = ofl_error_code(error),
.data_length = buffer->size,
.data = buffer->data};
dp_send_message(dp, (struct ofl_msg_header *)&err, &sender);
}
ofpbuf_delete(buffer);
}
} else {
if (r->n_txq < TXQ_LIMIT) {
/* Handles barrier request messages. */
static ofl_err
handle_control_barrier_request(struct datapath *dp,
struct ofl_msg_header *msg, const struct sender *sender) {
/* Note: the implementation is single-threaded,
so a barrier request can simply be replied. */
struct ofl_msg_header reply =
{.type = OFPT_BARRIER_REPLY};
dp_send_message(dp, (struct ofl_msg_header *)&reply, sender);
ofl_msg_free(msg, dp->exp);
return 0;
}
int main(int argc, char **argv)
{
uint8_t *buf ,*buf0;
size_t buf_len = 0;
ofl_err err;
struct ofl_msg_header *msg = NULL;
uint32_t xid;
FILE *msg_file;
struct ofp_header *oh;
if (argc < 2) {
fprintf(stderr, "Expecting msg file.\n");
return 1;
}
time_init();
vlog_init();
vlog_set_verbosity(NULL);
msg_file = fopen(argv[1], "r");
if (msg_file == NULL) {
fprintf(stderr, "Cannot open msg file.\n");
return 1;
}
buf_len = read_all(msg_file, &buf);
buf0 = buf;
while (buf_len > 0) {
oh = (struct ofp_header *)buf;
err = ofl_msg_unpack(buf, ntohs(oh->length), &msg, &xid, NULL);
if (err == 0) {
//printf("Success!\n");
ofl_msg_print(stdout, msg, NULL);
printf("\n\n");
ofl_msg_free(msg, NULL);
} else {
free(buf);
printf("Failed :-( error type: %d code %d\n", ofl_error_type(err), ofl_error_code(err));
return 1;
}
buf_len -= ntohs(oh->length);
buf += ntohs(oh->length);
}
free(buf0);
return 0;
}
ofl_err
pipeline_handle_table_mod(struct pipeline *pl,
struct ofl_msg_table_mod *msg,
const struct sender *sender) {
if(sender->remote->role == OFPCR_ROLE_SLAVE)
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_IS_SLAVE);
if (msg->table_id == 0xff) {
size_t i;
for (i=0; i<PIPELINE_TABLES; i++) {
pl->tables[i]->features->config = msg->config;
}
} else {
pl->tables[msg->table_id]->features->config = msg->config;
}
ofl_msg_free((struct ofl_msg_header *)msg, pl->dp->exp);
return 0;
}
/* Sends OpenFlow messages received from other threads via the appropriate functions.
* Primarily used by DP to send messages to the controllers. */
static bool process_msg(void *ctrl_loop_, struct list_node *msg_) {
struct ctrl_loop *ctrl_loop = (struct ctrl_loop *)ctrl_loop_;
struct ctrl_msg *msg = (struct ctrl_msg *)msg_;
if (msg->conn_id == CTRL_CONN_ALL) {
size_t i;
for (i=1; i<ctrl_loop->conns_num; i++) {
ctrl_conn_send_msg(ctrl_loop->conns[i], msg->xid, msg->msg);
}
} else {
if (ctrl_loop->conns[msg->conn_id] != NULL) {
ctrl_conn_send_msg(ctrl_loop->conns[msg->conn_id], msg->xid, msg->msg);
} else {
logger_log(ctrl_loop->logger, LOG_WARN, "Request for message on non-existing connection.");
}
}
ofl_msg_free(msg->msg, OFL_NO_EXP, NULL/*errbuf*/);
free(msg);
return true;
}
/* Commit operation. */
static ofl_err
bundle_commit(struct datapath *dp,
struct bundle_table *table,
uint32_t bundle_id,
uint16_t flags,
const struct sender *sender) {
struct bundle_table_entry *entry;
struct bundle_message *bundle_msg;
struct ofl_msg_header *msg;
uint32_t xid;
ofl_err error;
ofl_err last_error = ofl_error(OFPET_BUNDLE_FAILED, OFPBFC_BAD_ID);
/* Find and process commit operation for bundle ID */
entry = bundle_table_entry_find(table, bundle_id);
if (entry != NULL) {
/* Ensure flags are consistent with flags specified previously */
if (entry->flags != flags) {
last_error = ofl_error(OFPET_BUNDLE_FAILED, OFPBFC_BAD_FLAGS);
} else {
/* Save state in case failure occurs */
last_error = 0;
dp_save_state(dp);
/* Commit all messages in bundle, stopping at first error */
LIST_FOR_EACH (bundle_msg, struct bundle_message, node, &entry->bundle_message_list) {
VLOG_DBG_RL(LOG_MODULE, &rl, "Commit of message with type %u and length %u\n",
bundle_msg->message->type,
ntohs(bundle_msg->message->length));
error = ofl_msg_unpack((uint8_t *)bundle_msg->message,
ntohs(bundle_msg->message->length),
&msg, &xid, dp->exp);
if (!error) {
/* This prototype only properly supports bundling of
* messages that do not generate replies (other than
* error replies). TODO: keep replies in a holding
* area and only release them to the controller when
* the commit succeeds. */
error = handle_control_msg(dp, msg, sender);
if (error) {
ofl_msg_free(msg, dp->exp);
}
}
if (error) {
last_error = error;
break;
}
}
/* Restore state if failures occurred */
if (last_error) {
dp_restore_state(dp);
} else {
/* TODO free memory used to save state without restoring
* (not required currently as variables used to save/restore
* state are re-used) */
}
/* We need to generate the error ourselves. The spec say that
* the error need to refer to the offending message in the budle.
* If we just return the error code, the error message would refer
* to the commit message. */
if (last_error) {
struct sender orig_sender = {.remote = sender->remote,
.conn_id = sender->conn_id,
.xid = xid};
struct ofl_msg_error orig_err =
{{.type = OFPT_ERROR},
.type = ofl_error_type(last_error),
.code = ofl_error_code(last_error),
.data_length = ntohs(bundle_msg->message->length),
.data = (uint8_t *)bundle_msg->message};
dp_send_message(dp, (struct ofl_msg_header *)&orig_err, &orig_sender);
/* Trigger second error message. */
last_error = ofl_error(OFPET_BUNDLE_FAILED, OFPBFC_MSG_FAILED);
}
}
/* Whether or not commit succeeded: free entry for bundle ID */
bundle_table_entry_destroy(entry);
}
return last_error;
}