/* Attempts to receive a packet from 'rc'. If successful, returns the packet;
* otherwise, returns a null pointer. The caller is responsible for freeing
* the packet (with ofpbuf_delete()). */
struct rfpbuf *
rconn_recv(struct rconn *rc)
{
if (rc->state & (S_ACTIVE | S_IDLE)) {
struct rfpbuf *buffer;
int error = vconn_recv(rc->vconn, &buffer);
if (!error) {
if (rc->state == S_IDLE) {
state_transition(rc, S_ACTIVE);
}
return buffer;
}
else if (error != EAGAIN)
{
if(error == ECONNRESET)
{
printf("The connection has been closed\n");
rconn_disconnect(rc);
return NULL;
}
else
{
printf("An error has occured\n");
rconn_disconnect(rc);
}
}
}
return NULL;
}
int main(void)
{
int i = 0;
int k = 0;
int status = 0;
int tape[N] = {0,0,1,1,0,0,1,1,1,0,0};
while(status != 5){
state_transition(&status,tape,&i);
printf("<step%d>\n", i-1);
if(status < 5){
printf("state:q_%d\n", status);
}else{
printf("state:q_H\n");
}
print_array(tape);
k++;
}
return 0;
}
/* Drops any existing connection on 'rc', then configures 'rc' to use
* 'vconn'. If the connection on 'vconn' drops, 'rc' will not reconnect on it
* own.
*
* By default, the target obtained from vconn_get_name(vconn) is used in log
* messages. If 'name' is nonnull, then it is used instead. It should
* presumably give more information to a human reader than the target, but it
* need not be acceptable to vconn_open(). */
void rconn_connect_unreliably(struct rconn *rc, struct vconn *vconn, const char *name)
{
assert(vconn != NULL);
rconn_disconnect(rc);
rconn_set_target__(rc, vconn_get_name(vconn));
// rc->reliable = false;
rc->vconn = vconn;
// rc->last_connected = time_now();
state_transition(rc, S_ACTIVE);
}
void
rconn_disconnect(struct rconn *rc)
{
if (rc->state != S_VOID) {
if (rc->vconn) {
vconn_close(rc->vconn);
rc->vconn = NULL;
}
rconn_set_target__(rc, "void");
state_transition(rc, S_VOID);
}
}
void
rconn_connect_unreliably(struct rconn *rc,
const char *name, struct vconn *vconn)
{
assert(vconn != NULL);
rconn_disconnect(rc);
free(rc->name);
rc->name = xstrdup(name);
rc->reliable = false;
rc->vconn = vconn;
rc->last_connected = time_now();
state_transition(rc, S_ACTIVE);
}
static void
run_CONNECTING(struct rconn *rc)
{
int retval = vconn_connect(rc->vconn);
if (!retval) {
printf("%s: connected", rc->target);
state_transition(rc, S_ACTIVE);
} else if (retval != EAGAIN) {
printf("%s: connection failed (%s)",
rc->target, strerror(retval));
rconn_disconnect(rc);
}
}
void
rconn_disconnect(struct rconn *rc)
{
if (rc->state != S_VOID) {
if (rc->vconn) {
vconn_close(rc->vconn);
rc->vconn = NULL;
}
rconn_set_target__(rc, "void", NULL);
rc->reliable = false;
rc->backoff = 0;
rc->backoff_deadline = TIME_MIN;
state_transition(rc, S_VOID);
}
}
void
rconn_disconnect(struct rconn *rc)
{
if (rc->state != S_VOID) {
if (rc->vconn) {
vconn_close(rc->vconn);
rc->vconn = NULL;
}
free(rc->name);
rc->name = xstrdup("void");
rc->reliable = false;
rc->backoff = 0;
rc->backoff_deadline = TIME_MIN;
state_transition(rc, S_VOID);
}
}
static void
reconnect(struct rconn *rc)
{
int retval;
retval = vconn_open(rc->target, RFP10_VERSION, &rc->vconn, DSCP_DEFAULT);
if (!retval) {
// rc->remote_ip = vconn_get_remote_ip(rc->vconn);
// rc->local_ip = vconn_get_local_ip(rc->vconn);
// rc->remote_port = vconn_get_remote_port(rc->vconn);
state_transition(rc, S_CONNECTING);
}
else
{
printf("%s: connection failed (%s)", rc->target, strerror(retval));
rconn_disconnect(rc);
}
}
void
error_recoverable_error (void)
{
error_broadcast_error_code (err_sev_recoverable, error_code);
state_transition (state_idle);
}
