class <Agent/TCP/Vegas> VegasTcpAgent : public virtual TcpAgent

TCP vegas (VegasTcpAgent)

Inheritance:


Public Methods

virtual void recv(Packet *pkt, Handler *)
virtual void timeout(int tno)
VegasTcpAgent()

Protected Fields

double firstrecv_
time recv the 1st ack
int ns_vegas_fix_level_
see comment at end of tcp-vegas.cc for details of fixes
double t_cwnd_changed_
last time cwnd changed
double v_actual_
actual send rate (pkt/s; needed for tcp-rbp)
int v_alpha_
vegas thruput thresholds in pkts
double v_baseRTT_
min of all rtt
int v_begseq_
tagged pkt seqno
double v_begtime_
tagged pkt sent
int v_beta_
int v_cntRTT_
of rtt measured within one rtt
int v_gamma_
threshold to change from slow-start to
int v_inc_flag_
if cwnd is allowed to incr for this rtt
double v_incr_
amount cwnd is increased in the next rtt
int v_maxwnd_
maxwnd size for v_sendtime_[]
double v_newcwnd_
record un-inflated cwnd
double v_rtt_
double v_sa_
double v_sd_
double* v_sendtime_
each unacked pkt's sendtime is recorded.
int v_slowstart_
of pkts to send after slow-start, deflt(2)
double v_sumRTT_
sum of rtt measured within one rtt
double v_timeout_
based on fine-grained timer
int* v_transmits_
of retx for an unacked pkt
int v_worried_
of pkts to chk after dup ack (1 or 2)

Protected Methods

virtual int delay_bind_dispatch(const char *varName, const char *localName, TclObject *tracer)
virtual void delay_bind_init_all()
virtual void output(int seqno, int reason = 0)
virtual void recv_newack_helper(Packet*)
void reset()
int vegas_expire(Packet*)
void vegas_inflate_cwnd(int win, double current_time)
double vegastime()

Inherited from TcpAgent:

Public Methods

virtual void advanceby(int delta)
int command(int argc, const char*const* argv)
Agent/TCP instproc done {}
virtual void sendmsg(int nbytes, const char *flags = 0)
Agent/TCP instproc source type
virtual void timeout_nonrtx(int tno)
void trace(TracedVar* v)

Protected Fields

double awnd_
int Backoffs
double base_cwnd_
double boot_time_
int bug_fix_
BurstSndTimer burstsnd_timer_
int closed_
int cong_action_
int control_increase_
int count_
TracedInt curseq_
TracedDouble cwnd_
double decrease_num_
int delay_growth_
DelSndTimer delsnd_timer_
TracedInt dupacks_
int ecn_
int ecn_backoff_
int ecn_burst_
int ect_
int eln_
int eln_last_rxmit_
int eln_rxmit_thresh_
int EnblRTTCtr_
int F_counting
int F_full
double fcnt_
int first_decrease_
double firstsent_
TracedInt highest_ack_
double increase_num_
int last_ack_
int last_cwnd_action_
int maxburst_
int maxcwnd_
double maxrto_
TracedInt maxseq_
TracedInt nackpack_
int nam_tracevar_
TracedInt ndatabytes_
TracedInt ndatapack_
TracedInt nrexmit_
TracedInt nrexmitbytes_
TracedInt nrexmitpack_
int off_tcp_
int old_ecn_
double overhead_
FILE* plotfile_
int prev_highest_ack_
int QOption_
int recover_
int restart_bugfix_
int rtt_active_
int RTT_count
int RTT_goodcount
int RTT_prev
int rtt_seq_
double rtt_ts_
int rttvar_exp_
int rttvar_init_
RtxTimer rtx_timer_
double rtxcur_init_
TracedInt singledup_
int slow_start_restart_
int srtt_init_
TracedInt ssthresh_
int syn_
TracedInt t_backoff_
int T_full
int T_last
int T_prev
TracedInt t_rtt_
TracedInt t_rttvar_
int T_RTTVAR_BITS
double t_rtxcur_
TracedInt t_seqno_
TracedInt t_srtt_
int T_SRTT_BITS
int T_start
double tcp_tick_
int tcpip_base_hdr_size_
int trace_all_oneline_
int ts_option_
double ts_peer_
int W_timed
int W_used
double wnd_
double wnd_const_
double wnd_init_
int wnd_init_option_
int wnd_option_
double wnd_restart_
double wnd_th_

Protected Methods

virtual void cancel_rtx_timer()
virtual void cancel_timers()
void closecwnd(int how)
virtual void dupack_action()
void ecn(int seqno)
void finish()
double initial_window()
void newack(Packet*)
virtual void newtimer(Packet*)
void opencwnd()
virtual void output_helper(Packet*)
virtual void partialnewack_helper(Packet*)
void print_if_needed(double memb_time)
void process_qoption_after_ack(int seqno)
void process_qoption_after_send()
void quench(int how)
virtual void recv_helper(Packet*)
void reset_qoption()
void reset_rtx_timer(int mild, int backoff = 1)
virtual void rtt_backoff()
void rtt_counting()
virtual void rtt_init()
virtual double rtt_timeout()
virtual void rtt_update(double tao)
virtual void send_helper(int)
virtual void send_idle_helper()
virtual void send_much(int force, int reason, int maxburst = 0)
virtual void send_one()
virtual void set_initial_window()
virtual void set_rtx_timer()
void slowdown(int how)
void tcp_eln(Packet *pkt)
void traceAll()
virtual void traceVar(TracedVar* v)
virtual int window()

Protected

#define T_RTT_BITS

Inherited from Agent:

Public Fields

Agent instvar agent_port_
Agent instvar dst_addr_
Agent instvar dst_port_
Agent instvar namTrace_
Agent instvar tg_

Public Methods

inline nsaddr_t& addr()
Agent instproc attach-app {s_type}
Agent instproc attach-source {s_type}
Agent instproc attach-tbf { tbf }
Agent instproc attach-trace { file }
virtual void attachApp(Application* app)
virtual void close()
Agent instproc connect d
virtual void connect(nsaddr_t dst)
inline nsaddr_t& daddr()
inline nsaddr_t& dport()
Agent instproc dst-port {}
Agent instproc init args
virtual void listen()
inline nsaddr_t& port()
Agent instproc port {}
virtual void send(int nbytes)
void send(Packet* p, Handler* h)
virtual void send(int sz, AppData *data)
virtual void sendto(int sz, AppData*, const char* flags = 0)
virtual void sendto(int nbytes, const char* flags, nsaddr_t dst)
Agent instproc set args
void set_pkttype(packet_t pkttype)
virtual int& size()
Agent instproc traffic-source agent

Protected Fields

Application* app_
Tcl_Channel channel_
int class_
int defttl_
ns_addr_t dst_
int fid_
int flags_
ns_addr_t here_
int off_ip_
OldValue* oldValueList_
int prio_
int seqno_
int size_
char* traceName_
packet_t type_
static int uidcnt_

Protected Methods

void addAgentTrace(const char *name)
Packet* allocpkt()
Packet* allocpkt(int)
void deleteAgentTrace()
void dumpTracedVars()
virtual void idle()
void initpkt(Packet*)
void insertOldValue(TracedVar *v, const char *value)
OldValue* lookupOldValue(TracedVar *v)
void monitorAgentTrace()
virtual void recvBytes(int bytes)

Private Methods

void flushAVar(TracedVar *v)

Inherited from Connector:

Public Methods

virtual void drop(Packet* p)
inline NsObject* target()

Protected Fields

NsObject* drop_
NsObject* target_

Protected Methods

virtual void drop(Packet* p, const char *s)

Inherited from NsObject:

Public Methods

virtual void debug(const char *fmt, ...)
int isdebug()

Protected Fields

int debug_
int off_cmn_
int off_flags_

Protected Methods

void handle(Event*)

Inherited from Handler:


Documentation

TCP vegas (VegasTcpAgent)
VegasTcpAgent()

virtual void recv(Packet *pkt, Handler *)

virtual void timeout(int tno)

double vegastime()

virtual void output(int seqno, int reason = 0)

virtual void recv_newack_helper(Packet*)

int vegas_expire(Packet*)

void reset()

void vegas_inflate_cwnd(int win, double current_time)

virtual void delay_bind_init_all()

virtual int delay_bind_dispatch(const char *varName, const char *localName, TclObject *tracer)

double t_cwnd_changed_
last time cwnd changed

double firstrecv_
time recv the 1st ack

int v_alpha_
vegas thruput thresholds in pkts

int v_beta_

int v_gamma_
threshold to change from slow-start to

int v_slowstart_
of pkts to send after slow-start, deflt(2)

int v_worried_
of pkts to chk after dup ack (1 or 2)

double v_timeout_
based on fine-grained timer

double v_rtt_

double v_sa_

double v_sd_

int v_cntRTT_
of rtt measured within one rtt

double v_sumRTT_
sum of rtt measured within one rtt

double v_begtime_
tagged pkt sent

int v_begseq_
tagged pkt seqno

double* v_sendtime_
each unacked pkt's sendtime is recorded.

int* v_transmits_
of retx for an unacked pkt

int v_maxwnd_
maxwnd size for v_sendtime_[]

double v_newcwnd_
record un-inflated cwnd

double v_baseRTT_
min of all rtt

double v_incr_
amount cwnd is increased in the next rtt

int v_inc_flag_
if cwnd is allowed to incr for this rtt

double v_actual_
actual send rate (pkt/s; needed for tcp-rbp)

int ns_vegas_fix_level_
see comment at end of tcp-vegas.cc for details of fixes


Direct child classes:
RBPVegasTcpAgent

alphabetic index hierarchy of classes


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Adapted for the NS documentation page

(c)opyright by Malte Zöckler, Roland Wunderling
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