/*****************************************************************************
?*
?*?Copyright?（C）?2001?Uppsala?University?and?Ericsson?AB.
?*
?*?This?program?is?free?software;?you?can?redistribute?it?and/or?modify
?*?it?under?the?terms?of?the?GNU?General?Public?License?as?published?by
?*?the?Free?Software?Foundation;?either?version?2?of?the?License?or
?*?（at?your?option）?any?later?version.
?*
?*?This?program?is?distributed?in?the?hope?that?it?will?be?useful
?*?but?WITHOUT?ANY?WARRANTY;?without?even?the?implied?warranty?of
?*?MERCHANTABILITY?or?FITNESS?FOR?A?PARTICULAR?PURPOSE.??See?the
?*?GNU?General?Public?License?for?more?details.
?*
?*?You?should?have?received?a?copy?of?the?GNU?General?Public?License
?*?along?with?this?program;?if?not?write?to?the?Free?Software
?*?Foundation?Inc.?59?Temple?Place?Suite?330?Boston?MA??02111-1307??USA
?*
?*?Authors:?Erik?Nordstr鰉?
?*??????????
?*
?*****************************************************************************/

#ifdef?NS_PORT
#include?“ns-2/aodv-uu.h“
#else
#include?
#include?“aodv_hello.h“
#include?“aodv_timeout.h“
#include?“aodv_rrep.h“
#include?“aodv_rreq.h“
#include?“routing_table.h“
#include?“timer_queue.h“
#include?“params.h“
#include?“aodv_socket.h“
#include?“defs.h“
#include?“debug.h“

extern?int?unidir_hack?receive_n_hellos?hello_jittering?optimized_hellos;
static?struct?timer?hello_timer;

#endif

/*?#define?DEBUG_HELLO?*/


long?NS_CLASS?hello_jitter（）
{
????if?（hello_jittering）?{
#ifdef?NS_PORT
	return?（long）?（（（float）?Random::integer（RAND_MAX?+?1）?/?RAND_MAX?-?0.5）
		???????*?JITTER_INTERVAL）;
#else
	return?（long）?（（（float）?random（）?/?RAND_MAX?-?0.5）?*?JITTER_INTERVAL）;
#endif
????}?else
	return?0;
}

void?NS_CLASS?hello_start（）
{
????if?（hello_timer.used）
	return;

????gettimeofday（&this_host.fwd_time?NULL）;

????DEBUG（LOG_DEBUG?0?“Starting?to?send?HELLOs!“）;
????timer_init（&hello_timer?&NS_CLASS?hello_send?NULL）;

????hello_send（NULL）;
}

void?NS_CLASS?hello_stop（）
{
????DEBUG（LOG_DEBUG?0
	??“No?active?forwarding?routes?-?stopped?sending?HELLOs!“）;
????timer_remove（&hello_timer）;
}

void?NS_CLASS?hello_send（void?*arg）
{
????RREP?*rrep;
????AODV_ext?*ext?=?NULL;
????u_int8_t?flags?=?0;
????struct?in_addr?dest;
????long?time_diff?jitter;
????struct?timeval?now;
????int?msg_size?=?RREP_SIZE;
????int?i;

????gettimeofday（&now?NULL）;

????if?（optimized_hellos?&&
	timeval_diff（&now?&this_host.fwd_time）?>?ACTIVE_ROUTE_TIMEOUT）?{
	hello_stop（）;
	return;
????}

????time_diff?=?timeval_diff（&now?&this_host.bcast_time）;
????jitter?=?hello_jitter（）;

????/*?This?check?will?ensure?we?don‘t?send?unnecessary?hello?msgs?in?case
???????we?have?sent?other?bcast?msgs?within?HELLO_INTERVAL?*/
????if?（time_diff?>=?HELLO_INTERVAL）?{

	for?（i?=?0;?i?	????if?（!DEV_NR（i）.enabled）
		continue;
#ifdef?DEBUG_HELLO
	????DEBUG（LOG_DEBUG?0?“sending?Hello?to?255.255.255.255“）;
#endif
	????rrep?=?rrep_create（flags?0?0?DEV

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-10-28?19:38??AODV-master\
?????文件???????10159??2013-10-28?19:38??AODV-master\ChangeLog
?????文件???????17992??2013-10-28?19:38??AODV-master\GPL
?????文件????????6937??2013-10-28?19:38??AODV-master\Makefile
?????文件????????6732??2013-10-28?19:38??AODV-master\MakefileBK
?????文件???????11133??2013-10-28?19:38??AODV-master\README
?????文件???????????0??2013-10-28?19:38??AODV-master\README.md
?????文件???????15077??2013-10-28?19:38??AODV-master\README.ns
?????文件???????13232??2013-10-28?19:38??AODV-master\TAGS
?????文件?????????107??2013-10-28?19:38??AODV-master\TODO
?????文件????????7904??2013-10-28?19:38??AODV-master\aodv_hello.c
?????文件????????1705??2013-10-28?19:38??AODV-master\aodv_hello.h
?????文件????????5900??2013-10-28?19:38??AODV-master\aodv_neighbor.c
?????文件????????1385??2013-10-28?19:38??AODV-master\aodv_neighbor.h
?????文件????????6180??2013-10-28?19:38??AODV-master\aodv_rerr.c
?????文件????????2416??2013-10-28?19:38??AODV-master\aodv_rerr.h
?????文件???????13066??2013-10-28?19:38??AODV-master\aodv_rrep.c
?????文件????????2692??2013-10-28?19:38??AODV-master\aodv_rrep.h
?????文件???????17878??2013-10-28?19:38??AODV-master\aodv_rreq.c
?????文件????????3493??2013-10-28?19:38??AODV-master\aodv_rreq.h
?????文件???????15088??2013-10-28?19:38??AODV-master\aodv_socket.c
?????文件????????2389??2013-10-28?19:38??AODV-master\aodv_socket.h
?????文件????????7537??2013-10-28?19:38??AODV-master\aodv_timeout.c
?????文件????????1559??2013-10-28?19:38??AODV-master\aodv_timeout.h
?????文件???????11233??2013-10-28?19:38??AODV-master\debug.c
?????文件????????1892??2013-10-28?19:38??AODV-master\debug.h
?????文件????????6484??2013-10-28?19:38??AODV-master\defs.h
?????文件????????1746??2013-10-28?19:38??AODV-master\endian.c
?????文件????????1842??2013-10-28?19:38??AODV-master\list.c
?????文件????????1994??2013-10-28?19:38??AODV-master\list.h
?????文件???????10128??2013-10-28?19:38??AODV-master\llf.c
............此處省略40個文件信息