Download OFLOPS: User manual

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CHAPTER 5. DEVELOPING OFLOPS MODULES
uint16
uint32
uint16
uint16
uint16
uint32
uint64
t
t
t
t
t
t
t
udp src port , udp dst port ;
pkt size ;
vlan ;
vlan p ;
vlan cfi ;
delay ;
pkt count ;
/∗ RANDOM −> p a c k e t g e n e r a t e d u n i f o r m l y a t
random f o r t h e s p e c i f i e d r a n g e s
”” −> p a c k e t s a r e g a n e r a t e d s e q u e n t i a l l y
i t e r a t i n g a l l p o s s i b l e p a i r s ∗/
char f l a g s [ 1 0 2 4 ] ;
};
/∗ Adding a p a c k e t g e n e r a t i o n d e s c r i p t i o n t o
on a s p e c i f i c d a t a c h a n n e l ∗/
int a d d t r a f f i c g e n e r a t o r ( struct o f l o p s c o n t e x t ∗ ctx ,
int channel , struct t r a f g e n d e t ∗ d e t ) ;
/∗ s t a r t p a c k e t g e n e r a t i o n ∗/
int s t a r t t r a f f i c g e n e r a t o r ( ) ;
/∗ t e r m i n a t e p a c k e t g e n e r a t i o n ∗/
int s t o p t r a f f i c g e n e r a t o r ( o f l o p s c o n t e x t ∗ c t x ) ;
/∗ r e t u r n s a s t r i n g w i t h d e t a i l e d i n f o r m a t i o n s
r e g r a d i n g p a c k e t g e n e r a t i o p r o c e s s ∗/
char ∗ r e p o r t t r a f f i c g e n e r a t o r ( o f l o p s c o n t e x t ∗ c t x ) ;
struct p k t g e n h d r {
u i n t 3 2 t magic ;
u i n t 3 2 t seq num ;
uint32 t tv sec ;
uint32 t tv usec ;
};
/∗ E x t r a c t p a c k e t g e n e r a t i o n d e t a i l s from a p a c k e t
∗/
struct p k t g e n h d r ∗ e x t r a c t p k t g e n p k t ( o f l o p s c o n t e x t ∗ ctx , int port ,
unsigned char ∗b , int l e n , struct f l o w
In order to initialize the packet generation process the developer must use
the init traf gen function before ay other calls to the packet generation system.
Once the mechanism has beed initiated, the module can add packet generation
descriptions to each data channel. A packet generation description is provided