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Sem5 Networking: Program to simulate stop and wait protocolThis file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
| #include |
| int sender (); |
| int recv (); |
| int timer = 0 , wait_for_ack = -1 , frameQ = 0 , cansend = 1 , t = 0 ; |
| main () |
| int i , j ; |
| int frame [ 5 ]; |
| printf ( "enter the time when data frame will be ready\n" ); |
| for ( j = 0 ; j < 3 ; j ++ ) |
| sender ( i , frame [ ]); |
| recv ( i ); |
| > |
| sender ( int i , int frame []) |
| wait_for_ack ++ ; |
| if ( wait_for_ack == 3 ) |
| if ( i == frame [ t ]) |
| frameQ ++ ; |
| t ++ ; |
| > |
| if ( frameQ == 0 ) |
| printf ( "NO FRAME TO SEND at time=%d \n" , i ); |
| if ( frameQ > 0 && cansend == 1 ) |
| printf ( "FRAME SEND AT TIME=%d\n" , i ); |
| cansend = -1 ; |
| frameQ -- ; |
| timer ++ ; |
| printf ( "timer in sender=%d\n" , timer ); |
| > |
| if ( frameQ > 0 && cansend == -1 ) |
| printf ( "FRAME IN Q FOR TRANSMISSION AT TIME=%d\n" , i ); |
| if ( frameQ > 0 ) |
| t ++ ; |
| > |
| printf ( "frameQ=%d\n" , frameQ ); |
| printf ( "i=%d t=%d\n" , i , t ); |
| printf ( "value in frame=%d\n" , frame [ t ]); |
| return 0 ; |
| > |
| int recv ( int i ) |
| < printf ( "timer in recvr=%d\n" , timer ); |
| if ( timer > 0 ) |
| timer ++ ; |
| > |
| if ( timer == 3 ) |
| printf ( "FRAME ARRIVED AT TIME= %d\n" , i ); |
| wait_for_ack = 0 ; |
| timer = 0 ; |
| > |
| else |
| printf ( "WAITING FOR FRAME AT TIME %d\n" , i ); |
| return 0 ; |
| > |
| > |