sdtp.h

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#include <stdint.h>
 
#define TH_FIN  0x01 
#define TH_SYN  0x02 
#define TH_RST  0x04 
#define TH_PUSH 0x08 
#define TH_ACK  0x10 
#define TH_URG  0x20 
 
struct sdtphdr 
{
    uint16_t seqnum;    
    uint16_t acknum;    
    uint8_t  datalen;   
    uint8_t  flags;     
    uint16_t window;    
    uint16_t checksum;  
};
 
#define PORTA        21020    
#define MSS          255      
#define MAXSDTP      10 + MSS 
#define LOREMSIZE    6328     
#define ALPHA        0.125    
#define BETA         0.25     
#define ESTIMATEDRTT 250      
#define DEVRTT       0        
 
int recvtimeout(int s, char *buf, int len, int timeout, 
        struct sockaddr *dest, int *destlen);
 
uint16_t checksum(void *hdr, int count);
 
void printpacket(struct sdtphdr *p);