my_ping.h

ping 程序

#include "stdio.h"
#include "sys/signal.h"
#include "stdlib.h"
#include "string.h"
 
#include "unistd.h"
#include "netdb.h"
#include "sys/types.h"
#include "sys/socket.h"
#include "netinet/in.h"
#include "arpa/inet.h"
#include "time.h"
#include "sys/time.h"
#include "sys/stat.h"
#include "errno.h"
#include "netinet/ip.h"
#include "netinet/in_systm.h"
#include "netinet/ip_icmp.h"
 
#define BUFSIZE 1500
 
char sendbuf[BUFSIZE];
 
int datalen;
char* host;  //add one for each sendto()
int nsent;   //out pid
pid_t pid;
int sockfd;
int verbose;
 
void proc_v4(char*, ssize_t, struct msghdr*, struct timeval*);
void send_v4(void);
void readloop(void);
void sig_alarm(int);
void tv_sub(struct timeval*, struct timeval*);
 
struct proto {
        void (*fproc)(char*, ssize_t, struct msghdr*, struct timeval*);
        void (*fsend)(void);
        void (*finit)(void);
        struct sockaddr* sasend;
        struct sockaddr* sarecv;
        socklen_t salen;
        int icmpproto;
}*pr;
 
u_short in_cksum(u_short*, int);