33 lines
533 B
C
33 lines
533 B
C
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#include <netdb.h>
|
|
|
|
unsigned int ip2int(const char *s)
|
|
{
|
|
int ip[4];
|
|
sscanf(s, "%d.%d.%d.%d", ip, ip + 1, ip + 2, ip + 3);
|
|
return ip[0] << 24 | ip[1] << 16 | ip[2] << 8 | ip[3];
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
if (argc < 2) {
|
|
perror("need ip address string");
|
|
exit(1);
|
|
}
|
|
|
|
printf("%X\n", ip2int(argv[1]));
|
|
|
|
return 0;
|
|
}
|