IP解析

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>


void port_parse(char *str,short * port) {
    int a,b,c,d,e,f;
    char *p = str;
    
    for(int i=0;i<strlen(str);i++)
    {
        if((*p >= '0')&&(*p <= '9'))
        {
            if(6 == sscanf(p,"%d,%d,%d,%d,%d,%d",&a,&b,&c,&d,&e,&f)){
                {
                    *port = (e<<8)+f;
                    printf("port %d
",*port);
                }
                return;
            }
        }
        p++;
    }
}

int main() {
    char * p1 = "227 Entering Passive Mode (59,37,162,9,19,157).";
    char str[50];
    strcpy(str,p1);
    short port;    
    port_parse(str,&port);
    return 0;
}

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