1. inet_aton (), inet_addr (), inet_ntoa () converts IPv4 addresses between the 32-bit network word sequence binary between the descent decimal number. 2. INET_PTON (), INET_NTOP () is a newer function, processing IPv4 and IPv6 addresses. In the Cygwin environment, I cannot pass when I use the inet_pton () or inet_ntop () function. Open Arpa / INET.H: / * ARPA / INET.H
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#ifndef _arpa_inet_h # define _arpa_inet_h
#include
#ifdef __cplusplusextern "c" {# ENDIF
#ifndef __INSIDE_CYGWIN_NET__unsigned long inet_addr (const char *); int inet_aton (const char *, struct in_addr *); unsigned long inet_lnaof (struct in_addr); struct in_addr inet_makeaddr (unsigned long, unsigned long); unsigned int inet_netof (struct in_addr); Unsigned int inet_network (const char *); char * inet_ntoa (struct in_addr); # ENDIF
#ifdef __cplusplus}; # ENDIF
#ENDIF / * _ARPA_INET_H * / You can see that Cygwin does not support two newer functions, that is, Cygwin may not support IPv6. I only use inet_aton (), inet_addr (), inet_ntoa ().
