inet_pton_ipv4.c

unix网络编程第一卷socket编程书上的全部源代码

#include	<sys/types.h>
#include	<sys/socket.h>
#include	<netinet/in.h>
#include	<arpa/inet.h>
#include	<errno.h>
#include	<string.h>

/* Delete following line if your system's headers already DefinE this
   function prototype */
int		 inet_aton(const char *, struct in_addr *);

/* include inet_pton */
int
inet_pton(int family, const char *strptr, void *addrptr)
{
    if (family == AF_INET) {
    	struct in_addr  in_val;

        if (inet_aton(strptr, &in_val)) {
            memcpy(addrptr, &in_val, sizeof(struct in_addr));
            return (1);
        }
		return(0);
    }
	errno = EAFNOSUPPORT;
    return (-1);
}
/* end inet_pton */