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addr2ascii, ascii2addr —

????Ū?ʥ??ɥ쥹?ե????ޥåȥ롼????

?饤?֥???

Standard C Library (libc, -lc)

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<sys/types.h> <netinet/in.h> <arpa/inet.h> char * addr2ascii(int af, const void *addrp, int len, char *buf) int ascii2addr(int af, const char *ascii, void *result)

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?롼???? addr2ascii() ?? ascii2addr() ?ϡ??Х??ʥ??????ȡ????ɥ쥹?ե??ߥ???Ŭ?ڤʰ?????ǽ?ʷ????Ȥδ֤? ?ͥåȥ?????ɥ쥹???Ѵ??????Τ˻??Ѥ????ޤ??? ξ???δؿ??Ȥ⡢?Ѵ??ץ??????ǻ??Ѥ????륢?ɥ쥹?ե??ߥ??????ꤹ?? af ?????????Ѥ??ޤ? (???????Ǥϡ? AF_INET ?????? AF_LINK ???ɥ쥹?ե??ߥ??????????ݡ??Ȥ????Ƥ??ޤ?)??

addr2ascii() ?ؿ??ϡ??Х??ʥ??Υͥåȥ???????Υ??ɥ쥹????????ǽ?ʷ????? ?Ѵ??????Τ˻??Ѥ????ޤ??? af ??¾?ˡ? 3 ?Ĥΰ??????????ޤ??? addrp ?????ϡ??Ѵ??????ͥåȥ?????ɥ쥹?ؤΥݥ??󥿤Ǥ??? len ?????ϡ????ɥ쥹??Ĺ???Ǥ??? buf ?????ϡ????̤??ݻ????뤿???˸ƤӽФ????????꿶?? ?Хåե??ؤΥ??ץ??????Υݥ??󥿤Ǥ??? ?̥??ݥ??󥿤??Ϥ??????ȡ? addr2ascii() ????Ū?˳??꿶???줿?Хåե??????Ѥ??ޤ???

ascii2addr() ?ؿ??ϡ? addr2ascii() ?ȵդ????????¹Ԥ??ޤ??? af ?˲ä??ơ?2 ?ĤΥѥ??᡼?? ascii ?? result ?????Ѥ??ޤ??? ascii ?ѥ??᡼???ϡ??Х??ʥ????Ѵ???????ʸ?????ؤΥݥ??󥿤Ǥ??? result ?ѥ??᡼???ϡ????ꤵ?줿?ե??ߥ???Ŭ?ڤʥͥåȥ?????ɥ쥹??¤?Τؤ? ?ݥ??󥿤Ǥ???

???ꤵ?줿?ե??ߥ??ˤ????ƻ??Ѥ??????Х??ʥꥢ?ɥ쥹?Ȥ??? Ŭ?ڤʹ?¤?Τϼ??ΤȤ????Ǥ???

AF_INET: struct in_addr (in ⟨netinet/in.h⟩)
AF_LINK: struct sockaddr_dl (in ⟨net/if_dl.h⟩)

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addr2ascii() ?ؿ??ϡ??Ϥ??줿?Хåե??Υ??ɥ쥹???ޤ??? NULL ?ݥ??󥿤??Ϥ??줿????????Ū?Хåե??Υ??ɥ쥹???֤??ޤ??? ?????????Ԥ????????ϡ??̥??ݥ??󥿤??֤??ޤ??? ascii2addr() ?ؿ??ϡ??Х??ʥꥢ?ɥ쥹??Ĺ?? (?Х???ñ??) ???֤??ޤ??? ?????????Ԥ????????? -1 ???֤??ޤ???

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inet(3) ?ؿ? inet_ntoa() ?? inet_aton() ?ϼ??Τ褦?˼??????뤳?Ȥ??Ǥ??ޤ???

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

char *
inet_ntoa(struct in_addr addr)
{
        return addr2ascii(AF_INET, &addr, sizeof addr, 0);
}

int
inet_aton(const char *ascii, struct in_addr *addr)
{
        return (ascii2addr(AF_INET, ascii, addr)
            == sizeof(*addr));
}

?ºݤˤϡ??????ϼ¹ԤǤ??ޤ????? addr2ascii() ?? ascii2addr() ?ϡ?¾????ˡ?Ǥʤ??? inet(3) ?ؿ??Ǽ????????Ƥ??뤫???Ǥ???

???顼

???????Ԥ??֤??줿?Ȥ??? errno ?˼????ͤ? 1 ?Ĥ????ꤵ???ޤ???

[ENAMETOOLONG]: addr2ascii() ?롼?????ϡ? af ?ˤ??ä??Ϥ??줿???ɥ쥹?ե??ߥ?????Ŭ?ڤʥѥ??᡼?? len ???Ϥ????ޤ?????
[EPROTONOSUPPORT]: ?????줫?Υ롼?????ˡ? AF_INET ?ޤ??? AF_LINK ?ǤϤʤ? af ?ѥ??᡼?????Ϥ????ޤ?????
[EINVAL]: ascii2addr() ???Ϥ??줿ʸ?????ϡ? ???ɥ쥹?ե??ߥ? af ?ˤĤ?????Ŭ?ڤ˥ե????ޥåȤ????Ƥ??ޤ?????

??Ϣ????

inet(3), linkaddr(3), inet(4)

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?????˶ᤤ???󥿥ե??????ϡ????Ȥ??? Craig Partridge ?ˤ??ä? ???Ƥ????ޤ????? ???Υ??󥿥ե????????Τϡ? INRIA ?? IPv6 ?μ????ˤ??ꡢ?Ϥ??????о줷?ޤ?????

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?????ɤȥɥ????????Ȥ? MIT Laboratory for Computer Science ?? Garrett A. Wollman ?ˤ??????ΤǤ???

?Х?

???ꥸ?ʥ??μ????? IPv6 ?򥵥ݡ??Ȥ??Ƥ??ޤ????? ???Υ??ݡ??Ȥϡ????Τ??????褵?????Ϥ??Ǥ??? NRL ?μ????ˤϡ? AF_ISO ?????? AF_NS ???ɥ쥹?ե??ߥ??Υ??ݡ??Ȥ??ޤޤ??Ƥ??ޤ?????

???Υ??󥿥ե??????ΰ??????ˤĤ??Ƥϡ??????餫???䤬?????ޤ??? ?????˰???Ū?ʥ??󥿥ե??????Ǥ????С??Хåե???ưŪ?˳??????Ƥ뤳?Ȥ? ?Ǥ????褦?????Ѥ??????Хåե???Ĺ???????ꤹ?????ʤ??????Ƥ????Ǥ??礦???? ?Х??ʥꥢ?ɥ쥹???ݻ??????Τˤ?ɬ?? “struct sockaddr” ???׵᤹???Ǥ??礦?? ??ǰ?ʤ??顢?????ϴ?¸?Τ??????ȸߴ??????????ޤ????? ???????¤Τ??ᡢǤ?դΥ??ɥ쥹?ե??ߥ꤫???ͥåȥ?????ɥ쥹?? ?????????롼?????ϡ?ɬ?פʺ????Хåե?Ĺ?䡢 ?Х??ʥꥢ?ɥ쥹?Ȥ??ƻ??Ѥ??륢?ɥ쥹??Ŭ?ڤ???ʬ?Ȥ??ä? ????Ū???μ????????Ȥ??ƻ??äƤ??ʤ????Фʤ??ޤ?????