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ethers, ether_line, ether_aton, ether_ntoa, ether_ntohost, ether_hostton — ???????ͥåȥ??ɥ쥹?Ѵ???????Ĵ???롼????

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Standard C Library (libc, -lc)

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<sys/types.h> <sys/socket.h> <net/ethernet.h> int ether_line(const char *l, struct ether_addr *e, char *hostname) struct ether_addr * ether_aton(const char *a) char * ether_ntoa(const struct ether_addr *n) int ether_ntohost(char *hostname, const struct ether_addr *e) int ether_hostton(const char *hostname, struct ether_addr *e)

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???????δؿ??ϡ? ether_addr ??¤?Τ????Ѥ??ƥ??????ͥåȥ??ɥ쥹??????ޤ??? ???ι?¤?Τϥإå??ե????? ⟨netinet/if_ether.h⟩ ???????????Ƥ??ޤ???

/*
 * ???????ͥå?(MAC)???ɥ쥹?ΥХ??ȿ?
 */
#define ETHER_ADDR_LEN          6

/*
 * 48 ?ӥåȥ??????ͥåȥ??ɥ쥹?ι?¤??
 */
struct  ether_addr {
        u_char octet[ETHER_ADDR_LEN];
};

ether_line() ?ؿ??ϡ? ethers(5) ?????? ASCII ʸ?????Ǥ??? l ??????????ʸ?????ǻ??ꤵ?줿???????ͥåȥ??ɥ쥹?? e ?????ꤷ???ۥ???̾?? h ?????ꤷ?ޤ??? ???δؿ??ϡ? /etc/ethers ?ιԤ򤽤ι?????ʬ?˥ѡ????????Τ˻??Ѥ????ޤ???

ether_aton() ?ؿ??ϡ????????ͥåȥ??ɥ쥹?? ASCII ɽ???? ether_addr ??¤?Τ??Ѵ????ޤ??? Ʊ?ͤˡ? ether_ntoa() ?ϡ? ether_addr ??¤?ΤȤ??ƻ??ꤵ?줿???????ͥåȥ??ɥ쥹?? ASCII ʸ???????Ѵ????ޤ???

ether_ntohost() ?ؿ??? ether_hostton() ?ؿ??ϡ????????ͥåȥ??ɥ쥹?? /etc/ethers ?ǡ????١????ǻ??ꤵ?줿?б??????ۥ???̾?˥ޥåפ??ޤ??? ether_ntohost() ?ϡ????????ͥåȥ??ɥ쥹?????ۥ???̾?ؤ??Ѵ????Ԥ??? ether_hostton() ?ϡ??ۥ???̾???饤?????ͥåȥ??ɥ쥹?ؤ??Ѵ????Ԥ??ޤ???

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ether_line() ?ϡ????????????????? 0 ???֤??ޤ??? Ϳ?????줿?? l ?ΰ????Ǥ??ѡ????Ǥ??ʤ??ä??????? 0 ?Ǥʤ??ͤ??֤??ޤ??? ???Ф??줿???????ͥåȥ??ɥ쥹??Ϳ?????줿 ether_addr ??¤?? e ???֤????ۥ???̾??Ϳ?????줿ʸ???? h ???֤??ޤ???

ether_ntoa() ?ϡ????????????????ȥ??????ͥåȥ??ɥ쥹?? ASCII ɽ???????ä?ʸ?????ؤΥݥ??󥿤??֤??ޤ??? Ϳ?????줿 ether_addr ??¤?Τ??Ѵ??Ǥ??ʤ??ä??????ϡ? NULL ?ݥ??󥿤??֤??ޤ??? Ʊ???褦?ˡ? ether_aton() ???????????? ether_addr ??¤?ΤؤΥݥ??󥿤??֤??????Ԥ????? NULL ?ݥ??󥿤??֤??ޤ???

ether_ntohost() ?ؿ??? ether_hostton() ?ؿ???ξ???Ȥ⡢?????????????? 0 ???֤??? /etc/ethers ?ǡ????١??????˰??פ??????Τ򸫤Ĥ??????ʤ??ä??????? 0 ?Ǥʤ??ͤ??֤??ޤ???

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?桼???ϡ? ether_line(), ether_ntohost() ?????? ether_hostton() ?γƴؿ????Ϥ??????ۥ???̾ʸ???󤬡? ?֤??줿?ۥ???̾?????????????ۤ??礭?????Ȥ??ݾڤ???ɬ?פ??????ޤ???

NIS ???ߺ???

/etc/ethers ?????? 1 ?Ĥ? + ?????ä??Ԥ????????硢 ether_ntohost() ?ؿ??? ether_hostton() ?ؿ??ϡ? /etc/ethers ?ե????????Υǡ????˲ä??ơ? NIS ethers.byname ?????? ethers.byaddr ?ޥåפ?Ĵ?٤褦?Ȥ??ޤ???

??Ϣ????

yp(4), ethers(5)

?Х?

ether_aton() ?ؿ??? ether_ntoa() ?ؿ??ϡ??????餬???˸ƤӽФ??줿?Ȥ??ˤ? ???񤭤???????ǽ???Τ?????Ū???????ΰ?????¸???줿?ͤ??֤??ޤ???

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ethers ?饤?֥????ؿ??Τ??μ????ϡ? FreeBSD 2.1 ?Τ????˺??????졢?о줷?ޤ?????