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* resolv/res_init.c (res_setoptions): Recognize edns0 option.

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* resolv/res_mkquery.c: Define __res_nopt.
	* resolv/res_query.c (__libc_res_nquery): If RES_USE_EDNS0 is set
	try adding EDNS0 record.
	* resolv/res_send.c (send_dg): If request failed with FORMERR and
	EDNS0 record was send make sure we don't try it again.
	* resolv/resolv.h: Define RES_F_EDNS0ERR and RES_USE_EDNS0.
	* include/resolv.h: Declare __res_nopt.
This commit is contained in:
Ulrich Drepper
2007-02-09 23:46:29 +00:00
parent 00458b5bee
commit 2bbb7d5b3c
7 changed files with 104 additions and 7 deletions
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2
resolv/res_init.c
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@ -510,6 +510,8 @@ res_setoptions(res_state statp, const char *options, const char *source) {
} else if (!strncmp(cp, "no-check-names",
sizeof("no-check-names") - 1)) {
statp->options |= RES_NOCHECKNAME;
} else if (!strncmp(cp, "edns0", sizeof("edns0") - 1)) {
statp->options |= RES_USE_EDNS0;
} else {
/* XXX - print a warning here? */
}