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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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3
include/resolv.h
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@ -48,6 +48,8 @@ extern void res_send_setrhook (res_send_rhook __hook);
extern int res_ourserver_p (const res_state __statp,
const struct sockaddr_in6 *__inp);
extern void __res_iclose (res_state statp, bool free_addr);
extern int __res_nopt(res_state statp, int n0, u_char *buf, int buflen,
int anslen);
libc_hidden_proto (__res_ninit)
libc_hidden_proto (__res_maybe_init)
libc_hidden_proto (__res_nclose)
@ -100,6 +102,7 @@ libresolv_hidden_proto (__ns_name_ntop)
libresolv_hidden_proto (__ns_name_unpack)
libresolv_hidden_proto (__ns_get16)
libresolv_hidden_proto (__ns_get32)
libresolv_hidden_proto (__res_nopt)
extern const char *_res_opcodes[];
libresolv_hidden_proto (_res_opcodes)