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ea9878ec27
This switches to public symbols without __ prefixes, due to improved namespace management in glibc. The script was used with --no-new-version to move the symbols __res_nquery, __res_nquerydomain, __res_nsearch, __res_query, __res_querydomain, __res_search, res_query, res_querydomain, res_search. The public symbols res_nquery, res_nquerydomain, res_nsearch, res_ownok, res_query, res_querydomain, res_search were added with make update-all-abi. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
116 lines
4.8 KiB
C
116 lines
4.8 KiB
C
/* libresolv interfaces for internal use across glibc.
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Copyright (C) 2016-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _RESOLV_INTERNAL_H
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#define _RESOLV_INTERNAL_H 1
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#include <resolv.h>
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#include <stdbool.h>
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/* Resolver flags. Used for _flags in struct __res_state. */
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#define RES_F_VC 0x00000001 /* Socket is TCP. */
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#define RES_F_CONN 0x00000002 /* Socket is connected. */
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#define RES_F_EDNS0ERR 0x00000004 /* EDNS0 caused errors. */
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/* Legacy function. This needs to be removed once all NSS modules
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have been adjusted. */
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static inline bool
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res_use_inet6 (void)
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{
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return false;
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}
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enum
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{
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/* The advertized EDNS buffer size. The value 1200 is derived
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from the IPv6 minimum MTU (1280 bytes) minus some arbitrary
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space for tunneling overhead. If the DNS server does not react
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to ICMP Fragmentation Needed But DF Set messages, this should
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avoid all UDP fragments on current networks. Avoiding UDP
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fragments is desirable because it prevents fragmentation-based
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spoofing attacks because the randomness in a DNS packet is
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concentrated in the first fragment (with the headers) and does
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not protect subsequent fragments. */
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RESOLV_EDNS_BUFFER_SIZE = 1200,
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};
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struct resolv_context;
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/* Internal function for implementing res_nmkquery and res_mkquery.
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Also used by __res_context_query. */
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int __res_context_mkquery (struct resolv_context *, int op, const char *dname,
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int class, int type, const unsigned char *data,
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unsigned char *buf, int buflen);
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libc_hidden_proto (__res_context_mkquery)
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/* Main resolver query function for use within glibc. */
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int __res_context_search (struct resolv_context *, const char *, int, int,
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unsigned char *, int, unsigned char **,
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unsigned char **, int *, int *, int *);
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libc_hidden_proto (__res_context_search)
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/* Main resolver query function for use within glibc. */
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int __res_context_query (struct resolv_context *, const char *, int, int,
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unsigned char *, int, unsigned char **,
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unsigned char **, int *, int *, int *);
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libc_hidden_proto (__res_context_query)
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/* Internal function used to implement the query and search
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functions. */
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int __res_context_send (struct resolv_context *, const unsigned char *, int,
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const unsigned char *, int, unsigned char *,
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int, unsigned char **, unsigned char **,
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int *, int *, int *);
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libc_hidden_proto (__res_context_send)
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/* Internal function similar to res_hostalias. */
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const char *__res_context_hostalias (struct resolv_context *,
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const char *, char *, size_t);
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libc_hidden_proto (__res_context_hostalias);
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/* Add an OPT record to a DNS query. */
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int __res_nopt (struct resolv_context *, int n0,
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unsigned char *buf, int buflen, int anslen);
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libc_hidden_proto (__res_nopt)
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/* Convert from presentation format (which usually means ASCII
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printable) to network format (which is usually some kind of binary
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format). The input is in the range [SRC, SRC + SRCLEN). The
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output is written to DST (which has to be 4 or 16 bytes long,
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depending on AF). Return 0 for invalid input, 1 for success, -1
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for an invalid address family. */
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int __inet_pton_length (int af, const char *src, size_t srclen, void *);
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libc_hidden_proto (__inet_pton_length)
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/* Called as part of the thread shutdown sequence. */
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void __res_thread_freeres (void) attribute_hidden;
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/* The Linux kernel does not enable all ICMP messages on a UDP socket
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by default. A call this function enables full error reporting for
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the socket FD. FAMILY must be AF_INET or AF_INET6. Returns 0 on
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success, -1 on failure. */
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int __res_enable_icmp (int family, int fd) attribute_hidden;
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/* Returns the name server address for the indicated index. */
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struct sockaddr *__res_get_nsaddr (res_state statp, unsigned int n);
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libc_hidden_proto (__res_get_nsaddr)
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#endif /* _RESOLV_INTERNAL_H */
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