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resolv: Turn historic name lookup functions into compat symbols
This change also removes the preprocessor-based function renaming. It also applied to tests in resolv/, which ended up running against the historic functions. _endhtent was not part of the ABI because it is not listed in the resolv/Versions file.
This commit is contained in:
Florian Weimer
parent
769998892d
commit
e7eceec0bc
18
ChangeLog
18
ChangeLog
@ -1,3 +1,21 @@
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2016-12-30 Florian Weimer <fweimer@redhat.com>
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* resolv/Makefile (libresolv-routines): Rename gethnamaddr to
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compat-gethnamaddr.
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(CPPFLAGS): Remove.
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* resolv/gethnamaddr.c: Rename ...
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* resolv/compat-gethnamaddr.c: ... to this file.
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(_endhtent): Make static.
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(res_gethostbyname): Renamed from gethostbyname. Turn into compat
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symbol.
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(res_gethostbyname2): Renamed from gethostbyname2. Turn into
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compat symbol.
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(res_gethostbyaddr): Renamed from gethostbyaddr. Turn into compat
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symbol.
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(_sethtent, _gethtent, _gethtbyname, gethtbyname2, _gethtbyaddr):
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Turn into compat symbol.
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* include/resolv.h (_endhtent): Remove declaration.
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2016-12-30 Joseph Myers <joseph@codesourcery.com>
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* bits/types.h (__intmax_t): New typedef.
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@ -26,7 +26,6 @@ extern __thread struct __res_state *__resp attribute_tls_model_ie;
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extern int __res_vinit (res_state, int);
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extern int __res_maybe_init (res_state, int);
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extern void _sethtent (int);
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extern void _endhtent (void);
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extern struct hostent *_gethtent (void);
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extern struct hostent *_gethtbyname (const char *__name);
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extern struct hostent *_gethtbyname2 (const char *__name, int __af);
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@ -42,11 +42,12 @@ routines += gai_sigqueue
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tests += tst-res_hconf_reorder
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endif
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extra-libs-others = $(extra-libs)
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libresolv-routines := gethnamaddr res_comp res_debug \
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libresolv-routines := res_comp res_debug \
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res_data res_mkquery res_query res_send \
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inet_net_ntop inet_net_pton inet_neta base64 \
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ns_parse ns_name ns_netint ns_ttl ns_print \
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ns_samedomain ns_date compat-hooks
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ns_samedomain ns_date \
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compat-hooks compat-gethnamaddr
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libanl-routines := gai_cancel gai_error gai_misc gai_notify gai_suspend \
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getaddrinfo_a
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@ -84,12 +85,6 @@ generated += mtrace-tst-leaks.out tst-leaks.mtrace \
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include ../Rules
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CPPFLAGS += -Dgethostbyname=res_gethostbyname \
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-Dgethostbyname2=res_gethostbyname2 \
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-Dgethostbyaddr=res_gethostbyaddr \
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-Dgetnetbyname=res_getnetbyname \
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-Dgetnetbyaddr=res_getnetbyaddr
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CFLAGS-res_hconf.c = -fexceptions
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# The DNS NSS modules needs the resolver.
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@ -54,23 +54,26 @@
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it exports symbols in the libresolv ABI. The file is not maintained any
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more, nor are these functions. */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <arpa/nameser.h>
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#include <shlib-compat.h>
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#if SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_25)
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#include <stdio.h>
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#include <netdb.h>
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#include <resolv.h>
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#include <ctype.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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# include <sys/types.h>
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# include <sys/param.h>
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# include <sys/socket.h>
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# include <netinet/in.h>
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# include <arpa/inet.h>
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# include <arpa/nameser.h>
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#define MAXALIASES 35
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#define MAXADDRS 35
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# include <stdio.h>
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# include <netdb.h>
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# include <resolv.h>
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# include <ctype.h>
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# include <errno.h>
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# include <stdlib.h>
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# include <string.h>
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# define MAXALIASES 35
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# define MAXADDRS 35
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static char *h_addr_ptrs[MAXADDRS + 1];
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@ -86,17 +89,17 @@ static void map_v4v6_hostent (struct hostent *hp, char **bp, int *len) __THROW;
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extern void addrsort (char **, int) __THROW;
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#if PACKETSZ > 65536
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#define MAXPACKET PACKETSZ
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#else
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#define MAXPACKET 65536
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#endif
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# if PACKETSZ > 65536
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# define MAXPACKET PACKETSZ
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# else
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# define MAXPACKET 65536
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# endif
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/* As per RFC 1034 and 1035 a host name cannot exceed 255 octets in length. */
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#ifdef MAXHOSTNAMELEN
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# undef MAXHOSTNAMELEN
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#endif
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#define MAXHOSTNAMELEN 256
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# ifdef MAXHOSTNAMELEN
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# undef MAXHOSTNAMELEN
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# endif
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# define MAXHOSTNAMELEN 256
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typedef union {
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HEADER hdr;
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@ -108,11 +111,11 @@ typedef union {
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char ac;
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} align;
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#ifndef h_errno
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# ifndef h_errno
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extern int h_errno;
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#endif
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# endif
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#ifdef DEBUG
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# ifdef DEBUG
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static void
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Dprintf (char *msg, int num)
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{
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@ -123,11 +126,11 @@ Dprintf (char *msg, int num)
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__set_errno (save);
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}
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}
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#else
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# define Dprintf(msg, num) /*nada*/
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#endif
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# else
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# define Dprintf(msg, num) /*nada*/
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# endif
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#define BOUNDED_INCR(x) \
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# define BOUNDED_INCR(x) \
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do { \
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cp += x; \
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if (cp > eom) { \
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@ -136,7 +139,7 @@ Dprintf (char *msg, int num)
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} \
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} while (0)
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#define BOUNDS_CHECK(ptr, count) \
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# define BOUNDS_CHECK(ptr, count) \
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do { \
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if ((ptr) + (count) > eom) { \
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__set_h_errno (NO_RECOVERY); \
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@ -419,11 +422,11 @@ getanswer (const querybuf *answer, int anslen, const char *qname, int qtype)
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return (NULL);
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}
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extern struct hostent *gethostbyname2(const char *name, int af);
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libresolv_hidden_proto (gethostbyname2)
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extern struct hostent *res_gethostbyname2(const char *name, int af);
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libresolv_hidden_proto (res_gethostbyname2)
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struct hostent *
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gethostbyname (const char *name)
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res_gethostbyname (const char *name)
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{
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struct hostent *hp;
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@ -432,15 +435,16 @@ gethostbyname (const char *name)
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return (NULL);
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}
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if (_res.options & RES_USE_INET6) {
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hp = gethostbyname2(name, AF_INET6);
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hp = res_gethostbyname2(name, AF_INET6);
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if (hp)
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return (hp);
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}
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return (gethostbyname2(name, AF_INET));
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return (res_gethostbyname2(name, AF_INET));
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}
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compat_symbol (libresolv, res_gethostbyname, res_gethostbyname, GLIBC_2_0);
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struct hostent *
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gethostbyname2 (const char *name, int af)
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res_gethostbyname2 (const char *name, int af)
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{
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union
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{
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@ -568,10 +572,11 @@ gethostbyname2 (const char *name, int af)
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free (buf.buf);
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return ret;
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}
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libresolv_hidden_def (gethostbyname2)
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libresolv_hidden_def (res_gethostbyname2)
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compat_symbol (libresolv, res_gethostbyname2, res_gethostbyname2, GLIBC_2_0);
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struct hostent *
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gethostbyaddr (const void *addr, socklen_t len, int af)
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res_gethostbyaddr (const void *addr, socklen_t len, int af)
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{
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const u_char *uaddr = (const u_char *)addr;
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static const u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff };
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@ -668,6 +673,7 @@ gethostbyaddr (const void *addr, socklen_t len, int af)
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__set_h_errno (NETDB_SUCCESS);
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return (hp);
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}
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compat_symbol (libresolv, res_gethostbyaddr, res_gethostbyaddr, GLIBC_2_0);
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void
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_sethtent (int f)
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@ -679,8 +685,9 @@ _sethtent (int f)
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stayopen = f;
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}
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libresolv_hidden_def (_sethtent)
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compat_symbol (libresolv, _sethtent, _sethtent, GLIBC_2_0);
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void
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static void
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_endhtent (void)
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{
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if (hostf && !stayopen) {
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@ -754,6 +761,7 @@ _gethtent (void)
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return (&host);
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}
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libresolv_hidden_def (_gethtent)
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compat_symbol (libresolv, _gethtent, _gethtent, GLIBC_2_0);
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struct hostent *
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_gethtbyname (const char *name)
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@ -767,6 +775,7 @@ _gethtbyname (const char *name)
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}
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return (_gethtbyname2(name, AF_INET));
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}
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compat_symbol (libresolv, _gethtbyname, _gethtbyname, GLIBC_2_0);
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struct hostent *
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_gethtbyname2 (const char *name, int af)
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@ -789,6 +798,7 @@ _gethtbyname2 (const char *name, int af)
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return (p);
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}
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libresolv_hidden_def (_gethtbyname2)
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compat_symbol (libresolv, _gethtbyname2, _gethtbyname2, GLIBC_2_0);
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struct hostent *
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_gethtbyaddr (const char *addr, size_t len, int af)
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@ -803,6 +813,7 @@ _gethtbyaddr (const char *addr, size_t len, int af)
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return (p);
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}
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libresolv_hidden_def (_gethtbyaddr)
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compat_symbol (libresolv, _gethtbyaddr, _gethtbyaddr, GLIBC_2_0);
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static void
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map_v4v6_address (const char *src, char *dst)
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@ -888,3 +899,5 @@ addrsort (char **ap, int num)
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needsort++;
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}
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}
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#endif /* SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_25) */
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