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resolv: Remove _LIBC conditionals
This commit is contained in:
Florian Weimer
parent
1f32be054b
commit
c99c925b8b
@ -1,3 +1,12 @@
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2016-04-28 Florian Weimer <fweimer@redhat.com>
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* resolv/inet_addr.c: Remove _LIBC conditionals.
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* resolv/res_data.c: Likewise.
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* resolv/res_init.c: Likewise.
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* resolv/res_mkquery.c: Likewise.
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* resolv/res_libc.c: Update comment.
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* resolv/README: Update.
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2016-04-28 Florian Weimer <fweimer@redhat.com>
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* resolv/gethnamaddr.c: Remove SCSS keyword.
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@ -149,8 +149,7 @@ src/lib/isc/
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base64.c
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Some of these files have been optimised a bit, and adaptations have
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been made to make them fit in with the rest of glibc. The more
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non-obvious changes are wrapped in something like `#ifdef _LIBC'.
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been made to make them fit in with the rest of glibc.
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res_libc.c is home-brewn, although parts of it are taken from res_data.c.
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@ -72,13 +72,11 @@
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#include <ctype.h>
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#ifdef _LIBC
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# include <endian.h>
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# include <stdint.h>
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# include <stdlib.h>
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# include <limits.h>
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# include <errno.h>
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#endif
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/*
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* Ascii internet address interpretation routine.
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@ -106,9 +104,6 @@ __inet_aton(const char *cp, struct in_addr *addr)
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{
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static const in_addr_t max[4] = { 0xffffffff, 0xffffff, 0xffff, 0xff };
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in_addr_t val;
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#ifndef _LIBC
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int base;
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#endif
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char c;
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union iaddr {
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uint8_t bytes[4];
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@ -117,10 +112,8 @@ __inet_aton(const char *cp, struct in_addr *addr)
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uint8_t *pp = res.bytes;
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int digit;
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#ifdef _LIBC
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int saved_errno = errno;
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__set_errno (0);
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#endif
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res.word = 0;
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@ -133,7 +126,6 @@ __inet_aton(const char *cp, struct in_addr *addr)
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*/
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if (!isdigit(c))
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goto ret_0;
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#ifdef _LIBC
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{
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char *endp;
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unsigned long ul = strtoul (cp, (char **) &endp, 0);
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@ -146,33 +138,6 @@ __inet_aton(const char *cp, struct in_addr *addr)
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cp = endp;
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}
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c = *cp;
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#else
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val = 0; base = 10; digit = 0;
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if (c == '0') {
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c = *++cp;
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if (c == 'x' || c == 'X')
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base = 16, c = *++cp;
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else {
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base = 8;
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digit = 1 ;
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}
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}
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for (;;) {
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if (isascii(c) && isdigit(c)) {
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if (base == 8 && (c == '8' || c == '9'))
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return (0);
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val = (val * base) + (c - '0');
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c = *++cp;
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digit = 1;
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} else if (base == 16 && isascii(c) && isxdigit(c)) {
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val = (val << 4) |
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(c + 10 - (islower(c) ? 'a' : 'A'));
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c = *++cp;
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digit = 1;
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} else
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break;
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}
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#endif
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if (c == '.') {
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/*
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* Internet format:
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@ -206,15 +171,11 @@ __inet_aton(const char *cp, struct in_addr *addr)
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if (addr != NULL)
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addr->s_addr = res.word | htonl (val);
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#ifdef _LIBC
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__set_errno (saved_errno);
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#endif
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return (1);
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ret_0:
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#ifdef _LIBC
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__set_errno (saved_errno);
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#endif
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return (0);
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}
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weak_alias (__inet_aton, inet_aton)
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@ -65,67 +65,6 @@ const char *_res_sectioncodes[] attribute_hidden = {
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#endif
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#ifndef __BIND_NOSTATIC
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#ifdef _LIBC
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/* The definition has been moved to res_libc.c. */
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#else
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#undef _res
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struct __res_state _res
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# if defined(__BIND_RES_TEXT)
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= { RES_TIMEOUT, } /* Motorola, et al. */
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# endif
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;
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#endif
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/* Proto. */
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#ifndef _LIBC
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int res_ourserver_p(const res_state, const struct sockaddr_in *);
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void res_pquery(const res_state, const u_char *, int, FILE *);
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#endif
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#ifndef _LIBC
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/* Moved to res_libc.c since res_init() should go into libc.so but the
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rest of this file not. */
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int
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res_init(void) {
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extern int __res_vinit(res_state, int);
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/*
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* These three fields used to be statically initialized. This made
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* it hard to use this code in a shared library. It is necessary,
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* now that we're doing dynamic initialization here, that we preserve
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* the old semantics: if an application modifies one of these three
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* fields of _res before res_init() is called, res_init() will not
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* alter them. Of course, if an application is setting them to
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* _zero_ before calling res_init(), hoping to override what used
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* to be the static default, we can't detect it and unexpected results
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* will follow. Zero for any of these fields would make no sense,
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* so one can safely assume that the applications were already getting
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* unexpected results.
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*
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* _res.options is tricky since some apps were known to diddle the bits
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* before res_init() was first called. We can't replicate that semantic
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* with dynamic initialization (they may have turned bits off that are
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* set in RES_DEFAULT). Our solution is to declare such applications
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* "broken". They could fool us by setting RES_INIT but none do (yet).
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*/
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if (!_res.retrans)
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_res.retrans = RES_TIMEOUT;
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if (!_res.retry)
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_res.retry = 4;
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if (!(_res.options & RES_INIT))
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_res.options = RES_DEFAULT;
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/*
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* This one used to initialize implicitly to zero, so unless the app
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* has set it to something in particular, we can randomize it now.
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*/
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if (!_res.id)
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_res.id = res_randomid();
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return (__res_vinit(&_res, 1));
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}
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#endif
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void
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p_query(const u_char *msg) {
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fp_query(msg, stdout);
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@ -215,23 +154,9 @@ res_send(const u_char *buf, int buflen, u_char *ans, int anssiz) {
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return (res_nsend(&_res, buf, buflen, ans, anssiz));
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}
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#ifndef _LIBC
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int
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res_sendsigned(const u_char *buf, int buflen, ns_tsig_key *key,
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u_char *ans, int anssiz)
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{
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if (__res_maybe_init (&_res, 1) == -1) {
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/* errno should have been set by res_init() in this case. */
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return (-1);
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}
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return (res_nsendsigned(&_res, buf, buflen, key, ans, anssiz));
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}
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#endif
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void
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res_close(void) {
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#ifdef _LIBC
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/*
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* Some stupid programs out there call res_close() before res_init().
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* Since _res._vcsock isn't explicitly initialized, these means that
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@ -241,7 +166,6 @@ res_close(void) {
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* early. */
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if ((_res.options & RES_INIT) == 0)
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return;
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#endif
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/* We don't free the name server addresses because we never
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did it and it would be done implicitly on shutdown. */
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__res_iclose(&_res, false);
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@ -102,9 +102,7 @@ static u_int32_t net_mask (struct in_addr) __THROW;
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# define isascii(c) (!(c & 0200))
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#endif
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#ifdef _LIBC
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unsigned long long int __res_initstamp attribute_hidden;
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#endif
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/*
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* Resolver state default settings.
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@ -123,9 +121,7 @@ res_ninit(res_state statp) {
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return (__res_vinit(statp, 0));
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}
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#ifdef _LIBC
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libc_hidden_def (__res_ninit)
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#endif
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/* This function has to be reachable by res_data.c but not publically. */
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int
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@ -145,9 +141,7 @@ __res_vinit(res_state statp, int preinit) {
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#ifndef RFC1535
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int dots;
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#endif
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#ifdef _LIBC
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statp->_u._ext.initstamp = __res_initstamp;
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#endif
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if (!preinit) {
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statp->retrans = RES_TIMEOUT;
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@ -283,7 +277,6 @@ __res_vinit(res_state statp, int preinit) {
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statp->nsaddr_list[nserv].sin_port =
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htons(NAMESERVER_PORT);
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nserv++;
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#ifdef _LIBC
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} else {
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struct in6_addr a6;
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char *el;
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@ -332,7 +325,6 @@ __res_vinit(res_state statp, int preinit) {
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nserv++;
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}
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}
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#endif
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}
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continue;
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}
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@ -385,12 +377,10 @@ __res_vinit(res_state statp, int preinit) {
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}
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}
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statp->nscount = nserv;
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#ifdef _LIBC
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if (have_serv6) {
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/* We try IPv6 servers again. */
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statp->ipv6_unavail = false;
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}
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#endif
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#ifdef RESOLVSORT
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statp->nsort = nsort;
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#endif
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@ -554,9 +544,7 @@ u_int
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res_randomid(void) {
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return 0xffff & __getpid();
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}
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#ifdef _LIBC
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libc_hidden_def (__res_randomid)
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#endif
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/*
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@ -594,11 +582,8 @@ res_nclose(res_state statp)
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{
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__res_iclose (statp, true);
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}
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#ifdef _LIBC
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libc_hidden_def (__res_nclose)
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#endif
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#ifdef _LIBC
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# ifdef _LIBC_REENTRANT
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/* This is called when a thread is exiting to free resources held in _res. */
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static void __attribute__ ((section ("__libc_thread_freeres_fn")))
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@ -616,4 +601,3 @@ res_thread_freeres (void)
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text_set_element (__libc_thread_subfreeres, res_thread_freeres);
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text_set_element (__libc_subfreeres, res_thread_freeres);
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# endif
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#endif
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@ -15,6 +15,9 @@
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* SOFTWARE.
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*/
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/* This file contains the definitions related to res_init which are
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linked into libc instead of libresolv. */
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#include <atomic.h>
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#include <limits.h>
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#include <sys/types.h>
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@ -23,11 +26,6 @@
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#include <resolv.h>
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#include <libc-lock.h>
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/* The following bit is copied from res_data.c (where it is #ifdef'ed
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out) since res_init() should go into libc.so but the rest of that
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file should not. */
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extern unsigned long long int __res_initstamp attribute_hidden;
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/* We have atomic increment operations on 64-bit platforms. */
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#if __WORDSIZE == 64
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@ -77,13 +77,11 @@
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/* Options. Leave them on. */
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/* #define DEBUG */
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#ifdef _LIBC
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# include <hp-timing.h>
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# include <stdint.h>
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# if HP_TIMING_AVAIL
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# define RANDOM_BITS(Var) { uint64_t v64; HP_TIMING_NOW (v64); Var = v64; }
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# endif
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#endif
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/*
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* Form all types of queries.
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