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glibc/sunrpc/clnt_perr.c
Adhemerval Zanella Netto 88677348b4 Move libc_freeres_ptrs and libc_subfreeres to hidden/weak functions 
They are both used by __libc_freeres to free all library malloc
allocated resources to help tooling like mtrace or valgrind with
memory leak tracking.

The current scheme uses assembly markers and linker script entries
to consolidate the free routine function pointers in the RELRO segment
and to be freed buffers in BSS.

This patch changes it to use specific free functions for
libc_freeres_ptrs buffers and call the function pointer array directly
with call_function_static_weak.

It allows the removal of both the internal macros and the linker
script sections.

Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2023-03-27 13:57:55 -03:00

397 lines
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/*
* clnt_perror.c
*
* Copyright (c) 2010, 2011, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
* * Neither the name of the "Oracle America, Inc." nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <string.h>
#include <libintl.h>
#include <rpc/rpc.h>
#include <wchar.h>
#include <libio/iolibio.h>
#include <shlib-compat.h>
static char *auth_errmsg (enum auth_stat stat);
/*
* Making buf a preprocessor macro requires renaming the local
* buf variable in a few functions. Overriding a global variable
* with a local variable of the same name is a bad idea, anyway.
*/
#define buf RPC_THREAD_VARIABLE(clnt_perr_buf_s)
/*
* Print reply error info
*/
char *
clnt_sperror (CLIENT * rpch, const char *msg)
{
struct rpc_err e;
CLNT_GETERR (rpch, &e);
const char *errstr = clnt_sperrno (e.re_status);
char chrbuf[1024];
char *str;
char *tmpstr;
int res;
switch (e.re_status)
{
case RPC_SUCCESS:
case RPC_CANTENCODEARGS:
case RPC_CANTDECODERES:
case RPC_TIMEDOUT:
case RPC_PROGUNAVAIL:
case RPC_PROCUNAVAIL:
case RPC_CANTDECODEARGS:
case RPC_SYSTEMERROR:
case RPC_UNKNOWNHOST:
case RPC_UNKNOWNPROTO:
case RPC_PMAPFAILURE:
case RPC_PROGNOTREGISTERED:
case RPC_FAILED:
res = __asprintf (&str, "%s: %s\n", msg, errstr);
break;
case RPC_CANTSEND:
case RPC_CANTRECV:
res = __asprintf (&str, "%s: %s; errno = %s\n",
msg, errstr, __strerror_r (e.re_errno,
chrbuf, sizeof chrbuf));
break;
case RPC_VERSMISMATCH:
res = __asprintf (&str,
_("%s: %s; low version = %lu, high version = %lu"),
msg, errstr, e.re_vers.low, e.re_vers.high);
break;
case RPC_AUTHERROR:
tmpstr = auth_errmsg (e.re_why);
if (tmpstr != NULL)
res = __asprintf (&str, _("%s: %s; why = %s\n"), msg, errstr, tmpstr);
else
res = __asprintf (&str, _("\
%s: %s; why = (unknown authentication error - %d)\n"),
msg, errstr, (int) e.re_why);
break;
case RPC_PROGVERSMISMATCH:
res = __asprintf (&str,
_("%s: %s; low version = %lu, high version = %lu"),
msg, errstr, e.re_vers.low, e.re_vers.high);
break;
default: /* unknown */
res = __asprintf (&str, "%s: %s; s1 = %lu, s2 = %lu",
msg, errstr, e.re_lb.s1, e.re_lb.s2);
break;
}
if (res < 0)
return NULL;
char *oldbuf = buf;
buf = str;
free (oldbuf);
return str;
}
libc_hidden_nolink_sunrpc (clnt_sperror, GLIBC_2_0)
void
clnt_perror (CLIENT * rpch, const char *msg)
{
(void) __fxprintf (NULL, "%s", clnt_sperror (rpch, msg));
}
#ifdef EXPORT_RPC_SYMBOLS
libc_hidden_def (clnt_perror)
#else
libc_hidden_nolink_sunrpc (clnt_perror, GLIBC_2_0)
#endif
struct rpc_errtab
{
enum clnt_stat status;
unsigned int message_off;
};
static const char rpc_errstr[] =
{
#define RPC_SUCCESS_IDX 0
N_("RPC: Success")
"\0"
#define RPC_CANTENCODEARGS_IDX (RPC_SUCCESS_IDX + sizeof "RPC: Success")
N_("RPC: Can't encode arguments")
"\0"
#define RPC_CANTDECODERES_IDX (RPC_CANTENCODEARGS_IDX \
+ sizeof "RPC: Can't encode arguments")
N_("RPC: Can't decode result")
"\0"
#define RPC_CANTSEND_IDX (RPC_CANTDECODERES_IDX \
+ sizeof "RPC: Can't decode result")
N_("RPC: Unable to send")
"\0"
#define RPC_CANTRECV_IDX (RPC_CANTSEND_IDX \
+ sizeof "RPC: Unable to send")
N_("RPC: Unable to receive")
"\0"
#define RPC_TIMEDOUT_IDX (RPC_CANTRECV_IDX \
+ sizeof "RPC: Unable to receive")
N_("RPC: Timed out")
"\0"
#define RPC_VERSMISMATCH_IDX (RPC_TIMEDOUT_IDX \
+ sizeof "RPC: Timed out")
N_("RPC: Incompatible versions of RPC")
"\0"
#define RPC_AUTHERROR_IDX (RPC_VERSMISMATCH_IDX \
+ sizeof "RPC: Incompatible versions of RPC")
N_("RPC: Authentication error")
"\0"
#define RPC_PROGUNAVAIL_IDX (RPC_AUTHERROR_IDX \
+ sizeof "RPC: Authentication error")
N_("RPC: Program unavailable")
"\0"
#define RPC_PROGVERSMISMATCH_IDX (RPC_PROGUNAVAIL_IDX \
+ sizeof "RPC: Program unavailable")
N_("RPC: Program/version mismatch")
"\0"
#define RPC_PROCUNAVAIL_IDX (RPC_PROGVERSMISMATCH_IDX \
+ sizeof "RPC: Program/version mismatch")
N_("RPC: Procedure unavailable")
"\0"
#define RPC_CANTDECODEARGS_IDX (RPC_PROCUNAVAIL_IDX \
+ sizeof "RPC: Procedure unavailable")
N_("RPC: Server can't decode arguments")
"\0"
#define RPC_SYSTEMERROR_IDX (RPC_CANTDECODEARGS_IDX \
+ sizeof "RPC: Server can't decode arguments")
N_("RPC: Remote system error")
"\0"
#define RPC_UNKNOWNHOST_IDX (RPC_SYSTEMERROR_IDX \
+ sizeof "RPC: Remote system error")
N_("RPC: Unknown host")
"\0"
#define RPC_UNKNOWNPROTO_IDX (RPC_UNKNOWNHOST_IDX \
+ sizeof "RPC: Unknown host")
N_("RPC: Unknown protocol")
"\0"
#define RPC_PMAPFAILURE_IDX (RPC_UNKNOWNPROTO_IDX \
+ sizeof "RPC: Unknown protocol")
N_("RPC: Port mapper failure")
"\0"
#define RPC_PROGNOTREGISTERED_IDX (RPC_PMAPFAILURE_IDX \
+ sizeof "RPC: Port mapper failure")
N_("RPC: Program not registered")
"\0"
#define RPC_FAILED_IDX (RPC_PROGNOTREGISTERED_IDX \
+ sizeof "RPC: Program not registered")
N_("RPC: Failed (unspecified error)")
};
static const struct rpc_errtab rpc_errlist[] =
{
{ RPC_SUCCESS, RPC_SUCCESS_IDX },
{ RPC_CANTENCODEARGS, RPC_CANTENCODEARGS_IDX },
{ RPC_CANTDECODERES, RPC_CANTDECODERES_IDX },
{ RPC_CANTSEND, RPC_CANTSEND_IDX },
{ RPC_CANTRECV, RPC_CANTRECV_IDX },
{ RPC_TIMEDOUT, RPC_TIMEDOUT_IDX },
{ RPC_VERSMISMATCH, RPC_VERSMISMATCH_IDX },
{ RPC_AUTHERROR, RPC_AUTHERROR_IDX },
{ RPC_PROGUNAVAIL, RPC_PROGUNAVAIL_IDX },
{ RPC_PROGVERSMISMATCH, RPC_PROGVERSMISMATCH_IDX },
{ RPC_PROCUNAVAIL, RPC_PROCUNAVAIL_IDX },
{ RPC_CANTDECODEARGS, RPC_CANTDECODEARGS_IDX },
{ RPC_SYSTEMERROR, RPC_SYSTEMERROR_IDX },
{ RPC_UNKNOWNHOST, RPC_UNKNOWNHOST_IDX },
{ RPC_UNKNOWNPROTO, RPC_UNKNOWNPROTO_IDX },
{ RPC_PMAPFAILURE, RPC_PMAPFAILURE_IDX },
{ RPC_PROGNOTREGISTERED, RPC_PROGNOTREGISTERED_IDX },
{ RPC_FAILED, RPC_FAILED_IDX }
};
/*
* This interface for use by clntrpc
*/
char *
clnt_sperrno (enum clnt_stat stat)
{
size_t i;
for (i = 0; i < sizeof (rpc_errlist) / sizeof (struct rpc_errtab); i++)
{
if (rpc_errlist[i].status == stat)
{
return _(rpc_errstr + rpc_errlist[i].message_off);
}
}
return _("RPC: (unknown error code)");
}
#ifdef EXPORT_RPC_SYMBOLS
libc_hidden_def (clnt_sperrno)
#else
libc_hidden_nolink_sunrpc (clnt_sperrno, GLIBC_2_0)
#endif
void
clnt_perrno (enum clnt_stat num)
{
(void) __fxprintf (NULL, "%s", clnt_sperrno (num));
}
#ifdef EXPORT_RPC_SYMBOLS
libc_hidden_def (clnt_perrno)
#else
libc_hidden_nolink_sunrpc (clnt_perrno, GLIBC_2_0)
#endif
char *
clnt_spcreateerror (const char *msg)
{
struct rpc_createerr *ce = &get_rpc_createerr ();
char chrbuf[1024];
const char *connector = "";
const char *errstr = "";
switch (ce->cf_stat)
{
case RPC_PMAPFAILURE:
connector = " - ";
errstr = clnt_sperrno (ce->cf_error.re_status);
break;
case RPC_SYSTEMERROR:
connector = " - ";
errstr = __strerror_r (ce->cf_error.re_errno, chrbuf, sizeof chrbuf);
break;
default:
break;
}
char *str;
if (__asprintf (&str, "%s: %s%s%s\n",
msg, clnt_sperrno (ce->cf_stat), connector, errstr) < 0)
return NULL;
char *oldbuf = buf;
buf = str;
free (oldbuf);
return str;
}
libc_hidden_nolink_sunrpc (clnt_spcreateerror, GLIBC_2_0)
void
clnt_pcreateerror (const char *msg)
{
(void) __fxprintf (NULL, "%s", clnt_spcreateerror (msg));
}
#ifdef EXPORT_RPC_SYMBOLS
libc_hidden_def (clnt_pcreateerror)
#else
libc_hidden_nolink_sunrpc (clnt_pcreateerror, GLIBC_2_0)
#endif
struct auth_errtab
{
enum auth_stat status;
unsigned int message_off;
};
static const char auth_errstr[] =
{
#define AUTH_OK_IDX 0
N_("Authentication OK")
"\0"
#define AUTH_BADCRED_IDX (AUTH_OK_IDX + sizeof "Authentication OK")
N_("Invalid client credential")
"\0"
#define AUTH_REJECTEDCRED_IDX (AUTH_BADCRED_IDX \
+ sizeof "Invalid client credential")
N_("Server rejected credential")
"\0"
#define AUTH_BADVERF_IDX (AUTH_REJECTEDCRED_IDX \
+ sizeof "Server rejected credential")
N_("Invalid client verifier")
"\0"
#define AUTH_REJECTEDVERF_IDX (AUTH_BADVERF_IDX \
+ sizeof "Invalid client verifier")
N_("Server rejected verifier")
"\0"
#define AUTH_TOOWEAK_IDX (AUTH_REJECTEDVERF_IDX \
+ sizeof "Server rejected verifier")
N_("Client credential too weak")
"\0"
#define AUTH_INVALIDRESP_IDX (AUTH_TOOWEAK_IDX \
+ sizeof "Client credential too weak")
N_("Invalid server verifier")
"\0"
#define AUTH_FAILED_IDX (AUTH_INVALIDRESP_IDX \
+ sizeof "Invalid server verifier")
N_("Failed (unspecified error)")
};
static const struct auth_errtab auth_errlist[] =
{
{ AUTH_OK, AUTH_OK_IDX },
{ AUTH_BADCRED, AUTH_BADCRED_IDX },
{ AUTH_REJECTEDCRED, AUTH_REJECTEDCRED_IDX },
{ AUTH_BADVERF, AUTH_BADVERF_IDX },
{ AUTH_REJECTEDVERF, AUTH_REJECTEDVERF_IDX },
{ AUTH_TOOWEAK, AUTH_TOOWEAK_IDX },
{ AUTH_INVALIDRESP, AUTH_INVALIDRESP_IDX },
{ AUTH_FAILED, AUTH_FAILED_IDX }
};
static char *
auth_errmsg (enum auth_stat stat)
{
size_t i;
for (i = 0; i < sizeof (auth_errlist) / sizeof (struct auth_errtab); i++)
{
if (auth_errlist[i].status == stat)
{
return _(auth_errstr + auth_errlist[i].message_off);
}
}
return NULL;
}
void
__rpc_freemem (void)
{
free (buf);
}
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