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Diffstat (limited to 'nis/nss_nis/nis-hosts.c')
-rw-r--r--nis/nss_nis/nis-hosts.c136
1 files changed, 73 insertions, 63 deletions
diff --git a/nis/nss_nis/nis-hosts.c b/nis/nss_nis/nis-hosts.c
index 58a9064f14..bde0a3291f 100644
--- a/nis/nss_nis/nis-hosts.c
+++ b/nis/nss_nis/nis-hosts.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2000, 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2000, 2002, 2003, 2006, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
@@ -131,39 +131,42 @@ internal_nis_gethostent_r (struct hostent *host, char *buffer,
int af, int flags)
{
char *domain;
- char *result;
- int len, parse_res;
- char *outkey;
- int keylen;
- struct parser_data *data = (void *) buffer;
- size_t linebuflen = buffer + buflen - data->linebuffer;
-
- if (yp_get_default_domain (&domain))
+ if (__builtin_expect (yp_get_default_domain (&domain), 0))
return NSS_STATUS_UNAVAIL;
- if (buflen < sizeof *data + 1)
+ uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
+ buffer += pad;
+
+ struct parser_data *data = (void *) buffer;
+ if (__builtin_expect (buflen < sizeof *data + 1 + pad, 0))
{
*errnop = ERANGE;
*h_errnop = NETDB_INTERNAL;
return NSS_STATUS_TRYAGAIN;
}
+ buflen -= pad;
/* Get the next entry until we found a correct one. */
+ const size_t linebuflen = buffer + buflen - data->linebuffer;
+ int parse_res;
do
{
- enum nss_status retval;
- char *p;
-
+ char *result;
+ int len;
+ char *outkey;
+ int keylen;
+ int yperr;
if (new_start)
- retval = yperr2nss (yp_first (domain, "hosts.byname",
- &outkey, &keylen, &result, &len));
+ yperr = yp_first (domain, "hosts.byname", &outkey, &keylen, &result,
+ &len);
else
- retval = yperr2nss ( yp_next (domain, "hosts.byname",
- oldkey, oldkeylen,
- &outkey, &keylen, &result, &len));
+ yperr = yp_next (domain, "hosts.byname", oldkey, oldkeylen, &outkey,
+ &keylen, &result, &len);
- if (retval != NSS_STATUS_SUCCESS)
+ if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
{
+ enum nss_status retval = yperr2nss (yperr);
+
switch (retval)
{
case NSS_STATUS_TRYAGAIN:
@@ -180,7 +183,7 @@ internal_nis_gethostent_r (struct hostent *host, char *buffer,
return retval;
}
- if ((size_t) (len + 1) > linebuflen)
+ if (__builtin_expect ((size_t) (len + 1) > linebuflen, 0))
{
free (result);
*h_errnop = NETDB_INTERNAL;
@@ -188,14 +191,14 @@ internal_nis_gethostent_r (struct hostent *host, char *buffer,
return NSS_STATUS_TRYAGAIN;
}
- p = strncpy (data->linebuffer, result, len);
+ char *p = strncpy (data->linebuffer, result, len);
data->linebuffer[len] = '\0';
while (isspace (*p))
++p;
free (result);
parse_res = parse_line (p, host, data, buflen, errnop, af, flags);
- if (parse_res == -1)
+ if (__builtin_expect (parse_res == -1, 0))
{
free (outkey);
*h_errnop = NETDB_INTERNAL;
@@ -235,11 +238,10 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
char *buffer, size_t buflen, int *errnop,
int *h_errnop, int flags)
{
- enum nss_status retval;
- char *domain, *result, *p;
- int len, parse_res;
+ uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
+ buffer += pad;
+
struct parser_data *data = (void *) buffer;
- size_t linebuflen = buffer + buflen - data->linebuffer;
if (name == NULL)
{
@@ -247,33 +249,35 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
return NSS_STATUS_UNAVAIL;
}
+ char *domain;
if (yp_get_default_domain (&domain))
return NSS_STATUS_UNAVAIL;
- if (buflen < sizeof *data + 1)
+ if (buflen < sizeof *data + 1 + pad)
{
*h_errnop = NETDB_INTERNAL;
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
- else
- {
- /* Convert name to lowercase. */
- size_t namlen = strlen (name);
- char name2[namlen + 1];
- size_t i;
+ buflen -= pad;
- for (i = 0; i < namlen; ++i)
- name2[i] = tolower (name[i]);
- name2[i] = '\0';
+ /* Convert name to lowercase. */
+ size_t namlen = strlen (name);
+ char name2[namlen + 1];
+ size_t i;
- retval = yperr2nss (yp_match (domain, "hosts.byname", name2,
- namlen, &result, &len));
+ for (i = 0; i < namlen; ++i)
+ name2[i] = tolower (name[i]);
+ name2[i] = '\0';
- }
+ char *result;
+ int len;
+ int yperr = yp_match (domain, "hosts.byname", name2, namlen, &result, &len);
- if (retval != NSS_STATUS_SUCCESS)
+ if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
{
+ enum nss_status retval = yperr2nss (yperr);
+
if (retval == NSS_STATUS_TRYAGAIN)
{
*h_errnop = TRY_AGAIN;
@@ -284,7 +288,8 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
return retval;
}
- if ((size_t) (len + 1) > linebuflen)
+ const size_t linebuflen = buffer + buflen - data->linebuffer;
+ if (__builtin_expect ((size_t) (len + 1) > linebuflen, 0))
{
free (result);
*h_errnop = NETDB_INTERNAL;
@@ -292,15 +297,15 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
return NSS_STATUS_TRYAGAIN;
}
- p = strncpy (data->linebuffer, result, len);
+ char *p = strncpy (data->linebuffer, result, len);
data->linebuffer[len] = '\0';
while (isspace (*p))
++p;
free (result);
- parse_res = parse_line (p, host, data, buflen, errnop, af, flags);
+ int parse_res = parse_line (p, host, data, buflen, errnop, af, flags);
- if (parse_res < 1 || host->h_addrtype != af)
+ if (__builtin_expect (parse_res < 1 || host->h_addrtype != af, 0))
{
if (parse_res == -1)
{
@@ -351,42 +356,46 @@ _nss_nis_gethostbyaddr_r (const void *addr, socklen_t addrlen, int af,
struct hostent *host, char *buffer, size_t buflen,
int *errnop, int *h_errnop)
{
- enum nss_status retval;
- char *domain, *result, *p;
- int len, parse_res;
- char *buf;
- struct parser_data *data = (void *) buffer;
- size_t linebuflen = buffer + buflen - data->linebuffer;
-
- if (yp_get_default_domain (&domain))
+ char *domain;
+ if (__builtin_expect (yp_get_default_domain (&domain), 0))
return NSS_STATUS_UNAVAIL;
- if (buflen < sizeof *data + 1)
+ uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
+ buffer += pad;
+
+ struct parser_data *data = (void *) buffer;
+ if (__builtin_expect (buflen < sizeof *data + 1 + pad, 0))
{
*errnop = ERANGE;
*h_errnop = NETDB_INTERNAL;
return NSS_STATUS_TRYAGAIN;
}
+ buflen -= pad;
- buf = inet_ntoa (*(const struct in_addr *) addr);
+ char *buf = inet_ntoa (*(const struct in_addr *) addr);
- retval = yperr2nss (yp_match (domain, "hosts.byaddr", buf,
- strlen (buf), &result, &len));
+ char *result;
+ int len;
+ int yperr = yp_match (domain, "hosts.byaddr", buf, strlen (buf), &result,
+ &len);
- if (retval != NSS_STATUS_SUCCESS)
+ if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
{
+ enum nss_status retval = yperr2nss (yperr);
+
if (retval == NSS_STATUS_TRYAGAIN)
{
*h_errnop = TRY_AGAIN;
*errnop = errno;
}
- if (retval == NSS_STATUS_NOTFOUND)
+ else if (retval == NSS_STATUS_NOTFOUND)
*h_errnop = HOST_NOT_FOUND;
return retval;
}
- if ((size_t) (len + 1) > linebuflen)
+ const size_t linebuflen = buffer + buflen - data->linebuffer;
+ if (__builtin_expect ((size_t) (len + 1) > linebuflen, 0))
{
free (result);
*errnop = ERANGE;
@@ -394,15 +403,16 @@ _nss_nis_gethostbyaddr_r (const void *addr, socklen_t addrlen, int af,
return NSS_STATUS_TRYAGAIN;
}
- p = strncpy (data->linebuffer, result, len);
+ char *p = strncpy (data->linebuffer, result, len);
data->linebuffer[len] = '\0';
while (isspace (*p))
++p;
free (result);
- parse_res = parse_line (p, host, data, buflen, errnop, af,
- ((_res.options & RES_USE_INET6) ? AI_V4MAPPED : 0));
- if (parse_res < 1)
+ int parse_res = parse_line (p, host, data, buflen, errnop, af,
+ ((_res.options & RES_USE_INET6)
+ ? AI_V4MAPPED : 0));
+ if (__builtin_expect (parse_res < 1, 0))
{
if (parse_res == -1)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 17:48:41 +0000