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/*
SSSD
Authors:
Stephen Gallagher <sgallagh@redhat.com>
Copyright (C) 2012 Red Hat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "providers/ldap/sdap_range.h"
#include "util/util.h"
#include "util/strtonum.h"
#define SDAP_RANGE_STRING "range="
errno_t sdap_parse_range(TALLOC_CTX *mem_ctx,
const char *attr_desc,
char **base_attr,
uint32_t *range_offset,
bool disable_range_retrieval)
{
errno_t ret;
TALLOC_CTX *tmp_ctx;
char *endptr;
char *end_range;
char *base;
size_t rangestringlen = sizeof(SDAP_RANGE_STRING) - 1;
*range_offset = 0;
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) return ENOMEM;
/* The base_attr is the portion before the semicolon (if it exists) */
endptr = strchr(attr_desc, ';');
if (endptr == NULL) {
/* Not a ranged attribute. Just copy the attribute desc */
*base_attr = talloc_strdup(mem_ctx, attr_desc);
if (!*base_attr) {
ret = ENOMEM;
} else {
ret = EOK;
}
DEBUG(SSSDBG_TRACE_INTERNAL,
("No sub-attributes for [%s]\n", attr_desc));
goto done;
}
/* This is a complex attribute. First get the base attribute name */
base = talloc_strndup(tmp_ctx, attr_desc,
endptr - attr_desc);
if (!base) {
ret = ENOMEM;
goto done;
}
DEBUG(SSSDBG_TRACE_LIBS,
("Base attribute of [%s] is [%s]\n",
attr_desc, base));
/* Next, determine if this is a ranged attribute */
if (strncmp(endptr+1, SDAP_RANGE_STRING, rangestringlen) != 0) {
/* This is some other sub-attribute. We'll just return the whole
* thing in case it's dealt with elsewhere.
*/
*base_attr = talloc_strdup(mem_ctx, attr_desc);
if (!*base_attr) {
ret = ENOMEM;
} else {
ret = EOK;
}
DEBUG(SSSDBG_TRACE_LIBS,
("[%s] contains sub-attribute other than a range, returning whole\n",
attr_desc));
goto done;
} else if (disable_range_retrieval) {
/* This is range sub-attribute, but we want to ignore it.
*/
*base_attr = talloc_strdup(mem_ctx, attr_desc);
if (!*base_attr) {
ret = ENOMEM;
} else {
ret = ECANCELED;
}
goto done;
}
/* Get the end of the range */
end_range = strchr(endptr + rangestringlen +1, '-');
if (!end_range) {
ret = EINVAL;
DEBUG(SSSDBG_MINOR_FAILURE,
("Cannot find hyphen in [%s]\n",
endptr + rangestringlen +1));
goto done;
}
end_range++; /* advance past the hyphen */
if (*end_range == '*') {
/* this was the last iteration of range retrievals */
*base_attr = talloc_steal(mem_ctx, base);
*range_offset = 0;
DEBUG(SSSDBG_TRACE_LIBS,
("[%s] contained the last set of values for this attribute\n",
attr_desc));
ret = EOK;
goto done;
}
*range_offset = strtouint32(end_range, &endptr, 10);
if (*endptr != '\0') {
*range_offset = 0;
ret = errno;
DEBUG(SSSDBG_MINOR_FAILURE,
("[%s] did not parse as an unsigned integer: [%s]\n",
end_range, strerror(ret)));
goto done;
}
(*range_offset)++;
*base_attr = talloc_steal(mem_ctx, base);
DEBUG(SSSDBG_TRACE_LIBS,
("Parsed range values: [%s][%d]\n",
base, *range_offset));
ret = EAGAIN;
done:
talloc_free(tmp_ctx);
return ret;
}
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