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/* mongo-utils.c - libmongo-client utility functions
* Copyright 2011, 2012 Gergely Nagy <algernon@balabit.hu>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/** @file src/mongo-utils.c
* Implementation for various libmongo-client helper functions.
*/
#include <glib.h>
#include <glib/gprintf.h>
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
static guint32 machine_id = 0;
static gint16 pid = 0;
void
mongo_util_oid_init (gint32 mid)
{
pid_t p = getpid ();
if (mid == 0)
{
srand (time (NULL));
machine_id = rand ();
}
else
machine_id = mid;
/*
* If our pid has more than 16 bits, let half the bits modulate the
* machine_id.
*/
if (sizeof (pid_t) > 2)
{
machine_id ^= pid >> 16;
}
pid = (gint16)p;
}
guint8 *
mongo_util_oid_new_with_time (gint32 ts, gint32 seq)
{
guint8 *oid;
gint32 t = GINT32_TO_BE (ts);
gint32 tmp = GINT32_TO_BE (seq);
if (machine_id == 0 || pid == 0)
return NULL;
oid = (guint8 *)g_new0 (guint8, 12);
/* Sequence number, last 3 bytes
* For simplicity's sake, we put this in first, and overwrite the
* first byte later.
*/
memcpy (oid + 4 + 2 + 2, &tmp, 4);
/* First four bytes: the time, BE byte order */
memcpy (oid, &t, 4);
/* Machine ID, byte order doesn't matter, 3 bytes */
memcpy (oid + 4, &machine_id, 3);
/* PID, byte order doesn't matter, 2 bytes */
memcpy (oid + 4 + 3, &pid, 2);
return oid;
}
guint8 *
mongo_util_oid_new (gint32 seq)
{
return mongo_util_oid_new_with_time (time (NULL), seq);
}
gchar *
mongo_util_oid_as_string (const guint8 *oid)
{
gchar *str;
gint j;
if (!oid)
return NULL;
str = g_new (gchar, 26);
for (j = 0; j < 12; j++)
g_sprintf (&str[j * 2], "%02x", oid[j]);
str[25] = 0;
return str;
}
gboolean
mongo_util_parse_addr (const gchar *addr, gchar **host, gint *port)
{
gchar *port_s, *ep;
glong p;
if (!addr || !host || !port)
{
if (host)
*host = NULL;
if (port)
*port = -1;
errno = EINVAL;
return FALSE;
}
/* Check for IPv6 literal */
if (addr[0] == '[')
{
/* Host is everything between [] */
port_s = strchr (addr + 1, ']');
if (!port_s || port_s - addr == 1)
{
*host = NULL;
*port = -1;
errno = EINVAL;
return FALSE;
}
*host = g_strndup (addr + 1, port_s - addr - 1);
port_s += 2;
if (port_s - addr >= (glong)strlen (addr))
return TRUE;
}
else
{
/* Dealing with something that's not an IPv6 literal */
/* Split up to host:port */
port_s = g_strrstr (addr, ":");
if (!port_s)
{
*host = g_strdup (addr);
return TRUE;
}
if (port_s == addr)
{
*host = NULL;
*port = -1;
errno = EINVAL;
return FALSE;
}
port_s++;
*host = g_strndup (addr, port_s - addr - 1);
}
p = strtol (port_s, &ep, 10);
if (p == LONG_MIN || p == LONG_MAX)
{
g_free (*host);
*host = NULL;
*port = -1;
errno = ERANGE;
return FALSE;
}
if (p < 0 || p > INT_MAX)
{
g_free (*host);
*host = NULL;
*port = -1;
errno = ERANGE;
return FALSE;
}
*port = (gint)p;
if (ep && *ep)
{
g_free (*host);
*host = NULL;
*port = -1;
errno = EINVAL;
return FALSE;
}
return TRUE;
}
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