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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/*
* 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 2, 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2011 Red Hat, Inc.
*/
#include <config.h>
#include <glib.h>
#include <glib/gi18n.h>
#include <string.h>
#include <ctype.h>
#include "nm-dhcp-dhclient-utils.h"
#define CLIENTID_TAG "send dhcp-client-identifier"
#define CLIENTID_FORMAT CLIENTID_TAG " \"%s\"; # added by NetworkManager"
#define CLIENTID_FORMAT_OCTETS CLIENTID_TAG " %s; # added by NetworkManager"
#define HOSTNAME_TAG "send host-name"
#define HOSTNAME_FORMAT HOSTNAME_TAG " \"%s\"; # added by NetworkManager"
#define ALSOREQ_TAG "also request "
static void
add_also_request (GPtrArray *array, const char *item)
{
int i;
for (i = 0; i < array->len; i++) {
if (!strcmp (g_ptr_array_index (array, i), item))
return;
}
g_ptr_array_add (array, g_strdup (item));
}
char *
nm_dhcp_dhclient_create_config (const char *interface,
NMSettingIP4Config *s_ip4,
guint8 *anycast_addr,
const char *hostname,
const char *orig_path,
const char *orig_contents)
{
GString *new_contents;
GPtrArray *alsoreq;
int i;
new_contents = g_string_new (_("# Created by NetworkManager\n"));
alsoreq = g_ptr_array_sized_new (5);
if (orig_contents) {
char **lines, **line;
gboolean in_alsoreq = FALSE;
g_string_append_printf (new_contents, _("# Merged from %s\n\n"), orig_path);
lines = g_strsplit_set (orig_contents, "\n\r", 0);
for (line = lines; lines && *line; line++) {
char *p = *line;
if (!strlen (g_strstrip (p)))
continue;
/* Override config file "dhcp-client-id" and use one from the
* connection.
*/
if ( s_ip4
&& nm_setting_ip4_config_get_dhcp_client_id (s_ip4)
&& !strncmp (p, CLIENTID_TAG, strlen (CLIENTID_TAG)))
continue;
/* Override config file hostname and use one from the connection */
if (hostname && !strncmp (p, HOSTNAME_TAG, strlen (HOSTNAME_TAG)))
continue;
/* Check for "also require" */
if (!strncmp (p, ALSOREQ_TAG, strlen (ALSOREQ_TAG))) {
in_alsoreq = TRUE;
p += strlen (ALSOREQ_TAG);
}
if (in_alsoreq) {
char **areq, **aiter;
/* Grab each 'also require' option and save for later */
areq = g_strsplit_set (p, "\t ,", -1);
for (aiter = areq; aiter && *aiter; aiter++) {
if (!strlen (g_strstrip (*aiter)))
continue;
if (*aiter[0] == ';') {
/* all done */
in_alsoreq = FALSE;
break;
}
if (!isalnum ((*aiter)[0]))
continue;
if ((*aiter)[strlen (*aiter) - 1] == ';') {
/* Remove the EOL marker */
(*aiter)[strlen (*aiter) - 1] = '\0';
in_alsoreq = FALSE;
}
add_also_request (alsoreq, *aiter);
}
if (areq)
g_strfreev (areq);
continue;
}
/* Existing configuration line is OK, add it to new configuration */
g_string_append (new_contents, *line);
g_string_append_c (new_contents, '\n');
}
if (lines)
g_strfreev (lines);
} else
g_string_append_c (new_contents, '\n');
/* Add NM options from connection */
if (s_ip4) {
const char *tmp;
gboolean added = FALSE;
tmp = nm_setting_ip4_config_get_dhcp_client_id (s_ip4);
if (tmp) {
gboolean is_octets = TRUE;
const char *p = tmp;
while (*p) {
if (!isxdigit (*p) && (*p != ':')) {
is_octets = FALSE;
break;
}
p++;
}
/* If the client ID is just hex digits and : then don't use quotes,
* because dhclient expects either a quoted ASCII string, or a byte
* array formated as hex octets separated by :
*/
if (is_octets)
g_string_append_printf (new_contents, CLIENTID_FORMAT_OCTETS "\n", tmp);
else
g_string_append_printf (new_contents, CLIENTID_FORMAT "\n", tmp);
added = TRUE;
}
if (hostname) {
char *plain_hostname, *dot;
plain_hostname = g_strdup (hostname);
dot = strchr (plain_hostname, '.');
/* get rid of the domain */
if (dot)
*dot = '\0';
g_string_append_printf (new_contents, HOSTNAME_FORMAT "\n", plain_hostname);
added = TRUE;
g_free (plain_hostname);
}
if (added)
g_string_append_c (new_contents, '\n');
}
/* Define options for classless static routes */
g_string_append (new_contents,
"option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;\n");
g_string_append (new_contents,
"option ms-classless-static-routes code 249 = array of unsigned integer 8;\n");
/* Web Proxy Auto-Discovery option (bgo #368423) */
g_string_append (new_contents, "option wpad code 252 = string;\n");
g_string_append_c (new_contents, '\n');
/* Everything we want to request from the DHCP server */
add_also_request (alsoreq, "rfc3442-classless-static-routes");
add_also_request (alsoreq, "ms-classless-static-routes");
add_also_request (alsoreq, "wpad");
add_also_request (alsoreq, "ntp-servers");
/* And add it to the dhclient configuration */
for (i = 0; i < alsoreq->len; i++) {
char *t = g_ptr_array_index (alsoreq, i);
g_string_append_printf (new_contents, "also request %s;\n", t);
g_free (t);
}
g_ptr_array_free (alsoreq, TRUE);
g_string_append_c (new_contents, '\n');
if (anycast_addr) {
g_string_append_printf (new_contents, "interface \"%s\" {\n"
" initial-interval 1; \n"
" anycast-mac ethernet %02x:%02x:%02x:%02x:%02x:%02x;\n"
"}\n",
interface,
anycast_addr[0], anycast_addr[1],
anycast_addr[2], anycast_addr[3],
anycast_addr[4], anycast_addr[5]);
}
return g_string_free (new_contents, FALSE);
}
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