File: netcfg.c

package info (click to toggle)
netcfg 1.160
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 3,532 kB
  • sloc: ansic: 5,361; sh: 183; makefile: 77
file content (357 lines) | stat: -rw-r--r-- 11,856 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
/*
   netcfg.c - Configure a network via DHCP or manual configuration
   for debian-installer

   Copyright (C) 2000-2002  David Kimdon <dwhedon@debian.org>
                            and others (see debian/copyright)

   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 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, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

*/

#include "netcfg.h"
#include "nm-conf.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <cdebconf/debconfclient.h>
#include <debian-installer.h>
#ifdef WIRELESS
#include <iwlib.h>
#endif

static method_t netcfg_method = DHCP;

response_t netcfg_get_method(struct debconfclient *client)
{
    int iret;

    iret = debconf_input(client, "medium", "netcfg/use_autoconfig");

    if (debconf_go(client) == CMD_GOBACK)
        return GO_BACK;

    debconf_get(client, "netcfg/use_autoconfig");

    if (strcmp(client->value, "true") == 0)
        netcfg_method = DHCP;
    else
        netcfg_method = STATIC;

    if (iret == CMD_INPUTINVISIBLE)
        return NOT_ASKED;

    return 0;
}

int main(int argc, char *argv[])
{
    int num_interfaces = 0;
    enum { BACKUP,
           GET_INTERFACE,
           GET_HOSTNAME_ONLY,
           GET_METHOD,
           GET_DHCP,
           GET_STATIC,
           WCONFIG,
           WCONFIG_ESSID,
           WCONFIG_SECURITY_TYPE,
           WCONFIG_WEP,
           WCONFIG_WPA,
           START_WPA,
           QUIT } state = GET_INTERFACE;

    static struct debconfclient *client;
    static int requested_wireless_tools = 0;
    char **ifaces;
    char *defiface = NULL, *defwireless = NULL;
    response_t res;
    struct netcfg_interface interface;
#ifdef NM
    struct nm_config_info nmconf;
#endif

    /* initialize libd-i */
    di_system_init("netcfg");
    netcfg_interface_init(&interface);

    if (strcmp(basename(argv[0]), "ptom") != 0)
        di_info("Starting netcfg v.%s", NETCFG_VERSION);

    parse_args (argc, argv);
    reap_old_files ();
    open_sockets();

    /* initialize debconf */
    client = debconfclient_new();
    debconf_capb(client, "backup");

    /* Check to see if netcfg should be run at all */
    debconf_get(client, "netcfg/enable");
    if (!strcmp(client->value, "false")) {
        netcfg_get_hostname(client, "netcfg/get_hostname", hostname, 0);
        netcfg_write_common("", hostname, NULL);
        return 0;
    }

    /* always always always default back to autoconfig, unless you've specified
     * disable_autoconfig on the command line. */
    debconf_get(client, "netcfg/disable_autoconfig");

    if (!strcmp(client->value, "true"))
        debconf_set(client, "netcfg/use_autoconfig", "false");
    else
        debconf_set(client, "netcfg/use_autoconfig", "true");

    /* also support disable_dhcp for compatibility */
    debconf_get(client, "netcfg/disable_dhcp");

    if (!strcmp(client->value, "true"))
        debconf_set(client, "netcfg/use_autoconfig", "false");

    for (;;) {
        switch(state) {
        case BACKUP:
            return RETURN_TO_MAIN;
        case GET_INTERFACE:
            /* If we have returned from outside of netcfg and want to
             * reconfigure networking, check to see if wpasupplicant is
             * running, and kill it if it is. If left running when
             * the interfaces are taken up and down, it appears to
             * leave it in an inconsistant state */
            kill_wpa_supplicant();

            /* Choose a default by looking for link */
            if (get_all_ifs(1, &ifaces) > 1) {
                while (*ifaces) {
                    struct netcfg_interface link_interface;

                    if (check_kill_switch(*ifaces)) {
                        debconf_subst(client, "netcfg/kill_switch_enabled", "iface", *ifaces);
                        debconf_input(client, "high", "netcfg/kill_switch_enabled");
                        if (debconf_go(client) == CMD_GOBACK) {
                            state = BACKUP;
                            break;
                        }
                        /* Is it still enabled? */
                        if (check_kill_switch(*ifaces)) {
                            ifaces++;
                            continue;
                        }
                    }

                    interface_up(*ifaces);

                    netcfg_interface_init(&link_interface);
                    link_interface.name = strdup(*ifaces);
                    if (netcfg_detect_link (client, &link_interface) == 1) /* CONNECTED */ {
                        /* CONNECTED */
                        di_info("found link on interface %s, making it the default.", *ifaces);
                        defiface = strdup(*ifaces);
                        free(link_interface.name);
                        break;
                    } else {
#ifdef WIRELESS
                        struct wireless_config wc;
#endif /* WIRELESS */
                        di_info("found no link on interface %s.", *ifaces);
#ifdef WIRELESS
                        if (iw_get_basic_config(wfd, *ifaces, &wc) == 0) {
                            wc.essid[0] = '\0';
                            wc.essid_on = 0;

                            iw_set_basic_config(wfd, *ifaces, &wc);

                            sleep(1);

                            iw_get_basic_config(wfd, *ifaces, &wc);

                            if (!empty_str(wc.essid)) {
                                di_info("%s is associated with %s. Selecting as default", *ifaces, wc.essid);
                                defiface = strdup(*ifaces);
                                interface_down(*ifaces);
                                break;
                            } else {
                                di_info("%s is not associated. Relegating to defwireless", *ifaces);
                                if (defwireless != NULL)
                                    free (defwireless);
                                defwireless = strdup(*ifaces);
                            }
                        }
                        else
                            di_info("%s is not a wireless interface. Continuing.", *ifaces);

                        interface_down(*ifaces);
#endif
                    }

                    free(link_interface.name);
                    interface_down(*ifaces);

                    ifaces++;
                }
            }

            if (state == BACKUP)
                break;

            if (!defiface && defwireless)
                defiface = defwireless;

            if(netcfg_get_interface(client, &(interface.name), &num_interfaces, defiface))
                state = BACKUP;
            else if (! interface.name || ! num_interfaces)
                state = GET_HOSTNAME_ONLY;
            else {
                if (is_wireless_iface (interface.name))
                    state = WCONFIG;
                else
                    state = GET_METHOD;
            }
            break;
        case GET_HOSTNAME_ONLY:
            if(netcfg_get_hostname(client, "netcfg/get_hostname", hostname, 0))
                state = BACKUP;
            else {
                netcfg_write_common("", hostname, NULL);
                state = QUIT;
            }
            break;
        case GET_METHOD:
            if ((res = netcfg_get_method(client)) == GO_BACK)
                state = (num_interfaces == 1) ? BACKUP : GET_INTERFACE;
            else {
                if (netcfg_method == DHCP)
                    state = GET_DHCP;
                else
                    state = GET_STATIC;
            }
            break;

        case GET_DHCP:
            switch (netcfg_activate_dhcp(client, &interface)) {
            case 0:
                state = QUIT;
                break;
            case RETURN_TO_MAIN:
                /*
                 * It doesn't make sense to go back to GET_METHOD because
                 * the user has already been asked whether they want to
                 * try an alternate method.
                 */
                state = (num_interfaces == 1) ? BACKUP : GET_INTERFACE;
                break;
            case CONFIGURE_MANUALLY:
                state = GET_STATIC;
                break;
            default:
                return 1;
            }
            break;

        case GET_STATIC:
            {
                int ret;
                /* Misnomer - this should actually take care of activation */
                if ((ret = netcfg_get_static(client, &interface)) == RETURN_TO_MAIN)
                    state = GET_INTERFACE;
                else if (ret)
                    state = GET_METHOD;
                else
                    state = QUIT;
                break;
            }

        case WCONFIG:
            if (requested_wireless_tools == 0) {
                di_exec_shell_log("apt-install iw wireless-tools");
                requested_wireless_tools = 1;
            }
            state = WCONFIG_ESSID;
            break;

        case WCONFIG_ESSID:
            if (netcfg_wireless_set_essid(client, &interface) == GO_BACK)
                state = BACKUP;
            else {
                init_wpa_supplicant_support(&interface);
                if (interface.wpa_supplicant_status == WPA_UNAVAIL)
                    state = WCONFIG_WEP;
                else
                    state = WCONFIG_SECURITY_TYPE;
            }
            break;

        case WCONFIG_SECURITY_TYPE:
            {
                int ret;
                ret = wireless_security_type(client, interface.name);
                if (ret == GO_BACK)
                    state = WCONFIG_ESSID;
                else if (ret == REPLY_WPA) {
                    state = WCONFIG_WPA;
                    interface.wifi_security = REPLY_WPA;
                }
                else {
                    state = WCONFIG_WEP;
                    interface.wifi_security = REPLY_WEP;
                }
                break;
            }

        case WCONFIG_WEP:
            if (netcfg_wireless_set_wep(client, &interface) == GO_BACK) 
                if (interface.wpa_supplicant_status == WPA_UNAVAIL)
                    state = WCONFIG_ESSID;
                else
                    state = WCONFIG_SECURITY_TYPE;
            else
                state = GET_METHOD;
            break;

        case WCONFIG_WPA:
            if (interface.wpa_supplicant_status == WPA_OK) {
                di_exec_shell_log("apt-install wpasupplicant");
                interface.wpa_supplicant_status = WPA_QUEUED;
            }

            if (netcfg_set_passphrase(client, &interface) == GO_BACK)
                state = WCONFIG_SECURITY_TYPE;
            else
                state = START_WPA;
            break;

        case START_WPA:
            if (wpa_supplicant_start(client, &interface) == GO_BACK)
                state = WCONFIG_ESSID;
            else
                state = GET_METHOD;
            break;

        case QUIT:
#ifdef NM
            if (num_interfaces > 0) {
                nm_get_configuration(&interface, &nmconf);
                nm_write_configuration(nmconf);
            }
#endif

            netcfg_update_entropy();
            return 0;
        }
    }
}