summaryrefslogtreecommitdiff
path: root/src/network/networkctl.c
blob: b374121fbc8d80cbe84beb2a5f33b6da417c2331 (plain)
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
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
  This file is part of systemd.

  Copyright 2014 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <stdbool.h>
#include <getopt.h>

#include "sd-network.h"
#include "sd-rtnl.h"
#include "libudev.h"

#include "build.h"
#include "util.h"
#include "pager.h"
#include "rtnl-util.h"
#include "udev-util.h"
#include "arphrd-list.h"
#include "local-addresses.h"
#include "socket-util.h"

static bool arg_no_pager = false;
static bool arg_legend = true;
static bool arg_all = false;

static void pager_open_if_enabled(void) {

        if (arg_no_pager)
                return;

        pager_open(false);
}

static int link_get_type_string(int iftype, struct udev_device *d, char **ret) {
        const char *t;
        char *p;

        if (iftype == ARPHRD_ETHER && d) {
                const char *devtype, *id = NULL;
                /* WLANs have iftype ARPHRD_ETHER, but we want
                 * to show a more useful type string for
                 * them */

                devtype = udev_device_get_devtype(d);
                if (streq_ptr(devtype, "wlan"))
                        id = "wlan";
                else if (streq_ptr(devtype, "wwan"))
                        id = "wwan";

                if (id) {
                        p = strdup(id);
                        if (!p)
                                return -ENOMEM;

                        *ret = p;
                        return 1;
                }
        }

        t = arphrd_to_name(iftype);
        if (!t) {
                *ret = NULL;
                return 0;
        }

        p = strdup(t);
        if (!p)
                return -ENOMEM;

        ascii_strlower(p);
        *ret = p;

        return 0;
}

typedef struct LinkInfo {
        const char *name;
        int ifindex;
        unsigned iftype;
} LinkInfo;

static int link_info_compare(const void *a, const void *b) {
        const LinkInfo *x = a, *y = b;

        return x->ifindex - y->ifindex;
}

static int decode_and_sort_links(sd_rtnl_message *m, LinkInfo **ret) {
        _cleanup_free_ LinkInfo *links = NULL;
        size_t size = 0, c = 0;
        sd_rtnl_message *i;
        int r;

        for (i = m; i; i = sd_rtnl_message_next(i)) {
                const char *name;
                unsigned iftype;
                uint16_t type;
                int ifindex;

                r = sd_rtnl_message_get_type(i, &type);
                if (r < 0)
                        return r;

                if (type != RTM_NEWLINK)
                        continue;

                r = sd_rtnl_message_link_get_ifindex(i, &ifindex);
                if (r < 0)
                        return r;

                r = sd_rtnl_message_read_string(i, IFLA_IFNAME, &name);
                if (r < 0)
                        return r;

                r = sd_rtnl_message_link_get_type(i, &iftype);
                if (r < 0)
                        return r;

                if (!GREEDY_REALLOC(links, size, c+1))
                        return -ENOMEM;

                links[c].name = name;
                links[c].ifindex = ifindex;
                links[c].iftype = iftype;
                c++;
        }

        qsort_safe(links, c, sizeof(LinkInfo), link_info_compare);

        *ret = links;
        links = NULL;

        return (int) c;
}

static void operational_state_to_color(const char *state, const char **on, const char **off) {
        assert(on);
        assert(off);

        if (streq_ptr(state, "routable")) {
                *on = ansi_highlight_green();
                *off = ansi_highlight_off();
        } else if (streq_ptr(state, "degraded")) {
                *on = ansi_highlight_yellow();
                *off = ansi_highlight_off();
        } else
                *on = *off = "";
}

static void setup_state_to_color(const char *state, const char **on, const char **off) {
        assert(on);
        assert(off);

        if (streq_ptr(state, "configured")) {
                *on = ansi_highlight_green();
                *off = ansi_highlight_off();
        } else if (streq_ptr(state, "configuring")) {
                *on = ansi_highlight_yellow();
                *off = ansi_highlight_off();
        } else if (streq_ptr(state, "failed") || streq_ptr(state, "linger")) {
                *on = ansi_highlight_red();
                *off = ansi_highlight_off();
        } else
                *on = *off = "";
}

static int list_links(char **args, unsigned n) {
        _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
        _cleanup_udev_unref_ struct udev *udev = NULL;
        _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
        _cleanup_free_ LinkInfo *links = NULL;
        int r, c, i;

        pager_open_if_enabled();

        r = sd_rtnl_open(&rtnl, 0);
        if (r < 0) {
                log_error("Failed to connect to netlink: %s", strerror(-r));
                return r;
        }

        udev = udev_new();
        if (!udev) {
                log_error("Failed to connect to udev: %m");
                return -errno;
        }

        r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
        if (r < 0)
                return rtnl_log_create_error(r);

        r = sd_rtnl_message_request_dump(req, true);
        if (r < 0)
                return rtnl_log_create_error(r);

        r = sd_rtnl_call(rtnl, req, 0, &reply);
        if (r < 0) {
                log_error("Failed to enumerate links: %s", strerror(-r));
                return r;
        }

        if (arg_legend)
                printf("%3s %-16s %-18s %-11s %-10s\n", "IDX", "LINK", "TYPE", "OPERATIONAL", "SETUP");

        c = decode_and_sort_links(reply, &links);
        if (c < 0)
                return rtnl_log_parse_error(c);

        for (i = 0; i < c; i++) {
                _cleanup_free_ char *setup_state = NULL, *operational_state = NULL;
                _cleanup_udev_device_unref_ struct udev_device *d = NULL;
                const char *on_color_operational, *off_color_operational,
                           *on_color_setup, *off_color_setup;
                 char devid[2 + DECIMAL_STR_MAX(int)];
                _cleanup_free_ char *t = NULL;

                sd_network_link_get_operational_state(links[i].ifindex, &operational_state);
                operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);

                sd_network_link_get_setup_state(links[i].ifindex, &setup_state);
                setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);

                sprintf(devid, "n%i", links[i].ifindex);
                d = udev_device_new_from_device_id(udev, devid);

                link_get_type_string(links[i].iftype, d, &t);

                printf("%3i %-16s %-18s %s%-11s%s %s%-10s%s\n",
                       links[i].ifindex, links[i].name, strna(t),
                       on_color_operational, strna(operational_state), off_color_operational,
                       on_color_setup, strna(setup_state), off_color_setup);
        }

        if (arg_legend)
                printf("\n%i links listed.\n", c);

        return 0;
}

static int dump_addresses(sd_rtnl *rtnl, const char *prefix, int ifindex) {
        _cleanup_free_ struct local_address *local = NULL;
        int r, n, i;

        n = local_addresses(rtnl, ifindex, &local);
        if (n < 0)
                return n;

        for (i = 0; i < n; i++) {
                _cleanup_free_ char *pretty = NULL;

                r = in_addr_to_string(local[i].family, &local[i].address, &pretty);
                if (r < 0)
                        return r;

                printf("%*s%s\n",
                       (int) strlen(prefix),
                       i == 0 ? prefix : "",
                       pretty);
        }

        return 0;
}

static void dump_list(const char *prefix, char **l) {
        char **i;

        STRV_FOREACH(i, l) {
                printf("%*s%s\n",
                       (int) strlen(prefix),
                       i == l ? prefix : "",
                       *i);
        }
}

static int link_status_one(sd_rtnl *rtnl, struct udev *udev, const char *name) {
        _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **domains = NULL;
        _cleanup_free_ char *setup_state = NULL, *operational_state = NULL;
        _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
        _cleanup_udev_device_unref_ struct udev_device *d = NULL;
        char devid[2 + DECIMAL_STR_MAX(int)];
        _cleanup_free_ char *t = NULL, *network = NULL;
        const char *driver = NULL, *path = NULL, *vendor = NULL, *model = NULL, *link = NULL;
        const char *on_color_operational, *off_color_operational,
                   *on_color_setup, *off_color_setup;
        struct ether_addr e;
        unsigned iftype;
        int r, ifindex;
        bool have_mac;
        uint32_t mtu;

        assert(rtnl);
        assert(udev);
        assert(name);

        if (safe_atoi(name, &ifindex) >= 0 && ifindex > 0)
                r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, ifindex);
        else {
                r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
                if (r < 0)
                        return rtnl_log_create_error(r);

                r = sd_rtnl_message_append_string(req, IFLA_IFNAME, name);
        }

        if (r < 0)
                return rtnl_log_create_error(r);

        r = sd_rtnl_call(rtnl, req, 0, &reply);
        if (r < 0) {
                log_error("Failed to query link: %s", strerror(-r));
                return r;
        }

        r = sd_rtnl_message_link_get_ifindex(reply, &ifindex);
        if (r < 0)
                return rtnl_log_parse_error(r);

        r = sd_rtnl_message_read_string(reply, IFLA_IFNAME, &name);
        if (r < 0)
                return rtnl_log_parse_error(r);

        r = sd_rtnl_message_link_get_type(reply, &iftype);
        if (r < 0)
                return rtnl_log_parse_error(r);

        have_mac = sd_rtnl_message_read_ether_addr(reply, IFLA_ADDRESS, &e) >= 0;

        if (have_mac) {
                const uint8_t *p;
                bool all_zeroes = true;

                for (p = (uint8_t*) &e; p < (uint8_t*) &e + sizeof(e); p++)
                        if (*p != 0) {
                                all_zeroes = false;
                                break;
                        }

                if (all_zeroes)
                        have_mac = false;
        }

        sd_rtnl_message_read_u32(reply, IFLA_MTU, &mtu);

        sd_network_link_get_operational_state(ifindex, &operational_state);
        operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);

        sd_network_link_get_setup_state(ifindex, &setup_state);
        setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);

        sd_network_link_get_dns(ifindex, &dns);
        sd_network_link_get_ntp(ifindex, &ntp);
        sd_network_link_get_domains(ifindex, &domains);
        r = sd_network_link_get_wildcard_domain(ifindex);
        if (r > 0) {
                char *wildcard;

                wildcard = strdup("*");
                if (!wildcard)
                        return log_oom();

                if (strv_consume(&domains, wildcard) < 0)
                        return log_oom();
        }

        sprintf(devid, "n%i", ifindex);
        d = udev_device_new_from_device_id(udev, devid);

        link_get_type_string(iftype, d, &t);

        if (d) {
                link = udev_device_get_property_value(d, "ID_NET_LINK_FILE");
                driver = udev_device_get_property_value(d, "ID_NET_DRIVER");
                path = udev_device_get_property_value(d, "ID_PATH");

                vendor = udev_device_get_property_value(d, "ID_VENDOR_FROM_DATABASE");
                if (!vendor)
                        vendor = udev_device_get_property_value(d, "ID_VENDOR");

                model = udev_device_get_property_value(d, "ID_MODEL_FROM_DATABASE");
                if (!model)
                        model = udev_device_get_property_value(d, "ID_MODEL");
        }

        sd_network_link_get_network_file(ifindex, &network);

        printf("%s%s%s %i: %s\n", on_color_operational, draw_special_char(DRAW_BLACK_CIRCLE), off_color_operational, ifindex, name);

        printf("   Link File: %s\n"
               "Network File: %s\n"
               "        Type: %s\n"
               "       State: %s%s%s (%s%s%s)\n",
               strna(link),
               strna(network),
               strna(t),
               on_color_operational, strna(operational_state), off_color_operational,
               on_color_setup, strna(setup_state), off_color_setup);

        if (path)
                printf("        Path: %s\n", path);
        if (driver)
                printf("      Driver: %s\n", driver);
        if (vendor)
                printf("      Vendor: %s\n", vendor);
        if (model)
                printf("       Model: %s\n", model);

        if (have_mac) {
                char ea[ETHER_ADDR_TO_STRING_MAX];
                printf("  HW Address: %s\n", ether_addr_to_string(&e, ea));
        }

        if (mtu > 0)
                printf("         MTU: %u\n", mtu);

        dump_addresses(rtnl, "     Address: ", ifindex);

        if (!strv_isempty(dns))
                dump_list("         DNS: ", dns);
        if (!strv_isempty(domains))
                dump_list("      Domain: ", domains);
        if (!strv_isempty(ntp))
                dump_list("         NTP: ", ntp);

        return 0;
}

static int link_status(char **args, unsigned n) {
        _cleanup_udev_unref_ struct udev *udev = NULL;
        _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
        char **name;
        int r;

        r = sd_rtnl_open(&rtnl, 0);
        if (r < 0) {
                log_error("Failed to connect to netlink: %s", strerror(-r));
                return r;
        }

        udev = udev_new();
        if (!udev) {
                log_error("Failed to connect to udev: %m");
                return -errno;
        }

        if (n <= 1 && !arg_all) {
                _cleanup_free_ char *operational_state = NULL;
                _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **domains = NULL;
                _cleanup_free_ struct local_address *addresses = NULL;
                const char *on_color_operational, *off_color_operational;
                int i, c;

                sd_network_get_operational_state(&operational_state);
                operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);

                printf("       State: %s%s%s\n", on_color_operational, strna(operational_state), off_color_operational);

                c = local_addresses(rtnl, 0, &addresses);
                for (i = 0; i < c; i++) {
                        _cleanup_free_ char *pretty = NULL;

                        r = in_addr_to_string(addresses[i].family, &addresses[i].address, &pretty);
                        if (r < 0)
                                return log_oom();

                        printf("%13s %s\n",
                               i > 0 ? "" : "Address:", pretty);
                }

                sd_network_get_dns(&dns);
                if (!strv_isempty(dns))
                        dump_list("         DNS: ", dns);

                sd_network_get_domains(&domains);
                if (!strv_isempty(domains))
                        dump_list("      Domain: ", domains);

                sd_network_get_ntp(&ntp);
                if (!strv_isempty(ntp))
                        dump_list("         NTP: ", ntp);

                return 0;
        }

        pager_open_if_enabled();

        if (arg_all) {
                _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
                _cleanup_free_ LinkInfo *links = NULL;
                int c, i;

                r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0);
                if (r < 0)
                        return rtnl_log_create_error(r);

                r = sd_rtnl_message_request_dump(req, true);
                if (r < 0)
                        return rtnl_log_create_error(r);

                r = sd_rtnl_call(rtnl, req, 0, &reply);
                if (r < 0) {
                        log_error("Failed to enumerate links: %s", strerror(-r));
                        return r;
                }

                c = decode_and_sort_links(reply, &links);
                if (c < 0)
                        return rtnl_log_parse_error(c);

                for (i = 0; i < c; i++) {
                        if (i > 0)
                                fputc('\n', stdout);

                        link_status_one(rtnl, udev, links[i].name);
                }
        }

        STRV_FOREACH(name, args + 1) {
                if (name != args+1)
                        fputc('\n', stdout);

                link_status_one(rtnl, udev, *name);
        }

        return 0;
}

static void help(void) {
        printf("%s [OPTIONS...]\n\n"
               "Query and control the networking subsystem.\n\n"
               "  -h --help             Show this help\n"
               "     --version          Show package version\n"
               "     --no-pager         Do not pipe output into a pager\n"
               "     --no-legend        Do not show the headers and footers\n"
               "  -a --all              Show status for all links\n\n"
               "Commands:\n"
               "  list                  List links\n"
               "  status LINK           Show link status\n"
               , program_invocation_short_name);
}

static int parse_argv(int argc, char *argv[]) {

        enum {
                ARG_VERSION = 0x100,
                ARG_NO_PAGER,
                ARG_NO_LEGEND,
        };

        static const struct option options[] = {
                { "help",      no_argument,       NULL, 'h'           },
                { "version",   no_argument,       NULL, ARG_VERSION   },
                { "no-pager",  no_argument,       NULL, ARG_NO_PAGER  },
                { "no-legend", no_argument,       NULL, ARG_NO_LEGEND },
                { "all",       no_argument,       NULL, 'a'           },
                {}
        };

        int c;

        assert(argc >= 0);
        assert(argv);

        while ((c = getopt_long(argc, argv, "ha", options, NULL)) >= 0) {

                switch (c) {

                case 'h':
                        help();
                        return 0;

                case ARG_VERSION:
                        puts(PACKAGE_STRING);
                        puts(SYSTEMD_FEATURES);
                        return 0;

                case ARG_NO_PAGER:
                        arg_no_pager = true;
                        break;

                case ARG_NO_LEGEND:
                        arg_legend = false;
                        break;

                case 'a':
                        arg_all = true;
                        break;

                case '?':
                        return -EINVAL;

                default:
                        assert_not_reached("Unhandled option");
                }
        }

        return 1;
}

static int networkctl_main(int argc, char *argv[]) {

        static const struct {
                const char* verb;
                const enum {
                        MORE,
                        LESS,
                        EQUAL
                } argc_cmp;
                const int argc;
                int (* const dispatch)(char **args, unsigned n);
        } verbs[] = {
                { "list",   LESS, 1, list_links  },
                { "status", MORE, 1, link_status },
        };

        int left;
        unsigned i;

        assert(argc >= 0);
        assert(argv);

        left = argc - optind;

        if (left <= 0)
                /* Special rule: no arguments means "list" */
                i = 0;
        else {
                if (streq(argv[optind], "help")) {
                        help();
                        return 0;
                }

                for (i = 0; i < ELEMENTSOF(verbs); i++)
                        if (streq(argv[optind], verbs[i].verb))
                                break;

                if (i >= ELEMENTSOF(verbs)) {
                        log_error("Unknown operation %s", argv[optind]);
                        return -EINVAL;
                }
        }

        switch (verbs[i].argc_cmp) {

        case EQUAL:
                if (left != verbs[i].argc) {
                        log_error("Invalid number of arguments.");
                        return -EINVAL;
                }

                break;

        case MORE:
                if (left < verbs[i].argc) {
                        log_error("Too few arguments.");
                        return -EINVAL;
                }

                break;

        case LESS:
                if (left > verbs[i].argc) {
                        log_error("Too many arguments.");
                        return -EINVAL;
                }

                break;

        default:
                assert_not_reached("Unknown comparison operator.");
        }

        return verbs[i].dispatch(argv + optind, left);
}

int main(int argc, char* argv[]) {
        int r;

        log_parse_environment();
        log_open();

        r = parse_argv(argc, argv);
        if (r <= 0)
                goto finish;

        r = networkctl_main(argc, argv);

finish:
        pager_close();

        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}