74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <netinet/ether.h>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <net/if.h>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "sd-id128.h"

50f1e641a93cacfc693b0c3d300bee5df0c8c460Tom Gundersen

71d35b6b5563817dfbe757ab9e3b9f018b2db491Thomas Hindoe Paaboel Andersen#include "link-config.h"

322345fdb9865ef2477fba8e4bdde0e1183ef505Lennart Poettering#include "ethtool-util.h"

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering#include "libudev-private.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "sd-rtnl.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "util.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "log.h"

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering#include "strv.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "path-util.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "conf-parser.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "conf-files.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "fileio.h"

322345fdb9865ef2477fba8e4bdde0e1183ef505Lennart Poettering#include "hashmap.h"

b93312f5960b276bae915906ccde36f545bae3e0Zbigniew Jędrzejewski-Szmek#include "rtnl-util.h"

b93312f5960b276bae915906ccde36f545bae3e0Zbigniew Jędrzejewski-Szmek#include "net-util.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstruct link_config_ctx {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering LIST_HEAD(link_config, links);

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering int ethtool_fd;

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering bool enable_name_policy;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering sd_rtnl *rtnl;

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering char **link_dirs;

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering usec_t link_dirs_ts_usec;

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering};

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart PoetteringDEFINE_TRIVIAL_CLEANUP_FUNC(link_config_ctx*, link_config_ctx_free);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#define _cleanup_link_config_ctx_free_ _cleanup_(link_config_ctx_freep)

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint link_config_ctx_new(link_config_ctx **ret) {

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmek _cleanup_link_config_ctx_free_ link_config_ctx *ctx = NULL;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (!ret)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -EINVAL;

f5430a3ef308f3a102899fcaf7fbece757082f2aLennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering ctx = new0(link_config_ctx, 1);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (!ctx)

9c92ce6d67f88beb31dd6555d12ae3f632218a39Lennart Poettering return -ENOMEM;

9c92ce6d67f88beb31dd6555d12ae3f632218a39Lennart Poettering

9c92ce6d67f88beb31dd6555d12ae3f632218a39Lennart Poettering LIST_HEAD_INIT(ctx->links);

9c92ce6d67f88beb31dd6555d12ae3f632218a39Lennart Poettering

9c92ce6d67f88beb31dd6555d12ae3f632218a39Lennart Poettering ctx->ethtool_fd = -1;

9c92ce6d67f88beb31dd6555d12ae3f632218a39Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering ctx->enable_name_policy = true;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering ctx->link_dirs = strv_new("/etc/systemd/network",

8ac4e9e1e54397f6d1745c2a7a806132418c7da2Lennart Poettering "/run/systemd/network",

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering "/usr/lib/systemd/network",

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#ifdef HAVE_SPLIT_USR

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering "/lib/systemd/network",

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#endif

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering NULL);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (!ctx->link_dirs) {

2e276efc7b0398a3086629a52970bdd4ab7252f9Zbigniew Jędrzejewski-Szmek log_error("failed to build link config directory array");

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering return -ENOMEM;

c0eb11cfd016381fe02875a4ef29c1ade00c94e7Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (!path_strv_canonicalize_uniq(ctx->link_dirs)) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering log_error("failed to canonicalize link config directories\n");

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -ENOMEM;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering *ret = ctx;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering ctx = NULL;

7e8e0422aeb16f2a09a40546c61df753d10029b6Lennart Poettering

7e8e0422aeb16f2a09a40546c61df753d10029b6Lennart Poettering return 0;

7e8e0422aeb16f2a09a40546c61df753d10029b6Lennart Poettering}

7e8e0422aeb16f2a09a40546c61df753d10029b6Lennart Poettering

7e8e0422aeb16f2a09a40546c61df753d10029b6Lennart Poetteringstatic int link_config_ctx_connect(link_config_ctx *ctx) {

7e8e0422aeb16f2a09a40546c61df753d10029b6Lennart Poettering int r;

7e8e0422aeb16f2a09a40546c61df753d10029b6Lennart Poettering

7e8e0422aeb16f2a09a40546c61df753d10029b6Lennart Poettering if (ctx->ethtool_fd >= 0 && ctx->rtnl)

7e8e0422aeb16f2a09a40546c61df753d10029b6Lennart Poettering return 0;

7e8e0422aeb16f2a09a40546c61df753d10029b6Lennart Poettering

946c70944ebdf428ffeb9991a7449edbd4011461Zbigniew Jędrzejewski-Szmek r = ethtool_connect(&ctx->ethtool_fd);

946c70944ebdf428ffeb9991a7449edbd4011461Zbigniew Jędrzejewski-Szmek if (r < 0)

946c70944ebdf428ffeb9991a7449edbd4011461Zbigniew Jędrzejewski-Szmek return r;

946c70944ebdf428ffeb9991a7449edbd4011461Zbigniew Jędrzejewski-Szmek

946c70944ebdf428ffeb9991a7449edbd4011461Zbigniew Jędrzejewski-Szmek r = sd_rtnl_open(0, &ctx->rtnl);

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmek if (r < 0)

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmek return r;

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmek

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmek return 0;

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmek}

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmek

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmekstatic void link_configs_free(link_config_ctx *ctx) {

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmek link_config *link, *link_next;

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmek

0dae31d468b1a0e22d98921f7b0dbd92fd217167Zbigniew Jędrzejewski-Szmek if (!ctx)

42cc2eebb01056beb7acd3ecfe8e533558237f84Lennart Poettering return;

abf126a355e2f2b62b6c51ab3bb37895d1e3eee7Tom Gundersen

abf126a355e2f2b62b6c51ab3bb37895d1e3eee7Tom Gundersen LIST_FOREACH_SAFE(links, link, link_next, ctx->links) {

abf126a355e2f2b62b6c51ab3bb37895d1e3eee7Tom Gundersen free(link->filename);

abf126a355e2f2b62b6c51ab3bb37895d1e3eee7Tom Gundersen free(link->match_path);

abf126a355e2f2b62b6c51ab3bb37895d1e3eee7Tom Gundersen free(link->match_driver);

abf126a355e2f2b62b6c51ab3bb37895d1e3eee7Tom Gundersen free(link->match_type);

abf126a355e2f2b62b6c51ab3bb37895d1e3eee7Tom Gundersen free(link->description);

abf126a355e2f2b62b6c51ab3bb37895d1e3eee7Tom Gundersen

549c1a2564b56f2bb38f1203d59c747ea15817f3Tom Gundersen free(link);

42cc2eebb01056beb7acd3ecfe8e533558237f84Lennart Poettering }

42cc2eebb01056beb7acd3ecfe8e533558237f84Lennart Poettering}

42cc2eebb01056beb7acd3ecfe8e533558237f84Lennart Poettering

549c1a2564b56f2bb38f1203d59c747ea15817f3Tom Gundersenvoid link_config_ctx_free(link_config_ctx *ctx) {

549c1a2564b56f2bb38f1203d59c747ea15817f3Tom Gundersen if (!ctx)

42cc2eebb01056beb7acd3ecfe8e533558237f84Lennart Poettering return;

8db0d2f5c37e7e8f5bfce016cfdad7947a3ea939Zbigniew Jędrzejewski-Szmek

8db0d2f5c37e7e8f5bfce016cfdad7947a3ea939Zbigniew Jędrzejewski-Szmek if (ctx->ethtool_fd >= 0)

8db0d2f5c37e7e8f5bfce016cfdad7947a3ea939Zbigniew Jędrzejewski-Szmek close_nointr_nofail(ctx->ethtool_fd);

8db0d2f5c37e7e8f5bfce016cfdad7947a3ea939Zbigniew Jędrzejewski-Szmek

8db0d2f5c37e7e8f5bfce016cfdad7947a3ea939Zbigniew Jędrzejewski-Szmek sd_rtnl_unref(ctx->rtnl);

8db0d2f5c37e7e8f5bfce016cfdad7947a3ea939Zbigniew Jędrzejewski-Szmek

8db0d2f5c37e7e8f5bfce016cfdad7947a3ea939Zbigniew Jędrzejewski-Szmek strv_free(ctx->link_dirs);

8db0d2f5c37e7e8f5bfce016cfdad7947a3ea939Zbigniew Jędrzejewski-Szmek link_configs_free(ctx);

8db0d2f5c37e7e8f5bfce016cfdad7947a3ea939Zbigniew Jędrzejewski-Szmek

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek free(ctx);

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek return;

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek}

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmekstatic int load_link(link_config_ctx *ctx, const char *filename) {

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek link_config *link;

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek FILE *file;

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek int r;

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek file = fopen(filename, "re");

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek if (!file) {

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek if (errno == ENOENT)

151226ab4bf276d60d51864330a99f886b923697Zbigniew Jędrzejewski-Szmek return 0;

50f1e641a93cacfc693b0c3d300bee5df0c8c460Tom Gundersen else

9ead3519c54b6d1b79b35541873b5cf7c8b3a7d3Lennart Poettering return errno;

50f1e641a93cacfc693b0c3d300bee5df0c8c460Tom Gundersen }

50f1e641a93cacfc693b0c3d300bee5df0c8c460Tom Gundersen

50f1e641a93cacfc693b0c3d300bee5df0c8c460Tom Gundersen link = new0(link_config, 1);

50f1e641a93cacfc693b0c3d300bee5df0c8c460Tom Gundersen if (!link) {

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen r = log_oom();

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen goto failure;

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen }

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen link->mac_policy = _MACPOLICY_INVALID;

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen link->wol = _WOL_INVALID;

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen link->duplex = _DUP_INVALID;

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen r = config_parse(NULL, filename, file, "Match\0Link\0Ethernet\0", config_item_perf_lookup,

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen (void*) link_config_gperf_lookup, false, false, link);

5d45a8808431987c370706d365fb0cc95cf03d52Tom Gundersen if (r < 0) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering log_warning("Could not parse config file %s: %s", filename, strerror(-r));

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto failure;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering } else

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering log_debug("Parsed configuration file %s", filename);

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering link->filename = strdup(filename);

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering LIST_PREPEND(links, ctx->links, link);

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering return 0;

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poetteringfailure:

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering free(link);

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering return r;

7c1ff6ac3d9e3acae1d601d40728cf7ccc9a7730Tom Gundersen}

58db254ade4fb2ef77de68f28c4f13814819f6a1Lennart Poettering

36d9205d669bcdcb04fa730d1f3549a9fc9a9001Tom Gundersenstatic bool enable_name_policy(void) {

801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering _cleanup_free_ char *line;

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering char *w, *state;

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering int r;

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering size_t l;

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering

801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering r = proc_cmdline(&line);

801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering if (r < 0)

2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering if (r <= 0)

322345fdb9865ef2477fba8e4bdde0e1183ef505Lennart Poettering return true;

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering

8bf52d3d17d364438191077d0750b8b80b5dc53aLennart Poettering FOREACH_WORD_QUOTED(w, l, line, state)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (l == sizeof("net.ifnames=0") - 1 && strneq(w, "net.ifnames=0", l))

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return false;

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering return true;

322345fdb9865ef2477fba8e4bdde0e1183ef505Lennart Poettering}

2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering

faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poetteringint link_config_load(link_config_ctx *ctx) {

322345fdb9865ef2477fba8e4bdde0e1183ef505Lennart Poettering int r;

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering char **files, **f;

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering

2001c80560e3dae69e14fd994d3978c187af48b8Lennart Poettering link_configs_free(ctx);

322345fdb9865ef2477fba8e4bdde0e1183ef505Lennart Poettering

2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering if (!enable_name_policy()) {

d5099efc47d4e6ac60816b5381a5f607ab03f06eMichal Schmidt ctx->enable_name_policy = false;

d5099efc47d4e6ac60816b5381a5f607ab03f06eMichal Schmidt log_info("Network interface NamePolicy= disabled on kernel commandline, ignoring.");

}

/* update timestamp */

paths_check_timestamp(ctx->link_dirs, &ctx->link_dirs_ts_usec, true);

r = conf_files_list_strv(&files, ".link", NULL, (const char **)ctx->link_dirs);

if (r < 0) {

log_error("failed to enumerate link files: %s", strerror(-r));

return r;

}

STRV_FOREACH_BACKWARDS(f, files) {

r = load_link(ctx, *f);

if (r < 0)

return r;

}

return 0;

}

bool link_config_should_reload(link_config_ctx *ctx) {

return paths_check_timestamp(ctx->link_dirs, &ctx->link_dirs_ts_usec, false);

}

int link_config_get(link_config_ctx *ctx, struct udev_device *device, link_config **ret) {

link_config *link;

LIST_FOREACH(links, link, ctx->links) {

if (net_match_config(link->match_mac, link->match_path,

link->match_driver, link->match_type, NULL,

udev_device_get_sysattr_value(device, "address"),

udev_device_get_property_value(device, "ID_PATH"),

udev_device_get_driver(device),

udev_device_get_devtype(device),

NULL)) {

log_debug("Config file %s applies to device %s",

link->filename,

udev_device_get_sysname(device));

*ret = link;

return 0;

}

}

*ret = NULL;

return -ENOENT;

}

static bool mac_is_random(struct udev_device *device) {

const char *s;

unsigned type;

int r;

s = udev_device_get_sysattr_value(device, "addr_assign_type");

if (!s)

return false; /* if we don't know, assume it is not random */

r = safe_atou(s, &type);

if (r < 0)

return false;

/* check for NET_ADDR_RANDOM */

return type == 1;

}

static bool mac_is_permanent(struct udev_device *device) {

const char *s;

unsigned type;

int r;

s = udev_device_get_sysattr_value(device, "addr_assign_type");

if (!s)

return true; /* if we don't know, assume it is permanent */

r = safe_atou(s, &type);

if (r < 0)

return true;

/* check for NET_ADDR_PERM */

return type == 0;

}

static int get_mac(struct udev_device *device, bool want_random, struct ether_addr *mac) {

unsigned int seed;

int r, i;

if (want_random)

seed = random_u();

else {

const char *name;

sd_id128_t machine;

char machineid_buf[33];

const char *seed_str;

/* fetch some persistent data unique (on this machine) to this device */

name = udev_device_get_property_value(device, "ID_NET_NAME_ONBOARD");

if (!name) {

name = udev_device_get_property_value(device, "ID_NET_NAME_SLOT");

if (!name) {

name = udev_device_get_property_value(device, "ID_NET_NAME_PATH");

if (!name)

return -ENOENT;

}

}

/* fetch some persistent data unique to this machine */

r = sd_id128_get_machine(&machine);

if (r < 0)

return r;

/* combine the data */

seed_str = strappenda(name, sd_id128_to_string(machine, machineid_buf));

/* hash to get seed */

seed = string_hash_func(seed_str);

}

srandom(seed);

for(i = 0; i < ETH_ALEN; i++) {

mac->ether_addr_octet[i] = random();

}

/* see eth_random_addr in the kernel */

mac->ether_addr_octet[0] &= 0xfe; /* clear multicast bit */

mac->ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */

return 0;

}

int link_config_apply(link_config_ctx *ctx, link_config *config, struct udev_device *device, const char **name) {

const char *old_name;

const char *new_name = NULL;

struct ether_addr generated_mac;

struct ether_addr *mac = NULL;

int r, ifindex;

assert(ctx);

assert(config);

assert(device);

assert(name);

r = link_config_ctx_connect(ctx);

if (r < 0)

return r;

old_name = udev_device_get_sysname(device);

if (!old_name)

return -EINVAL;

if (config->description) {

r = udev_device_set_sysattr_value(device, "ifalias",

config->description);

if (r < 0)

log_warning("Could not set description of %s to '%s': %s",

old_name, config->description, strerror(-r));

}

r = ethtool_set_speed(ctx->ethtool_fd, old_name, config->speed, config->duplex);

if (r < 0)

log_warning("Could not set speed or duplex of %s to %u Mbytes (%s): %s",

old_name, config->speed, duplex_to_string(config->duplex), strerror(-r));

r = ethtool_set_wol(ctx->ethtool_fd, old_name, config->wol);

if (r < 0)

log_warning("Could not set WakeOnLan of %s to %s: %s",

old_name, wol_to_string(config->wol), strerror(-r));

ifindex = udev_device_get_ifindex(device);

if (ifindex <= 0) {

log_warning("Could not find ifindex");

return -ENODEV;

}

if (ctx->enable_name_policy && config->name_policy) {

NamePolicy *policy;

for (policy = config->name_policy; !new_name && *policy != _NAMEPOLICY_INVALID; policy++) {

switch (*policy) {

case NAMEPOLICY_ONBOARD:

new_name = udev_device_get_property_value(device, "ID_NET_NAME_ONBOARD");

break;

case NAMEPOLICY_SLOT:

new_name = udev_device_get_property_value(device, "ID_NET_NAME_SLOT");

break;

case NAMEPOLICY_PATH:

new_name = udev_device_get_property_value(device, "ID_NET_NAME_PATH");

break;

case NAMEPOLICY_MAC:

new_name = udev_device_get_property_value(device, "ID_NET_NAME_MAC");

break;

default:

break;

}

}

}

if (new_name)

*name = new_name; /* a name was set by a policy */

else if (config->name)

*name = config->name; /* a name was set manually in the config */

else

*name = NULL;

switch (config->mac_policy) {

case MACPOLICY_PERSISTENT:

if (!mac_is_permanent(device)) {

r = get_mac(device, false, &generated_mac);

if (r < 0)

return r;

mac = &generated_mac;

}

break;

case MACPOLICY_RANDOM:

if (!mac_is_random(device)) {

r = get_mac(device, true, &generated_mac);

if (r < 0)

return r;

mac = &generated_mac;

}

break;

default:

mac = config->mac;

}

r = rtnl_set_link_properties(ctx->rtnl, ifindex, mac, config->mtu);

if (r < 0) {

log_warning("Could not set MACAddress or MTU on %s: %s", old_name, strerror(-r));

return r;

}

return 0;

}

static const char* const mac_policy_table[] = {

[MACPOLICY_PERSISTENT] = "persistent",

[MACPOLICY_RANDOM] = "random"

};

DEFINE_STRING_TABLE_LOOKUP(mac_policy, MACPolicy);

DEFINE_CONFIG_PARSE_ENUM(config_parse_mac_policy, mac_policy, MACPolicy, "Failed to parse MAC address policy");

static const char* const name_policy_table[] = {

[NAMEPOLICY_ONBOARD] = "onboard",

[NAMEPOLICY_SLOT] = "slot",

[NAMEPOLICY_PATH] = "path",

[NAMEPOLICY_MAC] = "mac"

};

DEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy);

DEFINE_CONFIG_PARSE_ENUMV(config_parse_name_policy, name_policy, NamePolicy, _NAMEPOLICY_INVALID, "Failed to parse interface name policy");