1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <netinet/ether.h>
24 #include <arpa/inet.h>
27 #include "siphash24.h"
28 #include "libudev-private.h"
29 #include "dhcp-lease-internal.h"
33 #include "conf-parser.h"
34 #include "condition.h"
35 #include "network-internal.h"
37 const char *net_get_name(struct udev_device *device) {
38 const char *name, *field;
42 /* fetch some persistent data unique (on this machine) to this device */
43 FOREACH_STRING(field, "ID_NET_NAME_ONBOARD", "ID_NET_NAME_SLOT", "ID_NET_NAME_PATH", "ID_NET_NAME_MAC") {
44 name = udev_device_get_property_value(device, field);
52 #define HASH_KEY SD_ID128_MAKE(d3,1e,48,fa,90,fe,4b,4c,9d,af,d5,d7,a1,b1,2e,8a)
54 int net_get_unique_predictable_data(struct udev_device *device, uint8_t result[8]) {
56 const char *name = NULL;
62 name = net_get_name(device);
67 sz = sizeof(sd_id128_t) + l;
70 /* fetch some persistent data unique to this machine */
71 r = sd_id128_get_machine((sd_id128_t*) v);
74 memcpy(v + sizeof(sd_id128_t), name, l);
76 /* Let's hash the machine ID plus the device name. We
77 * use a fixed, but originally randomly created hash
79 siphash24(result, v, sz, HASH_KEY.bytes);
84 bool net_match_config(const struct ether_addr *match_mac,
85 char * const *match_paths,
86 char * const *match_drivers,
87 char * const *match_types,
88 char * const *match_names,
89 Condition *match_host,
90 Condition *match_virt,
91 Condition *match_kernel,
92 Condition *match_arch,
93 const struct ether_addr *dev_mac,
95 const char *dev_parent_driver,
96 const char *dev_driver,
98 const char *dev_name) {
100 if (match_host && !condition_test(match_host))
103 if (match_virt && !condition_test(match_virt))
106 if (match_kernel && !condition_test(match_kernel))
109 if (match_arch && !condition_test(match_arch))
112 if (match_mac && (!dev_mac || memcmp(match_mac, dev_mac, ETH_ALEN)))
115 if (!strv_isempty(match_paths) &&
116 (!dev_path || !strv_fnmatch(match_paths, dev_path, 0)))
119 if (!strv_isempty(match_drivers) &&
120 (!dev_driver || !strv_fnmatch(match_drivers, dev_driver, 0)))
123 if (!strv_isempty(match_types) &&
124 (!dev_type || !strv_fnmatch_or_empty(match_types, dev_type, 0)))
127 if (!strv_isempty(match_names) &&
128 (!dev_name || !strv_fnmatch_or_empty(match_names, dev_name, 0)))
134 int config_parse_net_condition(const char *unit,
135 const char *filename,
138 unsigned section_line,
145 ConditionType cond = ltype;
146 Condition **ret = data;
149 _cleanup_free_ char *s = NULL;
156 negate = rvalue[0] == '!';
164 c = condition_new(cond, s, false, negate);
169 condition_free(*ret);
175 int config_parse_ifname(const char *unit,
176 const char *filename,
179 unsigned section_line,
187 _cleanup_free_ char *n = NULL;
198 if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) {
199 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
200 "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
214 int config_parse_ifnames(const char *unit,
215 const char *filename,
218 unsigned section_line,
226 const char *word, *state;
235 FOREACH_WORD(word, l, rvalue, state) {
238 n = strndup(word, l);
242 if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) {
243 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
244 "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
249 r = strv_consume(sv, n);
257 int config_parse_ifalias(const char *unit,
258 const char *filename,
261 unsigned section_line,
269 _cleanup_free_ char *n = NULL;
280 if (!ascii_is_valid(n) || strlen(n) >= IFALIASZ) {
281 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
282 "Interface alias is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
296 int config_parse_hwaddr(const char *unit,
297 const char *filename,
300 unsigned section_line,
306 struct ether_addr **hwaddr = data;
307 struct ether_addr *n;
315 n = new0(struct ether_addr, 1);
319 r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
320 &n->ether_addr_octet[0],
321 &n->ether_addr_octet[1],
322 &n->ether_addr_octet[2],
323 &n->ether_addr_octet[3],
324 &n->ether_addr_octet[4],
325 &n->ether_addr_octet[5]);
327 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
328 "Not a valid MAC address, ignoring assignment: %s", rvalue);
339 void serialize_in_addrs(FILE *f, const struct in_addr *addresses, size_t size) {
346 for (i = 0; i < size; i++)
347 fprintf(f, "%s%s", inet_ntoa(addresses[i]),
348 (i < (size - 1)) ? " ": "");
351 int deserialize_in_addrs(struct in_addr **ret, const char *string) {
352 _cleanup_free_ struct in_addr *addresses = NULL;
354 const char *word, *state;
360 FOREACH_WORD(word, len, string, state) {
361 _cleanup_free_ char *addr_str = NULL;
362 struct in_addr *new_addresses;
365 new_addresses = realloc(addresses, (size + 1) * sizeof(struct in_addr));
369 addresses = new_addresses;
371 addr_str = strndup(word, len);
375 r = inet_pton(AF_INET, addr_str, &(addresses[size]));
388 int deserialize_in6_addrs(struct in6_addr **ret, const char *string) {
389 _cleanup_free_ struct in6_addr *addresses = NULL;
391 const char *word, *state;
397 FOREACH_WORD(word, len, string, state) {
398 _cleanup_free_ char *addr_str = NULL;
399 struct in6_addr *new_addresses;
402 new_addresses = realloc(addresses, (size + 1) * sizeof(struct in6_addr));
406 addresses = new_addresses;
408 addr_str = strndup(word, len);
412 r = inet_pton(AF_INET6, addr_str, &(addresses[size]));
425 void serialize_dhcp_routes(FILE *f, const char *key, struct sd_dhcp_route *routes, size_t size) {
433 fprintf(f, "%s=", key);
435 for (i = 0; i < size; i++) {
436 fprintf(f, "%s/%" PRIu8, inet_ntoa(routes[i].dst_addr),
437 routes[i].dst_prefixlen);
438 fprintf(f, ",%s%s", inet_ntoa(routes[i].gw_addr),
439 (i < (size - 1)) ? " ": "");
445 int deserialize_dhcp_routes(struct sd_dhcp_route **ret, size_t *ret_size, size_t *ret_allocated, const char *string) {
446 _cleanup_free_ struct sd_dhcp_route *routes = NULL;
447 size_t size = 0, allocated = 0;
448 const char *word, *state;
453 assert(ret_allocated);
456 FOREACH_WORD(word, len, string, state) {
457 /* WORD FORMAT: dst_ip/dst_prefixlen,gw_ip */
458 _cleanup_free_ char* entry = NULL;
463 if (!GREEDY_REALLOC(routes, allocated, size + 1))
466 entry = strndup(word, len);
473 tok_end = strchr(tok, '/');
478 r = inet_aton(tok, &routes[size].dst_addr);
484 /* get the prefixlen */
485 tok_end = strchr(tok, ',');
491 r = safe_atou(tok, &n);
495 routes[size].dst_prefixlen = (uint8_t) n;
498 /* get the gateway */
499 r = inet_aton(tok, &routes[size].gw_addr);
507 *ret_allocated = allocated;