362 lines
11 KiB
C
362 lines
11 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <netinet/ether.h>
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#include <linux/if.h>
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#include <arpa/inet.h>
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#include <fnmatch.h>
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#include "strv.h"
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#include "siphash24.h"
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#include "libudev-private.h"
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#include "network-internal.h"
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#include "log.h"
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#include "utf8.h"
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#include "util.h"
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#include "conf-parser.h"
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#include "condition.h"
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#define HASH_KEY SD_ID128_MAKE(d3,1e,48,fa,90,fe,4b,4c,9d,af,d5,d7,a1,b1,2e,8a)
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int net_get_unique_predictable_data(struct udev_device *device, uint8_t result[8]) {
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size_t l, sz = 0;
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const char *name = NULL, *field = NULL;
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int r;
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uint8_t *v;
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/* fetch some persistent data unique (on this machine) to this device */
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FOREACH_STRING(field, "ID_NET_NAME_ONBOARD", "ID_NET_NAME_SLOT", "ID_NET_NAME_PATH", "ID_NET_NAME_MAC") {
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name = udev_device_get_property_value(device, field);
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if (name)
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break;
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}
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if (!name)
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return -ENOENT;
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l = strlen(name);
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sz = sizeof(sd_id128_t) + l;
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v = alloca(sz);
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/* fetch some persistent data unique to this machine */
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r = sd_id128_get_machine((sd_id128_t*) v);
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if (r < 0)
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return r;
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memcpy(v + sizeof(sd_id128_t), name, l);
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/* Let's hash the machine ID plus the device name. We
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* use a fixed, but originally randomly created hash
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* key here. */
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siphash24(result, v, sz, HASH_KEY.bytes);
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return 0;
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}
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bool net_match_config(const struct ether_addr *match_mac,
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const char *match_path,
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const char *match_driver,
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const char *match_type,
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const char *match_name,
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Condition *match_host,
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Condition *match_virt,
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Condition *match_kernel,
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Condition *match_arch,
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const struct ether_addr *dev_mac,
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const char *dev_path,
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const char *dev_parent_driver,
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const char *dev_driver,
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const char *dev_type,
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const char *dev_name) {
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if (match_host && !condition_test_host(match_host))
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return 0;
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if (match_virt && !condition_test_virtualization(match_virt))
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return 0;
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if (match_kernel && !condition_test_kernel_command_line(match_kernel))
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return 0;
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if (match_arch && !condition_test_architecture(match_arch))
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return 0;
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if (match_mac && (!dev_mac || memcmp(match_mac, dev_mac, ETH_ALEN)))
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return 0;
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if (match_path && (!dev_path || fnmatch(match_path, dev_path, 0)))
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return 0;
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if (match_driver) {
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if (dev_parent_driver && !streq(match_driver, dev_parent_driver))
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return 0;
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else if (!streq_ptr(match_driver, dev_driver))
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return 0;
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}
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if (match_type && !streq_ptr(match_type, dev_type))
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return 0;
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if (match_name && (!dev_name || fnmatch(match_name, dev_name, 0)))
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return 0;
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return 1;
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}
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unsigned net_netmask_to_prefixlen(const struct in_addr *addr) {
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assert(addr);
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return 32 - u32ctz(be32toh(addr->s_addr));
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}
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int config_parse_net_condition(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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ConditionType cond = ltype;
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Condition **ret = data;
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bool negate;
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Condition *c;
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_cleanup_free_ char *s = NULL;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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negate = rvalue[0] == '!';
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if (negate)
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rvalue++;
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s = strdup(rvalue);
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if (!s)
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return log_oom();
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c = condition_new(cond, s, false, negate);
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if (!c)
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return log_oom();
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if (*ret)
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condition_free(*ret);
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*ret = c;
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return 0;
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}
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int config_parse_ifname(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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char **s = data;
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char *n;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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n = strdup(rvalue);
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if (!n)
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return log_oom();
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if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
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free(n);
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return 0;
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}
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free(*s);
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if (*n)
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*s = n;
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else {
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free(n);
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*s = NULL;
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}
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return 0;
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}
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int config_parse_ifalias(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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char **s = data;
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char *n;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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n = strdup(rvalue);
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if (!n)
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return log_oom();
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if (!ascii_is_valid(n) || strlen(n) >= IFALIASZ) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Interface alias is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
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free(n);
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return 0;
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}
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free(*s);
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if (*n)
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*s = n;
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else {
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free(n);
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*s = NULL;
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}
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return 0;
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}
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int config_parse_hwaddr(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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struct ether_addr **hwaddr = data;
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struct ether_addr *n;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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n = new0(struct ether_addr, 1);
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if (!n)
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return log_oom();
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r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
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&n->ether_addr_octet[0],
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&n->ether_addr_octet[1],
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&n->ether_addr_octet[2],
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&n->ether_addr_octet[3],
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&n->ether_addr_octet[4],
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&n->ether_addr_octet[5]);
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if (r != 6) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Not a valid MAC address, ignoring assignment: %s", rvalue);
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free(n);
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return 0;
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}
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free(*hwaddr);
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*hwaddr = n;
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return 0;
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}
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int net_parse_inaddr(const char *address, unsigned char *family, void *dst) {
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int r;
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assert(address);
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assert(family);
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assert(dst);
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/* IPv4 */
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r = inet_pton(AF_INET, address, dst);
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if (r > 0) {
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/* succsefully parsed IPv4 address */
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if (*family == AF_UNSPEC)
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*family = AF_INET;
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else if (*family != AF_INET)
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return -EINVAL;
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} else if (r < 0)
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return -errno;
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else {
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/* not an IPv4 address, so let's try IPv6 */
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r = inet_pton(AF_INET6, address, dst);
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if (r > 0) {
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/* successfully parsed IPv6 address */
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if (*family == AF_UNSPEC)
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*family = AF_INET6;
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else if (*family != AF_INET6)
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return -EINVAL;
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} else if (r < 0)
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return -errno;
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else
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return -EINVAL;
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}
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return 0;
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}
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int load_module(struct kmod_ctx *ctx, const char *mod_name) {
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struct kmod_list *modlist = NULL, *l;
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int r;
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assert(ctx);
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assert(mod_name);
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r = kmod_module_new_from_lookup(ctx, mod_name, &modlist);
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if (r < 0)
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return r;
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if (!modlist) {
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log_error("Failed to find module '%s'", mod_name);
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return -ENOENT;
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}
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kmod_list_foreach(l, modlist) {
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struct kmod_module *mod = kmod_module_get_module(l);
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r = kmod_module_probe_insert_module(mod, 0, NULL, NULL, NULL, NULL);
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if (r == 0)
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log_info("Inserted module '%s'", kmod_module_get_name(mod));
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else {
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log_error("Failed to insert '%s': %s", kmod_module_get_name(mod),
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strerror(-r));
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}
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}
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kmod_module_unref_list(modlist);
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return r;
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}
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