838 lines
25 KiB
C
838 lines
25 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <arpa/inet.h>
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#include <linux/if.h>
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#include <netinet/ether.h>
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#include "sd-id128.h"
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#include "sd-ndisc.h"
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#include "alloc-util.h"
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#include "condition.h"
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#include "conf-parser.h"
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#include "device-util.h"
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#include "dhcp-lease-internal.h"
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#include "env-util.h"
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#include "ether-addr-util.h"
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#include "hexdecoct.h"
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#include "log.h"
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#include "network-internal.h"
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#include "parse-util.h"
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#include "siphash24.h"
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#include "socket-util.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "strv.h"
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#include "utf8.h"
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#include "util.h"
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const char *net_get_name_persistent(sd_device *device) {
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const char *name, *field;
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assert(device);
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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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if (sd_device_get_property_value(device, field, &name) >= 0)
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return name;
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return NULL;
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}
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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(sd_device *device, bool use_sysname, uint64_t *result) {
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size_t l, sz = 0;
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const char *name;
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int r;
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uint8_t *v;
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assert(device);
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/* net_get_name_persistent() will return one of the device names based on stable information about
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* the device. If this is not available, we fall back to using the actual device name. */
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name = net_get_name_persistent(device);
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if (!name && use_sysname)
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(void) sd_device_get_sysname(device, &name);
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if (!name)
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return log_device_debug_errno(device, SYNTHETIC_ERRNO(ENODATA),
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"No stable identifying information found");
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log_device_debug(device, "Using \"%s\" as stable identifying information", name);
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l = strlen(name);
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sz = sizeof(sd_id128_t) + l;
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v = newa(uint8_t, 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 use
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* a fixed, but originally randomly created hash key here. */
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*result = htole64(siphash24(v, sz, HASH_KEY.bytes));
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return 0;
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}
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static bool net_condition_test_strv(char * const *patterns, const char *string) {
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char * const *p;
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bool match = false, has_positive_rule = false;
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if (strv_isempty(patterns))
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return true;
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STRV_FOREACH(p, patterns) {
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const char *q = *p;
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bool invert;
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invert = *q == '!';
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q += invert;
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if (!invert)
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has_positive_rule = true;
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if (string && fnmatch(q, string, 0) == 0) {
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if (invert)
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return false;
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else
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match = true;
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}
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}
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return has_positive_rule ? match : true;
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}
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static int net_condition_test_property(char * const *match_property, sd_device *device) {
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char * const *p;
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if (strv_isempty(match_property))
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return true;
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STRV_FOREACH(p, match_property) {
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_cleanup_free_ char *key = NULL;
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const char *val, *dev_val;
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bool invert, v;
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invert = **p == '!';
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val = strchr(*p + invert, '=');
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if (!val)
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return -EINVAL;
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key = strndup(*p + invert, val - *p - invert);
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if (!key)
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return -ENOMEM;
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val++;
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v = device &&
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sd_device_get_property_value(device, key, &dev_val) >= 0 &&
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fnmatch(val, dev_val, 0) == 0;
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if (invert ? v : !v)
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return false;
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}
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return true;
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}
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static const char *const wifi_iftype_table[NL80211_IFTYPE_MAX+1] = {
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[NL80211_IFTYPE_ADHOC] = "ad-hoc",
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[NL80211_IFTYPE_STATION] = "station",
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[NL80211_IFTYPE_AP] = "ap",
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[NL80211_IFTYPE_AP_VLAN] = "ap-vlan",
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[NL80211_IFTYPE_WDS] = "wds",
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[NL80211_IFTYPE_MONITOR] = "monitor",
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[NL80211_IFTYPE_MESH_POINT] = "mesh-point",
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[NL80211_IFTYPE_P2P_CLIENT] = "p2p-client",
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[NL80211_IFTYPE_P2P_GO] = "p2p-go",
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[NL80211_IFTYPE_P2P_DEVICE] = "p2p-device",
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[NL80211_IFTYPE_OCB] = "ocb",
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[NL80211_IFTYPE_NAN] = "nan",
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};
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DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(wifi_iftype, enum nl80211_iftype);
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bool net_match_config(Set *match_mac,
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char * const *match_paths,
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char * const *match_drivers,
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char * const *match_types,
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char * const *match_names,
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char * const *match_property,
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char * const *match_wifi_iftype,
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char * const *match_ssid,
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Set *match_bssid,
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sd_device *device,
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const struct ether_addr *dev_mac,
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const char *dev_name,
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enum nl80211_iftype wifi_iftype,
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const char *ssid,
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const struct ether_addr *bssid) {
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const char *dev_path = NULL, *dev_driver = NULL, *dev_type = NULL, *mac_str;
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if (device) {
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(void) sd_device_get_property_value(device, "ID_PATH", &dev_path);
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(void) sd_device_get_property_value(device, "ID_NET_DRIVER", &dev_driver);
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(void) sd_device_get_devtype(device, &dev_type);
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if (!dev_name)
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(void) sd_device_get_sysname(device, &dev_name);
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if (!dev_mac &&
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sd_device_get_sysattr_value(device, "address", &mac_str) >= 0)
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dev_mac = ether_aton(mac_str);
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}
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if (match_mac && (!dev_mac || !set_contains(match_mac, dev_mac)))
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return false;
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if (!net_condition_test_strv(match_paths, dev_path))
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return false;
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if (!net_condition_test_strv(match_drivers, dev_driver))
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return false;
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if (!net_condition_test_strv(match_types, dev_type))
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return false;
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if (!net_condition_test_strv(match_names, dev_name))
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return false;
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if (!net_condition_test_property(match_property, device))
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return false;
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if (!net_condition_test_strv(match_wifi_iftype, wifi_iftype_to_string(wifi_iftype)))
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return false;
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if (!net_condition_test_strv(match_ssid, ssid))
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return false;
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if (match_bssid && (!bssid || !set_contains(match_bssid, bssid)))
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return false;
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return true;
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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 **list = data, *c;
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bool negate;
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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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if (isempty(rvalue)) {
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*list = condition_free_list_type(*list, cond);
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return 0;
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}
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negate = rvalue[0] == '!';
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if (negate)
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rvalue++;
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c = condition_new(cond, rvalue, false, negate);
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if (!c)
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return log_oom();
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/* Drop previous assignment. */
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*list = condition_free_list_type(*list, cond);
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LIST_PREPEND(conditions, *list, c);
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return 0;
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}
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int config_parse_match_strv(
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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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const char *p = rvalue;
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char ***sv = data;
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bool invert;
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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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if (isempty(rvalue)) {
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*sv = strv_free(*sv);
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return 0;
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}
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invert = *p == '!';
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p += invert;
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for (;;) {
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_cleanup_free_ char *word = NULL, *k = NULL;
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r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE);
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if (r == 0)
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return 0;
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if (r == -ENOMEM)
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return log_oom();
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
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return 0;
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}
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if (invert) {
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k = strjoin("!", word);
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if (!k)
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return log_oom();
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} else
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k = TAKE_PTR(word);
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r = strv_consume(sv, TAKE_PTR(k));
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if (r < 0)
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return log_oom();
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}
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}
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int config_parse_match_ifnames(
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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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const char *p = rvalue;
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char ***sv = data;
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bool invert;
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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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invert = *p == '!';
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p += invert;
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for (;;) {
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_cleanup_free_ char *word = NULL, *k = NULL;
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r = extract_first_word(&p, &word, NULL, 0);
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if (r == 0)
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return 0;
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if (r == -ENOMEM)
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return log_oom();
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"Failed to parse interface name list: %s", rvalue);
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return 0;
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}
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if (!ifname_valid(word)) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"Interface name is not valid or too long, ignoring assignment: %s", word);
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continue;
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}
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if (invert) {
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k = strjoin("!", word);
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if (!k)
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return log_oom();
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} else
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k = TAKE_PTR(word);
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r = strv_consume(sv, TAKE_PTR(k));
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if (r < 0)
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return log_oom();
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}
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}
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int config_parse_match_property(
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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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const char *p = rvalue;
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char ***sv = data;
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bool invert;
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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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invert = *p == '!';
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p += invert;
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for (;;) {
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_cleanup_free_ char *word = NULL, *k = NULL;
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r = extract_first_word(&p, &word, NULL, EXTRACT_CUNESCAPE|EXTRACT_UNQUOTE);
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if (r == 0)
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return 0;
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if (r == -ENOMEM)
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return log_oom();
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"Invalid syntax, ignoring: %s", rvalue);
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return 0;
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}
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if (!env_assignment_is_valid(word)) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"Invalid property or value, ignoring assignment: %s", word);
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continue;
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}
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if (invert) {
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k = strjoin("!", word);
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if (!k)
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return log_oom();
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} else
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k = TAKE_PTR(word);
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r = strv_consume(sv, TAKE_PTR(k));
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if (r < 0)
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return log_oom();
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}
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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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_cleanup_free_ char *n = 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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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, 0, "Interface alias is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
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return 0;
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}
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if (isempty(n))
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*s = mfree(*s);
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else
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free_and_replace(*s, n);
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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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_cleanup_free_ struct ether_addr *n = NULL;
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struct ether_addr **hwaddr = data;
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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 = ether_addr_from_string(rvalue, n);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Not a valid MAC address, ignoring assignment: %s", rvalue);
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return 0;
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}
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free_and_replace(*hwaddr, n);
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return 0;
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}
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int config_parse_hwaddrs(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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_cleanup_set_free_free_ Set *s = NULL;
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const char *p = rvalue;
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Set **hwaddrs = data;
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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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if (isempty(rvalue)) {
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/* Empty assignment resets the list */
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*hwaddrs = set_free_free(*hwaddrs);
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return 0;
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}
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s = set_new(ðer_addr_hash_ops);
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if (!s)
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return log_oom();
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for (;;) {
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_cleanup_free_ char *word = NULL;
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_cleanup_free_ struct ether_addr *n = NULL;
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r = extract_first_word(&p, &word, NULL, 0);
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if (r == 0)
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break;
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if (r == -ENOMEM)
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return log_oom();
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
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return 0;
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}
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n = new(struct ether_addr, 1);
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if (!n)
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return log_oom();
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r = ether_addr_from_string(word, n);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring: %s", word);
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continue;
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}
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r = set_put(s, n);
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if (r < 0)
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return log_oom();
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if (r > 0)
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n = NULL; /* avoid cleanup */
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}
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r = set_ensure_allocated(hwaddrs, ðer_addr_hash_ops);
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if (r < 0)
|
|
return log_oom();
|
|
|
|
r = set_move(*hwaddrs, s);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_bridge_port_priority(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
uint16_t i;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = safe_atou16(rvalue, &i);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"Failed to parse bridge port priority, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (i > LINK_BRIDGE_PORT_PRIORITY_MAX) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"Bridge port priority is larger than maximum %u, ignoring: %s", LINK_BRIDGE_PORT_PRIORITY_MAX, rvalue);
|
|
return 0;
|
|
}
|
|
|
|
*((uint16_t *)data) = i;
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t serialize_in_addrs(FILE *f,
|
|
const struct in_addr *addresses,
|
|
size_t size,
|
|
bool with_leading_space,
|
|
bool (*predicate)(const struct in_addr *addr)) {
|
|
size_t count;
|
|
size_t i;
|
|
|
|
assert(f);
|
|
assert(addresses);
|
|
|
|
count = 0;
|
|
|
|
for (i = 0; i < size; i++) {
|
|
char sbuf[INET_ADDRSTRLEN];
|
|
|
|
if (predicate && !predicate(&addresses[i]))
|
|
continue;
|
|
if (with_leading_space)
|
|
fputc(' ', f);
|
|
else
|
|
with_leading_space = true;
|
|
fputs(inet_ntop(AF_INET, &addresses[i], sbuf, sizeof(sbuf)), f);
|
|
count++;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
int deserialize_in_addrs(struct in_addr **ret, const char *string) {
|
|
_cleanup_free_ struct in_addr *addresses = NULL;
|
|
int size = 0;
|
|
|
|
assert(ret);
|
|
assert(string);
|
|
|
|
for (;;) {
|
|
_cleanup_free_ char *word = NULL;
|
|
struct in_addr *new_addresses;
|
|
int r;
|
|
|
|
r = extract_first_word(&string, &word, NULL, 0);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
break;
|
|
|
|
new_addresses = reallocarray(addresses, size + 1, sizeof(struct in_addr));
|
|
if (!new_addresses)
|
|
return -ENOMEM;
|
|
else
|
|
addresses = new_addresses;
|
|
|
|
r = inet_pton(AF_INET, word, &(addresses[size]));
|
|
if (r <= 0)
|
|
continue;
|
|
|
|
size++;
|
|
}
|
|
|
|
*ret = size > 0 ? TAKE_PTR(addresses) : NULL;
|
|
|
|
return size;
|
|
}
|
|
|
|
void serialize_in6_addrs(FILE *f, const struct in6_addr *addresses, size_t size) {
|
|
unsigned i;
|
|
|
|
assert(f);
|
|
assert(addresses);
|
|
assert(size);
|
|
|
|
for (i = 0; i < size; i++) {
|
|
char buffer[INET6_ADDRSTRLEN];
|
|
|
|
fputs(inet_ntop(AF_INET6, addresses+i, buffer, sizeof(buffer)), f);
|
|
|
|
if (i < size - 1)
|
|
fputc(' ', f);
|
|
}
|
|
}
|
|
|
|
int deserialize_in6_addrs(struct in6_addr **ret, const char *string) {
|
|
_cleanup_free_ struct in6_addr *addresses = NULL;
|
|
int size = 0;
|
|
|
|
assert(ret);
|
|
assert(string);
|
|
|
|
for (;;) {
|
|
_cleanup_free_ char *word = NULL;
|
|
struct in6_addr *new_addresses;
|
|
int r;
|
|
|
|
r = extract_first_word(&string, &word, NULL, 0);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
break;
|
|
|
|
new_addresses = reallocarray(addresses, size + 1, sizeof(struct in6_addr));
|
|
if (!new_addresses)
|
|
return -ENOMEM;
|
|
else
|
|
addresses = new_addresses;
|
|
|
|
r = inet_pton(AF_INET6, word, &(addresses[size]));
|
|
if (r <= 0)
|
|
continue;
|
|
|
|
size++;
|
|
}
|
|
|
|
*ret = TAKE_PTR(addresses);
|
|
|
|
return size;
|
|
}
|
|
|
|
void serialize_dhcp_routes(FILE *f, const char *key, sd_dhcp_route **routes, size_t size) {
|
|
unsigned i;
|
|
|
|
assert(f);
|
|
assert(key);
|
|
assert(routes);
|
|
assert(size);
|
|
|
|
fprintf(f, "%s=", key);
|
|
|
|
for (i = 0; i < size; i++) {
|
|
char sbuf[INET_ADDRSTRLEN];
|
|
struct in_addr dest, gw;
|
|
uint8_t length;
|
|
|
|
assert_se(sd_dhcp_route_get_destination(routes[i], &dest) >= 0);
|
|
assert_se(sd_dhcp_route_get_gateway(routes[i], &gw) >= 0);
|
|
assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &length) >= 0);
|
|
|
|
fprintf(f, "%s/%" PRIu8, inet_ntop(AF_INET, &dest, sbuf, sizeof(sbuf)), length);
|
|
fprintf(f, ",%s%s", inet_ntop(AF_INET, &gw, sbuf, sizeof(sbuf)), (i < (size - 1)) ? " ": "");
|
|
}
|
|
|
|
fputs("\n", f);
|
|
}
|
|
|
|
int deserialize_dhcp_routes(struct sd_dhcp_route **ret, size_t *ret_size, size_t *ret_allocated, const char *string) {
|
|
_cleanup_free_ struct sd_dhcp_route *routes = NULL;
|
|
size_t size = 0, allocated = 0;
|
|
|
|
assert(ret);
|
|
assert(ret_size);
|
|
assert(ret_allocated);
|
|
assert(string);
|
|
|
|
/* WORD FORMAT: dst_ip/dst_prefixlen,gw_ip */
|
|
for (;;) {
|
|
_cleanup_free_ char *word = NULL;
|
|
char *tok, *tok_end;
|
|
unsigned n;
|
|
int r;
|
|
|
|
r = extract_first_word(&string, &word, NULL, 0);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
break;
|
|
|
|
if (!GREEDY_REALLOC(routes, allocated, size + 1))
|
|
return -ENOMEM;
|
|
|
|
tok = word;
|
|
|
|
/* get the subnet */
|
|
tok_end = strchr(tok, '/');
|
|
if (!tok_end)
|
|
continue;
|
|
*tok_end = '\0';
|
|
|
|
r = inet_aton(tok, &routes[size].dst_addr);
|
|
if (r == 0)
|
|
continue;
|
|
|
|
tok = tok_end + 1;
|
|
|
|
/* get the prefixlen */
|
|
tok_end = strchr(tok, ',');
|
|
if (!tok_end)
|
|
continue;
|
|
|
|
*tok_end = '\0';
|
|
|
|
r = safe_atou(tok, &n);
|
|
if (r < 0 || n > 32)
|
|
continue;
|
|
|
|
routes[size].dst_prefixlen = (uint8_t) n;
|
|
tok = tok_end + 1;
|
|
|
|
/* get the gateway */
|
|
r = inet_aton(tok, &routes[size].gw_addr);
|
|
if (r == 0)
|
|
continue;
|
|
|
|
size++;
|
|
}
|
|
|
|
*ret_size = size;
|
|
*ret_allocated = allocated;
|
|
*ret = TAKE_PTR(routes);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int serialize_dhcp_option(FILE *f, const char *key, const void *data, size_t size) {
|
|
_cleanup_free_ char *hex_buf = NULL;
|
|
|
|
assert(f);
|
|
assert(key);
|
|
assert(data);
|
|
|
|
hex_buf = hexmem(data, size);
|
|
if (!hex_buf)
|
|
return -ENOMEM;
|
|
|
|
fprintf(f, "%s=%s\n", key, hex_buf);
|
|
|
|
return 0;
|
|
}
|