404 lines
12 KiB
C
404 lines
12 KiB
C
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/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <netinet/ether.h>
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#include "condition.h"
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#include "env-util.h"
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#include "log.h"
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#include "net-condition.h"
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#include "network-util.h"
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#include "socket-util.h"
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#include "string-table.h"
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#include "strv.h"
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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 bool net_condition_test_ifname(char * const *patterns, const char *ifname, char * const *alternative_names) {
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if (net_condition_test_strv(patterns, ifname))
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return true;
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char * const *p;
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STRV_FOREACH(p, alternative_names)
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if (net_condition_test_strv(patterns, *p))
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return true;
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return false;
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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(
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Set *match_mac,
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Set *match_permanent_mac,
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char * const *match_paths,
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char * const *match_drivers,
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char * const *match_iftypes,
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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 struct ether_addr *dev_permanent_mac,
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const char *dev_driver,
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unsigned short dev_iftype,
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const char *dev_name,
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char * const *alternative_names,
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enum nl80211_iftype dev_wifi_iftype,
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const char *dev_ssid,
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const struct ether_addr *dev_bssid) {
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_cleanup_free_ char *dev_iftype_str;
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const char *dev_path = NULL;
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dev_iftype_str = link_get_type_string(device, dev_iftype);
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if (device) {
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const char *mac_str;
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(void) sd_device_get_property_value(device, "ID_PATH", &dev_path);
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if (!dev_driver)
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(void) sd_device_get_property_value(device, "ID_NET_DRIVER", &dev_driver);
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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 (match_permanent_mac &&
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(!dev_permanent_mac ||
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ether_addr_is_null(dev_permanent_mac) ||
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!set_contains(match_permanent_mac, dev_permanent_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_iftypes, dev_iftype_str))
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return false;
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if (!net_condition_test_ifname(match_names, dev_name, alternative_names))
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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(dev_wifi_iftype)))
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return false;
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if (!net_condition_test_strv(match_ssid, dev_ssid))
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return false;
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if (match_bssid && (!dev_bssid || !set_contains(match_bssid, dev_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(
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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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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_WARNING, filename, line, r,
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"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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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, 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_WARNING, filename, line, 0,
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"Failed to parse interface name list, ignoring: %s", rvalue);
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return 0;
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}
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if (!ifname_valid_full(word, ltype)) {
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log_syntax(unit, LOG_WARNING, 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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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_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_WARNING, 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_WARNING, 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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|
|
}
|
||
|
|
}
|