Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 399 insertions, 0 deletions

diff --git a/src/shared/net-condition.c b/src/shared/net-condition.c
new file mode 100644
index 0000000..d8b0fef
--- /dev/null
+++ b/src/shared/net-condition.c
@@ -0,0 +1,399 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <netinet/ether.h>
+
+#include "condition.h"
+#include "env-util.h"
+#include "log.h"
+#include "net-condition.h"
+#include "netif-util.h"
+#include "network-util.h"
+#include "socket-util.h"
+#include "string-table.h"
+#include "strv.h"
+#include "wifi-util.h"
+
+void net_match_clear(NetMatch *match) {
+        if (!match)
+                return;
+
+        match->hw_addr = set_free(match->hw_addr);
+        match->permanent_hw_addr = set_free(match->permanent_hw_addr);
+        match->path = strv_free(match->path);
+        match->driver = strv_free(match->driver);
+        match->iftype = strv_free(match->iftype);
+        match->kind = strv_free(match->kind);
+        match->ifname = strv_free(match->ifname);
+        match->property = strv_free(match->property);
+        match->wlan_iftype = strv_free(match->wlan_iftype);
+        match->ssid = strv_free(match->ssid);
+        match->bssid = set_free(match->bssid);
+}
+
+bool net_match_is_empty(const NetMatch *match) {
+        assert(match);
+
+        return
+                set_isempty(match->hw_addr) &&
+                set_isempty(match->permanent_hw_addr) &&
+                strv_isempty(match->path) &&
+                strv_isempty(match->driver) &&
+                strv_isempty(match->iftype) &&
+                strv_isempty(match->kind) &&
+                strv_isempty(match->ifname) &&
+                strv_isempty(match->property) &&
+                strv_isempty(match->wlan_iftype) &&
+                strv_isempty(match->ssid) &&
+                set_isempty(match->bssid);
+}
+
+static bool net_condition_test_strv(char * const *patterns, const char *string) {
+        bool match = false, has_positive_rule = false;
+
+        if (strv_isempty(patterns))
+                return true;
+
+        STRV_FOREACH(p, patterns) {
+                const char *q = *p;
+                bool invert;
+
+                invert = *q == '!';
+                q += invert;
+
+                if (!invert)
+                        has_positive_rule = true;
+
+                if (string && fnmatch(q, string, 0) == 0) {
+                        if (invert)
+                                return false;
+                        else
+                                match = true;
+                }
+        }
+
+        return has_positive_rule ? match : true;
+}
+
+static bool net_condition_test_ifname(char * const *patterns, const char *ifname, char * const *alternative_names) {
+        if (net_condition_test_strv(patterns, ifname))
+                return true;
+
+        STRV_FOREACH(p, alternative_names)
+                if (net_condition_test_strv(patterns, *p))
+                        return true;
+
+        return false;
+}
+
+static int net_condition_test_property(char * const *match_property, sd_device *device) {
+        if (strv_isempty(match_property))
+                return true;
+
+        STRV_FOREACH(p, match_property) {
+                _cleanup_free_ char *key = NULL;
+                const char *val, *dev_val;
+                bool invert, v;
+
+                invert = **p == '!';
+
+                val = strchr(*p + invert, '=');
+                if (!val)
+                        return -EINVAL;
+
+                key = strndup(*p + invert, val - *p - invert);
+                if (!key)
+                        return -ENOMEM;
+
+                val++;
+
+                v = device &&
+                        sd_device_get_property_value(device, key, &dev_val) >= 0 &&
+                        fnmatch(val, dev_val, 0) == 0;
+
+                if (invert ? v : !v)
+                        return false;
+        }
+
+        return true;
+}
+
+int net_match_config(
+                const NetMatch *match,
+                sd_device *device,
+                const struct hw_addr_data *hw_addr,
+                const struct hw_addr_data *permanent_hw_addr,
+                const char *driver,
+                unsigned short iftype,
+                const char *kind,
+                const char *ifname,
+                char * const *alternative_names,
+                enum nl80211_iftype wlan_iftype,
+                const char *ssid,
+                const struct ether_addr *bssid) {
+
+        _cleanup_free_ char *iftype_str = NULL;
+        const char *path = NULL;
+
+        assert(match);
+
+        if (net_get_type_string(device, iftype, &iftype_str) == -ENOMEM)
+                return -ENOMEM;
+
+        if (device)
+                (void) sd_device_get_property_value(device, "ID_PATH", &path);
+
+        if (match->hw_addr && (!hw_addr || !set_contains(match->hw_addr, hw_addr)))
+                return false;
+
+        if (match->permanent_hw_addr &&
+            (!permanent_hw_addr ||
+             !set_contains(match->permanent_hw_addr, permanent_hw_addr)))
+                return false;
+
+        if (!net_condition_test_strv(match->path, path))
+                return false;
+
+        if (!net_condition_test_strv(match->driver, driver))
+                return false;
+
+        if (!net_condition_test_strv(match->iftype, iftype_str))
+                return false;
+
+        if (!net_condition_test_strv(match->kind, kind))
+                return false;
+
+        if (!net_condition_test_ifname(match->ifname, ifname, alternative_names))
+                return false;
+
+        if (!net_condition_test_property(match->property, device))
+                return false;
+
+        if (!net_condition_test_strv(match->wlan_iftype, nl80211_iftype_to_string(wlan_iftype)))
+                return false;
+
+        if (!net_condition_test_strv(match->ssid, ssid))
+                return false;
+
+        if (match->bssid && (!bssid || !set_contains(match->bssid, bssid)))
+                return false;
+
+        return true;
+}
+
+int config_parse_net_condition(
+                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) {
+
+        ConditionType cond = ltype;
+        Condition **list = data, *c;
+        bool negate;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        if (isempty(rvalue)) {
+                *list = condition_free_list_type(*list, cond);
+                return 0;
+        }
+
+        negate = rvalue[0] == '!';
+        if (negate)
+                rvalue++;
+
+        c = condition_new(cond, rvalue, false, negate);
+        if (!c)
+                return log_oom();
+
+        /* Drop previous assignment. */
+        *list = condition_free_list_type(*list, cond);
+
+        LIST_PREPEND(conditions, *list, c);
+        return 0;
+}
+
+int config_parse_match_strv(
+                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) {
+
+        const char *p = ASSERT_PTR(rvalue);
+        char ***sv = ASSERT_PTR(data);
+        bool invert;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+
+        if (isempty(rvalue)) {
+                *sv = strv_free(*sv);
+                return 0;
+        }
+
+        invert = *p == '!';
+        p += invert;
+
+        for (;;) {
+                _cleanup_free_ char *word = NULL, *k = NULL;
+
+                r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE);
+                if (r == 0)
+                        return 0;
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Invalid syntax, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                if (invert) {
+                        k = strjoin("!", word);
+                        if (!k)
+                                return log_oom();
+                } else
+                        k = TAKE_PTR(word);
+
+                r = strv_consume(sv, TAKE_PTR(k));
+                if (r < 0)
+                        return log_oom();
+        }
+}
+
+int config_parse_match_ifnames(
+                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) {
+
+        const char *p = ASSERT_PTR(rvalue);
+        char ***sv = ASSERT_PTR(data);
+        bool invert;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+
+        if (isempty(rvalue)) {
+                *sv = strv_free(*sv);
+                return 0;
+        }
+
+        invert = *p == '!';
+        p += invert;
+
+        for (;;) {
+                _cleanup_free_ char *word = NULL, *k = NULL;
+
+                r = extract_first_word(&p, &word, NULL, 0);
+                if (r == 0)
+                        return 0;
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Failed to parse interface name list, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                if (!ifname_valid_full(word, ltype)) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Interface name is not valid or too long, ignoring assignment: %s", word);
+                        continue;
+                }
+
+                if (invert) {
+                        k = strjoin("!", word);
+                        if (!k)
+                                return log_oom();
+                } else
+                        k = TAKE_PTR(word);
+
+                r = strv_consume(sv, TAKE_PTR(k));
+                if (r < 0)
+                        return log_oom();
+        }
+}
+
+int config_parse_match_property(
+                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) {
+
+        const char *p = ASSERT_PTR(rvalue);
+        char ***sv = ASSERT_PTR(data);
+        bool invert;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+
+        if (isempty(rvalue)) {
+                *sv = strv_free(*sv);
+                return 0;
+        }
+
+        invert = *p == '!';
+        p += invert;
+
+        for (;;) {
+                _cleanup_free_ char *word = NULL, *k = NULL;
+
+                r = extract_first_word(&p, &word, NULL, EXTRACT_CUNESCAPE|EXTRACT_UNQUOTE);
+                if (r == 0)
+                        return 0;
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Invalid syntax, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                if (!env_assignment_is_valid(word)) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Invalid property or value, ignoring assignment: %s", word);
+                        continue;
+                }
+
+                if (invert) {
+                        k = strjoin("!", word);
+                        if (!k)
+                                return log_oom();
+                } else
+                        k = TAKE_PTR(word);
+
+                r = strv_consume(sv, TAKE_PTR(k));
+                if (r < 0)
+                        return log_oom();
+        }
+}