net-config: start split out matching and parsing logic

Move this to src/share/net-util.c, so it can be used elsewhere.

4 files changed, 28 insertions, 176 deletions

diff --git a/src/udev/net/link-config-gperf.gperf b/src/udev/net/link-config-gperf.gperf
index 130ebc9b90..1fe0b93e53 100644
--- a/src/udev/net/link-config-gperf.gperf
+++ b/src/udev/net/link-config-gperf.gperf
@@ -1,6 +1,7 @@
 %{
 #include <stddef.h>
 #include "conf-parser.h"
+#include "net-util.h"
 #include "link-config.h"
 #include "ethtool-util.h"
 %}
diff --git a/src/udev/net/link-config-parse.c b/src/udev/net/link-config-parse.c
deleted file mode 100644
index c339d08552..0000000000
--- a/src/udev/net/link-config-parse.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <netinet/ether.h>
-#include <net/if.h>
-
-#include "link-config.h"
-
-#include "utf8.h"
-#include "util.h"
-#include "conf-parser.h"
-
-static const char* const mac_policy_table[] = {
-        [MACPOLICY_PERSISTENT] = "persistent",
-        [MACPOLICY_RANDOM] = "random"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(mac_policy, MACPolicy);
-DEFINE_CONFIG_PARSE_ENUM(config_parse_mac_policy, mac_policy, MACPolicy, "Failed to parse MAC address policy");
-
-static const char* const name_policy_table[] = {
-        [NAMEPOLICY_ONBOARD] = "onboard",
-        [NAMEPOLICY_SLOT] = "slot",
-        [NAMEPOLICY_PATH] = "path",
-        [NAMEPOLICY_MAC] = "mac"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy);
-DEFINE_CONFIG_PARSE_ENUMV(config_parse_name_policy, name_policy, NamePolicy, _NAMEPOLICY_INVALID, "Failed to parse interface name policy");
-
-int config_parse_ifname(const char *unit,
-                        const char *filename,
-                        unsigned line,
-                        const char *section,
-                        const char *lvalue,
-                        int ltype,
-                        const char *rvalue,
-                        void *data,
-                        void *userdata) {
-
-        char **s = data;
-        char *n;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-        assert(data);
-
-        n = strdup(rvalue);
-        if (!n)
-                return log_oom();
-
-        if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) {
-                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
-                           "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
-                free(n);
-                return 0;
-        }
-
-        free(*s);
-        if (*n)
-                *s = n;
-        else {
-                free(n);
-                *s = NULL;
-        }
-
-        return 0;
-}
-
-int config_parse_hwaddr(const char *unit,
-                        const char *filename,
-                        unsigned line,
-                        const char *section,
-                        const char *lvalue,
-                        int ltype,
-                        const char *rvalue,
-                        void *data,
-                        void *userdata) {
-        struct ether_addr **hwaddr = data;
-        struct ether_addr *n;
-        int r;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-        assert(data);
-
-        n = new0(struct ether_addr, 1);
-        if (!n)
-                return log_oom();
-
-        r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
-                   &n->ether_addr_octet[0],
-                   &n->ether_addr_octet[1],
-                   &n->ether_addr_octet[2],
-                   &n->ether_addr_octet[3],
-                   &n->ether_addr_octet[4],
-                   &n->ether_addr_octet[5]);
-        if (r != 6) {
-                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
-                           "Not a valid MAC address, ignoring assignment: %s", rvalue);
-                free(n);
-                return 0;
-        }
-
-        free(*hwaddr);
-        *hwaddr = n;
-
-        return 0;
-}
diff --git a/src/udev/net/link-config.c b/src/udev/net/link-config.c
index 883aedc73c..d930afcc07 100644
--- a/src/udev/net/link-config.c
+++ b/src/udev/net/link-config.c
@@ -38,6 +38,7 @@
 #include "fileio.h"
 #include "hashmap.h"
 #include "rtnl-util.h"
+#include "net-util.h"
 
 struct link_config_ctx {
         LIST_HEAD(link_config, links);
@@ -213,7 +214,6 @@ int link_config_load(link_config_ctx *ctx) {
 
         link_configs_free(ctx);
 
-
         if (!enable_name_policy()) {
                 ctx->enable_name_policy = false;
                 log_info("Network interface NamePolicy= disabled on kernel commandline, ignoring.");
@@ -241,59 +241,23 @@ bool link_config_should_reload(link_config_ctx *ctx) {
         return paths_check_timestamp(ctx->link_dirs, &ctx->link_dirs_ts_usec, false);
 }
 
-static bool match_config(link_config *match, struct udev_device *device) {
-        const char *property;
-
-        if (match->match_mac) {
-                property = udev_device_get_sysattr_value(device, "address");
-                if (!property || memcmp(match->match_mac, ether_aton(property), ETH_ALEN)) {
-                        log_debug("Device MAC address (%s) did not match MACAddress=%s",
-                                  property, ether_ntoa(match->match_mac));
-                        return 0;
-                }
-        }
-
-        if (match->match_path) {
-                property = udev_device_get_property_value(device, "ID_PATH");
-                if (!streq_ptr(match->match_path, property)) {
-                        log_debug("Device's persistent path (%s) did not match Path=%s",
-                                  property, match->match_path);
-                        return 0;
-                }
-        }
-
-        if (match->match_driver) {
-                property = udev_device_get_driver(device);
-                if (!streq_ptr(match->match_driver, property)) {
-                        log_debug("Device driver (%s) did not match Driver=%s",
-                                  property, match->match_driver);
-                        return 0;
-                }
-        }
-
-        if (match->match_type) {
-                property = udev_device_get_devtype(device);
-                if (!streq_ptr(match->match_type, property)) {
-                        log_debug("Device type (%s) did not match Type=%s",
-                                  property, match->match_type);
-                        return 0;
-                }
-        }
-
-        return 1;
-}
-
 int link_config_get(link_config_ctx *ctx, struct udev_device *device, link_config **ret) {
         link_config *link;
 
         LIST_FOREACH(links, link, ctx->links) {
-                if (match_config(link, device)) {
-                        log_debug("Config file %s applies to device %s", link->filename, udev_device_get_sysname(device));
+                if (net_match_config(link->match_mac, link->match_path,
+                                     link->match_driver, link->match_type,
+                                     NULL, device)) {
+                        log_debug("Config file %s applies to device %s",
+                                  link->filename,
+                                  udev_device_get_sysname(device));
                         *ret = link;
                         return 0;
                 }
         }
 
+        *ret = NULL;
+
         return -ENOENT;
 }
 
@@ -479,3 +443,21 @@ int link_config_apply(link_config_ctx *ctx, link_config *config, struct udev_dev
 
         return 0;
 }
+
+static const char* const mac_policy_table[] = {
+        [MACPOLICY_PERSISTENT] = "persistent",
+        [MACPOLICY_RANDOM] = "random"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(mac_policy, MACPolicy);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_mac_policy, mac_policy, MACPolicy, "Failed to parse MAC address policy");
+
+static const char* const name_policy_table[] = {
+        [NAMEPOLICY_ONBOARD] = "onboard",
+        [NAMEPOLICY_SLOT] = "slot",
+        [NAMEPOLICY_PATH] = "path",
+        [NAMEPOLICY_MAC] = "mac"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(name_policy, NamePolicy);
+DEFINE_CONFIG_PARSE_ENUMV(config_parse_name_policy, name_policy, NamePolicy, _NAMEPOLICY_INVALID, "Failed to parse interface name policy");
diff --git a/src/udev/net/link-config.h b/src/udev/net/link-config.h
index b3ee81fdaa..9747003635 100644
--- a/src/udev/net/link-config.h
+++ b/src/udev/net/link-config.h
@@ -85,7 +85,5 @@ MACPolicy mac_policy_from_string(const char *p) _pure_;
 /* gperf lookup function */
 const struct ConfigPerfItem* link_config_gperf_lookup(const char *key, unsigned length);
 
-int config_parse_hwaddr(const char *unit, const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
-int config_parse_ifname(const char *unit, const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_mac_policy(const char *unit, const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_name_policy(const char *unit, const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);