udev: link-config - add proper parsing

1 files changed, 128 insertions, 0 deletions

diff --git a/src/udev/net/link-config-parse.c b/src/udev/net/link-config-parse.c
new file mode 100644
index 0000000000..54dd57be59
--- /dev/null
+++ b/src/udev/net/link-config-parse.c
@@ -0,0 +1,128 @@
+/*-*- 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 "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 = calloc(1, sizeof(struct ether_addr));
+        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;
+}