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-rw-r--r--src/shared/net-util.c169
1 files changed, 169 insertions, 0 deletions
diff --git a/src/shared/net-util.c b/src/shared/net-util.c
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+++ b/src/shared/net-util.c
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+/*-*- 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 "net-util.h"
+#include "log.h"
+#include "utf8.h"
+#include "util.h"
+#include "conf-parser.h"
+
+bool net_match_config(const struct ether_addr *match_mac,
+ const char *match_path,
+ const char *match_driver,
+ const char *match_type,
+ const char *match_name,
+ struct udev_device *device) {
+ const char *property;
+
+ assert(device);
+
+ if (match_mac) {
+ property = udev_device_get_sysattr_value(device, "address");
+ if (!property || memcmp(match_mac, ether_aton(property), ETH_ALEN)) {
+ log_debug("Interface MAC address (%s) did not match MACAddress=%s",
+ property, ether_ntoa(match_mac));
+ return 0;
+ }
+ }
+
+ if (match_path) {
+ property = udev_device_get_property_value(device, "ID_PATH");
+ if (!streq_ptr(match_path, property)) {
+ log_debug("Interface persistent path (%s) did not match Path=%s",
+ property, match_path);
+ return 0;
+ }
+ }
+
+ if (match_driver) {
+ property = udev_device_get_driver(device);
+ if (!streq_ptr(match_driver, property)) {
+ log_debug("Interface device driver (%s) did not match Driver=%s",
+ property, match_driver);
+ return 0;
+ }
+ }
+
+ if (match_type) {
+ property = udev_device_get_devtype(device);
+ if (!streq_ptr(match_type, property)) {
+ log_debug("Interface type (%s) did not match Type=%s",
+ property, match_type);
+ return 0;
+ }
+ }
+
+ if (match_name) {
+ property = udev_device_get_sysname(device);
+ if (!streq_ptr(match_name, property)) {
+ log_debug("Interface name (%s) did not match Name=%s",
+ property, match_name);
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+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;
+}