systemd/src/udev/net/link-config-parse.c

/*-*- 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;
}