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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 <linux/if.h>
#include <arpa/inet.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,
const char *dev_mac,
const char *dev_path,
const char *dev_driver,
const char *dev_type,
const char *dev_name) {
if (match_mac && (!dev_mac || memcmp(match_mac, ether_aton(dev_mac), ETH_ALEN)))
return 0;
if (match_path && !streq_ptr(match_path, dev_path))
return 0;
if (match_driver && !streq_ptr(match_driver, dev_driver))
return 0;
if (match_type && !streq_ptr(match_type, dev_type))
return 0;
if (match_name && !streq_ptr(match_name, dev_name))
return 0;
return 1;
}
unsigned net_netmask_to_prefixlen(const struct in_addr *addr) {
unsigned len = 0;
uint32_t mask;
assert(addr);
mask = be32toh(addr->s_addr);
while (mask) {
len++;
mask = mask << 1;
}
return len;
}
int config_parse_ifname(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) {
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_ifalias(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) {
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) >= IFALIASZ) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Interface alias 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,
unsigned section_line,
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;
}
int net_parse_inaddr(const char *address, unsigned char *family, void *dst) {
int r;
assert(address);
assert(family);
assert(dst);
/* IPv4 */
r = inet_pton(AF_INET, address, dst);
if (r > 0) {
/* succsefully parsed IPv4 address */
if (*family == AF_UNSPEC)
*family = AF_INET;
else if (*family != AF_INET)
return -EINVAL;
} else if (r < 0)
return -errno;
else {
/* not an IPv4 address, so let's try IPv6 */
r = inet_pton(AF_INET6, address, dst);
if (r > 0) {
/* successfully parsed IPv6 address */
if (*family == AF_UNSPEC)
*family = AF_INET6;
else if (*family != AF_INET6)
return -EINVAL;
} else if (r < 0)
return -errno;
else
return -EINVAL;
}
return 0;
}
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