networkd-address.c revision cf6a8911738fe2635a5210769d5348b05b166691
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 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 <net/if.h>
#include "networkd.h"
#include "utf8.h"
#include "util.h"
#include "conf-parser.h"
#include "net-util.h"
int address_new_static(Network *network, unsigned section, Address **ret) {
_cleanup_address_free_ Address *address = NULL;
if (section) {
uint64_t key = section;
address = hashmap_get(network->addresses_by_section, &key);
if (address) {
*ret = address;
address = NULL;
return 0;
}
}
address = new0(Address, 1);
if (!address)
return -ENOMEM;
address->family = AF_UNSPEC;
address->network = network;
LIST_PREPEND(static_addresses, network->static_addresses, address);
if (section) {
address->section = section;
hashmap_put(network->addresses_by_section, &address->section, address);
}
*ret = address;
address = NULL;
return 0;
}
int address_new_dynamic(Address **ret) {
_cleanup_address_free_ Address *address = NULL;
address = new0(Address, 1);
if (!address)
return -ENOMEM;
address->family = AF_UNSPEC;
*ret = address;
address = NULL;
return 0;
}
void address_free(Address *address) {
if (!address)
return;
if (address->network) {
LIST_REMOVE(static_addresses, address->network->static_addresses, address);
if (address->section)
hashmap_remove(address->network->addresses_by_section,
&address->section);
}
free(address);
}
int address_drop(Address *address, Link *link,
sd_rtnl_message_handler_t callback) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
int r;
assert(address);
assert(address->family == AF_INET || address->family == AF_INET6);
assert(link);
assert(link->ifindex > 0);
assert(link->manager);
assert(link->manager->rtnl);
r = sd_rtnl_message_addr_new(RTM_DELADDR, link->ifindex, address->family, &req);
if (r < 0) {
log_error("Could not allocate RTM_DELADDR message: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
if (r < 0) {
log_error("Could not set prefixlen: %s", strerror(-r));
return r;
}
if (address->family == AF_INET)
r = sd_rtnl_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
else if (address->family == AF_INET6)
r = sd_rtnl_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
if (r < 0) {
log_error("Could not append IFA_LOCAL attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
if (r < 0) {
log_error("Could not send rtnetlink message: %s", strerror(-r));
return r;
}
return 0;
}
int address_configure(Address *address, Link *link,
sd_rtnl_message_handler_t callback) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
int r;
assert(address);
assert(address->family == AF_INET || address->family == AF_INET6);
assert(link);
assert(link->ifindex > 0);
assert(link->manager);
assert(link->manager->rtnl);
r = sd_rtnl_message_addr_new(RTM_NEWADDR, link->ifindex,
address->family, &req);
if (r < 0) {
log_error("Could not allocate RTM_NEWADDR message: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
if (r < 0) {
log_error("Could not set prefixlen: %s", strerror(-r));
return r;
}
r = sd_rtnl_message_addr_set_flags(req, IFA_F_PERMANENT);
if (r < 0) {
log_error("Could not set flags: %s", strerror(-r));
return r;
}
r = sd_rtnl_message_addr_set_scope(req, RT_SCOPE_UNIVERSE);
if (r < 0) {
log_error("Could not set scope: %s", strerror(-r));
return r;
}
if (address->family == AF_INET)
r = sd_rtnl_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
else if (address->family == AF_INET6)
r = sd_rtnl_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
if (r < 0) {
log_error("Could not append IFA_LOCAL attribute: %s",
strerror(-r));
return r;
}
if (address->family == AF_INET) {
r = sd_rtnl_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast);
if (r < 0) {
log_error("Could not append IFA_BROADCAST attribute: %s",
strerror(-r));
return r;
}
}
if (address->label) {
r = sd_rtnl_message_append_string(req, IFA_LABEL, address->label);
if (r < 0) {
log_error("Could not append IFA_LABEL attribute: %s",
strerror(-r));
return r;
}
}
r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
if (r < 0) {
log_error("Could not send rtnetlink message: %s", strerror(-r));
return r;
}
return 0;
}
int config_parse_dns(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) {
Address **dns = data;
_cleanup_address_free_ Address *n = NULL;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_new_dynamic(&n);
if (r < 0)
return r;
r = net_parse_inaddr(rvalue, &n->family, &n->in_addr);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"DNS address is invalid, ignoring assignment: %s", rvalue);
return 0;
}
*dns = n;
n = NULL;
return 0;
}
int config_parse_broadcast(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) {
Network *network = userdata;
_cleanup_address_free_ Address *n = NULL;
_cleanup_free_ char *address = NULL;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_new_static(network, section_line, &n);
if (r < 0)
return r;
r = net_parse_inaddr(address, &n->family, &n->broadcast);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Broadcast is invalid, ignoring assignment: %s", address);
return 0;
}
n = NULL;
return 0;
}
int config_parse_address(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) {
Network *network = userdata;
_cleanup_address_free_ Address *n = NULL;
_cleanup_free_ char *address = NULL;
const char *e;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
if (streq(section, "Network")) {
/* we are not in an Address section, so treat
* this as the special '0' section */
section_line = 0;
}
r = address_new_static(network, section_line, &n);
if (r < 0)
return r;
/* Address=address/prefixlen */
/* prefixlen */
e = strchr(rvalue, '/');
if (e) {
unsigned i;
r = safe_atou(e + 1, &i);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Interface prefix length is invalid, "
"ignoring assignment: %s", e + 1);
return 0;
}
n->prefixlen = (unsigned char) i;
address = strndup(rvalue, e - rvalue);
if (!address)
return log_oom();
} else {
address = strdup(rvalue);
if (!address)
return log_oom();
}
r = net_parse_inaddr(address, &n->family, &n->in_addr);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Address is invalid, ignoring assignment: %s", address);
return 0;
}
if (n->family == AF_INET && !n->broadcast.s_addr)
n->broadcast.s_addr = n->in_addr.in.s_addr |
htonl(0xfffffffflu >> n->prefixlen);
n = NULL;
return 0;
}
int config_parse_label(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) {
Network *network = userdata;
_cleanup_address_free_ Address *n = NULL;
char *label;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = address_new_static(network, section_line, &n);
if (r < 0)
return r;
label = strdup(rvalue);
if (!label)
return log_oom();
if (!ascii_is_valid(label) || strlen(label) >= IFNAMSIZ) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Interface label is not ASCII clean or is too"
" long, ignoring assignment: %s", rvalue);
free(label);
return 0;
}
free(n->label);
if (*label)
n->label = label;
else {
free(label);
n->label = NULL;
}
n = NULL;
return 0;
}