networkd-route.c revision 4fb7242cbbed0d865eb343548b8f0ee0fee71d85
/*-*- 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 route_new_static(Network *network, unsigned section, Route **ret) {
_cleanup_route_free_ Route *route = NULL;
if (section) {
uint64_t key = section;
route = hashmap_get(network->routes_by_section, &key);
if (route) {
*ret = route;
route = NULL;
return 0;
}
}
route = new0(Route, 1);
if (!route)
return -ENOMEM;
route->family = AF_UNSPEC;
route->network = network;
LIST_PREPEND(static_routes, network->static_routes, route);
if (section) {
route->section = section;
hashmap_put(network->routes_by_section, &route->section, route);
}
*ret = route;
route = NULL;
return 0;
}
int route_new_dynamic(Route **ret) {
_cleanup_route_free_ Route *route = NULL;
route = new0(Route, 1);
if (!route)
return -ENOMEM;
route->family = AF_UNSPEC;
*ret = route;
route = NULL;
return 0;
}
void route_free(Route *route) {
if (!route)
return;
if (route->network) {
LIST_REMOVE(static_routes, route->network->static_routes, route);
if (route->section)
hashmap_remove(route->network->routes_by_section,
&route->section);
}
free(route);
}
int route_configure(Route *route, Link *link,
sd_rtnl_message_handler_t callback) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
int r;
assert(link);
assert(link->manager);
assert(link->manager->rtnl);
assert(link->ifindex > 0);
assert(route->family == AF_INET || route->family == AF_INET6);
r = sd_rtnl_message_new_route(link->manager->rtnl, RTM_NEWROUTE,
route->family, &req);
if (r < 0) {
log_error("Could not create RTM_NEWROUTE message: %s", strerror(-r));
return r;
}
if (route->family == AF_INET)
r = sd_rtnl_message_append_in_addr(req, RTA_GATEWAY, &route->in_addr.in);
else if (route->family == AF_INET6)
r = sd_rtnl_message_append_in6_addr(req, RTA_GATEWAY, &route->in_addr.in6);
if (r < 0) {
log_error("Could not append RTA_GATEWAY attribute: %s", strerror(-r));
return r;
}
if (route->dst_prefixlen) {
if (route->family == AF_INET)
r = sd_rtnl_message_append_in_addr(req, RTA_DST, &route->dst_addr.in);
else if (route->family == AF_INET6)
r = sd_rtnl_message_append_in6_addr(req, RTA_DST, &route->dst_addr.in6);
if (r < 0) {
log_error("Could not append RTA_DST attribute: %s", strerror(-r));
return r;
}
r = sd_rtnl_message_route_set_dst_prefixlen(req, route->dst_prefixlen);
if (r < 0) {
log_error("Could not set destination prefix length: %s", strerror(-r));
return r;
}
}
r = sd_rtnl_message_append_u32(req, RTA_OIF, link->ifindex);
if (r < 0) {
log_error("Could not append RTA_OIF 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_gateway(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_route_free_ Route *n = NULL;
_cleanup_free_ char *route = NULL;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
if (streq(section, "Network")) {
/* we are not in an Route section, so treat
* this as the special '0' section */
section_line = 0;
}
r = route_new_static(network, section_line, &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,
"Route is invalid, ignoring assignment: %s", route);
return 0;
}
n = NULL;
return 0;
}
int config_parse_destination(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_route_free_ Route *n = NULL;
_cleanup_free_ char *address = NULL;
const char *e;
int r;
assert(filename);
assert(section);
assert(lvalue);
assert(rvalue);
assert(data);
r = route_new_static(network, section_line, &n);
if (r < 0)
return r;
/* Destination=address/prefixlen */
/* address */
e = strchr(rvalue, '/');
if (e) {
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->dst_addr);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Destination is invalid, ignoring assignment: %s", address);
return 0;
}
/* prefixlen */
if (e) {
unsigned i;
r = safe_atou(e + 1, &i);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, EINVAL,
"Route destination prefix length is invalid, "
"ignoring assignment: %s", e + 1);
return 0;
}
n->dst_prefixlen = (unsigned char) i;
} else {
switch (n->family) {
case AF_INET:
n->dst_prefixlen = 32;
break;
case AF_INET6:
n->dst_prefixlen = 128;
break;
}
}
n = NULL;
return 0;
}