375 lines
11 KiB
C
375 lines
11 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Tom Gundersen <teg@jklm.no>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <net/if.h>
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#include "networkd.h"
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#include "utf8.h"
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#include "util.h"
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#include "conf-parser.h"
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#include "net-util.h"
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int address_new_static(Network *network, unsigned section, Address **ret) {
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_cleanup_address_free_ Address *address = NULL;
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if (section) {
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uint64_t key = section;
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address = hashmap_get(network->addresses_by_section, &key);
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if (address) {
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*ret = address;
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address = NULL;
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return 0;
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}
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}
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address = new0(Address, 1);
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if (!address)
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return -ENOMEM;
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address->family = AF_UNSPEC;
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address->network = network;
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LIST_PREPEND(static_addresses, network->static_addresses, address);
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if (section) {
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address->section = section;
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hashmap_put(network->addresses_by_section, &address->section, address);
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}
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*ret = address;
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address = NULL;
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return 0;
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}
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int address_new_dynamic(Address **ret) {
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_cleanup_address_free_ Address *address = NULL;
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address = new0(Address, 1);
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if (!address)
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return -ENOMEM;
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address->family = AF_UNSPEC;
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*ret = address;
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address = NULL;
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return 0;
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}
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void address_free(Address *address) {
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if (!address)
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return;
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if (address->network) {
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LIST_REMOVE(static_addresses, address->network->static_addresses, address);
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if (address->section)
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hashmap_remove(address->network->addresses_by_section,
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&address->section);
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}
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free(address);
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}
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int address_drop(Address *address, Link *link,
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sd_rtnl_message_handler_t callback) {
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_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
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int r;
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assert(address);
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assert(address->family == AF_INET || address->family == AF_INET6);
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assert(link);
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assert(link->ifindex > 0);
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assert(link->manager);
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assert(link->manager->rtnl);
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r = sd_rtnl_message_addr_new(RTM_DELADDR, link->ifindex, address->family, &req);
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if (r < 0) {
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log_error("Could not allocate RTM_DELADDR message: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
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if (r < 0) {
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log_error("Could not set prefixlen: %s", strerror(-r));
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return r;
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}
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if (address->family == AF_INET)
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r = sd_rtnl_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
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else if (address->family == AF_INET6)
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r = sd_rtnl_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
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if (r < 0) {
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log_error("Could not append IFA_LOCAL attribute: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
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if (r < 0) {
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log_error("Could not send rtnetlink message: %s", strerror(-r));
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return r;
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}
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return 0;
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}
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int address_configure(Address *address, Link *link,
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sd_rtnl_message_handler_t callback) {
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_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
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int r;
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assert(address);
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assert(address->family == AF_INET || address->family == AF_INET6);
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assert(link);
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assert(link->ifindex > 0);
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assert(link->manager);
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assert(link->manager->rtnl);
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r = sd_rtnl_message_addr_new(RTM_NEWADDR, link->ifindex,
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address->family, &req);
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if (r < 0) {
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log_error("Could not allocate RTM_NEWADDR message: %s",
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strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
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if (r < 0) {
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log_error("Could not set prefixlen: %s", strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_flags(req, IFA_F_PERMANENT);
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if (r < 0) {
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log_error("Could not set flags: %s", strerror(-r));
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return r;
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}
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r = sd_rtnl_message_addr_set_scope(req, RT_SCOPE_UNIVERSE);
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if (r < 0) {
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log_error("Could not set scope: %s", strerror(-r));
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return r;
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}
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if (address->family == AF_INET)
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r = sd_rtnl_message_append_in_addr(req, IFA_LOCAL, &address->in_addr.in);
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else if (address->family == AF_INET6)
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r = sd_rtnl_message_append_in6_addr(req, IFA_LOCAL, &address->in_addr.in6);
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if (r < 0) {
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log_error("Could not append IFA_LOCAL attribute: %s",
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strerror(-r));
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return r;
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}
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if (address->family == AF_INET) {
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struct in_addr broadcast;
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broadcast.s_addr = address->in_addr.in.s_addr | address->netmask.s_addr;
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r = sd_rtnl_message_append_in_addr(req, IFA_BROADCAST, &broadcast);
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if (r < 0) {
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log_error("Could not append IFA_BROADCAST attribute: %s",
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strerror(-r));
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return r;
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}
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}
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if (address->label) {
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r = sd_rtnl_message_append_string(req, IFA_LABEL, address->label);
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if (r < 0) {
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log_error("Could not append IFA_LABEL attribute: %s",
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strerror(-r));
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return r;
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}
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}
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r = sd_rtnl_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
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if (r < 0) {
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log_error("Could not send rtnetlink message: %s", strerror(-r));
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return r;
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}
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return 0;
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}
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int config_parse_dns(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Address **dns = data;
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_cleanup_address_free_ Address *n = NULL;
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int r;
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assert(filename);
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assert(section);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = address_new_dynamic(&n);
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if (r < 0)
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return r;
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r = net_parse_inaddr(rvalue, &n->family, &n->in_addr);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"DNS address is invalid, ignoring assignment: %s", rvalue);
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return 0;
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}
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*dns = n;
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n = NULL;
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return 0;
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}
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int config_parse_address(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = userdata;
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_cleanup_address_free_ Address *n = NULL;
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_cleanup_free_ char *address = NULL;
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const char *e;
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int r;
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assert(filename);
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assert(section);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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if (streq(section, "Network")) {
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/* we are not in an Address section, so treat
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* this as the special '0' section */
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section_line = 0;
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}
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r = address_new_static(network, section_line, &n);
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if (r < 0)
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return r;
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/* Address=address/prefixlen */
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/* prefixlen */
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e = strchr(rvalue, '/');
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if (e) {
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unsigned i;
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r = safe_atou(e + 1, &i);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Interface prefix length is invalid, "
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"ignoring assignment: %s", e + 1);
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return 0;
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}
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n->prefixlen = (unsigned char) i;
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n->netmask.s_addr = htonl(0xfffffffflu >> n->prefixlen);
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address = strndup(rvalue, e - rvalue);
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if (!address)
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return log_oom();
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} else {
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address = strdup(rvalue);
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if (!address)
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return log_oom();
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}
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r = net_parse_inaddr(address, &n->family, &n->in_addr);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Address is invalid, ignoring assignment: %s", address);
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return 0;
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}
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n = NULL;
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return 0;
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}
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int config_parse_label(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = userdata;
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_cleanup_address_free_ Address *n = NULL;
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char *label;
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int r;
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assert(filename);
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assert(section);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = address_new_static(network, section_line, &n);
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if (r < 0)
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return r;
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label = strdup(rvalue);
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if (!label)
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return log_oom();
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if (!ascii_is_valid(label) || strlen(label) >= IFNAMSIZ) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Interface label is not ASCII clean or is too"
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" long, ignoring assignment: %s", rvalue);
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free(label);
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return 0;
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}
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free(n->label);
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if (*label)
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n->label = label;
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else {
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free(label);
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n->label = NULL;
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}
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n = NULL;
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return 0;
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}
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