151b9b9662
Previously the returned object of constructor functions where sometimes returned as last, sometimes as first and sometimes as second parameter. Let's clean this up a bit. Here are the new rules: 1. The object the new object is derived from is put first, if there is any 2. The object we are creating will be returned in the next arguments 3. This is followed by any additional arguments Rationale: For functions that operate on an object we always put that object first. Constructors should probably not be too different in this regard. Also, if the additional parameters might want to use varargs which suggests to put them last. Note that this new scheme only applies to constructor functions, not to all other functions. We do give a lot of freedom for those. Note that this commit only changes the order of the new functions we added, for old ones we accept the wrong order and leave it like that.
419 lines
12 KiB
C
419 lines
12 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_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_new_addr(link->manager->rtnl, &req, RTM_DELADDR,
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link->ifindex, address->family);
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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_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_new_addr(link->manager->rtnl, &req, RTM_NEWADDR,
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link->ifindex, address->family);
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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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r = sd_rtnl_message_append_in_addr(req, IFA_BROADCAST, &address->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_broadcast(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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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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if (n->family == AF_INET6) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Broadcast is not valid for IPv6 addresses, "
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"ignoring assignment: %s", address);
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return 0;
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}
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r = net_parse_inaddr(address, &n->family, &n->broadcast);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, EINVAL,
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"Broadcast 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_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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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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if (n->family == AF_INET && !n->broadcast.s_addr)
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n->broadcast.s_addr = n->in_addr.in.s_addr |
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htonl(0xfffffffflu >> n->prefixlen);
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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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