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network-generator.c
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1317 lines (1006 loc) · 35.8 KB
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "fd-util.h"
#include "fileio.h"
#include "hostname-util.h"
#include "log.h"
#include "macro.h"
#include "netif-naming-scheme.h"
#include "network-generator.h"
#include "parse-util.h"
#include "proc-cmdline.h"
#include "socket-util.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
/*
# .network
ip={dhcp|on|any|dhcp6|auto6|either6|link6}
ip=<interface>:{dhcp|on|any|dhcp6|auto6|link6}[:[<mtu>][:<macaddr>]]
ip=<client-IP>:[<peer>]:<gateway-IP>:<netmask>:<client_hostname>:<interface>:{none|off|dhcp|on|any|dhcp6|auto6|link6|ibft}[:[<mtu>][:<macaddr>]]
ip=<client-IP>:[<peer>]:<gateway-IP>:<netmask>:<client_hostname>:<interface>:{none|off|dhcp|on|any|dhcp6|auto6|link6|ibft}[:[<dns1>][:<dns2>]]
rd.route=<net>/<netmask>:<gateway>[:<interface>]
nameserver=<IP> [nameserver=<IP> ...]
rd.peerdns=0
# .link
ifname=<interface>:<MAC>
net.ifname-policy=policy1[,policy2,...][,<MAC>] # This is an original rule, not supported by other tools.
# .netdev
vlan=<vlanname>:<phydevice>
bond=<bondname>[:<bondslaves>:[:<options>[:<mtu>]]]
team=<teammaster>:<teamslaves> # not supported
bridge=<bridgename>:<ethnames>
# ignored
bootdev=<interface>
BOOTIF=<MAC>
rd.bootif=0
biosdevname=0
rd.neednet=1
*/
static const char * const dracut_dhcp_type_table[_DHCP_TYPE_MAX] = {
[DHCP_TYPE_NONE] = "none",
[DHCP_TYPE_OFF] = "off",
[DHCP_TYPE_ON] = "on",
[DHCP_TYPE_ANY] = "any",
[DHCP_TYPE_DHCP4] = "dhcp",
[DHCP_TYPE_DHCP6] = "dhcp6",
[DHCP_TYPE_AUTO6] = "auto6",
[DHCP_TYPE_EITHER6] = "either6",
[DHCP_TYPE_IBFT] = "ibft",
[DHCP_TYPE_LINK6] = "link6",
};
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(dracut_dhcp_type, DHCPType);
static const char * const networkd_dhcp_type_table[_DHCP_TYPE_MAX] = {
[DHCP_TYPE_NONE] = "no",
[DHCP_TYPE_OFF] = "no",
[DHCP_TYPE_ON] = "yes",
[DHCP_TYPE_ANY] = "yes",
[DHCP_TYPE_DHCP4] = "ipv4",
[DHCP_TYPE_DHCP6] = "ipv6",
[DHCP_TYPE_AUTO6] = "no", /* TODO: enable other setting? */
[DHCP_TYPE_EITHER6] = "ipv6", /* TODO: enable other setting? */
[DHCP_TYPE_IBFT] = "no",
[DHCP_TYPE_LINK6] = "no",
};
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(networkd_dhcp_type, DHCPType);
static Address *address_free(Address *address) {
if (!address)
return NULL;
if (address->network)
LIST_REMOVE(addresses, address->network->addresses, address);
return mfree(address);
}
static int address_new(Network *network, int family, unsigned char prefixlen,
union in_addr_union *addr, union in_addr_union *peer, Address **ret) {
Address *address;
assert(network);
address = new(Address, 1);
if (!address)
return -ENOMEM;
*address = (Address) {
.family = family,
.prefixlen = prefixlen,
.address = *addr,
.peer = *peer,
};
LIST_PREPEND(addresses, network->addresses, address);
address->network = network;
if (ret)
*ret = address;
return 0;
}
static Route *route_free(Route *route) {
if (!route)
return NULL;
if (route->network)
LIST_REMOVE(routes, route->network->routes, route);
return mfree(route);
}
static int route_new(Network *network, int family, unsigned char prefixlen,
union in_addr_union *dest, union in_addr_union *gateway, Route **ret) {
Route *route;
assert(network);
route = new(Route, 1);
if (!route)
return -ENOMEM;
*route = (Route) {
.family = family,
.prefixlen = prefixlen,
.dest = dest ? *dest : IN_ADDR_NULL,
.gateway = *gateway,
};
LIST_PREPEND(routes, network->routes, route);
route->network = network;
if (ret)
*ret = route;
return 0;
}
static Network *network_free(Network *network) {
Address *address;
Route *route;
if (!network)
return NULL;
free(network->ifname);
free(network->hostname);
strv_free(network->dns);
free(network->vlan);
free(network->bridge);
free(network->bond);
while ((address = network->addresses))
address_free(address);
while ((route = network->routes))
route_free(route);
return mfree(network);
}
DEFINE_TRIVIAL_CLEANUP_FUNC(Network*, network_free);
static int network_new(Context *context, const char *name, Network **ret) {
_cleanup_(network_freep) Network *network = NULL;
_cleanup_free_ char *ifname = NULL;
int r;
assert(context);
if (!isempty(name) && !ifname_valid(name))
return -EINVAL;
ifname = strdup(name);
if (!ifname)
return -ENOMEM;
network = new(Network, 1);
if (!network)
return -ENOMEM;
*network = (Network) {
.ifname = TAKE_PTR(ifname),
.dhcp_type = _DHCP_TYPE_INVALID,
.dhcp_use_dns = -1,
};
r = hashmap_ensure_put(&context->networks_by_name, &string_hash_ops, network->ifname, network);
if (r < 0)
return r;
if (ret)
*ret = network;
TAKE_PTR(network);
return 0;
}
Network *network_get(Context *context, const char *ifname) {
return hashmap_get(context->networks_by_name, ifname);
}
static NetDev *netdev_free(NetDev *netdev) {
if (!netdev)
return NULL;
free(netdev->ifname);
free(netdev->kind);
return mfree(netdev);
}
DEFINE_TRIVIAL_CLEANUP_FUNC(NetDev*, netdev_free);
static int netdev_new(Context *context, const char *_kind, const char *_ifname, NetDev **ret) {
_cleanup_(netdev_freep) NetDev *netdev = NULL;
_cleanup_free_ char *kind = NULL, *ifname = NULL;
int r;
assert(context);
if (!ifname_valid(_ifname))
return -EINVAL;
kind = strdup(_kind);
if (!kind)
return -ENOMEM;
ifname = strdup(_ifname);
if (!ifname)
return -ENOMEM;
netdev = new(NetDev, 1);
if (!netdev)
return -ENOMEM;
*netdev = (NetDev) {
.kind = TAKE_PTR(kind),
.ifname = TAKE_PTR(ifname),
};
r = hashmap_ensure_put(&context->netdevs_by_name, &string_hash_ops, netdev->ifname, netdev);
if (r < 0)
return r;
if (ret)
*ret = netdev;
TAKE_PTR(netdev);
return 0;
}
NetDev *netdev_get(Context *context, const char *ifname) {
return hashmap_get(context->netdevs_by_name, ifname);
}
static Link *link_free(Link *link) {
if (!link)
return NULL;
free(link->filename);
free(link->ifname);
strv_free(link->policies);
strv_free(link->alt_policies);
return mfree(link);
}
DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
static int link_new(
Context *context,
const char *name,
const struct hw_addr_data *mac,
Link **ret) {
_cleanup_(link_freep) Link *link = NULL;
_cleanup_free_ char *ifname = NULL, *filename = NULL;
int r;
assert(context);
assert(mac);
if (name) {
if (!ifname_valid(name))
return -EINVAL;
ifname = strdup(name);
if (!ifname)
return -ENOMEM;
filename = strdup(name);
if (!filename)
return -ENOMEM;
}
if (!filename) {
filename = strdup(hw_addr_is_null(mac) ? "default" :
HW_ADDR_TO_STR_FULL(mac, HW_ADDR_TO_STRING_NO_COLON));
if (!filename)
return -ENOMEM;
}
link = new(Link, 1);
if (!link)
return -ENOMEM;
*link = (Link) {
.filename = TAKE_PTR(filename),
.ifname = TAKE_PTR(ifname),
.mac = *mac,
};
r = hashmap_ensure_put(&context->links_by_filename, &string_hash_ops, link->filename, link);
if (r < 0)
return r;
if (ret)
*ret = link;
TAKE_PTR(link);
return 0;
}
Link *link_get(Context *context, const char *filename) {
assert(context);
assert(filename);
return hashmap_get(context->links_by_filename, filename);
}
static int network_set_dhcp_type(Context *context, const char *ifname, const char *dhcp_type) {
Network *network;
DHCPType t;
int r;
t = dracut_dhcp_type_from_string(dhcp_type);
if (t < 0)
return t;
network = network_get(context, ifname);
if (!network) {
r = network_new(context, ifname, &network);
if (r < 0)
return r;
}
network->dhcp_type = t;
return 0;
}
static int network_set_hostname(Context *context, const char *ifname, const char *hostname) {
Network *network;
network = network_get(context, ifname);
if (!network)
return -ENODEV;
return free_and_strdup(&network->hostname, hostname);
}
static int network_set_mtu(Context *context, const char *ifname, int family, const char *mtu) {
Network *network;
network = network_get(context, ifname);
if (!network)
return -ENODEV;
return parse_mtu(family, mtu, &network->mtu);
}
static int network_set_mac_address(Context *context, const char *ifname, const char *mac) {
Network *network;
network = network_get(context, ifname);
if (!network)
return -ENODEV;
return parse_ether_addr(mac, &network->mac);
}
static int network_set_address(Context *context, const char *ifname, int family, unsigned char prefixlen,
union in_addr_union *addr, union in_addr_union *peer) {
Network *network;
if (!in_addr_is_set(family, addr))
return 0;
network = network_get(context, ifname);
if (!network)
return -ENODEV;
return address_new(network, family, prefixlen, addr, peer, NULL);
}
static int network_set_route(Context *context, const char *ifname, int family, unsigned char prefixlen,
union in_addr_union *dest, union in_addr_union *gateway) {
Network *network;
int r;
if (!in_addr_is_set(family, gateway))
return 0;
network = network_get(context, ifname);
if (!network) {
r = network_new(context, ifname, &network);
if (r < 0)
return r;
}
return route_new(network, family, prefixlen, dest, gateway, NULL);
}
static int network_set_dns(Context *context, const char *ifname, const char *dns) {
union in_addr_union a;
Network *network;
int family, r;
r = in_addr_from_string_auto(dns, &family, &a);
if (r < 0)
return r;
network = network_get(context, ifname);
if (!network) {
r = network_new(context, ifname, &network);
if (r < 0)
return r;
}
return strv_extend(&network->dns, dns);
}
static int network_set_dhcp_use_dns(Context *context, const char *ifname, bool value) {
Network *network;
int r;
network = network_get(context, ifname);
if (!network) {
r = network_new(context, ifname, &network);
if (r < 0)
return r;
}
network->dhcp_use_dns = value;
return 0;
}
static int network_set_vlan(Context *context, const char *ifname, const char *value) {
Network *network;
int r;
network = network_get(context, ifname);
if (!network) {
r = network_new(context, ifname, &network);
if (r < 0)
return r;
}
return free_and_strdup(&network->vlan, value);
}
static int network_set_bridge(Context *context, const char *ifname, const char *value) {
Network *network;
int r;
network = network_get(context, ifname);
if (!network) {
r = network_new(context, ifname, &network);
if (r < 0)
return r;
}
return free_and_strdup(&network->bridge, value);
}
static int network_set_bond(Context *context, const char *ifname, const char *value) {
Network *network;
int r;
network = network_get(context, ifname);
if (!network) {
r = network_new(context, ifname, &network);
if (r < 0)
return r;
}
return free_and_strdup(&network->bond, value);
}
static int parse_cmdline_ip_mtu_mac(Context *context, const char *ifname, int family, const char *value) {
const char *mtu, *p;
int r;
/* [<mtu>][:<macaddr>] */
p = strchr(value, ':');
if (!p)
mtu = value;
else
mtu = strndupa_safe(value, p - value);
r = network_set_mtu(context, ifname, family, mtu);
if (r < 0)
return r;
if (!p)
return 0;
r = network_set_mac_address(context, ifname, p + 1);
if (r < 0)
return r;
return 0;
}
static int parse_ip_address_one(int family, const char **value, union in_addr_union *ret) {
const char *p = *value, *q, *buf;
int r;
if (p[0] == ':') {
*value = p + 1;
return 0;
}
if (family == AF_INET6) {
if (p[0] != '[')
return -EINVAL;
q = strchr(p + 1, ']');
if (!q)
return -EINVAL;
if (q[1] != ':')
return -EINVAL;
buf = strndupa_safe(p + 1, q - p - 1);
p = q + 2;
} else {
q = strchr(p, ':');
if (!q)
return -EINVAL;
buf = strndupa_safe(p, q - p);
p = q + 1;
}
r = in_addr_from_string(family, buf, ret);
if (r < 0)
return r;
*value = p;
return 1;
}
static int parse_netmask_or_prefixlen(int family, const char **value, unsigned char *ret) {
union in_addr_union netmask;
const char *p, *q;
int r;
r = parse_ip_address_one(family, value, &netmask);
if (r > 0) {
if (family == AF_INET6)
/* TODO: Not supported yet. */
return -EINVAL;
*ret = in4_addr_netmask_to_prefixlen(&netmask.in);
} else if (r == 0)
*ret = family == AF_INET6 ? 128 : 32;
else {
p = strchr(*value, ':');
if (!p)
return -EINVAL;
q = strndupa_safe(*value, p - *value);
r = safe_atou8(q, ret);
if (r < 0)
return r;
*value = p + 1;
}
return 0;
}
static int parse_cmdline_ip_address(Context *context, int family, const char *value) {
union in_addr_union addr = {}, peer = {}, gateway = {};
const char *hostname = NULL, *ifname, *dhcp_type, *dns, *p;
unsigned char prefixlen;
int r;
/* ip=<client-IP>:[<peer>]:<gateway-IP>:<netmask>:<client_hostname>:<interface>:{none|off|dhcp|on|any|dhcp6|auto6|ibft|link6}[:[<mtu>][:<macaddr>]]
* ip=<client-IP>:[<peer>]:<gateway-IP>:<netmask>:<client_hostname>:<interface>:{none|off|dhcp|on|any|dhcp6|auto6|ibft|link6}[:[<dns1>][:<dns2>]] */
r = parse_ip_address_one(family, &value, &addr);
if (r < 0)
return r;
r = parse_ip_address_one(family, &value, &peer);
if (r < 0)
return r;
r = parse_ip_address_one(family, &value, &gateway);
if (r < 0)
return r;
r = parse_netmask_or_prefixlen(family, &value, &prefixlen);
if (r < 0)
return r;
/* hostname */
p = strchr(value, ':');
if (!p)
return -EINVAL;
if (p != value) {
hostname = strndupa_safe(value, p - value);
if (!hostname_is_valid(hostname, 0))
return -EINVAL;
}
value = p + 1;
/* ifname */
p = strchr(value, ':');
if (!p)
return -EINVAL;
ifname = strndupa_safe(value, p - value);
value = p + 1;
/* dhcp_type */
p = strchr(value, ':');
if (!p)
dhcp_type = value;
else
dhcp_type = strndupa_safe(value, p - value);
r = network_set_dhcp_type(context, ifname, dhcp_type);
if (r < 0)
return r;
/* set values */
r = network_set_hostname(context, ifname, hostname);
if (r < 0)
return r;
r = network_set_address(context, ifname, family, prefixlen, &addr, &peer);
if (r < 0)
return r;
r = network_set_route(context, ifname, family, 0, NULL, &gateway);
if (r < 0)
return r;
if (!p)
return 0;
/* First, try [<mtu>][:<macaddr>] */
r = parse_cmdline_ip_mtu_mac(context, ifname, AF_UNSPEC, p + 1);
if (r >= 0)
return 0;
/* Next, try [<dns1>][:<dns2>] */
value = p + 1;
p = strchr(value, ':');
if (!p) {
r = network_set_dns(context, ifname, value);
if (r < 0)
return r;
} else {
dns = strndupa_safe(value, p - value);
r = network_set_dns(context, ifname, dns);
if (r < 0)
return r;
r = network_set_dns(context, ifname, p + 1);
if (r < 0)
return r;
}
return 0;
}
static int parse_cmdline_ip_interface(Context *context, const char *value) {
const char *ifname, *dhcp_type, *p;
int r;
/* ip=<interface>:{dhcp|on|any|dhcp6|auto6|link6}[:[<mtu>][:<macaddr>]] */
p = strchr(value, ':');
if (!p)
return -EINVAL;
ifname = strndupa_safe(value, p - value);
value = p + 1;
p = strchr(value, ':');
if (!p)
dhcp_type = value;
else
dhcp_type = strndupa_safe(value, p - value);
r = network_set_dhcp_type(context, ifname, dhcp_type);
if (r < 0)
return r;
if (!p)
return 0;
return parse_cmdline_ip_mtu_mac(context, ifname, AF_UNSPEC, p + 1);
}
static int parse_cmdline_ip(Context *context, const char *key, const char *value) {
const char *p;
int r;
if (proc_cmdline_value_missing(key, value))
return -EINVAL;
p = strchr(value, ':');
if (!p)
/* ip={dhcp|on|any|dhcp6|auto6|either6|link6} */
return network_set_dhcp_type(context, "", value);
if (value[0] == '[')
return parse_cmdline_ip_address(context, AF_INET6, value);
r = parse_cmdline_ip_address(context, AF_INET, value);
if (r < 0)
return parse_cmdline_ip_interface(context, value);
return 0;
}
static int parse_cmdline_rd_route(Context *context, const char *key, const char *value) {
union in_addr_union addr = {}, gateway = {};
unsigned char prefixlen;
const char *buf, *p;
int family, r;
/* rd.route=<net>/<netmask>:<gateway>[:<interface>] */
if (proc_cmdline_value_missing(key, value))
return -EINVAL;
if (value[0] == '[') {
p = strchr(value, ']');
if (!p)
return -EINVAL;
if (p[1] != ':')
return -EINVAL;
buf = strndupa_safe(value + 1, p - value - 1);
value = p + 2;
family = AF_INET6;
} else {
p = strchr(value, ':');
if (!p)
return -EINVAL;
buf = strndupa_safe(value, p - value);
value = p + 1;
family = AF_INET;
}
r = in_addr_prefix_from_string(buf, family, &addr, &prefixlen);
if (r < 0)
return r;
p = strchr(value, ':');
if (!p)
value = strjoina(value, ":");
r = parse_ip_address_one(family, &value, &gateway);
if (r < 0)
return r;
return network_set_route(context, value, family, prefixlen, &addr, &gateway);
}
static int parse_cmdline_nameserver(Context *context, const char *key, const char *value) {
if (proc_cmdline_value_missing(key, value))
return -EINVAL;
return network_set_dns(context, "", value);
}
static int parse_cmdline_rd_peerdns(Context *context, const char *key, const char *value) {
int r;
if (proc_cmdline_value_missing(key, value))
return network_set_dhcp_use_dns(context, "", true);
r = parse_boolean(value);
if (r < 0)
return r;
return network_set_dhcp_use_dns(context, "", r);
}
static int parse_cmdline_vlan(Context *context, const char *key, const char *value) {
const char *name, *p;
NetDev *netdev;
int r;
if (proc_cmdline_value_missing(key, value))
return -EINVAL;
p = strchr(value, ':');
if (!p)
return -EINVAL;
name = strndupa_safe(value, p - value);
netdev = netdev_get(context, name);
if (!netdev) {
r = netdev_new(context, "vlan", name, &netdev);
if (r < 0)
return r;
}
return network_set_vlan(context, p + 1, name);
}
static int parse_cmdline_bridge(Context *context, const char *key, const char *value) {
const char *name, *p;
NetDev *netdev;
int r;
if (proc_cmdline_value_missing(key, value))
return -EINVAL;
p = strchr(value, ':');
if (!p)
return -EINVAL;
name = strndupa_safe(value, p - value);
netdev = netdev_get(context, name);
if (!netdev) {
r = netdev_new(context, "bridge", name, &netdev);
if (r < 0)
return r;
}
p++;
if (isempty(p))
return -EINVAL;
for (;;) {
_cleanup_free_ char *word = NULL;
r = extract_first_word(&p, &word, ",", 0);
if (r <= 0)
return r;
r = network_set_bridge(context, word, name);
if (r < 0)
return r;
}
}
static int parse_cmdline_bond(Context *context, const char *key, const char *value) {
const char *name, *slaves, *p;
NetDev *netdev;
int r;
if (proc_cmdline_value_missing(key, value))
return -EINVAL;
p = strchr(value, ':');
if (!p)
return -EINVAL;
name = strndupa_safe(value, p - value);
netdev = netdev_get(context, name);
if (!netdev) {
r = netdev_new(context, "bond", name, &netdev);
if (r < 0)
return r;
}
value = p + 1;
p = strchr(value, ':');
if (!p)
slaves = value;
else
slaves = strndupa_safe(value, p - value);
if (isempty(slaves))
return -EINVAL;
for (const char *q = slaves; ; ) {
_cleanup_free_ char *word = NULL;
r = extract_first_word(&q, &word, ",", 0);
if (r == 0)
break;
if (r < 0)
return r;
r = network_set_bond(context, word, name);
if (r < 0)
return r;
}
if (!p)
return 0;
value = p + 1;
p = strchr(value, ':');
if (!p)
/* TODO: set bonding options */
return 0;
return parse_mtu(AF_UNSPEC, p + 1, &netdev->mtu);
}
static int parse_cmdline_ifname(Context *context, const char *key, const char *value) {
struct hw_addr_data mac;
const char *name, *p;
int r;
/* ifname=<interface>:<MAC> */
if (proc_cmdline_value_missing(key, value))
return -EINVAL;
p = strchr(value, ':');
if (!p)
return -EINVAL;
name = strndupa_safe(value, p - value);
r = parse_hw_addr(p + 1, &mac);
if (r < 0)
return r;
return link_new(context, name, &mac, NULL);
}
static int parse_cmdline_ifname_policy(Context *context, const char *key, const char *value) {
_cleanup_strv_free_ char **policies = NULL, **alt_policies = NULL;
struct hw_addr_data mac = HW_ADDR_NULL;
Link *link;
int r;
/* net.ifname-policy=policy1[,policy2,...][,<MAC>] */
if (proc_cmdline_value_missing(key, value))
return -EINVAL;
for (const char *q = value; ; ) {
_cleanup_free_ char *word = NULL;
NamePolicy p;
r = extract_first_word(&q, &word, ",", 0);
if (r == 0)
break;
if (r < 0)
return r;
p = name_policy_from_string(word);
if (p < 0) {
r = parse_hw_addr(word, &mac);
if (r < 0)
return r;
if (hw_addr_is_null(&mac))
return -EINVAL;
if (!isempty(q))
return -EINVAL;
break;
}
if (alternative_names_policy_from_string(word) >= 0) {
r = strv_extend(&alt_policies, word);
if (r < 0)
return r;
}
r = strv_consume(&policies, TAKE_PTR(word));
if (r < 0)
return r;
}
if (strv_isempty(policies))
return -EINVAL;
r = link_new(context, NULL, &mac, &link);
if (r < 0)
return r;