#include <linux/if.h>
#include <unistd.h>
-#include "networkd-link.h"
-#include "networkd-netdev.h"
-#include "libudev-private.h"
-#include "udev-util.h"
#include "util.h"
#include "virt.h"
+#include "fileio.h"
#include "bus-util.h"
+#include "udev-util.h"
+#include "libudev-private.h"
#include "network-internal.h"
+#include "networkd-link.h"
+#include "networkd-netdev.h"
#include "conf-parser.h"
-
#include "dhcp-lease-internal.h"
static bool link_dhcp6_enabled(Link *link) {
if (!link->network)
return false;
- return IN_SET(link->network->dhcp, DHCP_SUPPORT_V6, DHCP_SUPPORT_BOTH);
+ return IN_SET(link->network->dhcp, ADDRESS_FAMILY_IPV6, ADDRESS_FAMILY_YES);
}
static bool link_dhcp4_enabled(Link *link) {
if (!link->network)
return false;
- return IN_SET(link->network->dhcp, DHCP_SUPPORT_V4, DHCP_SUPPORT_BOTH);
+ return IN_SET(link->network->dhcp, ADDRESS_FAMILY_IPV4, ADDRESS_FAMILY_YES);
}
static bool link_dhcp4_server_enabled(Link *link) {
return link->network->ipv4ll;
}
+static bool link_lldp_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ if (link->network->bridge)
+ return false;
+
+ return link->network->lldp;
+}
+
+static bool link_ipv4_forward_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ return IN_SET(link->network->ip_forward, ADDRESS_FAMILY_IPV4, ADDRESS_FAMILY_YES);
+}
+
+static bool link_ipv6_forward_enabled(Link *link) {
+ if (link->flags & IFF_LOOPBACK)
+ return false;
+
+ if (!link->network)
+ return false;
+
+ return IN_SET(link->network->ip_forward, ADDRESS_FAMILY_IPV6, ADDRESS_FAMILY_YES);
+}
+
#define FLAG_STRING(string, flag, old, new) \
(((old ^ new) & flag) \
? ((old & flag) ? (" -" string) : (" +" string)) \
if (r < 0)
return -ENOMEM;
+ r = asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d",
+ link->ifindex);
+ if (r < 0)
+ return -ENOMEM;
+
+
r = hashmap_ensure_allocated(&manager->links, NULL);
if (r < 0)
return r;
address_free(address);
}
+ sd_dhcp_server_unref(link->dhcp_server);
sd_dhcp_client_unref(link->dhcp_client);
sd_dhcp_lease_unref(link->dhcp_lease);
unlink(link->lease_file);
free(link->lease_file);
+ sd_lldp_free(link->lldp);
+
+ unlink(link->lldp_file);
+ free(link->lldp_file);
+
sd_ipv4ll_unref(link->ipv4ll);
sd_dhcp6_client_unref(link->dhcp6_client);
sd_icmp6_nd_unref(link->icmp6_router_discovery);
}
}
+ if (link->lldp) {
+
+ k = sd_lldp_stop(link->lldp);
+ if (k < 0) {
+ log_link_warning(link, "Could not stop LLDP : %s",
+ strerror(-r));
+ r = k;
+ }
+ }
+
return r;
}
assert(link);
assert(link->network);
- /* The the first statically configured address if there is any */
+ /* The first statically configured address if there is any */
LIST_FOREACH(addresses, address, link->network->static_addresses) {
if (address->family != AF_INET)
}
static int link_enter_configured(Link *link) {
- int r;
-
assert(link);
assert(link->network);
assert(link->state == LINK_STATE_SETTING_ROUTES);
- if (link_dhcp4_server_enabled(link) &&
- !sd_dhcp_server_is_running(link->dhcp_server)) {
- struct in_addr pool_start;
- Address *address;
-
- address = link_find_dhcp_server_address(link);
- if (!address) {
- log_link_warning(link,
- "Failed to find suitable address for DHCPv4 server instance.");
- link_enter_failed(link);
- return 0;
- }
-
- log_link_debug(link, "offering DHCPv4 leases");
-
- r = sd_dhcp_server_set_address(link->dhcp_server,
- &address->in_addr.in,
- address->prefixlen);
- if (r < 0)
- return r;
-
- /* offer 32 addresses starting from the address following the server address */
- pool_start.s_addr = htobe32(be32toh(address->in_addr.in.s_addr) + 1);
- r = sd_dhcp_server_set_lease_pool(link->dhcp_server,
- &pool_start, 32);
- if (r < 0)
- return r;
-
- /* TODO:
- r = sd_dhcp_server_set_router(link->dhcp_server,
- &main_address->in_addr.in);
- if (r < 0)
- return r;
-
- r = sd_dhcp_server_set_prefixlen(link->dhcp_server,
- main_address->prefixlen);
- if (r < 0)
- return r;
- */
-
- r = sd_dhcp_server_start(link->dhcp_server);
- if (r < 0) {
- log_link_warning(link, "could not start DHCPv4 server "
- "instance: %s", strerror(-r));
-
- link_enter_failed(link);
-
- return 0;
- }
- }
-
log_link_info(link, "link configured");
link->state = LINK_STATE_CONFIGURED;
LIST_FOREACH(addresses, ad, link->network->static_addresses) {
r = address_configure(ad, link, &address_handler);
if (r < 0) {
- log_link_warning(link,
- "could not set addresses: %s",
- strerror(-r));
+ log_link_warning_errno(link, r, "Could not set addresses: %m");
link_enter_failed(link);
return r;
}
link->link_messages ++;
}
+ /* now that we can figure out a default address for the dhcp server,
+ start it */
+ if (link_dhcp4_server_enabled(link)) {
+ struct in_addr pool_start;
+ Address *address;
+
+ address = link_find_dhcp_server_address(link);
+ if (!address) {
+ log_link_warning(link,
+ "Failed to find suitable address for DHCPv4 server instance.");
+ link_enter_failed(link);
+ return 0;
+ }
+
+ r = sd_dhcp_server_set_address(link->dhcp_server,
+ &address->in_addr.in,
+ address->prefixlen);
+ if (r < 0)
+ return r;
+
+ /* offer 32 addresses starting from the address following the server address */
+ pool_start.s_addr = htobe32(be32toh(address->in_addr.in.s_addr) + 1);
+ r = sd_dhcp_server_set_lease_pool(link->dhcp_server,
+ &pool_start, 32);
+ if (r < 0)
+ return r;
+
+ /* TODO:
+ r = sd_dhcp_server_set_router(link->dhcp_server,
+ &main_address->in_addr.in);
+ if (r < 0)
+ return r;
+
+ r = sd_dhcp_server_set_prefixlen(link->dhcp_server,
+ main_address->prefixlen);
+ if (r < 0)
+ return r;
+ */
+
+ r = sd_dhcp_server_start(link->dhcp_server);
+ if (r < 0) {
+ log_link_warning(link, "could not start DHCPv4 server "
+ "instance: %s", strerror(-r));
+
+ link_enter_failed(link);
+
+ return 0;
+ }
+
+ log_link_debug(link, "offering DHCPv4 leases");
+ }
+
if (link->link_messages == 0) {
link_enter_set_routes(link);
} else
return 1;
}
+static int link_set_bridge_fdb(const Link *const link) {
+ FdbEntry *fdb_entry;
+ int r = 0;
+
+ LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
+ r = fdb_entry_configure(link->manager->rtnl, fdb_entry, link->ifindex);
+ if(r < 0) {
+ log_link_error(link, "Failed to add MAC entry to static MAC table: %s", strerror(-r));
+ break;
+ }
+ }
+
+ return r;
+}
+
static int link_set_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
return r;
}
-static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
- Link *link = userdata;
-
- assert(link);
- assert(link->network);
- assert(link->manager);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return;
-
- switch(event) {
- case DHCP6_EVENT_STOP:
- case DHCP6_EVENT_RESEND_EXPIRE:
- case DHCP6_EVENT_RETRANS_MAX:
- case DHCP6_EVENT_IP_ACQUIRE:
- log_link_debug(link, "DHCPv6 event %d", event);
-
- break;
-
- default:
- if (event < 0)
- log_link_warning(link, "DHCPv6 error: %s",
- strerror(-event));
- else
- log_link_warning(link, "DHCPv6 unknown event: %d",
- event);
- return;
- }
-}
-
-static void icmp6_router_handler(sd_icmp6_nd *nd, int event, void *userdata) {
+static void lldp_handler(sd_lldp *lldp, int event, void *userdata) {
Link *link = userdata;
int r;
assert(link->network);
assert(link->manager);
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return;
-
- switch(event) {
- case ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE:
- case ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER:
- return;
-
- case ICMP6_EVENT_ROUTER_ADVERTISMENT_TIMEOUT:
- case ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED:
- break;
-
- default:
- if (event < 0)
- log_link_warning(link, "ICMPv6 error: %s",
- strerror(-event));
- else
- log_link_warning(link, "ICMPv6 unknown event: %d",
- event);
-
- return;
- }
-
- if (link->dhcp6_client)
+ if (event != UPDATE_INFO)
return;
- r = sd_dhcp6_client_new(&link->dhcp6_client);
+ r = sd_lldp_save(link->lldp, link->lldp_file);
if (r < 0)
- return;
+ log_link_warning(link, "could not save LLDP");
- r = sd_dhcp6_client_attach_event(link->dhcp6_client, NULL, 0);
- if (r < 0) {
- link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
- return;
- }
-
- r = sd_dhcp6_client_set_mac(link->dhcp6_client,
- (const uint8_t *) &link->mac,
- sizeof (link->mac), ARPHRD_ETHER);
- if (r < 0) {
- link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
- return;
- }
-
- r = sd_dhcp6_client_set_index(link->dhcp6_client, link->ifindex);
- if (r < 0) {
- link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
- return;
- }
-
- r = sd_dhcp6_client_set_callback(link->dhcp6_client, dhcp6_handler,
- link);
- if (r < 0) {
- link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
- return;
- }
-
- r = sd_dhcp6_client_start(link->dhcp6_client);
- if (r < 0)
- link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
}
static int link_acquire_conf(Link *link) {
}
}
+ if (link_lldp_enabled(link)) {
+ assert(link->lldp);
+
+ log_link_debug(link, "Starting LLDP");
+
+ r = sd_lldp_start(link->lldp);
+ if (r < 0) {
+ log_link_warning(link, "could not start LLDP ");
+ return r;
+ }
+ }
+
return 0;
}
return 0;
}
+static int link_set_ipv4_forward(Link *link) {
+ const char *p = NULL;
+ bool b;
+ int r;
+
+ b = link_ipv4_forward_enabled(link);
+
+ p = strappenda("/proc/sys/net/ipv4/conf/", link->ifname, "/forwarding");
+ r = write_string_file_no_create(p, one_zero(b));
+ if (r < 0)
+ log_link_warning_errno(link, r, "Cannot configure IPv4 forwarding for interface %s: %m", link->ifname);
+
+ if (b) {
+ _cleanup_free_ char *buf = NULL;
+
+ /* If IP forwarding is turned on for this interface,
+ * then propagate this to the global setting. Given
+ * that turning this on has side-effects on other
+ * fields, we'll try to avoid doing this unless
+ * necessary, hence check the previous value
+ * first. Note that we never turn this option off
+ * again, since all interfaces we manage do not do
+ * forwarding anyway by default, and ownership rules
+ * of this control are so unclear. */
+
+ r = read_one_line_file("/proc/sys/net/ipv4/ip_forward", &buf);
+ if (r < 0)
+ log_link_warning_errno(link, r, "Cannot read /proc/sys/net/ipv4/ip_forward: %m");
+ else if (!streq(buf, "1")) {
+ r = write_string_file_no_create("/proc/sys/net/ipv4/ip_forward", "1");
+ if (r < 0)
+ log_link_warning_errno(link, r, "Cannot write /proc/sys/net/ipv4/ip_forward: %m");
+ }
+ }
+
+ return 0;
+}
+
+static int link_set_ipv6_forward(Link *link) {
+ const char *p = NULL;
+ int r;
+
+ p = strappenda("/proc/sys/net/ipv6/conf/", link->ifname, "/forwarding");
+ r = write_string_file_no_create(p, one_zero(link_ipv6_forward_enabled(link)));
+ if (r < 0)
+ log_link_warning_errno(link, r, "Cannot configure IPv6 forwarding for interface: %m");
+
+ return 0;
+}
+
static int link_configure(Link *link) {
int r;
assert(link->network);
assert(link->state == LINK_STATE_PENDING);
+ r = link_set_bridge_fdb(link);
+ if (r < 0)
+ return r;
+
+ r = link_set_ipv4_forward(link);
+ if (r < 0)
+ return r;
+
+ r = link_set_ipv6_forward(link);
+ if (r < 0)
+ return r;
+
if (link_ipv4ll_enabled(link)) {
r = ipv4ll_configure(link);
if (r < 0)
}
if (link_dhcp6_enabled(link)) {
- r = sd_icmp6_nd_new(&link->icmp6_router_discovery);
- if (r < 0)
- return r;
-
- r = sd_icmp6_nd_attach_event(link->icmp6_router_discovery,
- NULL, 0);
+ r = icmp6_configure(link);
if (r < 0)
return r;
+ }
- r = sd_icmp6_nd_set_mac(link->icmp6_router_discovery,
- &link->mac);
+ if (link_lldp_enabled(link)) {
+ r = sd_lldp_new(link->ifindex, link->ifname, &link->mac, &link->lldp);
if (r < 0)
return r;
- r = sd_icmp6_nd_set_index(link->icmp6_router_discovery,
- link->ifindex);
+ r = sd_lldp_attach_event(link->lldp, NULL, 0);
if (r < 0)
return r;
- r = sd_icmp6_nd_set_callback(link->icmp6_router_discovery,
- icmp6_router_handler, link);
+ r = sd_lldp_set_callback(link->lldp,
+ lldp_handler, link);
if (r < 0)
return r;
}
if (network->ipv4ll)
log_link_debug(link, "ignoring IPv4LL for loopback link");
- if (network->dhcp != DHCP_SUPPORT_NONE)
+ if (network->dhcp != ADDRESS_FAMILY_NO)
log_link_debug(link, "ignoring DHCP clients for loopback link");
if (network->dhcp_server)
return 0;
}
+static Address* link_get_equal_address(Link *link, Address *needle) {
+ Address *i;
+
+ assert(link);
+ assert(needle);
+
+ LIST_FOREACH(addresses, i, link->addresses)
+ if (address_equal(i, needle))
+ return i;
+
+ return NULL;
+}
+
int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata) {
Manager *m = userdata;
Link *link = NULL;
uint16_t type;
_cleanup_address_free_ Address *address = NULL;
- Address *ad;
- char buf[INET6_ADDRSTRLEN];
- char valid_buf[FORMAT_TIMESPAN_MAX];
+ Address *existing;
+ char buf[INET6_ADDRSTRLEN], valid_buf[FORMAT_TIMESPAN_MAX];
const char *valid_str = NULL;
- bool address_dropped = false;
int r, ifindex;
assert(rtnl);
r = sd_rtnl_message_addr_get_family(message, &address->family);
if (r < 0 || !IN_SET(address->family, AF_INET, AF_INET6)) {
- log_link_warning(link,
- "rtnl: received address with invalid family, ignoring");
+ log_link_warning(link, "rtnl: received address with invalid family, ignoring");
return 0;
}
r = sd_rtnl_message_addr_get_prefixlen(message, &address->prefixlen);
if (r < 0) {
- log_link_warning(link,
- "rtnl: received address with invalid prefixlen, ignoring");
+ log_link_warning(link, "rtnl: received address with invalid prefixlen, ignoring");
return 0;
}
r = sd_rtnl_message_addr_get_scope(message, &address->scope);
if (r < 0) {
- log_link_warning(link,
- "rtnl: received address with invalid scope, ignoring");
+ log_link_warning(link, "rtnl: received address with invalid scope, ignoring");
return 0;
}
r = sd_rtnl_message_addr_get_flags(message, &address->flags);
if (r < 0) {
- log_link_warning(link,
- "rtnl: received address with invalid flags, ignoring");
+ log_link_warning(link, "rtnl: received address with invalid flags, ignoring");
return 0;
}
switch (address->family) {
case AF_INET:
- r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL,
- &address->in_addr.in);
+ r = sd_rtnl_message_read_in_addr(message, IFA_LOCAL, &address->in_addr.in);
if (r < 0) {
- log_link_warning(link,
- "rtnl: received address without valid address, ignoring");
+ log_link_warning(link, "rtnl: received address without valid address, ignoring");
return 0;
}
break;
case AF_INET6:
- r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS,
- &address->in_addr.in6);
+ r = sd_rtnl_message_read_in6_addr(message, IFA_ADDRESS, &address->in_addr.in6);
if (r < 0) {
- log_link_warning(link,
- "rtnl: received address without valid address, ignoring");
+ log_link_warning(link, "rtnl: received address without valid address, ignoring");
return 0;
}
assert_not_reached("invalid address family");
}
- if (!inet_ntop(address->family, &address->in_addr, buf,
- INET6_ADDRSTRLEN)) {
+ if (!inet_ntop(address->family, &address->in_addr, buf, INET6_ADDRSTRLEN)) {
log_link_warning(link, "could not print address");
return 0;
}
- r = sd_rtnl_message_read_cache_info(message, IFA_CACHEINFO,
- &address->cinfo);
+ r = sd_rtnl_message_read_cache_info(message, IFA_CACHEINFO, &address->cinfo);
if (r >= 0) {
if (address->cinfo.ifa_valid == CACHE_INFO_INFINITY_LIFE_TIME)
valid_str = "ever";
USEC_PER_SEC);
}
- LIST_FOREACH(addresses, ad, link->addresses) {
- if (address_equal(ad, address)) {
- LIST_REMOVE(addresses, link->addresses, ad);
+ existing = link_get_equal_address(link, address);
- address_free(ad);
+ switch (type) {
+ case RTM_NEWADDR:
+ if (existing) {
+ log_link_debug(link, "Updating address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
- address_dropped = true;
- break;
- }
- }
+ existing->scope = address->scope;
+ existing->flags = address->flags;
+ existing->cinfo = address->cinfo;
- switch (type) {
- case RTM_NEWADDR:
- if (!address_dropped)
- log_link_debug(link, "added address: %s/%u (valid for %s)",
- buf, address->prefixlen, valid_str);
- else
- log_link_debug(link, "updated address: %s/%u (valid for %s)",
- buf, address->prefixlen, valid_str);
+ } else {
+ log_link_debug(link, "Adding address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
- LIST_PREPEND(addresses, link->addresses, address);
- address = NULL;
+ LIST_PREPEND(addresses, link->addresses, address);
+ address_establish(address, link);
- link_save(link);
+ address = NULL;
+
+ link_save(link);
+ }
break;
+
case RTM_DELADDR:
- if (address_dropped) {
- log_link_debug(link, "removed address: %s/%u (valid for %s)",
- buf, address->prefixlen, valid_str);
- link_save(link);
+ if (existing) {
+ log_link_debug(link, "Removing address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
+ address_release(existing, link);
+ LIST_REMOVE(addresses, link->addresses, existing);
+ address_free(existing);
} else
- log_link_warning(link,
- "removing non-existent address: %s/%u (valid for %s)",
- buf, address->prefixlen, valid_str);
+ log_link_warning(link, "Removing non-existent address: %s/%u (valid for %s)", buf, address->prefixlen, valid_str);
break;
default:
} else
unlink(link->lease_file);
+ if (link->lldp) {
+ assert(link->network);
+
+ r = sd_lldp_save(link->lldp, link->lldp_file);
+ if (r < 0)
+ goto fail;
+
+ fprintf(f,
+ "LLDP_FILE=%s\n",
+ link->lldp_file);
+ } else
+ unlink(link->lldp_file);
+
r = fflush_and_check(f);
if (r < 0)
goto fail;
~ianmdlvl / elogind.git / blobdiff