#include "libudev-private.h"
#include "util.h"
#include "bus-util.h"
-#include "net-util.h"
+#include "network-internal.h"
#include "dhcp-lease-internal.h"
+static int ipv4ll_address_update(Link *link, bool deprecate);
+static bool ipv4ll_is_bound(sd_ipv4ll *ll);
+
int link_new(Manager *manager, struct udev_device *device, Link **ret) {
_cleanup_link_free_ Link *link = NULL;
- const char *mac;
- struct ether_addr *mac_addr;
const char *ifname;
int r;
if (link->ifindex <= 0)
return -EINVAL;
- r = asprintf(&link->state_file, "/run/systemd/network/links/%u",
- (unsigned) link->ifindex);
+ r = asprintf(&link->state_file, "/run/systemd/network/links/%"PRIu64,
+ link->ifindex);
if (r < 0)
- return r;
-
- mac = udev_device_get_sysattr_value(device, "address");
- if (mac) {
- mac_addr = ether_aton(mac);
- if (mac_addr)
- memcpy(&link->mac, mac_addr, sizeof(struct ether_addr));
- }
+ return -ENOMEM;
ifname = udev_device_get_sysname(device);
link->ifname = strdup(ifname);
if (r < 0)
return r;
+ link->udev_device = udev_device_ref(device);
+
*ret = link;
link = NULL;
free(link->ifname);
free(link->state_file);
+ udev_device_unref(link->udev_device);
+
free(link);
}
static int link_enter_set_routes(Link *link) {
Route *rt;
- struct in_addr a;
int r;
assert(link);
link->state = LINK_STATE_SETTING_ROUTES;
if (!link->network->static_routes && !link->dhcp_lease &&
- (!link->ipv4ll || sd_ipv4ll_get_address(link->ipv4ll, &a) < 0))
+ (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false))
return link_enter_configured(link);
log_debug_link(link, "setting routes");
if (link->dhcp_lease) {
_cleanup_route_free_ Route *route = NULL;
+ _cleanup_route_free_ Route *route_gw = NULL;
struct in_addr gateway;
r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
return r;
}
+ r = route_new_dynamic(&route_gw);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate route: %s",
+ strerror(-r));
+ return r;
+ }
+
+ /* The dhcp netmask may mask out the gateway. Add an explicit
+ * route for the gw host so that we can route no matter the
+ * netmask or existing kernel route tables. */
+ route_gw->family = AF_INET;
+ route_gw->dst_addr.in = gateway;
+ route_gw->dst_prefixlen = 32;
+ route_gw->scope = RT_SCOPE_LINK;
+
+ r = route_configure(route_gw, link, &route_handler);
+ if (r < 0) {
+ log_warning_link(link,
+ "could not set host route: %s", strerror(-r));
+ return r;
+ }
+
+ link->route_messages ++;
+
route->family = AF_INET;
route->in_addr.in = gateway;
static int link_enter_set_addresses(Link *link) {
Address *ad;
- struct in_addr a;
int r;
assert(link);
link->state = LINK_STATE_SETTING_ADDRESSES;
if (!link->network->static_addresses && !link->dhcp_lease &&
- (!link->ipv4ll || sd_ipv4ll_get_address(link->ipv4ll, &a) < 0))
+ (!link->ipv4ll || ipv4ll_is_bound(link->ipv4ll) == false))
return link_enter_set_routes(link);
log_debug_link(link, "setting addresses");
return 0;
}
+static int address_update_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(m);
+ assert(link);
+ assert(link->ifname);
+
+ if (link->state == LINK_STATE_FAILED)
+ return 1;
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -ENOENT)
+ log_struct_link(LOG_WARNING, link,
+ "MESSAGE=%s: could not update address: %s",
+ link->ifname, strerror(-r),
+ "ERRNO=%d", -r,
+ NULL);
+
+ return 0;
+}
+
static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
Link *link = userdata;
int r;
static int dhcp_lease_lost(Link *link) {
_cleanup_address_free_ Address *address = NULL;
+ _cleanup_route_free_ Route *route_gw = NULL;
+ _cleanup_route_free_ Route *route = NULL;
struct in_addr addr;
struct in_addr netmask;
+ struct in_addr gateway;
unsigned prefixlen;
int r;
if (r >= 0) {
sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
+ sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
prefixlen = net_netmask_to_prefixlen(&netmask);
+ r = route_new_dynamic(&route_gw);
+ if (r >= 0) {
+ route_gw->family = AF_INET;
+ route_gw->dst_addr.in = gateway;
+ route_gw->dst_prefixlen = 32;
+ route_gw->scope = RT_SCOPE_LINK;
+
+ route_drop(route_gw, link, &route_drop_handler);
+ }
+
+ r = route_new_dynamic(&route);
+ if (r >= 0) {
+ route->family = AF_INET;
+ route->in_addr.in = gateway;
+
+ route_drop(route, link, &route_drop_handler);
+ }
+
address->family = AF_INET;
address->in_addr.in = addr;
address->prefixlen = prefixlen;
static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
Link *link = userdata;
- int r;
+ int r = 0;
assert(link);
assert(link->network);
}
if (event == DHCP_EVENT_EXPIRED && link->network->ipv4ll) {
- r = sd_ipv4ll_start (link->ipv4ll);
+ if (!sd_ipv4ll_is_running(link->ipv4ll))
+ r = sd_ipv4ll_start(link->ipv4ll);
+ else if (ipv4ll_is_bound(link->ipv4ll))
+ r = ipv4ll_address_update(link, false);
if (r < 0) {
link_enter_failed(link);
return;
return;
}
if (link->ipv4ll) {
- r = sd_ipv4ll_stop(link->ipv4ll);
+ if (ipv4ll_is_bound(link->ipv4ll))
+ r = ipv4ll_address_update(link, true);
+ else
+ r = sd_ipv4ll_stop(link->ipv4ll);
if (r < 0) {
link_enter_failed(link);
return;
return;
}
-static int ipv4ll_address_lost(sd_ipv4ll *ll, Link *link) {
+static int ipv4ll_address_update(Link *link, bool deprecate) {
+ int r;
+ struct in_addr addr;
+
+ assert(link);
+
+ r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+ if (r >= 0) {
+ _cleanup_address_free_ Address *address = NULL;
+
+ log_debug_link(link, "IPv4 link-local %s %u.%u.%u.%u",
+ deprecate ? "deprecate" : "approve",
+ ADDRESS_FMT_VAL(addr));
+
+ r = address_new_dynamic(&address);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate address: %s", strerror(-r));
+ return r;
+ }
+
+ address->family = AF_INET;
+ address->in_addr.in = addr;
+ address->prefixlen = 16;
+ address->scope = RT_SCOPE_LINK;
+ address->cinfo.ifa_prefered = deprecate ? 0 : CACHE_INFO_INFINITY_LIFE_TIME;
+ address->broadcast.s_addr = address->in_addr.in.s_addr | htonl(0xfffffffflu >> address->prefixlen);
+
+ address_update(address, link, &address_update_handler);
+ }
+
+ return 0;
+
+}
+
+static int ipv4ll_address_lost(Link *link) {
int r;
struct in_addr addr;
- assert(ll);
assert(link);
r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
return 0;
}
+static bool ipv4ll_is_bound(sd_ipv4ll *ll) {
+ int r;
+ struct in_addr addr;
+
+ assert(ll);
+
+ r = sd_ipv4ll_get_address(ll, &addr);
+ if (r < 0)
+ return false;
+ return true;
+}
+
static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
struct in_addr address;
int r;
switch(event) {
case IPV4LL_EVENT_STOP:
case IPV4LL_EVENT_CONFLICT:
- r = ipv4ll_address_lost(ll, link);
+ r = ipv4ll_address_lost(link);
if (r < 0) {
link_enter_failed(link);
return;
assert(link->manager->event);
if (link->network->ipv4ll) {
- if (!link->ipv4ll) {
- r = sd_ipv4ll_new(&link->ipv4ll);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link);
- if (r < 0)
- return r;
- }
+ assert(link->ipv4ll);
log_debug_link(link, "acquiring IPv4 link-local address");
}
if (link->network->dhcp) {
- if (!link->dhcp_client) {
- r = sd_dhcp_client_new(&link->dhcp_client);
- if (r < 0)
- return r;
-
- r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
- if (r < 0)
- return r;
-
- r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
- if (r < 0)
- return r;
-
- r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
- if (r < 0)
- return r;
-
- r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link);
- if (r < 0)
- return r;
-
- if (link->network->dhcp_mtu) {
- r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
- if (r < 0)
- return r;
- }
- }
+ assert(link->dhcp_client);
log_debug_link(link, "acquiring DHCPv4 lease");
if (link->flags == flags)
return 0;
+ log_debug_link(link, "link status updated: %#.8x -> %#.8x",
+ link->flags, flags);
+
if ((link->flags & IFF_UP) != (flags & IFF_UP))
log_info_link(link,
"link is %s", flags & IFF_UP ? "up": "down");
}
}
- log_debug_link(link, "link status updated: %#.8x -> %#.8x",
- link->flags, flags);
-
link->flags = flags;
return 0;
if (r < 0)
return r;
+ if (link->network->ipv4ll) {
+ uint8_t seed[8];
+ r = sd_ipv4ll_new(&link->ipv4ll);
+ if (r < 0)
+ return r;
+
+ r = net_get_unique_predictable_data(link->udev_device, seed);
+ if (r >= 0) {
+ r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex);
+ if (r < 0)
+ return r;
+
+ r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link);
+ if (r < 0)
+ return r;
+ }
+
+ if (link->network->dhcp) {
+ r = sd_dhcp_client_new(&link->dhcp_client);
+ if (r < 0)
+ return r;
+
+ r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
+ if (r < 0)
+ return r;
+
+ r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp_handler, link);
+ if (r < 0)
+ return r;
+
+ if (link->network->dhcp_mtu) {
+ r = sd_dhcp_client_set_request_option(link->dhcp_client, 26);
+ if (r < 0)
+ return r;
+ }
+ }
+
r = link_configure(link);
if (r < 0)
return r;
int link_update(Link *link, sd_rtnl_message *m) {
unsigned flags;
+ struct ether_addr mac;
int r;
assert(link);
PRIu16, link->original_mtu);
}
- r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &link->mac);
- if (r >= 0) {
- log_debug_link(link, "MAC address: "
- "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
- link->mac.ether_addr_octet[0],
- link->mac.ether_addr_octet[1],
- link->mac.ether_addr_octet[2],
- link->mac.ether_addr_octet[3],
- link->mac.ether_addr_octet[4],
- link->mac.ether_addr_octet[5]);
+ r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
+ if (r < 0)
+ log_debug_link(link, "Could not get MAC address: %s", strerror(-r));
+ else {
+ if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN)) {
+
+ memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
+
+ log_debug_link(link, "MAC address: "
+ "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
+ mac.ether_addr_octet[0],
+ mac.ether_addr_octet[1],
+ mac.ether_addr_octet[2],
+ mac.ether_addr_octet[3],
+ mac.ether_addr_octet[4],
+ mac.ether_addr_octet[5]);
+
+ if (link->ipv4ll) {
+ r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
+ if (r < 0) {
+ log_warning_link(link, "Could not update MAC "
+ "address in IPv4LL client: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+
+ if (link->dhcp_client) {
+ r = sd_dhcp_client_set_mac(link->dhcp_client, &link->mac);
+ if (r < 0) {
+ log_warning_link(link, "Could not update MAC "
+ "address in DHCP client: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+ }
}
r = sd_rtnl_message_link_get_flags(m, &flags);
assert(link);
assert(link->state_file);
- r = mkdir_safe_label("/run/systemd/network/links", 0755, 0, 0);
- if (r < 0)
- goto finish;
-
r = fopen_temporary(link->state_file, &f, &temp_path);
if (r < 0)
goto finish;
link_state_to_string(link->state));
if (link->dhcp_lease) {
- const char *lease_file = "/run/systemd/network/leases/test.lease";
+ _cleanup_free_ char *lease_file = NULL;
+
+ r = asprintf(&lease_file, "/run/systemd/network/leases/%"PRIu64,
+ link->ifindex);
+ if (r < 0)
+ return -ENOMEM;
r = dhcp_lease_save(link->dhcp_lease, lease_file);
if (r < 0)
~ianmdlvl / elogind.git / blobdiff