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-rw-r--r--src/network/networkd-ipv4ll.c248
-rw-r--r--src/network/networkd-link.c235
-rw-r--r--src/network/networkd-link.h16
3 files changed, 283 insertions, 216 deletions
diff --git a/src/network/networkd-ipv4ll.c b/src/network/networkd-ipv4ll.c
new file mode 100644
index 0000000000..5467bc372e
--- /dev/null
+++ b/src/network/networkd-ipv4ll.c
@@ -0,0 +1,248 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013-2014 Tom Gundersen <teg@jklm.no>
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+#include <linux/if.h>
+
+#include "networkd-link.h"
+#include "network-internal.h"
+
+static int ipv4ll_address_lost(Link *link) {
+ _cleanup_address_free_ Address *address = NULL;
+ _cleanup_route_free_ Route *route = NULL;
+ struct in_addr addr;
+ int r;
+
+ assert(link);
+
+ link->ipv4ll_route = false;
+ link->ipv4ll_address = false;
+
+ r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
+ if (r < 0)
+ return 0;
+
+ log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u",
+ 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_drop(address, link, &link_address_drop_handler);
+
+ r = route_new_dynamic(&route, RTPROT_UNSPEC);
+ if (r < 0) {
+ log_error_link(link, "Could not allocate route: %s",
+ strerror(-r));
+ return r;
+ }
+
+ route->family = AF_INET;
+ route->scope = RT_SCOPE_LINK;
+ route->metrics = IPV4LL_ROUTE_METRIC;
+
+ route_drop(route, link, &link_route_drop_handler);
+
+ link_client_handler(link);
+
+ return 0;
+}
+
+static int ipv4ll_route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ _cleanup_link_unref_ Link *link = userdata;
+ int r;
+
+ assert(link);
+ assert(!link->ipv4ll_route);
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST) {
+ log_error_link(link, "could not set ipv4ll route: %s", strerror(-r));
+ link_enter_failed(link);
+ }
+
+ link->ipv4ll_route = true;
+
+ if (link->ipv4ll_address == true)
+ link_client_handler(link);
+
+ return 1;
+}
+
+static int ipv4ll_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+ _cleanup_link_unref_ Link *link = userdata;
+ int r;
+
+ assert(link);
+ assert(!link->ipv4ll_address);
+
+ r = sd_rtnl_message_get_errno(m);
+ if (r < 0 && r != -EEXIST) {
+ log_error_link(link, "could not set ipv4ll address: %s", strerror(-r));
+ link_enter_failed(link);
+ } else if (r >= 0) {
+ /* calling handler directly so take a ref */
+ link_ref(link);
+ link_get_address_handler(rtnl, m, link);
+ }
+
+ link->ipv4ll_address = true;
+
+ if (link->ipv4ll_route == true)
+ link_client_handler(link);
+
+ return 1;
+}
+
+static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
+ _cleanup_address_free_ Address *ll_addr = NULL;
+ _cleanup_route_free_ Route *route = NULL;
+ struct in_addr address;
+ int r;
+
+ assert(ll);
+ assert(link);
+
+ r = sd_ipv4ll_get_address(ll, &address);
+ if (r == -ENOENT)
+ return 0;
+ else if (r < 0)
+ return r;
+
+ log_debug_link(link, "IPv4 link-local claim %u.%u.%u.%u",
+ ADDRESS_FMT_VAL(address));
+
+ r = address_new_dynamic(&ll_addr);
+ if (r < 0)
+ return r;
+
+ ll_addr->family = AF_INET;
+ ll_addr->in_addr.in = address;
+ ll_addr->prefixlen = 16;
+ ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen);
+ ll_addr->scope = RT_SCOPE_LINK;
+
+ r = address_configure(ll_addr, link, ipv4ll_address_handler);
+ if (r < 0)
+ return r;
+
+ link->ipv4ll_address = false;
+
+ r = route_new_dynamic(&route, RTPROT_STATIC);
+ if (r < 0)
+ return r;
+
+ route->family = AF_INET;
+ route->scope = RT_SCOPE_LINK;
+ route->metrics = IPV4LL_ROUTE_METRIC;
+
+ r = route_configure(route, link, ipv4ll_route_handler);
+ if (r < 0)
+ return r;
+
+ link->ipv4ll_route = false;
+
+ return 0;
+}
+
+static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){
+ Link *link = userdata;
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->manager);
+
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+ return;
+
+ switch(event) {
+ case IPV4LL_EVENT_STOP:
+ case IPV4LL_EVENT_CONFLICT:
+ r = ipv4ll_address_lost(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return;
+ }
+ break;
+ case IPV4LL_EVENT_BIND:
+ r = ipv4ll_address_claimed(ll, link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return;
+ }
+ break;
+ default:
+ if (event < 0)
+ log_warning_link(link, "IPv4 link-local error: %s", strerror(-event));
+ else
+ log_warning_link(link, "IPv4 link-local unknown event: %d", event);
+ break;
+ }
+}
+
+int ipv4ll_configure(Link *link) {
+ uint8_t seed[8];
+ int r;
+
+ assert(link);
+ assert(link->network);
+ assert(link->network->ipv4ll);
+
+ r = sd_ipv4ll_new(&link->ipv4ll);
+ if (r < 0)
+ return r;
+
+ if (link->udev_device) {
+ 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_mac(link->ipv4ll, &link->mac);
+ 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;
+
+ return 0;
+}
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index f73b06916a..3bef1a57a6 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -245,7 +245,7 @@ static int link_stop_clients(Link *link) {
return r;
}
-static void link_enter_failed(Link *link) {
+void link_enter_failed(Link *link) {
assert(link);
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
@@ -260,6 +260,17 @@ static void link_enter_failed(Link *link) {
link_save(link);
}
+void link_client_handler(Link *link) {
+ assert(link);
+
+ if (link->ipv4ll_address && link->ipv4ll_route)
+ log_debug_link(link, "IPv4LL configured");
+ else
+ log_debug_link(link, "IPv4LL not configured");
+
+ return;
+}
+
static Address* link_find_dhcp_server_address(Link *link) {
Address *address;
@@ -428,20 +439,6 @@ static int link_set_dhcp_routes(Link *link) {
return 0;
}
-static bool ipv4ll_is_bound(sd_ipv4ll *ll) {
- int r;
- struct in_addr addr;
-
- if (!ll)
- return false;
-
- r = sd_ipv4ll_get_address(ll, &addr);
- if (r < 0)
- return false;
-
- return true;
-}
-
static int link_enter_set_routes(Link *link) {
Route *rt;
int r;
@@ -464,31 +461,6 @@ static int link_enter_set_routes(Link *link) {
link->route_messages ++;
}
- if (ipv4ll_is_bound(link->ipv4ll)) {
- _cleanup_route_free_ Route *route = NULL;
-
- r = route_new_dynamic(&route, RTPROT_STATIC);
- if (r < 0) {
- log_error_link(link, "Could not allocate route: %s",
- strerror(-r));
- return r;
- }
-
- route->family = AF_INET;
- route->scope = RT_SCOPE_LINK;
- route->metrics = IPV4LL_ROUTE_METRIC;
-
- r = route_configure(route, link, &route_handler);
- if (r < 0) {
- log_warning_link(link,
- "could not set routes: %s", strerror(-r));
- link_enter_failed(link);
- return r;
- }
-
- link->route_messages ++;
- }
-
if (link->dhcp_lease) {
_cleanup_route_free_ Route *route = NULL;
_cleanup_route_free_ Route *route_gw = NULL;
@@ -561,7 +533,7 @@ static int link_enter_set_routes(Link *link) {
return 0;
}
-static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+int link_route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
@@ -584,7 +556,7 @@ static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata)
return 1;
}
-static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
@@ -670,42 +642,6 @@ static int link_enter_set_addresses(Link *link) {
link->addr_messages ++;
}
- if (link->ipv4ll) {
- _cleanup_address_free_ Address *ll_addr = NULL;
- struct in_addr addr;
-
- r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
- if (r < 0 && r != -ENOENT) {
- log_warning_link(link, "IPV4LL error: no address: %s",
- strerror(-r));
- return r;
- }
-
- if (r != -ENOENT) {
- r = address_new_dynamic(&ll_addr);
- if (r < 0) {
- log_error_link(link, "Could not allocate address: %s", strerror(-r));
- return r;
- }
-
- ll_addr->family = AF_INET;
- ll_addr->in_addr.in = addr;
- ll_addr->prefixlen = 16;
- ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen);
- ll_addr->scope = RT_SCOPE_LINK;
-
- r = address_configure(ll_addr, link, &address_handler);
- if (r < 0) {
- log_warning_link(link,
- "could not set addresses: %s", strerror(-r));
- link_enter_failed(link);
- return r;
- }
-
- link->addr_messages ++;
- }
- }
-
if (link->dhcp_lease) {
_cleanup_address_free_ Address *address = NULL;
struct in_addr addr;
@@ -773,7 +709,7 @@ static int link_enter_set_addresses(Link *link) {
return 0;
}
-static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+int link_address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
@@ -940,7 +876,7 @@ static int dhcp_lease_lost(Link *link) {
route->dst_addr.in = routes[i].dst_addr;
route->dst_prefixlen = routes[i].dst_prefixlen;
- route_drop(route, link, &route_drop_handler);
+ route_drop(route, link, &link_route_drop_handler);
}
}
}
@@ -960,7 +896,7 @@ static int dhcp_lease_lost(Link *link) {
route_gw->dst_prefixlen = 32;
route_gw->scope = RT_SCOPE_LINK;
- route_drop(route_gw, link, &route_drop_handler);
+ route_drop(route_gw, link, &link_route_drop_handler);
}
r = route_new_dynamic(&route, RTPROT_UNSPEC);
@@ -968,7 +904,7 @@ static int dhcp_lease_lost(Link *link) {
route->family = AF_INET;
route->in_addr.in = gateway;
- route_drop(route, link, &route_drop_handler);
+ route_drop(route, link, &link_route_drop_handler);
}
}
@@ -980,7 +916,7 @@ static int dhcp_lease_lost(Link *link) {
address->in_addr.in = addr;
address->prefixlen = prefixlen;
- address_drop(address, link, &address_drop_handler);
+ address_drop(address, link, &link_address_drop_handler);
}
if (link->network->dhcp_mtu) {
@@ -1195,109 +1131,6 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
return;
}
-static int ipv4ll_address_lost(Link *link) {
- 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;
- _cleanup_route_free_ Route *route = NULL;
-
- log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u",
- 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_drop(address, link, &address_drop_handler);
-
- r = route_new_dynamic(&route, RTPROT_UNSPEC);
- if (r < 0) {
- log_error_link(link, "Could not allocate route: %s",
- strerror(-r));
- return r;
- }
-
- route->family = AF_INET;
- route->scope = RT_SCOPE_LINK;
- route->metrics = 99;
-
- route_drop(route, link, &route_drop_handler);
- }
-
- return 0;
-}
-
-static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
- struct in_addr address;
- int r;
-
- assert(ll);
- assert(link);
-
- r = sd_ipv4ll_get_address(ll, &address);
- if (r < 0)
- return r;
-
- log_struct_link(LOG_INFO, link,
- "MESSAGE=%-*s: IPv4 link-local address %u.%u.%u.%u",
- IFNAMSIZ,
- link->ifname,
- ADDRESS_FMT_VAL(address),
- NULL);
-
- link_enter_set_addresses(link);
-
- return 0;
-}
-
-static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){
- Link *link = userdata;
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->manager);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return;
-
- switch(event) {
- case IPV4LL_EVENT_STOP:
- case IPV4LL_EVENT_CONFLICT:
- r = ipv4ll_address_lost(link);
- if (r < 0) {
- link_enter_failed(link);
- return;
- }
- break;
- case IPV4LL_EVENT_BIND:
- r = ipv4ll_address_claimed(ll, link);
- if (r < 0) {
- link_enter_failed(link);
- return;
- }
- break;
- default:
- if (event < 0)
- log_warning_link(link, "IPv4 link-local error: %s", strerror(-event));
- else
- log_warning_link(link, "IPv4 link-local unknown event: %d", event);
- break;
- }
-}
-
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
Link *link = userdata;
@@ -1766,37 +1599,11 @@ static int link_configure(Link *link) {
int r;
assert(link);
+ assert(link->network);
assert(link->state == LINK_STATE_INITIALIZING);
if (link->network->ipv4ll) {
- uint8_t seed[8];
-
- r = sd_ipv4ll_new(&link->ipv4ll);
- if (r < 0)
- return r;
-
- if (link->udev_device) {
- 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_mac(link->ipv4ll, &link->mac);
- 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);
+ r = ipv4ll_configure(link);
if (r < 0)
return r;
}
diff --git a/src/network/networkd-link.h b/src/network/networkd-link.h
index 9f54c8c391..1d0b4665e7 100644
--- a/src/network/networkd-link.h
+++ b/src/network/networkd-link.h
@@ -76,7 +76,10 @@ struct Link {
sd_dhcp_lease *dhcp_lease;
char *lease_file;
uint16_t original_mtu;
+
sd_ipv4ll *ipv4ll;
+ bool ipv4ll_address;
+ bool ipv4ll_route;
LIST_HEAD(Address, pool_addresses);
@@ -92,15 +95,24 @@ int link_get(Manager *m, int ifindex, Link **ret);
int link_add(Manager *manager, sd_rtnl_message *message, Link **ret);
void link_drop(Link *link);
-int link_update(Link *link, sd_rtnl_message *message);
-int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata);
+int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata);
+int link_address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata);
+int link_route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata);
+void link_enter_failed(Link *link);
int link_initialized(Link *link, struct udev_device *device);
+void link_client_handler(Link *link);
+
+int link_update(Link *link, sd_rtnl_message *message);
+int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata);
+
int link_save(Link *link);
bool link_has_carrier(unsigned flags, uint8_t operstate);
+int ipv4ll_configure(Link *link);
+
const char* link_state_to_string(LinkState s) _const_;
LinkState link_state_from_string(const char *s) _pure_;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-22 03:12:33 +0000