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networkd: address - add support for broadcast
[elogind.git] / src / network / networkd-link.c
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 444af8f6db18b64bbc36ac3da1c31bb23bc5d817..dec33e88eec71832bd0f8c899d43fb2087efc7d3 100644 (file)
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -95,7 +95,7 @@ int link_add(Manager *m, struct udev_device *device, Link **ret) {
         Network *network;
         int r;
         uint64_t ifindex;
-        const char *devtype;
+        NetdevKind kind;
 
         assert(m);
         assert(device);
@@ -113,9 +113,9 @@ int link_add(Manager *m, struct udev_device *device, Link **ret) {
 
         *ret = link;
 
-        devtype = udev_device_get_devtype(device);
-        if (streq_ptr(devtype, "bridge")) {
-                r = bridge_set_link(m, link);
+        kind = netdev_kind_from_string(udev_device_get_devtype(device));
+        if (kind != _NETDEV_KIND_INVALID) {
+                r = netdev_set_link(m, kind, link);
                 if (r < 0 && r != -ENOENT)
                         return r;
         }
@@ -166,7 +166,11 @@ static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -EEXIST)
-                log_warning_link(link, "could not set route: %s", strerror(-r));
+                log_struct_link(LOG_WARNING, link,
+                                "MESSAGE=%s: could not set route: %s",
+                                link->ifname, strerror(-r),
+                                "ERRNO=%d", -r,
+                                NULL);
 
         /* we might have received an old reply after moving back to SETTING_ADDRESSES,
          * ignore it */
@@ -237,7 +241,7 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0 && r != -EEXIST)
-                log_struct_link(LOG_ERR, link,
+                log_struct_link(LOG_WARNING, link,
                                 "MESSAGE=%s: could not set address: %s",
                                 link->ifname, strerror(-r),
                                 "ERRNO=%d", -r,
@@ -305,8 +309,12 @@ static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdat
                 return 1;
 
         r = sd_rtnl_message_get_errno(m);
-        if (r < 0 && r != -EEXIST)
-                log_warning_link(link, "could not drop address: %s", strerror(-r));
+        if (r < 0 && r != -ENOENT)
+                log_struct_link(LOG_WARNING, link,
+                                "MESSAGE=%s: could not drop address: %s",
+                                link->ifname, strerror(-r),
+                                "ERRNO=%d", -r,
+                                NULL);
 
         return 1;
 }
@@ -325,11 +333,15 @@ static int set_hostname(sd_bus *bus, const char *hostname) {
         _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
         int r = 0;
 
-        assert(bus);
         assert(hostname);
 
         log_debug("Setting transient hostname: '%s'", hostname);
 
+        if (!bus) { /* TODO: replace by assert when we can rely on kdbus */
+                log_info("Not connected to system bus, ignoring transient hostname.");
+                return 0;
+        }
+
         r = sd_bus_message_new_method_call(
                         bus,
                         "org.freedesktop.hostname1",
@@ -363,8 +375,12 @@ static int set_mtu_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
                 return 1;
 
         r = sd_rtnl_message_get_errno(m);
-        if (r < 0 && r != -EEXIST)
-                log_warning_link(link, "Could not set MTU: %s", strerror(-r));
+        if (r < 0)
+                log_struct_link(LOG_WARNING, link,
+                                "MESSAGE=%s: could not set MTU: %s",
+                                link->ifname, strerror(-r),
+                                "ERRNO=%d", -r,
+                                NULL);
 
         return 1;
 }
@@ -427,6 +443,12 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
 
         if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_EXPIRED ||
             event == DHCP_EVENT_STOP) {
+                if (link->network->dhcp_critical) {
+                        log_warning_link(link, "DHCPv4 connection considered system critical, "
+                                         "ignoring request to reconfigure it down.");
+                        return;
+                }
+
                 if (link->dhcp_address) {
                         address_drop(link->dhcp_address, link, address_drop_handler);
 
@@ -491,7 +513,8 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
         if (event == DHCP_EVENT_IP_CHANGE || event == DHCP_EVENT_IP_ACQUIRE) {
                 _cleanup_address_free_ Address *addr = NULL;
                 _cleanup_route_free_ Route *rt = NULL;
-                struct in_addr **nameservers;
+                struct in_addr *nameservers;
+                size_t nameservers_size;
 
                 log_struct_link(LOG_INFO, link,
                                 "MESSAGE=%s: DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
@@ -517,7 +540,7 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
                 addr->family = AF_INET;
                 addr->in_addr.in = address;
                 addr->prefixlen = prefixlen;
-                addr->netmask = netmask;
+                addr->broadcast.s_addr = address.s_addr | ~netmask.s_addr;
 
                 r = route_new_dynamic(&rt);
                 if (r < 0) {
@@ -535,7 +558,7 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
                 rt = NULL;
 
                 if (link->network->dhcp_dns) {
-                        r = sd_dhcp_client_get_dns(client, &nameservers);
+                        r = sd_dhcp_client_get_dns(client, &nameservers, &nameservers_size);
                         if (r >= 0) {
                                 r = manager_update_resolv_conf(link->manager);
                                 if (r < 0)
@@ -583,9 +606,13 @@ static int link_acquire_conf(Link *link) {
         assert(link->manager->event);
 
         if (!link->dhcp) {
-                link->dhcp = sd_dhcp_client_new(link->manager->event);
-                if (!link->dhcp)
-                        return -ENOMEM;
+                r = sd_dhcp_client_new(&link->dhcp);
+                if (r < 0)
+                        return r;
+
+                r = sd_dhcp_client_attach_event(link->dhcp, NULL, 0);
+                if (r < 0)
+                        return r;
 
                 r = sd_dhcp_client_set_index(link->dhcp, link->ifindex);
                 if (r < 0)
@@ -631,7 +658,7 @@ static int link_update_flags(Link *link, unsigned flags) {
 
         if ((link->flags & IFF_UP) != (flags & IFF_UP))
                 log_info_link(link,
-                              "power %s", flags & IFF_UP ? "on": "off");
+                              "link is %s", flags & IFF_UP ? "up": "down");
 
         if ((link->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
                 if (flags & IFF_LOWER_UP) {
@@ -678,9 +705,13 @@ static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0) {
-                log_warning_link(link,
-                                 "could not bring up interface: %s", strerror(-r));
+                log_struct_link(LOG_ERR, link,
+                                "MESSAGE=%s: could not bring up interface: %s",
+                                link->ifname, strerror(-r),
+                                "ERRNO=%d", -r,
+                                NULL);
                 link_enter_failed(link);
+                return 1;
         }
 
         link_update_flags(link, link->flags | IFF_UP);
@@ -704,7 +735,7 @@ static int link_up(Link *link) {
                 return r;
         }
 
-        r = sd_rtnl_message_link_set_flags(req, IFF_UP);
+        r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
         if (r < 0) {
                 log_error_link(link, "Could not set link flags: %s", strerror(-r));
                 return r;
@@ -720,11 +751,11 @@ static int link_up(Link *link) {
         return 0;
 }
 
-static int link_bridge_joined(Link *link) {
+static int link_enslaved(Link *link) {
         int r;
 
         assert(link);
-        assert(link->state == LINK_STATE_JOINING_BRIDGE);
+        assert(link->state == LINK_STATE_ENSLAVING);
         assert(link->network);
 
         r = link_up(link);
@@ -739,67 +770,90 @@ static int link_bridge_joined(Link *link) {
         return 0;
 }
 
-static int bridge_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
+static int enslave_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
         Link *link = userdata;
         int r;
 
         assert(link);
-        assert(link->state == LINK_STATE_JOINING_BRIDGE || link->state == LINK_STATE_FAILED);
+        assert(link->state == LINK_STATE_ENSLAVING || link->state == LINK_STATE_FAILED);
         assert(link->network);
 
+        link->enslaving --;
+
         if (link->state == LINK_STATE_FAILED)
                 return 1;
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0) {
                 log_struct_link(LOG_ERR, link,
-                                "MESSAGE=%s: could not join bridge '%s': %s",
-                                link->ifname, link->network->bridge->name, strerror(-r),
-                                BRIDGE(link->network->bridge),
+                                "MESSAGE=%s: could not enslave: %s",
+                                link->ifname, strerror(-r),
+                                "ERRNO=%d", -r,
                                 NULL);
                 link_enter_failed(link);
                 return 1;
         }
 
-        log_struct_link(LOG_DEBUG, link,
-                        "MESSAGE=%s: joined bridge '%s'",
-                        link->network->bridge->name,
-                        BRIDGE(link->network->bridge),
-                        NULL);
+        log_debug_link(link, "enslaved");
 
-        link_bridge_joined(link);
+        if (link->enslaving == 0)
+                link_enslaved(link);
 
         return 1;
 }
 
-static int link_enter_join_bridge(Link *link) {
+static int link_enter_enslave(Link *link) {
         int r;
 
         assert(link);
         assert(link->network);
         assert(link->state == _LINK_STATE_INVALID);
 
-        link->state = LINK_STATE_JOINING_BRIDGE;
+        link->state = LINK_STATE_ENSLAVING;
 
-        if (!link->network->bridge)
-                return link_bridge_joined(link);
+        if (!link->network->bridge && !link->network->bond && !link->network->vlan)
+                return link_enslaved(link);
 
-        log_struct_link(LOG_DEBUG, link,
-                        "MESSAGE=%s: joining bridge '%s'",
-                        link->network->bridge->name,
-                        BRIDGE(link->network->bridge),
-                        NULL);
-        log_debug_link(link, "joining bridge");
+        if (link->network->bridge) {
+                log_struct_link(LOG_DEBUG, link,
+                                "MESSAGE=%s: enslaving by '%s'",
+                                link->ifname, link->network->bridge->name,
+                                NETDEV(link->network->bridge),
+                                NULL);
 
-        r = bridge_join(link->network->bridge, link, &bridge_handler);
-        if (r < 0) {
-                log_struct_link(LOG_WARNING, link,
-                                "MESSAGE=%s: could not join bridge '%s': %s",
-                                link->network->bridge->name, strerror(-r),
-                                BRIDGE(link->network->bridge),
+                r = netdev_enslave(link->network->bridge, link, &enslave_handler);
+                if (r < 0) {
+                        log_struct_link(LOG_WARNING, link,
+                                        "MESSAGE=%s: could not enslave by '%s': %s",
+                                        link->ifname, link->network->bridge->name, strerror(-r),
+                                        NETDEV(link->network->bridge),
+                                        NULL);
+                        link_enter_failed(link);
+                        return r;
+                }
+
+                link->enslaving ++;
+        }
+
+        if (link->network->vlan) {
+                log_struct_link(LOG_DEBUG, link,
+                                "MESSAGE=%s: enslaving by '%s'",
+                                link->ifname, link->network->vlan->name,
+                                NETDEV(link->network->vlan),
                                 NULL);
-                link_enter_failed(link);
-                return r;
+
+                r = netdev_enslave(link->network->vlan, link, &enslave_handler);
+                if (r < 0) {
+                        log_struct_link(LOG_WARNING, link,
+                                        "MESSAGE=%s: could not enslave by '%s': %s",
+                                        link->ifname, link->network->vlan->name,
+                                        strerror(-r), NETDEV(link->network->vlan),
+                                        NULL);
+                        link_enter_failed(link);
+                        return r;
+                }
+
+                link->enslaving ++;
         }
 
         return 0;
@@ -816,8 +870,13 @@ static int link_get_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0) {
-                log_warning_link(link, "could not get state: %s", strerror(-r));
+                log_struct_link(LOG_ERR, link,
+                                "MESSAGE=%s: could not get state: %s",
+                                link->ifname, strerror(-r),
+                                "ERRNO=%d", -r,
+                                NULL);
                 link_enter_failed(link);
+                return 1;
         }
 
         log_debug_link(link, "got link state");
@@ -866,7 +925,7 @@ int link_configure(Link *link) {
                 return r;
         }
 
-        return link_enter_join_bridge(link);
+        return link_enter_enslave(link);
 }
 
 int link_update(Link *link, sd_rtnl_message *m) {
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