networkd: merge DHCPv4 and DHCPv6 config

[elogind.git] / src / network / networkd-link.c

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 664cc07c724ceb39d6bf63a568d30e5273353504..5d280b5b8247252cf32a5c96cd03788d6f020e0a 100644 (file)
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -29,6 +29,7 @@
 #include "virt.h"
 #include "bus-util.h"
 #include "network-internal.h"
+#include "conf-parser.h"
 
 #include "network-util.h"
 #include "dhcp-lease-internal.h"
@@ -124,8 +125,8 @@ static void link_free(Link *link) {
         free(link->lease_file);
 
         sd_ipv4ll_unref(link->ipv4ll);
-
         sd_dhcp6_client_unref(link->dhcp6_client);
+        sd_icmp6_nd_unref(link->icmp6_router_discovery);
 
         hashmap_remove(link->manager->links, &link->ifindex);
 
@@ -205,7 +206,7 @@ static int link_stop_clients(Link *link) {
         if (!link->network)
                 return 0;
 
-        if (link->network->dhcp) {
+        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
                 assert(link->dhcp_client);
 
                 k = sd_dhcp_client_stop(link->dhcp_client);
@@ -235,12 +236,20 @@ static int link_stop_clients(Link *link) {
                 }
         }
 
-        if (link->network->dhcp6) {
-                assert(link->dhcp6_client);
+        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
+                assert(link->icmp6_router_discovery);
+
+                if (link->dhcp6_client) {
+                        k = sd_dhcp6_client_stop(link->dhcp6_client);
+                        if (k < 0) {
+                                log_warning_link(link, "Could not stop DHCPv6 client: %s", strerror(-r));
+                                r = k;
+                        }
+                }
 
-                k = sd_dhcp6_client_stop(link->dhcp6_client);
+                k = sd_icmp6_nd_stop(link->icmp6_router_discovery);
                 if (k < 0) {
-                        log_warning_link(link, "Could not stop DHCPv6 client: %s", strerror(-r));
+                        log_warning_link(link, "Could not stop ICMPv6 router discovery: %s", strerror(-r));
                         r = k;
                 }
         }
@@ -299,7 +308,8 @@ static int link_enter_configured(Link *link) {
         assert(link->network);
         assert(link->state == LINK_STATE_SETTING_ROUTES);
 
-        if (link->network->dhcp_server) {
+        if (link->network->dhcp_server &&
+            !sd_dhcp_server_is_running(link->dhcp_server)) {
                 struct in_addr pool_start;
                 Address *address;
 
@@ -591,6 +601,7 @@ static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 static int link_enter_set_addresses(Link *link) {
         Address *ad;
         int r;
+        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
 
         assert(link);
         assert(link->network);
@@ -667,6 +678,16 @@ static int link_enter_set_addresses(Link *link) {
                         return r;
                 }
 
+                if (!link->network->dhcp_critical) {
+                        r = sd_dhcp_lease_get_lifetime(link->dhcp_lease,
+                                                       &lifetime);
+                        if (r < 0) {
+                                log_warning_link(link, "DHCP error: no lifetime: %s",
+                                                 strerror(-r));
+                                return r;
+                        }
+                }
+
                 r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
                 if (r < 0) {
                         log_warning_link(link, "DHCP error: no netmask: %s",
@@ -685,6 +706,8 @@ static int link_enter_set_addresses(Link *link) {
 
                 address->family = AF_INET;
                 address->in_addr.in = addr;
+                address->cinfo.ifa_prefered = lifetime;
+                address->cinfo.ifa_valid = lifetime;
                 address->prefixlen = prefixlen;
                 address->broadcast.s_addr = addr.s_addr | ~netmask.s_addr;
 
@@ -958,6 +981,25 @@ static int dhcp_lease_lost(Link *link) {
         return 0;
 }
 
+static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) {
+        sd_dhcp_lease *lease;
+        int r;
+
+        r = sd_dhcp_client_get_lease(client, &lease);
+        if (r < 0) {
+                log_warning_link(link, "DHCP error: no lease %s",
+                                 strerror(-r));
+                return r;
+        }
+
+        sd_dhcp_lease_unref(link->dhcp_lease);
+        link->dhcp_lease = lease;
+
+        link_enter_set_addresses(link);
+
+        return 0;
+}
+
 static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
         sd_dhcp_lease *lease;
         struct in_addr address;
@@ -1108,6 +1150,13 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
                                 }
                         }
 
+                        break;
+                case DHCP_EVENT_RENEW:
+                        r = dhcp_lease_renew(client, link);
+                        if (r < 0) {
+                                link_enter_failed(link);
+                                return;
+                        }
                         break;
                 case DHCP_EVENT_IP_ACQUIRE:
                         r = dhcp_lease_acquired(client, link);
@@ -1408,7 +1457,7 @@ static int link_acquire_conf(Link *link) {
                 }
         }
 
-        if (link->network->dhcp) {
+        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) {
                 assert(link->dhcp_client);
 
                 log_debug_link(link, "acquiring DHCPv4 lease");
@@ -1421,7 +1470,7 @@ static int link_acquire_conf(Link *link) {
                 }
         }
 
-        if (link->network->dhcp6) {
+        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
                 assert(link->icmp6_router_discovery);
 
                 log_debug_link(link, "discovering IPv6 routers");
@@ -1634,7 +1683,7 @@ static int link_enslaved(Link *link) {
                 }
         }
 
-        if (!link->network->dhcp && !link->network->ipv4ll)
+        if ((link->network->dhcp == DHCP_SUPPORT_NONE) && !link->network->ipv4ll)
                 return link_enter_set_addresses(link);
 
         return 0;
@@ -1877,7 +1926,7 @@ static int link_configure(Link *link) {
                         return r;
         }
 
-        if (link->network->dhcp) {
+        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V4)) {
                 r = sd_dhcp_client_new(&link->dhcp_client);
                 if (r < 0)
                         return r;
@@ -1915,7 +1964,7 @@ static int link_configure(Link *link) {
                         return r;
         }
 
-        if (link->network->dhcp6) {
+        if (IN_SET(link->network->dhcp, DHCP_SUPPORT_BOTH, DHCP_SUPPORT_V6)) {
                 r = sd_icmp6_nd_new(&link->icmp6_router_discovery);
                 if (r < 0)
                         return r;
@@ -2448,3 +2497,55 @@ static const char* const link_operstate_table[_LINK_OPERSTATE_MAX] = {
 };
 
 DEFINE_STRING_TABLE_LOOKUP(link_operstate, LinkOperationalState);
+
+static const char* const dhcp_support_table[_DHCP_SUPPORT_MAX] = {
+        [DHCP_SUPPORT_NONE] = "none",
+        [DHCP_SUPPORT_BOTH] = "both",
+        [DHCP_SUPPORT_V4] = "v4",
+        [DHCP_SUPPORT_V6] = "v6",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(dhcp_support, DHCPSupport);
+
+int config_parse_dhcp(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        DHCPSupport *dhcp = data;
+        int k;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        /* Our enum shall be a superset of booleans, hence first try
+         * to parse as boolean, and then as enum */
+
+        k = parse_boolean(rvalue);
+        if (k > 0)
+                *dhcp = DHCP_SUPPORT_BOTH;
+        else if (k == 0)
+                *dhcp = DHCP_SUPPORT_NONE;
+        else {
+                DHCPSupport s;
+
+                s = dhcp_support_from_string(rvalue);
+                if (s < 0){
+                        log_syntax(unit, LOG_ERR, filename, line, -s, "Failed to parse DHCP option, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                *dhcp = s;
+        }
+
+        return 0;
+}