sd-network: add new library

This is similar to sd-login, but exposes the state of networkd rather than logind.

Include it in libsystemd-dhcp and rename it to libsystemd-network.

19 files changed, 638 insertions, 36 deletions

diff --git a/Makefile.am b/Makefile.am
index 25b48e50d..b7c38b687 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -196,6 +196,7 @@ AM_CPPFLAGS = \
 	-I $(top_srcdir)/src/libsystemd/sd-bus \
 	-I $(top_srcdir)/src/libsystemd/sd-event \
 	-I $(top_srcdir)/src/libsystemd/sd-rtnl \
+	-I $(top_srcdir)/src/libsystemd-network \
 	$(OUR_CPPFLAGS)
 
 AM_CFLAGS = $(OUR_CFLAGS)
@@ -2398,41 +2399,44 @@ busctl_CFLAGS = \
 
 # ------------------------------------------------------------------------------
 noinst_LTLIBRARIES += \
-	libsystemd-dhcp.la
+	libsystemd-network.la
 
-libsystemd_dhcp_la_SOURCES = \
+libsystemd_network_la_SOURCES = \
+	src/systemd/sd-network.h \
 	src/systemd/sd-dhcp-client.h \
-	src/libsystemd-dhcp/sd-dhcp-client.c \
-	src/libsystemd-dhcp/dhcp-lease.h \
-	src/libsystemd-dhcp/dhcp-lease.c \
-	src/libsystemd-dhcp/dhcp-network.c \
-	src/libsystemd-dhcp/dhcp-option.c \
-	src/libsystemd-dhcp/dhcp-packet.c \
-	src/libsystemd-dhcp/dhcp-internal.h \
-	src/libsystemd-dhcp/dhcp-protocol.h
-
-libsystemd_dhcp_la_LIBADD = \
+	src/systemd/sd-dhcp-lease.h \
+	src/network/sd-network.c \
+	src/libsystemd-network/sd-dhcp-client.c \
+	src/libsystemd-network/dhcp-network.c \
+	src/libsystemd-network/dhcp-option.c \
+	src/libsystemd-network/dhcp-packet.c \
+	src/libsystemd-network/dhcp-internal.h \
+	src/libsystemd-network/dhcp-protocol.h \
+	src/libsystemd-network/dhcp-lease-internal.h \
+	src/libsystemd-network/sd-dhcp-lease.c
+
+libsystemd_network_la_LIBADD = \
 	libsystemd-internal.la \
 	libsystemd-shared.la
 
 test_dhcp_option_SOURCES = \
-	src/libsystemd-dhcp/dhcp-protocol.h \
-	src/libsystemd-dhcp/dhcp-internal.h \
-	src/libsystemd-dhcp/test-dhcp-option.c
+	src/libsystemd-network/dhcp-protocol.h \
+	src/libsystemd-network/dhcp-internal.h \
+	src/libsystemd-network/test-dhcp-option.c
 
 test_dhcp_option_LDADD = \
-	libsystemd-dhcp.la \
+	libsystemd-network.la \
 	libsystemd-internal.la \
 	libsystemd-shared.la
 
 test_dhcp_client_SOURCES = \
 	src/systemd/sd-dhcp-client.h \
-	src/libsystemd-dhcp/dhcp-protocol.h \
-	src/libsystemd-dhcp/dhcp-internal.h \
-	src/libsystemd-dhcp/test-dhcp-client.c
+	src/libsystemd-network/dhcp-protocol.h \
+	src/libsystemd-network/dhcp-internal.h \
+	src/libsystemd-network/test-dhcp-client.c
 
 test_dhcp_client_LDADD = \
-	libsystemd-dhcp.la \
+	libsystemd-network.la \
 	libsystemd-internal.la \
 	libsystemd-shared.la
 
@@ -4033,7 +4037,7 @@ nodist_libsystemd_networkd_core_la_SOURCES = \
 libsystemd_networkd_core_la_LIBADD = \
 	libudev-internal.la \
 	libsystemd-internal.la \
-	libsystemd-dhcp.la \
+	libsystemd-network.la \
 	libsystemd-label.la \
 	libsystemd-shared.la
 
diff --git a/src/libsystemd-dhcp/Makefile b/src/libsystemd-network/Makefile
index d0b0e8e00..d0b0e8e00 120000
--- a/src/libsystemd-dhcp/Makefile
+++ b/src/libsystemd-network/Makefile
diff --git a/src/libsystemd-dhcp/dhcp-internal.h b/src/libsystemd-network/dhcp-internal.h
index ce83b8163..ce83b8163 100644
--- a/src/libsystemd-dhcp/dhcp-internal.h
+++ b/src/libsystemd-network/dhcp-internal.h
diff --git a/src/libsystemd-dhcp/dhcp-lease.h b/src/libsystemd-network/dhcp-lease-internal.h
index 87323dcb3..d12bcac24 100644
--- a/src/libsystemd-dhcp/dhcp-lease.h
+++ b/src/libsystemd-network/dhcp-lease-internal.h
@@ -25,7 +25,6 @@
 #include <stdint.h>
 #include <linux/if_packet.h>
 
-#include "socket-util.h"
 #include "refcnt.h"
 
 #include "dhcp-protocol.h"
@@ -53,5 +52,8 @@ int dhcp_lease_new(sd_dhcp_lease **ret);
 int dhcp_lease_parse_options(uint8_t code, uint8_t len, const uint8_t *option,
                               void *user_data);
 
+int dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file);
+int dhcp_lease_load(const char *lease_file, sd_dhcp_lease **ret);
+
 DEFINE_TRIVIAL_CLEANUP_FUNC(sd_dhcp_lease*, sd_dhcp_lease_unref);
 #define _cleanup_dhcp_lease_unref_ _cleanup_(sd_dhcp_lease_unrefp)
diff --git a/src/libsystemd-dhcp/dhcp-network.c b/src/libsystemd-network/dhcp-network.c
index 934e8bf13..934e8bf13 100644
--- a/src/libsystemd-dhcp/dhcp-network.c
+++ b/src/libsystemd-network/dhcp-network.c
diff --git a/src/libsystemd-dhcp/dhcp-option.c b/src/libsystemd-network/dhcp-option.c
index 4d45b3b3a..4d45b3b3a 100644
--- a/src/libsystemd-dhcp/dhcp-option.c
+++ b/src/libsystemd-network/dhcp-option.c
diff --git a/src/libsystemd-dhcp/dhcp-packet.c b/src/libsystemd-network/dhcp-packet.c
index 8388e5622..95c4277f8 100644
--- a/src/libsystemd-dhcp/dhcp-packet.c
+++ b/src/libsystemd-network/dhcp-packet.c
@@ -30,8 +30,9 @@
 #include "list.h"
 
 #include "dhcp-protocol.h"
-#include "dhcp-lease.h"
+#include "dhcp-lease-internal.h"
 #include "dhcp-internal.h"
+#include "sd-dhcp-lease.h"
 #include "sd-dhcp-client.h"
 
 #define DHCP_CLIENT_MIN_OPTIONS_SIZE            312
diff --git a/src/libsystemd-dhcp/dhcp-protocol.h b/src/libsystemd-network/dhcp-protocol.h
index 81d36cef2..81d36cef2 100644
--- a/src/libsystemd-dhcp/dhcp-protocol.h
+++ b/src/libsystemd-network/dhcp-protocol.h
diff --git a/src/libsystemd-dhcp/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 0c82260df..1f676ccb6 100644
--- a/src/libsystemd-dhcp/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -29,8 +29,8 @@
 #include "list.h"
 
 #include "dhcp-protocol.h"
-#include "dhcp-lease.h"
 #include "dhcp-internal.h"
+#include "dhcp-lease-internal.h"
 #include "sd-dhcp-client.h"
 
 struct sd_dhcp_client {
diff --git a/src/libsystemd-dhcp/dhcp-lease.c b/src/libsystemd-network/sd-dhcp-lease.c
index c1f76aa56..0529b6d8f 100644
--- a/src/libsystemd-dhcp/dhcp-lease.c
+++ b/src/libsystemd-network/sd-dhcp-lease.c
@@ -23,14 +23,18 @@
 #include <string.h>
 #include <stdio.h>
 #include <net/ethernet.h>
+#include <arpa/inet.h>
 #include <sys/param.h>
 
 #include "util.h"
 #include "list.h"
+#include "mkdir.h"
+#include "fileio.h"
 
 #include "dhcp-protocol.h"
 #include "dhcp-internal.h"
-#include "dhcp-lease.h"
+#include "dhcp-lease-internal.h"
+#include "sd-dhcp-lease.h"
 #include "sd-dhcp-client.h"
 
 int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr) {
@@ -242,3 +246,156 @@ int dhcp_lease_new(sd_dhcp_lease **ret) {
 
         return 0;
 }
+
+int dhcp_lease_save(sd_dhcp_lease *lease, const char *lease_file) {
+        _cleanup_free_ char *temp_path = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
+        char buf[INET_ADDRSTRLEN];
+        struct in_addr address;
+        const char *string;
+        uint16_t mtu;
+        int r;
+
+        assert(lease);
+        assert(lease_file);
+
+        r = mkdir_safe_label("/run/systemd/network/leases", 0755, 0, 0);
+        if (r < 0)
+                goto finish;
+
+        r = fopen_temporary(lease_file, &f, &temp_path);
+        if (r < 0)
+                goto finish;
+
+        fchmod(fileno(f), 0644);
+
+        r = sd_dhcp_lease_get_address(lease, &address);
+        if (r < 0)
+                goto finish;
+
+        string = inet_ntop(AF_INET, &address, buf, INET_ADDRSTRLEN);
+        if (!string) {
+                r = -errno;
+                goto finish;
+        }
+
+        fprintf(f,
+                "# This is private data. Do not parse.\n"
+                "ADDRESS=%s\n", string);
+
+        r = sd_dhcp_lease_get_router(lease, &address);
+        if (r < 0)
+                goto finish;
+
+        string = inet_ntop(AF_INET, &address, buf, INET_ADDRSTRLEN);
+        if (!string) {
+                r = -errno;
+                goto finish;
+        }
+
+        fprintf(f,
+                "ROUTER=%s\n", string);
+
+        r = sd_dhcp_lease_get_netmask(lease, &address);
+        if (r < 0)
+                goto finish;
+
+        string = inet_ntop(AF_INET, &address, buf, INET_ADDRSTRLEN);
+        if (!string) {
+                r = -errno;
+                goto finish;
+        }
+
+        fprintf(f,
+                "NETMASK=%s\n", string);
+
+        r = sd_dhcp_lease_get_mtu(lease, &mtu);
+        if (r >= 0)
+                fprintf(f, "MTU=%" PRIu16 "\n", mtu);
+
+/* TODO: DNS. See resolv.conf writing in network-manager.c */
+
+        r = sd_dhcp_lease_get_domainname(lease, &string);
+        if (r >= 0)
+                fprintf(f, "DOMAINNAME=%s\n", string);
+
+        r = sd_dhcp_lease_get_hostname(lease, &string);
+        if (r >= 0)
+                fprintf(f, "HOSTNAME=%s\n", string);
+
+        r = 0;
+
+        fflush(f);
+
+        if (ferror(f) || rename(temp_path, lease_file) < 0) {
+                r = -errno;
+                unlink(lease_file);
+                unlink(temp_path);
+        }
+
+finish:
+        if (r < 0)
+                log_error("Failed to save lease data %s: %s", lease_file, strerror(-r));
+
+        return r;
+}
+
+int dhcp_lease_load(const char *lease_file, sd_dhcp_lease **ret) {
+        _cleanup_dhcp_lease_unref_ sd_dhcp_lease *lease = NULL;
+        _cleanup_free_ char *address = NULL, *router = NULL, *netmask = NULL,
+                            *mtu = NULL;
+        struct in_addr addr;
+        int r;
+
+        assert(lease_file);
+        assert(ret);
+
+        r = dhcp_lease_new(&lease);
+        if (r < 0)
+                return r;
+
+        r = parse_env_file(lease_file, NEWLINE,
+                           "ADDRESS", &address,
+                           "ROUTER", &router,
+                           "NETMASK", &netmask,
+                           "MTU", &mtu,
+                           "DOMAINNAME", &lease->domainname,
+                           "HOSTNAME", &lease->hostname,
+                           NULL);
+        if (r < 0) {
+                if (r == -ENOENT)
+                        return 0;
+
+                log_error("Failed to read %s: %s", lease_file, strerror(-r));
+                return r;
+        }
+
+        r = inet_pton(AF_INET, address, &addr);
+        if (r < 0)
+                return r;
+
+        lease->address = addr.s_addr;
+
+        r = inet_pton(AF_INET, router, &addr);
+        if (r < 0)
+                return r;
+
+        lease->router = addr.s_addr;
+
+        r = inet_pton(AF_INET, netmask, &addr);
+        if (r < 0)
+                return r;
+
+        lease->subnet_mask = addr.s_addr;
+
+        if (mtu) {
+                uint16_t u;
+                if (sscanf(mtu, "%" SCNu16, &u) > 0)
+                        lease->mtu = u;
+        }
+
+        *ret = lease;
+        lease = NULL;
+
+        return 0;
+}
diff --git a/src/libsystemd-dhcp/test-dhcp-client.c b/src/libsystemd-network/test-dhcp-client.c
index 8061e5fa8..8061e5fa8 100644
--- a/src/libsystemd-dhcp/test-dhcp-client.c
+++ b/src/libsystemd-network/test-dhcp-client.c
diff --git a/src/libsystemd-dhcp/test-dhcp-option.c b/src/libsystemd-network/test-dhcp-option.c
index 8659fd502..8659fd502 100644
--- a/src/libsystemd-dhcp/test-dhcp-option.c
+++ b/src/libsystemd-network/test-dhcp-option.c
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index b217123ec..f09fb7546 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -28,6 +28,8 @@
 #include "bus-util.h"
 #include "net-util.h"
 
+#include "dhcp-lease-internal.h"
+
 int link_new(Manager *manager, struct udev_device *device, Link **ret) {
         _cleanup_link_free_ Link *link = NULL;
         const char *mac;
@@ -51,6 +53,11 @@ int link_new(Manager *manager, struct udev_device *device, Link **ret) {
         if (link->ifindex <= 0)
                 return -EINVAL;
 
+        r = asprintf(&link->state_file, "/run/systemd/network/links/%u",
+                     (unsigned) link->ifindex);
+        if (r < 0)
+                return r;
+
         mac = udev_device_get_sysattr_value(device, "address");
         if (mac) {
                 mac_addr = ether_aton(mac);
@@ -83,6 +90,7 @@ void link_free(Link *link) {
         hashmap_remove(link->manager->links, &link->ifindex);
 
         free(link->ifname);
+        free(link->state_file);
 
         free(link);
 }
@@ -139,6 +147,8 @@ static int link_enter_configured(Link *link) {
 
         link->state = LINK_STATE_CONFIGURED;
 
+        link_save(link);
+
         return 0;
 }
 
@@ -148,6 +158,8 @@ static void link_enter_failed(Link *link) {
         log_warning_link(link, "failed");
 
         link->state = LINK_STATE_FAILED;
+
+        link_save(link);
 }
 
 static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
@@ -900,6 +912,8 @@ static int link_enter_enslave(Link *link) {
 
         link->state = LINK_STATE_ENSLAVING;
 
+        link_save(link);
+
         if (!link->network->bridge && !link->network->bond &&
             hashmap_isempty(link->network->vlans) &&
             hashmap_isempty(link->network->macvlans))
@@ -1066,3 +1080,61 @@ int link_update(Link *link, sd_rtnl_message *m) {
 
         return link_update_flags(link, flags);
 }
+
+int link_save(Link *link) {
+        _cleanup_free_ char *temp_path = NULL;
+        _cleanup_fclose_ FILE *f = NULL;
+        int r;
+
+        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;
+
+        fchmod(fileno(f), 0644);
+
+        fprintf(f,
+                "# This is private data. Do not parse.\n"
+                "STATE=%s\n",
+                link_state_to_string(link->state));
+
+        if (link->dhcp_lease) {
+                const char *lease_file = "/run/systemd/network/leases/test.lease";
+
+                r = dhcp_lease_save(link->dhcp_lease, lease_file);
+                if (r < 0)
+                        goto finish;
+
+                fprintf(f, "DHCP_LEASE=%s\n", lease_file);
+        }
+
+        fflush(f);
+
+        if (ferror(f) || rename(temp_path, link->state_file) < 0) {
+                r = -errno;
+                unlink(link->state_file);
+                unlink(temp_path);
+        }
+
+finish:
+        if (r < 0)
+                log_error("Failed to save link data %s: %s", link->state_file, strerror(-r));
+
+        return r;
+}
+
+static const char* const link_state_table[_LINK_STATE_MAX] = {
+        [LINK_STATE_ENSLAVING] = "configuring",
+        [LINK_STATE_SETTING_ADDRESSES] = "configuring",
+        [LINK_STATE_SETTING_ROUTES] = "configuring",
+        [LINK_STATE_CONFIGURED] = "configured",
+        [LINK_STATE_FAILED] = "failed",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
diff --git a/src/network/networkd.c b/src/network/networkd.c
index 00e9a5f3d..a80740bbe 100644
--- a/src/network/networkd.c
+++ b/src/network/networkd.c
@@ -40,6 +40,11 @@ int main(int argc, char *argv[]) {
                 goto out;
         }
 
+        /* Always create the directories people can create inotify
+         * watches in. */
+        mkdir_label("/run/systemd/network/links", 0755);
+        mkdir_label("/run/systemd/network/leases", 0755);
+
         r = manager_new(&m);
         if (r < 0) {
                 log_error("Could not create manager: %s", strerror(-r));
diff --git a/src/network/networkd.h b/src/network/networkd.h
index 85c300982..e9c0dd512 100644
--- a/src/network/networkd.h
+++ b/src/network/networkd.h
@@ -189,6 +189,7 @@ struct Link {
 
         uint64_t ifindex;
         char *ifname;
+        char *state_file;
         struct ether_addr mac;
 
         unsigned flags;
@@ -354,6 +355,11 @@ int link_configure(Link *link);
 
 int link_update(Link *link, sd_rtnl_message *message);
 
+int link_save(Link *link);
+
+const char* link_state_to_string(LinkState s) _const_;
+LinkState link_state_from_string(const char *s) _pure_;
+
 DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
 #define _cleanup_link_free_ _cleanup_(link_freep)
 
diff --git a/src/network/sd-network.c b/src/network/sd-network.c
new file mode 100644
index 000000000..746987366
--- /dev/null
+++ b/src/network/sd-network.c
@@ -0,0 +1,237 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2011 Lennart Poettering
+  Copyright 2014 Tom Gundersen
+
+  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 <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/inotify.h>
+#include <sys/poll.h>
+
+#include "util.h"
+#include "macro.h"
+#include "strv.h"
+#include "fileio.h"
+#include "sd-network.h"
+#include "dhcp-lease-internal.h"
+
+_public_ int sd_network_get_link_state(unsigned index, char **state) {
+        char *p, *s = NULL;
+        int r;
+
+        assert_return(index, -EINVAL);
+        assert_return(state, -EINVAL);
+
+        if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
+                return -ENOMEM;
+
+        r = parse_env_file(p, NEWLINE, "STATE", &s, NULL);
+        free(p);
+
+        if (r == -ENOENT) {
+                free(s);
+                s = strdup("unknown");
+                if (!s)
+                        return -ENOMEM;
+
+                *state = s;
+                return 0;
+        } else if (r < 0) {
+                free(s);
+                return r;
+        } else if (!s)
+                return -EIO;
+
+        *state = s;
+        return 0;
+}
+
+_public_ int sd_network_get_dhcp_lease(unsigned index, sd_dhcp_lease **ret) {
+        sd_dhcp_lease *lease;
+        char *p, *s = NULL;
+        int r;
+
+        assert_return(index, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
+                return -ENOMEM;
+
+        r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL);
+        free(p);
+
+        if (r < 0) {
+                free(s);
+                return r;
+        } else if (!s)
+                return -EIO;
+
+        r = dhcp_lease_load(s, &lease);
+        if (r < 0)
+                return r;
+
+        *ret = lease;
+
+        return 0;
+}
+
+_public_ int sd_network_get_ifindices(unsigned **indices) {
+        _cleanup_closedir_ DIR *d;
+        int r = 0;
+        unsigned n = 0;
+        _cleanup_free_ uid_t *l = NULL;
+
+        d = opendir("/run/systemd/network/links/");
+        if (!d)
+                return -errno;
+
+        for (;;) {
+                struct dirent *de;
+                int k;
+                unsigned index;
+
+                errno = 0;
+                de = readdir(d);
+                if (!de && errno != 0)
+                        return -errno;
+
+                if (!de)
+                        break;
+
+                dirent_ensure_type(d, de);
+
+                if (!dirent_is_file(de))
+                        continue;
+
+                k = safe_atou(de->d_name, &index);
+                if (k < 0)
+                        continue;
+
+                if (indices) {
+                        if ((unsigned) r >= n) {
+                                unsigned *t;
+
+                                n = MAX(16, 2*r);
+                                t = realloc(l, sizeof(unsigned) * n);
+                                if (!t)
+                                        return -ENOMEM;
+
+                                l = t;
+                        }
+
+                        assert((unsigned) r < n);
+                        l[r++] = index;
+                } else
+                        r++;
+        }
+
+        if (indices) {
+                *indices = l;
+                l = NULL;
+        }
+
+        return r;
+}
+
+static inline int MONITOR_TO_FD(sd_network_monitor *m) {
+        return (int) (unsigned long) m - 1;
+}
+
+static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
+        return (sd_network_monitor*) (unsigned long) (fd + 1);
+}
+
+_public_ int sd_network_monitor_new(const char *category, sd_network_monitor **m) {
+        int fd, k;
+        bool good = false;
+
+        assert_return(m, -EINVAL);
+
+        fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
+        if (fd < 0)
+                return -errno;
+
+        if (!category || streq(category, "netif")) {
+                k = inotify_add_watch(fd, "/run/systemd/network/links/", IN_MOVED_TO|IN_DELETE);
+                if (k < 0) {
+                        close_nointr_nofail(fd);
+                        return -errno;
+                }
+
+                good = true;
+        }
+
+        if (!good) {
+                close_nointr(fd);
+                return -EINVAL;
+        }
+
+        *m = FD_TO_MONITOR(fd);
+        return 0;
+}
+
+_public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
+        int fd;
+
+        assert_return(m, NULL);
+
+        fd = MONITOR_TO_FD(m);
+        close_nointr(fd);
+
+        return NULL;
+}
+
+_public_ int sd_network_monitor_flush(sd_network_monitor *m) {
+
+        assert_return(m, -EINVAL);
+
+        return flush_fd(MONITOR_TO_FD(m));
+}
+
+_public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
+
+        assert_return(m, -EINVAL);
+
+        return MONITOR_TO_FD(m);
+}
+
+_public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
+
+        assert_return(m, -EINVAL);
+
+        /* For now we will only return POLLIN here, since we don't
+         * need anything else ever for inotify.  However, let's have
+         * this API to keep our options open should we later on need
+         * it. */
+        return POLLIN;
+}
+
+_public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
+
+        assert_return(m, -EINVAL);
+        assert_return(timeout_usec, -EINVAL);
+
+        /* For now we will only return (uint64_t) -1, since we don't
+         * need any timeout. However, let's have this API to keep our
+         * options open should we later on need it. */
+        *timeout_usec = (uint64_t) -1;
+        return 0;
+}
diff --git a/src/systemd/sd-dhcp-client.h b/src/systemd/sd-dhcp-client.h
index 87f5adb59..a60bb5832 100644
--- a/src/systemd/sd-dhcp-client.h
+++ b/src/systemd/sd-dhcp-client.h
@@ -26,6 +26,7 @@
 #include <net/ethernet.h>
 
 #include "sd-event.h"
+#include "sd-dhcp-lease.h"
 
 enum {
         DHCP_EVENT_STOP                         = 0,
@@ -36,7 +37,6 @@ enum {
 };
 
 typedef struct sd_dhcp_client sd_dhcp_client;
-typedef struct sd_dhcp_lease sd_dhcp_lease;
 
 typedef void (*sd_dhcp_client_cb_t)(sd_dhcp_client *client, int event,
                                     void *userdata);
@@ -52,16 +52,6 @@ int sd_dhcp_client_set_mac(sd_dhcp_client *client,
                            const struct ether_addr *addr);
 int sd_dhcp_client_get_lease(sd_dhcp_client *client, sd_dhcp_lease **ret);
 
-sd_dhcp_lease *sd_dhcp_lease_ref(sd_dhcp_lease *lease);
-sd_dhcp_lease *sd_dhcp_lease_unref(sd_dhcp_lease *lease);
-int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr);
-int sd_dhcp_lease_get_netmask(sd_dhcp_lease *lease, struct in_addr *addr);
-int sd_dhcp_lease_get_router(sd_dhcp_lease *lease, struct in_addr *addr);
-int sd_dhcp_lease_get_dns(sd_dhcp_lease *lease, struct in_addr **addr, size_t *addr_size);
-int sd_dhcp_lease_get_mtu(sd_dhcp_lease *lease, uint16_t *mtu);
-int sd_dhcp_lease_get_domainname(sd_dhcp_lease *lease, const char **domainname);
-int sd_dhcp_lease_get_hostname(sd_dhcp_lease *lease, const char **hostname);
-
 int sd_dhcp_client_stop(sd_dhcp_client *client);
 int sd_dhcp_client_start(sd_dhcp_client *client);
 void sd_dhcp_client_free(sd_dhcp_client *client);
diff --git a/src/systemd/sd-dhcp-lease.h b/src/systemd/sd-dhcp-lease.h
new file mode 100644
index 000000000..af687a673
--- /dev/null
+++ b/src/systemd/sd-dhcp-lease.h
@@ -0,0 +1,41 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef foosddhcpleasehfoo
+#define foosddhcpleasehfoo
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2013 Intel Corporation. All rights reserved.
+  Copyright (C) 2014 Tom Gundersen
+
+  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/in.h>
+#include <net/ethernet.h>
+
+typedef struct sd_dhcp_lease sd_dhcp_lease;
+
+sd_dhcp_lease *sd_dhcp_lease_ref(sd_dhcp_lease *lease);
+sd_dhcp_lease *sd_dhcp_lease_unref(sd_dhcp_lease *lease);
+int sd_dhcp_lease_get_address(sd_dhcp_lease *lease, struct in_addr *addr);
+int sd_dhcp_lease_get_netmask(sd_dhcp_lease *lease, struct in_addr *addr);
+int sd_dhcp_lease_get_router(sd_dhcp_lease *lease, struct in_addr *addr);
+int sd_dhcp_lease_get_dns(sd_dhcp_lease *lease, struct in_addr **addr, size_t *addr_size);
+int sd_dhcp_lease_get_mtu(sd_dhcp_lease *lease, uint16_t *mtu);
+int sd_dhcp_lease_get_domainname(sd_dhcp_lease *lease, const char **domainname);
+int sd_dhcp_lease_get_hostname(sd_dhcp_lease *lease, const char **hostname);
+
+#endif
diff --git a/src/systemd/sd-network.h b/src/systemd/sd-network.h
new file mode 100644
index 000000000..c0b093d06
--- /dev/null
+++ b/src/systemd/sd-network.h
@@ -0,0 +1,87 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef foosdloginhfoo
+#define foosdloginhfoo
+
+/***
+  This file is part of systemd.
+
+  Copyright 2011 Lennart Poettering
+  Copyright 2014 Tom Gundersen
+
+  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 <sys/types.h>
+#include <inttypes.h>
+
+#include "sd-dhcp-lease.h"
+
+#include "_sd-common.h"
+
+/*
+ * A few points:
+ *
+ * Instead of returning an empty string array or empty integer array, we
+ * may return NULL.
+ *
+ * Free the data the library returns with libc free(). String arrays
+ * are NULL terminated and you need to free the array itself in
+ * addition to the strings contained.
+ *
+ * We return error codes as negative errno, kernel-style. 0 or
+ * positive on success.
+ *
+ * These functions access data in /run. This is a virtual file systems,
+ * hence the accesses is relatively cheap.
+ *
+ * See sd-network(3) for more information.
+ */
+
+_SD_BEGIN_DECLARATIONS;
+
+/* Get state from ifindex. Possible states: unknown, unmanaged, failed, configuring, configured */
+int sd_network_get_link_state(unsigned index, char**state);
+
+/* Get DHCPv4 lease from ifindex. */
+int sd_network_get_dhcp_lease(unsigned index, sd_dhcp_lease **ret);
+
+/* Get all network interfaces indices, store in *indices. Returns the
+ * number of indices. If indices is NULL only returns the number of indices. */
+int sd_network_get_ifindices(unsigned **indices);
+
+/* Monitor object */
+typedef struct sd_network_monitor sd_network_monitor;
+
+/* Create a new monitor. Category must be NULL. */
+int sd_network_monitor_new(const char *category, sd_network_monitor** ret);
+
+/* Destroys the passed monitor. Returns NULL. */
+sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m);
+
+/* Flushes the monitor */
+int sd_network_monitor_flush(sd_network_monitor *m);
+
+/* Get FD from monitor */
+int sd_network_monitor_get_fd(sd_network_monitor *m);
+
+/* Get poll() mask to monitor */
+int sd_network_monitor_get_events(sd_network_monitor *m);
+
+/* Get timeout for poll(), as usec value relative to CLOCK_MONOTONIC's epoch */
+int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec);
+
+_SD_END_DECLARATIONS;
+
+#endif