1 files changed, 400 insertions, 0 deletions
diff --git a/src/libsystemd/src/sd-network/sd-network.c b/src/libsystemd/src/sd-network/sd-network.c
new file mode 100644
index 0000000000..70083213f9
--- /dev/null
+++ b/src/libsystemd/src/sd-network/sd-network.c
@@ -0,0 +1,400 @@
+/***
+  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 <errno.h>
+#include <poll.h>
+#include <string.h>
+#include <sys/inotify.h>
+
+#include <systemd/sd-network.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "macro.h"
+#include "parse-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "util.h"
+
+_public_ int sd_network_get_operational_state(char **state) {
+        _cleanup_free_ char *s = NULL;
+        int r;
+
+        assert_return(state, -EINVAL);
+
+        r = parse_env_file("/run/systemd/netif/state", NEWLINE, "OPER_STATE", &s, NULL);
+        if (r == -ENOENT)
+                return -ENODATA;
+        if (r < 0)
+                return r;
+        if (isempty(s))
+                return -ENODATA;
+
+        *state = s;
+        s = NULL;
+
+        return 0;
+}
+
+static int network_get_strv(const char *key, char ***ret) {
+        _cleanup_strv_free_ char **a = NULL;
+        _cleanup_free_ char *s = NULL;
+        int r;
+
+        assert_return(ret, -EINVAL);
+
+        r = parse_env_file("/run/systemd/netif/state", NEWLINE, key, &s, NULL);
+        if (r == -ENOENT)
+                return -ENODATA;
+        if (r < 0)
+                return r;
+        if (isempty(s)) {
+                *ret = NULL;
+                return 0;
+        }
+
+        a = strv_split(s, " ");
+        if (!a)
+                return -ENOMEM;
+
+        strv_uniq(a);
+        r = strv_length(a);
+
+        *ret = a;
+        a = NULL;
+
+        return r;
+}
+
+_public_ int sd_network_get_dns(char ***ret) {
+        return network_get_strv("DNS", ret);
+}
+
+_public_ int sd_network_get_ntp(char ***ret) {
+        return network_get_strv("NTP", ret);
+}
+
+_public_ int sd_network_get_search_domains(char ***ret) {
+        return network_get_strv("DOMAINS", ret);
+}
+
+_public_ int sd_network_get_route_domains(char ***ret) {
+        return network_get_strv("ROUTE_DOMAINS", ret);
+}
+
+static int network_link_get_string(int ifindex, const char *field, char **ret) {
+        char path[strlen("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex) + 1];
+        _cleanup_free_ char *s = NULL;
+        int r;
+
+        assert_return(ifindex > 0, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        xsprintf(path, "/run/systemd/netif/links/%i", ifindex);
+
+        r = parse_env_file(path, NEWLINE, field, &s, NULL);
+        if (r == -ENOENT)
+                return -ENODATA;
+        if (r < 0)
+                return r;
+        if (isempty(s))
+                return -ENODATA;
+
+        *ret = s;
+        s = NULL;
+
+        return 0;
+}
+
+static int network_link_get_strv(int ifindex, const char *key, char ***ret) {
+        char path[strlen("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex) + 1];
+        _cleanup_strv_free_ char **a = NULL;
+        _cleanup_free_ char *s = NULL;
+        int r;
+
+        assert_return(ifindex > 0, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        xsprintf(path, "/run/systemd/netif/links/%i", ifindex);
+        r = parse_env_file(path, NEWLINE, key, &s, NULL);
+        if (r == -ENOENT)
+                return -ENODATA;
+        if (r < 0)
+                return r;
+        if (isempty(s)) {
+                *ret = NULL;
+                return 0;
+        }
+
+        a = strv_split(s, " ");
+        if (!a)
+                return -ENOMEM;
+
+        strv_uniq(a);
+        r = strv_length(a);
+
+        *ret = a;
+        a = NULL;
+
+        return r;
+}
+
+_public_ int sd_network_link_get_setup_state(int ifindex, char **state) {
+        return network_link_get_string(ifindex, "ADMIN_STATE", state);
+}
+
+_public_ int sd_network_link_get_network_file(int ifindex, char **filename) {
+        return network_link_get_string(ifindex, "NETWORK_FILE", filename);
+}
+
+_public_ int sd_network_link_get_operational_state(int ifindex, char **state) {
+        return network_link_get_string(ifindex, "OPER_STATE", state);
+}
+
+_public_ int sd_network_link_get_llmnr(int ifindex, char **llmnr) {
+        return network_link_get_string(ifindex, "LLMNR", llmnr);
+}
+
+_public_ int sd_network_link_get_mdns(int ifindex, char **mdns) {
+        return network_link_get_string(ifindex, "MDNS", mdns);
+}
+
+_public_ int sd_network_link_get_dnssec(int ifindex, char **dnssec) {
+        return network_link_get_string(ifindex, "DNSSEC", dnssec);
+}
+
+_public_ int sd_network_link_get_dnssec_negative_trust_anchors(int ifindex, char ***nta) {
+        return network_link_get_strv(ifindex, "DNSSEC_NTA", nta);
+}
+
+_public_ int sd_network_link_get_timezone(int ifindex, char **ret) {
+        return network_link_get_string(ifindex, "TIMEZONE", ret);
+}
+
+_public_ int sd_network_link_get_dns(int ifindex, char ***ret) {
+        return network_link_get_strv(ifindex, "DNS", ret);
+}
+
+_public_ int sd_network_link_get_ntp(int ifindex, char ***ret) {
+        return network_link_get_strv(ifindex, "NTP", ret);
+}
+
+_public_ int sd_network_link_get_search_domains(int ifindex, char ***ret) {
+        return network_link_get_strv(ifindex, "DOMAINS", ret);
+}
+
+_public_ int sd_network_link_get_route_domains(int ifindex, char ***ret) {
+        return network_link_get_strv(ifindex, "ROUTE_DOMAINS", ret);
+}
+
+static int network_link_get_ifindexes(int ifindex, const char *key, int **ret) {
+        char path[strlen("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex) + 1];
+        _cleanup_free_ int *ifis = NULL;
+        _cleanup_free_ char *s = NULL;
+        size_t allocated = 0, c = 0;
+        const char *x;
+        int r;
+
+        assert_return(ifindex > 0, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        xsprintf(path, "/run/systemd/netif/links/%i", ifindex);
+        r = parse_env_file(path, NEWLINE, key, &s, NULL);
+        if (r == -ENOENT)
+                return -ENODATA;
+        if (r < 0)
+                return r;
+        if (isempty(s)) {
+                *ret = NULL;
+                return 0;
+        }
+
+        x = s;
+        for (;;) {
+                _cleanup_free_ char *word = NULL;
+
+                r = extract_first_word(&x, &word, NULL, 0);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        break;
+
+                r = parse_ifindex(word, &ifindex);
+                if (r < 0)
+                        return r;
+
+                if (!GREEDY_REALLOC(ifis, allocated, c + 1))
+                        return -ENOMEM;
+
+                ifis[c++] = ifindex;
+        }
+
+        if (!GREEDY_REALLOC(ifis, allocated, c + 1))
+                return -ENOMEM;
+        ifis[c] = 0; /* Let's add a 0 ifindex to the end, to be nice*/
+
+        *ret = ifis;
+        ifis = NULL;
+
+        return c;
+}
+
+_public_ int sd_network_link_get_carrier_bound_to(int ifindex, int **ret) {
+        return network_link_get_ifindexes(ifindex, "CARRIER_BOUND_TO", ret);
+}
+
+_public_ int sd_network_link_get_carrier_bound_by(int ifindex, int **ret) {
+        return network_link_get_ifindexes(ifindex, "CARRIER_BOUND_BY", ret);
+}
+
+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);
+}
+
+static int monitor_add_inotify_watch(int fd) {
+        int k;
+
+        k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE);
+        if (k >= 0)
+                return 0;
+        else if (errno != ENOENT)
+                return -errno;
+
+        k = inotify_add_watch(fd, "/run/systemd/netif/", IN_CREATE|IN_ISDIR);
+        if (k >= 0)
+                return 0;
+        else if (errno != ENOENT)
+                return -errno;
+
+        k = inotify_add_watch(fd, "/run/systemd/", IN_CREATE|IN_ISDIR);
+        if (k < 0)
+                return -errno;
+
+        return 0;
+}
+
+_public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) {
+        _cleanup_close_ int fd = -1;
+        int k;
+        bool good = false;
+
+        assert_return(m, -EINVAL);
+
+        fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
+        if (fd < 0)
+                return -errno;
+
+        if (!category || streq(category, "links")) {
+                k = monitor_add_inotify_watch(fd);
+                if (k < 0)
+                        return k;
+
+                good = true;
+        }
+
+        if (!good)
+                return -EINVAL;
+
+        *m = FD_TO_MONITOR(fd);
+        fd = -1;
+
+        return 0;
+}
+
+_public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
+        int fd;
+
+        if (m) {
+                fd = MONITOR_TO_FD(m);
+                close_nointr(fd);
+        }
+
+        return NULL;
+}
+
+_public_ int sd_network_monitor_flush(sd_network_monitor *m) {
+        union inotify_event_buffer buffer;
+        struct inotify_event *e;
+        ssize_t l;
+        int fd, k;
+
+        assert_return(m, -EINVAL);
+
+        fd = MONITOR_TO_FD(m);
+
+        l = read(fd, &buffer, sizeof(buffer));
+        if (l < 0) {
+                if (errno == EAGAIN || errno == EINTR)
+                        return 0;
+
+                return -errno;
+        }
+
+        FOREACH_INOTIFY_EVENT(e, buffer, l) {
+                if (e->mask & IN_ISDIR) {
+                        k = monitor_add_inotify_watch(fd);
+                        if (k < 0)
+                                return k;
+
+                        k = inotify_rm_watch(fd, e->wd);
+                        if (k < 0)
+                                return -errno;
+                }
+        }
+
+        return 0;
+}
+
+_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;
+}