8434fd5cf2
This is the state when we are waiting for udev to initialize the device, and waiting for libudev and rtnl to be in sync. In the future we probably will also be waiting for nl80211. At this point we do not yet have enough information to know whether or not networkd should be handling the device.
293 lines
7.4 KiB
C
293 lines
7.4 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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Copyright 2014 Tom Gundersen
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/inotify.h>
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#include <sys/poll.h>
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#include <net/if.h>
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#include "util.h"
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#include "macro.h"
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#include "strv.h"
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#include "fileio.h"
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#include "sd-network.h"
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#include "network-internal.h"
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_public_ int sd_network_get_operational_state(char **state) {
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_cleanup_free_ char *s = NULL;
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int r;
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assert_return(state, -EINVAL);
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r = parse_env_file("/run/systemd/netif/state", NEWLINE, "OPER_STATE", &s, NULL);
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if (r == -ENOENT)
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return -ENODATA;
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if (r < 0)
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return r;
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if (isempty(s))
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return -ENODATA;
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*state = s;
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s = NULL;
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return 0;
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}
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static int network_get_strv(const char *key, char ***ret) {
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_cleanup_strv_free_ char **a = NULL;
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_cleanup_free_ char *s = NULL;
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int r;
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assert_return(ret, -EINVAL);
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r = parse_env_file("/run/systemd/netif/state", NEWLINE, key, &s, NULL);
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if (r == -ENOENT)
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return -ENODATA;
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if (r < 0)
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return r;
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if (isempty(s)) {
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*ret = NULL;
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return 0;
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}
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a = strv_split(s, " ");
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if (!a)
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return -ENOMEM;
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strv_uniq(a);
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r = strv_length(a);
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*ret = a;
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a = NULL;
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return r;
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}
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_public_ int sd_network_get_dns(char ***ret) {
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return network_get_strv("DNS", ret);
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}
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_public_ int sd_network_get_ntp(char ***ret) {
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return network_get_strv("NTP", ret);
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}
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_public_ int sd_network_get_link_state(int ifindex, char **state) {
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_cleanup_free_ char *s = NULL, *p = NULL;
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int r;
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assert_return(ifindex > 0, -EINVAL);
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assert_return(state, -EINVAL);
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if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
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return -ENOMEM;
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r = parse_env_file(p, NEWLINE, "ADMIN_STATE", &s, NULL);
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if (r == -ENOENT)
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return -ENODATA;
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if (r < 0)
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return r;
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if (isempty(s))
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return -ENODATA;
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*state = s;
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s = NULL;
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return 0;
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}
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_public_ int sd_network_get_link_operational_state(int ifindex, char **state) {
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_cleanup_free_ char *s = NULL, *p = NULL;
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int r;
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assert_return(ifindex > 0, -EINVAL);
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assert_return(state, -EINVAL);
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if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
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return -ENOMEM;
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r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL);
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if (r == -ENOENT)
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return -ENODATA;
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if (r < 0)
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return r;
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if (isempty(s))
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return -ENODATA;
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*state = s;
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s = NULL;
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return 0;
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}
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_public_ int sd_network_get_link_llmnr(int ifindex, char **llmnr) {
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_cleanup_free_ char *s = NULL, *p = NULL;
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int r;
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assert_return(ifindex > 0, -EINVAL);
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assert_return(llmnr, -EINVAL);
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if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
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return -ENOMEM;
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r = parse_env_file(p, NEWLINE, "LLMNR", &s, NULL);
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if (r == -ENOENT)
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return -ENODATA;
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if (r < 0)
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return r;
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if (isempty(s))
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return -ENODATA;
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*llmnr = s;
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s = NULL;
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return 0;
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}
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static int network_get_link_strv(const char *key, int ifindex, char ***ret) {
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_cleanup_free_ char *p = NULL, *s = NULL;
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_cleanup_strv_free_ char **a = NULL;
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int r;
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assert_return(ifindex > 0, -EINVAL);
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assert_return(ret, -EINVAL);
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if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0)
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return -ENOMEM;
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r = parse_env_file(p, NEWLINE, key, &s, NULL);
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if (r == -ENOENT)
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return -ENODATA;
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if (r < 0)
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return r;
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if (isempty(s)) {
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*ret = NULL;
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return 0;
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}
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a = strv_split(s, " ");
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if (!a)
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return -ENOMEM;
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strv_uniq(a);
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r = strv_length(a);
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*ret = a;
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a = NULL;
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return r;
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}
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_public_ int sd_network_get_link_dns(int ifindex, char ***ret) {
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return network_get_link_strv("DNS", ifindex, ret);
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}
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_public_ int sd_network_get_link_ntp(int ifindex, char ***ret) {
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return network_get_link_strv("NTP", ifindex, ret);
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}
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static inline int MONITOR_TO_FD(sd_network_monitor *m) {
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return (int) (unsigned long) m - 1;
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}
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static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
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return (sd_network_monitor*) (unsigned long) (fd + 1);
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}
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_public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) {
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int fd, k;
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bool good = false;
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assert_return(m, -EINVAL);
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fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
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if (fd < 0)
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return -errno;
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if (!category || streq(category, "links")) {
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k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE);
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if (k < 0) {
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safe_close(fd);
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return -errno;
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}
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good = true;
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}
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if (!good) {
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close_nointr(fd);
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return -EINVAL;
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}
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*m = FD_TO_MONITOR(fd);
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return 0;
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}
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_public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
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int fd;
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assert_return(m, NULL);
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fd = MONITOR_TO_FD(m);
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close_nointr(fd);
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return NULL;
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}
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_public_ int sd_network_monitor_flush(sd_network_monitor *m) {
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assert_return(m, -EINVAL);
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return flush_fd(MONITOR_TO_FD(m));
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}
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_public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
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assert_return(m, -EINVAL);
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return MONITOR_TO_FD(m);
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}
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_public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
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assert_return(m, -EINVAL);
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/* For now we will only return POLLIN here, since we don't
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* need anything else ever for inotify. However, let's have
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* this API to keep our options open should we later on need
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* it. */
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return POLLIN;
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}
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_public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
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assert_return(m, -EINVAL);
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assert_return(timeout_usec, -EINVAL);
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/* For now we will only return (uint64_t) -1, since we don't
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* need any timeout. However, let's have this API to keep our
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* options open should we later on need it. */
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*timeout_usec = (uint64_t) -1;
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return 0;
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}
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