/*-*- 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 . ***/ #include #include #include #include #include #include #include "util.h" #include "macro.h" #include "strv.h" #include "fileio.h" #include "sd-network.h" #include "network-internal.h" #include "dhcp-lease-internal.h" _public_ int sd_network_get_link_state(int ifindex, char **state) { _cleanup_free_ char *s = NULL, *p = NULL; int r; assert_return(ifindex > 0, -EINVAL); assert_return(state, -EINVAL); if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) return -ENOMEM; r = parse_env_file(p, NEWLINE, "ADMIN_STATE", &s, NULL); if (r == -ENOENT) return -ENODATA; else if (r < 0) return r; else if (!s) return -EIO; if (streq(s, "initializing")) return -EBUSY; *state = s; s = NULL; return 0; } _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; else if (r < 0) return r; else if (!s) return -EIO; *state = s; s = NULL; return 0; } _public_ int sd_network_get_link_operational_state(int ifindex, char **state) { _cleanup_free_ char *s = NULL, *p = NULL; int r; assert_return(ifindex > 0, -EINVAL); assert_return(state, -EINVAL); if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) return -ENOMEM; r = parse_env_file(p, NEWLINE, "OPER_STATE", &s, NULL); if (r == -ENOENT) return -ENODATA; else if (r < 0) return r; else if (!s) return -EIO; *state = s; s = NULL; return 0; } _public_ int sd_network_get_link_llmnr(int ifindex, char **llmnr) { _cleanup_free_ char *s = NULL, *p = NULL; int r; assert_return(ifindex > 0, -EINVAL); assert_return(llmnr, -EINVAL); if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) return -ENOMEM; r = parse_env_file(p, NEWLINE, "LLMNR", &s, NULL); if (r == -ENOENT) return -ENODATA; else if (r < 0) return r; else if (!s) return -ENODATA; *llmnr = s; s = NULL; return 0; } _public_ int sd_network_get_link_dhcp_lease(int ifindex, sd_dhcp_lease **ret) { _cleanup_free_ char *p = NULL, *s = NULL; sd_dhcp_lease *lease = NULL; int r; assert_return(ifindex > 0, -EINVAL); assert_return(ret, -EINVAL); if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) return -ENOMEM; r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL); if (r < 0) return r; else if (!s) return -EIO; r = dhcp_lease_load(s, &lease); if (r < 0) return r; *ret = lease; return 0; } static int network_get_link_strv(const char *key, int ifindex, char ***ret) { _cleanup_free_ char *p = NULL, *s = NULL; _cleanup_strv_free_ char **a = NULL; int r; assert_return(ifindex > 0, -EINVAL); assert_return(ret, -EINVAL); if (asprintf(&p, "/run/systemd/netif/links/%d", ifindex) < 0) return -ENOMEM; r = parse_env_file(p, NEWLINE, key, &s, NULL); if (r < 0) return r; else if (!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_link_dns(int ifindex, char ***ret) { return network_get_link_strv("DNS", ifindex, ret); } _public_ int sd_network_get_link_ntp(int ifindex, char ***ret) { return network_get_link_strv("NTP", ifindex, 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); } _public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category) { 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, "links")) { k = inotify_add_watch(fd, "/run/systemd/netif/links/", IN_MOVED_TO|IN_DELETE); if (k < 0) { safe_close(fd); return -errno; } good = true; } if (!category || streq(category, "leases")) { k = inotify_add_watch(fd, "/run/systemd/netif/leases/", IN_MOVED_TO|IN_DELETE); if (k < 0) { safe_close(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; }