/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2014 Lennart Poettering 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 <stdbool.h> #include <getopt.h> #include "sd-network.h" #include "sd-rtnl.h" #include "libudev.h" #include "build.h" #include "util.h" #include "pager.h" #include "rtnl-util.h" #include "udev-util.h" #include "arphrd-list.h" #include "local-addresses.h" #include "socket-util.h" static bool arg_no_pager = false; static bool arg_legend = true; static bool arg_all = false; static void pager_open_if_enabled(void) { if (arg_no_pager) return; pager_open(false); } static int link_get_type_string(int iftype, struct udev_device *d, char **ret) { const char *t; char *p; if (iftype == ARPHRD_ETHER && d) { const char *devtype, *id = NULL; /* WLANs have iftype ARPHRD_ETHER, but we want * to show a more useful type string for * them */ devtype = udev_device_get_devtype(d); if (streq_ptr(devtype, "wlan")) id = "wlan"; else if (streq_ptr(devtype, "wwan")) id = "wwan"; if (id) { p = strdup(id); if (!p) return -ENOMEM; *ret = p; return 1; } } t = arphrd_to_name(iftype); if (!t) { *ret = NULL; return 0; } p = strdup(t); if (!p) return -ENOMEM; ascii_strlower(p); *ret = p; return 0; } typedef struct LinkInfo { const char *name; int ifindex; unsigned iftype; } LinkInfo; static int link_info_compare(const void *a, const void *b) { const LinkInfo *x = a, *y = b; return x->ifindex - y->ifindex; } static int decode_and_sort_links(sd_rtnl_message *m, LinkInfo **ret) { _cleanup_free_ LinkInfo *links = NULL; size_t size = 0, c = 0; sd_rtnl_message *i; int r; for (i = m; i; i = sd_rtnl_message_next(i)) { const char *name; unsigned iftype; uint16_t type; int ifindex; r = sd_rtnl_message_get_type(i, &type); if (r < 0) return r; if (type != RTM_NEWLINK) continue; r = sd_rtnl_message_link_get_ifindex(i, &ifindex); if (r < 0) return r; r = sd_rtnl_message_read_string(i, IFLA_IFNAME, &name); if (r < 0) return r; r = sd_rtnl_message_link_get_type(i, &iftype); if (r < 0) return r; if (!GREEDY_REALLOC(links, size, c+1)) return -ENOMEM; links[c].name = name; links[c].ifindex = ifindex; links[c].iftype = iftype; c++; } qsort_safe(links, c, sizeof(LinkInfo), link_info_compare); *ret = links; links = NULL; return (int) c; } static void operational_state_to_color(const char *state, const char **on, const char **off) { assert(on); assert(off); if (streq_ptr(state, "routable")) { *on = ansi_highlight_green(); *off = ansi_highlight_off(); } else if (streq_ptr(state, "degraded")) { *on = ansi_highlight_yellow(); *off = ansi_highlight_off(); } else *on = *off = ""; } static void setup_state_to_color(const char *state, const char **on, const char **off) { assert(on); assert(off); if (streq_ptr(state, "configured")) { *on = ansi_highlight_green(); *off = ansi_highlight_off(); } else if (streq_ptr(state, "configuring")) { *on = ansi_highlight_yellow(); *off = ansi_highlight_off(); } else if (streq_ptr(state, "failed") || streq_ptr(state, "linger")) { *on = ansi_highlight_red(); *off = ansi_highlight_off(); } else *on = *off = ""; } static int list_links(char **args, unsigned n) { _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL; _cleanup_udev_unref_ struct udev *udev = NULL; _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL; _cleanup_free_ LinkInfo *links = NULL; int r, c, i; pager_open_if_enabled(); r = sd_rtnl_open(&rtnl, 0); if (r < 0) return log_error_errno(r, "Failed to connect to netlink: %m"); udev = udev_new(); if (!udev) return log_error_errno(errno, "Failed to connect to udev: %m"); r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0); if (r < 0) return rtnl_log_create_error(r); r = sd_rtnl_message_request_dump(req, true); if (r < 0) return rtnl_log_create_error(r); r = sd_rtnl_call(rtnl, req, 0, &reply); if (r < 0) return log_error_errno(r, "Failed to enumerate links: %m"); if (arg_legend) printf("%3s %-16s %-18s %-11s %-10s\n", "IDX", "LINK", "TYPE", "OPERATIONAL", "SETUP"); c = decode_and_sort_links(reply, &links); if (c < 0) return rtnl_log_parse_error(c); for (i = 0; i < c; i++) { _cleanup_free_ char *setup_state = NULL, *operational_state = NULL; _cleanup_udev_device_unref_ struct udev_device *d = NULL; const char *on_color_operational, *off_color_operational, *on_color_setup, *off_color_setup; char devid[2 + DECIMAL_STR_MAX(int)]; _cleanup_free_ char *t = NULL; sd_network_link_get_operational_state(links[i].ifindex, &operational_state); operational_state_to_color(operational_state, &on_color_operational, &off_color_operational); sd_network_link_get_setup_state(links[i].ifindex, &setup_state); setup_state_to_color(setup_state, &on_color_setup, &off_color_setup); sprintf(devid, "n%i", links[i].ifindex); d = udev_device_new_from_device_id(udev, devid); link_get_type_string(links[i].iftype, d, &t); printf("%3i %-16s %-18s %s%-11s%s %s%-10s%s\n", links[i].ifindex, links[i].name, strna(t), on_color_operational, strna(operational_state), off_color_operational, on_color_setup, strna(setup_state), off_color_setup); } if (arg_legend) printf("\n%i links listed.\n", c); return 0; } static int dump_addresses(sd_rtnl *rtnl, const char *prefix, int ifindex) { _cleanup_free_ struct local_address *local = NULL; int r, n, i; n = local_addresses(rtnl, ifindex, &local); if (n < 0) return n; for (i = 0; i < n; i++) { _cleanup_free_ char *pretty = NULL; r = in_addr_to_string(local[i].family, &local[i].address, &pretty); if (r < 0) return r; printf("%*s%s\n", (int) strlen(prefix), i == 0 ? prefix : "", pretty); } return 0; } static void dump_list(const char *prefix, char **l) { char **i; STRV_FOREACH(i, l) { printf("%*s%s\n", (int) strlen(prefix), i == l ? prefix : "", *i); } } static int link_status_one(sd_rtnl *rtnl, struct udev *udev, const char *name) { _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **domains = NULL; _cleanup_free_ char *setup_state = NULL, *operational_state = NULL; _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL; _cleanup_udev_device_unref_ struct udev_device *d = NULL; char devid[2 + DECIMAL_STR_MAX(int)]; _cleanup_free_ char *t = NULL, *network = NULL; const char *driver = NULL, *path = NULL, *vendor = NULL, *model = NULL, *link = NULL; const char *on_color_operational, *off_color_operational, *on_color_setup, *off_color_setup; struct ether_addr e; unsigned iftype; int r, ifindex; bool have_mac; uint32_t mtu; assert(rtnl); assert(udev); assert(name); if (safe_atoi(name, &ifindex) >= 0 && ifindex > 0) r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, ifindex); else { r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0); if (r < 0) return rtnl_log_create_error(r); r = sd_rtnl_message_append_string(req, IFLA_IFNAME, name); } if (r < 0) return rtnl_log_create_error(r); r = sd_rtnl_call(rtnl, req, 0, &reply); if (r < 0) return log_error_errno(r, "Failed to query link: %m"); r = sd_rtnl_message_link_get_ifindex(reply, &ifindex); if (r < 0) return rtnl_log_parse_error(r); r = sd_rtnl_message_read_string(reply, IFLA_IFNAME, &name); if (r < 0) return rtnl_log_parse_error(r); r = sd_rtnl_message_link_get_type(reply, &iftype); if (r < 0) return rtnl_log_parse_error(r); have_mac = sd_rtnl_message_read_ether_addr(reply, IFLA_ADDRESS, &e) >= 0; if (have_mac) { const uint8_t *p; bool all_zeroes = true; for (p = (uint8_t*) &e; p < (uint8_t*) &e + sizeof(e); p++) if (*p != 0) { all_zeroes = false; break; } if (all_zeroes) have_mac = false; } sd_rtnl_message_read_u32(reply, IFLA_MTU, &mtu); sd_network_link_get_operational_state(ifindex, &operational_state); operational_state_to_color(operational_state, &on_color_operational, &off_color_operational); sd_network_link_get_setup_state(ifindex, &setup_state); setup_state_to_color(setup_state, &on_color_setup, &off_color_setup); sd_network_link_get_dns(ifindex, &dns); sd_network_link_get_ntp(ifindex, &ntp); sd_network_link_get_domains(ifindex, &domains); r = sd_network_link_get_wildcard_domain(ifindex); if (r > 0) { char *wildcard; wildcard = strdup("*"); if (!wildcard) return log_oom(); if (strv_consume(&domains, wildcard) < 0) return log_oom(); } sprintf(devid, "n%i", ifindex); d = udev_device_new_from_device_id(udev, devid); link_get_type_string(iftype, d, &t); if (d) { link = udev_device_get_property_value(d, "ID_NET_LINK_FILE"); driver = udev_device_get_property_value(d, "ID_NET_DRIVER"); path = udev_device_get_property_value(d, "ID_PATH"); vendor = udev_device_get_property_value(d, "ID_VENDOR_FROM_DATABASE"); if (!vendor) vendor = udev_device_get_property_value(d, "ID_VENDOR"); model = udev_device_get_property_value(d, "ID_MODEL_FROM_DATABASE"); if (!model) model = udev_device_get_property_value(d, "ID_MODEL"); } sd_network_link_get_network_file(ifindex, &network); printf("%s%s%s %i: %s\n", on_color_operational, draw_special_char(DRAW_BLACK_CIRCLE), off_color_operational, ifindex, name); printf(" Link File: %s\n" "Network File: %s\n" " Type: %s\n" " State: %s%s%s (%s%s%s)\n", strna(link), strna(network), strna(t), on_color_operational, strna(operational_state), off_color_operational, on_color_setup, strna(setup_state), off_color_setup); if (path) printf(" Path: %s\n", path); if (driver) printf(" Driver: %s\n", driver); if (vendor) printf(" Vendor: %s\n", vendor); if (model) printf(" Model: %s\n", model); if (have_mac) { char ea[ETHER_ADDR_TO_STRING_MAX]; printf(" HW Address: %s\n", ether_addr_to_string(&e, ea)); } if (mtu > 0) printf(" MTU: %u\n", mtu); dump_addresses(rtnl, " Address: ", ifindex); if (!strv_isempty(dns)) dump_list(" DNS: ", dns); if (!strv_isempty(domains)) dump_list(" Domain: ", domains); if (!strv_isempty(ntp)) dump_list(" NTP: ", ntp); return 0; } static int link_status(char **args, unsigned n) { _cleanup_udev_unref_ struct udev *udev = NULL; _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL; char **name; int r; r = sd_rtnl_open(&rtnl, 0); if (r < 0) return log_error_errno(r, "Failed to connect to netlink: %m"); udev = udev_new(); if (!udev) return log_error_errno(errno, "Failed to connect to udev: %m"); if (n <= 1 && !arg_all) { _cleanup_free_ char *operational_state = NULL; _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **domains = NULL; _cleanup_free_ struct local_address *addresses = NULL; const char *on_color_operational, *off_color_operational; int i, c; sd_network_get_operational_state(&operational_state); operational_state_to_color(operational_state, &on_color_operational, &off_color_operational); printf(" State: %s%s%s\n", on_color_operational, strna(operational_state), off_color_operational); c = local_addresses(rtnl, 0, &addresses); for (i = 0; i < c; i++) { _cleanup_free_ char *pretty = NULL; r = in_addr_to_string(addresses[i].family, &addresses[i].address, &pretty); if (r < 0) return log_oom(); printf("%13s %s\n", i > 0 ? "" : "Address:", pretty); } sd_network_get_dns(&dns); if (!strv_isempty(dns)) dump_list(" DNS: ", dns); sd_network_get_domains(&domains); if (!strv_isempty(domains)) dump_list(" Domain: ", domains); sd_network_get_ntp(&ntp); if (!strv_isempty(ntp)) dump_list(" NTP: ", ntp); return 0; } pager_open_if_enabled(); if (arg_all) { _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL; _cleanup_free_ LinkInfo *links = NULL; int c, i; r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0); if (r < 0) return rtnl_log_create_error(r); r = sd_rtnl_message_request_dump(req, true); if (r < 0) return rtnl_log_create_error(r); r = sd_rtnl_call(rtnl, req, 0, &reply); if (r < 0) return log_error_errno(r, "Failed to enumerate links: %m"); c = decode_and_sort_links(reply, &links); if (c < 0) return rtnl_log_parse_error(c); for (i = 0; i < c; i++) { if (i > 0) fputc('\n', stdout); link_status_one(rtnl, udev, links[i].name); } } STRV_FOREACH(name, args + 1) { if (name != args+1) fputc('\n', stdout); link_status_one(rtnl, udev, *name); } return 0; } static void help(void) { printf("%s [OPTIONS...]\n\n" "Query and control the networking subsystem.\n\n" " -h --help Show this help\n" " --version Show package version\n" " --no-pager Do not pipe output into a pager\n" " --no-legend Do not show the headers and footers\n" " -a --all Show status for all links\n\n" "Commands:\n" " list List links\n" " status LINK Show link status\n" , program_invocation_short_name); } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_NO_PAGER, ARG_NO_LEGEND, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "no-pager", no_argument, NULL, ARG_NO_PAGER }, { "no-legend", no_argument, NULL, ARG_NO_LEGEND }, { "all", no_argument, NULL, 'a' }, {} }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "ha", options, NULL)) >= 0) { switch (c) { case 'h': help(); return 0; case ARG_VERSION: puts(PACKAGE_STRING); puts(SYSTEMD_FEATURES); return 0; case ARG_NO_PAGER: arg_no_pager = true; break; case ARG_NO_LEGEND: arg_legend = false; break; case 'a': arg_all = true; break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } } return 1; } static int networkctl_main(int argc, char *argv[]) { static const struct { const char* verb; const enum { MORE, LESS, EQUAL } argc_cmp; const int argc; int (* const dispatch)(char **args, unsigned n); } verbs[] = { { "list", LESS, 1, list_links }, { "status", MORE, 1, link_status }, }; int left; unsigned i; assert(argc >= 0); assert(argv); left = argc - optind; if (left <= 0) /* Special rule: no arguments means "list" */ i = 0; else { if (streq(argv[optind], "help")) { help(); return 0; } for (i = 0; i < ELEMENTSOF(verbs); i++) if (streq(argv[optind], verbs[i].verb)) break; if (i >= ELEMENTSOF(verbs)) { log_error("Unknown operation %s", argv[optind]); return -EINVAL; } } switch (verbs[i].argc_cmp) { case EQUAL: if (left != verbs[i].argc) { log_error("Invalid number of arguments."); return -EINVAL; } break; case MORE: if (left < verbs[i].argc) { log_error("Too few arguments."); return -EINVAL; } break; case LESS: if (left > verbs[i].argc) { log_error("Too many arguments."); return -EINVAL; } break; default: assert_not_reached("Unknown comparison operator."); } return verbs[i].dispatch(argv + optind, left); } int main(int argc, char* argv[]) { int r; log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) goto finish; r = networkctl_main(argc, argv); finish: pager_close(); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }