diff options
Diffstat (limited to 'src/grp-network/networkctl/networkctl.c')
| -rw-r--r-- | src/grp-network/networkctl/networkctl.c | 1141 |
1 files changed, 1141 insertions, 0 deletions
diff --git a/src/grp-network/networkctl/networkctl.c b/src/grp-network/networkctl/networkctl.c new file mode 100644 index 0000000000..bc95b4fb24 --- /dev/null +++ b/src/grp-network/networkctl/networkctl.c @@ -0,0 +1,1141 @@ +/*** + 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 <getopt.h> +#include <net/if.h> +#include <stdbool.h> + +#include "sd-device/device-util.h" +#include "sd-hwdb/hwdb-util.h" +#include "sd-netlink/local-addresses.h" +#include "sd-netlink/netlink-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/arphrd-list.h" +#include "systemd-basic/ether-addr-util.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/locale-util.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/socket-util.h" +#include "systemd-basic/sparse-endian.h" +#include "systemd-basic/stdio-util.h" +#include "systemd-basic/string-table.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/strxcpyx.h" +#include "systemd-basic/terminal-util.h" +#include "systemd-basic/util.h" +#include "systemd-basic/verbs.h" +#include "systemd-network/sd-lldp.h" +#include "systemd-shared/pager.h" +#include "systemd-staging/sd-device.h" +#include "systemd-staging/sd-hwdb.h" +#include "systemd-staging/sd-netlink.h" +#include "systemd-staging/sd-network.h" + +static bool arg_no_pager = false; +static bool arg_legend = true; +static bool arg_all = false; + +static int link_get_type_string(unsigned short iftype, sd_device *d, char **ret) { + const char *t; + char *p; + + assert(ret); + + if (iftype == ARPHRD_ETHER && d) { + const char *devtype = NULL, *id = NULL; + /* WLANs have iftype ARPHRD_ETHER, but we want + * to show a more useful type string for + * them */ + + (void) sd_device_get_devtype(d, &devtype); + + 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; +} + +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_normal(); + } else if (streq_ptr(state, "degraded")) { + *on = ansi_highlight_yellow(); + *off = ansi_normal(); + } 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_normal(); + } else if (streq_ptr(state, "configuring")) { + *on = ansi_highlight_yellow(); + *off = ansi_normal(); + } else if (STRPTR_IN_SET(state, "failed", "linger")) { + *on = ansi_highlight_red(); + *off = ansi_normal(); + } else + *on = *off = ""; +} + +typedef struct LinkInfo { + char name[IFNAMSIZ+1]; + int ifindex; + unsigned short iftype; + struct ether_addr mac_address; + uint32_t mtu; + + bool has_mac_address:1; + bool has_mtu:1; +} 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_link(sd_netlink_message *m, LinkInfo *info) { + const char *name; + uint16_t type; + int r; + + assert(m); + assert(info); + + r = sd_netlink_message_get_type(m, &type); + if (r < 0) + return r; + + if (type != RTM_NEWLINK) + return 0; + + r = sd_rtnl_message_link_get_ifindex(m, &info->ifindex); + if (r < 0) + return r; + + r = sd_netlink_message_read_string(m, IFLA_IFNAME, &name); + if (r < 0) + return r; + + r = sd_rtnl_message_link_get_type(m, &info->iftype); + if (r < 0) + return r; + + strscpy(info->name, sizeof info->name, name); + + info->has_mac_address = + sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &info->mac_address) >= 0 && + memcmp(&info->mac_address, ÐER_ADDR_NULL, sizeof(struct ether_addr)) != 0; + + info->has_mtu = + sd_netlink_message_read_u32(m, IFLA_MTU, &info->mtu) && + info->mtu > 0; + + return 1; +} + +static int acquire_link_info_strv(sd_netlink *rtnl, char **l, LinkInfo **ret) { + _cleanup_free_ LinkInfo *links = NULL; + char **i; + size_t c = 0; + int r; + + assert(rtnl); + assert(ret); + + links = new(LinkInfo, strv_length(l)); + if (!links) + return log_oom(); + + STRV_FOREACH(i, l) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; + int ifindex; + + if (parse_ifindex(*i, &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_netlink_message_append_string(req, IFLA_IFNAME, *i); + } + if (r < 0) + return rtnl_log_create_error(r); + + r = sd_netlink_call(rtnl, req, 0, &reply); + if (r < 0) + return log_error_errno(r, "Failed to request link: %m"); + + r = decode_link(reply, links + c); + if (r < 0) + return r; + if (r > 0) + c++; + } + + qsort_safe(links, c, sizeof(LinkInfo), link_info_compare); + + *ret = links; + links = NULL; + + return (int) c; +} + +static int acquire_link_info_all(sd_netlink *rtnl, LinkInfo **ret) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; + _cleanup_free_ LinkInfo *links = NULL; + size_t allocated = 0, c = 0; + sd_netlink_message *i; + int r; + + assert(rtnl); + assert(ret); + + r = sd_rtnl_message_new_link(rtnl, &req, RTM_GETLINK, 0); + if (r < 0) + return rtnl_log_create_error(r); + + r = sd_netlink_message_request_dump(req, true); + if (r < 0) + return rtnl_log_create_error(r); + + r = sd_netlink_call(rtnl, req, 0, &reply); + if (r < 0) + return log_error_errno(r, "Failed to enumerate links: %m"); + + for (i = reply; i; i = sd_netlink_message_next(i)) { + if (!GREEDY_REALLOC(links, allocated, c+1)) + return -ENOMEM; + + r = decode_link(i, links + c); + if (r < 0) + return r; + if (r > 0) + c++; + } + + qsort_safe(links, c, sizeof(LinkInfo), link_info_compare); + + *ret = links; + links = NULL; + + return (int) c; +} + +static int list_links(int argc, char *argv[], void *userdata) { + _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; + _cleanup_free_ LinkInfo *links = NULL; + int c, i, r; + + r = sd_netlink_open(&rtnl); + if (r < 0) + return log_error_errno(r, "Failed to connect to netlink: %m"); + + if (argc > 1) + c = acquire_link_info_strv(rtnl, argv + 1, &links); + else + c = acquire_link_info_all(rtnl, &links); + if (c < 0) + return c; + + pager_open(arg_no_pager, false); + + if (arg_legend) + printf("%3s %-16s %-18s %-11s %-10s\n", + "IDX", + "LINK", + "TYPE", + "OPERATIONAL", + "SETUP"); + + for (i = 0; i < c; i++) { + _cleanup_free_ char *setup_state = NULL, *operational_state = NULL; + _cleanup_(sd_device_unrefp) sd_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; + + (void) sd_network_link_get_operational_state(links[i].ifindex, &operational_state); + operational_state_to_color(operational_state, &on_color_operational, &off_color_operational); + + r = sd_network_link_get_setup_state(links[i].ifindex, &setup_state); + if (r == -ENODATA) /* If there's no info available about this iface, it's unmanaged by networkd */ + setup_state = strdup("unmanaged"); + setup_state_to_color(setup_state, &on_color_setup, &off_color_setup); + + xsprintf(devid, "n%i", links[i].ifindex); + (void) sd_device_new_from_device_id(&d, devid); + + (void) 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; +} + +/* IEEE Organizationally Unique Identifier vendor string */ +static int ieee_oui(sd_hwdb *hwdb, const struct ether_addr *mac, char **ret) { + const char *description; + char modalias[strlen("OUI:XXYYXXYYXXYY") + 1], *desc; + int r; + + assert(ret); + + if (!hwdb) + return -EINVAL; + + if (!mac) + return -EINVAL; + + /* skip commonly misused 00:00:00 (Xerox) prefix */ + if (memcmp(mac, "\0\0\0", 3) == 0) + return -EINVAL; + + xsprintf(modalias, "OUI:" ETHER_ADDR_FORMAT_STR, + ETHER_ADDR_FORMAT_VAL(*mac)); + + r = sd_hwdb_get(hwdb, modalias, "ID_OUI_FROM_DATABASE", &description); + if (r < 0) + return r; + + desc = strdup(description); + if (!desc) + return -ENOMEM; + + *ret = desc; + + return 0; +} + +static int get_gateway_description( + sd_netlink *rtnl, + sd_hwdb *hwdb, + int ifindex, + int family, + union in_addr_union *gateway, + char **gateway_description) { + _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL; + sd_netlink_message *m; + int r; + + assert(rtnl); + assert(ifindex >= 0); + assert(family == AF_INET || family == AF_INET6); + assert(gateway); + assert(gateway_description); + + r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_GETNEIGH, ifindex, family); + if (r < 0) + return r; + + r = sd_netlink_message_request_dump(req, true); + if (r < 0) + return r; + + r = sd_netlink_call(rtnl, req, 0, &reply); + if (r < 0) + return r; + + for (m = reply; m; m = sd_netlink_message_next(m)) { + union in_addr_union gw = {}; + struct ether_addr mac = {}; + uint16_t type; + int ifi, fam; + + r = sd_netlink_message_get_errno(m); + if (r < 0) { + log_error_errno(r, "got error: %m"); + continue; + } + + r = sd_netlink_message_get_type(m, &type); + if (r < 0) { + log_error_errno(r, "could not get type: %m"); + continue; + } + + if (type != RTM_NEWNEIGH) { + log_error("type is not RTM_NEWNEIGH"); + continue; + } + + r = sd_rtnl_message_neigh_get_family(m, &fam); + if (r < 0) { + log_error_errno(r, "could not get family: %m"); + continue; + } + + if (fam != family) { + log_error("family is not correct"); + continue; + } + + r = sd_rtnl_message_neigh_get_ifindex(m, &ifi); + if (r < 0) { + log_error_errno(r, "could not get ifindex: %m"); + continue; + } + + if (ifindex > 0 && ifi != ifindex) + continue; + + switch (fam) { + case AF_INET: + r = sd_netlink_message_read_in_addr(m, NDA_DST, &gw.in); + if (r < 0) + continue; + + break; + case AF_INET6: + r = sd_netlink_message_read_in6_addr(m, NDA_DST, &gw.in6); + if (r < 0) + continue; + + break; + default: + continue; + } + + if (!in_addr_equal(fam, &gw, gateway)) + continue; + + r = sd_netlink_message_read_ether_addr(m, NDA_LLADDR, &mac); + if (r < 0) + continue; + + r = ieee_oui(hwdb, &mac, gateway_description); + if (r < 0) + continue; + + return 0; + } + + return -ENODATA; +} + +static int dump_gateways( + sd_netlink *rtnl, + sd_hwdb *hwdb, + const char *prefix, + int ifindex) { + _cleanup_free_ struct local_address *local = NULL; + int r, n, i; + + assert(rtnl); + assert(prefix); + + n = local_gateways(rtnl, ifindex, AF_UNSPEC, &local); + if (n < 0) + return n; + + for (i = 0; i < n; i++) { + _cleanup_free_ char *gateway = NULL, *description = NULL; + + r = in_addr_to_string(local[i].family, &local[i].address, &gateway); + if (r < 0) + return r; + + r = get_gateway_description(rtnl, hwdb, local[i].ifindex, local[i].family, &local[i].address, &description); + if (r < 0) + log_debug_errno(r, "Could not get description of gateway: %m"); + + printf("%*s%s", + (int) strlen(prefix), + i == 0 ? prefix : "", + gateway); + + if (description) + printf(" (%s)", description); + + /* Show interface name for the entry if we show + * entries for all interfaces */ + if (ifindex <= 0) { + char name[IF_NAMESIZE+1]; + + if (if_indextoname(local[i].ifindex, name)) { + fputs(" on ", stdout); + fputs(name, stdout); + } else + printf(" on %%%i", local[i].ifindex); + } + + fputc('\n', stdout); + } + + return 0; +} + +static int dump_addresses( + sd_netlink *rtnl, + const char *prefix, + int ifindex) { + + _cleanup_free_ struct local_address *local = NULL; + int r, n, i; + + assert(rtnl); + assert(prefix); + + n = local_addresses(rtnl, ifindex, AF_UNSPEC, &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", + (int) strlen(prefix), + i == 0 ? prefix : "", + pretty); + + if (ifindex <= 0) { + char name[IF_NAMESIZE+1]; + + if (if_indextoname(local[i].ifindex, name)) { + fputs(" on ", stdout); + fputs(name, stdout); + } else + printf(" on %%%i", local[i].ifindex); + } + + fputc('\n', stdout); + } + + return 0; +} + +static int open_lldp_neighbors(int ifindex, FILE **ret) { + _cleanup_free_ char *p = NULL; + FILE *f; + + if (asprintf(&p, "/run/systemd/netif/lldp/%i", ifindex) < 0) + return -ENOMEM; + + f = fopen(p, "re"); + if (!f) + return -errno; + + *ret = f; + return 0; +} + +static int next_lldp_neighbor(FILE *f, sd_lldp_neighbor **ret) { + _cleanup_free_ void *raw = NULL; + size_t l; + le64_t u; + int r; + + assert(f); + assert(ret); + + l = fread(&u, 1, sizeof(u), f); + if (l == 0 && feof(f)) + return 0; + if (l != sizeof(u)) + return -EBADMSG; + + raw = new(uint8_t, le64toh(u)); + if (!raw) + return -ENOMEM; + + if (fread(raw, 1, le64toh(u), f) != le64toh(u)) + return -EBADMSG; + + r = sd_lldp_neighbor_from_raw(ret, raw, le64toh(u)); + if (r < 0) + return r; + + return 1; +} + +static int dump_lldp_neighbors(const char *prefix, int ifindex) { + _cleanup_fclose_ FILE *f = NULL; + int r, c = 0; + + assert(prefix); + assert(ifindex > 0); + + r = open_lldp_neighbors(ifindex, &f); + if (r < 0) + return r; + + for (;;) { + const char *system_name = NULL, *port_id = NULL, *port_description = NULL; + _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL; + + r = next_lldp_neighbor(f, &n); + if (r < 0) + return r; + if (r == 0) + break; + + printf("%*s", + (int) strlen(prefix), + c == 0 ? prefix : ""); + + (void) sd_lldp_neighbor_get_system_name(n, &system_name); + (void) sd_lldp_neighbor_get_port_id_as_string(n, &port_id); + (void) sd_lldp_neighbor_get_port_description(n, &port_description); + + printf("%s on port %s", strna(system_name), strna(port_id)); + + if (!isempty(port_description)) + printf(" (%s)", port_description); + + putchar('\n'); + + c++; + } + + return c; +} + +static void dump_ifindexes(const char *prefix, const int *ifindexes) { + unsigned c; + + assert(prefix); + + if (!ifindexes || ifindexes[0] <= 0) + return; + + for (c = 0; ifindexes[c] > 0; c++) { + char name[IF_NAMESIZE+1]; + + printf("%*s", + (int) strlen(prefix), + c == 0 ? prefix : ""); + + if (if_indextoname(ifindexes[c], name)) + fputs(name, stdout); + else + printf("%i", ifindexes[c]); + + fputc('\n', stdout); + } +} + +static void dump_list(const char *prefix, char **l) { + char **i; + + if (strv_isempty(l)) + return; + + STRV_FOREACH(i, l) { + printf("%*s%s\n", + (int) strlen(prefix), + i == l ? prefix : "", + *i); + } +} + +static int link_status_one( + sd_netlink *rtnl, + sd_hwdb *hwdb, + const LinkInfo *info) { + + _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **search_domains = NULL, **route_domains = NULL; + _cleanup_free_ char *setup_state = NULL, *operational_state = NULL, *tz = NULL; + _cleanup_(sd_device_unrefp) sd_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; + _cleanup_free_ int *carrier_bound_to = NULL, *carrier_bound_by = NULL; + int r; + + assert(rtnl); + assert(info); + + (void) sd_network_link_get_operational_state(info->ifindex, &operational_state); + operational_state_to_color(operational_state, &on_color_operational, &off_color_operational); + + r = sd_network_link_get_setup_state(info->ifindex, &setup_state); + if (r == -ENODATA) /* If there's no info available about this iface, it's unmanaged by networkd */ + setup_state = strdup("unmanaged"); + setup_state_to_color(setup_state, &on_color_setup, &off_color_setup); + + (void) sd_network_link_get_dns(info->ifindex, &dns); + (void) sd_network_link_get_search_domains(info->ifindex, &search_domains); + (void) sd_network_link_get_route_domains(info->ifindex, &route_domains); + (void) sd_network_link_get_ntp(info->ifindex, &ntp); + + xsprintf(devid, "n%i", info->ifindex); + + (void) sd_device_new_from_device_id(&d, devid); + + if (d) { + (void) sd_device_get_property_value(d, "ID_NET_LINK_FILE", &link); + (void) sd_device_get_property_value(d, "ID_NET_DRIVER", &driver); + (void) sd_device_get_property_value(d, "ID_PATH", &path); + + r = sd_device_get_property_value(d, "ID_VENDOR_FROM_DATABASE", &vendor); + if (r < 0) + (void) sd_device_get_property_value(d, "ID_VENDOR", &vendor); + + r = sd_device_get_property_value(d, "ID_MODEL_FROM_DATABASE", &model); + if (r < 0) + (void) sd_device_get_property_value(d, "ID_MODEL", &model); + } + + (void) link_get_type_string(info->iftype, d, &t); + + (void) sd_network_link_get_network_file(info->ifindex, &network); + + (void) sd_network_link_get_carrier_bound_to(info->ifindex, &carrier_bound_to); + (void) sd_network_link_get_carrier_bound_by(info->ifindex, &carrier_bound_by); + + printf("%s%s%s %i: %s\n", on_color_operational, special_glyph(BLACK_CIRCLE), off_color_operational, info->ifindex, info->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 (info->has_mac_address) { + _cleanup_free_ char *description = NULL; + char ea[ETHER_ADDR_TO_STRING_MAX]; + + (void) ieee_oui(hwdb, &info->mac_address, &description); + + if (description) + printf(" HW Address: %s (%s)\n", ether_addr_to_string(&info->mac_address, ea), description); + else + printf(" HW Address: %s\n", ether_addr_to_string(&info->mac_address, ea)); + } + + if (info->has_mtu) + printf(" MTU: %u\n", info->mtu); + + (void) dump_addresses(rtnl, " Address: ", info->ifindex); + (void) dump_gateways(rtnl, hwdb, " Gateway: ", info->ifindex); + + dump_list(" DNS: ", dns); + dump_list(" Search Domains: ", search_domains); + dump_list(" Route Domains: ", route_domains); + + dump_list(" NTP: ", ntp); + + dump_ifindexes("Carrier Bound To: ", carrier_bound_to); + dump_ifindexes("Carrier Bound By: ", carrier_bound_by); + + (void) sd_network_link_get_timezone(info->ifindex, &tz); + if (tz) + printf(" Time Zone: %s\n", tz); + + (void) dump_lldp_neighbors(" Connected To: ", info->ifindex); + + return 0; +} + +static int system_status(sd_netlink *rtnl, sd_hwdb *hwdb) { + _cleanup_free_ char *operational_state = NULL; + _cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **search_domains = NULL, **route_domains = NULL; + const char *on_color_operational, *off_color_operational; + + assert(rtnl); + + (void) sd_network_get_operational_state(&operational_state); + operational_state_to_color(operational_state, &on_color_operational, &off_color_operational); + + printf("%s%s%s State: %s%s%s\n", + on_color_operational, special_glyph(BLACK_CIRCLE), off_color_operational, + on_color_operational, strna(operational_state), off_color_operational); + + (void) dump_addresses(rtnl, " Address: ", 0); + (void) dump_gateways(rtnl, hwdb, " Gateway: ", 0); + + (void) sd_network_get_dns(&dns); + dump_list(" DNS: ", dns); + + (void) sd_network_get_search_domains(&search_domains); + dump_list("Search Domains: ", search_domains); + + (void) sd_network_get_route_domains(&route_domains); + dump_list(" Route Domains: ", route_domains); + + (void) sd_network_get_ntp(&ntp); + dump_list(" NTP: ", ntp); + + return 0; +} + +static int link_status(int argc, char *argv[], void *userdata) { + _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; + _cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb = NULL; + _cleanup_free_ LinkInfo *links = NULL; + int r, c, i; + + pager_open(arg_no_pager, false); + + r = sd_netlink_open(&rtnl); + if (r < 0) + return log_error_errno(r, "Failed to connect to netlink: %m"); + + r = sd_hwdb_new(&hwdb); + if (r < 0) + log_debug_errno(r, "Failed to open hardware database: %m"); + + if (arg_all) + c = acquire_link_info_all(rtnl, &links); + else if (argc <= 1) + return system_status(rtnl, hwdb); + else + c = acquire_link_info_strv(rtnl, argv + 1, &links); + if (c < 0) + return c; + + for (i = 0; i < c; i++) { + if (i > 0) + fputc('\n', stdout); + + link_status_one(rtnl, hwdb, links + i); + } + + return 0; +} + +static char *lldp_capabilities_to_string(uint16_t x) { + static const char characters[] = { + 'o', 'p', 'b', 'w', 'r', 't', 'd', 'a', 'c', 's', 'm', + }; + char *ret; + unsigned i; + + ret = new(char, ELEMENTSOF(characters) + 1); + if (!ret) + return NULL; + + for (i = 0; i < ELEMENTSOF(characters); i++) + ret[i] = (x & (1U << i)) ? characters[i] : '.'; + + ret[i] = 0; + return ret; +} + +static void lldp_capabilities_legend(uint16_t x) { + unsigned w, i, cols = columns(); + static const char* const table[] = { + "o - Other", + "p - Repeater", + "b - Bridge", + "w - WLAN Access Point", + "r - Router", + "t - Telephone", + "d - DOCSIS cable device", + "a - Station", + "c - Customer VLAN", + "s - Service VLAN", + "m - Two-port MAC Relay (TPMR)", + }; + + if (x == 0) + return; + + printf("\nCapability Flags:\n"); + for (w = 0, i = 0; i < ELEMENTSOF(table); i++) + if (x & (1U << i) || arg_all) { + bool newline; + + newline = w + strlen(table[i]) + (w == 0 ? 0 : 2) > cols; + if (newline) + w = 0; + w += printf("%s%s%s", newline ? "\n" : "", w == 0 ? "" : "; ", table[i]); + } + puts(""); +} + +static int link_lldp_status(int argc, char *argv[], void *userdata) { + _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL; + _cleanup_free_ LinkInfo *links = NULL; + int i, r, c, m = 0; + uint16_t all = 0; + + r = sd_netlink_open(&rtnl); + if (r < 0) + return log_error_errno(r, "Failed to connect to netlink: %m"); + + if (argc > 1) + c = acquire_link_info_strv(rtnl, argv + 1, &links); + else + c = acquire_link_info_all(rtnl, &links); + if (c < 0) + return c; + + pager_open(arg_no_pager, false); + + if (arg_legend) + printf("%-16s %-17s %-16s %-11s %-17s %-16s\n", + "LINK", + "CHASSIS ID", + "SYSTEM NAME", + "CAPS", + "PORT ID", + "PORT DESCRIPTION"); + + for (i = 0; i < c; i++) { + _cleanup_fclose_ FILE *f = NULL; + + r = open_lldp_neighbors(links[i].ifindex, &f); + if (r == -ENOENT) + continue; + if (r < 0) { + log_warning_errno(r, "Failed to open LLDP data for %i, ignoring: %m", links[i].ifindex); + continue; + } + + for (;;) { + _cleanup_free_ char *cid = NULL, *pid = NULL, *sname = NULL, *pdesc = NULL; + const char *chassis_id = NULL, *port_id = NULL, *system_name = NULL, *port_description = NULL, *capabilities = NULL; + _cleanup_(sd_lldp_neighbor_unrefp) sd_lldp_neighbor *n = NULL; + uint16_t cc; + + r = next_lldp_neighbor(f, &n); + if (r < 0) { + log_warning_errno(r, "Failed to read neighbor data: %m"); + break; + } + if (r == 0) + break; + + (void) sd_lldp_neighbor_get_chassis_id_as_string(n, &chassis_id); + (void) sd_lldp_neighbor_get_port_id_as_string(n, &port_id); + (void) sd_lldp_neighbor_get_system_name(n, &system_name); + (void) sd_lldp_neighbor_get_port_description(n, &port_description); + + if (chassis_id) { + cid = ellipsize(chassis_id, 17, 100); + if (cid) + chassis_id = cid; + } + + if (port_id) { + pid = ellipsize(port_id, 17, 100); + if (pid) + port_id = pid; + } + + if (system_name) { + sname = ellipsize(system_name, 16, 100); + if (sname) + system_name = sname; + } + + if (port_description) { + pdesc = ellipsize(port_description, 16, 100); + if (pdesc) + port_description = pdesc; + } + + if (sd_lldp_neighbor_get_enabled_capabilities(n, &cc) >= 0) { + capabilities = lldp_capabilities_to_string(cc); + all |= cc; + } + + printf("%-16s %-17s %-16s %-11s %-17s %-16s\n", + links[i].name, + strna(chassis_id), + strna(system_name), + strna(capabilities), + strna(port_id), + strna(port_description)); + + m++; + } + } + + if (arg_legend) { + lldp_capabilities_legend(all); + printf("\n%i neighbors listed.\n", m); + } + + 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 [LINK...] List links\n" + " status [LINK...] Show link status\n" + " lldp [LINK...] Show LLDP neighbors\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: + return version(); + + 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[]) { + const Verb verbs[] = { + { "list", VERB_ANY, VERB_ANY, VERB_DEFAULT, list_links }, + { "status", VERB_ANY, VERB_ANY, 0, link_status }, + { "lldp", VERB_ANY, VERB_ANY, 0, link_lldp_status }, + {} + }; + + return dispatch_verb(argc, argv, verbs, NULL); +} + +static void warn_networkd_missing(void) { + + if (access("/run/systemd/netif/state", F_OK) >= 0) + return; + + fprintf(stderr, "WARNING: systemd-networkd is not running, output will be incomplete.\n\n"); +} + +int main(int argc, char* argv[]) { + int r; + + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r <= 0) + goto finish; + + warn_networkd_missing(); + + r = networkctl_main(argc, argv); + +finish: + pager_close(); + + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} |