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Systemd/src/network/networkctl.c

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/*-*- 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 <getopt.h>
#include <net/if.h>
#include <stdbool.h>
#include "sd-device.h"
#include "sd-hwdb.h"
#include "sd-netlink.h"
#include "sd-network.h"
#include "alloc-util.h"
#include "arphrd-list.h"
#include "device-util.h"
#include "ether-addr-util.h"
#include "hwdb-util.h"
#include "lldp.h"
#include "local-addresses.h"
#include "locale-util.h"
#include "netlink-util.h"
#include "pager.h"
#include "parse-util.h"
#include "socket-util.h"
#include "stdio-util.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
#include "terminal-util.h"
#include "util.h"
#include "verbs.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, 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;
}
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_netlink_message *m, LinkInfo **ret) {
_cleanup_free_ LinkInfo *links = NULL;
size_t size = 0, c = 0;
sd_netlink_message *i;
int r;
for (i = m; i; i = sd_netlink_message_next(i)) {
const char *name;
unsigned iftype;
uint16_t type;
int ifindex;
r = sd_netlink_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_netlink_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_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 (streq_ptr(state, "failed") || streq_ptr(state, "linger")) {
*on = ansi_highlight_red();
*off = ansi_normal();
} else
*on = *off = "";
}
static int list_links(int argc, char *argv[], void *userdata) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
_cleanup_free_ LinkInfo *links = NULL;
int r, c, i;
pager_open_if_enabled();
r = sd_netlink_open(&rtnl);
if (r < 0)
return log_error_errno(r, "Failed to connect to netlink: %m");
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");
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_(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;
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);
(void)sd_device_new_from_device_id(&d, 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;
}
/* IEEE Organizationally Unique Identifier vendor string */
static int ieee_oui(sd_hwdb *hwdb, 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;
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;
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 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 char *name) {
_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_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = 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_strv_free_ char **carrier_bound_to = NULL;
_cleanup_strv_free_ char **carrier_bound_by = NULL;
struct ether_addr e;
unsigned iftype;
int r, ifindex;
bool have_mac;
uint32_t mtu;
assert(rtnl);
assert(name);
if (parse_ifindex(name, &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, name);
}
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 query link: %m");
r = sd_rtnl_message_link_get_ifindex(reply, &ifindex);
if (r < 0)
return rtnl_log_parse_error(r);
r = sd_netlink_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_netlink_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;
}
(void) sd_netlink_message_read_u32(reply, IFLA_MTU, &mtu);
(void) sd_network_link_get_operational_state(ifindex, &operational_state);
operational_state_to_color(operational_state, &on_color_operational, &off_color_operational);
(void) sd_network_link_get_setup_state(ifindex, &setup_state);
setup_state_to_color(setup_state, &on_color_setup, &off_color_setup);
(void) sd_network_link_get_dns(ifindex, &dns);
(void) sd_network_link_get_search_domains(ifindex, &search_domains);
(void) sd_network_link_get_route_domains(ifindex, &route_domains);
(void) sd_network_link_get_ntp(ifindex, &ntp);
sprintf(devid, "n%i", 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);
}
link_get_type_string(iftype, d, &t);
sd_network_link_get_network_file(ifindex, &network);
sd_network_link_get_carrier_bound_to(ifindex, &carrier_bound_to);
sd_network_link_get_carrier_bound_by(ifindex, &carrier_bound_by);
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) {
_cleanup_free_ char *description = NULL;
char ea[ETHER_ADDR_TO_STRING_MAX];
ieee_oui(hwdb, &e, &description);
if (description)
printf(" HW Address: %s (%s)\n", ether_addr_to_string(&e, ea), description);
else
printf(" HW Address: %s\n", ether_addr_to_string(&e, ea));
}
if (mtu > 0)
printf(" MTU: %u\n", mtu);
dump_addresses(rtnl, " Address: ", ifindex);
dump_gateways(rtnl, hwdb, " Gateway: ", ifindex);
dump_list(" DNS: ", dns);
dump_list(" Search Domains: ", search_domains);
dump_list(" Route Domains: ", route_domains);
dump_list(" NTP: ", ntp);
dump_list("Carrier Bound To: ", carrier_bound_to);
dump_list("Carrier Bound By: ", carrier_bound_by);
(void) sd_network_link_get_timezone(ifindex, &tz);
if (tz)
printf(" Time Zone: %s", tz);
return 0;
}
static int link_status(int argc, char *argv[], void *userdata) {
_cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb = NULL;
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
char **name;
int r;
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 (argc <= 1 && !arg_all) {
_cleanup_free_ char *operational_state = NULL;
_cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **search_domains = NULL, **route_domains;
const char *on_color_operational, *off_color_operational;
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, draw_special_char(DRAW_BLACK_CIRCLE), off_color_operational,
on_color_operational, strna(operational_state), off_color_operational);
dump_addresses(rtnl, " Address: ", 0);
dump_gateways(rtnl, hwdb, " Gateway: ", 0);
sd_network_get_dns(&dns);
dump_list(" DNS: ", dns);
sd_network_get_search_domains(&search_domains);
dump_list("Search Domains: ", search_domains);
sd_network_get_route_domains(&route_domains);
dump_list(" Route Domains: ", route_domains);
sd_network_get_ntp(&ntp);
dump_list(" NTP: ", ntp);
return 0;
}
pager_open_if_enabled();
if (arg_all) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_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_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");
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, hwdb, links[i].name);
}
} else {
STRV_FOREACH(name, argv + 1) {
if (name != argv + 1)
fputc('\n', stdout);
link_status_one(rtnl, hwdb, *name);
}
}
return 0;
}
const char *lldp_system_capability_to_string(LLDPSystemCapabilities d) _const_;
LLDPSystemCapabilities lldp_system_capability_from_string(const char *d) _pure_;
static const char* const lldp_system_capability_table[_LLDP_SYSTEM_CAPABILITIES_MAX + 1] = {
[LLDP_SYSTEM_CAPABILITIES_OTHER] = "O",
[LLDP_SYSTEM_CAPABILITIES_REPEATER] = "P",
[LLDP_SYSTEM_CAPABILITIES_BRIDGE] = "B",
[LLDP_SYSTEM_CAPABILITIES_WLAN_AP] = "W",
[LLDP_SYSTEM_CAPABILITIES_ROUTER] = "R",
[LLDP_SYSTEM_CAPABILITIES_PHONE] = "T",
[LLDP_SYSTEM_CAPABILITIES_DOCSIS] = "D",
[LLDP_SYSTEM_CAPABILITIES_STATION] = "A",
[LLDP_SYSTEM_CAPABILITIES_CVLAN] = "C",
[LLDP_SYSTEM_CAPABILITIES_SVLAN] = "S",
[LLDP_SYSTEM_CAPABILITIES_TPMR] = "M",
[_LLDP_SYSTEM_CAPABILITIES_MAX] = "N/A",
};
DEFINE_STRING_TABLE_LOOKUP(lldp_system_capability, LLDPSystemCapabilities);
static char *lldp_system_caps(uint16_t cap) {
_cleanup_free_ char *s = NULL, *t = NULL;
char *capability;
t = strdup("[ ");
if (!t)
return NULL;
if (cap & LLDP_SYSTEM_CAPABILITIES_OTHER) {
s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_OTHER), " ", NULL);
if (!s)
return NULL;
free(t);
t = s;
}
if (cap & LLDP_SYSTEM_CAPABILITIES_REPEATER) {
s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_REPEATER), " ", NULL);
if (!s)
return NULL;
free(t);
t = s;
}
if (cap & LLDP_SYSTEM_CAPABILITIES_BRIDGE) {
s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_BRIDGE), " ", NULL);
if (!s)
return NULL;
free(t);
t = s;
}
if (cap & LLDP_SYSTEM_CAPABILITIES_WLAN_AP) {
s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_WLAN_AP), " ", NULL);
if (!s)
return NULL;
free(t);
t = s;
}
if (cap & LLDP_SYSTEM_CAPABILITIES_ROUTER) {
s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_ROUTER), " ", NULL);
if (!s)
return NULL;
free(t);
t = s;
}
if (cap & LLDP_SYSTEM_CAPABILITIES_PHONE) {
s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_PHONE), " ", NULL);
if (!s)
return NULL;
free(t);
t = s;
}
if (cap & LLDP_SYSTEM_CAPABILITIES_DOCSIS) {
s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_DOCSIS), " ", NULL);
if (!s)
return NULL;
free(t);
t = s;
}
if (cap & LLDP_SYSTEM_CAPABILITIES_STATION) {
s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_STATION), " ", NULL);
if (!s)
return NULL;
free(t);
t = s;
}
if (cap & LLDP_SYSTEM_CAPABILITIES_CVLAN) {
s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_CVLAN), " ", NULL);
if (!s)
return NULL;
free(t);
t = s;
}
if (cap & LLDP_SYSTEM_CAPABILITIES_SVLAN) {
s = strjoin(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_SVLAN), " ", NULL);
if (!s)
return NULL;
free(t);
t = s;
}
if (cap & LLDP_SYSTEM_CAPABILITIES_TPMR) {
s = strappend(t, lldp_system_capability_to_string(LLDP_SYSTEM_CAPABILITIES_TPMR));
if (!s)
return NULL;
free(t);
}
if (!s) {
s = strappend(t, lldp_system_capability_to_string(_LLDP_SYSTEM_CAPABILITIES_MAX));
if (!s)
return NULL;
free(t);
}
t = strappend(s, "]");
if (!t)
return NULL;
free(s);
capability = t;
s = NULL;
t = NULL;
return capability;
}
static int link_lldp_status(int argc, char *argv[], void *userdata) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
_cleanup_free_ LinkInfo *links = NULL;
double ttl = -1;
uint32_t capability;
int i, r, c, j;
const char *p;
char **s;
pager_open_if_enabled();
r = sd_netlink_open(&rtnl);
if (r < 0)
return log_error_errno(r, "Failed to connect to netlink: %m");
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");
c = decode_and_sort_links(reply, &links);
if (c < 0)
return rtnl_log_parse_error(c);
if (arg_legend)
printf("%s %16s %24s %16s %16s\n", "Local Intf", "Device ID", "Port ID", "TTL", "Capability");
for (i = j = 0; i < c; i++) {
_cleanup_free_ char *chassis = NULL, *port = NULL, *cap = NULL, *lldp = NULL;
_cleanup_strv_free_ char **l = NULL;
r = sd_network_link_get_lldp(links[i].ifindex, &lldp);
if (r < 0)
continue;
l = strv_split_newlines(lldp);
if (!l)
return -ENOMEM;
STRV_FOREACH(s, l) {
p = *s;
for (;;) {
_cleanup_free_ char *a = NULL, *b = NULL, *word = NULL;
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES);
if (r < 0)
return log_error_errno(r, "Failed to parse LLDP syntax \"%s\": %m", *s);
if (r == 0)
break;
r = split_pair(word, "=", &a, &b);
if (r < 0)
continue;
if (streq(a, "_Chassis")) {
r = free_and_strdup(&chassis, b);
if (r < 0)
return r;
} else if (streq(a, "_Port")) {
r = free_and_strdup(&port, b);
if (r < 0)
return r;
} else if (streq(a, "_TTL")) {
long long unsigned x = 0;
usec_t time;
r = safe_atollu(b, &x);
if (r < 0 || (usec_t) x != x)
return log_warning_errno(r < 0 ? r : ERANGE,
"Failed to parse TTL \"%s\": %m", b);
time = now(clock_boottime_or_monotonic());
if (x < time)
continue;
ttl = (double) (x - time) / USEC_PER_SEC;
} else if (streq(a, "_CAP")) {
sscanf(b, "%x", &capability);
cap = lldp_system_caps(capability);
}
}
if (ttl >= 0) {
printf("%10s %24s %16s %16f %16s\n",
links[i].name,
strna(chassis), strna(port),
ttl, cap);
j++;
}
}
}
if (arg_legend) {
printf("\nCapability Codes:\n"
"(O) - Other, (P) - Repeater, (B) - Bridge , (W) - WLAN Access Point, (R) = Router,\n"
"(T) - Telephone, (D) - Data Over Cable Service Interface Specifications, (A) - Station,\n"
"(C) - Customer VLAN, (S) - Service VLAN, (M) - Two-port MAC Relay (TPMR)\n\n");
printf("Total entries displayed: %d\n", j);
}
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"
" lldp Show lldp information\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, 1, VERB_DEFAULT, list_links },
{ "status", 1, VERB_ANY, 0, link_status },
{ "lldp", VERB_ANY, 1, VERB_DEFAULT, link_lldp_status },
{}
};
return dispatch_verb(argc, argv, verbs, NULL);
}
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;
}
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