d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering#include <stdbool.h>

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering#include <getopt.h>

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering#include <net/if.h>

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering#include "sd-network.h"

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering#include "sd-rtnl.h"

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering#include "libudev.h"

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering#include "build.h"

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering#include "util.h"

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering#include "pager.h"

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering#include "rtnl-util.h"

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering#include "udev-util.h"

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering#include "arphrd-list.h"

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering#include "local-addresses.h"

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering#include "socket-util.h"

c75f27ea2b483f91d437ebaf8494457dc76f3fd6Lennart Poettering#include "ether-addr-util.h"

c75f27ea2b483f91d437ebaf8494457dc76f3fd6Lennart Poettering

c75f27ea2b483f91d437ebaf8494457dc76f3fd6Lennart Poetteringstatic bool arg_no_pager = false;

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poetteringstatic bool arg_legend = true;

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poetteringstatic bool arg_all = false;

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poetteringstatic void pager_open_if_enabled(void) {

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering

c75f27ea2b483f91d437ebaf8494457dc76f3fd6Lennart Poettering if (arg_no_pager)

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering return;

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering pager_open(false);

c75f27ea2b483f91d437ebaf8494457dc76f3fd6Lennart Poettering}

c75f27ea2b483f91d437ebaf8494457dc76f3fd6Lennart Poettering

c75f27ea2b483f91d437ebaf8494457dc76f3fd6Lennart Poetteringstatic int link_get_type_string(int iftype, struct udev_device *d, char **ret) {

c75f27ea2b483f91d437ebaf8494457dc76f3fd6Lennart Poettering const char *t;

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering char *p;

c75f27ea2b483f91d437ebaf8494457dc76f3fd6Lennart Poettering

10f9c75519671e7c7ab8993b54fe22da7c2d0c38Lennart Poettering if (iftype == ARPHRD_ETHER && d) {

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering const char *devtype, *id = NULL;

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering /* WLANs have iftype ARPHRD_ETHER, but we want

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering devtype = udev_device_get_devtype(d);

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering if (streq_ptr(devtype, "wlan"))

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering id = "wlan";

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering else if (streq_ptr(devtype, "wwan"))

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering id = "wwan";

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering if (id) {

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering p = strdup(id);

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering if (!p)

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering return -ENOMEM;

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering *ret = p;

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering return 1;

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering }

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering }

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering t = arphrd_to_name(iftype);

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering if (!t) {

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering *ret = NULL;

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering return 0;

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering }

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering p = strdup(t);

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering if (!p)

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering return -ENOMEM;

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering ascii_strlower(p);

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering *ret = p;

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering return 0;

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering}

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poetteringtypedef struct LinkInfo {

d7c7c334f56edab8cfc102b657366277a65738cfLennart Poettering 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 ieee_oui(struct udev_hwdb *hwdb, struct ether_addr *mac, char **ret) {

struct udev_list_entry *entry;

char *description;

char str[strlen("OUI:XXYYXXYYXXYY") + 1];

if (!hwdb)

return -EINVAL;

/* skip commonly misused 00:00:00 (Xerox) prefix */

if (memcmp(mac, "\0\0\0", 3) == 0)

return -EINVAL;

snprintf(str, sizeof(str), "OUI:" ETHER_ADDR_FORMAT_STR, ETHER_ADDR_FORMAT_VAL(*mac));

udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, str, 0))

if (strcmp(udev_list_entry_get_name(entry), "ID_OUI_FROM_DATABASE") == 0) {

description = strdup(udev_list_entry_get_value(entry));

if (!description)

return -ENOMEM;

*ret = description;

return 0;

}

return -ENODATA;

}

static int get_gateway_description(

sd_rtnl *rtnl,

struct udev_hwdb *hwdb,

int ifindex,

int family,

union in_addr_union *gateway,

char **gateway_description) {

_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;

sd_rtnl_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_rtnl_message_request_dump(req, true);

if (r < 0)

return r;

r = sd_rtnl_call(rtnl, req, 0, &reply);

if (r < 0)

return r;

for (m = reply; m; m = sd_rtnl_message_next(m)) {

union in_addr_union gw = {};

struct ether_addr mac = {};

uint16_t type;

int ifi, fam;

r = sd_rtnl_message_get_errno(m);

if (r < 0) {

log_error_errno(r, "got error: %m");

continue;

}

r = sd_rtnl_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_rtnl_message_read_in_addr(m, NDA_DST, &gw.in);

if (r < 0)

continue;

break;

case AF_INET6:

r = sd_rtnl_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_rtnl_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_rtnl *rtnl,

struct udev_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

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_rtnl *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;

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,

struct udev_hwdb *hwdb,

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);

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");

}

link_get_type_string(iftype, d, &t);

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) {

_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);

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_hwdb_unref_ struct udev_hwdb *hwdb = NULL;

_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");

hwdb = udev_hwdb_new(udev);

if (!hwdb)

log_debug_errno(errno, "Failed to open hardware database: %m");

if (n <= 1 && !arg_all) {

_cleanup_free_ char *operational_state = NULL;

_cleanup_strv_free_ char **dns = NULL, **ntp = NULL, **domains = NULL;

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);

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, hwdb, links[i].name);

}

} else {

STRV_FOREACH(name, args + 1) {

if (name != args+1)

fputc('\n', stdout);

link_status_one(rtnl, udev, hwdb, *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;

}