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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "format-ifname.h"
#include "in-addr-util.h"
#include "local-addresses.h"
#include "networkctl-dump-util.h"
#include "stdio-util.h"
#include "strv.h"
int dump_list(Table *table, const char *key, char * const *l) {
int r;
assert(table);
assert(key);
if (strv_isempty(l))
return 0;
r = table_add_many(table,
TABLE_FIELD, key,
TABLE_STRV, l);
if (r < 0)
return table_log_add_error(r);
return 0;
}
/* IEEE Organizationally Unique Identifier vendor string */
int ieee_oui(sd_hwdb *hwdb, const struct ether_addr *mac, char **ret) {
_cleanup_free_ char *desc = NULL;
const char *description;
char modalias[STRLEN("OUI:XXYYXXYYXXYY") + 1];
int r;
assert(ret);
if (!hwdb || !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 = TAKE_PTR(desc);
return 0;
}
static int get_gateway_description(
sd_netlink *rtnl,
sd_hwdb *hwdb,
int ifindex,
int family,
union in_addr_union *gateway,
char **ret) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
int r;
assert(rtnl);
assert(ifindex >= 0);
assert(IN_SET(family, AF_INET, AF_INET6));
assert(gateway);
assert(ret);
r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_GETNEIGH, ifindex, family);
if (r < 0)
return r;
r = sd_netlink_message_set_request_dump(req, true);
if (r < 0)
return r;
r = sd_netlink_call(rtnl, req, 0, &reply);
if (r < 0)
return r;
for (sd_netlink_message *m = reply; m; m = sd_netlink_message_next(m)) {
union in_addr_union gw = IN_ADDR_NULL;
struct ether_addr mac = ETHER_ADDR_NULL;
uint16_t type;
int ifi, fam;
r = sd_netlink_message_get_errno(m);
if (r < 0) {
log_error_errno(r, "Failed to get netlink message, ignoring: %m");
continue;
}
r = sd_netlink_message_get_type(m, &type);
if (r < 0) {
log_error_errno(r, "Failed to get netlink message type, ignoring: %m");
continue;
}
if (type != RTM_NEWNEIGH) {
log_error("Got unexpected netlink message type %u, ignoring.", type);
continue;
}
r = sd_rtnl_message_neigh_get_family(m, &fam);
if (r < 0) {
log_error_errno(r, "Failed to get rtnl family, ignoring: %m");
continue;
}
if (fam != family) {
log_error("Got invalid rtnl family %d, ignoring.", fam);
continue;
}
r = sd_rtnl_message_neigh_get_ifindex(m, &ifi);
if (r < 0) {
log_error_errno(r, "Failed to get rtnl ifindex, ignoring: %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:
assert_not_reached();
}
if (!in_addr_equal(fam, &gw, gateway))
continue;
r = sd_netlink_message_read(m, NDA_LLADDR, sizeof(mac), &mac);
if (r < 0)
continue;
r = ieee_oui(hwdb, &mac, ret);
if (r < 0)
continue;
return 0;
}
return -ENODATA;
}
int dump_gateways(sd_netlink *rtnl, sd_hwdb *hwdb, Table *table, int ifindex) {
_cleanup_free_ struct local_address *local_addrs = NULL;
_cleanup_strv_free_ char **buf = NULL;
int r, n;
assert(rtnl);
assert(table);
n = local_gateways(rtnl, ifindex, AF_UNSPEC, &local_addrs);
if (n <= 0)
return n;
FOREACH_ARRAY(local, local_addrs, n) {
_cleanup_free_ char *description = NULL;
r = get_gateway_description(rtnl, hwdb, local->ifindex, local->family, &local->address, &description);
if (r < 0)
log_debug_errno(r, "Could not get description of gateway, ignoring: %m");
/* Show interface name for the entry if we show entries for all interfaces */
r = strv_extendf(&buf, "%s%s%s%s%s%s",
IN_ADDR_TO_STRING(local->family, &local->address),
description ? " (" : "",
strempty(description),
description ? ")" : "",
ifindex <= 0 ? " on " : "",
ifindex <= 0 ? FORMAT_IFNAME_FULL(local->ifindex, FORMAT_IFNAME_IFINDEX_WITH_PERCENT) : "");
if (r < 0)
return log_oom();
}
return dump_list(table, "Gateway", buf);
}
int dump_addresses(
sd_netlink *rtnl,
sd_dhcp_lease *lease,
Table *table,
int ifindex) {
_cleanup_free_ struct local_address *local_addrs = NULL;
_cleanup_strv_free_ char **buf = NULL;
struct in_addr dhcp4_address = {};
int r, n;
assert(rtnl);
assert(table);
n = local_addresses(rtnl, ifindex, AF_UNSPEC, &local_addrs);
if (n <= 0)
return n;
if (lease)
(void) sd_dhcp_lease_get_address(lease, &dhcp4_address);
FOREACH_ARRAY(local, local_addrs, n) {
struct in_addr server_address;
bool dhcp4 = false;
if (local->family == AF_INET && in4_addr_equal(&local->address.in, &dhcp4_address))
dhcp4 = sd_dhcp_lease_get_server_identifier(lease, &server_address) >= 0;
r = strv_extendf(&buf, "%s%s%s%s%s%s",
IN_ADDR_TO_STRING(local->family, &local->address),
dhcp4 ? " (DHCPv4 via " : "",
dhcp4 ? IN4_ADDR_TO_STRING(&server_address) : "",
dhcp4 ? ")" : "",
ifindex <= 0 ? " on " : "",
ifindex <= 0 ? FORMAT_IFNAME_FULL(local->ifindex, FORMAT_IFNAME_IFINDEX_WITH_PERCENT) : "");
if (r < 0)
return log_oom();
}
return dump_list(table, "Address", buf);
}
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