static void test_link_configure(sd_netlink *rtnl, int ifindex) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
const char *mac = "98:fe:94:3f:c6:18", *name = "test";
char buffer[ETHER_ADDR_TO_STRING_MAX];
uint32_t mtu = 1450, mtu_out;
const char *name_out;
struct ether_addr mac_out;
/* we'd really like to test NEWLINK, but let's not mess with the running kernel */
assert_se(sd_rtnl_message_new_link(rtnl, &message, RTM_GETLINK, ifindex) >= 0);
assert_se(sd_netlink_message_append_string(message, IFLA_IFNAME, name) >= 0);
assert_se(sd_netlink_message_append_ether_addr(message, IFLA_ADDRESS, ether_aton(mac)) >= 0);
assert_se(sd_netlink_message_append_u32(message, IFLA_MTU, mtu) >= 0);
assert_se(sd_netlink_call(rtnl, message, 0, NULL) == 1);
assert_se(sd_netlink_message_rewind(message) >= 0);
assert_se(sd_netlink_message_read_string(message, IFLA_IFNAME, &name_out) >= 0);
assert_se(streq(name, name_out));
assert_se(sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &mac_out) >= 0);
assert_se(streq(mac, ether_addr_to_string(&mac_out, buffer)));
assert_se(sd_netlink_message_read_u32(message, IFLA_MTU, &mtu_out) >= 0);
assert_se(mtu == mtu_out);
}
static void test_container(sd_netlink *rtnl) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
uint16_t u16_data;
uint32_t u32_data;
const char *string_data;
assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_NEWLINK, 0) >= 0);
assert_se(sd_netlink_message_open_container(m, IFLA_LINKINFO) >= 0);
assert_se(sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "vlan") >= 0);
assert_se(sd_netlink_message_append_u16(m, IFLA_VLAN_ID, 100) >= 0);
assert_se(sd_netlink_message_close_container(m) >= 0);
assert_se(sd_netlink_message_append_string(m, IFLA_INFO_KIND, "vlan") >= 0);
assert_se(sd_netlink_message_close_container(m) >= 0);
assert_se(sd_netlink_message_close_container(m) == -EINVAL);
assert_se(sd_netlink_message_rewind(m) >= 0);
assert_se(sd_netlink_message_enter_container(m, IFLA_LINKINFO) >= 0);
assert_se(sd_netlink_message_read_string(m, IFLA_INFO_KIND, &string_data) >= 0);
assert_se(streq("vlan", string_data));
assert_se(sd_netlink_message_enter_container(m, IFLA_INFO_DATA) >= 0);
assert_se(sd_netlink_message_read_u16(m, IFLA_VLAN_ID, &u16_data) >= 0);
assert_se(sd_netlink_message_exit_container(m) >= 0);
assert_se(sd_netlink_message_read_string(m, IFLA_INFO_KIND, &string_data) >= 0);
assert_se(streq("vlan", string_data));
assert_se(sd_netlink_message_exit_container(m) >= 0);
assert_se(sd_netlink_message_read_u32(m, IFLA_LINKINFO, &u32_data) < 0);
assert_se(sd_netlink_message_exit_container(m) == -EINVAL);
}
static void test_link_get(sd_netlink *rtnl, int ifindex) {
sd_netlink_message *m;
sd_netlink_message *r;
uint32_t mtu = 1500;
const char *str_data;
uint8_t u8_data;
uint32_t u32_data;
struct ether_addr eth_data;
assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
assert_se(m);
/* u8 test cases */
assert_se(sd_netlink_message_append_u8(m, IFLA_CARRIER, 0) >= 0);
assert_se(sd_netlink_message_append_u8(m, IFLA_OPERSTATE, 0) >= 0);
assert_se(sd_netlink_message_append_u8(m, IFLA_LINKMODE, 0) >= 0);
/* u32 test cases */
assert_se(sd_netlink_message_append_u32(m, IFLA_MTU, mtu) >= 0);
assert_se(sd_netlink_message_append_u32(m, IFLA_GROUP, 0) >= 0);
assert_se(sd_netlink_message_append_u32(m, IFLA_TXQLEN, 0) >= 0);
assert_se(sd_netlink_message_append_u32(m, IFLA_NUM_TX_QUEUES, 0) >= 0);
assert_se(sd_netlink_message_append_u32(m, IFLA_NUM_RX_QUEUES, 0) >= 0);
assert_se(sd_netlink_call(rtnl, m, -1, &r) == 1);
assert_se(sd_netlink_message_read_string(r, IFLA_IFNAME, &str_data) == 0);
assert_se(sd_netlink_message_read_u8(r, IFLA_CARRIER, &u8_data) == 0);
assert_se(sd_netlink_message_read_u8(r, IFLA_OPERSTATE, &u8_data) == 0);
assert_se(sd_netlink_message_read_u8(r, IFLA_LINKMODE, &u8_data) == 0);
assert_se(sd_netlink_message_read_u32(r, IFLA_MTU, &u32_data) == 0);
assert_se(sd_netlink_message_read_u32(r, IFLA_GROUP, &u32_data) == 0);
assert_se(sd_netlink_message_read_u32(r, IFLA_TXQLEN, &u32_data) == 0);
assert_se(sd_netlink_message_read_u32(r, IFLA_NUM_TX_QUEUES, &u32_data) == 0);
assert_se(sd_netlink_message_read_u32(r, IFLA_NUM_RX_QUEUES, &u32_data) == 0);
assert_se(sd_netlink_message_read_ether_addr(r, IFLA_ADDRESS, ð_data) == 0);
assert_se((m = sd_netlink_message_unref(m)) == NULL);
assert_se((r = sd_netlink_message_unref(r)) == NULL);
}
static void test_message_link_bridge(sd_netlink *rtnl) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
uint32_t cost;
assert_se(sd_rtnl_message_new_link(rtnl, &message, RTM_NEWLINK, 1) >= 0);
assert_se(sd_rtnl_message_link_set_family(message, PF_BRIDGE) >= 0);
assert_se(sd_netlink_message_open_container(message, IFLA_PROTINFO) >= 0);
assert_se(sd_netlink_message_append_u32(message, IFLA_BRPORT_COST, 10) >= 0);
assert_se(sd_netlink_message_close_container(message) >= 0);
assert_se(sd_netlink_message_rewind(message) >= 0);
assert_se(sd_netlink_message_enter_container(message, IFLA_PROTINFO) >= 0);
assert_se(sd_netlink_message_read_u32(message, IFLA_BRPORT_COST, &cost) >= 0);
assert_se(cost == 10);
assert_se(sd_netlink_message_exit_container(message) >= 0);
}
int link_update_rtnl(Link *l, sd_netlink_message *m) {
const char *n = NULL;
int r;
assert(l);
assert(m);
r = sd_rtnl_message_link_get_flags(m, &l->flags);
if (r < 0)
return r;
sd_netlink_message_read_u32(m, IFLA_MTU, &l->mtu);
if (sd_netlink_message_read_string(m, IFLA_IFNAME, &n) >= 0) {
strncpy(l->name, n, sizeof(l->name)-1);
char_array_0(l->name);
}
link_allocate_scopes(l);
link_add_rrs(l, false);
return 0;
}
static void test_route(sd_netlink *rtnl) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req;
struct in_addr addr, addr_data;
uint32_t index = 2, u32_data;
int r;
r = sd_rtnl_message_new_route(rtnl, &req, RTM_NEWROUTE, AF_INET, RTPROT_STATIC);
if (r < 0) {
log_error_errno(r, "Could not create RTM_NEWROUTE message: %m");
return;
}
addr.s_addr = htonl(INADDR_LOOPBACK);
r = sd_netlink_message_append_in_addr(req, RTA_GATEWAY, &addr);
if (r < 0) {
log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
return;
}
r = sd_netlink_message_append_u32(req, RTA_OIF, index);
if (r < 0) {
log_error_errno(r, "Could not append RTA_OIF attribute: %m");
return;
}
assert_se(sd_netlink_message_rewind(req) >= 0);
assert_se(sd_netlink_message_read_in_addr(req, RTA_GATEWAY, &addr_data) >= 0);
assert_se(addr_data.s_addr == addr.s_addr);
assert_se(sd_netlink_message_read_u32(req, RTA_OIF, &u32_data) >= 0);
assert_se(u32_data == index);
assert_se((req = sd_netlink_message_unref(req)) == NULL);
}
int local_gateways(sd_netlink *context, int ifindex, int af, struct local_address **ret) {
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
_cleanup_free_ struct local_address *list = NULL;
sd_netlink_message *m = NULL;
size_t n_list = 0, n_allocated = 0;
int r;
assert(ret);
if (context)
rtnl = sd_netlink_ref(context);
else {
r = sd_netlink_open(&rtnl);
if (r < 0)
return r;
}
r = sd_rtnl_message_new_route(rtnl, &req, RTM_GETROUTE, af, RTPROT_UNSPEC);
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)) {
struct local_address *a;
uint16_t type;
unsigned char dst_len, src_len;
uint32_t ifi;
int family;
r = sd_netlink_message_get_errno(m);
if (r < 0)
return r;
r = sd_netlink_message_get_type(m, &type);
if (r < 0)
return r;
if (type != RTM_NEWROUTE)
continue;
/* We only care for default routes */
r = sd_rtnl_message_route_get_dst_prefixlen(m, &dst_len);
if (r < 0)
return r;
if (dst_len != 0)
continue;
r = sd_rtnl_message_route_get_src_prefixlen(m, &src_len);
if (r < 0)
return r;
if (src_len != 0)
continue;
r = sd_netlink_message_read_u32(m, RTA_OIF, &ifi);
if (r == -ENODATA) /* Not all routes have an RTA_OIF attribute (for example nexthop ones) */
continue;
if (r < 0)
return r;
if (ifindex > 0 && (int) ifi != ifindex)
continue;
r = sd_rtnl_message_route_get_family(m, &family);
if (r < 0)
return r;
if (af != AF_UNSPEC && af != family)
continue;
if (!GREEDY_REALLOC0(list, n_allocated, n_list + 1))
return -ENOMEM;
a = list + n_list;
switch (family) {
case AF_INET:
r = sd_netlink_message_read_in_addr(m, RTA_GATEWAY, &a->address.in);
if (r < 0)
continue;
break;
case AF_INET6:
r = sd_netlink_message_read_in6_addr(m, RTA_GATEWAY, &a->address.in6);
if (r < 0)
continue;
break;
default:
continue;
}
sd_netlink_message_read_u32(m, RTA_PRIORITY, &a->metric);
a->ifindex = ifi;
a->family = family;
n_list++;
}
if (n_list > 0)
qsort(list, n_list, sizeof(struct local_address), address_compare);
*ret = TAKE_PTR(list);
return (int) n_list;
}
