/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2013 Tom Gundersen <teg@jklm.no> 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 <net/if.h> #include <netinet/ether.h> #include "sd-netlink.h" #include "ether-addr-util.h" #include "event-util.h" #include "macro.h" #include "missing.h" #include "netlink-util.h" #include "socket-util.h" #include "string-util.h" #include "util.h" static void test_message_link_bridge(sd_netlink *rtnl) { _cleanup_netlink_message_unref_ 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); } static void test_link_configure(sd_netlink *rtnl, int ifindex) { _cleanup_netlink_message_unref_ sd_netlink_message *message = NULL; const char *mac = "98:fe:94:3f:c6:18", *name = "test"; char buffer[ETHER_ADDR_TO_STRING_MAX]; unsigned int 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_link_get(sd_netlink *rtnl, int ifindex) { sd_netlink_message *m; sd_netlink_message *r; unsigned int 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_address_get(sd_netlink *rtnl, int ifindex) { sd_netlink_message *m; sd_netlink_message *r; struct in_addr in_data; struct ifa_cacheinfo cache; const char *label; assert_se(sd_rtnl_message_new_addr(rtnl, &m, RTM_GETADDR, ifindex, AF_INET) >= 0); assert_se(m); assert_se(sd_netlink_call(rtnl, m, -1, &r) == 1); assert_se(sd_netlink_message_read_in_addr(r, IFA_LOCAL, &in_data) == 0); assert_se(sd_netlink_message_read_in_addr(r, IFA_ADDRESS, &in_data) == 0); assert_se(sd_netlink_message_read_string(r, IFA_LABEL, &label) == 0); assert_se(sd_netlink_message_read_cache_info(r, IFA_CACHEINFO, &cache) == 0); assert_se((m = sd_netlink_message_unref(m)) == NULL); assert_se((r = sd_netlink_message_unref(r)) == NULL); } static void test_route(void) { _cleanup_netlink_message_unref_ sd_netlink_message *req; struct in_addr addr, addr_data; uint32_t index = 2, u32_data; int r; r = sd_rtnl_message_new_route(NULL, &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); } static void test_multiple(void) { sd_netlink *rtnl1, *rtnl2; assert_se(sd_netlink_open(&rtnl1) >= 0); assert_se(sd_netlink_open(&rtnl2) >= 0); rtnl1 = sd_netlink_unref(rtnl1); rtnl2 = sd_netlink_unref(rtnl2); } static int link_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { char *ifname = userdata; const char *data; assert_se(rtnl); assert_se(m); log_info("got link info about %s", ifname); free(ifname); assert_se(sd_netlink_message_read_string(m, IFLA_IFNAME, &data) >= 0); assert_se(streq(data, "lo")); return 1; } static void test_event_loop(int ifindex) { _cleanup_event_unref_ sd_event *event = NULL; _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; _cleanup_netlink_message_unref_ sd_netlink_message *m = NULL; char *ifname; ifname = strdup("lo2"); assert_se(ifname); assert_se(sd_netlink_open(&rtnl) >= 0); assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0); assert_se(sd_netlink_call_async(rtnl, m, &link_handler, ifname, 0, NULL) >= 0); assert_se(sd_event_default(&event) >= 0); assert_se(sd_netlink_attach_event(rtnl, event, 0) >= 0); assert_se(sd_event_run(event, 0) >= 0); assert_se(sd_netlink_detach_event(rtnl) >= 0); assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL); } static int pipe_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { int *counter = userdata; int r; (*counter) --; r = sd_netlink_message_get_errno(m); log_info_errno(r, "%d left in pipe. got reply: %m", *counter); assert_se(r >= 0); return 1; } static void test_async(int ifindex) { _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; _cleanup_netlink_message_unref_ sd_netlink_message *m = NULL, *r = NULL; uint32_t serial; char *ifname; ifname = strdup("lo"); assert_se(ifname); assert_se(sd_netlink_open(&rtnl) >= 0); assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0); assert_se(sd_netlink_call_async(rtnl, m, &link_handler, ifname, 0, &serial) >= 0); assert_se(sd_netlink_wait(rtnl, 0) >= 0); assert_se(sd_netlink_process(rtnl, &r) >= 0); assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL); } static void test_pipe(int ifindex) { _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; _cleanup_netlink_message_unref_ sd_netlink_message *m1 = NULL, *m2 = NULL; int counter = 0; assert_se(sd_netlink_open(&rtnl) >= 0); assert_se(sd_rtnl_message_new_link(rtnl, &m1, RTM_GETLINK, ifindex) >= 0); assert_se(sd_rtnl_message_new_link(rtnl, &m2, RTM_GETLINK, ifindex) >= 0); counter ++; assert_se(sd_netlink_call_async(rtnl, m1, &pipe_handler, &counter, 0, NULL) >= 0); counter ++; assert_se(sd_netlink_call_async(rtnl, m2, &pipe_handler, &counter, 0, NULL) >= 0); while (counter > 0) { assert_se(sd_netlink_wait(rtnl, 0) >= 0); assert_se(sd_netlink_process(rtnl, NULL) >= 0); } assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL); } static void test_container(void) { _cleanup_netlink_message_unref_ sd_netlink_message *m = NULL; uint16_t u16_data; uint32_t u32_data; const char *string_data; assert_se(sd_rtnl_message_new_link(NULL, &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_match(void) { _cleanup_netlink_unref_ sd_netlink *rtnl = NULL; assert_se(sd_netlink_open(&rtnl) >= 0); assert_se(sd_netlink_add_match(rtnl, RTM_NEWLINK, &link_handler, NULL) >= 0); assert_se(sd_netlink_add_match(rtnl, RTM_NEWLINK, &link_handler, NULL) >= 0); assert_se(sd_netlink_remove_match(rtnl, RTM_NEWLINK, &link_handler, NULL) == 1); assert_se(sd_netlink_remove_match(rtnl, RTM_NEWLINK, &link_handler, NULL) == 1); assert_se(sd_netlink_remove_match(rtnl, RTM_NEWLINK, &link_handler, NULL) == 0); assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL); } static void test_get_addresses(sd_netlink *rtnl) { _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL, *reply = NULL; sd_netlink_message *m; assert_se(sd_rtnl_message_new_addr(rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC) >= 0); assert_se(sd_netlink_call(rtnl, req, 0, &reply) >= 0); for (m = reply; m; m = sd_netlink_message_next(m)) { uint16_t type; unsigned char scope, flags; int family, ifindex; assert_se(sd_netlink_message_get_type(m, &type) >= 0); assert_se(type == RTM_NEWADDR); assert_se(sd_rtnl_message_addr_get_ifindex(m, &ifindex) >= 0); assert_se(sd_rtnl_message_addr_get_family(m, &family) >= 0); assert_se(sd_rtnl_message_addr_get_scope(m, &scope) >= 0); assert_se(sd_rtnl_message_addr_get_flags(m, &flags) >= 0); assert_se(ifindex > 0); assert_se(family == AF_INET || family == AF_INET6); log_info("got IPv%u address on ifindex %i", family == AF_INET ? 4: 6, ifindex); } } static void test_message(void) { _cleanup_netlink_message_unref_ sd_netlink_message *m = NULL; assert_se(rtnl_message_new_synthetic_error(-ETIMEDOUT, 1, &m) >= 0); assert_se(sd_netlink_message_get_errno(m) == -ETIMEDOUT); } int main(void) { sd_netlink *rtnl; sd_netlink_message *m; sd_netlink_message *r; const char *string_data; int if_loopback; uint16_t type; test_message(); test_match(); test_multiple(); test_route(); test_container(); assert_se(sd_netlink_open(&rtnl) >= 0); assert_se(rtnl); if_loopback = (int) if_nametoindex("lo"); assert_se(if_loopback > 0); test_async(if_loopback); test_pipe(if_loopback); test_event_loop(if_loopback); test_link_configure(rtnl, if_loopback); test_get_addresses(rtnl); test_message_link_bridge(rtnl); assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, if_loopback) >= 0); assert_se(m); assert_se(sd_netlink_message_get_type(m, &type) >= 0); assert_se(type == RTM_GETLINK); assert_se(sd_netlink_message_read_string(m, IFLA_IFNAME, &string_data) == -EPERM); assert_se(sd_netlink_call(rtnl, m, 0, &r) == 1); assert_se(sd_netlink_message_get_type(r, &type) >= 0); assert_se(type == RTM_NEWLINK); assert_se((r = sd_netlink_message_unref(r)) == NULL); assert_se(sd_netlink_call(rtnl, m, -1, &r) == -EPERM); assert_se((m = sd_netlink_message_unref(m)) == NULL); assert_se((r = sd_netlink_message_unref(r)) == NULL); test_link_get(rtnl, if_loopback); test_address_get(rtnl, if_loopback); assert_se((m = sd_netlink_message_unref(m)) == NULL); assert_se((r = sd_netlink_message_unref(r)) == NULL); assert_se((rtnl = sd_netlink_unref(rtnl)) == NULL); return EXIT_SUCCESS; }