src/libsystemd-rtnl/test-rtnl.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Tom Gundersen <teg@jklm.no>
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <linux/rtnetlink.h>
  23 #include <netinet/ether.h>
  24
  25 #include "util.h"
  26 #include "macro.h"
  27 #include "sd-rtnl.h"
  28 #include "socket-util.h"
  29 #include "rtnl-util.h"
  30 #include "event-util.h"
  31
  32 static void test_link_configure(sd_rtnl *rtnl, int ifindex) {
  33         _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *message;
  34         uint16_t type;
  35         const char *mac = "98:fe:94:3f:c6:18", *name = "test";
  36         unsigned int mtu = 1450;
  37         void *data;
  38
  39         /* we'd really like to test NEWLINK, but let's not mess with the running kernel */
  40         assert(sd_rtnl_message_link_new(RTM_GETLINK, ifindex, &message) >= 0);
  41         assert(sd_rtnl_message_append_string(message, IFLA_IFNAME, name) >= 0);
  42         assert(sd_rtnl_message_append_ether_addr(message, IFLA_ADDRESS, ether_aton(mac)) >= 0);
  43         assert(sd_rtnl_message_append_u32(message, IFLA_MTU, mtu) >= 0);
  44
  45         assert(sd_rtnl_message_read(message, &type, &data) > 0);
  46         assert(type == IFLA_IFNAME);
  47         assert(streq(name, (char *) data));
  48
  49         assert(sd_rtnl_message_read(message, &type, &data) > 0);
  50         assert(type == IFLA_ADDRESS);
  51         assert(streq(mac, ether_ntoa(data)));
  52
  53         assert(sd_rtnl_message_read(message, &type, &data) > 0);
  54         assert(type == IFLA_MTU);
  55         assert(mtu == *(unsigned int *) data);
  56
  57         assert(sd_rtnl_call(rtnl, message, 0, NULL) == 1);
  58 }
  59
  60 static void test_route(void) {
  61         _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req;
  62         struct in_addr addr;
  63         uint32_t index = 2;
  64         uint16_t type;
  65         void *data;
  66         int r;
  67
  68         r = sd_rtnl_message_route_new(RTM_NEWROUTE, AF_INET, &req);
  69         if (r < 0) {
  70                 log_error("Could not create RTM_NEWROUTE message: %s", strerror(-r));
  71                 return;
  72         }
  73
  74         addr.s_addr = htonl(INADDR_LOOPBACK);
  75
  76         r = sd_rtnl_message_append_in_addr(req, RTA_GATEWAY, &addr);
  77         if (r < 0) {
  78                 log_error("Could not append RTA_GATEWAY attribute: %s", strerror(-r));
  79                 return;
  80         }
  81
  82         r = sd_rtnl_message_append_u32(req, RTA_OIF, index);
  83         if (r < 0) {
  84                 log_error("Could not append RTA_OIF attribute: %s", strerror(-r));
  85                 return;
  86         }
  87
  88         assert(sd_rtnl_message_read(req, &type, &data) > 0);
  89         assert(type == RTA_GATEWAY);
  90         assert(((struct in_addr *)data)->s_addr == addr.s_addr);
  91
  92         assert(sd_rtnl_message_read(req, &type, &data) > 0);
  93         assert(type == RTA_OIF);
  94         assert(*(uint32_t *) data == index);
  95 }
  96
  97 static void test_multiple(void) {
  98         sd_rtnl *rtnl1, *rtnl2;
  99
 100         assert(sd_rtnl_open(0, &rtnl1) >= 0);
 101         assert(sd_rtnl_open(0, &rtnl2) >= 0);
 102
 103         rtnl1 = sd_rtnl_unref(rtnl1);
 104         rtnl2 = sd_rtnl_unref(rtnl2);
 105 }
 106
 107 static int link_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 108         void *data;
 109         uint16_t type;
 110         char *ifname = userdata;
 111
 112         assert(rtnl);
 113         assert(m);
 114
 115         log_info("got link info about %s", ifname);
 116         free(ifname);
 117
 118         while (sd_rtnl_message_read(m, &type, &data) > 0) {
 119                 switch (type) {
 120 //                        case IFLA_MTU:
 121 //                                assert(*(unsigned int *) data == 65536);
 122 //                                break;
 123 //                        case IFLA_QDISC:
 124 //                                assert(streq((char *) data, "noqueue"));
 125 //                                break;
 126                         case IFLA_IFNAME:
 127                                 assert(streq((char *) data, "lo"));
 128                                 break;
 129                 }
 130         }
 131
 132         return 1;
 133 }
 134
 135 static void test_event_loop(int ifindex) {
 136         _cleanup_event_unref_ sd_event *event = NULL;
 137         _cleanup_sd_rtnl_unref_ sd_rtnl *rtnl = NULL;
 138         _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *m = NULL;
 139         char *ifname;
 140
 141         ifname = strdup("lo2");
 142         assert(ifname);
 143
 144         assert(sd_rtnl_open(0, &rtnl) >= 0);
 145         assert(sd_rtnl_message_link_new(RTM_GETLINK, ifindex, &m) >= 0);
 146
 147         assert(sd_rtnl_call_async(rtnl, m, &link_handler, ifname, 0, NULL) >= 0);
 148
 149         assert(sd_event_default(&event) >= 0);
 150
 151         assert(sd_rtnl_attach_event(rtnl, event, 0) >= 0);
 152
 153         assert(sd_event_run(event, 0) >= 0);
 154
 155         assert(sd_rtnl_detach_event(rtnl) >= 0);
 156 }
 157
 158 static int pipe_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
 159         int *counter = userdata;
 160
 161         (*counter) --;
 162
 163         log_info("got reply, %d left in pipe", *counter);
 164
 165         return sd_rtnl_message_get_errno(m);
 166 }
 167
 168 static void test_async(int ifindex) {
 169         _cleanup_sd_rtnl_unref_ sd_rtnl *rtnl = NULL;
 170         _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *m = NULL, *r = NULL;
 171         uint32_t serial;
 172         char *ifname;
 173
 174         ifname = strdup("lo");
 175         assert(ifname);
 176
 177         assert(sd_rtnl_open(0, &rtnl) >= 0);
 178
 179         assert(sd_rtnl_message_link_new(RTM_GETLINK, ifindex, &m) >= 0);
 180
 181         assert(sd_rtnl_call_async(rtnl, m, &link_handler, ifname, 0, &serial) >= 0);
 182
 183         assert(sd_rtnl_wait(rtnl, 0) >= 0);
 184         assert(sd_rtnl_process(rtnl, &r) >= 0);
 185 }
 186
 187 static void test_pipe(int ifindex) {
 188         _cleanup_sd_rtnl_unref_ sd_rtnl *rtnl = NULL;
 189         _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *m1 = NULL, *m2 = NULL;
 190         int counter = 0;
 191
 192         assert(sd_rtnl_open(0, &rtnl) >= 0);
 193
 194         assert(sd_rtnl_message_link_new(RTM_GETLINK, ifindex, &m1) >= 0);
 195         assert(sd_rtnl_message_link_new(RTM_GETLINK, ifindex, &m2) >= 0);
 196
 197         counter ++;
 198         assert(sd_rtnl_call_async(rtnl, m1, &pipe_handler, &counter, 0, NULL) >= 0);
 199
 200         counter ++;
 201         assert(sd_rtnl_call_async(rtnl, m2, &pipe_handler, &counter, 0, NULL) >= 0);
 202
 203         while (counter > 0) {
 204                 assert(sd_rtnl_wait(rtnl, 0) >= 0);
 205                 assert(sd_rtnl_process(rtnl, NULL) >= 0);
 206         }
 207 }
 208
 209 static void test_container(void) {
 210         _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *m = NULL;
 211         uint16_t type;
 212         void *data;
 213
 214         assert(sd_rtnl_message_link_new(RTM_NEWLINK, 0, &m) >= 0);
 215
 216         assert(sd_rtnl_message_open_container(m, IFLA_LINKINFO) >= 0);
 217         assert(sd_rtnl_message_open_container(m, IFLA_LINKINFO) == -EINVAL);
 218         assert(sd_rtnl_message_append_string(m, IFLA_INFO_KIND, "kind") >= 0);
 219         assert(sd_rtnl_message_close_container(m) >= 0);
 220         assert(sd_rtnl_message_close_container(m) == -EINVAL);
 221
 222         assert(sd_rtnl_message_read(m, &type, &data) == -EINVAL);
 223
 224 /* TODO: add support for entering containers
 225         assert(sd_rtnl_message_read(m, &type, &data) > 0);
 226         assert(type == IFLA_INFO_KIND);
 227         assert(streq("kind", (char *) data));
 228
 229         assert(sd_rtnl_message_read(m, &type, &data) == 0);
 230 */
 231 }
 232
 233 static void test_match(void) {
 234         _cleanup_sd_rtnl_unref_ sd_rtnl *rtnl = NULL;
 235
 236         assert(sd_rtnl_open(0, &rtnl) >= 0);
 237
 238         assert(sd_rtnl_add_match(rtnl, RTM_NEWLINK, &link_handler, NULL) >= 0);
 239         assert(sd_rtnl_add_match(rtnl, RTM_NEWLINK, &link_handler, NULL) >= 0);
 240
 241         assert(sd_rtnl_remove_match(rtnl, RTM_NEWLINK, &link_handler, NULL) == 1);
 242         assert(sd_rtnl_remove_match(rtnl, RTM_NEWLINK, &link_handler, NULL) == 1);
 243         assert(sd_rtnl_remove_match(rtnl, RTM_NEWLINK, &link_handler, NULL) == 0);
 244 }
 245
 246 int main(void) {
 247         sd_rtnl *rtnl;
 248         sd_rtnl_message *m;
 249         sd_rtnl_message *r;
 250         void *data;
 251         int if_loopback;
 252         uint16_t type;
 253         unsigned int mtu = 0;
 254         unsigned int *mtu_reply;
 255
 256         test_match();
 257
 258         test_multiple();
 259
 260         test_route();
 261
 262         test_container();
 263
 264         assert(sd_rtnl_open(0, &rtnl) >= 0);
 265         assert(rtnl);
 266
 267         if_loopback = (int) if_nametoindex("lo");
 268         assert(if_loopback > 0);
 269
 270         test_async(if_loopback);
 271
 272         test_pipe(if_loopback);
 273
 274         test_event_loop(if_loopback);
 275
 276         test_link_configure(rtnl, if_loopback);
 277
 278         assert(sd_rtnl_message_link_new(RTM_GETLINK, if_loopback, &m) >= 0);
 279         assert(m);
 280
 281         assert(sd_rtnl_message_get_type(m, &type) >= 0);
 282         assert(type == RTM_GETLINK);
 283
 284         assert(sd_rtnl_message_read(m, &type, &data) == 0);
 285
 286         assert(sd_rtnl_call(rtnl, m, 0, &r) == 1);
 287         assert(sd_rtnl_message_get_type(r, &type) >= 0);
 288         assert(type == RTM_NEWLINK);
 289
 290         assert(sd_rtnl_message_read(m, &type, &data) == 0);
 291         assert((r = sd_rtnl_message_unref(r)) == NULL);
 292
 293         assert(sd_rtnl_call(rtnl, m, -1, &r) == -EPERM);
 294         assert((m = sd_rtnl_message_unref(m)) == NULL);
 295         assert((r = sd_rtnl_message_unref(r)) == NULL);
 296
 297         assert(sd_rtnl_message_link_new(RTM_GETLINK, if_loopback, &m) >= 0);
 298         assert(m);
 299
 300         assert(sd_rtnl_message_append_u32(m, IFLA_MTU, mtu) >= 0);
 301         assert(sd_rtnl_message_read(m, &type, (void **) &mtu_reply) == 1);
 302
 303         assert(type == IFLA_MTU);
 304         assert(*mtu_reply == 0);
 305
 306         assert(sd_rtnl_message_read(m, &type, &data) == 0);
 307
 308         assert(sd_rtnl_call(rtnl, m, -1, &r) == 1);
 309         while (sd_rtnl_message_read(r, &type, &data) > 0) {
 310                 switch (type) {
 311 //                        case IFLA_MTU:
 312 //                                assert(*(unsigned int *) data == 65536);
 313 //                                break;
 314 //                        case IFLA_QDISC:
 315 //                                assert(streq((char *) data, "noqueue"));
 316 //                                break;
 317                         case IFLA_IFNAME:
 318                                 assert(streq((char *) data, "lo"));
 319                                 break;
 320                 }
 321         }
 322
 323         assert(sd_rtnl_flush(rtnl) >= 0);
 324
 325         assert((m = sd_rtnl_message_unref(m)) == NULL);
 326         assert((r = sd_rtnl_message_unref(r)) == NULL);
 327         assert((rtnl = sd_rtnl_unref(rtnl)) == NULL);
 328
 329         return EXIT_SUCCESS;
 330 }