package/wprobe/src/user/wprobe-util.c

   1 /*
   2  * wprobe-test.c: Wireless probe user space test code
   3  * Copyright (C) 2008-2009 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <sys/types.h>
  17 #include <sys/socket.h>
  18 #include <sys/wait.h>
  19 #include <arpa/inet.h>
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <stdlib.h>
  23 #include <inttypes.h>
  24 #include <errno.h>
  25 #include <stdint.h>
  26 #include <getopt.h>
  27 #include <stdbool.h>
  28 #include <unistd.h>
  29 #include <netdb.h>
  30 #include <fcntl.h>
  31 #include <signal.h>
  32
  33 #include <linux/wprobe.h>
  34 #include "wprobe.h"
  35
  36 static bool simple_mode = false;
  37
  38 static const char *
  39 wprobe_dump_value(struct wprobe_attribute *attr)
  40 {
  41         static char buf[128];
  42
  43 #define HANDLE_TYPE(_type, _format) \
  44         case WPROBE_VAL_##_type: \
  45                 snprintf(buf, sizeof(buf), _format, attr->val._type); \
  46                 break
  47
  48         switch(attr->type) {
  49                 HANDLE_TYPE(S8, "%d");
  50                 HANDLE_TYPE(S16, "%d");
  51                 HANDLE_TYPE(S32, "%d");
  52                 HANDLE_TYPE(S64, "%lld");
  53                 HANDLE_TYPE(U8, "%d");
  54                 HANDLE_TYPE(U16, "%d");
  55                 HANDLE_TYPE(U32, "%d");
  56                 HANDLE_TYPE(U64, "%lld");
  57                 case WPROBE_VAL_STRING:
  58                         /* FIXME: implement this */
  59                 default:
  60                         strncpy(buf, "<unknown>", sizeof(buf));
  61                         break;
  62         }
  63         if ((attr->flags & WPROBE_F_KEEPSTAT) &&
  64                 (attr->val.n > 0)) {
  65                 int len = strlen(buf);
  66                 if (simple_mode)
  67                         snprintf(buf + len, sizeof(buf) - len, ";%.02f;%.02f;%d;%lld;%lld", attr->val.avg, attr->val.stdev, attr->val.n, attr->val.s, attr->val.ss);
  68                 else
  69                         snprintf(buf + len, sizeof(buf) - len, " (avg: %.02f; stdev: %.02f, n=%d)", attr->val.avg, attr->val.stdev, attr->val.n);
  70         }
  71 #undef HANDLE_TYPE
  72
  73         return buf;
  74 }
  75
  76
  77 static void
  78 wprobe_dump_data(struct wprobe_iface *dev)
  79 {
  80         struct wprobe_attribute *attr;
  81         struct wprobe_link *link;
  82         bool first = true;
  83
  84         if (!simple_mode)
  85                 fprintf(stderr, "\n");
  86         wprobe_request_data(dev, NULL);
  87         list_for_each_entry(attr, &dev->global_attr, list) {
  88                 if (simple_mode) {
  89                         if (first)
  90                                 fprintf(stdout, "[global]\n");
  91                         fprintf(stdout, "%s=%s\n", attr->name, wprobe_dump_value(attr));
  92                 } else {
  93                         fprintf(stderr, (first ?
  94                                 "Global:            %s=%s\n" :
  95                                 "                   %s=%s\n"),
  96                                 attr->name,
  97                                 wprobe_dump_value(attr)
  98                         );
  99                 }
 100                 first = false;
 101         }
 102
 103         list_for_each_entry(link, &dev->links, list) {
 104                 first = true;
 105                 wprobe_request_data(dev, link->addr);
 106                 list_for_each_entry(attr, &dev->link_attr, list) {
 107                         if (first) {
 108                                 fprintf((simple_mode ? stdout : stderr),
 109                                         (simple_mode ?
 110                                          "[%02x:%02x:%02x:%02x:%02x:%02x]\n%s=%s\n" :
 111                                          "%02x:%02x:%02x:%02x:%02x:%02x: %s=%s\n"),
 112                                         link->addr[0], link->addr[1], link->addr[2],
 113                                         link->addr[3], link->addr[4], link->addr[5],
 114                                         attr->name,
 115                                         wprobe_dump_value(attr));
 116                                 first = false;
 117                         } else {
 118                                 fprintf((simple_mode ? stdout : stderr),
 119                                         (simple_mode ? "%s=%s\n" :
 120                                          "                   %s=%s\n"),
 121                                         attr->name,
 122                                         wprobe_dump_value(attr));
 123                         }
 124                 }
 125         }
 126         fflush(stdout);
 127 }
 128
 129 static const char *attr_typestr[] = {
 130         [0] = "Unknown",
 131         [WPROBE_VAL_STRING] = "String",
 132         [WPROBE_VAL_U8] = "Unsigned 8 bit",
 133         [WPROBE_VAL_U16] = "Unsigned 16 bit",
 134         [WPROBE_VAL_U32] = "Unsigned 32 bit",
 135         [WPROBE_VAL_U64] = "Unsigned 64 bit",
 136         [WPROBE_VAL_S8] = "Signed 8 bit",
 137         [WPROBE_VAL_S16] = "Signed 16 bit",
 138         [WPROBE_VAL_S32] = "Signed 32 bit",
 139         [WPROBE_VAL_S64] = "Signed 64 bit",
 140 };
 141
 142 static int usage(const char *prog)
 143 {
 144         fprintf(stderr,
 145 #ifndef NO_LOCAL_ACCESS
 146                 "Usage: %s <interface>|<host>:<device>|-P [options]\n"
 147 #else
 148                 "Usage: %s <host>:<device> [options]\n"
 149 #endif
 150                 "\n"
 151                 "Options:\n"
 152                 "  -c:            Only apply configuration\n"
 153                 "  -d:            Delay between measurement dumps (in milliseconds, default: 1000)\n"
 154                 "  -f:            Dump contents of layer 2 filter counters during measurement\n"
 155                 "  -F <file>:     Apply layer 2 filters from <file>\n"
 156                 "  -h:            This help text\n"
 157                 "  -i <interval>: Set measurement interval\n"
 158                 "  -m:            Run measurement loop\n"
 159                 "  -p:            Set the TCP port for server/client (default: 17990)\n"
 160 #ifndef NO_LOCAL_ACCESS
 161                 "  -P:            Run in proxy mode (listen on network)\n"
 162 #endif
 163                 "\n"
 164                 , prog);
 165         exit(1);
 166 }
 167
 168 static void show_attributes(struct wprobe_iface *dev)
 169 {
 170         struct wprobe_attribute *attr;
 171         if (simple_mode)
 172                 return;
 173         list_for_each_entry(attr, &dev->global_attr, list) {
 174                 fprintf(stderr, "Global attribute: '%s' (%s)\n",
 175                         attr->name, attr_typestr[attr->type]);
 176         }
 177         list_for_each_entry(attr, &dev->link_attr, list) {
 178                 fprintf(stderr, "Link attribute: '%s' (%s)\n",
 179                         attr->name, attr_typestr[attr->type]);
 180         }
 181 }
 182
 183 static void show_filter_simple(void *arg, const char *group, struct wprobe_filter_item *items, int n_items)
 184 {
 185         int i;
 186
 187         fprintf(stdout, "[filter:%s]\n", group);
 188         for (i = 0; i < n_items; i++) {
 189                 fprintf(stdout, "%s=%lld;%lld\n",
 190                         items[i].name, items[i].tx, items[i].rx);
 191         }
 192         fflush(stdout);
 193 }
 194
 195
 196 static void show_filter(void *arg, const char *group, struct wprobe_filter_item *items, int n_items)
 197 {
 198         int i;
 199         fprintf(stderr, "Filter group: '%s' (tx/rx)\n", group);
 200         for (i = 0; i < n_items; i++) {
 201                 fprintf(stderr, " - %s (%lld/%lld)\n",
 202                         items[i].name, items[i].tx, items[i].rx);
 203         }
 204 }
 205
 206 static void loop_measurement(struct wprobe_iface *dev, bool print_filters, unsigned long delay)
 207 {
 208         while (1) {
 209                 usleep(delay * 1000);
 210                 wprobe_update_links(dev);
 211                 wprobe_dump_data(dev);
 212                 if (print_filters)
 213                         wprobe_dump_filters(dev, simple_mode ? show_filter_simple : show_filter, NULL);
 214         }
 215 }
 216
 217 static void set_filter(struct wprobe_iface *dev, const char *filename)
 218 {
 219         unsigned char *buf = NULL;
 220         unsigned int buflen = 0;
 221         unsigned int len = 0;
 222         int fd;
 223
 224         /* clear filter */
 225         if (filename[0] == 0) {
 226                 dev->filter_len = -1;
 227                 return;
 228         }
 229
 230         fd = open(filename, O_RDONLY);
 231         if (fd < 0) {
 232                 perror("open filter");
 233                 return;
 234         }
 235
 236         do {
 237                 int rlen;
 238
 239                 if (!buf) {
 240                         len = 0;
 241                         buflen = 1024;
 242                         buf = malloc(1024);
 243                 } else {
 244                         buflen *= 2;
 245                         buf = realloc(buf, buflen);
 246                 }
 247                 rlen = read(fd, buf + len, buflen - len);
 248                 if (rlen < 0)
 249                         break;
 250
 251                 len += rlen;
 252         } while (len == buflen);
 253
 254         dev->filter = buf;
 255         dev->filter_len = len;
 256         close(fd);
 257 }
 258
 259 #ifndef NO_LOCAL_ACCESS
 260
 261 static void sigchld_handler(int s)
 262 {
 263         while (waitpid(-1, NULL, WNOHANG) > 0);
 264 }
 265
 266 static int run_proxy(int port)
 267 {
 268         struct sockaddr_in sa;
 269         struct sigaction sig;
 270         int v = 1;
 271         int s;
 272
 273         s = socket(AF_INET, SOCK_STREAM, 0);
 274         if (s < 0) {
 275                 perror("socket");
 276                 return 1;
 277         }
 278
 279         sig.sa_handler = sigchld_handler;  // Signal Handler fuer Zombie Prozesse
 280         sigemptyset(&sig.sa_mask);
 281         sig.sa_flags = SA_RESTART;
 282         sigaction(SIGCHLD, &sig, NULL);
 283
 284         memset(&sa, 0, sizeof(sa));
 285         sa.sin_family = AF_INET;
 286         sa.sin_addr.s_addr = htonl(INADDR_ANY);
 287         sa.sin_port = htons(wprobe_port);
 288
 289         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &v, sizeof(v));
 290         if (bind(s, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
 291                 perror("bind");
 292                 return 1;
 293         }
 294         if (listen(s, 10)) {
 295                 perror("listen");
 296                 return 1;
 297         }
 298         while(1) {
 299                 unsigned int addrlen = sizeof(struct sockaddr_in);
 300                 int ret, c;
 301
 302                 c = accept(s, (struct sockaddr *)&sa, &addrlen);
 303                 if (c < 0) {
 304                         if (errno == EINTR)
 305                                 continue;
 306
 307                         perror("accept");
 308                         return 1;
 309                 }
 310                 if (fork() == 0) {
 311                         /* close server socket, stdin, stdout, stderr */
 312                         close(s);
 313                         close(0);
 314                         close(1);
 315                         close(2);
 316
 317                         wprobe_server_init(c);
 318                         do {
 319                                 ret = wprobe_server_handle(c);
 320                         } while (ret >= 0);
 321                         wprobe_server_done();
 322                         close(c);
 323                         exit(0);
 324                 }
 325                 close(c);
 326         }
 327
 328         return 0;
 329 }
 330 #endif
 331
 332 int main(int argc, char **argv)
 333 {
 334         struct wprobe_iface *dev = NULL;
 335         const char *ifname;
 336         const char *prog = argv[0];
 337         char *err = NULL;
 338         enum {
 339                 CMD_NONE,
 340                 CMD_CONFIG,
 341                 CMD_MEASURE,
 342                 CMD_PROXY,
 343         } cmd = CMD_NONE;
 344         const char *filter = NULL;
 345         bool print_filters = false;
 346         unsigned long delay = 1000;
 347         int interval = -1;
 348         int ch;
 349
 350         if (argc < 2)
 351                 return usage(prog);
 352
 353 #ifndef NO_LOCAL_ACCESS
 354         if (!strcmp(argv[1], "-P")) {
 355                 while ((ch = getopt(argc - 1, argv + 1, "p:")) != -1) {
 356                         switch(ch) {
 357                         case 'p':
 358                                 /* set port */
 359                                 wprobe_port = strtoul(optarg, NULL, 0);
 360                                 break;
 361                         default:
 362                                 return usage(prog);
 363                         }
 364                 }
 365                 return run_proxy(wprobe_port);
 366         }
 367 #endif
 368
 369         if (argv[1][0] == '-')
 370                 return usage(prog);
 371
 372         ifname = argv[1];
 373         argv++;
 374         argc--;
 375
 376         while ((ch = getopt(argc, argv, "cd:fF:hi:msp:")) != -1) {
 377                 switch(ch) {
 378                 case 'c':
 379                         cmd = CMD_CONFIG;
 380                         break;
 381                 case 'd':
 382                         delay = strtoul(optarg, NULL, 10);
 383                         break;
 384                 case 'm':
 385                         cmd = CMD_MEASURE;
 386                         break;
 387                 case 'i':
 388                         interval = strtoul(optarg, NULL, 10);
 389                         break;
 390                 case 'f':
 391                         print_filters = true;
 392                         break;
 393                 case 'F':
 394                         if (filter) {
 395                                 fprintf(stderr, "Cannot set multiple filters\n");
 396                                 return usage(prog);
 397                         }
 398                         filter = optarg;
 399                         break;
 400                 case 's':
 401                         simple_mode = true;
 402                         break;
 403                 case 'p':
 404                         /* set port */
 405                         wprobe_port = strtoul(optarg, NULL, 0);
 406                         break;
 407                 case 'h':
 408                 default:
 409                         usage(prog);
 410                         break;
 411                 }
 412         }
 413
 414         dev = wprobe_get_auto(ifname, &err);
 415         if (!dev || (list_empty(&dev->global_attr) &&
 416                 list_empty(&dev->link_attr))) {
 417                 if (err)
 418                         fprintf(stderr, "%s\n", err);
 419                 else
 420                         fprintf(stderr, "Interface '%s' not found\n", ifname);
 421                 return 1;
 422         }
 423
 424         if (filter || interval >= 0) {
 425                 if (filter)
 426                         set_filter(dev, filter);
 427                 if (interval >= 0)
 428                         dev->interval = interval;
 429
 430                 wprobe_apply_config(dev);
 431         }
 432
 433         if (cmd != CMD_CONFIG)
 434                 show_attributes(dev);
 435         if (cmd == CMD_MEASURE)
 436                 loop_measurement(dev, print_filters, delay);
 437
 438         wprobe_free_dev(dev);
 439
 440         return 0;
 441 }