git.sur5r.net Git - ngadmin/blob - cli/src/admin.c

   1
   2 #ifdef HAVE_CONFIG_H
   3 #include "config.h"
   4 #endif
   5
   6 #include <stdio.h>
   7 #include <signal.h>
   8 #include <unistd.h>
   9
  10 #include <getopt.h>
  11 #ifdef HAVE_LIBREADLINE
  12 #include <setjmp.h>
  13 #include <readline/readline.h>
  14 #include <readline/history.h>
  15 #endif
  16
  17 #include "common.h"
  18 #include "commands.h"
  19
  20
  21 #define MAXCOM  32
  22
  23
  24
  25 static const struct TreeNode* getSubCom (char **com, int n, int *t)
  26 {
  27         int i;
  28         const struct TreeNode *cur, *next;
  29
  30
  31         cur = &commands;
  32         for (i = 0; i < n; i++) {
  33                 /* we have reached a terminal command, exit */
  34                 if (cur->sub == NULL)
  35                         break;
  36
  37                 /* search sub command in sub command array */
  38                 for (next = cur->sub; next->name != NULL && strcmp(next->name, com[i]) != 0; next++);
  39
  40                 /* sub command not found, exit */
  41                 if (next->name == NULL)
  42                         break;
  43
  44                 /* next command is now the current one */
  45                 cur = next;
  46         }
  47
  48         *t = i;
  49
  50
  51         return cur;
  52 }
  53
  54
  55 #ifdef HAVE_LIBREADLINE
  56 static const struct TreeNode *compcur;
  57 static sigjmp_buf jmpbuf;
  58 static bool batch;
  59
  60
  61 static char* my_generator (const char* text, int state)
  62 {
  63         static int len;
  64         static const struct TreeNode *tn;
  65         const char *name;
  66
  67
  68         if (compcur == NULL) {
  69                 /* sub command not found */
  70                 return NULL;
  71         } else if (state == 0) {
  72                 tn = compcur->sub;
  73                 len = strlen(text);
  74         }
  75
  76         if (tn == NULL) /* terminal command */
  77                 return NULL;
  78
  79         while ((name = tn++->name) != NULL) {
  80                 if (strncmp(name, text, len) == 0)
  81                         return strdup(name);
  82         }
  83
  84
  85         return NULL;
  86 }
  87
  88
  89 static char** my_completion (const char *text, int start, int end UNUSED)
  90 {
  91         char *line, *com[MAXCOM];
  92         int i, n;
  93
  94
  95         memset(com, 0, MAXCOM * sizeof(char*));
  96         line = strdup(rl_line_buffer);
  97         line[start] = '\0';
  98         trim(line, start);
  99         n = explode(line, com, MAXCOM);
 100         free(line);
 101
 102         compcur = getSubCom(com, n, &i);
 103         for (i = 0; com[i] != NULL; i++)
 104                 free(com[i]);
 105
 106         if (i < n) /* unknown command */
 107                 return NULL;
 108         else if (compcur->sub == NULL) /* terminal command */
 109                 return rl_completion_matches(text, rl_filename_completion_function);
 110         else /* intermediate command */
 111                 return rl_completion_matches(text, my_generator);
 112 }
 113 #endif /* HAVE_LIBREADLINE */
 114
 115
 116 int main_loop_continue;
 117 static struct ngadmin *nga;
 118 static struct termios orig_term;
 119 struct termios current_term;
 120
 121
 122 NORET static void handler (int sig)
 123 {
 124         switch (sig) {
 125
 126         case SIGTERM:
 127         case SIGINT:
 128                 printf("interrupt\n");
 129
 130 #ifdef HAVE_LIBREADLINE
 131                 current_term.c_lflag |= ECHO;
 132                 tcsetattr(STDIN_FILENO, TCSANOW, &current_term);
 133
 134                 if (!batch && main_loop_continue)
 135                         siglongjmp(jmpbuf, 1);
 136 #endif
 137
 138         default:
 139                 ngadmin_close(nga);
 140
 141                 tcsetattr(STDIN_FILENO, TCSANOW, &orig_term);
 142
 143                 exit(0);
 144         }
 145 }
 146
 147
 148 static int pre_login (const struct ether_addr *mac, int retries)
 149 {
 150         const struct swi_attr *sa;
 151         int i, n, err;
 152
 153
 154         for (i = 1; retries <= 0 || i <= retries; i++) {
 155                 /* scan */
 156                 printf("scan... ");
 157                 fflush(stdout);
 158                 err = ngadmin_scan(nga);
 159                 if (err < 0) {
 160                         printErrCode(err);
 161                         return err;
 162                 }
 163
 164                 /* search switch with requested MAC */
 165                 sa = ngadmin_getSwitchTab(nga, &n);
 166                 while (--n >= 0) {
 167                         if (memcmp(mac, &sa[n].mac, ETH_ALEN) == 0)
 168                                 break;
 169                 }
 170
 171                 if (n < 0) {
 172                         printf("no switch found\n");
 173                 } else {
 174                         printf("done\n");
 175                         break;
 176                 }
 177         }
 178
 179         if (n < 0)
 180                 return 1;
 181
 182         /* login */
 183         printf("login... ");
 184         fflush(stdout);
 185         err = ngadmin_login(nga, n);
 186         if (err < 0)
 187                 printErrCode(err);
 188         else
 189                 printf("done\n");
 190
 191         return err;
 192 }
 193
 194
 195 int main (int argc, char **argv)
 196 {
 197         static const struct option opts[] = {
 198                 {"batch", no_argument, NULL, 'a'},
 199                 {"keep-broadcasting", no_argument, NULL, 'b'},
 200                 {"force-interface", no_argument, NULL, 'f'},
 201                 {"help", no_argument, NULL, 'h'},
 202                 {"interface", required_argument, NULL, 'i'},
 203                 {"local-broadcast", no_argument, NULL, 'l'},
 204                 {"mac", required_argument, NULL, 'm'},
 205                 {"password", required_argument, NULL, 'p'},
 206                 {"retries", required_argument, NULL, 'r'},
 207                 {"timeout", required_argument, NULL, 't'},
 208                 {0, 0, 0, 0}
 209         };
 210         char *line, *com[MAXCOM];
 211         const char *iface = "eth0", *password = NULL;
 212         float timeout = 0.f;
 213         bool kb = false, force = false, global = true;
 214         struct timeval tv;
 215         const struct TreeNode *cur, *next;
 216         struct ether_addr *mac = NULL;
 217         int i, n, retries = 3;
 218
 219
 220         tcgetattr(STDIN_FILENO, &orig_term);
 221         current_term = orig_term;
 222 #ifdef HAVE_LIBREADLINE
 223         batch = false;
 224 #endif
 225
 226         opterr = 0;
 227
 228         while ((n = getopt_long(argc, argv, "abfhi:lm:p:r:t:", opts, NULL)) != -1) {
 229                 switch (n) {
 230
 231                 case 'a':
 232 #ifdef HAVE_LIBREADLINE
 233                         batch = true;
 234 #endif
 235                         break;
 236
 237                 case 'b':
 238                         kb = true;
 239                         break;
 240
 241                 case 'f':
 242                         force = true;
 243                         break;
 244
 245                 case 'h':
 246                         printf("usage: %s [-a] [-b] [-f] [-g] [-i <interface>] [-m <MAC>] [-p <password>]\n", argv[0]);
 247                         goto end;
 248
 249                 case 'i':
 250                         iface = optarg;
 251                         break;
 252
 253                 case 'l':
 254                         global = false;
 255                         break;
 256
 257                 case 'm':
 258                         mac = ether_aton(optarg);
 259                         if (mac == NULL) {
 260                                 printf("invalid MAC\n");
 261                                 goto end;
 262                         }
 263                         break;
 264
 265                 case 'p':
 266                         password = optarg;
 267                         break;
 268
 269                 case 'r':
 270                         retries = strtol(optarg, NULL, 0);
 271                         break;
 272
 273                 case 't':
 274                         timeout = strtof(optarg, NULL);
 275                         break;
 276
 277                 case '?':
 278                         printf("unknown option: \"%s\"\n", argv[optind - 1]);
 279                         goto end;
 280                 }
 281         }
 282
 283         argc -= optind;
 284         argv += optind;
 285
 286         if (argc != 0) {
 287                 printf("unknown trailing options\n");
 288                 goto end;
 289         }
 290
 291
 292         memset(com, 0, MAXCOM * sizeof(char*));
 293
 294         nga = ngadmin_init(iface);
 295         if (nga == NULL) {
 296                 fprintf(stderr, "initialization error\n");
 297                 goto end;
 298         }
 299
 300         /* set timeout */
 301         if (timeout > 0.f) {
 302                 tv.tv_sec = (int)timeout;
 303                 tv.tv_usec = (int)((timeout - (float)tv.tv_sec) * 1.e6f);
 304                 ngadmin_setTimeout(nga, &tv);
 305         }
 306
 307
 308         if (ngadmin_setKeepBroadcasting(nga, kb) != ERR_OK)
 309                 goto end;
 310
 311         if (force && ngadmin_forceInterface(nga) != ERR_OK)
 312                 goto end;
 313
 314         if (ngadmin_useGlobalBroadcast(nga, global) != ERR_OK)
 315                 goto end;
 316
 317 #ifdef HAVE_LIBREADLINE
 318         /* non-TTY inputs are automatically set to batch mode */
 319         if (!isatty(STDIN_FILENO))
 320                 batch = true;
 321 #endif
 322
 323         if (password != NULL)
 324                 ngadmin_setPassword(nga, password);
 325
 326         signal(SIGTERM, handler);
 327         signal(SIGINT, handler);
 328
 329         /* automatic scan & login when switch MAC is specified on the command line */
 330         if (mac != NULL && pre_login(mac, retries) != 0)
 331                 goto end;
 332
 333 #ifdef HAVE_LIBREADLINE
 334         if (!batch) {
 335                 /* initialize readline functions */
 336                 rl_attempted_completion_function = my_completion;
 337                 rl_completion_entry_function = my_generator;
 338
 339                 sigsetjmp(jmpbuf, 1);
 340         }
 341 #endif
 342
 343         main_loop_continue = 1;
 344         while (main_loop_continue) {
 345                 /* read user input */
 346                 line = NULL;
 347                 n = 0;
 348 #ifdef HAVE_LIBREADLINE
 349                 if (batch)
 350                         n = getline(&line, (size_t*)&i, stdin);
 351                 else
 352                         line = readline("> ");
 353 #else
 354                 n = getline(&line, (size_t*)&i, stdin);
 355 #endif
 356                 if (n < 0 || line == NULL)
 357                         goto end;
 358
 359                 /* split string into words */
 360                 trim(line, strlen(line));
 361                 n = explode(line, com, MAXCOM);
 362
 363                 if (n == 0) {
 364                         free(line);
 365                         continue;
 366                 } else {
 367 #ifdef HAVE_LIBREADLINE
 368                         if (!batch)
 369                                 add_history(line);
 370 #endif
 371                         free(line);
 372                 }
 373
 374                 cur = getSubCom(com, n, &i);
 375
 376                 if (cur->sub != NULL) {
 377                         /* not terminal command */
 378                         if (i == 0) {
 379                                 /* root command */
 380                                 printf("unknown command: %s\n", com[i]);
 381                         } else if (i < n) {
 382                                 /* intermediate command, remaining string */
 383                                 printf("unknown %s subcommand: %s\n", com[i - 1], com[i]);
 384                         } else {
 385                                 /* intermediate command, no remaining string */
 386                                 /* print available subcommands */
 387                                 for (next = cur->sub; next->name != NULL; next++)
 388                                         printf("%s ", next->name);
 389                                 putchar('\n');
 390                         }
 391                 } else if (cur->comfunc == NULL) {
 392                         /* erroneous terminal command without function */
 393                         printf("terminal command without function\n");
 394                 } else {
 395                         /* execute terminal command */
 396                         cur->comfunc(n - i, (const char**)&com[i], nga);
 397                 }
 398
 399                 for (i = 0; com[i] != NULL; i++) {
 400                         free(com[i]);
 401                         com[i] = NULL;
 402                 }
 403         }
 404
 405 end:
 406         handler(0);
 407 }
 408
 409