lib/libatm/ioctl_subr.c

   1 /*
   2  *
   3  * ===================================
   4  * HARP  |  Host ATM Research Platform
   5  * ===================================
   6  *
   7  *
   8  * This Host ATM Research Platform ("HARP") file (the "Software") is
   9  * made available by Network Computing Services, Inc. ("NetworkCS")
  10  * "AS IS".  NetworkCS does not provide maintenance, improvements or
  11  * support of any kind.
  12  *
  13  * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
  14  * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
  15  * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
  16  * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
  17  * In no event shall NetworkCS be responsible for any damages, including
  18  * but not limited to consequential damages, arising from or relating to
  19  * any use of the Software or related support.
  20  *
  21  * Copyright 1994-1998 Network Computing Services, Inc.
  22  *
  23  * Copies of this Software may be made, however, the above copyright
  24  * notice must be reproduced on all copies.
  25  *
  26  * $FreeBSD: src/lib/libatm/ioctl_subr.c,v 1.3.2.1 2001/09/28 16:52:10 dillon Exp $
  27  * $DragonFly: src/lib/libatm/ioctl_subr.c,v 1.4 2004/09/23 23:39:08 geekgod Exp $
  28  */
  29
  30 /*
  31  * User Space Library Functions
  32  * ----------------------------
  33  *
  34  * IOCTL subroutines
  35  *
  36  */
  37
  38 #include <sys/types.h>
  39 #include <sys/param.h>
  40 #include <sys/socket.h>
  41 #include <sys/sockio.h>
  42 #include <net/if.h>
  43 #include <netinet/in.h>
  44 #include <netatm/port.h>
  45 #include <netatm/atm.h>
  46 #include <netatm/atm_if.h>
  47 #include <netatm/atm_sap.h>
  48 #include <netatm/atm_sys.h>
  49 #include <netatm/atm_ioctl.h>
  50
  51 #include <errno.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <unistd.h>
  55
  56 #include "libatm.h"
  57
  58 #ifndef TRUE
  59 #define TRUE    1
  60 #endif
  61
  62 #ifndef FALSE
  63 #define FALSE   0
  64 #endif
  65
  66 extern char     *prog;
  67
  68
  69 /*
  70  * Issue an informational IOCTL
  71  *
  72  * The user fills out the opcode and any subtype information.  This
  73  * routine will allocate a buffer and issue the IOCTL.  If the request
  74  * fails because the buffer wasn't big enough, this routine will double
  75  * the buffer size and retry the request repeatedly.  The buffer must
  76  * be freed by the caller.
  77  *
  78  * Arguments:
  79  *      req     pointer to an ATM information request IOCTL structure
  80  *      buf_len length of buffer to be allocated
  81  *
  82  * Returns:
  83  *      -1      error encountered (reason in errno)
  84  *      int     length of the returned VCC information
  85  *
  86  */
  87 int
  88 do_info_ioctl(req, buf_len)
  89         struct atminfreq        *req;
  90         int                     buf_len;
  91 {
  92         int     rc, s;
  93         caddr_t buf;
  94
  95         /*
  96          * Open a socket for the IOCTL
  97          */
  98         s = socket(AF_ATM, SOCK_DGRAM, 0);
  99         if (s < 0) {
 100                 return(-1);
 101         }
 102
 103         /*
 104          * Get memory for returned information
 105          */
 106 mem_retry:
 107         buf = (caddr_t)UM_ALLOC(buf_len);
 108         if (buf == NULL) {
 109                 errno = ENOMEM;
 110                 return(-1);
 111         }
 112
 113         /*
 114          * Set the buffer address and length in the request
 115          */
 116         req->air_buf_addr = buf;
 117         req->air_buf_len = buf_len;
 118
 119         /*
 120          * Issue the IOCTL
 121          */
 122         rc = ioctl(s, AIOCINFO, (caddr_t)req);
 123         if (rc) {
 124                 UM_FREE(buf);
 125                 if (errno == ENOSPC) {
 126                         buf_len = buf_len * 2;
 127                         goto mem_retry;
 128                 }
 129                 return(-1);
 130         }
 131         (void)close(s);
 132         /*
 133          * Set a pointer to the returned info in the request
 134          * and return its length
 135          */
 136         req->air_buf_addr = buf;
 137         return(req->air_buf_len);
 138 }
 139
 140
 141 /*
 142  * Get VCC information
 143  *
 144  * Arguments:
 145  *      intf    pointer to interface name (or null string)
 146  *      vccp    pointer to a pointer to a struct air_vcc_rsp for the
 147  *              address of the returned VCC information
 148  *
 149  * Returns:
 150  *      int     length of the retuned VCC information
 151  *
 152  */
 153 int
 154 get_vcc_info(intf, vccp)
 155         char                    *intf;
 156         struct air_vcc_rsp      **vccp;
 157 {
 158         int     buf_len = sizeof(struct air_vcc_rsp) * 100;
 159         struct atminfreq        air;
 160
 161         /*
 162          * Initialize IOCTL request
 163          */
 164         air.air_opcode = AIOCS_INF_VCC;
 165         UM_ZERO(air.air_vcc_intf, sizeof(air.air_vcc_intf));
 166         if (intf != NULL && strlen(intf) != 0)
 167                 strlcpy(air.air_vcc_intf, intf, IFNAMSIZ);
 168
 169         buf_len = do_info_ioctl(&air, buf_len);
 170
 171         /*
 172          * Return a pointer to the VCC info and its length
 173          */
 174         *vccp = (struct air_vcc_rsp *) air.air_buf_addr;
 175         return(buf_len);
 176 }
 177
 178
 179 /*
 180  * Get subnet mask
 181  *
 182  * Arguments:
 183  *      intf    pointer to an interface name
 184  *      mask    pointer to a struct sockaddr_in to receive the mask
 185  *
 186  * Returns:
 187  *      0       good completion
 188  *      -1      error
 189  *
 190  */
 191 int
 192 get_subnet_mask(intf, mask)
 193         char                    *intf;
 194         struct sockaddr_in      *mask;
 195 {
 196         int                     rc, s;
 197         struct ifreq            req;
 198         struct sockaddr_in      *ip_mask;
 199
 200         /*
 201          * Check parameters
 202          */
 203         if (!intf || !mask ||
 204                         strlen(intf) == 0 ||
 205                         strlen(intf) > IFNAMSIZ-1)
 206                 return(-1);
 207
 208         /*
 209          * Open a socket for the IOCTL
 210          */
 211         s = socket(AF_INET, SOCK_DGRAM, 0);
 212         if (s < 0)
 213                 return(-1);
 214
 215         /*
 216          * Set up and issue the IOCTL
 217          */
 218         UM_ZERO(&req, sizeof(req));
 219         strlcpy(req.ifr_name, intf, sizeof(req.ifr_name));
 220         rc = ioctl(s, SIOCGIFNETMASK, (caddr_t)&req);
 221         (void)close(s);
 222         if (rc)
 223                 return(-1);
 224
 225         /*
 226          * Give the answer back to the caller
 227          */
 228         ip_mask = (struct sockaddr_in *)&req.ifr_addr;
 229         *mask = *ip_mask;
 230         mask->sin_family = AF_INET;
 231
 232         return(0);
 233 }
 234
 235
 236 /*
 237  * Get an interface's MTU
 238  *
 239  * Arguments:
 240  *      intf    pointer to an interface name
 241  *      mtu     pointer to an int to receive the MTU
 242  *
 243  * Returns:
 244  *      >= 0    interface MTU
 245  *      -1      error
 246  *
 247  */
 248 int
 249 get_mtu(intf)
 250         char    *intf;
 251 {
 252         int                     rc, s;
 253         struct ifreq            req;
 254
 255         /*
 256          * Check parameters
 257          */
 258         if (!intf || strlen(intf) == 0 ||
 259                         strlen(intf) > IFNAMSIZ-1)
 260                 return(-1);
 261
 262         /*
 263          * Open a socket for the IOCTL
 264          */
 265         s = socket(AF_INET, SOCK_DGRAM, 0);
 266         if (s < 0)
 267                 return(-1);
 268
 269         /*
 270          * Set up and issue the IOCTL
 271          */
 272         UM_ZERO(&req, sizeof(req));
 273         strlcpy(req.ifr_name, intf, sizeof(req.ifr_name));
 274         rc = ioctl(s, SIOCGIFMTU, (caddr_t)&req);
 275         (void)close(s);
 276
 277         /*
 278          * Set the appropriate return value
 279          */
 280         if (rc)
 281                 return(-1);
 282         else
 283         return(req.ifr_mtu);
 284 }
 285
 286
 287 /*
 288  * Verify netif name
 289  *
 290  * This routine issues an IOCTL to check whether the passed string is
 291  * a valid network interface name.
 292  *
 293  * Arguments:
 294  *      req     pointer to an ATM information request IOCTL structure
 295  *
 296  * Returns:
 297  *      -1              error encountered
 298  *      FALSE (0)       the string is not a NIF name
 299  *      TRUE (> 0)      the string is a valid NIF name
 300  *
 301  */
 302 int
 303 verify_nif_name(name)
 304         char *name;
 305 {
 306         int     rc, s;
 307         struct atminfreq        air;
 308         struct air_netif_rsp    *nif_info;
 309
 310         /*
 311          * Check whether name is of a valid length
 312          */
 313         if (strlen(name) > IFNAMSIZ - 1 ||
 314                         strlen(name) < 1) {
 315                 return(FALSE);
 316         }
 317
 318         /*
 319          * Open a socket for the IOCTL
 320          */
 321         s = socket(AF_ATM, SOCK_DGRAM, 0);
 322         if (s < 0) {
 323                 return(-1);
 324         }
 325
 326         /*
 327          * Get memory for returned information
 328          */
 329         nif_info = (struct air_netif_rsp *)UM_ALLOC(
 330                         sizeof(struct air_netif_rsp));
 331         if (nif_info == NULL) {
 332                 errno = ENOMEM;
 333                 return(-1);
 334         }
 335
 336         /*
 337          * Set up the request
 338          */
 339         air.air_opcode = AIOCS_INF_NIF;
 340         air.air_buf_addr = (caddr_t)nif_info;
 341         air.air_buf_len = sizeof(struct air_netif_rsp);
 342         UM_ZERO(air.air_netif_intf, sizeof(air.air_netif_intf));
 343         strlcpy(air.air_netif_intf, name, sizeof(air.air_netif_intf));
 344
 345         /*
 346          * Issue the IOCTL
 347          */
 348         rc = ioctl(s, AIOCINFO, (caddr_t)&air);
 349         UM_FREE(nif_info);
 350         (void)close(s);
 351
 352         /*
 353          * Base return value on IOCTL return code
 354          */
 355         if (rc)
 356                 return(FALSE);
 357         else
 358                 return(TRUE);
 359 }
 360
 361 /*
 362  * Get Config information
 363  *
 364  * Arguments:
 365  *      intf    pointer to interface name (or null string)
 366  *      cfgp    pointer to a pointer to a struct air_cfg_rsp for the
 367  *              address of the returned Config information
 368  *
 369  * Returns:
 370  *      int     length of returned Config information
 371  *
 372  */
 373 int
 374 get_cfg_info ( intf, cfgp )
 375         char                    *intf;
 376         struct air_cfg_rsp      **cfgp;
 377 {
 378         int     buf_len = sizeof(struct air_cfg_rsp) * 4;
 379         struct atminfreq air;
 380
 381         /*
 382          * Initialize IOCTL request
 383          */
 384         air.air_opcode = AIOCS_INF_CFG;
 385         UM_ZERO ( air.air_cfg_intf, sizeof(air.air_cfg_intf));
 386         if ( intf != NULL && strlen(intf) != 0 )
 387                 strlcpy ( air.air_cfg_intf, intf, IFNAMSIZ );
 388
 389         buf_len = do_info_ioctl ( &air, buf_len );
 390
 391         /*
 392          * Return a pointer to the Config info and its length
 393          */
 394         *cfgp = (struct air_cfg_rsp *) air.air_buf_addr;
 395         return ( buf_len );
 396
 397 }
 398
 399 /*
 400  * Get Physical Interface information
 401  *
 402  * Arguments:
 403  *      intf    pointer to interface name (or null string)
 404  *      intp    pointer to a pointer to a struct air_cfg_rsp for the
 405  *              address of the returned Config information
 406  *
 407  * Returns:
 408  *      int     length of returned Config information
 409  *
 410  */
 411 int
 412 get_intf_info ( intf, intp )
 413         char                    *intf;
 414         struct air_int_rsp      **intp;
 415 {
 416         int     buf_len = sizeof(struct air_int_rsp) * 4;
 417         struct atminfreq air;
 418
 419         /*
 420          * Initialize IOCTL request
 421          */
 422         air.air_opcode = AIOCS_INF_INT;
 423         UM_ZERO ( air.air_int_intf, sizeof(air.air_int_intf));
 424         if ( intf != NULL && strlen(intf) != 0 )
 425                 strlcpy ( air.air_int_intf, intf, IFNAMSIZ );
 426
 427         buf_len = do_info_ioctl ( &air, buf_len );
 428
 429         /*
 430          * Return a pointer to the Physical Interface info and its length
 431          */
 432         *intp = (struct air_int_rsp *) air.air_buf_addr;
 433         return ( buf_len );
 434
 435 }
 436
 437
 438 /*
 439  * Get Netif information
 440  *
 441  * Arguments:
 442  *      intf    pointer to interface name (or null string)
 443  *      netp    pointer to a pointer to a struct air_netif_rsp for the
 444  *              address of the returned Netif information
 445  *
 446  * Returns:
 447  *      int     length of returned Netif information
 448  *
 449  */
 450 int
 451 get_netif_info ( intf, netp )
 452         char                    *intf;
 453         struct air_netif_rsp    **netp;
 454 {
 455         int     buf_len = sizeof(struct air_netif_rsp) * 10;
 456         struct atminfreq air;
 457
 458         /*
 459          * Initialize IOCTL request
 460          */
 461         air.air_opcode = AIOCS_INF_NIF;
 462         UM_ZERO ( air.air_int_intf, sizeof(air.air_int_intf) );
 463         if ( intf != NULL && strlen(intf) != 0 )
 464                 strlcpy ( air.air_int_intf, intf, IFNAMSIZ );
 465
 466         buf_len = do_info_ioctl ( &air, buf_len );
 467
 468         /*
 469          * Return a pointer to the Netif info and its length
 470          */
 471         *netp = (struct air_netif_rsp *) air.air_buf_addr;
 472         return ( buf_len );
 473
 474 }
 475
 476