jjako | 52c2414 | 2002-12-16 13:33:51 +0000 | [diff] [blame] | 1 | /* |
| 2 | * OpenGGSN - Gateway GPRS Support Node |
| 3 | * Copyright (C) 2002 Mondru AB. |
| 4 | * |
| 5 | * The contents of this file may be used under the terms of the GNU |
| 6 | * General Public License Version 2, provided that the above copyright |
| 7 | * notice and this permission notice is included in all copies or |
| 8 | * substantial portions of the software. |
| 9 | * |
| 10 | * The initial developer of the original code is |
| 11 | * Jens Jakobsen <jj@openggsn.org> |
| 12 | * |
| 13 | * Contributor(s): |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | /* |
| 18 | * gtpie.c: Contains functions to encapsulate and decapsulate GTP |
| 19 | * information elements |
| 20 | * |
| 21 | * |
| 22 | * Encapsulation |
| 23 | * - gtpie_tlv, gtpie_tv0, gtpie_tv1, gtpie_tv2 ... Adds information |
| 24 | * elements to a buffer. |
| 25 | * |
| 26 | * Decapsulation |
| 27 | * - gtpie_decaps: Returns array with pointers to information elements. |
| 28 | * - getie_getie: Returns the pointer of a particular element. |
| 29 | * - gtpie_gettlv: Copies tlv information element. Return 0 on success. |
| 30 | * - gtpie_gettv: Copies tv information element. Return 0 on success. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #include <stdio.h> |
| 35 | #include <sys/types.h> |
| 36 | #include <netinet/in.h> |
| 37 | #include <string.h> |
| 38 | |
| 39 | #include "gtpie.h" |
| 40 | |
| 41 | int gtpie_tlv(void *p, int *length, int size, u_int8_t t, int l, void *v) { |
| 42 | if ((*length + 3 + l) >= size) return 1; |
| 43 | ((union gtpie_member*) (p + *length))->tlv.t = hton8(t); |
| 44 | ((union gtpie_member*) (p + *length))->tlv.l = hton16(l); |
| 45 | memcpy((void*) (p + *length +3), v, l); |
| 46 | *length += 3 + l; |
| 47 | return 0; |
| 48 | } |
| 49 | |
| 50 | int gtpie_tv0(void *p, int *length, int size, u_int8_t t, int l, u_int8_t *v) { |
| 51 | if ((*length + 1 + l) >= size) return 1; |
| 52 | ((union gtpie_member*) (p + *length))->tv0.t = hton8(t); |
| 53 | memcpy((void*) (p + *length +1), v, l); |
| 54 | *length += 1 + l; |
| 55 | return 0; |
| 56 | } |
| 57 | |
| 58 | int gtpie_tv1(void *p, int *length, int size, u_int8_t t, u_int8_t v) { |
| 59 | if ((*length + 2) >= size) return 1; |
| 60 | ((union gtpie_member*) (p + *length))->tv1.t = hton8(t); |
| 61 | ((union gtpie_member*) (p + *length))->tv1.v = hton8(v); |
| 62 | *length += 2; |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | int gtpie_tv2(void *p, int *length, int size, u_int8_t t, u_int16_t v) { |
| 67 | if ((*length + 3) >= size) return 1; |
| 68 | ((union gtpie_member*) (p + *length))->tv2.t = hton8(t); |
| 69 | ((union gtpie_member*) (p + *length))->tv2.v = hton16(v); |
| 70 | *length += 3; |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | int gtpie_tv4(void *p, int *length, int size, u_int8_t t, u_int32_t v) { |
| 75 | if ((*length + 5) >= size) return 1; |
| 76 | ((union gtpie_member*) (p + *length))->tv4.t = hton8(t); |
| 77 | ((union gtpie_member*) (p + *length))->tv4.v = hton32(v); |
| 78 | *length += 5; |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | int gtpie_getie(union gtpie_member* ie[], int type, int instance) { |
| 83 | int j; |
| 84 | for (j=0; j< GTPIE_SIZE; j++) { |
| 85 | if ((ie[j] != 0) && (ie[j]->t == type)) { |
| 86 | if (instance-- == 0) return j; |
| 87 | } |
| 88 | } |
| 89 | return -1; |
| 90 | } |
| 91 | |
| 92 | int gtpie_exist(union gtpie_member* ie[], int type, int instance) { |
| 93 | int j; |
| 94 | for (j=0; j< GTPIE_SIZE; j++) { |
| 95 | if ((ie[j] != 0) && (ie[j]->t == type)) { |
| 96 | if (instance-- == 0) return 1; |
| 97 | } |
| 98 | } |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | int gtpie_gettlv(union gtpie_member* ie[], int type, int instance, |
| 103 | int *length, void *dst, int size){ |
| 104 | int ien; |
| 105 | ien = gtpie_getie(ie, type, instance); |
| 106 | if (ien>=0) { |
| 107 | *length = ntoh16(ie[ien]->tlv.l); |
| 108 | if (*length <= size) |
| 109 | memcpy(dst, ie[ien]->tlv.v, *length); |
| 110 | else |
| 111 | return EOF; |
| 112 | } |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | int gtpie_gettv0(union gtpie_member* ie[], int type, int instance, |
| 117 | void *dst, int size){ |
| 118 | int ien; |
| 119 | ien = gtpie_getie(ie, type, instance); |
| 120 | if (ien>=0) |
| 121 | memcpy(dst, ie[ien]->tv0.v, size); |
| 122 | else |
| 123 | return EOF; |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | int gtpie_gettv1(union gtpie_member* ie[], int type, int instance, |
| 128 | uint8_t *dst){ |
| 129 | int ien; |
| 130 | ien = gtpie_getie(ie, type, instance); |
| 131 | if (ien>=0) |
| 132 | *dst = ntoh8(ie[ien]->tv1.v); |
| 133 | else |
| 134 | return EOF; |
| 135 | return 0; |
| 136 | } |
| 137 | |
| 138 | int gtpie_gettv2(union gtpie_member* ie[], int type, int instance, |
| 139 | uint16_t *dst){ |
| 140 | int ien; |
| 141 | ien = gtpie_getie(ie, type, instance); |
| 142 | if (ien>=0) |
| 143 | *dst = ntoh16(ie[ien]->tv2.v); |
| 144 | else |
| 145 | return EOF; |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | int gtpie_gettv4(union gtpie_member* ie[], int type, int instance, |
| 150 | uint32_t *dst){ |
| 151 | int ien; |
| 152 | ien = gtpie_getie(ie, type, instance); |
| 153 | if (ien>=0) |
| 154 | *dst = ntoh32(ie[ien]->tv4.v); |
| 155 | else |
| 156 | return EOF; |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | int gtpie_decaps(union gtpie_member* ie[], void *pack, unsigned len) { |
| 161 | int i; |
| 162 | int j = 0; |
| 163 | unsigned char *p; |
| 164 | unsigned char *end; |
| 165 | |
| 166 | end = (unsigned char*) pack + len; |
| 167 | p = pack; |
| 168 | |
| 169 | memset(ie, 0, 4 * GTPIE_SIZE); |
| 170 | |
| 171 | while (p<end) { |
| 172 | if (GTPIE_DEBUG) { |
| 173 | printf("The packet looks like this:\n"); |
| 174 | for( i=0; i<(end-p); i++) { |
| 175 | printf("%02x ", (unsigned char)*(char *)(p+i)); |
| 176 | if (!((i+1)%16)) printf("\n"); |
| 177 | }; |
| 178 | printf("\n"); |
| 179 | } |
| 180 | |
| 181 | switch (*p) { |
| 182 | case GTPIE_CAUSE: /* TV GTPIE types with value length 1 */ |
| 183 | case GTPIE_REORDER: |
| 184 | case GTPIE_MAP_CAUSE: |
| 185 | case GTPIE_MS_VALIDATED: |
| 186 | case GTPIE_RECOVERY: |
| 187 | case GTPIE_SELECTION_MODE: |
| 188 | case GTPIE_TEARDOWN: |
| 189 | case GTPIE_NSAPI: |
| 190 | case GTPIE_RANAP_CAUSE: |
| 191 | case GTPIE_RP_SMS: |
| 192 | case GTPIE_RP: |
| 193 | case GTPIE_MS_NOT_REACH: |
| 194 | if (j<GTPIE_SIZE) { |
| 195 | ie[j] = (union gtpie_member*) p; |
| 196 | if (GTPIE_DEBUG) printf("GTPIE TV1 found. Type %d, value %d\n", |
| 197 | ie[j]->tv1.t, ie[j]->tv1.v); |
| 198 | p+= 1 + 1; |
| 199 | j++; |
| 200 | } |
| 201 | break; |
| 202 | case GTPIE_FL_DI: /* TV GTPIE types with value length 2 */ |
| 203 | case GTPIE_FL_C: |
| 204 | case GTPIE_PFI: |
| 205 | case GTPIE_CHARGING_C: |
| 206 | case GTPIE_TRACE_REF: |
| 207 | case GTPIE_TRACE_TYPE: |
| 208 | if (j<GTPIE_SIZE) { |
| 209 | ie[j] = (union gtpie_member*) p; |
| 210 | if (GTPIE_DEBUG) printf("GTPIE TV2 found. Type %d, value %d\n", |
| 211 | ie[j]->tv2.t, ie[j]->tv2.v); |
| 212 | p+= 1 + 2; |
| 213 | j++; |
| 214 | } |
| 215 | break; |
| 216 | case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */ |
| 217 | case GTPIE_P_TMSI_S: |
| 218 | if (j<GTPIE_SIZE) { |
| 219 | ie[j] = (union gtpie_member*) p; |
| 220 | if (GTPIE_DEBUG) printf("GTPIE TV 3 found. Type %d, value %d, %d, %d\n", |
| 221 | ie[j]->tv0.t, ie[j]->tv0.v[0], |
| 222 | ie[j]->tv0.v[1], ie[j]->tv0.v[2]); |
| 223 | p+= 1 + 3; |
| 224 | j++; |
| 225 | } |
| 226 | break; |
| 227 | case GTPIE_TLLI: /* TV GTPIE types with value length 4 */ |
| 228 | case GTPIE_P_TMSI: |
| 229 | case GTPIE_CHARGING_ID: |
| 230 | if (j<GTPIE_SIZE) { |
| 231 | /* case GTPIE_TEI_DI: gtp1 */ |
| 232 | /* case GTPIE_TEI_C: gtp1 */ |
| 233 | ie[j] = (union gtpie_member*) p; |
| 234 | if (GTPIE_DEBUG) printf("GTPIE TV 4 found. Type %d, value %d\n", |
| 235 | ie[j]->tv4.t, ie[j]->tv4.v); |
| 236 | p+= 1 + 4; |
| 237 | j++; |
| 238 | } |
| 239 | break; |
| 240 | case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */ |
| 241 | if (j<GTPIE_SIZE) { |
| 242 | ie[j] = (union gtpie_member*) p; |
| 243 | if (GTPIE_DEBUG) printf("GTPIE TV 5 found. Type %d\n", ie[j]->tv0.t); |
| 244 | p+= 1 + 5; |
| 245 | j++; |
| 246 | } |
| 247 | break; |
| 248 | case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */ |
| 249 | if (j<GTPIE_SIZE) { |
| 250 | ie[j] = (union gtpie_member*) p; |
| 251 | if (GTPIE_DEBUG) printf("GTPIE TV 7 found. Type %d\n", ie[j]->tv0.t); |
| 252 | p+= 1 + 7; |
| 253 | j++; |
| 254 | } |
| 255 | break; |
| 256 | case GTPIE_IMSI: /* TV GTPIE types with value length 8 */ |
| 257 | case GTPIE_RAI: |
| 258 | if (j<GTPIE_SIZE) { |
| 259 | ie[j] = (union gtpie_member*) p; |
| 260 | if (GTPIE_DEBUG) printf("GTPIE TV 8 found. Type %d, value 0x%llx\n", |
| 261 | ie[j]->tv0.t, ie[j]->tv8.v); |
| 262 | p+= 1 + 8; |
| 263 | j++; |
| 264 | } |
| 265 | break; |
| 266 | case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */ |
| 267 | if (j<GTPIE_SIZE) { |
| 268 | ie[j] = (union gtpie_member*) p; |
| 269 | if (GTPIE_DEBUG) printf("GTPIE TV 28 found. Type %d\n", ie[j]->tv0.t); |
| 270 | p+= 1 + 28; |
| 271 | j++; |
| 272 | } |
| 273 | break; |
| 274 | case GTPIE_EXT_HEADER_T: /* GTP extension header */ |
| 275 | if (j<GTPIE_SIZE) { |
| 276 | ie[j] = (union gtpie_member*) p; |
| 277 | if (GTPIE_DEBUG) printf("GTPIE GTP extension header found. Type %d\n", |
| 278 | ie[j]->ext.t); |
| 279 | p+= 2 + ntoh8(ie[j]->ext.l); |
| 280 | j++; |
| 281 | } |
| 282 | break; |
| 283 | case GTPIE_EUA: /* TLV GTPIE types with variable length */ |
| 284 | case GTPIE_MM_CONTEXT: |
| 285 | case GTPIE_PDP_CONTEXT: |
| 286 | case GTPIE_APN: |
| 287 | case GTPIE_PCO: |
| 288 | case GTPIE_GSN_ADDR: |
| 289 | case GTPIE_MSISDN: |
| 290 | case GTPIE_QOS_PROFILE: |
| 291 | case GTPIE_AUTH_QUINTUP: |
| 292 | case GTPIE_TFT: |
| 293 | case GTPIE_TARGET_INF: |
| 294 | case GTPIE_UTRAN_TRANS: |
| 295 | case GTPIE_RAB_SETUP: |
| 296 | case GTPIE_TRIGGER_ID: |
| 297 | case GTPIE_OMC_ID: |
| 298 | case GTPIE_CHARGING_ADDR: |
| 299 | case GTPIE_PRIVATE: |
| 300 | if (j<GTPIE_SIZE) { |
| 301 | ie[j] = (union gtpie_member*) p; |
| 302 | if (GTPIE_DEBUG) printf("GTPIE TLV found. Type %d\n", ie[j]->tlv.t); |
| 303 | p+= 3 + ntoh16(ie[j]->tlv.l); |
| 304 | j++; |
| 305 | } |
| 306 | break; |
| 307 | default: |
| 308 | if (GTPIE_DEBUG) printf("GTPIE something unknown. Type %d\n", *p); |
| 309 | return EOF; /* We received something unknown */ |
| 310 | } |
| 311 | } |
| 312 | if (p==end) { |
| 313 | if (GTPIE_DEBUG) printf("GTPIE normal return. %lx %lx\n", |
| 314 | (unsigned long) p, (unsigned long) end); |
| 315 | return 0; /* We landed at the end of the packet: OK */ |
| 316 | } |
| 317 | else { |
| 318 | if (GTPIE_DEBUG) printf("GTPIE exceeded end of packet. %lx %lx\n", |
| 319 | (unsigned long) p, (unsigned long) end); |
| 320 | return EOF; /* We exceeded the end of the packet: Error */ |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len) { |
| 325 | int i; |
| 326 | unsigned char *p; |
| 327 | unsigned char *end; |
| 328 | union gtpie_member *m; |
| 329 | int iesize; |
| 330 | |
| 331 | p = pack; |
| 332 | |
| 333 | memset(pack, 0, GTPIE_MAX); |
| 334 | end = p + GTPIE_MAX; |
| 335 | for (i=1; i<GTPIE_SIZE; i++) if (ie[i] != 0) { |
| 336 | if (GTPIE_DEBUG) printf("gtpie_encaps. Type %d\n", i); |
| 337 | m=(union gtpie_member *)p; |
| 338 | switch (i) { |
| 339 | case GTPIE_CAUSE: /* TV GTPIE types with value length 1 */ |
| 340 | case GTPIE_REORDER: |
| 341 | case GTPIE_MAP_CAUSE: |
| 342 | case GTPIE_MS_VALIDATED: |
| 343 | case GTPIE_RECOVERY: |
| 344 | case GTPIE_SELECTION_MODE: |
| 345 | case GTPIE_TEARDOWN: |
| 346 | case GTPIE_NSAPI: |
| 347 | case GTPIE_RANAP_CAUSE: |
| 348 | case GTPIE_RP_SMS: |
| 349 | case GTPIE_RP: |
| 350 | case GTPIE_MS_NOT_REACH: |
| 351 | iesize = 2; |
| 352 | break; |
| 353 | case GTPIE_FL_DI: /* TV GTPIE types with value length 2 */ |
| 354 | case GTPIE_FL_C: |
| 355 | case GTPIE_PFI: |
| 356 | case GTPIE_CHARGING_C: |
| 357 | case GTPIE_TRACE_REF: |
| 358 | case GTPIE_TRACE_TYPE: |
| 359 | iesize = 3; |
| 360 | break; |
| 361 | case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */ |
| 362 | case GTPIE_P_TMSI_S: |
| 363 | iesize = 4; |
| 364 | break; |
| 365 | case GTPIE_TLLI: /* TV GTPIE types with value length 4 */ |
| 366 | case GTPIE_P_TMSI: |
| 367 | /* case GTPIE_TEI_DI: only in gtp1*/ |
| 368 | /* case GTPIE_TEI_C: only in gtp1*/ |
| 369 | case GTPIE_CHARGING_ID: |
| 370 | iesize = 5; |
| 371 | break; |
| 372 | case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */ |
| 373 | iesize = 6; |
| 374 | break; |
| 375 | case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */ |
| 376 | iesize = 8; |
| 377 | break; |
| 378 | case GTPIE_IMSI: /* TV GTPIE types with value length 8 */ |
| 379 | case GTPIE_RAI: |
| 380 | iesize = 9; |
| 381 | break; |
| 382 | case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */ |
| 383 | iesize = 29; |
| 384 | break; |
| 385 | case GTPIE_EXT_HEADER_T: /* GTP extension header */ |
| 386 | iesize = 2 + hton8(ie[i]->ext.l); |
| 387 | break; |
| 388 | case GTPIE_EUA: /* TLV GTPIE types with length length 2 */ |
| 389 | case GTPIE_MM_CONTEXT: |
| 390 | case GTPIE_PDP_CONTEXT: |
| 391 | case GTPIE_APN: |
| 392 | case GTPIE_PCO: |
| 393 | case GTPIE_GSN_ADDR: |
| 394 | case GTPIE_MSISDN: |
| 395 | case GTPIE_QOS_PROFILE: |
| 396 | case GTPIE_AUTH_QUINTUP: |
| 397 | case GTPIE_TFT: |
| 398 | case GTPIE_TARGET_INF: |
| 399 | case GTPIE_UTRAN_TRANS: |
| 400 | case GTPIE_RAB_SETUP: |
| 401 | case GTPIE_TRIGGER_ID: |
| 402 | case GTPIE_OMC_ID: |
| 403 | case GTPIE_CHARGING_ADDR: |
| 404 | case GTPIE_PRIVATE: |
| 405 | iesize = 3 + hton16(ie[i]->tlv.l); |
| 406 | break; |
| 407 | default: |
| 408 | return 2; /* We received something unknown */ |
| 409 | } |
| 410 | if (p+iesize < end) { |
| 411 | memcpy(p, ie[i], iesize); |
| 412 | p += iesize; |
| 413 | *len += iesize; |
| 414 | } |
| 415 | else return 2; /* Out of space */ |
| 416 | } |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | int gtpie_encaps2(union gtpie_member ie[], int size, |
| 421 | void *pack, unsigned *len) { |
| 422 | int i, j; |
| 423 | unsigned char *p; |
| 424 | unsigned char *end; |
| 425 | union gtpie_member *m; |
| 426 | int iesize; |
| 427 | |
| 428 | p = pack; |
| 429 | |
| 430 | memset(pack, 0, GTPIE_MAX); |
| 431 | end = p + GTPIE_MAX; |
| 432 | for (j=0; j<GTPIE_SIZE; j++) for (i=0; i<size; i++) if (ie[i].t == j) { |
| 433 | if (GTPIE_DEBUG) printf("gtpie_encaps. Number %d, Type %d\n", i, ie[i].t); |
| 434 | m=(union gtpie_member *)p; |
| 435 | switch (ie[i].t) { |
| 436 | case GTPIE_CAUSE: /* TV GTPIE types with value length 1 */ |
| 437 | case GTPIE_REORDER: |
| 438 | case GTPIE_MAP_CAUSE: |
| 439 | case GTPIE_MS_VALIDATED: |
| 440 | case GTPIE_RECOVERY: |
| 441 | case GTPIE_SELECTION_MODE: |
| 442 | case GTPIE_TEARDOWN: |
| 443 | case GTPIE_NSAPI: |
| 444 | case GTPIE_RANAP_CAUSE: |
| 445 | case GTPIE_RP_SMS: |
| 446 | case GTPIE_RP: |
| 447 | case GTPIE_MS_NOT_REACH: |
| 448 | iesize = 2; |
| 449 | break; |
| 450 | case GTPIE_PFI: /* TV GTPIE types with value length 2 */ |
| 451 | case GTPIE_CHARGING_C: |
| 452 | case GTPIE_TRACE_REF: |
| 453 | case GTPIE_TRACE_TYPE: |
| 454 | iesize = 3; |
| 455 | break; |
| 456 | case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */ |
| 457 | case GTPIE_P_TMSI_S: |
| 458 | iesize = 4; |
| 459 | break; |
| 460 | case GTPIE_TLLI: /* TV GTPIE types with value length 4 */ |
| 461 | case GTPIE_P_TMSI: |
| 462 | case GTPIE_TEI_DI: |
| 463 | case GTPIE_TEI_C: |
| 464 | iesize = 5; |
| 465 | break; |
| 466 | case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */ |
| 467 | iesize = 6; |
| 468 | break; |
| 469 | case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */ |
| 470 | iesize = 8; |
| 471 | break; |
| 472 | case GTPIE_IMSI: /* TV GTPIE types with value length 8 */ |
| 473 | case GTPIE_RAI: |
| 474 | iesize = 9; |
| 475 | break; |
| 476 | case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */ |
| 477 | iesize = 29; |
| 478 | break; |
| 479 | case GTPIE_EXT_HEADER_T: /* GTP extension header */ |
| 480 | iesize = 2 + hton8(ie[i].ext.l); |
| 481 | break; |
| 482 | case GTPIE_CHARGING_ID: /* TLV GTPIE types with length length 2 */ |
| 483 | case GTPIE_EUA: |
| 484 | case GTPIE_MM_CONTEXT: |
| 485 | case GTPIE_PDP_CONTEXT: |
| 486 | case GTPIE_APN: |
| 487 | case GTPIE_PCO: |
| 488 | case GTPIE_GSN_ADDR: |
| 489 | case GTPIE_MSISDN: |
| 490 | case GTPIE_QOS_PROFILE: |
| 491 | case GTPIE_AUTH_QUINTUP: |
| 492 | case GTPIE_TFT: |
| 493 | case GTPIE_TARGET_INF: |
| 494 | case GTPIE_UTRAN_TRANS: |
| 495 | case GTPIE_RAB_SETUP: |
| 496 | case GTPIE_TRIGGER_ID: |
| 497 | case GTPIE_OMC_ID: |
| 498 | case GTPIE_CHARGING_ADDR: |
| 499 | case GTPIE_PRIVATE: |
| 500 | iesize = 3 + hton16(ie[i].tlv.l); |
| 501 | break; |
| 502 | default: |
| 503 | return 2; /* We received something unknown */ |
| 504 | } |
| 505 | if (p+iesize < end) { |
| 506 | memcpy(p, &ie[i], iesize); |
| 507 | p += iesize; |
| 508 | *len += iesize; |
| 509 | } |
| 510 | else return 2; /* Out of space */ |
| 511 | } |
| 512 | return 0; |
| 513 | } |