630 lines
15 KiB
C
630 lines
15 KiB
C
/*
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* OpenGGSN - Gateway GPRS Support Node
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* Copyright (C) 2002 Mondru AB.
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*
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* The contents of this file may be used under the terms of the GNU
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* General Public License Version 2, provided that the above copyright
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* notice and this permission notice is included in all copies or
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* substantial portions of the software.
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*
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*/
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/*
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* gtpie.c: Contains functions to encapsulate and decapsulate GTP
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* information elements
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*
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*
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* Encapsulation
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* - gtpie_tlv, gtpie_tv0, gtpie_tv1, gtpie_tv2 ... Adds information
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* elements to a buffer.
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*
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* Decapsulation
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* - gtpie_decaps: Returns array with pointers to information elements.
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* - getie_getie: Returns the pointer of a particular element.
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* - gtpie_gettlv: Copies tlv information element. Return 0 on success.
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* - gtpie_gettv: Copies tv information element. Return 0 on success.
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*
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*/
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#include <../config.h>
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <string.h>
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#include "gtpie.h"
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int gtpie_tlv(void *p, unsigned int *length, unsigned int size, uint8_t t,
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int l, void *v)
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{
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if ((*length + 3 + l) >= size)
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return 1;
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((union gtpie_member *)(p + *length))->tlv.t = hton8(t);
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((union gtpie_member *)(p + *length))->tlv.l = hton16(l);
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memcpy((void *)(p + *length + 3), v, l);
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*length += 3 + l;
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return 0;
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}
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int gtpie_tv0(void *p, unsigned int *length, unsigned int size, uint8_t t,
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int l, uint8_t * v)
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{
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if ((*length + 1 + l) >= size)
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return 1;
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((union gtpie_member *)(p + *length))->tv0.t = hton8(t);
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memcpy((void *)(p + *length + 1), v, l);
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*length += 1 + l;
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return 0;
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}
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int gtpie_tv1(void *p, unsigned int *length, unsigned int size, uint8_t t,
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uint8_t v)
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{
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if ((*length + 2) >= size)
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return 1;
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((union gtpie_member *)(p + *length))->tv1.t = hton8(t);
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((union gtpie_member *)(p + *length))->tv1.v = hton8(v);
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*length += 2;
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return 0;
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}
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int gtpie_tv2(void *p, unsigned int *length, unsigned int size, uint8_t t,
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uint16_t v)
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{
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if ((*length + 3) >= size)
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return 1;
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((union gtpie_member *)(p + *length))->tv2.t = hton8(t);
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((union gtpie_member *)(p + *length))->tv2.v = hton16(v);
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*length += 3;
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return 0;
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}
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int gtpie_tv4(void *p, unsigned int *length, unsigned int size, uint8_t t,
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uint32_t v)
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{
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if ((*length + 5) >= size)
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return 1;
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((union gtpie_member *)(p + *length))->tv4.t = hton8(t);
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((union gtpie_member *)(p + *length))->tv4.v = hton32(v);
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*length += 5;
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return 0;
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}
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int gtpie_tv8(void *p, unsigned int *length, unsigned int size, uint8_t t,
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uint64_t v)
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{
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if ((*length + 9) >= size)
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return 1;
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((union gtpie_member *)(p + *length))->tv8.t = hton8(t);
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((union gtpie_member *)(p + *length))->tv8.v = hton64(v);
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*length += 9;
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return 0;
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}
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int gtpie_getie(union gtpie_member *ie[], int type, int instance)
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{
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int j;
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for (j = 0; j < GTPIE_SIZE; j++) {
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if ((ie[j] != 0) && (ie[j]->t == type)) {
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if (instance-- == 0)
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return j;
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}
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}
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return -1;
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}
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int gtpie_exist(union gtpie_member *ie[], int type, int instance)
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{
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int j;
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for (j = 0; j < GTPIE_SIZE; j++) {
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if ((ie[j] != 0) && (ie[j]->t == type)) {
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if (instance-- == 0)
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return 1;
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}
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}
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return 0;
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}
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int gtpie_gettlv(union gtpie_member *ie[], int type, int instance,
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unsigned int *length, void *dst, unsigned int size)
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{
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int ien;
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ien = gtpie_getie(ie, type, instance);
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if (ien >= 0) {
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*length = ntoh16(ie[ien]->tlv.l);
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if (*length <= size)
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memcpy(dst, ie[ien]->tlv.v, *length);
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else
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return EOF;
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}
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return 0;
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}
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int gtpie_gettv0(union gtpie_member *ie[], int type, int instance,
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void *dst, unsigned int size)
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{
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int ien;
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ien = gtpie_getie(ie, type, instance);
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if (ien >= 0)
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memcpy(dst, ie[ien]->tv0.v, size);
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else
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return EOF;
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return 0;
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}
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int gtpie_gettv1(union gtpie_member *ie[], int type, int instance,
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uint8_t * dst)
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{
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int ien;
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ien = gtpie_getie(ie, type, instance);
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if (ien >= 0)
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*dst = ntoh8(ie[ien]->tv1.v);
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else
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return EOF;
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return 0;
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}
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int gtpie_gettv2(union gtpie_member *ie[], int type, int instance,
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uint16_t * dst)
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{
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int ien;
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ien = gtpie_getie(ie, type, instance);
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if (ien >= 0)
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*dst = ntoh16(ie[ien]->tv2.v);
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else
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return EOF;
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return 0;
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}
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int gtpie_gettv4(union gtpie_member *ie[], int type, int instance,
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uint32_t * dst)
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{
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int ien;
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ien = gtpie_getie(ie, type, instance);
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if (ien >= 0)
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*dst = ntoh32(ie[ien]->tv4.v);
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else
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return EOF;
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return 0;
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}
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int gtpie_gettv8(union gtpie_member *ie[], int type, int instance,
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uint64_t * dst)
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{
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int ien;
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ien = gtpie_getie(ie, type, instance);
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if (ien >= 0)
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*dst = ntoh64(ie[ien]->tv8.v);
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else
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return EOF;
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return 0;
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}
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int gtpie_decaps(union gtpie_member *ie[], int version, void *pack,
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unsigned len)
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{
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int i;
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int j = 0;
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unsigned char *p;
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unsigned char *end;
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end = (unsigned char *)pack + len;
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p = pack;
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memset(ie, 0, sizeof(union gtpie_member *) * GTPIE_SIZE);
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while ((p < end) && (j < GTPIE_SIZE)) {
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if (GTPIE_DEBUG) {
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printf("The packet looks like this:\n");
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for (i = 0; i < (end - p); i++) {
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printf("%02x ",
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(unsigned char)*(char *)(p + i));
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if (!((i + 1) % 16))
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printf("\n");
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};
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printf("\n");
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}
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switch (*p) {
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case GTPIE_CAUSE: /* TV GTPIE types with value length 1 */
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case GTPIE_REORDER:
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case GTPIE_MAP_CAUSE:
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case GTPIE_MS_VALIDATED:
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case GTPIE_RECOVERY:
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case GTPIE_SELECTION_MODE:
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case GTPIE_TEARDOWN:
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case GTPIE_NSAPI:
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case GTPIE_RANAP_CAUSE:
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case GTPIE_RP_SMS:
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case GTPIE_RP:
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case GTPIE_MS_NOT_REACH:
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case GTPIE_BCM:
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf
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("GTPIE TV1 found. Type %d, value %d\n",
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ie[j]->tv1.t, ie[j]->tv1.v);
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p += 1 + 1;
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j++;
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}
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break;
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case GTPIE_FL_DI: /* TV GTPIE types with value length 2 or 4 */
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case GTPIE_FL_C:
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if (version != 0) {
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if (j < GTPIE_SIZE) { /* GTPIE_TEI_DI & GTPIE_TEI_C with length 4 */
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/* case GTPIE_TEI_DI: gtp1 */
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/* case GTPIE_TEI_C: gtp1 */
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf
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("GTPIE TV 4 found. Type %d, value %d\n",
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ie[j]->tv4.t,
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ie[j]->tv4.v);
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p += 1 + 4;
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j++;
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}
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break;
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}
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case GTPIE_PFI: /* TV GTPIE types with value length 2 */
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case GTPIE_CHARGING_C:
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case GTPIE_TRACE_REF:
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case GTPIE_TRACE_TYPE:
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf
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("GTPIE TV2 found. Type %d, value %d\n",
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ie[j]->tv2.t, ie[j]->tv2.v);
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p += 1 + 2;
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j++;
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}
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break;
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case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */
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case GTPIE_P_TMSI_S:
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf
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("GTPIE TV 3 found. Type %d, value %d, %d, %d\n",
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ie[j]->tv0.t, ie[j]->tv0.v[0],
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ie[j]->tv0.v[1], ie[j]->tv0.v[2]);
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p += 1 + 3;
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j++;
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}
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break;
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case GTPIE_TLLI: /* TV GTPIE types with value length 4 */
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case GTPIE_P_TMSI:
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case GTPIE_CHARGING_ID:
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/* case GTPIE_TEI_DI: Handled by GTPIE_FL_DI */
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/* case GTPIE_TEI_C: Handled by GTPIE_FL_DI */
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf
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("GTPIE TV 4 found. Type %d, value %d\n",
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ie[j]->tv4.t, ie[j]->tv4.v);
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p += 1 + 4;
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j++;
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}
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break;
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case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf("GTPIE TV 5 found. Type %d\n",
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ie[j]->tv0.t);
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p += 1 + 5;
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j++;
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}
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break;
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case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf("GTPIE TV 7 found. Type %d\n",
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ie[j]->tv0.t);
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p += 1 + 7;
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j++;
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}
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break;
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case GTPIE_IMSI: /* TV GTPIE types with value length 8 */
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf
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("GTPIE_IMSI - GTPIE TV 8 found. Type %d, value 0x%llx\n",
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ie[j]->tv0.t, ie[j]->tv8.v);
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p += 1 + 8;
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j++;
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}
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break;
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case GTPIE_RAI: /* TV GTPIE types with value length 6 */
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf
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("GTPIE_RAI - GTPIE TV 6 found. Type %d, value 0x%llx\n",
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ie[j]->tv0.t, ie[j]->tv8.v);
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p += 1 + 6;
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j++;
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}
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break;
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case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf("GTPIE TV 28 found. Type %d\n",
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ie[j]->tv0.t);
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p += 1 + 28;
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j++;
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}
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break;
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case GTPIE_EXT_HEADER_T: /* GTP extension header */
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf
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("GTPIE GTP extension header found. Type %d\n",
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ie[j]->ext.t);
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p += 2 + ntoh8(ie[j]->ext.l);
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j++;
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}
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break;
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case GTPIE_EUA: /* TLV GTPIE types with variable length */
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case GTPIE_MM_CONTEXT:
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case GTPIE_PDP_CONTEXT:
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case GTPIE_APN:
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case GTPIE_PCO:
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case GTPIE_GSN_ADDR:
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case GTPIE_MSISDN:
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case GTPIE_QOS_PROFILE:
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case GTPIE_AUTH_QUINTUP:
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case GTPIE_TFT:
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case GTPIE_TARGET_INF:
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case GTPIE_UTRAN_TRANS:
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case GTPIE_RAB_SETUP:
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case GTPIE_TRIGGER_ID:
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case GTPIE_OMC_ID:
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case GTPIE_CHARGING_ADDR:
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case GTPIE_RAT_TYPE:
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case GTPIE_USER_LOC:
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case GTPIE_MS_TZ:
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case GTPIE_IMEI_SV:
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case GTPIE_PRIVATE:
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if (j < GTPIE_SIZE) {
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ie[j] = (union gtpie_member *)p;
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if (GTPIE_DEBUG)
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printf("GTPIE TLV found. Type %d\n",
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ie[j]->tlv.t);
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p += 3 + ntoh16(ie[j]->tlv.l);
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j++;
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}
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break;
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default:
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if (GTPIE_DEBUG)
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printf("GTPIE something unknown. Type %d\n",
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*p);
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return EOF; /* We received something unknown */
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}
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}
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if (p == end) {
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if (GTPIE_DEBUG)
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printf("GTPIE normal return. %lx %lx\n",
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(unsigned long)p, (unsigned long)end);
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return 0; /* We landed at the end of the packet: OK */
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} else if (!(j < GTPIE_SIZE)) {
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if (GTPIE_DEBUG)
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printf("GTPIE too many elements.\n");
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return EOF; /* We received too many information elements */
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} else {
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if (GTPIE_DEBUG)
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printf("GTPIE exceeded end of packet. %lx %lx\n",
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(unsigned long)p, (unsigned long)end);
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return EOF; /* We exceeded the end of the packet: Error */
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}
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}
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int gtpie_encaps(union gtpie_member *ie[], void *pack, unsigned *len)
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{
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int i;
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unsigned char *p;
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unsigned char *end;
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int iesize;
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p = pack;
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memset(pack, 0, GTPIE_MAX);
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end = p + GTPIE_MAX;
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for (i = 1; i < GTPIE_SIZE; i++)
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if (ie[i] != 0) {
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if (GTPIE_DEBUG)
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printf("gtpie_encaps. Type %d\n", i);
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switch (i) {
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case GTPIE_CAUSE: /* TV GTPIE types with value length 1 */
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case GTPIE_REORDER:
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case GTPIE_MAP_CAUSE:
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case GTPIE_MS_VALIDATED:
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case GTPIE_RECOVERY:
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case GTPIE_SELECTION_MODE:
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case GTPIE_TEARDOWN:
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case GTPIE_NSAPI:
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case GTPIE_RANAP_CAUSE:
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case GTPIE_RP_SMS:
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case GTPIE_RP:
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case GTPIE_MS_NOT_REACH:
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case GTPIE_BCM:
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iesize = 2;
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break;
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case GTPIE_FL_DI: /* TV GTPIE types with value length 2 */
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case GTPIE_FL_C:
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case GTPIE_PFI:
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case GTPIE_CHARGING_C:
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case GTPIE_TRACE_REF:
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case GTPIE_TRACE_TYPE:
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iesize = 3;
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break;
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case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */
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case GTPIE_P_TMSI_S:
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iesize = 4;
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break;
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case GTPIE_TLLI: /* TV GTPIE types with value length 4 */
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case GTPIE_P_TMSI:
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/* case GTPIE_TEI_DI: only in gtp1 */
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/* case GTPIE_TEI_C: only in gtp1 */
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case GTPIE_CHARGING_ID:
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iesize = 5;
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break;
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case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */
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iesize = 6;
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break;
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case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */
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iesize = 8;
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break;
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case GTPIE_IMSI: /* TV GTPIE types with value length 8 */
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case GTPIE_RAI:
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iesize = 9;
|
|
break;
|
|
case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */
|
|
iesize = 29;
|
|
break;
|
|
case GTPIE_EXT_HEADER_T: /* GTP extension header */
|
|
iesize = 2 + hton8(ie[i]->ext.l);
|
|
break;
|
|
case GTPIE_EUA: /* TLV GTPIE types with length length 2 */
|
|
case GTPIE_MM_CONTEXT:
|
|
case GTPIE_PDP_CONTEXT:
|
|
case GTPIE_APN:
|
|
case GTPIE_PCO:
|
|
case GTPIE_GSN_ADDR:
|
|
case GTPIE_MSISDN:
|
|
case GTPIE_QOS_PROFILE:
|
|
case GTPIE_AUTH_QUINTUP:
|
|
case GTPIE_TFT:
|
|
case GTPIE_TARGET_INF:
|
|
case GTPIE_UTRAN_TRANS:
|
|
case GTPIE_RAB_SETUP:
|
|
case GTPIE_TRIGGER_ID:
|
|
case GTPIE_OMC_ID:
|
|
case GTPIE_CHARGING_ADDR:
|
|
case GTPIE_PRIVATE:
|
|
iesize = 3 + hton16(ie[i]->tlv.l);
|
|
break;
|
|
default:
|
|
return 2; /* We received something unknown */
|
|
}
|
|
if (p + iesize < end) {
|
|
memcpy(p, ie[i], iesize);
|
|
p += iesize;
|
|
*len += iesize;
|
|
} else
|
|
return 2; /* Out of space */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int gtpie_encaps2(union gtpie_member ie[], unsigned int size,
|
|
void *pack, unsigned *len)
|
|
{
|
|
unsigned int i, j;
|
|
unsigned char *p;
|
|
unsigned char *end;
|
|
int iesize;
|
|
|
|
p = pack;
|
|
|
|
memset(pack, 0, GTPIE_MAX);
|
|
end = p + GTPIE_MAX;
|
|
for (j = 0; j < GTPIE_SIZE; j++)
|
|
for (i = 0; i < size; i++)
|
|
if (ie[i].t == j) {
|
|
if (GTPIE_DEBUG)
|
|
printf
|
|
("gtpie_encaps. Number %d, Type %d\n",
|
|
i, ie[i].t);
|
|
switch (ie[i].t) {
|
|
case GTPIE_CAUSE: /* TV GTPIE types with value length 1 */
|
|
case GTPIE_REORDER:
|
|
case GTPIE_MAP_CAUSE:
|
|
case GTPIE_MS_VALIDATED:
|
|
case GTPIE_RECOVERY:
|
|
case GTPIE_SELECTION_MODE:
|
|
case GTPIE_TEARDOWN:
|
|
case GTPIE_NSAPI:
|
|
case GTPIE_RANAP_CAUSE:
|
|
case GTPIE_RP_SMS:
|
|
case GTPIE_RP:
|
|
case GTPIE_MS_NOT_REACH:
|
|
case GTPIE_BCM:
|
|
iesize = 2;
|
|
break;
|
|
case GTPIE_PFI: /* TV GTPIE types with value length 2 */
|
|
case GTPIE_CHARGING_C:
|
|
case GTPIE_TRACE_REF:
|
|
case GTPIE_TRACE_TYPE:
|
|
iesize = 3;
|
|
break;
|
|
case GTPIE_QOS_PROFILE0: /* TV GTPIE types with value length 3 */
|
|
case GTPIE_P_TMSI_S:
|
|
iesize = 4;
|
|
break;
|
|
case GTPIE_TLLI: /* TV GTPIE types with value length 4 */
|
|
case GTPIE_P_TMSI:
|
|
case GTPIE_TEI_DI:
|
|
case GTPIE_TEI_C:
|
|
iesize = 5;
|
|
break;
|
|
case GTPIE_TEI_DII: /* TV GTPIE types with value length 5 */
|
|
iesize = 6;
|
|
break;
|
|
case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 */
|
|
iesize = 8;
|
|
break;
|
|
case GTPIE_IMSI: /* TV GTPIE types with value length 8 */
|
|
case GTPIE_RAI:
|
|
iesize = 9;
|
|
break;
|
|
case GTPIE_AUTH_TRIPLET: /* TV GTPIE types with value length 28 */
|
|
iesize = 29;
|
|
break;
|
|
case GTPIE_EXT_HEADER_T: /* GTP extension header */
|
|
iesize = 2 + hton8(ie[i].ext.l);
|
|
break;
|
|
case GTPIE_CHARGING_ID: /* TLV GTPIE types with length length 2 */
|
|
case GTPIE_EUA:
|
|
case GTPIE_MM_CONTEXT:
|
|
case GTPIE_PDP_CONTEXT:
|
|
case GTPIE_APN:
|
|
case GTPIE_PCO:
|
|
case GTPIE_GSN_ADDR:
|
|
case GTPIE_MSISDN:
|
|
case GTPIE_QOS_PROFILE:
|
|
case GTPIE_AUTH_QUINTUP:
|
|
case GTPIE_TFT:
|
|
case GTPIE_TARGET_INF:
|
|
case GTPIE_UTRAN_TRANS:
|
|
case GTPIE_RAB_SETUP:
|
|
case GTPIE_TRIGGER_ID:
|
|
case GTPIE_OMC_ID:
|
|
case GTPIE_CHARGING_ADDR:
|
|
case GTPIE_PRIVATE:
|
|
iesize = 3 + hton16(ie[i].tlv.l);
|
|
break;
|
|
default:
|
|
return 2; /* We received something unknown */
|
|
}
|
|
if (p + iesize < end) {
|
|
memcpy(p, &ie[i], iesize);
|
|
p += iesize;
|
|
*len += iesize;
|
|
} else
|
|
return 2; /* Out of space */
|
|
}
|
|
return 0;
|
|
}
|