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open5gs/lib/gtp/v1/types.c

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/*
* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
* Copyright (C) 2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
*
* This file is part of Open5GS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "ogs-gtp.h"
/* 7.7.51 User Location Information (ULI) */
int16_t ogs_gtp1_parse_uli(ogs_gtp1_uli_t *uli, ogs_tlv_octet_t *octet)
{
ogs_gtp1_uli_t *source = (ogs_gtp1_uli_t *)octet->data;
int16_t size = 0;
ogs_assert(uli);
ogs_assert(octet);
memset(uli, 0, sizeof(ogs_gtp1_uli_t));
uli->geo_loc_type = source->geo_loc_type;
size++;
switch (uli->geo_loc_type) {
case OGS_GTP1_GEO_LOC_TYPE_CGI:
ogs_assert(size + sizeof(uli->cgi) <= octet->len);
memcpy(&uli->cgi,
(unsigned char *)octet->data + size, sizeof(uli->cgi));
uli->cgi.lac = be16toh(uli->cgi.lac);
uli->cgi.ci = be16toh(uli->cgi.ci);
size += sizeof(uli->cgi);
break;
case OGS_GTP1_GEO_LOC_TYPE_SAI:
ogs_assert(size + sizeof(uli->sai) <= octet->len);
memcpy(&uli->sai,
(unsigned char *)octet->data + size, sizeof(uli->sai));
uli->sai.lac = be16toh(uli->sai.lac);
uli->sai.sac = be16toh(uli->sai.sac);
size += sizeof(uli->sai);
break;
case OGS_GTP1_GEO_LOC_TYPE_RAI:
ogs_assert(size + sizeof(uli->rai) <= octet->len);
memcpy(&uli->rai,
(unsigned char *)octet->data + size, sizeof(uli->rai));
uli->rai.lac = be16toh(uli->rai.lac);
uli->rai.rac = be16toh(uli->rai.rac); //FIXME: Only the first octet (10) contains the RAC and the second octet (11) is coded as "11111111"
size += sizeof(uli->rai);
break;
default:
ogs_warn("Unknown Geographic Location Type 0x%x in User Location Information IE",
uli->geo_loc_type);
return 0;
}
ogs_assert(size == octet->len);
return size;
}
int16_t ogs_gtp1_build_uli(
ogs_tlv_octet_t *octet, ogs_gtp1_uli_t *uli, void *data, int data_len)
{
ogs_gtp1_uli_t target;
int16_t size = 0;
ogs_assert(uli);
ogs_assert(octet);
ogs_assert(data);
ogs_assert(data_len);
octet->data = data;
memcpy(&target, uli, sizeof(ogs_gtp1_uli_t));
ogs_assert(size + sizeof(target.geo_loc_type) <= data_len);
memcpy((unsigned char *)octet->data + size,
&target.geo_loc_type, sizeof(target.geo_loc_type));
size += sizeof(target.geo_loc_type);
if (target.geo_loc_type == OGS_GTP1_GEO_LOC_TYPE_CGI) {
ogs_assert(size + sizeof(target.cgi) <= data_len);
target.cgi.lac = htobe16(target.cgi.lac);
target.cgi.ci = htobe16(target.cgi.ci);
memcpy((unsigned char *)octet->data + size,
&target.cgi, sizeof(target.cgi));
size += sizeof(target.cgi);
}
if (target.geo_loc_type == OGS_GTP1_GEO_LOC_TYPE_SAI) {
ogs_assert(size + sizeof(target.sai) <= data_len);
target.sai.lac = htobe16(target.sai.lac);
target.sai.sac = htobe16(target.sai.sac);
memcpy((unsigned char *)octet->data + size,
&target.sai, sizeof(target.sai));
size += sizeof(target.sai);
}
if (target.geo_loc_type == OGS_GTP1_GEO_LOC_TYPE_RAI) {
ogs_assert(size + sizeof(target.rai) <= data_len);
target.rai.lac = htobe16(target.rai.lac);
target.rai.rac = htobe16(target.rai.rac); //FIXME: Only the first octet (10) contains the RAC and the second octet (11) is coded as "11111111"
memcpy((unsigned char *)octet->data + size,
&target.rai, sizeof(target.rai));
size += sizeof(target.rai);
}
octet->len = size;
return octet->len;
}
static uint32_t dec_mbr_kbps(uint8_t mbr_byte, const uint8_t *extended_mbr_byte, const uint8_t *extended2_mbr_byte)
{
uint8_t mbr, embr1, embr2;
mbr = mbr_byte;
embr1 = extended_mbr_byte ? *extended_mbr_byte : 0;
embr2 = extended2_mbr_byte ? *extended2_mbr_byte : 0;
if (mbr == 0)
return 0;
if (mbr == 0xff)
return UINT32_MAX;
if (mbr == 0xfe) { /* Check extended field */
if (extended_mbr_byte == NULL || embr1 == 0)
return 8640;
if (embr1 == 0xfa) { /* Check extended2 field */
if (extended2_mbr_byte == NULL || embr2 == 0)
return 256 * 1000;
if (embr2 == 0xf6)
return 10 * 1000 * 1000; /* TODO: check "extended quality of service" IE */
if (embr2 >= 0xa2 && embr2 <= 0xf6)
return (1500 + (embr2 - (0xa2 - 1)) * 100) * 1000;
if (embr2 >= 0x3e && embr2 <= 0xa1)
return (500 + (embr2 - (0x3e - 1)) * 10) * 1000;
return (256 + embr2 * 4) * 1000;
}
if (embr1 >= 0xbb && embr1 <= 0xfa)
return (128 + (embr1 - (0xbb - 1)) * 2) * 1000;
if (embr1 >= 0x4b && embr1 <= 0xba)
return (16 + (embr1 - (0x4b - 1)) * 1) * 1000;
return 8600 + embr1 * 100;
}
if (mbr & 0x80) {
mbr &= ~0x80;
return 576 + mbr_byte * 64;
}
if (mbr & 0x40) {
mbr &= ~0x40;
return 64 + mbr * 8;
}
return mbr;
}
static uint16_t dec_transfer_delay_ms(uint8_t transfer_delay_byte)
{
transfer_delay_byte &= 0x3f; /* 6 bits */
if (transfer_delay_byte <= 0x0f)
return transfer_delay_byte;
if (transfer_delay_byte <= 0x1f)
return 200 + (transfer_delay_byte - 0x10) * 50;
return 1000 + (transfer_delay_byte - 0x20) * 100;
}
/* TS 29.060 7.7.34 Quality of Service (QoS) Profile */
/* TS 24.008 10.5.6.5 Quality of service */
int16_t ogs_gtp1_parse_qos_profile(
ogs_gtp1_qos_profile_decoded_t *decoded, const ogs_tlv_octet_t *octet)
{
ogs_gtp1_qos_profile_t *source = (ogs_gtp1_qos_profile_t *)octet->data;
ogs_assert(decoded);
ogs_assert(octet);
memset(decoded, 0, sizeof(ogs_gtp1_qos_profile_decoded_t));
switch (octet->len) {
case 21: /* ARP + octet 3 + octet 3-22 */
decoded->bit_rate_uplink_extended2_present = true;
OGS_GNUC_FALLTHROUGH;
case 19: /* ARP + octet 3 + octet 3-20 */
decoded->bit_rate_downlink_extended2_present = true;
OGS_GNUC_FALLTHROUGH;
case 17: /* ARP + octet 3 + octet 3-18 */
decoded->bit_rate_uplink_extended_present = true;
OGS_GNUC_FALLTHROUGH;
case 15: /* ARP + octet 3 + octet 3-16 */
decoded->bit_rate_downlink_extended_present = true;
OGS_GNUC_FALLTHROUGH;
case 13: /* ARP + octet 3-14 */
decoded->data_octet14_present = true;
OGS_GNUC_FALLTHROUGH;
case 12: /* ARP + octet 3-13 */
decoded->data_octet6_to_13_present = true;
OGS_GNUC_FALLTHROUGH;
case 4: /* ARP + octet 3 + octet 4 + octet 5 */
break;
default:
ogs_warn("Qos Profile wrong length %u", octet->len);
return -1;
}
memcpy(&decoded->qos_profile, source, octet->len);
/* Calculate resulting MBRs in kbps: */
if (decoded->data_octet6_to_13_present) {
decoded->dec_transfer_delay = dec_transfer_delay_ms(source->data.transfer_delay);
decoded->dec_mbr_kbps_dl = dec_mbr_kbps(
source->data.max_bit_rate_downlink,
decoded->bit_rate_downlink_extended_present ?
&source->data.extended.max_bit_rate_downlink : NULL,
decoded->bit_rate_downlink_extended2_present ?
&source->data.extended2.max_bit_rate_downlink : NULL);
decoded->dec_mbr_kbps_ul = dec_mbr_kbps(
source->data.max_bit_rate_uplink,
decoded->bit_rate_uplink_extended_present ?
&source->data.extended.max_bit_rate_uplink : NULL,
decoded->bit_rate_uplink_extended2_present ?
&source->data.extended2.max_bit_rate_uplink : NULL);
/* GBR is encoded the same way as MBR: */
decoded->dec_gbr_kbps_dl = dec_mbr_kbps(
source->data.guaranteed_bit_rate_downlink,
decoded->bit_rate_downlink_extended_present ?
&source->data.extended.guaranteed_bit_rate_downlink : NULL,
decoded->bit_rate_downlink_extended2_present ?
&source->data.extended2.guaranteed_bit_rate_downlink : NULL);
decoded->dec_gbr_kbps_ul = dec_mbr_kbps(
source->data.guaranteed_bit_rate_uplink,
decoded->bit_rate_uplink_extended_present ?
&source->data.extended.guaranteed_bit_rate_uplink : NULL,
decoded->bit_rate_uplink_extended2_present ?
&source->data.extended2.guaranteed_bit_rate_uplink : NULL);
}
return octet->len;
}
static uint8_t enc_transfer_delay_ms(uint16_t transfer_delay_ms)
{
if (transfer_delay_ms >= 4000)
return 0x3e;
if (transfer_delay_ms >= 1000) {
transfer_delay_ms -= 1000;
return 0x20 + (transfer_delay_ms / 100);
}
if (transfer_delay_ms >= 200) {
transfer_delay_ms -= 200;
return 0x10 + (transfer_delay_ms / 50);
}
if (transfer_delay_ms > 150)
transfer_delay_ms = 150;
if (transfer_delay_ms >= 10)
return transfer_delay_ms / 10;
return 1; /* 0 is "Reserved" Network->MS */
}
#define CHECK_EXT1 0xfe
#define CHECK_EXT2 0xfa
static uint32_t enc_mbr_kbps(uint32_t mbr_kbps, uint8_t *mbr_byte, uint8_t *extended_mbr_byte, uint8_t *extended2_mbr_byte)
{
/* up to EXT2 byte: */
if (mbr_kbps > 10*1000*1000) {
*extended2_mbr_byte = 0xf6; /* TODO: need to set the real value somewhere else */
goto ret_check_ext2;
}
if (mbr_kbps >= 1600*1000) {
mbr_kbps -= 1500*1000;
*extended2_mbr_byte = 0xa1 + mbr_kbps/(100*1000);
goto ret_check_ext2;
}
if (mbr_kbps >= 510*1000) {
mbr_kbps -= 500*1000;
*extended2_mbr_byte = 0x2d + mbr_kbps/(10*1000);
goto ret_check_ext2;
}
if (mbr_kbps >= 260*1000) {
mbr_kbps -= 256*1000;
*extended2_mbr_byte = 0x00 + mbr_kbps/(4*1000);
goto ret_check_ext2;
}
/* up to EXT1 byte: */
if (mbr_kbps >= 130*1000) {
mbr_kbps -= 128*1000;
*extended_mbr_byte = 0xba + mbr_kbps/(2*1000);
goto ret_check_ext1;
}
if (mbr_kbps >= 17*1000) {
mbr_kbps -= 16*1000;
*extended_mbr_byte = 0x4a + mbr_kbps/(1*1000);
goto ret_check_ext1;
}
if (mbr_kbps >= 8700) {
mbr_kbps -= 8600;
*extended_mbr_byte = 0x00 + mbr_kbps/(100);
goto ret_check_ext1;
}
/* Only MBR byte: */
if (mbr_kbps >= 576) {
mbr_kbps -= 576;
*mbr_byte = 0x80 + mbr_kbps/(64);
goto ret_mbr;
}
if (mbr_kbps >= 64) {
mbr_kbps -= 64;
*mbr_byte = 0x40 + mbr_kbps/(8);
goto ret_mbr;
}
if (mbr_kbps > 0) {
*mbr_byte = mbr_kbps;
goto ret_mbr;
}
/* if (mbr_kpbs == 0) */
*mbr_byte = 0xff;
goto ret_mbr;
ret_check_ext2:
*extended_mbr_byte = CHECK_EXT2;
*mbr_byte = CHECK_EXT1;
return 2;
ret_check_ext1:
*extended2_mbr_byte = 0;
*mbr_byte = CHECK_EXT1;
return 1;
ret_mbr:
*extended2_mbr_byte = 0;
*extended_mbr_byte = 0;
return 0;
}
int16_t ogs_gtp1_build_qos_profile(ogs_tlv_octet_t *octet,
const ogs_gtp1_qos_profile_decoded_t *decoded, void *data, int data_len)
{
ogs_gtp1_qos_profile_t *target;
int mbr_extended_dl, mbr_extended_ul;
int gbr_extended_dl, gbr_extended_ul;
int extended_dl, extended_ul;
ogs_assert(octet);
ogs_assert(data);
ogs_assert((size_t)data_len >= sizeof(ogs_gtp1_qos_profile_t));
octet->data = data;
target = (ogs_gtp1_qos_profile_t *)octet->data;
/* First, copy the encoded buffer as it is: */
memcpy(target, &decoded->qos_profile, sizeof(ogs_gtp1_qos_profile_t));
/* Avoid setting Traffic Handling to 0=Reserved even if ignored based on
* Interactive/Background Traffic Class: */
if (target->data.traffic_handling_priority == 0)
target->data.traffic_handling_priority = 1;
/* Then, encode in the target position the decoded-provided fields: */
if (decoded->data_octet6_to_13_present)
target->data.transfer_delay = enc_transfer_delay_ms(decoded->dec_transfer_delay);
mbr_extended_dl = enc_mbr_kbps(decoded->dec_mbr_kbps_dl,
&target->data.max_bit_rate_downlink,
&target->data.extended.max_bit_rate_downlink,
&target->data.extended2.max_bit_rate_downlink);
mbr_extended_ul = enc_mbr_kbps(decoded->dec_mbr_kbps_ul,
&target->data.max_bit_rate_uplink,
&target->data.extended.max_bit_rate_uplink,
&target->data.extended2.max_bit_rate_uplink);
/* GBR is encoded the same way as MBR: */
gbr_extended_dl = enc_mbr_kbps(decoded->dec_gbr_kbps_dl,
&target->data.guaranteed_bit_rate_downlink,
&target->data.extended.guaranteed_bit_rate_downlink,
&target->data.extended2.guaranteed_bit_rate_downlink);
gbr_extended_ul = enc_mbr_kbps(decoded->dec_gbr_kbps_ul,
&target->data.guaranteed_bit_rate_uplink,
&target->data.extended.guaranteed_bit_rate_uplink,
&target->data.extended2.guaranteed_bit_rate_uplink);
extended_dl = ogs_max(mbr_extended_dl, gbr_extended_dl);
extended_ul = ogs_max(mbr_extended_ul, gbr_extended_ul);
/* Finally, set len based on the required octets to encode the fields: */
if (extended_ul == 2)
octet->len = 21;
else if (extended_dl == 2)
octet->len = 19;
else if (extended_ul == 1)
octet->len = 17;
else if (extended_dl == 1)
octet->len = 15;
else if (decoded->data_octet14_present)
octet->len = 13;
else if (decoded->data_octet6_to_13_present)
octet->len = 12;
else
octet->len = 6;
return octet->len;
}
/* 7.7.28 MM Context */
/* TODO: UMTS support, see Figure 41 and Figure 42. */
int ogs_gtp1_build_mm_context(ogs_gtp1_tlv_mm_context_t *octet,
const ogs_gtp1_mm_context_decoded_t *decoded, uint8_t *data, int data_len)
{
uint8_t *ptr = data;
unsigned int i;
uint16_t *len_ptr;
uint16_t val16;
ogs_assert(octet);
ogs_assert(data);
ogs_assert((size_t)data_len >= 1);
octet->data = data;
#define CHECK_SPACE_ERR(bytes) \
if ((ptr - data) + (bytes) > data_len) \
return OGS_ERROR
CHECK_SPACE_ERR(1);
*ptr++ = (decoded->gupii & 0x01) << 7 |
(decoded->ugipai & 0x01) << 6 |
(decoded->used_gprs_protection_algo & 0x07) << 3 |
(decoded->ksi & 0x07);
CHECK_SPACE_ERR(1);
*ptr++ = (decoded->sec_mode & 0x03) << 6 |
(decoded->num_vectors & 0x07) << 3 |
(decoded->sec_mode == OGS_GTP1_SEC_MODE_USED_CIPHER_VALUE_UMTS_KEY_AND_QUINTUPLETS ?
decoded->used_cipher & 0x07 : 0x07);
CHECK_SPACE_ERR(sizeof(decoded->ck));
memcpy(ptr, &decoded->ck[0], sizeof(decoded->ck));
ptr += sizeof(decoded->ck);
CHECK_SPACE_ERR(sizeof(decoded->ik));
memcpy(ptr, &decoded->ik[0], sizeof(decoded->ik));
ptr += sizeof(decoded->ik);
/* Quintuplet Length */
CHECK_SPACE_ERR(2);
len_ptr = (uint16_t *)ptr; /* will be filled later */
ptr += 2;
for (i = 0; i < decoded->num_vectors; i++) {
CHECK_SPACE_ERR(sizeof(decoded->auth_quintuplets[0]));
memcpy(ptr, &decoded->auth_quintuplets[i].rand, sizeof(decoded->auth_quintuplets[i].rand));
ptr += sizeof(decoded->auth_quintuplets[i].rand);
*ptr++ = decoded->auth_quintuplets[i].xres_len;
memcpy(ptr, &decoded->auth_quintuplets[i].xres[0], decoded->auth_quintuplets[i].xres_len);
ptr += decoded->auth_quintuplets[i].xres_len;
memcpy(ptr, &decoded->auth_quintuplets[i].ck, sizeof(decoded->auth_quintuplets[i].ck));
ptr += sizeof(decoded->auth_quintuplets[i].ck);
memcpy(ptr, &decoded->auth_quintuplets[i].ik, sizeof(decoded->auth_quintuplets[i].ik));
ptr += sizeof(decoded->auth_quintuplets[i].ik);
*ptr++ = decoded->auth_quintuplets[i].autn_len;
memcpy(ptr, &decoded->auth_quintuplets[i].autn[0], decoded->auth_quintuplets[i].autn_len);
ptr += decoded->auth_quintuplets[i].autn_len;
}
*len_ptr = htobe16(ptr - (((uint8_t *)len_ptr) + 2));
CHECK_SPACE_ERR(sizeof(decoded->drx_param));
memcpy(ptr, &decoded->drx_param, sizeof(decoded->drx_param));
ptr += sizeof(decoded->drx_param);
if (decoded->ms_network_capability_len != 0) {
/* MS Network Capability Length */
CHECK_SPACE_ERR(1 + decoded->ms_network_capability_len);
*ptr++ = decoded->ms_network_capability_len;
memcpy(ptr, &decoded->ms_network_capability, decoded->ms_network_capability_len);
ptr += decoded->ms_network_capability_len;
} else {
CHECK_SPACE_ERR(1);
*ptr++ = 0;
}
if (decoded->imeisv_len != 0) {
/* Container Len */
CHECK_SPACE_ERR(2);
val16 = htobe16(2 + decoded->imeisv_len);
memcpy(ptr, &val16, 2);
ptr += 2;
/* Container (Mobile Identity IMEISV), TS 29.060 Table 47A */
CHECK_SPACE_ERR(2 + decoded->imeisv_len);
*ptr++ = 0x23;
*ptr++ = decoded->imeisv_len; /* Length of mobile identity contents */
memcpy(ptr, &decoded->imeisv[0], decoded->imeisv_len);
ptr += decoded->imeisv_len;
} else {
/* Container Len */
CHECK_SPACE_ERR(2);
*ptr++ = 0;
*ptr++ = 0;
}
if (decoded->nrsrna) {
CHECK_SPACE_ERR(2);
*ptr++ = 1;
*ptr++ = 0x01;
}
octet->len = (ptr - data);
return OGS_OK;
#undef CHECK_SPACE_ERR
}
/* The format of EUA in PDP Context is not exactly the same for the entire EUA,
* hence a separate function is required to encode the value part of the address,
* instead of using regular ogs_gtp1_ip_to_eua(). */
static int enc_pdp_ctx_as_eua(uint8_t pdu_session_type, const ogs_ip_t *ip,
uint8_t *data, int data_len)
{
switch (pdu_session_type)
{
case OGS_PDU_SESSION_TYPE_IPV4:
if (!ip->ipv4) {
ogs_error("EUA type IPv4 but no IPv4 address available");
return OGS_ERROR;
}
if (data_len < OGS_IPV4_LEN)
return OGS_ERROR;
memcpy(data, &ip->addr, OGS_IPV4_LEN);
return OGS_IPV4_LEN;
case OGS_PDU_SESSION_TYPE_IPV6:
if (!ip->ipv6) {
ogs_error("EUA type IPv4 but no IPv6 address available");
return OGS_ERROR;
}
if (data_len < OGS_IPV6_LEN)
return OGS_ERROR;
memcpy(data, ip->addr6, OGS_IPV6_LEN);
return OGS_IPV6_LEN;
case OGS_PDU_SESSION_TYPE_IPV4V6:
if (ip->ipv4 && ip->ipv6) {
if (data_len < OGS_IPV4_LEN + OGS_IPV6_LEN)
return OGS_ERROR;
memcpy(data, &ip->addr, OGS_IPV4_LEN);
memcpy(data + OGS_IPV4_LEN, ip->addr6, OGS_IPV6_LEN);
return OGS_IPV4_LEN + OGS_IPV6_LEN;
} else if (ip->ipv4) {
if (data_len < OGS_IPV4_LEN)
return OGS_ERROR;
memcpy(data, &ip->addr, OGS_IPV4_LEN);
return OGS_IPV4_LEN;
} else if (ip->ipv6) {
if (data_len < OGS_IPV6_LEN)
return OGS_ERROR;
memcpy(data, ip->addr6, OGS_IPV6_LEN);
return OGS_IPV6_LEN;
} else {
ogs_error("EUA type IPv4 but no IPv4 nor IPv6 address available");
return OGS_ERROR;
}
break;
default:
ogs_error("Unexpected session type");
return OGS_ERROR;
}
return OGS_OK;
}
/* TS 29.060 7.7.29 PDP Context */
int ogs_gtp1_build_pdp_context(ogs_tlv_octet_t *octet,
const ogs_gtp1_pdp_context_decoded_t *decoded, uint8_t *data, int data_len)
{
uint8_t *ptr = data;
uint16_t val16;
uint32_t val32;
int rv;
ogs_tlv_octet_t qos_sub_tlv_unused;
ogs_assert(octet);
ogs_assert(data);
ogs_assert((size_t)data_len >= 1);
octet->data = data;
#define CHECK_SPACE_ERR(bytes) \
if ((ptr - data) + (bytes) > data_len) \
return OGS_ERROR
CHECK_SPACE_ERR(1);
*ptr++ = (decoded->ea << 7) | (decoded->vaa << 6) |
(decoded->asi << 5)| (decoded->order << 4) |
(decoded->nsapi & 0x0f);
CHECK_SPACE_ERR(1);
*ptr++ = (decoded->sapi & 0x0f);
/* Quality of Service Subscribed */
CHECK_SPACE_ERR(1 + OGS_GTP1_QOS_PROFILE_MAX_LEN);
rv = ogs_gtp1_build_qos_profile(&qos_sub_tlv_unused, &decoded->qos_sub,
ptr, (data + data_len) - (ptr + 1));
if (rv < 0)
return rv;
*ptr = rv;
ptr += 1 + rv;
/* Quality of Service Requested */
CHECK_SPACE_ERR(1 + OGS_GTP1_QOS_PROFILE_MAX_LEN);
rv = ogs_gtp1_build_qos_profile(&qos_sub_tlv_unused, &decoded->qos_req,
ptr, (data + data_len) - (ptr + 1));
if (rv < 0)
return rv;
*ptr = rv;
ptr += 1 + rv;
/* Quality of Service Negotiated */
CHECK_SPACE_ERR(1 + OGS_GTP1_QOS_PROFILE_MAX_LEN);
rv = ogs_gtp1_build_qos_profile(&qos_sub_tlv_unused, &decoded->qos_neg,
ptr, (data + data_len) - (ptr + 1));
if (rv < 0)
return rv;
*ptr = rv;
ptr += 1 + rv;
CHECK_SPACE_ERR(2);
val16 = htobe16(decoded->snd);
memcpy(ptr, &val16, 2);
ptr += 2;
CHECK_SPACE_ERR(2);
val16 = htobe16(decoded->snu);
memcpy(ptr, &val16, 2);
ptr += 2;
CHECK_SPACE_ERR(1);
*ptr++ = decoded->send_npdu_nr;
CHECK_SPACE_ERR(1);
*ptr++ = decoded->receive_npdu_nr;
CHECK_SPACE_ERR(4);
val32 = htobe32(decoded->ul_teic);
memcpy(ptr, &val32, 4);
ptr += 4;
CHECK_SPACE_ERR(4);
val32 = htobe32(decoded->ul_teid);
memcpy(ptr, &val32, 4);
ptr += 4;
CHECK_SPACE_ERR(1);
*ptr++ = decoded->pdp_ctx_id;
CHECK_SPACE_ERR(1);
*ptr++ = 0xf0 | decoded->pdp_type_org;
CHECK_SPACE_ERR(1);
*ptr++ = ogs_gtp1_pdu_session_type_to_eua_ietf_type(decoded->pdp_type_num[0]);
/* PDP Address Length filled after PDP Address */
CHECK_SPACE_ERR(1);
rv = enc_pdp_ctx_as_eua(decoded->pdp_type_num[0], &decoded->pdp_address[0],
ptr + 1, (data + data_len) - (ptr + 1));
if (rv < 0)
return rv;
*ptr = rv;
ptr += 1 + rv;
/* GGSN Address for control plane Length */
CHECK_SPACE_ERR(1);
*ptr = decoded->ggsn_address_c.ipv6 ? OGS_GTP_GSN_ADDRESS_IPV6_LEN : OGS_GTP_GSN_ADDRESS_IPV4_LEN;
CHECK_SPACE_ERR(1 + (*ptr));
memcpy(ptr + 1,
decoded->ggsn_address_c.ipv6 ?
(uint8_t *)decoded->ggsn_address_c.addr6 :
(uint8_t *)&decoded->ggsn_address_c.addr,
*ptr);
ptr += 1 + *ptr;
/* GGSN Address for User Traffic Length */
CHECK_SPACE_ERR(1);
*ptr = decoded->ggsn_address_u.ipv6 ? OGS_GTP_GSN_ADDRESS_IPV6_LEN : OGS_GTP_GSN_ADDRESS_IPV4_LEN;
CHECK_SPACE_ERR(1 + (*ptr));
memcpy(ptr + 1,
decoded->ggsn_address_u.ipv6 ?
(uint8_t *)decoded->ggsn_address_u.addr6 :
(uint8_t *)&decoded->ggsn_address_u.addr,
*ptr);
ptr += 1 + *ptr;
/* APN */
rv = strlen(decoded->apn);
CHECK_SPACE_ERR(1 + rv + 1);
*ptr = ogs_fqdn_build(
(char *)ptr + 1, decoded->apn, rv);
ptr += 1 + *ptr;
CHECK_SPACE_ERR(2);
*ptr++ = (decoded->trans_id >> 8) & 0x0f;
*ptr++ = decoded->trans_id & 0xff;
if (decoded->ea == OGS_GTP1_PDPCTX_EXT_EUA_YES) {
CHECK_SPACE_ERR(1);
*ptr++ = decoded->pdp_type_num[1];
/* PDP Address Length filled after PDP Address */
CHECK_SPACE_ERR(1);
rv = enc_pdp_ctx_as_eua(decoded->pdp_type_num[1], &decoded->pdp_address[1],
ptr + 1, (data + data_len) - (ptr + 1));
if (rv < 0)
return rv;
*ptr = rv;
ptr += 1 + rv;
}
octet->len = (ptr - data);
return OGS_OK;
#undef CHECK_SPACE_ERR
}
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