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generate PCOs out of attributes v2

This commit is contained in:
Alexander Couzens 2024-02-23 01:46:50 +01:00
parent bd7f35860c
commit 90c86e3445
2 changed files with 83 additions and 31 deletions
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54
src/libcharon/plugins/osmo_epdg/osmo_epdg_ue.c
View File

@ -24,6 +24,7 @@
#include <utils/utils.h>
#include <utils/debug.h>
#include "pco.h"
#include "osmo_epdg_ue.h"
#include "osmo_epdg_utils.h"
@ -184,6 +185,14 @@ static int count_pcos(enumerator_t *enumerator)
return count;
}
static inline int encode_pco_req(char *data, enum pco_protocols pco_protocol)
{
struct pco_element pco = { .length = 0 };
pco.protocol_id = htons(pco_protocol);
memcpy(data, &pco, sizeof(struct pco_element));
return sizeof(struct pco_element);
}
#define MAX_PCO_LEN 251
METHOD(osmo_epdg_ue_t, get_pco, int,
@ -235,39 +244,22 @@ METHOD(osmo_epdg_ue_t, get_pco, int,
{
switch (entry->type)
{
case P_CSCF_IP6_ADDRESS:
/* uint16_t ID */
(*pco)[iter++] = 0x00;
(*pco)[iter++] = 0x01;
/* uint8_t len */
(*pco)[iter++] = 0x00;
break;
case INTERNAL_IP6_DNS:
/* uint16_t ID */
(*pco)[iter++] = 0x00;
(*pco)[iter++] = 0x03;
/* uint8_t len */
(*pco)[iter++] = 0x00;
break;
case P_CSCF_IP4_ADDRESS:
/* uint16_t ID */
(*pco)[iter++] = 0x00;
(*pco)[iter++] = 0x0c;
/* uint8_t len */
(*pco)[iter++] = 0x00;
break;
case INTERNAL_IP4_DNS:
/* uint16_t ID */
(*pco)[iter++] = 0x00;
(*pco)[iter++] = 0x0d;
/* uint8_t len */
(*pco)[iter++] = 0x00;
break;
default:
break;
case P_CSCF_IP6_ADDRESS:
iter += encode_pco_req(*pco + iter, PCO_P_PCSCF_ADDR);
break;
case INTERNAL_IP6_DNS:
iter += encode_pco_req(*pco + iter, PCO_P_DNS_IPv6_ADDR);
break;
case P_CSCF_IP4_ADDRESS:
iter += encode_pco_req(*pco + iter, PCO_P_PCSCF_IPv4_ADDR);
break;
case INTERNAL_IP4_DNS:
iter += encode_pco_req(*pco + iter, PCO_P_DNS_IPv4_ADDR);
break;
default:
break;
}
}
*pco_len = iter;
return 0;

60
src/libcharon/plugins/osmo_epdg/pco.h Normal file
View File

@ -0,0 +1,60 @@
/*
* Copyright (C) 2024 sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
* Author: Alexander Couzens <acouzens@sysmocom.de>
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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.
*
*/
/* from OsmoGGSN ./ggsn/pco.h under GPLv2 */
#include <stdint.h>
/* 3GPP TS 24.008 10.5.6.3 */
enum pco_protocols {
PCO_P_LCP = 0xC021,
PCO_P_PAP = 0xC023,
PCO_P_CHAP = 0xC223,
PCO_P_IPCP = 0x8021,
PCO_P_PCSCF_ADDR = 0x0001,
PCO_P_IM_CN_SS_F = 0x0002,
PCO_P_DNS_IPv6_ADDR = 0x0003,
PCO_P_POLICY_CTRL_REJ = 0x0004, /* only in Network->MS */
PCO_P_MS_SUP_NETREQ_BCI = 0x0005,
/* reserved */
PCO_P_DSMIPv6_HA_ADDR = 0x0007,
PCO_P_DSMIPv6_HN_PREF = 0x0008,
PCO_P_DSMIPv6_v4_HA_ADDR= 0x0009,
PCO_P_IP_ADDR_VIA_NAS = 0x000a, /* only MS->Network */
PCO_P_IPv4_ADDR_VIA_DHCP= 0x000b, /* only MS->Netowrk */
PCO_P_PCSCF_IPv4_ADDR = 0x000c,
PCO_P_DNS_IPv4_ADDR = 0x000d,
PCO_P_MSISDN = 0x000e,
PCO_P_IFOM_SUPPORT = 0x000f,
PCO_P_IPv4_LINK_MTU = 0x0010,
PCO_P_MS_SUPP_LOC_A_TFT = 0x0011,
PCO_P_PCSCF_RESEL_SUP = 0x0012, /* only MS->Network */
PCO_P_NBIFOM_REQ = 0x0013,
PCO_P_NBIFOM_MODE = 0x0014,
PCO_P_NONIP_LINK_MTU = 0x0015,
PCO_P_APN_RATE_CTRL_SUP = 0x0016,
PCO_P_PS_DATA_OFF_UE = 0x0017,
PCO_P_REL_DATA_SVC = 0x0018,
};
struct pco_element {
uint16_t protocol_id; /* network byte order */
uint8_t length; /* length of data below */
uint8_t data[0];
} __attribute__((packed));