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/* Test routines for the BSSGP implementation in libosmogb
*
* (C) 2014 by sysmocom s.f.m.c. GmbH
* Author: Jacob Erlbeck <jerlbeck@sysmocom.de>
*
* Skeleton based on bssgp_fc_test.c
* (C) 2012 by Harald Welte <laforge@gnumonks.org>
*/
#undef _GNU_SOURCE
#define _GNU_SOURCE
#include <osmocom/core/application.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/prim.h>
#include <osmocom/gprs/gprs_bssgp.h>
#include <osmocom/gprs/gprs_ns.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h>
#include <unistd.h>
#include <netinet/ip.h>
#include <sys/socket.h>
#include <dlfcn.h>
#define BSS_NSEI 0x0b55
static struct osmo_prim_hdr last_oph = {0};
/* override */
ssize_t sendto(int sockfd, const void *buf, size_t len, int flags,
const struct sockaddr *dest_addr, socklen_t addrlen)
{
typedef ssize_t (*sendto_t)(int, const void *, size_t, int,
const struct sockaddr *, socklen_t);
static sendto_t real_sendto = NULL;
uint32_t dest_host = htonl(((struct sockaddr_in *)dest_addr)->sin_addr.s_addr);
if (!real_sendto)
real_sendto = dlsym(RTLD_NEXT, "sendto");
fprintf(stderr, "MESSAGE to 0x%08x, msg length %d\n%s\n",
dest_host, len, osmo_hexdump(buf, len));
return len;
}
/* override */
int gprs_ns_callback(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
struct msgb *msg, uint16_t bvci)
{
fprintf(stderr, "CALLBACK, event %d, msg length %d, bvci 0x%04x\n%s\n\n",
event, msgb_bssgp_len(msg), bvci,
osmo_hexdump(msgb_bssgph(msg), msgb_bssgp_len(msg)));
return 0;
}
int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx)
{
printf("BSSGP primitive, SAP %d, prim = %d, op = %d, msg = %s\n",
oph->sap, oph->primitive, oph->operation, msgb_hexdump(oph->msg));
last_oph.sap = oph->sap;
last_oph.primitive = oph->primitive;
last_oph.operation = oph->operation;
last_oph.msg = NULL;
return -1;
}
static void msgb_bssgp_send_and_free(struct msgb *msg)
{
msgb_nsei(msg) = BSS_NSEI;
bssgp_rcvmsg(msg);
msgb_free(msg);
}
static void send_bssgp_supend(enum bssgp_pdu_type pdu_type, uint32_t tlli)
{
struct msgb *msg = bssgp_msgb_alloc();
uint32_t tlli_be = htonl(tlli);
uint8_t rai[] = {0x0f, 0xf1, 0x80, 0x20, 0x37, 0x00};
msgb_v_put(msg, pdu_type);
msgb_tvlv_put(msg, BSSGP_IE_TLLI, sizeof(tlli_be), (uint8_t *)&tlli_be);
msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, sizeof(rai), &rai[0]);
msgb_bssgp_send_and_free(msg);
}
static void send_bssgp_resume(enum bssgp_pdu_type pdu_type, uint32_t tlli)
{
struct msgb *msg = bssgp_msgb_alloc();
uint32_t tlli_be = htonl(tlli);
uint8_t rai[] = {0x0f, 0xf1, 0x80, 0x20, 0x37, 0x00};
uint8_t suspend_ref = 1;
msgb_v_put(msg, pdu_type);
msgb_tvlv_put(msg, BSSGP_IE_TLLI, sizeof(tlli_be), (uint8_t *)&tlli_be);
msgb_tvlv_put(msg, BSSGP_IE_ROUTEING_AREA, sizeof(rai), &rai[0]);
msgb_tvlv_put(msg, BSSGP_IE_SUSPEND_REF_NR, 1, &suspend_ref);
msgb_bssgp_send_and_free(msg);
}
static void test_bssgp_suspend_resume(void)
{
const uint32_t tlli = 0xf0123456;
printf("----- %s START\n", __func__);
memset(&last_oph, 0, sizeof(last_oph));
send_bssgp_supend(BSSGP_PDUT_SUSPEND, tlli);
OSMO_ASSERT(last_oph.primitive == PRIM_BSSGP_GMM_SUSPEND);
send_bssgp_resume(BSSGP_PDUT_RESUME, tlli);
OSMO_ASSERT(last_oph.primitive == PRIM_BSSGP_GMM_RESUME);
printf("----- %s END\n", __func__);
}
static void send_bssgp_status(enum gprs_bssgp_cause cause, uint16_t *bvci)
{
struct msgb *msg = bssgp_msgb_alloc();
uint8_t cause_ = cause;
msgb_v_put(msg, BSSGP_PDUT_STATUS);
msgb_tvlv_put(msg, BSSGP_IE_CAUSE, 1, &cause_);
if (bvci) {
uint16_t bvci_ = htons(*bvci);
msgb_tvlv_put(msg, BSSGP_IE_BVCI, 2, (uint8_t *) &bvci_);
}
msgb_bssgp_send_and_free(msg);
}
static void test_bssgp_status(void)
{
uint16_t bvci;
printf("----- %s START\n", __func__);
send_bssgp_status(BSSGP_CAUSE_PROTO_ERR_UNSPEC, NULL);
OSMO_ASSERT(last_oph.primitive == PRIM_NM_STATUS);
/* Enforce prim != PRIM_NM_STATUS */
last_oph.primitive = PRIM_NM_LLC_DISCARDED;
bvci = 1234;
send_bssgp_status(BSSGP_CAUSE_UNKNOWN_BVCI, &bvci);
OSMO_ASSERT(last_oph.primitive == PRIM_NM_STATUS);
printf("----- %s END\n", __func__);
}
static void test_bssgp_bad_reset()
{
struct msgb *msg = bssgp_msgb_alloc();
uint16_t bvci_be = htons(2);
uint8_t cause = BSSGP_CAUSE_OML_INTERV;
msgb_v_put(msg, BSSGP_PDUT_BVC_RESET);
msgb_tvlv_put(msg, BSSGP_IE_BVCI, sizeof(bvci_be), (uint8_t *)&bvci_be);
msgb_tvlv_put(msg, BSSGP_IE_CAUSE, sizeof(cause), &cause);
msgb_bvci(msg) = 0xbad;
msgb_bssgp_send_and_free(msg);
}
static struct log_info info = {};
int main(int argc, char **argv)
{
struct sockaddr_in bss_peer= {0};
osmo_init_logging(&info);
log_set_use_color(osmo_stderr_target, 0);
log_set_print_filename(osmo_stderr_target, 0);
bssgp_nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
bss_peer.sin_family = AF_INET;
bss_peer.sin_port = htons(32000);
bss_peer.sin_addr.s_addr = htonl(0x7f0000ff);
gprs_ns_nsip_connect(bssgp_nsi, &bss_peer, BSS_NSEI, BSS_NSEI+1);
printf("===== BSSGP test START\n");
test_bssgp_suspend_resume();
test_bssgp_status();
test_bssgp_bad_reset();
printf("===== BSSGP test END\n\n");
exit(EXIT_SUCCESS);
}
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