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libosmocore/tests/gb/gprs_ns_test.c

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/* test routines for NS connection handling
* (C) 2013 by sysmocom - s.f.m.c. GmbH
* Author: Jacob Erlbeck <jerlbeck@sysmocom.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#undef _GNU_SOURCE
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h>
#include <dlfcn.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/application.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/signal.h>
#include <osmocom/core/rate_ctr.h>
#include <osmocom/gprs/gprs_msgb.h>
#include <osmocom/gprs/gprs_ns.h>
#include <osmocom/gprs/gprs_bssgp.h>
#define REMOTE_BSS_ADDR 0x01020304
#define REMOTE_SGSN_ADDR 0x05060708
#define SGSN_NSEI 0x0100
static int sent_pdu_type = 0;
static int gprs_process_message(struct gprs_ns_inst *nsi, const char *text,
struct sockaddr_in *peer, const unsigned char* data,
size_t data_len);
static void send_ns_reset(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
enum ns_cause cause, uint16_t nsvci, uint16_t nsei)
{
/* GPRS Network Service, PDU type: NS_RESET,
*/
unsigned char msg[12] = {
0x02, 0x00, 0x81, 0x01, 0x01, 0x82, 0x11, 0x22,
0x04, 0x82, 0x11, 0x22
};
msg[3] = cause;
msg[6] = nsvci / 256;
msg[7] = nsvci % 256;
msg[10] = nsei / 256;
msg[11] = nsei % 256;
gprs_process_message(nsi, "RESET", src_addr, msg, sizeof(msg));
}
static void send_ns_reset_ack(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
uint16_t nsvci, uint16_t nsei)
{
/* GPRS Network Service, PDU type: NS_RESET_ACK,
*/
unsigned char msg[9] = {
0x03, 0x01, 0x82, 0x11, 0x22,
0x04, 0x82, 0x11, 0x22
};
msg[3] = nsvci / 256;
msg[4] = nsvci % 256;
msg[7] = nsei / 256;
msg[8] = nsei % 256;
gprs_process_message(nsi, "RESET_ACK", src_addr, msg, sizeof(msg));
}
static void send_ns_alive(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr)
{
/* GPRS Network Service, PDU type: NS_ALIVE */
unsigned char msg[1] = {
0x0a
};
gprs_process_message(nsi, "ALIVE", src_addr, msg, sizeof(msg));
}
static void send_ns_alive_ack(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr)
{
/* GPRS Network Service, PDU type: NS_ALIVE_ACK */
unsigned char msg[1] = {
0x0b
};
gprs_process_message(nsi, "ALIVE_ACK", src_addr, msg, sizeof(msg));
}
static void send_ns_unblock(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr)
{
/* GPRS Network Service, PDU type: NS_UNBLOCK */
unsigned char msg[1] = {
0x06
};
gprs_process_message(nsi, "UNBLOCK", src_addr, msg, sizeof(msg));
}
static void send_ns_unblock_ack(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr)
{
/* GPRS Network Service, PDU type: NS_UNBLOCK_ACK */
unsigned char msg[1] = {
0x07
};
gprs_process_message(nsi, "UNBLOCK_ACK", src_addr, msg, sizeof(msg));
}
static void send_ns_unitdata(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
uint16_t nsbvci,
const unsigned char *bssgp_msg, size_t bssgp_msg_size)
{
/* GPRS Network Service, PDU type: NS_UNITDATA */
unsigned char msg[4096] = {
0x00, 0x00, 0x00, 0x00
};
OSMO_ASSERT(bssgp_msg_size <= sizeof(msg) - 4);
msg[2] = nsbvci / 256;
msg[3] = nsbvci % 256;
memcpy(msg + 4, bssgp_msg, bssgp_msg_size);
gprs_process_message(nsi, "UNITDATA", src_addr, msg, bssgp_msg_size + 4);
}
static void send_bssgp_reset(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
uint16_t bvci)
{
/* GPRS Network Service, PDU type: NS_UNITDATA, BVCI 0
* BSSGP RESET */
unsigned char msg[22] = {
0x22, 0x04, 0x82, 0x4a,
0x2e, 0x07, 0x81, 0x08, 0x08, 0x88, 0x10, 0x20,
0x30, 0x40, 0x50, 0x60, 0x10, 0x00
};
msg[3] = bvci / 256;
msg[4] = bvci % 256;
send_ns_unitdata(nsi, src_addr, 0, msg, sizeof(msg));
}
static void setup_ns(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
uint16_t nsvci, uint16_t nsei)
{
printf("Setup NS-VC: remote 0x%08x:%d, "
"NSVCI 0x%04x(%d), NSEI 0x%04x(%d)\n\n",
ntohl(src_addr->sin_addr.s_addr), ntohs(src_addr->sin_port),
nsvci, nsvci, nsei, nsei);
send_ns_reset(nsi, src_addr, NS_CAUSE_OM_INTERVENTION, nsvci, nsei);
send_ns_alive(nsi, src_addr);
send_ns_unblock(nsi, src_addr);
send_ns_alive_ack(nsi, src_addr);
}
static void setup_bssgp(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
uint16_t bvci) __attribute__((__unused__));
static void setup_bssgp(struct gprs_ns_inst *nsi, struct sockaddr_in *src_addr,
uint16_t bvci)
{
printf("Setup BSSGP: remote 0x%08x:%d, "
"BVCI 0x%04x(%d)\n\n",
ntohl(src_addr->sin_addr.s_addr), ntohs(src_addr->sin_port),
bvci, bvci);
send_bssgp_reset(nsi, src_addr, bvci);
}
/* GPRS Network Service, PDU type: NS_STATUS,
* Cause: PDU not compatible with the protocol state
* PDU: NS_ALIVE
*/
static const unsigned char gprs_ns_status_invalid_alive[7] = {
0x08, 0x00, 0x81, 0x0a, 0x02, 0x81, 0x0a
};
/* GPRS Network Service, PDU type: NS_UNITDATA, BVCI 0 */
static const unsigned char gprs_bssgp_reset[22] = {
0x00, 0x00, 0x00, 0x00, 0x22, 0x04, 0x82, 0x4a,
0x2e, 0x07, 0x81, 0x08, 0x08, 0x88, 0x10, 0x20,
0x30, 0x40, 0x50, 0x60, 0x10, 0x00
};
int gprs_ns_rcvmsg(struct gprs_ns_inst *nsi, struct msgb *msg,
struct sockaddr_in *saddr, enum gprs_ns_ll ll);
/* override */
int gprs_ns_callback(enum gprs_ns_evt event, struct gprs_nsvc *nsvc,
struct msgb *msg, uint16_t bvci)
{
printf("CALLBACK, event %d, msg length %td, bvci 0x%04x\n%s\n\n",
event, msgb_bssgp_len(msg), bvci,
osmo_hexdump(msgb_bssgph(msg), msgb_bssgp_len(msg)));
return 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");
sent_pdu_type = len > 0 ? ((uint8_t *)buf)[0] : -1;
if (dest_host == REMOTE_BSS_ADDR)
printf("MESSAGE to BSS, msg length %zu\n%s\n\n", len, osmo_hexdump(buf, len));
else if (dest_host == REMOTE_SGSN_ADDR)
printf("MESSAGE to SGSN, msg length %zu\n%s\n\n", len, osmo_hexdump(buf, len));
else
return real_sendto(sockfd, buf, len, flags, dest_addr, addrlen);
return len;
}
/* override */
int gprs_ns_sendmsg(struct gprs_ns_inst *nsi, struct msgb *msg)
{
typedef int (*gprs_ns_sendmsg_t)(struct gprs_ns_inst *nsi, struct msgb *msg);
static gprs_ns_sendmsg_t real_gprs_ns_sendmsg = NULL;
uint16_t bvci = msgb_bvci(msg);
uint16_t nsei = msgb_nsei(msg);
unsigned char *buf = msg->data;
size_t len = msg->len;
if (!real_gprs_ns_sendmsg)
real_gprs_ns_sendmsg = dlsym(RTLD_NEXT, "gprs_ns_sendmsg");
if (nsei == SGSN_NSEI)
printf("NS UNITDATA MESSAGE to SGSN, BVCI 0x%04x, msg length %zu\n%s\n\n",
bvci, len, osmo_hexdump(buf, len));
else
printf("NS UNITDATA MESSAGE to BSS, BVCI 0x%04x, msg length %zu\n%s\n\n",
bvci, len, osmo_hexdump(buf, len));
return real_gprs_ns_sendmsg(nsi, msg);
}
static void dump_rate_ctr_group(FILE *stream, const char *prefix,
struct rate_ctr_group *ctrg)
{
unsigned int i;
for (i = 0; i < ctrg->desc->num_ctr; i++) {
struct rate_ctr *ctr = &ctrg->ctr[i];
if (ctr->current && !strchr(ctrg->desc->ctr_desc[i].name, ':'))
fprintf(stream, " %s%s: %llu%s",
prefix, ctrg->desc->ctr_desc[i].description,
(long long)ctr->current,
"\n");
};
}
/* Signal handler for signals from NS layer */
static int test_signal(unsigned int subsys, unsigned int signal,
void *handler_data, void *signal_data)
{
struct ns_signal_data *nssd = signal_data;
if (subsys != SS_L_NS)
return 0;
switch (signal) {
case S_NS_RESET:
printf("==> got signal NS_RESET, NS-VC 0x%04x/%s\n",
nssd->nsvc->nsvci,
gprs_ns_ll_str(nssd->nsvc));
break;
case S_NS_ALIVE_EXP:
printf("==> got signal NS_ALIVE_EXP, NS-VC 0x%04x/%s\n",
nssd->nsvc->nsvci,
gprs_ns_ll_str(nssd->nsvc));
break;
case S_NS_BLOCK:
printf("==> got signal NS_BLOCK, NS-VC 0x%04x/%s\n",
nssd->nsvc->nsvci,
gprs_ns_ll_str(nssd->nsvc));
break;
case S_NS_UNBLOCK:
printf("==> got signal NS_UNBLOCK, NS-VC 0x%04x/%s\n",
nssd->nsvc->nsvci,
gprs_ns_ll_str(nssd->nsvc));
break;
case S_NS_REPLACED:
printf("==> got signal NS_REPLACED: 0x%04x/%s",
nssd->nsvc->nsvci,
gprs_ns_ll_str(nssd->nsvc));
printf(" -> 0x%04x/%s\n",
nssd->old_nsvc->nsvci,
gprs_ns_ll_str(nssd->old_nsvc));
break;
case S_NS_MISMATCH:
printf("==> got signal NS_MISMATCH: 0x%04x/%s pdu=%d, ie=%d\n",
nssd->nsvc->nsvci, gprs_ns_ll_str(nssd->nsvc),
nssd->pdu_type, nssd->ie_type);
break;
default:
printf("==> got signal %d, NS-VC 0x%04x/%s\n", signal,
nssd->nsvc->nsvci,
gprs_ns_ll_str(nssd->nsvc));
break;
}
return 0;
}
static int gprs_process_message(struct gprs_ns_inst *nsi, const char *text, struct sockaddr_in *peer, const unsigned char* data, size_t data_len)
{
struct msgb *msg;
int ret;
if (data_len > NS_ALLOC_SIZE - NS_ALLOC_HEADROOM) {
fprintf(stderr, "message too long: %zu\n", data_len);
return -1;
}
msg = gprs_ns_msgb_alloc();
memmove(msg->data, data, data_len);
msg->l2h = msg->data;
msgb_put(msg, data_len);
printf("PROCESSING %s from 0x%08x:%d\n%s\n\n",
text, ntohl(peer->sin_addr.s_addr), ntohs(peer->sin_port),
osmo_hexdump(data, data_len));
ret = gprs_ns_rcvmsg(nsi, msg, peer, GPRS_NS_LL_UDP);
printf("result (%s) = %d\n\n", text, ret);
msgb_free(msg);
return ret;
}
static int gprs_send_message(struct gprs_ns_inst *nsi, const char *text,
uint16_t nsei, uint16_t bvci,
const unsigned char* data, size_t data_len)
{
struct msgb *msg;
int ret;
if (data_len > NS_ALLOC_SIZE - NS_ALLOC_HEADROOM) {
fprintf(stderr, "message too long: %zu\n", data_len);
return -1;
}
msg = gprs_ns_msgb_alloc();
memmove(msg->data, data, data_len);
msg->l2h = msg->data;
msgb_put(msg, data_len);
msgb_nsei(msg) = nsei;
msgb_bvci(msg) = bvci;
printf("SENDING %s to NSEI 0x%04x, BVCI 0x%04x\n", text, nsei, bvci);
ret = gprs_ns_sendmsg(nsi, msg);
printf("result (%s) = %d\n\n", text, ret);
return ret;
}
static void gprs_dump_nsi(struct gprs_ns_inst *nsi)
{
struct gprs_nsvc *nsvc;
printf("Current NS-VCIs:\n");
llist_for_each_entry(nsvc, &nsi->gprs_nsvcs, list) {
struct sockaddr_in *peer = &(nsvc->ip.bts_addr);
printf(" VCI 0x%04x, NSEI 0x%04x, peer 0x%08x:%d, %s, %s, %s%s\n",
nsvc->nsvci, nsvc->nsei,
ntohl(peer->sin_addr.s_addr), ntohs(peer->sin_port),
NS_DESC_A(nsvc->state),
NS_DESC_B(nsvc->state),
NS_DESC_R(nsvc->state),
nsvc->nsvci_is_valid ? "" : ", invalid VCI"
);
dump_rate_ctr_group(stdout, " ", nsvc->ctrg);
}
printf("\n");
}
static int expire_nsvc_timer(struct gprs_nsvc *nsvc)
{
int rc;
if (!osmo_timer_pending(&nsvc->timer))
return -1;
rc = nsvc->timer_mode;
osmo_timer_del(&nsvc->timer);
nsvc->timer.cb(nsvc->timer.data);
return rc;
}
static void test_nsvc()
{
struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
struct sockaddr_in peer[1] = {{0},};
struct gprs_nsvc *nsvc;
int i;
peer[0].sin_family = AF_INET;
peer[0].sin_port = htons(1111);
peer[0].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
for (i=0; i<4; ++i) {
printf("--- Create via RESET (round %d) ---\n\n", i);
send_ns_reset(nsi, &peer[0], NS_CAUSE_OM_INTERVENTION,
0x1001, 0x1000);
gprs_dump_nsi(nsi);
printf("--- Delete nsvc object (round %d)---\n\n", i);
nsvc = gprs_nsvc_by_nsvci(nsi, 0x1001);
OSMO_ASSERT(nsvc != NULL);
gprs_nsvc_delete(nsvc);
gprs_dump_nsi(nsi);
}
gprs_ns_destroy(nsi);
nsi = NULL;
printf("--- Process timers ---\n\n");
/* wait for rate_ctr_timer expiry */
usleep(1100000);
/* ensure termination */
alarm(2);
osmo_timers_update();
alarm(0);
}
static void test_ignored_messages()
{
struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
struct sockaddr_in peer[1] = {{0},};
peer[0].sin_family = AF_INET;
peer[0].sin_port = htons(1111);
peer[0].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
printf("--- Send unexpected NS STATUS (should not be answered)---\n\n");
/* Do not respond, see 3GPP TS 08.16, 7.5.1 */
gprs_process_message(nsi, "STATUS", &peer[0],
gprs_ns_status_invalid_alive,
sizeof(gprs_ns_status_invalid_alive));
printf("--- Send unexpected NS ALIVE ACK (should not be answered)---\n\n");
/* Ignore this, see 3GPP TS 08.16, 7.4.1 */
send_ns_alive_ack(nsi, &peer[0]);
printf("--- Send unexpected NS RESET ACK (should not be answered)---\n\n");
/* Ignore this, see 3GPP TS 08.16, 7.3.1 */
send_ns_reset_ack(nsi, &peer[0], 0xe001, 0xe000);
gprs_ns_destroy(nsi);
nsi = NULL;
}
static void test_bss_port_changes()
{
struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
struct sockaddr_in peer[4] = {{0},};
peer[0].sin_family = AF_INET;
peer[0].sin_port = htons(1111);
peer[0].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
peer[1].sin_family = AF_INET;
peer[1].sin_port = htons(2222);
peer[1].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
peer[2].sin_family = AF_INET;
peer[2].sin_port = htons(3333);
peer[2].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
peer[3].sin_family = AF_INET;
peer[3].sin_port = htons(4444);
peer[3].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
printf("--- Setup, send BSSGP RESET ---\n\n");
setup_ns(nsi, &peer[0], 0x1122, 0x1122);
gprs_dump_nsi(nsi);
gprs_process_message(nsi, "BSSGP RESET", &peer[0],
gprs_bssgp_reset, sizeof(gprs_bssgp_reset));
printf("--- Peer port changes, RESET, message remains unchanged ---\n\n");
send_ns_reset(nsi, &peer[1], NS_CAUSE_OM_INTERVENTION, 0x1122, 0x1122);
gprs_dump_nsi(nsi);
printf("--- Peer port changes, RESET, VCI changes ---\n\n");
send_ns_reset(nsi, &peer[2], NS_CAUSE_OM_INTERVENTION, 0x3344, 0x1122);
gprs_dump_nsi(nsi);
printf("--- Peer port changes, RESET, NSEI changes ---\n\n");
send_ns_reset(nsi, &peer[3], NS_CAUSE_OM_INTERVENTION, 0x1122, 0x3344);
gprs_dump_nsi(nsi);
printf("--- Peer port 3333, RESET, VCI is changed back ---\n\n");
send_ns_reset(nsi, &peer[2], NS_CAUSE_OM_INTERVENTION, 0x1122, 0x1122);
gprs_dump_nsi(nsi);
printf("--- Peer port 4444, RESET, NSEI is changed back ---\n\n");
send_ns_reset(nsi, &peer[3], NS_CAUSE_OM_INTERVENTION, 0x1122, 0x1122);
gprs_dump_nsi(nsi);
gprs_ns_destroy(nsi);
nsi = NULL;
}
static void test_bss_reset_ack()
{
struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
struct sockaddr_in peer[4] = {{0},};
struct gprs_nsvc *nsvc;
struct sockaddr_in *nse[4];
int rc;
peer[0].sin_family = AF_INET;
peer[0].sin_port = htons(1111);
peer[0].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
peer[1].sin_family = AF_INET;
peer[1].sin_port = htons(2222);
peer[1].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
peer[2].sin_family = AF_INET;
peer[2].sin_port = htons(3333);
peer[2].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
peer[3].sin_family = AF_INET;
peer[3].sin_port = htons(4444);
peer[3].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR);
nse[0] = &peer[0];
nse[1] = &peer[1];
printf("--- Setup VC 1 BSS -> SGSN ---\n\n");
setup_ns(nsi, nse[0], 0x1001, 0x1000);
gprs_dump_nsi(nsi);
printf("--- Setup VC 2 BSS -> SGSN ---\n\n");
setup_ns(nsi, nse[1], 0x2001, 0x2000);
gprs_dump_nsi(nsi);
printf("--- Setup VC 1 SGSN -> BSS ---\n\n");
nsvc = gprs_nsvc_by_nsvci(nsi, 0x1001);
gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
send_ns_reset_ack(nsi, nse[0], 0x1001, 0x1000);
gprs_dump_nsi(nsi);
printf("--- Exchange NSEI 1 + 2 links ---\n\n");
nse[1] = &peer[0];
nse[0] = &peer[1];
printf("--- Setup VC 2 SGSN -> BSS (hits NSEI 1) ---\n\n");
nsvc = gprs_nsvc_by_nsvci(nsi, 0x2001);
gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
send_ns_reset_ack(nsi, nse[0], 0x1001, 0x1000);
gprs_dump_nsi(nsi);
printf("--- Setup VC 2 SGSN -> BSS (hits NSEI 2) ---\n\n");
nsvc = gprs_nsvc_by_nsvci(nsi, 0x2001);
rc = gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
OSMO_ASSERT(rc < 0);
printf("--- Setup VC 1 SGSN -> BSS (hits NSEI 1) ---\n\n");
nsvc = gprs_nsvc_by_nsvci(nsi, 0x1001);
gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
send_ns_reset_ack(nsi, nse[0], 0x1001, 0x1000);
gprs_dump_nsi(nsi);
printf("--- Setup VC 2 BSS -> SGSN ---\n\n");
setup_ns(nsi, nse[1], 0x2001, 0x2000);
gprs_dump_nsi(nsi);
/* Test 3GPP TS 08.16, 7.3.1, 3rd paragraph. */
/* This is not rejected because the NSEI has been
* assigned dynamically and not by configuration.
* This is not strictly spec conformant. */
printf("--- RESET with invalid NSEI, BSS -> SGSN ---\n\n");
send_ns_reset(nsi, nse[0], NS_CAUSE_OM_INTERVENTION,
0x1001, 0xf000);
gprs_dump_nsi(nsi);
/* Test 3GPP TS 08.16, 7.3.1, 2nd paragraph. */
/* This is not rejected because the NSEI has been
* assigned dynamically and not by configuration.
* This is not strictly spec conformant. */
printf("--- RESET with invalid NSVCI, BSS -> SGSN ---\n\n");
send_ns_reset(nsi, nse[0], NS_CAUSE_OM_INTERVENTION,
0xf001, 0x1000);
gprs_dump_nsi(nsi);
printf("--- RESET with old NSEI, NSVCI, BSS -> SGSN ---\n\n");
send_ns_reset(nsi, nse[0], NS_CAUSE_OM_INTERVENTION,
0x1001, 0x1000);
gprs_dump_nsi(nsi);
/* Test 3GPP TS 08.16, 7.3.1, 5th paragraph. */
printf("--- Unexpected RESET_ACK VC 1, BSS -> SGSN ---\n\n");
send_ns_reset_ack(nsi, nse[0], 0x1001, 0x1000);
gprs_dump_nsi(nsi);
/* Test 3GPP TS 08.16, 7.3.1, 4th paragraph. */
printf("--- RESET_ACK with invalid NSEI, BSS -> SGSN ---\n\n");
nsvc = gprs_nsvc_by_nsvci(nsi, 0x1001);
gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
send_ns_reset_ack(nsi, nse[0], 0x1001, 0xf000);
gprs_dump_nsi(nsi);
/* Test 3GPP TS 08.16, 7.3.1, 4th paragraph. */
printf("--- RESET_ACK with invalid NSVCI, BSS -> SGSN ---\n\n");
nsvc = gprs_nsvc_by_nsvci(nsi, 0x1001);
gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
send_ns_reset_ack(nsi, nse[0], 0xf001, 0x1000);
gprs_dump_nsi(nsi);
/* Test crossing RESET and UNBLOCK_ACK */
printf("--- RESET (BSS -> SGSN) crossing an UNBLOCK_ACK (SGSN -> BSS) ---\n\n");
setup_ns(nsi, nse[0], 0x1001, 0x1000);
nsvc = gprs_nsvc_by_nsvci(nsi, 0x1001);
gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
OSMO_ASSERT(nsvc->state & NSE_S_BLOCKED);
OSMO_ASSERT(nsvc->state & NSE_S_RESET);
send_ns_unblock_ack(nsi, nse[0]);
gprs_dump_nsi(nsi);
send_ns_reset_ack(nsi, nse[0], 0x1001, 0x1000);
expire_nsvc_timer(nsvc);
OSMO_ASSERT(nsvc->state & NSE_S_BLOCKED);
OSMO_ASSERT(nsvc->state & NSE_S_RESET);
send_ns_reset_ack(nsi, nse[0], 0x1001, 0x1000);
gprs_dump_nsi(nsi);
gprs_ns_destroy(nsi);
nsi = NULL;
}
static void test_sgsn_reset()
{
struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
struct sockaddr_in sgsn_peer= {0};
struct gprs_nsvc *nsvc;
sgsn_peer.sin_family = AF_INET;
sgsn_peer.sin_port = htons(32000);
sgsn_peer.sin_addr.s_addr = htonl(REMOTE_SGSN_ADDR);
gprs_dump_nsi(nsi);
printf("--- Setup SGSN connection, BSS -> SGSN ---\n\n");
gprs_ns_nsip_connect(nsi, &sgsn_peer, SGSN_NSEI, SGSN_NSEI+1);
send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, SGSN_NSEI);
send_ns_alive_ack(nsi, &sgsn_peer);
send_ns_unblock_ack(nsi, &sgsn_peer);
gprs_dump_nsi(nsi);
printf("--- RESET, SGSN -> BSS ---\n\n");
send_ns_reset(nsi, &sgsn_peer, NS_CAUSE_OM_INTERVENTION,
SGSN_NSEI+1, SGSN_NSEI);
gprs_dump_nsi(nsi);
/* Test 3GPP TS 08.16, 7.3.1, 3rd paragraph. */
printf("--- RESET with invalid NSEI, SGSN -> BSS ---\n\n");
send_ns_reset(nsi, &sgsn_peer, NS_CAUSE_OM_INTERVENTION,
SGSN_NSEI+1, 0xf000);
gprs_dump_nsi(nsi);
/* Test 3GPP TS 08.16, 7.3.1, 2nd paragraph. */
printf("--- RESET with invalid NSVCI, SGSN -> BSS ---\n\n");
send_ns_reset(nsi, &sgsn_peer, NS_CAUSE_OM_INTERVENTION,
0xf001, SGSN_NSEI);
gprs_dump_nsi(nsi);
printf("--- RESET, SGSN -> BSS ---\n\n");
send_ns_reset(nsi, &sgsn_peer, NS_CAUSE_OM_INTERVENTION,
SGSN_NSEI+1, SGSN_NSEI);
gprs_dump_nsi(nsi);
/* Test 3GPP TS 08.16, 7.3.1, 5th paragraph. */
printf("--- Unexpected RESET_ACK VC 1, BSS -> SGSN ---\n\n");
send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, SGSN_NSEI);
gprs_dump_nsi(nsi);
/* Test 3GPP TS 08.16, 7.3.1, 4th paragraph. */
printf("--- RESET_ACK with invalid NSEI, BSS -> SGSN ---\n\n");
nsvc = gprs_nsvc_by_nsvci(nsi, SGSN_NSEI+1);
gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, 0xe000);
gprs_dump_nsi(nsi);
/* Test 3GPP TS 08.16, 7.3.1, 4th paragraph. */
printf("--- RESET_ACK with invalid NSVCI, BSS -> SGSN ---\n\n");
nsvc = gprs_nsvc_by_nsvci(nsi, SGSN_NSEI+1);
gprs_nsvc_reset(nsvc, NS_CAUSE_OM_INTERVENTION);
send_ns_reset_ack(nsi, &sgsn_peer, 0xe001, SGSN_NSEI);
gprs_dump_nsi(nsi);
gprs_ns_destroy(nsi);
nsi = NULL;
}
static void test_sgsn_reset_invalid_state()
{
struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
struct sockaddr_in sgsn_peer= {0};
struct gprs_nsvc *nsvc;
int retry;
uint8_t dummy_sdu[] = {0x01, 0x02, 0x03, 0x04};
sgsn_peer.sin_family = AF_INET;
sgsn_peer.sin_port = htons(32000);
sgsn_peer.sin_addr.s_addr = htonl(REMOTE_SGSN_ADDR);
gprs_dump_nsi(nsi);
printf("=== %s ===\n", __func__);
printf("--- Setup SGSN connection, BSS -> SGSN ---\n\n");
gprs_ns_nsip_connect(nsi, &sgsn_peer, SGSN_NSEI, SGSN_NSEI+1);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_RESET);
send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, SGSN_NSEI);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_ALIVE);
send_ns_alive_ack(nsi, &sgsn_peer);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_UNBLOCK);
send_ns_unblock_ack(nsi, &sgsn_peer);
gprs_dump_nsi(nsi);
nsvc = gprs_nsvc_by_nsvci(nsi, SGSN_NSEI+1);
OSMO_ASSERT(nsvc->state == NSE_S_ALIVE);
OSMO_ASSERT(nsvc->remote_state == NSE_S_ALIVE);
printf("--- Time out local test procedure ---\n\n");
OSMO_ASSERT(expire_nsvc_timer(nsvc) == NSVC_TIMER_TNS_TEST);
OSMO_ASSERT(expire_nsvc_timer(nsvc) == NSVC_TIMER_TNS_ALIVE);
for (retry = 1; retry <= nsi->timeout[NS_TOUT_TNS_ALIVE_RETRIES]; ++retry)
OSMO_ASSERT(expire_nsvc_timer(nsvc) == NSVC_TIMER_TNS_ALIVE);
OSMO_ASSERT(nsvc->state == NSE_S_BLOCKED);
printf("--- Remote test procedure continues ---\n\n");
send_ns_alive(nsi, &sgsn_peer);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_RESET);
printf("--- Don't send a NS_RESET_ACK message (pretend it is lost) ---\n\n");
sent_pdu_type = -1;
send_ns_alive(nsi, &sgsn_peer);
OSMO_ASSERT(sent_pdu_type == -1);
send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, SGSN_NSEI);
OSMO_ASSERT(sent_pdu_type == NS_PDUT_ALIVE);
send_ns_alive_ack(nsi, &sgsn_peer);
OSMO_ASSERT(nsvc->state == (NSE_S_ALIVE | NSE_S_BLOCKED));
OSMO_ASSERT(nsvc->remote_state == (NSE_S_ALIVE | NSE_S_BLOCKED));
OSMO_ASSERT(sent_pdu_type == NS_PDUT_UNBLOCK);
send_ns_unblock_ack(nsi, &sgsn_peer);
OSMO_ASSERT(nsvc->state == NSE_S_ALIVE);
OSMO_ASSERT(nsvc->remote_state == NSE_S_ALIVE);
send_ns_unitdata(nsi, &sgsn_peer, 0x1234, dummy_sdu, sizeof(dummy_sdu));
gprs_ns_destroy(nsi);
nsi = NULL;
}
static void test_sgsn_output()
{
struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL);
struct sockaddr_in sgsn_peer= {0};
sgsn_peer.sin_family = AF_INET;
sgsn_peer.sin_port = htons(32000);
sgsn_peer.sin_addr.s_addr = htonl(REMOTE_SGSN_ADDR);
gprs_dump_nsi(nsi);
printf("--- Send message to SGSN ---\n\n");
gprs_send_message(nsi, "BSSGP RESET", SGSN_NSEI, 0,
gprs_bssgp_reset+4, sizeof(gprs_bssgp_reset)-4);
printf("--- Setup dead connection to SGSN ---\n\n");
gprs_ns_nsip_connect(nsi, &sgsn_peer, SGSN_NSEI, SGSN_NSEI+1);
gprs_dump_nsi(nsi);
printf("--- Send message to SGSN ---\n\n");
gprs_send_message(nsi, "BSSGP RESET", SGSN_NSEI, 0,
gprs_bssgp_reset+4, sizeof(gprs_bssgp_reset)-4);
printf("--- Make connection to SGSN alive ---\n\n");
send_ns_reset_ack(nsi, &sgsn_peer, SGSN_NSEI+1, SGSN_NSEI);
send_ns_alive_ack(nsi, &sgsn_peer);
gprs_dump_nsi(nsi);
printf("--- Send message to SGSN ---\n\n");
gprs_send_message(nsi, "BSSGP RESET", SGSN_NSEI, 0,
gprs_bssgp_reset+4, sizeof(gprs_bssgp_reset)-4);
printf("--- Unblock connection to SGSN ---\n\n");
send_ns_unblock_ack(nsi, &sgsn_peer);
send_ns_alive(nsi, &sgsn_peer);
gprs_dump_nsi(nsi);
printf("--- Send message to SGSN ---\n\n");
gprs_send_message(nsi, "BSSGP RESET", SGSN_NSEI, 0,
gprs_bssgp_reset+4, sizeof(gprs_bssgp_reset)-4);
printf("--- Send empty message with BVCI to SGSN ---\n\n");
gprs_send_message(nsi, "[empty]", SGSN_NSEI, 0x0102,
gprs_bssgp_reset, 0);
gprs_ns_destroy(nsi);
nsi = NULL;
}
int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx)
{
return -1;
}
static struct log_info info = {};
int main(int argc, char **argv)
{
void *ctx = talloc_named_const(NULL, 0, "gprs_ns_test");
osmo_init_logging2(ctx, &info);
log_set_use_color(osmo_stderr_target, 0);
log_set_print_filename(osmo_stderr_target, 0);
osmo_signal_register_handler(SS_L_NS, &test_signal, NULL);
log_set_print_filename(osmo_stderr_target, 0);
log_set_log_level(osmo_stderr_target, LOGL_INFO);
setlinebuf(stdout);
printf("===== NS protocol test START\n");
test_nsvc();
test_ignored_messages();
test_bss_port_changes();
test_bss_reset_ack();
test_sgsn_reset();
test_sgsn_reset_invalid_state();
test_sgsn_output();
printf("===== NS protocol test END\n\n");
exit(EXIT_SUCCESS);
}
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