diff options
Diffstat (limited to 'openbsc/tests/gbproxy/gbproxy_test.c')
-rw-r--r-- | openbsc/tests/gbproxy/gbproxy_test.c | 409 |
1 files changed, 409 insertions, 0 deletions
diff --git a/openbsc/tests/gbproxy/gbproxy_test.c b/openbsc/tests/gbproxy/gbproxy_test.c new file mode 100644 index 000000000..6e7be64b3 --- /dev/null +++ b/openbsc/tests/gbproxy/gbproxy_test.c @@ -0,0 +1,409 @@ +/* test routines for gbproxy + * send NS messages to the gbproxy and dumps what happens + * (C) 2013 by sysmocom s.f.m.c. GmbH + * Author: Jacob Erlbeck <jerlbeck@sysmocom.de> + */ + +#undef _GNU_SOURCE +#define _GNU_SOURCE + +#include <stdio.h> +#include <stdlib.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> + +#include <openbsc/gb_proxy.h> + +#define REMOTE_BSS_ADDR 0x01020304 +#define REMOTE_SGSN_ADDR 0x05060708 + +#define SGSN_NSEI 0xfffe + +struct gbproxy_config gbcfg; + +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_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_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) +{ + 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); +} + +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 %d, bvci 0x%04x\n%s\n\n", + event, msgb_bssgp_len(msg), bvci, + osmo_hexdump(msgb_bssgph(msg), msgb_bssgp_len(msg))); + + switch (event) { + case GPRS_NS_EVT_UNIT_DATA: + return gbprox_rcvmsg(msg, nsvc, bvci); + default: + break; + } + 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"); + + if (dest_host == REMOTE_BSS_ADDR) + printf("MESSAGE to BSS, msg length %d\n%s\n\n", len, osmo_hexdump(buf, len)); + else if (dest_host == REMOTE_SGSN_ADDR) + printf("MESSAGE to SGSN, msg length %d\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) +{ + uint16_t bvci = msgb_bvci(msg); + uint16_t nsei = msgb_nsei(msg); + + unsigned char *buf = msg->data; + size_t len = msg->len; + + if (nsei == SGSN_NSEI) + printf("NS UNITDATA MESSAGE to SGSN, BVCI 0x%04x, msg length %d\n%s\n\n", + bvci, len, osmo_hexdump(buf, len)); + else + printf("NS UNITDATA MESSAGE to BSS, BVCI 0x%04x, msg length %d\n%s\n\n", + bvci, len, osmo_hexdump(buf, len)); + + return 0; +} + +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; + int rc; + + 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; + + default: + printf("==> got signal %d, NS-VC 0x%04x/%s\n", signal, + nssd->nsvc->nsvci, + gprs_ns_ll_str(nssd->nsvc)); + break; + } + printf("\n"); + rc = gbprox_signal(subsys, signal, handler_data, signal_data); + return rc; +} + +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: %d\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 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\n", + nsvc->nsvci, nsvc->nsei, + ntohl(peer->sin_addr.s_addr), ntohs(peer->sin_port) + ); + dump_rate_ctr_group(stdout, " ", nsvc->ctrg); + } + printf("\n"); +} + +static void test_gbproxy() +{ + struct gprs_ns_inst *nsi = gprs_ns_instantiate(gprs_ns_callback, NULL); + struct sockaddr_in bss_peer[4] = {{0},}; + + bssgp_nsi = nsi; + gbcfg.nsi = bssgp_nsi; + gbcfg.nsip_sgsn_nsei = SGSN_NSEI; + + bss_peer[0].sin_family = AF_INET; + bss_peer[0].sin_port = htons(1111); + bss_peer[0].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR); + bss_peer[1].sin_family = AF_INET; + bss_peer[1].sin_port = htons(2222); + bss_peer[1].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR); + bss_peer[2].sin_family = AF_INET; + bss_peer[2].sin_port = htons(3333); + bss_peer[2].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR); + bss_peer[3].sin_family = AF_INET; + bss_peer[3].sin_port = htons(4444); + bss_peer[3].sin_addr.s_addr = htonl(REMOTE_BSS_ADDR); + + printf("--- Initialise BSS 1 ---\n\n"); + + setup_ns(nsi, &bss_peer[0], 0x1001, 0x1000); + setup_bssgp(nsi, &bss_peer[0], 0x1002); + gprs_dump_nsi(nsi); + gbprox_dump_peers(stdout, 0); + + printf("--- Initialise BSS 2 ---\n\n"); + + setup_ns(nsi, &bss_peer[1], 0x2001, 0x2000); + setup_bssgp(nsi, &bss_peer[1], 0x2002); + gprs_dump_nsi(nsi); + gbprox_dump_peers(stdout, 0); + + printf("--- Move BSS 1 to new port ---\n\n"); + + setup_ns(nsi, &bss_peer[2], 0x1001, 0x1000); + gprs_dump_nsi(nsi); + gbprox_dump_peers(stdout, 0); + + printf("--- Move BSS 2 to former BSS 1 port ---\n\n"); + + setup_ns(nsi, &bss_peer[0], 0x2001, 0x2000); + gprs_dump_nsi(nsi); + gbprox_dump_peers(stdout, 0); + + printf("--- Move BSS 1 to current BSS 2 port ---\n\n"); + + setup_ns(nsi, &bss_peer[0], 0x2001, 0x2000); + gprs_dump_nsi(nsi); + gbprox_dump_peers(stdout, 0); + + printf("--- Move BSS 2 to new port ---\n\n"); + + setup_ns(nsi, &bss_peer[3], 0x2001, 0x2000); + gprs_dump_nsi(nsi); + gbprox_dump_peers(stdout, 0); + + printf("--- Move BSS 2 to former BSS 1 port ---\n\n"); + + setup_ns(nsi, &bss_peer[2], 0x2001, 0x2000); + gprs_dump_nsi(nsi); + gbprox_dump_peers(stdout, 0); + + gprs_ns_destroy(nsi); + nsi = NULL; +} + + +static struct log_info info = {}; + +int main(int argc, char **argv) +{ + osmo_init_logging(&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); + + printf("===== NS protocol test START\n"); + test_gbproxy(); + printf("===== NS protocol test END\n\n"); + + exit(EXIT_SUCCESS); +} |