270 lines
6.3 KiB
C
270 lines
6.3 KiB
C
#include <stdio.h>
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#include <signal.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/abis/abis.h>
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#include <osmocom/abis/e1_input.h>
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#include <osmocom/core/application.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/gsm/protocol/gsm_12_21.h>
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static void *tall_test;
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static struct e1inp_sign_link *oml_sign_link, *rsl_sign_link;
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#define DBSCTEST 0
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struct log_info_cat bsc_test_cat[] = {
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[DBSCTEST] = {
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.name = "DBSCTEST",
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.description = "BSC-mode test",
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.color = "\033[1;35m",
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.enabled = 1, .loglevel = LOGL_NOTICE,
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},
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};
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static struct e1inp_sign_link *
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sign_link_up(void *dev, struct e1inp_line *line, enum e1inp_sign_type type)
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{
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struct e1inp_sign_link *sign_link = NULL;
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struct e1inp_line *oml_line;
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switch(type) {
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case E1INP_SIGN_OML:
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LOGP(DBSCTEST, LOGL_NOTICE, "OML link up request received.\n");
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e1inp_ts_config_sign(&line->ts[E1INP_SIGN_OML - 1], line);
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sign_link = oml_sign_link =
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e1inp_sign_link_create(&line->ts[E1INP_SIGN_OML - 1],
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E1INP_SIGN_OML, NULL, 255, 0);
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break;
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case E1INP_SIGN_RSL:
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if (!oml_sign_link) {
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LOGP(DBSCTEST, LOGL_ERROR, "OML link not yet set, "
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"giving up\n");
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return NULL;
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}
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LOGP(DBSCTEST, LOGL_NOTICE, "RSL link up request received.\n");
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/* We have to use the same line that the OML link. */
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oml_line = oml_sign_link->ts->line;
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e1inp_ts_config_sign(&oml_line->ts[E1INP_SIGN_RSL - 1],
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oml_line);
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sign_link = rsl_sign_link =
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e1inp_sign_link_create(&oml_line->ts[E1INP_SIGN_RSL - 1],
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E1INP_SIGN_RSL, NULL, 0, 0);
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break;
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default:
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break;
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}
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if (sign_link)
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LOGP(DBSCTEST, LOGL_NOTICE, "signal link has been set up.\n");
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return sign_link;
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}
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static void sign_link_down(struct e1inp_line *line)
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{
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LOGP(DBSCTEST, LOGL_NOTICE, "signal link has been closed\n");
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if (oml_sign_link) {
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e1inp_sign_link_destroy(oml_sign_link);
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oml_sign_link = NULL;
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}
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if (rsl_sign_link) {
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e1inp_sign_link_destroy(rsl_sign_link);
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rsl_sign_link = NULL;
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}
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}
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static void fill_om_hdr(struct abis_om_hdr *oh, uint8_t len)
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{
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oh->mdisc = ABIS_OM_MDISC_FOM;
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oh->placement = ABIS_OM_PLACEMENT_ONLY;
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oh->sequence = 0;
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oh->length = len;
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}
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static void fill_om_fom_hdr(struct abis_om_hdr *oh, uint8_t len,
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uint8_t msg_type, uint8_t obj_class,
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uint8_t bts_nr, uint8_t trx_nr, uint8_t ts_nr)
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{
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struct abis_om_fom_hdr *foh =
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(struct abis_om_fom_hdr *) oh->data;
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fill_om_hdr(oh, len+sizeof(*foh));
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foh->msg_type = msg_type;
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foh->obj_class = obj_class;
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foh->obj_inst.bts_nr = bts_nr;
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foh->obj_inst.trx_nr = trx_nr;
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foh->obj_inst.ts_nr = ts_nr;
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}
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#define OM_ALLOC_SIZE 1024
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#define OM_HEADROOM_SIZE 128
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static struct msgb *nm_msgb_alloc(void)
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{
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return msgb_alloc_headroom(OM_ALLOC_SIZE, OM_HEADROOM_SIZE, "OML");
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}
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static int abis_nm_sw_act_req_ack(struct e1inp_sign_link *sign_link,
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uint8_t obj_class,
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uint8_t i1, uint8_t i2, uint8_t i3,
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uint8_t *attr, int att_len)
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{
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struct abis_om_hdr *oh;
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struct msgb *msg = nm_msgb_alloc();
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uint8_t msgtype = NM_MT_SW_ACT_REQ_ACK;
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oh = (struct abis_om_hdr *) msgb_put(msg, ABIS_OM_FOM_HDR_SIZE);
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fill_om_fom_hdr(oh, att_len, msgtype, obj_class, i1, i2, i3);
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if (attr) {
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uint8_t *ptr = msgb_put(msg, att_len);
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memcpy(ptr, attr, att_len);
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}
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msg->dst = sign_link;
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return abis_sendmsg(msg);
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}
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static int abis_nm_rx_sw_act_req(struct msgb *msg)
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{
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struct abis_om_hdr *oh = msgb_l2(msg);
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struct abis_om_fom_hdr *foh = msgb_l3(msg);
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int ret;
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ret = abis_nm_sw_act_req_ack(msg->dst,
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foh->obj_class,
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foh->obj_inst.bts_nr,
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foh->obj_inst.trx_nr,
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foh->obj_inst.ts_nr,
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foh->data, oh->length-sizeof(*foh));
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return ret;
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}
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static int abis_nm_rcvmsg_fom(struct msgb *msg)
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{
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struct abis_om_fom_hdr *foh = msgb_l3(msg);
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uint8_t mt = foh->msg_type;
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int ret = 0;
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switch (mt) {
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case NM_MT_SW_ACT_REQ: /* Software activate request from BTS. */
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ret = abis_nm_rx_sw_act_req(msg);
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break;
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default:
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break;
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}
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return ret;
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}
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static int abis_nm_rcvmsg(struct msgb *msg)
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{
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int ret = 0;
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struct abis_om_hdr *oh = msgb_l2(msg);
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msg->l3h = (unsigned char *)oh + sizeof(*oh);
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switch (oh->mdisc) {
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case ABIS_OM_MDISC_FOM:
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ret = abis_nm_rcvmsg_fom(msg);
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break;
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default:
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LOGP(DBSCTEST, LOGL_ERROR, "unknown OML message\n");
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break;
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}
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return ret;
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}
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static int sign_link(struct msgb *msg)
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{
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int ret = 0;
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struct e1inp_sign_link *link = msg->dst;
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switch(link->type) {
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case E1INP_SIGN_RSL:
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LOGP(DBSCTEST, LOGL_NOTICE, "RSL message received.\n");
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break;
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case E1INP_SIGN_OML:
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LOGP(DBSCTEST, LOGL_NOTICE, "OML message received.\n");
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ret = abis_nm_rcvmsg(msg);
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break;
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default:
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LOGP(DBSCTEST, LOGL_ERROR, "Unknown signallin message.\n");
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break;
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}
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msgb_free(msg);
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return ret;
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}
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const struct log_info bsc_test_log_info = {
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.filter_fn = NULL,
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.cat = bsc_test_cat,
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.num_cat = ARRAY_SIZE(bsc_test_cat),
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};
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static struct e1inp_line *line;
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static void sighandler(int foo)
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{
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e1inp_line_put(line);
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exit(EXIT_SUCCESS);
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}
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int main(void)
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{
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tall_test = talloc_named_const(NULL, 1, "e1inp_test");
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libosmo_abis_init(tall_test);
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msgb_talloc_ctx_init(tall_test, 0);
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osmo_init_logging2(tall_test, &bsc_test_log_info);
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struct e1inp_line_ops ops = {
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.cfg = {
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.ipa = {
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.addr = "0.0.0.0",
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.role = E1INP_LINE_R_BSC,
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},
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},
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.sign_link_up = sign_link_up,
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.sign_link_down = sign_link_down,
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.sign_link = sign_link,
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};
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if (signal(SIGINT, sighandler) == SIG_ERR ||
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signal(SIGTERM, sighandler) == SIG_ERR) {
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perror("Cannot set sighandler");
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exit(EXIT_FAILURE);
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}
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#define LINENR 0
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line = e1inp_line_create(LINENR, "ipa");
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if (line == NULL) {
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LOGP(DBSCTEST, LOGL_ERROR, "problem creating E1 line\n");
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exit(EXIT_FAILURE);
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}
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e1inp_line_bind_ops(line, &ops);
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/*
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* Depending if this is a real or virtual E1 lines:
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* - real (ISDN): create signal link for OML and RSL before line up.
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* - vitual (INET): we create it in signal_link_up(...) callback.
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*
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* The signal link is created via e1inp_sign_link_create(...)
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*
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* See e1_reconfig_trx and e1_reconfig_bts in libbsc/e1_config.c,
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* it explains how this is done with ISDN.
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*/
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if (e1inp_line_update(line) < 0) {
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LOGP(DBSCTEST, LOGL_ERROR, "problem creating E1 line\n");
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exit(EXIT_FAILURE);
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}
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LOGP(DBSCTEST, LOGL_NOTICE, "entering main loop\n");
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while (1) {
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osmo_select_main(0);
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}
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return 0;
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}
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