188 lines
5.0 KiB
C
188 lines
5.0 KiB
C
/* UDP-Feed of measurement reports */
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#include <unistd.h>
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#include <sys/socket.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/socket.h>
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#include <osmocom/core/write_queue.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/vty/command.h>
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#include <osmocom/vty/vty.h>
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#include <osmocom/bsc/meas_rep.h>
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#include <osmocom/bsc/signal.h>
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#include <osmocom/bsc/bsc_subscriber.h>
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#include <osmocom/bsc/meas_feed.h>
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#include <osmocom/bsc/vty.h>
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#include <osmocom/bsc/debug.h>
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#include <osmocom/bsc/bts.h>
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#include <osmocom/bsc/lchan.h>
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struct meas_feed_state {
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struct osmo_wqueue wqueue;
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char scenario[31+1];
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char *dst_host;
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uint16_t dst_port;
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};
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static struct meas_feed_state g_mfs = {};
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static int process_meas_rep(struct gsm_meas_rep *mr)
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{
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struct msgb *msg;
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struct meas_feed_meas *mfm;
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struct bsc_subscr *bsub;
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/* ignore measurements as long as we don't know who it is */
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if (!mr->lchan) {
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LOGP(DMEAS, LOGL_DEBUG, "meas_feed: no lchan, not sending report\n");
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return 0;
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}
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if (!mr->lchan->conn) {
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LOGP(DMEAS, LOGL_DEBUG, "meas_feed: lchan without conn, not sending report\n");
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return 0;
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}
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bsub = mr->lchan->conn->bsub;
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msg = msgb_alloc(sizeof(struct meas_feed_meas), "Meas. Feed");
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if (!msg)
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return 0;
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/* fill in the header */
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mfm = (struct meas_feed_meas *) msgb_put(msg, sizeof(*mfm));
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mfm->hdr.msg_type = MEAS_FEED_MEAS;
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mfm->hdr.version = MEAS_FEED_VERSION;
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/* fill in MEAS_FEED_MEAS specific header */
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if (bsub)
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osmo_strlcpy(mfm->imsi, bsub->imsi, sizeof(mfm->imsi));
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/* This used to be a human readable meaningful name set in the old osmo-nitb's subscriber
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* database. Now we're several layers away from that (and possibly don't even have a name in
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* osmo-hlr either), hence this is a legacy item now that we should leave empty ... *but*:
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* here in the BSC we often don't know the subscriber's full identity information. For example,
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* we might only know the TMSI, and hence would pass an empty IMSI above. So after all, feed
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* bsc_subscr_name(), which possibly will feed the IMSI again, but in case only the TMSI is known
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* would add that to the information set as "TMSI:0x12345678". */
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osmo_strlcpy(mfm->name, bsc_subscr_name(bsub), sizeof(mfm->name));
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osmo_strlcpy(mfm->scenario, g_mfs.scenario, sizeof(mfm->scenario));
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/* copy the entire measurement report */
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memcpy(&mfm->mr, mr, sizeof(mfm->mr));
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/* copy channel information */
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/* we assume that the measurement report always belong to some timeslot */
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mfm->lchan_type = (uint8_t)mr->lchan->type;
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mfm->pchan_type = (uint8_t)mr->lchan->ts->pchan_is;
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mfm->bts_nr = mr->lchan->ts->trx->bts->nr;
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mfm->trx_nr = mr->lchan->ts->trx->nr;
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mfm->ts_nr = mr->lchan->ts->nr;
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mfm->ss_nr = mr->lchan->nr;
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/* and send it to the socket */
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if (osmo_wqueue_enqueue(&g_mfs.wqueue, msg) != 0) {
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LOGP(DMEAS, LOGL_ERROR, "meas_feed %s: sending measurement report failed\n",
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gsm_lchan_name(mr->lchan));
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msgb_free(msg);
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} else
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LOGP(DMEAS, LOGL_DEBUG, "meas_feed %s: sent measurement report\n",
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gsm_lchan_name(mr->lchan));
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return 0;
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}
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static int meas_feed_sig_cb(unsigned int subsys, unsigned int signal,
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void *handler_data, void *signal_data)
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{
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struct lchan_signal_data *sdata = signal_data;
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if (subsys != SS_LCHAN)
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return 0;
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if (signal == S_LCHAN_MEAS_REP)
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process_meas_rep(sdata->mr);
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return 0;
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}
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static int feed_write_cb(struct osmo_fd *ofd, struct msgb *msg)
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{
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return write(ofd->fd, msgb_data(msg), msgb_length(msg));
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}
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static int feed_read_cb(struct osmo_fd *ofd)
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{
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int rc;
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char buf[256];
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rc = read(ofd->fd, buf, sizeof(buf));
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osmo_fd_read_disable(ofd);
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return rc;
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}
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int meas_feed_cfg_set(const char *dst_host, uint16_t dst_port)
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{
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int rc;
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int already_initialized = 0;
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if (g_mfs.wqueue.bfd.fd)
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already_initialized = 1;
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if (already_initialized &&
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!strcmp(dst_host, g_mfs.dst_host) &&
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dst_port == g_mfs.dst_port)
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return 0;
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if (!already_initialized) {
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osmo_wqueue_init(&g_mfs.wqueue, 10);
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g_mfs.wqueue.write_cb = feed_write_cb;
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g_mfs.wqueue.read_cb = feed_read_cb;
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osmo_signal_register_handler(SS_LCHAN, meas_feed_sig_cb, NULL);
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LOGP(DMEAS, LOGL_DEBUG, "meas_feed: registered signal callback\n");
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}
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if (already_initialized) {
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osmo_wqueue_clear(&g_mfs.wqueue);
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osmo_fd_unregister(&g_mfs.wqueue.bfd);
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close(g_mfs.wqueue.bfd.fd);
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/* don't set to zero, as that would mean 'not yet initialized' */
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g_mfs.wqueue.bfd.fd = -1;
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}
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rc = osmo_sock_init_ofd(&g_mfs.wqueue.bfd, AF_UNSPEC, SOCK_DGRAM,
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IPPROTO_UDP, dst_host, dst_port,
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OSMO_SOCK_F_CONNECT);
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if (rc < 0)
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return rc;
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osmo_fd_read_disable(&g_mfs.wqueue.bfd);
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if (g_mfs.dst_host)
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talloc_free(g_mfs.dst_host);
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g_mfs.dst_host = talloc_strdup(NULL, dst_host);
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g_mfs.dst_port = dst_port;
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return 0;
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}
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void meas_feed_cfg_get(char **host, uint16_t *port)
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{
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*port = g_mfs.dst_port;
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*host = g_mfs.dst_host;
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}
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void meas_feed_scenario_set(const char *name)
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{
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osmo_strlcpy(g_mfs.scenario, name, sizeof(g_mfs.scenario));
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}
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const char *meas_feed_scenario_get(void)
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{
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return g_mfs.scenario;
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}
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