diff options
Diffstat (limited to 'src/input/dahdi.c')
| -rw-r--r-- | src/input/dahdi.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/input/dahdi.c b/src/input/dahdi.c index ab06908..db00f5f 100644 --- a/src/input/dahdi.c +++ b/src/input/dahdi.c @@ -360,6 +360,79 @@ static int handle_tsX_read(struct osmo_fd *bfd) return ret; } +/* write to a raw channel TS */ +static int handle_ts_raw_write(struct osmo_fd *bfd) +{ + struct e1inp_line *line = bfd->data; + unsigned int ts_nr = bfd->priv_nr; + struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; + struct msgb *msg; + int ret; + + /* get the next msg for this timeslot */ + msg = e1inp_tx_ts(e1i_ts, NULL); + if (!msg) + return 0; + + if (msg->len != D_BCHAN_TX_GRAN) { + /* This might lead to a transmit underrun, as we call tx + * from the rx path, as there's no select/poll on dahdi + * */ + LOGP(DLINP, LOGL_NOTICE, "unexpected msg->len = %u, " + "expected %u\n", msg->len, D_BCHAN_TX_GRAN); + } + + DEBUGP(DLMIB, "RAW CHAN TX: %s\n", + osmo_hexdump(msg->data, msg->len)); + + if (0/*invertbits*/) { + flip_buf_bits(msg->data, msg->len); + } + + ret = write(bfd->fd, msg->data, msg->len); + if (ret < msg->len) + LOGP(DLINP, LOGL_DEBUG, "send returns %d instead of %d\n", + ret, msg->len); + msgb_free(msg); + + return ret; +} + +static int handle_ts_raw_read(struct osmo_fd *bfd) +{ + struct e1inp_line *line = bfd->data; + unsigned int ts_nr = bfd->priv_nr; + struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; + struct msgb *msg = msgb_alloc(D_TSX_ALLOC_SIZE, "DAHDI Raw TS"); + int ret; + + if (!msg) + return -ENOMEM; + + ret = read(bfd->fd, msg->data, D_TSX_ALLOC_SIZE); + if (ret < 0 || ret != D_TSX_ALLOC_SIZE) { + LOGP(DLINP, LOGL_DEBUG, "read error %d %s\n", + ret, strerror(errno)); + return ret; + } + + if (0/*invertbits*/) { + flip_buf_bits(msg->data, ret); + } + + msgb_put(msg, ret); + + msg->l2h = msg->data; + DEBUGP(DLMIB, "RAW CHAN RX: %s\n", + osmo_hexdump(msgb_l2(msg), ret)); + ret = e1inp_rx_ts(e1i_ts, msg, 0, 0); + /* physical layer indicates that data has been sent, + * we thus can send some more data */ + ret = handle_ts_raw_write(bfd); + + return ret; +} + /* callback from select.c in case one of the fd's can be read/written */ static int dahdi_fd_cb(struct osmo_fd *bfd, unsigned int what) { @@ -389,6 +462,17 @@ static int dahdi_fd_cb(struct osmo_fd *bfd, unsigned int what) * writeset, since it doesn't support poll() based * write flow control */ break; + case E1INP_TS_TYPE_RAW: + if (what & BSC_FD_EXCEPT) + handle_dahdi_exception(e1i_ts); + if (what & BSC_FD_READ) + rc = handle_ts_raw_read(bfd); + if (what & BSC_FD_WRITE) + rc = handle_ts_raw_write(bfd); + /* We never include the DAHDI B-Channel FD into the + * writeset, since it doesn't support poll() based + * write flow control */ + break; default: LOGP(DLINP, LOGL_NOTICE, "unknown E1 TS type %u\n", e1i_ts->type); @@ -537,6 +621,7 @@ static int dahdi_e1_setup(struct e1inp_line *line) e1i_ts, &lapd_profile_abis); break; case E1INP_TS_TYPE_TRAU: + case E1INP_TS_TYPE_RAW: /* close/release LAPD instance, if any */ if (e1i_ts->lapd) { lapd_instance_free(e1i_ts->lapd); |