WIP: gsmtap

1 files changed, 104 insertions, 0 deletions

diff --git a/src/diag_dpl.c b/src/diag_dpl.c
new file mode 100644
index 0000000..26fd36a
--- /dev/null
+++ b/src/diag_dpl.c
@@ -0,0 +1,104 @@
+/* Utility code for Diag Packet Logging */
+/*
+ * (C) 2016 by Harald Welte <laforge@gnumonks.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <osmocom/core/utils.h>
+#include <osmocom/core/msgb.h>
+
+#include "protocol/diagcmd.h"
+#include "protocol/diag_log_1x.h"
+#include "protocol/dpl.h"
+
+/* iface-id 0..99 */
+/* every interface has multiple physical links */
+/* iid contains flag info: 16bits LDFx IFNA PROT LINS, see struct
+ * dpl_iid
+ */
+
+int diag_dpl_reset_logging(struct diag_instance *di)
+{
+	struct msb *msg = msgb_alloc_diag();
+	diag_push_subsys_hdr(msg, DIAG_SUBSYS_PS_DATA_LOGGING,
+			     DIAG_DPL_RESET_LOGGING);
+	diag_transmit_msgb(di, msg);
+	diag_read(di);
+	return 0;
+}
+
+int diag_dpl_get_sup_if(struct diag_instance *di)
+{
+	struct msgb *mgs = msgb_alloc_diag();
+	diag_push_subsys_hdr(msg, DIAG_SUBSYS_PS_DATA_LOGGING,
+			     DIAG_DPL_GET_SUPPORTED_IFACES);
+	diag_transmit_msgb(di, msg);
+	diag_read(di);
+	return 0;
+}
+
+int diag_dpl_get_if_desc(struct diag_instance *di, uint8_t iface_id)
+{
+	struct msgb *mgs = msgb_alloc_diag();
+	struct dpl_get_if_desc_req *gidr;
+
+	gidr = (struct dpl_get_if_desc_req *) mgsb_put(msg, sizeof(*gidr));
+	gidr->iface_id = iface_id;
+	diag_push_subsys_hdr(msg, DIAG_SUBSYS_PS_DATA_LOGGING,
+			     DIAG_DPL_GET_SUPPORTED_IFACES);
+	diag_transmit_msgb(di, msg);
+	diag_read(di);
+	return 0;
+}
+
+int diag_dpl_set_if_log(struct diag_instance *di, uint8_t iface_id)
+{
+	struct msgb *mgs = msgb_alloc_diag();
+	struct dpl_set_if_log_req *silr;
+
+	silr = (struct dpl_get_if_desc_req *) msgb_put(msg, sizeof(*silr));
+	silr->iface_id = iface_id;
+	silr->num_log_flags = 1;
+	msgb_put(msg, sizeof(silr->log_flags[0]);
+	silr->log_flags[0].iid = FIXME;
+	silr->log_flags[0].link_type = FIXME;
+
+	diag_transmit_msgb(di, msg);
+	diag_read(di);
+
+	return 0;
+}
+
+/* LOG_DATA_PROTOCOL_LOGGING_C must be enabled */
+/* dpli_log_full_packet() used to log packet; maximum of 256 bytes per
+ * diag message; DPLI_BUILD_LOG_PACKET */
+static void handle_pcap_msg(struct log_hdr *lh, struct msgb *msg)
+{
+	struct dpl_hdr *dh = (struct dpl_hdr *) msgb_data(msg);
+	printf("(fl=0x%02x, ifn=0x%02x, prot=0x%02x, inst=%u, seq=%u, seg=%u): %s",
+		dh->iid.flags, dh->iid.if_name, dh->iid.protocol,
+		dh->iid.link_instance, dh->seeq_nr, sh->seg_num,
+		osmo_hexdump(dh->data, msgb_len(msg)-sizeof(*dh)));
+}
+
+static const struct diag_log_dispatch_tbl log_tbl[] = {
+	{ L1X(LOG_DATA_PROTOCOL_LOGGING_C), handle_pcap_msg },
+};
+
+static __attribute__((constructor)) void on_dso_load_gsm(void)
+{
+	diag_log_reg_dispatch(log_tbl, ARRAY_SIZE(log_tbl));
+}