introduce new API for configuring the diag logging
diff --git a/src/config.c b/src/config.c
new file mode 100644
index 0000000..90887bb
--- /dev/null
+++ b/src/config.c
@@ -0,0 +1,58 @@
+#include <stdint.h>
+#include <osmocom/core/msgb.h>
+
+#include "diagcmd.h"
+#include "framing.h"
+
+enum log_config_op {
+ LOG_CONFIG_DISABLE_OP = 0,
+ LOG_CONFIG_RETRIEVE_ID_RANGES_OP = 1,
+ LOG_CONFIG_RETRIEVE_VALID_MASK_OP = 2,
+ LOG_CONFIG_SET_MASK_OP = 3,
+ LOG_CONFIG_GET_LOGMASK_OP = 4,
+};
+
+struct diag_log_config_req_hdr {
+ uint8_t msg_type;
+ uint8_t pad[3];
+ uint32_t operation;
+} __attribute((packed));
+
+struct diag_log_config_set_mask {
+ struct diag_log_config_req_hdr hdr;
+ uint32_t equip_id;
+ uint32_t last_item;
+ uint8_t data[0];
+} __attribute((packed));
+
+struct msgb *gen_log_config_set_mask(uint32_t last_item)
+{
+ struct msgb *msg = msgb_alloc(MAX_PACKET, "Diag Tx");
+ struct diag_log_config_set_mask *dlcsm;
+ uint8_t *mask;
+
+ msg->l2h = msgb_put(msg, sizeof(*dlcsm));
+ dlcsm = (struct diag_log_config_set_mask *) msg->l2h;
+ dlcsm->hdr.msg_type = DIAG_LOG_CONFIG_F;
+ dlcsm->hdr.operation = LOG_CONFIG_SET_MASK_OP;
+ dlcsm->equip_id = 5;
+ dlcsm->last_item = last_item;
+ msg->l3h = msgb_put(msg, dlcsm->last_item/8);
+
+ return msg;
+}
+
+int log_config_set_mask_bit(struct msgb *msg, uint32_t bit_in)
+{
+ struct diag_log_config_set_mask *dlcsm = msg->l2h;
+ uint8_t *mask = msg->l3h;
+ unsigned int byte = bit_in / 8;
+ unsigned int bit = bit_in % 8;
+
+ if (byte > dlcsm->last_item/8)
+ return -1;
+
+ mask[byte] |= (1 << bit);
+
+ return 0;
+}