[osmo-bts PATCH 3/3 v2] main: Added support for changing the max_power_red in sbts2050

[Alvaro Neira Ayuso]

From: Álvaro Neira Ayuso <anayuso at sysmocom.de>

Added functions for changing the max_power_red in case of we receive
a Failure Event report from the manager. The sbts2050 change the
max_power_red to the value that we have configured in the manager
and the sbts2050 restore this value to the initial value if the bts
don't receive another Failure Event report in the same time that we
check the temperature in the manager.

Signed-off-by: Alvaro Neira Ayuso <anayuso at sysmocom.de>
---
[changes in v2]
* Renamed the constant variable tlv_add_info_len() to TLV_INFO_LEN

 src/osmo-bts-sysmo/main.c |   66 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/src/osmo-bts-sysmo/main.c b/src/osmo-bts-sysmo/main.c
index 7e332ad..9ced374 100644
--- a/src/osmo-bts-sysmo/main.c
+++ b/src/osmo-bts-sysmo/main.c
@@ -39,6 +39,7 @@
 #include <osmocom/vty/telnet_interface.h>
 #include <osmocom/vty/logging.h>
 #include <osmocom/gsm/protocol/ipaccess.h>
+#include <osmocom/gsm/abis_nm.h>
 
 #include <osmo-bts/gsm_data.h>
 #include <osmo-bts/logging.h>
@@ -54,11 +55,14 @@
 
 #define IPA_OML_PROTO		0xFF
 
+#define TEMP_TIMER_SECS		((6 * 3600) + 1)
+
 #include "utils.h"
 #include "eeprom.h"
 #include "l1_if.h"
 #include "hw_misc.h"
 #include "btsconfig.h"
+#include <misc/sysmobts_misc.h>
 
 /* FIXME: read from real hardware */
 const uint8_t abis_mac[6] = { 0,1,2,3,4,5 };
@@ -297,6 +301,60 @@ static int write_pid_file(char *procname)
 }
 
 #ifdef BUILD_SBTS2050
+static int init_max_power_red;
+static int new_max_power_red;
+static int status_change_power_red = 0;
+
+enum {
+	SBTS2050_DISABLE_CHANGE_POWER = 0,
+	SBTS2050_ENABLE_CHANGE_POWER,
+};
+
+#define oml_tlv_parse(dec, buf, len)	\
+	 tlv_parse(dec, &abis_nm_att_tlvdef, buf, len, 0, 0)
+
+/* size of the struct plus 1 Bytes of tag and 2 Bytes for the length */
+#define TLV_ADD_INFO_LEN	(sizeof(struct sbts2050_config_info) + 3)
+
+static struct osmo_timer_list power_timer;
+static void change_max_power_red_cb(void *data)
+{
+	struct gsm_bts *bts = data;
+
+	if (status_change_power_red == SBTS2050_ENABLE_CHANGE_POWER) {
+		if (bts->c0->max_power_red != new_max_power_red) {
+			init_max_power_red = bts->c0->max_power_red;
+			bts->c0->max_power_red = new_max_power_red;
+		}
+		status_change_power_red = SBTS2050_DISABLE_CHANGE_POWER;
+		osmo_timer_schedule(&power_timer, TEMP_TIMER_SECS, 0);
+	} else if (status_change_power_red == SBTS2050_DISABLE_CHANGE_POWER)
+		bts->c0->max_power_red = init_max_power_red;
+}
+
+static int take_max_power_red(struct msgb *msg)
+{
+	struct sbts2050_config_info *config_info;
+	struct tlv_parsed tlv_out;
+	int rc;
+
+	rc = oml_tlv_parse(&tlv_out, msg->tail - TLV_ADD_INFO_LEN,
+			   TLV_ADD_INFO_LEN);
+
+	if (rc < 0)
+		return -1;
+
+	config_info =
+	    (struct sbts2050_config_info *) TLVP_VAL(&tlv_out, NM_ATT_ADD_INFO);
+
+	new_max_power_red = config_info->max_power_red;
+
+	status_change_power_red = SBTS2050_ENABLE_CHANGE_POWER;
+	change_max_power_red_cb(bts);
+
+	return 0;
+}
+
 static int test_recv_msg(struct msgb *msg)
 {
 	struct ipaccess_head *hh;
@@ -376,6 +434,11 @@ static int read_sock(struct osmo_fd *fd, unsigned int what)
 		goto err;
 	}
 
+	if (take_max_power_red(msg) < 0) {
+		LOGP(DL1C, LOGL_NOTICE, "Failed Add_info: Malformed message");
+		goto err;
+	}
+
 	mo = &bts->mo;
 	msg->trx = mo->bts->c0;
 
@@ -422,6 +485,9 @@ static int sbts2050_sock_unix_init(struct osmo_fd *accept, struct osmo_fd *read)
 	read->fd = -1;
 	accept->data = read;
 
+	power_timer.cb = change_max_power_red_cb;
+	power_timer.data = bts;
+
 	rc = osmo_sock_unix_init_ofd(accept, SOCK_SEQPACKET, 0, SOCKET_PATH,
 				     OSMO_SOCK_F_BIND | OSMO_SOCK_F_NONBLOCK);
 	return rc;
-- 
1.7.10.4