stream: Add new stream_{cli,srv_link} parameters to set SCTP_INITMSG sockopt values

This will allow osmo_stream users (like libosmo-sccp) to set
SCTP_INITMSG related parameters, like number on inbound/outbound
streams, connect attempts, connect timeout.

Related: SYS#6558
Change-Id: I5343c7659881b29e0201e72badbc2d07e1ef2dca
---
M include/osmocom/netif/stream.h
M src/stream_cli.c
M src/stream_srv.c
3 files changed, 62 insertions(+), 0 deletions(-)

diff --git a/include/osmocom/netif/stream.h b/include/osmocom/netif/stream.h
index f78df8a..6ee5820 100644
--- a/include/osmocom/netif/stream.h
+++ b/include/osmocom/netif/stream.h
@@ -45,6 +45,8 @@
 enum osmo_stream_srv_link_param {
 	OSMO_STREAM_SRV_LINK_PAR_SCTP_SOCKOPT_AUTH_SUPPORTED, /* uint8_t: 0 disable, 1 enable, 2 force disable, 3 force enable */
 	OSMO_STREAM_SRV_LINK_PAR_SCTP_SOCKOPT_ASCONF_SUPPORTED, /* uint8_t: 0 disable, 1 enable, 2 force disable, 3 force enable */
+	OSMO_STREAM_SRV_LINK_PAR_SCTP_INIT_NUM_OSTREAMS, /* uint16_t: amount of streams */
+	OSMO_STREAM_SRV_LINK_PAR_SCTP_INIT_MAX_INSTREAMS, /* uint16_t: amount of streams */
 };
 
 int osmo_stream_srv_link_set_param(struct osmo_stream_srv_link *link, enum osmo_stream_srv_link_param par,
@@ -117,6 +119,10 @@
 enum osmo_stream_cli_param {
 	OSMO_STREAM_CLI_PAR_SCTP_SOCKOPT_AUTH_SUPPORTED, /* uint8_t: 0 disable, 1 enable, 2 force disable, 3 force enable */
 	OSMO_STREAM_CLI_PAR_SCTP_SOCKOPT_ASCONF_SUPPORTED, /* uint8_t: 0 disable, 1 enable, 2 force disable, 3 force enable */
+	OSMO_STREAM_CLI_PAR_SCTP_INIT_NUM_OSTREAMS, /* uint16_t: amount of streams */
+	OSMO_STREAM_CLI_PAR_SCTP_INIT_MAX_INSTREAMS, /* uint16_t: amount of streams */
+	OSMO_STREAM_CLI_PAR_SCTP_INIT_MAX_ATTEMPTS, /* uint16_t: amount of attempts */
+	OSMO_STREAM_CLI_PAR_SCTP_INIT_TIMEOUT, /* uint16_t: milliseconds */
 };
 
 int osmo_stream_cli_set_param(struct osmo_stream_cli *cli, enum osmo_stream_cli_param par,
diff --git a/src/stream_cli.c b/src/stream_cli.c
index 16d033e..23e1900 100644
--- a/src/stream_cli.c
+++ b/src/stream_cli.c
@@ -1023,6 +1023,34 @@
 		cli->ma_pars.sctp.sockopt_asconf_supported.abort_on_failure = val8 > 1;
 		cli->ma_pars.sctp.sockopt_asconf_supported.value = (val8 == 1 || val8 == 3) ? 1 : 0;
 		break;
+	case OSMO_STREAM_CLI_PAR_SCTP_INIT_NUM_OSTREAMS:
+		if (!val || val_len != sizeof(uint16_t))
+			return -EINVAL;
+		cli->ma_pars.sctp.sockopt_initmsg.set = true;
+		cli->ma_pars.sctp.sockopt_initmsg.num_ostreams_present = true;
+		cli->ma_pars.sctp.sockopt_initmsg.num_ostreams_value = *(uint16_t *)val;
+		break;
+	case OSMO_STREAM_CLI_PAR_SCTP_INIT_MAX_INSTREAMS:
+		if (!val || val_len != sizeof(uint16_t))
+			return -EINVAL;
+		cli->ma_pars.sctp.sockopt_initmsg.set = true;
+		cli->ma_pars.sctp.sockopt_initmsg.max_instreams_present = true;
+		cli->ma_pars.sctp.sockopt_initmsg.max_instreams_value = *(uint16_t *)val;
+		break;
+	case OSMO_STREAM_CLI_PAR_SCTP_INIT_MAX_ATTEMPTS:
+		if (!val || val_len != sizeof(uint16_t))
+			return -EINVAL;
+		cli->ma_pars.sctp.sockopt_initmsg.set = true;
+		cli->ma_pars.sctp.sockopt_initmsg.max_attempts_present = true;
+		cli->ma_pars.sctp.sockopt_initmsg.max_attempts_value = *(uint16_t *)val;
+		break;
+	case OSMO_STREAM_CLI_PAR_SCTP_INIT_TIMEOUT:
+		if (!val || val_len != sizeof(uint16_t))
+			return -EINVAL;
+		cli->ma_pars.sctp.sockopt_initmsg.set = true;
+		cli->ma_pars.sctp.sockopt_initmsg.max_init_timeo_present = true;
+		cli->ma_pars.sctp.sockopt_initmsg.max_init_timeo_value = *(uint16_t *)val;
+		break;
 	default:
 		return -ENOENT;
 	};
diff --git a/src/stream_srv.c b/src/stream_srv.c
index 186ec02..b404604 100644
--- a/src/stream_srv.c
+++ b/src/stream_srv.c
@@ -488,6 +488,20 @@
 		link->ma_pars.sctp.sockopt_asconf_supported.abort_on_failure = val8 > 1;
 		link->ma_pars.sctp.sockopt_asconf_supported.value = (val8 == 1 || val8 == 3) ? 1 : 0;
 		break;
+	case OSMO_STREAM_SRV_LINK_PAR_SCTP_INIT_NUM_OSTREAMS:
+		if (!val || val_len != sizeof(uint16_t))
+			return -EINVAL;
+		link->ma_pars.sctp.sockopt_initmsg.set = true;
+		link->ma_pars.sctp.sockopt_initmsg.num_ostreams_present = true;
+		link->ma_pars.sctp.sockopt_initmsg.num_ostreams_value = *(uint16_t *)val;
+		break;
+	case OSMO_STREAM_SRV_LINK_PAR_SCTP_INIT_MAX_INSTREAMS:
+		if (!val || val_len != sizeof(uint16_t))
+			return -EINVAL;
+		link->ma_pars.sctp.sockopt_initmsg.set = true;
+		link->ma_pars.sctp.sockopt_initmsg.max_instreams_present = true;
+		link->ma_pars.sctp.sockopt_initmsg.max_instreams_value = *(uint16_t *)val;
+		break;
 	default:
 		return -ENOENT;
 	};

