uqmi: Add IP family selection command-line switch

This patch adds support for (optionally) specifying ip family via a
command- line switch. The switch sends respective "Set IP Family" WDS
message to qmi-device before actually connecting.

Using this switch allows connecting to ipv6 enabled networks or networks
with dual-stack support with the appropriate hardware (dongle and FW
with ipv6 support) and configuration (AT+CGDCONT reporting ipv6 or
ipv4v6 capability).

Help text:
  --ip-family <family>:    Set ip-family for the connection (ipv4, ipv6, unspecified)

Usage example for ipv6:
  uqmi -d /dev/cdc-wdm0 --set-client-id wds,<cid> --start-network <apn> --ip-family ipv6

Dual-stack usage example:
  uqmi -d /dev/cdc-wdm0 --get-client-id wds
  uqmi -d /dev/cdc-wdm0 --set-client-id wds,<cid-1> --start-network <apn> --ip-family ipv4
  uqmi -d /dev/cdc-wdm0 --get-client-id wds
  uqmi -d /dev/cdc-wdm0 --set-client-id wds,<cid-2> --start-network <apn> --ip-family ipv6

Signed-off-by: Antti Seppälä <a.seppala@gmail.com>
Tested-by: Matti Laakso <malaakso@elisanet.fi>

2 files changed, 30 insertions, 0 deletions

diff --git a/commands-wds.c b/commands-wds.c
index aa57d03..fdf9003 100644
--- a/commands-wds.c
+++ b/commands-wds.c
@@ -170,3 +170,31 @@ cmd_wds_reset_prepare(struct qmi_dev *qmi, struct qmi_request *req, struct qmi_m
 	qmi_set_wds_reset_request(msg);
 	return QMI_CMD_REQUEST;
 }
+
+#define cmd_wds_set_ip_family_cb no_cb
+static enum qmi_cmd_result
+cmd_wds_set_ip_family_prepare(struct qmi_dev *qmi, struct qmi_request *req, struct qmi_msg *msg, char *arg)
+{
+	struct qmi_wds_set_ip_family_request ipf_req;
+	const struct ip_modes {
+		const char *name;
+		const QmiWdsIpFamily mode;
+	} modes[] = {
+		{ "ipv4", QMI_WDS_IP_FAMILY_IPV4 },
+		{ "ipv6", QMI_WDS_IP_FAMILY_IPV6 },
+		{ "unspecified", QMI_WDS_IP_FAMILY_UNSPECIFIED },
+	};
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(modes); i++) {
+		if (strcasecmp(modes[i].name, arg) != 0)
+			continue;
+
+		qmi_set(&ipf_req, preference, modes[i].mode);
+		qmi_set_wds_set_ip_family_request(msg, &ipf_req);
+		return QMI_CMD_REQUEST;
+	}
+
+	uqmi_add_error("Invalid value (valid: ipv4, ipv6, unspecified)");
+	return QMI_CMD_EXIT;
+}
diff --git a/commands-wds.h b/commands-wds.h
index 19e6406..8ddfb1e 100644
--- a/commands-wds.h
+++ b/commands-wds.h
@@ -24,6 +24,7 @@
 	__uqmi_command(wds_set_auth, auth-type, required, CMD_TYPE_OPTION), \
 	__uqmi_command(wds_set_username, username, required, CMD_TYPE_OPTION), \
 	__uqmi_command(wds_set_password, password, required, CMD_TYPE_OPTION), \
+	__uqmi_command(wds_set_ip_family, ip-family, required, CMD_TYPE_OPTION), \
 	__uqmi_command(wds_set_autoconnect, autoconnect, no, CMD_TYPE_OPTION), \
 	__uqmi_command(wds_stop_network, stop-network, required, QMI_SERVICE_WDS), \
 	__uqmi_command(wds_get_packet_service_status, get-data-status, no, QMI_SERVICE_WDS), \
@@ -36,6 +37,7 @@
 		"    --auth-type pap|chap|both|none: Use network authentication type\n" \
 		"    --username <name>:              Use network username\n" \
 		"    --password <password>:          Use network password\n" \
+		"    --ip-family <family>:           Use ip-family for the connection (ipv4, ipv6, unspecified)\n" \
 		"    --autoconnect:                  Enable automatic connect/reconnect\n" \
 		"  --stop-network <pdh>:             Stop network connection (use with option below)\n" \
 		"    --autoconnect:                  Disable automatic connect/reconnect\n" \