net: dhcp: Split dhcp funcionality & add dhcp command

dhcp/bootp was bound to the command functionality.
This patch splits the dhcp command.
We are now able to use bootp without a shell.

This patch adds also a check for environment variables and globalvar.
So only when ENVIRONMENT_VARIABLES and GLOBALVAR is set, all received
dhcp data will be stored.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 78 insertions, 0 deletions

diff --git a/commands/dhcp.c b/commands/dhcp.c
new file mode 100644
index 0000000000..eb98bfc2a7
--- /dev/null
+++ b/commands/dhcp.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2015 PHYTEC Messtechnik GmbH,
+ * Author: Wadim Egorov <w.egorov@phytec.de>
+ *
+ * Based on work of Sascha Hauer <s.hauer@pengutronix.de>.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <complete.h>
+#include <environment.h>
+#include <getopt.h>
+#include <dhcp.h>
+
+static int do_dhcp(int argc, char *argv[])
+{
+	int ret, opt;
+	int retries = DHCP_DEFAULT_RETRY;
+	struct dhcp_req_param dhcp_param;
+
+	memset(&dhcp_param, 0, sizeof(struct dhcp_req_param));
+	getenv_uint("global.dhcp.retries", &retries);
+
+	while ((opt = getopt(argc, argv, "H:v:c:u:U:r:")) > 0) {
+		switch (opt) {
+		case 'H':
+			dhcp_param.hostname = optarg;
+			break;
+		case 'v':
+			dhcp_param.vendor_id = optarg;
+			break;
+		case 'c':
+			dhcp_param.client_id = optarg;
+			break;
+		case 'u':
+			dhcp_param.client_uuid = optarg;
+			break;
+		case 'U':
+			dhcp_param.user_class = optarg;
+			break;
+		case 'r':
+			retries = simple_strtoul(optarg, NULL, 10);
+			break;
+		}
+	}
+
+	if (!retries) {
+		printf("retries is set to zero, set it to %d\n", DHCP_DEFAULT_RETRY);
+		retries = DHCP_DEFAULT_RETRY;
+	}
+
+	ret = dhcp(retries, &dhcp_param);
+
+	return ret;
+}
+
+BAREBOX_CMD_HELP_START(dhcp)
+BAREBOX_CMD_HELP_TEXT("Options:")
+BAREBOX_CMD_HELP_OPT("-H HOSTNAME", "hostname to send to the DHCP server")
+BAREBOX_CMD_HELP_OPT("-v ID\t", "DHCP Vendor ID (code 60) submitted in DHCP requests")
+BAREBOX_CMD_HELP_OPT("-c ID\t", "DHCP Client ID (code 61) submitted in DHCP requests")
+BAREBOX_CMD_HELP_OPT("-u UUID\t", "DHCP Client UUID (code 97) submitted in DHCP requests")
+BAREBOX_CMD_HELP_OPT("-U CLASS", "DHCP User class (code 77) submitted in DHCP requests")
+BAREBOX_CMD_HELP_OPT("-r RETRY", "retry limit (default 20)");
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(dhcp)
+	.cmd		= do_dhcp,
+	BAREBOX_CMD_DESC("DHCP client to obtain IP or boot params")
+	BAREBOX_CMD_OPTS("[-HvcuUr]")
+	BAREBOX_CMD_GROUP(CMD_GRP_NET)
+	BAREBOX_CMD_HELP(cmd_dhcp_help)
+	BAREBOX_CMD_COMPLETE(empty_complete)
+BAREBOX_CMD_END