From 321bfe6c5cbad58e97fbb2df3c93564c89f1e09b Mon Sep 17 00:00:00 2001

From: padkrish <padkrish@cisco.com>

Date: Wed, 21 Jan 2015 03:38:53 +0000

Subject: [PATCH] VDP: Support for OUI infrastructure in vdptool.

This patch contains the changes made in vdptool to support OUI fields

in vdptool. This commit has only the infra-structure changes needed

for supporting OUI. No specific OUI fields are added as a part of this

commit. The man page for vdptool is also modified accordingly.

The OUI data can be given as input to vdptool in different ways. It

could be

   vdptool .... -c oui=companyA,Data1 -c oui=companyB,Data2 -c oui=companyA,Data3

 Or

   vdptool .... -c oui=companyA,Data1Data3 -c oui=companyB,data2

where companyA and companyB are the name of the Organizations.

Anything after the comma in OUI data field is Org specific and it's

upto the respective organization specific handlers to encode it so

that it could be decoded appropriately by the ORG specific handlers

inside lldpad. That is, Data1 and Data3 is specific to Organization

'companyA' and the OUI handlers of companyA in vdptool and lldpad is

responsible for encoding/decoding the data. The common code in vdptool

and lldpad just treats it as opaque data. 'companyA' or 'companyB'

above is the key using which the right handlers will be called.

Irrespective of how the command line interface to vdptool is, the

input to lldpad is always the same. i.e. KeywordlenKeywordDatalenData

For OUI, the data field will have the complete OUI data starting with

ORG name (e.g companyA). So, in order to call the right handler

routine, the OUI data field is split as OUInamelenOUInameOUIData.

OUInamelen is 2B.

For example if the following is given:

vdptool -T -W -i eth2  -V assoc \

    -c mode=assoc -c mgrid2=0 -c typeid=0 -c typeidver=0  \

    -c uuid=18ea3452-b364-4e13-a1a2-9c6524deb685 -c hints=none \

    -c filter=0-fa:16:3e:4c:2d:85-90001 -c oui=companyA,val1=data1

The data sent to lldpad by vdptool will be as follows assuming

companyA encode handlers in vdptool encodes it the same way:

04mode0005assoc06mgrid20001006typeid0001009typeidver0001004uuid002418ea3452-b364-4e13-a1a2-9c6524deb68505hints0004none06filter00190-fa:16:3e:4c:2d:85-9000103oui001408companyAval1=data1

This commit will not insert the oui fields as given above because no OUI

specific handlers are added.

Signed-off-by: padkrish <padkrish@cisco.com>

Signed-off-by: John Fastabend <john.r.fastabend@intel.com>

---

 docs/vdptool.8          |  50 +++++++++++++++-

 include/qbg_vdp22_oui.h |  11 ++++

 vdptool.c               | 149 +++++++++++++++++++++++++++++++++++++++++++++---

 3 files changed, 201 insertions(+), 9 deletions(-)

diff --git a/docs/vdptool.8 b/docs/vdptool.8

index 0b50a13..4580c71 100644

--- a/docs/vdptool.8

+++ b/docs/vdptool.8

@@ -182,6 +182,31 @@ delimited by two slashes ('--'),

 also known as filter information format 3.

 For vlan and group details see (1) and (4).

 .RE

+.TP

+.B "oui (Organizationally Unique Identifier):"

+This defines the optional Organizationally

+defined information field. This contains the

+specific sets of values for this entry. There

+can be multiple organizational specific fields,

+in which case there will be multiple keywords

+.I oui=

+followed by the values.

+The value is of the following format:

+.EX

+oui=OUI,[Organization specific values ]

+.EE

+The OUI specifies the name of the Organization

+that is responsible for defining

+this content. A comma is mandatory after the OUI

+field. The fields following this

+ is specified by the organization and

+hence will be decoded based on the value of this

+OUI field. Currently, the following values for

+OUI are supported.

+.RS

+.IP cisco -

+Specifies Cisco defined OUI.

+.TP

 .SH COMMANDS

 .TP

 .B license

@@ -226,13 +251,33 @@ vdptool -i eth2 -T -V assoc -c mode=assoc -c mgrid2=blabla \\

 	-c filter=2-52:00:00:11:22:33-200

 .fi

 .TP

-Create a VSI association on interface eth2 and wait for the response from the bridge

+Create a VSI association on interface eth2 and wait for the

+response from the bridge

 .br

 .nf

 vdptool -i eth2 -T -W -V assoc -c mode=assoc -c mgrid2=blabla \\

 	-c typeid=5 -c uuid=1122 -c typeidver=4 -c hints=none \\

 	-c filter=0-52:00:00:11:22:33-200

 .fi

+.TP

+Create a VSI association on interface eth2 wth OUI parameters

+and wait for the response from the bridge

+.br

+.nf

+vdptool -i eth2 -T -W -V assoc -c mode=assoc -c mgrid2=blabla \\

+	-c typeid=5 -c uuid=1122 -c typeidver=4 -c hints=none \\

+	-c filter=0-52:00:00:11:22:33-200 -c oui=CompanyA,data

+.fi

+.TP

+Create a VSI association on interface eth2 wth multiple OUI parameters

+and wait for the response from the bridge

+.br

+.nf

+vdptool -i eth2 -T -W -V assoc -c mode=assoc -c mgrid2=blabla \\

+	-c typeid=5 -c uuid=1122 -c typeidver=4 -c hints=none \\

+	-c filter=0-52:00:00:11:22:33-200 -c oui=CompanyA,data \\

+	-c oui=CompanyB,data

+.fi

 .TP

 Query all VSI association on interface eth2

@@ -240,7 +285,8 @@ Query all VSI association on interface eth2

 vdptool -i eth2 -t -V assoc

 .TP

-Query  VSI association on interface eth2 that matches specific VSI parameters. Any of the VSI parameters below can be omitted.

+Query  VSI association on interface eth2 that matches specific

+VSI parameters. Any of the VSI parameters below can be omitted.

 .br

 vdptool -i eth2 -t -V assoc -t -V assoc -c mode=assoc \\

         -c mgrid2=blabla -c typeid=5 -c uuid=1122 \\

diff --git a/include/qbg_vdp22_oui.h b/include/qbg_vdp22_oui.h

index 0aeb7b9..d31c6ad 100644

--- a/include/qbg_vdp22_oui.h

+++ b/include/qbg_vdp22_oui.h

@@ -33,6 +33,7 @@

 enum vdp22_oui {

 	VDP22_OUI_TYPE_LEN = 3,          /* Size of OUI Type field */

 	VDP22_OUI_MAX_NAME = 20,

+	MAX_OUI_DATA_LEN = 200

 };

 struct vdp22_oui_data_s {

@@ -43,4 +44,14 @@ struct vdp22_oui_data_s {

 	void *data;

 };

+typedef struct vdptool_oui_data_s {

+	char oui_name[VDP22_OUI_MAX_NAME];

+	char data[MAX_OUI_DATA_LEN];

+} vdptool_oui_data_t;

+

+typedef struct vdptool_oui_hndlr_tbl_s {

+	char *oui_name;

+	bool (*oui_cli_encode_hndlr)(char *dst, char *src, size_t len);

+} vdptool_oui_hndlr_tbl_t;

+

 #endif /* __VDP22_OUI_H__ */

diff --git a/vdptool.c b/vdptool.c

index f7fd288..c857a85 100644

--- a/vdptool.c

+++ b/vdptool.c

@@ -55,6 +55,22 @@

 #include "qbg_vdp22_clif.h"

 #include "lldp_util.h"

 #include "qbg_vdp22def.h"

+#include "qbg_vdp22_oui.h"

+

+#define OUI_ENCODE_HNDLR(name) name##_oui_encode_hndlr

+#define EXTERN_OUI_FN(name) \

+	extern bool name##_oui_encode_hndlr(char *, char *, size_t)

+

+/* The handler declaration  for encoding OUI specific information should be

+ * here. The corresponding decoder handler should be in lldpad.

+ */

+

+

+/* The OUI specific handlers should be added here */

+

+vdptool_oui_hndlr_tbl_t oui_hndlr_tbl[] = {

+};

+

 static char *print_vdp_status(enum vdp22_cmd_status status)

 {

@@ -144,23 +160,137 @@ static void get_arg_value(char *str, char **arg, char **argval)

 	*arg = str;

 }

-static int render_cmd(struct cmd *cmd, int argc, char **args, char **argvals)

+static char *get_oui_name(char *argvals)

+{

+	char *oui_loc;

+

+	oui_loc = strchr(argvals, ',');

+	if (oui_loc == NULL)

+		return NULL;

+	*oui_loc = '\0';

+	return oui_loc + 1;

+}

+

+static void fill_oui_hdr(vdptool_oui_data_t *oui_data, char *oui_name)

+{

+	strncpy(oui_data->oui_name, oui_name, sizeof(oui_data->oui_name));

+	snprintf(oui_data->data, sizeof(oui_data->data), "%02x%s",

+		 (unsigned int)strlen(oui_data->oui_name), oui_data->oui_name);

+}

+

+static bool run_vdptool_oui_hndlr(vdptool_oui_data_t *oui_data, char *argvals)

+{

+	int cnt = 0, tbl_size;

+	char *dst;

+	size_t len = 0;

+

+	tbl_size = sizeof(oui_hndlr_tbl) / sizeof(vdptool_oui_hndlr_tbl_t);

+	for (cnt = 0; cnt < tbl_size; cnt++) {

+		if (!strncmp(oui_hndlr_tbl[cnt].oui_name, oui_data->oui_name,

+			     VDP22_OUI_MAX_NAME)) {

+			len = strlen(oui_data->data);

+			if (len >= sizeof(oui_data->data))

+				return false;

+			dst = oui_data->data + len;

+			return oui_hndlr_tbl[cnt].oui_cli_encode_hndlr(dst,

+								argvals, len);

+		}

+	}

+	return false;

+}

+

+/*

+ * The OUI can be input in many ways.

+ * It could be vdptool .... -c oui=companyA,Data1 -c oui=companyB,Data2 \

+ *			    -c oui=companyA,Data3

+ * Or

+ * vdptool .... -c oui=companyA,Data1Data3 -c oui=companyB,data2

+ * This function takes care of both the case cases

+ *

+ * Anything after the comma in OUI data field is Org specific and it's upto

+ * the respective organization specific handlers to encode it so that it could

+ * be decoded appropriately by the ORG specific handlers inside lldpad.

+ * That is, Data1 and Data3 is ORG companyA specific and the OUI handlers

+ * of ORG companyA in vdptool and lldpad is responsible for encoding/decoding.

+ *

+ * Irrespective of how the command line interface to vdptool is, the input to

+ * lldpad is always the same. i.e. KeywordlenKeywordDatalenData

+ * For OUI, the data field will have the complete OUI data starting with

+ * ORG name (e.g companyA). So, in order to call the right handler routine,

+ * the OUI data field is split as OUInamelenOUInameOUIData.

+ * OUInamelen is 2B.

+ */

+

+static bool rewrite_oui_argval(char *argvals, vdptool_oui_data_t **oui_data,

+			       int total_oui)

+{

+	char *new_oui_argvals, *new_oui_name, *exist_oui_name;

+	bool flag = true, ret = false;

+	int cnt;

+

+	new_oui_argvals = get_oui_name(argvals);

+	if (!new_oui_argvals) {

+		printf("Incorrect OUI Value, missing comma as delimited for "

+		       "OUI Type\n");

+		return false;

+	}

+	new_oui_name = argvals;

+	for (cnt = 0; cnt < total_oui; cnt++) {

+		if (!oui_data[cnt])

+			continue;

+		exist_oui_name = oui_data[cnt]->oui_name;

+		if (!strncmp(new_oui_name, exist_oui_name,

+			     VDP22_OUI_MAX_NAME)) {

+			flag = false;

+			break;

+		}

+	}

+	if (flag) {

+		oui_data[total_oui] = calloc(1, sizeof(vdptool_oui_data_t));

+		fill_oui_hdr(oui_data[total_oui], new_oui_name);

+		ret = run_vdptool_oui_hndlr(oui_data[total_oui],

+					    new_oui_argvals);

+	} else

+		ret = run_vdptool_oui_hndlr(oui_data[cnt], new_oui_argvals);

+	if (!ret)

+		return false;

+	return flag;

+}

+

+int render_cmd(struct cmd *cmd, int argc, char **args, char **argvals)

 {

 	int len;

 	int i;

 	int fid = 0, oui = 0;

+	vdptool_oui_data_t **oui_data;

+	bool is_new;

 	len = sizeof(cmd->obuf);

+	/* To avoid another loop to figure the number of OUI's */

+	oui_data = calloc(argc, sizeof(vdptool_oui_data_t *));

+	if (!oui_data) {

+		printf("Not enough memory\n");

+		return 0;

+	}

+

 	if ((cmd->cmd == cmd_settlv) || (cmd->cmd == cmd_gettlv)) {

 		for (i = 0; i < argc; i++) {

-			if (args[i]) {

-				if (!strncasecmp(args[i], "filter",

-						strlen("filter")))

-					fid++;

-				else if (!strncasecmp(args[i], "oui",

-						strlen("oui")))

+			if (!args[i])

+				continue;

+			if (!strncasecmp(args[i], "filter", strlen("filter")))

+				fid++;

+			else if (!strncasecmp(args[i], "oui", strlen("oui"))) {

+				is_new = rewrite_oui_argval(argvals[i],

+							    oui_data,

+							    oui);

+				if (is_new) {

+					argvals[i] = oui_data[oui]->data;

 					oui++;

+				} else {

+					args[i] = NULL;

+					argvals[i] = NULL;

+				}

 			}

 		}

 	}

@@ -182,6 +312,11 @@ static int render_cmd(struct cmd *cmd, int argc, char **args, char **argvals)

 				 len - strlen(cmd->obuf), "%04x%s",

 				 (unsigned int)strlen(argvals[i]), argvals[i]);

 	}

+	for (i = 0; i < oui; i++) {

+		if (oui_data[i])

+			free(oui_data[i]);

+	}

+	free(oui_data);

 	return strlen(cmd->obuf);

 }

-- 

2.1.0