From: x-fn-spp@sl.ntt-tx.co.jp
To: ferruh.yigit@intel.com, ogawa.yasufumi@lab.ntt.co.jp
Cc: spp@dpdk.org
Subject: [spp] [PATCH v2 2/7] spp_pcap: add command decode
Date: Fri, 8 Feb 2019 17:44:33 +0900 [thread overview]
Message-ID: <201902080844.x188ic3I030810@imss04.silk.ntt-tx.co.jp> (raw)
In-Reply-To: <20190208084438.7952-1-x-fn-spp@sl.ntt-tx.co.jp>
From: Hideyuki Yamashita <yamashita.hideyuki@po.ntt-tx.co.jp>
Add command decode part for start, stop and status.
Signed-off-by: Hideyuki Yamashita <yamashita.hideyuki@po.ntt-tx.co.jp>
Signed-off-by: Naoki Takada <takada.naoki@lab.ntt.co.jp>
---
src/pcap/command_dec.c | 187 +++++++++++++++++++++++++++++++++++++++++
src/pcap/command_dec.h | 110 ++++++++++++++++++++++++
2 files changed, 297 insertions(+)
create mode 100644 src/pcap/command_dec.c
create mode 100644 src/pcap/command_dec.h
diff --git a/src/pcap/command_dec.c b/src/pcap/command_dec.c
new file mode 100644
index 0000000..943ab0f
--- /dev/null
+++ b/src/pcap/command_dec.c
@@ -0,0 +1,187 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2019 Nippon Telegraph and Telephone Corporation
+ */
+
+#include <unistd.h>
+#include <string.h>
+
+#include <rte_ether.h>
+#include <rte_log.h>
+#include <rte_branch_prediction.h>
+
+#include "command_dec.h"
+
+#define RTE_LOGTYPE_SPP_COMMAND_DEC RTE_LOGTYPE_USER2
+
+/* set parse error */
+static inline int
+set_parse_error(struct spp_command_parse_error *error,
+ const int error_code, const char *error_name)
+{
+ error->code = error_code;
+
+ if (likely(error_name != NULL))
+ strcpy(error->value_name, error_name);
+
+ return error->code;
+}
+
+/* set parse error */
+static inline int
+set_string_value_parse_error(struct spp_command_parse_error *error,
+ const char *value, const char *error_name)
+{
+ strcpy(error->value, value);
+ return set_parse_error(error, BAD_VALUE, error_name);
+}
+
+/* Split command line parameter with spaces */
+static int
+parse_parameter_value(char *string, int max, int *argc, char *argv[])
+{
+ int cnt = 0;
+ const char *delim = " ";
+ char *argv_tok = NULL;
+ char *saveptr = NULL;
+
+ argv_tok = strtok_r(string, delim, &saveptr);
+ while (argv_tok != NULL) {
+ if (cnt >= max)
+ return SPP_RET_NG;
+ argv[cnt] = argv_tok;
+ cnt++;
+ argv_tok = strtok_r(NULL, delim, &saveptr);
+ }
+ *argc = cnt;
+
+ return SPP_RET_OK;
+}
+
+/* command list for parse */
+struct parse_command_list {
+ const char *name; /* Command name */
+ int param_min; /* Min number of parameters */
+ int param_max; /* Max number of parameters */
+ int (*func)(struct spp_command_request *request, int argc,
+ char *argv[], struct spp_command_parse_error *error,
+ int maxargc);
+ /* Pointer to command handling function */
+ enum spp_command_type type;
+ /* Command type */
+};
+
+/* command list */
+static struct parse_command_list command_list_pcap[] = {
+ { "_get_client_id", 1, 1, NULL, CMD_CLIENT_ID },
+ { "status", 1, 1, NULL, CMD_STATUS },
+ { "exit", 1, 1, NULL, CMD_EXIT },
+ { "start", 1, 1, NULL, CMD_START },
+ { "stop", 1, 1, NULL, CMD_STOP },
+ { "", 0, 0, NULL, 0 } /* termination */
+};
+
+/* Parse command line parameters */
+static int
+parse_command_in_list(struct spp_command_request *request,
+ const char *request_str,
+ struct spp_command_parse_error *error)
+{
+ int ret = SPP_RET_OK;
+ int command_name_check = 0;
+ struct parse_command_list *list = NULL;
+ int i = 0;
+ int argc = 0;
+ char *argv[SPP_CMD_MAX_PARAMETERS];
+ char tmp_str[SPP_CMD_MAX_PARAMETERS*SPP_CMD_VALUE_BUFSZ];
+ memset(argv, 0x00, sizeof(argv));
+ memset(tmp_str, 0x00, sizeof(tmp_str));
+
+ strcpy(tmp_str, request_str);
+ ret = parse_parameter_value(tmp_str, SPP_CMD_MAX_PARAMETERS,
+ &argc, argv);
+ if (ret < SPP_RET_OK) {
+ RTE_LOG(ERR, SPP_COMMAND_DEC, "Parameter number over limit."
+ "request_str=%s\n", request_str);
+ return set_parse_error(error, BAD_FORMAT, NULL);
+ }
+ RTE_LOG(DEBUG, SPP_COMMAND_DEC, "Decode array. num=%d\n", argc);
+
+ for (i = 0; command_list_pcap[i].name[0] != '\0'; i++) {
+ list = &command_list_pcap[i];
+ if (strcmp(argv[0], list->name) != 0)
+ continue;
+
+ if (unlikely(argc < list->param_min) ||
+ unlikely(list->param_max < argc)) {
+ command_name_check = 1;
+ continue;
+ }
+
+ request->commands[0].type = command_list_pcap[i].type;
+ if (list->func != NULL)
+ return (*list->func)(request, argc, argv, error,
+ list->param_max);
+
+ return SPP_RET_OK;
+ }
+
+ if (command_name_check != 0) {
+ RTE_LOG(ERR, SPP_COMMAND_DEC, "Parameter number out of range."
+ "request_str=%s\n", request_str);
+ return set_parse_error(error, BAD_FORMAT, NULL);
+ }
+
+ RTE_LOG(ERR, SPP_COMMAND_DEC,
+ "Unknown command. command=%s, request_str=%s\n",
+ argv[0], request_str);
+ return set_string_value_parse_error(error, argv[0], "command");
+}
+
+/* parse request from no-null-terminated string */
+int
+spp_command_parse_request(
+ struct spp_command_request *request,
+ const char *request_str, size_t request_str_len,
+ struct spp_command_parse_error *error)
+{
+ int ret = SPP_RET_NG;
+ int i;
+
+ /* parse request */
+ request->num_command = 1;
+ ret = parse_command_in_list(request, request_str, error);
+ if (unlikely(ret != SPP_RET_OK)) {
+ RTE_LOG(ERR, SPP_COMMAND_DEC,
+ "Cannot parse command request. "
+ "ret=%d, request_str=%.*s\n",
+ ret, (int)request_str_len, request_str);
+ return ret;
+ }
+ request->num_valid_command = 1;
+
+ /* check getter command */
+ for (i = 0; i < request->num_valid_command; ++i) {
+ switch (request->commands[i].type) {
+ case CMD_CLIENT_ID:
+ request->is_requested_client_id = 1;
+ break;
+ case CMD_STATUS:
+ request->is_requested_status = 1;
+ break;
+ case CMD_EXIT:
+ request->is_requested_exit = 1;
+ break;
+ case CMD_START:
+ request->is_requested_start = 1;
+ break;
+ case CMD_STOP:
+ request->is_requested_stop = 1;
+ break;
+ default:
+ /* nothing to do */
+ break;
+ }
+ }
+
+ return ret;
+}
diff --git a/src/pcap/command_dec.h b/src/pcap/command_dec.h
new file mode 100644
index 0000000..0835382
--- /dev/null
+++ b/src/pcap/command_dec.h
@@ -0,0 +1,110 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2019 Nippon Telegraph and Telephone Corporation
+ */
+
+#ifndef _SPP_PCAP_COMMAND_DEC_H_
+#define _SPP_PCAP_COMMAND_DEC_H_
+
+/**
+ * @file
+ * SPP pcap command parse
+ *
+ * Decode and validate the command message string.
+ */
+
+#include "spp_proc.h"
+
+/** max number of command per request */
+#define SPP_CMD_MAX_COMMANDS 32
+
+/** maximum number of parameters per command */
+#define SPP_CMD_MAX_PARAMETERS 8
+
+/** command name string buffer size (include null char) */
+#define SPP_CMD_NAME_BUFSZ 32
+
+/** command value string buffer size (include null char) */
+#define SPP_CMD_VALUE_BUFSZ 111
+
+/** parse error code */
+enum spp_command_parse_error_code {
+ /* not use 0, in general 0 is OK */
+ BAD_FORMAT = 1, /**< Wrong format */
+ UNKNOWN_COMMAND, /**< Unknown command */
+ NO_PARAM, /**< No parameters */
+ BAD_TYPE, /**< Wrong data type */
+ BAD_VALUE, /**< Wrong value */
+};
+
+/**
+ * spp command type.
+ *
+ * @attention This enumerated type must have the same order of command_list
+ * defined in command_dec_pcap.c
+ */
+enum spp_command_type {
+ /** get_client_id command */
+ CMD_CLIENT_ID,
+
+ /** status command */
+ CMD_STATUS,
+
+ /** exit command */
+ CMD_EXIT,
+
+ /** start command */
+ CMD_START,
+
+ /** stop command */
+ CMD_STOP,
+
+};
+
+/** command parameters */
+struct spp_command {
+ enum spp_command_type type; /**< Command type */
+};
+
+/** request parameters */
+struct spp_command_request {
+ int num_command; /**< Number of accepted commands */
+ int num_valid_command; /**< Number of executed commands */
+ struct spp_command commands[SPP_CMD_MAX_COMMANDS];
+ /**<Information of executed commands */
+
+ int is_requested_client_id; /**< Id for get_client_id command */
+ int is_requested_status; /**< Id for status command */
+ int is_requested_exit; /**< Id for exit command */
+ int is_requested_start; /**< Id for start command */
+ int is_requested_stop; /**< Id for stop command */
+};
+
+/** parse error information */
+struct spp_command_parse_error {
+ int code; /**< Error code */
+ char value_name[SPP_CMD_NAME_BUFSZ]; /**< Error value name */
+ char value[SPP_CMD_VALUE_BUFSZ]; /**< Error value */
+};
+
+/**
+ * parse request from no-null-terminated string
+ *
+ * @param request
+ * The pointer to struct spp_command_request.@n
+ * The result value of decoding the command message.
+ * @param request_str
+ * The pointer to requested command message.
+ * @param request_str_len
+ * The length of requested command message.
+ * @param error
+ * The pointer to struct spp_command_parse_error.@n
+ * Detailed error information will be stored.
+ *
+ * @retval SPP_RET_OK succeeded.
+ * @retval !0 failed.
+ */
+int spp_command_parse_request(struct spp_command_request *request,
+ const char *request_str, size_t request_str_len,
+ struct spp_command_parse_error *error);
+
+#endif /* _COMMAND_DEC_H_ */
--
2.17.1
next prev parent reply other threads:[~2019-02-08 8:46 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190208084438.7952-1-x-fn-spp@sl.ntt-tx.co.jp>
2019-02-08 8:44 ` [spp] [PATCH v2 1/7] spp_pcap: add command main x-fn-spp
2019-02-08 8:44 ` x-fn-spp [this message]
2019-02-08 8:44 ` [spp] [PATCH v2 3/7] spp_pcap: add management function x-fn-spp
2019-02-08 8:44 ` [spp] [PATCH v2 4/7] spp_pcap: add spp_pcap main function x-fn-spp
2019-02-08 8:44 ` [spp] [PATCH v2 5/7] spp_pcap: add Makefile for spp_pcap x-fn-spp
2019-02-08 8:44 ` [spp] [PATCH v2 6/7] controller: add SppPcap class x-fn-spp
2019-02-08 8:44 ` [spp] [PATCH v2 7/7] controller: add pcap command to SPP controller x-fn-spp
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