examples/cmdline/commands.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation.
 * Copyright (c) 2009, Olivier MATZ <zer0@droids-corp.org>
 * All rights reserved.
 */

#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>

#include <cmdline_rdline.h>
#include <cmdline_parse.h>
#include <cmdline_parse_ipaddr.h>
#include <cmdline_parse_num.h>
#include <cmdline_parse_string.h>
#include <cmdline.h>

#include <rte_string_fns.h>

#include "parse_obj_list.h"

struct object_list global_obj_list;

/* not defined under linux */
#ifndef NIPQUAD
#define NIPQUAD_FMT "%u.%u.%u.%u"
#define NIPQUAD(addr)               \
    (unsigned)((unsigned char *)&addr)[0],  \
    (unsigned)((unsigned char *)&addr)[1],  \
    (unsigned)((unsigned char *)&addr)[2],  \
    (unsigned)((unsigned char *)&addr)[3]
#endif

#ifndef NIP6
#define NIP6_FMT "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x"
#define NIP6(addr)                  \
    (unsigned)((addr).s6_addr[0]),          \
    (unsigned)((addr).s6_addr[1]),          \
    (unsigned)((addr).s6_addr[2]),          \
    (unsigned)((addr).s6_addr[3]),          \
    (unsigned)((addr).s6_addr[4]),          \
    (unsigned)((addr).s6_addr[5]),          \
    (unsigned)((addr).s6_addr[6]),          \
    (unsigned)((addr).s6_addr[7]),          \
    (unsigned)((addr).s6_addr[8]),          \
    (unsigned)((addr).s6_addr[9]),          \
    (unsigned)((addr).s6_addr[10]),         \
    (unsigned)((addr).s6_addr[11]),         \
    (unsigned)((addr).s6_addr[12]),         \
    (unsigned)((addr).s6_addr[13]),         \
    (unsigned)((addr).s6_addr[14]),         \
    (unsigned)((addr).s6_addr[15])
#endif


/**********************************************************/

/* Show or delete tokens. 8< */
struct cmd_obj_del_show_result {
    cmdline_fixed_string_t action;
    struct object *obj;
};

static void cmd_obj_del_show_parsed(void *parsed_result,
                    struct cmdline *cl,
                    __rte_unused void *data)
{
    struct cmd_obj_del_show_result *res = parsed_result;
    char ip_str[INET6_ADDRSTRLEN];

    if (res->obj->ip.family == AF_INET)
        snprintf(ip_str, sizeof(ip_str), NIPQUAD_FMT,
             NIPQUAD(res->obj->ip.addr.ipv4));
    else
        snprintf(ip_str, sizeof(ip_str), NIP6_FMT,
             NIP6(res->obj->ip.addr.ipv6));

    if (strcmp(res->action, "del") == 0) {
        SLIST_REMOVE(&global_obj_list, res->obj, object, next);
        cmdline_printf(cl, "Object %s removed, ip=%s\n",
                   res->obj->name, ip_str);
        free(res->obj);
    }
    else if (strcmp(res->action, "show") == 0) {
        cmdline_printf(cl, "Object %s, ip=%s\n",
                   res->obj->name, ip_str);
    }
}

cmdline_parse_token_string_t cmd_obj_action =
    TOKEN_STRING_INITIALIZER(struct cmd_obj_del_show_result,
                 action, "show#del");
parse_token_obj_list_t cmd_obj_obj =
    TOKEN_OBJ_LIST_INITIALIZER(struct cmd_obj_del_show_result, obj,
                   &global_obj_list);

cmdline_parse_inst_t cmd_obj_del_show = {
    .f = cmd_obj_del_show_parsed,  /* function to call */
    .data = NULL,      /* 2nd arg of func */
    .help_str = "Show/del an object",
    .tokens = {        /* token list, NULL terminated */
        (void *)&cmd_obj_action,
        (void *)&cmd_obj_obj,
        NULL,
    },
};
/* >8 End of show or delete tokens. */

/**********************************************************/

struct cmd_obj_add_result {
    cmdline_fixed_string_t action;
    cmdline_fixed_string_t name;
    cmdline_ipaddr_t ip;
};

static void cmd_obj_add_parsed(void *parsed_result,
                   struct cmdline *cl,
                   __rte_unused void *data)
{
    struct cmd_obj_add_result *res = parsed_result;
    struct object *o;
    char ip_str[INET6_ADDRSTRLEN];

    SLIST_FOREACH(o, &global_obj_list, next) {
        if (!strcmp(res->name, o->name)) {
            cmdline_printf(cl, "Object %s already exist\n", res->name);
            return;
        }
        break;
    }

    o = malloc(sizeof(*o));
    if (!o) {
        cmdline_printf(cl, "mem error\n");
        return;
    }
    strlcpy(o->name, res->name, sizeof(o->name));
    o->ip = res->ip;
    SLIST_INSERT_HEAD(&global_obj_list, o, next);

    if (o->ip.family == AF_INET)
        snprintf(ip_str, sizeof(ip_str), NIPQUAD_FMT,
             NIPQUAD(o->ip.addr.ipv4));
    else
        snprintf(ip_str, sizeof(ip_str), NIP6_FMT,
             NIP6(o->ip.addr.ipv6));

    cmdline_printf(cl, "Object %s added, ip=%s\n",
               o->name, ip_str);
}

cmdline_parse_token_string_t cmd_obj_action_add =
    TOKEN_STRING_INITIALIZER(struct cmd_obj_add_result, action, "add");
cmdline_parse_token_string_t cmd_obj_name =
    TOKEN_STRING_INITIALIZER(struct cmd_obj_add_result, name, NULL);
cmdline_parse_token_ipaddr_t cmd_obj_ip =
    TOKEN_IPADDR_INITIALIZER(struct cmd_obj_add_result, ip);

cmdline_parse_inst_t cmd_obj_add = {
    .f = cmd_obj_add_parsed,  /* function to call */
    .data = NULL,      /* 2nd arg of func */
    .help_str = "Add an object (name, val)",
    .tokens = {        /* token list, NULL terminated */
        (void *)&cmd_obj_action_add,
        (void *)&cmd_obj_name,
        (void *)&cmd_obj_ip,
        NULL,
    },
};

/**********************************************************/

struct cmd_help_result {
    cmdline_fixed_string_t help;
};

static void cmd_help_parsed(__rte_unused void *parsed_result,
                struct cmdline *cl,
                __rte_unused void *data)
{
    cmdline_printf(cl,
               "Demo example of command line interface in RTE\n\n"
               "This is a readline-like interface that can be used to\n"
               "debug your RTE application. It supports some features\n"
               "of GNU readline like completion, cut/paste, and some\n"
               "other special bindings.\n\n"
               "This demo shows how rte_cmdline library can be\n"
               "extended to handle a list of objects. There are\n"
               "3 commands:\n"
               "- add obj_name IP\n"
               "- del obj_name\n"
               "- show obj_name\n\n");
}

cmdline_parse_token_string_t cmd_help_help =
    TOKEN_STRING_INITIALIZER(struct cmd_help_result, help, "help");

cmdline_parse_inst_t cmd_help = {
    .f = cmd_help_parsed,  /* function to call */
    .data = NULL,      /* 2nd arg of func */
    .help_str = "show help",
    .tokens = {        /* token list, NULL terminated */
        (void *)&cmd_help_help,
        NULL,
    },
};


/**********************************************************/
/**********************************************************/
/****** CONTEXT (list of instruction) */

/* Cmdline context list of commands in NULL-terminated table. 8< */
cmdline_parse_ctx_t main_ctx[] = {
    (cmdline_parse_inst_t *)&cmd_obj_del_show,
    (cmdline_parse_inst_t *)&cmd_obj_add,
    (cmdline_parse_inst_t *)&cmd_help,
    NULL,
};
/* >8 End of context list. */