proxmark3/client/cmdparser.c

//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Command parser
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
#include "ui.h"
#include "cmdparser.h"
#include "proxmark3.h"
#include "comms.h"

void CmdsHelp(const command_t Commands[]) {
    if (Commands[0].Name == NULL) return;
    int i = 0;
    while (Commands[i].Name) {
        if (!IsOffline() || Commands[i].Offline)
            PrintAndLogEx(NORMAL, "%-16s %s", Commands[i].Name, Commands[i].Help);
        ++i;
    }
}

int CmdsParse(const command_t Commands[], const char *Cmd) {
    // Help dump children
    if (strcmp(Cmd, "XX_internal_command_dump_XX") == 0) {
        dumpCommandsRecursive(Commands, 0);
        return 0;
    }
    // Markdown help dump children
    if (strcmp(Cmd, "XX_internal_command_dump_markdown_XX") == 0) {
        dumpCommandsRecursive(Commands, 1);
        return 0;
    }
    char cmd_name[128];
    int len = 0;
    memset(cmd_name, 0, sizeof(cmd_name));
    sscanf(Cmd, "%127s%n", cmd_name, &len);
    str_lower(cmd_name);
    int i = 0;
    while (Commands[i].Name && strcmp(Commands[i].Name, cmd_name))
        ++i;

    /* try to find exactly one prefix-match */
    if (!Commands[i].Name) {
        int last_match = 0;
        int matches = 0;

        for (i = 0; Commands[i].Name; i++) {
            if (!strncmp(Commands[i].Name, cmd_name, strlen(cmd_name))) {
                last_match = i;
                matches++;
            }
        }
        if (matches == 1) i = last_match;
    }

    if (Commands[i].Name) {
        while (Cmd[len] == ' ')
            ++len;
        return Commands[i].Parse(Cmd + len);
    } else {
        // show help for selected hierarchy or if command not recognised
        CmdsHelp(Commands);
    }

    return 0;
}

char pparent[512] = {0};
char *parent = pparent;

void dumpCommandsRecursive(const command_t cmds[], int markdown) {
    if (cmds[0].Name == NULL) return;

    int i = 0;
    int w_cmd = 25;
    int w_off = 8;
    // First, dump all single commands, which are not a container for
    // other commands
    if (markdown) {
        PrintAndLogEx(NORMAL, "|%-*s|%-*s|%s\n", w_cmd, "command", w_off, "offline", "description");
        PrintAndLogEx(NORMAL, "|%-*s|%-*s|%s\n", w_cmd, "-------", w_off, "-------", "-----------");
    } else {
        PrintAndLogEx(NORMAL, "%-*s|%-*s|%s\n", w_cmd, "command", w_off, "offline", "description");
        PrintAndLogEx(NORMAL, "%-*s|%-*s|%s\n", w_cmd, "-------", w_off, "-------", "-----------");
    }

    while (cmds[i].Name) {
        const char *cmd_offline = "N";
        if (cmds[i].Help[0] == '{' && ++i) continue;

        if (cmds[i].Offline)
            cmd_offline = "Y";
        if (markdown)
            PrintAndLogEx(NORMAL, "|`%s%-*s`|%-*s|`%s`\n", parent, w_cmd - (int)strlen(parent) - 2, cmds[i].Name, w_off, cmd_offline, cmds[i].Help);
        else
            PrintAndLogEx(NORMAL, "%s%-*s|%-*s|%s\n", parent, w_cmd - (int)strlen(parent), cmds[i].Name, w_off, cmd_offline, cmds[i].Help);
        ++i;
    }
    PrintAndLogEx(NORMAL, "\n\n");
    i = 0;

    // Then, print the categories. These will go into subsections with their own tables
    while (cmds[i].Name) {
        if (cmds[i].Help[0] != '{' && ++i)  continue;

        PrintAndLogEx(NORMAL, "### %s%s\n\n %s\n\n", parent, cmds[i].Name, cmds[i].Help);

        char currentparent[512] = {0};
        snprintf(currentparent, sizeof currentparent, "%s%s ", parent, cmds[i].Name);
        char *old_parent = parent;
        parent = currentparent;
        // This is what causes the recursion, since commands Parse-implementation
        // in turn calls the CmdsParse above.
        if (markdown)
            cmds[i].Parse("XX_internal_command_dump_markdown_XX");
        else
            cmds[i].Parse("XX_internal_command_dump_XX");

        parent = old_parent;
        ++i;
    }
}