mirror of
https://github.com/acanas/swad-core.git
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216 lines
7.8 KiB
C
216 lines
7.8 KiB
C
// swad_MAC.c: MAC addresses
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/*
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SWAD (Shared Workspace At a Distance),
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is a web platform developed at the University of Granada (Spain),
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and used to support university teaching.
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This file is part of SWAD core.
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Copyright (C) 1999-2024 Antonio Cañas Vargas
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*****************************************************************************/
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/********************************** Headers **********************************/
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/*****************************************************************************/
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#include <stddef.h> // For NULL
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#include "swad_action.h"
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#include "swad_action_list.h"
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#include "swad_database.h"
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#include "swad_form.h"
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#include "swad_global.h"
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#include "swad_HTML.h"
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#include "swad_MAC.h"
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#include "swad_parameter.h"
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#include "swad_parameter_code.h"
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/*****************************************************************************/
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/******************************* Private types *******************************/
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/*****************************************************************************/
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/* Parameters used in forms to edit MAC address */
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struct MAC_Pars
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{
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long RooCod; // Room code
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char MACstr[MAC_LENGTH_MAC_ADDRESS + 1]; // MAC address
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};
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/*****************************************************************************/
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/***************************** Private prototypes ****************************/
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/*****************************************************************************/
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static void MAC_PutPars (void *Args);
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static void MAC_PutFormToEditMACAddress (Act_Action_t NextAction,const char *Anchor,
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void (*FuncPars) (void *Args),void *Args);
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/*****************************************************************************/
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/**************** Put hidden parameters to edit a MAC address ****************/
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/*****************************************************************************/
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static void MAC_PutPars (void *Args)
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{
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if (Args)
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{
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ParCod_PutPar (ParCod_Roo,((struct MAC_Pars *) Args)->RooCod);
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Par_PutParString (NULL,"MAC",((struct MAC_Pars *) Args)->MACstr);
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}
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}
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/*****************************************************************************/
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/************************ Put form to edit a MAC address *********************/
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/*****************************************************************************/
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static void MAC_PutFormToEditMACAddress (Act_Action_t NextAction,const char *Anchor,
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void (*FuncPars) (void *Args),void *Args)
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{
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/***** Form to enter a new MAC address *****/
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Frm_BeginFormAnchor (NextAction,Anchor);
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FuncPars (Args);
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HTM_INPUT_TEXT ("NewMAC",MAC_LENGTH_MAC_ADDRESS,((struct MAC_Pars *) Args)->MACstr,
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HTM_SUBMIT_ON_CHANGE,
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"size=\"8\" class=\"INPUT_%s\"",The_GetSuffix ());
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Frm_EndForm ();
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}
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/*****************************************************************************/
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/************************ List several MAC addresses *************************/
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/*****************************************************************************/
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void MAC_ListMACAddresses (unsigned NumMACs,MYSQL_RES **mysql_res)
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{
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MYSQL_ROW row;
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unsigned NumMAC;
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unsigned long long MACnum;
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char MACstr[MAC_LENGTH_MAC_ADDRESS + 1];
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/***** Write the MAC addresses *****/
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for (NumMAC = 0;
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NumMAC < NumMACs;
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NumMAC++)
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{
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/* Get next MAC address */
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row = mysql_fetch_row (*mysql_res);
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/* Write break line */
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if (NumMAC)
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HTM_BR ();
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/* Write MAC address (row[0]) */
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if (sscanf (row[0],"%llu",&MACnum) == 1)
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{
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MAC_MACnumToMACstr (MACnum,MACstr);
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HTM_Txt (MACstr);
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}
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}
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/***** Free structure that stores the query result *****/
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DB_FreeMySQLResult (mysql_res);
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}
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/*****************************************************************************/
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/************************ List several MAC addresses *************************/
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/*****************************************************************************/
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void MAC_EditMACAddresses (long RooCod,const char *Anchor,
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unsigned NumMACs,MYSQL_RES **mysql_res)
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{
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MYSQL_ROW row;
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unsigned NumMAC;
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unsigned long long MACnum;
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struct MAC_Pars Pars;
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/***** Write the forms to enter the MAC addresses *****/
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for (NumMAC = 0;
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NumMAC < NumMACs;
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NumMAC++)
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{
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/* Get next MAC address */
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row = mysql_fetch_row (*mysql_res);
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/* Write MAC address (row[0]) */
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if (sscanf (row[0],"%llu",&MACnum) == 1)
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{
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Pars.RooCod = RooCod; // Code (i.e. room code)
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MAC_MACnumToMACstr (MACnum,Pars.MACstr); // Current MAC address in xx:xx:xx:xx:xx:xx format
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MAC_PutFormToEditMACAddress (ActChgRooMAC,Anchor,
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MAC_PutPars,&Pars);
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/* Write break line */
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HTM_BR ();
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}
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}
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/* Form to enter a new MAC address */
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Pars.RooCod = RooCod; // Room code
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Pars.MACstr[0] = '\0'; // Current MAC address in xx:xx:xx:xx:xx:xx format
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MAC_PutFormToEditMACAddress (ActChgRooMAC,Anchor,
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MAC_PutPars,&Pars);
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/***** Free structure that stores the query result *****/
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DB_FreeMySQLResult (mysql_res);
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}
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/*****************************************************************************/
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/****************** Get MAC address as a number from a form ******************/
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/*****************************************************************************/
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unsigned long long MAC_GetMACnumFromForm (const char *ParName)
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{
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char MACstr[MAC_LENGTH_MAC_ADDRESS * Str_MAX_BYTES_PER_CHAR + 1];
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unsigned long long MAC[MAC_NUM_BYTES];
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unsigned long long MACnum;
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/***** Get parameter *****/
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Par_GetParText (ParName,MACstr,MAC_LENGTH_MAC_ADDRESS * Str_MAX_BYTES_PER_CHAR);
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if (MACstr[0]) // Not empty
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{
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/***** Try to scan it in xx:xx:xx:xx:xx:xx format (where x are hexadecimal digits) *****/
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if (sscanf (MACstr,"%02llx:%02llx:%02llx:%02llx:%02llx:%02llx",
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&MAC[0],&MAC[1],&MAC[2],&MAC[3],&MAC[4],&MAC[5]) == MAC_NUM_BYTES)
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return (MAC[0] << (CHAR_BIT * 5)) +
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(MAC[1] << (CHAR_BIT * 4)) +
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(MAC[2] << (CHAR_BIT * 3)) +
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(MAC[3] << (CHAR_BIT * 2)) +
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(MAC[4] << (CHAR_BIT * 1)) +
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(MAC[5] << (CHAR_BIT * 0));
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/***** Try to scan it in xxxxxxxxxxxx format (where x are hexadecimal digits) ******/
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if (sscanf (MACstr,"%llx",&MACnum) == 1)
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return MACnum;
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}
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return 0;
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}
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/*****************************************************************************/
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/**** Convert from MAC as a number to string in xx:xx:xx:xx:xx:xx format *****/
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/*****************************************************************************/
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void MAC_MACnumToMACstr (unsigned long long MACnum,char MACstr[MAC_LENGTH_MAC_ADDRESS + 1])
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{
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if (MACnum)
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snprintf (MACstr,MAC_LENGTH_MAC_ADDRESS + 1,"%02x:%02x:%02x:%02x:%02x:%02x",
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(unsigned char) ((MACnum >> (CHAR_BIT * 5)) & ((1 << CHAR_BIT) - 1)),
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(unsigned char) ((MACnum >> (CHAR_BIT * 4)) & ((1 << CHAR_BIT) - 1)),
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(unsigned char) ((MACnum >> (CHAR_BIT * 3)) & ((1 << CHAR_BIT) - 1)),
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(unsigned char) ((MACnum >> (CHAR_BIT * 2)) & ((1 << CHAR_BIT) - 1)),
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(unsigned char) ((MACnum >> (CHAR_BIT * 1)) & ((1 << CHAR_BIT) - 1)),
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(unsigned char) ((MACnum >> (CHAR_BIT * 0)) & ((1 << CHAR_BIT) - 1)));
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else
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MACstr[0] = '\0';
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}
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