lib/kmi/mi.c

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/*
 * $Id: mi.c 4565 2008-08-05 14:58:52Z klaus_darilion $
 *
 * Copyright (C) 2006 Voice Sistem SRL
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * Kamailio is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Kamailio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 *
 * History:
 * ---------
 *  2006-09-08  first version (bogdan)
 */

#include <string.h>

#include "../../dprint.h"
#include "../../sr_module.h"
#include "mi_mem.h"
#include "mi.h"

static struct mi_cmd*  mi_cmds = 0;
static int mi_cmds_no = 0;


static inline int get_mi_id( char *name, int len)
{
        int n;
        int i;

        for( n=0,i=0 ; i<len ; n+=name[i] ,i++ );
        return n;
}


static inline struct mi_cmd* lookup_mi_cmd_id(int id,char *name, int len)
{
        int i;

        for( i=0 ; i<mi_cmds_no ; i++ ) {
                if ( id==mi_cmds[i].id && len==mi_cmds[i].name.len &&
                memcmp(mi_cmds[i].name.s,name,len)==0 )
                        return &mi_cmds[i];
        }

        return 0;
}


int register_mi_mod( char *mod_name, mi_export_t *mis)
{
        int ret;
        int i;

        if (mis==0)
                return 0;

        for ( i=0 ; mis[i].name ; i++ ) {
                ret = register_mi_cmd( mis[i].cmd, mis[i].name, mis[i].param,
                        mis[i].init_f, mis[i].flags);
                if (ret!=0) {
                        LM_ERR("failed to register cmd <%s> for module %s\n",
                                        mis[i].name,mod_name);
                }
        }
        return 0;
}


static int mi_commands_initialized = 0;


int init_mi_child(int rank, int mode)
{
        int i;

        if(mi_commands_initialized)
                return 0;
        mi_commands_initialized = 1;
        for ( i=0 ; i<mi_cmds_no ; i++ ) {
                if ( mi_cmds[i].init_f && mi_cmds[i].init_f()!=0 ) {
                        LM_ERR("failed to init <%.*s>\n",
                                        mi_cmds[i].name.len,mi_cmds[i].name.s);
                        return -1;
                }
        }
        if(mode==1) {
                if(is_sip_worker(rank)) {
                        LM_DBG("initalizing proc rpc for sip handling\n");
                        if(init_child(PROC_SIPRPC)<0) {
                                LM_ERR("failed to init proc rpc for sip handling\n");
                                return -1;
                        }
                }
        }
        return 0;
}



int register_mi_cmd( mi_cmd_f f, char *name, void *param,
                                                                        mi_child_init_f in, unsigned int flags)
{
        struct mi_cmd *cmds;
        int id;
        int len;

        if (f==0 || name==0) {
                LM_ERR("invalid params f=%p, name=%s\n", f, name);
                return -1;
        }

        if (flags&MI_NO_INPUT_FLAG && flags&MI_ASYNC_RPL_FLAG) {
                LM_ERR("invalids flags for <%s> - "
                        "async functions must take input\n",name);
        }

        len = strlen(name);
        id = get_mi_id(name,len);

        if (lookup_mi_cmd_id( id, name, len)) {
                LM_ERR("command <%.*s> already registered\n", len, name);
                return -1;
        }

        cmds = (struct mi_cmd*)mi_realloc( mi_cmds,
                        (mi_cmds_no+1)*sizeof(struct mi_cmd) );
        if (cmds==0) {
                LM_ERR("no more pkg memory\n");
                return -1;
        }

        mi_cmds = cmds;
        mi_cmds_no++;

        cmds = &cmds[mi_cmds_no-1];

        cmds->f = f;
        cmds->init_f = in;
        cmds->flags = flags;
        cmds->name.s = name;
        cmds->name.len = len;
        cmds->id = id;
        cmds->param = param;

        return 0;
}


struct mi_cmd* lookup_mi_cmd( char *name, int len)
{
        int id;

        id = get_mi_id(name,len);
        return lookup_mi_cmd_id( id, name, len);
}


void get_mi_cmds( struct mi_cmd** cmds, int *size)
{
        *cmds = mi_cmds;
        *size = mi_cmds_no;
}