SuperNET/iguana/SuperNET_hexmsg.c

/******************************************************************************
 * Copyright © 2014-2016 The SuperNET Developers.                             *
 *                                                                            *
 * See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at                  *
 * the top-level directory of this distribution for the individual copyright  *
 * holder information and the developer policies on copyright and licensing.  *
 *                                                                            *
 * Unless otherwise agreed in a custom licensing agreement, no part of the    *
 * SuperNET software, including this file may be copied, modified, propagated *
 * or distributed except according to the terms contained in the LICENSE file *
 *                                                                            *
 * Removal or modification of this copyright notice is prohibited.            *
 *                                                                            *
 ******************************************************************************/

#include "iguana777.h"

int32_t SuperNET_hexmsgfind(struct supernet_info *myinfo,bits256 category,bits256 subhash,char *hexmsg,int32_t addflag)
{
    static int lastpurge; static uint64_t Packetcache[1024];
    bits256 packethash; int32_t i,datalen;
    datalen = (int32_t)strlen(hexmsg) + 1;
    vcalc_sha256(0,packethash.bytes,(void *)hexmsg,datalen);
    if ( bits256_nonz(category) == 0 )
        category = GENESIS_PUBKEY;
    if ( bits256_nonz(subhash) == 0 )
        subhash = GENESIS_PUBKEY;
    packethash = curve25519(category,packethash);
    //printf("addflag.%d packethash.%llx dest.%llx\n",addflag,(long long)packethash.txid,(long long)category.txid);
    for (i=0; i<sizeof(Packetcache)/sizeof(*Packetcache); i++)
    {
        if ( Packetcache[i] == 0 )
        {
            if ( addflag != 0 )
            {
                Packetcache[i] = packethash.txid;
                //printf("add.%llx packetcache(%s) -> slot[%d]\n",(long long)packethash.txid,hexmsg,i);
            }
            break;
        }
        else if ( Packetcache[i] == packethash.txid )
        {
            printf("SuperNET_DHTsend reject duplicate packet.%llx\n",(long long)packethash.txid);
            return(i);
        }
    }
    if ( i == sizeof(Packetcache)/sizeof(*Packetcache) )
    {
        if ( addflag != 0 )
        {
            printf("purge slot[%d]\n",lastpurge);
            Packetcache[lastpurge++] = packethash.txid;
            if ( lastpurge >= sizeof(Packetcache)/sizeof(*Packetcache) )
                lastpurge = 0;
        }
    }
    return(-1);
}

void SuperNET_hexmsgadd(struct supernet_info *myinfo,bits256 categoryhash,bits256 subhash,char *hexmsg,struct tai now,char *remoteaddr)
{
    char str[512],str2[65];
    str[0] = 0;
    if ( memcmp(categoryhash.bytes,GENESIS_PUBKEY.bytes,sizeof(categoryhash)) == 0 )
        strcpy(str,"BROADCAST.");
    else bits256_str(str+strlen(str),categoryhash);
    if ( memcmp(subhash.bytes,GENESIS_PUBKEY.bytes,sizeof(subhash)) != 0 )
    {
        bits256_str(str2,subhash);
        strcat(str,str2);
    }
    category_posthexmsg(myinfo,categoryhash,subhash,hexmsg,now,remoteaddr);
    //printf("HEXMSG.(%s).%llx -> %s\n",hexmsg,(long long)subhash.txid,str);
}

void SuperNET_hexmsgprocess(struct supernet_info *myinfo,cJSON *json,char *hexmsg,char *remoteaddr)
{
    int32_t len,flag=0; char *str; uint8_t _buf[8192],*buf = _buf; bits256 categoryhash; struct category_info *cat;
    if ( hexmsg != 0 )
    {
        len = (int32_t)strlen(hexmsg);
        if ( is_hexstr(hexmsg,len) > 0 )
        {
            len >>= 1;
            if ( len > sizeof(_buf) )
                buf = malloc(len);
            decode_hex(buf,len,hexmsg);
            categoryhash = jbits256(json,"categoryhash");
            if ( (cat= category_find(categoryhash,GENESIS_PUBKEY)) != 0 )
            {
                if ( cat->processfunc != 0 )
                {
                    if ( (str= (*cat->processfunc)(myinfo,buf,len,remoteaddr)) != 0 )
                        free(str);
                    flag = 1;
                    //printf("PROCESSFUNC\n");
                }
            }
            if ( flag == 0 )
            {
                printf("no processfunc, posthexmsg\n");
                category_posthexmsg(myinfo,categoryhash,jbits256(json,"subhash"),hexmsg,tai_now(),remoteaddr);
            }
            //char str[65]; printf("HEXPROCESS.(%s) -> %s\n",hexmsg,bits256_str(str,categoryhash));
            if ( buf != _buf )
                free(buf);
        }
    }
}