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c-multiaddr/protoutils.h

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#ifndef PROTOUTILS
#define PROTOUTILS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <inttypes.h>
#include <ctype.h>
#include "base58.h"
#include "varhexutils.h"
#include "protocols.h"
//IP2INT
//IPv4 VALIDATOR
#define DELIM "."
/* return 1 if string contain only digits, else return 0 */
int valid_digit(char *ip_str)
{
int err = 0;
while (*ip_str) {
if (*ip_str >= '0' && *ip_str <= '9')
++ip_str;
else
return 0;
}
return 1;
}
/* return 1 if IP string is valid, else return 0 */
int is_valid_ipv4(char *ip_str)
{
int i, num, dots = 0;
char *ptr;
int err=0;
if (ip_str == NULL)
err = 1;
// See following link for strtok()
// http://pubs.opengroup.org/onlinepubs/009695399/functions/strtok_r.html
ptr = strtok(ip_str, DELIM);
if (ptr == NULL)
err = 1;
while (ptr)
{
/* after parsing string, it must contain only digits */
if (!valid_digit(ptr))
err = 1;
num = atoi(ptr);
/* check for valid IP */
if (num >= 0 && num <= 255) {
/* parse remaining string */
ptr = strtok(NULL, DELIM);
if (ptr != NULL)
++dots;
} else
err = 1;
}
/* valid IP string must contain 3 dots */
if (dots != 3)
{
err = 1;
}
if(err == 0)
{
return 1;
}
else
{
return 0;
}
}
//////////////IPv6 Validator
#define MAX_HEX_NUMBER_COUNT 8
int ishexdigit(char ch)
{
if((ch>='0'&&ch<='9')||(ch>='a'&&ch<='f')||(ch>='A'&&ch<='F'))
return(1);
return(0);
}
int is_valid_ipv6(char *str)
{
int hdcount=0;
int hncount=0;
int err=0;
int packed=0;
if(*str==':')
{
str++;
if(*str!=':')
return(0);
else
{
packed=1;
hncount=1;
str++;
if(*str==0)
return(1);
}
}
if(ishexdigit(*str)==0)
{
return(0);
}
hdcount=1;
hncount=1;
str++;
while(err==0&&*str!=0)
{
if(*str==':')
{
str++;
if(*str==':')
{
if(packed==1)
err=1;
else
{
str++;
if(ishexdigit(*str)||*str==0&&hncount<MAX_HEX_NUMBER_COUNT)
{
packed=1;
hncount++;
if(ishexdigit(*str))
{
if(hncount==MAX_HEX_NUMBER_COUNT)
{
err=1;
} else
{
hdcount=1;
hncount++;
str++;
}
}
} else
{
err=1;
}
}
}
else
{
if(!ishexdigit(*str))
{
err=1;
} else
{
if(hncount==MAX_HEX_NUMBER_COUNT)
{
err=1;
} else
{
hdcount=1;
hncount++;
str++;
}
}
}
}
else
{
if(ishexdigit(*str))
{
if(hdcount==4)
err=1;
else
{
hdcount++;
str++;
}
} else
err=1;
}
}
if(hncount<MAX_HEX_NUMBER_COUNT&&packed==0)
err=1;
return(err==0);
}
///Still in work
uint64_t ip2int(char * ipconvertint)
{
uint64_t final_result =0;
char * iproc;
int ipat1=0;
int ipat2=0;
int ipat3=0;
int ipat4=0;
char ip[16];
strcpy(ip, ipconvertint);
iproc = strtok (ip,".");
for(int i=0; i<4;i++)
{
switch(i)
{
case 0:
{
ipat1 = atoi(iproc);
break;
}
case 1:
{
ipat2 = atoi(iproc);
break;
}
case 2:
{
ipat3 = atoi(iproc);
break;
}
case 3:
{
ipat4 = atoi(iproc);
break;
}
default:
{
printf("Somebody misplaced an int\n");
break;
}
}
iproc = strtok (NULL,".");
}
final_result = ((ipat1*pow(2,24))+(ipat2*pow(2,16))+(ipat3*pow(2,8))+ipat4*1);
return final_result;
}
char * int2ip(int inputintip)
{
uint32_t ipint = inputintip;
static char xxx_int2ip_result[16] = "\0";
bzero(xxx_int2ip_result,16);
uint32_t ipint0 = (ipint >> 8*3) % 256;
uint32_t ipint1 = (ipint >> 8*2) % 256;
uint32_t ipint2 = (ipint >> 8*1) % 256;
uint32_t ipint3 = (ipint >> 8*0) % 256;
sprintf(xxx_int2ip_result, "%d.%d.%d.%d", ipint0,ipint1,ipint2,ipint3);
return xxx_int2ip_result;
}
//I didn't feel another address_bytes_to_string was necesarry sry guys
int bytes_to_string(char * resultzx, uint8_t * catx,int xbsize)
{
bzero(resultzx,200);
uint8_t * bytes = NULL;
int size = 0;
size = xbsize;
load_protocols();
char hex[xbsize*2];
bzero(hex,xbsize*2);
strcat(hex,Var_To_Hex(size, catx));
//Positioning for memory jump:
int lastpos = 0;
char pid[3];
//Process Hex String
NAX:
//Stage 1 ID:
if(lastpos!=0)
{
lastpos+1;
}
pid[0] = hex[lastpos];
pid[1] = hex[lastpos+1];
pid[2] = '\0';
if(lastpos == 0)
{
load_protocols();
}
if(proto_with_deccode(Hex_To_Int(pid)))
{
//////////Stage 2: Address
struct protocol * PID;
PID = NULL;
PID = proto_with_deccode(Hex_To_Int(pid));
lastpos = lastpos+2;
char address[(PID->size/4)+1];
bzero(address,(PID->size/4)+1);
address[(PID->size/4)]='\0';
int x=0;
//printf("\nHEX TO DECODE: %s\n",hex);
for(int i = lastpos;i<(PID->size/4)+lastpos;i++)
{
address[x] = hex[i];
//printf("HEX[%d]=%c\n",i,hex[i]);
x++;
}
//////////Stage 3 Process it back to string
//printf("Protocol: %s\n", PID->name);
//printf("Address : %s\n", address);
lastpos= lastpos+(PID->size/4);
//printf("lastpos: %d",lastpos);
//////////Address:
//Keeping Valgrind happy
char name[30];
bzero(name,30);
strcpy(name, PID->name);
//
strcat(resultzx, "/");
strcat(resultzx, name);
strcat(resultzx, "/");
if(strcmp(name, "ip4")==0)
{
strcat(resultzx,int2ip(Hex_To_Int(address)));
}
else if(strcmp(name, "tcp")==0)
{
char a[5];
sprintf(a,"%lu",Hex_To_Int(address));
strcat(resultzx,a);
}
else if(strcmp(name, "udp")==0)
{
char a[5];
sprintf(a,"%lu",Hex_To_Int(address));
strcat(resultzx,a);
}
//printf("Address(hex):%s\n",address);
//printf("TESTING: %s\n",resultzx);
/////////////Done processing this, move to next if there is more.
if(lastpos<size*2)
{
goto NAX;
}
}
strcat(resultzx, "/");
unload_protocols();
}
//
char * address_string_to_bytes(struct protocol * xx, char * abc,size_t getsznow)
{
static char astb__stringy[200] = "\0";
bzero(astb__stringy,200);
int code = 0;
code = xx->deccode;
switch(code)
{
case 4://IPv4
{
char testip[16] = "\0";
bzero(testip,16);
strcpy(testip,abc);
if(is_valid_ipv4(testip)==1)
{
uint64_t iip = ip2int(abc);
strcpy(astb__stringy,Int_To_Hex(iip));
xx = NULL;
return astb__stringy;
}
else
{
return "ERR";
}
break;
}
case 41://IPv6 Must be done
{
return "ERR";
break;
}
case 6: //Tcp
{
if(atoi(abc)<65536&&atoi(abc)>0)
{
static char himm_woot[4] = "\0";
bzero(himm_woot, 4);
strcpy(himm_woot, Int_To_Hex(atoi(abc)));
if(himm_woot[2] == '\0')
{//manual switch
char swap0='0';
char swap1='0';
char swap2=himm_woot[0];
char swap3=himm_woot[1];
himm_woot[0] = swap0;
himm_woot[1] = swap1;
himm_woot[2] = swap2;
himm_woot[3] = swap3;
}
else if(himm_woot[3] == '\0')
{
char swap0='0';
char swap1=himm_woot[0];
char swap2=himm_woot[1];
char swap3=himm_woot[2];
himm_woot[0] = swap0;
himm_woot[1] = swap1;
himm_woot[2] = swap2;
himm_woot[3] = swap3;
}
return himm_woot;
}
else
{
return "ERR";
}
break;
}
case 17: //Udp
{
if(atoi(abc)<65536&&atoi(abc)>0)
{
static char himm_woot2[4] = "\0";
bzero(himm_woot2, 4);
strcpy(himm_woot2, Int_To_Hex(atoi(abc)));
if(himm_woot2[2] == '\0')
{//Manual Switch2be
char swap0='0';
char swap1='0';
char swap2=himm_woot2[0];
char swap3=himm_woot2[1];
himm_woot2[0] = swap0;
himm_woot2[1] = swap1;
himm_woot2[2] = swap2;
himm_woot2[3] = swap3;
}
else if(himm_woot2[3] == '\0')
{//Manual switch
char swap0='0';
char swap1=himm_woot2[0];
char swap2=himm_woot2[1];
char swap3=himm_woot2[2];
himm_woot2[0] = swap0;
himm_woot2[1] = swap1;
himm_woot2[2] = swap2;
himm_woot2[3] = swap3;
}
return himm_woot2;
}
else
{
return "ERR";
}
break;
}
case 33://dccp
{
return "ERR";
break;
}
case 132://sctp
{
return "ERR";
break;
}
case 301://udt
{
return "ERR";
break;
}
case 302://utp
{
return "ERR";
break;
}
case 42://IPFS - !!!
{
break;
}
case 480://http
{
return "ERR";
break;
}
case 443://https
{
return "ERR";
break;
}
case 477://ws
{
return "ERR";
break;
}
case 444://onion
{
return "ERR";
break;
}
case 275://libp2p-webrtc-star
{
return "ERR";
break;
}
default:
{
printf("NO SUCH PROTOCOL!\n");
return "ERR";
break;
}
}
}
int string_to_bytes(uint8_t * finalbytes,int * realbbsize,char * strx, size_t strsize)
{
static char xxx[200] = "\0";
bzero(xxx,200);
int sigmalf = 0;
char * totpch;
char totalwordstest[strsize];
bzero(totalwordstest,strsize);
strcat(totalwordstest, strx);
int totalwords = 0;
totpch = strtok(totalwordstest, "/");
while(totpch != NULL)
{
totpch = strtok (NULL, "/");
totalwords++;
}
int processedwords = 0;
char processedsofar[100];
bzero(processedsofar,100);
char str[strsize]; //This string will be bad later.
bzero(str,strsize);
nextproc:
strcpy(str,strx);
if(str[0] == '/')
{
char * pch;
pch = strtok (str,"/");
load_protocols();
for(int ax=0;ax<processedwords;ax++)
{
pch = strtok (NULL, "/");
}
while(pch != NULL)
{
if(proto_with_name(pch))
{
strcat(processedsofar, "/");
strcat(processedsofar, pch);
struct protocol * protx;
//printf("PCH-P:%s\n",pch);
protx = proto_with_name(pch);
char cut[3]="\0";
bzero(cut,3);
strcat(cut,Int_To_Hex(protx->deccode));
cut[2] = '\0';
char finipbit[3] = "\0";
bzero(finipbit,3);
finipbit[0] = cut[0];
finipbit[1] = cut[1];
finipbit[2] = '\0';
//Address
pch = strtok (NULL, "/"); // Move to supposed address
strcat(processedsofar, "/");
strcat(processedsofar, pch);
//printf("PCH-A:%s\n",pch);
char addr[60] = "\0";
bzero(addr,60);
strcat(addr, pch);
//If both are ok:
strcat(xxx,finipbit);
if(address_string_to_bytes(protx, addr,sizeof(addr)))
{
if(address_string_to_bytes(protx, addr,sizeof(addr)) == "ERR")
{
sigmalf = 1;
}
else
{
strcat(xxx,address_string_to_bytes(protx, addr,sizeof(addr)));
}
}
else
{
sigmalf = 1;
}
pch = strtok (NULL, "/"); // Next step.
processedwords++;
processedwords++;
}
else
{
//This only gets triggered if the string has a wrong format
//Or unknown protocol!
printf("ERROR: MALFORMED STRING\n");
return 0;
}
}
if(processedwords != totalwords)
{
goto nextproc;
}
unload_protocols();
if(sigmalf != 1)
{
//printf("S2B_RESULT: %s\n", xxx);
//static uint8_t finalbytes[100] = {0};
bzero(finalbytes,100);
//printf("XXX: %s\n",xxx);
memcpy(finalbytes, Hex_To_Var(xxx), 100);
realbbsize[0] = 0;
for(int i=0;i<100;i++)
{
if(finalbytes[i])
{
realbbsize[0]++;
}
}
//printf("FB2XXX: %s\nWith size: %u\n",Var_To_Hex(finalbytes), realbbsize[0]);
//realbsize = realsize;
//printf("REALbBSZIE: %d", realbbsize[0]);
return 1;//success
}
else
{
printf("ERROR, MALFORMED STRING!\n");
return 0;
}
}
else
{
printf("ERROR, Multiaddr needs to start with '/'\n");
return 0;
}
}
#endif
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