#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

/*

Contributed by Alex Petrov aka SysMan at sysman.net
Updated by Alejandro Reyero - TodoJuegos.com

Part of NOMP project
Simple lightweight & fast - a more efficient block notify script in pure C.

(may also work as coin switch)

Platforms : Linux,BSD,Solaris (mostly OS independent)

Build with:
    gcc blocknotify.c -o blocknotify


Usage in daemon coin.conf
    blocknotify="/bin/blocknotify 127.0.0.1:8117 mySuperSecurePassword dogecoin %s"

*NOTE* If you use "localhost" as hostname you may get a "13" error (socket / connect / send may consider "localhost" as a broadcast address)

// {"password":"notepas","coin":"Xcoin","hash":"d2191a8b644c9cd903439edf1d89ee060e196b3e116e0d48a3f11e5e3987a03b"}
// simplest connect + send json string to server

# $Id: blocknotify.c,v 0.1 2014/04/07 22:38:09 sysman Exp $
*/


int main(int argc, char **argv)
{
   int sockfd,n;
   struct sockaddr_in servaddr,cliaddr;
   char sendline[1000];
   char recvline[1000];
   char host[200];
   char *p,*arg,*errptr;
   int port;

   if (argc < 4)
   {
	// print help
      printf("NOMP pool block notify\n usage: <host:port> <password> <coin> <block>\n");
      exit(1);
   }

   strncpy(host,argv[1],(sizeof(host)-1));
   p=host;

   if ( (arg=strchr(p,':')) ) 
   { 
   	*arg='\0';

 	errno=0; // reset errno
 	port=strtol(++arg,&errptr,10);

	if ( (errno != 0) || (errptr == arg) ) { fprintf(stderr, "port number fail [%s]\n",errptr); }
	// if(strlen(arg) > (errptr-arg) ) also fail, but we ignore it for now
	// printf("host %s:%d\n",host,port);
   }

   // printf("pass: %s coin: %s  block:[%s]\n",argv[2],argv[3],argv[4]);
   snprintf(sendline,sizeof(sendline)-1,
 	"{\"password\":\"%s\",\"coin\":\"%s\",\"hash\":\"%s\"}\n",
	argv[2],	argv[3],	argv[4]);

   // printf("sendline:[%s]",sendline);

   sockfd=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
   bzero(&servaddr,sizeof(servaddr));
   servaddr.sin_family = AF_INET;
   servaddr.sin_addr.s_addr=inet_addr(host);
   servaddr.sin_port=htons(port);
   connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr));

   int result = send(sockfd,sendline,strlen(sendline),0);
   close(sockfd);

   if(result == -1) {
        printf("Error sending: %i\n",errno);
        exit(-1);
   }
   exit(0);
}