statd.c

非常高效的扫描器

#include <stdio.h>
#include <netdb.h>
#include <stdlib.h>
#include <signal.h>
#include <rpc/rpc.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>

#define ERROR -1

int woopy(int s);
int statd(char *host);
unsigned long int res(char *p);



int woopy(int s) // EINTR @*&()!~@*$)(
{
  return 0;
}

int statd(char *host)
{
  struct sockaddr_in server_addr;
  struct pmaplist *head = NULL;
  int sockett = RPC_ANYSOCK;
  struct timeval minutetimeout;
  register CLIENT *client;
  struct rpcent *rpc;

  server_addr.sin_addr.s_addr=inet_addr(host);
  server_addr.sin_family=AF_INET;
  server_addr.sin_port = htons(PMAPPORT);
  minutetimeout.tv_sec = 15;
  minutetimeout.tv_usec = 0;

  /* cause clnttcp_create uses connect() */
  signal(SIGALRM,woopy);
  alarm(15);

  if ((client = clnttcp_create(&server_addr, PMAPPROG,
        PMAPVERS, &sockett, 50, 500)) == NULL) {
    alarm(0);
    signal(SIGALRM,SIG_DFL);
    return 0;
  }
  alarm(0);
  signal(SIGALRM,SIG_DFL);

  if (clnt_call(client, PMAPPROC_DUMP, (xdrproc_t) xdr_void, NULL,
        (xdrproc_t) xdr_pmaplist, &head, minutetimeout) != RPC_SUCCESS)
    return 0;
  if (head != NULL)
    for (; head != NULL; head = head->pml_next)
      if((rpc = getrpcbynumber(head->pml_map.pm_prog)))
        if(strcmp(rpc->r_name,"rstatd") == 0)
          return 1;

  return 0;
}

unsigned long int res(char *p)
{
   struct hostent *h;

   h=gethostbyname(p);
   if(h!=NULL)
	{
     return h->h_addr;
	}
}