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I want to make this program run on solaris machine .....

Posted on 2004-08-08
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Last Modified: 2013-12-05
Hi guys,

 The following program is for getting credentials......

 I have some problems facing when run on solaris machine ......

 
Program is following :---->


#include   <stdio.h>
#include   <stdlib.h>
#include   <sys/socket.h>
#include   <errno.h>
#include   <sys/types.h>
#include   <sys/uio.h>
#include   <signal.h>
#include   <time.h>
#include   <sys/types.h>
#include   <stdlib.h>
#include   <pthread.h>
#include   <sys/param.h>
#include   <sys/cred.h>


ssize_t recv_cred(int, void *, size_t, struct cred *);

main()
{
  int             fd[2], on, n;
  char            buf[100];
  struct cred    cred;
 
  if (socketpair(AF_UNIX, SOCK_STREAM, 0, fd) < 0)
    perror("Socketpair Error");
 
  /* must set the socket option on the *receiving* socket */
  on = 1;
  setsockopt(fd[1], 0, LOCAL_CREDS, &on, sizeof(on));
 
  write(fd[0], "hello, world\n", 13);
 
  if ( (n = recv_cred(fd[1], buf, sizeof(buf), &cred)) < 0)
    perror("Recv_Cred Error");
 
  else if (n == 0)
    perror("Recv_Cred, Unexpected EOF");
 
  buf[n] = 0;                     /* null terminate */
  printf("data: %s", buf);
 
  if (cred.cr_ngroups == 0)
    printf("[No CREDENTIALS Returned]\n");
 
  else
    {
      printf(" Real User ID = %d\n", cred.cr_ruid);
      printf(" Real Group ID = %d\n", cred.cr_rgid);
      //      printf(" Login Name = %-*s\n", MAXLOGNAME, cred.cr_login);
      printf(" Effective User ID = %d\n", cred.cr_uid);
      printf(" Effective Group ID = %d\n", cred.cr_gid);
      printf(" %d Supplementary Groups:", cred.cr_ngroups - 1);
     
      for (n = 1; n < cred.cr_ngroups; n++)   /* [0] is the egid */
      printf(" %d", cred.cr_groups[n]);
     
      printf("\n");
    }
 
  exit(0);
 
}


#define CONTROL_LEN     (sizeof(struct cmsghdr) + sizeof(struct cred))


ssize_t
recv_cred(int fd, void *ptr, size_t nbytes, struct cred *credptr)
{
  struct msghdr   msg;
  struct iovec    iov[1];
  char            control[CONTROL_LEN + 20];
  int             n;
 
  msg.msg_name = NULL;
  msg.msg_namelen = 0;
 
  iov[0].iov_base = ptr;
  iov[0].iov_len = nbytes;
 
  msg.msg_iov = iov;
  msg.msg_iovlen = 1;

  msg.msg_control = control;
  msg.msg_controllen = sizeof(control);
  msg.msg_flags = 0;

  if ( (n = recvmsg(fd, &msg, 0)) < 0)
    return(n);
 
  credptr->cr_ngroups = 0;       /* indicates no credentials returned */
 
  if (credptr && msg.msg_controllen > 0)
    {
      struct cmsghdr  *cmptr = (struct cmsghdr *) control;
     
      if (cmptr->cmsg_len != sizeof(struct cmsghdr) + sizeof(struct cred))
      err_quit("control length = %d", cmptr->cmsg_len);
     
      if (cmptr->cmsg_level != SOL_SOCKET)
      err_quit("control level != SOL_SOCKET");
     
      if (cmptr->cmsg_type != SCM_CREDS)
      err_quit("control type != SCM_CREDS");
     
      memcpy(credptr, CMSG_DATA(cmptr), sizeof(struct cred));
    }

  return(n);
}


To compile on soalris :

 cc -o tfcred02 tfcred02.c -lsocket -lnsl -lrt

To Run :

  ./tfcred02


Am getting some errors:

They are following :---->

[ab1221@eagles ~/AdvNetProg/Assign3]$ cc -o tfcred02 tfcred02.c -lsocket -lnsl -lrt

tfcred02.c: In function `main':
tfcred02.c:30: error: `LOCAL_CREDS' undeclared (first use in this function)
tfcred02.c:30: error: (Each undeclared identifier is reported only once
tfcred02.c:30: error: for each function it appears in.)
tfcred02.c: In function `recv_cred':
tfcred02.c:86: error: structure has no member named `msg_control'
tfcred02.c:87: error: structure has no member named `msg_controllen'
tfcred02.c:88: error: structure has no member named `msg_flags'
tfcred02.c:95: error: structure has no member named `msg_controllen'
tfcred02.c:105: error: `SCM_CREDS' undeclared (first use in this function)
tfcred02.c:108: warning: passing arg 2 of `memcpy' makes pointer from integer without a cast

[ab1221@eagles ~/AdvNetProg/Assign3]$


Pls help me in this program..

bye
aman

0
Comment
Question by:amankhan
2 Comments
 
LVL 38

Accepted Solution

by:
yuzh earned 500 total points
ID: 11749869
Please have a look at the following docs:
   "Secure interprocess communication"
     http://cr.yp.to/docs/secureipc.html

   "Secure UNIX Programming FAQ":
   http://www.securitymap.net/sdm/docs/faq/secure-faq.html
   http://www.uni-giessen.de/faq/archiv/unix-faq.programmer.secure-programming/msg00000.html
0
 
LVL 1

Expert Comment

by:eric_j_kropf
ID: 11754948
In the :

setsockopt(fd[1], 0, LOCAL_CREDS, &on, sizeof(on));

LOCAL_CREDS is not defined in the code.

int setsockopt( SOCKET s,  int level,  int optname,  const char* optval,  int optlen);

Hope this helps.
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