I want to make this program run on solaris machine .... what changes can i do .....

Posted on 2004-08-08
Last Modified: 2008-01-09
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 *);

  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");
      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]);

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

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)
  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));


To compile on soalris :

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

To Run :


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..


Question by:amankhan
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1 Comment
LVL 10

Accepted Solution

Nukfror earned 500 total points
ID: 11759268
Well, I'm no programmer but setsockopt has a list of supported socket options /usr/include/sys/socket.h on Solaris and the list below doesn't appear to have your LOCAL_CREDS defined anywhere.  From my looking on the net LOCAL_CREDS seems to be a *BSD derivative and not something Solaris has.  More comments after this socket options below.

 * Option flags per-socket.
#define SO_DEBUG        0x0001          /* turn on debugging info recording */
#define SO_ACCEPTCONN   0x0002          /* socket has had listen() */
#define SO_REUSEADDR    0x0004          /* allow local address reuse */
#define SO_KEEPALIVE    0x0008          /* keep connections alive */
#define SO_DONTROUTE    0x0010          /* just use interface addresses */
#define SO_BROADCAST    0x0020          /* permit sending of broadcast msgs */
#define SO_USELOOPBACK  0x0040          /* bypass hardware when possible */
#define SO_LINGER       0x0080          /* linger on close if data present */
#define SO_OOBINLINE    0x0100          /* leave received OOB data in line */
#define SO_DGRAM_ERRIND 0x0200          /* Application wants delayed error */

 * N.B.: The following definition is present only for compatibility
 * with release 3.0.  It will disappear in later releases.
#define SO_DONTLINGER   (~SO_LINGER)    /* ~SO_LINGER */

 * Additional options, not kept in so_options.
#define SO_SNDBUF       0x1001          /* send buffer size */
#define SO_RCVBUF       0x1002          /* receive buffer size */
#define SO_SNDLOWAT     0x1003          /* send low-water mark */
#define SO_RCVLOWAT     0x1004          /* receive low-water mark */
#define SO_SNDTIMEO     0x1005          /* send timeout */
#define SO_RCVTIMEO     0x1006          /* receive timeout */
#define SO_ERROR        0x1007          /* get error status and clear */
#define SO_TYPE         0x1008          /* get socket type */
#define SO_PROTOTYPE    0x1009          /* get/set protocol type */

As to the errors saying:

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'

If you look in /usr/include/sys/socket.h on a Solaris box, you'll see this within the msghdr structure:

if defined(_XPG4_2) || defined(_KERNEL)
        void            *msg_control;           /* ancillary data */
        socklen_t       msg_controllen;         /* ancillary data buffer len */
        int             msg_flags;              /* flags on received message */
        caddr_t         msg_accrights;  /* access rights sent/received */
        int             msg_accrightslen;
#endif  /* defined(_XPG4_2) || defined(_KERNEL) */

So you will only get the msg_control, msg_controllen, and msg_flags structure members assuming you have _XPG4_2 or _KERNEL_ defined.  From the errors you are getting, it appears you haven't defined either of these.

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