Authen-Smb

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smbval/rfcnb-io.c  view on Meta::CPAN

   We read the first 4 bytes, that tells us the length, then read the
   rest. We should implement a timeout, but we don't just yet 

*/


int RFCNB_Get_Pkt(struct RFCNB_Con *con, struct RFCNB_Pkt *pkt, int len)

{ int read_len, pkt_len;
  char hdr[RFCNB_Pkt_Hdr_Len];      /* Local space for the header */
  struct RFCNB_Pkt *pkt_frag;
  int more, this_time, offset, frag_len, this_len;
  BOOL seen_keep_alive = TRUE;

  /* Read that header straight into the buffer */

  if (len < RFCNB_Pkt_Hdr_Len) { /* What a bozo */

#ifdef RFCNB_DEBUG
    fprintf(stderr, "Trying to read less than a packet:");
    perror("");
#endif

smbval/rfcnb-io.c  view on Meta::CPAN

#ifdef RFCNB_DEBUG
  fprintf(stderr, "Reading Pkt: Length = %i\n", pkt_len);
#endif  

  /* Now copy in the hdr */

  memcpy(pkt -> data, hdr, sizeof(hdr));

  /* Get the rest of the packet ... first figure out how big our buf is? */
  /* And make sure that we handle the fragments properly ... Sure should */
  /* use an iovec ...                                                    */

  if (len < pkt_len)            /* Only get as much as we have space for */
    more = len - RFCNB_Pkt_Hdr_Len;
  else
    more = pkt_len;

  this_time = 0;

  /* We read for each fragment ... */

  if (pkt -> len == read_len){     /* If this frag was exact size */
    pkt_frag = pkt -> next;        /* Stick next lot in next frag */
    offset = 0;                    /* then we start at 0 in next  */
  }
  else {
    pkt_frag = pkt;                /* Otherwise use rest of this frag */
    offset = RFCNB_Pkt_Hdr_Len;    /* Otherwise skip the header       */
  }

  frag_len = pkt_frag -> len;

  if (more <= frag_len)     /* If len left to get less than frag space */
    this_len = more;        /* Get the rest ...                        */
  else
    this_len = frag_len - offset;

  while (more > 0) {

    if ((this_time = read(con -> fd, (pkt_frag -> data) + offset, this_len)) <= 0) { /* Problems */

      if (errno == EINTR) {

	RFCNB_errno = RFCNB_Timeout;

      }
      else {
	if (this_time < 0)
	  RFCNB_errno = RFCNBE_BadRead;
	else
	  RFCNB_errno = RFCNBE_ConGone;
      }

      RFCNB_saved_errno = errno;
      return(RFCNBE_Bad);

    }

#ifdef RFCNB_DEBUG
    fprintf(stderr, "Frag_Len = %i, this_time = %i, this_len = %i, more = %i\n", frag_len,
                    this_time, this_len, more);
#endif

    read_len = read_len + this_time;  /* How much have we read ... */

    /* Now set up the next part */

    if (pkt_frag -> next == NULL) break;       /* That's it here */

    pkt_frag = pkt_frag -> next;
    this_len = pkt_frag -> len;
    offset = 0;

    more = more - this_time;

  }

#ifdef RFCNB_DEBUG
  fprintf(stderr,"Pkt Len = %i, read_len = %i\n", pkt_len, read_len);
  RFCNB_Print_Pkt(stderr, "rcvd", pkt, read_len + sizeof(hdr));
#endif

smbval/rfcnb-util.c  view on Meta::CPAN

  }
  return 0;
}

/* Print an RFCNB packet */

void RFCNB_Print_Pkt(FILE *fd, char *dirn, struct RFCNB_Pkt *pkt, int len)

{ char lname[17];

  /* We assume that the first fragment is the RFCNB Header  */
  /* We should loop through the fragments printing them out */

  fprintf(fd, "RFCNB Pkt %s:", dirn);

  switch (RFCNB_Pkt_Type(pkt -> data)) {

  case RFCNB_SESSION_MESSAGE: 

    fprintf(fd, "SESSION MESSAGE: Length = %i\n", RFCNB_Pkt_Len(pkt -> data));
    RFCNB_Print_Hex(fd, pkt, RFCNB_Pkt_Hdr_Len, 
#ifdef RFCNB_PRINT_DATA

smbval/smblib-priv.h  view on Meta::CPAN

typedef unsigned short WORD;
typedef unsigned short UWORD;
typedef unsigned int ULONG;
typedef unsigned char BYTE;
typedef unsigned char UCHAR;

/* Some macros to allow access to actual packet data so that we */
/* can change the underlying representation of packets.         */
/*                                                              */
/* The current formats vying for attention are a fragment       */
/* approach where the SMB header is a fragment linked to the    */
/* data portion with the transport protocol (rfcnb or whatever) */
/* being linked on the front.                                   */
/*                                                              */
/* The other approach is where the whole packet is one array    */
/* of bytes with space allowed on the front for the packet      */
/* headers.                                                     */

#define SMB_Hdr(p) (char *)(p -> data)

/* SMB Hdr def for File Sharing Protocol? From MS and Intel,    */