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author | Mystery Man <unknown@mandriva.org> | 2004-02-20 00:03:26 +0000 |
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committer | Mystery Man <unknown@mandriva.org> | 2004-02-20 00:03:26 +0000 |
commit | 959a1722faec6b30510c788c49dcb4b7cb96d1e0 (patch) | |
tree | 8d25ea2b09098078292e7dcda489471a30b4e81a /mdk-stage1/dietlibc/librpc/xdr_rec.c | |
parent | 0413d7133026a6cddf226027ebdfee6fa68890f7 (diff) | |
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This commit was manufactured by cvs2svn to create tag 'V10_0_21mdk'.V10_0_21mdk
Diffstat (limited to 'mdk-stage1/dietlibc/librpc/xdr_rec.c')
-rw-r--r-- | mdk-stage1/dietlibc/librpc/xdr_rec.c | 572 |
1 files changed, 0 insertions, 572 deletions
diff --git a/mdk-stage1/dietlibc/librpc/xdr_rec.c b/mdk-stage1/dietlibc/librpc/xdr_rec.c deleted file mode 100644 index ab0b6fd8d..000000000 --- a/mdk-stage1/dietlibc/librpc/xdr_rec.c +++ /dev/null @@ -1,572 +0,0 @@ -/* @(#)xdr_rec.c 2.2 88/08/01 4.0 RPCSRC */ -/* - * Sun RPC is a product of Sun Microsystems, Inc. and is provided for - * unrestricted use provided that this legend is included on all tape - * media and as a part of the software program in whole or part. Users - * may copy or modify Sun RPC without charge, but are not authorized - * to license or distribute it to anyone else except as part of a product or - * program developed by the user. - * - * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE - * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR - * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. - * - * Sun RPC is provided with no support and without any obligation on the - * part of Sun Microsystems, Inc. to assist in its use, correction, - * modification or enhancement. - * - * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE - * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC - * OR ANY PART THEREOF. - * - * In no event will Sun Microsystems, Inc. be liable for any lost revenue - * or profits or other special, indirect and consequential damages, even if - * Sun has been advised of the possibility of such damages. - * - * Sun Microsystems, Inc. - * 2550 Garcia Avenue - * Mountain View, California 94043 - */ -#if !defined(lint) && defined(SCCSIDS) -static char sccsid[] = "@(#)xdr_rec.c 1.21 87/08/11 Copyr 1984 Sun Micro"; -#endif - -/* - * xdr_rec.c, Implements TCP/IP based XDR streams with a "record marking" - * layer above tcp (for rpc's use). - * - * Copyright (C) 1984, Sun Microsystems, Inc. - * - * These routines interface XDRSTREAMS to a tcp/ip connection. - * There is a record marking layer between the xdr stream - * and the tcp transport level. A record is composed on one or more - * record fragments. A record fragment is a thirty-two bit header followed - * by n bytes of data, where n is contained in the header. The header - * is represented as a htonl(unsigned long). Thegh order bit encodes - * whether or not the fragment is the last fragment of the record - * (1 => fragment is last, 0 => more fragments to follow. - * The other 31 bits encode the byte length of the fragment. - */ - -#include <stdio.h> -#include <rpc/types.h> -#include <rpc/xdr.h> -#include <netinet/in.h> -#include <string.h> -#include <unistd.h> - -static unsigned int fix_buf_size (unsigned int); - -static bool_t xdrrec_getlong (XDR *, long *); -static bool_t xdrrec_putlong (XDR *, const long *); -static bool_t xdrrec_getbytes (XDR *, char *, unsigned int); -static bool_t xdrrec_putbytes (XDR *, const char *, unsigned int); -static unsigned int xdrrec_getpos (const XDR *); -static bool_t xdrrec_setpos (XDR *, unsigned int); -static int32_t *xdrrec_inline (XDR *, unsigned int); -static void xdrrec_destroy (XDR *); - -static struct xdr_ops xdrrec_ops = { - xdrrec_getlong, - xdrrec_putlong, - xdrrec_getbytes, - xdrrec_putbytes, - xdrrec_getpos, - xdrrec_setpos, - xdrrec_inline, - xdrrec_destroy -}; - - -/* - * A record is composed of one or more record fragments. - * A record fragment is a two-byte header followed by zero to - * 2**32-1 bytes. The header is treated as a long unsigned and is - * encode/decoded to the network via htonl/ntohl. The low order 31 bits - * are a byte count of the fragment. The highest order bit is a boolean: - * 1 => this fragment is the last fragment of the record, - * 0 => this fragment is followed by more fragment(s). - * - * The fragment/record machinery is not general; it is constructed to - * meet the needs of xdr and rpc based on tcp. - */ - -#define LAST_FRAG ((unsigned long)(1 << 31)) - -typedef struct rec_strm { - char* tcp_handle; - char* the_buffer; - /* - * out-goung bits - */ - int (*writeit) (char *, char *, int); - char* out_base; /* output buffer (points to frag header) */ - char* out_finger; /* next output position */ - char* out_boundry; /* data cannot up to this address */ - uint32_t *frag_header; /* beginning of curren fragment */ - bool_t frag_sent; /* true if buffer sent in middle of record */ - /* - * in-coming bits - */ - int (*readit) (char *, char *, int); - unsigned long in_size; /* fixed size of the input buffer */ - char* in_base; - char* in_finger; /* location of next byte to be had */ - char* in_boundry; /* can read up to this location */ - long fbtbc; /* fragment bytes to be consumed */ - bool_t last_frag; - unsigned int sendsize; - unsigned int recvsize; -} RECSTREAM; - - -/* - * Create an xdr handle for xdrrec - * xdrrec_create fills in xdrs. Sendsize and recvsize are - * send and recv buffer sizes (0 => use default). - * tcp_handle is an opaque handle that is passed as the first parameter to - * the procedures readit and writeit. Readit and writeit are read and - * write respectively. They are like the system - * calls expect that they take an opaque handle rather than an fd. - */ -void -xdrrec_create (XDR *xdrs, unsigned int sendsize, - unsigned int recvsize, char *tcp_handle, - int (*readit) (char *, char *, int), - int (*writeit) (char *, char *, int)) -{ - register RECSTREAM *rstrm = (RECSTREAM *) mem_alloc(sizeof(RECSTREAM)); - - if (rstrm == NULL) { - (void) fprintf(stderr, "xdrrec_create: out of memory\n"); - /* - * This is bad. Should rework xdrrec_create to - * return a handle, and in this case return NULL - */ - return; - } - /* - * adjust sizes and allocate buffer quad byte aligned - */ - rstrm->sendsize = sendsize = fix_buf_size(sendsize); - rstrm->recvsize = recvsize = fix_buf_size(recvsize); - rstrm->the_buffer = - mem_alloc(sendsize + recvsize + BYTES_PER_XDR_UNIT); - if (rstrm->the_buffer == NULL) { - (void) fprintf(stderr, "xdrrec_create: out of memory\n"); - return; - } - for (rstrm->out_base = rstrm->the_buffer; - (unsigned long) rstrm->out_base % BYTES_PER_XDR_UNIT != 0; - rstrm->out_base++); - rstrm->in_base = rstrm->out_base + sendsize; - /* - * now the rest ... - */ - xdrs->x_ops = &xdrrec_ops; - xdrs->x_private = (char*) rstrm; - rstrm->tcp_handle = tcp_handle; - rstrm->readit = readit; - rstrm->writeit = writeit; - rstrm->out_finger = rstrm->out_boundry = rstrm->out_base; - rstrm->frag_header = (uint32_t *) rstrm->out_base; - rstrm->out_finger += 4; - rstrm->out_boundry += sendsize; - rstrm->frag_sent = FALSE; - rstrm->in_size = recvsize; - rstrm->in_boundry = rstrm->in_base; - rstrm->in_finger = (rstrm->in_boundry += recvsize); - rstrm->fbtbc = 0; - rstrm->last_frag = TRUE; -} - - -/* - * The reoutines defined below are the xdr ops which will go into the - * xdr handle filled in by xdrrec_create. - */ - -static bool_t -xdrrec_getlong (XDR *xdrs, long *lp) -{ - register RECSTREAM *rstrm = (RECSTREAM *) (xdrs->x_private); - register int32_t *buflp = (int32_t *) (rstrm->in_finger); - int32_t mylong; - - /* first try the inline, fast case */ - if ((rstrm->fbtbc >= BYTES_PER_XDR_UNIT) && - ((rstrm->in_boundry - (char *) buflp) >= BYTES_PER_XDR_UNIT)) { - *lp = (int32_t) ntohl(*buflp); - rstrm->fbtbc -= BYTES_PER_XDR_UNIT; - rstrm->in_finger += BYTES_PER_XDR_UNIT; - } else { - if (!xdrrec_getbytes(xdrs, (char*) & mylong, BYTES_PER_XDR_UNIT)) - return (FALSE); - - *lp = (int32_t) ntohl(mylong); - } - return (TRUE); -} - -/* - * Internal useful routines - */ -static bool_t flush_out(RECSTREAM* rstrm, bool_t eor) -{ - register unsigned long eormask = (eor == TRUE) ? LAST_FRAG : 0; - register unsigned long len = (rstrm->out_finger - - (char *) rstrm->frag_header - - BYTES_PER_XDR_UNIT); - - *(rstrm->frag_header) = htonl(len | eormask); - len = rstrm->out_finger - rstrm->out_base; - if ((*(rstrm->writeit)) (rstrm->tcp_handle, rstrm->out_base, (int) len) - != (int) len) - return (FALSE); - rstrm->frag_header = (uint32_t *) rstrm->out_base; - rstrm->out_finger = (char*) rstrm->out_base + BYTES_PER_XDR_UNIT; - return (TRUE); -} - -static bool_t -/* knows nothing about records! Only about input buffers */ -fill_input_buf(rstrm) -register RECSTREAM *rstrm; -{ - register char* where; - unsigned int i; - register int len; - - where = rstrm->in_base; - i = (unsigned long) rstrm->in_boundry % BYTES_PER_XDR_UNIT; - where += i; - len = rstrm->in_size - i; - if ((len = (*(rstrm->readit)) (rstrm->tcp_handle, where, len)) == -1) - return (FALSE); - rstrm->in_finger = where; - where += len; - rstrm->in_boundry = where; - return (TRUE); -} - -static bool_t -/* knows nothing about records! Only about input buffers */ -get_input_bytes(rstrm, addr, len) -register RECSTREAM *rstrm; -register char* addr; -register int len; -{ - register int current; - - while (len > 0) { - current = rstrm->in_boundry - rstrm->in_finger; - if (current == 0) { - if (!fill_input_buf(rstrm)) - return (FALSE); - continue; - } - current = (len < current) ? len : current; - memmove(addr, rstrm->in_finger, current); - rstrm->in_finger += current; - addr += current; - len -= current; - } - return (TRUE); -} - -static bool_t -/* next two bytes of the input stream are treated as a header */ -set_input_fragment(rstrm) -register RECSTREAM *rstrm; -{ - uint32_t header; - - if (!get_input_bytes(rstrm, (char*) & header, sizeof(header))) - return (FALSE); - header = ntohl(header); - rstrm->last_frag = ((header & LAST_FRAG) == 0) ? FALSE : TRUE; - /* - * Sanity check. Try not to accept wildly incorrect fragment - * sizes. Unfortunately, only a size of zero can be identified as - * 'wildely incorrect', and this only, if it is not the last - * fragment of a message. Ridiculously large fragment sizes may look - * wrong, but we don't have any way to be certain that they aren't - * what the client actually intended to send us. Many existing RPC - * implementations may sent a fragment of size zero as the last - * fragment of a message. - */ - if (header == 0) - return FALSE; - rstrm->fbtbc = header & (~LAST_FRAG); - return (TRUE); -} - -static bool_t -/* consumes input bytes; knows nothing about records! */ -skip_input_bytes(rstrm, cnt) -register RECSTREAM *rstrm; -long cnt; -{ - register int current; - - while (cnt > 0) { - current = rstrm->in_boundry - rstrm->in_finger; - if (current == 0) { - if (!fill_input_buf(rstrm)) - return (FALSE); - continue; - } - current = (cnt < current) ? cnt : current; - rstrm->in_finger += current; - cnt -= current; - } - return (TRUE); -} - -static unsigned int -fix_buf_size (unsigned int s) -{ - - if (s < 100) - s = 4000; - return (RNDUP(s)); -} - -static bool_t -xdrrec_putlong (XDR *xdrs, const long *lp) -{ - register RECSTREAM *rstrm = (RECSTREAM *) (xdrs->x_private); - register int32_t *dest_lp = (int32_t *) rstrm->out_finger; - - if ((rstrm->out_finger += BYTES_PER_XDR_UNIT) > rstrm->out_boundry) { - /* - * this case should almost never happen so the code is - * inefficient - */ - rstrm->out_finger -= BYTES_PER_XDR_UNIT; - - rstrm->frag_sent = TRUE; - if (!flush_out(rstrm, FALSE)) - return (FALSE); - dest_lp = ((int32_t *) (rstrm->out_finger)); - rstrm->out_finger += BYTES_PER_XDR_UNIT; - } - *dest_lp = htonl(*lp); - return (TRUE); -} - -static bool_t /* must manage buffers, fragments, and records */ -xdrrec_getbytes (XDR *xdrs, char *addr, unsigned int len) -{ - register RECSTREAM *rstrm = (RECSTREAM *) (xdrs->x_private); - register unsigned int current; - - while (len > 0) { - current = rstrm->fbtbc; - if (current == 0) { - if (rstrm->last_frag) - return (FALSE); - if (!set_input_fragment(rstrm)) - return (FALSE); - continue; - } - current = (len < current) ? len : current; - if (!get_input_bytes(rstrm, addr, current)) - return (FALSE); - addr += current; - rstrm->fbtbc -= current; - len -= current; - } - return (TRUE); -} - -static bool_t -xdrrec_putbytes (XDR *xdrs, const char *addr, unsigned int len) -{ - register RECSTREAM *rstrm = (RECSTREAM *) (xdrs->x_private); - register unsigned int current; - - while (len > 0) { - current = rstrm->out_boundry - rstrm->out_finger; - current = (len < current) ? len : current; - memmove(rstrm->out_finger, addr, current); - rstrm->out_finger += current; - addr += current; - len -= current; - if (rstrm->out_finger == rstrm->out_boundry) { - rstrm->frag_sent = TRUE; - if (!flush_out(rstrm, FALSE)) - return (FALSE); - } - } - return (TRUE); -} - -static unsigned int -xdrrec_getpos (const XDR *xdrs) -{ - register RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private; - register long pos; - - pos = lseek((int)((long) rstrm->tcp_handle), (long) 0, 1); - if (pos != -1) - switch (xdrs->x_op) { - - case XDR_ENCODE: - pos += rstrm->out_finger - rstrm->out_base; - break; - - case XDR_DECODE: - pos -= rstrm->in_boundry - rstrm->in_finger; - break; - - default: - pos = (unsigned int) - 1; - break; - } - return ((unsigned int) pos); -} - -static bool_t -xdrrec_setpos (XDR *xdrs, unsigned int pos) -{ - register RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private; - unsigned int currpos = xdrrec_getpos(xdrs); - int delta = currpos - pos; - char* newpos; - - if ((int) currpos != -1) - switch (xdrs->x_op) { - - case XDR_ENCODE: - newpos = rstrm->out_finger - delta; - if ((newpos > (char*) (rstrm->frag_header)) && - (newpos < rstrm->out_boundry)) { - rstrm->out_finger = newpos; - return (TRUE); - } - break; - - case XDR_DECODE: - newpos = rstrm->in_finger - delta; - if ((delta < (int) (rstrm->fbtbc)) && - (newpos <= rstrm->in_boundry) && - (newpos >= rstrm->in_base)) { - rstrm->in_finger = newpos; - rstrm->fbtbc -= delta; - return (TRUE); - } - break; - } - return (FALSE); -} - -static int32_t *xdrrec_inline(XDR* xdrs, unsigned int len) -{ - register RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private; - int32_t *buf = NULL; - - switch (xdrs->x_op) { - - case XDR_ENCODE: - if ((rstrm->out_finger + len) <= rstrm->out_boundry) { - buf = (int32_t *) rstrm->out_finger; - rstrm->out_finger += len; - } - break; - - case XDR_DECODE: - if ((len <= rstrm->fbtbc) && - ((rstrm->in_finger + len) <= rstrm->in_boundry)) { - buf = (int32_t *) rstrm->in_finger; - rstrm->fbtbc -= len; - rstrm->in_finger += len; - } - break; - } - return (buf); -} - -static void -xdrrec_destroy (XDR *xdrs) -{ - register RECSTREAM *rstrm = (RECSTREAM *) xdrs->x_private; - - mem_free(rstrm->the_buffer, - rstrm->sendsize + rstrm->recvsize + BYTES_PER_XDR_UNIT); - mem_free((char*) rstrm, sizeof(RECSTREAM)); -} - - -/* - * Exported routines to manage xdr records - */ - -/* - * Before reading (deserializing from the stream, one should always call - * this procedure to guarantee proper record alignment. - */ -bool_t xdrrec_skiprecord(xdrs) -XDR *xdrs; -{ - register RECSTREAM *rstrm = (RECSTREAM *) (xdrs->x_private); - - while (rstrm->fbtbc > 0 || (!rstrm->last_frag)) { - if (!skip_input_bytes(rstrm, rstrm->fbtbc)) - return (FALSE); - rstrm->fbtbc = 0; - if ((!rstrm->last_frag) && (!set_input_fragment(rstrm))) - return (FALSE); - } - rstrm->last_frag = FALSE; - return (TRUE); -} - -/* - * Look ahead fuction. - * Returns TRUE iff there is no more input in the buffer - * after consuming the rest of the current record. - */ -bool_t xdrrec_eof(xdrs) -XDR *xdrs; -{ - register RECSTREAM *rstrm = (RECSTREAM *) (xdrs->x_private); - - while (rstrm->fbtbc > 0 || (!rstrm->last_frag)) { - if (!skip_input_bytes(rstrm, rstrm->fbtbc)) - return (TRUE); - rstrm->fbtbc = 0; - if ((!rstrm->last_frag) && (!set_input_fragment(rstrm))) - return (TRUE); - } - if (rstrm->in_finger == rstrm->in_boundry) - return (TRUE); - return (FALSE); -} - -/* - * The client must tell the package when an end-of-record has occurred. - * The second paraemters tells whether the record should be flushed to the - * (output) tcp stream. (This let's the package support batched or - * pipelined procedure calls.) TRUE => immmediate flush to tcp connection. - */ -bool_t xdrrec_endofrecord(xdrs, sendnow) -XDR *xdrs; -bool_t sendnow; -{ - register RECSTREAM *rstrm = (RECSTREAM *) (xdrs->x_private); - register unsigned long len; /* fragment length */ - - if (sendnow || rstrm->frag_sent || - (rstrm->out_finger + BYTES_PER_XDR_UNIT >= rstrm->out_boundry)) { - rstrm->frag_sent = FALSE; - return (flush_out(rstrm, TRUE)); - } - len = rstrm->out_finger - (char *)rstrm->frag_header - - BYTES_PER_XDR_UNIT; - *(rstrm->frag_header) = htonl((unsigned long) len | LAST_FRAG); - rstrm->frag_header = (uint32_t *) rstrm->out_finger; - rstrm->out_finger += BYTES_PER_XDR_UNIT; - return (TRUE); -} - |