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-rw-r--r--contrib/tftp/tftpsubs.c260
1 files changed, 0 insertions, 260 deletions
diff --git a/contrib/tftp/tftpsubs.c b/contrib/tftp/tftpsubs.c
deleted file mode 100644
index 608d64ec..00000000
--- a/contrib/tftp/tftpsubs.c
+++ /dev/null
@@ -1,260 +0,0 @@
-/*
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
-#ifndef lint
-static char sccsid[] = "@(#)tftpsubs.c 5.4 (Berkeley) 6/29/88";
-#endif /* not lint */
-
-/* Simple minded read-ahead/write-behind subroutines for tftp user and
- server. Written originally with multiple buffers in mind, but current
- implementation has two buffer logic wired in.
-
- Todo: add some sort of final error check so when the write-buffer
- is finally flushed, the caller can detect if the disk filled up
- (or had an i/o error) and return a nak to the other side.
-
- Jim Guyton 10/85
- */
-
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <netinet/in.h>
-#include <arpa/tftp.h>
-#include <stdio.h>
-
-#define PKTSIZE (1432+4) /* SEGSIZE+4 */ /* should be moved to tftp.h */
-
-struct bf {
- int counter; /* size of data in buffer, or flag */
- char buf[PKTSIZE]; /* room for data packet */
-} bfs[2];
-
- /* Values for bf.counter */
-#define BF_ALLOC -3 /* alloc'd but not yet filled */
-#define BF_FREE -2 /* free */
-/* [-1 .. SEGSIZE] = size of data in the data buffer */
-
-extern int segsize;
-
-static int nextone; /* index of next buffer to use */
-static int current; /* index of buffer in use */
-
- /* control flags for crlf conversions */
-int newline = 0; /* fillbuf: in middle of newline expansion */
-int prevchar = -1; /* putbuf: previous char (cr check) */
-
-struct tftphdr *rw_init();
-
-struct tftphdr *w_init() { return rw_init(0); } /* write-behind */
-struct tftphdr *r_init() { return rw_init(1); } /* read-ahead */
-
-struct tftphdr *
-rw_init(x) /* init for either read-ahead or write-behind */
-int x; /* zero for write-behind, one for read-head */
-{
- newline = 0; /* init crlf flag */
- prevchar = -1;
- bfs[0].counter = BF_ALLOC; /* pass out the first buffer */
- current = 0;
- bfs[1].counter = BF_FREE;
- nextone = x; /* ahead or behind? */
- return (struct tftphdr *)bfs[0].buf;
-}
-
-
-/* Have emptied current buffer by sending to net and getting ack.
- Free it and return next buffer filled with data.
- */
-readit(file, dpp, convert)
- FILE *file; /* file opened for read */
- struct tftphdr **dpp;
- int convert; /* if true, convert to ascii */
-{
- struct bf *b;
-
- bfs[current].counter = BF_FREE; /* free old one */
- current = !current; /* "incr" current */
-
- b = &bfs[current]; /* look at new buffer */
- if (b->counter == BF_FREE) /* if it's empty */
- read_ahead(file, convert); /* fill it */
-/* assert(b->counter != BF_FREE); /* check */
- *dpp = (struct tftphdr *)b->buf; /* set caller's ptr */
- return b->counter;
-}
-
-/*
- * fill the input buffer, doing ascii conversions if requested
- * conversions are lf -> cr,lf and cr -> cr, nul
- */
-read_ahead(file, convert)
- FILE *file; /* file opened for read */
- int convert; /* if true, convert to ascii */
-{
- register int i;
- register char *p;
- register int c;
- struct bf *b;
- struct tftphdr *dp;
-
- b = &bfs[nextone]; /* look at "next" buffer */
- if (b->counter != BF_FREE) /* nop if not free */
- return;
- nextone = !nextone; /* "incr" next buffer ptr */
-
- dp = (struct tftphdr *)b->buf;
-
- if (convert == 0) {
- int i;
- b->counter = 0;
- do {
- i = read(fileno(file), dp->th_data + b->counter,
- segsize - b->counter);
- if (i > 0)
- b->counter += i;
- } while (i != 0 && !(i < 0 && errno != EINTR) &&
- b->counter < segsize);
- return;
- }
-
- p = dp->th_data;
- for (i = 0 ; i < segsize; i++) {
- if (newline) {
- if (prevchar == '\n')
- c = '\n'; /* lf to cr,lf */
- else c = '\0'; /* cr to cr,nul */
- newline = 0;
- }
- else {
- c = getc(file);
- if (c == EOF) break;
- if (c == '\n' || c == '\r') {
- prevchar = c;
- c = '\r';
- newline = 1;
- }
- }
- *p++ = c;
- }
- b->counter = (int)(p - dp->th_data);
-}
-
-/* Update count associated with the buffer, get new buffer
- from the queue. Calls write_behind only if next buffer not
- available.
- */
-writeit(file, dpp, ct, convert)
- FILE *file;
- struct tftphdr **dpp;
- int convert;
-{
- bfs[current].counter = ct; /* set size of data to write */
- current = !current; /* switch to other buffer */
- if (bfs[current].counter != BF_FREE) /* if not free */
- write_behind(file, convert); /* flush it */
- bfs[current].counter = BF_ALLOC; /* mark as alloc'd */
- *dpp = (struct tftphdr *)bfs[current].buf;
- return ct; /* this is a lie of course */
-}
-
-/*
- * Output a buffer to a file, converting from netascii if requested.
- * CR,NUL -> CR and CR,LF => LF.
- * Note spec is undefined if we get CR as last byte of file or a
- * CR followed by anything else. In this case we leave it alone.
- */
-write_behind(file, convert)
- FILE *file;
- int convert;
-{
- char *buf;
- int count;
- register int ct;
- register char *p;
- register int c; /* current character */
- struct bf *b;
- struct tftphdr *dp;
-
- b = &bfs[nextone];
- if (b->counter < -1) /* anything to flush? */
- return 0; /* just nop if nothing to do */
-
- count = b->counter; /* remember byte count */
- b->counter = BF_FREE; /* reset flag */
- dp = (struct tftphdr *)b->buf;
- nextone = !nextone; /* incr for next time */
- buf = dp->th_data;
-
- if (count <= 0) return -1; /* nak logic? */
-
- if (convert == 0)
- return write(fileno(file), buf, count);
-
- p = buf;
- ct = count;
- while (ct--) { /* loop over the buffer */
- c = *p++; /* pick up a character */
- if (prevchar == '\r') { /* if prev char was cr */
- if (c == '\n') /* if have cr,lf then just */
- fseek(file, -1, 1); /* smash lf on top of the cr */
- else
- if (c == '\0') /* if have cr,nul then */
- goto skipit; /* just skip over the putc */
- /* else just fall through and allow it */
- }
- putc(c, file);
-skipit:
- prevchar = c;
- }
- return count;
-}
-
-
-/* When an error has occurred, it is possible that the two sides
- * are out of synch. Ie: that what I think is the other side's
- * response to packet N is really their response to packet N-1.
- *
- * So, to try to prevent that, we flush all the input queued up
- * for us on the network connection on our host.
- *
- * We return the number of packets we flushed (mostly for reporting
- * when trace is active).
- */
-
-int
-synchnet(f)
-int f; /* socket to flush */
-{
- int i, j = 0;
- char rbuf[PKTSIZE];
- struct sockaddr_in from;
- int fromlen;
-
- while (1) {
- (void) ioctl(f, FIONREAD, &i);
- if (i) {
- j++;
- fromlen = sizeof from;
- (void) recvfrom(f, rbuf, sizeof (rbuf), 0,
- (struct sockaddr *)&from, &fromlen);
- } else {
- return(j);
- }
- }
-}
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