diff options
Diffstat (limited to 'ftp-proxy/getline.c')
| -rw-r--r-- | ftp-proxy/getline.c | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/ftp-proxy/getline.c b/ftp-proxy/getline.c deleted file mode 100644 index 97ffd48c6e301..0000000000000 --- a/ftp-proxy/getline.c +++ /dev/null @@ -1,259 +0,0 @@ -/* $OpenBSD: getline.c,v 1.16 2004/09/16 04:50:51 deraadt Exp $ */ - -/* - * Copyright (c) 1985, 1988 Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)ftpcmd.y 5.24 (Berkeley) 2/25/91 - */ - -#include <sys/types.h> -#include <sys/socket.h> - -#include <netinet/in.h> -#include <arpa/telnet.h> - -#include <errno.h> -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <sysexits.h> -#include <syslog.h> -#include <unistd.h> - -#include "util.h" - -int refill_buffer(struct csiob *iobp); - -/* - * Refill the io buffer if we KNOW that data is available - * - * Returns 1 if any new data was obtained, 0 otherwise. - */ - -int -refill_buffer(struct csiob *iobp) -{ - int rqlen, rlen; - - if (!(iobp->data_available)) - return(0); - - if (iobp->got_eof) - return(0); - - /* - * The buffer has been entirely consumed if next_byte == io_buffer_len. - * Otherwise, there is some still-to-be-used data in io_buffer. - * Shuffle it to the start of the buffer. - * Note that next_byte will never exceed io_buffer_len. - * Also, note that we MUST use bcopy because the two regions could - * overlap (memcpy isn't defined to work properly with overlapping - * regions). - */ - if (iobp->next_byte < iobp->io_buffer_len) { - int dst_ix = 0; - int src_ix = iobp->next_byte; - int amount = iobp->io_buffer_len - iobp->next_byte; - - bcopy(&iobp->io_buffer[src_ix], &iobp->io_buffer[dst_ix], - amount); - iobp->io_buffer_len = amount; - } else if (iobp->next_byte == iobp->io_buffer_len) - iobp->io_buffer_len = 0; - else { - syslog(LOG_ERR, "next_byte(%d) > io_buffer_len(%d)", - iobp->next_byte, iobp->io_buffer_len); - exit(EX_OSERR); - } - - iobp->next_byte = 0; - - /* don't do tiny reads, grow first if we need to */ - rqlen = iobp->io_buffer_size - iobp->io_buffer_len; - if (rqlen <= 128) { - unsigned char *tmp; - - iobp->io_buffer_size += 128; - tmp = realloc(iobp->io_buffer, iobp->io_buffer_size); - if (tmp == NULL) { - syslog(LOG_INFO, "Insufficient memory"); - exit(EX_UNAVAILABLE); - } - iobp->io_buffer = tmp; - rqlen = iobp->io_buffer_size - iobp->io_buffer_len; - } - - /* - * Always leave an unused byte at the end of the buffer - * because the debug output uses that byte from time to time - * to ensure that something that is being printed is \0 terminated. - */ - rqlen -= 1; - - doread: - rlen = read(iobp->fd, &iobp->io_buffer[iobp->io_buffer_len], rqlen); - iobp->data_available = 0; - switch (rlen) { - case -1: - if (errno == EAGAIN || errno == EINTR) - goto doread; - if (errno != ECONNRESET) { - syslog(LOG_INFO, "read() failed on socket from %s (%m)", - iobp->who); - exit(EX_DATAERR); - } - /* fall through to EOF case */ - case 0: - iobp->got_eof = 1; - return(0); - break; - default: - iobp->io_buffer_len += rlen; - break; - } - return(1); -} - -/* - * telnet_getline - a hacked up version of fgets to ignore TELNET escape codes. - * - * This code is derived from the getline routine found in the UC Berkeley - * ftpd code. - * - */ - -int -telnet_getline(struct csiob *iobp, struct csiob *telnet_passthrough) -{ - unsigned char ch; - int ix; - unsigned char tbuf[100]; - - iobp->line_buffer[0] = '\0'; - - /* - * If the buffer is empty then refill it right away. - */ - if (iobp->next_byte == iobp->io_buffer_len) - if (!refill_buffer(iobp)) - return(0); - - /* - * Is there a telnet command in the buffer? - */ - ch = iobp->io_buffer[iobp->next_byte]; - if (ch == IAC) { - /* - * Yes - buffer must have at least three bytes in it - */ - if (iobp->io_buffer_len - iobp->next_byte < 3) { - if (!refill_buffer(iobp)) - return(0); - if (iobp->io_buffer_len - iobp->next_byte < 3) - return(0); - } - - iobp->next_byte++; - ch = iobp->io_buffer[iobp->next_byte++]; - - switch (ch) { - case WILL: - case WONT: - case DO: - case DONT: - tbuf[0] = IAC; - tbuf[1] = ch; - tbuf[2] = iobp->io_buffer[iobp->next_byte++]; - (void)send(telnet_passthrough->fd, tbuf, 3, - telnet_passthrough->send_oob_flags); - break; - case IAC: - break; - default: - break; - } - return(1); - } else { - int clen; - - /* - * Is there a newline in the buffer? - */ - for (ix = iobp->next_byte; ix < iobp->io_buffer_len; - ix += 1) { - if (iobp->io_buffer[ix] == '\n') - break; - if (iobp->io_buffer[ix] == '\0') { - syslog(LOG_INFO, - "got NUL byte from %s - bye!", - iobp->who); - exit(EX_DATAERR); - } - } - - if (ix == iobp->io_buffer_len) { - if (!refill_buffer(iobp)) - return(0); - /* - * Empty line returned - * will try again soon! - */ - return(1); - } - - /* - * Expand the line buffer if it isn't big enough. We - * use a fudge factor of 5 rather than trying to - * figure out exactly how to account for the '\0 \r\n' and - * such. The correct fudge factor is 0, 1 or 2 but - * anything higher also works. We also grow it by a - * bunch to avoid having to do this often. Yes this is - * nasty. - */ - if (ix - iobp->next_byte > iobp->line_buffer_size - 5) { - unsigned char *tmp; - - iobp->line_buffer_size = 256 + ix - iobp->next_byte; - tmp = realloc(iobp->line_buffer, - iobp->line_buffer_size); - if (tmp == NULL) { - syslog(LOG_INFO, "Insufficient memory"); - exit(EX_UNAVAILABLE); - } - iobp->line_buffer = tmp; - } - - /* +1 is for the newline */ - clen = (ix+1) - iobp->next_byte; - memcpy(iobp->line_buffer, &iobp->io_buffer[iobp->next_byte], - clen); - iobp->next_byte += clen; - iobp->line_buffer[clen] = '\0'; - return(1); - } -} |